JPH10223349A - Insert molding connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out insert molding without causing deformation of a terminal metal fitting. SOLUTION: A widening part 5 of a planar circular arc shape is formed in a portion corresponding to a gate 12 in a terminal metal fitting 1, and an opening 7 is formed in the widening part 5. When the terminal metal fittings 1 are contained in a cavity 11 of a molding die 10, the terminal fittings 1 are arranged back and forth, and are contained in a position where a circular arc-shaped face 8 on the bulge side of the widening part 5 is oriented to the gate 12 at the front of the gate 12. Synthetic resin ejected from the gate 12 passes through the opening 7 as shown by an arrow, and is guided in the circular arc-shaped face 8. The cavity 11 is charged with the synthetic resin while flowing to both sides in order that a housing is formed. Although the terminal metal fitting 1 corresponds to the front of the gate 12, the ejected synthetic resin hardly meets with resistance and circulates through the cavity 11. In addition, the rigidity of the widening part 5 is enhanced to prevent the terminal metal fitting 1 subjected to resin pressure from being flexed and deformed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert molded connector.

[0002]

2. Description of the Related Art This type of insert-molded connector is used for a fuel tank connector as disclosed in, for example, Japanese Patent Application Laid-Open No. 63-211177. In this structure, as shown in FIG. 7, a terminal fitting a is incorporated into a housing b by insert molding, and male connector sections c and d are provided at both ends. When such a connector is to be insert-molded, the terminal fitting a is housed in the cavity of the molding die, and each end is inserted into a mounting groove provided in the wall surface of the cavity, and the gate is synthesized from the gate in the cavity. Housing b by injection filling of resin
Is to be molded.

[0003]

In the case of insert molding as described above, depending on the structure of the molding die e, for example, depending on the setting position of the parting line and the installation position of the gate, FIG. As described above, the plate surface of the terminal fitting a accommodated in the cavity f may face the gate g from the front. When insert molding is performed in such a state, the synthetic resin injected from the gate g may directly hit the plate surface of the terminal fitting a, and the terminal fitting a may be bent and deformed in an arc shape. Then, the end portions of the terminal fittings a in the male connector portions c and d may be inclined or the protruding length may change, and in extreme cases, the terminal fittings a may come into contact with each other. The insert molded connector of the present invention has been completed based on the above circumstances, and an object thereof is to prevent the terminal fitting from being deformed during molding.

[0004]

In order to achieve the above object, according to the first aspect of the present invention, a terminal fitting is housed in a cavity of a molding die, and a synthetic resin is injected and filled from a gate into the cavity. In the insert-molded connector having the housing formed therein, when the terminal is received in the cavity, the synthetic resin injected from the gate flows through the surface of the terminal facing the gate with a small resistance. It is characterized in that a guide portion for guiding is formed. A second aspect of the present invention is characterized in that, in the first aspect of the present invention, an opening for passing the injected synthetic resin is formed on a plate surface of the terminal fitting facing the gate. .

[0005]

Actions and effects of the present invention

<Invention of Claim 1> When a synthetic resin is injected from a gate, the synthetic resin flows through the guide portion with little resistance from the terminal fittings and fills the cavity. Accordingly, the terminal fitting is prevented from being bent and deformed, and an insert molded connector in which the terminal fitting is assembled at a proper position in the housing can be obtained. <Invention of claim 2> The injected synthetic resin is filled while passing through the opening of the terminal fitting, whereby the deformation of the terminal fitting is more reliably prevented.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. <First Embodiment> First, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a connector A in a product state according to this embodiment is made of a set of terminal fittings 1 made of synthetic resin such as PBT by insert molding.
(Polybutylene terephthalate) is incorporated in a housing 2 and male connectors 3 are provided at both ends.

The terminal fitting 1 is formed in a straight posture as a whole as shown in FIG. 2 by press-forming a conductive metal plate, and a wide-width portion 5 is provided at the center in the length direction. At the same time, tab portions 6 are protruded from both ends. The widened portion 5 is formed in a planar arc shape, and an opening 7 is formed in a central portion thereof.

Next, the molding step will be described. Mold 1
3, a cavity 11 is provided to form the housing 2 as shown in FIG. 3, and a gate 12 from which a synthetic resin is injected is provided on the inner surface thereof. That gate 1
2 is located at a substantially central height of the cavity 11. At the time of molding, one set of terminal fittings 1 is housed in the cavity 11 of the molding die 10, and each terminal fitting 1 is located at the front of the gate 12, as shown in FIG. The arcuate surfaces 8 on the swelling side are arranged at an interval in the front and rear direction facing the gate 12, and the tabs 6 at both ends are inserted into mounting grooves (not shown) formed on both upper and lower surfaces of the cavity 11. Is positioned.

Subsequently, the molten synthetic resin is injected from the gate 12, and the injected synthetic resin passes through the opening 7 of the widened portion 5 of the terminal fitting 1 as shown by an arrow in FIG. The housing 2 is formed while being filled in the cavity 11 while being guided by the arc-shaped surface 8 and flowing to both sides.
Despite the fact that the terminal fitting 1 corresponds to the front of the gate 12, the injected synthetic resin flows into the cavity 11 with little resistance, and the terminal fitting 1 is deformed by receiving the resin pressure. Is prevented. When the mold is opened after the synthetic resin has solidified, as shown in FIG. 1, a connector A in which the terminal fittings 1 are assembled at the proper positions is obtained.

As described above, according to the present embodiment, the portion of the terminal fitting 1 corresponding to the gate 12 is formed as the widened portion 5 having the arc-shaped surface 8 and the opening 7 is provided at the center thereof. Therefore, the synthetic resin injected from the gate 12 can be circulated without resistance, and the rigidity of the widened portion 5 itself is high, so that the terminal fitting 1 is prevented from being deformed by the resin pressure. Thereby, the male connector 3
The protrusion posture and the protrusion length of the tab portion 6 are properly taken, so that the fitting and connection with the mating connector can be accurately performed, and the occurrence of leakage due to contact between the two terminal fittings 1 can also be prevented. .

<Second Embodiment> FIG. 4 shows a second embodiment of the present invention. In the terminal fitting 21 according to the second embodiment, as in the first embodiment, the widened portion 25 is formed in a planar arc shape, but no opening is formed. Even in such a terminal fitting 21, the arc-shaped surface 2 on the bulging side of the widened portion 25.
8 is accommodated in the cavity 11 so as to face the gate 12, the synthetic resin injected from the gate 12 is guided by the arcuate surface 28 as shown by the arrow in FIG. Since the rigidity of the widened portion 25 itself is increased by being filled in the arc 11 and having an arc shape, the terminal fitting 21 is prevented from being bent and deformed by receiving the resin pressure.

<Third Embodiment> FIG. 5 shows a third embodiment of the present invention. In the terminal fitting 31 according to the third embodiment, the widened portion 35 is formed in a flat mountain shape. When the terminal fitting 31 is housed in the cavity 11 with the top of the mountain facing the gate 12, the synthetic resin injected from the gate 12, as shown by the arrow in FIG. While being guided by 38 and flowing to both sides, it fills the cavity 11 and is formed in a mountain shape, so that the widened portion 35 is formed.
Is also high in rigidity, so that the terminal fitting 31 is similarly prevented from being bent and deformed by receiving resin pressure.

<Fourth Embodiment> FIG. 6 shows a fourth embodiment of the present invention. In the terminal fitting 41 according to the fourth embodiment, the central portion of the widened portion 45 is cut and raised to one side to form an opening 47 and a guide piece 48 projecting obliquely inward from left and right side edges thereof. . And this terminal fitting 41
Is accommodated in the cavity 11 with the side of the opening 47 facing the gate 12 facing the gate 12, the synthetic resin injected from the gate 12 is guided by the guide piece 48 as shown by the arrow in FIG. While passing through the opening 47
In addition, since the rigidity of the widened portion 45 is increased, the terminal fitting 41 is similarly prevented from being deformed by receiving the resin pressure.

<Other Embodiments> The present invention is not limited to the embodiments described above with reference to the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition, various changes can be made without departing from the scope of the invention. (1) The terminal fitting is not limited to the straight one as in the above embodiment, but may be applied to any shape such as one whose end is bent at a right angle. (2) The number of terminal fittings incorporated in the housing is arbitrary. (3) The guide portion and the opening for guiding the flow of the synthetic resin only need to be provided at a portion facing the gate according to the position where the gate is provided.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a product state of a connector according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a terminal fitting.

FIG. 3 is a sectional view of a molding die showing a flowing state of a synthetic resin.

FIG. 4 is a sectional view of a terminal fitting according to a second embodiment of the present invention.

FIG. 5 is a cross-sectional view of a terminal fitting according to a third embodiment.

FIG. 6 is a sectional view of a terminal fitting according to a fourth embodiment.

FIG. 7 is a sectional view of a connector according to a conventional example.

FIG. 8 is a sectional view of a molding die showing the molding state.

[Explanation of symbols]

 A ... Connector 1 ... Terminal fitting 2 ... Housing 5 ... Widening part 7 ... Opening 8 ... Circular surface 10 ... Molding die 11 ... Cavity 12 ... Gate 21 ... Terminal fitting 25 ... Widening part 28 ... Circular surface 31 ... Terminal fittings 35 ... widened section 38 ... slope 41 ... terminal fittings 45 ... widened section 47 ... opening 48 ... guide piece

Claims (2)

[Claims] 1. An insert-molded connector having a housing formed by housing a terminal fitting in a cavity of a molding die and injecting and filling a synthetic resin from a gate into the cavity, wherein the terminal fitting is housed in the cavity. A terminal portion of the terminal fitting facing the gate, wherein a guide portion for guiding the synthetic resin injected from the gate with a small resistance is formed. 2. The insert-molded connector according to claim 1, wherein an opening through which the injected synthetic resin passes is formed in a plate surface of the terminal fitting facing the gate.