JP4253091B2 - Manufacturing method of sealing structure of press-fit joint terminal - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sealing structure and a sealing method for a press-contact joint terminal used for connecting covered electric wires in a wire harness or the like.
[0002]
[Prior art]
Conventionally, what is shown in FIG. 7 is known as a press-contact joint terminal for connecting covered electric wires of a wire harness such as an automobile. The pressure-joint joint terminal 1 is formed by pressing a single conductive plate into a U-shaped cross section, and a plurality of frame portions 2 and a plurality of portions formed by raising both ends of the frame portion 2 vertically. And the press contact terminal portion 3. The plurality of press contact terminal portions 3 are arranged at a predetermined pitch. Each press contact terminal portion 3 is formed with a slit 4 whose width gradually decreases from the upper end portion to the center portion. Further, clearance grooves 5 are formed between the respective pressure contact terminal portions 3. Each press-connecting terminal portion 3 of the press-connecting joint terminal 1 breaks the covering of the covered electric wire 6 and contacts the internal conductor by sandwiching the covered electric wire 6 between the slits 4. In the example shown in the figure, five covered electric wires 6 are electrically connected to each other by one press contact joint terminal 1. The press-contact joint terminal 1 is accommodated in a housing (not shown) to constitute a joint connector. In conventional joint connectors, when the coated conductor is pulled, the coated wire is folded and press-fitted into the connector so that it does not deform due to an excessive load applied to the press contact terminal, That prevents the movement of the electric wire (Japanese Patent Laid-Open No. Hei 10-162880), or the one that prevents the movement of the electric wire by pressing the electric wire while bending it into a crank shape with a rotating holding portion (special feature) Kaihei 10-270099) and the like are known.
[0003]
[Problems to be solved by the invention]
However, it is difficult for the above-described conventional joint connector to have a completely waterproof structure due to its structure. Furthermore, the former configuration is not suitable for automation of the manufacturing process. Further, the latter method has a problem that the structure of the connector becomes complicated and the cost of the connector increases.
[0004]
The present invention has been made to solve such problems, and can improve waterproof performance, insulation performance and resistance to tensile load without complicating the manufacturing process, and is small and low cost. It is an object of the present invention to provide a sealing structure and a sealing method for a pressure contact joint terminal.
[0005]
[Means for Solving the Problems]
The sealing structure of the press-contact joint terminal according to the present invention includes a plurality of press-contact terminal portions that are electrically connected to each other, breaking the covering of the covered electric wire by sandwiching the covered electric wire and contacting the inner conductor, A pressure-joint joint terminal that connects the covered electric wires sandwiched between the pressure-contact terminals, and an insulation molded body that seals the pressure-welded joint terminals together with the covered wires that are pressure-connected to the pressure contact terminals. It is characterized by.
[0006]
Further, the sealing method of the press-contact joint terminal according to the present invention includes press-fitting a covered wire into each press-contact terminal portion of the press-contact joint terminal including a plurality of press-connect terminal portions electrically connected to each other. A press-fitting step of breaking the coating and bringing the inner conductor into contact with each press-contact terminal portion; and a molding step of sealing the press-contact joint terminal together with the covered electric wire press-connected to each press-contact terminal portion with an insulating molded body. It is characterized by that.
[0007]
According to the present invention, the press-joint joint terminal is sealed inside the insulation molded body together with the covered electric wire press-contacted to each press-contact terminal portion, so the inner conductor of the covered electric wire and each press-contact terminal portion The contact portion is completely sealed by the insulating molded body, and a waterproof function and an insulating function are realized. At the same time, since the covered electric wire is covered with the insulating molded body, the resistance against the tensile load of the covered conductor is also improved. Thereby, the electrical reliability of a press-contact part can be improved.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. 1A and 1B are views showing a sealing structure of a pressure contact joint terminal according to an embodiment of the present invention, in which FIG. 1A is a cross-sectional view seen from the side, and FIG. 1B is a front view. As shown in the figure, the pressure contact joint terminal sealing structure 10 includes a pressure contact joint terminal 11 formed by pressing a conductive plate, and the pressure contact joint terminal 11 together with a coated conductor 12, for example, a resin. It is comprised from the insulation molded bodies 13, such as. The press-contact joint terminal 11 is formed by pressing a single conductive plate in the same manner as the press-joint joint terminal 11 shown in FIG. 7, and includes a frame portion 21 and a plurality of vertically rising from both ends of the frame portion 21. And the press-contact terminal portion 22. The plurality of press contact terminal portions 22 are arranged at a predetermined pitch. Each press contact terminal portion 22 is formed with a wire clamping slit 31 that gradually decreases in width from the upper end portion to the center portion, and the press contact blade that breaks the coating of the wire at the entrance and edge portion of the slit 31. Is forming. Further, clearance grooves 32 are formed between the respective pressure contact terminal portions 22. Each press-contact terminal portion 22 of the press-contact joint terminal 11 breaks the covering of the covered electric wire 12 and contacts the internal conductor by sandwiching the covered electric wire 12 between the slits 31. In the example shown in the drawing, the press-contact joint terminal 11 electrically connects, for example, five covered electric wires 12 to each other.
[0009]
FIG. 2 is a view for explaining a manufacturing process, that is, a sealing method for realizing the sealing structure 10 of the press-contact joint terminal.
As shown in FIG. 5A, the lower mold 41 of the mold is open at its side, and the first slide mold 42 is used as a spacer from the opened side as a mold 41. Is slid from the side in the direction indicated by the solid arrow in the figure. The pressure joint terminal 11 is supported on the first slide mold 42. And the covered electric wire 12 is arrange | positioned in the entrance part of each slit 31 of the press-contacting joint terminal 11, and the covering of the covered electric wire 12 is made into the slit 31 by pushing the covered electric wire 12 into the press-contacting joint terminal 11 from the top with the press-fitting jig 43. The inner conductor is brought into contact with the pressure joint terminal 11 by being broken. The above is the press-fitting process.
[0010]
Next, in this state, the first slide mold 42 is slid as shown by a dotted arrow in the figure to be removed from the lower mold 41, and the second slide mold 44 is shown in the upward direction as shown by an arrow in the figure from below. The upper mold 45 is set on the lower mold 41 and the inlet 46 of the lower mold 41 and the inlet 47 of the upper mold 45 are closed. Insulating resin is injected into a space surrounded by the lower mold 41, the upper mold 45, and the second slide mold 44, and molding is performed.
[0011]
Thereby, the sealing structure by the molded object of a press-contact joint terminal is realizable. According to this method, press-fitting step and a period of molding, since the positional relationship between the lower die 41 and the pressure joint terminal 11 does not move, is suitable for automation, it is possible to increase the production efficiency.
[0012]
FIG. 3 is a diagram showing another embodiment. In this embodiment, instead of supporting the press contact joint terminal 11 by the slide mold 42 as a spacer during the press-fitting process, a plate-like insulator 51 is disposed on the lower mold 41 as a spacer, and during the press-fitting process, The pressure-joint joint terminal 11 is supported on the insulator 51 and the insulator 51 is sealed together with the insulating molded body 13. According to this embodiment, the manufacturing cost of the mold can be reduced by not using the slide mold.
[0013]
FIG. 4 is an embodiment in which the resistance against the tensile load of the covered electric wire 12 is further improved. FIG. 4A is an example in which the covered electric wire 12 is bent downward and integrated with the insulating molded body 13. b) is an example in which the covered electric wire 12 is bent into a crank shape and integrated with the insulating molded body 13. Moreover, this invention is applicable not only to the connection in the middle of the covered electric wire mentioned above but to the connector of the type which connects the edge part of the covered electric wire 12 like FIG.
[0014]
6A and 6B are diagrams showing a sealing structure of a pressure-joint joint terminal according to another embodiment of the present invention. FIG. 6A is a cross-sectional view seen from above, and FIG. 6B is a cross-sectional view seen from the side. FIG. 4C is a front view.
As shown in the figure, the press-contact joint terminal 61 used in the sealing structure 60 is composed of a frame portion 62 and a plurality of press-contact terminal portions 63 rising vertically from the frame portion 62. The plurality of press contact terminal portions 63 are alternately arranged on one conductive plate so that the press contact terminal portions 63 adjacent to each other in a direction orthogonal to the extending direction of the covered wire 12 partially overlap each other when viewed from the extending direction of the covered wire 12. In addition, at least two press contact terminal portions 63 that are in contact with the same covered wire 12 are arranged in the extending direction of the covered wire 12.
[0015]
Since the arrangement | positioning pitch of the covered electric wire 12 can be shortened rather than the thing of a previous Example as the press-contacting joint terminal 61 is such a structure, the magnitude | size of the whole sealing part can be made small.
[0016]
【The invention's effect】
As described above, according to the present invention, the pressure-joint joint terminal is sealed inside the insulation molded body together with the covered electric wire press-contacted to each press-contact terminal portion. The contact portion with the press contact terminal portion is completely sealed by the insulating molded body, so that the waterproof function, the insulating function, and the resistance against the tensile load of the coated conductor can be improved. Further, there is no need for a housing for protecting the terminal, a cover for protecting, a strain relief for improving resistance against a tensile load, and the like, and the number of parts can be reduced and the size can be reduced.
[Brief description of the drawings]
1A and 1B are views showing a sealing structure of a pressure-joint joint terminal according to an embodiment of the present invention, in which FIG. 1A is a broken view seen from the side, and FIG. 1B is a front view.
FIG. 2 is a schematic cross-sectional view for explaining a sealing method for forming the sealing structure.
FIG. 3 is a cross-sectional view showing a sealing structure of a pressure-joint joint terminal according to another embodiment of the present invention.
FIG. 4 is a cross-sectional view showing a sealing structure of a pressure-joint joint terminal according to still another embodiment of the present invention.
FIG. 5 is a cross-sectional view showing a sealing structure of a pressure contact joint terminal according to still another embodiment of the present invention.
FIG. 6 is a cross-sectional view (a), a side view (b), and a front view (c), viewed from above, showing a sealing structure of a pressure-joint joint terminal according to still another embodiment of the present invention. is there.
7A and 7B are diagrams showing the structure of a pressure joint terminal, wherein FIG. 7A is a plan view, FIG. 7B is a side view, and FIG. 7C is a front view.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,11,61 ... Pressure-contact joint terminal, 2, 21, 62 ... Frame part, 3, 22, 63 ... Pressure-contact terminal part, 6,12 ... Covered electric wire, 13 ... Insulation molded object.

Claims (2)

A covered wire is press-fitted into each pressure contact terminal portion of a pressure contact joint terminal having a plurality of pressure contact terminals electrically connected to each other, and the sheath of the covered wire is broken to contact the inner conductor with each pressure contact terminal portion. A press-fit process, and a cover in which the press-contact joint terminal is press-connected to each press-contact terminal part by molding using an upper mold for molding and a lower mold with open side parts A method of manufacturing a sealing structure of a pressure contact joint terminal , comprising a molding step of sealing with an electric wire together with an electric wire,
In the press-fitting process, the first slide mold is slid as a spacer from the opened side portion of the lower mold, and between the lower mold used in the molding process and the press-contact joint terminal. The covered electric wire is press-fitted into the pressure-joint joint terminal in a state where the pressure-joint joint terminal is supported by the lower mold via the first slide mold, with the first slide mold interposed.
In the molding step, after the press-fitting step, the first slide mold is slid from the lower mold and removed, and a second slide mold is slid to close the side surface of the lower mold. A method for manufacturing a sealing structure of a pressure contact joint terminal , wherein the molding is performed as it is without moving the pressure contact joint terminal. A covered wire is press-fitted into each pressure contact terminal portion of a pressure contact joint terminal having a plurality of pressure contact terminals electrically connected to each other, and the sheath of the covered wire is broken to contact the inner conductor with each pressure contact terminal portion. and press-fitting step of, by molding using an upper mold and a lower mold for molding, the pressure joint terminal wherein an insulating molded body with pressure connected covered wires to each pressure contact terminal portions A method for manufacturing a sealing structure of a press-contact joint terminal , comprising a molding step for sealing,
In the press-fitting step, a spacer made of an insulating plate sealed in the insulating molded body together with the press-fit joint terminal in the molding step is interposed between the lower mold used in the molding step and the press-fit joint terminal. Interposing and press-fitting the covered electric wire into the pressure contact joint terminal in a state where the pressure contact joint terminal is supported by the lower mold through the spacer,
The method for manufacturing a sealing structure of a press-contact joint terminal , wherein the molding step performs the molding as it is without moving the press-contact joint terminal after the press-fit step.

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