JP2003157929A - Pressure welding joint connector and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure welding joint connector with improved water tight performance and high electric reliability and with which processing work is simple and reduction of manufacturing cost can be realized. SOLUTION: The pressure welding joint connector 10 is equipped with a plurality of pressure welding slit sections 13 with slits 14 in which clad cables 15 are pinched and which cut in coating of the clad cables 15 to be electrically connected with core cables inside, and is made up by holding a bus bar 11 to electrically connect each clad cable 15 with the other pinched by the pressure welding slit sections 13 and the pressure welded clad cables 15 pinched by each pressure welding slit sections 13 inside a housing 1 made of an electric insulating material, and tightly filling up a space 16 within the housing 1 with sealing resin Z and tightly sealing it with a covering member 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure welding joint connector for connecting covered conductors in a wire harness of an automobile or the like, and a method for manufacturing the same.
More specifically, it relates to a pressure-contact joint connector for waterproofing a bus bar and a method for manufacturing the same.

[0002]

2. Description of the Related Art As a pressure welding joint connector 50 for connecting covered wires to each other in a wire harness for an automobile, the one as illustrated in FIG. 5 is provided. Figure 5
The pressure-joint joint connector 50 of FIG. 5 is formed by pressing a single conductive metal plate as shown in FIG. 5A to escape the plurality of pressure-contact slit portions 52 formed by vertically raising both ends of the frame portion 51. A bus bar 54 is formed in a U-shaped cross-section with the narrow groove 53 separated and arranged in parallel.
As shown in FIG. 3B, it is housed in a housing 55 made of an electrically insulating material such as plastic, and the covered electric wire 57 is provided in the slit 56 provided in each pressure contact slit portion 52.
By sandwiching the pressure contact slit portion 52 into the sheath of the covered electric wire 57, a plurality of electric wires 57 (five in the figure) are supported in a state where the inner conductor is in contact with the pressure contact slit portion 52. In addition, the plurality of supported electric wires 57 are electrically connected to each other via the frame portion 51 of the bus bar 54. The upper opening 55a of the housing 55 is sealed by a lid member 58 that is attached to the housing 55 by engaging or fitting with the housing 55. Further, the electric wires 57 supported by the bus bar 54 are accommodated in the electric wire accommodating grooves 59 having a shape cut from the upper ends of the opposite side walls 55b of the housing 55, and the back surface (lower surface) of the lid member 58 is accommodated.
It is pressed down by the pressing piece 58a protruding from the.

[0003]

By the way, in the case of a pressure-contact joint connector for a wire harness for an automobile or the like, it is needless to say that the electrical insulation between the inside and the outside is maintained due to its function. When installed in a humid environment, it is necessary to ensure waterproofness in order to prevent leakage of electricity and defective conduction due to corrosion of the bus bar.
However, there is no suitable waterproof structure for the pressure contact joint connector as illustrated in FIG. 5, and its development has been required. In the press-joint joint connector 50 illustrated in FIG. 5, the upper opening 55a of the housing 55 is sealed by the lid member 58, but the wire receiving groove 59 is formed.
For the sealing of the electric wire housing groove 59 and the electric wire housing groove 59
Accuracy of fitting with the pressing piece 58a on the side of the lid member 58 that is fitted to the electric wire housing groove 59 due to deformation of the electric wire 57 strongly pressed in the electric wire housing groove 59 by the pressing piece 58a.
Of the electric wire 5 and, if necessary, the electric wire 5 in the electric wire receiving groove 59.
Adhesive or the like injected for fixing and adhering No. 7 is used. However, in such a sealing structure, there is a problem in that the cost is high, for example, the wire accommodating groove 59 and the pressing piece 58a on the lid member 58 side require high processing accuracy.
In addition, there is a problem that there is a limit to the extension of life under the environment where vibration is repeatedly applied due to traveling of an automobile or the like.
Furthermore, when the number of the electric wires 57 to be connected is small, it is necessary to put a filler in the electric wire accommodation groove 59 to seal the electric wire.
There was a problem that it took time.

In view of this, for example, it is conceivable to secure the waterproof performance by molding the entire pressure contact joint connector 50 from the outside with a water blocking mold resin and sealing it. However, in the case where the whole is sealed with the molding resin in this way, the size naturally increases, and it is not possible to satisfy the recent demand for miniaturization of the connector. In addition, an increase in cost is unavoidable, such as the need for a resin mold. Further, as described above, when the number of the electric wires 57 to be connected is small, it is necessary to close the gap of the electric wire housing groove 59 by inserting a filler or the like so that the molding resin does not fall into the housing 55. ,
The time required for the resin molding process is not small.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a pressure-bonding joint connector which is easy to process and can reduce the manufacturing cost, and which has excellent waterproofness, and a manufacturing method thereof. This is an issue.

[0006]

In order to solve the above, the present invention has the following means. As an invention according to claim 1, a plurality of press-contact slit portions are provided which have slits into which the coated electric wires are press-fitted, and which are cut into the coating of the coated electric wires press-fitted into the slits and which are brought into contact with an inner core wire for electrical connection And a covered electric wire that is electrically connected to the covered electric wires sandwiched between the pressure contact slits, and a covered electric wire that is sandwiched between the pressure contact slits of the bus bar and connected by pressure contact And a space inside the housing is tightly filled with a sealing resin and hermetically sealed. According to a second aspect of the present invention, a plurality of press-contact slit portions each having a slit into which a covered electric wire is press-fitted, are cut into the cover of the covered electric wire press-fitted into the slit, and are electrically connected by contacting an inner core wire. And a covered electric wire that is electrically connected to the covered electric wires sandwiched between the pressure contact slits and that is covered by the pressure contact slits of the bus bar and is electrically connected in a housing. After that, the space in the housing is tightly filled with a sealing resin, and then the opening of the housing is hermetically sealed with a lid member. .

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are drawings for explaining a press contact joint connector 10 according to an embodiment of the present invention,
FIG. 1 is an overall perspective view showing an insulation displacement joint connector 10,
FIG. 2- (A) is a plan view of a portion excluding the lid member and the sealing resin for filling as seen from above, FIG. 2- (B) is a longitudinal sectional view, and FIG. 2-C is a lateral sectional view. . FIG. 3 is a perspective view showing the bus bar 11 housed in the housing 1 of the press contact joint connector 10.

This pressure contact joint connector 10 is shown in FIG.
As shown in FIG. 1, a bus bar 11 made of one part is formed by pressing one conductive plate made of metal, and an electrically insulating material (here, plastic) that accommodates and fixes the bus bar 11 inside. It is composed of a housing 1 and a lid member 2 (see FIGS. 1 and 2). Then, in the housing 1, a plurality (here, three) of cores (three in this example) are pressed into the slits 14 of the pressure-contact slit portions 13 of the bus bar 11 and their cores are brought into contact with and electrically connected to the pressure-contact slit portions 13. The covered electric wire 15 is arranged in a penetrating state, and the inner space of the housing 1 is tightly filled with the sealing resin Z. And the upper opening 1 of the housing 1
A is hermetically sealed by the lid member 2. The electric wire 15 housed in the housing 1 in a penetrating state is housed in the groove-shaped internal space 16 between the opposite side wall portions 1 b of the housing 1 in a drawn state.

As shown in FIG. 3, the bus bar 11 is composed of a frame portion 12 and a plurality of pressure contact slit portions 13 which are plate pieces with slits 14 which are vertically raised from the frame portion 12. It is a thing. However, in this press-contact joint connector 10, the covered electric wire 1 is formed by a plurality of press-contact slit parts 13 provided upright from the frame part 12.
5, the plurality of (three in this case) electric wires 15 are sandwiched and supported substantially in parallel along the groove-shaped inner space 16.

A single covered electric wire 15 is supported by a pair of press-contact slit portions 13 sandwiching two portions in different longitudinal directions. The pressure contact slit portions 13 that form a pair that support the same electric wire 15 are arranged apart from each other along the extending direction of the groove-shaped internal space 16. In this bus bar 11, a plurality of pairs of pressure contact slit portions 13 that support the same electric wire 15 are arranged side by side in a direction orthogonal to the extending direction of the covered electric wire 15 (which is substantially the same as the extending direction of the groove-shaped inner space 16). Pairs (specifically, 3 pairs) are arranged. A plurality of electric wires 15 are arranged side by side in the internal space 16, and a pair of press-contact slit portions 13 that support the same electric wire 15 are arranged side by side in a side by side relationship with the electric wires 15. It has become. However, between the pair of pressure contact slit portions 13 that support the adjacent electric wires 15 side by side, the pressure contact slit portions 13 extend in the extending direction of the covered electric wire 15.
The positions of the pressure contact slits 13 are displaced from each other, and a part of the pressure contact slits 13 forming the other pair is inserted between the pressure contact slits 13 forming the other pair. For example,
When the other end side of the groove-shaped internal space 16 in the extending direction is viewed from one end, the adjacent pressure contact slit portions 13 appear to partially overlap with each other. However, in the press-contact joint connector 10, as described above, the plurality of covered electric wires 1 have the structure in which the press-contact slit portions 13 adjacent to each other are staggered so as to partially overlap each other.
The arrangement pitch of 5 can be shortened, and as a result, there is an advantage that the size of the press contact joint connector 10 can be reduced.

The sealing resin Z to be filled in the internal space 16 of the housing 1 has electrical insulation properties, can be easily cured by dry curing, etc., and exhibits water stopping properties after curing. is there. In particular, an adhesive curable by water is preferable, and an adhesive selected from, for example, an epoxy resin adhesive, a cyanoacrylate adhesive, and a silicone adhesive can be used more effectively.

The pressure contact joint connector 10 of the present invention having the above structure is manufactured in the following manner. This will be described with reference to the assembly side sectional view shown in FIG. First, in the housing 1, the bus bar 11
And the slit 1 of each pressure contact slit portion 13 of the bus bar 11
4 and the covered electric wire 15 in which the press contact slit portion 13 is electrically connected to the core wire by press-fitting into the core 4 and sandwiching the core wire, the inner space 16 of the housing 1 is filled with the liquid sealing resin Z. Electric wire 1 for the slit 14 of the pressure contact slit portion 13
Either the press-fitting of 5 or the insertion of the bus bar 11 into the housing 1 may be performed first.

Then, when the filled sealing resin Z is in a soft state before being cured, the lid member 2 is immediately placed in the opening 1a in the upper portion of the housing 1, and the wire pressing claw provided on the lower surface of the lid member 2 is placed. 2a presses the covered electric wire 15 from above into the slit 14 of the press contact slit portion 13 to ensure the press-fit state. At this time, with the insertion of the electric wire pressing claw 2a, the sealing resin Z filled in the housing 1 is spread and expanded to four circles, and the internal space in the housing 1 is tightly filled. At this time, the sealing resin Z overflowing from the housing 1 has openings 17 at both ends in the extending direction of the groove-shaped internal space 16 of the housing 1 (FIGS. 2A, 2B and 4 left and right).
It is also filled in, but in this opening 17, the housing 1
Rib-shaped partition wall 1d raised from the bottom wall 1c of FIG.
A plurality of electric wire holding grooves 1e (see FIG. 2A) partitioned by (A) and the like) and electric wire pressing pieces 2b (FIGS. 1 and 2A) protruding from the lower surface of the lid member 2 are provided. The electric wires 15 housed in the electric wire housing groove 1e are strongly pressed against the housing bottom wall 1c by the electric wire pressing pieces 2b. As a result of the sealing resin Z that has come out being pressed by the electric wire pressing piece 2b, the inside of each electric wire housing groove 1e is sealed by the sealing resin Z without any gaps.

Moreover, this pressure contact joint connector 10
Then, the openings 17 at both ends of the internal space 16 of the housing 1
The side walls 1b and the partition wall 1d of the housing 1 project slightly outward from the end surface 1f of the bottom wall 1c located at,
When the lid member 2 is pushed into the housing 1, a gap between the side walls 1b of the housing 1 and the partition wall 1d protruding from the bottom wall end face 1f to the outside (this portion is an extension of the wire receiving groove 1e). Then, the projection 2c protruding from the wire holding piece 2b is inserted into the wire holding groove 1e, and the wire 15 housed in the wire holding groove 1e is inserted into the projection 2c of the wire holding piece 2b.
From the end of the housing bottom wall 1c located in the opening 17 of the internal space 16 to the end surface 1 of the bottom wall 1c.
It is bent along f and is firmly sandwiched between the projection 2c of the wire pressing piece 2b and the end surface 1f of the bottom wall 2c. Thereby, the internal space 16 of the housing 1
Sealing resin Z overflowing from the wire and entering the electric wire receiving groove 1e
However, the protrusion 2c of the wire pressing piece 2b and the end surface 1f of the bottom wall 1c
It is filled evenly between and with no gaps, and excellent waterproof performance is obtained. Since the wire pressing piece 2b has a shape that is substantially along the end of the housing bottom wall 1c located in the opening 17 of the internal space 16, simply inserting the wire pressing piece 2b into the wire receiving groove 1e The space between the wire pressing piece 2b and the end of the housing bottom wall 1c can be sealed with the sealing resin Z. Note that, with such a configuration, the sealing resin Z that has entered the electric wire accommodation groove 1e is
When the wire is pushed into the housing bottom wall 1c, it is pressed by the wire pressing piece 2b, and the recesses or voids existing in the wire receiving groove 1e are filled so that the wire is reliably filled without any gap. Even if there is an empty electric wire accommodation groove 1e in which 15 is not accommodated, this can be reliably sealed.

The lid member 2 mounted on the housing 1 is shown in FIG.
As shown in FIG. 2, engaging pieces 2d formed at a plurality of peripheral portions
Is locked to the locking piece 1g protruding from the side wall 1b of the housing 1 to maintain the mounted state, so that the sealing resin Z is filled in the housing 1 until the sealing resin Z is cured. The state can be maintained stable.

The pressure-bonded joint connector 10 of the present invention manufactured in this manner is extremely excellent in that it is filled with a sealing resin, particularly a water-curable sealing resin, in the housing 1 and hermetically sealed. In addition to exerting a waterproof effect, the work is simple and can be easily manufactured by automation, which significantly improves the work efficiency. Further, since the inside is filled with the sealing resin, the size can be reduced as compared with the case where the outside is resin-molded, and the cost can be reduced because the mold for resin molding is unnecessary. .
Moreover, since the entire inner side surrounded by the housing 1 and the lid member 2 is tightly filled and sealed with the sealing resin Z without a gap, it is possible to reliably prevent the intrusion of water into the inside, and to obtain excellent waterproofing. The effect can be secured stably over a long period of time.

This type of pressure-welding joint connector is generally removed or replaced when the connection of the electric wire is changed. From the standpoint of preventing easy reuse, there is no need to open and reconnect the internal wires. The cover member 2 of the press-contact joint connector 10 according to the present invention includes the wire pressing claw 2a and the wire pressing piece 2.
Since b is embedded in the sealing resin Z or is in close contact with the sealing resin Z and cannot be opened, it is possible to reliably prevent reuse of the pressure contact joint connector 10 due to carelessness.

Needless to say, the specific structure of the press-contact joint connector and the method for manufacturing the same according to the present invention is not limited to the above-mentioned embodiment, and can be changed as appropriate without departing from the spirit of the invention. For example, the specific shapes and the like of the housing and the lid member that form the pressure contact joint connector can be appropriately changed in design. As the lid member, when the lid member is mounted on the housing, a portion that is inserted into the sealing resin (however, before curing) filled in the housing and pushes the sealing resin to the surroundings (to the inner space of the housing) It is preferable to adopt a configuration having an insertion portion, a protrusion, or the like that enters the inside of the housing) from the viewpoint that a closer filling of the sealing resin can be realized. In this respect, like the above-described embodiment, the present invention is not limited to the configuration including both the electric wire pressing piece and the electric wire pressing piece, and the structure including only one of these, or the electric wire pressing piece and the electric wire pressing piece. It may be configured to have a protrusion different from the above. Further, if the lid member is inserted and fitted into the housing by being inserted into the housing, the entire lid member is filled with the sealing resin (but not cured) already filled in the housing. It functions as an insertion portion that is pushed out to the surroundings into the internal space of the housing.

[0019]

As described above, according to the insulation displacement joint connector and the method of manufacturing the same of the present invention, the sealing resin is provided in the inner space portion of the housing which accommodates the bus bar electrically connected to the covered electric wire. Is tightly filled and is hermetically sealed by the lid member, the insulation slitting function of the busbar pressure contact slit portion and the covered electric wire electrically connected to and connected to this are sealed by the sealing resin. The waterproof effect can be remarkably improved, and the electrical reliability can be improved. In addition, it is possible to assemble simply by simply filling the housing with the sealing resin and then attaching the lid member, which enables automation of manufacturing and ensures higher electrical reliability over a long period of time. Can be manufactured with good work efficiency, and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is an overall perspective view illustrating a press-contact joint connector according to an embodiment of the present invention.

2A and 2B are views for explaining a press-joint joint connector according to an embodiment of the present invention, FIG. 2A is a plan view seen from above without a lid member, and FIG. C)
FIG.

FIG. 3 is a perspective view showing a bus bar applied to the press contact joint connector according to the embodiment of the present invention.

FIG. 4 is an assembled side sectional view for explaining the method for manufacturing the press contact joint connector according to the embodiment of the present invention.

5A and 5B are views for explaining a conventional pressure contact joint connector, in which FIG. 5A is a perspective view of a bus bar, and FIG.
FIG. 3 is a side sectional view of a press-joint joint connector in which the bus bar of FIG.

[Explanation of symbols]

10 ... Pressure contact joint connector of one embodiment of the present invention, 1 ... Housing, 1a ... Opening, 2 ... Lid member, 2a ...
Electric wire pressing claw, 11 ... Bus bar, 12 ... Frame part, 13
... Pressure contact slit part, 14 ... Slit, 15 ... Coated electric wire,
16 ... Space, Z ... Sealing resin.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazuhiro Maeda             1-3 1-3 Hachimanbara, Yonezawa City, Yamagata Prefecture Yonezawa             Electric Wire Co., Ltd. Hachimanbara Office F-term (reference) 5E012 AA08 AA42                 5E051 BA06 BB03 BB05                 5E087 EE11 FF14 LL02 LL14 MM05                       QQ04 RR12

Claims (2)

[Claims] 1. A plurality of press-contact slit portions, each of which has a slit into which a covered electric wire is press-fitted, is cut into a covering of the covered electric wire press-fitted into the slit, and is electrically connected by contacting an inner core wire, A bus bar for electrically connecting the covered electric wires sandwiched between the pressure contact slits and a covered electric wire sandwiched between the pressure contact slits of the bus bar for pressure connection are housed in a housing made of an electrically insulating material. Then, the space in the housing is tightly filled with a sealing resin and hermetically sealed. 2. A plurality of press-contact slit portions, each having a slit into which the covered electric wire is press-fitted, cut into the cover of the covered electric wire press-fitted into the slit, and contacted with an inner core wire to be electrically connected, A bus bar for electrically connecting the covered electric wires sandwiched between the pressure contact slits and a covered electric wire sandwiched between the pressure contact slits of the bus bar for pressure connection are housed in a housing made of an electrically insulating material. Then, a method for manufacturing a press-joint connector, characterized in that the space in the housing is tightly filled with a sealing resin, and then the opening of the housing is hermetically sealed with a lid member.