JP2874588B2 - Busbar and core member for molding connector block for injector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used to form an injector connector block which is connected across injectors (fuel injection valves) of an internal combustion engine of an automobile or the like and supplies power for operating each injector. The present invention relates to a bus bar and a core member for molding an injector connector block.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 15 to 17, this type of connector block for an injector has a connector block body 1 formed into an elongated shape with a heat-resistant hardened resin or the like. 1 is provided with a plurality of injector connection portions 2 to which injectors are connected from the lower side at predetermined intervals in the longitudinal direction.

An external wiring connection portion 3 is provided at one end of the connector block body 1 in the longitudinal direction, to which a connector of a wire harness as external wiring is connected from the side.

In the connector block body 1,
Busbars 4 extending from the respective injector connection parts 2 to the external wiring connection part 3 are respectively provided in an embedded manner, and power is supplied to the injectors via the respective busbars 4 to open and close the injectors.

For example, Japanese Unexamined Patent Publication No. Hei 6-29494 and Japanese Unexamined Patent Publication No.
-263913.

When the connector block 5 is molded, as shown in the above-mentioned publication, each bus bar 4 is partially buried and held in a predetermined posture in a primary molding cavity, as shown in FIG. Then, the posture holding molding part 7 for holding each bus bar 4 in a predetermined posture is partially resin-molded (partial molding step).

Next, after inserting a group of bus bars 4 held in a predetermined posture by the posture holding / molding section 7 into predetermined positions in the secondary molding cavity, resin is filled in the secondary molding cavity, and FIG. As shown in (1), a connector block 5 having a connector block main body 1 having a desired shape was molded (entire molding step).

[0008]

However, according to the above-described method for forming a connector block for an injector,
A partial molding step of holding each bus bar 4 in a predetermined posture;
2 for the entire molding step of molding the connector block body 1
This requires a large number of insert molding steps, resulting in poor workability and productivity.

In view of the above problems, the present invention aims at improving workability and productivity by being able to be formed by one insert molding, and at the same time, it is possible to maintain each bus bar in a predetermined posture by a core member. It is an object to provide a bus bar and a core member for molding a connector block.

[0010]

A technical means for achieving the above object is to hold a plurality of strip-shaped busbars in a predetermined posture at a distance from each other by a core member, and to hold the core member in the held state. Is set in the molding cavity, the resin is filled into the molding cavity, and a plurality of busbars are embedded in the connector block body formed into an elongated shape with the resin, and have a predetermined interval in the longitudinal direction. Bus bar and core for molding a connector block for an injector used when molding a connector block provided with a plurality of injector connection portions to which an injector is connected and an external wiring connection portion to which external wiring is connected A member,
The core member is formed in a slender shape having a plurality of positioning portions along the longitudinal direction set in the molding cavity in a positioning manner, and a connecting portion for connecting the respective positioning portions. A bus bar holding groove into which a bus bar for holding in a posture having an interval is inserted is provided, and a positioning recess is provided on a wall portion of a core member facing the bus bar inserted into the bus bar holding groove, and a bus bar is provided on the bus bar. The positioning protrusion is provided so as to be fitted and locked in the positioning recess in a retaining shape when inserted into the bus bar holding groove.

[0011] The retaining projection of the bus bar may have a structure in which a part of the bus bar is cut and raised.

Further, a structure may be provided in which the positioning concave portion is provided at a connecting portion of the core member.

[0013]

According to the present invention, each bus bar is inserted in advance into a bus bar holding groove provided in the core member, and each bus bar is held in a predetermined posture with an interval therebetween. Is set at a predetermined position in the molding cavity of the molding die, and then the resin is filled into the molding cavity to form the connector block. The insert molding process for molding the connector block is performed once, thereby improving workability and production. And the production cost of the connector block can be reduced.

Further, the positioning with respect to the molding cavity can be easily performed by the respective positioning portions of the core member.

Further, the core member is provided with a bus bar holding groove into which the bus bar is inserted, a positioning recess is provided in the wall portion, and each bus bar is provided with a retaining projection which is fitted and locked in the positioning recess in a locking manner. When each bus bar is inserted into the bus bar holding groove of the core member, the retaining protrusion of the bus bar is fitted and locked in the positioning recess in a locking manner, and each bus bar is fixed to the core member at a predetermined position. It is satisfactorily held in the posture in the posture.

In this case, since the retaining projection is fitted and locked in the positioning recess, deformation of the core member can be effectively prevented, and the bus bar can be easily inserted into the bus bar holding groove.

Further, if the retaining projection of each bus bar has a structure formed by cutting and raising a part of the bus bar,
The retaining projection can be easily formed.

Further, if the connecting portion of the core member is provided with a positioning recess, the positioning recess can be easily formed.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 to 10, reference numeral 10 denotes a connector block for an injector used in an automobile engine.
A connector block main body 11 formed in an elongated shape with a heat-resistant hardened resin (for example, polybutylene terephthalate containing 30% of glass fiber) or the like is provided. And a plurality of injector connection parts 12 are integrally provided. In the present embodiment, the connector block 10 is used for an in-line four-cylinder engine.

As shown by arrows P in FIG. 1, an injector (not shown) is configured to be detachably connected to each injector connecting portion 12 from below.

On the upper surface side of the connector block body 11, a connector of a wire harness as an external wiring (not shown) is detachably connected from the upper side as shown by an arrow Q at an intermediate portion in the longitudinal direction thereof. A harness connection 13 as a possible external wiring connection is provided integrally.

In this embodiment, a fuel supply passage 15 for supplying fuel to each injector is provided integrally with the connector block main body 11 along its longitudinal direction.

In the connector block main body 11, each of the injector connection sections 12 is connected to a harness connection section 13.
The bus-bars 17 are arranged in an embedded manner, and selectively supply power to each injector through the wire harness and each bus bar 17 to selectively open and close the injectors, thereby providing fuel to the engine side. Is provided.

Each of the bus bars 17 has a male tab 17a as a connection terminal portion disposed at the end of the harness connection portion 13 and a connection terminal portion disposed at the end of the injector connection portion 12 at the end. Male tab 17b, and strip-shaped linear connecting portion 1 that connects each male tab 17a, 17b.
7c, and each male tab 17b is appropriately bent and formed such that the pair of male tabs 17b located in each injector connection portion 12 are arranged in a line.

Further, each male tab 17a is appropriately bent so that each male tab 17a located at the harness connection portion 13 is also arranged in a line.

3 to 10, reference numeral 18 denotes a core member made of a heat-resistant hard resin or the like for holding each bus bar 17 in a predetermined posture, which is formed in an elongated shape and positioned in the molding cavity 25. It has a plurality of positioning parts 19 set in a longitudinal direction and a connecting part 20 connecting the positioning parts 19 to each other.

The core member 18 is provided with each bus bar 1.
A busbar holding groove 21 into which the busbar 7 is inserted from above is provided over each of the positioning portions 19 and the connecting portions 20, and the busbar 1 inserted into the busbar holding groove 21 is provided.
As shown in FIGS. 5 to 10, a rectangular positioning recess 20b is formed on the wall 20a of the connecting portion 20 facing
Is provided as appropriate.

Further, in the positioning portion 19 of the core member 18, a positioning projection 26 and a positioning recess 27 are provided so as to be positioned in a molding cavity 25 formed by an upper molding die 23 and a lower molding die 24. Like the conventional case, it is provided appropriately.

On the other hand, the connecting portion 17c of each bus bar 17
In the positions corresponding to the positioning recesses 20b of the core member 18, when the connecting portions 17 c are respectively inserted into the bus bar holding grooves 21, the retaining protrusions which are fitted into the positioning recesses 20 b and are locked in a retaining shape. The portion 17d is formed by cutting and raising the upper side so as to protrude to one side.

Next, each of the bus bars 17 and the core member 1
A method of forming the connector block 10 using the connector 8 will be described.

Each of the bus bars 1 corresponding to the bus bar holding groove 21 provided in the core member 18 formed in advance of resin is provided.
7 is inserted, the elastic projection of the retaining projection 17d causes the retaining projection 17d of the bus bar 17 to move into the core member 1 as shown in FIGS.
8 is fitted to the positioning recess 20b and locked in a retaining shape. Here, as shown in FIG. 4, a state is obtained in which the bus bars 17 are held by the core member 18 in a predetermined posture having a predetermined interval from each other.

Next, after the core member 18 in which each bus bar 17 is held in a predetermined posture is set at a predetermined position in the molding cavity 25, resin is injected and filled into the molding cavity 25, as shown in FIG. A suitable connector block 10 is formed.

The injection-filled resin and the resin constituting the core member 18 are made of the same type of resin from the viewpoint of adhesion. In particular, the injection-filled resin is the heat-resistant hardened resin. I have.

As described above, according to the present embodiment,
The connecting portions 17c of the respective bus bars 17 are inserted into the bus bar holding grooves 21 provided in the core member 18, respectively, so that the core members 18 hold the respective bus bars 17 in a predetermined posture with an interval therebetween. After setting the slave member 18 at a predetermined position of the molding cavity 25 formed by the upper molding die 23 and the lower molding die 24, the resin may be injected into the molding cavity 25 to form the connector block 10. The insert molding step for molding the block 10 is performed once, thereby improving workability and productivity, and reducing the production cost of the connector block 10.

The wall 2 of the connecting portion 20 of the core member 18
0a is provided with a positioning recess 20b.
Each of the bus bars 17 is provided with a retaining projection 17d which is fitted and locked in the positioning recess 20b in a retaining shape.
Is inserted into the bus bar holding groove 21 of the core member 18, the retaining projection 17 d of the bus bar 17 is
And the bus bar 17 can be effectively prevented from being displaced relative to each other.
Each bus bar 17 is satisfactorily held in a predetermined posture by the core member 18 in a predetermined posture. Therefore, this positioning recess 20
Even if the number of b and the retaining projection 17d is relatively small, a good positioning effect can be exhibited.

At this time, as shown in FIGS. 13 and 14, the bus bar 40 is provided with a protruding portion 41 which protrudes spherically on one side surface thereof, and cannot be fitted into the bus bar holding groove 43 formed in the core member 42. If the bus bar 40 is inserted into the bus bar holding groove 43, the core member 42 may be deformed by the insertion of the bus bar 40 into the bus bar holding groove 43, and the deformation may cause a larger insertion force when the bus bar 40 is inserted into the adjacent bus bar holding groove 43. Is required, and the core member 42 may be more deformed due to the insertion of the plurality of bus bars 40.

On the other hand, in the present embodiment, the retaining projection 17d is cut and raised on the bus bar 17, and the retaining projection 17d is fitted and locked in the core member 18 in a retaining shape. A structure provided with a recess 20b,
By inserting the bus bar 17 into the bus bar holding groove 21, there is no risk of holding the bus bar 17 while the core member 18 is deformed, so that the insertion force when inserting another bus bar 17 into the adjacent bus bar holding groove 21 does not increase. Here, the deformation of the core member 18 can be effectively prevented and the bus bar 1
7, the insertion force of the busbar 17 can be reduced.

At this time, the positioning recess 20b is formed in the connecting portion 20.
The positioning recess 20b can be easily formed, and the wall portions 20 on both outer side surfaces of the connecting portion 20 are provided.
a, the positioning recesses 20b are formed respectively, and the retaining projections 17d for the positioning recesses 20b are formed.
There is an advantage that the fitting and locked state of the can be easily visually recognized.

When the retaining projection 17d is fitted and locked to the positioning recesses 20b formed on both outer surfaces of the connecting portion 20, the other side surface of the bus bar 17 is a space.
The elastic deformation of the bus bar 17 itself is also facilitated, and the work of attaching each bus bar 17 to the core member 18 can be performed more easily.

Furthermore, the retaining projections 1 of each bus bar 17
7d is a structure in which a part of the bus bar 17 is cut and raised, and has an advantage that the retaining projection 17d can be easily formed.

The core member 18 is provided with a positioning projection 26.
And the positioning recess 27, there is an advantage that the positioning with respect to the molding cavity 25 can be easily performed.

In the above embodiment, the connector block 10 for an in-line four-cylinder engine is shown.
The number of cylinders is not limited at all. Further, although the structure in which the fuel supply passage 15 is integrally provided in the connector block main body 11 is shown, a separate structure may be used as in the related art.

In the above embodiment, the structure in which the positioning recess 20b is provided in the connecting portion 20 is shown.
As shown in FIG. 1 and FIG. 12, a positioning recess 1 is formed in a wall portion 19a of the positioning portion 19 facing the bus bar holding groove 21.
9b, and a structure having a retaining projection 17d at a corresponding position of the bus bar 17.

[0044]

As described above, according to the bus bar and the core member for molding the connector block for the injector according to the present invention, the core member is provided in the molding cavity in a plurality of lengthwise directions. A busbar holding groove formed in an elongated shape having a positioning portion and a connecting portion for connecting each positioning portion, and into which a busbar for holding a plurality of busbars in a spaced-apart posture in the core member is inserted. A positioning recess is provided on a wall of the core member facing the bus bar inserted into the bus bar holding groove, and the bush is fitted into the bus bar holding groove in a locking manner when inserted into the bus bar holding groove. It is provided with a retaining projection to be engaged and locked, and the insert molding step for molding the connector block by using the core member is performed once, thus And improvement in productivity Hakare, production cost of the connector block is an advantage that attained.

Further, there is an advantage that the positioning with respect to the molding cavity can be easily performed by each positioning portion of the core member.

Further, the core member is provided with a bus bar holding groove into which the bus bar is inserted, and a positioning recess is provided in the wall portion. When each bus bar is inserted into the bus bar holding groove of the core member, the retaining protrusion of the bus bar is fitted and locked in the positioning recess in a locking manner, and each bus bar is fixed to the core member at a predetermined position. There is an advantage that it can be favorably held in a positioning manner in the posture.

In this case, since the retaining projection is fitted and locked in the positioning recess, deformation of the core member can be effectively prevented, and the bus bar can be easily inserted into the bus bar holding groove. There is.

Also, if the retaining projection of each bus bar is formed by cutting and raising a part of the bus bar,
There is an advantage that the retaining projection can be easily formed.

Further, if the connecting portion of the core member is provided with a positioning recess, there is an advantage that the positioning recess can be easily formed.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing a connector block according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a dispersion state of the bus bar.

FIG. 3 is a perspective view showing a state where the bus bar is inserted into a core member.

FIG. 4 is a perspective view showing a state where the bus bar is inserted over a core member.

FIG. 5 is a half enlarged front view of the core member.

FIG. 6 is a partially enlarged front view showing a step of inserting the bus bar into a core member.

FIG. 7 is a sectional view taken along line VII-VII of FIG. 6;

FIG. 8 is a cross-sectional view showing a state where the bus bar is inserted into a core member.

9 is a fragmentary cross-sectional view showing a step of inserting a bus bar into a core member, taken along the line IX-IX in FIG. 5;

FIG. 10 is a fragmentary cross-sectional view showing a state where the bus bar is inserted into a core member.

FIG. 11 is a main part side view showing a step of inserting a bus bar into a core member in another embodiment.

FIG. 12 is a fragmentary cross-sectional view showing a state where the bus bar is inserted into a core member.

FIG. 13 is a fragmentary cross-sectional view showing a step of inserting a bus bar as a comparative example into a core member.

FIG. 14 is a cross-sectional view of a main part showing a state where a bus bar as a comparative example is inserted into a core member.

FIG. 15 is a perspective view of a connector block showing a conventional example.

FIG. 16 is a perspective view showing the bus bar.

FIG. 17 is a perspective view showing a state in which the bus bar is held by a posture holding molding unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Connector block 11 Connector block main body 12 Injector connection part 13 Harness connection part 17 Bus bar 17d Retaining protrusion 18 Core member 19 Positioning part 20 Connecting part 20a Wall part 20b Positioning recess 21 Bus bar holding groove 25 Molding cavity 26 Positioning protrusion 27 Positioning recess

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F02M 51/06 B29C 33/12 F02M 61/16 B29B 11/04

Claims (3)

(57) [Claims] 1. A plurality of strip-shaped busbars are held by a core member in a predetermined posture with an interval between them, the core member in the held state is set in a molding cavity, and resin is filled in the molding cavity. A plurality of bus bars embedded in a connector block main body formed into an elongated shape with resin, a plurality of injector connection portions to which injectors are connected at predetermined intervals in a longitudinal direction thereof, and external wiring. A bus bar and a core member for molding a connector block for an injector used when molding a connector block provided with an external wiring connection portion to which the core member is positioned. It is formed in an elongated shape having a plurality of positioning portions along the longitudinal direction set in the, and a connecting portion connecting each positioning portion, the core member, the interval A bus bar for holding a bus bar for holding the bus bar in a holding posture is provided; a positioning recess is provided on a wall of the core member facing the bus bar inserted into the bus bar holding groove; A bus bar and a core member for forming a connector block for an injector, wherein a retaining projection is provided which is fitted and locked in a retaining shape when inserted into the holding groove. 2. A bus bar and a core member for forming a connector block for an injector according to claim 1, wherein the retaining projection of the bus bar is formed by cutting and raising a part of the bus bar. 3. A bus bar and a core member for molding a connector block for an injector according to claim 1, wherein the positioning recess is provided in a connection portion of the core member.