JPH08303318A - Bus bar for molding connector block for injector and core member - Google Patents

Abstract

PURPOSE: To improve workability and productivity and hold each bus bar in a predetermined posture by a core member. CONSTITUTION: A core member 18 is formed into a thin and long shape which is provided with a plurality of positioning parts 19 which are set to the positioning shape in a molding cavity and are along the longitudinal direction and a connection part 20 which connects each positioning section 19. The core member 18 is provided with a bus bar hold groove 21 which holds each bus bar 17 in a posture in which they are across an interval each other. A wall section of the connection part 20 which faces the bus bar 17 inserted into the bus bar hold groove 21 is provided with a positioning recessed part 20b. When the bus bar 17 is inserted into the bus bar hold groove 21, a coming-off prevention projection 17d which is fitted in and engaged with the positioning recessed part 20b in such a manner that it does not come off is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for molding an injector connector block which is connected across each injector (fuel injection valve) of an internal combustion engine of an automobile or the like and supplies a power source 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, an injector connector block of this type is provided with a connector block body 1 formed in an elongated shape with a heat resistant reinforced hard resin or the like. 1, a plurality of injector connecting portions 2 to which the injectors are connected from below are provided at predetermined intervals in the longitudinal direction.

An external wiring connecting portion 3 to which a connector of a wire harness as an external wiring is laterally connected is provided on one end side in the longitudinal direction of the connector block body 1.

And, in the connector block body 1,
Busbars 4 extending from each injector connection portion 2 to the external wiring connection portion 3 are arranged in an embedded manner, and are configured to supply power to the injectors through each busbar 4 to open / close the injectors.

For example, an injector connector block of this type is disclosed in Japanese Utility Model Publication No. 29494/1994 and Japanese Patent Laid-Open No.
There is one disclosed in JP-A-263913.

When molding the connector block 5, each bus bar 4 is partially embedded and held in a predetermined posture in the primary molding cavity as disclosed in the above publication, and as shown in FIG. The posture holding molding portion 7 that holds each bus bar 4 in a predetermined posture is partially resin-molded (partial molding step).

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

[0008]

However, according to the above method of molding the connector block for the injector,
A partial molding step of holding each bus bar 4 in a predetermined posture,
2 with the overall molding process of molding the connector block body 1
However, there is a problem in that workability and productivity are inferior because an insert molding process is required every time.

In view of the above problems, the present invention is intended for injectors that can be molded by one-time insert molding to improve workability and productivity, and can hold each bus bar in a predetermined posture by the core member. An object is to provide a bus bar and a core member for molding a connector block.

[0010]

[Means for Solving the Problems] A technical means for achieving the above object is to hold a plurality of strip-plate-shaped bus bars by a core member in a predetermined posture with a gap between them, and to hold the core member in the holding state. Is set in the molding cavity, resin is filled in the molding cavity, and a plurality of bus bars are embedded in the elongated connector block body of the resin, with a predetermined interval in the longitudinal direction. Bus bar and core for molding connector block for injector used when molding a connector block provided with a plurality of injector connection parts to which injectors are connected and external wiring connection parts to which external wiring is connected A member,
The core member is formed in an elongated shape including a plurality of positioning portions along the longitudinal direction set in a molding cavity in a positioning manner, and a connecting portion that connects each positioning portion, and the core member includes: A busbar holding groove into which a busbar for holding in a posture with a space is inserted is provided, and a positioning recess is provided in the wall portion of the core member facing the busbar inserted into the busbar holding groove, and the busbar is provided in the busbar. The point is that the positioning recess is provided with a retaining projection that is engaged and locked in the retaining recess when the busbar retaining groove is inserted.

Further, the retaining protrusion of the bus bar may be formed by cutting and raising a part of the bus bar.

Further, the connecting portion of the core member may be provided with the positioning recess.

[0013]

According to the present invention, each bus bar is inserted into the bus bar holding groove provided in the core member in advance, and each bus bar is held in a predetermined posture with a gap between them, and in that state. After setting to the predetermined position of the molding cavity of the molding die, resin can be filled into the molding cavity to mold the connector block, and the insert molding process for molding the connector block is performed once, resulting in workability and production. And the production cost of the connector block can be reduced.

Moreover, the positioning of the core member can be easily performed with respect to the molding cavity.

Further, the core member is provided with a busbar holding groove into which the busbar is inserted, the wall is provided with a positioning recess, and each busbar is fitted in the positioning recess in a slip-out preventing projection. When each bus bar is inserted into the bus bar holding groove of the core member, the retaining projection of the bus bar is fitted and locked in the positioning recess in a retaining manner so that each bus bar has a predetermined shape. It can be held in a good position in a posture.

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

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

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

[0019]

DETAILED 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, 10 is a connector block for an injector used in an automobile engine,
A connector block body 11 formed in an elongated shape with heat-resistant reinforced hard resin (for example, polybutylene terephthalate containing 30% of glass fiber) is provided, and the lower surface side of the connector block body 11 has a predetermined interval in the longitudinal direction thereof. And a plurality of injector connection portions 12 are integrally provided. In this embodiment, the connector block 10 is for an in-line 4-cylinder engine.

As shown by each arrow P in FIG. 1, an injector (not shown) is detachably connectable to each injector connecting portion 12 from the lower side.

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

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

Then, in the connector block body 11, each injector connecting portion 12 to the harness connecting portion 13 is provided.
The strip plate-shaped bus bars 17 leading up to are respectively arranged in an embedded manner, and the power is selectively supplied to each injector through the wire harness and each bus bar 17, and the injector is selectively opened / closed so that the fuel is supplied to the engine side. Is configured to supply.

Further, each bus bar 17 has a male tab 17a as a connecting terminal portion arranged in the harness connecting portion 13 in an exposed end portion and a connecting terminal portion arranged in the injector connecting portion 12 in an exposed end portion. The male tab 17b and the linear connecting portion 1 for connecting the male tabs 17a and 17b to each other.
7c, each male tab 17b is appropriately bent and formed so that each pair of male tabs 17b located in each injector connection portion 12 are arranged in a line.

Further, the male tabs 17a are appropriately bent so that the male tabs 17a located in the harness connecting portion 13 are also arranged in a line.

Further, in FIGS. 3 to 10, reference numeral 18 denotes a core member made of 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. The structure is provided with a plurality of positioning parts 19 that are set in a shape along the longitudinal direction, and a connecting part 20 that connects the positioning parts 19 to each other.

The core member 18 includes the bus bars 1
A busbar holding groove 21 into which 7 is inserted from above is provided over each positioning portion 19 and the connecting portion 20, and the busbar 1 inserted into the busbar holding groove 21 is provided.
As shown in FIGS. 5 to 10, each of the wall portions 20a of the connecting portion 20 which faces 7 has a rectangular positioning recess 20b.
Are appropriately provided.

Further, the positioning portion 19 of the core member 18 is provided with a positioning projection 26 and a positioning recess 27 so as to be positioned in a molding cavity 25 composed of a molding upper mold 23 and a molding lower mold 24. As in the past, it is properly provided.

On the other hand, the connecting portion 17c of each bus bar 17
At a position corresponding to the positioning recess 20b of the core member 18 in the above, when the connecting portion 17c is inserted into the bus bar holding groove 21, the retaining projection is fitted into the positioning recess 20b and locked in a retaining shape. The portion 17d is formed by cutting and raising the upper side to one side.

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

Each bus bar 1 corresponding to the bus bar holding groove 21 provided in the core member 18 formed by resin molding in advance.
If the connecting portions 17c of the bus bar 17 are inserted, the retaining projections 17d of the bus bar 17 will be elastically restored by the retaining protrusions 17d, as shown in FIG. 8 and FIG.
It is possible to obtain a state in which it is fitted in the positioning recess 20b of No. 8 and is locked in a retaining shape. Here, as shown in FIG. 4, it is possible to obtain a state in which the busbars 17 are held by the core member 18 in a predetermined posture with a predetermined distance from each other.

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

It should be noted that the injection-filled resin and the resin forming the core member 18 are similar resins from the viewpoint of adhesion, and the injection-filled resin is particularly the heat-resistant reinforced hard resin. There is.

As described above, according to this embodiment,
The connecting portions 17c of the busbars 17 are inserted into the busbar holding grooves 21 provided in the core member 18, and the busbars 17 are held by the core member 18 in a predetermined posture with a gap therebetween, and in that state After the child member 18 is set at a predetermined position of the molding cavity 25 composed of the upper molding die 23 and the lower molding die 24, the resin is injected and filled into the molding cavity 25 to mold the connector block 10. The insert molding step for molding the block 10 is performed once, workability and productivity can be improved, and the production cost of the connector block 10 can be reduced.

The wall portion 2 of the connecting portion 20 of the core member 18
0a is provided with a positioning recess 20b, and each bus bar 17
Each of the bus bars 17 has a structure in which a retaining projection 17d that is engaged with and locked in the positioning recess 20b is retained.
When the is inserted into the bus bar holding groove 21 of the core member 18, the retaining projection 17d of the bus bar 17 is aligned with the positioning recess 20b.
Since it is fitted and locked in a slip-out state, the relative displacement between the core member 18 and each bus bar 17 can be effectively prevented,
Each bus bar 17 is favorably held by the core member 18 in a predetermined posture in a positioning manner. Therefore, this positioning recess 20
Even if the numbers of b and the retaining projections 17d are relatively small, a good positioning effect can be exhibited.

At this time, as shown in FIGS. 13 and 14, a protrusion 41 which bulges in a spherical shape is provided on one side surface of the bus bar 40, and the bus bar holding groove 43 formed in the core member 42 cannot be forced. If the structure is such that 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. Due to the deformation, a larger insertion force is required when inserting the bus bar 40 into the adjacent bus bar holding groove 43. And the core member 42 may be further deformed by the insertion of the plurality of bus bars 40.

On the other hand, in this embodiment, the retaining projection 17d is cut and raised on the bus bar 17, and the retaining projection 17d is engaged with the core member 18 in a retaining manner and positioned. The structure is provided with a recess 20b,
There is no risk of holding the bus bar 17 while the core member 18 is deformed by the insertion of the bus bar 17 into the bus bar holding groove 21, and therefore the insertion force does not increase when another bus bar 17 is inserted into the adjacent bus bar holding groove 21. Here, the deformation of the core member 18 can be effectively prevented and the bus bar 1 with respect to the bus bar holding groove 21 can be effectively prevented.
The insertion force of the bus bar 17 can be reduced and the insertion work of the bus bar 17 can be facilitated.

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

When the retaining projections 17d are fitted and locked in 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 portion,
The bus bars 17 themselves are easily elastically deformed, and the work of mounting each bus bar 17 on the core member 18 can be performed more easily.

Further, the retaining projection 1 of each bus bar 17
7d has 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.
Since the positioning recesses 27 are provided, there is an advantage that positioning with respect to the molding cavity 25 can be easily performed.

Although the connector block 10 for an in-line four-cylinder engine is shown in the above embodiment,
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 body 11 is shown, it may be a separate structure as in the conventional case.

Further, in the above embodiment, the structure in which the positioning recess 20b is provided in the connecting portion 20 is shown in FIG.
As shown in FIG. 1 and FIG. 12, the positioning recess 1 is formed in the wall portion 19a of the positioning portion 19 facing the bus bar holding groove 21.
9b, and the retaining protrusion 17d may be provided 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 of the present invention, the core member is provided with a plurality of members along the longitudinal direction which are set in the molding cavity in a positioning manner. A busbar holding groove that is formed in an elongated shape and that has a positioning portion and a connecting portion that connects the positioning portions, and in which a busbar for holding a plurality of busbars in a posture in which the busbars are spaced from each other is inserted in the core member. And a positioning recess is provided in a wall portion of the core member facing the bus bar inserted into the bus bar holding groove, and when the bus bar is inserted into the bus bar holding groove, the positioning recess is fitted into the positioning recess. It is equipped with a retaining projection that is engaged with each other, and the insert molding process for molding the connector block is performed once by using the core member, And improvement in productivity Hakare, production cost of the connector block is an advantage that attained.

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

Further, the core member is provided with a busbar holding groove into which the busbar is inserted, the wall portion is provided with a positioning recess, and each busbar is retained in the positioning recess in a retaining projection so as to be retained. When each bus bar is inserted into the bus bar holding groove of the core member, the retaining projection of the bus bar is fitted and locked in the positioning recess in a retaining manner so that each bus bar has a predetermined shape. There is an advantage that it can be satisfactorily held in the positioning state in the posture.

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

If the retaining protrusion 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 the positioning recess, the positioning recess can be easily molded.

[Brief description of 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 dispersed 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 the core member.

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

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

7 is a sectional view taken along line VII-VII in FIG.

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

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

FIG. 10 is a cross-sectional view of an essential part showing a state where the bus bar is inserted in a core member.

FIG. 11 is a side view of essential parts showing a step of inserting a bus bar into a core member according to another embodiment.

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

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

FIG. 14 is a main-portion cross-sectional view 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 where 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 Detach prevention projection part 18 Core member 19 Positioning part 20 Connecting part 20a Wall part 20b Positioning recess 21 Busbar holding groove 25 Molding cavity 26 Positioning projection 27 Positioning recess

Claims (3)

[Claims] 1. A plurality of strip-shaped bus bars are held by a core member in a predetermined posture with a space therebetween, 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 are embedded in a connector block body formed of resin in an elongated shape, and a plurality of injector connecting portions to which injectors are connected with a predetermined interval in the longitudinal direction, and external wiring. A bus bar and a core member for molding a connector block for an injector, which is used when molding a connector block provided with an external wiring connection part to which the core member is positioned in a molding cavity. Is formed in an elongated shape having a plurality of positioning portions along the longitudinal direction set to, and a connecting portion that connects each positioning portion, A bus bar holding groove into which a bus bar for holding in a holding posture is inserted is provided, and a positioning recess is provided in a wall portion of the core member facing the bus bar inserted into the bus bar holding groove, and the bus bar is provided with the bus bar. A bus bar and a core member for forming a connector block for an injector, characterized in that the positioning recess has a retaining projection that is engaged and locked in a retaining shape when inserted into the holding groove. 2. The busbar and core member for molding a connector block for an injector according to claim 1, wherein the retaining projection of the busbar is formed by cutting and raising a part of the busbar. 3. The bus bar and core member for molding the connector block for an injector according to claim 1, wherein the positioning recess is provided in the connecting portion of the core member.