JP2988610B2 - Connector block for injector of internal combustion engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector block for an injector of an internal combustion engine used to connect a power supply for operating the injector to the injector of the internal combustion engine such as an automobile.

[0002]

2. Description of the Related Art Referring to FIGS.
29494), Injector connector block a
Has a plurality of injector connection portions d arranged in a required number at a required interval on a rod-shaped main trunk portion c made of a heat-resistant hard resin having a wire harness connector b integrally molded at one end. Have tab-shaped terminals e ₁ and e connected to the wire harness connector b and the injector connection portion d, respectively.
A plurality of busbars e exposing ₂ are embedded by insert molding (see FIG. 23).

That is, a tab-shaped terminal e ₁ protruding from one end of the bus bar e is housed in the connector b, and a tab-shaped terminal e ₂ erected in the middle via a branch conductor e ₃ is connected to the main trunk c. The injector connecting portions d, which are integrally formed, bulge to the side and open downward, are exposed from the inside of the center of each of the injector connection portions d having a cap shape, are arranged and fixed in a posture facing downward. Then, the tab-shaped terminal e ₂ in the injector connection portion d
We are exposed to protrude downward from the upper portion of the relay terminal insertion hole f (see FIG. 25), and inserting the relay terminal g having a female contact portion g ₁ on both sides thereof the relay terminal insertion hole f Te, and the other side by connecting to the tab-shaped terminal i projecting from the injector h with connecting one side of the relay terminal g to the tab-shaped terminal e _2, has granted the power injector h (Fig. 24
reference). In addition, the code | symbol j is packing for waterproofing.

[0004]

In the above prior art [0005] the tab-shaped terminal e ₂ provided upright on the bus bar e via an intermediate branch conductive portion e _3, at the time of insert molding of the injector connector block a In such a case, the mutual pitch may be shifted due to thermal deformation, and the tab-shaped terminals e ₂ in the plurality of injector connection portions d connected to the main trunk portion made of a hard material are arranged at the same pitch as the plurality of opposed injectors h. As described above, the dimensional accuracy is strictly required. If the pitch shift causes an error in the pitch between the injector connecting portions d, the injector connector block a cannot be coupled to the injector h group. There is.

Further, in the above conventional art, since the provided tab-shaped terminal e ₂ through the branch conductive portion e ₃ to the busbar e, the yield of the bus bar material is extremely poor, there is a drawback that a high cost . The present invention has been made by paying attention to the above points, and a pair of injector connection terminals are provided in an injector connection portion by insert molding, and provided in the injector connection terminal and a wire harness connector by insert molding. An object of the present invention is to provide an injector connector block in which a connector terminal is connected by an electric wire, thereby eliminating a pitch deviation between injector connection portions and easily managing dimensional accuracy.

[0006]

In order to achieve the above-mentioned object, an injector connector block for an internal combustion engine according to the present invention has a wire harness connector and a plurality of injector connection portions integrally formed of a heat-resistant synthetic resin material. With
In a molded base in which a wire harness connection terminal in the wire harness connector and an injector connection terminal in the plurality of injector connection portions are provided by insert molding, a press-fit wire connection portion of the wire harness connection terminal. A wire is routed between the press-connecting wire connection portion of the injector connection terminal and a heat-resistant synthetic resin coating provided on the wire between the wire harness connector and the injector connection portion. .

[0007]

A plurality of injector connection portions can be simultaneously attached to and detached from the opposed injectors.

[0008]

FIG. 1 shows a connector block for an injector.
A is one end of a rod-shaped main body 1 made of heat-resistant hard synthetic resin.
Supply power from a wire harness (not shown)
Harness connector A for receiving₀Having
Both bulge to one side in the direction of extension of the main trunk 1 and have equal intervals.
6 injector contacts that open downward in a cap shape
Connection A₁, A_Two, A_Three, A_Four, A_Five, A₆Each
Injector connection A ₁, A_Two, A_Three, A_Four, A_Five, A₆
Is the injector D of the opposed internal combustion engine₁,
D_Two, D_Three, D_Four, D_Five, D₆Are fitted and connected.

FIG. 5 shows a molded base A 'of the injector connector block A. On the upper surface of the molded base A', each of the injector connecting portions A _{1 to} A from the wire harness connector A ₀ along the main trunk 1. An electric wire routing concave portion 2 communicating with the concave portion 2 'of ₆ is formed.

[0010] The primary insert molding by the male tab-shaped terminal 3a to the wire harness connector A ₀ is seven wire harness connection terminals 3 in the partition wall 4 is provided exposed in the hood 5 (see FIG. 6 At the rear end, a press-contact type electric wire connection portion 3b having an L-shape and having a conductor press-contact groove 3c is continuously provided.

A pair of injector connecting terminals 6 and 6 'are fixed in the partition 7 by primary insert molding in the recesses 2' of the _six injector connecting portions A _{1 to} A ₆ to form male tab terminals 6a. , cavity R for connection which is open downwardly in the 6a 'male housing 8, exposed to the inside of R _1,
A press-fit type electric wire connection portion 6 having conductor press-contact grooves 6c, 6c '
b, 6b 'are exposed in the recess 2' on the partition 7 (see FIG. 4).

[0012] In the wire-installing recess 2 of the main trunk 1, a plurality of electric wires guide grooves 9a by the wire guide rail 9 from the connector A ₀ for wire harness toward the third injector connecting portions A ₃ is formed, other wire guide pin 10 in the recess 2 'of the wire-installing recessed portion 2 injector connecting portions a ₁ to a ₆ are projected in.

In the wire arranging recess 2, a common circuit wire B is provided on one side, and a first dedicated circuit wire B ₁ , a second dedicated circuit wire B ₂ , The third dedicated circuit wire B ₃ , the fourth dedicated circuit wire B ₄ , the fifth dedicated circuit wire B _5, and the sixth dedicated circuit wire B ₆ are connected to the wire guide groove 9 a or the wire guide groove 9 a and the wire guide pin 10. Has been routed by. The ends of the electric wires B and B _{1 to} B ₆ are the press-contact electric wire connection portions 3 b of the corresponding wire harness connection terminals 3.
(See FIG. 6).

[0014] common circuit wires B is laid along the outer wall 11 of the recess 2, pressed against the pressure-contact wire connecting portion 6b of the injector connecting terminals 6 of the common circuit in the recess 2 'of the injector connecting portions A ₁ Wire guide pin 10 after connection
'Bypass outwardly along the injector connecting terminals 6 of the dedicated circuit' bulging outer wall 11 by being laid again along the outer wall 11 through the outer injector connecting portion A ₂ in the same manner to A ₅ is connected to the injector connection terminals 6 of the common circuit in (see FIG. 7), terminate in a state of being pressed connected to the injector connection terminals 6 of the common circuit in the last injector connecting portion a _6.

[0015] The first dedicated circuit wires B ₁ represents connected by press-fitting the conductive pressure contact groove 6c 'in the' pressure-contact wire connecting portion 6b of the 'injector connecting terminals 6 of the dedicated circuits of the injector connecting portions A ₁ (FIG. 8), and the second to sixth dedicated circuit wires B _{2 to} B ₆ are similarly connected to the injector connection portions A _{2 to} A _6.
Are connected to the press-connecting-type electric wire connecting portion 6b 'of the injector connecting terminal 6' of the dedicated circuit.

As described above, the molded base body in which the wires B, B _{1 to} B ₆ are routed between the wire harness connection terminal 3 and the injector connection terminals 6, 6 'in the wire routing recesses 2, 2'. A ′ is then subjected to secondary insert molding on the heat-resistant hard synthetic resin material P to obtain an injector connector block A (see FIGS. 1, 2 and 3). Coating layer 12 of heat-resistant hard plastic material P around the 'molding substrate A from' wire-installing recess 2, 2 are formed by second-order insert molding, the hood 5 is formed in the wire harness connector A ₀ around the Rutotomoni injector connecting portions a ₁ to a ₆ of the male housing portion 8 hood 14 is formed at intervals 13 to enter the female housing.

In the above configuration, at the time of use, the relay terminals 15, 15 having the female terminals 15a, 15b at both ends are fitted into the connection cavities R, R 'to use one of the female terminals 15
a, 15a of the male tab-shaped terminal 6a, leave connected 6a ', in the injector D ₁ to D ₆ of the internal combustion engine the male housing 8 of the injector connecting portion A ₁ to A ₆ in the injector connector block A in this state female terminal 15b of the fitted relay terminal 15, 15 in the female housing 16, the male terminals 15b and the injector D ₁ to D ₆ 1
7 and 17 (see FIGS. 2, 3, 9, and 10). Reference numeral 18 denotes a waterproof seal packing that is fitted to the outer periphery of the male housing 8 in advance.

In the structure shown in FIG. 11, the wire guide rails 9 are provided in the wire arranging recesses 2 and 2 'of the molded base A ".
And the wire guide pins 10 are omitted, while the male housing 8
Half body 5a of the hood 5 is formed in the connector A ₀ wire harness with the hood 14 is formed around the.

[0019] In this case, the wire harness connecting the terminal 3 the injector connection terminal 6, 6 'the a similar wire to B, B ₁ .about.B ₆ a post-wiring, wire-installing recess 2, 2'
The wires B, B _{1 to} B ₆ are fixed by providing a filled layer 12 ′ of a heat-resistant hard synthetic resin material P ′ (see FIG. 14), a cover 19 is put on a forming base A ″, and formed into a locking hole 20. The locking projection 21 of the base A ″ is engaged and fixed. The cover 19 is provided with a half body 5b corresponding to the half body 5a of the hood 5, and the hood 5 is completed by covering the cover 19.

FIG. 15 shows an integrated terminal 2 for injector connection.
2, 22 ', and connecting cavities R, R' are shown below.
Are provided, and pressure contact type electric wire connection portions 22b, 22b 'having conductor press contact grooves 22c, 22c' are provided above (FIGS. 16, 17).
reference). The injector connection integrated terminals 22, 22 'are provided at the time of the first insert molding of the molding base A'. In this case, the relay terminal 15 is not required in the connection cavities R, R '.

In the structure shown in FIG. 18, a receiving groove 23 is formed which is opened downward in the extension direction of one side of the main trunk portion 1 of the molded base A ', and a vertical plate of an L-shaped reinforcing plate 24 is formed in the receiving groove 23. The horizontal plate portion 24b is temporarily fixed in a state where the horizontal plate portion 24b is in contact with the bottom portion of the main trunk portion 1, and the molded base A 'is secondarily insert-molded into the heat-resistant hard synthetic resin P to cover the same as described above. It is fixed by providing the layer 12 (see FIG. 19).

In the case of FIG. 20, at the injector connecting portions A _{1 to} A ₆ of the molded base A ′, the injector connecting integrated terminals 22 and 22 ′ are provided by insert molding, and the housing formed at the main trunk 1 is formed. The reinforcing plate 24 is fitted into the groove 23 and integrated by secondary insert molding (see FIG. 21).

[0023]

According to the first aspect of the present invention, since the plurality of injector connection terminals are provided independently of each other by insert molding in the molded base, the plurality of injector connection terminals are connected to the bus bar. As described above, the set position does not shift due to the thermal deformation of the bus bar, the pitch accuracy of the injector connection terminals can be increased corresponding to a plurality of injectors, and collective connection to a plurality of injectors can be easily performed. can get.

According to the second aspect of the present invention, a single common circuit electric wire is connected to each of the injector connection terminals without providing a branch portion by routing such that the single common circuit wire is detoured in correspondence with the plurality of injector connection portions. be able to. In the third aspect of the invention, since the injector connection terminal has the female terminal located in the cavity for connection with the injector, the conventionally used female-female relay terminal can be omitted.

According to the fourth aspect of the present invention, since the wires are routed in the wire routing recesses, the wires are positioned in the recesses, thereby facilitating the subsequent fixing operation with the synthetic resin material.
According to the fifth aspect of the present invention, a plurality of electric wires can be routed while being arranged by the electric wire guide pins.

According to the sixth aspect of the present invention, it is possible to arrange the electric wires in a portion where many electric wires are arranged side by side by using the electric wire guide rails. In the invention of the seventh aspect, the electric wire is fixed by the coating layer and the connection portion with the terminal is reinforced, so that the whole can be formed in a waterproof type.

In the eighth aspect of the present invention, the deformation of the molded base is prevented by the reinforcing plate, and the operation of attaching and detaching to and from the injector is facilitated. According to the ninth aspect of the invention, the resin material can be easily filled into the electric wire routing concave portion, and the electric wire can be fixed and the connection portion with the terminal can be reinforced by the filling.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an injector connector block of an internal combustion engine according to the present invention corresponding to the injector.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG. 1 and shows a state where a relay terminal is provided.

FIG. 4 is a cross-sectional view taken along the line BB of FIG. 1, showing a state in which the relay terminal is omitted.

FIG. 5 is a perspective view showing a molded base in the injector connector block of FIG. 1;

FIG. 6 is an enlarged perspective view of the wire harness connector in FIG. 5;

FIG. 7 is an enlarged perspective view of an injector connecting portion in FIG.

FIG. 8 is an enlarged sectional view taken along line CC of FIG. 7;

FIG. 9 is a perspective view of an injector.

FIG. 10 is a sectional view taken along line DD of FIG. 9;

FIG. 11 is a perspective view showing another structure of the molded base.

FIG. 12 is an enlarged perspective view of an injector connecting portion in FIG.

FIG. 13 is a sectional view taken along line EE of FIG. 11;

FIG. 14 is a cross-sectional view taken along the line EE of FIG. 11, showing a state in which a resin material is filled in the electric wire routing concave portion.

FIG. 15 is a perspective view showing an injector connection terminal having a female terminal.

FIG. 16 is a sectional view corresponding to FIG. 2 having a female terminal;

FIG. 17 is a sectional view corresponding to FIG. 3 having a female terminal;

FIG. 18 is a sectional view of a molded base provided with a reinforcing plate.

FIG. 19 is a cross-sectional view provided with a coating layer of the above.

FIG. 20 is a cross-sectional view of a molded base provided with a reinforcing plate and having an injector connection terminal having a female terminal.

FIG. 21 is a cross-sectional view in which a covering layer is provided.

22 is a perspective view of the Injector connector block in the prior art.

FIG. 23 is a perspective view of a bus bar provided inside the above.

FIG. 24 is a perspective view showing a connection portion with the injector, which is separated therefrom;

FIG. 25 is a cross-sectional view of the injector connection portion.

[Explanation of symbols]

A injector connector block A ', A "molded body A ₀ connector wire harness A ₁ to A ₆ injector connection B common circuit wires B ₁ .about.B ₆ dedicated circuit wires 1 main trunk 2,2' wire cabling Recess 3 for wire harness connection terminal 3b press-connecting wire connection 6,6 'injector connecting terminal 6b, 6b' press-connecting wire connection 9 wire guide rail 10 wire guide pin 12 coating layer 12 'filling layer R.R' Connection cavity 22a, 22a 'Female terminal 24 Reinforcing plate

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F02M 51/02 F02M 51/06 F02M 55/02 330-340

Claims (9)

(57) [Claims] 1. A wire harness connector and a plurality of injector connection portions are integrally formed of a heat-resistant synthetic resin material .
And at the wire harness connection terminal and the plurality of injector connection portions in the wire harness connector.
Fixed by insert molding the injector connection terminal that
In the molded base provided as described above, an electric wire is routed between the press-connecting wire connecting portion of the wire harness connecting terminal and the press-connecting wire connecting portion of the injector connecting terminal, and the wire harness connector and the injector connecting portion are provided. A connector block for an injector of an internal combustion engine, wherein a heat-resistant synthetic resin coating is provided on the electric wire between them. 2. A wire harness connector is provided at one end of a substantially rod-shaped main trunk made of a heat-resistant synthetic resin material, and a plurality of injector connection parts are provided on one side in an extension direction of the main trunk. A common circuit wire located on the injector connection side and a plurality of dedicated circuit wires arranged side by side toward the other side are provided, and the common circuit wire is provided at each injector connection except for the last injector connection. After being connected to the injector connection terminal of the common circuit and routed around the outside of the injector connection terminal of the dedicated circuit, the end of each dedicated circuit wire is connected to the injector connection terminal of the dedicated circuit at the corresponding injector connection part 2. The connector block for an injector of an internal combustion engine according to claim 1, wherein the connector block is connected to the injector block. 3. The connector block for an injector of an internal combustion engine according to claim 1, wherein the injector connection terminal has a female terminal located in a cavity for connection with the injector. 4. A wire injector connector block of an internal combustion engine according to any one of 3 claims 1, characterized in that it is laid in the wire-installing recess provided on the upper surface of the molded base body. 5. The connector block for an injector of an internal combustion engine according to claim 4, wherein an electric wire guide pin is provided in the electric wire routing concave portion. 6. The connector block for an injector of an internal combustion engine according to claim 5, further comprising an electric wire guide rail in the electric wire routing concave portion. 7. The connector block for an injector of an internal combustion engine according to claim 1, wherein a coating layer of a heat-resistant synthetic resin is provided over the entire surface of the molded base. 8. The connector block for an injector of an internal combustion engine according to claim 7, wherein a reinforcing plate is provided between the molded base and the coating layer along the main trunk portion. 9. A wire-installing for the recess provided a packed bed of heat resistant hard resin, injectors for an internal combustion engine according to any of claims 4 to 6, wherein coupling the cover to the molded base body Connector block.