JP2956528B2 - Connector structure and electronic fuel injection device including the same - 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 having a female connecting portion to which a male connecting terminal is connected, and an electronic fuel injection device including the same.

[0002]

2. Description of the Related Art As a structure of a connector 21 having a female connection portion to which a male connection terminal is connected, as shown in FIG. 13, a cylindrical terminal housing protruding from a main body 10 of an electronic device or the like is provided. A structure in which the relay terminal 12 is accommodated and arranged inside the portion 11 is exemplified.

On the inner bottom surface of the terminal accommodating portion 11, a distal end of a male connection terminal 16 whose base end is buried in the main body 10 and electrically connected to an electric circuit as appropriate is formed in a protruding shape.

[0004] Female connecting portions 15a and 15b provided with a pair of elastic pieces 14 are provided at both ends of a relay terminal 12 housed and arranged in the terminal housing portion 11, and the female housing portion 15a is provided in the female connecting portion 15a. The connection terminal 16 on the bottom is connected.

The external connector 22 connected to the above-mentioned connector 21 comprises a male connection terminal 13 connected to the female connection portion 15b of the relay terminal 12, and an external connector housing 20 surrounding the connection terminal 13. Have been.

The connecting terminal 13 is connected to the female connecting portion 15.
The connection terminal 13 is connected to the relay terminal 12 when inserted between the two elastic pieces 14 of FIG.

[0007]

However, in the above-described connector structure, the worker himself or herself positions the tip of the connection terminal 13 so as to face between the two elastic pieces 14 of the female connection portion 15b, and then adjusts them. Was connected. For this reason, if the alignment is insufficient, the connection terminal 13 is connected to the relay terminal 1.
2 (see a two-dot chain line in FIG. 13), and the connection terminal 13 or the relay terminal 12 may be damaged.
In particular, when the external connector housing 20 becomes a blind spot and the connection terminal 13 and the female connection portion 15b cannot be visually confirmed, the connection terminal 13 may be displaced with respect to the female connection portion 15 and may be damaged. The nature becomes high.

Accordingly, the present invention has been made to solve the above problems, and when connecting male connection terminals to connection terminals housed and arranged in a housing, the connection terminals may be damaged. It is an object of the present invention to provide a connector structure that can avoid the above problem and an electronic fuel injection device including the same.

[0009]

In order to solve the above-mentioned problems, a connector structure according to the present invention is characterized in that a connection terminal having a female connection portion into which a male connection terminal is inserted in an insertion manner is accommodated. In the connector structure housed and disposed in the portion, a guide cap having an insertion guide passage portion for guiding the male connection terminal to the female connection portion is externally fitted and fixed to the terminal housing portion, and the insertion guide passage is provided. The portion is formed at the peripheral edge of the male connection terminal insertion side end portion and gradually decreases in diameter in the connection terminal insertion direction, and is parallel to the female connection portion so as to be continuous from the taper guide surface portion. To
And a gas <br/> id in side portions formed by the facing inner sides of the pair of projecting pieces which extend, said female contact on the tip side of both projecting pieces
Hold down the four corners of the connection terminal with connection
A holding projection is formed .

According to a second aspect of the present invention, there is provided an electronic fuel injection device comprising: an injector-side fuel connector having a fuel suction hole; and an injector-side electrical connector connected to one end of a built-in solenoid energizing circuit. A top feed type injector arranged in parallel such that the connection direction of the fuel supply path is the same direction, and a fuel supply path having a connection port to which the injector side fuel connector is connected,
The drive circuit-side electrical connector to which the injector-side electrical connector is connected, and the energizing circuit that connects the drive circuit-side electrical connector to the solenoid drive unit, the connection direction of the connection port and the drive circuit-side electrical connector are both the same. An electronic fuel injection device comprising a fuel supply unit integrated so as to be in the same direction, wherein the relay terminal having a female connection portion into which the male connection terminal of the injector-side electric connector is inserted is driven by the drive terminal. A guide cap, which is housed and arranged in the terminal housing of the circuit-side electrical connector and has an insertion guide passage for guiding the male connection terminal to the female connection in the terminal housing of the drive circuit-side electrical connector. External fitting fixed
The insertion guide passage portion is formed on a peripheral edge of the male connection terminal insertion side end portion, and has a tapered guide surface portion that is gradually reduced in diameter in a male connection terminal insertion direction, and the female connection portion is continuous from the tapered guide surface portion. Pair extending parallel to
And a guide inner surface formed by opposing inner surfaces of the projecting pieces, and pushing the four corners of the relay terminal toward the distal ends of the projecting pieces.
It is characterized in that a holding projection for holding and positioning is formed .

[0011]

According to the connector structure of the present invention, when connecting the male connection terminal to the female connection portion of the connection terminal housed in the terminal housing portion, the male connection terminal is connected to the female connection terminal. Even if the male connection terminal is slightly displaced with respect to the connection portion, the male connection terminal is guided to the guide inner side surface portion by the tapered guide surface portion formed on the male connection terminal insertion side peripheral edge of the insertion guide passage portion. By this, it is accurately guided to the female connection portion of the connection terminal and connected to the connection terminal.

According to the electronic fuel injection device of the second aspect, when the injector is attached to the fuel supply unit,
The connection of the injector-side fuel connector to the connection port of the fuel supply path and the connection of the injector-side electrical connector to the drive circuit-side electrical connector are simultaneously performed.

When connecting the male connection terminal of the injector fuel connector to the female connection portion of the relay terminal housed in the terminal housing portion of the drive circuit side electrical connector,
Even if the male connection terminal is slightly displaced with respect to the female connection portion, the male connection terminal is guided to the inner surface of the guide by the tapered guide surface formed on the periphery of the insertion guide passage portion on the male connection terminal insertion side. Then, the guide inner side surface portion is accurately guided to the female connection portion of the relay terminal and is connected to the relay terminal.

[0014]

Embodiments will be described below with reference to the drawings. As shown in FIGS. 1 to 5, this electronic fuel injection device includes a top feed type injector 100.
And a fuel supply unit 2 to which the injector 100 is attached.
00.

The injector 100 is shown in FIGS.
As shown in FIG. 1, an injector body 110 having a fuel injection section 111 having a fuel injection hole 112 at one end and an injector-side fuel connector 113 having a fuel suction hole 114 at the other end is formed.
0 and an injector-side electrical connector 120 integrally formed so as to protrude from the peripheral surface on the other end side.

A needle valve (not shown) and a solenoid 115 for driving the needle valve are built in the injector main body 110. The solenoid 115 is connected to the injector side via a current supply circuit (not shown). It is electrically connected to connector terminal 121 of electrical connector 120. The injector-side fuel connector 113 has a circumferential groove 116 formed at a tip end thereof, and an O-ring 117 is formed in the circumferential groove 116.
Is to be fitted.

The injector side electrical connector 120
Is a male connector terminal 121 and this connector terminal 1
And a connector housing 122 surrounding the injector-side fuel connector 113. The connector housing 122 surrounds the injector-side fuel connector 113, and the connection direction is in the same direction as the injector-side fuel connector 113.
Further, the connector housing 122 is formed with a lock portion 123 which engages with a locked portion 240 of the drive circuit side electric connector 230 described later and maintains a connection state with the drive circuit side electric connector 230.

The fuel supply unit 200 is shown in FIGS.
As shown in FIG. 3, an energizing circuit including a fuel supply path 211 extending in parallel with the longitudinal direction thereof, a fuel passage section 210 having a fuel return path 212, and a bus bar 221 indicated by a chain line in FIGS. Energized circuit section 220
And a mounting piece 202 for supporting the supply section main body 201 on the base side of an engine or the like. The supply section main body 201 and the mounting piece 202 are made of a synthetic resin material. Are formed integrally.

A connection port 213 for mounting the injector-side fuel connector 113 of the injector 100 is formed in the fuel passage 210 so as to protrude from the lower surface thereof at regular intervals along the longitudinal direction. Yes,
Each connection port 213 communicates with the fuel supply path 211.

The fuel passage portion 210 has a fuel tank (not shown) at one end of the fuel supply passage 211 at the λ opening portion and at the outlet of the fuel return passage 212, respectively.
Ports 214 and 215 are formed at the other end of the fuel supply passage 211 and the fuel return passage 21 on the other end side.
A connection port 216 of a pressure regulator (not shown) is formed so as to cover the inlet section 2. Therefore, the fuel supplied from the fuel tank into the fuel supply path 211 is adjusted in pressure by the pressure regulator in the fuel supply path 211, and the excess is returned to the fuel tank through the fuel return path 212. Will be.

A drive circuit side electrical connector 230 connected to the injector side electrical connector 120 of the injector 100 is connected to the connection port 2 in the energizing circuit section 220.
13 is formed so as to protrude from the lower surface side at a constant interval corresponding to 13 and, at the center in the longitudinal direction, electrically connects the energizing circuit section 220 to the solenoid drive section (not shown). Is formed so as to protrude from the upper surface side, and the connection terminal 231 of the drive circuit side electrical connector 230 and the electrical connector 280 are formed.
Are electrically connected to the connection terminal 281 by the bus bar 221.

The drive circuit side electrical connector 230 is arranged in parallel with the connection port 213 so that the connection direction thereof is the same as the connection direction of the connection port 213 of the fuel passage section 210. When the injector-side fuel connector 113 is mounted on the fuel supply unit 200 via the connection port 213, the injector-side electrical connector 120 can be connected at the same time.

Each of the drive circuit side electrical connectors 23
0 is the fuel supply unit 200 as shown in FIGS.
A pair of male connection terminals 2 arranged side by side along the longitudinal direction of
31, a pair of female relay terminals 250 connected to the connection terminals 231, respectively, and a relay terminal receiving portion 232 formed so as to surround the two relay terminals 250 in a separated state.
The connection terminals 121 of the injector-side electrical connector 120 are inserted into the relay terminals 250 and connected to the relay terminal housing 232 so as to be fitted around the relay terminal housing portion 232 so as to surround the outside of the connector housing 122 of the injector-side electrical connector 120. Formed housing 233
And the connector housing 233
Is formed with a locked part 240 which engages with a lock part 123 formed on the connector housing 122 of the injector-side electric connector 120.

Each of the relay terminals 250 has female connecting portions 251a and 251b provided with a pair of elastic pieces 251 at both ends, respectively, as in the prior art. Connection terminals 231, 12
1 is sandwiched.

Further, around the base end of the relay terminal housing 232, the outer peripheral surface of the relay terminal housing 232 and the inner peripheral surface of the connector housing 122 of the connected electrical connector 120 on the injector side are in close contact. In addition, a sealing material 260 for imparting waterproof performance is attached, and the connection terminal 121 of the injector-side electric connector 120 is mounted at an end of the relay terminal accommodating portion 232 in an appropriate posture.
A guide cap 270 for guiding to the outside 50 is fitted and inserted (see FIG. 7).

The guide cap 270 is made of a flexible resin. As shown in FIGS. 8 to 12, the guide cap 270 has an annular side wall 271 surrounding the distal end of the relay terminal housing 232 at the time of insertion. And a lid 272 that is continuous with the annular side wall 271 and closes one opening (the end side of the relay terminal housing 232). Annular side wall 271
On one side, an engagement elastic piece 273 is formed so as to extend in the direction in which the guide cap 270 is inserted, with one side cut away. An engagement protrusion 274b that engages with the engagement recess 274a provided on the terminal housing 232 side is formed in an inwardly projecting shape. In addition, on the inner peripheral surface side of the annular side wall portion 271, a protruding ridge portion 271a is formed so as to be tightly attached to the outer peripheral surface of the relay terminal accommodating portion 232 when the guide cap 270 is inserted to prevent rattling. .

The cover 272 has a relay terminal housing 23
A pair of insertion guide passage portions 275 each including a tapered guide surface portion 276 and a guide inner side surface portion 277 are formed corresponding to each position of the pair of relay terminals 250 in the pair 2. The tapered guide surface portion 276 is provided on the periphery of the insertion side of the male connection terminal 121 of the insertion guide passage portion 275, and is tapered so as to gradually decrease in diameter in the insertion direction of the connection terminal 121. Also, the tapered guide surface portion 27
A pair of protruding pieces 277a extend in parallel from 6 toward the female connection portion 251a of the relay terminal 250, and a guide inner side surface portion 277 is formed by the opposing inner side surfaces. Further, holding protrusions 277 for pressing and holding the four corners of the relay terminal 250 at the distal ends of the both protruding pieces 277a.
As a result, relative positioning between the tapered guide surface portion 276 and the female connection portion 251a is performed.

The seal member 260 is provided on the inner and outer peripheral surfaces of the seal member main body 261 on the relay terminal housing portion 232.
Of the connector housing 122 of the injector-side electrical connector 120 and the inner peripheral surface of the connector housing 122 are provided.

When assembling the electronic fuel injection device configured as described above to an engine, first, as shown in FIG. 6, the injector-side fuel connector 113 and the injector-side electric connector 120 of the injector 100 are connected to the fuel. The injector 100 is connected to the connection port 213 of the supply unit 200 and the drive circuit side electrical connector 230, respectively.
Is attached to the fuel supply unit 200. At this time, as described above, the injector side fuel connector 113 and the connection port 21 are connected.
3 and the connection between the injector-side electrical connector 120 and the drive circuit-side electrical connector 230 can be simultaneously performed by one operation.

After the fuel supply unit 200 to which the injectors 100 are attached is mounted on the cylinder of the engine, the fuel injection unit 111 of each injector 100 is attached to the fuel supply unit 200 via the attachment piece 202. , And electrically connects the energizing circuit unit 220 of the fuel supply unit 200 to the solenoid driving unit via an electric connector 280.

When the above-described assembling method is adopted, when each injector 100 is mounted on the cylinder of the engine, as in the case where the injector 100 is mounted on the cylinder of the engine first, the connection port on the fuel supply unit 200 side is used. There is no need to consider the deviation of the angle with respect to the 213 and the drive circuit side electrical connector 230, and the assembling work can be performed efficiently.

When the male connection terminal 121 of the injector side electrical connector is connected to the female connection portion 251a of the relay terminal 250, the male connection terminal 121 is connected to the female connection portion 251a.
The male connection terminal 121
Is guided to the guide inner surface 277 by a tapered guide surface 276 formed on the peripheral edge of the insertion side of the male connection terminal 121 of the insertion guide passage 275, and the guide inner surface 2
77 accurately guides the female connection portion 251 a to connect to the relay terminal 250.

In this embodiment, the case where the connector structure according to the present invention is applied to an electronic fuel injection device of an automobile has been described. However, the connector structure used for electric equipment such as general household electric equipment and OA equipment is described. In this case, the same operation and effect can be obtained by providing a guide cap similar to that of the present embodiment on the female connection portion side of the connection terminal.

[0034]

As it is evident from the foregoing description, according to the connector structure of claim 1, wherein the present invention, when connecting the male connection terminal to the female connection portion of the housing arranged a connection terminal in the terminal receiving portion, the female
Connection terminals with connection parts are held at four corners by protrusions
Lighted are positioned and held, even if the male connecting terminal are slightly shifted with respect to the female connection portion, the male connection terminal formed on the male connecting terminal insertion side peripheral edge of the insertion guide passage Guided to the inner surface of the guide by the tapered guide surface,
The guide inner side surface accurately guides the female terminal of the connection terminal to be connected to the connection terminal. Therefore, it is possible to effectively avoid damage to the male and male connection terminals due to incorrect insertion of the connection terminals.

According to the electronic fuel injection device of the second aspect, when the injector is attached to the fuel supply unit,
Since the connection of the injector-side fuel connector to the connection port of the fuel supply path and the connection of the injector-side electric connector to the drive circuit-side electric connector are performed simultaneously, assembly workability is improved.

Further, when connecting the male connection terminal of the injector side fuel connector to the female connection portion of the relay terminal housed in the terminal housing portion of the drive circuit side electric connector,
The relay terminals are positioned with the four corners held down by the holding projections
Even if the male connection terminal is slightly displaced with respect to the female connection portion , the male connection terminal is still fixed to the tapered guide surface formed on the periphery of the insertion guide passage portion on the male connection terminal insertion side. As a result, the guide is guided to the inner surface of the guide, and the inner surface of the guide accurately guides the female connection of the relay terminal to connect to the relay terminal. Therefore, damage to the male connection terminals due to incorrect insertion of the connection terminals can be effectively avoided.

[Brief description of the drawings]

FIG. 1 is a partially cutaway sectional view of an injector showing one embodiment according to the present invention.

FIG. 2 is a plan view of the injector.

FIG. 3 is a plan view of a fuel supply unit according to one embodiment of the present invention.

FIG. 4 is a side view of the same.

FIG. 5 is a bottom view of the same.

FIG. 6 is a partially cutaway sectional view showing a state in which the injector is attached to a fuel supply unit.

FIG. 7 is a cross-sectional view showing a state in which a guide cap is attached to the relay terminal housing.

FIG. 8 is a front view of a guide cap showing one embodiment according to the present invention.

FIG. 9 is a plan view of the same.

FIG. 10 is a bottom view of the above.

FIG. 11 is a sectional view taken along line XI-XI in FIG. 9;

FIG. 12 is a sectional view taken along line XII-XII of FIG. 9;

FIG. 13 is a sectional view showing a conventional connector structure.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 injector 113 injector-side fuel connector 120 injector-side electrical connector 121 male connection terminal 200 fuel supply unit 210 fuel passage unit 220 conducting circuit unit 232 relay terminal housing unit 250 relay terminal 251a female connection unit 270 guide cap 275 insertion guide passage unit 276 Tapered guide surface 277 Guide inner surface

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-59787 (JP, A) JP-A-5-209567 (JP, A) JP-A-6-10789 (JP, A) JP-A-63-1988 36060 (JP, A) JP-A 2-27682 (JP, U) JP-A 62-103180 (JP, U) Table 4 4-505202 (JP, A) (58) Fields surveyed (Int. Cl. ⁶ , DB name) F02M 51/06 F02M 51/02 F02M 55/02 330-340 H01R 13/52 301 H01R 13/56-13/72

Claims (2)

(57) [Claims] 1. A connector structure in which a connection terminal having a female connection portion to which a male connection terminal is inserted and connected is housed in a terminal housing portion, wherein the male connection terminal is provided in the terminal housing portion. A guide cap having an insertion guide passage portion for guiding to the female connection portion is externally fitted and fixed, and the insertion guide passage portion is formed on the periphery of the male connection terminal insertion side end portion and faces the connection terminal insertion direction. And a pair of taper guide surfaces extending in parallel to the female connection portion so as to be continuous from the taper guide surface portion.
And a guide inner side surface formed by opposed inner side surfaces of the projecting pieces, and a contact section having the female connecting portion on the tip side of the both projecting pieces.
Holding protrusions that hold down the four corners of the connection terminal to hold the positioning
A connector structure, characterized in that a connector is formed . 2. An injector-side fuel connector having a fuel suction hole and an injector-side electric connector connected to one end of a built-in solenoid energizing circuit are connected in parallel so that their connection directions are in the same direction. , A fuel supply path having a connection port to which the injector-side fuel connector is connected, a drive circuit-side electrical connector to which the injector-side electrical connector is connected, and the drive circuit-side electrical connector An electronic fuel injection device comprising an energizing circuit for connecting a solenoid drive unit and a fuel supply unit integrated such that the connection direction of the connection port and the connection direction of the drive circuit side electrical connector are both in the same direction. A relay terminal having a female connection portion into which a male connection terminal of the injector-side electrical connector is inserted; A guide cap which is housed and arranged in a terminal accommodating portion of the driving circuit side electric connector, and has an insertion guide passage portion for guiding the male connection terminal to the female connection portion in the terminal accommodating portion of the driving circuit side electric connector. The insertion guide passage portion is formed at the peripheral edge of the male connection terminal insertion side end portion, and the taper guide surface portion which is sequentially reduced in diameter in the male connection terminal insertion direction is continuous with the tapered guide surface portion. One extending parallel to the female connection portion so as to
And a facing inner side guide side portion formed by the pair of projecting pieces, four corners of the relay terminal on the distal end side of the both projecting pieces
An electronic fuel injection device, wherein a holding projection for holding down and positioning and holding is formed .