WO2010116777A1

WO2010116777A1 - Electric supply structure of fuel supply device

Info

Publication number: WO2010116777A1
Application number: PCT/JP2010/051320
Authority: WO
Inventors: 充福田; 覚氏中山; 基弘三島; 幸隆津田
Original assignee: 株式会社ケーヒン
Priority date: 2009-03-30
Filing date: 2010-02-01
Publication date: 2010-10-14
Also published as: BRPI1012668A2; BRPI1012668B1; JPWO2010116777A1; JP5269187B2

Abstract

The disclosed structure is provided with a bracket-side coupler (32) with a coupler-side partition (56), which is provided on the electrical supply unit of a fuel pump (4), and which partitions bracket-side electric supply terminals (33) embedded within; bracket-side caps (51), which are mounted with a liquid seal to the outer perimeter of the conducting portion of connecting terminals (50) that connect to the bracket-side electric supply terminals (33), and which form a liquid seal between the inside and outside of the bracket-side coupler (32) by being mounted on the bracket-side coupler (32); and a bracket-side terminal holder (45), which grasps the bracket-side caps (51), attaching them to the bracket-side coupler (32). The disclosed structure can reliably prevent the occurrence of corrosion of terminals without using a sealing material, and can prevent detachment of connecting terminals.

Description

Power supply structure for fuel supply system

The present invention relates to a power supply structure of a fuel supply device, and more particularly to a power supply structure of a fuel supply device for supplying power to a fuel pump of a fuel supply device that supplies fuel to an internal combustion engine.

Conventionally, a fuel supply device having a fuel pump for supplying the fuel in the fuel tank to the internal combustion engine has been used in many cases, and this fuel pump is driven while being immersed in the fuel in the fuel tank. is there. Such a fuel pump is provided with a power supply terminal. By connecting a connection terminal of the connector to this power supply terminal, the fuel pump is connected to an external power source and supplies power to the fuel pump.

However, such a conventional power supply structure has a problem that the fuel stored in the fuel tank acts as an electrolyte, a weak current flows between the terminals, and the terminals are corroded. ing.

In order to prevent such corrosion of the terminal portion, conventionally, an insulating sealing material is provided on the bottom surface of the fuel pump connector insertion port, and a partition that separates the positive and negative connection terminals is provided on the connector. A technique is disclosed in which when the connector is connected, the tip of the partition wall of the connector is pressed against the sealing material to liquid-seal the inside of the connector (see, for example, Patent Document 1).

JP 2008-038649 A

However, in the invention described in Patent Document 1, since the fuel inside the fuel pump is at a high pressure when the fuel pump is in operation, the connector is connected from the gap between the fuel pump housing and the power supply terminal. There is a problem that the fuel leaks inside, the fuel accumulates between the housing and the seal member, and current flows between the terminals at this portion, which may cause corrosion of the terminals.

Also, there is a problem that the connector is pressed in the direction of disconnection due to the elasticity of the seal member, and the connecting portion of the connector may be loosened or disconnected.

The present invention has been made in view of the above points, and can reliably prevent the occurrence of corrosion of the terminal portion without using a sealing material, and can prevent the connection terminal from coming off. An object of the present invention is to provide a power feeding structure for the apparatus.

In order to achieve the above object, a power supply structure for a fuel supply apparatus according to the first aspect of the present invention is disposed inside a fuel tank in which fuel is stored via a pump holding member, and is connected to an internal combustion engine in the fuel tank. In a power supply structure of a fuel supply device for supplying power to an electric fuel pump that pumps fuel,
A coupler provided with at least one power feeding portion of the fuel pump or the pump holding member and having a pair of power feeding terminals implanted;
A partition provided inside the coupler and separating each power supply terminal;
A connection terminal connected to the power supply terminal;
A cap member that is attached to at least the outer peripheral portion of the conductive portion of the connection terminal and is liquid-sealed by being attached to the coupler;
A terminal holder for fixing the cap member to the coupler in a state of being sandwiched by the coupler;
It is characterized by having.

The invention of claim 2 is characterized in that, in claim 1, the terminal holder is detachably attached to the coupler via an engagement mechanism.

According to a third aspect of the present invention, in the first or second aspect, a protrusion is provided on one of the cap member and the terminal holder or the coupler, and the other is engaged with the protrusion. A recess is provided.

According to a fourth aspect of the present invention, in any one of the first to third aspects, between the coupler and the terminal holder, the coupler and the coupler can be discharged so that the fuel flowing into the coupler can be discharged. A portion where the cap member is not sandwiched between the terminal holder and the terminal holder is provided.

According to the present invention, the partition is provided inside the coupler, and the cap member for liquid-sealing the inside and outside of the coupler is fixed to the coupler by the terminal holder in a state of being sandwiched between the coupler and connected to the power supply terminal. Each terminal part is electrically separated with the terminal connected, and the outer peripheral part of the connection terminal is liquid-sealed by the cap member, so even if fuel enters the coupler, It is possible to reliably prevent the weak current from flowing due to the moisture contained in the staying fuel inside and the feed terminal and the connection terminal from being corroded.

Also, since the terminal holder is detachably attached to the coupler via the engagement mechanism, the terminal holder can be easily detached from the coupler, and the fuel pump must be replaced when replacing the fuel pump. It can be done easily.

In addition, a protrusion is provided on one of the cap member and the terminal holder or the coupler, and a recess is provided on the other to engage the protrusion, and the coupler is engaged with the protrusion and the recess. Since the terminal holder is mounted, it is possible to reliably prevent the cap member from falling off.

Also, between the coupler and the terminal holder, a portion where the cap member is not sandwiched is provided between the coupler and the terminal holder so that the fuel flowing into the coupler can be discharged. Even if fuel enters, this fuel will be discharged to the outside through the part where the cap member between the coupler and the terminal holder is not sandwiched, and as a result, the same fuel will remain inside the coupler for a long time. The power supply terminal and the connection terminal can be prevented from being corroded by moisture contained in the staying fuel without staying.

It is a schematic sectional drawing which shows embodiment of the fuel supply apparatus with which the electric power feeding structure which concerns on this invention is applied. It is a disassembled perspective view which shows the upper bearing bracket part of the fuel supply apparatus in this embodiment. It is a top view which shows the upper bearing bracket of the fuel supply apparatus in this embodiment. It is a longitudinal cross-sectional view which shows the electric power feeding structure of the upper bearing bracket of the fuel supply apparatus in this embodiment. It is a side view which shows the electric power feeding structure of the upper bearing bracket of the fuel supply apparatus in this embodiment. It is a partial longitudinal cross-sectional view which shows the electric power feeding structure of the attachment base member of the fuel supply apparatus in this embodiment. It is a disassembled perspective view which shows the electric power feeding structure of the attachment base member of the fuel supply apparatus in this embodiment. It is a partial bottom view which shows the electric power feeding structure of the attachment base member of the fuel supply apparatus in this embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of a fuel supply device to which a power feeding structure according to the present invention is applied. As shown in FIG. 1, the fuel supply device 1 is mounted on a ceiling wall 2 of a fuel tank 1 mounted on a vehicle such as a motorcycle. A fuel supply device 5 having a fuel pump 4 for supplying the fuel stored in the fuel tank 1 to the fuel injection valve 3 of the engine is attached.

The fuel supply device 5 is formed integrally with the mounting base member 6 as a pump holding member, the fuel pump 4 arranged directly below the mounting base member 6 with the axial direction directed up and down, and the mounting base member 6. The upper pump holder 7 is detachably coupled to the upper pump holder 7, and the lower pump holder 8 that houses and holds the fuel pump 4 together with the upper pump holder 7, and the fuel attached to the lower end of the fuel pump 4 And a strainer 9.

An opening 10 for inserting the fuel pump 4 is provided in the ceiling wall 2 of the fuel tank 1, and a mounting ring 11 is provided around the opening 10 so as to surround the opening 10. It is fixed. A plurality of mounting bolts 12 projecting upward are fixed on the upper surface of the mounting ring 11.

On the upper surface of the attachment ring 11, the attachment base member 6 of the fuel supply device 5 is installed so as to close the opening 10 of the fuel tank 1 via the annular seal member 13, and the attachment base member 6 includes a plurality of attachment base members 6. The mounting ring 11 is fixed to the mounting ring 11 by a mounting bolt 12 and a plurality of nuts 14 screwed to the mounting bolt 12.

The mounting base member 6 is made of synthetic resin, and a fuel take-out pipe 15 extending in the horizontal direction outside the fuel tank 1 is integrally formed on the mounting base member 6. The mounting base member 6 is formed with a substantially L-shaped fuel passage 16 that passes from the inside of the mounting base member 6 to the inside of the fuel take-out pipe 15. Is connected to a fuel supply conduit 17 connected to the fuel injection valve 3 of the engine. In addition, a pressure regulating path 18 that branches from the middle of the fuel passage 16 and opens to the inside of the fuel tank 1 is formed at the rear end portion of the fuel take-out pipe 15. A regulator valve 19 for adjusting the pressure in the fuel passage 16 to a predetermined pressure suitable for fuel injection from the fuel injection valve 3 is provided at the opening portion of the pressure adjusting passage 18.

Further, an upper pump holder 7 is integrally formed on the lower surface of the mounting base member 6, and the upper pump holder 7 projects into the fuel tank 1 and fits to the outer peripheral surface of the upper half of the fuel pump 4. It is formed in a cylindrical shape. A plurality of locking grooves (not shown) are formed at equal intervals along the circumferential direction below the upper pump holder 7.

Below the upper pump holder 7, a cylindrical lower pump holder 8 made of a synthetic resin that accommodates and holds the lower half of the fuel pump 4 is disposed. A plurality of locking claws (not shown) that are engaged with the locking grooves of the upper pump holder 7 are integrally formed. Then, by engaging each locking claw with the locking groove, the upper pump holder 7 and the lower pump holder 8 are coupled, whereby the fuel pump 4 is placed between the upper pump holder 7 and the lower pump holder 8. Is to be housed and held.

The fuel pump 4 also includes an electric motor 20. The electric motor 20 includes a cylindrical stator 21 in which a plurality of magnets arranged in the circumferential direction are fixed on the inner peripheral surface, and a caulking at the upper end of the stator 21. The upper bearing bracket 22 is coupled, the lower bearing bracket 23 is coupled to the lower end of the stator 21, and the rotor 25 is rotatably supported by the upper bearing bracket 22 and the lower bearing bracket 23. ing.

The fuel pump 4 includes a pump case 26 disposed on the lower surface of the lower bearing bracket 23 and caulked to the stator 21 together with the lower bearing bracket 23. Between the pump case 26 and the lower bearing bracket 23, a pump case is provided. A chamber 27 is formed. A pump impeller 28 connected to the lower end of the rotor shaft 24 is rotatably accommodated in the pump chamber 27.

A suction port 29 that opens to the pump chamber 27 is provided on the lower surface of the pump case 26, and a fuel strainer 9 connected to the suction port 29 is attached to the lower surface of the pump case 26. The lower bearing bracket 23 is provided with a discharge port 30 that communicates the pump chamber 27 and the inside of the stator 21.

A fuel discharge pipe 31 protruding upward is integrally formed on one side of the upper surface of the upper bearing bracket 22, and the fuel discharge pipe 31 is connected to the interior of the stator 21 and the fuel passage 16 of the mounting base member 6. Are configured to communicate with each other.

Further, as shown in FIG. 2, a bracket side coupler 32 protruding upward is integrally formed on the other side of the upper surface of the upper bearing bracket 22, and a plus side and a minus side are formed inside the bracket side coupler 32. The bracket-side

power supply terminals

33, 33 are mounted so as to penetrate the upper bearing bracket 22. A bearing boss 34 that rotatably supports the upper end portion of the rotor shaft 24 of the rotor 25 is integrally formed at the center of the lower surface of the upper bearing bracket 22 so as to protrude downward. Is provided with a bearing bush 35 that rotatably supports the lower end portion of the rotor shaft 24.

A commutator 36 connected to the rotor coil is fixed to the upper end of the rotor 25. On the lower surface of the upper bearing bracket 22, a pair of cylindrical brush guides 37, 37 arranged in a row with the bearing boss 34 interposed therebetween are integrally provided upright. Inside each brush guide 37, plus and minus brushes 38 are slidably accommodated. Inside each brush guide 37, each brush 38 is in the direction of pressure contact with the commutator 36. The coil springs 39 are energized respectively. Each brush 38 is connected to bracket-side

power supply terminals

33 and 33 on the plus side and the minus side via

conductors

40 and 40, respectively.

Further, on the lower surface side of the upper bearing bracket 22, a plus-side bracket-side power supply terminal 33 and a conductive wire 40, and a bracket-side partition wall 41 that isolates the negative-side bracket-side power supply terminal 33 and the conductive wire 40 are integrally formed. On the lower surface side of the bracket-side partition wall 41, a synthetic resin insulating cover 42 for closing the accommodation space of each bracket-side power supply terminal 33 is attached.

Further, as shown in FIG. 3, a coupler-side partition wall 56 that isolates each bracket-side power feeding terminal 33 located inside the bracket-side coupler 32 is integrally formed inside the bracket-side coupler 32. Engaging members 43 projecting substantially in a U-shape are integrally formed on both outer sides of the bracket-side coupler 32, and a terminal notch 44 is formed on one side of the upper end portion of the bracket-side coupler 32. Has been.

As shown in FIGS. 4 and 5, a bracket-side terminal holder 45 is disposed at the upper end of the bracket-side coupler 32, and a locking groove as a recess is formed on the lower surface of the bracket-side terminal holder 45. 46 is formed. A holding piece 47 bent downward is formed at both ends of the bracket-side terminal holder 45, and an engaging claw 48 to be engaged with the engaging member 43 is formed at the lower end of the holding piece 47. Has been. The engagement member 43 and the engagement claw 48 constitute an engagement mechanism.

One connecting terminal 50 of the connecting wire 49 is connected to each of the plus-side and minus-side bracket-side power supply terminals 33, and a cap that covers the conductive portion of the connecting terminal 50 on the outer peripheral side of the connecting terminal 50. A bracket side cap 51 made of an elastic material such as rubber is provided as a member. The bracket-side cap 51 has a cross-sectional shape that closes the terminal notch 44 formed in the bracket-side coupler 32, and the upper surface of the bracket-side cap 51 has a locking groove for the bracket-side terminal holder 45. A locking protrusion 52 is formed as a protrusion engaged with 46. Then, the bracket-side cap 51 is attached to each connection terminal 50, and each connection terminal 50 is connected to each bracket-side power supply terminal 33. In this state, the bracket-side cap 51 is inserted into the locking groove 46 of the bracket-side terminal holder 45. The engaging projection 52 of the holding piece 47 is engaged with the engaging member 43 of the bracket-side coupler 32, whereby the bracket-side cap 51 of the connection terminal 50 is attached to the bracket-side coupler 32. The bracket side terminal holder 45 is mounted while being held.

At this time, in this embodiment, the distance between the connection terminal 50 and the bracket-side terminal holder 45 is shorter than the length of the connection portion between the bracket-side power supply terminal 33 and the connection terminal 50. With this configuration, when a force is applied to the connection terminal 50 in a direction away from the bracket-side power supply terminal 33, the end of the connection terminal 50 comes into contact with the lower surface of the bracket-side terminal holder 45. Therefore, it is possible to reliably prevent the connection terminal 50 from being detached from the bracket-side power supply terminal 33.

Further, as shown in FIGS. 6 to 8, a base side coupler 53 is formed on the lower surface of the mounting base member 6 so as to protrude downward. Minus-side base-side

power supply terminals

54 and 54 are projected. An external coupler 55 is formed on one side of the upper portion of the mounting base member 6, and an external terminal 57 connected to the base-side power supply terminal 54 projects from the inside of the external coupler 55.

Inside the base-side coupler 53, a base-side partition wall 58 that isolates each base-side power supply terminal 54 located inside the base-side coupler 53 is formed integrally. A joint recess 59 is formed. The other connection terminal 60 of the connection wire 49 is connected to the base-side power supply terminal 54, and the base side made of an elastic material such as rubber covering the conductive portion of the connection terminal 60 is provided on the outer peripheral side of the connection terminal 60. A cap 61 is attached. On the outer surface of the base-side cap 61, an engaging protrusion 62 is formed to be engaged with the engaging recess 59 of the base-side coupler 53, and the engaging protrusion 62 of the base-side cap 61 is engaged with the engaging recess 59. By combining, the base side cap 61 is configured to be held.

A base-side terminal holder 63 is disposed below the base-side cap 61. The base-side terminal holder 63 has a conductor hole 64 and a caulking for inserting the connection conductor 49 of the connection terminal 60 therein. A working hole 65 is formed. Then, in a state where the connection conductor 49 is passed through the conductor hole 64, the caulking hole 65 is inserted into the protrusion 66 formed in the mounting base member 6 to thermally caulk the protrusion 66 portion, whereby the base-side terminal holder 63. Is fixed to the mounting base member 6.

At this time, in this embodiment, the distance between the connection terminal 60 and the base-side terminal holder 63 is shorter than the length of the connection portion between the base-side power supply terminal 54 and the connection terminal 60. With this configuration, when a force is applied to the connection terminal 60 in a direction away from the base-side power supply terminal 54, the end of the connection terminal 60 comes into contact with the upper surface of the base-side cap 61. Thus, the connection terminal 60 can be reliably prevented from being detached from the base-side power supply terminal 54.

Next, the operation of this embodiment will be described.

First, when connecting the connection terminal 50 of the connection conductor 49 to the bracket-side power supply terminal 33, the bracket-side cap 51 is attached to each connection terminal 50, and each connection terminal 50 is connected to each bracket-side power supply terminal 33. In this state, the engaging protrusion 52 of the bracket-side cap 51 is engaged with the engaging groove 46 of the bracket-side terminal holder 45, and the engaging claw 48 of the holding piece 47 is engaged with the engaging member 43 of the bracket-side coupler 32. As a result, the bracket-side terminal holder 45 is attached to the bracket-side coupler 32 while holding the bracket-side cap 51 of the connection terminal 50. As a result, the bracket-side coupler 32 is electrically separated from the bracket-side power supply terminal 33 by the coupler-side partition wall 56.

When connecting the connection terminal 60 of the connection conductor 49 to the base-side power supply terminal 54, the connection conductor 49 is connected to the base-side power supply with the base-side cap 61 and the base-side terminal holder 63 attached. The base side cap 61 is held by connecting to the terminal 54 and engaging the engaging protrusion 62 of the base side cap 61 with the engaging recess 59. Subsequently, the base side terminal holder 63 is fixed to the mounting base member 6 by inserting the caulking hole 65 of the base side terminal holder 63 into the protrusion formed on the mounting base member 6 and thermally crimping the protruding portion. Accordingly, the base-side cap 61 can be securely held by the base-side terminal holder 63, and the base-side coupler 53 is electrically separated from the base-side power supply terminals 54 by the base-side partition wall 58. become.

When the electric motor 20 is driven, the rotor shaft 24 is rotationally driven and the pump impeller 28 is rotationally driven. Along with this, the fuel in the fuel tank 1 is filtered by the fuel strainer 9 via the intake port 29. Inhaled into the pump chamber 27. The fuel sucked into the pump chamber 27 is boosted by the pump impeller 28 and is pumped into the stator 21 from the discharge port 30, and passes through the fuel passage 16 including the fuel discharge pipe 31 and the fuel take-out pipe 15 to the fuel injection valve 3. Supplied.

At this time, since the pressure of the fuel passage 16, that is, the discharge pressure of the fuel pump 4 acts on the regulator valve 19 via the pressure adjusting passage 18, when the discharge pressure of the fuel pump 4 exceeds a predetermined value, the regulator valve 19 Is opened so that part of the fuel in the fuel passage 16 is returned to the inside of the fuel tank 1, and the pressure in the fuel passage 16 is automatically adjusted to a predetermined value.

The bracket-side coupler 32 may receive fuel discharged from the regulator valve 19 or may enter the bracket-side coupler 32 from the lower surface side of the upper bearing bracket 22 due to the internal pressure of the stator 21. In the present embodiment, the bracket-side coupler 32 is included in the staying fuel inside the bracket-side coupler 32 because the bracket-side power supply terminals 33 are electrically separated by the coupler-side partition wall 56. It is possible to reliably prevent the bracket-side power supply terminal 33 and the connection terminal 50 from being corroded by moisture.

Further, the base side coupler 53 is also electrically separated by the base side partition wall 58, and the base side power supply terminals 54 are electrically separated by the base side cap 61. Therefore, even if the fuel enters the base-side coupler 53, the base-side power supply terminal 54 and the connection terminal 60 can be reliably prevented from corroding.

Further, by engaging the engaging claw 48 of the bracket-side terminal holder 45 with the engaging member 43 of the bracket-side coupler 32, the bracket-side terminal holder while holding the bracket-side cap 51 of the connection terminal 50 on the bracket-side coupler 32. 45 is installed, and a portion where the bracket-side cap 51 is not sandwiched between the bracket-side coupler 32 and the bracket-side terminal holder 45 is provided, so that fuel has entered the bracket-side coupler 32. Even in this case, the fuel is discharged to the outside through the gap between the bracket side coupler 32 and the bracket side terminal holder 45. As a result, the same fuel does not stay in the bracket-side coupler 32 for a long time, and it is possible to prevent the bracket-side power supply terminal 33 and the connection terminal 50 from being corroded by moisture contained in the retained fuel. .

As described above, in the present embodiment, the bracket-side coupler 32 is electrically separated from the bracket-side power supply terminal 33 by the coupler-side partition wall 56. Even when it enters, it is possible to reliably prevent the bracket-side power supply terminal 33 and the connection terminal 50 from being corroded by moisture contained in the staying fuel inside the bracket-side coupler 32. In addition, since the base side power supply terminals 54 are also electrically separated by the base side partition wall 58 in the base side coupler 53, the base side power supply terminal can be used even when fuel enters the base side coupler 53. 54 and the connection terminal 60 can be reliably prevented from corroding.

Further, by engaging the engaging claw 48 of the bracket-side terminal holder 45 with the engaging member 43 of the bracket-side coupler 32, the bracket-side terminal holder while holding the bracket-side cap 51 of the connection terminal 50 on the bracket-side coupler 32. 45 is attached, the bracket-side terminal holder 45 can be easily detached from the bracket-side coupler 32, and the fuel pump 4 can be easily replaced when the fuel pump 4 is replaced. .

Further, since the bracket-side terminal holder 45 is mounted on the bracket-side coupler 32 in a state where the locking projections 52 of the bracket-side cap 51 are engaged with the locking grooves 46 of the bracket-side terminal holder 45, the bracket-side terminal holder 45 is mounted. It is possible to reliably prevent the side cap 51 from falling off.

In addition, since the distance between the connection terminal 50 and the bracket-side terminal holder 45 is formed to be shorter than the length of the connection portion between the bracket-side power supply terminal 33 and the connection terminal 50, the connection terminal 50 is connected to the bracket-side power supply terminal 33. It can be reliably prevented from coming off. Furthermore, since the distance between the connection terminal 60 and the base side terminal holder 63 is formed to be shorter than the length of the connection portion between the base side power supply terminal 54 and the connection terminal 60, the connection terminal 60 is connected to the base side power supply terminal 54. It is possible to reliably prevent it from coming off.

The present invention is not limited to the above-described embodiment, and various modifications can be made based on the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Fuel tank 3 Fuel injection valve 4 Fuel pump 5 Fuel supply apparatus 6 Mounting base member 9 Fuel strainer 15 Fuel extraction pipe 16 Fuel path 18 Pressure regulation path 19 Regulator valve 20 Electric motor 21 Stator 22 Upper bearing bracket 23 Lower bearing bracket 25 Rotor 26 Pump Case 27 Pump Chamber 28 Pump Impeller 29 Suction Port 30 Discharge Port 31 Fuel Discharge Pipe 32 Bracket Side Coupler 33 Bracket Side Feed Terminal 41 Bracket Side Bulkhead 43 Engaging Member 44 Notch for Terminal 45 Bracket Side Terminal Holder 46 Locking Groove 47 Holding piece 48 Engaging claw 49

Connection conductor

50, 60 Connection terminal 51 Bracket side cap 52 Locking protrusion 53 Base side coupler 54 Base side power supply terminal 55 External coupler 56 Coupler side partition wall 58 Base Partition wall 59 engaging recesses 61 base-side cap 62 engaging projection 63 base-side terminal holder 64 lead hole 65 caulking hole

Claims

In a power supply structure of a fuel supply device for supplying power to an electric fuel pump that is disposed inside a fuel tank in which fuel is stored via a pump holding member and pumps fuel in the fuel tank to an internal combustion engine,
A coupler provided with at least one power feeding portion of the fuel pump or the pump holding member and having a pair of power feeding terminals implanted;
A partition provided inside the coupler and separating each power supply terminal;
A connection terminal connected to the power supply terminal;
A cap member that is attached to at least the outer peripheral portion of the conductive portion of the connection terminal and is liquid-sealed by being attached to the coupler;
A terminal holder for fixing the cap member to the coupler in a state of being sandwiched by the coupler;
A power supply structure for a fuel supply device.
The power supply structure for a fuel supply device according to claim 1, wherein the terminal holder is detachably attached to the coupler via an engagement mechanism.
3. The projection according to claim 1, wherein a protrusion is provided on one of the cap member and the terminal holder or the coupler, and a recess that engages with the protrusion is provided on the other. Power supply structure of the fuel supply device of the present invention.
A portion between the coupler and the terminal holder is provided with a portion where the cap member is not sandwiched between the coupler and the terminal holder so that the fuel flowing into the coupler can be discharged. The power feeding structure of the fuel supply device according to any one of claims 1 to 3.