JPH1122589A - Fixing structure of fuel injection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the fixing time of a fuel injection device without preparing another member for fixing the fuel injection device. SOLUTION: A pair of the right and left holding pieces 28, 29 are elastically deformably erected at the edge of the insertion hole 25 of a fuel injection device 40, and taper guide sections 30, 31 and grooves 32, 33 storing a flange 43 are provided on the opposite inner faces of the holding pieces 28, 29 in sequence from above to below. When the flange 43 is slid on the taper guide sections 30, 31, the holding pieces 28, 29 are opened to the right and left, the flange 43 is dropped in the grooves 32, 33, and the fuel injection device 40 can be elastically pinched by the holding pieces 28, 29.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing structure of a fuel injection device for feeding fuel into a combustion chamber of an engine.

[0002]

2. Description of the Related Art A fuel injection device supplies fuel into a combustion chamber by, for example, injecting fuel into an intake manifold. As shown in FIG. 3 of Japanese Unexamined Patent Publication No. 4-287868, “Engine Fuel Injection Device”, an injector (fuel injection device) 13 is attached to a holder 1 of a delivery pipe 11.
4, the injector 13 is fixed by covering the upper end of the injector 13 with a fixing / position restricting member 15 and attaching the fixing / position restricting member 15 to the mounting projections 16, 16 of the holder 14 with bolts 17, 17. Is what you do.

[0003]

However, the above technique is
In order to fix the injector 13 to the holder part 14,
Since the fixing / position regulating member 15 and the bolts 17, 17 are required, the number of fixing members increases, and the assembling time also increases. Further, when the holder 14 is a resin member,
It is necessary to insert a nut for fastening the bolts 17 at the time of forming the holder portion 14. As a result,
When recycling the holder unit 14, the holder unit 1
Since it is necessary to remove the nut from inside 4, the workability of recycling is reduced.

Accordingly, it is an object of the present invention to reduce the number of members for fixing the fuel injection device, shorten the time for fixing the fuel injection device, and improve the workability of recycling. It is to provide the technology which can do.

[0005]

In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a fuel injection device having an injection port at a lower portion, a flange at an upper portion, an insertion port of a power supply coupler at an upper end, and having a cylindrical shape as a whole. In the fixing structure of the fuel injection device for fixing the injection device, a plurality of holding pieces are integrally formed at the edge of the insertion hole of the fuel injection device so as to be elastically deformable, and a guide portion and an inner surface of these holding pieces are provided. Grooves for accommodating the flanges are provided in order from top to bottom, the holding pieces are opened by sliding the flanges on multiple guides, and the flanges are dropped into the multiple grooves, making the fuel injection device elastic with multiple holding pieces It is characterized by being sandwiched between the two.

[0006] Just by inserting the fuel injection device into the insertion hole for the fuel injection device, the fuel injection device can be fixed by elastically sandwiching the flange of the fuel injection device with a plurality of holding pieces. For this reason, it is not necessary to prepare a separate fixing member for fixing the fuel injection device, and the fixing time of the fuel injection device can be shortened. As described above, the fuel injection device can be fixed without using bolts. Therefore, even if the member on the insertion hole side is made of resin, there is no need to embed a nut for fastening the bolt in this member. Therefore, when this member is recycled, it is not necessary to remove the nut, so that the workability of recycling can be improved.

According to a second aspect of the present invention, a fuel inlet is provided at an intermediate portion of the fuel injection device. Since the fuel inlet is provided in the middle of the fuel injection device, the fuel pipe for supplying fuel to the fuel inlet can be lowered to the middle of the fuel injection device. Therefore, on the upper side of the fuel pipe,
Since the holding piece for fixing the power supply coupler can be provided, the holding piece can be provided at a suitable position. As a result, when the power coupler is inserted from above, the power coupler can be reliably fixed by the holding piece.

On the other hand, in the case of a top feed type fuel injection device having a fuel intake port at the top, the fuel pipe is provided above the fuel injection device, so that the holding piece is located below the fuel pipe. Will be provided. For this reason, if the holding piece is disposed below the fuel passage that connects the fuel pipe to the fuel intake, the holding piece is hidden by the fuel passage. Even if the power supply coupler is inserted from above, the fuel passage is obstructed and the power supply coupler cannot be locked to the holding piece. Although it is possible to compensate for this problem by increasing the number of holding pieces, there is a concern that the configuration may be complicated.

Further, similarly to the first aspect, simply inserting the fuel injection device into the insertion hole for the fuel injection device, the flange of the fuel injection device is elastically sandwiched by a plurality of holding pieces, and the fuel injection device is mounted. Can be fixed. For this reason, it is not necessary to prepare a separate fixing member for fixing the fuel injection device, and the fixing time of the fuel injection device can be shortened. As described above, the fuel injection device can be fixed without using bolts. Therefore, even if the member on the insertion hole side is made of resin, there is no need to embed a nut for fastening the bolt in this member. Therefore, when this member is recycled, it is not necessary to remove the nut, so that the workability of recycling can be improved.

According to a third aspect of the present invention, a plurality of arms are extended from a power supply coupler, holes are opened to the outside, and a power supply coupler is inserted into the insertion port. At the time of insertion, the holes of the plurality of arms are respectively engaged with the claws of the holding piece to prevent the power supply coupler from coming off.

By simply inserting the power supply coupler into the insertion port of the fuel injection device, the power supply coupler can be fixed so as not to fall out of the insertion hole. For this reason, it is not necessary to prepare a separate fixing member for fixing the power supply coupler, and the fixing time of the power supply coupler can be shortened. In addition, since the plurality of arms each have holes opened outwardly, the claws of the holding pieces can be seen from the outside, so that it is possible to confirm from outside that the holes are engaged with the claws of the holding pieces. it can.

According to a fourth aspect of the present invention, a plurality of levers are hinged to the power supply coupler, and holes are opened to the outside of the lower portions of the plurality of levers. An elastic member for approaching the lever is provided between the plurality of levers, and the plurality of holes are engaged with the claws of the holding piece to prevent the power supply coupler from coming off.

By simply inserting the power supply coupler into the insertion port of the fuel injection device, the power supply coupler can be fixed so as not to fall out of the insertion hole. For this reason, it is not necessary to prepare a separate fixing member for fixing the power supply coupler, and the fixing time of the power supply coupler can be shortened. Further, the plurality of holding pieces can be pressed inward by bringing the plurality of levers closer to each other with the pressing force of the elastic member. As a result, the fuel injection device can be more reliably fixed. Further, since the plurality of levers are hinged, the plurality of levers can be easily opened. As a result, it becomes easy to remove the power supply coupler. In addition, since the plurality of levers each have holes opened to the outside, the claws of the holding pieces can be seen from the outside, so that it is possible to confirm from outside that the holes are engaged with the claws of the holding pieces. it can.

According to a fifth aspect of the present invention, the insertion hole and the plurality of holding pieces of the fuel injection device are formed of synthetic resin.

A plurality of holding pieces can be easily formed integrally with the insertion hole of the fuel injection device. By fixing the fuel injection device with the plurality of holding pieces, the fuel injection device can be fixed without using bolts. As a result, there is no need to embed a nut for fastening the bolt in the member on the insertion hole side. Therefore, when this member is recycled, it is not necessary to remove the nut, so that the workability of recycling can be improved.

[0016]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is a sectional view of a gasoline engine provided with a fuel injection device fixing structure (first embodiment) according to the present invention. The gasoline engine 1 includes a cylinder block 4 in which a piston 3 is slidably housed in a cylinder 2, and a cylinder head 9 attached to an upper end of the cylinder block 4 and having an intake valve 6, an exhaust valve 7, and a spark plug 8.
And an intake manifold 12 attached to the right side of the cylinder head 9;
A multi-cylinder engine comprising: a fuel injection device fixing structure 20 attached to the engine. The fixing structure 2 of the fuel injection device
0 is described in more detail in FIGS. Reference numeral 14 denotes an exhaust manifold attached to the left side of the cylinder head 9.

FIG. 2 is a perspective view of a fixing structure (first embodiment) of the fuel injection device according to the present invention, and shows a plurality of fuel injection devices. One of the fuel injection devices indicates a detached state, and the other fuel injection device indicates a fixed state. Note that the following description will be made with respect to one of the fuel injection devices in a detached state.
The fixing structure 20 of the fuel injection device according to the present invention includes a holder 23 provided on the fuel pipe 22, a fuel injection device 40 installed in the holder 23, and a fuel injection device 40.
And a power supply coupler 50 electrically connected to the power supply.

The holder 23 has a cylindrical portion 26 provided with an insertion hole 25 for a fuel injection device, and left and right holding pieces 28 integrally formed on the left and right edges of the cylindrical portion 26 so as to be elastically deformable. , 29, and tapered guides 30, 31 and left and right grooves 32, 33 as left and right guides provided in order from top to bottom on opposing inner surfaces of the holding pieces 28, 29,
Left and right claws 3 protruding from the outer surfaces of the left and right holding pieces 28 and 29
4,35. The tip 26a of the cylindrical portion 26
Is inserted into the hole 12a of the intake manifold 12 and attached (see FIG. 1). The left and right guides are not limited to the tapered guides 30 and 31, and may have other shapes such as a curved guide.

The fuel injection device 40 has a cylindrical shape as a whole, and has an injection port 41 provided at a lower portion, a fuel inlet 42 provided at an intermediate portion, and a flange 43 provided at an upper portion.
And an insertion port 45 provided at the upper end.

The power coupler 50 includes an insertion portion 51 inserted into the insertion port 45, left and right levers 53, 54 hinged to the left and right of the insertion portion 51, and these levers 53, 54.
Left and right holes 55 opened to the outside at the bottom of
56, and a torsion spring 58 as an elastic member provided between the left and right levers 53 and 54 to bring the tips of the left and right levers 53 and 54 closer to each other. Reference numeral 59 denotes a pin for attaching the torsion spring 58.

Since the holes 55 and 56 of the levers 53 and 54 are opened to the outside, the holes 55 and 56 of the left and right levers 53 and 54 are opened.
When the hook 56 is engaged with the left and right claws 34, 35, by observing the claws 34, 35 from the outside, it can be confirmed that the holes 55, 56 have reliably meshed with the claws 34, 35. In addition, the hole 55 opened in the lower part of the lever 53,54,
It is also possible to replace 56 with a recess formed inside the lever 53,54.

FIG. 3 is a sectional view taken along line 3-3 of FIG. 2, and the fuel injection device 40 is fixed to the holder 23.
Shows a state in which the power supply coupler 50 is inserted into the insertion port 45. By turning on a built-in solenoid valve (not shown), the fuel injection device 40 supplies fuel from the fuel inlets 42 (... Indicating a plurality of fuel inlets) facing the fuel passage 22 a of the fuel pipe 22. The fuel is guided inside to inject fuel from the lower injection port 41. 42a are filters attached to the fuel inlets 42, and 46 and 47 are O-rings, respectively.

FIG. 4 is a sectional view taken along the line 4-4 in FIG. 2. The flange 43 of the fuel injection device 40 is dropped into the left and right grooves 32, 33 so that the fuel injection device 40 is held on the left and right holding pieces 28, 29.
Holes 5 of the left and right levers 53 and 54
5 and 56, the outer claws 34 of the left and right holding pieces 28 and 29,
35 shows a state of engagement.

The left and right levers 53 and 54 are connected to the power coupler 5.
0 is formed of a flexible member, so that the left and right connecting portions 5 can be formed.
The hinges 3a and 54a are opened and closed in a hinge shape by elastically deforming them. The left and right levers 53 and 54 have ribs 53a and 54a (only the back side is shown) on both sides. The torsion spring 58 is a member having a central portion wound around a pin 59, and the right and left holding pieces 28, 29 are brought close to each other by the spring force of the left and right levers 53, 54.
Is pressed from the outside to fix the fuel injection device 40 more securely.

The operation of the above described fixed composition of the fuel injection device will now be described. FIGS. 5A to 5C are operation diagrams for explaining a procedure for mounting the fuel injection device (first embodiment) according to the present invention. In (a), the fuel injection device 40 is moved as shown by the arrow to be inserted into the insertion hole 25 of the holder 23. In (b), the flanges 43 of the fuel injection device 40 are applied to the left and right tapered guide portions 30 and 31, and the flanges 43 are slid along the tapered guide portions 30 and 31 so that the left and right holding pieces 28 and 29 are moved by arrows. Open right and left like,. In (c), by dropping the flange 43 of the fuel injection device 40 into the left and right grooves 32, 33, the left and right holding pieces 28, 29 are closed as indicated by arrows, and the fuel injection device 40 is elastically sandwiched. As a result, the fuel injection device 4
0 can be fixed in the holder 23.

FIGS. 6 (a) to 6 (c) are action diagrams for explaining the procedure for mounting the power supply coupler (first embodiment) according to the present invention. In (a), the power supply coupler 50 is moved from above the fuel injection device 40 as shown by the arrow. In (b),
The lower ends of the left and right levers 53 and 54 are connected to the left and right holding pieces 2.
8 and 29, the left and right connecting portions 53a and 54a are elastically deformed so that the left and right levers 5a and 54a are elastically deformed.
3 and 54 are opened like arrows, and left and right claws 34 and 35 are opened.
Slide along.

In (c), the lower ends of the left and right levers 53 and 54 are brought closer to each other as indicated by arrows by the spring force of the torsion spring 58, and the holes 55 and 56 of the left and right levers 53 and 54 are formed.
With the right and left claws 34, 35. Since the spring force is applied, the holes 55 and 56 of the left and right levers 53 and 54 are not disengaged from the left and right claws 34 and 35, so that the power supply coupler 50 can be prevented from coming off. Further, since the left and right levers 53 and 54 press the left and right holding pieces 28 and 29 from outside by a spring force, the fuel injection device 40 can be securely fixed by the left and right holding pieces 28 and 29.

FIGS. 7A to 7C are operation diagrams for explaining the procedure for removing the power supply coupler (first embodiment) according to the present invention. In (a), the upper ends of the left and right levers 53 and 54 are pushed as shown by arrows, and the left and right connecting portions 53a and 54a are pressed.
The left and right levers 53 and 54 are elastically deformed.
Open the bottom of the box as shown by the arrow. In (b), the holes 55 and 56 of the left and right levers 53 and 54 are inserted into the left and right claws 34 and 3.
Extract from 5. In (c), the power supply coupler 50 is lifted up as shown by the arrow, and the insertion portion 51 of the power supply coupler 50 is inserted.
From the insertion port 45 of the fuel injection device 40. By simply pressing the upper ends of the left and right levers 53 and 54,
Since the power supply 54 can be easily opened, the power supply coupler 50 can be easily removed.

FIGS. 8A to 8C are plan views showing a state in which the fuel injection device according to the present invention is mounted on a holder.
(A) is an insertion port 4 formed in a rectangular shape as in FIG.
5 shows a state in which the long side of No. 5 is arranged parallel to the fuel pipe 22. The width L1 can be kept relatively small.
(B) shows that the long side of the insertion port 45 is connected to the fuel pipe 22.
The figure shows a state in which they are arranged orthogonally. The width L2 is larger than L1. (C) shows that the long side of the insertion port 45 is arranged orthogonal to the fuel pipe 22 and the holding pieces 28 and 29
Is shown along with the fuel pipe 22. Width L3 is smaller than L1 (ie, smallest)
can do. Further, by making the long side of the insertion port 45 perpendicular to the fuel pipe 22, L4 can be made relatively small, so that there is no possibility that the fixing structures of the adjacent fuel injection devices will interfere with each other. Therefore, in order to use the space effectively, the arrangement (c) is preferable. However, if the space has room, the arrangements (a) and (b) are also possible.

In the first embodiment, the left and right levers 5
The state in which the left and right levers 53 and 54 are opened and closed by elastically deforming the connecting portions 53a and 54a of the third and 54 has been described. As a modified example, the left and right levers 53 and 54 can be rotated to the insertion portion 51 via pins. The same effect can be obtained by connecting to.

In the first embodiment, the fixed structure of the fuel injection device in which the holder 23 is provided with a pair of left and right holding pieces 28 and 29 and the power supply coupler 50 is provided with a pair of left and right levers 53 and 54 is described. , Holding piece and lever each 2
The same effect can be obtained by providing the above plurality.
In this case, the number of tapered guides, grooves, and claws of the holding piece is also the number corresponding to the holding piece, and the number of holes or depressions of the lever is also the number corresponding to the lever.

Next, a second embodiment will be described. FIG. 9 is a sectional view of a fixing structure (second embodiment) of the fuel injection device according to the present invention. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. The fixing structure 70 of the fuel injection device extends left and right arms 72 and 73 from the power supply coupler 71, and holes 7 are provided at the tips of the left and right arms 72 and 73 respectively.
4,75 is opened.

When the power supply coupler 71 is inserted into the insertion port 45 of the fuel injection device 40, the holes 74,
The power coupler 71 can be prevented from coming off by engaging the hooks 75 with the claws 34 and 35 of the left and right holding pieces 28 and 29, respectively. As described above, the power supply coupler 71 is connected to the fuel injection device 4.
The power supply coupler 71 can be easily fixed simply by inserting the power supply coupler 71 into the zero insertion port 45.

Since the holes 74 and 75 of the arms 72 and 73 are opened to the outside, when the holes 74 and 75 of the right and left arms 72 and 73 are engaged with the left and right claws 34 and 35, the claws 3 are formed from the outside.
It is possible to confirm that the holes 74 and 75 are securely engaged with the claws 34 and 35 by looking at the holes 4 and 35. The arm 72,
The holes 74 and 75 formed in the lower part of the arm 73 can be replaced with depressions formed inside the arms 72 and 73.

Also, the ribs 72a, 72a, 73a, 73a (only the back side is shown) on both sides of the left and right arms 72, 73 are formed only at the base end without extending to the distal ends of the arms 72, 73. Therefore, the tips of the arms 72 and 73 can be opened outward. Therefore, the leading ends of the arms 72 and 73 are opened outward, the holes 74 and 75 are pulled out from the claws 34 and 35, and the power supply coupler 71 is lifted to pull out the insertion portion 76 from the insertion hole 45 of the fuel injection device 40. Can be.

In the second embodiment, the fixing structure of the fuel injector in which the power coupler 71 is provided with a pair of left and right arms 72 and 73 has been described. However, the same applies when two or more arms 72 and 73 are provided. The effect can be obtained. In this case, hole 7
The numbers 4, 75 also correspond to the numbers of the arms 72, 73.

FIG. 10 is a sectional view of a fixing structure (third embodiment) of a fuel injection device according to the present invention.
Shows a state where is attached to the holder 80. The third embodiment is characterized in that the positions of the claws 85 and 86 for locking the power coupler are aligned with the positions of the grooves 83 and 84 for dropping the flange 43. For this reason, the thickness of the holding pieces 81 and 82 can be made substantially uniform in the range of S where the holding pieces 81 and 82 are elastically deformed, so that the rigidity of the holding pieces 81 and 82 can be sufficiently secured.

In the third embodiment, the fixing structure of the fuel injection device provided with a pair of left and right holding pieces 81 and 82 of the holder 80 has been described. However, two or more holding pieces 81 and 82 may be provided. Similar effects can be obtained.

In the first to third embodiments, since the fuel inlet 42 is provided at an intermediate portion of the fuel injection device 40, the fuel pipe 22 for supplying the fuel to the fuel inlet 42 is connected to the intermediate portion of the fuel injection device 40. Part can be lowered. Therefore, since the holding pieces 28 and 29 for fixing the power supply coupler can be provided above the fuel pipe 22, the holding pieces 28 and 29 can be provided at any suitable positions. As a result, when the power coupler is inserted from above,
The power supply coupler can be securely fixed by the holding pieces 28 and 29.

On the other hand, the fixing structure of the fuel injection device according to the present invention can also be applied to a top feed type fuel injection device having a fuel inlet at the top. However, in this case, since the fuel pipe is provided above the fuel injection device, the holding piece is provided below the fuel pipe. For this reason, if the holding piece is disposed below the fuel passage that connects the fuel pipe to the fuel intake, the holding piece is hidden by the fuel passage. Even if the power supply coupler is inserted from above, the fuel passage is obstructed and the power supply coupler cannot be locked to the holding piece. Although it is possible to compensate for this problem by increasing the number of holding pieces, there is a concern that the configuration may be complicated.

[0041]

According to the present invention, the following effects are exhibited by the above configuration. According to the first aspect, simply by inserting the fuel injection device into the insertion hole for the fuel injection device, the fuel injection device can be fixed by elastically sandwiching the flange of the fuel injection device with the plurality of holding pieces. For this reason, it is not necessary to prepare a separate fixing member for fixing the fuel injection device, and the fixing time of the fuel injection device can be shortened. As described above, the fuel injection device can be fixed without using bolts. Therefore, even if the member on the insertion hole side is made of resin, there is no need to embed a nut for fastening the bolt in this member.
Therefore, when this member is recycled, it is not necessary to remove the nut, so that the workability of recycling can be improved.

According to the second aspect of the present invention, since the fuel inlet is provided at the intermediate portion of the fuel injection device, the fuel pipe for supplying the fuel to the fuel inlet can be lowered to the intermediate portion of the fuel injection device. Therefore, since the holding piece for fixing the power supply coupler can be provided above the fuel pipe, the holding piece can be provided at a suitable position. As a result, when the power coupler is inserted from above, the power coupler can be reliably fixed by the holding piece.

On the other hand, in the case of a top feed type fuel injection device having a fuel intake port at the upper portion, the fuel pipe is provided above the fuel injection device, so that the holding piece is provided below the fuel pipe. Will be provided. For this reason, if the holding piece is disposed below the fuel passage that connects the fuel pipe to the fuel intake, the holding piece is hidden by the fuel passage. Even if the power supply coupler is inserted from above, the fuel passage is obstructed and the power supply coupler cannot be locked to the holding piece. Although it is possible to compensate for this problem by increasing the number of holding pieces, there is a concern that the configuration may be complicated.

In the same manner as in the first aspect, the fuel injection device is inserted into the insertion hole for the fuel injection device, and the flange of the fuel injection device is elastically sandwiched by a plurality of holding pieces. Can be fixed. For this reason, it is not necessary to prepare a separate fixing member for fixing the fuel injection device, and the fixing time of the fuel injection device can be shortened. As described above, the fuel injection device can be fixed without using bolts. Therefore, even if the member on the insertion hole side is made of resin, there is no need to embed a nut for fastening the bolt in this member. Therefore, when this member is recycled, it is not necessary to remove the nut, so that the workability of recycling can be improved.

According to the third aspect of the present invention, the power coupler can be fixed so as not to fall out from the insertion hole only by inserting the power coupler into the insertion port of the fuel injection device. For this reason, it is not necessary to prepare a separate fixing member for fixing the power supply coupler, and the fixing time of the power supply coupler can be shortened. In addition, since the plurality of arms each have holes opened outwardly, the claws of the holding pieces can be seen from the outside, so that it is possible to confirm from outside that the holes are engaged with the claws of the holding pieces. it can.

According to the fourth aspect, the power coupler can be fixed so as not to fall out from the insertion hole only by inserting the power coupler into the insertion port of the fuel injection device. For this reason, it is not necessary to prepare a separate fixing member for fixing the power supply coupler, and the fixing time of the power supply coupler can be shortened. Further, the plurality of holding pieces can be pressed inward by bringing the plurality of levers closer to each other with the pressing force of the elastic member. As a result, the fuel injection device can be more reliably fixed. Further, since the plurality of levers are hinged, the plurality of levers can be easily opened. As a result, it becomes easy to remove the power supply coupler.
In addition, since the plurality of levers each have holes opened to the outside, the claws of the holding pieces can be seen from the outside, so that it is possible to confirm from outside that the holes are engaged with the claws of the holding pieces. it can.

According to the fifth aspect, since the insertion hole and the plurality of holding pieces of the fuel injection device are formed of synthetic resin, the plurality of holding pieces can be easily formed integrally with the insertion hole of the fuel injection device. By fixing the fuel injection device with the plurality of holding pieces, the fuel injection device can be fixed without using bolts. As a result, there is no need to embed a nut for fastening the bolt in the member on the insertion hole side. Therefore, when this member is recycled, it is not necessary to remove the nut, so that the workability of recycling can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a gasoline engine provided with a fuel injection device fixing structure (first embodiment) according to the present invention.

FIG. 2 is a perspective view of a fixing structure (first embodiment) of the fuel injection device according to the present invention.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;

FIG. 4 is a sectional view taken along line 4-4 in FIG. 2;

FIG. 5 is an operation diagram illustrating a procedure for mounting the fuel injection device (first embodiment) according to the present invention.

FIG. 6 is an operation diagram illustrating a procedure for mounting the power supply coupler (first embodiment) according to the present invention.

FIG. 7 is an operation diagram illustrating a procedure for removing the power supply coupler (first embodiment) according to the present invention.

FIG. 8 is a plan view showing a state where the fuel injection device according to the present invention is mounted on a holder.

FIG. 9 is a cross-sectional view of a fixing structure (second embodiment) of the fuel injection device according to the present invention.

FIG. 10 shows a fixing structure (third embodiment) of the fuel injection device according to the present invention.
Example) cross-sectional view

[Explanation of symbols]

20, 70: fuel injector fixing structure, 25: insertion hole, 28, 29: holding piece, 30, 31: guide part (tapered guide part), 32, 33: groove, 34, 35: claw, 40
... Fuel injection device, 41 ... Injection port, 42 ... Fuel intake, 4
3 ... Flange, 45 ... Inlet, 50,71 ... Power coupler, 53,54 ... Lever, 55,56,74,75 ...
Holes, 58: elastic members (torsion springs), 72, 73: arms.

Claims (5)

[Claims] 1. A fixing structure for a fuel injection device having an injection port at a lower portion, a flange at an upper portion, and an insertion port for a power supply coupler at an upper end to fix a fuel injection device having a cylindrical shape as a whole. A plurality of holding pieces are integrally formed on an edge of the holding piece so as to be elastically deformable, and a groove for accommodating a guide portion and the flange is provided on the inner surface of these holding pieces in order from top to bottom, and the plurality of guide portions are provided. A fixing structure for a fuel injection device, characterized in that the holding piece is opened by sliding the flange in the groove and the flange is dropped into the plurality of grooves, so that the fuel injection device is elastically sandwiched by the plurality of holding pieces. 2. The fixing structure for a fuel injection device according to claim 1, wherein the fuel injection device includes a fuel inlet at an intermediate portion. 3. A claw projecting from an outer surface of the holding piece, a plurality of arms are extended from a power coupler, holes are opened to these arms to open outward, and a power coupler is inserted into the insertion port. 3. The fixing structure for a fuel injection device according to claim 1, wherein the power supply coupler is prevented from coming off by engaging the holes of the plurality of arms with the claws of the holding piece. 4. A plurality of levers are hinged to the power supply coupler, and holes are opened to the outside of the lower portions of the plurality of levers, and the plurality of levers are opened. An elastic member for approaching is provided between a plurality of levers, and the plurality of holes are engaged with claws of a holding piece to prevent a power supply coupler from coming off. The fixing structure of the fuel injection device according to the above. 5. The fixing structure according to claim 1, wherein the insertion hole and the plurality of holding pieces of the fuel injection device are formed of a synthetic resin.