JP2018189012A - Fuel pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for well maintaining contact between a contact point of a driving circuit and a conductive member even when a flange is expanded.SOLUTION: A fuel pump includes a housing having an opening and storing a motor, the flange blocking the opening and having a fuel pipe communicated with the internal of the housing, the conductive member supported by the flange for supplying electric power to the motor, and the driving circuit supported at its position opposite to the conductive member by the flange and having the contact point opposite to the conductive member, the conductive member being elastically deformed while being pressed by the contact point.SELECTED DRAWING: Figure 3

Description

  The present specification relates to a fuel pump including a motor.

  Patent Document 1 discloses a fuel pump including a circuit for driving a motor. In a fuel pump, a circuit is supported by a lid that closes an opening provided in a housing that houses a motor. The lid has a discharge pipe communicating with the inside of the housing. The circuit is fastened to the lid by a metal screw that passes through a through hole provided in the circuit. The screw extends through the lid to the motor. The screw head is in contact with the contact on the circuit, and the tip of the screw is connected to the motor.

International Publication No. 2014/0555160

  The fuel pump expands due to swelling due to fuel, thermal expansion due to heat generated by the circuit, and the like. Since the material of each part constituting the fuel pump such as a lid supporting the circuit and a screw connecting the circuit and the motor is different, the degree of expansion of each part is different. As a result, due to the expansion of each part, an excessive load may be applied to the contact point between the screw and the circuit, or the screw and the contact point at the contact point may be separated.

  The present specification provides a technique for maintaining good contact between the contact of the drive circuit and the conductive member.

  A fuel pump disclosed in the present specification has an opening, a housing that houses a motor, a flange that closes the opening and has a fuel pipe that communicates with the inside of the housing, and a flange And a drive circuit that supplies electric power to the motor and a drive circuit that is supported by the flange at a position facing the conductive member and has a contact point facing the terminal. The conductive member may be elastically deformed by being pressed by the contact.

  In the above configuration, the conductive member supported by the flange is elastically deformed by being pressed by the contact of the drive circuit supported by the flange. When the flange is not expanded, the conductive member comes into contact with the contact point by a restoring force due to elastic deformation, and the contact between the conductive member and the contact point is maintained. On the other hand, in a situation where each part expands due to the use of the fuel pump, the conductive member is elastically deformed to maintain the contact between the conductive member and the contact. For this reason, the contact between a conductive member and a contact can be maintained favorably.

  The housing may have a pair of positioning walls facing each other with the drive circuit interposed therebetween. According to this configuration, the drive circuit can be arranged at a predetermined position by inserting the drive circuit between the pair of positioning walls.

  The part which protrudes from the flange of a contact and an electrically-conductive member may be covered with resin. According to this structure, a contact and said protruding part can be protected from the electric corrosion by a fuel.

  The above resin may be deformed following the deformation of the conductive member. According to this configuration, even when the contact and the protruding portion are covered with the resin, it is possible to suppress the elastic deformation of the conductive member from being hindered by the resin. For this reason, the contact between a conductive member and a contact can be maintained appropriately.

  The drive circuit may be accommodated in a ceramic case, and the drive circuit may be supported by the flange by contacting the case with the flange. The case may be exposed outside the fuel pump. According to this configuration, since the case is exposed to the fuel outside the fuel pump, heat generated from the drive circuit can be radiated to the fuel via the case. Thereby, cooling of a drive circuit can be accelerated | stimulated.

  The conductive member may include a conductive elastic portion fixed to the contact and a terminal portion supported by the flange and facing the contact and the elastic portion. The elastic part may be elastically deformed and arranged on the compression side between the contact point and the terminal part. According to this configuration, the contact between the conductive member and the contact can be maintained by the elastic portion that is elastically deformed toward the compression side.

  The conductive member may protrude from the flange, and may include a protrusion having a mountain-shaped portion that rises toward the contact point at the tip. The chevron portion may be pressed against the contact point so that the protruding portion is elastically deformed in a direction away from the drive circuit. According to this configuration, the contact between the conductive member and the contact can be maintained by the elastic deformation of the protrusion.

The perspective view of the electric pump of 1st Example is shown. FIG. 2 shows a cross-sectional view of the flange of the first embodiment in the plane II of FIG. 1. The longitudinal cross-sectional view of the electric pump of 1st Example in the III-III line of FIG. 2 is shown. The process of attaching a circuit package to a flange is shown. The cross-sectional view of the flange of 2nd Example is shown. The cross-sectional view of the flange of 3rd Example is shown. The cross-sectional view of the flange of 4th Example is shown. The cross-sectional view of the flange of 5th Example is shown. The longitudinal cross-sectional view of the electric pump of 5th Example in the IX-IX line of FIG. 8 is shown. The longitudinal cross-sectional view of the electric pump of 6th Example is shown. The longitudinal cross-sectional view of the electric pump of 7th Example is shown.

(First embodiment)
The fuel pump 10 of the first embodiment will be described with reference to FIGS. A plane II in FIG. 1 is a cross section passing through projecting portions 60a and 62a of input terminals 60 and 62 described later. A line III-III in FIG. 2 shows a longitudinal section passing through a protrusion 60a and an input contact 90 described later. FIG. 2 is drawn enlarged from the other drawings in consideration of easy viewing.

  The fuel pump 10 is installed, for example, in a fuel tank of a two-wheeled vehicle, and is used to supply fuel in the fuel tank to an engine. As shown in FIG. 1, the fuel pump 10 includes a housing 20, a flange 40, two input terminals 60 and 62, three output terminals 64, 66 and 68, and a circuit package 80. The housing 20 houses a motor 24 (see FIG. 3). The motor 24 rotates the impeller (not shown) of the pump. The housing 20 has an opening 22 on the upper side thereof. The opening 22 is closed by the flange 40. A space between the inner peripheral surface of the opening 22 and the outer peripheral surface of the flange 40 is sealed with a seal member (not shown). Note that the directions such as “up” and “down” used in the embodiments are used for convenience of explanation, and do not define the directions actually mounted on the vehicle. Moreover, in FIG. 1, illustration of the U-shaped member mentioned later is abbreviate | omitted.

  The flange 40 is a resin member. The flange 40 includes a flat plate portion 42, a discharge pipe 44, and a support portion 46. The flat plate portion 42 is inserted into the opening 22 of the housing 20 and closes the opening 22. The discharge pipe 44 penetrates the flat plate part 42 up and down. The upper end of the discharge pipe 44 is connected to a fuel pipe (not shown) connected to the engine. The lower end of the discharge pipe 44 is located in the housing 20. Here, as shown in FIG. 3, a suction pipe 26 communicating with the inside of the housing 20 is provided below the housing 20. The fuel sucked from the suction pipe 26 is pumped by the pump impeller rotated by the motor 24 and discharged from the discharge pipe 44. In FIG. 1, since the suction pipe 26 cannot be observed, its illustration is omitted.

  The support unit 46 supports the circuit package 80. The support portion 46 is provided on the upper surface of the flat plate portion 42 adjacent to the discharge pipe 44. A concave portion 48 is provided on the side surface of the support portion 46 opposite to the discharge pipe 44 side. The recess 48 is open on the upper side and on the side opposite to the discharge pipe 44 side. The circuit package 80 is inserted into the recess 48 from above. The circuit package 80 is supported by the support portion 46 by being inserted into the recess 48. Here, of the width of the circuit package in the horizontal direction perpendicular to the insertion direction in which the circuit package 80 is inserted into the recess 48, the pair of walls 48 a and 48 b facing each other in the longitudinal width direction position the circuit package 80. Functions as a positioning wall. Thereby, the circuit package 80 can be arrange | positioned in the determined position facing the five terminals 60-68.

  The two input terminals 60 and 62 are connected to an external power source (not shown). Each input terminal 60, 62 extends vertically, and its lower end is embedded in the support portion 46 (that is, each input terminal 60, 62 is supported by the support portion 46). The input terminals 60 and 62 are arranged to face each other with the recess 48 interposed therebetween. At the lower ends of the input terminals 60, 62, projecting portions 60 a, 62 a projecting from the side surface of the support portion 46 opposite to the discharge pipe 44 side are formed. Each protrusion 60a, 62a is bent toward the recess 48 as shown in FIG. The protrusions 60 a and 62 a face the circuit package 80 inserted into the recess 48.

  The three output terminals 64, 66, 68 electrically connect the drive circuit 82 in the circuit package 80 and the motor 24. Each output terminal 64, 66, 68 passes through the flat plate portion 42 in the vertical direction. Each output terminal 64, 66, 68 is supported by the flat plate portion 42. The output terminals 64, 66, and 68 are arranged at intervals. The upper ends of the output terminals 64, 66, 68 are opposed to the bottom surface of the recess 48 and are opposed to the circuit package 80 inserted into the recess 48.

  The circuit package 80 includes a drive circuit 82 and a case 84 that houses the drive circuit 82. The drive circuit 82 converts DC power supplied from an external power source into three-phase AC power suitable for driving the motor 24. The drive circuit 82 has six contacts. Two input contacts 90 and 92 are arranged on the upper side of the drive circuit 82 at positions facing the input terminals 60 and 62. The contact disposed between the input contacts 90 and 92 is an inspection contact and is not used during normal use. The two input contacts 90 and 92 are electrically connected to the input terminals 60 and 62, and DC power is input. Further, three output contacts 94, 96, 98 are arranged at positions below the drive circuit 82 and facing the output terminals 64, 66, 68. The three output contacts output three-phase AC power and are electrically connected to the three output terminals 64, 66 and 68. As a result, the DC power is supplied to the drive circuit 82 via the two input terminals 60 and 62 and the input contacts 90 and 92, converted into three-phase AC power by the drive circuit 82, and then the three outputs. The electric power is supplied to the motor 24 via the contacts 94, 96 and 98 and the three output terminals 64, 66 and 68.

  Case 84 is made of ceramic. Ceramic is a material excellent in thermal conductivity, heat resistance, and fuel resistance. The fuel resistance means that the property hardly changes even if the fuel is contacted for a long time. For example, the ceramic is alumina, silicon nitride, or the like. On the side surface of the case 84 opposite to the discharge pipe 44 side, the five contacts 90, 92, 94, 96, 98 of the drive circuit 82 and the contact for inspection are exposed. The case 84 covers a region of the entire surface of the drive circuit 82 other than the region where the five contacts 90, 92, 94, 96, 98 and the contact for inspection are exposed. The case 84 contacts the inner surface of the recess 48 of the support portion 46, so that the drive circuit 82 is supported by the support portion 46.

  The case 84 is exposed from the recess 48 on the upper surface and the side surface opposite to the discharge pipe 44 side. That is, the case 84 is exposed to the outside of the fuel pump 10. Thereby, the case 84 is exposed to the fuel in the fuel tank. The heat generated by the drive circuit 82 is transmitted to the fuel via the case 84. Cooling of the drive circuit 82 can be promoted. Further, the drive circuit 82 can be protected from corrosion by fuel by the ceramic case 84.

  As shown in FIGS. 2 and 3, the five terminals 60 to 68 are connected to the five contacts through the five U-shaped members. The U-shaped member is a member obtained by bending a conductive material (for example, metal) plate into a U-shape. As shown in FIG. 2, two U-shaped members 70 and 72 are disposed between the two input terminals 60 and 62 and the two input contacts 90 and 92. 2, a U-shaped member 76 is disposed between the output terminal 66 and the output contact 96. As illustrated in FIG. 3, a U-shaped member is provided between the output terminal 64 and the output contact 94. A member 74 is disposed. 2 and 3, the U-shaped member disposed between the output terminal 68 and the output contact 98 cannot be observed. The reference numerals of the U-shaped members are omitted. Each U-shaped member is disposed such that the U-shaped opening is located on the upper side. In the modification, the direction of the U-shaped opening of the U-shaped member is not limited. For example, at least a part of the U-shaped member may be arranged so that the U-shaped opening faces downward. It may be arranged so as to face in the horizontal direction.

  As shown in FIG. 4, the five U-shaped members are fixed to the five contacts of the drive circuit 82 by means such as solder. Each U-shaped member (for example, 70) is placed on the compression side between each conductive member (for example, 60) and each contact point (for example, 90) when the circuit package 80 is inserted into the recess 48 of the flange 40. Elastically deformed. Due to the restoring force of the elastic deformation, each U-shaped member comes into contact with each terminal, and the electrical connection between each terminal and each contact is maintained.

  The effect of the present embodiment will be described. The flange 40 expands by swelling due to exposure to fuel, thermal expansion due to heat generated by the drive circuit 82, or the like. For example, each of the output terminals 64 to 68 supported by the flat plate portion 42 of the flange 40 moves in a direction away from each output contact following the expansion of the flange 40. Each U-shaped member arranged between each output terminal and each output contact is deformed so as to be restored from elastic deformation when the output terminals are moved away from each other, that is, spread in the left-right direction in FIG. To do. For this reason, the contact between each U-shaped member and each output terminal can be favorably maintained without the U-shaped member and each output terminal being separated from each other. Moreover, the same effect can be acquired also about each U-shaped member arrange | positioned between each input terminal and each input contact.

(Correspondence)
The discharge pipe 44 is an example of a “fuel pipe”. For example, the flange 40 may be provided with a suction pipe instead of the discharge pipe. The output terminal and the U-shaped member facing the output terminal are examples of “conductive member”, and the output terminal and the U-shaped member are examples of “terminal portion” and “elastic portion”, respectively. The input terminal and the U-shaped member facing the input terminal are also examples of the “conductive member”, and the input terminal and the U-shaped member are also examples of the “terminal portion” and the “elastic portion”.

(Second embodiment)
Differences from the first embodiment will be described with reference to FIG. The same components as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted. In the third to seventh embodiments, which will be described later, the description is also omitted. As shown in FIG. 5, in this embodiment, the shape of the flange 240 is different from that of the first embodiment. Specifically, the shape of the support portion 246 is different from the shape of the support portion 46 of the first embodiment. The support part 246 includes a housing part 248 into which the circuit package 80 is inserted. The accommodating portion 248 is a hole that is open only on the upper side. A pair of walls 248 a and 248 b facing each other across the longitudinal width of the circuit package 80 among the four walls constituting the housing portion 248 function as positioning walls for positioning the circuit package 80. The protruding portions 60 a and 62 a of the input terminals 60 and 62 protrude from the pair of walls 248 a and 248 b to the inside of the accommodating portion 248 and face the input contacts 90 and 92 of the circuit package 80. The circuit package 80 is arranged in a position closer to the discharge tube 44 in the housing portion 248 and is disposed between the wall of the housing portion 248 near the discharge tube 44 and the five terminals.

  Further, in the present embodiment, after the circuit package 80 is inserted into the accommodating portion 248, the potting material 250 is filled between the accommodating portion 248 and the circuit package 80. The potting material 250 has a height that covers the input terminals 60 and 62, the U-shaped members 70 and 72, and the input contacts 90 and 92 disposed on the upper side, and is filled to a height below the upper surface of the circuit package 80. . The potting material 250 covers five contact points, five U-shaped members, two input terminal protrusions, and three output terminal upper ends, and does not cover the upper surface of the circuit package 80. Thereby, each contact, each U-shaped member, the protruding portion of each input terminal, and the upper end of each output terminal can be protected from electrolytic corrosion due to fuel. Further, since the upper surface of the circuit package 80 is exposed to the outside of the fuel pump 10, the upper surface is exposed to the fuel, and cooling of the drive circuit 82 is promoted.

  The potting material 250 is, for example, a resin such as fluorine rubber, fluorosilicone rubber, urethane, silicon, or epoxy. The potting material 250 is cured after being filled. The cured potting material 250 is deformed following the U-shaped member that is elastically deformed due to the expansion of the flange 40. The potting material 250 is selected in consideration of the mechanical characteristics of the U-shaped member. For example, the elastic modulus of the potting material 250 after curing is smaller than the elastic modulus of the U-shaped member. Thereby, even when the U-shaped member is covered with the potting material 250, the elastic deformation of the U-shaped member is prevented from being hindered by the potting material 250. Therefore, also in the present embodiment, as in the first embodiment, even when the flange 40 expands, the contact between each U-shaped member and each terminal can be favorably maintained.

(Third embodiment)
Differences from the first embodiment will be described with reference to FIG. As shown in FIG. 6, in this embodiment, the shape of the flange 340 is different from that of the first embodiment. Specifically, the shape of the support portion 346 is different from the shape of the support portion 46 of the first embodiment. As in the second embodiment, the support portion 346 includes a housing portion 348, and the housing portion 348 has a pair of walls 348 a and 348 b that face each other across the longitudinal width of the circuit package 80.

  Further, in this embodiment, the shapes of the input terminals 360 and 362 are different from those of the first embodiment. Projecting portions 360 a and 362 a projecting from the pair of walls 348 a and 348 b of the housing portion 348 are formed at the lower ends of the input terminals 360 and 362. Each of the protrusions 360a and 362a is disposed so as to be offset from the wall 348d on the side close to the discharge pipe 44 among the pair of walls 348c and 348d facing each other across the short width of the circuit package 80.

  In this embodiment, the circuit package 80 is inserted into the accommodating portion 348 so that the side surface where the five contacts are exposed faces the discharge pipe 44 side. The circuit package 80 is disposed between the far side wall 348c of the housing portion 348 and the five terminals. Thereby, the protrusions 360a and 362a face the input contacts 90 and 92 of the circuit package 80, and the output terminals face the output contacts.

  Also in this embodiment, as in the second embodiment, the potting material 350 is filled between the housing portion 348 and the circuit package 80 after the circuit package 80 is inserted into the housing portion 348. Thereby, also in a present Example, the effect similar to 2nd Example can be acquired.

(Fourth embodiment)
Differences from the first embodiment will be described with reference to FIG. As shown in FIG. 7, in this embodiment, the shape of the flange 440 is different from that of the first embodiment. Specifically, the shape of the support portion 446 is different from the shape of the support portion 46 of the first embodiment. The support portion 446 includes a recess 448 as in the first embodiment. The recess 448 has a pair of walls 448 a and 448 b that face each other across the longitudinal width of the circuit package 80. On the outside of the walls 448a and 448b, claws 448e and 448f for fixing a cover 452 that closes the recess 448 are provided. The cover 452 is fixed to the support portion 446 by the holes provided in the cover 452 being caught by the claws 448e and 448f.

  The cover 452 is a resin member. The cover 452 has a U-shaped cross section. Holes corresponding to the claws 448e and 448f are provided in a pair of opposing walls of the cover 452.

  Further, in this embodiment, the shapes of the input terminals 460 and 462 are different from those of the first embodiment. At the lower ends of the input terminals 460 and 462, protrusions 460a and 462a having the same shape as in the third embodiment are formed. As shown in FIG. 7, the protrusions 460 a and 462 b face the cover 452.

  Further, as shown in FIG. 7, in the present embodiment, the circuit package 80 faces the same direction as the third embodiment. The circuit package 80 is accommodated in the recess 448 from an opening located on the side opposite to the discharge pipe 44 side of the recess 448 with the side surface where the five contacts are exposed facing the bottom surface of the recess 448. Thereby, the five U-shaped members fixed to the five contact points come into contact with the five terminals. Then, after the circuit package 80 is accommodated in the recess 448, the cover 452 is attached. The circuit package 80 is pressed by the cover 452, and each U-shaped member is elastically deformed to the compression side. Thereby, also in a present Example, the structure similar to 3rd Example can be obtained.

  Also in this embodiment, after the circuit package 80 is inserted into the recess 448 and the cover 452 is attached, the potting material 450 is filled between the recess 448 and the circuit package 80. Thereby, also in a present Example, the effect similar to 2nd, 3rd Example can be acquired.

(5th Example)
Differences from the first embodiment will be described with reference to FIGS. As shown in FIGS. 8 and 9, in this embodiment, the shapes of the two input terminals 560 and 562 and the three output terminals are different from those in the first embodiment. Of the three output terminals, the two output terminals facing the two output contacts 94 and 96 are denoted by reference numerals 564 and 566, and the reference numerals of the output terminals facing the output contact 98 are omitted. ing.

  At the lower ends of the input terminals 560 and 562, similar to the input terminals 60 and 62 of the first embodiment, protrusions 560a and 562a that are bent toward the recess 48 are formed. Bending portions 560b and 562b are provided at the ends of the protruding portions 560a and 562a. The curved portions 560b and 562b are portions curved in a U shape so as to swell toward the circuit package 80 side. The curved portions 560b and 562b are opposed to the input contacts 90 and 92. Before the circuit package 80 is inserted into the recess 48, the tops of the curved portions 560b and 562b are located inside the recess 48. When the insertion of the circuit package 80 into the recess 48 is completed, the curved portions 560b, 562b is pressed by the input contacts 90 and 92. At this time, the protrusions 560 a and 562 a are elastically deformed in a direction away from the circuit package 80 at the base of the support portion 46. Due to the restoring force of elastic deformation, each curved portion comes into contact with each input contact, and the electrical connection between each input terminal and each input contact is maintained. It should be noted that a bent portion bent in a V shape so as to swell toward the circuit package 80 may be provided at the ends of the protrusions 560a and 562a, and a protrusion having a top located on the circuit package 80 side. May be provided. In general, the “mountain portion” located at the ends of the protrusions 560 a and 562 a may be any shape that rises toward the circuit package 80 than the protrusions 560 a and 562 a that protrude from the flange 40.

  Similarly to the curved portions 560b and 562b of the input terminals 560 and 562, curved portions are provided at the upper ends of the three output terminals. Hereinafter, the output terminal 564 that contacts the output contact 94 among the three output terminals will be described as a representative with reference to FIG. A curved portion 564 b that swells toward the circuit package 80 is provided at the upper end of the output terminal 564. The curved portion 564b faces the output contact 94. Before the circuit package 80 is inserted into the concave portion 48, the top of the curved portion 564b is located inside the concave portion 48. When the insertion of the circuit package 80 into the concave portion 48 is completed, the curved portion 564b 94 is pressed. At this time, the portion of the output terminal 564 protruding from the flat plate portion 42 is elastically deformed in the direction away from the circuit package 80 at the root of the flat plate portion 42. The electrical connection between the output terminal 564 and the output contact 94 is maintained by the elastic deformation restoring force.

  In this embodiment, the curved portion of the input terminal is bent around the vertical axis, and the curved portion of the output terminal is bent around the axis perpendicular to the vertical direction (that is, the horizontal direction). It has been. In the modification, an extension portion that extends vertically may be provided at the tip of the protruding portion of the input terminal, and a curved portion may be provided at the lower end of the extension portion. Both the curved portion of the input terminal and the curved portion of the output terminal may be bent around a horizontal axis.

  The effect of the present embodiment will be described. For example, even if the output terminal 564 supported by the flat plate portion 42 moves away from the output contact 94 following the expansion of the flange 40, the portion protruding from the flat plate portion 42 of the output terminal 564 is elastic. Deform to restore from deformation. For this reason, the contact between the bending portion 564b and the output contact 94 can be favorably maintained without the bending portion 564b and the output contact 94 being separated from each other. The same effect can be obtained for the input terminals 560 and 562 and the input contacts 90 and 92.

(Correspondence)
The protruding portions 560a and 562a and the curved portions 560b and 562b are examples of the “projecting portion” and the “mountain portion”, respectively. Further, the portion protruding from the flat plate portion 42 of the output terminal 564 and the curved portion 564b are examples of the “projection portion” and the “mountain portion”, respectively.

(Sixth embodiment)
With reference to FIG. 10, differences from the first embodiment will be described. As shown in FIG. 10, in this embodiment, lever-shaped contact members 670 and 674 may be employed instead of the U-shaped members 70 and 74 of the first embodiment. Each contact member 670, 674 rises higher than the height shown in FIG. 10 before the circuit package 80 is inserted into the recess 48. The contact members 670 and 674 are elastically deformed so as to be lowered to the height shown in FIG. 10 when the circuit package 80 is inserted into the recess 48. That is, the contact members 670 and 674 are elastically deformed to the compression side between the contacts 90 and 94 and the terminals 60 and 64. Similarly, a lever-shaped contact member is also fixed to contacts other than the contacts 90 and 94. In the present embodiment, the contact member is an example of an “elastic portion”.

(Seventh embodiment)
With reference to FIG. 11, differences from the fifth embodiment will be described. As shown in FIG. 11, in the present embodiment, among the three output terminals, the shapes of the two output terminals arranged on both outer sides are different from those in the fifth embodiment. The shape of the recess 748 is also different from that of the fifth embodiment. In the following, the output terminal 764 that contacts the output contact 94 will be described as a representative. In FIG. 11, in order to make the shape of the output terminal 764 easier to see, the position of the longitudinal section is moved from the position of FIG. 9 (that is, the position that passes through the output contact 94) to the position that does not pass through the output contact 94. Please note that.

  The upper end of the output terminal 764 is divided into a first protrusion 764b and a second protrusion 764c. The first protruding portion 764b extends in the vertical direction, and a curved portion similar to that of the fifth embodiment is provided at the upper end thereof. The curved portion faces the output contact 94. When the curved portion is pressed against the output contact 94, the first protruding portion 764 b is elastically deformed in a direction away from the circuit package 80 at the root of the flat plate portion 42. The electrical connection between the output terminal 764 and the output contact 94 is maintained by the restoring force of elastic deformation.

  On the other hand, the second protrusion 764c is a portion bent in an L shape along the lower surface of the circuit package 80 and the side surface on the discharge tube 44 side. The second protruding portion 764 c is disposed in the recess 48 with the L-shaped horizontal portion in contact with the top surface of the flat plate portion 42 and the L-shaped rising portion in contact with the bottom surface of the recess 48. The circuit package 80 is inserted between the L-shaped rising portion of the second protrusion 764 c and the first protrusion 764 b and is inserted into the recess 748. That is, the circuit package 80 is supported by the flange 40 by contacting the second projecting portion 664c.

  The effect of the present embodiment will be described. For example, even if the output terminal 764 moves following the expansion of the flange 40, the circuit package 80 inserted between the first protruding portion 764b and the second protruding portion 764c has a direction in which the output terminal 764 moves. Move in the same direction. For this reason, the elastic deformation of the first projecting portion 764b is maintained at the same level as when the flange 40 does not expand. The contact between the curved portion and the output contact 94 can be favorably maintained without the curved portion of the first protrusion 764b and the output contact 94 being separated from each other.

  As mentioned above, although the Example of the technique which this specification discloses was described in detail, these are only illustrations, and the fuel pump which this specification discloses includes what changed and changed the above-mentioned example variously. It is.

(1) In the first embodiment, the support portion 46 has a pair of walls 48 a and 48 b that face each other in the longitudinal width direction of the circuit package 80. However, for example, the support portion 46 may not have the pair of walls 48 a and 48 b but may have one wall facing the side surface of the circuit package 80 on the discharge pipe 44 side. In this modification, the “positioning wall” can be omitted.

(2) In each of the above embodiments, the case 84 of the circuit package 80 is exposed to the outside of the fuel pump 10 at least on the upper surface thereof. However, the circuit package 80 may not include the ceramic case 84 and the entire surface of the drive circuit 82 may be covered with resin or the like. In this modification, the “case” can be omitted.

(3) The “fuel pump” in this specification may be used for vehicles such as four-wheeled vehicles in addition to two-wheeled vehicles.

  The technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

10: Fuel pump 20: Housing 22: Opening 24: Motor 26: Suction pipes 40, 240, 340, 440: Flange 42: Flat plate part 44: Discharge pipes 46, 246, 346, 446: Support parts 48, 448, 548: Recesses 348c, 348d: walls 48a, 48b, 248a, 248b, 348a, 348b, 448a, 448b: walls (positioning)
60, 62, 360, 362, 460, 462, 560, 562: input terminals 60a, 62a, 360a, 362a, 460a, 462a, 560a, 562a: protrusions 64 to 68, 564, 764: output terminals 70, 72, 74, 76: U-shaped member 80: Circuit package 82: Drive circuit 84: Cases 90, 92: Input contacts 94, 96, 98: Output contacts 248, 348: Housing portions 250, 350, 450: Potting materials 448e, 448f: Claw 452: Cover 560b, 562b: Curved portion 670, 674: Contact member 764b: First protrusion 764c: Second protrusion

Claims (7)

A housing having an opening and containing a motor;
A flange having a fuel pipe closing the opening and communicating with the interior of the housing;
A conductive member supported by the flange and supplying power to the motor;
A drive circuit supported by the flange at a position facing the conductive member and having a contact point facing the conductive member;
The fuel pump, wherein the conductive member is elastically deformed by being pressed by the contact.   The fuel pump according to claim 1, wherein the housing has a pair of positioning walls facing each other with the drive circuit interposed therebetween.   The fuel pump according to claim 1, wherein a portion of the contact and the conductive member that protrudes from the flange is covered with resin.   The fuel pump according to claim 3, wherein the resin deforms following the deformation of the conductive member. The drive circuit is housed in a ceramic case,
When the case contacts the flange, the drive circuit is supported by the flange;
The fuel pump according to any one of claims 1 to 4, wherein the case is exposed to the outside of the fuel pump. The conductive member is
A conductive elastic portion fixed to the contact;
A terminal portion supported by the flange and facing the contact point and the elastic portion;
The fuel pump according to any one of claims 1 to 5, wherein the elastic portion is elastically deformed and disposed between the contact and the terminal portion on the compression side. The conductive member protrudes from the flange, and includes a protruding portion having a mountain-shaped portion raised toward the contact at the tip,
The fuel pump according to any one of claims 1 to 5, wherein the mountain-shaped portion is pressed against the contact point so that the protruding portion is elastically deformed in a direction away from the drive circuit.

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