WO2014030308A1 - 液面検出装置、及び液面検出装置の製造方法 - Google Patents
液面検出装置、及び液面検出装置の製造方法 Download PDFInfo
- Publication number
- WO2014030308A1 WO2014030308A1 PCT/JP2013/004702 JP2013004702W WO2014030308A1 WO 2014030308 A1 WO2014030308 A1 WO 2014030308A1 JP 2013004702 W JP2013004702 W JP 2013004702W WO 2014030308 A1 WO2014030308 A1 WO 2014030308A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wall
- liquid level
- terminal
- level detection
- detection device
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
- G01F23/38—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements using magnetically actuated indicating means
Definitions
- the present disclosure relates to a liquid level detection device that detects the height of a liquid level and a method of manufacturing the liquid level detection device.
- a structure installed at a position soaking in a liquid such as fuel stored in a fuel tank of an automobile has a seal structure for preventing liquid such as fuel from entering the inside.
- a connector disclosed in Patent Document 1 includes a first molded body, a plurality of terminals that pass through the first molded body and project outside, and a first molded body. And a second molded body covering the terminal. And in the recessed part for sealing agent filling provided in the 1st molded object, the sealing agent is filled around the terminal.
- the seal structure in the connector of Patent Document 1 is formed by filling a large amount of sealant into the sealant filling recess. Therefore, the manufacturing process of the connector is complicated due to including the step of filling such a large amount of sealing agent. If the amount of the sealing agent filled in the concave portion for filling the sealing agent is reduced, the reliability of the function of the sealing agent that prevents the liquid from entering the first molded body may not be ensured.
- the present disclosure has been made in view of the above problems, and an object of the present disclosure is to provide a liquid level detection device capable of effectively suppressing liquid intrusion along a terminal and a manufacturing method thereof with a simple configuration. It is in.
- the present disclosure provides a liquid level detection apparatus that detects the height of a liquid level, and includes a wall part, a terminal, a covering part, and a seal film.
- the terminal has a protruding portion protruding through the wall portion in a predetermined protruding direction.
- the covering portion covers the wall portion and the protruding portion.
- the sealing film covers a corresponding portion of the outer peripheral surface of the protruding portion in the covering portion, and connects between the corresponding portion of the outer peripheral surface and the wall portion, and The film thickness at the corresponding site increases as it approaches the wall.
- the present disclosure provides a method for manufacturing a liquid level detection device.
- a subassembly including a wall portion and a terminal having a protruding portion that protrudes through the wall portion in a predetermined protruding direction is formed.
- a sealing material dissolved in a solvent to be in a liquid state is applied to the wall portion and the protruding portion.
- a seal film is formed in which the film thickness at the corresponding part increases as the wall part approaches.
- part of the said outer peripheral surface of the said terminal is shape
- FIG. 1 is a front view of a liquid level detection device according to a first embodiment of the present disclosure.
- 2 is a cross-sectional view taken along line II-II in FIG.
- FIG. 3 is an enlarged view enlarging the vicinity of the first seal film and the second seal film in the first embodiment.
- 4 is a cross-sectional view taken along line IV-IV in FIG.
- FIG. 5 is a diagram schematically showing a change in film thickness on the ridge line of the terminal, and is a cross-sectional view taken along the line VV of FIG.
- FIG. 6 is a perspective view of the vicinity of the seal film in the first embodiment.
- FIG. 7 is a flowchart showing a method for manufacturing the liquid level detection device in the first embodiment.
- FIG. 7 is a flowchart showing a method for manufacturing the liquid level detection device in the first embodiment.
- FIG. 8A is a schematic diagram illustrating a coating process included in the manufacturing method of the liquid level detection device in the first embodiment
- FIG. 8B is a schematic diagram illustrating a baking process in the first embodiment
- FIG.8 (c) is the schematic which shows the outer case shaping
- FIG. 9 is a longitudinal sectional view of a housing according to the second embodiment of the present disclosure.
- FIG. 10 is a longitudinal sectional view of a housing according to the third embodiment of the present disclosure.
- FIG. 11 is a schematic diagram illustrating a modification of the first wall portion of the first embodiment.
- FIG. 12 is a schematic diagram illustrating another modification of the first wall portion of the first embodiment.
- the liquid level detection device 100 As shown in FIG. 1, the liquid level detection device 100 according to the first embodiment of the present disclosure is installed in a fuel tank (container) 90 that stores fuel as a liquid at a position where the fuel is immersed.
- the liquid level detection device 100 detects the height of the liquid level 91 of the fuel stored in the fuel tank 90 while being held by the fuel pump module 93.
- the liquid level detection device 100 includes a housing 20, a float 60, a magnet holder 50, and a Hall IC 70.
- the housing 20 as a fixed body is fixed and attached by fitting from the upper side of FIG. 1 to a mounting portion 94a provided on the peripheral wall 94 of the sub tank of the fuel pump module 93.
- the housing 20 includes an inner case 21, a plurality of terminals (three terminals in the present embodiment) 35, and an outer case 31.
- the inner case 21 is made of a resin material such as polyphenylene sulfide (PPS) resin.
- PPS polyphenylene sulfide
- the inner case body 22 in the inner case 21 includes a bottom wall 26a formed in a rectangular plate shape, and a peripheral wall (side wall) 26b extending in a direction perpendicular to the plane of the bottom wall 26a along the outer edge portion of the bottom wall 26a.
- the inner case main body 22 includes an inner shaft portion 23, a storage chamber (sensor storage chamber or detection element storage chamber) 24, and a first wall portion 25.
- the longitudinal direction of the bottom wall 26a is defined as the vertical direction VD
- the direction substantially orthogonal to the longitudinal direction along the bottom wall 26a is defined as the width direction WD (see FIG. 1).
- the thickness direction of the bottom wall 26a is defined as a thickness direction TD.
- the inner shaft portion 23 protrudes from the bottom wall 26a along the thickness direction TD.
- the inner shaft portion 23 is provided on the side opposite to the peripheral wall 26b with the bottom wall 26a interposed therebetween.
- the accommodation chamber 24 is a space for accommodating the Hall IC 70.
- the storage chamber 24 is formed inside the inner shaft portion 23.
- the first wall portion 25 is a part of the peripheral wall 26b and is located above the inner shaft portion 23 in the vertical direction VD.
- the first wall portion 25 extends in a plate shape along the width direction WD.
- the first wall portion 25 is formed with three through holes 25a that open to the wall surface 25b.
- the through holes 25a are openings for allowing the terminal 35 to pass through, and are formed at equal intervals in the width direction WD.
- the first wall portion 25 extends from each terminal 35 in a direction substantially orthogonal to each terminal 35 penetrating the corresponding through hole 25a. More specifically, the first wall portion 25 is in contact with each terminal 35 and continuously surrounds the outer peripheral side of each terminal 35 over the entire circumference. That is, the first wall 25 extends seamlessly over the entire circumference of each terminal 35 in the circumferential direction.
- the terminal 35 is formed in a band shape with a conductive material such as bronze.
- the three terminals 35 are embedded in the inner case main body 22.
- a cross section perpendicular to the longitudinal direction in each terminal 35, that is, a cross section of each terminal 35 has a rectangular shape.
- Each terminal 35 passes through the first wall portion 25 by passing through a corresponding one of the three through holes 25a. Further, each terminal 35 has a protruding portion 36 and a connecting portion (base end portion) 37.
- the protruding portion 36 is formed by a portion extending from the connecting portion 37 of the terminal 35 and protruding from the first wall portion 25 to the outside of the inner case 21.
- the protrusion 36 protrudes upward (hereinafter referred to as “protrusion direction PD”) along the vertical direction VD.
- the vicinity of the tip portion 36 b in the protruding direction PD in the protruding portion 36 is exposed to the outside of the housing 20.
- the proximal end portion 36 a that is closer to the first wall portion 25 than the distal end portion 36 b is covered with the outer case 31.
- the connecting portion 37 is formed by a portion accommodated inside the inner case main body 22 in the terminal 35.
- the connecting portion 37 is located on the opposite side of the distal end portion 36 b in the longitudinal direction of the terminal 35.
- the connection unit 37 is connected to the Hall IC 70.
- the outer case 31 is formed of a resin material such as PPS resin.
- the outer case 31 accommodates the inner case 21 by being formed so as to cover the outer side of the inner case 21.
- the outer case 31 has an outer shaft portion 32 and a covering portion 33.
- the outer shaft portion 32 is formed in a cylindrical shape and covers the outer side of the inner shaft portion 23.
- the axial direction of the outer shaft portion 32 extends in the thickness direction TD.
- the outer shaft portion 32 is rotatably fitted to a magnet holder 50 as a rotating body, thereby rotatably supporting the holder 50.
- the covering portion 33 is formed along the projecting direction PD of the first wall portion 25 and extends along the width direction WD.
- the covering portion 33 protects the first wall portion 25 and the base end portion 36a from the fuel by covering them from both sides in the thickness direction TD.
- the float 60 is formed of a material having a specific gravity smaller than that of a fuel such as foamed ebonite.
- the float 60 can float on the liquid level 91 of the fuel.
- the float 60 is supported by the magnet holder 50 via the float arm 65.
- the float arm 65 is made of a metal material such as stainless steel, and is inserted into a through hole 61 formed in the float 60.
- the magnet holder 50 shown in FIGS. 1 and 2 is formed in a disk shape from a resin material or the like.
- the magnet holder 50 is formed with a fixed portion 52 and a bearing portion 53.
- two magnets 51 are accommodated in the magnet holder 50.
- the magnet holder 50 is integral with the magnet 51 and rotates relative to the housing 20 so as to follow the liquid level 91.
- the fixing portion 52 is formed on the top surface of the magnet holder 50 that faces away from the housing 20.
- the fixing portion 52 holds the float arm 65.
- the bearing portion 53 is provided at a central portion in the radial direction of the magnet holder 50.
- a cylindrical hole is formed in the bearing portion 53 along the axial direction of the magnet holder 50.
- the bearing portion 53 is fitted on the outer shaft portion 32.
- the two magnets 51 are arranged so as to face each other with the bearing portion 53 interposed therebetween, thereby forming a magnetic flux that passes through the Hall IC 70 accommodated in the accommodation chamber 24.
- the Hall IC 70 has a main body 71 and three lead wires 72.
- the main body 71 is accommodated in the accommodation chamber 24 so as to be sandwiched between the two magnets 51.
- Each lead wire 72 extends from the main body portion 71 and is connected to the connection portion 37 of the corresponding terminal 35.
- the Hall IC 70 receives a magnetic field action from the magnet 51 in a state where a voltage is applied to the main body 71, thereby generating a voltage proportional to the density of the magnetic flux passing through the Hall IC 70.
- the voltage generated in the Hall IC 70 is measured by an external device via the corresponding lead wire 72 and the corresponding terminal 35. That is, the Hall IC 70 is electrically connected to an external device through the three terminals 35.
- the inner case 21 of the liquid level detection device 100 has a plurality of dam wall bodies 27 (three dam wall bodies 27 in the present embodiment) as convex portions.
- the liquid level detection device 100 is provided with a first seal film 40 and a second seal film 45.
- the dam wall 27 shown in FIG. 3 has a rectangular parallelepiped shape and is provided in the covering portion 33. Each dam wall 27 is separated from the inner case main body 22 in the projecting direction PD of the projecting portion 36.
- the dam wall body 27 is provided for each terminal 35 and is attached to each of the three terminals 35. Two dam wall bodies 27 adjacent to each other among the three dam wall bodies 27 are separated from each other.
- Each dam wall body 27 is formed with a terminal passage hole 27a, a second wall portion 28, and a third wall portion 29.
- the terminal passage hole 27a is a through hole penetrating the dam wall body 27 in the vertical direction VD.
- the terminal passage hole 27 a is connected from one of the second wall portion 28 and the third wall portion 29 to the other.
- the opening shape of the terminal passage hole 27 a that opens to the wall surface 28 b of the second wall portion 28 and the wall surface 29 b of the third wall portion 29 has a rectangular shape corresponding to the cross-sectional shape of the protruding portion 36. Therefore, in the terminal 35 inserted in each terminal passage hole 27a, each protrusion 36 is fitted to the inner wall surface of the corresponding terminal passage hole 27a.
- the second wall portion 28 and the third wall portion 29 are located apart from the first wall portion 25 in the protruding direction PD of the protruding portion 36.
- the second wall portion 28 is formed by an outer wall surface facing the protruding direction PD among a plurality of outer wall surfaces forming the weir wall body 27.
- the third wall portion 29 is formed by an outer wall surface facing a direction opposite to the protruding direction PD among a plurality of outer wall surfaces forming the dam wall body 27.
- the third wall portion 29 faces the first wall portion 25 in the vertical direction VD.
- the 2nd wall part 28 and the 3rd wall part 29 protrude from the protrusion part 36 penetrated by the terminal passage hole 27a in the direction which cross
- the first seal film 40 and the second seal film 45 are embedded in the covering portion 33. That is, the covering portion 33 is in contact with the seal films 40 and 45 and extends seamlessly over the entire circumference of the seal films 40 and 45 in the circumferential direction. In other words, the covering portion 33 covers the periphery of the portion extending from the dam wall body 27 in the base end portion 36 a of the protruding portion 36 via the seal films 40 and 45. Further, part of the sealing films 40 and 45 on the wall portions 25, 28 and 29 adjacent to the holes 25 a and 27 a are held between the wall portions 25, 28 and 29 and the covering portion 33 in the protruding direction PD. Has been.
- a part of the sealing films 40 and 45 extends radially outward from the proximal end portion 36a of the protruding portion 36 along the wall portions 25, 28, and 29, and the film thickness from the surface of the proximal end portion 36a in the radial direction is increased. It increases on the walls 25, 28 and 29.
- Each of the sealing films 40 and 45 is configured to prevent the fuel that enters the covering portion 33 through the terminals 35 from entering the inner case body 22 from the gap between the first wall portion 25 and the terminal 35. is there.
- the first seal film 40 shown in FIGS. 3 to 6 is formed between the first wall portion 25 and the third wall portion 29 along the protruding portion 36.
- the first seal film 40 includes an outer case contact surface (contact surface) 42 in close contact with the covering portion 33, a terminal contact surface 43 in close contact with the protruding portion 36, and an inner case in close contact with the first wall portion 25.
- a contact surface 44 a and a weir wall body contact surface 44 b in close contact with the third wall portion 29 are formed.
- the first seal film 40 connects between a corresponding portion 36c1 of the outer peripheral surface (that is, four side surfaces of the protrusion 36) 36c of the protrusion 36 and a wall surface (also referred to as an end surface) 25b of the first wall 25.
- the main film portion 41a continuously formed, the corresponding portion 36c1 of the outer peripheral surface 36c of the projecting portion 36, and the wall surface (also referred to as end surface) 29b of the third wall portion 29 are continuously connected.
- the auxiliary film portion 41b is formed.
- the main membrane portion 41 a covers a gap generated between the first wall portion 25 and the terminal 35.
- the outer case contact surface 42 is separated from the terminal contact surface 43 as it approaches the first wall portion 25 along the terminal 35.
- the film thickness of the first seal film 40 in the main film portion 41 a gradually increases as the film approaches the first wall portion 25.
- the auxiliary membrane portion 41b covers a gap generated between the third wall portion 29 and the protruding portion 36.
- the outer case contact surface 42 is separated from the terminal contact surface 43 as it approaches the third wall portion 29 along the terminal 35.
- the film thickness of the first seal film 40 in the auxiliary film portion 41 b gradually increases as it approaches the third wall portion 29.
- the second seal film 45 shown in FIG. 3 is a seal film different from the first seal film 40, and is formed along the protrusion 36 in the protrusion direction PD from the second wall 28.
- the second seal film 45 is continuously formed so as to connect between a corresponding portion 36c2 of the outer peripheral surface 36c of the protruding portion 36 and a wall surface (also referred to as an end surface) 28b of the second wall portion 28.
- a gap formed between the two wall portions 28 and the protruding portion 36 is covered.
- the second seal film 45 includes an outer case contact surface (contact surface) 46 in close contact with the covering portion 33, a terminal contact surface 47 in close contact with the protruding portion 36, and a weir in close contact with the second wall portion 28.
- a wall contact surface 48 is formed.
- the outer case contact surface 46 is separated from the terminal contact surface 47 as it approaches the second wall portion 28 along the terminal 35. Thereby, the film thickness of the second seal film 45 gradually increases as it approaches the second wall portion 28.
- step S101 of FIG. 7 first, a mold in which a cavity corresponding to the shape of the inner case 21 is formed is prepared, and each terminal 35 is fixed in the cavity. Then, the melted PPS resin is filled in the cavity. By such insert molding, the inner case 21 in which the terminal 35 is embedded is formed. In addition, each terminal 35 is embedded in the inner case 21 in a state of penetrating the first wall portion 25 and the dam wall body 27, whereby the protruding portion 36 is provided.
- the main body 71 (see FIG. 2) of the Hall IC 70 is accommodated in the accommodation chamber 24 (see FIG. 2) formed in the inner case main body 22.
- the lead wire 72 (refer FIG. 2) is connected to each connection part 37 located in the inner case main body 22 in each terminal 35 by welding. Thereby, the subassembly 200 is formed.
- Primer 49 is applied to the range over wall surface 29b. Further, the primer 49 is applied in a range from the protruding portion 36 to the wall surface 28b of the second wall portion 28.
- the primer 49 applied in the above application step is obtained by making a sealing material such as hydrin rubber (for example, epichlorohydrin rubber) into a liquid state with a solvent such as toluene.
- the applied primer 49 has a protruding shape and a raised shape with respect to the wall surfaces 25b, 28b, 29b of the first to third wall portions 25, 28, 29 due to its surface tension.
- the primer 49 applied in the application process is heated or left at room temperature to evaporate toluene or the like as a solvent. After that, specifically, the primer 49 is heated for about 30 minutes at a temperature of about 150 degrees Celsius for baking.
- the hydrin rubber is cured by being pulled by the protrusion 36 and the first to third wall portions 25, 28, and 29 by surface tension, and becomes a solid state. Then, the film thickness of each sealing film 40, 45 gradually increases toward the first to third wall portions 25, 28, 29.
- the film thickness of each of the seal films 40 and 45 on the ridge line 39 of the terminal 35 gradually increases as it approaches the first to third wall portions 25, 28 and 29. Accordingly, the seal films 40 and 45 are not lost even in the corner portions 38 (see also FIGS. 4 to 6) on the ridge 39 where the film thicknesses of the seal films 40 and 45 tend to be thin. Can be covered.
- the air bubbles contained in the primer 49 are deposited on the outer surfaces to be the outer case contact surfaces 42 and 46.
- minute irregularities 49a (partially and schematically shown in FIG. 6) are formed over the entire surface of the outer case contact surfaces 42 and 46 of the seal films 40 and 45 that have completed the baking process.
- the surface roughness of the unevenness 49a of the outer case contact surfaces 42, 46 is larger (rougher) than the surface roughness of the inner case body 22, for example.
- a mold 80 in which a cavity 81 corresponding to the shape of the outer case 31 is formed is prepared, and each of the seal films 40 and 45 is formed.
- the subassembly 200 including the formed inner case 21 and the terminal 35 is fixed in the cavity 81.
- the melted PPS resin is filled in the cavity 81.
- the housing 20 in which the inner case 21, the Hall IC 70, and a part of the terminal 35 are embedded is formed.
- the housing 20 in which a part of the inner case 21, the Hall IC 70, and the terminal 35 is embedded is also called a sensor assembly. Note that the PPS resin filled around the lead wire 72 of the Hall IC and the connection portion 37 of the terminal 35 in the inner case body 22 of FIG. 2 is omitted to show the internal structure of the inner case body 22. It is.
- the melted PPS resin enters the numerous minute irregularities 49a (see FIG. 6) formed on the outer case contact surfaces 42 and 46.
- the seal films 40 and 45 are not easily displaced with respect to the covering portion 33 that is in contact.
- step S106 of FIG. 7 the magnet holder 50 shown in FIG. 1 and the float arm 65 holding the float 60 are sequentially assembled to the housing 20 formed by the outer case molding process.
- the liquid level detection apparatus 100 is completed by the above assembly process.
- the film thickness of the first seal film 40 on the ridge line 39 is thicker from the outer peripheral surface 36 c of the protrusion 36 to the first wall 25. Therefore, even a small amount of sealing material can prevent the fuel from entering. Therefore, the liquid level detection device 100 capable of effectively suppressing the intrusion of the liquid into the inner case 21 without using a structure that causes a complicated manufacturing process is realized.
- the second seal film 45 prevents the fuel from entering the vicinity of the inner case main body 22 through the gap between the weir wall body 27 and the protruding portion 36.
- the auxiliary membrane portion 41 b of the first seal membrane 40 also functions to prevent the fuel from entering the vicinity of the inner case main body 22 through the gap between the weir wall body 27 and the protruding portion 36.
- the intrusion of fuel into the vicinity of the inner case main body 22 is prevented by the second seal film 45 and the auxiliary film portion 41b, whereby the infiltration of fuel into the inner case main body 22 is further reliably suppressed. .
- the film thickness of the second seal film 45 increases as it approaches the second wall part 28, the film thickness of the part covering the gap between the second wall part 28 and the protruding part 36 is sufficiently secured. Can be done. Furthermore, since the film thickness of the auxiliary film part 41b increases as it approaches the third wall part 29, the film thickness of the part covering the gap between the third wall part 29 and the protruding part 36 can be sufficiently ensured. . Therefore, the functions of the seal films 40 and 45 that prevent the fuel from entering the vicinity of the inner case main body 22 are exhibited with high reliability.
- the thickness of the portion covering the corner portion 38 is sufficiently secured.
- the sealing films 40 and 45 having gradually increasing film thicknesses are applied to the protrusions 36 having a polygonal cross section such as a rectangular shape, thereby preventing the fuel from entering the inner case body 22. The function can be demonstrated effectively.
- the seal films 40 and 45 are unlikely to be peeled off from the first to third wall portions 25, 28, 29 and the protruding portion 36 by the action of the unevenness 49 a. Therefore, the reliability of the seal films 40 and 45 is further improved.
- the second seal film 45 can stably exhibit the function of preventing the fuel from entering the vicinity of the inner case main body 22.
- each of the seal films 40 and 45 has the first to third walls.
- a shape in which the film thickness increases as it approaches the portions 25, 28, and 29 can be obtained. Therefore, the seal films 40 and 45 can suppress the intrusion of fuel into the inner case main body 22.
- the first seal film 40 in the coating process and the baking process, it is possible to reliably avoid complication of processes related to the production of the liquid level detection device 100.
- the second embodiment of the present disclosure shown in FIG. 9 is a modification of the first embodiment.
- the dam wall body 27 (see FIG. 2) and the second seal film 45 (see FIG. 2) of the first embodiment are omitted.
- the seal film (first seal film) 240 of the second embodiment is similar to the main film portion 41a (see FIG. 2) of the first embodiment, and the first wall portion 25 of the inner case main body 222 of the inner case 221. Extends in the protruding direction PD along the protruding portion 36.
- the seal film 240 has a shape that gradually increases the film thickness on the ridge line 39 as it approaches the first wall portion 25, and covers a gap generated between the first wall portion 25 and the protruding portion 36.
- the sealing film 240 according to the second embodiment described so far has a simpler configuration than the first sealing film 40 according to the first embodiment (see FIG. 2). Therefore, complication of the process for manufacturing the liquid level detection device can be further suppressed.
- the film thickness of the portion covering the gap between the first wall portion 25 and the terminal 35 can be sufficiently ensured especially on the ridge line 39. Therefore, the reliability of the function of the seal film 240 that prevents the fuel from entering the inner case 221 can be sufficiently ensured. Therefore, even in the liquid level detection device according to the second embodiment, the effect of suppressing the intrusion of fuel into the inner case 221 can be realized while avoiding complication of processes related to the manufacture of the device.
- the third embodiment of the present disclosure shown in FIG. 10 is another modification of the first embodiment.
- the first seal film 40 (see FIG. 3) of the first embodiment is omitted from the liquid level detection device according to the third embodiment. Therefore, the seal film (second seal film) 340 is substantially the same as the second seal film 45 (see FIG. 3) of the first embodiment.
- the infiltration of fuel into the vicinity of the inner case main body 22 through the gap between the dam wall body 27 and the protruding portion 36 can be prevented by the seal film 340 covering the gap. Therefore, even if the sealing film 340 does not directly cover the gap between the first wall portion 25 and the terminal 35, it becomes possible to suppress the intrusion of fuel into the inner case main body 22.
- the sealing film 340 has a simpler configuration than the first sealing film 40 according to the first embodiment (see FIG. 2). Therefore, complication of the process for manufacturing the liquid level detection device can be further suppressed. Therefore, even in the liquid level detection device according to the third embodiment, the effect of suppressing the intrusion of fuel into the inner case main body 22 is exhibited while avoiding the complexity of the process related to the manufacture of the device. .
- the wall surface 25 b of the first wall portion 25 extends from the terminal 35 in a direction substantially orthogonal to the terminal 35.
- the angle formed by the wall surface 25b of the first wall portion 25 with respect to the terminal 35 may be changed as appropriate.
- the angle formed by the wall surface 425a of the first wall portion 425 with respect to the terminal 35 may be an acute angle.
- the angle formed by the wall surface 525a of the first wall portion 525 with respect to the terminal 35 may be an obtuse angle.
- the wall surface 525a of the first wall portion 525 at an obtuse angle, the workability of applying the primer 49 in the vicinity of the first wall portion 525 and the terminal 35 in the application step can be facilitated.
- the wall surface 28 b of the second wall portion 28 and the wall surface 29 b of the third wall portion 29 in the first embodiment may also be changed so as to form an acute angle or an obtuse angle with respect to the terminal 35.
- the wall surface 25b of the first wall portion 25 of the second embodiment and the wall surface 28b of the second wall portion 28 of the third embodiment are similarly changed to form an acute angle or an obtuse angle with respect to the terminal 35. Also good.
- the cross section of the terminal 35 is formed in a rectangular shape.
- the shape of the terminal may be changed as appropriate.
- the terminal may have an elliptical cross section.
- the cross section of the terminal may be a triangular shape or a polygonal shape such as a pentagon or more.
- the ridgeline 39 in such a terminal is a location where the cross-sectional contour shape changes abruptly compared to other portions. That is, if the terminal has an elliptical cross section, the ridge line is formed along both ends in the major axis direction. If the terminal has a polygonal cross section, the ridge line is formed along the corner. Moreover, you may use a terminal with a circular cross section without a ridgeline as needed as a terminal of this indication.
- dam walls 27 attached to the terminals 35 adjacent to each other are separated from each other.
- the dam wall bodies adjacent to each other may be integrally formed as long as the retention of fuel in the vicinity of the second seal film can be reduced.
- the three dam wall bodies 27 in the first embodiment may be integrally formed as one dam wall body.
- the main film portion 41a and the auxiliary film portion 41b in the first seal film 40 are continuously formed.
- the main membrane portion and the auxiliary membrane portion may be separated from each other.
- the seal film is easily peeled off. Therefore, it is desirable that the main film part and the auxiliary film part are formed continuously.
- the protruding portion 36 protruding from the first wall portion 25 is formed by embedding the terminal 35 in the inner case 21 in the inner case molding step.
- the protrusion may be formed by assembling a terminal to the case after the inner case is molded.
- the seal films 40 and 45 are made of hydrin rubber.
- the material of the sealing film is not limited to hydrin rubber. Rubber materials other than hydrin rubber (elastomer), epoxy resin, and the like can be used as the material for the seal film.
- the process of forming the seal film is not limited to the baking process of the above embodiment.
- fine irregularities 49a are formed on the outer case contact surfaces 42 and 46 by precipitating bubbles in the primer 49 on the outer surface.
- Such unevenness 49a may be a crater-like dent or may be a spinous process.
- the method of forming irregularities on the outer case contact surface is not limited to the above method.
- the dam wall 27 of the inner case 21 is provided in the terminal 35.
- the terminal may be formed with a convex portion protruding in the thickness direction TD or a concave portion recessed in the thickness direction TD at a position corresponding to the weir wall body 27.
- the PPS resin has been described as an example of the material of the housing 20.
- the material of the housing 20 is not limited to PPS resin, and may be other resin materials.
- the connection between the terminal 35 and the lead wire 72 may not be by welding.
- a Hall IC is used as a sensor (detection element).
- another non-contact sensor (detection element) such as a magnetoresistive sensor may be used as the sensor (detection element).
- the present disclosure has been described based on an example in which the present disclosure is applied to the vehicle liquid level detection device 100 that detects the remaining fuel amount.
- the scope of application of the present disclosure need not be limited to such a liquid level detection device, but may be a liquid level detection device in a container of other liquids mounted on the vehicle, such as brake fluid, engine cooling water, and engine oil. May be.
- the present disclosure is applicable not only to vehicles but also to liquid level detection devices provided in liquid containers provided in various consumer devices and various transport machines.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Level Indicators Using A Float (AREA)
- Connector Housings Or Holding Contact Members (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
Description
さて、特許文献1のコネクタにおけるシール構造は、シール剤充填用凹部に多量のシール剤を充填することによって形成される。故に、こうした多量のシール剤を充填する工程を含むことに起因して、コネクタの製造工程が、複雑化する。仮に、シール剤充填用凹部に充填するシール剤の量を低減させてしまうと、第1の成形体内に液体の浸入を防ぐシール剤の機能の信頼性が、確保されなくなる可能性がある。
さらに、本開示では、液面検出装置の製造方法を提供する。本開示の液面検出装置の製造方法では、壁部と、所定の突出方向に前記壁部を貫通して突出する突出部を有するターミナルとを含むサブアッセンブリを形成する。次いで、溶媒に溶けて液体状態となったシール材を前記壁部および前記突出部に塗布する。さらに、前記シール材を固化することで、前記突出部の外周面の対応する部位を被覆し、かつ、前記外周面の前記対応する部位と前記壁部との間を接続し、前記外周面の前記対応する部位における膜厚が、前記壁部に近接するに従って増加するシール膜を形成する。そして、前記壁部と、前記ターミナルの前記外周面の前記対応する部位を被覆する前記シール膜とを被覆する被覆部を樹脂材料で成形する。
本開示の第一実施形態による液面検出装置100は、図1に示すように、液体としての燃料を貯留する燃料タンク(容器)90内にて、燃料に浸る位置に設置されている。液面検出装置100は、燃料ポンプモジュール93に保持された状態にて、燃料タンク90に貯留されている燃料の液面91の高さを検出する。液面検出装置100は、ハウジング20、フロート60、マグネットホルダ50、及びホールIC70を備える。
図9に示される本開示の第二実施形態は、第一実施形態の変形例である。第二実施形態のハウジング(固定体)220では、第一実施形態の堰壁体27(図2参照)と、第二シール膜45(図2参照)とが、省略されている。第二実施形態のシール膜(第一シール膜)240は、第一実施形態の主膜部分41a(図2参照)と同様に、インナーケース221のうちのインナーケース本体222の第一壁部25から突出部36に沿って突出方向PDに延びている。シール膜240は、第一壁部25に近接するに従って稜線39上における膜厚を次第に増加させる形状であって、第一壁部25及び突出部36の間に生じる隙間を覆っている。
図10に示される本開示の第三実施形態は、第一実施形態の別の変形例である。第三実施形態による液面検出装置からは、第一実施形態の第一シール膜40(図3参照)が省略されている。故に、シール膜(第二シール膜)340は、第一実施形態の第二シール膜45(図3参照)と実質的に同一である。
以上、本開示による複数の実施形態について説明したが、本開示は、上記実施形態に限定して解釈されるものではなく、本開示の要旨を逸脱しない範囲内において種々の実施形態及び組み合わせに適用することができる。
なお、第一実施形態における第二壁部28の壁面28bおよび第三壁部29の壁面29bについても、ターミナル35に対して鋭角または鈍角をなすように変更してもよい。さらに、第二実施形態の第一壁部25の壁面25bおよび第三実施形態の第二壁部28の壁面28bについても、同様に、ターミナル35に対して鋭角または鈍角をなすように変更してもよい。
上記実施形態では、センサ(検出素子)として、ホールICを使用した。しかし、センサ(検出素子)として、磁気抵抗センサなどの他の非接触式センサ(検出素子)を用いてもよい。
Claims (16)
- 液体の液面(91)の高さを検出する液面検出装置であって、
壁部(25,28,29)と、
所定の突出方向(PD)に前記壁部(25,28,29)を貫通して突出する突出部(36)を有するターミナル(35)と、
前記壁部(25,28,29)及び前記突出部(36)を被覆する被覆部(33)と、
前記被覆部(33)内において、前記突出部(36)の外周面(36c)の対応する部位を被覆し、かつ、前記外周面(36c)の前記対応する部位と前記壁部(25,28,29)との間を接続し、前記外周面(36c)の前記対応する部位における膜厚が、前記壁部(25,28,29)に近接するに従って増加するシール膜(40,45,240,340,440)と
を備える液面検出装置。 - 前記壁部(25,28,29)は、前記突出部(36)に接触し、かつ、周方向において前記突出部(36)の全周にわたって継ぎ目無く延設されており、
前記被覆部(33)は、前記シール膜(40,45,240,340,440)に接触し、かつ、周方向において前記シール膜(40,45,240,340,440)の全周にわたって継ぎ目無く延設されており、
前記シール膜(40,45,240,340,440)の一部が、前記所定の突出方向(PD)において前記壁部(25,28,29)と、前記被覆部(33)との間に保持されている請求項1に記載の液面検出装置。 - 前記壁部(25,28,29)の材料は、前記被覆部(33)の材料と同一である請求項1または2に記載の液面検出装置。
- 前記壁部(25,28,29)は、樹脂材料で樹脂成形されており、
前記ターミナル(35)は、導電性を有する金属材料からなり、前記壁部(25,28,29)内にインサート成形されている請求項1乃至3のいずれか一項に記載の液面検出装置。 - 前記所定の突出方向(PD)と直交する方向における前記突出部(36)の横断面は、多角形状である請求項1乃至4のいずれか一項に記載の液面検出装置。
- 前記シール膜(40,45,240,340,440)は、前記被覆部(33)に接する接触表面(42,46)に、凹凸(49a)を有する請求項1乃至5のいずれか一項に記載の液面検出装置。
- 前記突出部(36)は、前記ターミナル(35)の基端部(37)から前記所定の突出方向(PD)に突出し、
前記壁部(28,29)を有し、前記所定の突出方向(PD)に直交する方向に前記突出部(36)から突出する凸体部分(27)と、
前記凸体部分(27)から離間するとともに、前記基端部(37)を収容するインナーケース本体(22)と
をさらに備える請求項1乃至6のいずれか一項に記載の液面検出装置。 - 前記突出部(36)は、前記ターミナル(35)の基端部(37)から前記所定の突出方向(PD)に突出し、
前記壁部(25)を有し、前記基端部(37)を収容するインナーケース本体(22)をさらに備える請求項1乃至6のいずれか一項に記載の液面検出装置。 - 前記シール膜(40,440)は第一シール膜であり、
前記所定の突出方向(PD)に前記壁部(25)から離間して位置し、前記所定の突出方向(PD)に直交する方向に前記突出部(36)から突出する凸体部分(27)と、
前記被覆部(33)内において、前記所定の突出方向(PD)における前記凸体部分(27)の反インナーケース本体(22)側で、前記突出部(36)の前記外周面(36c)の別の対応する部位を被覆し、かつ、前記外周面(36c)の前記別の対応する部位と前記凸体部分(27)の壁面(28b)との間を接続し、前記外周面(36c)の前記別の対応する部位における膜厚が、前記凸体部分(27)の前記壁面(28b)に近接するに従って増加する第二シール膜(45)と
をさらに備える請求項8に記載の液面検出装置。 - 前記第一シール膜(40,440)は、前記突出部(36)の前記外周面(36c)に沿って前記壁部(25)から前記凸体部分(27)まで前記所定の突出方向(PD)に連続して延びており、
前記第一シール膜(40,440)の前記膜厚が、前記突出部(36)の前記外周面(36c)に沿って前記凸体部分(27)に近接するに従って増加する請求項9に記載の液面検出装置。 - 前記ターミナル(35)は、複数のターミナル(35)のうちの1つであり、
前記凸体部分(27)は、前記複数のターミナル(35)にそれぞれ設けられた複数の凸体部分(27)のうちの1つであり、
前記複数の凸体部分(27)のうちの互いに隣接する各二つの凸体部分(27)は、互いに離間している請求項7、9および10のいずれか一項に記載の液面検出装置。 - 前記被覆部(33)内において、前記ターミナル(35)に電気的に接続されたセンサ(70)をさらに備える請求項1乃至11のいずれか一項に記載の液面検出装置。
- 前記センサ(70)を内部に保持する前記被覆部(33)を含む固定体(20,220)と、
前記固定体(20,220)に回転自在に支持され、前記液面(91)の前記高さの変化に応じて前記固定体(20,220)に対して回転する回転体(50)と
をさらに備え、
前記センサ(70)は、前記固定体(20,220)に対する前記回転体(50)の回転角度を検出する請求項12に記載の液面検出装置。 - 前記固定体(20,220)は、車両の燃料タンク(90)内に収容された燃料ポンプモジュール(93)に取り付けられるよう構成されている請求項13に記載の液面検出装置。
- 壁部(25,28,29)と、所定の突出方向(PD)に前記壁部(25,28,29)を貫通して突出する突出部(36)を有するターミナル(35)とを含むサブアッセンブリ(200)を形成することと、
溶媒に溶けて液体状態となったシール材を前記壁部(25,28,29)および前記突出部(36)に塗布することと、
前記シール材を固化することで、前記突出部(36)の外周面(36c)の対応する部位を被覆し、かつ、前記外周面(36c)の前記対応する部位と前記壁部(25,28,29)との間を接続し、前記外周面(36c)の前記対応する部位における膜厚が、前記壁部(25,28,29)に近接するに従って増加するシール膜(40,45,240,340,440)を形成することと、
前記壁部(25,28,29)と、前記ターミナル(35)の前記外周面(36c)の前記対応する部位を被覆する前記シール膜(40,45,240,340,440)とを被覆する被覆部(33)を樹脂材料で成形すること
を含む液面検出装置の製造方法。 - 前記サブアッセンブリ(200)を形成することは、前記壁部(25,28,29)を導電性金属材料からなる前記ターミナル(35)上に樹脂材料で樹脂成形することによって、前記ターミナル(35)を前記壁部(25,28,29)にインサート成形することを含む請求項15に記載の液面検出装置の製造方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112015000893-3A BR112015000893B1 (pt) | 2012-08-20 | 2013-08-02 | Dispositivo de detecção de nível de líquido, e, método de fabricação de um dispositivo de detecção de nível de líquido |
US14/421,935 US9677925B2 (en) | 2012-08-20 | 2013-08-02 | Liquid level detection device and manufacturing method of liquid level detection device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012-181718 | 2012-08-20 | ||
JP2012181718A JP5660088B2 (ja) | 2012-08-20 | 2012-08-20 | 液面検出装置、及び液面検出装置の製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014030308A1 true WO2014030308A1 (ja) | 2014-02-27 |
Family
ID=50149639
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/004702 WO2014030308A1 (ja) | 2012-08-20 | 2013-08-02 | 液面検出装置、及び液面検出装置の製造方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US9677925B2 (ja) |
JP (1) | JP5660088B2 (ja) |
BR (1) | BR112015000893B1 (ja) |
WO (1) | WO2014030308A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6123578B2 (ja) * | 2013-08-27 | 2017-05-10 | 株式会社デンソー | 液面検出装置の製造方法 |
JP6308012B2 (ja) | 2014-05-16 | 2018-04-11 | 株式会社デンソー | 高圧ポンプの制御装置 |
BR102016030722B1 (pt) * | 2016-12-28 | 2021-07-20 | Robert Bosch Limitada | Dispositivo de mensuração de nível de fluido liquido em ambiente confinado |
US10634102B2 (en) * | 2018-09-06 | 2020-04-28 | Trico Group, LLC | Fuel pump assembly |
EP3942260A1 (de) * | 2019-03-20 | 2022-01-26 | Vitesco Technologies GmbH | Winkelerfassungseinrichtung |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4089522B2 (ja) * | 2003-06-19 | 2008-05-28 | 株式会社デンソー | 液面検出装置 |
JP4138527B2 (ja) * | 2003-02-20 | 2008-08-27 | 矢崎総業株式会社 | 非接触式液面レベルセンサの製造方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH023163U (ja) * | 1988-06-20 | 1990-01-10 | ||
JPH081392B2 (ja) | 1991-04-25 | 1996-01-10 | 日本電装株式会社 | 車両用センダのフランジ部構造およびその製造方法 |
JP3365138B2 (ja) * | 1995-03-09 | 2003-01-08 | 住友電装株式会社 | コネクタおよびその製造方法 |
JP3843553B2 (ja) | 1996-11-21 | 2006-11-08 | 株式会社デンソー | コネクタ装置 |
JP3724747B2 (ja) * | 2003-02-20 | 2005-12-07 | 矢崎総業株式会社 | 非接触式液面レベルセンサ |
JP2004347519A (ja) * | 2003-05-23 | 2004-12-09 | Hitachi Unisia Automotive Ltd | 燃料ゲージ |
US7377163B2 (en) | 2003-06-19 | 2008-05-27 | Denso Corporation | Liquid level detector |
JP4125262B2 (ja) * | 2004-05-07 | 2008-07-30 | 矢崎総業株式会社 | 非接触式液面レベルセンサ |
CN101683757A (zh) * | 2008-09-25 | 2010-03-31 | 比亚迪股份有限公司 | 一种成型方法及其产品 |
JP5209038B2 (ja) * | 2010-12-08 | 2013-06-12 | 日立オートモティブシステムズ株式会社 | コネクタ及びその製造方法 |
-
2012
- 2012-08-20 JP JP2012181718A patent/JP5660088B2/ja not_active Expired - Fee Related
-
2013
- 2013-08-02 US US14/421,935 patent/US9677925B2/en active Active
- 2013-08-02 BR BR112015000893-3A patent/BR112015000893B1/pt not_active IP Right Cessation
- 2013-08-02 WO PCT/JP2013/004702 patent/WO2014030308A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4138527B2 (ja) * | 2003-02-20 | 2008-08-27 | 矢崎総業株式会社 | 非接触式液面レベルセンサの製造方法 |
JP4089522B2 (ja) * | 2003-06-19 | 2008-05-28 | 株式会社デンソー | 液面検出装置 |
Also Published As
Publication number | Publication date |
---|---|
US9677925B2 (en) | 2017-06-13 |
JP5660088B2 (ja) | 2015-01-28 |
BR112015000893A2 (pt) | 2017-06-27 |
JP2014038067A (ja) | 2014-02-27 |
US20150192453A1 (en) | 2015-07-09 |
BR112015000893B1 (pt) | 2020-09-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2014030308A1 (ja) | 液面検出装置、及び液面検出装置の製造方法 | |
JP6507887B2 (ja) | 駆動装置 | |
EP1600780B1 (en) | Rotational sensor | |
CN106300755B (zh) | 电动机以及电动机的制造方法 | |
US20120306484A1 (en) | Magnetic detection apparatus | |
JP5344375B2 (ja) | 回転角度検出装置 | |
EP2317166B1 (en) | Sensor mounting cover for a rolling-contact bearing | |
JP5494091B2 (ja) | 液面検出装置の製造方法 | |
CN102841214B (zh) | 具有o形环的传感器设备 | |
JP5682655B2 (ja) | 液面検出器 | |
WO2015029343A1 (ja) | 液面検出装置の製造方法、および液面検出装置 | |
JP4626318B2 (ja) | 回転検出センサ | |
CN105526956B (zh) | 传感器布置以及用于制造传感器布置的方法 | |
JP4743022B2 (ja) | コイル装置 | |
JP2013113785A (ja) | 回転角度検出装置 | |
CN111193359B (zh) | 转子和马达 | |
JP6477067B2 (ja) | 液面検出装置 | |
KR101864433B1 (ko) | 회전체 검출 센서 구조물 | |
JP6642133B2 (ja) | モータの製造方法 | |
JP5494084B2 (ja) | 液面検出装置の製造方法 | |
JP6969355B2 (ja) | 回転角度検出装置 | |
JP2014142207A (ja) | 液面検出器 | |
JP2005292075A (ja) | 検出センサ | |
JP2017150912A (ja) | 液面検出装置 | |
JP2014096323A (ja) | ターミナル製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13830815 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14421935 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112015000893 Country of ref document: BR |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 13830815 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 112015000893 Country of ref document: BR Kind code of ref document: A2 Effective date: 20150114 |