Measurement device

Abstract

The present invention has good assemblability and enables reliable conduction between a substrate and a metal member. A cylindrical holder formed from an insulator; a plate-shaped substrate; and a conductive part for electrically connecting the substrate and the housing. The housing has a first blind hole that is open at one end. The holder is provided so as to be rotatable inside the first blind hole and so as to be movable along an axis of the first blind hole. The substrate is fixed to the holder so as to be adjacent to one end of the holder, and is provided inside the first blind hole. The conduction part has a conduction member made of a metal plate-shaped member. The conduction member has an elastically deformable plate spring portion, and the conduction member is in line contact or point contact with the first blind hole.

Description

Technical Field

[0001] The present invention relates to an assay device. Background Art

[0002] Patent document 1 discloses a pressure sensor, which, when assembled, clamps a coil spring while bringing the pressure sensor unit relatively close to and in contact with a relay substrate, so that under the action of the elastic force generated by the coil spring, the two ends of the coil spring are pressed and conducted relative to a metal base and the relay substrate, thereby maintaining the grounding piece of the wiring layer of the relay substrate and the base at the same potential, and also maintaining the base and the grounding plate of the pressure detection element at the same potential.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2021-060240 Summary of the invention

[0006] Problems to be solved by the invention

[0007] However, in the invention described in Patent Document 1, since a coil spring having a diameter smaller than the blind hole diameter of the cover or the diameter of the base is used, the coil spring may move or deform during assembly and become unstable, which may cause a problem during assembly.

[0008] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a measuring device that has good assemblability and can reliably establish electrical conduction between a substrate and a metal member.

[0009] Solutions to Solve Problems

[0010] In order to solve the above-mentioned problems, the measuring device of the present invention is characterized in that, for example, it comprises: a housing, which is made of metal and has a columnar shape, and has a first blind hole opened at one end; a holder, which is formed of an insulator and has a cylindrical shape, and is arranged inside the first blind hole so as to be rotatable and movable along the axis of the first blind hole; a plate-like substrate, which is fixed to the holder and is arranged inside the first blind hole; and a conductive part, which electrically connects the substrate and the housing, and has a conductive part using a metal plate-like member, the conductive part has a leaf spring part that can be elastically deformed, and the conductive part is in line contact or point contact with the first blind hole.

[0011] According to the measuring device of the present invention, the conducting part electrically connecting the substrate and the housing has a conducting member using a metal plate-shaped member, and the conducting member is in line contact or point contact with the inner circumference of the first blind hole. Therefore, the rotation and movement of the holder are not blocked during assembly, and the assembly performance is good.

[0012] Alternatively, a conductive wire may be provided, one end of which is provided on the substrate, and the other end of which is provided on the conductive member, and the conductive wire connects the substrate and the conductive member, and the conductive member is formed by the plate-like member in an arc shape, and has a main body and a leaf spring portion, the main body being provided along the outer peripheral surface of the retainer or the substrate, the leaf spring portion being formed by bending in a manner protruding toward the inner peripheral surface of the first blind hole, the front end of the leaf spring portion being in an arc shape and abutting against the inner peripheral surface of the first blind hole. That is, the conductive member is in linear contact with the first blind hole. Thus, the abutting portion is pressed against the inner peripheral surface under the action of the leaf spring portion, so that the conductive member (i.e., the substrate) and the housing can be reliably conductively connected. In addition, the substrate, the retainer, and the conductive member are pre-assembled to form a retainer assembly, and the retainer assembly is assembled to the housing, so that the assembly is good. Furthermore, since the substrate and the conducting member are connected by a wire and the substrate does not come into contact with the inner peripheral surface, no force is applied to the substrate during rotation of the holder assembly, thereby preventing damage to the substrate.

[0013] Alternatively, a conductive wire may be provided, one end of which is provided on the substrate, and the other end of which is provided on the conductive member, and the conductive wire connects the substrate and the conductive member, the conductive member is formed by the plate-shaped member in an arc shape, and has a main body and a leaf spring, the main body is provided along the outer peripheral surface of the retainer or the substrate, the leaf spring is formed by bending in a manner protruding toward the inner peripheral surface of the first blind hole, and a protrusion is formed at the front end of the leaf spring, and the protrusion abuts against the inner peripheral surface of the first blind hole. Thus, the protrusion is pressed against the inner peripheral surface under the action of the leaf spring, so that the conductive member (i.e., the substrate) and the housing can be reliably conductive. In particular, the conductive member is in point contact with the first blind hole under the action of the protrusion, so the pressing force becomes higher than in the case of line contact, and the conduction becomes more reliable. In addition, the substrate, the holder, and the conductive portion are pre-assembled to form a holder assembly, and the holder assembly is assembled to the housing, so that the assembly is good and no force is applied to the substrate when the holder assembly is rotated, which can prevent the substrate from being damaged, etc. In addition, the protrusion is in point contact with the inner peripheral surface, so it is easier to rotate the holder assembly than in the case of line contact.

[0014] Alternatively, the conductive member may include two leaf spring portions, and the leaf spring portions are arranged at positions overlapping with a line passing through the center axis of the first blind hole when viewed along the center axis of the first blind hole. Thus, the inner circumferential surface clamps the two leaf spring portions, so that the two leaf spring portions are deformed equally, thereby enabling reliable conduction between the conductive member and the housing. In addition, the retaining member will not be eccentric relative to the first blind hole, and assembly is easy.

[0015] Alternatively, one end of the conductive member is bent and disposed at a fixed end of the groove of the retainer, and the other end of the conductive member is an open end not disposed at the retainer. A plurality of leaf spring portions can be disposed on one conductive member, making assembly easy. In addition, the leaf spring portion expands by elastic deformation, so that even if the main body portion is deformed, no malfunction occurs in the conductive member.

[0016] Alternatively, both ends of the conductive member may be bent and fixed to the groove of the holder. Thus, the assembly of the holder assembly in which the substrate, the holder, and the conductive portion are integrated is improved. For example, if one end is an open end, the open end may be hooked on the inner circumferential surface depending on the rotation direction, but if both ends are fixed to the groove of the holder, such a problem will not occur.

[0017] Alternatively, the conductive member may include a contact portion formed by bending the plate-like member into an arc shape, and the contact portion contacts the inner peripheral surface of the first blind hole. Thus, rotation and movement of the holder are not blocked during assembly, and assembly performance is improved.

[0018] Effects of the Invention

[0019] According to the present invention, the assemblability is good, and the substrate can be reliably connected to the metal member. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 1 is a diagram schematically showing a filtration device 100 in which the measuring device 1 is provided.

[0021] Figure 2 It is a perspective view showing the outline of the measuring device 1 .

[0022] Figure 3 It is a cross-sectional view schematically showing the measuring device 1 .

[0023] Figure 4 It is a perspective view schematically showing the holder 30 and the conductive portion 40 .

[0024] Figure 5 yes Figure 3 AA section view.

[0025] Figure 6 It is an exploded perspective view of the measuring device 1.

[0026] Figure 7 It is a cross-sectional perspective view showing the outline of the measuring device 2.

[0027] Figure 8 It is a cross-sectional view schematically showing the measuring device 2.

[0028] Fig. 9It is a cross-sectional view schematically showing the measuring device 3 .

[0029] Fig.10 It is a perspective view schematically showing the holder 30A and the conductive portion 40B.

[0030] Fig.11 It is a cross-sectional view schematically showing the measuring device 3 .

[0031] Fig.12 It is a cross-sectional view schematically showing the measuring device 4 .

[0032] Fig.13 yes Fig.12 BB cross-sectional view.

[0033] Fig.14 It is a cross-sectional view schematically showing the measuring device 5 .

[0034] Fig.15 yes Fig.14 CC cross-sectional view.

[0035] Fig.16 It is a cross-sectional perspective view showing the outline of the measuring device 6 .

[0036] Fig.17 It is a plan view of the measuring device 6 viewed along the central axis ax.

[0037] Fig.18 It is a cross-sectional perspective view showing the outline of the measuring device 7.

[0038] Fig.19 It is a top view of the measuring device 7.

[0039] Fig. 20 It is a cross-sectional perspective view schematically showing the measuring device 8 .

[0040] Fig.21 It is a cross-sectional view schematically showing the measuring device 8 .

[0041] Fig. 22 It is a perspective view showing the outline of the measuring device 9.

[0042] Fig.23 It is a cross-sectional view showing the outline of the measuring device 9.

[0043] Fig.24 It is a perspective view schematically showing the conductive member 41E.

[0044] Fig.25 It is a cross-sectional view schematically showing the measuring device 9A.

[0045] Fig.26 It is a cross-sectional view schematically showing the measuring device 15 .

[0046] Fig. 27 It is a cross-sectional view schematically showing the measuring device 16 .

[0047] Fig.28 It is a cross-sectional view schematically showing the measuring device 17 .

[0048] Fig.29 It is a cross-sectional view schematically showing the measuring device 17A. DETAILED DESCRIPTION

[0049] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The measuring device of the present invention is provided in a filter device, a valve, etc. provided in a fuel tank or a urea water SCR system.

[0050] <First embodiment>

[0051] Figure 1 1 is a diagram showing an overview of a filter device 100 provided with a measuring device 1 according to a first embodiment of the present invention. The filter device 100 removes dust and the like contained in liquids such as oil, fuel, and urea water. In this embodiment, a fuel filter that removes dust and the like contained in fuel is used as an example of a filter device, but the filter device is not limited to a fuel filter and can be used, for example, as a reflux filter. It should be noted that in Figure 1 In the figure, a portion of the hatching indicating the cross section is omitted.

[0052] The filter device 100 mainly includes a housing 110 , a filter element 120 and a head 130 .

[0053] The housing 110 is a substantially bottomed cylindrical member with one end substantially closed and the other end open. A drain portion 111 is provided at the lower end of the housing 110. It should be noted that the drain portion 111 is not essential.

[0054] The opening of the housing 110 is attached to the head 130 . When the housing 110 is attached to the head 130 , the filter element 120 is attached to a central tube 132 (described in detail later) of the head 130 . Thus, the filter element 120 is accommodated inside the housing 110 .

[0055] The filter element 120 mainly includes an inner cylinder 126, a filter medium 127, and plates 128 and 129 provided at both ends of the filter medium 127. The inner cylinder 126 is a substantially hollow cylindrical member having openings at both ends, and is formed using a highly corrosion-resistant material (eg, resin, metal).

[0056] The filter medium 127 is a generally hollow cylindrical shape having a thickness in the radial direction. The filter medium 127 is formed by pleating a sheet of filter paper made of synthetic resin, paper, or the like, and connecting both ends of the pleated filter paper and rounding them.

[0057] At one end of the filter material 127 ( Figure 1 The upper end of the plate 128 is provided, and the other end ( Figure 1 A plate 129 is provided at the lower end of the plate 128. The plate 128 and the plate 129 are formed using a material having high corrosion resistance.

[0058] The plate 128 is provided at the upper end of the filter material 127. The central cylinder 132 of the head 130 is inserted into the plate 128. A sealing member 113 (e.g., an O-ring) is provided between the plate 128 and the central cylinder 132. The sealing member 113 is used to seal the plate 128 so that the liquid does not leak to the outside from between the plate 128 and the central cylinder 132. In addition, the inner cylinder 126 is provided in the plate 128, so that when the plate 128 is inserted into the central cylinder 132, the internal space of the inner cylinder 126 is communicated with the internal space of the central cylinder 132.

[0059] The head 130 mainly includes a main body 131 , a central tube 132 , an inflow path 133 , an outflow path 134 , and a mounting blind hole 135 .

[0060] The main body 131 is formed of a material with high corrosion resistance. The main body 131 has a cylindrical portion that is substantially in the shape of a bottomed cylinder, and an external thread portion 131a is formed on the outer peripheral surface near the opening end of the cylindrical portion. When the external thread portion 131a is screwed into the internal thread portion 110a formed on the inner periphery of the housing 110, the housing 110 is mounted on the head 130.

[0061] A sealing member 112 (for example, an O-ring) is provided between the housing 110 and the head 130. The sealing member 112 seals the space between the housing 110 and the head 130 so that liquid does not leak to the outside.

[0062] The central tube 132 is substantially cylindrical and is formed integrally with the main body 131. The central tube 132 protrudes from the substantially center of the bottom surface of the main body 131 in the same direction as the side surface of the main body 131. The central tube 132 has a concave portion 132a formed on its outer peripheral surface into which the hollow portion 123a of the plate 128 is inserted.

[0063] The inflow passage 133 and the outflow passage 134 are substantially tubular. The space S1 formed by the side surface of the body 131 and the central tube 132 (the space outside the central tube 132 ) communicates with the inflow passage 133 . The space S2 inside the central tube 132 communicates with the outflow passage 134 .

[0064] The liquid L1 to be filtered is supplied to the filter device 100 via the inflow path 133. The liquid L1 (see Figure 1 The filtered liquid L2 (see solid arrow) flows into the housing 110, is filtered by the filter material 127, and flows out into the inner cylinder 126. Figure 1 The liquid is discharged from the outflow passage 134 to the outside of the filter device 100 (as indicated by the double-dashed line arrow).

[0065] The mounting blind hole 135 is formed near the bottom surface of the main body 131. The measuring device 1 is installed in the mounting blind hole 135. Sealing members (for example, O-rings) 71 and 72 are provided between the mounting blind hole 135 and the measuring device 1. The sealing members 71 and 72 seal the space between the mounting blind hole 135 and the measuring device 1 so that liquid does not leak to the outside.

[0066] The bottom of the blind mounting hole 135 is connected to the outflow path 134, that is, the space S2. Since the bottom of the measuring device 1 is open, the space S2 is connected to the space 12b (described in detail later) inside the measuring device 1. In addition, the space S1 is connected to the space 12a (described in detail later) inside the measuring device 1 via the through hole 136.

[0067] Next, the measuring device 1 will be described in detail. Figure 2 1 is a perspective view showing an overview of the measuring device 1. Figure 2 In the figure, a part of the cross section is shown. Figure 3 2 is a cross-sectional view showing an overview of the measuring device 1. Figure 3 A portion of the hatching indicating the cross section is omitted.

[0068] The measuring device 1 mainly includes a housing 10 , a substrate 20 , a holder 30 , a conductive portion 40 , a moving member 50 , an elastic member 61 , and lead wires 81 , 82 , and 83 .

[0069] The shell 10 is columnar and has blind holes 11 and 12. In the present embodiment, the shell 10 is cylindrical, but the shape of the shell 10 is not limited thereto. The shell 10 is preferably made of metal and is made of non-magnetic material. Here, non-magnetic material refers to a material that is not a ferromagnetic material (including paramagnetic and diamagnetic materials), such as aluminum, brass, and a part of austenitic stainless steel (SUS304, etc.). In the present embodiment, aluminum is used in the shell 10, and an aluminum oxide film treatment (anodized treatment) is applied to the surface. It should be noted that the anodized film is removed from the inner peripheral surface 11a of the blind hole 11.

[0070] The blind hole 11 (equivalent to the first blind hole of the present invention) opens at one end 13 of the housing 10, and the blind hole 12 opens at the other end 14 of the housing 10. The blind hole 11 mainly includes a substrate 20, a retainer 30, and a conductive portion 40. An internal thread 11b is formed on an inner peripheral surface 11a of the blind hole 11. The blind hole 12 mainly includes a moving member 50 and an elastic member 61.

[0071] The housing 10 has a blind hole 135 (see Figure 1 ) and a non-insertion portion 10b provided outside the mounting blind hole 135. Sealing members 71 and 72 are provided on the outer peripheral surface of the insertion portion 10a.

[0072] The substrate 20 is plate-shaped and is disposed inside the blind hole 11. One ends of a plurality of wires 81, 82, and 83 are connected to the substrate 20. It should be noted that the number of wires disposed on the substrate 20 is not limited thereto, and at least one wire may be disposed on the substrate 20.

[0073] In addition, a magnetic field detection element (not shown) for detecting changes in a magnetic field formed by a magnet 52 (described in detail later) is provided on the substrate 20. A reed switch, a Hall element, etc. can be used as the magnetic field detection element. The detection result of the magnetic field detection element is output to the outside of the measuring device 1 via a signal line (any one of the conductors 81, 82, and 83).

[0074] The holder 30 is cylindrical and is formed of an insulator (e.g., resin). The substrate 20 is fixed to the holder 30. It should be noted that in the present embodiment, the substrate 20 is disposed adjacent to one end of the holder 30 (here, the bottom surface 11c side of the blind hole 11), but the position of the substrate 20 is not limited thereto.

[0075] The holder 30 can rotate inside the blind hole 11 and can move along the central axis ax of the blind hole 11. An external thread 30a is formed on the outer peripheral surface of the holder 30. By changing the meshing length of the external thread 30a and the internal thread 11b, the substrate 20 and the holder 30 rotate inside the blind hole 11 and the position along the direction of the central axis ax is changed. Thus, the position along the direction of the central axis ax of the magnetic field detection element (the central axis ax direction) can be adjusted.

[0076] However, the method of providing the holder 30 to be rotatable and movable along the central axis ax in the blind hole 11 is not limited thereto. For example, a pin may be provided in the holder 30 and the pin may be moved along a spiral groove formed on the inner peripheral surface 11a, thereby allowing the holder 30 to rotate and move along the central axis ax in the blind hole 11.

[0077] The conductive part 40 electrically connects the substrate 20 and the housing 10. The conductive part 40 mainly includes a conductive member 41 and a ground wire 45. The conductive member 41 is a metal plate-shaped member. The ground wire 45 is a conductive wire that connects the substrate 20 and the conductive member 41. One end of the ground wire 45 is provided on the ground pattern of the substrate 20, and the other end of the ground wire 45 is provided on the conductive member 41.

[0078] Figure 430 is a perspective view schematically showing the holder 30 and the conductive portion 40. The holder 30 has a groove 30b along the outer peripheral surface. The conductive member 41 is provided in the groove 30b and is positioned by the flange 30c.

[0079] The conducting member 41 mainly includes a main body 41a, a leaf spring 41b, an open end 41d, and a fixed end 41e. One end of the conducting member 41 is the open end 41d, and the other end of the conducting member 41 is the fixed end 41e. The fixed end 41e is bent relative to the main body 41a, and is set in the groove 30d provided in the holder 30 by pressing or the like. Thus, the conducting member 41 is fixed to the holder 30, and the conducting member 41 is set inside the blind hole 11 together with the holder 30. The open end 41d is not provided in the holder 30, and can move freely.

[0080] It should be noted that, in this embodiment, the ground wire 45 is provided at the open end 41d, but the position of installing the ground wire 45 is not limited thereto. For example, the ground wire 45 may also be provided at the fixed end 41e. In addition, a conductor other than the ground wire 45 may also be used to connect the substrate 20 and the conductive member 41.

[0081] Figure 5 yes Figure 3 AA cross-sectional view of FIG. The main body 41a is formed by bending a plate-like member into an arc shape. The main body 41a is provided along the outer peripheral surface of the holder 30 (here, the groove 30b). The conductive member 41 (main body 41a) is provided in a range of more than half of the outer peripheral surface of the holder 30.

[0082] The main body 41a is provided with a leaf spring 41b that is bent and elastically deformable so as to protrude toward the inner peripheral surface 11a of the blind hole 11. In the present embodiment, the leaf spring 41b is triangular in shape, but the shape of the leaf spring 41b is not limited thereto and may be, for example, an arc shape.

[0083] The front end of the leaf spring portion 41b is a contact portion 41c that contacts the inner peripheral surface 11a. The contact portion 41c is formed into an arc shape by bending the plate-like member, and the contact portion 41c is in line contact with the blind hole 11 (inner peripheral surface 11a). That is, the conductive member 41 is provided inside the blind hole 11 in a manner that contacts the retainer 30 and the inner peripheral surface 11a.

[0084] When the contact portion 41c contacts the inner peripheral surface 11a, the leaf spring portion 41b deforms so that the height of the leaf spring portion 41b decreases. Therefore, the contact portion 41c is pressed against the inner peripheral surface 11a by the biasing force of the leaf spring portion 41b, and the conductive member 41 and the housing 10 are reliably conductive.

[0085] The leaf spring portion 41b is elastically deformed to expand and the main body portion 41a is deformed. Since the open end 41d can move freely, even if the main body portion 41a is deformed, no malfunction occurs in the conduction member 41.

[0086] return Figure 2 , 3 The movable member 50 mainly includes a slide valve 51 and a magnet 52. The magnet 52 is provided at an end of the slide valve 51 (the end on the bottom surface 12c side of the blind hole 12). One end of an elastic member 61 is provided at the movable member 50. The elastic member 61 is, for example, a compression coil spring, and the other end of the elastic member 61 is provided at a fixed member 62 provided at the blind hole 12.

[0087] The slide valve 51 has a cylindrical shape and is provided to be movable along the central axis ax inside the blind hole 12. The slide valve 51 divides the blind hole 12 into a space 12a and a space 12b.

[0088] In the absence of filter material 127 (ref. Figure 1 ) is clogged, etc., and the primary side (space S1, refer to Figure 1 ) is in a low pressure state, the slide valve 51 is pressed to the bottom surface 12c side by the force of the elastic member 61, and the magnet 52 is located at the position closest to the bottom surface 12c.

[0089] When the pressure of space S1 increases due to clogging of filter medium 127, moving member 50 moves away from bottom surface 12c, overcoming the force of elastic member 61. Magnetic field detection element detects the change of magnetic field caused by the movement of magnet 52 and transmits the detection result to external equipment via signal line.

[0090] Figure 6 1 is an exploded perspective view of the measuring device 1, and shows the assembled state of the measuring device 1. Figure 6 In the figure, a part of the cross section is shown, and the hatching lines showing the cross section are omitted. The substrate 20 (the wires 81, 82, 83 are provided on the substrate 20), the holder 30 and the conductive portion 40 are pre-assembled to form a holder assembly. The holder assembly is assembled to the housing 10 to form the measuring device 1.

[0091] During assembly, the engagement length of the external thread 30a and the internal thread 11b is adjusted to adjust the position of the magnetic field detection element provided in the holder assembly, i.e., the substrate 20, in the direction of the central axis ax. After the position of the magnetic field detection element is determined, the holder 30 is fixed to the housing 10 by bonding or the like.

[0092] When the retainer assembly is inserted into the blind hole 11, the contact portion 41c contacts the inner peripheral surface 11a. In addition, when the retainer assembly is rotated by screwing the external thread 30a and the internal thread 11b, the contact portion 41c slides on the inner peripheral surface 11a. The contact portion 41c is in an arc shape, and the contact portion 41c is in line contact with the inner peripheral surface 11a, so that the contact portion 41c does not hook on the inner peripheral surface 11a to block the rotation or movement of the retainer 30, or the conductive member 41 is offset relative to the retainer 30.

[0093] The measuring device 1 is used in a state where it is installed in the filter device 100. When the lead wires 81, 82, 83 are used, a high voltage may flow into the substrate 20 through the lead wires 81, 82, 83 due to static electricity or the like. Since the contact portion 41c contacts the inner peripheral surface 11a, even if a high voltage flows into the substrate 20, the ground pattern of the substrate 20 and the housing 10 can be connected through the conductive portion 40, and discharge can be carried out from the substrate 20 to the housing 10, thereby protecting the substrate 20.

[0094] According to the present embodiment, the front end of the leaf spring portion 41b, which is formed by bending so as to protrude toward the inner peripheral surface 11a of the blind hole 11, that is, the abutting portion 41c abuts against the inner peripheral surface 11a, so that the rotation and movement of the holder 30 are not blocked during assembly, and the assemblability is good. In addition, the substrate 20, the holder 30, and the conductive portion 40 are pre-assembled to form a holder assembly, and the holder assembly is assembled to the housing 10, so the assemblability is good.

[0095] Furthermore, according to the present embodiment, since the substrate 20 and the conductive member 41 are connected by the ground wire 45 , no force is applied to the substrate 20 during the rotation of the holder 30 , and damage to the substrate 20 can be prevented.

[0096] According to this embodiment, the contact portion 41c is pressed against the inner peripheral surface 11a by the biasing force of the leaf spring portion 41b, so that the conductive member 41 is reliably conductive to the housing 10. Thus, the substrate 20 can be reliably conductive to the metal housing 10.

[0097] It should be noted that, in the present embodiment, the measuring device 1 is a differential pressure detection device that detects the difference between the pressure inside the filter material 127 and the pressure outside the filter material 127, but the measuring device 1 is not limited to the differential pressure detection device. In addition, in the present embodiment, the measuring device 1 is a differential pressure detection device, and the magnet 52 is used in the differential pressure detection, so a non-magnetic material (here, aluminum) is used in the housing 10, but when the magnet 52 is not used, it is not necessary to use a non-magnetic material in the housing 10, and the housing 10 can be made of metal.

[0098] <Second embodiment>

[0099] The second embodiment of the present invention is an embodiment in which the conducting member has a plurality of leaf spring portions. Hereinafter, a measuring device 2 according to the second embodiment will be described. It should be noted that the same reference numerals are given to the same parts as those in the first embodiment, and description thereof will be omitted.

[0100] Figure 7 It is a cross-sectional perspective view showing the outline of the measuring device 2. Figure 8 It is a cross-sectional view schematically showing the measuring device 2. Figure 8 The measuring device 2 is cut using a plane orthogonal to the central axis ax. Figure 8 The measuring device 2 mainly includes a housing 10 , a substrate 20 , a holder 30 , a conductive portion 40A, a moving member 50 , an elastic member 61 , and conductive wires 81 , 82 , and 83 .

[0101] The conductive portion 40A electrically connects the substrate 20 and the housing 10. The conductive portion 40A mainly includes a conductive member 41A and a ground line 45. The conductive member 41A is a metal plate-shaped member. The conductive member 41A is provided in the groove 30b and is positioned by the flange 30c.

[0102] The conductive member 41A mainly includes a main body 41f, a leaf spring 41b, an open end 41d, and a fixed end 41e. The main body 41f is formed by bending a plate-like member into an arc shape, similarly to the main body 41a, and is provided along the outer peripheral surface of the holder 30 (here, the groove 30b). In addition, the main body 41f is provided over a range of more than half the outer peripheral surface of the holder 30. A plurality of leaf springs 41b, two in this case, are provided on the main body 41f. The leaf spring 41b is arranged at a position overlapping with a line L passing through the center axis ax when viewed along the center axis ax.

[0103] According to the present embodiment, a plurality of leaf spring portions 41b are provided, so that the conducting member 41A can be reliably conducted with the housing 10. In addition, the abutting portion 41c abuts against the inner peripheral surface 11a, so that the rotation and movement of the holder 30 are not blocked during assembly, and the assemblability is good. Moreover, the substrate 20, the holder 30, and the conducting portion 40A are pre-assembled to form a holder assembly, and the holder assembly is assembled to the housing 10, so the assemblability is good. In addition, a plurality of leaf spring portions 41b can be provided on one conducting member 41A, the number of components is reduced, and assembly is easy.

[0104] In addition, according to the present embodiment, the two leaf spring portions 41b are arranged at positions overlapping the line L, so that the center of the main body portion 41a is unlikely to deviate from the central axis ax. Therefore, when the external thread 30a of the retainer 30 is screwed into the internal thread 11b, the retainer 30 is not eccentric with respect to the blind hole 11, and assembly is easy.

[0105] Furthermore, according to the present embodiment, the two leaf spring portions 41b are arranged at positions overlapping the line L. Therefore, the inner peripheral surface 11a sandwiches the two leaf spring portions 41b, and the two leaf spring portions 41b are deformed equally, so that the conduction member 41A and the housing 10 can be reliably conducted.

[0106] In the present embodiment, the conductive member 41A has two leaf spring portions 41b, but the conductive member 41A may have three or more leaf spring portions 41b. For example, a conductive member having three leaf spring portions 41b provided at intervals of 60 degrees may be used.

[0107] <Third Embodiment>

[0108] The third embodiment of the present invention is a mode in which the conduction portion has a plurality of conduction members. Hereinafter, a measurement device 3 of the third embodiment will be described. It should be noted that the same reference numerals are given to the same parts as those of the first and second embodiments, and description thereof will be omitted.

[0109] Fig. 9 1 is a perspective view schematically showing the measuring device 3. The measuring device 3 mainly includes a housing 10, a substrate 20, a holder 30A, a conductive portion 40B, a moving member 50, an elastic member 61, and lead wires 81, 82, and 83 (not shown).

[0110] Fig.10 2 is a perspective view schematically showing the holder 30A and the conductive portion 40B. The substrate 20, the holder 30A, and the conductive portion 40B are assembled in advance as a holder assembly.

[0111] The conductive portion 40B electrically connects the substrate 20 and the housing 10. The conductive portion 40B mainly includes a plurality of (two in this case) conductive members 41B and a ground line 45. The conductive member 41B is a metal plate-shaped member and contacts the holder 30 and the inner peripheral surface 11a of the blind hole 11.

[0112] The holder 30A is cylindrical like the holder 30 and is formed of an insulator. The holder 30A has a groove 30b along the outer peripheral surface, and the conductive member 41B is provided in the groove 30b. The holder 30A has a flange 30c and a convex portion 30e for positioning the conductive member 41B. In addition, the holder 30A has the same number of grooves 30d as the conductive member 41B (here, two).

[0113] The conductive member 41B mainly includes a main body 41g, a leaf spring 41b, an open end 41d, and a fixed end 41e. One end of the conductive member 41B is the open end 41d, and the other end of the conductive member 41B is the fixed end 41e. The open end 41d is not provided on the retainer 30, and the fixed end 41e is provided in the groove 30d by press-fitting or the like.

[0114] Fig.11 It is a cross-sectional view schematically showing the measuring device 3 . Fig.11 The measuring device 3 is cut by a plane that is orthogonal to the central axis ax and passes through the conductive member 41B. The main body 41g is formed by bending a plate-like member into an arc shape. The main body 41g is provided along the outer peripheral surface of the holder 30 (here, the groove 30b). The main body 41g is less than half the length of the outer peripheral surface of the holder 30, and is about 1 / 4 in this case. A leaf spring portion 41b is provided on the main body 41g.

[0115] The leaf spring portions 41 b provided in the two conductive members 41B are arranged at positions overlapping with a line L passing through the central axis ax when viewed along the central axis ax.

[0116] According to this embodiment, the front end of the leaf spring portion 41b, i.e., the abutment portion 41c, abuts against the inner peripheral surface 11a, so that the rotation and movement of the holder 30A are not blocked during assembly, and the assemblability is good. In addition, the substrate 20, the holder 30A, and the conductive portion 40B are pre-assembled to form a holder assembly, and the holder assembly is assembled to the housing 10, so the assemblability is good.

[0117] According to this embodiment, the contact portion 41c is pressed against the inner peripheral surface 11a by the urging force of the leaf spring portion 41b, and a plurality of leaf spring portions 41b are provided, so that the conductive member 41B is reliably conductive to the housing 10. Thus, the substrate 20 can be reliably conductive to the metal housing 10.

[0118] Furthermore, according to the present embodiment, the two leaf spring portions 41 b are arranged at positions overlapping the line L. Therefore, when the external thread 30 a of the holder 30A is screwed into the internal thread 11 b , the holder 30A is not eccentric with respect to the blind hole 11 , and assembly is easy.

[0119] Furthermore, according to the present embodiment, the two leaf spring portions 41b are arranged at positions overlapping the line L. Therefore, the inner peripheral surface 11a sandwiches the two leaf spring portions 41b, and the two leaf spring portions 41b are deformed equally, so that the conduction member 41B and the housing 10 can be reliably conducted.

[0120] <Fourth embodiment>

[0121] The fourth embodiment of the present invention is a mode in which a conducting member is provided on a substrate. Hereinafter, a measuring device 4 of the fourth embodiment will be described. It should be noted that the same reference numerals are given to the same parts as those of the first to third embodiments, and the description thereof will be omitted.

[0122] Fig.12 4 is a cross-sectional view showing an outline of the measuring device 4. Fig.12The measuring device 4 mainly includes a housing 10A, a substrate 20A, a holder 30B, a conductive portion 40C, a moving member 50 , an elastic member 61 , and conductive wires 81 , 82 , and 83 (partially omitted from the illustration).

[0123] The housing 10A is a columnar (e.g., cylindrical) member made of metal, similarly to the housing 10. The housing 10A has blind holes 11A and 12. The blind hole 11A opens at one end 13 of the housing 10. The base plate 20A, the retainer 30B, and the conducting portion 40C are mainly provided inside the blind hole 11A. An internal thread 11b is formed on the inner peripheral surface 11a of the blind hole 11. The difference between the blind hole 11 and the blind hole 11A is the position and length of the internal thread 11b.

[0124] The substrate 20A is plate-shaped like the substrate 20 and is provided with a magnetic field detection element (not shown). One ends of a plurality of conductive wires 81 , 82 , and 83 are connected to the substrate 20A.

[0125] The holder 30B is cylindrical and made of an insulator similarly to the holder 30. The substrate 20A is fixed to the holder 30B adjacent to one end of the holder 30B.

[0126] By changing the engagement length of the external thread 30a and the internal thread 11b, the substrate 20A and the holder 30B rotate inside the blind hole 11A and change their positions along the direction of the central axis ax. The substrate 20A is provided with a conductive portion 40C. The conductive portion 40C electrically connects the substrate 20A and the housing 10A.

[0127] Fig.13 yes Fig.12 BB cross-sectional view. Fig.13 The hatching indicating the cross section is partially omitted. The conductive portion 40C mainly includes a conductive member 41C and a connecting member 46. The conductive member 41C is a metal plate-shaped member. The conductive member 41C abuts against the inner peripheral surface of the substrate 20A and the blind hole 11A. The connecting member 46 is, for example, a screw, and fixes the substrate 20A and the conductive member 41C.

[0128] The conductive member 41C mainly includes a main body 41i, a plate spring 41b, and a fixed end 41h. The main body 41i is formed by bending a plate-like member into an arc shape. The main body 41i is provided along the outer peripheral surface of the substrate 20A.

[0129] The fixed end 41h is bent relative to the main body 41i and is provided on the substrate 20A by the connecting member 46 in such a manner as to abut against the ground pattern of the substrate 20A. Thus, the conductive member 41C is fixed to the substrate 20A, and the ground pattern of the substrate 20A is conductively connected to the conductive member 41C. It should be noted that the fixed end 41h may not abut against the ground pattern of the substrate 20A, and the connecting member 46 may conductively connect the ground pattern of the substrate 20A to the fixed end 41h.

[0130] The end of the conductive member 41C on the opposite side to the fixed end 41 h is an open end that is not provided on the substrate 20A and is freely movable.

[0131] The main body 41i is provided with a leaf spring 41b that is bent so as to protrude toward the inner peripheral surface 11a of the blind hole 11A. The front end of the leaf spring 41b is a contact portion 41c that contacts the inner peripheral surface 11a.

[0132] According to this embodiment, the front end of the leaf spring portion 41b, i.e., the abutment portion 41c, abuts against the inner peripheral surface 11a, so that the rotation and movement of the substrate 20A and the holder 30A are not blocked during assembly, and the assemblability is good. In addition, the substrate 20A, the holder 30B, and the conductive portion 40C are pre-assembled to form a holder assembly, and the holder assembly is assembled to the housing 10A, so the assemblability is good.

[0133] In addition, according to the present embodiment, the contact portion 41c is pressed against the inner peripheral surface 11a by the biasing force of the leaf spring portion 41b, so that the conductive member 41C (i.e., the substrate 20A) and the housing 10 can be reliably conductively connected. In addition, the conductive member 41C is directly mounted on the substrate 20A, so the ground wire 45 is not required, and assembly is easy.

[0134] It should be noted that, in the present embodiment, the main body 41g is about 1 / 4 of the outer circumference of the substrate 20A, but the length of the main body 41g is not limited to this. For example, the main body 41g may be provided within a range of more than half the outer circumference of the substrate 20A. In addition, the number of leaf spring portions 41b provided in the main body 41g is also not limited to this.

[0135] <Fifth Embodiment>

[0136] The fifth embodiment of the present invention is an embodiment having a plate-shaped conductive member. Hereinafter, a measurement device 5 of the fifth embodiment will be described. It should be noted that the same reference numerals are given to the same parts as those of the first to fourth embodiments, and description thereof will be omitted.

[0137] Fig.14 It is a cross-sectional view schematically showing the measuring device 5 . Fig.15 yes Fig.14CC section view. Fig.14 , 15 The measuring device 5 mainly includes a housing 10B, a substrate 20 , a holder 30C, a conductive portion 40D, a moving member 50 , an elastic member 61 , and conductive wires 81 , 82 , and 83 (partially omitted from the illustration).

[0138] The housing 10B is a columnar (e.g., cylindrical) member made of metal, similarly to the housing 10. The housing 10B has blind holes 11B and 12. The blind hole 11B opens at one end 13 of the housing 10. The base plate 20, the holder 30C, and the conducting portion 40D are mainly arranged inside the blind hole 11B. The blind hole 11B is different from the blind hole 11 in that an internal thread 11b is formed on the entire inner peripheral surface.

[0139] The holder 30C is cylindrical and made of an insulator similar to the holder 30. The substrate 20 is fixed to the holder 30B adjacent to one end of the holder 30C. By changing the engagement length of the external thread 30a and the internal thread 11b, the substrate 20 and the holder 30C rotate inside the blind hole 11B and change their positions along the direction of the central axis ax.

[0140] The holder 30C is provided with a conductive portion 40D. The conductive portion 40D electrically connects the substrate 20 and the housing 10B.

[0141] The conductive portion 40D mainly includes a conductive member 41D and a ground line 45. The ground line 45 is a conductive wire that connects the substrate 20 and the conductive member 41D. One end of the ground line 45 is provided on the ground pattern of the substrate 20, and the other end of the ground line 45 is provided on the protrusion 41j of the conductive member 41D.

[0142] The conductive member 41D is provided inside the blind hole 11B so as to abut against the inner peripheral surface of the holder 30C and the blind hole 11B. The conductive member 41 is a metal plate-shaped member. The conductive member 41D is provided in the groove 30f provided in the holder 30C by press fitting or the like. Thus, the conductive member 41 is fixed to the holder 30.

[0143] The substrate 20, the holder 30C, and the conductive portion 40D are pre-assembled to form a holder assembly, and the holder assembly is assembled to the housing 10. At this time, the substrate 20 and the holder 30C are rotated and positioned inside the blind hole 11B without setting the conductive member 41D in the groove 30f, and then the conductive member 41D is inserted into the groove 30f and pressed between the holder 30C and the inner peripheral surface of the blind hole 11B. In this way, the substrate 20 and the holder 30C can be fixed inside the blind hole 11B without bonding the holder 30C to the housing 10.

[0144] According to the present embodiment, since the conductive member 41D is press-fitted between the holder 30C and the inner peripheral surface of the blind hole 11B, the conductive member 41D (ie, the substrate 20 ) and the housing 10 can be reliably conductively connected.

[0145] Furthermore, according to the present embodiment, since the substrate 20 , the holder 30C, and the conductive portion 40D are assembled in advance to form a holder assembly, and the holder assembly is assembled to the housing 10B, the assemblability is excellent.

[0146] <Sixth embodiment>

[0147] The sixth embodiment of the present invention is a mode in which the ground wire 45 is not used. Hereinafter, the measuring device 6 of the sixth embodiment will be described. It should be noted that the same reference numerals are given to the same parts as those of the first to fifth embodiments, and the description thereof will be omitted.

[0148] Fig.16 It is a cross-sectional view showing the outline of the measuring device 6 . Fig.17 6 is a top view of the measuring device 6 observed along the central axis ax. Fig.16 The measuring device 6 mainly includes a housing 10 , a substrate 20 , a holder 30D, a conductive portion 40E, a moving member 50 , an elastic member 61 , and conductive wires 81 , 82 , and 83 (not shown).

[0149] The holder 30D is cylindrical and made of an insulator similarly to the holder 30. The substrate 20 is fixed to the holder 30D adjacent to one end of the holder 30D (here, the bottom surface 11c side of the blind hole 11). The holder 30D is different from the holder 30 in that it does not have the grooves 30b and 30d.

[0150] The conductive part 40E is a conductive part that uses a metal plate-shaped member and electrically connects the substrate 20 and the housing 10. The conductive part 40E mainly includes a main body 40a and a leaf spring 40b. One end of the main body 40a is set on the substrate 20 by a screw or the like, and the leaf spring 40b is set at the other end of the main body 40a.

[0151] The leaf spring portion 40b is elastically deformable by bending a plate-like member into an arc shape. The leaf spring portion 40b also serves as a contact portion that contacts the inner peripheral surface 11a. That is, the conductive portion 40E is provided inside the blind hole 11 so as to contact the substrate 20 and the inner peripheral surface 11a.

[0152] According to this embodiment, the leaf spring portion 40b bent into an arc shape abuts against the inner peripheral surface 11a, so the rotation and movement of the holder 30D are not blocked during assembly, and the assembly performance is good. In addition, the substrate 20, the holder 30D and the conductive portion 40E are pre-assembled to form a holder assembly, and the holder assembly is assembled to the housing 10, so the assembly performance is good.

[0153] Furthermore, according to the present embodiment, the leaf spring portion 40 b is pressed against the inner peripheral surface 11 a by the biasing force of the leaf spring portion 40 b , so that the conductive portion 40E (ie, the substrate 20 ) can be reliably conductively connected to the metal housing 10 .

[0154] <Seventh embodiment>

[0155] The seventh embodiment of the present invention is a mode in which the ground wire 45 is not used. Hereinafter, the measuring device 7 of the seventh embodiment will be described. It should be noted that the same reference numerals are given to the same parts as those of the first to sixth embodiments, and the description thereof will be omitted.

[0156] Fig.18 It is a cross-sectional view showing the outline of the measuring device 7. Fig.19 FIG. 7 is a top view of the measuring device 7. Fig.18 The measuring device 7 mainly includes a housing 10 , a substrate 20 , a holder 30D, a conductive portion 40F, a moving member 50 , an elastic member 61 , and conductive wires 81 , 82 , and 83 (not shown).

[0157] The conductive part 40F is a conductive part that uses a metal plate-shaped member and electrically connects the substrate 20 and the housing 10. The conductive part 40F mainly includes a main body 40a and a leaf spring 40c. One end of the main body 40a is set on the substrate 20 by a screw or the like, and the leaf spring 40c is set at the other end of the main body 40a.

[0158] The leaf spring portion 40c is a plate-shaped member and can be elastically deformed. The leaf spring portion 40c has a contact portion 40d formed by bending the plate-shaped member into an arc shape. The contact portions 40d are respectively provided at both ends of the leaf spring portion 40c and contact the inner peripheral surface 11a. That is, the conductive portion 40F is provided inside the blind hole 11 in a manner contacting the substrate 20 and the inner peripheral surface 11a.

[0159] According to this embodiment, the arc-shaped contact portion 40d contacts the inner circumferential surface 11a, so the rotation and movement of the holder 30D are not blocked during assembly, and the assembly performance is good. In addition, the substrate 20, the holder 30D and the conductive portion 40F are pre-assembled to form a holder assembly, and the holder assembly is assembled to the housing 10, so the assembly performance is good.

[0160] According to the present embodiment, the contact portion 40d is pressed against the inner peripheral surface 11a by the biasing force of the leaf spring portion 40c, and the plurality of contact portions 40d contact the inner peripheral surface 11a, so that the conductive portion 40F (ie, the substrate 20) can be reliably conductively connected to the metal housing 10.

[0161] <Eighth Embodiment>

[0162] The eighth embodiment of the present invention is a method using a wave spring. Hereinafter, the measuring device 8 of the eighth embodiment will be described. It should be noted that the same reference numerals are used for the same parts as those of the first to seventh embodiments, and the description thereof will be omitted.

[0163] Fig. 20 , 21 is a cross-sectional view showing an outline of the measuring device 8. Fig. 20 , 21 The measurement device 8 mainly includes a housing 10C, a substrate 20 , a holder 30D, a conductive portion 40G, a moving member 50 , an elastic member 61 , and conductive wires 81 , 82 , and 83 (not shown).

[0164] The housing 10C is a columnar (e.g., cylindrical) member made of metal, similarly to the housing 10. The housing 10C has blind holes 11C and 12. The blind hole 11C opens at one end 13 of the housing 10C. The base plate 20, the retainer 30D, and the conducting portion 40G are mainly provided inside the blind hole 11C. The blind hole 11C is different from the blind hole 11 in that a recess 11e is provided on the bottom surface 11d, and in the position and length of the internal thread 11b.

[0165] The conductive portion 40G is a wave spring using a metal plate-shaped member, and is a conductive member that electrically connects the substrate 20 and the housing 10. The conductive portion 40G is provided between the substrate 20 and the recessed portion 11e in the blind hole 11C.

[0166] The conductive portion 40G is formed with an elastically deformable spring portion by bending a plate-like member. The arc-shaped portion of the conductive portion 40G contacts the recess 11e and the substrate 20 (here, the ground pattern of the substrate 20). The conductive portion 40G has a large diameter and is provided in the recess 11e, so the position of the conductive portion 40G is stable.

[0167] According to the present embodiment, the arc-shaped portion of the conductive portion 40G contacts the recess 11 e , so that the conductive portion 40G is not caught during assembly to prevent the rotation or movement of the holder 30D, thereby improving assembly performance.

[0168] According to the present embodiment, the conductive portion 40G is pressed against the recess 11 e by the biasing force of the conductive portion 40G and abuts against the recess 11 e at multiple locations, so that the conductive portion 40G (ie, the substrate 20 ) can be reliably conductively connected to the metal housing 10 .

[0169] <Eighth Embodiment>

[0170] The ninth embodiment of the present invention is a mode in which a protrusion is formed on a conductive member. Hereinafter, a measuring device 9 of the ninth embodiment will be described. It should be noted that the same reference numerals are given to the same parts as those of the first to eighth embodiments, and description thereof will be omitted.

[0171] Fig. 22 1 is a perspective view showing the outline of the measuring device 9. The measuring device 9 mainly includes a housing 10 and a substrate 20 ( Fig. 22 (not shown in the figure), the holder 30E, the conductive portion 40H, the moving member 50, the elastic member 61 (in Fig. 22 Figure omitted) and wires 81, 82, 83 (81, 83 are Fig. 22 Figure omitted).

[0172] The holder 30E is a cylindrical member formed of an insulator similarly to the holder 30, and fixes the substrate 20. The holder 30E is different from the holder 30 in that the holder 30 has a groove 30d, while the holder 30E has a groove 30g.

[0173] The conductive portion 40H electrically connects the substrate 20 and the housing 10. The conductive portion 40H mainly includes a conductive member 41E and a ground line 45 (at Fig. 22 The ground wire 45 connects the substrate 20 to the conductive member 41E. The conductive member 41E is provided in the groove 30b and is secured by the flange 30c (in the Fig. 22 (illustration omitted) positioning.

[0174] Fig.23 is a cross-sectional view showing an outline of the measuring device 9. Fig.23 The conductive member 41E is a metal plate-shaped member. The conductive member 41E abuts against the inner peripheral surface 11a of the blind hole 11, so that the conductive portion 40H electrically connects the substrate 20 and the housing 10.

[0175] Fig.24 41E is a perspective view schematically showing the conductive member 41E. The conductive member 41E mainly includes a main body portion 41f, a fixed end 41k, a leaf spring portion 41m, and a protrusion 41n.

[0176] The main body 41f is provided with a leaf spring 41m that is bent and elastically deformable so as to protrude toward the inner peripheral surface 11a of the blind hole 11. In the present embodiment, the leaf spring 41m is triangular in shape, but the shape of the leaf spring 41m is not limited thereto and may be, for example, an arc shape.

[0177] A protrusion 41n is formed at the front end of the leaf spring portion 41m. The protrusion 41n is in the shape of a spherical cap. The spherical cap shape refers to a shape obtained by cutting a part of a sphere using a plane. The front end of the leaf spring portion 41m is formed into an arc shape by bending a plate-like member, and the protrusion 41n is formed at the front end (the most protruding part).

[0178] It should be noted that, in the present embodiment, the protrusion 41n is a spherical cap shape whose height is lower than the radius of the ball before the protrusion 41n is cut, but the form of the protrusion 41n is not limited to this. For example, the protrusion 41n may also be a spherical cap shape whose height is higher than the radius of the ball before the protrusion 41n is cut. In addition, for example, the protrusion 41n may also be a shape obtained by placing a spherical cap shape at the front end of a cylinder.

[0179] Both ends of the conductive member 41E are fixed ends 41k. The fixed ends 41k are bent relative to the main body 41f. The fixed ends 41k have a leaf spring portion 411 bent in a U shape and a plate-like portion 41o. The plate-like portion 41o is provided with a through hole 41p for providing a ground line 45 (not shown).

[0180] return Fig.23 The fixed end 41k is set in the groove 30g provided in the retainer 30E by press-fitting or the like. Thus, the conductive member 41E is fixed to the retainer 30E. A leaf spring portion 411 is provided at the front end of the fixed end 41k, and the leaf spring portion 411 presses the inner peripheral surface of the groove 30g, so that the fixed end 41k is difficult to come out of the groove 30g.

[0181] When the projection 41n contacts the inner peripheral surface 11a, the leaf spring portion 41m deforms so that the height of the leaf spring portion 41m decreases. Therefore, the projection 41n is pressed against the inner peripheral surface 11a by the biasing force of the leaf spring portion 41m, and the conductive member 41E is conductively connected to the housing 10.

[0182] Since the protrusion 41n is in a spherical cap shape, the protrusion 41n is in point contact with the inner peripheral surface 11a. Therefore, the contact area between the protrusion 41n and the inner peripheral surface 11a is narrow, and the pressure of the protrusion 41n pressing the inner peripheral surface 11a becomes stronger.

[0183] In addition, the leaf spring portion 41m and the protrusion 41n are arranged at a position overlapping with the line L passing through the central axis ax when viewed along the central axis ax. Therefore, the forces of the two protrusions 41n when pressing the inner peripheral surface 11a are respectively along the line L, and the directions thereof are opposite, so the forces of the protrusions 41n pressing the inner peripheral surface 11a do not deviate, and the protrusions 41n press the inner peripheral surface 11a more reliably.

[0184] The leaf spring portion 41m is elastically deformed to expand the main body 41f. The main body 41f is provided within a half circumference of the holder 30E (main body 41f is long), so even if the main body 41f is deformed, no problem occurs in the conductive member 41E.

[0185] Next, use Fig. 22 The assembly of the measuring device 9 will be described. The substrate 20 , the holder 30E, and the conductive portion 40H are assembled in advance to form a holder assembly. The holder assembly is assembled to the housing 10 to form the measuring device 9 .

[0186] During assembly, the engagement length of the external thread 30a and the internal thread 11b is adjusted to adjust the position of the magnetic field detection element provided in the holder assembly, i.e., the substrate 20, in the direction of the central axis ax. After the position of the magnetic field detection element is determined, the holder 30E is fixed to the housing 10 by bonding or the like.

[0187] When the holder assembly is inserted into the blind hole 11, the protrusion 41n contacts the inner peripheral surface 11a. In addition, when the outer thread 30a and the inner thread 11b are screwed together to rotate the holder assembly, the protrusion 41n slides on the inner peripheral surface 11a. Both ends of the conductive member 41E are fixed ends 41k, and both ends of the conductive member 41E are fixed to the holder 30E, so the conductive member 41E does not become an obstacle when the holder assembly is rotated.

[0188] The projection 41n is spherical and in point contact with the inner peripheral surface 11a. Therefore, the projection 41n does not get caught on the inner peripheral surface 11a to block the rotation or movement of the holder 30E, or the conductive member 41E does not deviate from the holder 30E.

[0189] According to this embodiment, the projection 41n contacts the inner peripheral surface 11a at points, so the contact area between the projection 41n and the inner peripheral surface 11a is narrow, and the pressure of the projection 41n pressing the inner peripheral surface 11a is increased. Therefore, the conductive member 41E and the housing 10 can be more reliably conductive.

[0190] In addition, according to the present embodiment, the fixed ends 41k at both ends of the conductive member 41E are fixed to the holder 30E, so the assemblability of the holder assembly is improved. For example, in the case of the measuring device 1 in which one end is the open end 41d, when the holder assembly is rotated to adjust the position of the magnetic field detection element along the direction of the central axis ax, the open end 41d may be hooked on the inner peripheral surface 11a depending on the rotation direction, causing the conductive member 41 to fall out. In contrast, in the conductive member 41E in which both ends are the fixed ends 41k, such an undesirable situation does not occur, and the assemblability is good. In addition, the protrusion 41n is in point contact with the inner peripheral surface 11a, so it is easier to rotate the holder assembly than in the case where the abutment portion is in line contact with the inner peripheral surface 11a.

[0191] In the present embodiment, the conductive member 41E has two leaf springs 41m and protrusions 41n, but the conductive member 41E may have three or more leaf springs 41m and protrusions 41n. For example, a conductive member having three leaf springs 41m and protrusions 41n arranged at intervals of 60 degrees may be used.

[0192] In addition, in the present embodiment, the conduction member 41E includes the plate spring portion 41m and the protrusion 41n, but the protrusion 41n is not essential. Fig.25 2 is a cross-sectional view showing an overview of a measurement device 9A according to a modified example. Fig.25 The measuring device 9A mainly comprises a housing 10, a substrate 20 (in Fig.25 ), the holder 30F, the conductive portion 40I, the moving member 50 (in Fig.25 Figure omitted), elastic member 61 (in Fig.25 Figure omitted) and wires 81, 82, 83 (in Fig.25 Figure omitted).

[0193] The holder 30F is a cylindrical member formed of an insulator similarly to the holder 30, and the substrate 20 is fixed thereto. The difference between the holder 30 and the holder 30F is the number of grooves 30d. The holder 30F has two grooves 30d.

[0194] The conductive portion 40I electrically connects the substrate 20 and the housing 10. The conductive portion 40I mainly includes a conductive member 41F and a ground line 45 (at Fig.25 The ground wire 45 connects the substrate 20 to the conductive member 41F. The conductive member 41F is provided in the groove 30b and is secured by the flange 30c (in the Fig.25 (illustration omitted) positioning.

[0195] The conducting member 41F mainly includes a main body 41f, a leaf spring 41b, and a fixed end 41e. That is, the conducting member 41A of the measuring device 2 of the second embodiment has one end as the fixed end 41e, whereas the conducting member 41F is different from the conducting member 41 in that both ends are fixed ends 41e.

[0196] In this modification as well, since the fixed ends 41 e at both ends of the conduction member 41F are fixed to the holder 30F, the assemblability of the holder assembly is improved.

[0197] <Tenth embodiment>

[0198] In the ninth embodiment of the present invention, the conductive member has a plurality of leaf spring portions and protrusions, but the conductive member may have only one leaf spring portion and protrusion. The following describes the measuring device 15 of the tenth embodiment. It should be noted that the same reference numerals are used for the same parts as those in the first to ninth embodiments, and the description thereof is omitted.

[0199] Fig.26 1 is a cross-sectional view showing an outline of the measuring device 15. Fig.25 The measuring device 15 mainly comprises a housing 10, a substrate 20 (in Fig.26 ), the holder 30E, the conductive portion 40J, the moving member 50 (in Fig.26 Figure omitted), elastic member 61 (in Fig.26 Figure omitted) and wires 81, 82, 83 (in Fig.26 Figure omitted).

[0200] The conductive portion 40J electrically connects the substrate 20 and the housing 10. The conductive portion 40J mainly includes a conductive member 41G and a ground line 45 ( Fig.26 The ground wire 45 connects the substrate 20 to the conductive member 41G. The conductive member 41G is provided in the groove 30b and is secured by the flange 30c (in the Fig.26 (illustration omitted) positioning.

[0201] The conductive member 41G mainly includes a main body 41a, a fixed end 41k, a leaf spring 41m, and a protrusion 41n. The conductive member 41G is different from the conductive member 41E in that the conductive member 41E includes two leaf springs 41m and protrusions 41n, while the conductive member 41G includes one leaf spring 41m and protrusion 41n.

[0202] Both ends of the conductive member 41G serve as fixed ends 41 e . Since both ends of the conductive member 41G are fixed to the holder 30F, the conductive member 41G does not become an obstacle when the holder assembly is rotated.

[0203] In the present embodiment, both ends of the conductive member 41G serve as fixed ends 41k and both ends of the conductive member 41G are fixed to the holder 30E. Therefore, the conductive member 41F does not become an obstacle when the holder assembly is rotated, and the assemblability is good.

[0204] It should be noted that the conductive member 41G may include a fixed end 41e instead of the fixed end 41k. In addition, the conductive member 41G may include a leaf spring portion 41b instead of the leaf spring portion 41m and the protrusion 41n.

[0205] <Eleventh Embodiment>

[0206] In the ninth embodiment of the present invention, the conductive portion has one conductive member, but the conductive portion may also have a plurality of conductive members. Hereinafter, the measuring device 16 of the eleventh embodiment will be described. It should be noted that the same reference numerals are used for the same parts as those of the first to tenth embodiments, and the description thereof will be omitted.

[0207] Fig. 27 1 is a cross-sectional view showing an outline of the measuring device 16. Fig. 27 The measuring device 16 mainly comprises a housing 10, a substrate 20 (in Fig. 27 ), the holder 30G, the conductive portion 40K, the moving member 50 (in Fig. 27 Figure omitted), elastic member 61 (in Fig. 27 Figure omitted) and wires 81, 82, 83 (in Fig. 27 Figure omitted).

[0208] The holder 30G is a cylindrical member formed of an insulator similarly to the holder 30A, and the substrate 20 is fixed thereto. The difference between the holder 30A and the holder 30H is the number of grooves 30d. The holder 30G has four grooves 30d.

[0209] The conductive portion 40K electrically connects the substrate 20 and the housing 10. The conductive portion 40K mainly includes two conductive members 41H and a ground line 45 (at Fig. 27 The ground wire 45 connects the substrate 20 to the conductive member 41H. The conductive member 41H is provided in the groove 30b and is secured by the flange 30c (in Fig. 27 (illustration omitted) positioning.

[0210] The conductive member 41H mainly includes a main body 41g, a leaf spring 41b, and a fixed end 41e. That is, while the conductive member 41B of the measuring device 3 of the third embodiment has one end as the fixed end 41e, the conductive member 41H is different from the conductive member 41B in that both ends are fixed ends 41e.

[0211] Both ends of the conductive member 41H serve as fixed ends 41 e , and both ends of the conductive member 41H are fixed to the holder 30G. Therefore, the conductive member 41H does not become an obstacle when the holder assembly is rotated.

[0212] It should be noted that the conductive member 41H may include a fixed end 41k instead of the fixed end 41e. In this case, the holder 30G may include a groove 30g instead of the groove 30d.

[0213] In the present embodiment, both ends of the conductive member 41H serve as fixed ends 41 e and both ends of the conductive member 41G are fixed to the holder 30G. Therefore, the conductive member 41H does not become an obstacle when the holder assembly is rotated, and the assemblability is good.

[0214] <Twelfth embodiment>

[0215] The twelfth embodiment of the present invention is a mode in which the conductive member is fixed only at one end and has a protrusion. Hereinafter, the measuring device 17 of the twelfth embodiment will be described. It should be noted that the same reference numerals are given to the same parts as the first to eleventh embodiments, and the description thereof will be omitted.

[0216] Fig.28 1 is a cross-sectional view showing an outline of the measuring device 17. Fig.28 The measuring device 17 mainly comprises a housing 10, a substrate 20 (in Fig.28 ), the holder 30, the conductive portion 40L, the moving member 50 (in Fig.28 Figure omitted), elastic member 61 (in Fig.28 Figure omitted) and wires 81, 82, 83 (in Fig.28 Figure omitted).

[0217] The conductive portion 40L electrically connects the substrate 20 and the housing 10. The conductive portion 40L mainly includes a conductive member 41I and a ground line 45 ( Fig.28 The ground wire 45 connects the substrate 20 to the conductive member 41I. The conductive member 41I is provided in the groove 30b and is secured by the flange 30c (in the Fig.28 (illustration omitted) positioning.

[0218] The conductive member 41I mainly includes a main body 41a, a leaf spring 41b, an open end 41d, a fixed end 41e, and a protrusion 41n. The protrusion 41n is formed at the front end of the leaf spring 41b. That is, the conductive member 41I has the protrusion 41n in addition to the structure of the conductive member 41 of the measuring device 1 of the first embodiment.

[0219] According to this embodiment, the projection 41n contacts the inner peripheral surface 11a at points, so the contact area between the projection 41n and the inner peripheral surface 11a is narrow, and the pressure of the projection 41n pressing the inner peripheral surface 11a is increased. Therefore, the conductive member 41I and the housing 10 can be more reliably conductively connected.

[0220] It should be noted that, in the present embodiment, the conductive member 41I includes one leaf spring portion 41b and one protrusion 41n, but the conductive member 41I may include two or more leaf spring portions 41b and protrusions 41n.

[0221] In addition, in the present embodiment, the conduction portion 40L includes one conduction member 41I, but the conduction portion may include two or more conduction members. Fig.29 1 is a cross-sectional view showing an overview of a measurement device 17A according to a modified example. Fig.29 The measuring device 17A mainly comprises a housing 10, a substrate 20 (in Fig.29 ), the holder 30A, the conductive portion 40M, the moving member 50 (in Fig.29 Figure omitted), elastic member 61 (in Fig.29 Figure omitted) and wires 81, 82, 83 (in Fig.29 Figure omitted).

[0222] The conductive portion 40M electrically connects the substrate 20 and the housing 10. The conductive portion 40M mainly includes two conductive members 41J and a ground line 45 (at Fig.29 The conductive member 41J is provided in the groove 30b and is secured by the flange 30c (in the Fig.29 (illustration omitted) positioning.

[0223] The conductive member 41J mainly includes a main body 41g, a leaf spring 41b, an open end 41d, a fixed end 41e, and a protrusion 41n. The protrusion 41n is formed at the front end of the leaf spring 41b. That is, the conductive member 41J has the structure of the conductive member 41B of the measuring device 3 of the third embodiment and also has the protrusion 41n.

[0224] In this modification, the protrusion 41 n is also in point contact with the inner peripheral surface 11 a . Therefore, the pressure of the protrusion 41 n pressing the inner peripheral surface 11 a is strong, and the conductive member 41I and the housing 10 can be more reliably conductively connected.

[0225] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the specific structure is not limited to the present embodiment, and also includes design changes within the scope of the main purpose of the present invention. For example, the above-mentioned embodiments are described in detail in order to easily understand the present invention, and are not necessarily limited to having all the structures described. In addition, a part of the structure of the embodiment can be replaced with the structure of other embodiments, and in addition, other structures can be added, deleted, replaced, etc. to the structure of the embodiment.

[0226] In addition, "substantially" refers to the concept of not only including strictly identical situations, but also including errors and deformations to the extent that the sameness is not lost. For example, "cylindrical shape" is not limited to the situation of being strictly cylindrical, and includes, for example, the concept of being able to be regarded as equivalent to a cylindrical shape. In addition, for example, in the case of only being orthogonal, parallel, consistent, etc., it includes not only the situation of being strictly orthogonal, parallel, consistent, etc., but also the situation of being substantially parallel, substantially orthogonal, substantially consistent, etc.

[0227] In addition, "nearby" refers to an area including a certain range (which can be set arbitrarily) near the reference position. For example, in the case of "near the end", it refers to an area in a certain range near the end, which is a concept that may or may not include the end.

[0228] Description of Reference Numerals

[0229] 1, 2, 3, 4, 5, 6, 7, 8: Measurement device

[0230] 10, 10A, 10B, 10C: Shell

[0231] 10a: Insertion

[0232] 10b: Non-insertion part

[0233] 11, 11A, 11B, 11C, 12: Blind hole

[0234] 11a: Inner circumference

[0235] 11b: Internal thread

[0236] 11c, 11d: Bottom surface

[0237] 11e: Concave

[0238] 12a: Space

[0239] 12b: Space

[0240] 12c: Bottom

[0241] 13, 14: End

[0242] 20, 20A: substrate

[0243] 30, 30A, 30B, 30C, 30D, 30E, 30F, 30G, 30H: Retaining parts

[0244] 30a: External thread

[0245] 30b: Slot

[0246] 30c: Flange

[0247] 30d, 30f, 30g: Slot

[0248] 30e: convex part

[0249] 40, 40A, 40B, 40C, 40D, 40E, 40F, 40G, 40H, 40I, 40J, 40K, 40L, 40M: Conductive part

[0250] 40a: Main body

[0251] 40b, 40c: leaf spring part

[0252] 40d: abutment portion

[0253] 41, 41A, 41B, 41C, 41D, 41E, 41F, 41G, 41H, 41I, 41J: Conductive components

[0254] 41a, 41f, 41g, 41i: Main body

[0255] 41b, 41l, 41m: leaf spring part

[0256] 41c: contact portion

[0257] 41d: Open end

[0258] 41e, 41h, 41k: Fixed end

[0259] 41j: protrusion

[0260] 41n: protrusion

[0261] 41o: plate-shaped part

[0262] 41p: Through hole

[0263] 45: Ground

[0264] 46: Connecting components

[0265] 50: Mobile components

[0266] 51: Slide valve

[0267] 52: Magnet

[0268] 61: Elastic member

[0269] 62: Fixed components

[0270] 71, 72: Sealing components

[0271] 81, 82, 83: Wire

[0272] 100: Filter device

[0273] 110: Shell

[0274] 110a: Internal thread

[0275] 111: Release

[0276] 112, 113: Sealing components

[0277] 120: Filter element

[0278] 123a: Hollow part

[0279] 126: Inner tube

[0280] 127: Filter material

[0281] 128, 129: Board

[0282] 130: Head

[0283] 131: Main body

[0284] 131a: External thread

[0285] 132: Central tube

[0286] 132a: concave part

[0287] 133: Inflow Road

[0288] 134: Outflow

[0289] 135: Install blind holes

[0290] 136: Through hole.

Claims

1. A measuring device, characterized in that: The measuring device comprises: A housing, which is made of metal and is cylindrical, and has a first blind hole opened at one end; a retaining member formed of an insulator and having a cylindrical shape, and arranged inside the first blind hole to be rotatable and movable along the axis of the first blind hole; A plate-shaped substrate, which is fixed to the holding member and is disposed inside the first blind hole; as well as a conductive portion that electrically connects the substrate and the housing and includes a conductive member using a metal plate-shaped member, The conducting member has a leaf spring portion that is elastically deformable. The conductive member is in line contact or point contact with the first blind hole.

2. The measuring device according to claim 1, characterized in that The measuring device includes a wire, one end of which is provided on the substrate, the other end of which is provided on the conductive member, and the wire connects the substrate and the conductive member. The conducting member is formed by the arc-shaped plate-like member and has a main body portion and the leaf spring portion. The main body is arranged along the outer peripheral surface of the holder or the substrate. The leaf spring portion is bent so as to protrude toward the inner peripheral surface of the first blind hole. The front end of the leaf spring portion is in an arc shape and abuts against the inner peripheral surface of the first blind hole.

3. The measuring device according to claim 1, characterized in that The measuring device includes a wire, one end of which is provided on the substrate, the other end of which is provided on the conductive member, and the wire connects the substrate and the conductive member. The conducting member is formed by the arc-shaped plate-like member and has a main body portion and the leaf spring portion. The main body is arranged along the outer peripheral surface of the holder or the substrate. The leaf spring portion is bent so as to protrude toward the inner peripheral surface of the first blind hole. A protrusion is formed at the front end of the leaf spring portion, and the protrusion abuts against the inner peripheral surface of the first blind hole.

4. The measuring device according to claim 2 or 3, characterized in that The conducting member has two leaf spring portions, The leaf spring portion is disposed at a position overlapping a line passing through the central axis of the first blind hole when viewed along the central axis.

5. The measuring device according to any one of claims 2 to 4, characterized in that One end of the conductive member is bent and disposed at a fixed end of the groove of the retainer, and the other end of the conductive member is an open end not disposed at the retainer.

6. The measuring device according to any one of claims 2 to 4, characterized in that Both ends of the conducting member are bent and arranged at fixed ends of the groove of the retaining member.

7. The measuring device according to claim 1, characterized in that The conductive member includes a contact portion formed by bending the plate-like member into an arc shape. The abutting portion abuts against an inner peripheral surface of the first blind hole.

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