Voltage input part, voltage input unit, and measurement device

Abstract

This voltage input part includes: a plurality of input terminals to which conductor portions of a plurality of connection codes can be connected; an input panel; a substrate; and a resistance element. The input panel includes, for respective input terminals, a plurality of hollow accommodation parts, each of which accommodates the corresponding input terminal and a substrate electrical path part where a wiring pattern connected to the input terminal is provided in the substrate. The substrate has a gap between the adjacent substrate electrical path parts, and in each of the substrate electrical path parts, a resistance part having a resistance element is disposed in the wiring pattern.

Description

Voltage input section, voltage input unit and measuring device

[0001] The present invention relates to a voltage input section, a voltage input unit, and a measuring device.

[0002] JP2013-234990A discloses a measurement module in which an internal space is divided into two by a partition that is a non-magnetic insulating part, with a pair of current paths arranged in one space and low-voltage components arranged in the other space.

[0003] In the input section of the module as described above, the pair of current paths and the low-voltage components are arranged separately in different spaces separated by a partition, so that the low-voltage components are protected from the large voltages and currents of the pair of current paths.

[0004] However, when a large current or voltage is input to a pair of current paths, it may be necessary to widen the gap between the pair of current paths or to cover each current path with an insulating material in order to ensure the creepage distance and clearance distance between the current paths required by international standards, etc. Furthermore, when covering each current path with an insulating material, the number of steps increases due to the addition of components, and space must be secured to install the additional components.

[0005] In this way, in order to ensure the creepage distance and spatial distance between the electric paths arranged in the input section, it is necessary to widen the gap between the pair of electric paths or to ensure space for installing a partition, which creates the problem that it becomes difficult to miniaturize the input section.

[0006] The present invention has been made in view of the above problems, and has as its object to reduce the size of the input section while ensuring creepage distances and spatial distances between wiring patterns.

[0007] In one aspect of the present invention, a voltage input unit includes a plurality of input terminals to which conductor portions of a plurality of connection cords can be respectively connected, an input panel, a substrate, and a resistive element. The input panel includes a plurality of hollow housing portions for housing the input terminals and substrate electrical wiring portions, which are portions of the substrate on which wiring patterns connected to the input terminals are provided. The substrate has gaps between adjacent substrate electrical wiring portions, and the substrate electrical wiring portions have resistor portions with the resistive elements disposed in the wiring patterns.

[0008] According to this aspect, a hollow housing portion is formed in the input panel for housing each input terminal and a board electrical path portion, which is a portion of the board on which a wiring pattern connected to the input terminal is provided, and adjacent board electrical path portions are spaced apart, and the board electrical path portions have resistor portions having the resistive elements disposed in the wiring pattern. Therefore, the hollow housing portion not only houses the input terminal for connection to the connection cord but also serves to isolate the wiring patterns of adjacent board electrical path portions, thereby ensuring the creepage distance and clearance distance required by the standard without providing a separate partition between the wiring patterns of adjacent board electrical path portions or increasing the spacing between the wiring patterns of adjacent board electrical path portions.

[0009] Therefore, compared to conventional configurations in which the input panel does not have multiple hollow storage sections to accommodate substrate electrical circuit sections in which resistive elements are arranged on wiring patterns connected to input terminals, it is possible to have the storage section accommodate not only the input terminals but also the substrate electrical circuit sections in which resistive elements are arranged, so there is no need to widen the gap between a pair of current paths or to secure space to install a partition, and the size of the voltage input section can be reduced while ensuring the creepage distance and spatial distance between resistive elements on the wiring patterns of adjacent substrate electrical circuit sections.

[0010] FIG. 1 is a top view showing the appearance of a voltage input unit according to a first embodiment. FIG. 2 is an exploded view showing the appearance of a substrate constituting the voltage input unit. FIG. 3 is a cross-sectional view of the voltage input unit taken along line III-III shown in FIG. 1. FIG. 4 is a cross-sectional view of the voltage input unit taken along line IV-IV shown in FIG. 1. FIG. 5 is an explanatory diagram showing the structure of the voltage input unit. FIG. 6 is a block diagram showing the configuration of a measurement device including a voltage input unit according to a second embodiment.

[0011] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In this specification, the same or equivalent elements are designated by the same reference numerals throughout.

[0012] First Embodiment A voltage input section according to a first embodiment will be described with reference to FIGS. 1 to 3. FIG.

[0013] FIG. 1 is a top view showing the appearance of a voltage input unit according to the first embodiment.

[0014] The voltage input unit 10 is an input unit that inputs a plurality of voltages, and is employed, for example, in a portion that inputs voltages from the outside to a board within the housing of a measuring device, a logger device, or the like.

[0015] The voltage input unit 10 is composed of a plurality of input terminals 122 (see FIG. 2), an input panel 1, and a substrate 2 including a plurality of wiring patterns 21 corresponding to the respective input terminals 122. The plurality of wiring patterns 21 are arranged side by side on the substrate 2. The wiring patterns 21 are electrically connected to the input terminals 122 via fixing screws 14 (see FIG. 3).

[0016] A high voltage of, for example, several hundred volts to several thousand volts is input to the input terminal 122. The input terminal 122 is formed, for example, of a cylindrical hollow conductor, and in the first embodiment, a banana socket into which a banana plug can be inserted is used. Note that the input terminal 122 does not have to be a banana socket, and may be any terminal that can be electrically connected to a conductor portion at the base end of a connection cord, which will be described later.

[0017] The input panel 1 is a panel for inputting voltage to a circuit board 2 in a housing by connecting connection cords (not shown) from the front of the input panel 1, which is the surface viewed from the left side in FIG. 1 . The exterior of the input panel 1 is formed of an insulating material such as plastic. The input panel 1 of the first embodiment is configured so that three pairs of base ends of a pair of connection cords, to which voltage is supplied through one channel CH, can be inserted and removed. That is, the input panel 1 has connection ports for three voltage channels CH1 to CH3.

[0018] The connection cord has electric wires covered with an insulating coating, and conductor portions exposed at the distal and proximal ends of the connection cord. A voltage of, for example, several volts to several thousand volts is applied between a pair of connection cords. Examples of connection cords include cables used to detect voltages in electric motors and high-voltage batteries. A banana plug is provided on the conductor portion at the proximal end of the connection cord. The conductor portion at the proximal end of the connection cord does not necessarily need to be provided with a banana plug, as long as it can be electrically connected to the input terminal 122.

[0019] The input panel 1 includes a plate-shaped housing panel 11 that forms one side of the housing of the unit or device, a board electrical wiring section 22 (described later), and a hollow housing section 13 that protrudes inward from the housing panel 11.

[0020] The connector 12 constitutes a part of the housing 13. The connector 12 is configured so that the base end of the connection cord can be inserted therein. The connector 12 includes a resin portion 121A that covers the outer periphery of the input terminal 122. Note that the connector 12 only needs to be capable of electrically connecting the input terminal 122 to a conductor portion provided at the base end of the connection cord. The connector 12 does not need to protrude outward from the front surface of the housing panel 11, and the resin portion 121A may be omitted. The shape of the connector 12 may be elliptical or polygonal. The connector 12 of the first embodiment includes a cylindrical portion 121 that restricts the insertion distance of the base end of the connection cord, and an input terminal 122 formed on the inner periphery of the cylindrical portion 121.

[0021] The accommodation section 13 is formed hollow and accommodates the input terminal 122 and a board electrical path section 22, which is a portion of the board 2 where the wiring pattern 21 connected to the input terminal 122 is provided. The board electrical path section 22 is a part of the board 2 and is a portion where the wiring pattern 21 is provided. The plurality of accommodation sections 13 in the first embodiment are configured so that the board electrical path section 22 can be inserted therein.

[0022] Moreover, as an example, the accommodation portion 13 is formed in a cylindrical shape in a direction perpendicular to the housing panel 11. The cylindrical accommodation portion 13 is formed with an opening 231 (see FIG. 4 ) through which the fixing screw 14 for fixing the board 2 to the accommodation portion 13 can be inserted.

[0023] Next, the voltage input section 10 in a state where the board electrical wiring sections 22 are inserted into the respective housing sections 13 of the input panel 1 will be described with reference to FIG.

[0024] Fig. 2 is an exploded view showing the appearance of the board 2 constituting the voltage input unit 10. In Fig. 2, the housing panel 11 constituting the input panel 1, the cylindrical portion 121 of the connector 12, and the housing portion 13 are omitted, and only the input terminal 122 of the connector 12, the board electrical path portion 22 of the board 2, and the fixing screw 14 are shown.

[0025] As described above, the board 2 has six board electrical path portions 22 corresponding to the three voltage channels CH1 to CH3. For ease of explanation, in Fig. 2, the pair of board electrical path portions 22 for the first voltage channel CH1 of the voltage input section 10 shown in Fig. 1 are represented as board electrical path portions 22H and 22L, and the board electrical path portion 22 for the second voltage channel CH2 on the first voltage channel CH1 side is represented as board electrical path portion 22H. The board electrical path portions 22H and 22L are each formed linearly.

[0026] One end of the board electrical path portions 22H and 22L of the first voltage channel CH1 near the input terminal 122 is fixed to the base end of the input terminal 122 of the connector 12 by a fixing screw 14. The input terminal 122 is formed of a metal such as brass.

[0027] A positive potential is applied to the board electrical path portion 22H from the connection cord inserted into one of the connectors 12. A negative potential is applied to the board electrical path portion 22L from the connection cord inserted into the other connector 12.

[0028] A wiring pattern 21 is formed on each of the board electrical path portions 22H and 22L, and the board electrical path portions 22H and 22L are formed by gaps continuing from the edge of the board 2 between the adjacent wiring patterns 21.

[0029] The wiring pattern 21 is a path through which a voltage input via the input terminal 122 from the connection cord inserted into the connector 12 passes on the substrate 2. A resistor section 210 having one or more resistor elements soldered to the wiring pattern 21 is provided as an input resistor. The resistance value of the input resistor is designed to be, for example, several hundred kΩ to several tens of MΩ.

[0030] The resistance unit 210 of the first embodiment is configured with a plurality of series-connected resistance elements 211. In the example shown in Fig. 2, seven chip resistors with a resistance of several hundred kΩ are connected in series as the resistance elements 211, and the total resistance value of the resistance unit 210 is designed to be several MΩ.

[0031] In the wiring pattern 21, the wiring pattern connecting the adjacent resistor elements 211 is almost entirely built into the substrate 2. The pads or lands of the wiring pattern are exposed from the surface of the substrate 2 so that the resistor elements 211 can be soldered thereto.

[0032] Furthermore, one end of the board electrical path portion 22H of the second voltage channel CH2, which is closer to the input terminal 122, is fixed to the base end of the input terminal 122 of the connector 12 by a fixing screw 14. In the first embodiment, the gap width W2 of the board 2 between the board electrical path portion 22H of the second voltage channel CH2 and the board electrical path portion 22L of the first voltage channel CH1 is wider than the gap width W1 of the board 2 between the board electrical path portion 22H and the board electrical path portion 22L in the first voltage channel CH1.

[0033] In this way, by making the gap width W2 of the substrate 2 between the substrate electrical path sections 22H and 22L of adjacent voltage channels wider than the gap width W1 of the substrate 2 between adjacent substrate electrical path sections 22H and 22L in the same voltage channel, noise interference due to high voltage between voltage channels CH with different measurement systems can be suppressed.

[0034] Next, the connection structure between the input panel 1 and the board 2 into which the connection cord is inserted will be described with reference to FIG.

[0035] Fig. 3 is a cross-sectional view of the voltage input unit 10 taken along line III-III shown in Fig. 1. The cross section taken along line III-III is a plane that is parallel to the extension direction of the board electrical path portion 22 and perpendicular to the board 2.

[0036] 3, a resin portion 121A is formed in the cylindrical portion 121 to cover the outer periphery of the input terminal 122. An insertion hole 122A into which the base end of the connection cord is inserted is also formed in the input terminal 122. Furthermore, a polygonal portion 122B is formed on the tip side of the input terminal 122, which is located closer to the board electrical path portion 22 than the insertion hole 122A, to prevent the input terminal 122 itself from rotating.

[0037] Furthermore, a screw hole 15 corresponding to the fixing screw 14 is formed in the tip of the input terminal 122, which is located closer to the board electrical path section 22 than the polygonal section 122B, and an insertion hole 23 for the fixing screw 14 is also formed in one end of the board electrical path section 22 closer to the input terminal 122. The fixing screw 14 screws together one end of the board electrical path section 22 and the tip of the input terminal 122. In other words, the input terminal 122 is connected to the wiring pattern 21 at one end of the board electrical path section 22 closer to the input terminal 122.

[0038] The fixing screws 14 are made of a conductive metal. The input terminals 122 of the connectors 12 that constitute the input panel 1 are electrically connected to the wiring patterns 21 formed on the board electrical path portion 22 via the fixing screws 14.

[0039] In this way, the connection portion 30 between the input panel 1 and the board electrical path portion 22 fixes the board electrical path portion 22 to the housing portion 13 of the input panel 1, and has a screw fastening structure using the fixing screw 14, the insertion hole 23 of the board electrical path portion 22, and the screw hole 15 of the housing portion 13. The input terminal 122 and the board electrical path portion 22 are electrically connected by the connection portion 30 having the screw fastening structure.

[0040] The connection portion 30 serves to electrically connect the connection cord and the board electrical path portion 22, and in the first embodiment, is disposed closer to the input terminal 122 of the board electrical path portion 22.

[0041] Next, the shape of the housing portion 13 will be described with reference to FIG.

[0042] Fig. 4 is a cross-sectional view of the voltage input section 10 taken along line IV-IV shown in Fig. 1. The cross section taken along line IV-IV is a plane perpendicular to the direction in which the board electrical path section 22 extends.

[0043] As shown in FIG. 4, the housing portion 13 is formed hollow to house the board electrical wiring portion 22, and has an opening 231 through which the fixing screw 14 can be inserted.

[0044] The cross-sectional shape of the accommodation portion 13 in the first embodiment is rectangular. The portions of the wall portion 131 in the accommodation portion 13 located on both sides of the opening 231 are closer to the board electrical path portion 22 than the portions located on both sides of the board electrical path portion 22 so as to increase the creepage distance. The cross-sectional shape of the accommodation portion 13 may be formed into an arc shape, an ellipse shape, a polygonal shape, or the like instead of a rectangle.

[0045] In addition, the storage section 13 may be configured to be separable into two parts, an upper part and a lower part, and the lower storage section may be configured to store the board electrical path section 22 in the lower storage section, screw the board electrical path section 22 into place, and then combine the upper storage section with the lower storage section.

[0046] Next, the creepage distance and clearance distance of the voltage input section 10 will be described with reference to FIG.

[0047] 5 is an explanatory diagram showing the structure of the voltage input unit 10. Fig. 5(a) shows the external appearance of the voltage input unit 10, and Fig. 5(b) shows a cross section of the voltage input unit 10 taken along line V-V shown in Fig. 5(a). Fig. 5(b) also shows, by dashed lines and solid lines, the paths of the creepage distance and spatial distance between the resistive elements 211 arranged on adjacent wiring patterns 21 and arranged within the housing portion 13.

[0048] As an example, let us assume that the rated voltage to earth is 1500 VDC and 1000 VAC as specified by the CAT II overvoltage category. The required conditions for these rated voltages to earth are that the clearance distances for basic insulation (BI) and reinforced insulation (RI) are 8 mm and 16 mm, respectively, and the creepage distances for basic insulation (BI) and reinforced insulation (RI) are 15 mm and 30 mm, respectively.

[0049] 5B, the creepage distance between adjacent wiring patterns 21 inside the housing portion 13 is increased by the wall portion 131 of the housing portion 13. Therefore, compared to a case where the housing portion 13 is not provided, the above condition can be satisfied without widening the gap between the pair of wiring patterns or securing space for installing a partition.

[0050] 5B, the spatial distance between adjacent wiring patterns 21 inside the housing portion 13 is increased by the wall portion 131 of the housing portion 13. Therefore, compared to a case where the housing portion 13 is not provided, the above-mentioned conditions can be satisfied without widening the gap between the pair of wiring patterns or securing space for installing a partition.

[0051] The input voltage of the wiring pattern 21 outside the housing portion 13 is sufficiently reduced due to voltage drops caused by the multiple resistance elements 211 inside the housing portion 13. As a result, the conditions for the creepage distance and clearance distance between adjacent wiring patterns 21 outside the housing portion 13 are also relaxed. Therefore, the creepage distance and clearance distance between adjacent wiring patterns 21 outside the housing portion 13 can be configured to satisfy the conditions stipulated by the standard.

[0052] In this way, by arranging the board electrical path portion 22 having the wiring patterns 21 in the accommodation portion 13 of the input panel 1, it is possible to increase the creepage distance and spatial distance between the wiring patterns 21 compared to when there is no accommodation portion 13. Therefore, it is possible to shorten the distance D1 between the board electrical path portions 22 within the channel CH and the distance D2 between the channels CH.

[0053] As a specific example, the distance D1 between the board electrical path portions 22 in the channel CH can be reduced to about one-third compared to a general configuration in which the input panel 1 does not have the accommodation portion 13 and the board 2 does not have a gap for forming the board electrical path portion 22. Therefore, the size of the voltage input unit 10 can be reduced while satisfying international standards, etc.

[0054] Next, the effects of the first embodiment will be described.

[0055] In the first embodiment, the voltage input unit 10 includes a plurality of input terminals 122 to which conductor portions of a plurality of connection cords can be respectively connected, an input panel 1, a substrate 2, and a resistive element 211. The input panel 1 includes a plurality of hollow housing portions 13 for housing each input terminal 122 and a substrate electrical path portion 22, which is a portion of the substrate 2 on which a wiring pattern 21 connected to the input terminal 122 is formed. The substrate 2 has a gap between adjacent substrate electrical path portions 22, and the substrate electrical path portion 22 has a resistor portion 210 having a resistive element 211 disposed in the wiring pattern 21.

[0056] According to this configuration, a hollow housing 13 that houses input terminals 122 and board electrical path portions 22 having wiring patterns 21 is formed in input panel 1, and wall portions 131 of this hollow housing 13 are disposed in the gaps between adjacent board electrical path portions 22. This housing 13 not only houses input terminals 122 for connection to connection cords, but also serves to isolate wiring patterns 21 of adjacent board electrical path portions 22 formed on board 2. Therefore, compared to a case where housing 13 is not provided, the required values ​​for creepage distance and clearance distance required by the standard can be ensured without widening the gap between wiring patterns 21 or providing a separate partition between wiring patterns 21 of adjacent board electrical path portions 22.

[0057] Therefore, compared to conventional configurations in which the input panel 1 does not have a hollow storage section 13 to store the wiring pattern 21, the size of the voltage input section 10 can be made smaller while maintaining the creepage distance and spatial distance between the wiring patterns 21 of adjacent board electrical path sections 22.

[0058] Furthermore, the accommodation portion 13 of the first embodiment is configured so that a plurality of board electrical wiring portions 22 formed by gaps continuing from the end of the board 2 can be inserted therein.

[0059] According to this configuration, simply inserting the board 2 into the housing portion 13 of the input panel 1 forms wall portions 131 on both sides of the board electrical path portion 22. Therefore, with a simple operation, it is possible to achieve miniaturization of the voltage input portion 10 while ensuring the spatial distance between the wiring patterns 21.

[0060] In the first embodiment, the input terminal 122 is connected to the wiring pattern 21 near one end of the board electrical path portion 22 .

[0061] With this configuration, the connection cord and the wiring pattern 21 are electrically connected near one end of the board electrical path portion 22, so the length of the housing portion 13 can be made shorter than when the input terminal 122 is connected closer to the base end of the board electrical path portion 22. Therefore, the size of the voltage input portion 10 can be made smaller.

[0062] In the first embodiment, the board electrical path portion 22 is linear, and the resistance portion 210 has a plurality of resistance elements 211 connected in series by the wiring pattern 21 .

[0063] This configuration makes it possible to arrange a resistor section 210 that is inexpensive and highly accurate compared to when a resistor section 210 made up of a single resistive element is arranged.

[0064] For example, in a situation where a resistance unit 210 having an electrical resistance of several MΩ or more is required, an expensive resistance element would be required if a single resistance element 211 were used. In contrast, if a plurality of resistance elements 211 are used, it becomes possible to employ inexpensive, highly accurate resistance elements. Therefore, an inexpensive, highly accurate input resistor can be realized.

[0065] Furthermore, the accommodation portion 13 of the first embodiment accommodates only some of the multiple resistance elements 211 .

[0066] With this configuration, the voltage input to the connection cord drops via the multiple resistive elements 211 in the housing 13, so the creepage distance and spatial distance between adjacent wiring patterns 21 outside the housing 13 may satisfy predetermined standards. In such cases, by forming the housing 13 to accommodate only some of the multiple resistive elements 211, the length of the housing 13 can be made shorter than in a configuration in which all of the resistive elements 211 are accommodated in the housing 13. This makes it easier to insert the board electrical path portion 22 into the housing 13.

[0067] In the first embodiment, the input terminal 122 and the wiring pattern 21 of the board electrical path portion 22 are electrically connected by the screw structure of the connection portion 30 .

[0068] According to this configuration, the input panel 1 and the board electrical circuit section 22 of the board 2 are fastened together using a screw structure, so that the board 2 can be fixed to the input panel 1 without wobbling, and the occurrence of poor electrical contact can be suppressed.

[0069] Furthermore, the accommodating portion 13 of the first embodiment has an opening 231 through which the fixing screw 14 can be inserted.

[0070] According to this configuration, the fixing screws 14 can be passed through the openings 231 of the accommodation portion 13 when the plurality of board electrical path portions 22 formed by the gaps in the board 2 are inserted into the accommodation portion 13, so that the board electrical path portions 22 can be easily screwed into the accommodation portion 13. Therefore, the voltage input portion 10 can be easily manufactured.

[0071] Second Embodiment Next, an application example of the voltage input unit 10 according to a second embodiment will be described with reference to FIG.

[0072] FIG. 6 is a block diagram showing the configuration of a measuring device 100 including a voltage input section 10 according to the second embodiment.

[0073] The measuring device 100 is a device that calculates a physical quantity of an object to be measured based on the output signal of the voltage input unit 10. Examples of the physical quantity of the object to be measured include the output power or input power of a power conversion device such as a converter or inverter, and the temperature of the object to be measured.

[0074] For example, if the measuring device 100 is a device that calculates the temperature of the object to be measured, an output terminal (conductor portion) provided at the tip of a pair of harnesses or clip terminal output cables (connection cords) connected to multiple temperature measurement points is inserted into the connector 12 of each channel CH of the input panel 1 of the voltage input unit 10.

[0075] Alternatively, if the measuring device 100 is a device that calculates the input power or output power of a power conversion device, an output terminal (conductor portion) provided at the tip of an output cable (connection cord) having clip terminals connected to multiple voltage measurement points is inserted into the connector 12 of each channel CH of the input panel 1 of the voltage input unit 10.

[0076] The measuring device 100 includes a voltage input unit 50 having a voltage input section 10 and a calculation section 60 .

[0077] The voltage input unit 50 includes a voltage input section 10 and an AD conversion section 40. The AD conversion section 40 converts the output signal of the voltage input section 10 into a digital signal. The AD conversion section 40 outputs the converted digital signal to the calculation section 60.

[0078] The calculation unit 60 calculates the measurement quantity of the measurement object based on the output signal of the AD conversion unit 40. For example, the calculation unit 60 calculates the temperature of the measurement location using the output signal of the AD conversion unit 40. Alternatively, the calculation unit 60 calculates the input or output voltage value of the power conversion device using the output signal of the AD conversion unit 40.

[0079] Next, the effects of the second embodiment will be described.

[0080] The voltage input unit 50 and the measurement device 100 of the second embodiment include the voltage input section 10 of the first embodiment.

[0081] Therefore, the voltage input unit 50 and the measuring device 100 can achieve the same effects as those of the first embodiment. Therefore, the voltage input unit 50 and the measuring device 100 can reduce the size of the voltage input section 10 while satisfying the creepage distance and clearance distance conditions between the wiring patterns 21 defined based on the standard. Therefore, the voltage input unit 50 and the measuring device 100 themselves can be reduced in size.

[0082] Although the embodiments of the present invention have been described above, the above embodiments merely illustrate some of the application examples of the present invention, and it is not intended that the technical scope of the present invention be limited to the specific configurations of the above embodiments.

[0083] For example, the wiring pattern 21 in the above embodiment is not limited to being provided on the substrate, but may be provided within the substrate.

[0084] Furthermore, although the connection portion 30 in the above embodiment is disposed near one end of the board electrical path portion 22, it may be disposed near the other end or the middle of the board electrical path portion 22.

[0085] In addition, in the second embodiment, the voltage input section 10 and the AD conversion section 40 are arranged within the voltage input unit 50, but the voltage input section 10 and the AD conversion section 40 may be arranged within the housing of the measuring device 100 without being unitized.

[0086] This application claims priority based on Japanese Patent Application No. 2024-98231 filed with the Japan Patent Office on June 18, 2024, and also claims priority based on Japanese Patent Application No. 2025-91964 filed with the Japan Patent Office on June 2, 2025, the entire contents of which are incorporated herein by reference.

[0087] REFERENCE SIGNS LIST 10 Voltage input section 1 Input panel 2 Board 11 Housing panel 12, 12H, 12L Connector 121 Cylindrical section 122 Input terminal 13 Storage section 14 Fixing screw 21 Wiring pattern 22, 22H, 22L Board electrical path section 100 Unit 110 Measuring device 210 Resistance section 211 Resistance element 231 Opening

Claims

1. A voltage input unit comprising: a plurality of input terminals to which conductor portions of a plurality of connection cords can be respectively connected; an input panel; a substrate; and a resistive element, wherein the input panel includes, for each of the input terminals, a plurality of hollow accommodating portions that accommodate the input terminal and a substrate electrical path portion that is a portion of the substrate on which a wiring pattern connected to the input terminal is provided, the substrate has a gap between adjacent substrate electrical path portions, and the substrate electrical path portion has a resistive portion having the resistive element arranged in the wiring pattern.

2. A voltage input section according to claim 1, wherein the housing section is configured so that the board electrical wiring section can be inserted therein.

3. A voltage input section according to claim 1 or 2, wherein the input terminal is connected to the wiring pattern at one end of the substrate electrical path section that is closer to the input terminal.

4. A voltage input section according to claim 3, wherein the substrate wiring section is linear, and the resistance section has a plurality of resistance elements connected in series by the wiring pattern.

5. A voltage input section according to claim 4, wherein the accommodation section accommodates only some of the plurality of resistance elements.

6. A voltage input section according to any one of claims 1 to 5, wherein the input terminal and the wiring pattern of the board electrical path section are electrically connected by a screw structure.

7. A voltage input section according to claim 6, wherein the accommodating section has an opening through which a fixing screw can be inserted.

8. A voltage input unit comprising a voltage input section according to any one of claims 1 to 7.

9. A measuring device comprising a voltage input section according to any one of claims 1 to 7.

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