Voltage input section, voltage input unit, and measuring device

Abstract

To reduce the size of a voltage input part while securing a creepage distance and a spatial distance between wiring patterns in the voltage input part.SOLUTION: The voltage input part 10 includes a plurality of input terminals 122 to which conductor parts of a plurality of connection cords can be respectively connected, an input panel 1, a substrate 2, and a resistance element 211. The input panel 1 includes, for each input terminal 122, a plurality of hollow accommodation parts 13 that accommodate the input terminal 122 and a substrate electrical path part 22 provided with a wiring pattern 21 connected to the input terminal 122 in the substrate 2. The substrate 2 has a gap between the adjacent substrate electric path parts 22, and in the substrate electric path part 22, a resistance part 210 having a resistance element 211 is arranged in the wiring pattern 21.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Patent document 1 discloses a measurement module in which the 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. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-234990 Summary of the Invention [Problem to be solved by the invention]

[0004] 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.

[0005] 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.

[0006] 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.

[0007] 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. [Means for solving the problem]

[0008] 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. [Effects of the Invention]

[0009] 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.

[0010] Therefore, compared to conventional configurations in which the input panel does not have multiple hollow storage sections for accommodating board electrical circuit sections in which resistive elements are arranged on wiring patterns connected to input terminals, it is possible to accommodate not only the input terminals but also the board electrical circuit sections in which resistive elements are arranged in the storage sections, 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 securing the creepage distance and spatial distance between resistors on the wiring patterns of adjacent board electrical circuit sections. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a top view showing the appearance of a voltage input unit according to the first embodiment. [Figure 2] FIG. 2 is an exploded view showing the appearance of the board that constitutes the voltage input unit. [Figure 3] FIG. 3 is a cross-sectional view of the voltage input section taken along line III-III shown in FIG. [Figure 4] FIG. 4 is a cross-sectional view of the voltage input section taken along line IV-IV shown in FIG. [Figure 5] FIG. 5 is an explanatory diagram showing the structure of the voltage input unit. [Figure 6] FIG. 6 is a block diagram showing the configuration of a measurement device including a voltage input unit according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, various 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.

[0013] (First embodiment) The voltage input unit according to the first embodiment will be described with reference to FIGS.

[0014] FIG. 1 is a top view showing the appearance of a voltage input unit according to the first embodiment.

[0015] 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.

[0016] 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 substrate 2 has a plurality of wiring patterns 21 arranged side by side, and the wiring patterns 21 are each electrically connected to the input terminals 122 via fixing screws 14 (see FIG. 3).

[0017] A high voltage of, for example, several hundred volts to several thousand volts is input to input terminal 122. 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 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.

[0018] The input panel 1 is a panel for connecting connection cords (not shown) to the front of the input panel 1, which is the surface viewed from the left side of Fig. 1, to input voltage to a circuit board 2 inside the housing, and 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. In other words, the input panel 1 has connection ports for three voltage channels CH1 to CH3.

[0019] The connection cord has electric wires covered with an insulating coating, and conductor portions exposed at the distal and proximal ends. 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 of electric motors and high-voltage batteries. A banana plug is provided on the conductor portion at the proximal end of the connection cord. Note that the conductor portion at the proximal end of the connection cord does not need to be provided with a banana plug, as long as it can be electrically connected to the input terminal 122.

[0020] The input panel 1 includes a plate-shaped housing panel 11 that forms one side of the housing of a 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.

[0021] The connector 12 constitutes a part of the accommodating section 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 section 121A that covers the outer periphery of the input terminal 122. It is sufficient for the connector 12 that the input terminal 122 of the connector 12 can be electrically connected to a conductor section provided at the base end of the connection cord. The connector 12 does not have to protrude outward from the front surface of the housing panel 11, the resin section 121A may be omitted, and the shape of the connector 12 may be elliptical or polygonal. The connector 12 of the first embodiment includes a cylindrical section 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 section 121.

[0022] 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 a 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 multiple accommodation sections 13 of the first embodiment are configured so that the board electrical path section 22 can be inserted therein.

[0023] In addition, as an example, the storage section 13 is formed in a cylindrical shape in a direction perpendicular to the housing panel 11, and the cylindrical storage section 13 has an opening 231 (see Figure 4) through which a fixing screw 14 can be inserted to fix the substrate 2 to the storage section 13.

[0024] Next, the voltage input section 10 in a state in which 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.

[0025] 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 circuit portion 22 of the board 2, and the fixing screw 14 are shown.

[0026] As described above, the substrate 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 of 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 of 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.

[0027] 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 fixing screws 14. The input terminal 122 is made of metal such as brass.

[0028] A positive potential is applied to the board electrical path portion 22H from a connection cord inserted into one of the connectors 12, and a negative potential is applied to the board electrical path portion 22L from a connection cord inserted into the other connector 12.

[0029] 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.

[0030] The wiring pattern 21 is a path through which a voltage input from a connection cord inserted into the connector 12 via the input terminal 122 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.

[0031] The resistance unit 210 of the first embodiment is composed of a plurality of series-connected resistance elements 211. In the example shown in Fig. 2, seven chip resistors 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.

[0032] In the wiring pattern 21, the wiring pattern connecting adjacent resistive elements 211 is almost entirely built into the substrate 2, and in order to solder the resistive elements 211, the pads or lands of the wiring pattern are exposed from the surface of the substrate 2.

[0033] 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.

[0034] In this way, by making the gap width W2 of the substrate 2 between the substrate electrical path portions 22H and 22L of adjacent voltage channels wider than the gap width W1 of the substrate 2 between adjacent substrate electrical path portions 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.

[0035] 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.

[0036] 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.

[0037] 3, cylindrical portion 121 is formed with resin portion 121A that covers the outer periphery of input terminal 122. Input terminal 122 is also formed with insertion hole 122A into which the base end of a connection cord is inserted, and further, polygonal portion 122B is formed on the tip side of input terminal 122 that is located closer to board electrical path portion 22 than insertion hole 122A to prevent input terminal 122 itself from rotating.

[0038] 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 portion 22 than the polygonal portion 122B, and an insertion hole 23 for the fixing screw 14 is also formed in one end of the board electrical path portion 22 closer to the input terminal 122. The fixing screw 14 screws together one end of the board electrical path portion 22 and the tip of the input terminal 122. That is, the input terminal 122 is connected to the wiring pattern 21 at one end of the board electrical path portion 22 closer to the input terminal 122.

[0039] The fixing screw 14 is made of a conductive metal, and via this fixing screw 14, the input terminal 122 of the connector 12 that constitutes the input panel 1 is electrically connected to the wiring pattern 21 formed on the board electrical path section 22.

[0040] In this way, the connection portion 30 between the input panel 1 and the board electric path portion 22 fixes the board electric path portion 22 to the accommodation 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 electric path portion 22, and the screw hole 15 of the accommodation portion 13. The input terminal 122 and the board electric path portion 22 are electrically connected by the connection portion 30 having the screw fastening structure.

[0041] The connection portion 30 serves to electrically connect the connection cord and the board electrical path portion 22, and is arranged closer to the input terminal 122 of the board electrical path portion 22 in the first embodiment.

[0042] Next, the shape of the housing portion 13 will be described with reference to FIG.

[0043] 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.

[0044] 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.

[0045] The cross-sectional shape of the accommodating section 13 in the first embodiment is rectangular. The portions of the wall portion 131 in the accommodating section 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 accommodating section 13 may be arc-shaped, elliptical, polygonal, or the like instead of rectangular.

[0046] 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 part may be configured to store the board electrical path section 22 in the lower storage section, screw the board electrical path section 22 in place, and then combine the upper storage section with the lower storage section.

[0047] Next, the creepage distance and clearance distance of the voltage input section 10 will be described with reference to FIG.

[0048] Fig. 5 is an explanatory diagram showing the structure of the voltage input unit 10. Fig. 5(a) shows the appearance of the voltage input unit 10, and Fig. 5(b) shows a cross section of the voltage input unit 10 taken along line VV 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.

[0049] As an example, let's assume that the rated voltage to earth is 1500VDC, 1000VAC, as specified in 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 8mm and 16mm, respectively, and the creepage distances for basic insulation (BI) and reinforced insulation (RI) are 15mm and 30mm, respectively.

[0050] As shown by the dashed line in Figure 5(b), the creeping distance between adjacent wiring patterns 21 within the accommodating section 13 is longer due to the wall 131 of the accommodating section 13, so compared to when the accommodating section 13 is not present, the above conditions can be met without widening the gap between the pair of wiring patterns or reserving space for installing a partition.

[0051] Furthermore, as shown by the solid line in Figure 5(b), the spatial distance between adjacent wiring patterns 21 within the storage section 13 is longer due to the wall portion 131 of the storage section 13, so compared to when the storage section 13 is not present, the above conditions can be met without widening the gap between the pair of wiring patterns or reserving space for installing a partition.

[0052] 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, so that the creepage distance and clearance distance between adjacent wiring patterns 21 outside the housing portion 13 can also be configured to satisfy the conditions stipulated by the standard.

[0053] 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.

[0054] 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.

[0055] Next, the effects of the first embodiment will be described.

[0056] 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 of the input terminals 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 arranged in the wiring pattern 21.

[0057] 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 a connection cord, but also serves to separate 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.

[0058] Therefore, compared to conventional configurations in which the input panel 1 does not have a hollow storage section 13 for storing the wiring pattern 21, the size of the voltage input section 10 can be made smaller while ensuring the creepage distance and spatial distance between the wiring patterns 21 of adjacent board electrical path sections 22.

[0059] Furthermore, the accommodating 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.

[0060] 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.

[0061] 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 .

[0062] With this configuration, the connection cord and 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.

[0063] 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.

[0064] 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.

[0065] For example, in a situation where a resistance section 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.

[0066] Furthermore, the accommodating portion 13 of the first embodiment accommodates only some of the plurality of resistive elements 211 .

[0067] 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.

[0068] 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.

[0069] 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.

[0070] Moreover, the accommodating portion 13 of the first embodiment has an opening 231 through which the fixing screw 14 can be inserted.

[0071] According to this configuration, fixing screws 14 can be passed through openings 231 of housing 13 when multiple board electrical path sections 22 formed by gaps in board 2 are inserted into housing section 13, so board electrical path sections 22 can be easily screwed to housing section 13. Therefore, voltage input section 10 can be easily manufactured.

[0072] Second Embodiment Next, an application example of the voltage input unit 10 according to the second embodiment will be described.

[0073] FIG. 6 is a block diagram showing the configuration of a measurement device 100 including a voltage input section 10 according to the second embodiment.

[0074] 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 an 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.

[0075] 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.

[0076] 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.

[0077] The measuring device 100 includes a voltage input unit 50 having a voltage input section 10 and a calculation section 60 .

[0078] 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 a calculation section 60.

[0079] 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.

[0080] Next, the effects of the second embodiment will be described.

[0081] The voltage input unit 50 and the measurement device 100 of the second embodiment include the voltage input section 10 of the first embodiment.

[0082] 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 conditions for creepage distance and spatial distance between wiring patterns 21 defined based on the standard, and therefore the voltage input unit 50 and the measuring device 100 themselves can be made smaller.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] Furthermore, 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. [Explanation of symbols]

[0087] 10 Voltage input section 1 Input Panel 2 boards 11. Housing panel 12, 12H, 12L Connectors 121 Cylindrical part 122 input terminal 13 Storage section 14 Fixing screws 21 Wiring Pattern 22, 22H, 22L board circuit section 100 units 110 Measuring equipment 210 Resistance section 211 Resistor element 231 Aperture

Claims

1. a plurality of input terminals to which conductor portions of a plurality of connection cords can be respectively connected; The input panel and A substrate; 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, for each of the input terminals; the substrate has a gap between adjacent substrate wiring portions, The substrate wiring section has a resistor section including the resistor element disposed in the wiring pattern. Voltage input section.

2. 2. The voltage input unit according to claim 1, The housing portion is configured so that the board electrical path portion can be inserted therein. Voltage input section.

3. 2. The voltage input unit according to claim 1, the input terminal is connected to the wiring pattern at one end of the substrate electrical path portion closer to the input terminal; Voltage input section.

4. 4. The voltage input unit according to claim 3, The substrate wiring portion is linear, the resistor section has a plurality of resistor elements connected in series by the wiring pattern; Voltage input section.

5. 5. The voltage input unit according to claim 4, the accommodating portion accommodates only some of the plurality of resistive elements; Voltage input section.

6. 2. The voltage input unit according to claim 1, The input terminal and the wiring pattern of the substrate electrical path portion are electrically connected by a screw structure. Voltage input section.

7. 7. The voltage input unit according to claim 6, The accommodating portion has an opening through which a fixing screw can be inserted. Voltage input section.

8. A voltage input unit comprising the voltage input section according to claim 1.

9. A measuring device comprising the voltage input section according to claim 1.

Images