JP2013213693A - Measurement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measurement device, with a comparator function for displaying an assessment result of a comparison between a measured value acquired using test leads and a reference value, which allows a user to easily recognize the assessment result without turning eyes too much away from a measurement point.SOLUTION: A measurement device 100 includes: a device body 1, to which a pair of test leads 5 are connected, having a measurement section 7a for obtaining a measured value on the basis of an input signal acquired through the test leads 5, a comparison section 7b for comparing the measured value obtained by the measurement section 7a with a reference value, and a measured value display section 2 for displaying the measured value; and an assessment result display unit 10 which has an assessment result display section 11 which displays a result of comparison made by the comparison section 7b and can be permanently or removably mounted on each of the test leads 5.

Description

  The present invention relates to a measuring apparatus having a comparator function for displaying a determination result obtained by comparing a measured value obtained using a test lead and a reference value, and more specifically, displaying a determination result in the measuring apparatus main body. In addition to or in place of it, the present invention relates to a measuring apparatus that enables display of determination results at hand.

  Conventionally, as measuring devices such as LCR meters, ohmmeters, and digital multimeters (DMMs), measurement purposes (voltage, current, resistance, static, etc.) related to the measurement object (electrical element to be measured, circuit to be measured, electric device to be measured) Some have a comparator function that compares a measured value (such as electric capacity) with a reference value, and displays a determination result by the comparison on a determination result display unit provided in the apparatus body (Patent Document 1).

  For example, as shown in FIG. 8A, in a measuring apparatus 200 that is an ohmmeter, test leads 205 (205 a and 205 b) are connected to the apparatus main body 201. As shown in FIG. 8B, the test lead 205 includes a contact 251 that is brought into contact with the object S to be measured, and a lead 252 that connects the contact 251 to the apparatus main body 201. Then, as shown in FIG. 8A, the apparatus main body 201 compares the measured value with the measured value display unit 202 for displaying the measured value (in this example, the electric resistance value), and the reference value with the comparator function. And a determination result display unit 203 for displaying the determination result obtained in this manner. The determination result display unit 203 includes lamps 203a, 203b, and 203c provided in association with the notation “HI”, “IN”, or “Lo (or Low)”, respectively. When the measured value exceeds the upper limit value as the reference value, “HI”, “Lo” when the measured value is less than the lower limit value, and “IN” lamp is lit when the measured value is equal to or higher than the lower limit value and lower than the upper limit value.

  According to this, the measured value itself is simply displayed on the measured value display section, and the measurer determines whether the measured value exceeds the upper limit value, whether the measured value is less than the lower limit value, or the lower limit value. Compared with the case where it is necessary to determine whether or not the value is equal to or higher than the upper limit value, the measurer can immediately recognize the determination result, so that the quality of the specific parameter of the measured object can be clearly and quickly determined. Judgment is possible.

Japanese Patent Laid-Open No. 3-137575

  However, the above conventional technique has the following problems to be improved.

  For example, the measurement apparatus 200 shown in FIG. 8 will be described. When such a measurement apparatus 200 is a so-called stationary type (bench type), the apparatus main body 201 is arranged at a specific location, and the test leads 205 are arranged. (205a, 205b) is used to measure the measurement object related to the measurement object S arranged at a position away from the apparatus main body 201.

  Here, conventionally, lamps 203a, 203b, 203c of the determination result display unit 203 are provided around the measurement value display unit 202 in the apparatus main body 201, and the determination result is displayed by turning on / off the lamp. In this case, at the time of measurement using the comparator function, a signal is sent to the apparatus main body 201 via the test lead 205 by bringing the contact 251 of the test lead 205 into contact with the measurement location of the object S to be measured and starting the measurement. Entered. In the apparatus main body 201, a measured value is obtained from the input signal, and the measured value is displayed on the measured value display unit 202. Also, the measured value and the reference value (upper limit value / lower limit value) are compared, and the determination result by the comparison is displayed by turning on / off the lamps 203a, 203b, 203c of the determination result display unit 203. Therefore, the measured value (numerical value) and the determination result (HI, IN, Lo) can be viewed simultaneously.

  However, in such a measuring apparatus 200, when the measured object S and the apparatus main body 201 are in a separated positional relationship, the contact 251 of the test lead 205 is used to measure the measured position of the measured object S in order to see the determination result. It is necessary to shift the eyes to the determination result display unit 203 of the apparatus main body 201 while hitting it. Therefore, there are problems that it takes time to confirm the determination result, and it is difficult to continuously measure a large number of objects to be measured S. In some cases, the contact 251 of the test lead 205 may be mistakenly separated from the measurement location of the object to be measured S while viewing the determination display section 203 of the apparatus main body 201, or an undesired location (for example, There is a possibility that the judgment will be wrong.

  Such a problem is likely to be conspicuous in a stationary measurement apparatus in which the determination result display unit as described above is provided in the apparatus main body. However, the same problem may occur even when a portable measuring device is used for measurement when the device main body is placed at a specific location.

  Accordingly, an object of the present invention is to provide a measuring apparatus having a comparator function for displaying a determination result obtained by comparing a measured value obtained by using a test lead and a reference value, without requiring the measurer to largely remove his / her line of sight from the measurement location. It is an object of the present invention to provide a measuring apparatus that can easily recognize a determination result.

  The above object is achieved by the measuring apparatus according to the present invention. In summary, the present invention is an apparatus main body to which a test lead is connected, a measurement unit for obtaining a measurement value based on a signal input via the test lead, and a measurement value obtained by the measurement unit An apparatus main body including a comparison unit that compares the measured value with a reference value; a determination result display unit that displays a result of comparison by the comparison unit; and the test lead A determination result display device that is fixedly attached to or detachably attached to the measuring device.

  According to the present invention, in a measuring apparatus having a comparator function for displaying a determination result obtained by comparing a measurement value obtained using a test lead and a reference value, the determination result is obtained without the need for the measurer to largely remove the line of sight from the measurement location. Can be easily recognized.

1 is a schematic external view showing an overall configuration of a measuring apparatus according to an embodiment of the present invention. It is a general | schematic functional block diagram of the principal part of the measuring apparatus which concerns on one Example of this invention. It is (a) front view of the test lead provided with the determination result display apparatus in the measuring device concerning one example of the present invention, and (b) is a schematic internal configuration figure. (A) External appearance perspective view of the determination result display apparatus in the measuring apparatus which concerns on the other Example of this invention, (b) The external appearance perspective view which shows the state which attached the determination result display apparatus to the test lead. It is a schematic diagram for demonstrating the procedure of mounting | wearing the test lead with the determination result display apparatus in the measuring apparatus which concerns on the other Example of this invention. (A) External appearance perspective view of the determination result display apparatus in the measuring device based on the further another Example of this invention, (b) The external appearance perspective view which shows the state which attached the determination result display apparatus to the test lead. It is a schematic diagram for demonstrating the procedure of mounting | wearing the test lead with the determination result display apparatus in the measuring apparatus which concerns on the further another Example of this invention. It is a typical external view showing the whole structure of an example of the conventional measuring device, and (b) is a schematic internal block diagram of a test lead in the measuring device.

  Hereinafter, the measuring apparatus according to the present invention will be described in more detail with reference to the drawings.

Example 1
FIG. 1 is a schematic external view showing the overall configuration of a measuring apparatus 100 according to an embodiment of the present invention. FIG. 2 is a schematic functional block diagram of the main part of the measuring apparatus 100 of the present embodiment. In the present embodiment, the measuring apparatus 100 is an ohmmeter having a comparator function.

  The measuring apparatus 100 has an apparatus body 1. The apparatus main body 1 is provided with a measurement circuit 6, a control circuit 7, an operation unit 4, a display device 20, a measurement terminal 8, and the like.

  The measurement circuit 6 is configured to be able to measure electrical resistance as a measurement purpose (parameter). The measurement circuit 6 includes a measurement voltage generation unit that applies a predetermined voltage to a measurement location of the measurement object S, a current detection unit that detects a current flowing through the measurement object S when the predetermined voltage is applied, And an A / D converter that converts the voltage applied by the measurement voltage generator when the predetermined voltage is applied and the current detected by the current detector into digital data at predetermined sampling intervals.

  The control circuit 7 comprehensively controls the operation of each unit of the measurement apparatus 100. The control circuit 7 includes a CPU as a calculation control unit, and a memory (ROM, RAM) as a storage unit built in or connected to the CPU. The CPU controls each unit of the measuring apparatus 100 according to programs and data stored in the memory. The control circuit 7 calculates a measured value of the electrical resistance of the device under test S based on voltage data and current data from the A / D converter of the measuring circuit 6 as a signal input via the test lead 5. . Thus, the control circuit 7 has a function as the measurement unit 7a. In addition, the control circuit 7 compares the measured value of the electrical resistance with a preset reference value, and obtains a determination result that is a comparison result. Thus, the control circuit 7 has a function as the comparison unit 7b.

  The operation unit 4 includes a power switch, a setting switch for inputting signals relating to various settings to the control circuit 7, and the like. In this embodiment, in particular, the operation unit 4 is provided with a comparator function switch 41 for turning on / off the comparator function and a reference value setting switch 42 for setting a reference value in the comparator function. When the comparator function switch 41 is pressed while the comparator function is OFF, the control circuit 7 turns on the comparator function. If the comparator function switch 41 is pressed while the comparator function is ON, the control circuit 7 turns the comparator function OFF. The reference value setting switch 42 includes a plurality of switches in this embodiment, and can set an upper limit value and a lower limit value. The upper limit value and the lower limit value set by the reference value setting switch 42 are stored in the memory of the control circuit 7.

  The display device 20 includes a measurement value display unit 2 and a main body side determination result display unit 3. In this embodiment, the measurement value display unit 2 is a count LED display panel that performs digital display by selectively illuminating a plurality of display segments with LEDs. However, it is not limited to this, As the measured value display part 2, you may use a liquid crystal display panel etc., for example. The measured value display unit 2 displays the measured value 2 a of the electrical resistance according to the signal from the control circuit 6. In the present embodiment, the measurement value display unit 2 displays a reference value (upper limit / lower limit) 2b in the comparator function. When the reference value setting switch 42 is operated, the control circuit 7 changes the display of the reference value on the measured value display unit 2 accordingly. The measurer can set the reference value by operating the reference value setting switch 42 while viewing the display on the measurement value display unit 2. On the other hand, the main body side determination result display unit 3 includes lamps 3a, 3b, and 3c provided in association with the notations “HI”, “IN”, and “Lo”, respectively. When the measured value of electrical resistance exceeds the upper limit value as the reference value, “HI”, “Lo” when the measured value is less than the lower limit value, and “IN” lamp is lit when the measured value is lower than the lower limit value and lower than the upper limit value. To do. In the present embodiment, the light sources of the lamps 3a, 3b, and 3c of the main body side determination result display unit 3 are LEDs.

  The apparatus main body 1 is provided with a pair of measurement terminals 8 (8a, 8b). One test lead (ground side) 5a of the pair of test leads 5 (5a, 5b) is detachably connected to one measurement terminal (ground side) 8a. The other test lead (line side) 5b is detachably connected to the other measurement terminal (line side) 8b. The test lead 5 is connected to the measurement circuit 6 via the measurement terminal 8.

  In this embodiment, the measuring apparatus 100 further includes a determination result display device 10 for displaying a determination result that is a result of the comparison unit 7b comparing the measured value of the electrical resistance with the reference value. In the present embodiment, the determination result display device 10 is fixedly provided on one test lead 5b of the pair of test leads 5 (5a, 5b). That is, in the present embodiment, the determination result display device 10 is integrated with one test lead 5b. In this embodiment, the determination result display device 10 is provided as the one test lead 5 on the line-side test lead 5b. However, the determination result display device 10 is not limited to this and is provided on the ground-side test lead 5a. It may be.

  In the present embodiment, the determination result display device 10 includes lamps 11a, 11b, and 11c that are provided in association with the notations “HI”, “IN”, and “Lo”, respectively. 11. When the measured value of electrical resistance exceeds the upper limit value as the reference value, “HI”, “Lo” when the measured value is less than the lower limit value, and “IN” lamp is lit when the measured value is lower than the lower limit value and lower than the upper limit value. To do. In the present embodiment, the light sources of the lamps 11a, 11b, and 11c of the determination result display unit 11 of the determination result display device 10 are LEDs.

  More specifically, FIG. 3A is a front view of the test lead 5b provided with the determination result display device 10, and FIG. 3B is a schematic internal configuration diagram thereof. The test lead 5b includes a contact 51 that is brought into contact with the object to be measured S, a test lead body 52 that holds the contact 51, a lead wire 53 that connects the contact 51 to the apparatus body 1, and a determination result display unit 11. And a communication line 13 as a connection means for connecting the apparatus main body 1 to each other so as to communicate with each other.

  The test lead main body 52 is a columnar body (substantially cylindrical body in this embodiment) having an axis, and a contact 51 is provided so as to protrude from one end portion thereof, and a lead is provided at the other end portion. A cable 54 that includes the line 53 and the communication line 13 is connected.

  The determination result display unit 11 is visible from the outside of the test lead main body 52, and includes lamps 11a, 11b, and 11c as illumination means that are turned on or off according to the comparison result by the comparison unit 7b. The lamps 11a, 11b, and 11c can be visually confirmed on the outer surface 52a adjacent to the notations “HI”, “IN”, and “Lo” printed on the outer surface 52a of the test lead body 52, respectively. It is fixed on the substrate 12 arranged inside the lead body 52. One end of the communication line 13 is connected to the substrate 12, and the other end is connected to the communication terminal (external control terminal) 9 of the apparatus main body 1. In the present embodiment, the lead wire 53 and the communication wire 13 are covered with an electrically insulating coating material and grouped as one cable 54. A plug (not shown) is formed at the end of the cable 54 so that the lead wire 53 and the communication line 13 can be connected to the measurement terminal 5b and the communication terminal 9, respectively.

  In the present embodiment, the determination result display device 10 can be attached to and detached from the device main body 1 integrally with the test lead 5 through the plug. However, the present invention is not limited to this, and the test lead 5 and the determination result display device 10 may be fixedly connected to the device main body 1 via the cable 54.

  Next, an example of a measurement procedure using the comparator function by the measurement apparatus 100 of the present embodiment will be described. To use the comparator function, the comparator function switch 41 is pressed in the operation unit 4 of the apparatus body 1 to turn on the comparator function, and the reference value setting switch 42 is operated to set the desired reference value (upper limit value / lower limit value). Is displayed on the measured value display unit 2 of the apparatus body 1 to set the reference value. Thereafter, the pair of test leads 5 (5a, 5b) is brought into contact with the measurement location of the object S to be measured. At this time, the measurement may be started immediately after the circuit is connected, or a switch for starting the measurement may be provided separately. For example, when the test lead 5 is a test lead 5 capable of four-terminal measurement, the voltage-side tip provided so as to protrude in the axial direction at the tip of the contact 51 is connected to a predetermined portion of the object S to be measured. To the inside of the current side tip disposed concentrically on the outside. Then, measurement is started when both the current side and the voltage side are conducted. As a result, a signal corresponding to the electrical resistance value of the device under test S is input to the measurement circuit 6 of the apparatus body 1 via the test lead 5. The measurement circuit 6 converts the input signal into digital data corresponding to the electrical resistance of the device under test S. Further, the control circuit 7 calculates a measured value of the electrical resistance of the object S to be measured based on the digital data input from the measurement circuit 6. Then, the control circuit 7 displays the calculated measured value of the electrical resistance of the measured object S on the measured value display unit 2 of the apparatus body 1. Further, the control circuit 7 compares the measured value of electric resistance with preset reference values (upper limit value / lower limit value). Then, the control circuit 7 determines a signal for turning on / off the lamps 3a, 3b, 3c of the main body side determination result display unit 3 of the apparatus main body 1 as a signal related to the determination result according to the comparison result. It transmits to the result display part 3. At the same time, the control circuit 7 determines a signal for turning on / off the lamps 11a, 11b, and 11c of the determination result display unit 11 of the determination result display device 10 as a signal related to the determination result according to the comparison result. Transmit to the display device 10. Thereby, in addition to the main body determination result display part 3 of the apparatus main body 1, the determination result is displayed on the determination result display part 11 on the test lead 5b which is a measurer's hand.

  Note that the determination result display unit 11 and the main body side determination result display unit 3 of the determination result display device 10 are not limited to the mode of displaying the determination result in “HI”, “IN”, and “Lo”. Thus, by displaying each of the three states that the measured value is a value exceeding the upper limit value, a value less than the lower limit value, or a value not less than the lower limit value and not more than the upper limit value, It becomes easier to make a clear and quick determination regarding whether or not a specific parameter of the measurement object S is acceptable. However, for example, only when the measured value exceeds the upper limit value and / or less than the lower limit value, that is, when the measured value is outside the predetermined acceptable range (non-standard), the determination result in the sense of warning. May be displayed. Conversely, if the measured value is greater than or equal to the lower limit value and less than or equal to the upper limit value, that is, only when the measured value is within the predetermined acceptable range (within the standard), the determination result is displayed in the meaning of the acceptable determination. Good. Furthermore, you may make it display two states of being in a pass range and being out of a pass range, respectively. For example, a lamp provided in association with a notation such as “PASS” or “OK” is lit to indicate that it is within the acceptable range, and “FAIL”, “NG”, or the like is indicated if it is outside the acceptable range. A lamp provided in association with the notation can be turned on for display. As described above, the determination result display device 10 indicates that, as a result of comparison by the comparison unit 7b, the measured value is a value exceeding the upper limit value as the reference time, a value less than the lower limit value, At least one of the values not exceeding the upper limit value can be displayed.

  Further, in this embodiment, the determination result display unit 11 and the main body side determination result display unit 3 of the determination result display device 10 are configured to have lamps associated with the notation “HI, IN, Lo”. It was supposed to be. Thereby, it is possible to recognize the determination result clearly and quickly with a relatively simple configuration, and there is an advantage that manufacture is easy at a relatively low cost. However, the present invention does not limit the display method of the determination result itself, and for example, a display having the same meaning as the above aspects can be performed on a display panel such as a liquid crystal display panel.

  As described above, according to the present embodiment, the measurer can easily recognize the determination result at a location close to the object to be measured without having to largely remove the line of sight from the measurement location. Therefore, the determination result can be confirmed in a short time. Moreover, it is suitable for measuring a large number of objects to be measured continuously.

Example 2
Next, another embodiment of the present invention will be described. In the measuring apparatus of the present embodiment, the same or corresponding elements as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the first embodiment, the determination result display device 10 is fixedly provided on one test lead 5b of the pair of test leads 5 (5a, 5b).

  On the other hand, in the present embodiment, the determination result display device 10 is configured to be detachably attached to the test lead 5. In this embodiment, the determination result display device 10 is described as being attached to the test lead 5b on the line side as one test lead 5. However, the determination result display device 10 is not limited to this and is attached to the test lead 5a on the ground side. May be.

  FIG. 4A is an external perspective view of the determination result display device 10 in the present embodiment, and FIG. 4B is an external perspective view showing a state in which the determination result display device 10 in the present embodiment is attached to the test lead 5b. It is.

  The determination result display device 10 includes a display device main body 14 that houses the determination result display unit 11, a mounting ring 15 as a fixing means that detachably fixes the display device main body 14 to the test lead 5b, and a determination result display unit 11. And a communication line 13 as connection means for connecting the apparatus main body 1 to be communicable.

  In the present embodiment, the display device main body 14 has a substantially rectangular box shape (box shape) in any cross section along two substantially orthogonal planes. Of the side surfaces of the display device main body 14 extending along the axial direction of the test lead 5b with the determination result display device 10 attached to the test lead 5b, the side surface facing the opposite side of the test lead 5b is the first side. The side surface 14a and the side surface opposite to the first side surface 14a are defined as a second side surface 14b. Further, of the side surface of the display device main body 14 extending in a direction substantially orthogonal to the axial direction of the test lead 5b with the determination result display device 10 attached to the test lead 5b, the end of the test lead 5b on the contact 51 side. A side surface facing away from the part is defined as a third side surface 14c. At this time, the determination result display unit 11 is provided to display the determination result on the first side surface 14a. The mounting ring 15 is provided on the second side surface 14b. A cable 16 that includes the communication line 13 is connected to the third side surface 14c.

  In the present embodiment, the determination result display unit 11 is visible from the outside of the first side surface 14a of the display device main body 14, and the lamp 11a as an illuminating unit that is turned on or off according to the comparison result by the comparison unit 7b. , 11b, 11c. In the present embodiment, the light sources of the lamps 11a, 11b, and 11c of the determination result display unit 11 of the determination result display device 10 are LEDs. The lamps 11a, 11b, and 11c are visible on the first side surface 14a adjacent to the notations “HI”, “IN”, and “Lo” printed on the first side surface 14a of the display device body 14, respectively. Thus, it is fixed on a substrate (not shown) disposed inside the display device main body 14. One end of the communication line 13 is connected to the substrate, and the other end is connected to the communication terminal 9 (see FIG. 2) of the apparatus body 1. In this embodiment, the communication line 13 is covered with an electrically insulating covering material to form a cable 16, and the communication line 13 can be connected to the communication terminal 9 (see FIG. 2) at the end of the cable 16. A plug (not shown) is formed.

  In this embodiment, the determination result display device 10 is detachable from the device main body 1 through the plug. However, the present invention is not limited to this, and the determination result display device 10 may be fixedly connected to the device main body 1 via the cable 16. In this case, the determination result display device 10 can be used by being attached to the test lead 5 that is fixedly or detachably connected to the device main body 1 via the cable 54 as necessary.

  The mounting ring 15 engages with the outer surface 52a of the test lead body 52 so as to surround the axis of the test lead 5b. In the present embodiment, the mounting rings 15 are provided at two locations in the axial direction of the test lead 5 b on the second side surface 14 b of the display device main body 14. In particular, in the present embodiment, the mounting ring 15 is a partially cut-out annular member (in this embodiment, abbreviated in the present embodiment) in which an opening 15b is formed on a part of the display device body 14 opposite to the second side surface 14b. An annular member). The diameter of the inner periphery (virtual circle) of the ring portion 15a of the mounting ring 15 is equal to or slightly smaller than the outer diameter of the mounting portion of the determination result display device 10 in the test lead 5b. In the mounting ring 15, the ring portions 15a on both sides of the opening portion 15b can be elastically deformed along a plane substantially orthogonal to the axis of the test lead 5b. In the present embodiment, the display device body 14 and the mounting ring 15 are integrally formed of a plastic material.

  5A and 5B show the procedure for mounting the determination result display device 10 of this embodiment on the test lead 5b along the axial direction of the test lead 5b. 5A, the opening 15b of the mounting ring 15 is directed toward the outer surface 52a of the test lead main body 52, and the determination result display device 10 is brought close to the test lead 5b. And the front-end | tip of the ring part 15a which opposes on both sides of the opening part 15b is made to contact the outer surface 52a of the test lead main body 52, and also the determination result display apparatus 10 is pressed toward the test lead 5b. As a result, the ring portion 15a is deformed along a plane substantially orthogonal to the axial direction of the test lead 5b so that the opening 15b of the mounting ring 15 becomes wider. Thereafter, when the tip of the ring portion 15a of the mounting ring 15 exceeds the maximum diameter position of the test lead 5b, the ring portion 15a is substantially orthogonal to the axial direction of the test lead 5b so that the opening 15b is narrowed by its elastic restoring force. Deforms along the surface. Then, as shown in FIG. 5B, the ring portion 15 a of the mounting ring 15 is connected to the test lead main body 52 in a state where the second side surface 14 b of the display device main body 14 is adjacent to the outer side surface 52 a of the test lead main body 52. The outer surface 52 a is sandwiched with an appropriate force, and the mounting ring 15 is engaged with the outer surface 52 a of the test lead body 52.

  The procedure for removing the determination result display device 10 from the test lead 5b is roughly the reverse of the procedure for mounting. That is, by pulling the determination result display device 10 away from the test lead 5b, the mounting ring 15 is deformed to disengage from the test lead body 52, and the determination result display device 10 is removed from the test lead 5b. be able to.

  As described above, the same effects as those of the first embodiment can be obtained by the configuration of the present embodiment. Further, according to the present embodiment, since the determination result display device 10 is configured separately from the test lead 5, the determination result display device 10 is attached to the test lead 10 as necessary, and the determination result is obtained at hand. It can be easily confirmed. Therefore, the test result display device 10 can be configured as an optional device that adds a function for easily confirming the determination result at hand as desired, while the test lead 5 itself has a low-cost and simple configuration. Further, according to the present embodiment, the determination result display device 10 can be attached to the test lead 5b by a simple operation such as elastically deforming the elastically deformable attachment ring 15 as a fixing means to the test lead 5b. can do.

Example 3
Next, another embodiment of the present invention will be described. In the measuring apparatus of the present embodiment, the same or corresponding elements as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the present embodiment, as in the second embodiment, the determination result display device 10 is configured to be detachably attached to the test lead 5. In this embodiment, the determination result display device 10 is described as being attached to the test lead 5b on the line side as one test lead 5. However, the determination result display device 10 is not limited to this and is attached to the test lead 5a on the ground side. May be.

  6A is an external perspective view of the determination result display device 10 according to the present embodiment, and FIG. 6B is an external perspective view illustrating a state where the determination result display device 10 according to the present embodiment is attached to the test lead 5b. It is.

  The determination result display device 10 includes a display device main body 14 that accommodates the determination result display unit 11, a mounting sheet 17 as a fixing unit that removably fixes the display device main body 14 to the test lead 5b, and a determination result display unit 11. And a communication line 13 as connection means for connecting the apparatus main body 1 to be communicable.

  In the present embodiment, the display device main body 14 has a substantially rectangular card shape (or sheet shape) in any cross section along two substantially orthogonal planes. Of the side surfaces of the display device main body 14 extending along the axial direction of the test lead 5b with the determination result display device 10 attached to the test lead 5b, the side surface facing the opposite side of the test lead 5b is the first side. Let it be the side surface 14a. At this time, the determination result display unit 11 is provided to display the determination result on the first side surface 14a. The display device main body 14 has a surface opposite to the first side surface 14 b fixed to the surface 17 a of the mounting sheet 17. In addition, the cable 16 that encloses the communication line 13 is displayed so that the determination result display device 10 is attached to the test lead 5b and extends toward the side opposite to the end of the test lead 5b on the contact 51 side. It is connected to the apparatus main body 14.

  In the present embodiment, the determination result display unit 11 is visible from the outside of the first side surface 14a of the display device main body 14, and the lamp 11a as an illuminating unit that is turned on or off according to the comparison result by the comparison unit 7b. , 11b, 11c. In the present embodiment, the light sources of the lamps 11a, 11b, and 11c of the determination result display unit 11 of the determination result display device 10 are LEDs. The lamps 11a, 11b, and 11c are visible on the first side surface 14a adjacent to the notations “HI”, “IN”, and “Lo” printed on the first side surface 14a of the display device body 14, respectively. Thus, it is fixed on a substrate (not shown) disposed inside the display device main body 14. In this embodiment, this substrate is preferably a flexible substrate. One end of the communication line 13 is connected to the substrate, and the other end is connected to the communication terminal 9 (see FIG. 2) of the apparatus body 1. In this embodiment, the communication line 13 is covered with an electrically insulating coating material to form a cable 16, and the communication line 13 can be connected to the communication terminal 9 (see FIG. 2) at the end of the cable 16. A plug (not shown) is formed.

  The mounting sheet 17 engages with the outer surface 52a of the test lead body 52 so as to surround the axis of the test lead 5b. In particular, in the present embodiment, the mounting sheet 17 is a sheet-like member wound around the test lead main body 52 in a strip shape that is long in one direction. The display device main body 14 is fixed to the surface 17 a of the mounting sheet 17 adjacent to one end in the longitudinal direction of the mounting sheet 17. A hook-and-loop fastener (for example, male) 17c1 is fixed to the surface 17a of the mounting sheet 17 as a fixing portion adjacent to the other end portion in the longitudinal direction of the mounting sheet 17. Furthermore, in this embodiment, a hook-and-loop fastener (for example, female) 17c2 is fixed as a fixing portion to the back surface 17b of the mounting sheet 17 adjacent to the end of the mounting sheet 17 on the side where the display device main body 14 is provided. Yes. In the present embodiment, the length of the mounting sheet 17 in the longitudinal direction is longer than the circumferential length of the mounting portion of the determination result display device 10 in the test lead 5b, and the hook-and-loop fasteners 17c1 and 17c2 are formed in the overlap region. Is provided. As the mounting sheet 17, a flexible material suitable for winding around the outer surface 52 a of the test lead 5 such as a plastic sheet, an elastomer (or rubber) sheet, or a cloth can be used as appropriate.

  FIGS. 7A and 7B show the procedure of mounting the determination result display device 10 of this embodiment on the test lead 5b along the axial direction of the test lead 5b. As shown in FIG. 7A, the back surface 17 b at the end opposite to the side on which the display device main body 14 of the mounting sheet 17 is provided is placed on the outer surface 52 a of the test lead main body 52. Thereby, one surface fastener (for example, male) 17c1 provided adjacent to the end portion is exposed on the side opposite to the outer side surface 52a of the test lead main body 52. At this time, the mounting sheet 17 is arranged so that the longitudinal direction thereof intersects the axial direction of the test lead 5b. Then, the mounting sheet 17 is tested so that the back surface 17b of the end of the mounting sheet 17 on the side where the display device main body 14 is provided overlaps the end of the side where the one surface fastener 17c1 is provided. It is wound around the lead body 52. Thereafter, the other surface fastener (for example, female) 17c2 provided on the back surface 17b of the end portion of the mounting sheet 17 on which the display device main body 14 is provided is overlapped and fixed on the one surface fastener 17c1. As a result, as shown in FIG. 7B, the mounting sheet 17 is exposed to the test lead body 52 in a state where the first side surface 14 a of the display device body 14 is exposed to the side opposite to the outer side surface 52 a of the test lead body 52. The mounting sheet 17 is engaged with the outer side surface 52a of the test lead body 52.

  The procedure for removing the determination result display device 10 from the test lead 5b is roughly the reverse of the procedure for mounting. That is, by pulling the end of the mounting sheet 17 on the side where the display device main body 14 is provided away from the test lead 5b, the hook-and-loop fasteners 17c1 and 17c2 are disengaged, and the determination result display device 10 is tested. It can be removed from the lead 5b.

  As described above, the same effects as those of the first and second embodiments can be obtained by the configuration of the present embodiment. Further, according to the present embodiment, the determination result display device 10 can be mounted on the test lead 5b by a simple operation such as winding the flexible mounting sheet 17 as a fixing means around the test lead 5b.

  In this embodiment, the mounting sheet has both male and female hook-and-loop fasteners as fixing portions. However, for example, when the mounting sheet itself is formed of a material (felt or the like) that functions as a female hook-and-loop fastener, the female hook-and-loop fastener does not have to be specially provided. Moreover, the fixing method of a mounting sheet is not limited to the fixing method by the mechanical restraint force by a hook-and-loop fastener. For example, with a fixing method using other mechanical restraint force such as a button or a buckle, using a fitting between a concave part and a convex part, or locking a claw part and a receiving part such as a concave part or a step corresponding thereto. There may be. Or you may utilize restraint forces other than mechanical restraint forces, such as the fixing method by the magnetic restraint force by a magnetic member and a magnet.

Others While the present invention has been described with reference to specific embodiments, the present invention is not limited to the above embodiments.

  For example, in the above-described embodiment, the measurement apparatus is an ohmmeter and the measurement purpose is an electrical resistance. However, the present invention is not limited to this. For example, the measurement device may be an LCR meter, a digital multimeter (DMM), or the like, and the measurement purpose may be voltage, current, resistance, capacitance, or the like.

  In addition, the connection means for connecting the apparatus main body of the measurement apparatus and the determination result display apparatus so as to communicate with each other has been described as being connected by wire, but may be connected wirelessly.

DESCRIPTION OF SYMBOLS 1 Apparatus main body 2 Measurement value display part 3 Main body side determination result display part 4 Operation part 5 Test lead 6 Measurement circuit 7 Control circuit 7a Measurement part 7b Comparison part 10 Judgment result display apparatus 11 Judgment result display part 15 Mounting ring (fixing means)
17 Mounting sheet (fixing means)
100 measuring device

Claims (8)

A device main body to which a test lead is connected, wherein a measurement unit for obtaining a measurement value based on a signal input through the test lead and a comparison for comparing the measurement value obtained by the measurement unit with a reference value A device main body comprising: a unit; and a measurement value display unit for displaying the measurement value;
A determination result display unit that displays a result of comparison by the comparison unit, and a determination result display device that is fixedly attached to the test lead or detachably attached;
A measuring apparatus comprising:   The determination result display device is fixedly provided on the test lead, and the test lead includes a contact that is brought into contact with an object to be measured, a test lead body that holds the contact, and the contact The measuring apparatus according to claim 1, further comprising: a lead wire that connects a child to the apparatus main body; and a connection unit that communicatively connects the determination result display unit and the apparatus main body.   The measurement apparatus according to claim 2, wherein the determination result display unit includes an illumination unit that is turned on or off according to a result of comparison by the comparison unit.   The determination result display device is detachably attached to the test lead, and includes a display device main body that houses the determination result display unit, and a fixing unit that detachably fixes the display device main body to the test lead. The measuring apparatus according to claim 1, further comprising a connection unit that connects the determination result display unit and the apparatus main body so as to communicate with each other.   The measurement apparatus according to claim 4, wherein the determination result display unit includes an illumination unit that is turned on or off according to a result of comparison by the comparison unit.   The test lead includes a contact that is brought into contact with an object to be measured, a test lead body that is a columnar body having an axis that holds the contact, and a lead wire that connects the contact to the apparatus body. 6. The measuring apparatus according to claim 4, wherein the fixing means is engaged with an outer surface of the test lead body so as to surround the axis.   7. The fixing means according to claim 6, wherein the fixing means is a partially cut-out annular member elastically deformable along a surface substantially orthogonal to the axis, or a sheet-like member wound around the test lead main body. The measuring device described.   The determination result display device, as a result of comparison by the comparison unit, the measured value is a value exceeding the upper limit value as the reference time, a value less than the lower limit value as the reference value, The measurement apparatus according to any one of claims 1 to 7, wherein at least one of values that are not less than a lower limit value as a reference value and not more than an upper limit value as the reference value is displayed.

Images