JP2014228427A - Measurement instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the thickness of an instrument body and to improve operability in a state where a test lead is installed.SOLUTION: An outer shape of an instrument body 4 is formed like a box, and on a rear surface 4b out of a plurality of surfaces constituting an exterior surface of the instrument body 4, linear grooves 41 reaching a top surface 4c being in contact with the rear surface 4b are formed in a Y direction orthogonal to a thickness direction of the instrument body 4 so as to have a length longer than that of connectors 13, and cover parts 44 are arranged which cover openings of the linear grooves 41 over a length equal to the length from deep walls 42 of the linear grooves 41 to front end parts of the connectors 13, and a bottomed holding cylinder part 46 to which front end parts of the connectors 13 of test leads 2 and 3 are to be inserted is formed of the cover parts 44, the deep walls 42, and portions facing the cover parts 44, of the rear surface 4b.

Description

  The present invention includes a device body having a test lead and a terminal portion into which a connector of the test lead is inserted, and a physical quantity (current value, voltage value, resistance, etc.) of the measurement object based on the measurement object signal input from the measurement object. The present invention relates to a measuring device for measuring values and the like.

  As this type of measuring apparatus, the applicant of the present application has already proposed a measuring apparatus (digital multimeter) disclosed in Patent Document 1 below. This measuring apparatus includes a test lead and an apparatus main body (equipment main body). In this case, the apparatus main body is formed in a box shape, and a plurality of test lead connectors (plugs) are inserted on the front side together with function switching means such as a rotary switch and display output means such as an LCD. Terminal portions (input terminals) are provided. The terminal portion is integrated with an insulating panel that is a front surface of the apparatus main body, and is suspended from the front side toward the rear side (along the thickness direction of the apparatus main body), and the bottomed holding cylinder portion A conductive hollow metal material embedded in the holding cylinder is provided. The hollow metal material constituting the terminal portion is connected to an input circuit disposed in the apparatus main body, and this input circuit is connected to a processing unit (CPU) disposed in the apparatus main body.

  With this configuration, in this measuring apparatus, first, the test lead connector is inserted vertically into the bottomed holding cylinder portion of the terminal portion from the front side of the device body, and the test lead is electrically connected to the hollow metal material of the terminal portion. Connecting. Thus, the processing unit can input the measurement target signal via the test lead and the input circuit. Next, the physical quantity to be measured is selected by operating the function switching means, and then the test lead is brought into contact with the measurement object. In this state, the processing unit inputs the measurement target signal via the test lead and the input circuit, and calculates the selected physical quantity for the measurement target by executing arithmetic processing on the measurement target signal, and displays it. The calculation result is displayed on the output means.

JP 2002-350177 A (3rd page, FIGS. 1, 2 and 5)

  However, the above measuring apparatus has the following problems to be improved. That is, this measuring apparatus employs a configuration in which the test lead connector is vertically inserted along the thickness direction of the apparatus main body into the terminal portion disposed on the exterior surface of the apparatus main body (the front surface in the above example). . In this case, in order to securely hold the test lead connector attached to the terminal portion in the terminal portion, it is necessary to regulate the length of the bottomed holding cylinder portion constituting the terminal portion to a certain extent. Therefore, this measuring apparatus has a problem to be improved that it is difficult to reduce the thickness of the apparatus main body because of the configuration in which such a bottomed holding cylinder portion is arranged along the thickness direction. Yes. Further, in this measuring apparatus, the connector of the test lead has a configuration in which the rear end side protrudes from the exterior surface in a state where the front end side is inserted into the terminal portion of the apparatus main body. There is a problem to be improved that it is difficult to operate because it gets in the way.

  The present invention has been made to improve such a problem, and it is a main object of the present invention to provide a measuring apparatus capable of reducing the thickness of the apparatus body and improving the operability in a state where a test lead is attached.

  In order to achieve the above object, the measuring apparatus according to claim 1 includes an apparatus main body provided with a terminal portion having a bottomed holding cylinder portion into which a distal end portion of a connector in a test lead brought into contact with a measurement object is inserted, The apparatus main body is a measurement target signal from the measurement target that is input via the terminal lead and the test lead that is connected to the terminal part by inserting the distal end of the connector into the bottomed holding cylinder part. A measurement device that measures a physical quantity of the measurement object based on the measurement object, wherein the device body has an outer shape formed in a box and is formed on a first surface of a plurality of surfaces constituting an exterior surface of the device body. The linear groove reaching the second surface in contact with the first surface is formed in a length exceeding the length of the connector and along the first direction intersecting the thickness direction of the apparatus body, Opening of the straight groove A cover portion covering the same length as the distal end portion of the connector from the back wall of the linear groove is disposed, and the cover portion, the back wall, and the cover portion on the first surface The bottomed holding cylinder portion is formed by the facing portion.

  The measuring device according to claim 2 is the measuring device according to claim 1, wherein the tip end portion of the connector is inserted into the bottomed holding cylinder portion on the outer peripheral surface of the rear end portion of the connector. , A knob portion protruding from the linear groove is disposed.

  The measuring device according to claim 3 is the measuring device according to claim 1 or 2, further comprising the test lead, and the test lead extending from the rear end at the rear end of the connector of the test lead. A protective portion capable of increasing the radius of curvature at the rear end of the cable is formed, and the distance from the second surface of the open end of the bottomed holding cylinder portion is determined by the tip of the connector being the bottomed In the state inserted in the holding cylinder part, it is prescribed | regulated that the front-end | tip part of the said protection part does not protrude from the said 2nd surface.

  According to a fourth aspect of the present invention, in the measurement apparatus according to any one of the first to third aspects, the back surface of the device body is defined as the first surface, and the upper surface of the device body is the second surface. It is defined as a surface.

  In the measuring apparatus according to the first aspect, the bottomed holding cylinder part of the terminal part into which the connector of the test lead is inserted is formed on the first surface of the apparatus main body along the first direction intersecting the thickness direction. Therefore, according to this measuring apparatus, unlike the configuration in which the bottomed holding cylinder portion is disposed in the apparatus main body along the thickness direction of the apparatus main body, the thickness of the apparatus main body can be significantly reduced (that is, the apparatus The body can be thinned). Further, in this measuring apparatus, since the connector of the test lead is connected to the terminal portion along the first surface, the protruding amount of the connector from the exterior surface of the apparatus body can be greatly reduced. Therefore, according to this measuring apparatus, the thickness of the measuring apparatus in a state where the connector of the test lead is connected to the apparatus main body can be greatly reduced, and the operability is improved because the connector does not interfere with the operation. Can be made.

  According to the measuring apparatus of the second aspect, since the knob portion is arranged on the connector of the test lead, the bottomed holding cylinder portion of the terminal portion into which the connector is inserted is formed in the linear groove formed on the first surface. Even if the structure to be formed is adopted, the insertion of the connector into the terminal portion and the removal from the terminal portion can be easily performed by using the knob portion protruding from the linear groove (in other words, protruding from the first surface). Can be done.

  In the measuring apparatus according to the third aspect, in a state where the connector of the test lead is connected to the terminal portion of the apparatus main body, the protection portion of the connector is maintained in a state where it does not protrude from the upper surface of the apparatus main body. Therefore, according to this measuring apparatus, the length of the measuring apparatus excluding the lead wire and the test pin in a state where the test lead is attached to the apparatus main body can be suppressed within the length of the apparatus main body.

  In the measuring apparatus according to claim 4, since the linear groove formed on the back surface of the apparatus body reaches the upper surface in contact with the back surface, the test lead connector is connected to the apparatus body. The lead can be pulled out from the upper surface side of the apparatus main body toward the measurement object. Therefore, according to this measuring apparatus, it is possible to prevent a situation in which the lead of the test lead crosses various switches and displays such as a rotary switch disposed on the front surface of the apparatus main body, thereby ensuring better operability. it can.

FIG. 2 is a configuration diagram showing each configuration of test leads 2 and 3 and an apparatus main body 4 constituting the measuring apparatus 1. FIG. 6 is a side view of the apparatus main body 4 as viewed from the side surface 4f. 3 is a plan view of the apparatus main body 4. FIG. It is principal part sectional drawing of the terminal part 31 vicinity along the WW line of FIG. 2 is a rear perspective view of the measuring device 1. FIG. 1 is a plan view of a measuring device 1. FIG. 3 is a main part rear view in the vicinity of terminal portions 31 and 32 of the measuring apparatus 1. FIG. 1 is a front perspective view of a measuring device 1. FIG.

  Hereinafter, embodiments of the measuring apparatus 1 will be described with reference to the accompanying drawings.

  First, the configuration of the measuring apparatus 1 will be described with reference to the drawings.

  As shown in FIG. 1, the measuring apparatus 1 includes a plurality of test leads (in this example, two test leads 2 and 3 as an example) and an apparatus main body 4. As shown in FIG. , 3 are used by connecting (inserting) connectors 13 described later to terminal units 31 and 32 described later of the apparatus main body 4.

  As shown in FIG. 1, each of the test leads 2 and 3 includes a lead wire 11, a test pin 12 connected to one end of the lead wire 11, and a connector 13 connected to the other end of the lead wire 11. . Further, as shown in the figure, the connector 13 is formed in a cylindrical shape and has a tip part (a lower end part in the figure, specifically, a part on the lower end side of a knob part 23 described later) described later. A connector main body 21 that can be inserted into the bottom holding cylinder portion, and a protective portion that is attached so as to cover the lead wire 11 at the rear end (the upper end in the figure) of the connector main body 21 to which the other end of the lead wire 11 is connected. 22 and a knob 23 formed to project from the outer peripheral surface of the rear end (upper end in the figure) of the connector main body 21. In this example, the connector main body 21 is formed in a cylindrical shape as an example, but may be formed in a rectangular tube shape.

  In this case, the protection part 22 is bent by increasing the radius of curvature in the vicinity of the rear end of the lead wire 11 connected to the rear end of the connector body 21 to be larger than the curvature radius of the lead wire 11 alone. Thus, the lead wire 11 is protected by limiting the minimum curvature so that it does not fall below the curvature at which breakage or the like may occur.

  The apparatus main body 4 is formed in a box having a rectangular parallelepiped shape. Specifically, as an example in this example, the apparatus main body 4 includes, as shown in FIGS. 1 to 8, a front surface 4a on which various switches such as a function selection rotary switch SW and a display DP are disposed, and this The back surface 4b parallel to the front surface 4a is configured as a plane, and the upper surface 4c, the lower surface 4d, and the two side surfaces 4e and 4f that are in contact with the front surface 4a and the back surface 4b, respectively, are formed in a rectangular parallelepiped box. Yes. Further, the apparatus body 4 has an exterior surface constituted by the front surface 4a, the back surface 4b, the upper surface 4c, the lower surface 4d, and the two side surfaces 4e and 4f.

  Further, as shown in FIG. 2, the upper surface 4c and the lower surface 4d are, as viewed from the side, an arcuate curved surface from which an intermediate portion P3 projects with respect to a portion P1 in contact with the front surface 4a and a portion P2 in contact with the back surface 4b. It consists of Further, the upper surface 4c and the lower surface 4d are viewed from the back (or front) as shown in FIGS. 1, 7, and 8 (in FIG. 7, only the upper surface 4c side is shown and the lower surface 4d is not shown). The contour line (when viewed) is formed into an arcuate curved surface having a concave central portion with respect to the portion near the side surface 4e and the portion near the side surface 4f. In addition, about the upper surface 4c, the lower surface 4d, and the two side surfaces 4e and 4f, the structure formed in the plane which each contact | connects at right angles to the front surface 4a and the back surface 4b is also employable.

  As shown in FIGS. 1, 3, and 5, the connectors 13 of the test leads 2 and 3 are attached to the back surface 4 b as the first surface among the plurality of surfaces constituting the exterior surface of the apparatus body 4. Terminal portions 31 and 32 for connection, storage portions 33 and 34 for storing the test pins 12 of the test leads 2 and 3, and a battery storage portion 35 are disposed.

  In this example, the battery storage unit 35 is not shown in the center of the back surface 4b along the width direction (X direction in the figure) along the length direction (Y direction in the figure) (for example, (Dry battery) is disposed so as to be housed. The terminal portion 31 and the storage portion 33 are arranged in the order of the terminal portion 31 and the storage portion 33 from the battery storage portion 35 side between the boundary between the back surface 4 b and the side surface 4 e and the battery storage portion 35. Further, the terminal portion 32 and the storage portion 34 are in a plane-symmetrical relationship with the terminal portion 31 and the storage portion 33 with the battery storage portion 35 as the center between the boundary between the back surface 4b and the side surface 4f and the battery storage portion 35. Thus, the terminal portion 32 and the storage portion 34 are arranged in this order from the battery storage portion 35 side.

  Specifically, the configuration of the terminal portions 31 and 32 will be described.

  As shown in FIGS. 1, 3, and 4, the back surface 4 b has a linear groove 41 reaching a top surface 4 c as a second surface in contact with the back surface 4 b with a predetermined length exceeding the length of the connector 13 and the device. A first direction that intersects the thickness direction (Z direction) of the main body 4 (in this example, the Y direction is orthogonal to the thickness direction, but is limited to 90 ° if the angle with respect to the Z direction is close to 90 °). The number of terminal portions 31 and 32 is equal to the number (two in this example). In this example, each linear groove 41 is formed along the battery housing part 35 on both sides of the battery housing part 35. Further, as shown in FIG. 3, each linear groove 41 has a semicircular shape in which the outline of the inner surface in a plan view is aligned with the outer peripheral surface of the cylindrical connector body 21. That is, the depth of each linear groove 41 is defined to be equal to the radius of the connector body 21. Further, as shown in each figure, a contact 43 faces the upper surface 4c and is parallel to the Y direction on the back wall 42 (wall portion parallel to the plane perpendicular to the Y direction) in each linear groove 41. Respectively. In this example, the contact 43 is configured as a male contact as an example, but may be configured as a female contact.

  Further, the back surface 4b has an opening on the back wall 42 side among the openings that open to the back surface 4b side of each linear groove 41 (specifically, from the back wall 42 of the linear groove 41 to the connector body 21. A cover portion 44 is formed to cover the distal end portion (which is also the distal end portion of the connector 13) in the range extending over the same length. In this example, as shown in FIG. 3, the cover portion 44 has a semicircular shape in which the outline of the inner surface in a plan view is aligned with the outer peripheral surface of the cylindrical connector body 21.

  With this configuration, in the apparatus main body 4, the cover portion 44 formed in the linear groove 41 on the side surface 4 e side of each linear groove 41, the back wall 42 in the linear groove 41, and the back surface 4 b A bottomed holding for inserting the distal end portion of the connector main body 21 on the test lead 2 side by a portion 45 facing the cover portion 44 (a portion facing the cover portion 44 among the portions constituting the linear groove 41 on the back surface 4b). A cylindrical portion 46 is formed on the back side of the linear groove 41. The terminal portion 31 for connecting the connector 13 of the test lead 2 is constituted by the bottomed holding cylinder portion 46 and the contact 43 erected on the back wall 42 forming the bottomed holding cylinder portion 46. Has been. In this configuration, the surface of the back wall 42 constitutes the bottom surface of the bottomed holding cylinder portion 46.

  Moreover, in this apparatus main body 4, by the cover part 44 formed in the linear groove | channel 41 by the side surface 4f side, the back wall 42 in this linear groove | channel 41, and the opposing part 45 with this cover part 44 in the back surface 4b, A bottomed holding cylinder portion 46 into which the tip end of the connector main body 21 on the test lead 3 side is inserted is formed on the back side of the linear groove 41. The terminal portion 32 for connecting the connector 13 of the test lead 3 is constituted by the bottomed holding tube portion 46 and the contact 43 erected on the back wall 42 forming the bottomed holding tube portion 46. Has been.

  Further, as shown in FIG. 1, the distance L1 from the open end of each bottomed holding cylinder portion 46 to the intermediate portion P3 of the upper surface 4c is the length of the knob portion 23 and the length of the protective portion 22 (each length is The length along the length direction of the connector 13) is defined to be longer than the length L2. In the measuring apparatus 1, as will be described later, the upper surface 4c has a contour line (specifically, the contour line of the intermediate portion P3 of the upper surface 4c) when viewed from the back (or front view) and a portion close to the side surface 4e. It is formed so as to be an arcuate curved surface with a recessed central portion with respect to the portion close to the side surface 4f (see FIG. 7). For this reason, the distance L1 is a line segment extending from the open end of each bottomed holding cylinder part 46 to the above contour line along the central axis of each bottomed holding cylinder part 46 when the measuring apparatus 1 is viewed from the back. The length of With this configuration, as shown in FIG. 7, the tip of the connector main body 21 constituting the connector 13 of each test lead 2, 3 is gripped by the bottomed holding cylinder portion 46 of the corresponding terminal portion 31, 32. Is inserted until it contacts the open end of the bottomed holding cylinder portion 46, the protection portion 22 of each connector 13 is maintained so as not to protrude from the upper surface 4c of the apparatus body 4.

  Next, the structure of the accommodating parts 33 and 34 is demonstrated concretely.

  The storage portions 33 and 34 are configured so that the test pins 12 of the test leads 2 and 3 can be removed on the back surface 4b and can be held in a state parallel to the length direction (Y direction) of the apparatus body 4. As shown in FIGS. 1 and 3, it is composed of a pair of holding pieces 51 and 52 that are projected from the back surface 4 b in accordance with the outer shape of the test pin 12.

  In this example, of the holding pieces 51 and 52, the holding piece 51 is extended along the portion (in the Y direction) that contacts the side surface (side surfaces 4e and 4f) of the back surface 4b, and the other holding pieces 52 are , Extending along the cover portion 44 (along the Y direction) of the bottomed holding cylinder portion 46 disposed in the vicinity. Each holding piece 51, 52 is formed with a notch 53 into which the flange 12a of the test pin 12 is fitted when the test pin 12 is mounted. In the storage portions 33 and 34, the test pin 12 was pressed between the tips of the pair of holding pieces 51 and 52 with the tips thereof facing the upper surface 4 c with the flange portion 12 a aligned with the notch 53. In this case, the pair of holding pieces 51 and 52 are once elastically deformed in the direction in which they are separated from each other and the test pins 12 are accommodated between each other. It is configured to be holdable.

  In the measuring apparatus 1, when used, the connectors 13 of the test leads 2 and 3 are connected (inserted) to the terminal portions 31 and 32 of the apparatus body 4. Specifically, first, the connector 13 has a knob 23 formed on the rear end side of the connector main body 21 protruding from the linear groove 41, and the outer peripheral surface on the tip end side of the connector main body 21 is the linear groove 41. It is located in the linear groove | channel 41 in the state which contacts the inner surface of this. Next, the connector 23 is moved along the linear groove 41 in the direction of the lower surface 4 d by grasping the knob 23. As a result, the distal end portion of the connector main body 21 enters the bottomed holding cylinder portion 46 constituting the terminal portions 31 and 32. Note that the movement of the connector 13 in the direction of the lower surface 4d is stopped when the knob 23 abuts against the open end of the bottomed holding cylinder 46. Thereby, the connection of the connector 13 of the test leads 2 and 3 to the terminal portions 31 and 32 of the apparatus body 4 is completed, and the test leads 2 and 3 are electrically connected to the contacts 43 of the terminal portions 31 and 32. Connected (see FIGS. 5, 6, 7 and 8). That is, the measuring apparatus 1 is ready for use.

  In this measuring apparatus 1, the bottomed holding cylinder part 46 of each terminal part 31, 32 into which the connector 13 of each test lead 2, 3 is inserted is along a first direction intersecting the thickness direction of the apparatus body 4 (this example). Then, it is formed along the back surface 4b orthogonal to the thickness direction of the apparatus main body 4. Therefore, according to this measuring apparatus 1, unlike the configuration in which the bottomed holding cylinder portion 46 is disposed in the apparatus main body 4 along the thickness direction (Z direction) of the apparatus main body 4, the thickness of the apparatus main body 4 is greatly increased. The apparatus main body 4 can be thinned. Moreover, in this measuring apparatus 1, since the connector 13 of each test lead 2 and 3 is connected to each terminal part 31 and 32 along the back surface 4b, the protrusion amount of the connector 13 from the exterior surface of the apparatus body 4 Can be greatly reduced. Therefore, according to this measuring apparatus 1, the thickness of the measuring apparatus 1 in a state where the connectors 13 of the test leads 2 and 3 are connected to the apparatus main body 4 can be greatly reduced, and the connector 13 can be operated in operation. Since it does not get in the way, the operability can be improved.

  Further, according to this measuring apparatus 1, since the knob portion 23 is disposed on the connector 13 of each test lead 2, 3, the bottomed holding cylinder portion 46 of each terminal portion 31, 32 into which the connector 13 is inserted is provided. Even if the configuration formed in the linear groove 41 formed on the back surface 4b is adopted, as shown in FIGS. 5, 6 and 7, it protrudes from the opening of the linear groove 41 (in other words, protrudes from the back surface 4b). By using the knob 23, the connector 13 can be easily inserted into and removed from the terminal portions 31 and 32. In addition, since the knob | pick part 23 should just be formed so that it may protrude from the outer peripheral surface of the connector main body 21 to a finger | toe, presence of this knob | pick part 23 does not impair the thinning of the measuring apparatus 1. FIG.

  Further, in this measuring apparatus 1, in the state where the connectors 13 of the test leads 2 and 3 are connected to the terminal portions 31 and 32 of the apparatus main body 4, as shown in FIG. The state of not projecting from the upper surface 4c of the main body 4 is maintained. Therefore, according to the measuring apparatus 1, the length of the measuring apparatus 1 excluding the lead wire 11 and the test pin 12 with the test leads 2 and 3 attached to the apparatus main body 4 is within the length of the apparatus main body 4. Can be suppressed.

  Moreover, according to this measuring apparatus 1, since the linear groove | channel 41 formed in the back surface 4b of the apparatus main body 4 has reached the upper surface 4c which contact | connects this back surface 4b, each test lead 2 is provided in the apparatus main body 4. FIG. The test leads 2 and 3 can be pulled out from the upper surface 4c side of the apparatus main body 4 toward the measurement object. Thereby, according to this measuring apparatus 1, since the lead wire 11 of each test lead 2 and 3 can prevent the situation which crosses various switches and displays, such as a rotary switch arrange | positioned at the front surface 4a of the apparatus main body 4, more Good operability can be ensured.

  Further, in the measuring apparatus 1, the test leads 2 and 3 are stored in the storage portions 33 and 34 disposed in the apparatus main body 4 while the connectors 13 of the test leads 2 and 3 are connected to the apparatus main body 4. At this time, the lead wire 11 extending from the upper surface 4c side of the device body 4 is wound in the order of the upper surface 4c, the front surface 4a, the lower surface 4d, the back surface 4b, the upper surface 4c, the front surface 4a, the lower surface 4d, and the back surface 4b. Thus, the test pin 12 is stored in the storage units 33 and 34. In this state, in this measuring apparatus 1, since the upper surface 4c and the lower surface 4d are configured with curved surfaces as shown in FIG. 2, the lead wire 11 is not less than a curvature that may cause damage to the lead wire 11. 11 radii of curvature can be limited.

  Further, in this measuring apparatus 1, the upper surface 4c and the lower surface 4d are centered with respect to the part near the side face 4e and the part near the side face 4f when the back view (or front view) is viewed as shown in FIG. The part is formed to be a concave arcuate curved surface. Therefore, according to this measuring device 1, it is possible to reliably prevent the lead wire 11 wound around the device body 4 from being disconnected from the side surface 4e and the side surface 4f of the device body 4 as described above.

  In the above example, the connector main body 21 of the connector 13 is formed in a cylindrical shape, but may be formed in a cylindrical shape such as a square tube in addition to the cylindrical shape. Moreover, about the depth of the linear groove | channel 41, it can replace with said structure made the same as the radius of the cylindrical connector main body 21, and can also employ | adopt the structure deeper than the radius of the cylindrical connector main body 21. FIG. .

  In addition, the configuration in which the back surface 4b of the exterior surface of the apparatus body 4 is the first surface that forms the terminal portions 31 and 32 and the upper surface 4c is the second surface that is in contact with the first surface has been described above. 1 may be configured such that the lower surface 4d of the apparatus main body 4 is the second surface and the lead wires 11 of the test leads 2 and 3 are pulled out from the lower surface 4d side, or one of the side surfaces 4e and 4f of the apparatus main body 4 is As the second surface, the lead wires 11 of the test leads 2 and 3 can be drawn from either side surface.

  Further, in the apparatus main body 4 in which various switches such as a rotary switch and a display are disposed on the front surface 4a, it is preferable to adopt the above-described configuration in which the back surface 4b is the first surface for the reasons described above, but the side surface 4e. , 4f may have a first surface. Furthermore, for example, when the front view shape of the apparatus main body 4 is sufficiently large and there is a space in which the terminal portions 31 and 32 are sufficiently disposed, a configuration in which the front surface 4a is the first surface may be employed.

DESCRIPTION OF SYMBOLS 1 Measuring apparatus 2, 3 Test lead 4 Apparatus main body 4b Back surface (1st surface)
4c Upper surface (second surface)
DESCRIPTION OF SYMBOLS 13 Connector 22 Protection part 23 Knob part 31,32 Terminal part 41 Linear groove 42 Back wall 43 Contact 44 Cover part 45 Opposite part 46 Bottomed holding cylinder part

Claims (4)

An apparatus main body having a terminal portion having a bottomed holding cylinder portion into which a distal end portion of a connector in a test lead brought into contact with a measurement object is inserted, and the apparatus main body is connected to the bottomed holding cylinder portion of the connector. A measuring device that measures a physical quantity of the measurement target based on the test lead inserted into the tip portion and connected to the terminal portion, and a measurement target signal input from the measurement target via the terminal portion; There,
The device body has a box-shaped outer shape,
The first surface of the plurality of surfaces constituting the exterior surface of the apparatus main body has a linear groove that reaches the second surface in contact with the first surface, and has a length that exceeds the length of the connector. It is formed along a first direction intersecting the thickness direction of the apparatus main body, and covers the opening of the linear groove from the back wall of the linear groove over a length equivalent to the tip of the connector. A cover portion is provided,
The measuring apparatus in which the bottomed holding cylinder portion is formed by the cover portion, the back wall, and a portion of the first surface facing the cover portion.   The knob is provided on the outer peripheral surface of the rear end portion of the connector so as to protrude from the linear groove in a state where the tip end portion of the connector is inserted into the bottomed holding cylinder portion. The measuring device described. The test lead is provided, and at the rear end of the connector of the test lead, a protection portion capable of increasing the radius of curvature at the rear end of the cable of the test lead extending from the rear end is formed.
The distance from the second surface of the open end of the bottomed holding cylinder portion is such that the tip of the protection portion is the second surface when the tip of the connector is inserted into the bottomed holding cylinder. The measuring apparatus according to claim 1, wherein the measuring apparatus is defined so as not to protrude from the head.   The measuring apparatus according to claim 1, wherein a back surface of the apparatus main body is defined as the first surface, and an upper surface of the apparatus main body is defined as the second surface.

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