JP2016090438A - Terminal connection structure and instrument test machine including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal connection structure, and an instrument test machine including the terminal connection structure that allow an electric connection between a tooth terminal and a tooth reception terminal to be excellently maintained.SOLUTION: In each of terminal attachment faces 5b and 5c, one end of plate members 8a and 8b made up of electric conductivity metal material having elasticity is anchored by a screw 9. Each of the plate members 8a and 8b is formed into a cantilever beam shape in which one end is anchored to each of the terminal attachment faces 5b and 5c, and the other end loosely moves, and constitutes a tooth reception terminal 8 (8A, 8B, 8C and 8D). Each tooth terminal 10 provided in a state of projecting to a smart meter 3 is pushed into each tooth reception terminal 8. A loose movement side of each of the plate member 8a and 8b constituting the tooth reception terminal 8 has a slit formed in a long side direction, in which the slit is divided into four parts in the long side direction. Accordingly, each of the plate members 8a and 8b comes into contact with either side face of the tooth terminal 10 at each sub-division parts divided into four parts, and thus, the tooth terminal 10 and the tooth reception terminal 8 are electrically connected at eight portions in total.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a terminal connection structure in which a blade terminal and a blade receiving terminal are electrically connected by contact pressure generated by the elasticity of the blade receiving terminal, and an instrument testing machine equipped with the terminal connecting structure.

  Conventionally, as this type of terminal connection structure, for example, there is a watt-hour meter disclosed in Patent Document 1.

  In this watt-hour meter terminal connection structure, as shown in FIGS. 6 and 7 of the same document, a blade terminal 321a having a width L4 is a first blade receiving terminal 321 having a width L1 and a second blade receiving having a width L2. Inserted into the terminal 341. The slit widths of the sandwiching portion 3213 of the first blade receiving terminal 321 and the sandwiching portion 3413 of the second blade receiving terminal 341 are narrower than the thickness width W of the blade terminal 321a. For this reason, when the blade terminal 321a is inserted, the holding portions 3213 and 3413 are expanded, and are provided by the body portions 3214 and 3215 of the first blade receiving terminal 321 and the body portions 3414 and 3415 of the second blade receiving terminal 341. The first and second blade receiving terminals 321 and 341 and the blade terminal 321a are surely electrically connected by the applied urging force.

JP 2014-126418 A

  However, in the above-described conventional terminal connection structure disclosed in Patent Document 1, when a contact surface between the blade terminal 321a and the first blade receiving terminal 321 or the second blade receiving terminal 341 has a protrusion of a terminal material or the like. The electrical connection between the blade terminal 321a and the first blade receiving terminal 321 or the second blade receiving terminal 341 is made at one point such as a projection. For this reason, the contact resistance between the blade terminal 321a and the first blade receiving terminal 321 or the second blade receiving terminal 341 is increased, and the electrical connection between the blade terminal 321a and the blade receiving terminal 321 or 341 is improved. Unstable because it becomes unstable.

The present invention has been made to solve such problems,
In the terminal connection structure in which the blade terminal and the blade receiving terminal are electrically connected by the contact pressure generated by the elasticity of the blade receiving terminal,
The blade receiving terminal is made of a plate material which is divided into a plurality of parts in the longitudinal direction, one end of which is fixed and the other end of which is idle.

  According to this configuration, electrical connection between the blade terminal and the blade receiving terminal is performed at a plurality of locations between the blade receiving terminal and the blade terminal made of a plate material divided into a plurality in the longitudinal direction. For this reason, even if there is a projection or the like on the contact surface between the blade terminal and the blade receiving terminal, the electrical connection between the divided portion of the plate material forming the blade receiving terminal that sandwiches the projection and the blade terminal As a result, the electrical connection between the remaining portion of the plate material and the blade terminal is kept stable. Therefore, it is possible to provide a terminal connection structure capable of maintaining good electrical connection between the blade terminal and the blade receiving terminal.

The present invention also provides:
In an instrument testing machine in which a blade terminal provided protruding from a meter under test is electrically connected to a blade receiving terminal provided in an instrument test connector by contact pressure generated by elasticity of the blade receiving terminal.
The blade receiving terminal is composed of a plate material divided into a plurality in the longitudinal direction, with one end fixed and the other end floating.
When the blade terminal is electrically connected to the blade receiving terminal, a holder for holding the other connector electrically connected to one connector is located at the position where one connector provided in the meter under test is located. It is characterized by providing.

  Also in this configuration, the electrical connection between the blade terminal provided protruding from the meter to be tested and the blade receiving terminal provided in the meter test connector consists of a plate material divided into a plurality in the longitudinal direction. This is reliably performed at a plurality of positions between the blade receiving terminal and the blade terminal. For this reason, it is intended to provide an instrument testing machine capable of maintaining good electrical connection between a blade terminal provided protruding from the instrument under test and a blade receiving terminal provided in the instrument test wire connection device. Can do.

  Also, during the test using the instrument tester of the meter under test, when the blade terminal provided protruding from the meter under test is electrically connected to the blade receiving terminal provided in the meter test connector, One connector provided on the test instrument and the other connector held on the holder are coupled simultaneously. For this reason, one connector provided on the meter under test and the other connector held by the holder can be coupled simultaneously with the electrical connection between the blade terminal and the blade receiving terminal. It is possible to provide an instrument testing machine capable of easily performing an electrical signal communication test that passes through.

  Further, the present invention is characterized in that in the above terminal connection structure or instrument tester, a plurality of blade receiving terminals having different lengths from one fixed end to the other floating end are provided.

  According to this configuration, the electrical connection between the blade terminal and the blade receiving terminal is preceded by the blade receiving terminal having a long length from one end to the other end and the blade receiving terminal having a short length from the one end to the other end. Done. Therefore, the force required to electrically connect the blade terminal and the blade receiving terminal includes the force required to connect the blade receiving terminal and the blade terminal having a long length, and the blade receiving terminal and the blade having a short length. It is distributed to the force required to connect the terminal. For this reason, the force required to electrically connect the blade terminal and the blade receiving terminal is reduced, and the electrical connection between the blade terminal and the blade receiving terminal can be easily performed.

  According to the present invention, it is possible to provide a terminal connection structure capable of maintaining good electrical connection between a blade terminal and a blade receiving terminal, and an instrument testing machine equipped with the terminal connection structure.

(A) is a front view of the meter testing machine by one embodiment of the present invention, and (b) is a side view. (A) is a front view of the instrument testing machine shown in FIG. 1 in a state in which the holder is removed, and (b) is a side view.

  Next, the form for implementing this invention which applied the terminal connection structure by this invention to the instrument tester is demonstrated.

  FIG. 1A is a front view of an instrument testing machine according to an embodiment of the present invention, and FIG.

  The instrument tester is configured by attaching a test instrument connector 1 and a holder 2 to a panel (not shown). The instrument test connector 1 has screws (not shown) inserted into the mounting holes 1a provided at the four ends of the both ends, and the holder 2 has screws (not shown) inserted into the mounting holes 2a provided at the two ends. And attached to the panel. This instrument tester is used to perform a measurement test of the meter under test, for example, a smart meter 3 and an electric signal communication test via the modular jack connector 4.

  FIG. 2A is a front view of the instrument testing machine with the holder 2 removed, and FIG. 2B is a side view thereof. In FIG. 2, the same parts as those in FIG.

  The instrument test connector 1 contains four terminal fittings 5 (5A, 5B, 5C, 5D) made of a conductive metal material such as brass in parallel with each other. Each terminal fitting 5 has an electric wire insertion opening 5a opened at one end, and the tip of the electric wire 6 (6A, 6B, 6C, 6D) is removed and inserted into the electric wire insertion opening 5a. It is fixed with screws 7. Test power is supplied to the two electric wires 6A and 6B connected to the two terminal fittings 5A and 5B on the left side of the instrument test connector 1, and the two electric terminals 6C and 5D on the right side are connected. A test load is connected to the two electric wires 6C and 6D.

  The other end portion of each terminal fitting 5 is cut at the upper surface side and the bottom surface side to reduce the thickness, and the terminal mounting surfaces 5b and 5c are formed facing this end portion. One end of plate members 8a and 8b made of a conductive metal material having elasticity is fixed to each terminal mounting surface 5b and 5c with a screw 9. Each of the plate members 8a and 8b has a cantilever shape in which one end is fixed to each terminal mounting surface 5b and 5c and the other end is floating, and constitutes a blade receiving terminal 8 (8A, 8B, 8C and 8D). To do. Each blade terminal 10 provided so as to protrude from the smart meter 3 is press-fitted into each blade receiving terminal 8 as illustrated.

  As shown in the side view of FIG. 4B, the respective plate members 8a and 8b are arranged in line with each other with respect to the center line of the terminal fitting 5, and have shapes that open in the directions away from each other at the other end that moves freely. The bent 8a1 and 8b1 are formed. The bends 8a1 and 8b1 at the tips of the plate members 8a and 8b serve to guide the blade terminal 10 when the blade terminal 10 is inserted into the blade receiving terminal 8. Further, a narrower interval than the thickness of the blade terminal 10 is provided in the holding portion 8c that holds the blade terminal 10 in which the interval between the plate members 8a and 8b is the narrowest. When the blade terminal 10 is press-fitted into the clamping portion 8c and the blade receiving terminal 8 is expanded, bending stress is applied to the body portions 8a2 and 8b2 of the plate members 8a and 8b. The blade terminal 10 of the smart meter 3 is electrically connected to the blade receiving terminal 8 provided in the meter test connector 1 with a contact pressure generated by the elasticity of the body portions 8a2 and 8b2 according to the bending stress.

  In this embodiment, the floating end sides of the plate members 8a and 8b constituting the blade receiving terminal 8 are slit in the longitudinal direction as shown in the front view of FIG. It is divided into two. Accordingly, the plate members 8a and 8b are in contact with both side surfaces of the blade terminal 10 at the respective divided portions divided into four parts, so that the blade terminal 10 and the blade receiving terminal 8 are electrically connected in a total of eight locations. It will be. The contact area between the blade terminal 10 and the blade receiving terminal 8 is ensured to an appropriate contact area obtained by summing up the contact areas at each of these points, and the load current flows by diverting these points. Therefore, it is possible to carry out test energization with a relatively large current capacity.

  In addition, the contact pressure between the blade terminal 10 and the blade receiving terminal 8 can be adjusted by adjusting the number of divisions of the plate members 8a and 8b and the length of the slot, and by adjusting the contact pressure, The insertion pressure when the blade terminal 10 is press-fitted into the blade receiving terminal 8 is also adjusted.

  Further, in the present embodiment, blade receiving terminals 8A and 8D provided on both ends of the instrument test connector 1, and blade receiving terminals 8B and 8C provided on the center side of the instrument test connector 1 The lengths of the plate members 8a and 8b from one end fixed to the terminal mounting surfaces 5b and 5c to the other end floating are different, and the lengths of the plate members 8a and 8b of the blade receiving terminals 8A and 8D are the blade receiving terminals. It is longer by the dimension L than the length of the plate members 8a and 8b of 8B and 8C.

  When the smart meter 3 is tested, the smart meter 3 is slid in the direction from the upper side to the lower side in the figure indicated by the arrow E, so that each blade terminal 10 is press-fitted into each blade receiving terminal 8 in parallel and electrically Connected to. A modular jack connector 4 is exposed below the smart meter 3, while a modular plug connector 11 electrically connected to the modular jack connector 4 is provided on the instrument tester side as shown in FIG. 12 is held by the holder 2. In the front view of FIG. 6A, the upper surface side of the modular jack connector 4 is broken. In the side view of FIG. 5B, the right side surfaces of the modular jack connector 4 and the adapter 12 are broken. Is shown. The position where the holder 2 holds the modular plug connector 11 is provided in the smart meter 3 when the smart meter 3 is slid as described above and the blade terminal 10 is electrically connected to the blade receiving terminal 8. Further, the modular jack connector 4 is located.

  The holder 2 is configured by bending an iron plate at an interval wider than the width of the instrument test connector 1, and an L-shaped bent portion 2 b is formed obliquely above the instrument test connector 1. . A resin adapter 12 is fixed to the L-shaped bent portion 2b with screws 13 and 14, and the modular plug connector 11 is fitted to the adapter 12. A concave portion is formed in the adapter 12 where the modular plug connector 11 is fitted, and the modular plug connector 11 is fitted into the concave portion so that its mounting position does not move. The adapter 12 has a through hole 12a, and the L-shaped bent portion 2b has a hole (not shown) communicating with the through hole 12a. Lead wires 15 extending from the modular plug connector 11 are passed through the through holes 12a and the holes.

  In such a configuration, the metering test of the smart meter 3 and the electrical signal communication test via the modular jack connector 4 are performed by sliding the smart meter 3 in the direction of arrow E as described above, and each blade terminal of the smart meter 3. 10 is a modular plug in which a modular jack connector 4 provided in the smart meter 3 is held in the holder 2 by being press-fitted into and electrically connected to each blade receiving terminal 8 provided in the instrument test connector 1. This is done by being coupled to and electrically connected to the connector 11. When each blade terminal 10 of the smart meter 3 is electrically connected to each blade receiving terminal 8 provided in the meter test connector 1, electric power is supplied to the smart meter 3 via the electric wires 6A and 6B. A load current flows through the electric wires 6A to 6D. The metering test of the smart meter 3 is performed by the smart meter 3 measuring the amount of power used according to the load current. In the electric signal communication test via the modular jack connector 4, the smart meter 3 sends and receives electric signals to and from the instrument tester via the electrically connected modular jack connector 4 and the modular plug connector 11. Is done.

  According to such a terminal connection structure and an instrument testing machine according to the present embodiment, between the blade terminal 10 protruding from the smart meter 3 and the blade receiving terminal 8 provided in the instrument test connector 1. As described above, the electrical connection is reliably performed at eight positions between the blade receiving terminal 8 made of the plate members 8a and 8b divided into four in the longitudinal direction and both side surfaces of the blade terminal 10, respectively. . For this reason, even if there is a protrusion made of a terminal material or the like on the contact surface between the blade terminal 10 and the blade receiving terminal 8, the divided portion of the plate material 8a or 8b sandwiching the protrusion and the like and the blade terminal 10 The electrical connection between the blade terminals 10 and the blade terminal 10 is kept stable only by the unstable electrical connection between the blade terminals 10. Therefore, a terminal connection structure and a meter capable of maintaining good electrical connection between the blade terminal 10 protruding from the smart meter 3 and the blade receiving terminal 8 provided in the meter test connector 1 A testing machine can be provided.

  Further, during the test using the meter tester of the smart meter 3, the blade terminal 10 provided protruding from the smart meter 3 is electrically connected to the blade receiving terminal 8 provided in the meter test connector 1. At this time, one modular jack connector 4 provided in the smart meter 3 and the other modular plug connector 11 held by the holder 2 are coupled simultaneously. For this reason, the coupling between one modular jack connector 4 provided in the smart meter 3 and the other modular plug connector 11 held by the holder 2 is performed simultaneously with the electrical connection between the blade terminal 10 and the blade receiving terminal 8. It is possible to provide an instrument tester that can easily perform an electrical signal communication test via the modular jack connector 4 of the smart meter 3.

  In the present embodiment, the blade terminal 10 and the blade receiving terminal 8 are electrically connected to the blade receiving terminals 8A and 8D having long plate members 8a and 8b from one end to the other end. This is performed prior to the blade receiving terminals 8B and 8C in which the length of the plate members 8a and 8b to the end is short. Therefore, the force required to electrically connect the blade terminal 10 and the blade receiving terminal 8 is the force required to connect the blade receiving terminals 8A and 8D and the blade terminal 10 having long plate members 8a and 8b. And the force required for connecting the blade receiving terminals 8B, 8C and the blade terminals 10 with the short lengths of the plate members 8a, 8b. For this reason, the force required to electrically connect the blade terminal 10 and the blade receiving terminal 8 is reduced, and the electrical connection between the blade terminal 10 and the blade receiving terminal 8 can be easily performed.

  In this embodiment, the case where the blade receiving terminal 8 is constituted by two plate members 8a and 8b has been described. However, the blade receiving terminal 8 may be constituted by only one of the plate members 8a and 8b. Good. Also in this case, the blade terminal 10 and the blade receiving terminal 8 are electrically connected by the contact pressure generated by the elasticity of the blade receiving terminal 8, and any one of the plate members 8a divided into four in the longitudinal direction or Since electrical connection between the blade terminal 10 and the blade receiving terminal 8 is performed at four positions between 8b and one side surface of the blade terminal 10, the same effects as those of the above-described embodiment are achieved.

  Further, in the present embodiment, the case where the panel to which the instrument test connector 1 and the holder 2 are attached is fixed and the smart meter 3 is slid downward, on the contrary, the smart meter is reversed. 3 is fixed, and the panel to which the instrument test connector 1 and the holder 2 are attached is slid upward to connect the blade terminal 10, the blade receiving terminal 8, the modular jack connector 4, and the modular plug connector 11 respectively. It may be. In this embodiment, the case where the meter to be tested is the smart meter 3 has been described. However, the meter to be tested is not limited to this, and the same applies to other meters having blade terminals. Can do. Even with each of these configurations, the same effects as those of the above-described embodiment can be obtained.

  In the above embodiment, the case where the terminal connection structure according to the present invention is applied to an instrument testing machine has been described. However, the terminal connection structure according to the present invention is not limited to this, and other electrical devices including a terminal connection structure in which the blade terminal and the blade receiving terminal are electrically connected by contact pressure generated by the elasticity of the blade receiving terminal. The present invention can be similarly applied to a device such as a unit watt-hour meter. In this case, as described above, the terminal connection structure according to the present invention is applied to the connection structure between the blade terminal protruding from the watt-hour meter unit and the blade receiving terminal provided in the base unit to which the watt-hour meter unit is mounted. The same effects as the terminal connection structure according to the embodiment are exhibited.

DESCRIPTION OF SYMBOLS 1 ... Instrument test connection device 2 ... Holder 1a, 2a ... Mounting hole 2b ... L-shaped bending part 3 ... Smart meter (instrument under test)
4 ... Modular jack connector 5 (5A, 5B, 5C, 5D) ... Terminal metal fitting 6 (6A, 6B, 6C, 6D) ... Electric wire 7 ... Terminal screw 8 (8A, 8B, 8C, 8D) ... Blade receiving terminal 8a, 8b ... Plate material 8a1, 8b1 ... Bending 8a2, 8b2 ... Body 8c ... Clamping part 9, 13, 14 ... Screw 10 ... Blade terminal 11 ... Modular plug connector 15 ... Lead wire

Claims (3)

In the terminal connection structure in which the blade terminal and the blade receiving terminal are electrically connected by the contact pressure generated by the elasticity of the blade receiving terminal,
The blade receiving terminal is made of a plate material divided into a plurality of parts in the longitudinal direction, one end of which is fixed and the other end of which is idle. In an instrument testing machine in which a blade terminal provided protruding from a meter under test is electrically connected to a blade receiving terminal provided in an instrument test connector by contact pressure generated by elasticity of the blade receiving terminal.
The blade receiving terminal is composed of a plate material divided into a plurality of parts in the longitudinal direction, with one end fixed and the other end floating.
When the blade terminal is electrically connected to the blade receiving terminal, the other connector that is electrically connected to one of the connectors is held at the position where the one connector provided in the measuring instrument is located. An instrument testing machine comprising a holding tool.   3. The terminal connection structure according to claim 1, or the instrument tester according to claim 2, comprising a plurality of the blade receiving terminals having different lengths from the one end to be fixed to the other end that is floating.

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