JP7448408B2 - Instrument terminal connection structure - Google Patents

Description

The present invention relates to a terminal connection structure for a meter.

For example, in a power integrating meter installed in a single-family house or condominium, in order to connect the integrating meter main body and the conductor wire, it is common to overlap the terminal on the conducting wire side with the terminal on the integrated meter main body side and tighten it with a screw to make a continuity connection. be. However, according to this method, a separate tool such as a screwdriver is required for the connection work, and the screws may be dropped when installing the screws, which is surprisingly troublesome to handle.Therefore, a connection structure that does not use screws is long-awaited. It was done.

Therefore, a conventional technique that does not use screws is shown in Patent Document 1. In this terminal connection structure, in order to connect the terminals 117 to each other, pull up the knob 111 against the urging force of the coil spring 115, and in this state, insert the terminal 117 between the holding plate 114 of the base 107 and the connection fitting 108. Insert it and release the knob 111. Then, the rod 112 is lowered by the release of the coil spring 115, and the terminal 117 is sandwiched between the holding plate 114 and the connecting fitting 108 with the protrusion 122 inserted into the hole 118. In this case, since the rod 112 is inserted into the hole 118, the terminal 117 cannot be removed. Conversely, in order to remove the terminal 117, it is necessary to lift the knob 111 against the biasing force of the coil spring 115 and remove the rod 112 inserted into the hole 118. In the conventional terminal connection structure, as mentioned above, in addition to inserting or removing the terminal 117, the rod 112 must be kept lifted against the spring 115 by the knob 111 each time. The continuous work was troublesome.

Japanese Patent Application Publication No. 9-161868

The present invention was made in order to solve the problems in the prior art, and aims to provide a terminal connection structure for a meter that can connect and release terminals with one touch without using screws. shall be.

A first form of the terminal connection structure of a meter according to the present invention is a wire (3) connected to the side of a meter unit (22) including a meter body (22a) and a meter body frame (22b) or connected to the meter unit (22). The first terminal (23) provided on one of the sides and the second and third terminals (24; 24A, 24B) provided on the other side are connected by the connection operation member (28, 30). In the terminal connection structure of the instrument,
The first to third terminals (23, 24A, 24B) each extend in the axial direction of the wire, and the second and third terminals (24A, 24B) are positioned across the first terminal (23). and
The connection operation member (28, 30) is attached to the instrument body frame (22b) for manual operation, and includes a movable cam member (28) having a cam portion (28a) and movable in a predetermined direction, and a terminal. a terminal pressing member (30) having a pressing portion (30c) and movable in a direction perpendicular to the predetermined direction by being pressed by the cam portion (28a) of the movable cam member (28);
When the moving cam member (28) is operated to move, the terminal pressing member (30) is moved in the orthogonal direction via the cam portion (28a), and the terminal pressing portion (30) of the terminal pressing member (30) is moved. 30c), the second and third terminals (24A, 24B) are moved close to the first terminal (23) and brought into contact with each other.
In a second form of the terminal connection structure for a meter according to the present invention, the first to third terminals (23; 24A, 24B) are connected to a terminal pressing portion (30c) of the terminal pressing member (30) and a terminal connecting structure for the meter. The main body (22a) is pressed and held between the main body (22a) and a predetermined portion (29a) to establish contact continuity.
In a third form of the terminal connection structure for a meter according to the present invention, the first terminal (23) is provided on the meter main body (22a) side, and the second and third terminals (24A, 24B) are provided on the meter body (22a) side. It is provided on the wire (3) side.
A fourth form of the terminal connection structure of a meter according to the present invention is a wire (3) connected to the side of a meter unit (22) including a meter body (22a) and a meter body frame (22b) or connected to the meter unit (22). The first terminal (23) provided on one of the sides and the second and third terminals (24; 24A, 24B) provided on the other side are connected by the connection operation member (28, 30). In the terminal connection structure of the instrument,
The first to third terminals (23, 24A, 24B) each extend in the axial direction of the wire, and the second and third terminals (24A, 24B) are positioned across the first terminal (23). and
The connection operation member (28, 30) is attached to the attachment member (27) attached to the instrument unit (22) so as to be manually operable, has a cam portion (28a), and is movable in a predetermined direction. a terminal pressing member that has a movable cam member (28) and a terminal pressing portion (30c) and is movable in a direction perpendicular to the predetermined direction when pressed by the cam portion (28a) of the movable cam member (28); (30) and
When the moving cam member (28) is operated to move, the terminal pressing member (30) is moved in the orthogonal direction via the cam portion (28a), and the terminal pressing portion (30) of the terminal pressing member (30) is moved. 30c), the second and third terminals (24A, 24B) are moved close to the first terminal (23) and brought into contact with each other.
In a fifth form of the terminal connection structure for a meter according to the present invention, the first to third terminals (23; 24A, 24B) are connected to a terminal pressing portion (30c) of the terminal pressing member (30) and a terminal connecting structure for the meter. The main body (22a) is pressed and held between the main body (22a) and a predetermined portion (29a) to establish contact continuity.
In a sixth form of the terminal connection structure for a meter according to the present invention, the first terminal (23) is provided on the meter main body (22a) side, and the second and third terminals (24A, 24B) are provided on the meter body (22a) side. It is provided on the wire (3) side.

In the present invention, terminal connection of the meter can be completed reliably with one touch only by rotating or sliding the connection operation member (9, 28).

1 is an external perspective view of an example of an assembly of a power integrating meter and a conducting wire to which an embodiment of the meter terminal connection structure of the present invention is applied; FIG. FIG. 2 shows a perspective view of the assembly shown in FIG. 1 with the cover removed. FIG. 3 shows an exploded perspective view of the assembly. The exploded perspective view of the attachment member, the conductive wire, and the connection operation member portion of the assembly is shown. FIG. 7 shows a plan view of the assembly with the cover removed before operation; Same as above, showing a plan view after operation. The partial enlarged plan view of the terminal connection part of the said assembly before connection is shown. Same as above, showing a partially enlarged plan view in the middle of connection. Same as above, showing a partially enlarged plan view after the connection is completed. FIG. 7 is a perspective view showing an example of an assembly of a power integrating meter and a conducting wire to which another embodiment of the meter terminal connection structure of the present invention is applied. FIG. 11 shows a perspective view of the other instrument assembly shown in FIG. 10 with the cover removed. An exploded perspective view of the other assembly is shown. An exploded perspective view of the attachment member, wire, and connection operation member portion of the assembly is shown. FIG. 7 shows a plan view of the other assembly with the cover removed before operation; FIG. Same as above, showing a plan view after operation. A partial enlarged longitudinal sectional view of the terminal connection portion of the other assembly before connection is shown. Same as above, showing a partially enlarged longitudinal sectional view after connection is completed. The schematic diagram which shows an example of the terminal connection structure of the conventional meter is shown.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 shows an external perspective view of an example of a meter assembly including a power integrating meter (hereinafter referred to as a meter) and a conducting wire (hereinafter referred to as a wire) to which an embodiment of the meter terminal connection structure of the present invention is applied. , FIG. 2 shows an external perspective view of the instrument assembly shown in FIG. 1 with the cover removed, FIG. 3 shows an exploded perspective view of the assembly, and FIG. 4 shows an attachment member of the assembly, An exploded perspective view of the wire and connection operating member portions is shown, and FIGS. 5 and 6 show plan views of the assembly before and after operation, respectively, with the cover removed.

As shown in FIG. 1, the meter assembly 1 includes a meter unit 2 and a plurality of wires 3 attached thereto. When the cover 4 (FIG. 1) is removed, the meter unit 2 consists of a meter body 2a and a meter body frame 2b, as shown in FIGS. 2 and 3, and three L-shaped terminals 5 are attached to each meter body frame 2b. It is fixed with screw 6.
Reference numeral 7 denotes a wire side terminal having a substantially U-shaped (or L-shaped) cross section (see FIG. 4), which has a conductive portion 7a extending in a direction perpendicular to the axial direction of the wire on the distal end side, and a wire terminal on the proximal end side. It is conductively fixed to the conductive wire 3a of No.3. This wire side terminal 7 is engaged with a terminal mounting recess 8a of an attachment member 8, which will be described later.
Reference numeral 8 denotes an attachment member for storing and holding the instrument unit 2, and a pair of frame units 10 each having three connection operation members 9 rotatably attached thereto are attached thereto. As shown in FIG. 4, the connection operation member 9 has an operation section 9a, a collar section 9b, and a cam section 9c.

Next, a state in which the instrument unit 2, the wire side terminal 7, and the frame unit 10 are attached to the attachment member 8 is shown in FIGS. 5 and 7. According to this, as shown in FIG. 7 in particular, the conductive portion 5a (see FIG. 3) extending downward of the L-shaped terminal 5 and the conductive portion 7a of the wire side terminal 7 are separated by a small distance d1 (FIG. 7). The cam portion 9c of the connection operation member 9 is not in contact with the conductive portion 7a, and the cam portion 9c of the connection operation member 9 is not in contact with the conductive portion 7a.
Next, the operation of the first embodiment of the terminal connection structure of the meter will be described.
In FIG. 7, when the operating portion 9a of the connecting operating member 9 is pinched and rotated counterclockwise, the connecting operating member 9 rotates in the same direction, and its cam portion 9c contacts the conductive portion 7a. (See FIG. 8) When the connection operation member 9 is further rotated in the same direction, the cam portion 9c presses and moves the conductive portion 7a in the direction approaching the instrument side terminal 5 by the above-mentioned dimension d1, so that the conductive portion 7a is The conductive portion 5a of the shaped terminal 5 is brought into contact with the conductive portion 5a, thereby firmly maintaining the conductivity between the meter unit 2 and the wire 3. (See Figure 9)
Moreover, when this electrical conduction is to be canceled, the connection operation member 9 may be returned from the position shown in FIG. 9 to the position shown in FIG. 7.
According to this, at the site where the meter unit (wattmeter) 2 is installed, after attaching the wire 3 to the attachment member 8 of the meter, it is sufficient to simply rotate the connection operation member 9, and use a tool such as a screwdriver or the like. Since no screws are required, operation is extremely simple.

Next, other embodiments of the terminal connection structure for a meter according to the present invention will be described.
FIG. 10 shows an external perspective view of an example of a meter and wire instrument assembly to which the other embodiment is applied, FIG. 11 shows an external perspective view with the cover removed, and FIG. 12 shows the above assembly. FIG. 13 shows an exploded perspective view of the assembly, and FIGS. 14 and 15 show the assembly with the cover removed. 2 shows a plan view before and after the operation. In FIGS. 10 to 15, the same parts as those in FIGS. 1 to 9 are given the same reference numerals, and their explanations will be omitted.

As shown in FIG. 10, the meter assembly 21 includes a meter unit 22 and a plurality of wires 3 attached thereto. When the cover 4 (FIG. 10) is removed, the instrument unit 22 consists of an instrument body 22a and an instrument body frame 22b, as shown in FIG. 12, and there are three horizontally extending straight terminals on each side of the instrument body frame 22b. 23 are fixed with screws 6, respectively.
Reference numeral 24 denotes a wire side terminal consisting of a pair of flat terminals 24A and 24B facing each other vertically, and is electrically fixed to the conductive fitting 3b of the wire 3 with a bolt 25 and a nut 26. (See FIGS. 13 and 16) At this time, as described later, the instrument side terminal 23 is roughly held between the pair of terminals 24A and 24B. (See FIG. 16) This wire side terminal 24 is attached and engaged with a terminal attachment recess 27a of an attachment member 27, which will be described later. Note that this wire side terminal 24 may be a copper plate or may be a flat knitted copper wire having flexibility.
Reference numeral 27 denotes an attachment member for storing and holding the instrument unit 22, and a pair of frame units 29 each having a sliding cam member 28 attached as a part of the connection operation member are attached thereto. As shown in FIG. 16, the sliding cam member 28 has an inclined cam portion 28a.

Reference numeral 30 denotes a pressing shaft member as another part of the connection operation member, and as shown in FIGS. 13 and 16, in order from the top, there is a cam portion 30a, an upper shaft portion 30b, a collar portion 30c, a lower shaft portion 30d, and a claw. It has a section 30e. When the lower shaft portion 30d of the pressing shaft member 30 is housed in the mounting recess 27b of the attachment member 27, the upper shaft portion 30b is inserted into the two tip holes 24a and 24b, 1 of each wire terminal 24. The hole 23a of the two meter side terminals 23, the frame unit 29, and the sliding cam member 28 are penetrated in common and protruded upward. (See FIG. 16) In the case of this embodiment, the connection operation member for connecting the instrument side terminal and the wire side terminal is constituted by the sliding cam member 28 and the pressing shaft member 30.

At this time, as shown in FIG. 16, the pressing shaft member 30 is biased upward by the coil spring 31 fitted to the lower shaft portion 30d, so that the pressing shaft member 30 is pushed between the collar portion 30c and the rib portion 29a of the frame unit 29. , a total of three terminals, one instrument side terminal 23 and two wire side terminals 24, are brought into rough contact with each other with an invisible minute gap. Note that the claw portion 30e of the pressing shaft member 30 functions to prevent the pressing shaft member 30 from coming off when the pressing shaft member 30 is assembled into the mounting recess 27b of the attachment member 27.
Next, the operation of the second embodiment of the terminal connection structure of the meter will be described.
In FIG. 16, when the sliding cam members 28 of the connection operation members 28, 30 are moved and slid in the direction of arrow A, the inclined cam portion 28a engages with the lower surface of the cam portion 30a of the pressing shaft member 30, and is brought to the position shown in FIG. leading to. Then, the pressing shaft member 30 is moved upward by the cam action of the inclined cam portion 28a and the cam portion 30a, together with the biasing force of the coil spring 31. As a result, the three terminals, that is, the one instrument side terminal 23 and the two wire side terminals 24A and 24B, are brought into close contact and electrical connection between the flange portion 30c and the rib portion 29a. Note that the rib portion 29a may be provided on the attachment member 27 in addition to the frame unit 29, and if the instrument body frame 22b also has the function of the attachment member 27 as described later, it may be provided on the instrument body frame 22b.
Moreover, when canceling the conduction, the sliding cam member 28 may be returned from the position shown in FIG. 17 to the position shown in FIG. 16 in the direction of arrow B.
According to this, at the site where the meter unit (wattmeter) is installed, after the wire 3 is attached to the attachment member 27, it is sufficient to simply slide the sliding cam member 28, and use a tool such as a screwdriver or a screw. Since it is not necessary, the operation is extremely simple.

Furthermore, since the other terminal 23 is sandwiched between the pair of terminals 24A and 24B for conduction, it is possible to obtain a more reliable conduction structure compared to a structure in which each terminal simply contacts each other for conduction. Can be done.
Here, in each of the embodiments, the terminal connection structure of the meter of the present invention was applied to a power integrating meter, but it is not limited to this, but it can also be applied to various types of other meters such as an ammeter and a voltmeter. obtain.
In the first embodiment, the connection operation member 9 is rotated in order to conductively connect the terminals, but the invention is not limited to this, and the connection operation member 9 can be pushed, pulled, or slidably You may go. Furthermore, when the connection operation member 9 is rotated, the wire-side terminal 7 is pushed and moved, but this is not limited to this; conversely, the instrument-side terminal 5 is pushed and moved in a direction closer to the wire-side terminal 7. A configuration in which they are in contact may also be used.
Further, in the second embodiment, the terminal 23 on the instrument unit 22 side is composed of one piece and the terminal 24 on the wire side 24 (24A, 24B) is composed of two pieces, but conversely, the terminal 23 on the side of the instrument unit 22 is composed of two pieces. The structure and the wire side terminal 24 may be a single piece structure.
Further, in the second embodiment, the pressing shaft member 30 is moved vertically by slidingly moving the sliding cam member 28 in order to conductively connect the terminals, but the present invention is not limited to this. Instead, the same operation may be performed by rotating the cam member 28.
Further, in the first and second embodiments, the instrument units 2, 22 having the instrument side terminals 5, 23 are housed and held in the attachment members 8, 27 to which the wire side terminals 7, 24 are attached. The configuration was such that connection operating members 9, 28, and 30 attached to terminals 8 and 27 were operated. However, the present invention is not limited to this, and in the first embodiment, the attachment member 8 is not provided at all, and instead, the attachment recess 8a for the wire side terminal of the attachment member 8 is provided in advance on the instrument body frame 2b of the instrument unit 2. It is also possible to provide a configuration equivalent to that of the frame unit 10 to which the connection operation member 9 is attached, and to operate the connection operation member 9 to perform the conduction operation of the terminal. Similarly, in the second embodiment, the attachment member 27 is not provided at all, and instead, the configuration of the mounting recess 27a for the wire side terminal of the attachment member 27 and the connection are made in advance on the instrument body frame 22b of the instrument unit 22. A configuration similar to the configuration of the mounting recess 27b to which the operating members 28 and 30 are attached may be provided, and by operating the connection operating members 28 and 30, the conduction operation of the terminals may be performed. According to this, there is no need to provide separate attachment members 8 and 27, and the number of parts can be reduced.

1, 21... Instrument assembly 2, 22... Instrument unit 2a, 22a... Instrument body
2b, 22b...Instrument main body frame 3...Conductor (wire)
3a...Conducting portion 3b...Terminal fitting 4...Cover 5...Instrument side L-shaped terminal 5a, 7a...Terminal conducting portion 6...Screw 7...Wire side terminal 8...Attachment member 8a...Terminal mounting recess 9, 28, 30...Connection operation Members 9a...Operation part 9b...Flame part 9c...Cam part 10...Frame unit 23...Instrument side straight terminal 23a...Terminal hole 24 (24A, 24B)...Wire side terminal 24a, 24b...Terminal hole 25...Bolt 26...Nut 27... Attachment member 27a... Terminal mounting recess 27b... Mounting recess 28... Sliding cam member 28a... Inclined cam part (28, 30)... Connection operation member 29... Frame unit 29a... Rib part 30... Pressing shaft member 30a... Cam part 30b...Upper shaft portion 30c...Flame portion 30d...Lower shaft portion 30e...Claw portion 31...Coil spring

Claims (6)

A first terminal (23) provided on either the instrument unit (22) side that includes the instrument body (22a) and the instrument body frame (22b) or the wire (3) that conducts to the instrument unit (22). and second and third terminals (24; 24A, 24B) provided on either side are connected by a connection operation member (28, 30),
The first to third terminals (23, 24A, 24B) each extend in the axial direction of the wire, and the second and third terminals (24A, 24B) sandwich the first terminal (23) . located in contact with the first terminal (23) ,
The connection operation member (28, 30) is attached to the instrument body frame (22b) for manual operation, and includes a movable cam member (28) having a cam portion (28a) and movable in a predetermined direction, and a terminal. a terminal pressing member (30) having a pressing portion (30c) and movable in a direction perpendicular to the predetermined direction by being pressed by the cam portion (28a) of the movable cam member (28);
When the moving cam member (28) is operated to move, the terminal pressing member (30) is moved in the orthogonal direction via the cam portion (28a), and the terminal pressing portion (30) of the terminal pressing member (30) is moved. 30c), the second and third terminals (24A, 24B) are moved closer to the first terminal (23) from the contact state and are pressed against the first terminal (23). , instrument terminal connection structure. In the meter terminal connection structure according to claim 1,
The first to third terminals (23; 24A, 24B) are pressed between the terminal pressing portion (30c) of the terminal pressing member (30) and a predetermined portion (29a) of the meter body (22a). A clamped instrument terminal connection structure. The terminal connection structure of a meter according to claim 1 or 2,
The first terminal (23) is provided on the instrument body (22a) side, and the second and third terminals (24A, 24B) are provided on the wire (3) side. structure. A first terminal (23) provided on either the instrument unit (22) side that includes the instrument body (22a) and the instrument body frame (22b) or the wire (3) that conducts to the instrument unit (22). and second and third terminals (24; 24A, 24B) provided on either side are connected by a connection operation member (28, 30),
The first to third terminals (23, 24A, 24B) each extend in the axial direction of the wire, and the second and third terminals (24A, 24B) sandwich the first terminal (23) . located in contact with the first terminal (23) ,
The connection operation member (28, 30) is attached to the attachment member (27) attached to the instrument unit (22) so as to be manually operable, has a cam portion (28a), and is movable in a predetermined direction. a terminal pressing member that has a movable cam member (28) and a terminal pressing portion (30c) and is movable in a direction perpendicular to the predetermined direction when pressed by the cam portion (28a) of the movable cam member (28); (30) and
When the moving cam member (28) is operated to move, the terminal pressing member (30) is moved in the orthogonal direction via the cam portion (28a), and the terminal pressing portion (30) of the terminal pressing member (30) is moved. 30c), the second and third terminals (24A, 24B) are moved closer to the first terminal (23) from the contact state and are pressed against the first terminal (23). , instrument terminal connection structure. In the meter terminal connection structure according to claim 4,
The first to third terminals (23; 24A, 24B) are pressed between the terminal pressing portion (30c) of the terminal pressing member (30) and a predetermined portion (29a) of the meter body (22a). A clamped instrument terminal connection structure. The terminal connection structure of a meter according to claim 4 or 5,
The first terminal (23) is provided on the instrument body (22a) side, and the second and third terminals (24A, 24B) are provided on the wire (3) side. structure.

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