WO2005124372A1

WO2005124372A1 - A compact electrical energy meter

Info

Publication number: WO2005124372A1
Application number: PCT/CN2004/000648
Authority: WO
Inventors: Xingke Lin
Original assignee: Xingke Lin
Priority date: 2004-06-17
Filing date: 2004-06-17
Publication date: 2005-12-29

Abstract

A compact electrical energy meter includes a casing (10), a circuit board and a counter fixed in the casing (10), and joint interfaces (20) fiE54 in the casing (10). Each joint interface (20) is provided with a came interface, a planar terminal (60) for electrical connecting cables, and a line clamp (50) whose main body (52) is mounted around the planar terminal (60). Line clamp (50) is movable by a screw (51) that drives said main body (52) through the operation of an opening of said joint interfaces (20). Said joint interfaces (20) is consisted ~f combined members, so that the cables could be fixed just by a single-screw line clamp, and the size of said joint interface is small, thereby the dimension of the casing is decreased.

Description

Compact Energy Meter

TECHNICAL FIELD The present invention relates to electric energy meters, and in particular, to a compact electric energy meter. BACKGROUND OF THE INVENTION The joints of existing electric energy meters are generally formed by integral injection molding and fixed in a box body by screws or the like, which has a large volume and takes up a large space of the box body, so that the volume of the entire electric energy meter is also large. And this kind of energy meter usually uses two screws to press the cable inserted into the connector, because using only one screw tends to bend the cable, or even break the cable. This structure makes the energy meter's volume cannot be reduced and it takes up space. The connection between the screw and the cable is point contact, and the contact appears unreliable. In addition, the terminals of the existing electric energy meters are linear terminals, and the terminals need to be connected through screws or bolts through a connecting plate. The assembly is troublesome and impractical. SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to provide a compact electric energy meter with a simple structure and a small volume. The technical solution adopted by the present invention to solve its technical problems is to provide a compact electric energy meter, which includes a box body, a circuit board fixed in the box body, a counter, and a split joint fixed in the box body. The split joint is provided with an interface for external cable insertion, a plate-shaped terminal electrically connected to the external cable, and a main body sleeved on the periphery of the plate-shaped terminal. Screws can be driven by the opening operation of the split joint. The main body moves the clamp. The plate-shaped terminal described in the compact electric energy meter includes a linear terminal and an L-shaped terminal, and the L-shaped terminal and an adjacent linear terminal are fixed on a convex post in the box by screws, and are connected with the circuit.

1

Confirm this The board is electrically connected.

The split joint described in the above compact electric energy meter includes a live wire input joint formed by first and second spliced parts joined together by a convex post and a socket tenon, and joined by a raised post and a socket tenon. Of the third and fourth spliced pieces of the hot wire outlet connector, the fifth and sixth spliced pieces of the fifth and sixth pieces joined by the tenon and the socket tenon, and The zero line outlet connector formed by the seventh and eighth pieces joined together by tenon and socket.

A groove or a convex strip is provided on the outer side of the first and eighth pieces of the compact electric energy meter, and the inner wall of the box is provided with a convex strip or a concave which cooperates with the groove or convex strip. groove.

In the compact electric energy meter, the second piece and the third piece are matched together by a convex post and a jack provided on the outer side thereof; the fourth piece and the fifth piece are provided together on the third piece. The outer socket and the convex column cooperate to assemble and fit together; the sixth combined piece and the seventh composite piece cooperate to assemble and fit together through a convex column and a socket provided on the outer side thereof.

The split joint described in the above compact electric energy meter includes a split protection switch, and the third split piece and the fourth split piece that are split with the protection switch and are joined together by a convex post and a socket tenon. The live wire outlet connector is a zero wire inlet connector formed by joining the fifth and sixth pieces joined together by a convex post and a socket tenon, and a seventh piece joined by joining a convex post and a socket by a tenon. The zero line outlet connector formed by the eighth piece.

The protection switch described in the above compact electric energy meter includes a housing composed of split parts, a moving contact installed in the housing, and an overload protection component electrically connected to the moving contact through a conductive belt; the interface is provided in the In the lower part of the housing, the plate-shaped terminal is electrically connected to the moving contact through a manganese copper and a static contact, and the manganese copper provides a power source and a counting pulse signal for the compact electric energy meter through a wire; The side wall of the casing is provided with a wire outlet, and a connection terminal electrically connected to the overload protection component is installed in the wire outlet. The outer sides of the fourth and fifth pieces of the compact electric energy meter may further be provided with through grooves, which are combined to form through holes for screws or bolts to pass through.

The third and sixth pieces of the compact electric energy meter are further provided with two slots parallel to the plate-shaped terminals on the outer side, and the switch control line and pulse output can be inserted in the slots. The copper wire of the signal line is electrically connected, and the signal line is electrically connected to the trip coil of the protection switch through a circuit board.

The box body described in the above compact electric energy meter is pivotally connected above the split joint to a flip cover for protecting the split joint; and above the counter and the circuit board are also provided with screws and the box body A combined box cover; the box body is also provided with two long posts for the counter to be fixed by screws; and a side wall of the box body is also provided with a longitudinal insert groove for longitudinal insertion of the circuit board . 'Compared with the prior art, the split joint of the compact electric energy meter of the present invention is made of split pieces, and the cable only needs to be fixed by a single screw clamp, so that the split joint has a smaller volume, The space is small, so that the volume of the box body can be reduced; and the electrical connection with the cable through the plate-shaped terminal is reliable. In addition, the plate-shaped terminal passing through the neutral line outlet connector is an L-shaped terminal, which is matched with the linear plate-shaped terminal passing through the neutral line inlet connector, and is fixed to the convex post in the box by screws, without the need for additional The connection plate is connected, which reduces the process and is easy to install.

BRIEF DESCRIPTION OF THE DRAWINGS

The compact electric energy meter of the present invention will be further described below with reference to the accompanying drawings and embodiments. In the drawings: FIG. 1 is an exploded schematic diagram of the compact electric energy meter of the present invention.

FIG. 2 is a schematic top view of a split joint of a compact electric energy meter according to the present invention.

FIG. 3 is an exploded perspective view of a live wire inlet connector of the compact electric energy meter according to the present invention.

FIG. 4 is another perspective view of the first and second splicing pieces of the live wire inlet connector of the compact electric energy meter according to the present invention. FIG. 5 is a schematic diagram of the first split piece and the second split piece of the live wire inlet connector of the compact electric energy meter according to the present invention.

FIG. 6 is a schematic diagram of a first split piece and a second split piece of a live wire outlet connector of a compact electric energy meter according to the present invention.

Fig. 7 is a schematic view of the first split piece and the second split piece of the live wire outlet connector of the compact electric energy meter according to the present invention at another angle.

FIG. 8 is a schematic diagram of a first assembling piece of a neutral line input connector of the compact electric energy meter according to the present invention.

FIG. 9 is a schematic view of different angles of the first assembling piece of the neutral wire input connector of the compact electric energy meter according to the present invention.

FIG. 10 is a schematic diagram of a plate terminal of a compact electric energy meter according to the present invention.

Fig. 11 is a schematic diagram of a copper sheet of a compact electric energy meter according to the present invention.

FIG. 12 is a schematic rear view of a case of the compact electric energy meter according to the present invention.

FIG. 13 is a schematic structural diagram of the protection switch of the compact electric energy meter according to the second embodiment of the present invention, omitting a split piece and a mechanical switch assembly.

FIG. 14 is a schematic block diagram of a connection relationship of a protection switch of a compact electric energy meter according to the present invention.

FIG. 15 is a schematic diagram of a split joint of a compact electric energy meter according to a second embodiment of the present invention.

FIG. 16 is another perspective view of the split joint of the compact electric energy meter according to the second embodiment of the present invention. detailed description

The compact electric energy meter of the present invention is described in further detail below with reference to the drawings. 1 to FIG. 12, a first embodiment of a compact electric energy meter according to the present invention is shown. The compact electric energy meter includes a box body 10, a split joint 20, a box cover 30, a flip cover 40, and a counter (not shown). ), Circuit board (not shown).

Referring to FIG. 1 to FIG. 11, the split joint 20 is fixed at the front end of the box body 10, and includes a hot wire inlet connector 21, a hot wire outlet connector 22, a neutral wire inlet connector 23 and a neutral wire outlet connector 24. The hot wire inlet connector 21 is composed of a first splicing piece 21a and a second splicing piece 21b. The first splicing piece 21a is provided with a convex pillar al inside, and the second splicing piece 21b is provided with the convex pillar inside. a mating socket bl (of course, the convex pillar can be provided on the second piece 21b, and the socket can be provided on the first piece 21a), so that the first piece 21a and the second piece 21b can be mutually Tenoning and joining; the first joining member 21a is provided with a dimple a3 with a three-sided opening a2, and the second joining member 21b corresponds to the dimple b3 with a three-side opening b2. When the first joining member 21a and the second joining member When the 21b tenon joint is formed, the recesses a3 and b3 cooperate with each other to form an accommodation space in the hot wire inlet connector 21, and the accommodation spaces are respectively provided with a screw 21 for the entrance of the hot wire cable and a screw for the wire clamp 50 The opening 21d operated by 51 and the outlet 21e through which the flat terminal 60 passes. The plate-shaped terminal 60 passes through the accommodating space from the interface 21c, exits from the outlet 21e, and is electrically connected to the circuit board through a wire. A cable clamp 50 is also provided in the accommodating space, and a frame-shaped body 52 of the cable clamp 50 is sleeved around the plate-shaped terminal 60, and the cable clamp 50 can be tightened or loosened through the opening 21d. The screw 51 is used to drive the main body 52 of the wire clamp 50 to move upward or downward, so as to wrap and clamp or release the live wire cable (not shown) inserted in the interface to contact the plate-shaped terminal 60. Or release contact. The live wire outlet connector 22, the neutral wire inlet connector 23, and the neutral wire outlet connector 24 are also composed of two assembled parts, forming an accommodation space in the joint. The live wire outlet connector 22 is formed by joining the third and fourth pieces 22a, 22b; the neutral wire inlet connector 23 is formed by joining the fifth and sixth pieces 23a, 23b; the zero wire outlet 24 is formed by joining the seventh and eighth assembling pieces 24a and 24b; and the accommodating spaces formed by them are respectively provided with an interface for cable entry, an opening for screw clamp operation, and an exit through the flat terminal. The hot wire inlet connector 21, the hot wire outlet connector 22, the neutral wire inlet connector 23, and the neutral wire outlet connector 24 are sequentially assembled to form a combined connector 20 of the compact electric energy meter of the present invention. Since the split joint 20 is made of split pieces, the cable only needs to be fixed by the wire clamp 50 of a single screw 51, the number and volume of the screws are reduced, and the volume of the split joint 20 is small. The space occupied by the box body 10 is small, so that the volume of the box body 10 can be reduced, so that the entire volume of the compact electric energy meter of the present invention is also small; and the electrical connection between the plate-shaped terminal and the cable is surface contact, making the electrical connection more reliable .

A slot a4 is also provided on the outer side of the first splicing piece 21a of the hot-wire incoming connector 21 and the eighth splicing piece 24b of the zero-wire outgoing connector 24, which can be matched with the convex strip 11 corresponding to the inner wall of the box body 10. The split joint 20 slides into the box body 10. Of course, the slot may be provided on the inner wall of the box body 10, and the convex strip may be provided on the outside of the first and second splicing pieces 21a and 24b to be fixed and matched with each other. A convex post b2 may also be provided on the outer side of the second splicing piece 21b to cooperate with the socket 2al on the outer side of the third splicing piece 22a of the live wire outlet connector 22, so as to match the live wire inlet interface 21 with the live wire outlet interface 22. Put together. Of course, the protruding post may also be provided outside the third assembling piece 22a, and the corresponding insertion hole may be provided on the outside of the second assembling piece 21b. Two slots 2a2 parallel to the plate-shaped terminal 60 are also provided on the outside of the third splicing piece 22a. A copper sheet 70 can be inserted in the slot 2a2, and the copper sheet 70 can be connected with a switch. The control line and the pulse output signal line are electrically connected. Of course, the slot may also be provided on the second assembling piece 21b. A jack 2M is provided on the outer side of the fourth splicing piece 22b of the live wire outlet connector 22, and a fifth splicing piece 23a of the neutral wire incoming connector 23 is provided with a convex post 3al corresponding to the convex post 2bl. In addition, through holes 4b2 and 3a2 may be provided on the outer sides of the fourth and second pieces of combination 22b and 23a to form through holes for screws or bolts to pass through, and fix the combined and spliced joints 20 to each other. Mentioned box body 10. The structure of the fifth piece 23a is symmetric to the fourth piece 22b, the structure of the sixth piece 23b is symmetric to the third piece 22a, and the structure of the seventh piece 24a is second to the second piece 21b is symmetrical, and the structure of the eighth piece 24b is symmetrical to the first piece 21a.

In addition, the plate-shaped terminal 60 passed through the neutral wire outlet connector 24 is an L-shaped terminal, and is matched with the linear plate-shaped terminal 60 passed through the neutral wire inlet connector 23, and is connected with Box The protruding pillars 12 in 10 are fixed and matched in the box body 10 and are electrically connected to the circuit board, thereby eliminating the need for an additional connection board connection, reducing the number of processes and facilitating installation. Of course, the L-shaped terminal may also be provided in the neutral line inlet connector 23, and the corresponding linear plate-shaped terminal is disposed in the neutral line outlet connector 24. The plate-shaped terminals 60 in the hot-wire incoming connector 21 and the hot-wire outgoing connector 22 are connected by manganese copper (not shown) and are electrically connected to the circuit board.

Referring to FIG. 1 and FIG. 12, the box body 10 is provided with four through holes 13 corresponding to the interface 21 c of the split joint 20, so that the cable can be placed in the split joint 20. Above the split joint 20, a flip cover 40 is pivotally connected to the box body 10 to protect the split joint 20, and after the electric energy meter is installed, a varnish is sealed to prevent theft of electricity. The flip cover 40 is provided with a barb, which is matched with the barb 14 provided on the provided box body 10 to buckle. The box body 10 is further provided with two long columns 15 inside, and the counter can be fixed to the long column 15 by screws; a side wall 16 of the box body 10 is also provided, so that The circuit board can be inserted and fixed in the insertion slot 16 in a longitudinal direction. Above the counter and the circuit board is also provided a box cover 30 which is combined with the box body by screws for protecting the components inside the box body 10. A slide groove 17 is also provided on the back of the box body 10, and a buckle 18 is elastically connected to one side of the slide groove 17. When installing the watt-hour meter, pull the hook 18 first, then slide the watt-hour meter into the slide rail pre-installed on the wall or elsewhere, and then release the hook 18 to allow the hook 18 to recover elastically, and the hook is set on the slide rail. In order to further fix the electric energy meter, the lugs 19 of the electric energy meter can also be transmitted by screws to further fix the electric energy meter on the wall.

Please refer to FIG. 13, which shows a second embodiment of the compact electric energy meter according to the present invention. Compared with the first embodiment, the difference lies in that the live wire inlet connector of the split connector of the second embodiment is a protection switch 90, and other structures. It is the same as the first embodiment. The protection switch 90 includes a housing 91, and the housing 91 is formed by combining two assembled pieces 911. The structures of the two assembled pieces 911 correspond to each other to form an accommodation space. An overload protection component is installed in the casing 91 and is electrically connected to one end of the overload protection component through a conductive tape 93. The connected moving contact 94 and the static contact 95 electrically and dynamically connected to the moving contact 94. The lower part of the housing 91 is also provided with an interface 96 for the entry of a live wire, and a plate-shaped terminal 961 is installed in the interface 96, and the plate-shaped terminal 961 is electrically connected to the static contact 95 through manganese copper 97; The manganese-copper 97 supplies power to the circuit board of the compact electric energy meter and a counting pulse signal through a wire passing through the casing 91, and serves as a signal input for counting the compact electric energy meter. An outlet is opened on the side wall of the casing 91, and a plate-shaped connection terminal 98 electrically connected to the other end of the overload protection component is installed in the outlet, and the connection terminal 98 and the live wire of the compact electric energy meter The plate-shaped terminals 60 of the outlet connector 22 are electrically connected to each other, and can be locked on the protruding posts 12 of the box body 10 of the compact electric energy meter by screws. The overload protection component includes an overvoltage protection coil 921, an overcurrent protection bimetal sheet 922, and a mechanical switch assembly (not shown), wherein the overvoltage protection coil 921 and the overcurrent protection bimetal sheet 922 pass through a conductive tape. 93 is connected and mechanically connected with the mechanical switch assembly. When the voltage and current are too large, the over-voltage protection coil 921 and the over-current protection bimetal 922 act, driving the mechanical switch assembly to rotate, thereby driving the contact 94 to rotate to separate from the static contact 95, and disconnecting the electrical connection. To protect it. A cable clamp 50 for clamping an external cable is also provided in the interface 96, and an opening is opened in the housing 91 in a direction perpendicular to the interface 96; when an external firewire cable is placed in the interface 96 , Tighten the screw 51 of the clamp 50 so that the main body 52 of the clamp 50 moves upwards, thereby clamping the external cable for electrical connection with the plate-shaped terminal% 1. The outer side wall of the casing 91 is provided with a groove or a convex strip, which cooperates with the convex strip 11 or the groove of the box body 10 of the compact electric energy meter; the other inner side wall of the casing 91 is further provided with An opening for the signal line controlling the disconnection of the protection switch to enter, providing a trip signal for the trip coil 923 (shown in FIG. 13) inside the protection switch, the signal line and the compact energy meter The copper sheet 70 is electrically connected to the circuit board of the compact energy meter and the remote control computer. When the remote control computer sends out a control signal, it is transmitted to the circuit board 27 through the copper sheet 70. The circuit board 27 generates a disconnect signal (for example

5 volt voltage signal) is transmitted to the protection switch, triggering the trip coil 923 action, driving the machine of the protection switch The mechanical switch assembly rotates, thereby driving the contact 24 to rotate and separate from the static contact 25, and disconnecting the electrical connection, so that remote control power-off can be achieved. Of course, the trip coil 923 can be installed on the outer side of the protection switch housing (as shown in FIGS. 15 and 16).

As shown in FIG. 14, FIG. 15 and FIG. 16, the split joint of the compact electric energy meter of this embodiment includes a protection switch, and the split connection is installed in the compact electric energy meter. The fire wire cable enters through the interface 96 of the protective switch, and the current The plate-shaped terminal 961 flows through the manganese-copper 97, which is electrically connected to the circuit board of the compact energy meter, provides power to the circuit board, and sends a pulse signal to drive the counter action of the compact energy meter; at the same time, the current After passing through the static contact 95, the moving contact 94, through the overload protection component, through the connection terminal 98, the plate-shaped terminal 60 of the live wire outlet interface 22 connected to the connection terminal 98 is sent to the user. Because the protection switch is set in the compact energy meter, the compact energy meter has an automatic protection function for overcurrent and overvoltage.

Claims

Rights request

1. A compact electric energy meter, comprising a box body (10), a circuit board fixed in the box body (10), and a counter, characterized in that it further comprises a splice fixed in the box body (10). A connector (20), wherein the split connector (20) is respectively provided with an interface for inserting an external cable, a plate-shaped terminal (60) electrically connected to the external cable, and a main body (52) is sleeved on the plate-shaped The periphery of the terminal (60) and the screw (51) can drive the main body (52) to move the wire clamp (50) through the opening operation of the split joint (20).

2. The compact electric energy meter according to claim 1, wherein the plate-shaped terminal (60) comprises a linear terminal and an L-shaped terminal, and the L-shaped terminal and an adjacent linear terminal are fixed by screws. The convex post (12) in the box body (10) is electrically connected with the circuit board.

3. The compact electric energy meter according to claim 2, characterized in that the split joint (20) comprises a first split piece (21a) which is doweled by a tenon (al) and a socket (bl). The hot-wire inlet connector (21) formed by joining with the second piece (21b), and the third piece (22a) and the fourth piece (22b) made by joining together by a convex post and a socket. The live wire outlet connector (22), the neutral wire inlet connector (23) formed by joining the fifth and sixth pieces (23a) and (23b) joined together by a tenon and a jack joint. The zero line outlet connector (24) formed by joining the seventh piece (24a) and the eighth piece (24b) which are tenoned with the socket.

4. The compact electric energy meter according to claim 3, wherein a groove (a4) or a convex strip is provided on an outer side of the first piece (21a) and the eighth piece (24b), and The inner wall of the box body (10) is provided with a convex strip (11) or a groove matched with the groove or convex strip.

5. The compact electric energy meter according to claim 3, wherein the second split piece

(21b) cooperate with the third piece (22a) through a convex post (b2) and an insertion hole (2al) provided on the outer side thereof; the fourth piece (22b) and the fifth piece ( 23a) by placing on its outside The sixth inserting piece (23b) and the seventh inserting piece (24a) cooperate with each other through the convex post and the jack provided on the outer side of the sixth inserting piece (23b) and the convex post (3al).

6. The compact electric energy meter according to claim 1, wherein the split joint comprises a split protection switch, and the first and second protection switches that are split into the protection switch and are connected by a convex post and a socket tenon. The hot-wire outlet connector (22) formed by combining the three pieces (22a) and the fourth piece (22b), and the fifth piece (23a) and the sixth piece (23b) which are joined by a tenon and a socket. ) The neutral line inlet connector (23) formed by splicing and the zero line outlet connector (24) composed of the seventh splicing piece (24a) and the eighth splicing piece (24b) spliced by the convex post and the socket tenon. ).

7. The compact electric energy meter according to claim 6, characterized in that the protection switch comprises a housing (91) formed by splitting, a moving contact (94) installed in the housing (91), An overload protection component electrically connected to the moving contact (94) through a conductive tape (93); the interface (96) is provided at the lower part of the casing (91), and the plate-shaped terminal (961) is made of manganese The copper (97) and the static contact (95) are electrically connected to the moving contact (94), and the manganese copper (97) provides power for the compact electric energy meter and a counting pulse signal through a wire; The side wall of the body (91) is provided with a wire outlet, and a connection terminal (98) electrically connected to the overload protection component is installed in the wire outlet.

8. The compact electric energy meter according to claim 5 or 6, characterized in that a through groove (2b2) can be further provided on the outer side of the fourth split piece (22b) and the fifth split piece (23a), Splice to form a through hole (25) through which a screw or bolt passes.

9. The compact electric energy meter according to claim 7, characterized in that, the outer side of the third split piece (22a) and the sixth split piece (23b) is further provided in parallel with the plate-shaped terminal (60). The two slots (2a2) are provided, and a copper sheet (70) electrically connected to the switch control line and the pulse output signal line can be inserted in the slot (2a2), and the signal line is connected with the circuit board through a circuit board. The trip coil (923) of the protection switch is electrically connected.

10. The compact electric energy meter according to claim 8, characterized in that said box body (10) is pivotally connected above said split joint (20) with a flip cover (40) for protecting said split joint; A box cover (30) that is combined with the box body (10) by screws is also provided above the counter and the circuit board; the inside of the box body (10) is also provided for the counter to pass through screws The two fixed columns (15) are fixed; the side wall of the box body (10) is further provided with a longitudinal insertion groove (16) for longitudinal insertion of the circuit board.