CN109164284B

CN109164284B - Compact watch

Info

Publication number: CN109164284B
Application number: CN201810983677.XA
Authority: CN
Inventors: 徐鹤还
Original assignee: Individual
Current assignee: Shenzhen Longdian Electric Co ltd; Shenzhen Longdian Huaxin Holding Group Co ltd
Priority date: 2015-09-08
Filing date: 2015-09-08
Publication date: 2021-02-23
Anticipated expiration: 2035-09-08
Also published as: CN109164284A; CN105203813B; CN105203813A

Abstract

The invention discloses a compact meter, which is formed by mutually splicing a body and a bearing seat electrically isolated from the body, wherein a metering function part is arranged in the body, and the body is connected into a corresponding slot of an external bearing seat in a plugging manner through a plug arranged on the back side of the body. In one embodiment, the socket has a mutual inductor assembly and a power taking circuit, and samples and converts the alternating current of the power line into the direct current and provides the direct current to the body through the slot; the metering function part is only provided with a sampling circuit, a metering circuit, a singlechip, a communication circuit and a direct current conversion circuit, receives a sampling signal provided by the slot, and converts direct current into working voltage for the singlechip and the communication circuit. In another embodiment, the bearing seat is provided with a wiring groove for conducting the power line of the power grid and a mutual inductor assembly connected to the wiring groove, and the metering function part is provided with a power taking circuit, a sampling circuit, a metering circuit, a single chip microcomputer and a communication circuit.

Description

Compact watch

Technical Field

The invention relates to plug-in type power acquisition equipment, in particular to plug-in type acquisition electric meters or distribution transformer terminal equipment, and belongs to the technology of a power grid power system.

Background

An electric power collection device, such as an electric meter, is a device for reading the power consumption behavior and accumulated amount of a power consumption user in the power supply of a power grid or a business department. In a general technique, an electric meter or a distribution transformer terminal is installed in a meter box in the open air in a concentrated manner. An electric meter is a body part of the electric meter formed by mutually enclosing a shell and a base, and a power line is connected in and out of a zero line and a live line through a terminal box designed in the body part to form a metering link in a load loop. In order to save the internal space, the terminal box is usually installed on one side of the body, on one hand, the wiring loop is saved, and on the other hand, the strong electric part is far away from other circuit boards in the body and possible electromagnetic interference.

Along with the continuous improvement of the power grid technology, the complexity of the functions and the electrical performance of the meter enables more and more devices such as internal circuit boards, and then the volume of the body is continuously increased, so that the design space and the electrical isolation design of the meter are influenced.

Disclosure of Invention

The invention improves the structure of the current ammeter or the distribution transformer acquisition terminal again, reduces and simplifies the design of the conventional ammeter body, and designs the structure of the ammeter in a pluggable mode, thereby being convenient to replace, maintain and use.

On one hand, the main body structure of the electric meter is mainly formed by splicing 3.3V-5V electric components, for example, the electric meter can be integrated on a PCB circuit board and is mainly used for realizing the basic metering calculation function and the remote communication function of the electric meter. Accordingly, a conductive path is designed in the socket cooperating with the body structure, and the configuration of the conductive path can be various, including an input/output line formed by a side-by-side neutral wire N, a side live wire L and a possible ground wire E. Meanwhile, a transformer coil for inducing alternating current change is arranged on the line, and an isolation transformer assembly (for example) is connected with the transformer coil and is used for converting the alternating current on the line into low-voltage direct current (for example, 12A-15A), so that a sampling circuit can directly acquire a voltage and current signal in the low-voltage direct current.

On the other hand, according to the needs of power vary voltage, the inside design of body gets the electric subassembly, gets the electric subassembly and can not set up in the bearing as required, mainly sets up winding displacement groove and mutual-inductor subassembly in the bearing, and in order to switch on or cut off the electric power route in the winding displacement groove, sets up and can control its electric power break-make with the plug mode in the dress process of connecing.

In order to achieve the above effects, the present invention adopts the following technical means: the compact meter is formed by mutually splicing a body and a bearing seat which is electrically isolated from the body, wherein the metering function part is arranged in the body, and the body is connected into a corresponding slot of an external bearing seat in a plugging manner through a plug arranged on the back side of the body. The bearing seat has: the mutual inductor component is connected between the power line of the power grid and a user load electrically and is used for sensing the variable quantity of the alternating current signal on the power line; and the electricity taking circuit is connected with the mutual inductor assembly and used for converting the alternating current of the power line into the direct current and providing the direct current to the body through the slot. The metering function portion has: a sampling circuit electrically connected to at least a portion of the plug for sensing current and voltage signals introduced into the body ac power line; the metering circuit is connected with the sampling circuit to read current and voltage signals for integral operation; the single chip microcomputer is electrically coupled with the metering circuit to process the integral operation value; the communication circuit is electrically connected with the singlechip; and a DC conversion circuit for converting the DC supplied from the slot into a working voltage for the single chip microcomputer and the communication circuit.

As an effect, the body structure can be electrically isolated from the socket portion through the housing or other known accessories, in the general electric meter technology, a shielding metal cover is usually used to effectively isolate a transformer or a mutual inductor from a metering function portion to achieve electromagnetic compatibility (EMC). On the basis, the body can be designed to be more compact, so that the PCB layout design space can be increased.

In a refinement, the plug has, independently of one another: a first plug (or pin) for obtaining current and voltage signals from a portion of the socket; and the second plug is used for obtaining the direct current for power supply from the other part of the slots.

The technical scheme 2 is as follows: the electric plug-in metering equipment is formed by mutually splicing a body and a bearing, wherein an electric function part is arranged in the body, and the body is connected into a corresponding slot of an external bearing in a plug-in mode through a plug arranged on the back side of the body. The bearing seat has: the wiring groove is used for forming an electric conduction path between a power line of a power grid and a user load; and the mutual inductor component is connected with the wiring groove and is electrically connected with the slot for sensing the variation of the alternating current signal on the power line. The electrical function portion has: the power taking circuit acquires the alternating current on the electric conduction path through the plug to convert the alternating current into direct current; the sampling circuit is electrically connected to the plug and is used for inducing current and voltage signals of an alternating current power line led into the electrical plug-in metering equipment body; the metering circuit is connected with the sampling circuit to read current and voltage signals for integral operation; the single chip microcomputer is electrically coupled with the metering circuit to process the integral operation value; and the communication circuit is electrically connected with the singlechip.

In a refinement, the plug has, independently of one another: the first plug is used for obtaining alternating current from a part of the slots; and a second plug for blocking at least part of the conductive path of the busway within the socket; or the movable connecting plate is used for being inserted into the second bayonet part and pressing down the movable connecting plate to conduct the wire arrangement groove in the bearing seat. In another effect, considering the arrangement of the relay or the breaker assembly in the electric meter, the on and off of the electric meter can be realized by using the plugging and unplugging of the wiring groove and the plug in the embodiment of the invention, the additional arrangement and cost required by separately installing the relay are replaced, and the installation is easier.

In another improvement aspect, a first bayonet part and a second bayonet part are arranged in the slot, the first bayonet part is composed of an input side bayonet part connected with a power line end of a power grid and an output side bayonet part connected with a user load end of the power grid, which are arranged in pairs, and the first bayonet part and the second bayonet part are embedded in corresponding bayonet mounting plates in the slot.

Wherein each first bayonet element has attached a hook-like projection for snapping into the body after the body has been mounted in place in the socket.

Further, the bearing seat is internally provided with: the bearing plate is used for bearing the second bayonet part and lifting the height of the second bayonet part to be higher than the height of the plane of the first bayonet part, so that the second plug and the second bayonet part are contacted firstly; and a movable connecting plate arranged in the bearing seat, wherein an elastic abutting part is arranged between the movable connecting plate and the bottom of the bearing seat, so that the movable connecting plate has an initial position coplanar with the extension part of the hook-shaped protruding part between the bottoms of the bearing seat. In this initial position, the hook-like projection is in a horizontal position. Preferably, the hook-like projection is fixed to a threading shaft so that the hook-like projection is screwed along the fixing axis with the threading shaft.

Furthermore, the bottom of the movable connecting plate is provided with an electric contact, and when the second plug continuously presses the movable connecting plate until the through linkage shaft is limited at the second clamping position, the electric contact is inserted into an electric contact groove in the wire arrangement groove, so that the wire arrangement groove is conducted. Furthermore, the electrical contacts are electrically connected to the first bayonet members, thereby conducting the two first bayonet members on the input side and the output side. As an effect, the wire arranging groove is not conducted before the body is installed, and only after the conductive contact element at the bottom of the movable connecting plate is pressed down to the contact groove in the wire arranging groove, the first bayonet part electrically contacted with the conductive contact element is conducted simultaneously, so that the body is installed more simply and conveniently.

And meanwhile, the bottom of the movable connecting plate is further provided with a locking hook, the bottom of the bearing seat is provided with a pair of transversely arranged locking movable buckles, the tail ends of the parts, extending towards the inside of the bottom of the bearing seat, of the locking movable buckles are respectively provided with a locking buckle, and the locking hook is clamped on the locking buckles so that the movable connecting plate is locked at the bottom of the bearing seat and the hook-shaped protruding part is further locked in the second fracture position. When an installer needs to detach the body, the movable connecting plate can be loosened and restored to the initial position under the tension of the elastic abutting part only by pressing the two clamping and locking movable buckles in the direction of the bearing seat, and then the hook-shaped protruding part is automatically linked to the horizontal position.

As an improvement of the above technical solutions, the mounting plate of the socket extends into at least a portion of another socket, wherein the bayonet mounting plate is fixed by being engaged with each other after being spliced by the contact boundaries of the two sockets. As another effect, the installation of the bayonet fitting is more flexible and convenient, since the conventional socket is configured such that the bayonet fitting is directly fixed to the conductive wire by means of screws or welding, which is disadvantageous to the maintenance and replacement of the socket. When a generally large current flows through the conductive circuit in the socket, accumulated damage is easily caused at the socket jack due to occasional arc effects or incorrect plugging modes, and easy replacement of the socket element can be realized through the bayonet mounting mode of the invention.

Drawings

FIG. 1 is a schematic view of a detachable structure of the plug-in metering device of the present invention;

FIG. 2 is a schematic view of the insertion and installation of a first bayonet fitting at the bottom of an electricity meter socket according to the present invention;

FIG. 3 is a schematic view of the insertion mounting of a second bayonet member at the bottom of the electricity meter socket according to the present invention;

FIG. 4 is a schematic view of the present invention showing the installation of an electricity meter in an electrical box;

FIG. 5 is a functional block diagram illustrating the structure of a first embodiment of the electricity meter according to the present invention;

FIG. 6 is a schematic cross-sectional view of an electric meter socket according to the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the invention is mainly improved by the following steps:

1. the electric meter structural body 1 (shown in figure 1) is designed in a compact mode. The electrical function of which is defined by a signal acquisition PCB circuit board inside the body. In which the terminal box or terminal of the neutral N/live L is not arranged in the body, while the terminal part is arranged outside the watch body or can be directly replaced, for example on the back side as shown in fig. 2, which is designed in the form of an electrically conductive plug 11. In one embodiment, the size of the plug (or referred to as the blade electrical connection portion) 11 may be different from the size and angle of the plug and socket, and the blade 11 may be thicker and longer in size for achieving smaller internal resistance and more stable electrical contact, and may be designed as tinned copper material, so as to enable a tighter electrical contact between the blade 11 and the socket after the blade 11 and the socket reach a fixed melting point due to the temperature generated by the internal resistance after the electrical contact with the socket 2.

From the embodiment of fig. 2, the number of plugs/blades 11 can be four for a single-phase watch, and six or more for other smart watches. Because the simplification of inner structure, the volume of body 1 can accomplish very big degree to shrink, for example distinguish from the outer structure, and the body can be divided into the display segment 13 that fig. 3 shows, communication segment 12 and signal acquisition section 14 (under general condition, communication end 12 can directly set up at the top of body 1, then can be according to the requirement of communication rule at the body top opening, makes things convenient for the different communication module of selective dismouting). For example, since the terminal box is a contact terminal for a higher AC voltage of 220V to 380V, a crimping conductive member having a large volume and a space isolation design are adopted in the design of the contact, and the internal space of the meter can be greatly simplified if this part is omitted.

2. The electric meter equipment is assembled in a plugging mode. The side view of fig. 2 illustrates the single-phase electric meter body 1 shown in fig. 1 and the socket 2 configured to fit therewith (the basic shape of the socket 2 is not limited to a circle, but is for convenience of illustration only, and the housing portion is omitted, and only the key components are illustrated). The body 1 has first plugs 11 at its bottom side for being electrically plugged into corresponding four slots (not shown) of the socket 1, and the socket 2 is electrically connected between the grid power line and the grid consumer load.

According to the above improved object, as a first embodiment of the present invention, a compact single-phase watch is composed of a body 1 and a socket 2 electrically isolated from the body. The electric meter metering function part is arranged in the body 1, and the body 1 is connected to a corresponding slot of the external bearing in a plug-in mode through a plug 11 arranged on the back side of the body.

With further reference to fig. 1 to 5, the socket 2 has: a transformer assembly 211 (e.g., a current/voltage transformer winding) received between the grid power line and the user load, electrically connected to the socket, for sensing a variation of the ac signal on the power line; and a power taking circuit 212 connected to the transformer assembly 211, for converting the power line ac to dc and supplying the dc to the main body 1 through the slot.

The metering function portion has: a sampling circuit 111 electrically connected to at least a portion of the plug, for sensing current and voltage signals introduced into the body ac power line; a metering circuit 113 connected to the sampling circuit to read the current and voltage signals for integration; a single chip 114 electrically coupled to the metering circuit to process the integrated operation value; a communication circuit 115 electrically connected to the single chip microcomputer; and a dc conversion circuit 112 for converting the dc power supplied from the slot into a +3.3V operating voltage to be supplied to the single chip microcomputer 114 and the communication circuit 115.

As a second embodiment of the present invention, in an electrical plug-in metering apparatus, a socket 2 has: a busway slot 28 for forming a 220V electrical conduction path between the grid power line 100 and a customer load; and a transformer assembly 211 connected to the wire arrangement slot 28 and electrically connected to the slot for sensing the variation of the ac signal on the power line.

The electrical function portion has: the electricity taking circuit 212 acquires the alternating current on the electric conduction path through the plug to convert the alternating current into the direct current; a sampling circuit 111 electrically connected to the plug 11 for sensing current and voltage signals of an ac power line introduced into the electrical plug-in metering device body 1; a metering circuit 113 connected to the sampling circuit to read the current and voltage signals for integration; a single chip 114 electrically coupled to the metering circuit to process the integrated operation value; and a communication circuit 115 electrically connected to the single chip.

In any of the above embodiments, a bayonet member is provided in each slot, and the shape of the bayonet may be the shape shown in the figure or other shapes convenient for fastening a plug. The bayonet members include a

first bayonet member

21a, 21b, 22a or 22b, and a second bayonet member 26. These first bayonet elements are formed by input-side bayonet elements 21a, 21b arranged in pairs and bayonet elements 22a, 22b connected to the load side of the network users. The bayonet elements are fitted in corresponding bayonet mounting plates 23 in the slots. Preferably, the first and second bayonet members are configured differently from each other, or the positions of the first and second bayonet members may be interchanged.

In the first embodiment of the present invention, the first bayonet elements include input-side bayonet elements 21a and 21b for providing sampling voltage and current inputs for a sampling circuit in the main body 1 and output-side bayonet elements 22a and 22b for providing output paths of the voltage and current, and the second bayonet element 26 serves as an interface for providing dc voltage to a dc conversion circuit in the main body 1. According to the second embodiment of the present invention, the first bayonet elements are composed of input-side bayonet elements 21a, 21b connected to the grid power line terminals and output-side bayonet elements 22a, 22b connected to the grid consumer load terminals, which are arranged in pairs, and the second bayonet elements 26 serve as on-off switches for the bus ducts 28. Any one of which is fitted in a corresponding bayonet mounting plate 23 in the slot.

Taking the bayonet 21a as an example, a plurality of metal slots are formed in the mounting plate 23, and the bayonet 21a can be inserted into the bayonet mounting plate 23 shown in fig. 1 along the H direction as shown, and then the other end thereof is pushed toward the bayonet mounting plate 23 by the other mounting plate 25 along the H direction as well to thereby clamp the bayonet 21a in the socket 2. Similarly, the second bayonet member 26 is mounted in the same manner. For each bayonet element, the shape of which can be designed to the shape shown in the figure, i.e. similar to the structural relationship between the plug and the socket, the watch body 1 is inserted into the socket 2 along the longitudinal direction P downwards to realize the electric conduction.

In a further development, the mounting plate 25 of the socket 2 extends over at least a part of the other socket, wherein the bayonet mounting plates 23 are snap-fitted together by the contact boundaries of the two sockets 2. Referring to fig. 4, the mounting plate 25 extends to or is part of another socket, and the sockets 2 need to be secured in batches within a meter box or electrical cabinet. In order to realize the removal or replacement of the bayonet elements after the body 1 is removed from the mounting plates 25, a spacing space is provided on one mounting plate 25 so that a portion of the mounting plate 25 can be removed against the surface mounting direction (H direction) of the socket 2 (for example, in fig. 3, the mounting plate 25 is centrally provided with a spacing space dividing the mounting plate into two equal area portions for clamping the bayonet elements), whereas in the present embodiment, the mounting plate 25 and the bayonet mounting plate 23 can be locked by a wire lead seal after the contact splicing.

Referring to fig. 1, each first bayonet element has a hook-like projection with a projecting part 24 extending outwardly of the bayonet mount as shown and an upwardly extending barbed end part 241 at the end of this projecting part 24 for snapping into the body 1 after the body 1 has been mounted in place in the socket 2.

Referring again to fig. 2 and 3, further, each of the bayonet members has a press-down type elastic contact portion 261 therein, configured to: after being contacted and pressed down by the plug, the hook-like projection is caused to create a

first breaking point

242 or 243 in the extension between the bottom portions of the bayonet elements, wherein the breaking created in the bottom portion of the first bayonet element 21a pushes the barb tip portion 241 at the end of the projection 24 to hook into the second breaking point 15 in the body 1. As a supplementary example, the second breaking position 15 can be used as an assembling point of the body 1, that is, the second breaking position 15 divides the body 1 into two mutually enclosed parts, namely, the top shell 18 and the bottom shell 17, the barb projection 241 clamps the bottom shell 17, and the top shell 18 and the bottom shell 17 can be fixed by means of lead sealing split.

Referring to fig. 4, a bus bar slot 28 is further provided through the interior of the housing 2. electrical contacts are received at each end of the bus bar slot 28 as connection to the line and load terminals of the electrical grid L, N, respectively. For example, the bus duct 28 has an input 27a and an output 27b connected to the side of the grid power line 100 at both ends. In a preferred embodiment, either the output 27b or the input 27a is designed as a replaceable component, so that different power lines can be routed as desired in the bus duct 28. The bus duct 28 connects the bayonet members 21a (fig. 3) to 22b, and once the plug 11 is inserted into the bayonet members 21a, a resilient contact portion 261 is provided in the bayonet members 21a, which communicates with the bus duct 28 for electrical conduction when the plug 11 presses down on the resilient contact portion.

For example, in accordance with the spirit of the second embodiment of the present invention, second plug 16 is designed to be a non-conductive material for blocking the ac conduction path within bus duct 28, and a bypass switch, for example, is provided between bus duct 28 and first bayonet element to be turned on upon insertion of plug 16 into bayonet element 26. And a power taking circuit is arranged in the body 1 and obtains power through the first bayonet piece. According to the spirit of the first embodiment of the present invention, the second plug 16 is used as a dc power-taking component, and accordingly, the second bayonet member 26 is not directly connected to the bus duct 28, but a power circuit is provided to convert 220V ac power into 12V dc power and then directly supply the dc power to the electric board in the main body 1, without a switching function. Meanwhile, a mutual inductor and a transformer assembly are also arranged between the first bayonet part and the wire arranging groove, and the alternating current variable in the power line 100 or the wire arranging groove 28 is induced into a chip readable electric signal variable, so that the current/voltage value of the variable is reduced through the transformer and is transmitted to the single chip microcomputer for reading.

Referring to fig. 2 and 3, in a modified aspect of the first embodiment, the plug 11 has: a first plug 11 corresponding to the first bayonet members 21a to 22b for taking current and voltage signals from a part of the socket (i.e., mainly from the bayonet members); and a second plug 16 corresponding to the second bayonet member 26 for taking a direct current of the power supply 12A (for example) from another part of the above-mentioned slots. If the plug is configured in a blade-like manner, the bayonet elements can be configured in an outwardly-inwardly-tightened configuration as shown in fig. 3, whereas if the plug is in the form of a conventional copper sheet or pin, the bayonet elements can be designed in the form of inwardly-tightened spring strips as shown in fig. 2 in order to achieve stable electrical contact. In a further development of the second embodiment, the plug has, independently of one another: a first plug 11 corresponding to the first bayonet members 21a to 22b for taking 220V ac power from the first bayonet members; and a second plug 16 corresponding to the second bayonet part 26 for blocking the conductive path of the bus duct 28 in the socket 2 and instead providing current/voltage to the four first bayonet parts 21a to 22b from the bypass.

According to the first or second embodiment of the present invention, the method of installing such a single-phase electric meter comprises:

step 1, providing a body 1 and a bearing seat 2 matched with the body 1, installing a single-layer electric plate in the body 1 as a metering function part of a meter, arranging a plurality of leading-out ends on the single-layer electric plate to connect a first plug 11, arranging a slot matched with the plug in shape in the bearing seat 2, wherein first bayonet parts 21 a-22 b are arranged in the slot and connected with a wire arranging slot 28 in the bearing seat 2, and the wire arranging slot 28 is connected with a power line 100 of a power grid;

step 2, pressing down the body 1 to the bearing seat 2 along the direction P to enable the first plug 11 to be in complete electric contact with the first bayonet piece;

step 3, by pressing down (for example) the elastic contact portion 261 provided in the first bayonet part 21a by the first plug 11, the barb-like protruding portion 241 at the end of the protruding portion 24 creates a

first breaking position

242 or 243 at the extending portion of the bayonet part 21a between the bottoms of the sockets 2, wherein the breaking created at the bottom of the first bayonet part 21a pushes the barb tip 241 at the end of the protruding portion 24 to hook into the second breaking position 15 in the body 1, wherein the barb tip 241 is used for catching the bottom shell 17 of the body 1:

and 4, fixing a single-layer electric board in the bottom shell part 17 of the body 1, or installing multiple layers of electric boards according to different requirements, installing the top shell 18 on the bottom shell 17, and fastening by using lead sealing.

In one example, the second plug 16 is disposed on the back side of the body 1 (not shown in fig. 1 because of the shielding), and as shown in fig. 2 and 3, the plug 11 and the plug 16 are disposed orthogonally to each other, so that the corresponding socket bayonet elements 26 on the socket 2 are disposed in a transverse direction and the bayonet elements 21a, 21b, etc. are disposed in a longitudinal direction. The definition of transverse and longitudinal is defined in terms of flex grooves 28. As shown in fig. 4, only one lead 100 is designed in the meter box/electrical cabinet, and the remaining cables 28 are respectively and hung on the lead, so that the cables are horizontal and normally correspond to the use direction of table 1.

As a modification, the bayonet elements have in turn a second bayonet element 26, the positions of the first and second bayonet elements being orthogonal to one another as a correspondence. In the first embodiment described above, the voltage variation signal from the bus duct 28 is obtained by the

first bayonet pieces

21a and 22a, and the current variation signal from the bus duct 28 is obtained by the first bayonet pieces 21b and 22b, for the electric power integration operation of the single chip microcomputer; a dc current is supplied to the single layer circuit board via the second bayonet 26. In the second embodiment described above, the second bayonet part 26 is first inserted through the second plug 16 to block the current path in the bus duct 28, power is transmitted to, for example, the first bayonet part 21a through the conductive bypass switch, and the induced alternating current variable is then supplied to the body 1 through the first bayonet part 21 a.

Preferably, the plug 16 cannot be normally removed after being inserted into the bayonet member 26, as shown in fig. 3, which has a sectional configuration different from that of the bayonet member 21a, etc., as a fixing means, if the plug 16 is pressed downward, the barb-like projection 24 of the bayonet member 21a in the socket 2 is still on the surface of the socket 2, and similarly to the bayonet member 21a, a resilient contact portion 261 is also provided therein.

When this elastic contact portion 261 is pressed down, a first breaking point 242 or 243 (action shown in fig. 2 or 3) is created by a conductive connection at the bottom of the two bayonet elements 26 (inside the socket 2), i.e., by the in-box extension of the protruding element 24. In one aspect, the distal end 241 of the projecting element 24 is a raised inward extension that will snap into a second break location 15 on the body of the watch 1 when fully moved to the P-upright position; on the other hand, the flat cable 28 is connected to the bayonet elements 26, and when the watch body 1 is inserted and the first breaking position occurs, the longitudinal path between the two bayonet elements 26 that are originally orthogonal to the flat cable 28 is cut off, so that the bayonet elements 21a and 21b are connected, and the slot 21a and the like can be prevented from being connected without any reason.

The second breaking point 15 can be produced as a way of disassembling the body 1. In a foreseeable example, the body 1 may be provided, in its portion below the breaking point 15, with a signal acquisition circuit board for the dedicated connection of external electrical components and for the sampling and parametric calculation of the AC electrical signals generated on the electrical circuit. In a general example, a plurality of layers of electric boards are usually disposed inside the watch, and a display board corresponding to the display section 13 and a communication board corresponding to the communication section 12 may be disposed on the upper side of the plane of the fracture site 15.

In addition, the signal acquisition section 14 inside the meter body 1 can adopt a non-transformer mode, such as a patch RC mode, and meanwhile, other acquisition equipment can be installed on the bearing seat 2 instead of being dedicated to an electric meter.

According to the second embodiment of the invention, each bayonet element in turn has an elastic contact portion 261 configured to: after being contacted and pressed down by the plug, the hook-shaped protruding part 24 generates a first breaking position 242 at the extension part between the bottoms of the first bayonet pieces, pushes the tail end 241 of the hook-shaped protruding part to be hooked and clamped in the second breaking position 15 in the body, and cuts off the path between the

bayonet pieces

21a and 22a for blocking the electrical conduction of the bus duct so as to form a conductive path between the bus duct and each bayonet piece.

Referring to the cross-sectional view of the socket shown in fig. 6, in the second embodiment of the present invention, the bayonet mount plate 23 in the socket 2 has:

a receiving plate 29 receiving the second bayonet member 26 for raising the height of the second bayonet member 26 to be higher than the height of the plane on which the first bayonet member 21a and the like are located so that the second header 16 and the second bayonet member 26 are first brought into contact; and

a flexible connecting plate 292 is provided in said housing 2, between the flexible connecting plate 292 and the bottom of the housing 2, a resilient abutment 295, for example a spring, is provided, which has an initial position coplanar with the extension of the hooking protrusion 24 between the bottom of the housing 2, i.e. in the position shown in fig. 6 in phantom at the top of the housing 2, in which said hooking protrusion 24 is in a horizontal position. While the solid line of fig. 6 shows the movable structure during the process of inserting the second plug 16 into the socket 2, the main movable parts in the figure are the movable connecting plate 292 and the hook-shaped protrusion 24 linked therewith.

Preferably, the hook-like projection 24 is fixed to a threading axis Z1, so that the hook-like projection 24 is screwed in the axial direction R1 or R2 with this threading axis Z1. For example, can be rotated anywhere between the two end positions depicted in phantom in fig. 6. A threading axis Z1 separates the hook-like projection 24 into a visible portion outside the socket 2 and a portion extending along the bottom of the socket.

Further, the movable connecting plate 292 has two sliding through grooves 294 perforated in the horizontal plane, a through-linking shaft Z2 is inserted into each of the two sliding through-grooves 294 in a transverse direction (i.e., orthogonal to the direction H in fig. 1), and the through-linking shaft Z2 movably fixes the hooked projection 24 to the movable link plate 292 at the end of the bottom extension of the housing 2, and as the movable link plate 292 is pressed down by the second connector 16, due to the dragging action of the through linkage shaft Z2 and the fixed rotation action of the hook-shaped protruding part 24 by the threading shaft Z1, the visible part of the hook-shaped protruding part 24 outside the bearing seat 2 can rotate upwards according to the axial direction R1 and is finally clamped at the second breaking position 15 in the body 1, at the same time, the through-link shaft Z2 is constrained within the sliding through-groove 294 and slides only along the sliding through-groove 294 from the first (or initial) locking position a to the second (or final) locking position B. At the same time, the extension of the hooked projection 24 into the socket 2 in its original horizontal position presents a first breaking point 242. For example, if the breaking position does not occur and the two hook-shaped projections 24 are received in a straight line as a whole (as shown in fig. 6), the bus bar groove 28 is blocked by it and does not constitute a conductive path. Preferably, the hooked projection 24 is made of a non-conductive material.

In a preferred embodiment, the width of the through groove 294 is equal to or slightly greater than the cross-sectional diameter of the linkage shaft 294.

According to the spirit of this embodiment, the above-mentioned interlocking action is recoverable due to the elastic interference member 295. That is, when the person who installs the meter needs to take out the body 1, the above process is reversible, and the hook-shaped projection 24 returns to the original horizontal position. Meanwhile, the height of the receiving plate 29 needs to be slightly higher than the surface of the socket 2 where the other bayonet members 21a and the like are located, in consideration of the length of the hook-shaped projection 24 and the deformation space margin.

Further, the bottom of the movable connecting plate 292 is provided with an electrical contact 291, and when the second plug 16 continuously presses the movable connecting plate 292 until the through linkage shaft Z2 is limited to the second blocking position B, the electrical contact 291 is inserted into an electrical contact 293 in the cable groove 28, so as to conduct the cable groove 28. Further, the electric contacts 291 electrically connect the

first bayonet members

21a and 22a, thereby conducting both the first bayonet members on the input side and the output side in the H direction.

Preferably, the bottom of the movable connecting plate 292 is further provided with a locking hook 296, the bottom of the seat 2 is provided with a pair of laterally arranged locking movable buckles 299, each of the ends of the extending portions of the locking movable buckles 299 into the bottom of the seat 2 is provided with a locking buckle 297, and the locking hook 296 is clamped in the locking buckle 297, so that the movable connecting plate 292 is locked at the bottom of the seat 2, and the hook-shaped protruding portion 24 is further locked in the second breaking position 15.

According to this embodiment, when the installer needs to detach the body 1, the movable connection plate 292 will be released and will be returned to the original position by the tension of the elastic interference member 295 by pressing the two locking movable buckles 299 toward the receiving seat, and the hook-shaped protrusion 24 will be automatically linked to the horizontal position. In a preferred embodiment, in order to provide good contact force for the snap action buckle 299, a resilient member 298 may be provided therebetween to enhance the use effect.

According to a second embodiment of the invention, a method for loading and unloading such a single-phase electric meter comprises:

the installation method comprises the following steps: step 1, providing a body 1 and a bearing seat 2 matched with the body 1, installing a single-layer electric plate in the body 1 as a metering function part of a meter, arranging a plurality of leading-out ends on the single-layer electric plate to connect a first plug 11, arranging a slot matched with the plug in shape in the bearing seat 2, wherein first bayonet parts 21 a-22 b are arranged in the slot, and pressing the body 1 to the bearing seat 2 along the P direction to ensure that the first plug 11 is completely electrically contacted with the first bayonet parts;

step 2, pressing down, for example by means of the second plug 16, the elastic contact portion 261 provided in the second bayonet element 26, so that the barb-like projection 241 at the end of the projection 24 creates a first breaking point 242 at the extension of the bayonet element 21a between the bottoms of the socket 2, the visible portion of said barb-like projection 24 outside the socket 2 being able to screw upwards in the axial direction R1 into the second breaking point 15 finally clipped into the body 1;

step 3, when the second plug 16 continuously presses the movable connecting plate 292 until the through linkage shaft Z2 is limited at the second blocking position B, the electrical contact 291 is inserted into the electrical contact groove 293 in the bus duct 28, so as to conduct the bus duct 28, and the electrical contact 291 is electrically contacted with the

first bayonet parts

21a and 22a, so as to conduct the two

first bayonet parts

21a and 22a, or 21B and 22B on the input side and the output side in the H direction;

step 4, respectively arranging a locking buckle 297 at the tail end of the part of the locking movable buckle 299 extending towards the bottom of the bearing seat 2, wherein the locking buckle 296 is clamped on the locking buckle 297, so that the movable connecting plate 292 is locked at the bottom of the bearing seat 2, fixing a single-layer electric board in the bottom shell part 17 of the body 1, or installing multiple layers of electric boards according to different requirements, installing the top shell 18 on the bottom shell 17, and fastening the top shell 18 by lead sealing;

the disassembling method comprises the following steps: step 5, removing the threading lead seal;

step 6, removing the mounting plate 25 or at least a portion thereof, pressing two opposite snap-lock movable buckles 299 therein toward the bearing seat 2, releasing the movable connecting plate 292 and returning to the initial position under the tension of the elastic interference member 295, so that the hook-shaped protrusion 24 is automatically linked to the horizontal position, thereby ejecting the body 1 through the second socket 26.

Wherein, a locking buckle 297 is respectively arranged at the end of the part of the locking movable buckle 299 extending into the bottom of the seat 2, and the locking hook 296 is locked to the locking buckle 297, so that the movable connecting plate 292 is locked to the bottom of the seat 2, and the hook-shaped protruding part 24 is locked in the second breaking position 15. When the latch 297 is pressed, the latch hook 296 is automatically released.

The above are merely preferred examples of the present invention, and are not intended to limit the technical gist of the present invention, and various embodiments thereof may be substituted or preferred. Also, the communication circuit 15 may be designed to be external to the main body 1, or the structure of the

elastic member

295 or 298 may be more specific and optimized.

The drawings are only for highlighting the characteristics and effects, and the actual size or proportion is not completely equivalent to that of a physical product and is only used for representing a descriptive representation. The invention is claimed in the protection scope of the appended claims.

Claims

1. Compact meter, by the body with its electrically isolated bearing split each other the constitution, wherein measurement function part sets up in the body, the body is connected to the corresponding slot of outside bearing through the plug formula that its dorsal part set up in, its characterized in that, the bearing has:

the mutual inductor component is connected between the power line of the power grid and a user load electrically and is used for sensing the variation of the alternating current signal on the power line; the power taking circuit is connected with the mutual inductor assembly and used for converting the alternating current of the power line into the direct current and providing the direct current to the body through the slot;

the metering function portion has only:

a sampling circuit electrically connected to at least a portion of the plug for sensing current and voltage signals introduced into the body ac power line; the metering circuit is connected with the sampling circuit to read current and voltage signals for integral operation; the single chip microcomputer is electrically coupled with the metering circuit to process the integral operation value; the communication circuit is electrically connected with the singlechip; the direct current conversion circuit converts the direct current provided by the slot into working voltage supplied to the singlechip and the communication circuit;

the plug has independently arranged:

a first plug for obtaining current and voltage signals from a portion of the socket; and

the second plug is used for obtaining direct current for power supply from the other part of the slots;

at least part of the slots are internally provided with bayonet pieces, and each bayonet piece consists of an input side bayonet piece and an output side bayonet piece which are arranged in pairs, wherein the bayonet pieces are embedded in corresponding bayonet mounting plates in the slots.

2. The compact watch of claim 1 wherein each of said bayonet elements has a hook-like projection for snapping into said body after said body is mounted in place in the socket.