CN212433229U - Electric meter - Google Patents

Abstract

The utility model relates to an ammeter, include table lid and the base that arranges in proper order backward from the past, the table lid is established on the base, and table lid and base enclose to be provided with the circuit board in the space that closes, have the metal contact that is connected with the live wire on the circuit board, its characterized in that: a conductive member for conducting electricity from an external portion entering the watch to the outside is at least partially enclosed in the watch case, and the conductive member is electrically connected to the metal contact on the circuit board. When external static electricity enters through a gap between the base and the meter cover, the conductive piece is close to the gap, the static electricity is preferentially transmitted to the corresponding position of the nearest conductive piece, the conductive piece is electrically connected with the metal contact on the circuit board, the metal contact leads to a live wire, and finally the static electricity is led out to the outside of the electric meter, so that an electric element in the electric meter cannot be damaged by the static electricity; the conductive piece adopts a conductive cover, when static electricity hits the front wall plate of the meter cover or the side wall plate of the meter cover, the static electricity can be conducted away, and the structural design of the electric energy meter is more reasonable.

Description

Electric meter

Technical Field

The utility model particularly relates to an ammeter.

Background

The existing electric meters are all of plastic shell structures, and various electric appliance elements such as buttons and the like, circuit boards and the like are arranged in the electric meters.

If the applicant previously applied for the chinese utility model patent having patent number ZL201820917020.9 and publication number CN208399573U, "a counter electric energy meter", the disclosed counter electric energy meter includes a base and a circuit board arranged on the base, and is characterized in that: one side of the base is provided with a supporting piece for supporting the circuit board, and the other side opposite to the supporting piece is clamped and fixed with the circuit board through a clamping structure.

If the patent number that applicant previously applied for was ZL201820917676.0 again, the chinese utility model patent of granted bulletin number CN208399574U "a meter electric energy meter", the meter electric energy meter of disclosing is including base and the lid that can dismantle the formula setting on the base, be provided with PCB board and meter on the base, the medial surface downwardly extending of lid is useful for increasing the dado between lid top surface and the meter, and the up end of base is seted up and is supplied dado male slot. The existence of dado has increased the height of lid to the antimagnetic distance of lid and PCB board has been increased, the PCB board setting is between wiring end sub-frame and meter counter, then has increased the antimagnetic distance between lid medial surface and the meter counter simultaneously, improves the antimagnetic effect of electric energy meter.

However, because the base and the cover of the electric meter are both plastic parts, and the anti-interference capability of electrical components such as various chips and a counter on the circuit board is poor, when external static electricity enters the electric meter through a gap between the cover and the base and is transmitted to the inside of the whole electric meter under the action of an air medium, the electric meter can be halted or a display screen is blacked, so that the risk of electricity stealing is caused, and even various components in the electric meter can be damaged.

Therefore, further improvements to existing electricity meters are needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to the current situation of above-mentioned prior art, provide one kind and will get into outside static conductance in the table to the table outside, in order to reach the protection table in the ammeter components and parts purpose.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides an ammeter, includes table lid and the base that arranges in proper order from preceding back, the table lid is established on the base, just be provided with the circuit board in the space that table lid and base enclose to close, the metal contact that is connected with the live wire has on the circuit board, its characterized in that: a conductive member for conducting an external electrical signal entering the watch to the outside of the watch is at least partially enclosed within the watch case, the conductive member being electrically connected to the metal contacts on the circuit board.

The conductive piece can be in the form of a conductive protection wall and a conductive protection cover, and preferably, the conductive piece is partially covered on the circuit board which is partially positioned between the conductive protection cover and the base.

The conductive protection cover has various structural forms, and preferably, the conductive protection cover comprises a front guard plate arranged side by side with a front wall plate of the meter cover, side guard plates bent towards the base direction are arranged at the left side edge and the right side edge of the front guard plate, and the side guard plates are arranged side by side with the left side plate and the right side plate of the meter cover. Thus, the side guard plate can conduct the external static away when the external static electricity is shocked to the left side wall and the right side wall of the meter cover.

In order to realize the installation of offside backplate, the two inside walls of the left and right sides of table lid have the second clamp plate that extends to the base direction, seted up on the side guard plate and dodged the second of second clamp plate dodges the hole, seted up on the second clamp plate and supplied the first spacing groove that the corresponding position of side guard plate was inserted and is established, the side guard plate is local to be inserted and to be located corresponding first spacing inslot and spacing inboard at the table lid.

Preferably, the outer surface of the front panel of the watch cover is provided with an accommodating cavity which is recessed towards the base and is used for accommodating the module, the circuit board is locally positioned behind the accommodating cavity, and the lower end of the conductive protection cover is positioned between the circuit board and the accommodating cavity and is arranged on the back of the accommodating cavity.

In order to realize the detachable fixation of the side guard plate, the lower edge of the side guard plate is provided with a bending plate which extends backwards and downwards, and the bending plate is clamped and fixed with the back surface of the accommodating cavity.

The clamping is fixed in various forms, if a buckle is arranged on the bending plate, correspondingly, a buckling hole is formed in the accommodating cavity, other forms can be adopted, preferably, the buckling plate is provided with the buckling hole, correspondingly, a clamping part is arranged on the top surface of the accommodating cavity, and the bending plate is arranged on the back surface of the accommodating cavity through the clamping matching of the clamping part and the corresponding buckling hole.

Preferably, the longitudinal section of the bending plate is L-shaped, and comprises a transverse plate and a vertical plate, the back surface of the accommodating cavity is provided with a positioning column extending towards the base, correspondingly, the vertical plate is provided with a positioning hole matched with the positioning column in an inserting manner, and the bending plate is positioned on the back surface of the accommodating cavity through the inserting cooperation of the positioning column and the positioning hole.

In order to realize that electrically conductive safety cover is connected with the metal contact electricity on the circuit board, both ends wherein at least one end has downwardly extending's extension board about the riser, it is connected with the shell fragment to have on the extension board, have the portion of bending that extends to the circuit board direction on the shell fragment, bend the portion for with the elastic contact of the metal contact looks electricity on the circuit board electrically conductive safety cover is in under the state that finishes of installation, elastic contact with metal contact on the circuit board offsets.

When external static electricity is shocked to the top plate of the meter cover, the upper guard plate can conduct away the static electricity on the top plate and prevent the external static electricity from diffusing to the inside of the electric meter to damage an internal electric element, the upper edge of the front guard plate is provided with the upper guard plate extending towards the direction of the base, and the upper guard plate and the top plate of the meter cover are arranged in parallel.

In order to realize the installation of the upper guard plate, a first pressing plate extending towards the base direction is arranged on the inner side wall of the top plate of the meter cover, a first avoidance hole for avoiding the first pressing plate is formed in the upper guard plate, a first limiting groove for inserting the corresponding position of the upper guard plate into the first pressing plate is formed in the first pressing plate, and the part of the upper guard plate is inserted into the corresponding first limiting groove and limited in the inner side of the meter cover.

In order to realize the firm installation of electrically conductive safety cover, have on the base towards the table lid direction extension, be used for supporting electrically conductive safety cover's first backup pad, electrically conductive safety cover part is located between first backup pad and the first clamp plate.

Compared with the prior art, the utility model discloses an at least local encirclement has the outside electric conduction to the table outside that will get into in the table lid of ammeter, so, after outside static got into through the gap between base and the table lid, electric conduction was nearer apart from the gap, so, static is preferred to be transmitted to the corresponding position of nearest electric conduction, electric conduction is through being connected with the metal contact electricity on the circuit board, the metal contact lead wire is to the live wire, finally derive static to the outside of ammeter, then, the electric component in the ammeter will not be destroyed by static; the conductive piece adopts a conductive cover covered on the circuit board, when static electricity hits the front wall plate of the meter cover or the side wall plate of the meter cover, the static electricity can be conducted away, and the structural design of the electric energy meter is more reasonable.

Drawings

Fig. 1 is a sectional view of a part of the structure of a first embodiment of the present invention;

fig. 2 is a cross-sectional view of another angle according to a first embodiment of the present invention;

FIG. 3 is a schematic view of the structure of FIG. 1 from another angle;

FIG. 4 is a schematic view of a portion of the structure of FIG. 1;

FIG. 5 is a schematic perspective exploded view of FIG. 4;

FIG. 6 is a schematic view of the structure of FIG. 4 at another angle;

FIG. 7 is a schematic view of the structure of FIG. 6 at another angle;

FIG. 8 is a schematic structural diagram of a watch cover according to the first embodiment;

FIG. 9 is a schematic structural diagram of a base in the first embodiment;

fig. 10 is a schematic structural view of a conductive protection cover according to the first embodiment;

FIG. 11 is a schematic view of the structure of FIG. 10 at another angle;

fig. 12 is a sectional view of a second embodiment of the present invention;

fig. 13 is a cross-sectional view of another angle according to the second embodiment of the present invention;

FIG. 14 is a schematic view of the conductive retaining wall of FIG. 12 with the conductive retaining wall removed;

fig. 15 is a partial schematic structural view of a second embodiment of the present invention;

FIG. 16 is a cross-sectional view of FIG. 15;

FIG. 17 is a schematic view of a portion of the structure of FIG. 15;

FIG. 18 is a perspective exploded view of a portion of the structure of FIG. 15;

fig. 19 is a schematic structural view of a watch cover according to a second embodiment of the present invention;

fig. 20 is a schematic structural view of a base according to a second embodiment of the present invention;

fig. 21 is a schematic structural view of a conductive retaining wall according to a second embodiment of the present invention;

fig. 22 is a schematic view of the structure of fig. 21 at another angle.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

The first embodiment is as follows:

as shown in fig. 1 to 11, it is a first embodiment of the present invention. The utility model discloses the ammeter includes table lid 1 and the base 2 of arranging in proper order from preceding back, and table lid 1 lid is established on base 2, and is provided with circuit board 3 in the space that table lid 1 and base 2 enclose to close, and at least part surrounds the electrically conductive piece outside having the outside conductance to the table that will get into in the table lid 1, and electrically conductive piece adopts aluminum plate's form, and electrically conductive piece is connected with the metal contact looks electricity on the circuit board 3.

As shown in fig. 2, 4 and 5, the conductive member is a conductive protective cover 7 partially covering the circuit board 3, the circuit board 3 is partially located between the conductive protective cover 7 and the base 2, and an electric element (not shown) is disposed in an area enclosed between the conductive protective cover 7 and the circuit board 3. As shown in fig. 10 and 11, the conductive protection cover 7 includes a front guard plate 71 arranged side by side with the front wall plate of the cover 1, side guard plates 72 bent toward the base 2 are provided at both left and right side edges of the front guard plate 71, and the side guard plates 72 are arranged side by side with the left and right side plates of the cover 1; the upper edge of the front guard plate 71 has an upper guard plate 74 extending in the direction of the base 2, and the lower edge of the side guard plate 72 has a bent plate 73 extending rearward and downward.

In order to facilitate the installation of the side guard plates, the left and right inner side walls of the watch cover 1 are both provided with second pressing plates 13 extending towards the base 2, and correspondingly, the side guard plates 72 are provided with second avoiding holes 721 avoiding the second pressing plates 13, as shown in fig. 8, the second pressing plates 13 are provided with second limiting grooves 131 for inserting the corresponding positions of the side guard plates 72, and the side guard plates 72 are partially inserted into the corresponding second limiting grooves 131 to be limited at the inner sides of the watch cover 1, as shown in fig. 6 and 7.

In addition, as shown in fig. 1 to 4 and 10, the base 2 has a second supporting plate 22 extending toward the bezel 1 for supporting the circuit board 3, the second supporting plate 22 is disposed adjacent to the inner sidewall of the base 2, and the second supporting plate 22 has a connecting plate 23 connected to the corresponding inner sidewall of the base 2 for supporting the side guard plate 72, and the side guard plate 72 is partially located between the second pressing plate 13 and the connecting plate 23 in the mounted state of the conductive protection cover 7, as shown in fig. 2. In order to facilitate the circuit board clamping, as shown in fig. 4 and 9, an extension plate 221 is disposed on one side of the second support plate 22, a buckle 222 is disposed on a side wall of the extension plate 221 facing the circuit board 3, and correspondingly, a bayonet 31 for clamping and matching with the buckle 222 is disposed on the circuit board 3, so that the circuit board 3 is mounted on the base 2 by the clamping and matching of the buckle 222 and the bayonet 31, which is specifically shown in fig. 2 and 9. To facilitate the mounting of the upper guard, as shown in fig. 3 and 4, the upper guard 74 is arranged side by side with the top plate 15 of the cover 1. For the insertion of the upper protection plate, as shown in fig. 5, the inner side wall of the top plate 15 of the watch cover 1 is provided with a first pressing plate 12 extending towards the base 2, as shown in fig. 10, the upper protection plate 74 is provided with a first avoiding hole 741 avoiding the first pressing plate 12, the first pressing plate 12 is provided with a first limiting groove 121 for inserting the corresponding position of the upper protection plate 74 therein, and the upper protection plate 74 is partially inserted into the corresponding first limiting groove 121 and limited at the inner side of the watch cover 1, as shown in fig. 6; the base 2 has a first support plate 21 extending toward the bezel 1 for supporting an upper guard plate 74 of the conductive protective cover 7, and the conductive protective cover 7 is partially located between the first support plate 21 and the first presser plate 12. The first support plate 21 is connected with a third support plate 24 for supporting the circuit board 3, the front edge of the third support plate 24 is located in front of the first support plate 21, a slot for inserting the rear edge of the upper guard plate 74 is formed by the third support plate 24, the first support plate 21 and the top plate 15 of the cover, and the upper guard plate 74 is located between the first pressing plate 12 and the first support plate 21 when the conductive protection cover 7 is in the installed state, as shown in fig. 2 and 4.

In order to facilitate the installation of the bending plate, the outer surface of the front wall plate of the watch cover 1 is provided with an accommodating cavity 11 recessed towards the base 2 for accommodating the module, the local part of the circuit board 3 is located behind the accommodating cavity 11, and the bending plate 73 of the conductive protection cover 7 is located between the circuit board 3 and the accommodating cavity 11 and is clamped and fixed on the back of the accommodating cavity 11, as shown in fig. 4. Specifically, the longitudinal section of the bending plate 73 is L-shaped, and includes a horizontal plate 731 and a vertical plate 732, the horizontal plate 731 of the bending plate 73 is provided with a fastening hole 7311, correspondingly, the top surface of the accommodating cavity 11 is provided with a clamping portion 112, and the bending plate 73 is mounted on the back surface of the accommodating cavity 11 by the clamping fit of the clamping portion 112 and the corresponding fastening hole 7311, as shown in fig. 7. In addition, in order to align the snap-in portion and the fastening hole accurately, the back surface of the accommodating cavity 11 has a positioning column 111 extending toward the base 2, correspondingly, a vertical plate 732 has a positioning hole 7321 formed thereon and engaged with the positioning column 111, and the bending plate 73 is positioned on the back surface of the accommodating cavity 11 by engaging the positioning column 111 with the positioning hole 7321, as shown in fig. 2.

As shown in fig. 7, the vertical plate 732 has extending plates 733 extending downward at both left and right ends thereof, the extending plates 733 have spring pieces 734 connected thereto, the spring pieces 734 have bent portions 7341 extending toward the circuit board 3, the bent portions 7341 are elastic contacts electrically connected to the metal contacts on the circuit board 3, and the elastic contacts are abutted against the metal contacts on the circuit board 3 in a mounted state of the conductive protection cover 7. The circuit board 3 is a PCB, so that the elastic contact of the conductive protection cover 7 is connected to the metal contact on the circuit board 3, and the metal contact on the circuit board 3 is led to the live wire to conduct away the static electricity on the conductive protection cover 7. In addition, the existence of shell fragment and elastic contact can be in the prepressing hand of elastic contact department, let the contact of electrically conductive safety cover 7 and circuit board reliable and stable more.

As shown in fig. 3, 6 and 7, the front wall of the cover 1 is provided with a button 6, the button 6 has a key post 61 extending toward the base 2, the cover 1 is provided with a mounting hole 141 for inserting the key post 61, the end of the key post 61 is sleeved with a key sleeve 62, the key sleeve 62 is provided with a carbon film 611 contacting with a conductive film at a switch position on the circuit board 3 on a surface facing the circuit board 3, the conductive protective cover 7 is provided with a connecting ring 75 for passing the key post 61, and the connecting ring 75 is located between the cover 1 and the key sleeve 62, which is specifically shown in fig. 1. Specifically, the inner side of the front wall plate of the bezel 1 has a convex pillar 14 extending toward the base 2, as shown in fig. 8, a mounting hole 141 is formed through the convex pillar 14 along the length direction thereof, a limiting convex rib 142 is convexly provided on the peripheral wall of the convex pillar 14, and the connection ring 75 is located between the limiting convex rib 142 and the key sleeve 62, as shown in fig. 3.

In this embodiment, get into the back through the gap between base and the table lid when outside static, electrically conductive safety cover covers establishes on the circuit board, so electrically conductive safety cover is nearer apart from the gap, so, static is preferred to be transmitted to nearest electrically conductive safety cover on the corresponding position, electrically conductive safety cover is connected through the metal contact electricity with on the circuit board, the metal contact lead wire is to the live wire on, finally derive static to the outside of ammeter, so, the electric elements in the ammeter will not destroyed by static, above-mentioned electrically conductive safety cover can reach the static that prevents 35 kV.

Directional terms such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the present invention, but these terms are used herein for convenience of description only and are determined based on example orientations shown in the drawings. Since the embodiments disclosed in this embodiment can be arranged in different directions, these directional terms are for illustration purposes only and should not be construed as limiting, for example, "up" and "down" are not necessarily limited to directions opposite to or coincident with the direction of gravity.

Example two:

fig. 12 to 22 show a second embodiment of the present invention.

The structure of the watch cover, the base and the button in this embodiment is the same as that in the first embodiment, and details will not be repeated in this embodiment, and the difference between this embodiment and the first embodiment is as follows:

the conductive member has different structures, the conductive member of the present embodiment is a conductive guard wall 5, specifically, as shown in fig. 12, 21 and 22, the conductive guard wall 5 is annular, the conductive guard wall 5 includes two first guard plates 51 arranged side by side left and right, the two first guard plates 51 are vertically arranged and extend front and back, a second guard plate 52 is connected between the lower ends of the two first guard plates 51, the upper ends of the two first guard plates 51 are connected through a third guard plate 53, in addition, the conductive guard wall 5 is provided with a connection ring 54 for a key post 61 to pass through, and the connection ring 54 is located between the watch cover 1 and the key sleeve 62, specifically, see fig. 13. In order to facilitate the installation of the conductive protective wall on the inner side of the watch cover, as shown in fig. 17, 18, 21 and 22, the first protective plate 51 is provided with a first strip-shaped hole 511 avoiding the second pressing plate 13, the first protective plate 51 is partially inserted into the corresponding second limiting groove 131 of the second pressing plate 13 and limited on the inner side of the watch cover 1, as shown in fig. 12 to 14 and 20, and when the conductive protective wall 5 is in the installed state, the first protective plate 51 is partially located between the second pressing plate 13 and the connecting plate 23.

As shown in fig. 17, the second protection plate 52 includes a middle protection plate 520 extending horizontally from left to right and extension arms 5201 extending downward from both left and right ends of the middle protection plate 520, the back of the accommodating cavity 11 has positioning posts 111 extending toward the base 2, there are two positioning posts 111, correspondingly, two positioning holes 5212 mating with the positioning posts 111 are disposed on both the two extension arms 5201 of the second protection plate 52, the second protection plate 52 is positioned on the back of the accommodating cavity 11 by mating the positioning posts 111 with the first positioning holes 5212, and the extension arms 5201 are connected with elastic pieces 522 having elastic contacts, the elastic pieces 522 have elastic contacts 5221 electrically connected with the metal contacts on the circuit board 3.

As shown in fig. 21 and 22, the third guard plate 53 includes an intermediate plate 531 arranged side by side with the top plate 15 of the front cover 1, and both ends in the longitudinal direction of the intermediate plate 531 are connected to the front edges of the first guard plates 51 on the corresponding sides by bent plates 532, respectively. The third guard plate 53 is inserted into the first limiting groove 121 and limited on the top plate 15 of the watch cover. The third support plate 24, the first support plate 21 and the top cover plate 15 are enclosed to form a slot 200 for inserting the rear edge of the third guard plate 53 therein, and when the conductive guard wall 5 is in the mounted state, the third guard plate 53 is located between the first pressure plate 12 and the first support plate 21, as shown in fig. 12 and 14.

In this embodiment, after external static electricity enters through the gap between the base and the cover, the conductive retaining wall is closer to the gap, so that the static electricity is preferentially transmitted to the corresponding position of the nearest conductive retaining wall, the conductive retaining wall is electrically connected with the conductive part on the circuit board, the conductive part is led to the live wire, and finally the static electricity is led out to the outside of the electric energy meter, so that the electric elements in the electric energy meter cannot be damaged by the static electricity, and the conductive retaining wall can prevent the static electricity of 35 kV.

Directional terms such as "front", "rear", "left", "right", "side", "top", "bottom", and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the present invention, but are used herein for convenience of description only and are determined based on example orientations shown in the drawings. Because the disclosed embodiments of the present invention can be arranged in a variety of orientations, these directional terms are used for purposes of illustration only and should not be construed as limiting.

Claims (12)

1. The utility model provides an ammeter, includes table lid (1) and base (2) that arrange in proper order from preceding back, table lid (1) lid is established on base (2), just table lid (1) and base (2) are provided with circuit board (3) in the space that closes that encloses, its characterized in that: the cover (1) is at least partially surrounded by a conductive element for conducting an external current into the watch to the outside, said conductive element being electrically connected to the metal contacts on the circuit board (3).

2. An electricity meter in accordance with claim 1, wherein: the conductive piece is partially covered on a conductive protective cover (7) on the circuit board (3), and the circuit board (3) is partially located between the conductive protective cover (7) and the base (2).

3. An electricity meter in accordance with claim 2, wherein: electrically conductive safety cover (7) include with preceding backplate (71) that the leading wall board of table lid (1) was arranged side by side, the left and right sides border of preceding backplate (71) all have to side guard plate (72) that base (2) direction was buckled, side guard plate (72) with the left and right sides board of table lid (1) is arranged side by side.

4. An electricity meter in accordance with claim 3, wherein: the utility model discloses a table lid, including table lid (1), two inside walls have second clamp plate (13) to base (2) direction extension about table lid (1), seted up on side guard plate (72) and dodged the hole (721) are dodged to the second of second clamp plate (13), seted up on second clamp plate (13) and supplied side guard plate (72) correspond the position and insert first spacing groove (121) of establishing, side guard plate (72) are local to be inserted and to be located corresponding first spacing groove (121) and spacing the inboard of table lid (1).

5. An electricity meter in accordance with claim 3, wherein: the surface of the front wall plate of the watch cover (1) is provided with an accommodating cavity (11) which is sunken in the direction of the base (2) and is used for accommodating the module, the local part of the circuit board (3) is positioned behind the accommodating cavity (11), and the lower end of the conductive protection cover (7) is positioned between the circuit board (3) and the accommodating cavity (11) and is arranged on the back of the accommodating cavity (11).

6. An electricity meter in accordance with claim 5, wherein: the lower edge of the side protection plate (72) is provided with a bending plate (73) which extends backwards and downwards, and the bending plate (73) is fixedly clamped with the back of the accommodating cavity (11).

7. An electricity meter in accordance with claim 6, wherein: the bending plate (73) is provided with a buckling hole (7311), correspondingly, a clamping part (112) is arranged on the top surface of the accommodating cavity (11), and the bending plate (73) is installed on the back surface of the accommodating cavity (11) through the clamping matching of the clamping part (112) and the corresponding buckling hole (7311).

8. An electricity meter in accordance with claim 6, wherein: the longitudinal section of bending plate (73) is L shape, including diaphragm (731) and riser (732), have on the back of holding chamber (11) to base (2) direction extension reference column (111), correspondingly, set up on riser (732) with reference column (111) looks grafting complex locating hole (7321), bending plate (73) pass through the grafting cooperation of reference column (111) and locating hole (7321) and fix a position on the back of holding chamber (11).

9. An electricity meter in accordance with claim 8, wherein: at least one of the left end and the right end of the vertical plate (732) is provided with an extension plate (733) extending downwards, the extension plate (733) is provided with a spring plate (734), the spring plate (734) is provided with a bending part (7341) extending towards the direction of the circuit board (3), the bending part (7341) is an elastic contact electrically connected with a metal contact on the circuit board (3), and when the conductive protection cover (7) is in an installation completion state, the elastic contact is abutted to the metal contact on the circuit board (3).

10. An electricity meter in accordance with claim 3, wherein: the upper edge of the front guard plate (71) is provided with an upper guard plate (74) extending towards the base (2), and the upper guard plate (74) is arranged in parallel with the top plate of the meter cover (1).

11. An electricity meter in accordance with claim 10, wherein: have on the inside wall of table lid (1) roof to first clamp plate (12) that base (2) direction extends, seted up on last backplate (74) and dodged first dodge hole (741) of first clamp plate (12), seted up on first clamp plate (12) and supplied the corresponding position of going up backplate (74) inserts first spacing groove (121) of locating in it, go up backplate (74) local insert locate corresponding first spacing groove (121) in and spacing the inboard of table lid (1).

12. An electricity meter in accordance with claim 11, wherein: the base (2) is provided with a first supporting plate (21) which extends towards the direction of the watch cover (1) and is used for supporting the conductive protective cover (7), and the conductive protective cover (7) is locally positioned between the first supporting plate (21) and the first pressing plate (12).

Images