CN111157773A

CN111157773A - Counter capable of displaying current month electricity for ammeter

Info

Publication number: CN111157773A
Application number: CN202010224996.XA
Authority: CN
Inventors: 张启航
Original assignee: Tiantai Wanfeng Electronics Co ltd
Current assignee: Tiantai Wanfeng Electronics Co ltd
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2020-05-15

Abstract

A counter for electric meter can display the current month electricity consumption; this device includes the main part case, be equipped with the downside band pulley chamber of longitudinal symmetry in the main part case, downside band pulley chamber outside intercommunication is equipped with the count chamber, count chamber front side intercommunication is equipped with open-ended display chamber forward, count chamber rear side intercommunication is equipped with the transmission wheel chamber, count chamber right side is equipped with the upside band pulley chamber, upside band pulley chamber right side is equipped with the motor with main part case fixed connection, thereby it rotates to drive upside count wheel numerical value automatic zero clearing to start driving the plectrum through the electro-magnet, after three side count wheels all zero clearing in the left side, right side three sides count wheel all clear, actuation magnet and the automatic reset of tightening piece, thereby realize the automatic zero clearing of upside count wheel monthly, thereby guarantee that the count wheel of both sides about the top and bottom measures total power consumption of record and power consumption in the month respectively, no longer need to record the reading of.

Description

Counter capable of displaying current month electricity for ammeter

Technical Field

The invention relates to the related technical field of electric meters, in particular to a counter capable of displaying the current month electricity consumption for an electric meter.

Background

The ammeter is that every family has the installation and is used for the device of measurement record power consumption, and common domestic ammeter is the one-way ammeter of illumination at present, and the figure that shows on the one-way ammeter of illumination is the total power consumption after the ammeter begins to work, but the resident cares about is the power consumption of this month usually, and ordinary one-way ammeter can't record this month power consumption, can only use last month numerical value to subtract the power consumption of this month to obtain the power consumption of this month indirectly, and on the one hand is comparatively loaded down with trivial details, and on the other hand most residents do not have the custom of recording the ammeter numerical value.

Disclosure of Invention

Aiming at the technical defects, the invention provides a counter for an electric meter, which can display the current monthly electricity consumption and can overcome the defects.

The invention relates to a counter capable of displaying the current monthly electricity for an electric meter, which comprises a main body box, wherein a lower side belt wheel cavity which is symmetrical up and down is arranged in the main body box, the outer side of the lower belt wheel cavity is communicated with a counting cavity, the front side of the counting cavity is communicated with a display cavity with a forward opening, the rear side of the counting cavity is communicated with a transmission wheel cavity, the right side of the counting cavity is provided with an upper side belt wheel cavity, a motor fixedly connected with the main body box is arranged on the right side of the upper side belt wheel cavity, a rear side belt wheel cavity which is positioned on the upper side of the lower side belt wheel cavity and extends backwards is arranged between the upper side belt wheel cavity and the upper side counting cavity, a centrifugal wheel cavity positioned at the rear side of the upper counting cavity is arranged at the left side of the rear side belt wheel cavity, a connecting plate cavity communicated with the transmission wheel cavity at the upper side leftwards is communicated with the rear side of the centrifugal wheel cavity, the connecting plate cavity front side is communicated with a sliding block cavity which is communicated with the transmission wheel cavity leftwards and is positioned on the left side of the centrifugal wheel cavity.

On the basis of the technical scheme, the upper belt wheel cavity comprises a driving shaft, the driving shaft is connected with the right end face of the power cavity in a rotating fit manner, the driving shaft extends leftwards into the power cavity and rightwards into the lower belt wheel cavity, a first belt wheel positioned in the lower belt wheel cavity is fixedly connected to the driving shaft, a first transmission belt is connected between the first belt wheels in a power fit manner, the upper driving shaft extends leftwards to penetrate through the lower belt wheel cavity and the upper belt wheel cavity and then is fixedly connected with the left end face of the motor, a second belt wheel fixedly connected with the upper driving shaft is arranged in the upper belt wheel cavity, a tensioning block cavity positioned between the lower belt wheel cavity and the rear belt wheel cavity is communicated with the left side of the upper belt wheel cavity, a magnetic tensioning block is connected in a sliding fit manner in the tensioning block cavity, and a first stretching spring is fixedly connected between the left end face of the magnetic tensioning block and the left end wall of the tensioning block cavity, the upper side belt wheel cavity is communicated with the right side of the upper side belt wheel cavity, an attraction cavity corresponding to the tightening block cavity is formed in the upper side of the attraction cavity, an attraction magnet cavity is formed in the upper side of the attraction cavity in a communicated mode, an electromagnet is fixedly connected into the upper end wall of the attraction magnet cavity, an attraction magnet is connected into the attraction magnet cavity in a sliding fit mode, and a second stretching spring is fixedly connected between the upper end face of the attraction magnet and the upper end wall of the attraction magnet cavity.

On the basis of the technical scheme, the counting cavity comprises a first driven shaft, the first driven shaft is connected with the left end wall of the counting cavity in a rotating fit manner and extends leftwards to the counting cavity, the counting cavity extends rightwards to penetrate through the rear side belt wheel cavity to the upper side belt wheel cavity, three first transmission gears connected with the first driven shaft in a rotating fit manner are arranged in the counting cavity at equal intervals, the left end face of each first transmission gear is fixedly connected with a counting wheel, the left end face of each counting wheel is fixedly connected with a half gear connected with the first driven shaft in a rotating fit manner, a hollow cavity communicated leftwards and rightwards is arranged in the counting wheel, a second transmission gear fixedly connected with the driving shaft and meshed with the first transmission gear at the right side is arranged in the power cavity, and a rotary disc fixedly connected with the first driven shaft is arranged in the hollow cavity at the upper side, the outer terminal surface fixed connection right plectrum of carousel, the upside well cavity lateral wall fixedly connected with can with the stopper of plectrum butt, the upside fixedly connected with magnet in the outer end wall of count wheel, upside count chamber upside intercommunication be equipped with can with the magnetism slider chamber that magnet corresponds, magnetism slider intracavity sliding fit is connected with the magnetism slider, magnetism slider up end with fixedly connected with stay cord between the actuation magnet up end.

On the basis of the technical scheme, the transmission wheel cavity includes the second driven shaft, the second driven shaft with the transmission wheel cavity left end wall normal running fit is connected and extends to left the transmission wheel intracavity, sliding block intracavity normal running fit is connected and extends to backward sliding block, upside in the connecting plate intracavity the second driven shaft extends to right the sliding block normal running fit is connected, transmission wheel intracavity bilateral symmetry be equipped with the second driven shaft normal running fit is connected and can with first transmission gear and half gear engagement's third drive gear.

On the basis of the technical scheme, the centrifugal wheel cavity comprises a third driven shaft, the third driven shaft is connected with the right end wall of the centrifugal wheel cavity in a rotating fit manner, the third driven shaft extends leftwards into the centrifugal wheel cavity and rightwards into the rear side belt wheel cavity, a third belt wheel fixedly connected with the third driven shaft is arranged in the rear side belt wheel cavity, a fourth belt wheel fixedly connected with the first driven shaft at the upper side is further arranged in the rear side belt wheel cavity, a second transmission belt is connected between the fourth belt wheel and the third belt wheel in a power fit manner, a fifth belt wheel fixedly connected with the first driven shaft at the upper side is arranged in the upper side belt wheel cavity, a third transmission belt capable of being tightened by the magnetic tightening block is connected between the fifth belt wheel and the second belt wheel in a power fit manner, a centrifugal wheel fixedly connected with the third driven shaft is arranged in the centrifugal wheel cavity, the centrifugal wheel is characterized in that a centrifugal block cavity with an outward opening is circumferentially arranged in the centrifugal wheel, a centrifugal block is connected in the centrifugal block cavity in a sliding fit mode, a third extension spring is fixedly connected between the inner end face of the centrifugal block and the inner end wall of the centrifugal block cavity, a connecting plate fixedly connected with the upper end face of the sliding block is connected in the connecting plate cavity in a sliding fit mode, and a compression spring is fixedly connected between the upper end face of the connecting plate and the upper end wall of the connecting plate cavity.

The invention has the beneficial effects that: thereby start through the electro-magnet and drive the plectrum and rotate and drive the automatic zero clearing of upside count wheel numerical value, after the count wheel of three sides all zero clearing in the left side, the right side, actuation magnet and the automatic reset of tensioning piece to realize the automatic zero clearing of upside count wheel monthly, thereby the count wheel of guaranteeing both sides about the upper and lower side measures total power consumption of record and power consumption in the month respectively, no longer need record the reading of ammeter every month when satisfying the different demands of resident family.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a counter for an electric meter capable of displaying the current monthly electricity consumption according to the present invention;

FIG. 2 is a schematic sectional view taken along the line A-A in FIG. 1;

FIG. 3 is a schematic sectional view taken along line B-B in FIG. 2;

FIG. 4 is a schematic sectional view taken along the direction C-C in FIG. 1;

fig. 5 is an enlarged schematic view of the structure at D in fig. 1.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

The invention will now be described in detail with reference to fig. 1-5, for convenience of description, the following orientations will now be defined: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

As shown in fig. 1-5, the counter for displaying the current monthly electricity consumption for the electricity meter of the device of the present invention comprises a main body box 10, wherein a lower side belt wheel cavity 51 is arranged in the main body box 10 in a vertically symmetrical manner, a counting cavity 20 is communicated with the outer side of the lower side belt wheel cavity 51, a display cavity 21 with a forward opening is communicated with the front side of the counting cavity 20, a transmission wheel cavity 17 is communicated with the rear side of the counting cavity 20, an upper side belt wheel cavity 61 is arranged on the right side of the counting cavity 20, a motor 53 fixedly connected with the main body box 10 is arranged on the right side of the upper side belt wheel cavity 61, a rear side belt wheel cavity 36 which is positioned on the upper side of the lower side belt wheel cavity 51 and extends backwards is arranged between the upper side belt wheel cavity 61 and the upper side counting cavity 20, a centrifugal wheel cavity 62 which is positioned on the rear side of the upper side belt wheel cavity 20 is arranged on the left side of the rear side belt wheel cavity 36, a connecting plate cavity 29 which is communicated with the, the front side of the connecting plate cavity 29 is communicated with a sliding block cavity 40 which is communicated with the transmission wheel cavity 17 leftwards and is positioned on the left side of the centrifugal wheel cavity 62.

In addition, in one embodiment, the upper side pulley cavity 61 includes a driving shaft 47, the driving shaft 47 is connected with the right end surface of the power cavity 48 in a rotating fit manner, the driving shaft 47 extends leftwards into the power cavity 48 and rightwards into the lower side pulley cavity 51, a first pulley 49 located in the lower side pulley cavity 51 is fixedly connected to the driving shaft 47, a first driving belt 50 is connected between the first pulleys 49 in a power fit manner, the upper side driving shaft 47 extends leftwards to penetrate through the lower side pulley cavity 51 and the upper side pulley cavity 61 and then is fixedly connected with the left end surface of the motor 53, a second pulley 52 fixedly connected with the upper side driving shaft 47 is arranged in the upper side pulley cavity 61, a tightening block cavity 43 located between the lower side pulley cavity 51 and the rear side pulley cavity 36 is communicated with the left side of the upper side pulley cavity 61, and a magnetic tightening block 45 is connected in the tightening block cavity 43 in a sliding fit manner, a first extension spring 44 is fixedly connected between the left end surface of the magnetic tightening block 45 and the left end wall of the tightening block cavity 43, the right side of the upper side belt wheel cavity 61 is communicated with an attraction cavity 54 corresponding to the tightening block cavity 43, the upper side of the attraction cavity 54 is communicated with an attraction magnet cavity 55, an electromagnet 58 is fixedly connected in the upper end wall of the attraction magnet cavity 55, an attraction magnet 56 is connected in the attraction magnet cavity 55 in a sliding fit manner, and a second extension spring 57 is fixedly connected between the upper end surface of the attraction magnet 56 and the upper end wall of the attraction magnet cavity 55; the electromagnet 58 is started once every month, the motor 53 is started to drive the upper driving shaft 47 to rotate, so as to drive the second belt wheel 52 and the upper first belt wheel 49 to rotate, the upper first belt wheel 49 rotates to drive the lower first belt wheel 49 to rotate through the first driving belt 50, so as to drive the lower driving shaft 47 to rotate, when the electromagnet 58 is started, the repulsive force between the electromagnet 58 and the attraction magnet 56 drives the attraction magnet 56 to overcome the pulling force of the second extension spring 57 to move downwards into the attraction cavity 54, so as to enable the magnetic tightening block 45 to be opposite to the attraction magnet 56, the magnetic tightening block 45 overcomes the pulling force of the first extension spring 44 to move leftwards into the attraction cavity 54 and attract the attraction magnet 56 under the action of the attractive force between the magnetic tightening block 45 and the attraction magnet 56, after the electromagnet 58 is turned off, the magnetic tightening block 45 and the attraction magnet 56 are kept in an attraction state because the pulling force of the second extension spring 57 and the first extension spring 44 is smaller than the attraction force between the magnetic tightening block 45 and the attraction magnet 56.

In addition, in one embodiment, the counting chamber 20 includes a first driven shaft 11, the first driven shaft 11 is connected with the left end wall of the counting chamber 20 in a rotating fit manner and extends leftwards into the counting chamber 20, the upper side of the counting chamber 20 extends rightwards to penetrate through the rear side pulley chamber 36 to the upper side pulley chamber 61, three first transmission gears 13 connected with the first driven shaft 11 in a rotating fit manner are arranged in the counting chamber 20 at equal intervals left and right, a counting wheel 16 is fixedly connected with the left end surface of the first transmission gear 13, a half gear 12 connected with the first driven shaft 11 in a rotating fit manner is fixedly connected with the left end surface of the counting wheel 16, a hollow cavity 14 penetrating left and right is arranged in the counting wheel 16, a second transmission gear 46 fixedly connected with the driving shaft 47 and meshed with the right side of the first transmission gear 13 is arranged in the power cavity 48, a rotary disc 23 fixedly connected with the first driven shaft 11 is arranged in the hollow cavity 14 at the upper side, a right shifting piece 22 is fixedly connected to the outer end face of the rotating disc 23, a limiting block 24 which can be abutted against the shifting piece 22 is fixedly connected to the side wall of the upper hollow cavity 14, a magnet 15 is fixedly connected to the inner side of the outer end wall of the upper counting wheel 16, a magnetic slider cavity 25 which can correspond to the magnet 15 is communicated to the upper side of the upper counting cavity 20, a magnetic slider 27 is connected to the magnetic slider cavity 25 in a sliding fit manner, and a pull rope 59 is fixedly connected between the upper end face of the magnetic slider 27 and the upper end face of the attraction magnet 56; the driving shaft 47 rotates to drive the second transmission gear 46 to rotate, so as to drive the right first transmission gear 13 to rotate, the right first transmission gear 13 rotates to drive the right counting wheel 16 and the right half gear 12 to rotate, so as to provide power for counting at the upper side and the lower side, when the counting wheel 16 at the upper side rotates, the limiting block 24 is driven to rotate, because the plectrum 22 can be compressed inwards, the limiting block 24 does not drive the plectrum 22 to rotate, when the first driven shaft 11 at the upper side rotates, the plectrum 22 is driven to rotate through the turntable 23, so as to drive the counting wheel 16 at the upper side to rotate, so as to drive the limiting blocks 24 at the left, the middle and the right sides to rotate correspondingly, and simultaneously when the counting wheel 16 at the upper side rotates until the magnet 15 corresponds to the magnetic slider 27, the digit zero at the outer end wall of the counting wheel 16 at the upper side just faces the display cavity 21, the magnetic slider 27 moves downward under the action of the attraction force between the magnet 15 and the magnetic slider 27, so that the attraction magnet 56 is driven by pulling the rope 59 to overcome the attraction force between the attraction magnet 56 and the magnetic tightening block 45 and move upward to the initial position, and the magnetic tightening block 45 moves leftward to the initial position under the action of the tension force of the first extension spring 44.

In addition, in one embodiment, the transmission wheel cavity 17 includes a second driven shaft 19, the second driven shaft 19 is connected with the left end wall of the transmission wheel cavity 17 in a rotating fit mode and extends leftwards into the transmission wheel cavity 17, a sliding block 28 extending backwards into the connecting plate cavity 29 is connected in a sliding fit mode in the sliding block cavity 40, the second driven shaft 19 on the upper side extends rightwards into the sliding block 28 in a rotating fit mode, and third transmission gears 18 which are connected with the second driven shaft 19 in a rotating fit mode and can be meshed with the first transmission gear 13 and the half gear 12 are symmetrically arranged in the transmission wheel cavity 17 in the left-right mode; the right half gear 12 rotates one turn and drives the middle first transmission gear 13 to rotate one tenth of a turn through the right third transmission gear 18, thereby driving the middle side counting wheel 16 and the middle side half gear 12 to rotate for one tenth of a turn, the middle side half gear 12 rotates for one tenth of a turn and drives the left side first transmission gear 13 to rotate for one tenth of a turn through the left side third transmission gear 18, thereby driving the left-hand counting wheel 16 and the left-hand half gear 12 to rotate one tenth of a turn, therefore, decimal counting is realized by a mechanical structure, when the sliding block 28 moves backwards, the upper second driven shaft 19 and the upper third transmission gear 18 are driven to move backwards, the upper third transmission gear 18 is separated from the upper first transmission gear 13 and the upper half gear 12, and interference on upper counting resetting is avoided.

In addition, in an embodiment, the centrifugal wheel cavity 62 includes a third driven shaft 34, the third driven shaft 34 is connected with a right end wall of the centrifugal wheel cavity 62 in a rotating fit manner, the third driven shaft 34 extends leftwards into the centrifugal wheel cavity 62 and rightwards into the rear pulley cavity 36, a third pulley 35 fixedly connected with the third driven shaft 34 is arranged in the rear pulley cavity 36, a fourth pulley 41 fixedly connected with the upper side first driven shaft 11 is further arranged in the rear pulley cavity 36, a second transmission belt 32 is connected between the fourth pulley 41 and the third pulley 35 in a power fit manner, a fifth pulley 60 fixedly connected with the upper side first driven shaft 11 is arranged in the upper pulley cavity 61, a third transmission belt 42 capable of being tightened by the magnetic tightening block 45 is connected between the fifth pulley 60 and the second pulley 52 in a power fit manner, a centrifugal wheel 33 fixedly connected with the third driven shaft 34 is arranged in the centrifugal wheel cavity 62, a centrifugal block cavity 39 with an outward opening is arranged in the inner circumference of the centrifugal wheel 33, a centrifugal block 38 is connected in the centrifugal block cavity 39 in a sliding fit manner, a third extension spring 37 is fixedly connected between the inner end surface of the centrifugal block 38 and the inner end wall of the centrifugal block cavity 39, a connecting plate 31 fixedly connected with the upper end surface of the sliding block 28 is connected in the connecting plate cavity 29 in a sliding fit manner, and a compression spring 30 is fixedly connected between the upper end surface of the connecting plate 31 and the upper end wall of the connecting plate cavity 29; when the magnetic tightening block 45 moves to the right to tighten the third transmission belt 42, the second belt pulley 52 rotates to drive the fifth belt pulley 60 to rotate through the third transmission belt 42, so as to drive the upper first driven shaft 11 to rotate, the upper first driven shaft 11 rotates to drive the fourth belt pulley 41 to rotate, so as to drive the third belt pulley 35 to rotate through the second transmission belt 32, the third belt pulley 35 rotates to drive the centrifugal wheel 33 to rotate through the third driven shaft 34, so as to drive the centrifugal block 38 to move outwards against the pulling force of the third tension spring 37 under the action of the centrifugal force, so as to push the connecting plate 31 to move backwards against the pushing force of the compression spring 30, so as to drive the sliding block 28 to move backwards, when the magnetic tightening block 45 moves to the left without tightening the third transmission belt 42, the first driven shaft 11 on the upper side stops rotating and the slide block 28 moves forward to the initial position.

The applicant will now specifically describe a meter counter for electricity meters of the present application with reference to figures 1 to 5 and the above description, which is capable of displaying the current monthly electricity usage:

in an initial state, the first stretching spring 44 is in a relaxed state, the magnetic tightening block 45 is completely positioned in the tightening block cavity 43, the third transmission belt 42 is in a relaxed non-transmission state, the attraction magnet 56 is completely positioned in the attraction magnet cavity 55, the second stretching spring 57 is in a relaxed state, the pull rope 59 is in a tightened state, the centrifugal block 38 is completely positioned in the centrifugal block cavity 39, the third stretching spring 37 is in a relaxed state, the compression spring 30 is in a relaxed state, and the upper third transmission gear 18 is meshed with the corresponding upper first transmission gear 13 and the upper half gear 12;

when the electric meter starts to work, the electric meter sends a signal when detecting power consumption, thereby the motor 53 is started, thereby the first transmission gear 13 of downside rotates on the drive, thereby the counting starts, after the electromagnet 58 starts, the magnetic tightening block 45 and the attraction magnet 56 attract each other, the third transmission belt 42 tightens the transmission, thereby the first driven shaft 11 of upside is driven to rotate, the first driven shaft 11 of upside rotates to rotate the counting wheel 16 of upside to the magnet 15 and the magnetic slider 27 just through the plectrum 22 butt stopper 24, the zero figure on the outer surface of the counting wheel 16 just faces the display cavity 21, the attraction magnet 56 resets under the pull effect of the pull rope 59, thereby the resetting of upside counting is completed, thereby the numerical value displayed by the upside counting is guaranteed to be the power consumption in the month all the time.

The above description is only an embodiment of the invention, but the scope of the invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the invention. Therefore, the protection scope of the invention should be subject to the protection scope defined by the claims.

Claims

1. The utility model provides an ammeter is with counter that can show power consumption in the month, includes the main part case, its characterized in that: the main part incasement is equipped with the downside band pulley chamber of longitudinal symmetry, downside band pulley chamber outside intercommunication is equipped with the count chamber, count chamber front side intercommunication is equipped with open-ended demonstration chamber forward, count chamber rear side intercommunication is equipped with the transmission wheel chamber, count chamber right side is equipped with the upper side band pulley chamber, upper side band pulley chamber right side be equipped with main part case fixed connection's motor, upper side band pulley chamber and upside be equipped with between the count chamber and be located the rear side band pulley chamber of downside band pulley chamber upside and backward extension, rear side band pulley chamber left side is equipped with and is located the upside the centrifugation wheel chamber of count chamber rear side, centrifugation wheel chamber rear side intercommunication is equipped with left and upside the connecting plate chamber of transmission wheel chamber intercommunication, connecting plate chamber front side intercommunication be equipped with left with transmission wheel chamber intercommunication and be located the left sliding block chamber of centrifugation wheel chamber.

2. The counter of claim 1 for an electricity meter capable of displaying the current monthly electricity usage, wherein: the upper belt wheel cavity comprises a driving shaft, the driving shaft is connected with the right end face of the power cavity in a rotating fit manner, the driving shaft extends leftwards into the power cavity and rightwards into the lower belt wheel cavity, a first belt wheel positioned in the lower belt wheel cavity is fixedly connected onto the driving shaft, a first transmission belt is connected between the first belt wheels in a power fit manner, the upper driving shaft extends leftwards to penetrate through the lower belt wheel cavity and the upper belt wheel cavity and then is fixedly connected with the left end face of the motor, a second belt wheel fixedly connected with the upper driving shaft is arranged in the upper belt wheel cavity, a tensioning block cavity positioned between the lower belt wheel cavity and the rear belt wheel cavity is communicated with the left side of the upper belt wheel cavity, a magnetic tensioning block is connected in a sliding fit manner in the tensioning block cavity, and a first stretching spring is fixedly connected between the left end face of the magnetic tensioning block and the left end wall of the tensioning block cavity, the upper side belt wheel cavity is communicated with the right side of the upper side belt wheel cavity, an attraction cavity corresponding to the tightening block cavity is formed in the upper side of the attraction cavity, an attraction magnet cavity is formed in the upper side of the attraction cavity in a communicated mode, an electromagnet is fixedly connected into the upper end wall of the attraction magnet cavity, an attraction magnet is connected into the attraction magnet cavity in a sliding fit mode, and a second stretching spring is fixedly connected between the upper end face of the attraction magnet and the upper end wall of the attraction magnet cavity.

3. The counter of claim 1 for an electricity meter capable of displaying the current monthly electricity usage, wherein: the counting cavity comprises a first driven shaft, the first driven shaft is connected with the left end wall of the counting cavity in a rotating fit manner and extends into the counting cavity leftwards, the counting cavity extends rightwards to penetrate through the rear side belt wheel cavity into the upper side belt wheel cavity, three first transmission gears connected with the first driven shaft in a rotating fit manner are arranged in the counting cavity at equal intervals leftwards and rightwards, the left end face of each first transmission gear is fixedly connected with a counting wheel, the left end face of each counting wheel is fixedly connected with a half gear connected with the first driven shaft in a rotating fit manner, a hollow cavity communicated leftwards and rightwards is formed in the counting wheel, a second transmission gear fixedly connected with the driving shaft and meshed with the first transmission gear at the right side is arranged in the power cavity, a rotary disc fixedly connected with the first driven shaft is arranged in the hollow cavity at the upper side, and a right shifting sheet is fixedly connected with, upside well cavity lateral wall fixedly connected with can with the stopper of plectrum butt, upside fixedly connected with magnet in the outer end wall of count wheel, upside count chamber upside intercommunication be equipped with can with the magnetism slider chamber that magnet corresponds, magnetism slider intracavity sliding fit is connected with the magnetism slider, magnetism slider up end with fixedly connected with stay cord between the actuation magnet up end.

4. The counter of claim 1 for an electricity meter capable of displaying the current monthly electricity usage, wherein: the transmission wheel chamber includes the second driven shaft, the second driven shaft with transmission wheel chamber left end wall normal running fit is connected and extends to left the transmission wheel intracavity, sliding block intracavity sliding fit is connected and extends to backward sliding block, upside in the connecting plate intracavity the second driven shaft extends to right the sliding block normal running fit is connected, transmission wheel intracavity bilateral symmetry be equipped with the second driven shaft normal running fit connect and can with first transmission gear and half gear engagement's third transmission gear.

5. The counter of claim 1 for an electricity meter capable of displaying the current monthly electricity usage, wherein: the centrifugal wheel cavity comprises a third driven shaft, the third driven shaft is connected with the right end wall of the centrifugal wheel cavity in a rotating fit manner, the third driven shaft extends leftwards into the centrifugal wheel cavity and rightwards into the rear side belt wheel cavity, a third belt wheel fixedly connected with the third driven shaft is arranged in the rear side belt wheel cavity, a fourth belt wheel fixedly connected with the first driven shaft at the upper side is further arranged in the rear side belt wheel cavity, a second transmission belt is connected between the fourth belt wheel and the third belt wheel in a power fit manner, a fifth belt wheel fixedly connected with the first driven shaft at the upper side is arranged in the upper side belt wheel cavity, a third transmission belt capable of being tightened by the magnetic tightening block is connected between the fifth belt wheel and the second belt wheel in a power fit manner, a centrifugal wheel fixedly connected with the third driven shaft is arranged in the centrifugal wheel cavity, and a centrifugal block cavity with an outward opening is circumferentially arranged in the centrifugal wheel, the centrifugal block cavity is connected with a centrifugal block in a sliding fit mode, a third extension spring is fixedly connected between the inner end face of the centrifugal block and the inner end wall of the centrifugal block cavity, a connecting plate fixedly connected with the upper end face of the sliding block is connected with the connecting plate in a sliding fit mode in the connecting plate cavity, and a compression spring is fixedly connected between the upper end face of the connecting plate and the upper end wall of the connecting plate cavity.