CN219758355U - Novel antistatic ammeter - Google Patents

Abstract

The utility model discloses a novel antistatic ammeter, belonging to the technical field of electric energy meters; the novel antistatic ammeter comprises a shell, wherein a PCB (printed circuit board) is arranged in the shell, a key switch is arranged on the PCB, a stratum is arranged on the PCB, the key switch comprises a main body and a metal shell arranged outside the main body, the metal shell is electrically connected with the stratum, the main body comprises a wiring terminal plate arranged on the inner side of the metal shell, a second insulating layer is arranged between the outer side of the wiring terminal plate and the metal shell, a key is arranged on the top surface of the wiring terminal plate, and a first insulating layer is arranged between the key and the metal shell; the utility model has the advantages of high safety of physical separation between the main body of the key switch and the metal shell and high connection stability between the key switch and the switch hole.

Description

Novel antistatic ammeter

Technical Field

The utility model relates to the technical field of electric energy meters, in particular to a novel antistatic electric meter.

Background

The ammeter is short for electric energy meter, and the ammeter is a meter for measuring electric energy, which is also called an ammeter, a fire meter, a kilowatt hour meter and the like. The ammeter is installed by home households, so the application foundation of the ammeter is very wide. The high-voltage static electricity on the ammeter shell has great harm to electronic devices in the ammeter, and the ammeter is easy to cause 'dead halt', 'reset' and even damage.

In the chinese patent application No. 2019209234135, an antistatic electricity meter is provided. In the utility model, when high-voltage static electricity exists on the shell, the static electricity firstly contacts the metal shell of the key switch and is led into the stratum on the PCB through the metal shell, thereby preventing the circuit and the electronic device from being damaged by the high-voltage static electricity, playing a role in protecting static electricity, realizing the anti-static effect and being beneficial to guaranteeing the property safety of users. However, this solution has the disadvantage that: the key switch is installed on the PCB board, and there is no protective structure between key switch's main part and the metal casing, probably leads to electric arc breakdown between main part and the metal casing, needs the improvement.

Disclosure of Invention

The utility model aims to solve the problem that arc breakdown possibly occurs between a main body and a metal shell of a key switch of an anti-static electricity meter in the prior art, and provides a novel anti-static electricity meter.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a novel antistatic ammeter, includes the casing, the inside of casing is provided with the PCB board, be provided with key switch on the PCB board, be provided with the stratum on the PCB board, key switch includes the main part and sets up the metal casing in the main part outside, electric connection between metal casing and the stratum, the main part is including installing the binding post board in the inboard of metal casing, be provided with the second insulating layer between binding post board's the outside and the metal casing, the top surface of binding post board is provided with the button, be provided with first insulating layer between button and the metal casing.

Further, the bottom surface of binding post board is provided with the pin, electric connection between pin and the PCB board.

Further, the bottom of the metal shell is provided with an insulated pin, and the metal shell is fixed on the PCB board through pin insertion.

Further, a switch hole is formed in the shell, the key switch is located in the switch hole, and the metal shell is attached to the side wall of the switch hole.

Further, the shell is a metal structural shell.

Further, flat conductive reinforcing ribs are arranged on the periphery of the surface of the metal shell, and penetrate through gaps between the metal shell and the side walls of the switch holes.

Further, the stratum is electrically connected with the ground wire binding post.

Compared with the prior art, the utility model provides a novel antistatic ammeter, which has the following beneficial effects:

according to the novel antistatic ammeter, the metal shell and the wiring terminal board are physically separated through the second insulating layer, arc breakdown is prevented from directly occurring between the metal shell and the wiring terminal board, the metal shell and the key are physically separated through the first insulating layer, indirect arc breakdown is prevented from occurring between the metal shell and the wiring terminal board through the key, and therefore arc breakdown is prevented from occurring between the column body of the key switch and the metal shell, and safety is improved.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows; and will be apparent to those skilled in the art in part based upon a review of the following; alternatively, the teachings may be directed to practice of the present utility model.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic diagram of a key switch according to the present utility model;

fig. 3 is a schematic diagram of a PCB structure according to the present utility model.

In the figure:

1. a housing; 2. a key switch; 3. a metal housing; 4. a first insulating layer; 5. a key; 6. pins; 7. a terminal block; 8. pins; 9. a PCB board; 10. a formation; 11. a ground wire binding post; 12. a second insulating layer; 13. reinforcing ribs.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-3, the novel antistatic ammeter comprises a shell 1, wherein the shell 1 is a metal structure shell, so that static electricity on the surface of the shell 1 can be transferred to a metal shell 3, the shell 1 is arranged on an ammeter base, the ammeter base is of an insulating structure, and a wiring terminal on the ammeter base is electrically connected with a PCB 9 and is insulated from the shell 1;

the inside of the shell 1 is provided with a PCB 9, the PCB 9 is provided with a key switch 2, the PCB 9 is provided with a stratum 10, the key switch 2 comprises a main body and a metal shell 3 arranged outside the main body, the metal shell 3 is electrically connected with the stratum 10, the stratum 10 is electrically connected with a ground wire binding post 11, the ground wire binding post 11 can be a direct connection ground wire or a wire connected with an ammeter box, high-voltage static electricity on the shell 1 is led into the stratum 10 through the metal shell 3 and then led into the ground wire binding post 11 through the stratum 10, so that static electricity on the surface of the shell 1 is led away, and damage to circuits and electronic components in the shell 1 caused by the high-voltage static electricity is prevented;

the main body comprises a wiring terminal board 7 arranged on the inner side of the metal shell 3, a wiring terminal of the key switch 2 is arranged on the wiring terminal board 7, a second insulating layer 12 is arranged between the outer side of the wiring terminal board 7 and the metal shell 3 and is physically separated from the metal shell 3, a key 5 is arranged on the top surface of the wiring terminal board 7, the key 5 can be made of a nonmetallic material, a first insulating layer 4 is arranged between the key 5 and the metal shell 3, and the key 5 and the metal shell 3 are physically separated from each other so as to avoid high-voltage arc breakdown;

the bottom surface of the wiring terminal board 7 is fixedly connected with a pin 6, the pin 6 is electrically connected with the PCB 9, and the wiring terminal board 7 enters a circuit of the PCB 9 through the pin 6;

the bottom of the metal shell 3 is fixedly connected with an insulated pin 8, the pin 8 is made of a nonmetallic material, and the metal shell 3 is fixedly spliced on the PCB 9 through the pin 8, so that the metal shell 3 is insulated from the PCB 9;

a switch hole is formed in the shell 1, the key switch 2 is positioned in the switch hole, and the metal shell 3 is attached to the side wall of the switch hole, so that high-voltage static electricity on the shell 1 can be conducted to the metal shell 3;

the surface of metal casing 3 welds around has flat electrically conductive strengthening rib 13, and strengthening rib 13 passes the gap between the lateral wall of metal casing 3 and switch hole, and when key switch 2 was installed in the switch hole, extrusion strengthening rib 13 between metal casing 3 and the switch hole increased the steadiness of metal casing 3 installation, prevented to connect between metal casing 3 and the switch hole not hard up.

Working principle: when high-voltage static electricity is accumulated on the surface of the shell 1, the high-voltage static electricity is conducted from the surface of the shell 1 to the metal shell 3 through the reinforcing ribs 13, arc breakdown between the metal shell 3 and the key 5 is prevented by the first insulating layer 4, arc breakdown between the metal shell 3 and the terminal board 7 is prevented by the second insulating layer 12, then the high-voltage static electricity is uploaded to the stratum 10 from the metal shell 3, and is conducted to the ground from the stratum 10 through the ground wire terminal 11, so that the high-voltage static electricity on the surface of the shell 1 is conducted away.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (7)

1. Novel antistatic ammeter, including casing (1), the inside of casing (1) is provided with PCB board (9), be provided with key switch (2) on PCB board (9), be provided with stratum (10) on PCB board (9), key switch (2) are including main part and metal casing (3) of setting in the main part outside, electric connection between metal casing (3) and stratum (10), a serial communication port, the main part is including installing binding post board (7) in the inboard of metal casing (3), be provided with second insulating layer (12) between the outside of binding post board (7) and metal casing (3), the top surface of binding post board (7) is provided with button (5), be provided with first insulating layer (4) between button (5) and metal casing (3).

2. The novel antistatic electricity meter according to claim 1, wherein a pin (6) is arranged on the bottom surface of the wiring terminal board (7), and the pin (6) is electrically connected with the PCB board (9).

3. The novel antistatic electricity meter according to claim 1, wherein an insulating pin (8) is arranged at the bottom of the metal shell (3), and the metal shell (3) is fixed on the PCB (9) through the pin (8) in a plugging manner.

4. The novel antistatic electricity meter according to claim 1, wherein the shell (1) is provided with a switch hole, the key switch (2) is positioned in the switch hole, and the metal shell (3) is attached to the side wall of the switch hole.

5. The novel antistatic electricity meter according to claim 4, wherein the housing (1) is a metal structural shell.

6. The novel antistatic electricity meter according to claim 5, wherein flat conductive reinforcing ribs (13) are arranged on the periphery of the surface of the metal shell (3), and the reinforcing ribs (13) penetrate through gaps between the metal shell (3) and the side walls of the switch holes.

7. The novel antistatic electricity meter according to claim 1, wherein the ground layer (10) is electrically connected to a ground terminal (11).