CN210840534U - Electromagnetic interference free instrument shielding cover for weighing apparatus - Google Patents
Electromagnetic interference free instrument shielding cover for weighing apparatus Download PDFInfo
- Publication number
- CN210840534U CN210840534U CN201920309596.1U CN201920309596U CN210840534U CN 210840534 U CN210840534 U CN 210840534U CN 201920309596 U CN201920309596 U CN 201920309596U CN 210840534 U CN210840534 U CN 210840534U
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- cover body
- instrument
- weighing apparatus
- square
- electromagnetic interference
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Abstract
The utility model relates to the technical field of instruments, in particular to an electromagnetic interference free instrument shielding case for a weighing apparatus, which comprises an instrument shielding case body, wherein the instrument shielding case body comprises supporting legs and a cover body; the supporting legs are movably connected with the cover body; it has the advantages of convenient assembly and disassembly, good shielding effect and the like.
Description
Technical Field
The utility model relates to an instrument technical field, in particular to weighing apparatus is with exempting from electromagnetic interference's instrument shield cover.
Background
With the development of science and technology, instruments are widely used as parts of mechanical equipment. For example, the instrument with the detection circuit is used because the instrument adopts the plastic shell, and electromagnetic signals can penetrate through the plastic shell to interfere the detection circuit of the instrument on certain strong magnetic industrial weighing occasions. For example, the intercom electromagnetic signal is conducted and overlapped back to the detection circuit, so that the logic function of the detection circuit is disordered, and the interference phenomena that the instrument cannot be positioned, the loading error data cannot be stable and the like are caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a weighing apparatus is with electromagnetic interference's of exempting from instrument shield cover to prior art's defect and not enough.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model relates to an electromagnetic interference free instrument shielding cover for a weighing apparatus, which comprises an instrument shielding cover body, wherein the instrument shielding cover body comprises supporting legs and a cover body; the supporting legs are movably connected with the cover body.
Furthermore, the cover body is square, the cover body is made of 0.2mm thick copper foil, and a plurality of clamping heads are arranged on the periphery of the bottom surface of the cover body.
Furthermore, the landing leg is square, the surface of the landing leg is provided with a square slotted hole, and the periphery of the surface of the landing leg is provided with a clamping groove matched with the clamping head of the cover body.
Furthermore, the surface of the cover body is coated with a shielding paint layer.
Furthermore, the supporting legs are welded on the square PCB welding disc of the circuit board.
The shielding case material adopts 0.2mm thick copper white as a material, and the copper white is a metal shielding material easy to be coated with tin. The protection principle is mainly to protect the electromagnetic shielding device in the electromagnetic transmission way, so that the harmful electromagnetic field is reduced to be within an allowable range. The shielding device is a closed shell made of metal materials. In the production process, after the bracket is welded with the PCB pad, the metal shielding cover is aligned to the direction on the bracket and slightly pressed (the installation position has sound according to the buckle principle).
The shielding paint adheres to the entire surface of the shield. The main components are graphite and carbon ash; has the characteristics of high chemical stability, strong oxidation resistance, very high adhesiveness, difficult shedding and the like. The operation is simple, and the use mode is the same as that of common paint. After the shielding cover is installed, a layer of shielding cover is coated on the surface of the shielding cover by a small brush without maintenance.
After the structure is adopted, the utility model discloses beneficial effect does: a weighing apparatus is with instrument shield cover of exempting from electromagnetic interference, it has the installation and dismantles the convenience, shields advantage such as effectual.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a structural view of a circuit board for a conventional weighing apparatus according to the present invention;
fig. 3 is a schematic structural diagram of a high-precision ADS1230 module detection circuit in a circuit board for a conventional weighing apparatus of the present invention, which is provided with a rectangular PCB pad all around.
Description of reference numerals:
1. a support leg; 11. a square slot; 2. a cover body; 3. shielding the paint layer; 4. a circuit board; 5. ADS1230 modulus detection circuit; 6. a weighing sensor input interface; 7. square PCB pad.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the electromagnetic interference free instrument shield for weighing apparatus of the present invention comprises an instrument shield body, the instrument shield body comprises a support leg 1 and a cover body 2; the supporting legs 1 are movably connected with the cover body 2.
Furthermore, the cover body 2 is square, the cover body 2 is made of white copper with the thickness of 0.2mm, and a plurality of clamping heads are arranged on the periphery of the bottom surface of the cover body 2.
Furthermore, landing leg 1 is square, and 1 surface of landing leg is provided with and square slotted hole 11, and 1 surface of landing leg is provided with all around with the dop matched with draw-in groove of cover body 2.
Further, the surface of the cover body 2 is coated with a shielding paint layer 3.
Further, the support leg 1 is welded on the square PCB pad 7 of the circuit board 4.
The working principle of the utility model is as follows:
as shown in fig. 1, in the present design, the instrument shield case body includes a leg and a cover body; the supporting legs are movably connected with the cover body. The instrument shielding case is made of 0.2mm thick copper white, which is a metal shielding material easy to be coated with tin. The protection principle is mainly to protect the electromagnetic shielding device in the electromagnetic transmission way, so that the harmful electromagnetic field is reduced to be within an allowable range. The shielding device is a closed shell made of metal materials. In the production process, after the bracket is welded with the PCB pad, the metal shielding cover is aligned to the direction on the bracket and slightly pressed (the installation position has sound according to the buckle principle).
As shown in fig. 2, a circuit board 4 for conventional weighing apparatus/measurement is provided, and a high-precision ADS1230 analog-to-digital detection circuit 5 is disposed on one side of the circuit board 4, and has the characteristics of high sensitivity, fast conversion speed, high precision, and the like. And a weighing sensor input interface 6 is arranged on one side of the high-precision ADS1230 analog-to-digital detection circuit 5. Although the signal transmission line uses a cable with shielding effect, because the meter uses a plastic shell, in some strong magnetic industrial weighing occasions, an electromagnetic signal penetrates through the plastic shell to dry the ADS1230 detection circuit. For example, when an interphone in a security room calls, the electromagnetic signal of the interphone is conducted and superposed on the detection circuit, so that the logic of the detection circuit is disordered, and the phenomena of instrument calibration failure, loading error, data instability and the like are caused.
As shown in fig. 3, for the conventional circuit board 4 for weighing apparatus/metering, a square-shaped PCB pad 7 is disposed around the high-precision ADS1230 module detection circuit 5, and the support leg 1 and the PCB pad 8 are connected by welding.
In this design, landing leg 1 surface be provided with square slot 11, this square slot 11 is the maintenance mouth of high accuracy ADS1230 detection circuitry on circuit board 4, when needing to maintain, opens cover body 2 and can maintain or change ADS1230 detection circuitry through square slot 11.
In this design, the shielding paint adheres to the entire surface of the shield. The main components are graphite and carbon ash; has the characteristics of high chemical stability, strong oxidation resistance, very high adhesiveness, difficult shedding and the like. The operation is simple, and the use mode is the same as that of common paint. After the shielding cover is installed, a layer of shielding cover is coated on the surface of the shielding cover by a small brush without maintenance.
The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.
Claims (2)
1. An electromagnetic interference free instrument shielding case for a weighing apparatus comprises an instrument shielding case body, wherein the instrument shielding case body comprises supporting legs and a cover body; the supporting legs are movably connected with the cover body; the mask body is square, the mask body is made of 0.2mm thick copper foil, and a plurality of clamping heads are arranged on the periphery of the bottom surface of the mask body; the supporting leg is square, a square groove hole is formed in the surface of the supporting leg, and clamping grooves matched with the clamping heads of the cover body are formed in the periphery of the surface of the supporting leg;
the method is characterized in that: and a shielding paint layer is coated on the surface of the cover body.
2. The electromagnetic interference free instrument shield cover for the weighing apparatus according to claim 1, wherein: the supporting legs are welded on the square-shaped PCB bonding pad of the circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920309596.1U CN210840534U (en) | 2019-03-12 | 2019-03-12 | Electromagnetic interference free instrument shielding cover for weighing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920309596.1U CN210840534U (en) | 2019-03-12 | 2019-03-12 | Electromagnetic interference free instrument shielding cover for weighing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210840534U true CN210840534U (en) | 2020-06-23 |
Family
ID=71259076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920309596.1U Expired - Fee Related CN210840534U (en) | 2019-03-12 | 2019-03-12 | Electromagnetic interference free instrument shielding cover for weighing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210840534U (en) |
-
2019
- 2019-03-12 CN CN201920309596.1U patent/CN210840534U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200623 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |