CN113395811A

CN113395811A - Upper rack type equipment for electrostatic discharge protection

Info

Publication number: CN113395811A
Application number: CN202010178416.8A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhongchuangwei Chengdu Quantum Communication Technology Co Ltd
Current assignee: Zhongchuangwei Chengdu Quantum Communication Technology Co Ltd
Priority date: 2020-03-14
Filing date: 2020-03-14
Publication date: 2021-09-14

Abstract

The invention provides an upper rack type device for electrostatic discharge protection, which comprises a front panel, a side plate, a rear panel, a bottom plate, an electrostatic discharge protection structure and a PCB (printed Circuit Board), wherein the front panel, the side plate, the rear panel and the bottom plate form an accommodating space, the electrostatic discharge protection structure and the PCB are arranged in the accommodating space, the electrostatic discharge protection structure comprises a contact elastic sheet, and the contact elastic sheet comprises a horizontal part, a connecting part and a vertical part. The contact elastic sheet is connected with the upper surface metal sheet of the net opening in a welding or buckling mode, so that each external interface on the circuit board in the equipment can be fully contacted and conducted to the ground through the shell of the equipment, the damage of electrostatic discharge to the circuit board is effectively weakened, and the electromagnetic compatibility of the equipment is ensured. Meanwhile, the installation and the disassembly of the contact elastic sheet in the device and the fixed phase are more reliable for bonding the conductive foam, and the product quality is further improved.

Description

Upper rack type equipment for electrostatic discharge protection

The technical field is as follows:

the invention relates to a rack-mounted device, in particular to a rack-mounted device for electrostatic discharge protection.

Background art:

electrostatic Discharge (Electrostatic Discharge) refers to charge transfer caused by objects with different Electrostatic potentials approaching or directly contacting each other, and is the main cause of excessive electrical stress damage to electronic components or integrated circuit systems in all devices, and is no exception to rack-mounted devices.

The circuit board selected in the present device also considers the electrostatic discharge protection in terms of hardware design, but with the continuous development of integrated circuit technology, the characteristic size of a cmos (complementary Metal Oxide semiconductor) circuit is continuously reduced, the area scale of a chip is larger and larger, the current and the pressure that an MOS transistor can bear are smaller and smaller, and the surrounding use environment is not changed, so on one hand, the antistatic discharge performance of the circuit is further optimized, on the other hand, some upgrade optimization can be made on the structure of the device, the damage of the electrostatic discharge to the circuit board is prevented as much as possible, and the EMC (electromagnetic compatibility) of the whole device is improved.

Therefore, with the development of the rack-mounted device, it is a technical problem that needs to be solved urgently to improve the electrostatic discharge protection capability of the rack-mounted device.

The invention content is as follows:

the invention provides an upper rack type device for electrostatic discharge protection, which aims to solve the problem that an internal circuit board of the device is damaged by electrostatic discharge.

In order to achieve the technical purpose, the invention is realized by the following technical scheme:

the invention provides an upper rack type device for electrostatic discharge protection, which comprises a front panel, a side plate, a rear panel, a bottom plate, an electrostatic discharge protection structure and a PCB (Printed Circuit Board), wherein the front panel, the side plate, the rear panel and the bottom plate form an accommodating space, the electrostatic discharge protection structure and the PCB are arranged in the accommodating space, the electrostatic discharge protection structure comprises a contact elastic sheet, and the contact elastic sheet comprises a horizontal part, a connecting part and a vertical part.

Further, the horizontal part and the connecting part are arranged into a plurality of clamping teeth.

Furthermore, the width of the clamping teeth is 16mm-20mm, and the distance between every two adjacent clamping teeth is 2mm-3 mm.

Further, the total length of the contact spring piece is 165mm-175 mm.

Furthermore, the included angle between the horizontal part and the connecting part is 140-160 degrees, and the horizontal part and the vertical part are perpendicular to each other.

Furthermore, the thickness of the contact elastic sheet is 0.1mm-0.3 mm.

Furthermore, at least two screw locking holes are uniformly arranged on the vertical part

Furthermore, the portable electronic device also comprises a plurality of net ports, wherein the net ports are arranged on the inner side of the front panel and are electrically connected with the PCB.

Furthermore, the latch respectively with net gape upper surface connection, the connected mode is welding or lock joint.

Furthermore, the contact spring is integrally formed and made of simple substance metal or alloy.

The invention provides a rack-mounted device for electrostatic discharge protection, which has the following advantages:

1. the static discharge protection structure is provided for the upper rack type equipment, the static discharge protection is realized through the contact elastic sheet, and the contact elastic sheet has low processing cost and high efficiency;

2. the contact spring sheet is simple to assemble and easy to operate;

3. the contact elastic sheet is added, so that external metal devices on the circuit board can be directly and effectively connected with the shell;

4. compared with the common conductive foam, the contact elastic sheet is easy to mount and dismount, is not easy to damage and fall off, and is reliable in connection.

Drawings

FIG. 1 is a schematic diagram of an internal structure of a rack-mounted ESD protection apparatus according to the present invention;

FIG. 2 is an enlarged view of an upper rack apparatus A for ESD protection according to the present invention;

FIG. 3 is a schematic structural diagram of an upper rack type device contact spring for ESD protection according to the present invention;

fig. 4 is a schematic cross-sectional view of a contact spring of an electrostatic discharge protection rack-mounted device according to the present invention.

Reference numerals: 10-upper rack type equipment for electrostatic discharge protection, 100-contact spring, 101-horizontal part, 102-connecting part, latch-200, 103-vertical part, 104-screw locking hole, 110-front panel, 120-side panel, 130-rear panel, 140-bottom plate, 150-PCB, 160-net port and 170-USB port.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments that can be obtained by a person skilled in the art based on the embodiments of the present invention without any inventive work are within the scope of the present invention.

The invention relates to a top rack type device for electrostatic discharge protection, which is described in detail below with reference to the accompanying drawings.

Example 1

Referring to fig. 1 to 4, an upper rack type device 10 for esd protection includes a front panel 110, a side panel 120, a rear panel 130, a bottom panel 140, an esd protection structure and a PCB 150, wherein the front panel 110, the side panel 120, the rear panel 130 and the bottom panel 140 are connected or fastened by screws to form an accommodating space, and the esd protection structure and the PCB 150 are disposed in the accommodating space. The bottom plate 140 is used for realizing internal support of components in the accommodating space, the PCB 150 is laid on the bottom plate 140, and screw locking holes are correspondingly formed in the bottom plate 140 and the PCB 150 so as to lock and fix the PCB 150 on the bottom plate 140. The end of the PCB 150 near the front panel is provided with a plurality of net ports 160, the net ports extend through the front panel to the outside of the front panel so as to be connected with external network cables, and the net port end of the inside of the front panel is electrically connected with the PCB 150. The esd protection structure includes a contact spring 100, and the contact spring 100 includes a horizontal portion 101, a connecting portion 102, and a vertical portion 103.

The horizontal portion 101 and the connecting portion 102 of the contact spring 100 are respectively provided with a plurality of latches 200, the number of the latches is designed according to the number of the net ports, one latch is correspondingly connected with one net port, the interface close to the side panel is a USB port 170, and the width of the USB port is narrower, so that the width of the corresponding latch is narrower than that of other latches. The horizontal portion 101 is connected to the upper surface metal sheet of the mesh opening 160 by welding. The contact spring sheet 100 is connected with the front panel 110 through welding the net port 160, when electrostatic discharge is generated outside or inside the equipment, the contact spring sheet 100 enables all external interfaces on a circuit board in the equipment to be in full contact and conduct electricity to the ground through a shell of the equipment, so that damage of the electrostatic discharge to the circuit board is effectively weakened, the electrostatic discharge protection effect is further achieved, the PCB 150 inside the equipment and other parts sensitive to the electrostatic are fully protected, and the electromagnetic compatibility performance of the upper rack type equipment is effectively guaranteed.

For the contact spring that is not divided into the latch, the electrostatic discharge protection performance of the contact spring that is divided into the latch is better, and when the connection between a certain latch or some latches and the net mouth 160 is insecure or bad, the connection between other latches and the net mouth can compensate the bad connection condition of other latches, so as to ensure that the rack-mounted device 10 has the electrostatic discharge protection capability at any time.

The total length of the contact spring 100 is 165mm-175mm, the width of the latch 200 is 16mm-20mm, the distance between adjacent latches is 2mm-3mm, the total length of the contact spring 100, the width of the latch 200 and the distance between adjacent latches are designed according to the size of a net opening, and the width of the latch 200 is slightly larger than the width of a metal sheet on the upper surface of the net opening so as to ensure that the contact between the latch and the net opening is more sufficient.

The included angle between the vertical portion 103 and the connecting portion 102 is 140-160 °, the horizontal portion 101 and the vertical portion 103 are perpendicular to each other, and the included angle between the vertical portion 103 and the connecting portion 102 cannot be too large or too small, so that the overall size of the contact spring 100 can be maintained within a reasonable range. If the included angle between the vertical portion 103 and the connecting portion 102 is too large or too small, the radial dimension of the connecting portion 102 is increased, which not only increases the manufacturing cost, but also may cause other parts of the device to be unable to be assembled.

The thickness of the contact spring 100 is 0.1mm-0.3mm, and the thickness is designed according to the strength requirement of the contact spring, if the thickness is too thin, the spring will deform in the working or assembling process, so that the device cannot work normally, and the electrostatic discharge protection performance of the device is weakened, even the device does not have the electrostatic discharge protection capability. Eventually, the entire rack-mounted device may be damaged due to electrostatic discharge. The thickness is too thick to facilitate assembly and also results in increased costs.

The vertical portion 103 is provided with at least two screw locking holes 104 for screw connection between the contact spring 100 and the front panel 110, and at least two screw locking holes are provided for ensuring the connection stability between the contact spring and the front panel.

According to another embodiment, the contact spring 100 and the metal on the upper surface of the mesh opening 160 are connected by means of buckling. In this embodiment, the mesh opening upper surface metal sheet is provided with a cut (not shown) in the lateral direction, and the horizontal portion of the contact spring is inserted into the upper surface metal sheet through the cut and is parallel to the upper surface metal sheet, thus being connected to the upper surface metal sheet of the mesh opening by snap-fitting. The connection in the physical mode is simple to operate, easy to disassemble and convenient to replace and maintain.

The contact spring 100 is formed integrally, and the integral forming method may be integral bending forming or casting forming, and the material of the integral forming is simple substance metal or alloy.

The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention, the above embodiments are only for assisting understanding of the method of the present invention and the core idea thereof, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an upper rack type equipment of electrostatic discharge protection, includes front panel, curb plate, rear panel, bottom plate, electrostatic discharge protective structure and PCB board, front panel, curb plate, rear panel and bottom plate form accommodation space, in this accommodation space is located to electrostatic discharge protective structure and PCB board, its characterized in that, electrostatic discharge protective structure includes the contact shell fragment, the contact shell fragment includes horizontal part, connecting portion and vertical portion.

2. The overhead equipment of claim 1, wherein the horizontal portion and the connecting portion are formed as a plurality of latches.

3. The overhead equipment for ESD protection according to claim 2, wherein the width of the latch is 16mm-20mm, and the distance between adjacent latches is 2mm-3 mm.

4. The overhead equipment of claim 1, wherein the contact spring has an overall length of 165mm to 175 mm.

5. The overhead equipment of claim 1, wherein the horizontal portion and the connecting portion are at an angle of 140 ° to 160 °, and the horizontal portion and the vertical portion are perpendicular to each other.

6. The overhead equipment of claim 1, wherein the contact spring has a thickness of 0.1mm to 0.3 mm.

7. The top rack apparatus for ESD protection according to claim 1, wherein the vertical portion has at least two screw locking holes.

8. The overhead equipment for ESD protection according to claim 1, further comprising a plurality of net ports, wherein the net ports are disposed inside the front panel and electrically connected to the PCB.

9. The upper rack type equipment for esd protection as claimed in claim 8, wherein the latches are respectively connected to the upper surface of the net opening by welding or fastening.

10. The overhead equipment of claim 1, wherein the contact spring is integrally formed and made of a simple metal or an alloy.