CN110505799B

CN110505799B - Display with rotating shaft end gap electromagnetic sealing structure

Info

Publication number: CN110505799B
Application number: CN201910922596.3A
Authority: CN
Inventors: 舒碧香; 胡欣; 刘航; 李旭; 唐涛
Original assignee: Hunan Sinoaegis Information Technology Co ltd
Current assignee: Hunan Sinoaegis Information Technology Co ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-09-11
Anticipated expiration: 2039-09-27
Also published as: CN110505799A

Abstract

The invention discloses a display with an electromagnetic sealing structure for rotating shaft end gap, which comprises a rotating shaft, an equipment bracket fixing piece, a metal winding and a winding fixing retainer ring, wherein the rotating shaft is provided with a rotating shaft end gap; the invention ensures that the normal mechanical rotation function of the rotating shaft is not influenced by designing and installing the winding at the joint of the rotating shaft and the equipment bracket fixing piece, simultaneously realizes the electromagnetic full sealing of the internal space of the equipment, reduces the electromagnetic leakage and interference transmission path, and achieves the aim of meeting the electromagnetic compatibility requirement of the electronic equipment.

Description

Display with rotating shaft end gap electromagnetic sealing structure

Technical Field

The invention relates to the field of displays, in particular to a display with an electromagnetic sealing structure for a rotating shaft end gap.

Background

Electromagnetic Compatibility (EMC), which is a abbreviation of EMC, means that an electronic device does not interfere with other devices, and is not affected by other devices. Electromagnetic compatibility is one of the most important indexes of product quality, and relates to personal and environmental protection.

The display is an I/O device belonging to a computer, namely an input/output device. It can be classified into CRT, LCD, PDP, OLED, etc. The electronic document display tool is a display tool which displays a certain electronic document on a screen through a specific transmission device and reflects the electronic document to human eyes. At present, electronic products or equipment such as computers and the like become essential tools for people to finish work and carry out entertainment and life, the importance of the display is self-evident, the display can generate electromagnetic radiation when working, harm is caused to human bodies, and a plurality of measures are added in the display product to reduce the electromagnetic radiation, wherein the electromagnetic shielding cover is included.

CN104812227A discloses that a high-performance electromagnetic compatibility shielding glass is additionally arranged between a display screen and a panel, so that electromagnetic leakage of an interference source inside equipment through a display window and the influence of external electromagnetism on the equipment are reduced; the shielding glass is bonded with the panel through the conductive adhesive, and the conductive layer of the shielding glass is tightly attached to the panel through the pressing plate, so that reliable conductive continuous connection is realized, and the shielding cover is welded with the panel, so that the continuity of materials is effectively ensured; the first shielding gasket and the second shielding gasket are arranged to increase the sealing performance of the display and effectively prevent radiation from scattering outwards, the structure can well protect the display screen from being interfered by a magnetic field and reduce the harm of the radiation of the display screen to a human body, but the structure mainly aims at the electromagnetic shielding of the display screen of the display and does not relate to the electromagnetic leakage of other parts of the display.

For the flip display, especially for the electric flip display, the necessary gap is designed between the rotating shaft and the equipment installation firmware due to the installation precision and the need of avoiding the friction resistance, so as to facilitate the flip of the display screen, but the gap also provides a path for the electromagnetic leakage, which affects the electromagnetic compatibility of the electric flip display.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the display with the electromagnetic sealing structure for the rotating shaft end gap is provided, an internal and external electromagnetic isolation environment is formed for an electromagnetic environment cavity where an internal functional circuit module of the electronic equipment is located, the equipment meets the electromagnetic compatibility requirement, and meanwhile, a good mechanical overturning function is guaranteed.

The technical scheme adopted by the invention for solving the technical problems is as follows: a display having an electromagnetic sealing structure for a gap between ends of a rotating shaft. The device comprises a rotating shaft, a device support fixing piece, a metal winding and a winding fixing retainer ring; the metal winding is sleeved on the rotating shaft, and the winding fixing retainer ring is used for limiting the position of the metal winding, so that the metal winding is filled in a gap between the rotating shaft and the equipment support fixing part, the metal winding is ensured to be effectively lapped with the rotating shaft and the equipment support fixing part, a conductive connector is formed, and the effect of isolating electromagnetic waves is achieved.

Further, the material of the metal winding is steel.

Preferably, the metal winding is an annular structure formed by winding a steel wire mesh, the aperture of the steel wire mesh is 0.5mm, a high-density honeycomb net structure can be formed in a gap between the rotating shaft and the equipment support fixing part, a plurality of electromagnetic reflection surfaces are generated, electromagnetic waves can be reflected, and the effect of isolating the electromagnetic waves is enhanced.

Furthermore, the wire diameter of the steel wire in the steel wire mesh of the metal winding is 0.1-0.5mm, the wire diameter is too small, the strength of the steel wire is not enough, the steel wire is easy to break, and the wire diameter is too large, which can cause the increase of the friction force between the winding and the equipment support fixing part and influence the overturning effect; preferably, the wire diameter of the steel wire in the steel wire mesh of the metal winding is 0.2mm, so that the steel wire winding can be ensured to have good flexibility and strength, and the overturning effect of the display is not influenced.

Furthermore, the surface of the equipment support fixing part is subjected to conductive oxidation, so that the electric connection effect between the equipment support fixing part and the rotating shaft and the metal winding is better realized.

Furthermore, the winding retaining ring is a cylindrical hollow sleeve, the inner diameter of the winding retaining ring is matched with the outer diameter of the rotating shaft, and the winding retaining ring is sleeved on the rotating shaft.

Furthermore, the winding fixing retainer ring is made of stainless steel, a threaded hole is formed in the cylindrical surface of the winding fixing retainer ring, and the winding fixing retainer ring is fastened on the rotating shaft through screws.

The invention has the beneficial effects that: because the flexibility of the network structure of the winding, cause the friction between axis of rotation and the winding very little, can not form big resistance and then weaken the upset ability of electronic upset display to the axis of rotation moment of torsion, the winding that network structure wound simultaneously, the clearance space between the filling machinery rotating part has formed a plurality of electromagnetic reflecting surfaces, and the electromagnetic shield is better, can effectively reach the effect of keeping apart the electromagnetic wave, improves the electromagnetic compatibility of equipment.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a bottom view of an embodiment of the present invention;

FIG. 3 is a schematic plan view of a metal winding deployment according to an embodiment of the present invention;

FIG. 4 is a schematic perspective view of a metal winding formed by winding according to an embodiment of the present invention

In the figure: 1-equipment support fixing part, 2-rotating gap, 3-rotating shaft, 4-circuit module, 5-electromagnetic environment cavity, 6-display screen, 7-metal winding, 8-winding fixing retainer ring and 9-threaded hole.

Detailed Description

The invention is further explained with reference to the drawings and the embodiments.

As shown in fig. 1 to 4, the present embodiment is a display having an electromagnetic sealing structure for an end gap of a rotating shaft, and includes an apparatus bracket fixing member 1, a rotating gap 2, a rotating shaft 3, a circuit module 4, an electromagnetic environment cavity 5, a display screen 6, a metal winding 7, a winding fixing retaining ring 8, and a threaded hole 9.

The metal winding 7 of the embodiment is made of a steel wire mesh, the wire diameter of the steel wire mesh is 0.2mm, the aperture of the steel wire mesh is 0.5mm, the steel wire mesh is wound into a ring, the inner diameter of the steel wire mesh ring is the same as the diameter of the rotating shaft 3, and the number of winding turns is determined according to actual conditions, so that the rotating gap 2 can be filled with the metal winding 7 after the rotating shaft 3 is provided with the metal winding 7; winding retaining ring 8 is cylindrical stainless steel hollow sleeve, be equipped with screw hole 9 on winding retaining ring 8's the face of cylinder, can be through screw fastening on axis of rotation 3, a position for restricting metal winding 7, make metal winding 7 be arranged in rotating gap 2 between axis of rotation 3 and equipment support firmware 1, ensure that metal winding 7 and axis of rotation 3 and equipment support firmware 1 are effective overlap joint, form the electrically conductive connector, rotating gap 2 is filled with similar honeycomb netted circle form by metal winding 7 like this, its inside a plurality of electromagnetic reflection faces that have formed, the electromagnetic shield effect has been improved, make electromagnetic environment chamber 5 in the display well keep apart with external electromagnetic environment.

The equipment support fixing member 1 of the present embodiment is electrically oxidized on the surface of the connection portion with the rotating shaft 3, and thus the electrical connection effect with the rotating shaft and the metal winding 7 is better achieved.

When the general display works, each internal functional circuit module 4 will work under the inherent electromagnetic environment of the electromagnetic environment cavity 5 in the display, a rotating gap 2 exists between the rotating shaft 3 of the display and the equipment support fixing member 1, the rotating gap 2 provides a path for electromagnetic leakage, so that external electromagnetic waves can easily enter the display through the rotating gap 2 to affect the normal work of the internal circuit module 4, in this embodiment, the rotating gap 2 is filled with a steel wire winding 7, the rotating shaft 3 is contacted with multiple ends of the equipment support fixing member 1 to form 360-degree omnibearing electrical connection, and a honeycomb-like mesh structure formed by the steel wire winding forms a plurality of electromagnetic reflecting surfaces, can reach an electromagnetic shielding efficiency of more than 90db, effectively realize the transmission path of the electromagnetic waves, and the purpose of cutting off the electromagnetic waves, and meet the electromagnetic sensitivity requirement of the display equipment, and because the flexibility of the steel wire winding does not influence the normal overturn of the display screen 6.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention, and it is intended to cover in the appended claims all such modifications, variations, equivalents, and uses of the inventive structure or method for other electronic devices to achieve the same results.

Claims

1. A display with a rotating shaft end gap electromagnetic sealing structure is characterized in that: the device comprises a rotating shaft (3), a device support fixing piece (1), a metal winding (7) and a winding fixing retaining ring (8), wherein the metal winding (7) is sleeved on the rotating shaft (3), and the winding fixing retaining ring (8) is used for limiting the position of the metal winding (7) so that the metal winding (7) fills a gap between the rotating shaft (3) and the device support fixing piece (1); metal winding (7) adopt the wire net coiling lopping that the aperture is 0.5mm, and the internal diameter of this wire net circle is the same with the diameter of axis of rotation (3), and the number of winding turns is confirmed according to the size in the clearance between axis of rotation (3) and equipment support firmware (1), makes axis of rotation (3) suit metal winding (7) back, and metal winding (7) are filled the clearance between axis of rotation (3) and equipment support firmware (1).

2. A display having an electromagnetic sealing structure with a rotating shaft end gap as defined in claim 1, wherein: the diameter of the steel wire in the steel wire mesh forming the metal winding (7) is 0.1-0.5 mm.

3. A display having an electromagnetic sealing structure with a rotating shaft end gap as defined in claim 1, wherein: the diameter of the steel wires in the steel wire mesh forming the metal winding (7) is 0.2 mm.

4. A display having an electromagnetic sealing structure with a rotating shaft end gap as defined in claim 1, wherein: and conducting oxidation is carried out on the surface of the equipment support fixing part (1).

5. A display having an electromagnetic sealing structure with a rotating shaft end gap as defined in claim 1, wherein: the winding retaining ring (8) is a cylindrical hollow sleeve, the inner diameter of the winding retaining ring is matched with the outer diameter of the rotating shaft (3), and the winding retaining ring (8) is sleeved on the rotating shaft (3).

6. A display having an electromagnetic sealing structure with a rotating shaft end gap according to claim 5, wherein: the winding fixing retainer ring (8) is made of stainless steel.

7. A display having an electromagnetic sealing structure with a rotating shaft end gap according to claim 5, wherein: and the cylindrical surface of the winding fixing retainer ring (8) is provided with a threaded hole (9), and the winding fixing retainer ring (8) is fixed on the rotating shaft (3) through a screw.