CN205454371U

CN205454371U - Shield cover

Info

Publication number: CN205454371U
Application number: CN201521130413.8U
Authority: CN
Inventors: 刘飞
Original assignee: Chongqing Blue Bank Communication Technology Co Ltd
Current assignee: Chongqing Lanan Technology Co ltd
Priority date: 2015-12-30
Filing date: 2015-12-30
Publication date: 2016-08-10
Anticipated expiration: 2025-12-30

Abstract

The utility model provides a shield cover, it includes: a plurality of heat dissipation through -holes have been seted up to the shield cover body on it, the shell fragment, it sets up around the radio frequency device, wherein, it is just right on the shield cover body the position department of radio frequency device does not set up radiofrequency signal's shielding can be guaranteed to the heat dissipation through -hole, does not influence other chip heat dissipations simultaneously again. The utility model provides a shield cover, it only uses a shield cover to make on the mainboard, save shield cover's quantity and installation procedure, and simultaneously, the radio frequency device heat dissipation of shield cover below is few under most of in service behaviors, and need the signal shielding, top at the radio frequency device does not set up the heat dissipation through -hole, the heat dissipation through -hole is seted up to other positions, the signal shielding of radio frequency device had both been guaranteed, the heat dissipation of other chips has been guaranteed again, and simultaneously, be provided with the shell fragment around the radio frequency device, can further put forward the high shield effect.

Description

A kind of screening cover

Technical field

This utility model belongs to electronic product accessory field.More specifically, this utility model relates to a kind of screening cover.

Background technology

Along with the continuous development and progress of society, the electronic product function of mobile phone plane plate etc also gets more and more.Along with increasing and the continuous enhancing of performance of function, the power consumption of mobile phone is the most increasingly come the biggest, the mobile phone heat dissipation problem that before thus, the function machine epoch are the most less paid attention to, in the design of current electronic product more and more important, Ge great development & production producer all makes product dispel the heat the most faster moving heaven and earth as far as possible, it is to avoid the safety problem caused because product in use self-temperature is too high.In electronic product; it is easiest to give out usually power management chip and the central processor core of heat; in most electronic product, disturbing and ESD problem to preferably protect the EMI of device on mainboard, this two large chip is the most all placed in inside screening cover.The heat the most effectively these chips produced quickly is led away by the screening cover of top, has also reformed into an effective way solving product heat dissipation problem.Meanwhile, the radio-frequency devices that mainboard is arranged needs the shielding designing other screening cover to ensure signal, and therefore one piece of mainboard at least needs 2 screening covers.It addition, develop a few money similar products on same chip platform, owing to the coupling small powder quantity around acp chip or goods of furniture for display rather than for use are relative to position slightly difference, current way is that these a few money similar products all individually die sinking design screening cover shape is allowed to mate.

The general shield lid that electronic product is relatively common at present mainly has following several:

As it is shown in figure 1, a kind of totally enclosed screening cover, anti-interference shield effectiveness is preferable, and radiating effect is poor；

As in figure 2 it is shown, uniformly open aperture above screening cover, its perforate can make gaseous exchange, it is possible to play the effect of auxiliary heat dissipation, but anti-interference shield effectiveness is general.

Therefore, between heat radiation and shielding, find a balance to design screening cover and become particularly significant.

Utility model content

A purpose of the present utility model is to solve at least the above, and provides the advantage that at least will be described later.

The technical solution of the utility model is:

A kind of screening cover, comprising:

Screening cover body, it offers some thermal vias；

Shell fragment, it is arranged on the surrounding of radio-frequency devices, can improve shield effectiveness further；

Wherein, on described screening cover body, just position to described radio-frequency devices is not provided with described thermal vias, it is ensured that the shielding of radiofrequency signal, does not the most affect the heat radiation of other main heater members simultaneously.

Preferably, in described screening cover, described shell fragment is multi-disc, and has interval between the lower surface of described shell fragment and described screening cover body.

Preferably, described screening cover also includes at least one opening, and it is arranged on the side of described screening cover body, will not be pressed onto the electric elements of the coupling of lower section.

Preferably, in described screening cover, the height of described opening, more than the height of coupling electric elements below, can accommodate the coupling electric elements of lower section completely.

Preferably, in described screening cover, the length of described opening, more than the length of coupling electric elements below, will not snap into these electric elements.

Preferably, in described screening cover, one or several the combination being shaped as in rectangle, square, triangle, trapezoidal, semicircle, arc of described opening, can be designed according to the shape of electric elements.

The screening cover that this utility model provides, make only to use a screening cover on mainboard, save installation procedure and screening cover quantity thus reduce the cost of product, simultaneously, radio frequency unit below screening cover dispels the heat less for chip in use, and need signal shielding, thermal vias it is not provided with above radio-frequency devices, thermal vias is offered in other positions, both ensure that the signal shielding of radio-frequency devices, in turn ensure that the heat radiation of chip, simultaneously, it is provided around shell fragment at radio-frequency devices, shield effectiveness can be improved further.

The screening cover that this utility model provides is also on the basis of conventional screening cover, the height adjusting screening cover four side is allowed to be formed an opening in side, then the area and the size that keep screening cover are constant, make it possible to and the public production mould of screening cover before, i.e. it is possible to prevent on mask frame lid rear and lower section small powder contact short circuit, the guarantee mask frame side that can also try one's best complete, it is ensured that the shielding action of signal.

R&D process can develop a few money similar products on same chip platform simultaneously, these a few money products are owing to being same platform, therefore can ensure that the relative position of main devices (the referring mainly to chip class device) quantity of chip circumference and goods of furniture for display rather than for use is roughly the same, only possible appearance is different, main is exactly that the small powder mated is different, these small powders are the most all the devices of some capacitance-resistance senses etc, are not the most the highest (comparing chip low many).If using the screening cover that four conventional sides are the highest, screening cover size is unregulated, is once assembled on plank, and side is easily pressed onto the small powder of lower section, causes the small powder short circuit of lower section, there is the safety problem in motherboard design.nullTherefore screening cover of the present utility model can be used，Once find to there is device on PCB goods of furniture for display rather than for use below screening cover surrounding side，The height of screening cover surrounding side can be adjusted，Need not keep the highly consistent of surrounding side，Below side, i.e. there is the position of small powder，Height and length in its corresponding side surface are adjusted shortening，It is allowed to be formed an opening in side，Below the aspect ratio shortened, the maximum height of small powder is slightly higher，The length shortened is more slightly longer than lower section small powder domain of the existence，Can be on the premise of the size holding of screening cover be constant after being so adjusted，As long as the core devices below screening cover (mainly chip class) is consistent，Even if goods of furniture for display rather than for use position slightly adjusts，Still can use on the different product of same chip development platform in the case of there are differences，Need not the extra a brand-new screening cover that designs and deacclimatize the size in whole goods of furniture for display rather than for use region.

The additionally aperture position of the screening cover side that this utility model provides, openings of sizes and open amount are not fixed, and whether can there is gadget according to the vertical lower of screening cover surrounding side on actual development mainboard and be adjusted.Can ensure that when developing a few money product of same chip platform, use the screening cover of same size as far as possible, save design die sinking cost and the cycle of screening cover.

Part is embodied by further advantage of the present utility model, target and feature by description below, and part also will be by being understood by the person skilled in the art research of the present utility model and practice.

Accompanying drawing explanation

Fig. 1 is the structural representation of existing fully closed screening cover；

Fig. 2 is the structural representation of the existing screening cover with thermal vias；

The structural representation of the screening cover that Fig. 3 provides for this utility model；

The cross-sectional view of the screening cover that Fig. 4 provides for this utility model.

Detailed description of the invention

Below in conjunction with the accompanying drawings this utility model is described in further detail, to make those skilled in the art can implement according to this with reference to description word.

Should be appreciated that used herein such as " have ", other element one or more or the existence of a combination thereof or interpolation do not allotted in " comprising " and " including " term.

As shown in Figure 3 and Figure 4, a kind of screening cover, comprising:

Screening cover body 1, it offers some thermal vias 2；

Shell fragment 3, it is arranged on the surrounding of radio-frequency devices 4, can improve shield effectiveness further；

Wherein, described screening cover body 1 is just not provided with described thermal vias to the position of described radio-frequency devices 4, it is ensured that the shielding of radiofrequency signal, does not the most affect the heat radiation of other chips simultaneously.

In described screening cover, described shell fragment 3 is multi-disc, and has interval between the lower surface of described shell fragment 3 and described screening cover body 1.

Described screening cover also includes at least one opening 5, and it is arranged on the side of described screening cover body 1, will not be pressed onto the electric elements of the coupling of lower section.

In described screening cover, the height of described opening 5, more than the height of coupling electric elements below, can accommodate the coupling electric elements of lower section completely.

In described screening cover, the length of described opening 5, more than the length of coupling electric elements below, will not snap into these electric elements.

In described screening cover, one or several the combination being shaped as in rectangle, square, triangle, trapezoidal, semicircle, arc of described opening 5, can be designed according to the shape of electric elements.

Although embodiment of the present utility model is disclosed as above, but it is not restricted in description and embodiment listed utilization, it can be applied to various applicable field of the present utility model completely, for those skilled in the art, it is easily achieved other amendment, therefore, under the general concept limited without departing substantially from claim and equivalency range, this utility model is not limited to specific details and shown here as the legend with description.

Claims

1. a screening cover, it is characterised in that including:

Screening cover body, it offers some thermal vias；

Shell fragment, it is arranged on the surrounding of radio-frequency devices；

Wherein, on described screening cover body, just position to described radio-frequency devices is not provided with described thermal vias.

2. screening cover as claimed in claim 1, it is characterised in that described shell fragment is multi-disc, and has interval between the lower surface of described shell fragment and described screening cover body.

3. screening cover as claimed in claim 2, it is characterised in that also include: at least one opening, it is arranged on the side of described screening cover body, and the height of described opening is less than the height of described screening cover.

4. screening cover as claimed in claim 3, it is characterised in that the height of described opening is more than the height of coupling electric elements below.

5. screening cover as claimed in claim 4, it is characterised in that the length of described opening is more than the length of coupling electric elements below.

6. screening cover as claimed in claim 5, it is characterised in that one or several the combination being shaped as in rectangle, square, triangle, trapezoidal, semicircle, arc of described opening.