CN2826910Y

CN2826910Y - Printed circuit board assembly

Info

Publication number: CN2826910Y
Application number: CN 200520018438
Authority: CN
Inventors: 杨曦晨
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2005-05-11
Filing date: 2005-05-11
Publication date: 2006-10-11
Anticipated expiration: 2015-05-11

Abstract

The utility model discloses an assembly of a printed circuit board, which aims to solve the problem that installing tracks can not be controlled effectively when a printed circuit board which is provided with a device is assembled in a box body in the prior art. The assembly of a printed circuit board comprises a printed circuit board, a box body used for fixedly installing the printed circuit board, guide posts which are fixed on the interior bottom face of the box body and guide holes which are arranged on the printed circuit board to cooperate with the guide posts, wherein the guide posts and the guide holes are used for limiting the installing tracks of the printed circuit board. The guide posts are perpendicular to the interior bottom face of the box body; a plurality of pairs of the guide post and the guide hole are arranged in the mode of dispersion; the guide posts are rivet press screw studs; the guide posts are cylinders, elliptical post bodies or square post bodies; the guide holes are elliptical holes or rectangular holes.

Description

A kind of printed circuit board assembly

Technical field

The utility model relates to printed circuit board, relates in particular to a kind of printed circuit board assembly of boxlike product.

Background technology

The boxlike product comprises standard boxlike product and non-standard boxlike product, and the standard boxlike is meant and can be installed in 19 inches racks, the 1U/2U boxlike cabinet of standard.Non-standard boxlike is meant that other have the non-standard boxlike cabinet of boxlike outward appearance, generally comprise functional module, terminal boxlike etc., wherein functional module mainly is meant isolated operation or for product provides the cassette module of certain function, as power module, lightning arrester, blower module; The terminal boxlike mainly is meant the end product or the handheld terminal product (as mobile phone etc.) of boxlike outward appearances such as similar set-top box, fixed station.

As Fig. 1, shown in Figure 2, comprising printed circuit board (the Print Circuit BoardAssembly that device is installed, PCBA) in the various boxlike products, there is the side panel of the box body 1 of a class boxlike product to be provided with opening 3, for the interface device 4 on printed circuit board 2 limits provides outlet, the process that printed circuit board is installed in box body 1 is: at first PCBA is put on the self-clinching standoff of box body bottom, then horizontal sliding one segment distance makes edges of boards interface device 4 pass corresponding opening 3 on the panel backward, with screw PCBA is fastened on the self-clinching standoff of box body 1 bottom at last.

In PCBA practical set process, the back also has a process that pushes away on the self-clinching standoff of box body bottom because PCBA is placed on, and can cause self-clinching standoff device on every side in the PCBA back side to be touched down; Simultaneously in the assembling process,, tilt but not vertically PCBA is put into the box body bottom downwards, can cause PCBA back side device and box body edge to scrape and wipe part because operate lack of standardizationly.

Be touched down in order to solve PCBA back side self-clinching standoff device on every side, as shown in Figure 2, the common practice is around the screw mounting hole 5 of PCBA back side self-clinching standoff correspondence now, and the movement locus when assembling according to PCBA is provided with certain taboo cloth district 6.

The shortcoming of prior art one is:

1, at PCBA in the process of pusher owing to can not limit the motion track of PCBA, PCBA can vacillate now to the left, now to the right and rock, and makes the edges of boards interface device be difficult to insert in the opening of panel, has strengthened assembly difficulty;

2, at PCBA in the process of pusher, owing to can not limit the motion track of PCBA, PCBA can vacillate now to the left, now to the right and rock, prohibit the cloth district even around the screw mounting hole of PCBA back side self-clinching standoff correspondence, set, if but the vacillate now to the left, now to the right amplitude of rocking of PCBA is excessive in the assembling process, also can cause the device around the self-clinching standoff of the PCBA back side to be touched down;

3, in assembling process, PCBA is tilted but not when putting into the box body bottom straight down, can cause PCBA back side device and box body edge to scrape and wipe part because operation is lack of standardization.

The utility model content

The utility model discloses a kind of printed circuit board assembly, when fitting into box body, can't effectively control the problem that track is installed to solve the printed circuit board that device will be installed in the prior art.

A kind of printed circuit board assembly, the box body that comprises printed circuit board and this printed circuit board of fixed installation, be fixed on the lead on this box body inner bottom surface, with the slotted hole that is arranged on this lead of cooperation on this printed circuit board, this lead and slotted hole are in order to limit the installation track of this printed circuit board.

Vertical this box bottom of described lead; Described lead and slotted hole are at least two pairs of the dispersion setting; Described lead is a self-clinching standoff; Described lead is cylinder, oval cylinder or square body; Described slotted hole is elliptical aperture or slot.

The beneficial effects of the utility model are:

Positioning and guiding problem when 1, having solved boxlike product P CBA assembling makes things convenient for the assembling of this type of boxlike product P CBA plate;

When 2, having prevented boxlike product P CBA assembling, part is fallen in the collision of PCBA back side device and self-clinching standoff;

When 3, having prevented boxlike product P CBA assembling, PCBA back side device and box body edge are scraped and are wiped part.

Description of drawings

Fig. 1 box body surface structure schematic diagram;

Fig. 2 is existing printed circuit board structural representation;

Fig. 3 has the box body structure schematic diagram of lead for inner bottom surface described in the utility model;

Fig. 4 is the printed circuit board structural representation that has pilot hole described in the utility model.

Embodiment

Technical conceive of the present utility model is: open slotted hole and box body bottom and add lead and be used on PCB, the guide-localization of realizing PCBA when assembling to be to make things convenient for the assembling of PCBA, can also limit PCBA and vacillate now to the left, now to the right and rock and run into PCBA bottom device by the self-clinching standoff of box body bottom; Can guarantee that simultaneously PCBA can only vertically put into the box body bottom, to avoid PCBA to tilt to put into box body bottom rear device and the part problem of wiping is scraped at the box body edge.

The utility model structure comprises two parts: one is the slotted hole on the pcb board 7 as shown in Figure 3, and it two as shown in Figure 4 is the lead 8 of box body 1 bottom, describes in detail below.

As shown in Figure 3, during the PCB design, on PCB, design two slotted holes 7 near interface device 4 sides, about the maximum gauge about 0.5mm of the width of slotted hole 7 than the lead 8 of box body bottom, it is fixed that the length of slotted hole 7 is come to the distance of pusher according to needs in the PCBA assembling process, in general, slotted hole 7 at least approximately about 3mm, is provided with rational taboo cloth district 6 on the PCB than this advance simultaneously.

As shown in Figure 4, according to the position and the size of slotted hole on the veneer, at the lead 8 of box body 1 bottom design and slotted hole coupling, during the PCBA assembling, the lead 8 of box body bottom must enter the slotted hole 7 on the PCBA, thereby can accomplish then:

1, at PCBA in the process of pusher, can limit the motion track of PCBA, PCBA can not vacillate now to the left, now to the right and rock, and makes things convenient for edges of boards interface device 4 to insert in the opening 3 of panels with convenient for assembly;

2, at PCBA in the process of pusher, can limit the motion track of PCBA, PCBA can not vacillate now to the left, now to the right and rock, and sets around the screw mounting hole 5 of PCBA back side self-clinching standoff correspondence like this and reasonably prohibits cloth district 6, can avoid self-clinching standoff device on every side in the PCBA back side to be bumped by self-clinching standoff;

3, put into the process of box body bottom at PCBA, the lead 8 of box body bottom must enter the slotted hole 7 on the PCBA, can prevent that like this PCBA from tilting to enter box body, thereby avoid PCBA back side device and box body edge to scrape the part problem of wiping.

Slotted hole 7 on the PCB can be with the positioning and guiding hole slot of elliptical aperture or other form (moving as long as can limit lead) in a certain direction; Lead 8 can be the reference column of the various structures of self-clinching standoff and similar self-clinching standoff form, for example cylinder, cylindroid or square scapus etc.; The concrete structure of slotted hole and lead does not limit protection range of the present utility model; the lead quantity that while PCB goes up slotted hole and box body bottom determines according to actual conditions; be traditionally arranged to be two, when be provided with many to the time, the rationally distributed dispersion setting of going up device according to PCB.

The beneficial effects of the utility model are:

The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.

Claims

1, a kind of printed circuit board assembly comprises printed circuit board and the box body that fixedly mounts this printed circuit board; It is characterized in that, described printed circuit board assembly also comprises: be fixed on the lead on this box body inner bottom surface, with the slotted hole that is arranged on this lead of cooperation on this printed circuit board, this lead and slotted hole are in order to limit the installation track of this printed circuit board.

2, printed circuit board assembly as claimed in claim 1 is characterized in that, vertical this box bottom of described lead.

3, printed circuit board assembly as claimed in claim 1 or 2 is characterized in that, described lead and slotted hole are at least two pairs of the dispersion setting.

4, printed circuit board assembly as claimed in claim 1 is characterized in that, described lead is a self-clinching standoff.

5, printed circuit board assembly as claimed in claim 4 is characterized in that, described lead is cylinder, oval cylinder or square body.

6, printed circuit board assembly as claimed in claim 1 is characterized in that, described slotted hole is elliptical aperture or slot.