CN201213344Y

CN201213344Y - Fixing device for heat radiator of slave printed circuit board

Info

Publication number: CN201213344Y
Application number: CNU2008201142508U
Authority: CN
Inventors: 杨世林; 秦海燕
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2008-06-12
Filing date: 2008-06-12
Publication date: 2009-03-25
Anticipated expiration: 2018-06-12

Abstract

The utility model discloses a fixed installation of a radiator of a secondary printed wiring board, comprising at least two fixed units. Each fixed unit comprises studs and a perforative radiator; a spring and a cushion cover are respectively arranged on the studs at both sides of the radiator so as to keep the radiator and the studs together. One end of each stud is a secondary printed wiring board connecting end, and the other end is a primary printed wiring board connecting end. The utility model not only can fix a secondary PCB with the radiator, but also can fix the secondary PCB with a primary PCB so as to integrate two original installing studs on the secondary PCB, reduce the number of parts and mounting holes, greatly improve the utility ratio of the distribution space on the secondary PCB, improve the assembly efficiency and reduce the assembly cost.

Description

The fixture of sub-printed wiring board radiator

Technical field

The utility model relates to communication and electronic technology field, more specifically, relates to the fixture of a seed printed wiring board radiator.

Background technology

The application of printed wiring board (Printed Circuit Board abbreviates PCB as) is extremely extensive.At present, in communication and electronic equipment, the structural relation that has sub-PCB and female PCB, with the dilatation that realizes female PCB and the expansion of function, existing mounting structure is that the middle of sub-PCB and female PCB uses double-screw bolt (distance between female PCB and the sub-PCB is spacing h), fixes with screw at sub-PCB and female PCB both sides respectively.For on the sub-PCB radiator being arranged, when particularly radiator area is big, need convenient sub-PCB and radiator are pulled down to safeguard.Existing technical scheme is that sub-PCB and female PCB hold-down screw (as shown in Figure 1) and sub-PCB and radiator hold-down screw (as shown in Figure 2) be not at same position, the shortcoming of this technical scheme is that sub-PCB screwing installing hole is a lot, and installing hole need stagger mutually, it is big to take up room, influence wiring and the device layout of sub-PCB, also influence efficiency of assembling simultaneously.

The utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, and the fixture of a seed printed wiring board radiator is provided, its compact conformation, easy to maintenance, reliability is high.

For reaching this purpose, the utility model provides the fixture of a seed printed wiring board radiator, and it comprises at least two fixed cells, and each fixed cell comprises: double-screw bolt, run through radiator; And spring and cushion cover, divide on the double-screw bolt of the both sides that are located at radiator, so that radiator and double-screw bolt are kept together, wherein, double-screw bolt one end is sub-PCB link, the other end is female PCB link.

Preferably, female PCB link of above-mentioned double-screw bolt forms the backstop step, and an end of spring is against the backstop step, and the other end is to the radiator bias voltage.

Preferably, the sub-PCB link of above-mentioned double-screw bolt forms expanding riveting part, and cushion cover is riveted on the riveting part.Selectively, cushion cover is bolted on the double-screw bolt, and perhaps cushion cover is welded on the described double-screw bolt.

Preferably, the distance between above-mentioned female PCB link and the sub-PCB link equals the mounting distance of the connector between sub-PCB and the female PCB.

Spring in the utility model plays after radiator is installed on the sub-PCB, makes radiator float to the pressure of chip, guarantees that radiator contacts with the reliable of chip surface by heat conductive pad or heat-conducting silicone grease.

After radiator assembling in the utility model was finished, elder generation was pressed in radiator on the sub-PCB chip and fixes with screw and sub-PCB, and the sub-PCB that radiator will be installed then is inserted on female PCB, and with screw PCB and female PCB is fixed, and finishes assembling.

Structure of the present utility model is applicable on the sub-PCB structure or other similar structures of band radiator in communication and the electronic equipment.

The beneficial effects of the utility model are: according to the fixture of sub-PCB radiator of the present utility model, can realize that the radiator on sub-PCB and the chip fixes, can solve fixing between sub-PCB and the female PCB again, with two kinds on the sub-PCB double-screw bolt being installed effectively unites two into one, thereby making sub-PCB go up the arrangement space utilance improves greatly, efficiency of assembling is higher, and reliability is higher, and cost is lower.

Be noted that the description and the following detailed description all are exemplary, being intended to provides further instruction to desired the utility model.

Except purpose described above, feature and advantage, the utility model also has other purpose, feature and advantage.Below with reference to figure, other purpose, feature and effect of the present utility model is described in further detail.

Description of drawings

Accompanying drawing is used to provide further understanding of the present utility model, and constitutes the part of specification, is used from explanation the utility model with embodiment one of the present utility model, does not constitute restriction of the present utility model.In the accompanying drawings:

Fig. 1 is according to the sub-PCB of prior art and the scheme of installation of female PCB;

Fig. 2 installs the double-screw bolt schematic diagram according to the routine of the radiator of prior art and PCB;

Fig. 3 a is the structural representation according to the fixture of the sub-PCB radiator of the utility model preferred embodiment;

Fig. 3 b shows the scheme of installation of sub-PCB and female PCB, and wherein, sub-PCB and female PCB are installed together by the fixture shown in Fig. 3 a.

Embodiment

Be described in detail below in conjunction with the fixture of accompanying drawing below in conjunction with accompanying drawing sub-PCB radiator of the present utility model.

Fig. 1 is existing sub-PCB and female PCB scheme of installation.As shown in Figure 1, female PCB11 links to each other by middle conventional double-screw bolt 13 with sub-PCB12, fixes with screw 14 at sub-PCB and female PCB both sides respectively then.

Fig. 2 is that the routine between existing radiator and PCB is installed the double-screw bolt schematic diagram.By Fig. 2 double-screw bolt 21 is inserted in radiator 24 from radiator 24 reverse side, is inserted in spring 22 again, be screwed in the double-screw bolt 21 with screw 23 then, make double-screw bolt 21 and radiator 24 be fixed together.Then radiator 24 being pressed in needs chip 26 surfaces of dispelling the heat on the PCB25, pass PCB25 from the reverse side of PCB25 with screw 23 again and be screwed into the double-screw bolt 21, finishes the fixing of radiator and PCB.

Fig. 3 a is the structural representation of fixture of the sub-PCB radiator of the utility model preferred embodiment.After by Fig. 3 double-screw bolt 39 being inserted in spring 38, be inserted in the radiator 36 from radiator 36 fronts again, then cushion cover 37 is inserted in the head of double-screw bolt 39, reach riveted joint with cushion cover 37 with the head of special-purpose clincher tool spreading double-screw bolt 39 at last, notice that the riveted joint rear end face is smooth, double-screw bolt 39 is the interior span screw thread, can mounting screw from the double-screw bolt two ends, the height of riveted joint back double-screw bolt is spacing h, just in time is that sub-PCB inserts the height that will keep behind female PCB.

Fig. 3 b shows the scheme of installation of sub-PCB and female PCB, and wherein, sub-PCB and female PCB are installed together by the fixture shown in Fig. 3 a.The radiator 36 that fixes double-screw bolt 39 is pressed in needs chip 32 surfaces of dispelling the heat on the sub-PCB31, chip 32 surfaces will be pasted heat conductive pad or are coated with heat-conducting silicone grease before installing, with screw 33 that sub-PCB31 and radiator 36 is fixing then, the sub-PCB31 that radiator 36 will be installed then is inserted into female PCB35 and goes up in the corresponding connector body 34, and with screw PCB31 and female PCB35 are fixed, finish assembling.

Aforesaid fixture can be used on various electronics and the communication apparatus.

Compared with prior art, the double-screw bolt of the fixture of sub-PCB radiator of the present utility model by uniting two into one, solve sub-PCB should with radiator fixing again with the fixing problem of female PCB.

The above is a preferred embodiment of the present utility model only, is not limited to the utility model.For a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.

Claims

1. the fixture of a seed printed wiring board radiator is characterized in that, comprises at least two fixed cells, and each described fixed cell comprises:

Double-screw bolt runs through described radiator; And

Spring and cushion cover divide on the described double-screw bolt of the both sides be located at described radiator, so that described radiator and described double-screw bolt are kept together,

Wherein, described double-screw bolt one end is sub-printed wiring board link, and the other end is female printed wiring board link.

2. fixture according to claim 1 is characterized in that,

Female printed wiring board link of described double-screw bolt forms the backstop step, and an end of described spring is against described backstop step, and the other end is to described radiator bias voltage.

3. fixture according to claim 2 is characterized in that,

The sub-printed wiring board link of described double-screw bolt forms expanding riveting part, and described cushion cover is riveted on described riveting part.

4. fixture according to claim 2 is characterized in that,

Described cushion cover is spirally connected or is welded on the described double-screw bolt.

5. according to each described fixture in the claim 1 to 4, it is characterized in that,

Distance between described female printed wiring board link and the described sub-printed wiring board link equals the mounting distance of the connector between described sub-printed wiring board and the described female printed wiring board.