CN2532521Y

CN2532521Y - CPU grounding elestic piece

Info

Publication number: CN2532521Y
Application number: CN 01202271
Authority: CN
Inventors: 林德政
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-02-22
Filing date: 2001-02-22
Publication date: 2003-01-22
Anticipated expiration: 2011-02-22

Abstract

Disclosed is a CPU grounding resilient sheet which a body; one end of the body is extended and bent into a butt part, a retaining part is arranged at the lower outside surface of the body, and a clamping part is arranged at the lower inside surface of the body; hereby, the CPU grounding resilient sheet is inserted at a position near a CPU on a PCB; when radiating fins are assembled on the CPU, the butt part is contacted with the radiating fins to ensure the radiating fins to be in the grounding state, so the CPU electromagnetic interference can be effectively reduced.

Description

The CPU grounding elastic part

The utility model relates to a kind of grounding elastic part, particularly a kind of CPU grounding elastic part that can effectively reduce CPU electromagnetic interference problem on the printed circuit board (PCB).

Development in science and technology is maked rapid progress, and digital electronic product is inseparable with our life, for example, and computing machine, communication product or video and audio product etc.These products are for improving quality and function, and operating frequency is more and more higher, yet the electromagnetic pollution that high frequency produced also seriously threatens flight, communication or household's safety.

In view of this, national governments are for " Electro Magnetic Compatibility (EMC, Electro MagneticCompatibility) " all strictly control of electronic motor product, so how in the performance history of electronic product, obtaining various countries' " Electro Magnetic Compatibility " authentication fast, also is one of important topic.

Along with operating frequency day by day improves, the transistor that central processing unit (CPU) includes has reached millions of combination, and frequency has reached GHz (10 ⁹Hz), add very big power consumption, so CPU has caused great high-frequency electromagnetic interference problem when operating.

In addition, can produce high heat when operating because of CPU, so need finned, use heat is shed fast, but the electromagnetic field that CPU is produced during because of working at high speed, but easily because of the stray capacitance between heat radiator and CPU (Parastic Capacitor) coupling (Coupling) to heat radiator, the width of cloth shoots out via the antenna effect of heat radiator again, cause serious electromagnetic interference (EMI) (EMI, Electro Magnetic Interference) problem.

Therefore, if will solve above problem, mode can be with heat radiator ground connection, to shield the electromagnetic field that the CPU institute width of cloth is penetrated preferably; Though heat radiator can be formed ground connection with lock screw fashion and printed circuit board (PCB), to consider with regard to the angle of assembling, its dismounting is time-consuming and inconvenient for the user.

In view of this, fundamental purpose of the present utility model, just be to solve above-mentioned disappearance, avoid the existence that lacks, the utility model is by a plurality of metal lamellar bodies of being located at printed circuit board (PCB) CPU periphery, when groups of fins is loaded on the CPU, promptly simultaneously make butt with the utility model, just can reach the purpose of ground connection easily.

Another purpose of the present utility model is to utilize plug-in type (Dip) or surface adhering technology (SMD) or other mode that is fit to (as welding or clamping), it is combined with printed circuit board (PCB), to reach the purpose that is easy to assemble.

The utility model provides a kind of CPU grounding elastic part, it has a body, one end of this body extends bending and forms an abutting part, has a stopper section at this body hypomere lateral surface place, and in the body medial surface place of this below, stopper section, has a fastener, by this, it is inserted in CPU vicinity on the printed circuit board (PCB), when groups of fins is loaded on CPU when going up, this abutting part and heat radiator touch, and make heat radiator ground connection.

The utility model also provides a kind of printed circuit board (PCB) of the CPU of reduction electromagnetic interference (EMI), it comprises a printed circuit board (PCB) and a plurality of members such as shell fragment that are inserted in CPU periphery on this printed circuit board (PCB), when groups of fins is loaded on the CPU, this shell fragment promptly contacts with heat radiator, form ground state, its spy is: this shell fragment has a body, the one end extension of this body is bent to form an abutting part, this body hypomere lateral surface place has a stopper section, and the body medial surface place in this below, stopper section has a fastener, by this, it is inserted in CPU vicinity on the printed circuit board (PCB), when groups of fins is loaded on the CPU, the abutting part of shell fragment slightly can be pressed, by the elastic force of this abutting part, make the part driving fit more that abutting part contacts with heat radiator, the electromagnetic field of penetrating with the shielding CPU institute width of cloth.

Relevant detailed description of the present utility model and technology contents now just cooperate graphic being described as follows:

Fig. 1-1 is a stereoscopic synoptic diagram of the present utility model;

Fig. 1-2 is a schematic side view of the present utility model;

Fig. 2-1 is a user mode synoptic diagram one of the present utility model;

Fig. 2-2 is a user mode synoptic diagram two of the present utility model;

Fig. 2-3 is a user mode synoptic diagram three of the present utility model;

Fig. 2-4 is a user mode synoptic diagram four of the present utility model;

Fig. 2-5 is a user mode synoptic diagram five of the present utility model.

Piece mark illustrates 13 fasteners, 14 gaps, 1 body 11 abutting parts, 12 stopper sections, 2 printed circuit board (PCB) 21CPU, 22 jacks, 3 heat radiator

See also shown in Fig. 1-1, the 1-2, the utility model is to become a body 1 by the bending of metal lamellar body (as beryllium copper, phosphor bronze, stainless steel etc.) one, one end of this body 1 extends bending and forms an abutting part 11, at this body hypomere, system is via the mode of the broken folding of punching press, form a stopper section 12 to the bending of body 1 lateral surface place, and in these 12 belows, stopper section, also utilize the mode of punching press, form a fastener 13 to the bending of body 1 medial surface, and this

stopper section

12 and 13 of fasteners has suitable gap 14.

As Fig. 2-1,2-2,2-3, shown in 2-4 and the 2-5, CPU21 peripheral region on this printed circuit board (PCB) 2, be provided with a plurality of jacks 22 that run through printed circuit board (PCB) 2, use for the utility model and plant, when the utility model uses the mode group of plug-in type (Dip) to be fixed on the printed circuit board (PCB) 2, at first, the bottom alignment receptacles 22 of body 1 is inserted, at this moment, the slightly compression of this fastener 13, treat that fastener 13 is by behind the jack 22, can return back to default state, and form the state that card ends, and because above-mentioned gap 13 when just equaling the thickness of printed circuit board (PCB) 2, the end face that terminates in printed circuit board (PCB) 2 is promptly just supported in this stopper section 12, so, can make the utility model fixedly be inserted in the periphery of CPU21 on the printed circuit board (PCB) 2 by this fastener 13 with stopper section 12, and also can use the mode of surface adhering technology (SMD) or welding, allow the utility model group be fixed on the CPU periphery of printed circuit board (PCB) 2.

At this moment, when heat radiator 3 is assembled on the CPU21, heat radiator 3 can touch mutually with abutting part 11, and abutting part 11 slightly pressed, and make heat radiator 3 form the state of ground connection, and by the elastic restoring force of this abutting part 11, the part driving fit more that allows abutting part 11 contact with heat radiator 3, to increase its conduction (leading to) property, so can effectively shield the electromagnetic field that the CPU institute width of cloth is penetrated, and reach the purpose that reduces electromagnetic radiation.

Claims

1. CPU grounding elastic part, it is characterized in that having a body (1), one end of this body (1) extends bending and forms an abutting part (11), the place has a stopper section (12) at this body (1) hypomere lateral surface, and body (1) medial surface place in this stopper section (12) below, has a fastener (13), by this, it is inserted in CPU (21) vicinity on the printed circuit board (PCB) (2), when heat radiator (3) is assembled on the CPU (21), this abutting part (11) touches with heat radiator (3), makes heat radiator (3) ground connection.

2. CPU grounding elastic part according to claim 1 is characterized in that, has a suitable gap (14) between this stopper section (12) and fastener (13).

3. CPU grounding elastic part according to claim 1 is characterized in that, this shell fragment system is formed by the metal material bending.

4. CPU grounding elastic part according to claim 2 is characterized in that, the distance of this gap (14) just is the thickness of printed circuit board (PCB) (2).

5. CPU grounding elastic part according to claim 3 is characterized in that, this metal material is copper facing, phosphor bronze or stainless steel.