CN2618314Y

CN2618314Y - Surface Mount Ground Spring

Info

Publication number: CN2618314Y
Application number: CNU032515502U
Authority: CN
Inventors: 杨庆隆
Original assignee: Cateron Corp
Current assignee: LAIND ELECTRONIC MATERIAL (SHANGHAI) CO Ltd
Priority date: 2003-04-30
Filing date: 2003-04-30
Publication date: 2004-05-26
Anticipated expiration: 2013-04-30

Abstract

The utility model relates to a surface adhesion formula ground connection shell fragment, it includes first bending, second bending and third bending, wherein first bending and third bending are outwards extended from two arms of second bending respectively and are formed, first bending and third bending have respectively can be used for welding with the circuit board or carry out the cantilever that contacts with the ground contact, the cantilever of this first bending and third bending extends from first bending and third bending along the opposite direction with the extension of two arms of second bending respectively; the two arms of the second bend are inclined towards each other. The sum of a first gap between the cantilever of the first bend and the second bend and a second gap between the cantilever of the third bend and the second bend is equal to a third gap between the first bend and the third bend.

Description

The surface adhesive type grounding elastic part

Technical field

The utility model is about a kind of surface adhesive type grounding elastic part, especially a kind of surface adhering surface adhesive type grounding elastic part on circuit board, that have the maximum deformation quantity defencive function that is used for.

Background technology

Be installed on the circuit board along with increasing electronic component is integrated, be derived from numerous electronic components itself and the electromagnetic interference (EMI) that comes from the outside, electrostatic interference and noise interference just becoming puzzlement people in the industry's a difficult problem.At present, the method that addresses these problems mostly is to adopt the modes such as electromagnetic shielding shell, ground strip that are provided with.

The 5th, 537, No. 294 United States Patent (USP) has promptly disclosed a kind of IC-card device with grounding elastic part and upper and lower electromagnetic shielding shell, retained part in the middle of its grounding elastic part is provided with one, be used to clamp circuit board and with circuit board on corresponding ground pad electrically contact, with two contact arms that are located at these retained part both sides, centre, on the upper and lower electromagnetic shielding shell of can conflicting respectively.Like this, after this IC-card device assembles, formed a grounded circuit between electromagnetic shielding shell, grounding elastic part and the circuit board down thereon,, static, the noise that can immediately each electronic component on the circuit board be produced conduct in time by this grounded circuit, by the upper and lower electromagnetic shielding shell of its closure designs, guaranteed the anti-electromagnetic interference that it is good simultaneously.

Grounding elastic part can be to take mechanical systems such as buckle, clamping to be set on the circuit board, also can take surface adhering mode (SMT) to be fixed on the circuit board, by with circuit board on corresponding circuit design static or noise are conducted, thereby guarantee that each electronic component on the circuit board is able to operate as normal.

The surface adhesion type grounding elastic part usually be in advance by solid welding on the position that pre-sets on the circuit board, be mounted in the computer host box with circuit board again or the notebook computer casing in, directly can contact with the host computer casing, by the host computer shell static on the circuit board and noise are conducted and want, related art can be with reference to No. 508135 TaiWan, China patent of bulletin.

The disclosed grounding elastic part of this patent roughly is " ∑ " shape, and the arm of its both sides can be used for welding with circuit board and contacting with the host computer casing.But in the circuit board that will be provided with this grounding elastic part is installed to the host computer casing, this grounding elastic part is extruded, deforms in this assembling process probably; If corresponding operating physical force is excessive or angle out of strength is improper in this process, will make grounding elastic part that bigger crimp takes place, may therefore surpass the elastic limit of materials of this grounding elastic part, permanent deformation takes place, make it can't recover life size, thereby lose its ground connection effect.Sometimes, if in the assembling process moment firmly too big, even can this grounding elastic part be ruptured, so not only can't realize its grounding function; And the fragment of its fracture then may cause short circuit if drop on circuit board, and is serious even may cause circuit board to be burnt.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art; a kind of surface adhesive type grounding elastic part with maximum deformation quantity protective device is provided; it can carry out self maximum deformation quantity protection when being subjected to big external force, thereby guarantees the smooth realization of its ground connection effect.

Technical essential of the present utility model is: a kind of surface adhesive type grounding elastic part is provided, comprise first turn of bilge, second turn of bilge and the 3rd turn of bilge, wherein first turn of bilge and the 3rd turn of bilge stretch out from two arms of second turn of bilge respectively and form, first turn of bilge and the 3rd turn of bilge have respectively and can be used for the cantilever that welds or contact with earthing contact with circuit board, and the cantilever of this first turn of bilge and the 3rd turn of bilge extends from first turn of bilge and the 3rd turn of bilge along the rightabout that two arms with second turn of bilge extend respectively; Two arms of second turn of bilge have certain gradient toward each other.

Wherein, have first gap between the cantilever of first turn of bilge and second turn of bilge, have second gap between the cantilever of the 3rd turn of bilge and second turn of bilge, have third space between first turn of bilge and the 3rd turn of bilge; First gap and the second gap sum equal third space.

Two arms of first turn of bilge and the 3rd turn of bilge extend the first and the 3rd contact part towards second turn of bilge respectively.

Two arms of the utility model grounding elastic part second turn of bilge have certain gradient toward each other, and then when grounding elastic part was subjected to the external force extruding, this two arm was drawn close because of being extruded in opposite directions, abuts to mutually together until the first, the 3rd turn of bilge; At this moment, the first, the 3rd turn of bilge that is abutted against each other together is continuing under the stressed situation, can produce the extruding that reaction force is resisted external force immediately, produces the maximum deformation quantity protective effect thus, thereby guarantees the smooth realization of its ground connection effect.

Simultaneously; owing to have first gap between the cantilever of first turn of bilge and second turn of bilge; has second gap between the cantilever of the 3rd turn of bilge and second turn of bilge; has third space between first turn of bilge and the 3rd turn of bilge; and first gap and the second gap sum equal third space; first; the 3rd turn of bilge cantilever separately also can hold together by the arm rest to the second turn of bilge correspondence under the extruding of external force; until first; second contact part is resisted against on second turn of bilge; continuing under the stressed situation; also can produce the further squeezing action that the anti-power of appointing resists external force, can strengthen self maximum deformation quantity defencive function of this grounding elastic part like this.

Description of drawings

Fig. 1 is the schematic perspective view of the utility model grounding elastic part;

Fig. 2 is the front view of the utility model grounding elastic part;

Fig. 3 is the end view of the utility model grounding elastic part.

Embodiment

Now, the utility model surface adhesive type grounding elastic part is described in further detail in conjunction with Figure of description.

Figure 1 shows that the schematic perspective view of the utility model surface adhesive type grounding elastic part, be depicted as the utility model grounding elastic part 1, comprise first turn of bilge 10, second turn of bilge 14 and the 3rd turn of bilge 12, wherein first turn of bilge 10 and the 3rd turn of bilge 12 are respectively from two arms 17 of second turn of bilge 14,18 stretch out forms, first turn of bilge 10 and the 3rd turn of bilge 12 have respectively and can be used for the cantilever 11 that welds or contact with earthing contact with circuit board (not shown), 13, the cantilever 11 of this first turn of bilge 10 and the 3rd turn of bilge 12,13 respectively along with two arms 17 of second turn of bilge 14,18 rightabouts that extend extend from first turn of bilge 10 and the 3rd turn of bilge 12.

Two arms 17,18 of second turn of bilge 14 have certain gradient toward each other.Two arms 11,13 of first turn of bilge 10 and the 3rd turn of bilge 12 extend the first and the 3rd contact part 15,16 towards second turn of bilge 14 respectively.

When this grounding elastic part 1 is welded to circuit board, because two cantilevers 11,13 of grounding elastic part 1 first, the 3rd turn of bilge 10,12 have certain width respectively, therefore can choose at random cantilever 11 or 13 with this first or the 3rd turn of bilge as welding arm, adopt SMT technology or other suitable solder technology, grounding elastic part 1 corresponding welding arm is soldered on the circuit board position of corresponding design, and with cantilever of another relative not welding as contact arm.

Please consult Fig. 2 and Fig. 3 simultaneously, has the first gap A between the cantilever 11 of first turn of bilge 10 of the utility model grounding elastic part 1 and second turn of bilge 14, have the second gap B between the cantilever 13 of the 3rd turn of bilge 12 and second turn of bilge 14, have third space C between first turn of bilge 10 and the 3rd turn of bilge 12.

In addition, the bending radius of second turn of bilge 14 is greater than the bending radius of the first, the 3rd turn of bilge 10,12.When the bending radius of second turn of bilge 14 equaled 2 times the first or the 3rd turn of bilge 10 or 12 bending radius, the first gap A and the second gap B sum promptly can equal third space C.At this moment, the utility model grounding elastic part 1 will have best self maximum deformation quantity defencive function.

Two arms 17,18 of the utility model grounding elastic part 1 second turn of bilge 14 have certain gradient toward each other, then when grounding elastic part 1 is subjected to the external force extruding, this two arm 17,18 can be pressed in opposite directions earlier and be drawn close, and abuts to mutually together until the first, the 3rd turn of bilge 10,12; At this moment, the first, the 3rd turn of bilge 10,12 that is abutted against each other together is continuing under the stressed situation, can produce the extruding that reaction force is resisted external force immediately, produces the maximum deformation quantity protective effect thus, thereby guarantees the smooth realization of its ground connection effect.

Therefore; be subjected to the moment of maximum deformation quantity at grounding elastic part 1; the high drag part that second turn of bilge 14 and the first, the 3rd turn of bilge 10,12 will form jointly can form a maximum deformation quantity protection to grounding elastic part 1, and it is destroyed that the utility model grounding elastic part 1 is avoided.

Simultaneously; owing to have the first gap A between the cantilever 11 of first turn of bilge 10 and second turn of bilge 14; has the second gap B between the cantilever 13 of the 3rd turn of bilge 12 and second turn of bilge 14; has third space C between first turn of bilge 10 and the 3rd turn of bilge 12; and the first gap A and the second gap B sum equal third space C; first; the 3rd turn of bilge 10; 12 separately cantilevers 11; 13 also can be under the extruding of external force to the arm 17 of second turn of bilge, 14 correspondences; 18 draw close; until first; second contact part 15; 16 are resisted against on second turn of bilge 14; continuing under the stressed situation; also can produce the further squeezing action that the anti-power of appointing resists external force, can strengthen self maximum deformation quantity defencive function of this grounding elastic part 1 like this.

The utility model grounding elastic part 1 also can adopt welding manner method in addition to be set on the circuit board if cooperate the mechanically retained structural design of hangnail, grab and so on.

Claims

1. A surface-adhesive ground shrapnel, comprising a first bend (10), a second bend (14) and a third bend (12), wherein the first bend (10) and the third bend (12 ) respectively extend outward from the two arms (17, 18) of the second bend (14), the first bend (10) and the third bend (12) respectively have a The cantilevers (11, 13) in contact with the ground point, the cantilevers (11, 13) of the first bend (10) and the third bend (12) are respectively along the two arms (17, 17, 17) of the second bend (14). 18) The opposite direction of extension extends from the first bend (10) and the third bend (12); it is characterized in that the two arms (11, 13) of the second bend (14) face each other with a certain inclination Spend.

2. The surface-mounted ground shrapnel according to claim 1, characterized in that there is a first gap between the cantilever (17) of the first bend (10) and the second bend (14), and the third bend There is a second gap between the cantilever (18) of (12) and the second bend (14), and a third gap between the first bend (10) and the third bend (12).

3. The surface-mounted grounding shrapnel according to claim 2, wherein the sum of the first gap and the second gap is equal to the third gap.

4. The surface-adhesive ground shrapnel according to claim 1 or 3, characterized in that:

The two arms (11, 13) of the first bend (10) and the third bend (12) face respectively

The second bent portion (14) extends out of the first and third conflicting portions (15, 16).