CN2836408Y

CN2836408Y - Elastic stop plate with elastic cantilever on side wall

Info

Publication number: CN2836408Y
Application number: CN 200520106479
Authority: CN
Inventors: 陈惟诚
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-08-26
Filing date: 2005-08-26
Publication date: 2006-11-08
Anticipated expiration: 2015-08-26

Abstract

The utility model provides an elastic stop elastic sheet which has small volume and can prevent from being hooked, pulled, pressed from the side or pressed from the bottom. The utility model comprises two welding parts, two connecting parts, an elastic arm and a butting shielding part, wherein one side edge corresponding to each welding part is extended from two side walls; a concave notch is formed on one of the side walls along the connecting direction of the top edge and the bottom edge of the side wall; the two connecting parts are mutually have an interval and are respectively engaged with the lateral walls; the connecting walls surrounds an inner space with the side walls and the welding parts; the elastic arm is bent and extended from a concave edge of each side wall through the inner space and to protrude the top edge of each side wall; the butting shielding part is bent back to the inner space from the elastic arm. Because the elastic arm is extended and formed through the elastic arm and the butting shielding part is provided with an adsorbing surface, thereby, the area occupied by the elastic sheet is effectively reduced; the structures of the side walls, etc., protects the elastic arm from unnecessary side pressed damage.

Description

Sidewall is extended with the high shell fragment of ending of elastic arm

Technical field

The utility model relates to a kind of high shell fragment that ends, and particularly a kind of sidewall is extended with the high shell fragment of ending of elastic arm.

Background technology

The shell fragment system that general electronics industry is used always is with a sheet metal, for example copper sheet is bent into as base material, again with on for example surface mounting technology (Surface Mount Technology) solid welding to a circuit board, the elastic force that utilizes the metal material bending back of shell fragment own to be had, the usefulness that contacts when electrically connecting with circuit board as other assembly, for example ground connection (Grounding), electromagnetism (EMI, electro-magneticinterference) protection waits the binding of effect, even can be as the usefulness of the buffering of Mechanical Contact.

Consult Fig. 1, morning commonly use shell fragment 6 since this opening 64 without any obstruction, not only in the storage handling process, foreign matter enters this shell fragment opening 64 easily, causes the deformation of elastic arm 62 or connecting section 63 through pullling.In addition, after this shell fragment 6 is installed on circuit board, when moving circuit board or assembled components, more may impose lateral thrust to shell fragment 6 accidentally and cause the side direction deformation of elastic arm 62 or connecting section 63, destroy the effective electrically connect between assembly and circuit board, thereby can't reach predetermined anti-electromagnetic radiation or ground connection effect.

On the other hand, when excessively the application of force presses down connecting section 63, elastic arm 62 stressed surpass the range of linearity of Hooke's law after, not only produce non-response plastic deformation, and big more with deformation, produce the required stress of deformation and reduce gradually, vicious circle will cause shell fragment 6 to be damaged fully.

The utility application that application number is 200420036328.0, name is called " a kind of grounding elastic part " has disclosed a kind of " improvement of grounding elastic part " as shown in Figure 2, and this shell fragment 7 includes a top 70, for the absorption of the suction nozzle in the production process; Two cover wall 71, are connected in this top 70 two non-conterminous sides, all bend in the top 70 with one side; Edge two is covered under the wall 71 respectively relatively toward interior extension by this in one bottom 72; And an elastic portion 73, be a wherein side of two non-conterminous sides in addition that is connected this top 70, and see it that this elastic portion 73 protrudes in this and covers height of wall 71 by the side-looking direction.So, not only have the shielding foreign object and collude the effect of drawing, more can stop shell fragment 7 to be subjected to external force pressure and have the excessive situation of deflection to take place.

Yet, existing electronic product is there's no one who doesn't or isn't compact with moulding to be demand, various assemblies are microminiaturization day by day thereupon, and the elastic portion 73 of this shell fragment 7 is to extend from one of this top 70 side, overlook sight, structure must take by top 70 add elastic portion 73 area and, and top 70 is in the surface mounting technology, for suction nozzle indispensable structure when moving, make further microminiaturization of its volume with negative-pressure adsorption.

The utility model content

Therefore, the purpose of the utility model is promptly providing a kind of area occupied less, and effectively microminiaturized sidewall is extended with the high shell fragment of ending of elastic arm.

Another purpose of the utility model is to provide a kind of elastic arm to have many places bendings, can be for progressively absorbing deformation respectively and the sidewall of unlikely damage easily is extended with the high shell fragment of ending of elastic arm.

So the sidewall of the utility model is extended with the high shell fragment of ending of elastic arm and comprises: two for the weld part that is welded on the circuit board; Two sidewalls, having one respectively extends from base that respectively should correspondence weld part one side, and in contrast to one of this base top margin, and respectively this sidewall and this weld part system folder one angle respectively, and one of these sidewalls are to be formed with a depression breach along the online direction of this top margin and base; Two are connected these sidewalls and linking part spaced apart respectively, make this two sidewall, this two weld part, and this two linking parts one common peripheral lay out an inner space; One extends to this inner space by this this concave edges bending that forms the sidewall of this breach, and bending is towards extend to the outstanding respectively elastic arm of this sidewall top margin away from this weld part direction; Reach a butt shielding portion that extends from outstanding these sidewall top margin ora terminalis of this elastic arm, and have the free end that a reverse bending extends to this inner space.

Be connected support by above-mentioned sidewall and linking part common, can prevent that shell fragment integral body is subjected to the external force side pressure and presses down the deformation that is caused.And when this elastic arm and the butt shielding portion is stressed when pressing down, can be at the block that suitably highly is subjected to sidewall and linking part, elastic arm can not suffer to produce out of excessively pressing down of expecting the deformation that can not reply easily.Can form a smooth adsorption section on this butt shielding portion again, can be directly move, need not be additionally establish a flat surfaces in addition and take up space, more can effectively reduce the area of shell fragment at end face for suction nozzle absorption.Moreover, after elastic arm extends to the inner space, forming the bending angle significantly of plural number, sectional deformation progressively absorbs downforce, unlikelyly damages and produce bigger elastic force scope easily, to reach the purpose of the utility model really.

Description of drawings

About addressing other technology contents, characteristics and effect before the utility model, below cooperate detailed description with reference to graphic and embodiment, can know to present.

Fig. 1 is a kind of schematic appearance of known shell fragment;

Fig. 2 is the schematic diagram of another kind of known grounding elastic part;

Fig. 3 is the schematic perspective view of the utility model first preferred embodiment;

Fig. 4 is the schematic side view that Fig. 3 embodiment is subjected to pressed status;

Fig. 5 is after the utility model second preferred embodiment is installed on circuit board, not the schematic side view of stress;

Fig. 6 is the schematic perspective view of Fig. 5 embodiment; And

Fig. 7 is the schematic perspective view of the utility model the 3rd preferred embodiment.

Embodiment

Consult Fig. 3, the utility model first preferred embodiment end high shell fragment 1, be for being welded on the predetermined connection pad (pad) of a circuit board with two weld parts 11; Two sidewalls 12,12 ' then extend by weld part 12 bendings with a base 121 respectively and on, be top margin 122 in this definition in contrast to these 121 places, base, and in this example, sidewall 12 is formed with one by top margin 122 recessed depression breach 120 to base 121; And be extended with two linking parts 15 that are parallel to top margin 122 respectively by the both sides of top margin 122, in order to the top margin 122 of cross-over connection to relative sidewall 12 ', and with sidewall 12,12 ' and weld part 11 one common peripheral lay out an inner space 16.

123 places, depression breach 120 edges by sidewall 12, an elastic arm 13 is extended in 16 bendings to the inner space, and behind a preset distance, bending is towards extending away from weld part 11 directions again, pass up to the open area that runs through that is constituted at interval by two linking parts 15, and protrude on each sidewall top margin 122; And in this example, elastic arm 13 bends out a butt shielding portion 14 immediately behind an outstanding predetermined altitude.

Butt shielding portion 14 comprises these weld parts 11 of almost parallel and is parallel to these weld parts 11 and forms the adsorption section 141 of a flat surfaces, and by the reverse again section of blocking 142 that extends to this inner space 16 that bends of adsorption section 141, make the section of blocking 142 free end by sidewall 12,12 ' and linking part 15 cover, and simultaneously elastic arm 13 to the two ends of butt shielding portion 14 all are hidden in inner space 16, any open end of unlikely generation and cause that foreign object colludes and draw.

During application, can use a suction nozzle to attract this adsorption section 141 and the mobile precalculated position of high shell fragment 1 of ending to circuit board, send into the welding of reflow machine again, because the deformation position of elastic arm 13 is far above weld part 11, even scolding tin is excessive, also can not climb depression breach 120 edges 123 of tin, and cut down the elasticity of elastic arm 13 to sidewall 12; So can guarantee the elastic force effect of elastic arm 13 bent stress and deformations, and the effect of butt shielding portion 14 Elastic Contact is provided.Again when this butt shielding portion 14 is excessively pressed down by assembly, elastic arm 13 will produce the position of deformation to retraction shown in Figure 4 inner space 16, assembly is then by two sidewalls 12,12 ' and be positioned at 15 blocks of linking part of end face, bear by the overall structure of ending high shell fragment 1 and to press down, thereby avoid elastic arm 13 to be subjected to excessive downforce and produce the deformation that to reply, guarantee the elasticity of shell fragment.

Consult Fig. 5,6, the utility model second preferred embodiment end high shell fragment 2, include two weld parts 21 equally, two sidewalls 22,22 ', one elastic arm 23, one butt shielding portion 24 and two linking parts 25, and it is identical with first preferred embodiment, to not give unnecessary details in addition at this, and main difference is to form recessed breach 220 to top margin 222 by base 221 at sidewall 22, elastic arm 23 also extends to inner space 26 by these breach concave edges 223 bendings, and behind outstanding these sidewall top margin 222 ora terminalis, extend butt shielding portion 24, because the starting point of elastic arm 23 is equally away from weld part 21, also can avoid climbing tin and the problem of deterioration, and because of elastic arm is to be formed on the necessary sidewall, shell fragment need not stay the roof for absorption or extension elastic arm at the top, effectively reduce the shared board area of shell fragment, thus microminiaturized smoothly.

Certainly, know the personage of this skill, also different aspects can be arranged when understanding the aforementioned connecting portion that ends high shell fragment easily, shown in Fig. 7 this case the 3rd embodiment, wherein this two sidewall 32,32 ', weld part, elastic arm 33, etc. structure all be as good as with first embodiment, but 35 of its linking parts are the dual side-edge 324 places extension that is linked these top margins 122 and base 121 by sidewall 32,32 ', for linking this two sidewall 32,32 ' by the side, more can strengthen the structural strength that this ends high shell fragment 3, and prevent the deformation that external force causes.

In sum, the utility model end high shell fragment, because of the characteristics on the shaped design,, and can possess the characteristic of original design compared to known elastic piece structure microminiaturization further, then more good in the utilization of practicality and industry.

The above person of thought, it only is the preferred embodiment of the utility model, when the scope that can not limit the utility model enforcement with this, promptly the simple equivalent of doing according to the utility model claim and description generally changes and modifies, and all should still belong in the scope that the utility model patent contains.

Claims

1. a sidewall is extended with the high shell fragment of ending of elastic arm, is to supply to be welded on the circuit board, comprises:

Two for the weld part that is welded on this circuit board;

Two sidewalls, having one respectively extends from base that respectively should correspondence weld part one side, and in contrast to one of this base top margin, and respectively this sidewall and this weld part system folder one angle respectively, and one of these sidewalls are to be formed with a depression breach along the online direction of this top margin and base;

Two are connected these sidewalls and linking part spaced apart respectively, make this two sidewall, this two weld part, and this two linking parts one common peripheral lay out an inner space;

One extends to this inner space by this this concave edges bending that forms the sidewall of this breach, and bending is towards extend to the outstanding respectively elastic arm of this sidewall top margin away from this weld part direction; And

One extends the butt shielding portion from outstanding these sidewall top margin ora terminalis of this elastic arm, and has the free end that a reverse bending extends to this inner space.

2. be extended with the high shell fragment of ending of elastic arm according to the described sidewall of claim 1, it is characterized in that, this butt shielding portion comprises that one protrudes in these sidewall top margin ora terminalis and is parallel to the adsorption section of these weld parts, and a flat surfaces is provided by this.

3. be extended with the high shell fragment of ending of elastic arm according to the described sidewall of claim 1, it is characterized in that, two opposite ends of this two linking part are extended the top margin from this two sidewall respectively.

4. be extended with the high shell fragment of ending of elastic arm according to the described sidewall of claim 1, it is characterized in that, this two sidewall has more the side that links these top margins and base, and two opposite ends of this two linking part are extended the side from this two sidewall respectively.

5. be extended with the high shell fragment of ending of elastic arm according to the described sidewall of claim 1, it is characterized in that, this breach system is recessed to this base by this sidewall top margin, and the concave edges that forms this breach from this sidewall is extended by this elastic arm system.

6. be extended with the high shell fragment of ending of elastic arm according to the described sidewall of claim 1, it is characterized in that, this breach system is recessed to this top margin by this sidewall base, and the concave edges that forms this breach from this sidewall is extended by this elastic arm system.