CN2802762Y

CN2802762Y - Elastic piece of preventing elastic fatigue

Info

Publication number: CN2802762Y
Application number: CNU2005200157678U
Authority: CN
Inventors: 徐子淮
Original assignee: HEPU BUSINESS DESIGN CO Ltd
Current assignee: HEPU BUSINESS DESIGN CO Ltd
Priority date: 2005-04-26
Filing date: 2005-04-26
Publication date: 2006-08-02
Anticipated expiration: 2015-04-26

Abstract

The utility model discloses an elastic sheet of preventing elastic fatigue, which comprises a fixing part, spring parts and a butting part, wherein the two spring parts are respectively extended from both ends of the fixing part; the spring parts are alternately arranged fore and back and are extended and connected with both ends of the butting part so as to form an integral structure of the elastic sheet. Hence, the arrangement of the spring parts causes the elastic not to generate the deformation of deflection and shift after stressed; hence, the contact effect and the structural strength of the elastic sheet can be effectively enhanced.

Description

The shell fragment that elastoresistance is tired

Technical field

The utility model relates to the tired shell fragment of a kind of elastoresistance, and particularly a kind of being located between a printed circuit board (PCB) and a hardware can effectively be improved the tired shell fragment of elastoresistance of the contact effect and the structural strength of this shell fragment.

Background technology

The shell fragment that general electronics industry is used always is to be bent into the metal material punching press, again with surface mount technology (Surface Mount Technology, be called for short: SMT) mode is welded on the circuit board, the shape of utilizing the material behavior of shell fragment itself and being constituted produces certain elastic force, can be used as other element and circuit board electrically connects, ground connection, screening effect, dwindle the loop, reduce impedance, make the energy reduction and radiated emission is reduced, reach the inhibition electromagnetic interference, static discharge and meet Electro Magnetic Compatibility, even the cushioning effect when also can be used as contact.

See also shown in Figure 1, it is the structure of general existing shell fragment 1, this shell fragment 1 comprises a fixed part 11, an elastic pressing part 12, reaches an abutting part 13, wherein be inclined upwardly and be extended with an elastic pressing part 12 from an end of this fixed part 11, the other end then is reverse inclination with elastic pressing part 12 and extends, and is formed with first gap 14 with elastic pressing part 12; Top horizontal-extending from this elastic pressing part 12 has an abutting part 13 in addition, in the continuous downward-sloping extension of the other end of this abutting part 13, to be formed with second gap 15 with elastic pressing part 12; These fixed part 11 welding are bonded on the printed circuit board (PCB) (not shown), can contact with other hardware (not shown) to make abutting part 13, and this printed circuit board (PCB) and this hardware are electrically connected.

Because this shell fragment 1 has first gap 14 and second gap 15, when this shell fragment 1 is subjected to suppressing, with the distortion that produces the deflection displacement that contacts that makes this abutting part 13 with this hardware, uncertain so that the spacing distance of this shell fragment 1 produces, and significantly reduce the conductivity of this shell fragment 1 and preventing of electromagnetic radiation; In addition the stress of this shell fragment 1 is a monolateral supporting construction, causes the elastic force of this elastic pressing part 12 poor, badly influences the adaptation that contacts of abutting part 13 and hardware indirectly, reaches preventing of conductivity and electromagnetic radiation.

Moreover, disclosed a kind of " seal type shell fragment " in the novel patent announcement of the TaiWan, China M250512 patent document, the shell fragment of this patent comprises canned paragraph, stretch section, contact-segment, and closed section, wherein this canned paragraph is in order to be solidly connected to circuit board, this stretch section upwards bends from aforementioned fixation Duan Yiduan and extends to form, it comprises first kink that is positioned at the end that links to each other with canned paragraph, and be positioned at second kink of the other end, this contact-segment extends to form along the direction that is parallel to canned paragraph from second kink of aforementioned stretch section, this contact-segment has first ora terminalis that links to each other with this second kink, and be positioned at second ora terminalis of relative opposite side, be bent downwardly and extend to form and closed section is second ora terminalis from aforementioned contact-segment, it comprises the bend that links to each other with this second ora terminalis, and forms staggered between this closed section and this stretch section on the locus; Like this,, do not produce the distortion of deflection displacement after making this shell fragment stressed, can effectively improve the structural strength of this shell fragment by on the locus, forming staggered setting between this closed section and this stretch section.

But, the canned paragraph of this patent is a tabular, cause when being welded in circuit board on scolding tin this canned paragraph, the easy overflow of scolding tin is to the bent angle that coats between this canned paragraph and this stretch section, cause this stretch section part to be fixed and hardening, thereby lose part elasticity, and therefore canned paragraph is come off easily on circuit board by scolding tin, and reduce useful life, very inconvenience.

The utility model content

In view of the shortcoming of aforementioned existing shell fragment, the utility model proposes a kind of brand-new tired shell fragment of elastoresistance, with the defective that prior art was produced of forgoing.

The shell fragment that provides a kind of elastoresistance tired is provided a purpose of the present utility model, with the contact effect and the structural strength of effective this shell fragment of raising.

According to above-mentioned purpose, this shell fragment includes a fixed part, two elastic pressing parts and a pressure section, wherein, this fixed part is connected on the printed circuit board (PCB), and extend two elastic pressing parts respectively from two ends, respectively this elastic pressing part is that forward and backward interval is provided with, and it is connected to the two ends of this pressure section, to form the overall structure of a shell fragment; By the setting at this forward and backward interval of elastic pressing part, do not produce the distortion of deflection displacement after making this shell fragment stressed, can effectively improve the contact effect and the structural strength of this shell fragment.

The shell fragment that provides a kind of elastoresistance tired is provided another purpose of the present utility model, to avoid the scolding tin overflow to the bent angle between this fixed part and this elastic pressing part.

According to above-mentioned purpose, the dual-side of this fixed part is respectively equipped with a stiff end and a link, be bent with a bent angle between this stiff end and the link, make the link position lower, each link has a junction to the direction vertical extent of the stiff end of correspondence, make this connecting portion be connected in the below of each stiff end, when being welded in this fixed part on the printed circuit board (PCB), scolding tin can be covered with between this fixed part and the printed circuit board (PCB), can overflow to the bent angle between this fixed part and this elastic pressing part, avoid this elastic pressing part part to be fixed and hardening, therefore lose the elasticity of part by scolding tin.

A purpose more of the present utility model is that this fixed part is provided with hole, when this fixed part is connected on the printed circuit board (PCB), can provide bonding material to be easy to coat set, and then reaches better for effect.

Description of drawings

Fig. 1 is the plane graph of existing shell fragment.

Fig. 2 is the stereogram according to shell fragment of the present utility model.

Fig. 3 is the front view according to the utility model shell fragment.

Fig. 4 is the user mode schematic diagram according to the utility model shell fragment.

Embodiment

For understanding being arranged further and understand, now be described in detail as follows with the form of embodiment in conjunction with the accompanying drawings the purpose of this utility model, shape, constructing apparatus feature and effect thereof:

The utility model relates to a kind of " shell fragment that elastoresistance is tired ", see also Fig. 2, shown in 3, this shell fragment 2 is one-body molded made with conductivity good metal material, this metal material can be phosphor bronze, stainless steel, or the material of beryllium copper, it includes a fixed part 21, two elastic pressing parts 22, an and pressure section 23, wherein, this fixed part 21 is provided with hole 211, when making this fixed part 21 be connected on the printed circuit board (PCB) 41 (as shown in Figure 4), can be by the setting of this hole 211, make bonding material (as: scolding tin, heat-conducting glue) is easy to coat set, and then reaches better in conjunction with effect; In addition, extend two elastic pressing parts 22 respectively at these fixed part 21 two ends, respectively this elastic pressing part 22 is that forward and backward interval is provided with, and it is connected to the two ends of this pressure section 23, to form the overall structure of this shell fragment 2.

By the composition of above-mentioned member, see also shown in Figure 4ly, the setting at these elastic pressing part 22 forward and backward intervals does not produce the distortion of deflection displacement after making this shell fragment 2 stressed, can effectively improve the contact effect and the structural strength of this shell fragment 2.

See also again shown in Fig. 2,3, this elastic pressing part 22 is provided with forward and backward interval, and respectively this elastic pressing part 22 has bending district 221 and the district of bending once 222 on one respectively, wherein, this time bending district 222 is positioned at the junction of elastic pressing part 22 and fixed part 21, and it is bending upwards, distinguishes 222 with this time bending and joins and should go up bending district 221, it is positioned at the junction of elastic pressing part 22 and pressure section 23, and it is and the bending district 222 rightabout bendings that make progress down; By this elastic pressing part 22, and the setting at forward and backward interval, make this shell fragment 2 have preferable compression ratio, to be applicable to the assembly gap (as shown in Figure 4) of printed circuit board (PCB) 41 and various hardware 42.

See also shown in Figure 4 again, when this shell fragment 2 is located between printed circuit board (PCB) 41 and the hardware 42, can use the mode of surface mount technology (SMT) or welding, so that the fixed part 21 of this shell fragment 2 is attached on the printed circuit board (PCB) 41, and the design of the hole 211 by this fixed part 21, can make bonding material (as: scolding tin, heat-conducting glue) with fixed part 21 firm being positioned on the printed circuit board (PCB) 41; Like this,, can make the driving fit more that contacts of pressure section 23 and hardware 42, and not produce the distortion of deflection displacement, increasing its conductivity, and reach the purpose that reduces electromagnetic radiation by the elastic force of this elastic pressing part 22.

See also Fig. 2 again, shown in 3, the dual-side 212 of this fixed part 21,212 ' be respectively equipped with a stiff end 213,213 ' and a link 214,214 ', wherein, stiff end 213,213 ' with link 214,214 ' be bent with a bent angle 215,215 ', make link 214,214 ' the position lower, each link 214,214 ' to the stiff end 213 of correspondence, 213 ' the direction vertical extent a junction 216 is arranged, 216 ', make this connecting portion 216,216 ' be connected in each stiff end 213,213 ' the below, and form this fixed part 21 by forming by above-mentioned member, when being welded in this fixed part 21 on the printed circuit board (PCB) 41, scolding tin can be covered with between this fixed part 21 and the printed circuit board (PCB) 41, can overflow to the bent angle 215 of 22 of this fixed part 21 and this elastic pressing parts, 215 ' on, avoid these elastic pressing part 22 parts to be fixed and hardening, therefore lose the elasticity of part by scolding tin.

In sum, the shell fragment tired according to elastoresistance of the present utility model has following plurality of advantages at least: between the elastic pressing part of the present utility model every setting, so that this shell fragment does not produce the distortion of deflection displacement after stressed, thereby can improve the contact effect and the structural strength of this shell fragment effectively; In addition, this elastic pressing part is provided with two bending districts, has preferable compression ratio, to be applicable to the assembly gap of various hardware and printed circuit board (PCB); In addition, this fixed part is provided with hole, so that fixed part can be easy to coat set for bonding material, and then reaches better for effect.

The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and 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 shell fragment (2) that elastoresistance is tired is welded on the printed circuit board (PCB) (41), contacts for a hardware (42); It is characterized in that it includes fixed part (21), elastic pressing part (22), and pressure section (23), two described elastic pressing parts (22) are extended at the two ends of wherein said fixed part (21) respectively, each described elastic pressing part (22) has respectively to bend district (221) on one and once bend distinguishes (222), described bending district (222) down is positioned at the junction of described elastic pressing part (22) and fixed part (21), it is upwards bending, and described going up bends the junction that district (221) is positioned at described elastic pressing part (22) and pressure section (23), it is the rightabout upwards bending with described bending district (222) down, before described elastic pressing part (22) is, the back is provided with at interval, and it is connected to the two ends of described pressure section (23), to form the structure of a shell fragment (2).

2. the shell fragment (2) that elastoresistance according to claim 1 is tired is characterized in that described shell fragment (2) is one-body molded made with conductivity good metal material.

3. the shell fragment (2) that elastoresistance according to claim 2 is tired is characterized in that described metal material can be phosphor bronze, stainless steel or beryllium copper.

4. the shell fragment (2) that elastoresistance according to claim 1 is tired is characterized in that described fixed part (21) is provided with hole (211), so that described fixed part (21) can be easy to coat set for bonding material.

5. the shell fragment (2) that elastoresistance according to claim 1 is tired, the dual-side (212 that it is characterized in that described fixed part (21), 212 ') be respectively equipped with a stiff end (213,213 ') and a link (214,214 '), described stiff end (213,213 ') and link (214,214 ') between be bent with a bent angle (215,215 '), make described link (214,214 ') the position lower, each link (214,214 ') to the stiff end (213 of correspondence, 213 ') the direction vertical extent a junction (216 is arranged, 216 '), make the described connecting portion (216 of Denging, 216 ') be connected in each stiff end (213,213 ') the below.