CN108668439A - A kind of spring slice fixing structure and installation method - Google Patents
A kind of spring slice fixing structure and installation method Download PDFInfo
- Publication number
- CN108668439A CN108668439A CN201810653803.5A CN201810653803A CN108668439A CN 108668439 A CN108668439 A CN 108668439A CN 201810653803 A CN201810653803 A CN 201810653803A CN 108668439 A CN108668439 A CN 108668439A
- Authority
- CN
- China
- Prior art keywords
- positioning column
- hole
- fixing structure
- shrapnel
- spring slice
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/182—Printed circuits structurally associated with non-printed electric components associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
- H05K1/184—Components including terminals inserted in holes through the printed circuit board and connected to printed contacts on the walls of the holes or at the edges thereof or protruding over or into the holes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/11—Printed elements for providing electric connections to or between printed circuits
- H05K1/111—Pads for surface mounting, e.g. lay-out
- H05K1/112—Pads for surface mounting, e.g. lay-out directly combined with via connections
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
The invention discloses a kind of spring slice fixing structures, the fixed structure and traditional fixed structure difference lies in, at least provided with two first through hole on shrapnel, it is provided with positioning column in the first through hole, and the positioning column is worn downwards pad and is extended in printed circuit board, the upper end of the positioning column is provided with a tablet.The second through-hole for accommodating the positioning column being set on the printed circuit board is poroid in the small taper of the big lower end diameter of upper end diameter.Also disclose the installation method of the fixed structure.The fixed structure not only effective solution shrapnel weld strength weak problem, reduce the fraction defective of shrapnel missing, reduce maintenance cost, human cost and the scrappage for assembling printed circuit board, material cost is saved, and it is easy to operate, it only needs to increase a step relative to traditional fixed structure, processing efficiency will not be reduced.
Description
Technical field
The present invention relates to technical field of electronic products, the fixed structure of the shrapnel in specifically a kind of electronic product with
And the installation method of the fixed structure.
Background technology
Very more electronic products all uses this parts of shrapnel at present, during assembling, need shrapnel this
Parts connect upper and lower component, make it possible to play the role of good conducting.
However, the shrapnel on a lot of products is very easy to just lack now, this missing is not that machine sets lacking for part
It loses, but after the completion of machine sets part, by artificial or certain neglectful operation by shrapnel to touching off, cause lacking for shrapnel
It loses.And may result in when serious and fall off for welding shrapnel pad (PAD), cause assembly printed circuit board (PCBA)
It scraps, the suitable height of cost allowance.As the adverse events that this shrapnel is touched down are very more, even if requiring manual work small again
The heart can not avoid also or completely.
It is exactly that shrapnel itself is smaller to cause the true cause of this problem, so as to welding area with regard to smaller,
The weld strength of shrapnel is weaker.
According to statistics, think that the fraction defective of this shrapnel missing is up to 7%, and this 7% the inside causes to assemble due to Pad off
Printed circuit board scrap up to 3%, loss is bigger.
Invention content
In view of the above-mentioned problems, the present invention provides a kind of spring slice fixing structure and the installation method of the fixed structure, it should
Fixed structure is not only easy for installation, but also effectively raises the fixing intensity of shrapnel, reduces the fraction defective of shrapnel missing.
The technical scheme adopted by the invention to solve the technical problem is that：
A kind of spring slice fixing structure is provided at least provided with two first through hole on shrapnel in the first through hole
Positioning column, and the positioning column is worn downwards pad and extended in printed circuit board, it is flat that the upper end of the positioning column is provided with one
Plate；
The second through-hole for accommodating the positioning column being set on the printed circuit board is in the big lower end of upper end diameter
The small taper of diameter is poroid.
Further, opened up on the cylindrical surface of the positioning column it is fluted go, and tin cream is filled in the groove.
Further, the groove is axially disposed, and multiple grooves are along the circumferential direction uniformly distributed.
Further, the groove is in the shape of a spiral.
Further, the edge of the tablet is provided with to the inclined elastic pressuring plate of inner underside, and multiple bullets
Property tabletting it is along the circumferential direction uniformly distributed.
Further, the diameter for the third through-hole for accommodating the positioning column being set on the pad is more than described
The diameter of positioning column.
Further, the diameter of the first through hole is equal to the diameter of the positioning column.
Further, the taper of second through-hole is 3 ° -5 °.
A kind of installation method of spring slice fixing structure, includes the following steps,
First, tin cream is smeared on pad, then shrapnel is placed on to the top of tin cream；
Second, tin cream is smeared in the groove of positioning column, makes the full groove of tin cream filling；
Positioning column is inserted into printed circuit board by third, until the elastic pressuring plate on positioning column is in compressed shape
State；
4th, it is placed into reflow oven and carries out heating welding.
The beneficial effects of the invention are as follows：
1, fixed structure effective solution shrapnel weld strength weak problem reduces the fraction defective of shrapnel missing,
Maintenance cost, human cost and the scrappage for assembling printed circuit board are reduced, material cost has been saved.
2, it since the size of positioning column is smaller, is easy to happen and falls off during being transported to reflow oven, by that will print
First through hole on circuit board is designed to the small bellmouth of the big lower end diameter of upper end diameter, to make positioning column and the when mounted
Expanding force is generated between one through-hole, avoids falling off during carrying mobile.
3, by opening up groove on positioning column, and tin cream is filled in groove, to increase between positioning column and pad
Weld strength, and then improve shrapnel weld strength.
4, by the way that tablet is arranged on the top of positioning column, elastic pressuring plate is set in the edge of tablet, and make on pad
The diameter of second through-hole is more than the diameter of the positioning column, in this way, on the one hand heated in reflow oven, after tin cream melts, meeting
Under the pressure of elastic pressuring plate, the tin cream after a part is melted is pressed into positioning column and the second through-hole and positioning column and the
Between one through-hole, increase the fastness of welding.On the other hand, since the tin cream after thawing has mobility, it is possible that
There is no tin creams for the part welding surface of shrapnel, the downside of shrapnel can be made to touch tin cream always by the way that elastic pressuring plate is arranged,
It avoids " hollowing ".
Description of the drawings
Fig. 1 is the structural schematic diagram of this fixed structure；
Fig. 2 is the enlarged structure schematic diagram of part A in Fig. 1；
Fig. 3 is the vertical view of this fixed structure；
Fig. 4 is the dimensional structure diagram of positioning column；
Fig. 5 is the enlarged structure schematic diagram of part B in Fig. 4；
Fig. 6 is the dimensional structure diagram of positioning column in embodiment two；
Fig. 7 is the enlarged structure schematic diagram of C portion in Fig. 6.
In figure：1- printed circuit boards, the second through-holes of 11-, 2- pads, 21- third through-holes, 3- tin creams, 4- shrapnels, 5- positioning
Column, 51- tablets, 511- elastic pressuring plates, 52- grooves.
Specific implementation mode
Embodiment one
As shown in Figure 1, a kind of 4 fixed structure of shrapnel includes the first through hole being set on shrapnel 4, the first through hole
It is inside provided with positioning column 5, and the positioning column 5 is worn downwards pad 2 and extended in printed circuit board 1.The printed circuit
The second through-hole 11 for accommodating the positioning column 5 is provided on plate 1, it is described fixed for accommodating to be provided on the pad 2
The third through-hole 21 of position column 5.The upper end of the positioning column 5 is provided with a rounded tablet 51.
Due to during being welded to shrapnel 4, needing to place the assembly printed circuit board 1 for being equipped with shrapnel 4
Into reflow oven, and the fan in reflow oven can make the circulation in reflow oven there are air-flow.And at this time between shrapnel 4 and pad 2
Tin cream 3 melt firm welding not yet, therefore under the action of air-flow, shrapnel 4 is possible to rotate around locating shaft.
In order to avoid the generation of this phenomenon, as shown in figure 3, at least provided with two positioning columns 5 on the shrapnel 4.
As a kind of specific implementation mode, there are three positioning columns 5 for setting on the shrapnel 4 described in the present embodiment, and determine described in three
Position 5 arrangement triangular in shape of column.
When welding shrapnel 4, need that first positioning column 5 is inserted into printed circuit board 1, it then again will printing electricity
Road plate 1, which is transported in reflow oven, carries out heating welding.Due to the small volume of shrapnel 4, the volume of corresponding positioning column 5 also compared with
It is small, it is easy to fall off due to shaking during carrying.
For this purpose, as depicted in figs. 1 and 2, second through-hole 11 is in the small bellmouth of the big lower end diameter of upper end diameter.This
Sample will produce expanding force between positioning column 5 and printed circuit board 1, avoid when positioning column 5 to be inserted into printed circuit board 1
Positioning column 5 is fallen off during carrying.Why the second through-hole 11 is designed to bellmouth herein, is because opposite
It is thicker in the thickness of 2 printed circuit board 1 of pad, it is easy to process.
Preferably, the taper ɑ of second through-hole 11 is 3 ° -5 °.
In order to increase the weld strength between positioning column 5 and pad 2, as shown in Figure 4 and Figure 5, the cylinder of the positioning column 5
The groove 52 axially extended is offered on face, multiple grooves 52 are along the circumferential direction uniformly distributed, and in the groove 52
Filled with tin cream 3.As a kind of specific implementation mode, the quantity of groove 52 described in the present embodiment is four.
, in this way can be thinning relative to 3 thickness of tin cream before heating since the tin cream 3 melted after heating has mobility, if
It is relatively difficult, the shadow especially in reflow gas stream in the stove only so that shrapnel 4 is adjacent to the upper surface of tin cream 3 by the gravity of shrapnel 4
It is more difficult under sound, it is susceptible to " hollowing ".
For this purpose, as shown in Figure 1 and Figure 4, the edge of the tablet 51 is provided with to the inclined elastic pressuring plate of inner underside
511, and multiple elastic pressuring plates 511 are along the circumferential direction uniformly distributed.As a kind of specific implementation mode, described in the present embodiment
The quantity of elastic pressuring plate 511 is three.
In this way when installing positioning column 5, elastic pressuring plate 511 is set to be in compressed state by lower pressure, in reflow oven
Interior tin cream 3 is by after heating and melting, and under the recovery force effect of elastic pressuring plate 511, bullet screen can move downward, and ensures under shrapnel 4
Side is adjacent to tin cream 3 always, avoids the generation of " hollowing ", ensures the intensity of welding.
As shown in Fig. 2, the diameter N of the third through-hole 21 is more than the diameter of the positioning column 5, preferred described second is logical
The diameter for being relatively large in diameter one end in hole 11 is equal to the diameter N of the third through-hole 21.
In this way, as shown in Fig. 2, in reflow oven, the tin cream 3 after thawing can flow under the active force of elastic pressuring plate 511
Between positioning column 5 and third through-hole 21 and between positioning column 5 and the second through-hole 11, increase the intensity of welding.
In order to avoid under the active force of elastic pressuring plate 511, the tin cream 3 after a part is melted is overflowed out of first through hole,
The diameter M of the first through hole is equal to the diameter of the positioning column 5.
Embodiment two
As shown in Figure 6 and Figure 7, in the shape of a spiral, remaining structure is the same as embodiment one for the groove 52.
A kind of installation method of 4 fixed structure of shrapnel, includes the following steps：
First, tin cream 3 is smeared on pad 2, then shrapnel 4 is placed on to the top of tin cream 3.
Second, tin cream 3 is smeared in the groove 52 of positioning column 5, makes the full groove 52 of the filling of tin cream 3.
Third, sequentially passes through shrapnel 4, pad 2 is inserted into printed circuit board 1 by positioning column 5, until on positioning column 5
Elastic pressuring plate 511 is in compressed state.
4th, the printed circuit board 1 for being equipped with shrapnel 4 is placed into reflow oven, heating welding is carried out.
Heating welding is carried out here by reflow oven and belongs to the prior art, heats the temperature setting and other techniques of welding
Parameter and step also belong to the prior art, and details are not described herein.
Claims (9)
1. a kind of spring slice fixing structure, it is characterised in that：At least provided with two first through hole, the first through hole on shrapnel
It is inside provided with positioning column, and the positioning column is worn downwards pad and extended in printed circuit board, the upper end of the positioning column is set
It is equipped with a tablet；
The second through-hole for accommodating the positioning column being set on the printed circuit board is in the big lower end diameter of upper end diameter
Small taper is poroid.
2. a kind of spring slice fixing structure according to claim 1, it is characterised in that：It is opened up on the cylindrical surface of the positioning column
Tin cream is filled in fluted to go and described groove.
3. a kind of spring slice fixing structure according to claim 2, it is characterised in that：The groove is axially disposed, and
Multiple grooves are along the circumferential direction uniformly distributed.
4. a kind of spring slice fixing structure according to claim 2, it is characterised in that：The groove is in the shape of a spiral.
5. a kind of spring slice fixing structure according to claim 1, it is characterised in that：The edge of the tablet be provided with to
The inclined elastic pressuring plate of inner underside, and multiple elastic pressuring plates are along the circumferential direction uniformly distributed.
6. a kind of spring slice fixing structure according to claim 5, it is characterised in that：It is set on the pad and is used to hold
Receive the positioning column third through-hole diameter be more than the positioning column diameter.
7. a kind of spring slice fixing structure according to claim 5, it is characterised in that：The diameter of the first through hole is equal to institute
State the diameter of positioning column.
8. a kind of spring slice fixing structure according to claim 1, it is characterised in that：The taper of second through-hole be 3 °-
5°。
9. a kind of installation method of spring slice fixing structure, it is characterised in that：Include the following steps,
First, tin cream is smeared on pad, then shrapnel is placed on to the top of tin cream；
Second, tin cream is smeared in the groove of positioning column, makes the full groove of tin cream filling；
Positioning column is inserted into printed circuit board by third, until the elastic pressuring plate on positioning column is in compressed state；
4th, it is placed into reflow oven and carries out heating welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810653803.5A CN108668439B (en) | 2018-06-22 | 2018-06-22 | Spring plate fixing structure and mounting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810653803.5A CN108668439B (en) | 2018-06-22 | 2018-06-22 | Spring plate fixing structure and mounting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108668439A true CN108668439A (en) | 2018-10-16 |
| CN108668439B CN108668439B (en) | 2023-08-08 |
Family
ID=63772987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810653803.5A Active CN108668439B (en) | 2018-06-22 | 2018-06-22 | Spring plate fixing structure and mounting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108668439B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0303485A2 (en) * | 1987-08-12 | 1989-02-15 | BICC Public Limited Company | An improved circuit board |
| CN103199389A (en) * | 2013-03-28 | 2013-07-10 | 华为机器有限公司 | Elastic piece connecting structure |
| CN103398071A (en) * | 2013-07-29 | 2013-11-20 | 无锡市张泾宇钢机械厂 | Elastic piece type clamp nut |
| CN205985420U (en) * | 2016-08-25 | 2017-02-22 | 安费诺东亚电子科技(深圳)有限公司 | Novel connector stationary blade |
| CN107750089A (en) * | 2017-12-08 | 2018-03-02 | 无锡隆盛科技股份有限公司 | A kind of air throttle grounding structure of circuit board |
| CN208317120U (en) * | 2018-06-22 | 2019-01-01 | 郑州云海信息技术有限公司 | A kind of spring slice fixing structure |
-
2018
- 2018-06-22 CN CN201810653803.5A patent/CN108668439B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0303485A2 (en) * | 1987-08-12 | 1989-02-15 | BICC Public Limited Company | An improved circuit board |
| CN103199389A (en) * | 2013-03-28 | 2013-07-10 | 华为机器有限公司 | Elastic piece connecting structure |
| CN103398071A (en) * | 2013-07-29 | 2013-11-20 | 无锡市张泾宇钢机械厂 | Elastic piece type clamp nut |
| CN205985420U (en) * | 2016-08-25 | 2017-02-22 | 安费诺东亚电子科技(深圳)有限公司 | Novel connector stationary blade |
| CN107750089A (en) * | 2017-12-08 | 2018-03-02 | 无锡隆盛科技股份有限公司 | A kind of air throttle grounding structure of circuit board |
| CN208317120U (en) * | 2018-06-22 | 2019-01-01 | 郑州云海信息技术有限公司 | A kind of spring slice fixing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108668439B (en) | 2023-08-08 |
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