CN209964410U - Tin bead prevention structure of steel mesh for SMT (surface mount technology) mounting - Google Patents
Tin bead prevention structure of steel mesh for SMT (surface mount technology) mounting Download PDFInfo
- Publication number
- CN209964410U CN209964410U CN201920277558.2U CN201920277558U CN209964410U CN 209964410 U CN209964410 U CN 209964410U CN 201920277558 U CN201920277558 U CN 201920277558U CN 209964410 U CN209964410 U CN 209964410U
- Authority
- CN
- China
- Prior art keywords
- steel mesh
- turning plate
- tin
- hole
- smt
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- 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.)
- Expired - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 49
- 239000010959 steel Substances 0.000 title claims abstract description 49
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000011324 bead Substances 0.000 title claims description 14
- 230000002265 prevention Effects 0.000 title claims description 10
- 238000005516 engineering process Methods 0.000 title claims description 5
- 230000007306 turnover Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 238000003466 welding Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004100 electronic packaging Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
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- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
The utility model provides a SMT pastes dress tin pearl structure of preventing of steel mesh for dress, it includes the steel mesh body, is provided with a plurality of punch combination spares on the steel mesh body, and the punch combination spares including two hole units that the symmetry set up, and the hole unit is semi-circular hole, and two hole unit symmetries set up, and the bottom surface of hole unit forms and connects the face, turns over the semicircle board that the board is middle fretwork, turns over the inner wall that the outer wall of board hugs closely the hole unit, turns over the underrun upset adapting unit upset connection of board and connects on connecting the. Design this utility model's aim at and guarantee to reduce the trompil area under the full condition of welding seam to reduce the tin volume, solve because of the unreasonable tin pearl problem that leads to of tin volume, improve the quality of product.
Description
Technical Field
The utility model relates to a SMT surface mounting field particularly, relates to a SMT pastes tin pearl structure of preventing of subsides steel mesh for dress.
Background
The SMT surface mount technology is one of the most popular electronic product packaging methods at present, and is a new generation of electronic packaging technology, which compresses conventional electronic components into devices having a volume of only a few tenths. Therefore, the high-density, high-reliability, miniaturization, low cost and production automation of PCB proofing processing electronic product assembly are realized.
In the surface mounting process, tin beads may be generated due to various reasons such as mismatching between a bonding pad and a component, vibration and the like, and short circuit of a circuit board may be caused due to the existence of the tin beads, so that the quality of a product is affected.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a SMT pastes dress tin pearl structure of preventing of steel mesh for dress, aim at guarantees to reduce the trompil area under the full condition of welding seam to reduce the tin volume, solve because of the unreasonable tin pearl problem that leads to of tin volume, improve the quality of product.
The utility model provides a SMT pastes dress tin pearl structure of preventing of steel mesh for dress, it includes the steel mesh body, is provided with a plurality of punch combination spares on the steel mesh body, and the punch combination spares including two hole units that the symmetry set up, and the hole unit is semi-circular hole, and two hole unit symmetries set up, and the bottom surface of hole unit forms and connects the face, turns over the semicircle board that the board is middle fretwork, turns over the inner wall that the outer wall of board hugs closely the hole unit, turns over the underrun upset adapting unit upset connection of board and connects on connecting the.
The utility model provides a pair of SMT pastes dress steel mesh prevent tin pearl structure with steel mesh through the steel mesh trompil structure that optimizes, reduces the tin volume, solves the tin pearl problem that leads to because of the tin volume is unreasonable, improves the quality of product.
Therefore, compared with the prior art, the steel mesh optimized structure for preventing the generation of the tin bead of the embodiment mainly has the following advantages:
1) the area of the opening is reduced, the tin amount is reduced, and the problem of tin balls caused by unreasonable tin amount is solved.
2) The plate turnover structure enables the utility model to adapt to the processing of more types of patches.
3) Simple structure and easy processing and maintenance.
Furthermore, the turning plate is a Z-shaped turning plate, the turning plate is divided into an upper turning plate and a lower turning plate, the lower turning plate is tightly attached to the lower surface of the steel mesh body, and the turning connecting component is arranged on the upper surface of the steel mesh body.
In foretell SMT pastes dress tin pearl structure of preventing with steel mesh, as further scheme, turn over the board down and can detain the steel mesh body when turning over the board and turn over to the level, prevent to turn over the board and excessively overturn.
Further, the outer wall of the turning plate is an inclined surface, and the inclined surface extends downwards from the outer side of the turning plate to the inner side of the turning plate in an inclined mode.
In foretell SMT pastes dress tin pearl structure of preventing with steel mesh, as further scheme, the inclined plane design of turning over the board outer wall has guaranteed the flexibility ratio that turns over the board upset.
Further, the pitch of the two symmetrical hole units is 2.3 mm.
In the solder ball prevention structure of the steel mesh for SMT mounting, as a further scheme, two hole units which are symmetrically distributed and have a distance of 2.3 millimeters are arranged in order to match the welding positions of the electronic components.
Further, the material of the flap is steel.
In the solder ball prevention structure of the SMT mounting steel mesh, as a further scheme, steel is high-temperature resistant, and high-temperature resistant materials are needed when soldering tin.
Further, the hollowed-out part of the turning plate is semicircular.
In foretell SMT pastes dress and uses tin pearl structure of preventing of steel mesh, as further scheme, the fretwork part designs into semi-circular full degree that had both guaranteed soldering tin, easily production simultaneously.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a top view of a tin bead prevention structure of an SMT steel mesh for mounting.
Fig. 2 is a cross-sectional view of an anti-solder ball structure of an SMT steel mesh for mounting.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The first embodiment is as follows:
referring to fig. 1 and fig. 2, the utility model provides a pair of solder ball-proof structure of SMT pastes dress steel mesh that the embodiment of the utility model provides, it includes steel mesh body 1, be provided with a plurality of hole subassemblies 11 on the steel mesh body 1, hole subassembly 11 includes two hole units 12 that the symmetry set up, hole unit 12 is semi-circular hole, two hole unit 12 symmetries set up, the bottom surface of hole unit 12 forms and connects face 13, turn over the semicircle board that board 2 is middle fretwork, turn over the inner wall 22 that the hole unit is hugged closely to outer wall 21 of board 2, turn over the bottom surface 23 of board 2 and connect on connecting face 13 through upset adapting unit 24 upset.
The turning plate 2 is a Z-shaped turning plate, the turning plate is divided into an upper turning plate 25 and a lower turning plate 26, the lower turning plate 26 is tightly attached to the lower surface of the steel mesh body 1, the turning connecting component 24 is arranged on the upper surface of the steel mesh body 1, the outer wall 21 of the turning plate 2 is an inclined plane, the inclined plane extends downwards in the circumferential direction of the outer side of the turning plate 2 towards the circumferential direction of the inner side of the turning plate 2, the distance between the two symmetrical hole units 12 is 2.3 mm, the turning plate 2 is made of steel, and the shape of the hollowed-out.
The utility model provides a pair of SMT pastes dress steel mesh prevent tin pearl structure with steel mesh through the steel mesh trompil structure that optimizes, reduces the tin volume, solves the tin pearl problem that leads to because of the tin volume is unreasonable, improves the quality of product.
Therefore, compared with the prior art, the tin bead prevention structure of the steel mesh for SMT mounting according to the embodiment mainly has the following advantages:
1) the area of the opening is reduced, the tin amount is reduced, and the problem of tin balls caused by unreasonable tin amount is solved.
2) The plate turnover structure enables the utility model to adapt to the processing of more types of patches.
3) Simple structure and easy processing and maintenance.
Example two:
referring to fig. 1 and fig. 2, in the tin bead prevention structure of the SMT steel mesh for mounting, according to the second embodiment of the present invention, the following technical solutions are further made in the present embodiment on the basis of the above embodiments: a turning plate is further arranged on the semicircular hollow part of the turning plate 2 in the same way as the turning plate 2 and the hole unit 12, so that the turning plate can adapt to the welding of smaller electronic elements.
Example three:
referring to fig. 1, a tin bead prevention structure of a steel mesh for SMT mounting according to a third embodiment of the present invention is shown, and on the basis of the above embodiments, the present embodiment further provides the following technical solutions as improvements: the hole unit 12 and the hollowed-out part of the turning plate 2 are designed to be circular or oval, so that the soldering tin can be fuller.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. The utility model provides a tin pearl structure is prevented with steel mesh to SMT subsides which characterized in that includes:
the steel mesh body (1), a plurality of hole assemblies (11) are arranged on the steel mesh body (1), each hole assembly (11) comprises two symmetrically arranged hole units (12), each hole unit (12) is a semicircular hole, the two hole units (12) are symmetrically arranged, and a connecting surface (13) is formed on the bottom surface of each hole unit (12);
the turning plate (2) is a semicircular plate with a hollow middle part, the outer wall (21) of the turning plate (2) is tightly attached to the inner wall (22) of the hole unit, and the bottom surface (23) of the turning plate (2) is connected to the connecting surface (13) in a turning mode through a turning connecting component (24).
2. The tin bead prevention structure of the steel mesh for the SMT according to claim 1, wherein the turning plate (2) is a Z-shaped turning plate, the turning plate is divided into an upper turning plate (25) and a lower turning plate (26), the lower turning plate (26) is tightly attached to the lower surface of the steel mesh body (1), and the turnover connection member (24) is arranged on the upper surface of the steel mesh body (1).
3. The tin bead prevention structure of an SMT (surface mount technology) steel mesh according to claim 1 or 2, wherein the outer wall (21) of the turning plate (2) is a slope that extends from the outer side of the turning plate (2) to the inner side of the turning plate (2) in a circumferential direction and obliquely downward.
4. An anti-tin bead structure of a steel net for SMT according to claim 1, wherein a distance between two symmetrical hole units (12) is 2.3 mm.
5. An anti-tin bead structure of a steel mesh for SMT according to claim 1, wherein the material of the turning plate (2) is steel.
6. An anti-tin-bead structure of a steel mesh for SMT according to claim 1, wherein the hollowed-out portion of the turning plate (2) is semicircular in shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920277558.2U CN209964410U (en) | 2019-03-05 | 2019-03-05 | Tin bead prevention structure of steel mesh for SMT (surface mount technology) mounting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920277558.2U CN209964410U (en) | 2019-03-05 | 2019-03-05 | Tin bead prevention structure of steel mesh for SMT (surface mount technology) mounting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209964410U true CN209964410U (en) | 2020-01-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920277558.2U Expired - Fee Related CN209964410U (en) | 2019-03-05 | 2019-03-05 | Tin bead prevention structure of steel mesh for SMT (surface mount technology) mounting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209964410U (en) |
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2019
- 2019-03-05 CN CN201920277558.2U patent/CN209964410U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200117 |