CN102760614B - The manufacture method of tubular current fuse - Google Patents
The manufacture method of tubular current fuse Download PDFInfo
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- CN102760614B CN102760614B CN201210128297.0A CN201210128297A CN102760614B CN 102760614 B CN102760614 B CN 102760614B CN 201210128297 A CN201210128297 A CN 201210128297A CN 102760614 B CN102760614 B CN 102760614B
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Abstract
The present invention provides the manufacture method of tubular current fuse, even if there is corner in the through hole inner edge portion of ceramic cylinder end face in this tubular current fuse, it also is able in the through hole of ceramic cylinder to open obliquely set fuse, when this fuse is applied tension force, the end of this fuse is fixed to above-mentioned body end surface。In there is the manufacture method of tubular current fuse opening the structure setting fuse (16) in the through hole (12) that ceramic cylinder (11) is internal obliquely, when being fixed by through hole (12) by fuse (16), it is formed with scolding tin (15) in the edge of the through hole (12) of cylinder (11) both ends of the surface。When fuse (16) is fixed by through hole (12), fuse (16) is stretched along the end face of cylinder (11), make it be fused to the scolding tin (15) of the end face of cylinder (11) fuse (16) heating, and cut off fuse (16)。
Description
Technical field
The present invention relates to preferably tubular current fuse and manufacture method thereof that the substrate surface being arranged on electronic equipment etc. uses。
Background technology
The small current fuse of surface installation can be carried out to printed base plate etc. and be suggested various forms since in the past。Such as in patent documentation 1, disclose inside be provided with through hole tubular the housing body formed by pottery in set fuse, and make metal lid be entrenched in the tubular current fuse at two ends of this housing body。
In patent documentation 2, disclose in the hollow space of the rectangular-shaped enclosure interior making the housing body formed by pottery chimeric with lid and to be formed, open the tubular current fuse being provided with fuse。For this tubular current fuse, there is the structure due to complicated housing body and lid and cost improves such problem。
To this, because the tubular current fuse recorded in patent documentation 1 is to open the structure setting fuse in the through hole within ceramic cylinder obliquely, so the structure of ceramic cylinder itself is more simple。, the current fuse of this structure exists problem below。Namely, although in ceramic cylinder through hole, it is good that edge is connected to ceramic cylinder end face via the fillet (radius of curvature R) of appropriateness, but the fillet (radius of curvature R) being formed uniformly this appropriateness is difficult on manufacturing。
Different at actual ceramic product mean curvature radius R, sometimes almost without the through hole edge of radius of curvature R close to vertically (angle is sharpened)。In this case, when carrying out setting when fuse is applied tension force, owing to through hole Inner peripheral portions (corner) fuse at ceramic cylinder produces friction, so the problem that existence can damage fuse。Further, if fuse damage, thickness changes, then resistance changes, and the portion of electrical current in fuse damage is concentrated, and operating chacteristics is unstable, in the worst case, it is also possible to can cut off because of mechanical stress。
If additionally, do not damage fuse and loosely open when setting, when chimeric lid, scolding tin are melted, there is problem below, i.e. not only fuse can relax, fuse element length is unstable, and owing to fuse is attached on the internal wall of ceramic cylinder, operating chacteristics is unstable sometimes。
Patent documentation 1: Japanese Unexamined Patent Publication 6-342623 publication
Patent documentation 2: Japanese Unexamined Patent Publication 8-162000 publication
Summary of the invention
The present invention is based on above-mentioned situation and proposes, its object is to, fuse is not damaged in the through hole edge providing a kind of ceramic cylinder end face, the through hole of ceramic cylinder is opened obliquely and sets fuse, and under the state to this fuse applying tension force, it is possible to the end of this fuse is fixed to the manufacture method of the tubular current fuse of above-mentioned body end surface。
The present invention is the manufacture method of a kind of tubular current fuse, this tubular current fuse has opens, in the through hole 12 within ceramic cylinder 11, the structure setting fuse 16 obliquely, it is characterized in that, when making fuse 16 by through hole 12 and fixing, it is formed with the scolding tin 15 (with reference to Fig. 5) of orifice ring shape in the edge of the through hole 12 of cylinder 11。Thereby, it is possible to the edge of the through hole 12 contacted by fuse 16 is formed as the round and smooth curved surface R of the scolding tin soft with ceramic phase ratio, it is possible to reduce the stress putting on fuse 16, the damage of fuse 16 can be prevented。
In addition, it is characterised in that when fuse 16 is passed through through hole 12 and be fixing, fuse 16 is stretched along the end face of ceramic cylinder 11, fuse 16 heating makes it be fused to the scolding tin of the end face of cylinder 11 15, and cuts off fuse (with reference to Fig. 5)。Thereby, it is possible to tilted by this fuse and without being loosely located at inside through hole 12 when fuse 16 is applied tension force, the deterioration of the operating chacteristics lax based on fuse 16 can be prevented。It addition, because fuse 16 is cut off in scolding tin 15 part of body end surface, so without fuse 16 is pulled out to cylinder outer peripheral face, it is possible to simplify the structure of cylinder 11 itself。
Accompanying drawing explanation
Fig. 1 is the scolding tin forming orifice ring shape at ceramic cylinder end face, opens the sectional view in the stage setting and cutting off fuse。
Fig. 2 is the sectional view being configured with discoideus scolding tin plate on ceramic cylinder end face。
Fig. 3 is the sectional view of the part covering through hole part utilizing the die-cut scolding tin plate being arranged in body end surface of drill jig。
Fig. 4 is the sectional view in the stage of the scolding tin being formed with orifice ring shape。
Fig. 5 is a sectional view in the stage setting and cutting off fuse。
Fig. 6 is turned off the sectional view after fuse。
Fig. 7 is the sectional view in stage being fitted together to lid at barrel end。
Fig. 8 is the axonometric chart in stage being fitted together to lid at barrel end。
Fig. 9 is chimeric at barrel end and the amplification view in the stage of scolding tin joint lid。
Figure 10 indicates that the figure of the variation of Fig. 7。
Detailed description of the invention
Hereinafter, with reference to Fig. 1～Figure 10, embodiments of the present invention are described。It addition, in the various figures, same or equivalent component or key element are marked identical accompanying drawing labelling and illustrate。
Fig. 1 represents the summary of the tubular current fuse of the present invention。This fuse is tubular current fuse, including: the cylinder 11 of pottery；It is fixed on the electrode cap 18 at the two ends of this cylinder；And be arranged in the inside through hole 12 of cylinder and open the fuse 16 being located between electrode cap 18,18 obliquely, it is characterized in that, the scolding tin 15 of the orifice ring shape that this tubular current fuse is formed with including extending to the inner surface of cylinder 11 from the end face of cylinder 11, is fixed on the end face side of the cylinder of scolding tin 15 by fuse 16 (fixing) temporarily。
Further, the end of fuse 16 is not up to the peripheral part of cylinder 11。That is, the end of fuse 16 is fixed on the scolding tin 15 on the end face being located at cylinder 11, is cut off in the part fixed。During fixing lid 18 later, utilizing the scolding tin 20 that the scolding tin 15 of the edge covering through hole 12 melt with the scolding tin 19 being seated in lid 18 and is integrally forming, the end of fuse 16 is connected and fixed on the inner surface (reference Fig. 7, Fig. 9) of lid 18。
Thus, fuse is pulled out to the outer peripheral face of cylinder in the past, is housed in the groove of being located at outer peripheral face etc. and fixes temporarily, and the end of fuse when fuse is applied tension force, can be fixed on scolding tin 15 and cut off by the present invention。Thus, when fuse is applied tension force, it is possible to tilt and set without loosely opening, and the groove etc. of conventional cylinder outer peripheral face need not be located at, it is possible to be simplified the tubular current fuse of structure。
Fig. 2～Figure 10 represents the manufacture method of the tubular current fuse of one embodiment of the invention。First, as in figure 2 it is shown, prepare the internal ceramic cylinder that profile is substantially prism-shaped 11 with through hole 12。Then, the end face of cylinder 11 configures discoideus scolding tin plate 13。Preferred scolding tin plate 13 has hardness to form round and smooth curved surface R in cylinder edge, and uses as the scolding tin formation that unleaded Sn-Cu is 4%～15%。
Then, as it is shown on figure 3, utilize drill jig (punch press) 14 from die-cut to through hole 12 on scolding tin plate 13。Thus, scolding tin plate 13 deforms, as shown in Figure 4, in the edge (corner) of through hole 12 of the end face of ceramic cylinder 11, forming the scolding tin 15 of orifice ring shape, this scolding tin 15 scolding tin part 15a by ring-type and the scolding tin part 15b from this scolding tin part 15a inner peripheral surface extending to through hole is constituted。As described above, by utilizing the scolding tin of the die-cut tabular of drill jig 14, the opening portion of cylinder 11 is covered by scolding tin 15, forms round and smooth curved surface R with extending to internal face from the end face of cylinder 11。Example illustrated only represents the end face of cylinder 11, but at the both ends of the surface formation scolding tin 15 of cylinder 11。
Then, as it is shown in figure 5, fuse 16 is located in through hole 12 obliquely。Specifically, utilize not shown drill jig to keep cylinder 11, make the fuse 16 through hole 12 by cylinder 11。Keep the both ends of fuse 16, make the both ends end face relative to ceramic cylinder of fuse 16, apply tension force F to almost parallel and opposite direction。That is, in the not shown end of fuse 16, tension force is applied to and opposite direction almost parallel with the tension force F of the end of diagram。Fuse 16 contacts scolding tin 15 when opening with tension force F and setting, and keeps tension force F。Fuse 16 is contacted with scolding tin 15 in the state lower slider bearing tension force F, but scolding tin 15 is the scolding tin of hard, is formed with round and smooth curved surface R at Inner peripheral portions, therefore, compared with the corner of conventional ceramic cylinder, it is possible to reduce the amount rubbed and damage。It addition, for tension force F, be enough so that the less tension force that fuse 16 is set as unflagging degree can be made。
In this stage, make the fuse 16 on the tip contact scolding tin 15a of heating 17。The contact portion moment of the heating crown end of fuse 16 is heated to more than the fusing point of scolding tin。By this heating, fuse 16 is fused to scolding tin 15a, additionally, fuse is in the tip portion softening of heating head。Because fuse 16 utilizes tension force F to stretch, so in the tip portion of heating head, the part that namely softens, fuse is cut off。Fig. 6 represents the state after the cut-out of fuse 16。In this condition, the end 16a of fuse 16 is fixed on the end face of ceramic cylinder 11, and this fuse 16 maintains tension force F and tilts and be located in through hole 12 without loosely opening。Example illustrated only represents the end face of ceramic cylinder 11, but at the both ends of the surface formation fuse fixed part 16a of ceramic cylinder 11。Scolding tin 15, due to heating 17 deforms by pressure and heating, is projected into through hole 12 internal。The scolding tin 15 highlighted includes being simultaneously filled in through hole 12 of fuse 16。
It addition, in the manufacture method of current fuse, cutting off fuse has various method。First, there is the method utilizing cutter to carry out cutting off。It addition, when utilizing cutter to cut off, because blade has the life-span, so needing periodic replacement。Then, there is the method utilizing tensile load to carry out cutting off。But, in this case, for instance fuse maximum gauge is needed to the load of 1kg, equipment spends relatively big, additionally, due to breaking load puts on fuse entirety, so while fuse extends, breaking portion is likely not necessarily。Also there is the method being undertaken cutting off by conquassation fuse。But, existing and fuse is caused bending equivalent damage, characteristic reduces such problem。For said method, because utilizing the power of pressing fuse and the heat of welding, the softening point at fuse is cut off by tension force, so not producing the damage such problem of fuse, it is possible to be readily switched off with easy device structure。
Then, as shown in Figure 7 and Figure 8, the lid 18 that inside comprises scolding tin 19 is embedded in the both ends of ceramic cylinder 11。In fig. 8, represent the state exposed of fuse end 16a, but as shown in Fig. 6 etc., all or part of of fuse end 16a is covered by scolding tin 15a。Then, heating cover 18 makes scolding tin 19,15 melt, and fuse end 16a is engaged in lid 18。This state representation is in Fig. 9。Here, scolding tin 20 is melted by scolding tin 19,15 and is formed。The operation that this lid is chimeric completes the manufacturing process of the current fuse of the present invention。It addition, at this moment, fuse 16 is more or less lax from the state shown in Fig. 6, but slack is very little。Further, because fuse end 16a utilizes the scolding tin 19,15 of identical material to be fixed in embedding shape, it is possible to without organic matter etc., make operating chacteristics good。In addition it is also possible to form protuberance 18c as shown in Figure 10 in lid 18。Thus, the lid 18 of the end being entrenched in cylinder 11 is difficult to extract。It addition, at Fig. 7, Tu10Zhong, it is illustrated that the scolding tin 19 within lid, but, as long as the amount of the scolding tin of the orifice ring shape originally formed is sufficiently used for connecting fuse 16 and lid 18, it is possible to omit lid scolding tin 19 within 18。
Manufacture method according to above-mentioned current fuse, by the through hole edge in body end surface, utilize drill jig die-cut and form scolding tin, regardless of the shape of the edge (corner) of bottom ceramic cylinder, all forming round and smooth curved surface R at the Inner peripheral portions of scolding tin。Thereby, it is possible to make the through hole edge that fuse contacts become round and smooth curved surface R, and the scolding tin that ratio pottery is soft can be formed, it is possible to put on the stress of fuse when reducing fixing fuse, it is possible to reduce the damage of fuse。Additionally, more preferably and cover the said method of Inner peripheral portions with the scolding tin utilizing orifice ring shape and be pre-formed the structure of fillet (radius of curvature R) of appropriateness at the Inner peripheral portions of ceramic cylinder and edge, periphery。
Additionally, when making fuse pass through through hole and be fixing, make fuse stretch along body end surface, fuse is fixed on the scolding tin of body end surface, and by cutting off fuse, it is possible to when fuse is applied tension force, this fuse tilted and be located in through hole without loosely opening。Thereby, it is possible to reduce the deterioration based on the operating chacteristics causing contact through hole internal face etc. because fuse is lax。
It addition, when fixing fuse, fuse is cut off in the scolding tin part of body end surface。Thus, it is not necessary to fuse is pulled out to cylinder outer peripheral face, it is not necessary to groove 2 necessary in patent documentation 1, it is possible to simplify the structure of cylinder itself, it is possible to simplify manufacturing process。Thus, according to the present invention, it is easy to operation by automatization, it is possible to the tubular current fuse that the deviation of volume production operating chacteristics is little。
It is explained above one embodiment of the present invention, but the present invention is not limited to above-mentioned embodiment, it is of course possible to implement in a variety of ways in the scope of the thought of its technology。
Industrial applicability
The present invention can be used in manufacture and install preferably tubular current fuse for surface。
Claims (5)
1. a manufacture method for tubular current fuse, this tubular current fuse has opens the structure setting fuse obliquely in the through hole within ceramic cylinder, it is characterised in that
The end face of above-mentioned cylinder configures scolding tin plectane, utilize drill jig to be punched out to above-mentioned through hole, thus, form scolding tin in the through hole edge of the end face of above-mentioned cylinder, this scolding tin scolding tin part by ring-type and the scolding tin part from the inner peripheral surface of the above-mentioned through hole of this scolding tin part extension are constituted
Above-mentioned fuse is made by above-mentioned through hole and to utilize above-mentioned scolding tin to fix above-mentioned fuse。
2. the manufacture method of tubular current fuse according to claim 1, it is characterised in that
When making above-mentioned fuse by above-mentioned through hole and fixing, make above-mentioned fuse stretch along above-mentioned cylinder both ends of the surface, above-mentioned fuse is fixed on the above-mentioned scolding tin of above-mentioned cylinder both ends of the surface, and cuts off above-mentioned fuse。
3. the manufacture method of tubular current fuse according to claim 1, it is characterised in that
Above-mentioned scolding tin uses the scolding tin that Sn-Cu is 4%～15% that is unleaded and that have hardness to be formed。
4. a tubular current fuse, including: the cylinder of pottery；It is fixed on the electrode cap at the two ends of this cylinder；And be arranged at the inside of above-mentioned cylinder and be located at the fuse between above-mentioned electrode cap, it is characterised in that
This tubular current fuse includes extending to the inner surface of above-mentioned cylinder from the end face of above-mentioned cylinder and the scolding tin that formed,
Above-mentioned fuse is fixed on the end face side of the above-mentioned cylinder of above-mentioned scolding tin, and the end being fixed on the above-mentioned fuse of the end face of above-mentioned cylinder does not arrive the peripheral part of above-mentioned cylinder,
The end of above-mentioned fuse utilizes the scolding tin in above-mentioned scolding tin and above-mentioned lid to be fixed in embedding shape。
5. tubular current fuse according to claim 4, it is characterised in that
Above-mentioned fuse is fixed with the scolding tin that the scolding tin filling in electrode cap melts and is integrally forming by the scolding tin covering through hole edge。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011100281A JP5740768B2 (en) | 2011-04-28 | 2011-04-28 | Manufacturing method of cylindrical current fuse |
| JP2011-100281 | 2011-04-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102760614A CN102760614A (en) | 2012-10-31 |
| CN102760614B true CN102760614B (en) | 2016-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210128297.0A Active CN102760614B (en) | 2011-04-28 | 2012-04-27 | The manufacture method of tubular current fuse |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5740768B2 (en) |
| CN (1) | CN102760614B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6373640B2 (en) * | 2014-05-12 | 2018-08-15 | Koa株式会社 | Manufacturing method of cylindrical current fuse |
| US20180108507A1 (en) * | 2016-10-14 | 2018-04-19 | GM Global Technology Operations LLC | Fuse element and method of fabrication |
| KR102066173B1 (en) | 2019-05-14 | 2020-01-14 | 한국단자공업 주식회사 | High voltage fuse |
| DE102019122611A1 (en) | 2019-08-22 | 2021-02-25 | Endress+Hauser SE+Co. KG | SMD-solderable component and method for producing an SMD-solderable component |
| JP7302627B2 (en) * | 2021-06-11 | 2023-07-04 | 株式会社プロテリアル | Wire connection structure, wire connection method, medical device, and method for manufacturing medical device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5235307A (en) * | 1992-08-10 | 1993-08-10 | Littelfuse, Inc. | Solderless cartridge fuse |
| US6147585A (en) * | 1997-01-30 | 2000-11-14 | Cooper Technologies Company | Subminiature fuse and method for making a subminiature fuse |
| EP0935809B1 (en) * | 1996-10-31 | 2001-03-28 | Wickmann-Werke GmbH | Electrical fuse |
| CN101807500A (en) * | 2009-02-13 | 2010-08-18 | Aem科技（苏州）有限公司 | Surface mounting fuse protector and manufacturing method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06342623A (en) * | 1993-06-01 | 1994-12-13 | S O C Kk | Chip fuse |
| US20060119465A1 (en) * | 2004-12-03 | 2006-06-08 | Dietsch G T | Fuse with expanding solder |
| US9224564B2 (en) * | 2010-06-04 | 2015-12-29 | Littelfuse, Inc. | Fuse with counter-bore body |
-
2011
- 2011-04-28 JP JP2011100281A patent/JP5740768B2/en active Active
-
2012
- 2012-04-27 CN CN201210128297.0A patent/CN102760614B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5235307A (en) * | 1992-08-10 | 1993-08-10 | Littelfuse, Inc. | Solderless cartridge fuse |
| EP0935809B1 (en) * | 1996-10-31 | 2001-03-28 | Wickmann-Werke GmbH | Electrical fuse |
| US6147585A (en) * | 1997-01-30 | 2000-11-14 | Cooper Technologies Company | Subminiature fuse and method for making a subminiature fuse |
| CN101807500A (en) * | 2009-02-13 | 2010-08-18 | Aem科技（苏州）有限公司 | Surface mounting fuse protector and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012234624A (en) | 2012-11-29 |
| CN102760614A (en) | 2012-10-31 |
| JP5740768B2 (en) | 2015-07-01 |
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