EP0348871A2 - Fuse puller - Google Patents
Fuse puller Download PDFInfo
- Publication number
- EP0348871A2 EP0348871A2 EP89111621A EP89111621A EP0348871A2 EP 0348871 A2 EP0348871 A2 EP 0348871A2 EP 89111621 A EP89111621 A EP 89111621A EP 89111621 A EP89111621 A EP 89111621A EP 0348871 A2 EP0348871 A2 EP 0348871A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuse
- puller
- compact
- insertion opening
- fuse puller
- 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.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/0208—Tools for inserting and removing fuses
Definitions
- the invention relates to a fuse puller for pulling a blade-type fuse.
- a blade-type fuse 3 comprises sheet-like blades 3b and 3b serving as male terminals and connected together by a fuse wire (not shown), and an electrically insulative resin covering the upper portions of the blades 3b and 3b. the upper end portion of the resin defines a head portion 3a whose opposite sides project away from each other.
- the blade-type fuse 3 is adapted to fit in a female terminal provided within a fuse box (not shown).
- the female terminal holds the blades 3b and 3b by a strong resilient force to positively keep the contact between them. Consequently, it is not easy to pull the blade-type fuse 3 out of the female terminal. For this reason, a fuse puller 4, as shown in Fig. 8, is used.
- the blade-type fuse 3 has stepped portions 3c provided as a result of the formation of the enlarged head portion 3a.
- the fuse puller 4 has a pair of legs 4b formed integrally with opposite sides of a spring portion 4a, and each leg 4b has an engaging pawl 4c formed at its lower end. As shown in Figs. 9(b) and 9(c), the engaging pawls 4c are engaged with the stepped portions 3c of the fuse 3 to hold the fuse under the resilient force of the spring portion 4a. Then, the fuse puller 4 is pulled in the direction of an arrow P to pull the fuse 3 out of the female terminal.
- FIG. 7 In addition to the blade-type fuse as shown in Fig. 7, another blade type fuse of a smaller size, as shown in Fig. 3, has recently been used. Such a compact-size blade-type fuse has no enlarged head portion, and therefore cannot be pulled out of the female terminal with the conventional fuse puller, and difficulty is encountered in pulling such from a terminal fuse.
- the present invention has been made in view of the above problems, and an object of this invention is to provide a fuse puller for pulling from a terminal a compact-size fuse of the blade-type.
- a fuse puller comprising a hollow flexible body of a rectangular parallelepipedic shape, having a fuse insertion opening slightly greater in size than a head portion of a blade-type fuse; and at least one projection formed on an inner surface of said rectangular parallelepipedic body in the vicinity of the insertion opening and being engageable in a groove formed in the fuse.
- Figs. 3 and 4 show the compact-size fuse 2 of the blade-type (hereinafter referred to as "compact fuse") , with respect to which a fuse puller of the present invention can be used.
- the compact fuse 2 comprises sheet-like blades 2c and 2c serving as male terminals and connected together by a fuse wire 2d, and an electrically-insulative resin covering the upper portions of the blades.
- a head portion 2a is not enlarged, and instead two grooves 2b are formed in each of the opposite sides or faces of the resin portion.
- the compact fuse 2 is adapted to be fitted in a female terminal, for example, of a fuse box of an automobile.
- Fig. 1 shows the appearance of the fuse puller 1 provided according to the present invention.
- the fuse puller 1 includes a hollow body 1a of a rectangular parallelepiped shape and made of a flexible material such as a resin.
- the hollow body 1a has a square cross-section and has opposite open ends.
- One open end 1b of the rectangular parallelepiped body 1a serves as a fuse insertion opening.
- the longitudinal dimension W′ of the fuse insertion opening 1b is slightly greater than the longitudinal dimension W of the head portion of the fuse, and the transverse dimension H′ of the fuse insertion opening 1b is generally equal to or slightly greater than the transverse dimension H of the head portion of the fuse.
- the body 1a has projections 1c formed on the inner surface thereof adjacent to the insertion opening 1b, the projections 1c being adapted to be received respectively in the grooves 2b formed in the compact fuse 2.
- Figs. 2(a) to 2(c) are corss-sectional views, of the fuse puller 1 of Fig. 1.
- the fuse puller 1 can be deformed as indicated in dots-and-dash line in Fig. 2(a) due to its own flexible nature.
- the manner of use of the fuse puller 1 will now be described.
- the compact fuse 2 fits in a female terminal (not shown) in such a condition as shown in Fig. 5(a).
- the fuse puller 1 is engaged with the compact fuse 2, and a force F is applied to the fuse puller 1 as indicated in Fig. 1 to press-fit the fuse puller 1 on the compact fuse 2.
- Each of the projections 1c formed in the vicinity of the insertion opening 1b has an inclined front surface to facilitate entry of the compact fuse 2 into the fuse puller 1. Since the insertion opening 1b of the fuse puller 1 is slightly greater than the head portion of the compact fuse 2, the fuse puller 1 is expanded as shown in Fig. 2(a), and the compact fuse 2 is forced into the insertion opening 1b of the thus expanded fuse puller 1.
- the number of the projections 1c is equal to the number of the grooves 2b, that is to say, four, the number of the projections 1c may be less than the number of the groove 2b if there is no problem from the standpoint of the strength.
- the provision of at least one pair of opposed projections 1c or at least one projection 1c may be sufficient.
- the open end 1d of the fuse puller 1 of the present invention opposite to the insertion opening 1b is also open, as shown in Fig. 6.
- the fuse puller 1 is inclined as shown in Fig. 6(b) after the compact fuse 2 is pulled out of the female terminal as shown in Fig. 6(a)
- the compact fuse 2 is discharged from the open end 1d by itself.
- the fuse puller of a simple construction for pulling the compact fuse can be provided, and the pulling of the fuse out of the female terminal, which has conventionally been carried out with the fingers, etc., with much difficulty, can be easily done.
- the fuse puller of the present invention is of such a construction that it can be easily molded of a resin, for example, by injection molding.
Landscapes
- Fuses (AREA)
Abstract
Description
- The invention relates to a fuse puller for pulling a blade-type fuse.
- As shown in Fig. 7, a blade-
type fuse 3 comprises sheet-like blades blades head portion 3a whose opposite sides project away from each other. - The blade-
type fuse 3 is adapted to fit in a female terminal provided within a fuse box (not shown). The female terminal holds theblades type fuse 3 out of the female terminal. For this reason, afuse puller 4, as shown in Fig. 8, is used. - The manner of use of
fuse puller 4 will now be described with reference to Figs. 9(a) to 9(c). The blade-type fuse 3 has steppedportions 3c provided as a result of the formation of the enlargedhead portion 3a. Thefuse puller 4 has a pair oflegs 4b formed integrally with opposite sides of a spring portion 4a, and eachleg 4b has anengaging pawl 4c formed at its lower end. As shown in Figs. 9(b) and 9(c), theengaging pawls 4c are engaged with thestepped portions 3c of thefuse 3 to hold the fuse under the resilient force of the spring portion 4a. Then, thefuse puller 4 is pulled in the direction of an arrow P to pull thefuse 3 out of the female terminal. - In addition to the blade-type fuse as shown in Fig. 7, another blade type fuse of a smaller size, as shown in Fig. 3, has recently been used. Such a compact-size blade-type fuse has no enlarged head portion, and therefore cannot be pulled out of the female terminal with the conventional fuse puller, and difficulty is encountered in pulling such from a terminal fuse.
- The present invention has been made in view of the above problems, and an object of this invention is to provide a fuse puller for pulling from a terminal a compact-size fuse of the blade-type.
- The above object is achieved by providing a fuse puller comprising a hollow flexible body of a rectangular parallelepipedic shape, having a fuse insertion opening slightly greater in size than a head portion of a blade-type fuse; and at least one projection formed on an inner surface of said rectangular parallelepipedic body in the vicinity of the insertion opening and being engageable in a groove formed in the fuse.
-
- Fig. 1 is a perspective view of a fuse puller provided in accordance with the present invention;
- Fig. 2(a) is a front-elevational view of the fuse puller;
- Fig. 2(b) is a cross-sectional view taken along the line A-A of Fig. 2(a);
- Fig. 2(c) is a cross-sectional view taken along the line B-B of Fig. 2(a);
- Fig. 3 is a perspective view of a compact-size blade-type fuse;
- Fig. 4(a) is a cross-sectional view taken along the line C-C of Fig. 3;
- Fig. 4(b) is a view as viewed in a direction of an arrow D of Fig. 3;
- Fig. 5(a) is a longitudinal cross-sectional view of the compact-size blade-type fuse;
- Fig. 5(b) is a longitudinal cross-sectional view, showing the engagement between the compact-size blade-type fuse and the fuse puller;
- Fig. 6(a) is a partial cross-sectional view, showing the engagement between the compact-size blade-type fuse and the fuse puller;
- Fig. 6(b) is a cross-sectional view, showing the condition in which the compact-size blade-type fuse is about to be discharged out of the fuse puller;
- Fig. 7 is a perspective view of a conventional blade-type fuse;
- Fig. 8 is a perspective view, showing the manner in which a conventional fuse puller is used with respect to the fuse; and
- Figs. 9(a) to 9(c) show the manner of use of the conventional fuse puller: Fig. 9(a) is a view of the fuse; Fig. 9(b) is a side-elevational view of the fuse and the fuse puller engaged with each other; and Fig. 9(c) is a front-elevational view of the fuse and the fuse puller engaged with each other.
- A preferred embodiment of the invention will now be described with reference to the drawings.
- Figs. 3 and 4 show the compact-
size fuse 2 of the blade-type (hereinafter referred to as "compact fuse") , with respect to which a fuse puller of the present invention can be used. As shown in these figures, thecompact fuse 2 comprises sheet-like blades fuse wire 2d, and an electrically-insulative resin covering the upper portions of the blades. A head portion 2a is not enlarged, and instead twogrooves 2b are formed in each of the opposite sides or faces of the resin portion. Thecompact fuse 2 is adapted to be fitted in a female terminal, for example, of a fuse box of an automobile. - Fig. 1 shows the appearance of the
fuse puller 1 provided according to the present invention. Thefuse puller 1 includes ahollow body 1a of a rectangular parallelepiped shape and made of a flexible material such as a resin. Thehollow body 1a has a square cross-section and has opposite open ends. Oneopen end 1b of the rectangularparallelepiped body 1a serves as a fuse insertion opening. The longitudinal dimension W′ of the fuse insertion opening 1b is slightly greater than the longitudinal dimension W of the head portion of the fuse, and the transverse dimension H′ of the fuse insertion opening 1b is generally equal to or slightly greater than the transverse dimension H of the head portion of the fuse. Thebody 1a hasprojections 1c formed on the inner surface thereof adjacent to theinsertion opening 1b, theprojections 1c being adapted to be received respectively in thegrooves 2b formed in thecompact fuse 2. With the above configuration of thefuse puller 1, it can be molded of a resin by a single molding operation, such as injection molding. - Figs. 2(a) to 2(c) are corss-sectional views, of the
fuse puller 1 of Fig. 1. Thefuse puller 1 can be deformed as indicated in dots-and-dash line in Fig. 2(a) due to its own flexible nature. - The manner of use of the
fuse puller 1 will now be described. Thecompact fuse 2 fits in a female terminal (not shown) in such a condition as shown in Fig. 5(a). Thefuse puller 1 is engaged with thecompact fuse 2, and a force F is applied to thefuse puller 1 as indicated in Fig. 1 to press-fit thefuse puller 1 on thecompact fuse 2. Each of theprojections 1c formed in the vicinity of the insertion opening 1b has an inclined front surface to facilitate entry of thecompact fuse 2 into thefuse puller 1. Since the insertion opening 1b of thefuse puller 1 is slightly greater than the head portion of thecompact fuse 2, thefuse puller 1 is expanded as shown in Fig. 2(a), and thecompact fuse 2 is forced into the insertion opening 1b of the thus expandedfuse puller 1. When theprojections 1c slide over the head portion 2a of the compact fuse and reach therespective grooves 2b, theprojections 1c are received respectively in thegrooves 2b as shown in Fig. 5(b) whereupon thefuse puller 1 is returned to its original shape. When thefuse puller 1 is pulled in a direction of an arrow P (Fig. 5(b)), eachprojection 1c is held against ashoulder 2e provided at the head portion and defined by the upper end of thegroove 2b, so that thecompact fuse 2 can be pulled out of the female terminal. In this embodiment, although the number of theprojections 1c is equal to the number of thegrooves 2b, that is to say, four, the number of theprojections 1c may be less than the number of thegroove 2b if there is no problem from the standpoint of the strength. For example, the provision of at least one pair ofopposed projections 1c or at least oneprojection 1c may be sufficient. - The manner of removing the
compact fuse 2 from thefuse puller 1 after thecompact fuse 2 is pulled out of the female terminal will now be described. Theopen end 1d of thefuse puller 1 of the present invention opposite to the insertion opening 1b is also open, as shown in Fig. 6. When thefuse puller 1 is inclined as shown in Fig. 6(b) after thecompact fuse 2 is pulled out of the female terminal as shown in Fig. 6(a), thecompact fuse 2 is discharged from theopen end 1d by itself. - As described above, according to the present invention, the fuse puller of a simple construction for pulling the compact fuse can be provided, and the pulling of the fuse out of the female terminal, which has conventionally been carried out with the fingers, etc., with much difficulty, can be easily done. Further, the fuse puller of the present invention is of such a construction that it can be easily molded of a resin, for example, by injection molding.
Claims (6)
a hollow flexible body of a rectangular parallelepiped shape having a fuse insertion opening slightly greater in size than said head portion of said blade-type fuse; and
at least one projection formed on an inner surface of said hollow flexible body in the vicinity of said insertion opening and being engageable in said groove formed in the fuse.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP84495/88U | 1988-06-28 | ||
JP8449588U JPH044345Y2 (en) | 1988-06-28 | 1988-06-28 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0348871A2 true EP0348871A2 (en) | 1990-01-03 |
EP0348871A3 EP0348871A3 (en) | 1990-12-19 |
EP0348871B1 EP0348871B1 (en) | 1995-04-26 |
Family
ID=13832226
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19890111621 Expired - Lifetime EP0348871B1 (en) | 1988-06-28 | 1989-06-26 | Fuse puller |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0348871B1 (en) |
JP (1) | JPH044345Y2 (en) |
DE (1) | DE68922343T2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0710974A1 (en) * | 1994-11-02 | 1996-05-08 | Sumitomo Wiring Systems, Ltd. | Fuse puller |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0740290Y2 (en) * | 1991-09-09 | 1995-09-13 | 双葉電子工業株式会社 | Flat fuse mounting structure |
JP2539546Y2 (en) * | 1991-11-20 | 1997-06-25 | 矢崎総業株式会社 | Fuse puller |
DE10257589A1 (en) * | 2002-12-09 | 2004-07-08 | Daimlerchrysler Ag | Measurement adapter for connecting to an automotive flat type fuse is configured to allow connection to the fuse in situ so that current measurements can be made without breaking a circuit |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4414698A (en) * | 1980-02-25 | 1983-11-15 | Kastar, Inc. | Autombile fuse puller and combination circuit tester |
US4475283A (en) * | 1982-04-01 | 1984-10-09 | Littelfuse, Inc. | Combination fuse puller and fuse condition indicator |
US4541311A (en) * | 1982-05-03 | 1985-09-17 | Idea Pioneer, Inc. | Fuse puller |
-
1988
- 1988-06-28 JP JP8449588U patent/JPH044345Y2/ja not_active Expired
-
1989
- 1989-06-26 DE DE1989622343 patent/DE68922343T2/en not_active Expired - Fee Related
- 1989-06-26 EP EP19890111621 patent/EP0348871B1/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4414698A (en) * | 1980-02-25 | 1983-11-15 | Kastar, Inc. | Autombile fuse puller and combination circuit tester |
US4475283A (en) * | 1982-04-01 | 1984-10-09 | Littelfuse, Inc. | Combination fuse puller and fuse condition indicator |
US4541311A (en) * | 1982-05-03 | 1985-09-17 | Idea Pioneer, Inc. | Fuse puller |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0710974A1 (en) * | 1994-11-02 | 1996-05-08 | Sumitomo Wiring Systems, Ltd. | Fuse puller |
US5666865A (en) * | 1994-11-02 | 1997-09-16 | Sumitomo Wiring Systems, Ltd. | Fuse puller |
Also Published As
Publication number | Publication date |
---|---|
DE68922343T2 (en) | 1995-08-31 |
EP0348871A3 (en) | 1990-12-19 |
JPH044345Y2 (en) | 1992-02-07 |
JPH027843U (en) | 1990-01-18 |
DE68922343D1 (en) | 1995-06-01 |
EP0348871B1 (en) | 1995-04-26 |
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