EP0324379A1 - Structure for mounting blades in scissors - Google Patents
Structure for mounting blades in scissors Download PDFInfo
- Publication number
- EP0324379A1 EP0324379A1 EP89100163A EP89100163A EP0324379A1 EP 0324379 A1 EP0324379 A1 EP 0324379A1 EP 89100163 A EP89100163 A EP 89100163A EP 89100163 A EP89100163 A EP 89100163A EP 0324379 A1 EP0324379 A1 EP 0324379A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- blades
- supporting
- portions
- plane
- 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.)
- Withdrawn
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B13/00—Hand shears; Scissors
- B26B13/02—Hand shears; Scissors with moulded-in blades
Definitions
- the present invention relates to a structure for mounting blades in scissors or shears which have a pair of scissor or shear segments supported by a pivot in the form of X, or bow scissors which have a pair of scissor segments supported by a pivot at its base end portion in the form of V.
- Fig. 4 shows one of examples of structures for mounting blades in scissors.
- notches 5 are formed on the insides of the opposite inner surfaces of a pair of blade portions 3.
- Blades 6 are fitted in the notches 5 and fixed by screws 10.
- Sliding surfaces 7 are formed adjacent to the notohes 5 on the outsides of the opposite inner surfaces of the blade portions 3.
- the inner surfaces of the blades 6 and the sliding surfaces 7 are level to each other.
- the blades 6 are attached to the notches 5 by the screws 10, so that it is difficult in view of strength to form blade mounting portions 3a of the blade portions 3 out of synthetic resin. Furthermore, the scissors can not be opened and closed without trouble if heads of the screws 10 are projected from the blades 6 which also form parts of sliding surfaces. Therefore, the screws 10 need to be buried in the blades 6. However, it is troublesome to form concave portions accurately in the blades 6 for burying the heads of the screws 10. Furthermore, in view of forming the concave portions, the thickness of the blades 6 can not be too thin.
- the present invention provides a structure for mounting a blade with a blade edge to a first side of a blade mounting portion having a sliding surface on a second side, said first side being continuous with said second side, comprising a notch formed in said second side of said blade mounting portion, and having a surface inclined toward said sliding surface, said blade being set on said inclined surface, said blade edge being on a plane including said sliding surface, said plane and said blade defining a space therebetween; and supporting means for supporting said blade, provided on said inclined surface and situated within said space.
- a pair of scissor segments 11 respectively comprises a handle 12 and a blade portion 13, and is supported by a pivot 14 in the form of X.
- Notches 15 are formed on the insides of the opposite inner surfaces of blade mounting portions 13a of both the blade portions 13. Blades 16 are mounted on the notches 15.
- a structure for mounting the blades 16 will be described in detail.
- a sliding surface 17 is formed, adjacent to the notch 15, on the outside of the opposite inner surface of the blade mounting portion 13a of each blade portion 13.
- An inner bottom surface 15a of each notch 15 forms a supporting surface for the blade 16. and is inclined toward a plane 101 including the sliding surface 17.
- a plurality of supporting projections 18, three in this embodiment, are formed on the inner bottom surface 15a of the notch 15 as means for supporting the blade 16.
- Each supporting projection 18 includes a stem portion of smaller diameter inserted into a support hole 19 of the blade 16, and a head portion 18a of larger diameter mounted on the tip of the stem portion 18b and engaging the circumference of the support hole 19 on the surface of the blade 16 away from the inner bottom surface 15a.
- the blade 16 is fitted into the notch 15 so as to be put on the inner bottom surface 15a. Then each supporting projection 18 is inserted into each of the support holes 19 formed in the blade 16, and the head portion 18a is engaged with the blade 16 so that the blade 16 is supported in the notch 15.
- the support projections 18 are integrally formed on the blade mounting portions 13a in the present embodiment. However, so long as the strength of the blade mounting portion 13a is assured, the supporting projections 18 may be formed separately and attached to the inner bottom surface 15a of the notch 16. Moreover, though the blade mounting portions 13a and supporting projections 18 are formed out of synthetic resin in this embodiment, they can be also formed out of other kinds of materials.
- a blade edge 16a of he blade 16 is on a plane including an inner edge 13b of the blade mounting portion 13a, and at the same time, on the plane 101 including the sliding surfaces 17.
- each of the blade edges 16a of the blades 16 is on the intersection line of the plane including the inner edge 13b of the blade mounting portion 13a and the plane 101 including the sliding surfaces 17.
- a space 102 is formed between the plane 101, which connects the sliding surfaces 17 with the blade edges 16a of the blades 16, and the blades 16. ln the space 102, the head portions 18a of the support projections 18 are engaged with the blades 16.
- both the scissor segments 11 described above are opened or closed, as the sliding surfaces 17 of both the blade portions 13 are being slided on each other, an object is cut by the blade edges 16a of both the blades 16.
- the space 102 is formed between the blades 16 and the plane 101 including the sliding surfaces 17, and since the head portions 18a of the supporting projections 18 supporting the blades 16 are within the same space 102, the head portions 18a of the supporting projections 18 of one scissor segment 11 do not hit and interfere with the sliding surface 17 of the other scissor segment 11.
- the open/close movement of both the scissor segments 11 is not interfered.
- the blades 6 are attached to the notches 15 using no screws but the supporting projections 18. Namely, concave portions reducing the strength of the blade mounting portions 13a are omitted from the same blade mounting portions 13a. Therefore, there arises no problem in strength if the blade mounting portions 13a of the blades 13 are formed out of synthetic resin, and the forming of the blade mounting portions 13a out of synthetic resin is realized.
- the blades 16 themselves are processed, such that the opposite inner surfaces of the blades 16 are inclined toward the plane 101 including the sliding surfaces 17.
- the inner bottom surfaces 15a of the notches 15 are inclined toward the plane 101 including the sliding surfaces 17 and the blades 16 are set on the same inner bottom surfaces 15a so that the blades 16 are automatically inclined toward the plane 101 and the space l02 is made. Therefore, there is no necessity of special processing of the blades 16 for making the space 102.
- the structure for mounting the blades 16 according to the present embodiment can naturally be applied to shears or bow scissors.
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- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Scissors And Nippers (AREA)
Abstract
A structure for mounting blades (16) into notches (15) provided on the insides of the opposite inner surfaces (17) of blade portions (13) of a pair of openable scissor segments. The notch portions (15) have inner bottom surfaces (15a), onto which blades (16) are set, and which are inclined toward sliding surfaces (17). Blade edges (16a) of the blades (16) are on a plane (101) including the sliding surfaces (17) so that spaces (102) are formed between the plane (101) and blades (16). In the notches (15), a plurality of supporting projections (18) are integrally formed on the blade portions (13) to project from inner bottom surfaces (15a). The supporting projections (18) include stem portions (18b) of smaller diameter inserted into holes (19) of the blades (16), and head portions of larger diameter (18a) provided on the tips of the stem portions (18b) and engaging circumference of the holes (19) on surfaces of the blades (16) away from supporting surfaces (15a). The head portions (18a) of the supporting projections (18) are situated in the space (102) and do not project from the plane (101) including the sliding surfaces (17).
Description
- The present invention relates to a structure for mounting blades in scissors or shears which have a pair of scissor or shear segments supported by a pivot in the form of X, or bow scissors which have a pair of scissor segments supported by a pivot at its base end portion in the form of V.
- Fig. 4 shows one of examples of structures for mounting blades in scissors. In the scissors,
notches 5 are formed on the insides of the opposite inner surfaces of a pair ofblade portions 3.Blades 6 are fitted in thenotches 5 and fixed byscrews 10. Slidingsurfaces 7 are formed adjacent to thenotohes 5 on the outsides of the opposite inner surfaces of theblade portions 3. The inner surfaces of theblades 6 and thesliding surfaces 7 are level to each other. - However, in the above described structure for mounting, the
blades 6 are attached to thenotches 5 by thescrews 10, so that it is difficult in view of strength to formblade mounting portions 3a of theblade portions 3 out of synthetic resin. Furthermore, the scissors can not be opened and closed without trouble if heads of thescrews 10 are projected from theblades 6 which also form parts of sliding surfaces. Therefore, thescrews 10 need to be buried in theblades 6. However, it is troublesome to form concave portions accurately in theblades 6 for burying the heads of thescrews 10. Furthermore, in view of forming the concave portions, the thickness of theblades 6 can not be too thin. - It is a general object of the present invention to provide a structure for mounting blades wherein the blades can surely and smoothly slide on each other without trouble during the open/close operation of scissor segments.
- It is another object of the present invention to provide a structure for mounting blades using no screws whereby blade mounting portions of blade portions can be formed out of synthetic resin.
- To achieve the foregoing objects, the present invention provides a structure for mounting a blade with a blade edge to a first side of a blade mounting portion having a sliding surface on a second side, said first side being continuous with said second side, comprising a notch formed in said second side of said blade mounting portion, and having a surface inclined toward said sliding surface, said blade being set on said inclined surface, said blade edge being on a plane including said sliding surface, said plane and said blade defining a space therebetween; and supporting means for supporting said blade, provided on said inclined surface and situated within said space.
- Other and further objects of this invention will become obvious upon an understanding of the illustrative embodiments about to be described or will be indicated in the appended claims, and various advantages not referred to herein will occur to one skilled in the art upon employment of the invention in practice.
-
- Fig. 1 is a plan view showing scissors in an open state according to an embodiment of the present invention,
- Fig. 2 is a plan view showing the same scissors in a closed state,
- Fig 3 is a section view taken along the III-III line in Fig. I,
- Fig. 4 is a sectional view showing a structure for mounting blades in the related art.
- An embodiment of the present invention will now be described with reference to Figs. 1 through 3.
- A pair of
scissor segments 11 respectively comprises ahandle 12 and ablade portion 13, and is supported by apivot 14 in the form of X.Notches 15 are formed on the insides of the opposite inner surfaces ofblade mounting portions 13a of both theblade portions 13.Blades 16 are mounted on thenotches 15. Hereinafter, a structure for mounting theblades 16 will be described in detail. - As shown in Fig. 3, a
sliding surface 17 is formed, adjacent to thenotch 15, on the outside of the opposite inner surface of theblade mounting portion 13a of eachblade portion 13. Aninner bottom surface 15a of eachnotch 15 forms a supporting surface for theblade 16. and is inclined toward aplane 101 including the slidingsurface 17. A plurality of supportingprojections 18, three in this embodiment, are formed on theinner bottom surface 15a of thenotch 15 as means for supporting theblade 16. Each supportingprojection 18 includes a stem portion of smaller diameter inserted into asupport hole 19 of theblade 16, and ahead portion 18a of larger diameter mounted on the tip of thestem portion 18b and engaging the circumference of thesupport hole 19 on the surface of theblade 16 away from theinner bottom surface 15a. - The
blade 16 is fitted into thenotch 15 so as to be put on theinner bottom surface 15a. Then each supportingprojection 18 is inserted into each of thesupport holes 19 formed in theblade 16, and thehead portion 18a is engaged with theblade 16 so that theblade 16 is supported in thenotch 15. Thesupport projections 18 are integrally formed on theblade mounting portions 13a in the present embodiment. However, so long as the strength of theblade mounting portion 13a is assured, the supportingprojections 18 may be formed separately and attached to theinner bottom surface 15a of thenotch 16. Moreover, though theblade mounting portions 13a and supportingprojections 18 are formed out of synthetic resin in this embodiment, they can be also formed out of other kinds of materials. - A
blade edge 16a of heblade 16 is on a plane including aninner edge 13b of theblade mounting portion 13a, and at the same time, on theplane 101 including thesliding surfaces 17. In other words, each of theblade edges 16a of theblades 16 is on the intersection line of the plane including theinner edge 13b of theblade mounting portion 13a and theplane 101 including thesliding surfaces 17. Aspace 102 is formed between theplane 101, which connects thesliding surfaces 17 with theblade edges 16a of theblades 16, and theblades 16. ln thespace 102, thehead portions 18a of thesupport projections 18 are engaged with theblades 16. - When both the
scissor segments 11 described above are opened or closed, as thesliding surfaces 17 of both theblade portions 13 are being slided on each other, an object is cut by theblade edges 16a of both theblades 16. During the cutting operation, since thespace 102 is formed between theblades 16 and theplane 101 including thesliding surfaces 17, and since thehead portions 18a of the supportingprojections 18 supporting theblades 16 are within thesame space 102, thehead portions 18a of the supportingprojections 18 of onescissor segment 11 do not hit and interfere with thesliding surface 17 of theother scissor segment 11. As a result, the open/close movement of both thescissor segments 11 is not interfered. - Furthermore, the
blades 6 are attached to thenotches 15 using no screws but the supportingprojections 18. Namely, concave portions reducing the strength of theblade mounting portions 13a are omitted from the sameblade mounting portions 13a. Therefore, there arises no problem in strength if theblade mounting portions 13a of theblades 13 are formed out of synthetic resin, and the forming of theblade mounting portions 13a out of synthetic resin is realized. - In order to make the
space 102, it is proposed that theblades 16 themselves are processed, such that the opposite inner surfaces of theblades 16 are inclined toward theplane 101 including thesliding surfaces 17. However, in the present embodiment, theinner bottom surfaces 15a of thenotches 15 are inclined toward theplane 101 including thesliding surfaces 17 and theblades 16 are set on the sameinner bottom surfaces 15a so that theblades 16 are automatically inclined toward theplane 101 and the space l02 is made. Therefore, there is no necessity of special processing of theblades 16 for making thespace 102. - Furthermore, the structure for mounting the
blades 16 according to the present embodiment can naturally be applied to shears or bow scissors. - As many apparently widely different embodiments of this invention may be made without departing from the spirit and scope thereof, it is to be understood that he invention is not limited to the specific embodiments thereof except as defined in the appended claims.
Claims (4)
1. A structure for mounting a blade (16) with a blade edge (16a) to a first side of a blade mounting portion (13a) having a sliding surface (17) on a second side, said first side being continuous with said second side,
characterized by;
a notch (15) formed in said second side of said blade mounting portion (13a), and having a surface (15a) inclined toward said sliding surface (l7), said blade (16) being set on said inclined surface (15a), said blade edge (16a) being on a plane (101) including said sliding surface (17), said plane (101) and said blade (16) defining a space (102) therebetween; and
supporting means (18) for supporting said blade (16), provided on said inclined surface (17) and situated within said space (102).
characterized by;
a notch (15) formed in said second side of said blade mounting portion (13a), and having a surface (15a) inclined toward said sliding surface (l7), said blade (16) being set on said inclined surface (15a), said blade edge (16a) being on a plane (101) including said sliding surface (17), said plane (101) and said blade (16) defining a space (102) therebetween; and
supporting means (18) for supporting said blade (16), provided on said inclined surface (17) and situated within said space (102).
2. A structure for mounting a blade according to claim 1, wherein said supporting means comprises a projection (18) integrally formed on said blade mounting portion (13a), so as to project from said inclined surface (15a) in said notch (15) and having a portion (18a) engaging said blade (16).
3. A structure for mounting a blade according to claim 2, wherein said blade mounting portion (13a) and said projection (18) are formed of synthetic resin.
4. A structure for mounting a blade (16) with a blade edge (16a) and a hole (19) to a first side of a blade mounting portion (13a) having a sliding surface (17) on a second side, said first side being continuous with said second side,
characterized by;
a notch (15) formed in said second side of said blade mounting portion (13a) and having a having supporting surface (15a) inclined toward said sliding surface (17), said blade (16) being set on said supporting surface (15a), said blade edges (16a) being on a plane (101) including said sliding surface (17), said plane (101) and said blade (16) defining a space (102) therebetween; and
a plurality of supporting projections (18) integrally formed on said blade mounting portion (13a) so as to project from said supporting surface (15a) in said notch (15), each supporting projection (18) including a stem portion (18b) of smaller diameter inserted into said hole (19) of said blade (16) and a head portion (18a) of larger diameter provided on a tip of said stem portion (18b), said head portion (18a) engaging a circumference of said hole (19) on a surface of said blade (16) away from said supporting surface (15a), said supporting projection (18) and said blade mounting portion (13a) being formed of synthetic resin, said head portion (18a) of said supporting projection (18) being situated within said space (102).
characterized by;
a notch (15) formed in said second side of said blade mounting portion (13a) and having a having supporting surface (15a) inclined toward said sliding surface (17), said blade (16) being set on said supporting surface (15a), said blade edges (16a) being on a plane (101) including said sliding surface (17), said plane (101) and said blade (16) defining a space (102) therebetween; and
a plurality of supporting projections (18) integrally formed on said blade mounting portion (13a) so as to project from said supporting surface (15a) in said notch (15), each supporting projection (18) including a stem portion (18b) of smaller diameter inserted into said hole (19) of said blade (16) and a head portion (18a) of larger diameter provided on a tip of said stem portion (18b), said head portion (18a) engaging a circumference of said hole (19) on a surface of said blade (16) away from said supporting surface (15a), said supporting projection (18) and said blade mounting portion (13a) being formed of synthetic resin, said head portion (18a) of said supporting projection (18) being situated within said space (102).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP146788U JPH01108272U (en) | 1988-01-09 | 1988-01-09 | |
JP1467/88 | 1988-01-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0324379A1 true EP0324379A1 (en) | 1989-07-19 |
Family
ID=11502267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89100163A Withdrawn EP0324379A1 (en) | 1988-01-09 | 1989-01-05 | Structure for mounting blades in scissors |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0324379A1 (en) |
JP (1) | JPH01108272U (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1956588A (en) * | 1932-03-04 | 1934-05-01 | Bard Parker Company Inc | Scissors |
GB627080A (en) * | 1947-08-06 | 1949-07-27 | Paul Richartz | Improvements in or relating to scissors |
GB999624A (en) * | 1963-06-27 | 1965-07-28 | Glenullen George Victor Thomps | Improvements in and relating to scissors or the like |
GB1597745A (en) * | 1977-09-27 | 1981-09-09 | Marin S | Scissors or shears |
-
1988
- 1988-01-09 JP JP146788U patent/JPH01108272U/ja active Pending
-
1989
- 1989-01-05 EP EP89100163A patent/EP0324379A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1956588A (en) * | 1932-03-04 | 1934-05-01 | Bard Parker Company Inc | Scissors |
GB627080A (en) * | 1947-08-06 | 1949-07-27 | Paul Richartz | Improvements in or relating to scissors |
GB999624A (en) * | 1963-06-27 | 1965-07-28 | Glenullen George Victor Thomps | Improvements in and relating to scissors or the like |
GB1597745A (en) * | 1977-09-27 | 1981-09-09 | Marin S | Scissors or shears |
Also Published As
Publication number | Publication date |
---|---|
JPH01108272U (en) | 1989-07-21 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB IT |
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17P | Request for examination filed |
Effective date: 19890817 |
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17Q | First examination report despatched |
Effective date: 19900322 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 19910925 |