EP0501883B1 - Screwdriver with flat blade and retractable guiding device - Google Patents
Screwdriver with flat blade and retractable guiding device Download PDFInfo
- Publication number
- EP0501883B1 EP0501883B1 EP92400497A EP92400497A EP0501883B1 EP 0501883 B1 EP0501883 B1 EP 0501883B1 EP 92400497 A EP92400497 A EP 92400497A EP 92400497 A EP92400497 A EP 92400497A EP 0501883 B1 EP0501883 B1 EP 0501883B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- ring
- screwdriver
- guide
- handle
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/005—Screw guiding means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/02—Arrangements for handling screws or nuts
- B25B23/08—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation
- B25B23/10—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means
- B25B23/101—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means for hand-driven screw-drivers
Definitions
- the present invention relates to a flathead screwdriver, see the preamble of claim 1 (CH-A-243 414).
- a screwdriver for screwing or unscrewing
- the risk of slipping of the flat head previously engaged in the screw is present. This will then require the reintroduction of the flat head into the slot, provided for this purpose on the top of the screw. Any slipping of the flat head could also cause injury to the user.
- the object of the present invention is to prevent any possible sliding of the flat head and therefore any possibility of injury.
- the removable handle 1 of the screwdriver will be molded plastic which will facilitate its manufacture.
- the screwing head may adopt a cruciform shape or any other shape.
- the retractable guide mechanism consists of a guide tubular 6 slidably mounted on the blade, by a ring 3 mounted on the blade with spacing from the tubular guide and by an elastic member 4 such as a spring with non-contiguous turns mounted in low compression around the blade, between the tubular guide and the ring 3. This elastic member is supported both on the ring 3 and on the tubular guide 6. The ring 3 maintains the spring in position.
- the tubular guide 6 is for example of cylindrical shape.
- This tubular guide comprises a cylindrical envelope comprising in the upper part a transverse wall pierced right through according to its thickness of an orifice in which the blade 2 freely engages, the diameter of the blade being less than the diameter of the orifice.
- This arrangement will give the retractable guide a certain freedom of movement between the stop 5 and the ring 3.
- the diameter of the casing is greater than that of the stop 5 and the width of the screw head.
- the diameter of the orifice made in the transverse wall of the envelope is less than that of the stop 5.
- transverse wall forms in the envelope a shoulder 9 by which the tubular guide, under the effect of the thrust exerted by the spring 4, will come to bear against the stop 5.
- the internal height of the casing is greater than the height of the screwing head measured between its lower end and the bearing face, of the guide, of the stopper 5.
- the internal diameter of the casing is slightly greater than that of the head of the screw.
- the guide when it is in abutment against the stop 5 comes around the screwing head and around the screw which axially maintains the screwdriver relative to the screw and prevents any lateral sliding of the screwing head 7 relative to the head of the screw.
- the tubular guide may be made of light alloy but preferably it will be made of a material transparent to light which allows the vision of the screwing head for its engagement in the slot of the screw.
- the ring 3 is made of synthetic material and is pierced axially right through by an orifice through which it engages by sliding with friction on the blade 2.
- the intensity of the friction forces between the ring 3 and the blade 2 are greater than the intensity of the thrust force exerted by the elastic member 4 on the said ring and whatever the degree of compression of this organ.
- the intensity of the thrust forces exerted by the elastic member is sufficient to keep the tubular guide in abutment against the stop 5 but insufficient to move the ring 3 along the blade 2.
- the ring 3 can be moved along the rod by the user to adjust the degree of compression of the elastic member 4.
- the elastic member 4 is fixed by its two ends to the tubular guide 6 and to the ring 3.
- the elastic member 4 By its corresponding end may be engaged in a radial drilling made in the said ring.
- the elastic member can be engaged around a conical shape practiced axially at the end of said guide. This conical shape will flare ves the handle 1.
- the manipulation of the screwdriver with retractable anti-detachment guide does not differ from that of a usual screwdriver but facilitates the screwing or unscrewing of the difficult to access screws and especially prevents the screwing head 7 from slipping off the screw.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Basic Packing Technique (AREA)
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Abstract
Description
La présente invention concerne un tournevis à tête plate, voir le préambule de la revendication 1 (CH-A-243 414).
Lors de l'usage d'un tournevis pour le vissage ou le dévissage, le risque de glissement de la tête plate préalablement engagée dans la vis est présent.
Ceci nécessitera alors la réintroduction de la tête plate dans la fente, prévu à cet effet sur le dessus de la vis.
Le glissement éventuel de la tête plate pourrait également provoquer une blessure à l'utilisateur.The present invention relates to a flathead screwdriver, see the preamble of claim 1 (CH-A-243 414).
When using a screwdriver for screwing or unscrewing, the risk of slipping of the flat head previously engaged in the screw is present.
This will then require the reintroduction of the flat head into the slot, provided for this purpose on the top of the screw.
Any slipping of the flat head could also cause injury to the user.
Pour ces raisons, le but de la présente invention consiste à empêcher tout glissement éventuel de la tête plate et par conséquent, toute possibilité de blessure.For these reasons, the object of the present invention is to prevent any possible sliding of the flat head and therefore any possibility of injury.
A cet effet le tournevis selon l'invention ayant un manche, une lame autour de laquelle est monté un guide tubulaire comportant un épaulement interne orienté vers la tête de vissage et amené en pression contre une butée opposé à celui-ci de la lame par l'effet de la poussée exercée par un organe élastique monté en compression autour de la lame entre le dit guide et une bague montée sur la lame caractérisé en ce que:
- la dite bague, percée axialement de part en part et réalisée en matière synthétique, est montée à coulissement avec friction sur la lame par son orifice, l'intensité des forces de friction entre la bague et la lame étant supérieure à l'intensité de l'effort de poussée exercé par l'organe élastique sur la dite bague,
- l'organe élastique est fixé par une de ses extrémités au guide tubulaire et par son autre extrémité à la bague, de façon que par déplacement de la bague le long de la lame en direction du manche, le guide tubulaire tiré par la bague et par l'organe élastique soit dégagé de la tête de la lame du tournevis, on obtient instantanément un tournevis courant pour d'autres travaux.
- said ring, pierced axially right through and made of synthetic material, is slidably mounted with friction on the blade by its orifice, the intensity of the friction forces between the ring and the blade being greater than the intensity of l 'thrust force exerted by the elastic member on said ring,
- the elastic member is fixed by one of its ends to the tubular guide and by its other end to the ring, so that by displacement of the ring along the blade in the direction of the handle, the tubular guide pulled by the ring and by the elastic member is released from the head of the blade of the screwdriver, you instantly get a common screwdriver for other work.
La présente invention sera mieux comprise à la lecture de la description qui suit et qui est accompagnée par des dessins dans lesquels :
- la figure 1 représente le tournevis à guide rétractable en position de travail,
- la figure 2 représente le tournevis à guide rétractable en position de tournevis usuel.
- FIG. 1 shows the screwdriver with retractable guide in the working position,
- 2 shows the screwdriver with retractable guide in the usual screwdriver position.
Le tournevis selon l'invention à guide rétractable, anti-décrochement est constitué de trois parties distinctes :
- un manche 1 qui peut être amovible,
- une
lame 2 en acier avec tête devissage 7 la dite lame peut être fixée de manière amovible au manche 1, - un mécanisme de guide rétractable 8 monté autour de la
lame 2.
- a handle 1 which can be removable,
- a
steel blade 2 withscrew head 7 said blade can be removably attached to the handle 1, - a
retractable guide mechanism 8 mounted around theblade 2.
Le fait que la lame et le manche soient séparables l'un de l'autre autorise le remplacement du mécanisme de guide rétractable ou son retrait, ou bien le remplacement du manche et /ou de la lame.The fact that the blade and the handle are separable from each other allows the replacement of the retractable guide mechanism or its removal, or the replacement of the handle and / or the blade.
Le retrait du mécanisme de guide rétractable permettra de convertir le tournevis selon l'invention en tournevis usuel.The removal of the retractable guide mechanism will convert the screwdriver according to the invention into the usual screwdriver.
Le manche amovible 1 du tournevis sera en plastique moulé ce qui facilitera sa fabrication.The removable handle 1 of the screwdriver will be molded plastic which will facilitate its manufacture.
A titre d'exemple est représentée une lame avec tête de vissage plate mais il va de soi que la tête de vissage pourra adopter une forme cruciforme ou toute autre forme.By way of example is shown a blade with a flat screwing head, but it goes without saying that the screwing head may adopt a cruciform shape or any other shape.
Au-dessus de la tête de vissage 7 la lame 2 présente une butée 5 cylindrique usinée dans sa masse ou bien rapportée destinée à retenir le mécanisme de guide rétractable près de la tête de vissage 7. Cette butée 5 s'oppose à l'extraction du mécanisme de guide rétractable de la lame 2.
Le mécanisme de guide rétractable est constitué par un guide tubulaire 6 monté en coulissement sur la lame, par une bague 3 montée sur la lame à écartement du guide tubulaire et par un organe élastique 4 tel un ressort à spires non jointives monté en compression faible autour de la lame, entre le guide tubulaire et la bague 3. Cet organe élastique prend appui tant sur la bague 3 que sur le guide tubulaire 6. La bague 3 maintient le ressort en position.Above the
The retractable guide mechanism consists of a guide tubular 6 slidably mounted on the blade, by a
Le guide tubulaire 6 est par exemple de forme cylindrique. Ce guide tubulaire comprend une enveloppe cylindrique comportant en partie supérieure une paroi transversale percée de part en part suivant son épaisseur d'un orifice dans lequel s'engage librement la lame 2, le diamètre de la lame étant inférieur au diamètre de l'orifice.The
Cette disposition laissera au guide rétractable une certaine liberté de mouvement comprise entre la butée 5 et la bague 3.This arrangement will give the retractable guide a certain freedom of movement between the
Le diamètre de l'enveloppe est plus important que celui de la butée 5 et que la largeur de la tête de vissage.The diameter of the casing is greater than that of the
De plus le diamètre de l'orifice pratiqué dans la paroi transversale de l'enveloppe est moins important que celui de la butée 5.In addition, the diameter of the orifice made in the transverse wall of the envelope is less than that of the
On comprend donc que la paroi transversale forme dans l'enveloppe un épaulement 9 par lequel le guide tubulaire, sous l'effet de la poussée exercée par le ressort 4, viendra en appui contre la butée 5.It is therefore understood that the transverse wall forms in the envelope a
La hauteur interne de l'enveloppe est plus importante que la hauteur de la tête de vissage mesurée entre son extrémité inférieure et la face d'appui, du guide, de la butée 5. En outre le diamètre interne de l'enveloppe est légérement supérieur à celui de la tête de la vis.The internal height of the casing is greater than the height of the screwing head measured between its lower end and the bearing face, of the guide, of the
Grâce à ces dispositions le guide lorsqu'il est en appui contre la butée 5 vient autour de la tête de vissage et autour de la vis ce qui maintient axialement le tournevis par rapport à la vis et empêche tout glissement latéral de la tête de vissage 7 par rapport à la tête de la vis.Thanks to these provisions, the guide when it is in abutment against the
Le guide tubulaire pourra être constitué en alliage léger mais préférentiellement il sera constitué en une matière transparente à la lumière ce qui permet la vision de la tête de vissage pour son engagement dans la fente de la vis.The tubular guide may be made of light alloy but preferably it will be made of a material transparent to light which allows the vision of the screwing head for its engagement in the slot of the screw.
La bague 3 est réalisée en matière synthétique et est percée axialement de part en part par un orifice par lequel elle s'engage par coulissement avec friction sur la lame 2.The
Il y a lieu de noter que l'intensité des forces de friction entre la bague 3 et la lame 2 sont supérieures à l'intensité de l'effort de poussée exercée par l'organe élastique 4 sur la dite bague et ce quel que soit le degré de compression de cet organe.It should be noted that the intensity of the friction forces between the
On conçoit que l'intensité des efforts de poussée exercés par l'organe élastique est suffisante pour maintenir le guide tubulaire en appui contre la butée 5 mais insuffisante pour déplacer la bague 3 le long de la lame 2.It will be understood that the intensity of the thrust forces exerted by the elastic member is sufficient to keep the tubular guide in abutment against the
Cependant la bague 3 pourra être déplacée le long de la tige par l'utilisateur pour ajuster le degré de compression de l'organe élastique 4.However, the
Par déplacement de la bague 3 vers le manche du tournevis l'utilisateur pourra dégager de la tête de vissage 7 le guide tubulaire 6.By moving the
Selon une forme avantageuse de réalisaton, l'organe élastique 4 est fixé par ses deux extrémités au guide tubulaire 6 et à la bague 3.According to an advantageous embodiment, the
Cette disposition, par déplacement de la bague 3 vers le manche du tournevis permet d'écarter de la tête 7 de la lame, l'ensemble du mécanisme 8 de guide rétractable (Fig.2).This arrangement, by displacement of the
Pour être fixé à la bague 3 l'organe élastique 4 par son extrémité correspondante pourra être engagé dans un perçage radial pratiqué dans la dite bague.To be fixed to the
Pour être fixé au guide tubulaire l'organe élastique pourra être engagé autour d'une forme conique pratiquée axialement en extrémité du dit guide. Cette forme conique s'évasera ves le manche 1.To be fixed to the tubular guide, the elastic member can be engaged around a conical shape practiced axially at the end of said guide. This conical shape will flare ves the handle 1.
La manipulation du tournevis à guide rétractable anti-décrochement ne diffère pas de celle d'un tournevis usuel mais facilite le vissage ou dévissage des vis difficiles d'accès et évite surtout que la tête de vissage 7 ne dérape de la vis.The manipulation of the screwdriver with retractable anti-detachment guide does not differ from that of a usual screwdriver but facilitates the screwing or unscrewing of the difficult to access screws and especially prevents the
Claims (3)
- A screwdriver possessing a handle (1) and a blade (2) around which a tubular guide (6) is fitted comprising an internal shoulder (9) oriented towards the tip of the screwdriver (7) and which is forced against a stop (5) facing opposite on the blade under the effect of pressure exerted by a spring (4) fitted in a compressed configuration around the blade between said guide and a ring (3) mounted on the blade (2) whereas:- said ring (3), which is bored axially and is made of a synthetic material, is fitted so that it slides along the blade (2) with a certain amount of friction, the strength of the forces of friction between the ring (3) and the blade (2) being greater than the push of the spring (4) against said ring (3),- the spring (4) is attached at one of its ends to the tubular guide (6) and by the other end to the ring (3) so that when the ring slides along the blade towards the handle (1), the tubular guide is pulled by the ring and spring (4) so that it uncovers the tip (7) of the screwdriver blade (2) and a traditional screwdriver is obtained for other work.
- Screwdriver as per claim 1 whereas the handle (1) is not removable.
- Screwdriver as per claim 1 whereas the tubular guide is made of a transparent material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9102773A FR2673392B1 (en) | 1991-03-01 | 1991-03-01 | SCREWDRIVER WITH FLAT HEAD AND RETRACTABLE GUIDE. |
| FR9102773 | 1991-03-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0501883A1 EP0501883A1 (en) | 1992-09-02 |
| EP0501883B1 true EP0501883B1 (en) | 1996-07-10 |
Family
ID=9410477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92400497A Expired - Lifetime EP0501883B1 (en) | 1991-03-01 | 1992-02-26 | Screwdriver with flat blade and retractable guiding device |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0501883B1 (en) |
| AT (1) | ATE140177T1 (en) |
| DE (1) | DE69212018D1 (en) |
| FR (1) | FR2673392B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9223045D0 (en) * | 1992-11-04 | 1992-12-16 | Betts Geoffrey | Screwdrivers |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1071007B (en) * | 1959-12-10 | Kassel Curt Starck | Screwdriver with spring-loaded gripping, holding and guide sleeve | |
| CH243414A (en) * | 1945-02-15 | 1946-07-15 | Zimmerli Adolf | Device on screwdrivers. |
| GB733857A (en) * | 1951-11-17 | 1955-07-20 | Cheney & Son Ltd C | Improvements in screwdrivers |
| US3288185A (en) * | 1965-01-15 | 1966-11-29 | Wade Stevenson | Screwdriver construction |
| US3604488A (en) * | 1969-11-19 | 1971-09-14 | Vermont American Corp | Screwdriver attachment |
| DE2020904A1 (en) * | 1970-04-29 | 1971-11-18 | Armin Ruettinger | Guide device for screwdriver |
| GB2073638A (en) * | 1980-03-11 | 1981-10-21 | Hughes G | Screwdrivers |
| DE3622199A1 (en) * | 1986-07-02 | 1988-01-07 | Georg Unger | Special screwdriver |
| US4800788A (en) * | 1987-04-04 | 1989-01-31 | Innovative Computer Tools, Inc. | Non-slip screwdriver |
-
1991
- 1991-03-01 FR FR9102773A patent/FR2673392B1/en not_active Expired - Fee Related
-
1992
- 1992-02-26 EP EP92400497A patent/EP0501883B1/en not_active Expired - Lifetime
- 1992-02-26 DE DE69212018T patent/DE69212018D1/en not_active Expired - Lifetime
- 1992-02-26 AT AT92400497T patent/ATE140177T1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| EP0501883A1 (en) | 1992-09-02 |
| FR2673392B1 (en) | 1995-06-02 |
| ATE140177T1 (en) | 1996-07-15 |
| DE69212018D1 (en) | 1996-08-14 |
| FR2673392A1 (en) | 1992-09-04 |
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