EP2623266B1 - Manche pour un tournevis à cliqué électriquement isolé et tournevis avec un tel manche avec tige échangeable - Google Patents

Manche pour un tournevis à cliqué électriquement isolé et tournevis avec un tel manche avec tige échangeable Download PDF

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Publication number
EP2623266B1
EP2623266B1 EP20120382040 EP12382040A EP2623266B1 EP 2623266 B1 EP2623266 B1 EP 2623266B1 EP 20120382040 EP20120382040 EP 20120382040 EP 12382040 A EP12382040 A EP 12382040A EP 2623266 B1 EP2623266 B1 EP 2623266B1
Authority
EP
European Patent Office
Prior art keywords
handle
axial
handle body
pushing
sleeve
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.)
Active
Application number
EP20120382040
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German (de)
English (en)
Other versions
EP2623266A1 (fr
Inventor
John Uranga Elorza
Egoitz Aranberri Aresti
Xabier Arrizabalaga Iraegi
Asier Saez De Castillo Apodaca
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SNA Europe Industries Iberia SA
Original Assignee
SNA Europe Industries Iberia SA
Priority date (The priority date 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 date listed.)
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Publication date
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Priority to EP20120382040 priority Critical patent/EP2623266B1/fr
Priority to ES12382040T priority patent/ES2531001T3/es
Publication of EP2623266A1 publication Critical patent/EP2623266A1/fr
Application granted granted Critical
Publication of EP2623266B1 publication Critical patent/EP2623266B1/fr
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Anticipated expiration legal-status Critical

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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
    • B25B15/00—Screwdrivers
    • B25B15/02—Screwdrivers operated by rotating the handle
    • B25B15/04—Screwdrivers operated by rotating the handle with ratchet action
    • 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
    • B25B23/0007—Connections or joints between tool parts
    • B25B23/0042—Connection means between screwdriver handle and screwdriver shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G1/00—Handle constructions
    • B25G1/10—Handle constructions characterised by material or shape
    • B25G1/12—Handle constructions characterised by material or shape electrically insulating material
    • B25G1/125—Handle constructions characterised by material or shape electrically insulating material for screwdrivers, wrenches or spanners

Definitions

  • the present invention lies within the technical field of hand-operated tools and particularly within that of electrically insulated screwdrivers with ratchet mechanisms.
  • Ratcheting screwdrivers are well known in the art. They are useful to provide driving rotation of the handle and axial shaft in one direction for fastening or loosening an element such like a screw whilst allowing non-driven rotation of the handle into the opposite direction.
  • screwdrivers with interchangeable axial shafts comprising a handle with retaining means for holding a rearward portion of the axial shaft in an inner longitudinal hole in the handle.
  • a ratcheting screwdriver with exchangeable bits is disclosed, for example, in US-7287448-B2 .
  • the therein described screwdriver comprises a handle body having a first end, a second end and an inner axial blind hollow extending from the first end towards the second end of the handle body, and a first opening in the first end communicating with the axial hollow, and a sleeve member fixedly fitted within the axial blind hollow,
  • the sleeve member comprises a first end portion with an insertion opening of an axial inner passage for accommodating the rearward portion of the axial shaft, a second end portion and an outer wall surface, and a ratchet mechanism comprising a toothed sleeve, at least one pawl member engaging the toothed sleeve and a switch member mounted at a first handle end portion.
  • the ratcheting mechanism comprises a toothed sleeve, a first pawl member and a second pawl member positioned in a receiving section in an axial inner passage in the sleeve member, and connected to each other by a connecting spring for biasing the pawl members away from each other, and a cap-shaped switch member.
  • the switch member is pivotable between a first end position, a second end position and an intermediate position and comprises actuator rods extending into the receiving portion at opposite sides.
  • a second actuator rod pushes the second pawl member away from the outer wall surface of the toothed sleeve so that a toothed side of the second pawl member becomes disengaged from the toothed sleeve whilst the first pawl member becomes restrained between a lateral wall of the receiving portion and the outer surface of the toothed sleeve so that its toothed side engages with the toothed sleeve, so that the ratcheting mechanism allows clockwise driving rotation for driving a screw or other element, and counterclockwise free rotation in which the screw or other element is not driven.
  • the actuator rods are distanced from the pawl members so that the toothed sides of both of them engage with the toothed sleeve, so that driving rotation is allowed clockwise and counterclockwise.
  • the first actuator rod pushes the first pawl member way from the outer wall surface of the toothed sleeve -6- so that the toothed side of the first pawl member becomes disengaged from the toothed sleeve whilst the second pawl member becomes restrained between the opposite lateral wall of the receiving portion and the outer surface of the toothed sleeve so that its toothed side engages with the toothed sleeve, so that, in said second portion, the ratcheting mechanism allows counterclockwise driving rotation for loosening a screw or other element, and clockwise free rotation in which the screw or other element is not moved.
  • the present invention is intended to overcome the above mentioned drawbacks of prior art by providing a handle for an electrically insulated ratcheting screwdriver and a screwdriver with interchangeable axial shafts comprising the handle.
  • the handle is capable of releasably holding an axial shaft having a tip and a rear end portion, a forward portion extending from the tip towards the rear end portion, a rearward portion extending from the rear end portion towards the tip and insertable into the handle, an anti-rotating portion of the rearward portion, and an annular notch between the antirotating portion and the rear end portion.
  • This handle comprises a handle body made of a first electrically insulating material having a first end, a second end and an inner axial hollow extending from the first end towards the second end of the handle body, and a first opening in the first end communicating with the axial hollow, a sleeve member fixedly fitted within the axial hollow, the sleeve member comprising a first end portion with an insertion opening of an axial inner passage for accommodating the rearward portion of the axial shaft, a second end portion and an outer wall surface, and a ratchet mechanism comprising a toothed sleeve, at least one pawl member engaging the toothed sleeve and a switch member mounted to a first handle end portion, wherein the handle comprises pushbutton-operated retaining means for releasably retaining the rearward portion within the axial passage of the sleeve member and releasing the rearward portion by actuating a pushbutton located a second handle end portion; the outer wall surface of the s
  • the outer wall surface of the sleeve member comprises a plurality of annular channels, each filled with a filling portion of the elastomeric material of the jacket, each filling portion connected to the enveloping portion by connecting portions of the elastomeric material extending through a plurality of radial throughholes in the handle body.
  • the handle body may further comprise an outer surface with plurality of protrusions that at least penetrate into or, preferably, through adjacent portions of the elastomeric material of the enveloping portion of the jacket.
  • the second end of the handle body comprises a second opening communicating with said inner axial hollow;
  • the second end portion of said axial inner passage of the sleeve member comprises with a second opening located axially opposite to said first end portion;
  • the retaining means comprise a claw member comprising a transversely positioned base member connected to elastically tiltable legs, for example at least two equidistant tiltable legs, extending into said inner passage, each tiltable leg comprising a free end with a thickening for releasably engaging said annular notch in said rearward portion when accommodated in said inner passage in a locked position;
  • the base member is fixed to the second end portion in a position where it is axially adjacent to the rear end portion when the rearward portion is in said locked position;
  • the tiltable legs are positioned radially in the axial inner passage such that they are able to move radially between a first position where said thickenings are radially closest to each other and a second position where said thick
  • the axial inner passage of the sleeve member comprises an intermediate stepped portion located between said first end portion and said second end portion, the intermediate portion having a smaller diameter than said end portions and axially dividing the axial inner passage into a first chamber comprising said receiving section and housing the toothed sleeve, and a second chamber housing the claw member.
  • Each thickening may comprise a distal sliding ramp which is inwardly inclined towards said second end of the handle body, to contribute to allowing the rear end portion to separate the thickenings from each other when the rearward portion is inserted into the handle towards said locked position.
  • the switch member may be rotationally mounted to the first end of the sleeve member by means of a mounting arrangement.
  • a mounting arrangement it comprises at least two radial tabs emerging from opposed of an outer wall portion closely to the first end portion of the sleeve member and guided radially in respective horizontal guiding slots provided in an inner portion of a axial skirt of the switch member which surrounds said outer wall portion of the sleeve member.
  • a second embodiment of the mounting arrangement comprises respective pairs of radial tabs emerging from opposed portions of an outer wall closely to the first end portion of the sleeve member and guided radially in respective horizontal guiding slots provided in an inner surface of a skirt of the switch member which surrounds said outer wall portion of the sleeve member.
  • it comprises at least two radial tabs emerging equidistantly one to another at opposed portions of an outer wall closely to the first end portion of the sleeve element and radially guided in one single horizontal slot in an inner wall of the skirt of the switch member which surrounds said outer wall portion of the sleeve member.
  • the tiltable legs are made of an elastic material
  • the base member of the claw member comprises a central hole which is axially aligned with said pusher rod member, and the pusher rod member is guided in the central hole at least when moving towards said acting position.
  • Each thickening comprises a proximal sliding ramp inwardly inclined towards the first end of the handle body, to contribute to allowing separation of the thickenings from each other to disengage from said annular notch in the rearward portion, by a radial edge portion of the pushing member sliding on the proximal sliding ramps when the pusher rod member is pushed towards the first end of the handle body.
  • said pushing member is tubular and comprises an axial bore for inserting the rear end portion, such that the axial bore houses the rear end portion when the rearward portion is inserted in the handle, and the radial edge portion is a terminal edge of a perimetral wall surrounding the axial bore.
  • each tiltable leg comprises a first leg portion comprising said thickening and extending into the axial inner passage of the sleeve member towards said first end of the handle body, and a second leg portion extending towards said second end of the handle body, and a connecting leg portion located between the first and second leg portions, the connecting leg portion is tiltably connected to a peripheral portion of the base member of the claw member; each second leg portion is guided in a longitudinal recess in the axial hollow of the handle body; the tiltable legs are connected to the peripheral portion of the base member such that, when the pusher rod member is moved towards said acting position, said peripheral inner edges force the thickened end portions of the tiltable legs to approach each other so that the tiltable legs pivot about the connecting leg portions to move the first leg portions from said first to said second position; the connecting leg portions are elastically connected to the base member such that the tiltable legs elastically recover their first position.
  • each of the thickened end portions may comprise an inwardly inclined contact surface facing said inner peripheral edge of the pushing leg, and the spring member is radially surrounded by a plurality of fixing legs provided with respective fixing ends fixed to the axial inner passage of the sleeve element, and arranged axially between a seat provided at the pusher rod member and a transverse plate mounted in the second end opening of the sleeve element between the pushing legs.
  • FIGS 1 to 4 are external views of an embodiment of an electrically insulated ratcheting screwdriver according to the present invention.
  • the screwdriver comprises a handle -1-capable of releasably holding an axial shaft -2- having a tip -2a- and a rear end portion -2b-, a forward portion -2c- extending from the tip -2a- towards the rear end portion -2b-, a rearward portion -2d- extending from the rear end portion -2b- towards the tip -2a- and insertable into the handle,
  • the blade-2- further comprises an anti-rotating portion -2e- of the rearward portion -2d- , and an annular notch -2f-between the antirotating portion -2e- and the rear end portion -2b-.
  • the handle -1- comprises a handle body -3- made of a first electrically insulating material having first end -3a-, a second end -3b- and an inner axial hollow -3c- extending from the first end -3a- towards the second end -3b- of the handle body -3-, and a first opening -3d- in the first end -3a- communicating with the axial hollow -3c-.
  • the axial hollow -3c- comprises a first hollow section -3h-, second hollow section -3i- and an intermediate hollow section -3j-.
  • the second opening -3g- has a larger diameter than the first hollow section -3h-, and the first and second hollow sections -3h, 3i- each have a larger diameter that the intermediate hollow section -3j-.
  • the intermediate hollow section -3j- comprises longitudinal guiding recesses -3k-.
  • a sleeve member -4- is fixedly fitted within the second hollow section -3i- of the axial hollow -3c-.
  • the sleeve member -4- comprises a first end portion -4a- with an insertion opening -4b- communicating with a receiving section -4d- of an axial inner passage -4c- for accommodating the rearward portion -2d-, a second end portion -4e- and an outer wall surface -4f-.
  • the handle -1- further comprises retaining means for releasably retaining the rearward portion -2c- within the axial passage -4c- of the sleeve member -4- and a ratchet mechanism comprising a toothed sleeve -6- and at least one pawl member -8-.
  • the outer wall surface -4f- of the sleeve member -4- comprises two annular channels -4g, 4h-, whilst the handle body -3- comprises radial throughholes -3e-communicating with the annular channel -4g, 4h- and is radially wrapped by a jacket -10- of elastomeric material injected over the handle body -3-, each filled with a filling portion -10b- of the elastomeric material of the jacket -10-, each filling portion -10b-connected to the enveloping portion -10a- by connecting portions -10c- of the elastomeric material extending through a plurality of radial throughholes -3e- in the handle body -3-.
  • the outer surface of the handle body -3- has a plurality of protrusions -3f- that penetrate through adjacent portions -10d- of the elastomeric material of the enveloping portion -10a- of the jacket -10- and flush with the surface of the enveloping portion -10a- of the jacket -10-.
  • the elastomeric material penetrates through the throughholes -3e- into the annular channels -4g, 4h- so that, after cooling, the enveloping portion -10a- and the filling portions -10b- in the annular channels -4g, 4h- remain connected by the connecting portions -10c-extending through the throughholes -3e-, such that the sleeve member -4- is fixedly positioned in the handle body -3-.
  • the protrusions -3f- penetrating through the enveloping portion -10a- of the jacket -10- contribute to securing the jacket on the outer surface of the handle body -3-, especially to prevent slipping of the jacket -10- on said outer surface.
  • some of the protrusions are simple knobs whilst others are shaped as arrows, numbers and letters and logos which are visible to the user.
  • the outer surface of the handle body -3- further comprises a recessed elongate plate portion -3h-, whilst the jacket -10 comprises a complementarily-shaped lateral window -10e- in the enveloping portion -10a- of the jacket -10-.
  • the plate portion -3h- improves the gripping quality of the handle -1- and may additionally be used for putting thereon inscriptions such as, for example, a trademark or type name of the screwdriver, and/or symbols such as, for example, logos.
  • the ratcheting mechanism is of the type disclosed in US-7287448-B2 and comprises a toothed sleeve -6-, a first pawl members -8- and a second pawl member-8'- connected to each other by an elastic member i.e., a connecting spring -8c- for biasing the pawl members -8, 8'- away from each other, and a cap-shaped switch member -9-.
  • the toothed sleeve -6- is rotatably mounted in the inner passage -4c- of the sleeve member -4-, and comprises an outer wall surface -6a- a portion of which is provided with plurality of longitudinal teeth -7-.
  • the teeth -7- radially protrude from the outer wall surface -6a-.
  • the toothed sleeve -6- further comprises a mounting portion -6b- protruding beyond the insertion opening -4b- of the sleeve member -4c-, and a longitudinal bore -6c- shaped to fit with the anti-rotating portion -2e- of the rearward portion -2c-,
  • the pawl members -8, 8'- are mounted in a receiving section -4d- of the sleeve member -4-.
  • the receiving section -4d- is comprised in said insertion opening -4b-, and comprises two converging lateral walls -4m- connected to an arched end wall -4n-.
  • Each pawl member -8, 8'- comprises a toothed side -8a- for releasably engaging the longitudinal teeth -7- of the toothed sleeve -6-.
  • the pawl members -8, 8'- are positioned in the receiving section -4d- between the end wall -4n- and the teeth -7- on the outer wall surface -6a- of the toothed sleeve -6-.
  • the switch member -9- is made of a another electrically insulating material and comprises a head wall -9a- and a peripheral axial skirt -9b- by which the switch member -9- is pivotally mounted to the first end portion -4a- of the sleeve member -4-.
  • the head wall -9a- and the axial skirt -9b- enclose an inner mounting space -9c-.
  • the head wall -9a- comprises a central bore -9d- for inserting the axial shaft -2-, and a first and a second axial actuator rod -9e, 9e'- located in positions where they protrude into the receiving section -4d- of the sleeve member -4- respectively between one lateral wall -4m- and the outer wall surface -6a- of the toothed sleeve -6- and where each actuator rod -9e, 9e'- faces one of the pawl members -8, 8'-.
  • the switch member -9- is pivotable between a first end position, a second end position (not shown in the figures) and an intermediate position shown in figure 11 .
  • the second actuator rod -9e'- pushes the second pawl member -8'- away from the outer wall surface -6a- of the toothed sleeve -6- so that the toothed side -8a'- of the second pawl member -8'- becomes disengaged from the longitudinal teeth -7- whilst the first pawl member -8- becomes restrained between the lateral wall -4m- and the outer surface -6a- of the toothed sleeve -6- so that its toothed side -8a- engages with the longitudinal teeth -7- of the toothed sleeve -6-.
  • the ratcheting mechanism allows clockwise driving rotation for driving a screw or other element, and counterclockwise free rotation in which the screw or other element is not driven.
  • the actuator rods -9, 9'- are distanced from the pawl members -8. 8'- so that the toothed sides -8a, 8a'- of both of them engage with the teeth -7- of the toothed sleeve -6-, so that driving rotation is allowed clockwise and counterclockwise.
  • the first actuator rod -9e- pushes the first pawl member -8- away from the outer wall surface -6a- of the toothed sleeve -6- so that the toothed side -8a- of the first pawl member -8- becomes disengaged from the longitudinal teeth -7- whilst the second pawl member -8'- becomes restrained between the lateral wall -4m- and the outer surface -6a- of the toothed sleeve -6- , so that its toothed side -8a'- engages with the longitudinal teeth -7- of the toothed sleeve -6-.
  • the ratcheting mechanism allows counterclockwise driving rotation for loosening a screw or other element, and clockwise free rotation in which the screw or other element is not moved.
  • the switch member -9- is releasably held in the afore mentioned positions by positioning means comprising a first, second and a third axial retaining groove -9f, 9f, 9f"- in the inner surface of the skirt -9b- of the switch member -9-, a radial blind bore -4o- in the outer wall surface -4f- of the sleeve member -4-, and a ball -14- and a spring -15- positioned in the axial bore -4o- such that the spring -15- exerts a pushing force.
  • the blind bore -4o- is located such that when the switch member -9- is pivoted, a portion of the ball -14- is pressed by the spring -15- into one of the retaining grooves -9f, 9f, 9f'-.
  • the ball -14- is pressed against the pushing force of the spring 15- into the blind bore -4o- until it faces another of the retaining recesses -9f, 9f, 9f'- into which a portion of the ball -14- is then pressed by action of the spring -15-.
  • the switch member -9- is not enveloped by the jacket -10-, and the outer surface of its axial skirt -9b- is provided with longitudinal gripping recesses -9g- to enhance pivoting of the switch member -9-.
  • the second end of the handle body -3- comprises a second opening -3g- communicating with said inner axial hollow -3c-
  • the second end portion -4e- of said axial inner passage -4c- of the sleeve member -4- comprises with a second opening -4i- located axially opposite to said first end portion -4-
  • the retaining means comprise a claw member -5- comprising a transversely positioned base member -5a- connected elastically to a plurality of tiltable legs -11- extending into said inner passage -4c-, each tiltable leg -11-comprising a free end with a thickening -11a- for releasably engaging said annular notch -2f- in said rearward portion -2e- of the axial shaft -2- when accommodated in said inner passage -4c- in a locked position.
  • the base member -5a- is fixed to the second end portion -4e- in a position where it is axially adjacent to the rear end portion -2b- of the axial shaft -2- when the rearward portion -2d- of the axial shaft -2- is in said locked position.
  • the tiltable legs -11- are positioned radially in the axial inner passage -4c- such that they are able to move radially between a first position where said thickenings -11a- are radially closest to each other and a second position where said thickenings -11a- are radially distant from each other sufficiently to disengage from said annular notch -2f- of said rearward portion -2d- of the axial shaft -2-.
  • Each thickening -11a- comprises a distal sliding ramp -11b- which is inwardly inclined towards said second end -3b- of the handle body -4-, to contribute to allowing the rear end portion -2b- to separate the thickenings -11 a- from each other when the rearward portion -2d- of the axial shaft -2- is inserted into the handle -1- towards said locked position, as shown in figures 16A-16C .
  • a pusher rod member-12- of an insulating material is axially guided in the axial hollow -3c- of the handle body -3-.
  • the pusher rod member -12- comprises a pushbutton head portion -12a- located in the second opening -3g- of the handle body -3-, and a pushing member in the form of a pushing end -12b- axially opposite to the pushbutton head portion -12a-.
  • the pushbutton head portion -12a- comprises two radial projections -12h- that slidablly fit within corresponding radial recesses -3l-provided in the inner surface of the second opening -3g- of the handle body -3-.
  • the radial recesses -3l- communicate with the first hollow section -3h- of the inner axial hollow -3c- of the handle body -3-.
  • the pushbutton head portion -12a- is thus slidably retained in the second opening -3g- of the handle body -3-.
  • the pusher rod member -12- is axially movable, guided by longitudinal guiding ribs -12i- slidably fitting in the guiding recesses -3k- in the intermediate hollow section -3j-, between a resting position where the pushing end -12b- does not act on the tiltable legs -11- of the claw member -5-, and an acting position, where the pushing end -12b- forces the tiltable legs -11- into said second position.
  • the pusher rod member -12- is held in the resting position by a spring member -13- providing an axial resistance such that, to move the pusher rod member -12- from the resting position towards the acting position, a pushing force greater than the axial resistance of the spring member -13- must be exerted on the pushbutton head portion -12a-.
  • the spring member -13- surrounds the pusher rod member -12- and is positioned within the first hollow section -3h- of the handle body -3- abutting against a peripheral flange -12j- of the pusher rod member -12- located adjacently to the pushbutton head portion -12a-.
  • the axial inner passage -4c- of the sleeve member -4- comprises an intermediate stepped portion -4j - located between said first end portion -4a- and said second end portion -4e-, the intermediate portion -4j- having a smaller diameter than said end portions -4a, 4i- and axially dividing the axial inner passage -4c- into a first chamber -4k- comprising said receiving section -4d- and housing the toothed sleeve -6-, and a second chamber -41- housing the claw member -5-.
  • the base member -5a- of the claw member -5- comprises a central hole -5b- which is axially aligned with said pusher rod member -12-, and the tiltable legs -11- are made of an elastic material.
  • Each thickening -11a- comprises a proximal sliding ramp -11c-inwardly inclined towards the first end -3a- of the handle body -3-, to contribute to allowing separation of the thickenings -11- from each other to disengage from said annular notch -2f- in the rearward portion -2d-, by a radial edge portion -12c, 12e- of the pushing end -12b- sliding on the proximal sliding ramps -11c- when the pusher rod member -12- is pushed towards the first end -3a- of the handle body -3-.
  • the pusher rod member -12- is guided in the central hole -5b- when moving towards said acting position, and its pushing end -12b- is tubular and comprises an axial bore -12d- for inserting the rear end portion -2b- of the axial shaft -2-, such that the axial bore -12d-houses the rear end portion -2b- when the rearward portion -2d- of the axial shaft -2- is inserted in the handle.
  • the radial edge portion is a terminal edge -12c- of a perimetral wall surrounding the axial bore -12d-.
  • the claw member comprises two tiltable legs -11-, and each tiltable leg -11- comprises a first leg portion -11 d- comprising said thickening -11a- and extending through the axial inner passage -4c- of the sleeve member -4- towards the first end -3a- of the handle body -3-, and a second leg portion -11e- extending towards the second end -3b- of the handle body -3-, and a connecting leg portion -11f- located between the first and second leg portions -11d, 11e-.
  • the connecting leg portion -11f- is tiltably connected to a peripheral portion of the base member -5a- of the claw member -5-.
  • An insulating rubber disk -16- is located between the rear end portion -2b- of the axial shaft -2- and the base member -5a- of the claw member -5-.
  • the pusher rod member comprises respective pushing legs -11f- which act on the respective tiltable legs -11-.
  • Each second leg portion -11e- comprises a thickened end portion -11g-arranged in correspondence with a cut -4r- which extends from the second end portion -4e- towards the first end portion -4b- of the sleeve member -4- and which faces an inner peripheral edge -12e- of one of the pushing legs -12f-.
  • Each pushing leg -12f- is guided within the axial inner hollow -3c- of the handle body -3- and joint to the pusher rod member -12-.
  • each of the thickened end portions -11g- comprises an inwardly inclined contact surface -11 h- facing said inner peripheral edge -12e- of the pushing leg -12f-.
  • the spring member -13- is radially surrounded by a plurality of axial fixing legs -12g- provided at respective fixing ends -12m- fixed to the axial inner passage -4c- of the sleeve member -4-, and fixed axially between a seat -12k- provided at the pusher rod member -12- and a transverse plate -4o- mounted in the second end opening -4i-of the sleeve member between the pushing legs -12f-.
  • the tiltable legs -11- are connected to the peripheral portion of the base member -5a- such that, when the pusher rod member -12- is moved towards said acting position, said peripheral inner edge -12e- forces the thickened end portions -11g- to approach each other and to slide on said inner wall surface so that the tiltable legs -11- pivot about the connecting leg portions -11f- to move the first leg portions -11d- from said first to said second position.
  • the connecting leg portions -11f- are elastically connected to the base member -5a- such that the tiltable legs -11- elastically recover their first position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Preventing Unauthorised Actuation Of Valves (AREA)
  • Food-Manufacturing Devices (AREA)

Claims (15)

  1. Manche pour un tournevis à cliquet isolé électriquement, capable de maintenir de façon libérable une tige axiale (2) ayant une pointe (2a) et une partie d'extrémité arrière (2b), une partie avant (2c) s'étendant de la pointe (2a) vers la partie d'extrémité arrière (2b), une partie arrière (2d) s'étendant de la partie d'extrémité arrière (2b) vers la pointe (2a) et insérable dans le manche (1), et une partie anti-rotation (2e) de la partie arrière (2d), et une encoche annulaire (2f) entre la partie anti-rotation (2e) et la partie d'extrémité arrière (2b), le manche (1) comprenant
    un corps de manche (3) constitué d'un premier matériau électriquement isolant ayant une première extrémité (3a), une seconde extrémité (3b) et un creux axial interne (3c) s'étendant de la première extrémité (3a) vers la seconde extrémité (3b) du corps de manche (3), et une première ouverture (3d) dans la première extrémité (3a) en communication avec le creux axial (3c) ;
    un élément formant manchon (4) fixé solidement à l'intérieur du creux axial (3c), l'élément formant manchon (4) comprenant une première partie d'extrémité (4a) avec une ouverture d'insertion (4b) d'un passage interne axial (4c) pour loger la partie arrière (2d) de la tige axiale, une seconde partie d'extrémité (4e) et une surface de paroi externe (4f) ;
    un mécanisme d'encliquetage comprenant un manchon denté (6), au moins un élément formant cliquet (8) et un élément formant interrupteur (9) monté sur une première partie d'extrémité du manche ;
    caractérisé en ce que
    le manche (1) comprend des moyens de maintien actionnés par bouton-poussoir destinés à maintenir de manière libérable la partie arrière (2c) à l'intérieur du passage axial (4c) de l'élément formant manchon (4) et à libérer la partie arrière (2c) de la tige axiale (2) par actionnement d'un bouton-poussoir situé sur une seconde partie d'extrémité du manche ;
    la surface de paroi externe (4f) de l'élément formant manchon (4) comprend au moins un canal annulaire (4g, 4h) ;
    le corps de manche (3) est au moins radialement recouvert par une gaine (10) de matériau élastomère injectée sur le corps de manche (3) ;
    la gaine (10) comprend une partie enveloppante (10a) enveloppant le corps de manche (3), une partie de remplissage (10b) remplissant ledit canal annulaire (4g, 4h) et des parties de liaison (10c) s'étendant à travers lesdits trous traversants radiaux (3e).
  2. Manche selon la revendication 1, caractérisé en ce que la surface de paroi externe (4f) de l'élément formant manchon (4) comprend une pluralité de canaux annulaires (4g, 4h), chacun étant rempli avec une partie de remplissage (10b) du matériau élastomère de la gaine (10), chaque partie de remplissage (10b) étant reliée à la partie enveloppante (10a) par des parties de liaison (10c) du matériau élastomère s'étendant à travers une pluralité de trous traversants radiaux (3e) dans le corps de manche (3).
  3. Manche, selon la revendication 2, caractérisé en ce que le corps de manche (3) comprend une surface externe avec une pluralité de saillies (3f) qui pénètrent au moins dans des parties adjacentes du matériau élastomère de la partie enveloppante (10a) de la gaine (10).
  4. Manche selon la revendication 3, caractérisé en ce qu'au moins certaines des saillies (3f) pénètrent à travers lesdites parties adjacentes du matériau élastomère de la partie enveloppante (10a) de la gaine (10).
  5. Manche selon l'une quelconque des revendications 1 à 4, caractérisé en ce que
    la seconde extrémité du corps de manche (3) comprend une seconde ouverture (3g) communiquant avec ledit creux axial interne (3c) ;
    la seconde partie d'extrémité (4e) de l'élément formant manchon (4) comprend une seconde ouverture (4i) se trouvant axialement opposée à ladite première partie d'extrémité (4) ;
    les moyens de maintien comprennent un élément formant griffe (5) comprenant un élément formant base positionné transversalement (5a) relié à au moins deux pattes élastiquement inclinables (11) angulairement équidistantes l'une de l'autre et s'étendant à travers ledit passage interne (4c), chaque patte inclinable (11) comprenant une extrémité libre avec un épaississement (11a) pour la mise en prise libérable de ladite encoche annulaire (2f) dans ladite partie arrière (2e) lorsqu'elle est logée dans ledit passage interne (4c) dans une position verrouillée ;
    l'élément formant base (5a) est fixé à la seconde partie d'extrémité (4e) dans une position où il est adjacent à la partie d'extrémité arrière (2b) de la tige axiale (2) lorsque ladite partie arrière (2d) est dans ladite position verrouillée ;
    les pattes inclinables (11) sont positionnées radialement dans le passage interne axial (4c) de telle sorte qu'elles soient aptes à se déplacer radialement entre une première position où lesdits épaississements (11a) sont radialement les plus proches l'un de l'autre et une seconde position où lesdits épaississements (11a) sont radialement distants l'un de l'autre suffisamment pour se dégager de ladite encoche annulaire (2f) de ladite partie arrière (2d) de la tige axiale (2) ;
    un élément formant tige poussoir (12) est guidé axialement dans le creux axial (3c) du corps de manche (3), l'élément formant tige poussoir (12) comprenant une partie de tête de bouton-poussoir (12a) se trouvant au moins partiellement dans la seconde ouverture (3g) du corps de manche (3), et un élément de poussée (12b, 12f) axialement opposé à la partie de tête de bouton-poussoir (12a) ;
    l'élément formant tige poussoir (12) est mobile axialement entre une position de repos où l'élément de poussée (12b, 12f) n'agit pas sur les pattes inclinables (11) de l'élément formant griffe (5), et une position active, où l'élément de poussée (12b, 12f) amène de force les pattes inclinables (11) dans ladite seconde position ;
    l'élément formant tige poussoir (12) est maintenu dans la position de repos par un élément formant ressort (13) fournissant une résistance axiale de telle sorte que, pour déplacer l'élément formant tige poussoir (12) de la position de repos vers la position active, une force de poussée supérieure à la résistance axiale de l'élément formant ressort (13) doit être exercée sur la partie de tête de bouton-poussoir (12a).
  6. Manche selon la revendication 5, caractérisé en ce que le passage interne axial (4c) de l'élément formant manchon (4) comprend une partie étagée intermédiaire (4j) située entre ladite première partie d'extrémité (4a) et ladite seconde partie d'extrémité (4e), la partie intermédiaire (4j) ayant un diamètre plus petit que lesdites parties d'extrémité (4a, 4i) et divisant axialement le passage interne axial (4c) en une première chambre (4k) comprenant ladite section de réception (4d) et logeant le manchon denté (6), et une seconde chambre (41) logeant l'élément formant griffe (5).
  7. Manche selon la revendication 5 ou 6, caractérisé en ce que chaque épaississement (11a) comprend une glissière distale (11b) qui est inclinée vers l'intérieur vers ladite seconde extrémité (3b) du corps de manche (4), pour contribuer à permettre à la partie d'extrémité arrière (2b) de séparer les épaississements (11a) l'un de l'autre lorsque la partie arrière (2d) est insérée dans le manche (1) vers ladite position verrouillée.
  8. Manche selon l'une quelconque des revendications 5, 6 ou 7, caractérisé en ce que l'élément formant interrupteur (9) est monté de sorte à pouvoir tourner sur la première extrémité (4a) de l'élément formant manchon (4) au moyen d'un agencement de montage choisi parmi
    au moins deux languettes radiales (4q) émergeant de parties opposées d'une partie de paroi externe près de la première extrémité de l'élément formant manchon (4) et guidées radialement dans des fentes de guidage horizontal respectives (9h) fournies dans une paroi interne d'une jupe (9b) de l'élément formant interrupteur (9) qui entoure ladite partie de paroi externe de l'élément formant manchon (4) ;
    des paires respectives de languettes radiales (4q) émergeant de parties opposées d'une partie de paroi externe près de ladite première extrémité (4a) de l'élément formant manchon (4) et guidées radialement dans des fentes de guidage horizontal respectives (9h) fournies dans une surface interne d'une jupe (9b) de l'élément formant interrupteur (9) qui entoure ladite partie de paroi externe de l'élément formant manchon (4) ;
    au moins deux languettes radiales (4q) émergeant de façon équidistante l'une de l'autre au niveau d'une partie opposée d'une partie de paroi externe près de la première extrémité de l'élément formant manchon (4) et guidée radialement dans une seule fente de guidage horizontal (9h) dans une paroi interne de la jupe (9) de l'élément formant interrupteur (9) qui entoure ladite partie de paroi externe de l'élément formant manchon (4).
  9. Manche selon l'une quelconque des revendications 5 à 8, caractérisé en ce que
    les pattes inclinables (11) sont constituées d'un matériau élastique ;
    l'élément formant base (5a) de l'élément formant griffe (5) comprend un trou central (5b) qui est aligné axialement sur ledit élément formant tige poussoir (12) ;
    l'élément formant tige poussoir (12) est guidé dans le trou central (5b) au moins lorsqu'il se déplace vers ladite position active ;
    l'élément de poussée est une extrémité de poussée (12b) fournie au niveau de l'élément formant tige poussoir (12) ;
    chaque épaississement (11a) comprend une glissière proximale (11c) inclinée vers l'intérieur vers la première extrémité (3a) du corps de manche (3), pour contribuer à permettre la séparation des épaississements (11) l'un de l'autre pour qu'ils se dégagent de ladite encoche annulaire (2f) dans la partie arrière (2d) de la tige axiale (2), par le coulissement d'une partie de bord radial (12c, 12e) de l'extrémité de poussée (12b) sur les glissières proximales (11c) lorsque l'élément formant tige poussoir (12) est poussé vers la première extrémité (3a) du corps de manche (3).
  10. Manche selon la revendication 9, caractérisé en ce que
    ladite extrémité de poussée (12b) est tubulaire et comprend un alésage axial (12d) pour insérer la partie d'extrémité arrière (2b), de telle sorte que l'alésage axial (12d) loge la partie d'extrémité arrière lorsque la partie arrière (2d) est insérée dans le manche ;
    la partie de bord radial est un bord terminal (12c) d'une paroi périmétrique entourant l'alésage axial (12d).
  11. Manche selon les revendications 5 à 8, caractérisé en ce que
    chaque patte inclinable (11) comprend une première partie de patte (11d) comprenant ledit épaississement (11a) et s'étendant dans le passage interne axial (4c) de l'élément formant manchon (4) vers ladite première extrémité (3a) du corps de manche (3), et une seconde partie de patte (11e) s'étendant vers ladite seconde extrémité (3b) du corps de manche (3), et une partie de patte de liaison (11f) situé entre lesdites première et seconde parties de patte (11d, 11e) ;
    la partie de patte de liaison (11f) est reliée de sorte à pouvoir s'incliner à une partie périphérique de l'élément formant base (5a) de l'élément formant griffe (5) ;
    l'élément de poussée comprend une pluralité de pattes de poussée (12f) ;
    chaque seconde partie de patte (11e) comprend une partie d'extrémité épaissie (11g) faisant face à un bord périphérique interne (12e) des pattes de poussée (12f) ;
    chaque patte de poussée (12f) est guidée dans un évidement longitudinal (3m) à l'intérieur du creux axial interne (3c) du corps de manche (3) ;
    les pattes inclinables (11) sont reliées à la partie périphérique de l'élément formant base (5a) de telle sorte que, lorsque l'élément formant tige poussoir (12) est déplacé vers ladite position active, lesdits bords internes périphériques (12e) amènent de force les parties d'extrémité épaissies (11g) des pattes inclinables (111) à se rapprocher l'une de l'autre afin que les pattes inclinables (11) pivotent autour des parties de patte de liaison (11f) pour déplacer les premières parties de patte (11d) de ladite première à ladite seconde position ;
    les parties de patte de liaison (11f) sont reliées élastiquement à l'élément formant base (5a) de telle sorte que les pattes inclinables (11) retrouvent élastiquement leur première position.
  12. Manche selon la revendication 11, caractérisé en ce que chacune des parties d'extrémité épaissies (11g) comprend une surface de contact inclinée vers l'intérieur (11h) faisant face audit bord périphérique interne (12e) de l'une des pattes de poussée (12f).
  13. Manche selon la revendication 11 ou 12, caractérisé en ce que chaque patte de poussée (12f) est reliée à l'élément formant tige poussoir (12) au moyen d'un bras radial (121) qui émerge périphériquement de l'élément formant tige poussoir (12).
  14. Manche selon la revendication 11, 12 ou 13, caractérisé en ce que l'élément formant ressort (13) est radialement entouré au moins partiellement par une pluralité de pattes de fixation axiales (12g) dotées d'extrémités de fixation respectives (12m) fixées sur le passage interne axial (4c) de l'élément formant manchon (12) et une plaque transversale (4o) montée dans la seconde ouverture d'extrémité (41) de l'élément formant manchon (4) entre les pattes de poussée (12f).
  15. Tournevis avec tiges axiales interchangeables, caractérisé en ce qu'il comprend le manche tel que défini dans l'une quelconque des revendications précédentes.
EP20120382040 2012-02-02 2012-02-02 Manche pour un tournevis à cliqué électriquement isolé et tournevis avec un tel manche avec tige échangeable Active EP2623266B1 (fr)

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EP20120382040 EP2623266B1 (fr) 2012-02-02 2012-02-02 Manche pour un tournevis à cliqué électriquement isolé et tournevis avec un tel manche avec tige échangeable
ES12382040T ES2531001T3 (es) 2012-02-02 2012-02-02 Mango para un destornillador de trinquete eléctricamente aislado y destornillador con cañas axiales intercambiables que comprende el mango

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EP20120382040 EP2623266B1 (fr) 2012-02-02 2012-02-02 Manche pour un tournevis à cliqué électriquement isolé et tournevis avec un tel manche avec tige échangeable

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