EP2264366B1 - Handtool with incorporated burner and removable piezoelectric ignitor assembly - Google Patents

Handtool with incorporated burner and removable piezoelectric ignitor assembly Download PDF

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Publication number
EP2264366B1
EP2264366B1 EP10163806.2A EP10163806A EP2264366B1 EP 2264366 B1 EP2264366 B1 EP 2264366B1 EP 10163806 A EP10163806 A EP 10163806A EP 2264366 B1 EP2264366 B1 EP 2264366B1
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EP
European Patent Office
Prior art keywords
trigger
casing
hand tool
actuation
locking
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EP10163806.2A
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German (de)
French (fr)
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EP2264366A3 (en
EP2264366A2 (en
Inventor
Yves Guillou
Christophe Le Drappier
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Guilbert Express
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Guilbert Express
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Publication of EP2264366A2 publication Critical patent/EP2264366A2/en
Publication of EP2264366A3 publication Critical patent/EP2264366A3/en
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Publication of EP2264366B1 publication Critical patent/EP2264366B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/38—Torches, e.g. for brazing or heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/465—Details, e.g. noise reduction means for torches

Definitions

  • the piezoelectric igniter is positioned against the ignition stop and the trigger exerts a pressure on the piezoelectric igniter, thus polarizing the latter.
  • the housing includes a housing receiving a piezoelectric igniter.
  • the piezoelectric igniter is mounted on other elements present inside the housing.
  • the casing is of complex design since one must provide the housing of parts such as piezoelectric igniter, burner ...
  • the casing In the manufacture of the hand tool, the casing, generally in two parts held together by fixing the type of screw or clutch, must be open for fixing or positioning of the piezoelectric igniter.
  • This disassembly then forces the user to perform a relatively large number of operations and possibly requires the use of tools such as screwdrivers, keys, and the like.
  • This disassembly although feasible in the workshop, is sometimes a source of handling problems on the job site.
  • the worker is located above the roof and is therefore in a position suitable for disassembly of a hand tool (risk of falling screwdrivers, keys, elements of the hand tool or others).
  • the roof covering worker it is common for the roof covering worker to take only the tools strictly necessary for the roofing operation on the roof. It is therefore a problem for this worker to have to go down to get a tool needed to disassemble the hand tool and replace the piezo igniter missing.
  • the document EP 0 415 824 discloses a torch comprising a housing, a burner housed in the housing and connected to an electrically conductive member, a detent carried to displacement on the housing, an ignition stop, and a piezoelectric igniter.
  • the trigger comprises an open actuating housing receiving the piezoelectric igniter so that the piezoelectric igniter is placed facing the ignition stop and that a displacement of the trigger in an actuating direction is capable of constraining the piezoelectric igniter against the ignition stop to produce a spark at the burner.
  • this torch must be dismantled using tools in the workshop to allow the replacement of the piezoelectric igniter.
  • the document EP 0 415 824 shows a hand tool with built-in burner according to the preamble of claim 1.
  • the document US 2007/281263 as for him describes a piezoelectric igniter connected to a conductor which leads the current in a combustion tube to create a spark to ignite the fuel in the combustion tube.
  • the document EP 1 795 803 discloses a tool comprising an elongate body longitudinally traversed by a gas flow conduit to be ignited and supported by a gripping handle, and a burner portion extending the body provided at its end with gas combustion means and into which the conduit opens .
  • the burner portion has a junction portion opposite to the combustion means, the elongated body also has a junction portion.
  • the junction portion of the burner portion and the junction portion of the elongate body are shaped to reverse reversibly into one another.
  • the invention therefore aims to overcome at least one drawback above.
  • the invention provides a hand tool with built-in burner according to claim 1.
  • An advantage of the built-in burner hand tool according to the invention is to facilitate the design of the housing in which there is no need to provide a housing to maintain the piezoelectric igniter.
  • Another advantage of the built-in burner hand tool according to the invention is that to replace the faulty piezoelectric igniter, the user will only have to disassemble the trigger, an operation easier than the opening of the casing often in two connected parts to one another in several points. This operation is carried out without tools.
  • the hand tool 1 with built-in burner 3 can be a welding torch, a torch, a burner, a furnace, a soldering iron, a peel iron, or any other flame-heating device or by contact.
  • the casing 2 may be in two parts joined and held on one another by fastening means by screwing or clipping.
  • the join plane is a plane parallel to the sectional planes of the figures.
  • the housing 2 comprises a barrel 28 and a sleeve 29 arranged relative to each other so that their respective axes TT , MM form an angle preferably non-zero.
  • “Gun” means a part of revolution (around the axis TT) hollow housing 2 for housing elements of the hand tool 1 .
  • the housing 2 has an orifice 22 where the barrel 28 and the handle 29 meet. This orifice 22 extends between the barrel 28 and the handle 29 and is adapted to receive the trigger 5.
  • the orifice 22 extends parallel to the axis TT of the barrel forming a barrel portion 22t .
  • the orifice extends parallel to the axis MM of the handle forming a handle portion 22m .
  • the trigger 5 When the user wishes to operate the hand tool 1 , he operates the trigger 5 . For example, it presses the trigger 5 so that it moves along the barrel portion 22t of the orifice 22 (parallel to the axis TT of the barrel) and further enters the casing 2 by the sleeve portion 22m from the hole 22 .
  • the actuation of the trigger 5 causes a displacement of the igniter 7a piezoelectric towards the stop 6 ignition, direction referenced Sa.
  • the compression of the piezoelectric igniter 7a causes the electric polarization thereof between a piece in contact with the ignition stop 6 and a piece in contact with the blade 4 , which makes it possible to produce a spark at the burner 3 via the electrically conductive element 4 placed between the burner 3 and the piezoelectric igniter 7a .
  • the trigger 5 actuates a rod 91 connected to a transmitter 92 .
  • the transmitter 92 is an elongated member and placed in translation between a pressure reducer 93 incorporated in the hand tool 1 and a fuel gas release orifice 94 .
  • the transmitter 92 includes a gas supply channel 921 for supplying the fuel gas to an opening 922 opening radially.
  • a spring 95 forces the transmitter 92 against a valve seat 98 associated with the release port 94 .
  • the link 91 makes it possible to transform a displacement in one direction into a displacement in another direction.
  • the rod 91 activated drives the transmitter 92 in translation so as to move away from the valve seat 98 associated with the orifice 94 of release.
  • the combustible gas can then escape from the opening 922 of the transmitter 92 to the orifice 94 of release to supply the burner 3 .
  • resilient means for returning the trigger 5 bring the trigger 5 to its rest position.
  • the means are the spring 95 and the piezoelectric igniter 7a .
  • the spring 95 acts on the transmitter 92 to bring it back to its starting position, that is to say that it is forced against the valve seat 98 .
  • the return of the transmitter 92 to its starting position also returns the link 91 to its starting position and it then acts on the relaxation 5 .
  • the piezoelectric igniter 7a comprises a spring which exerts a force opposite to the compressive force exerted by the trigger 5 on the piezoelectric igniter 7a . This opposing force of return contributes to bring the trigger 5 back to its starting position.
  • a sectional difference between the outlet of the expander 93 and the seal 97 acts in concert with the spring 95 to return the transmitter 92 to its starting position. Indeed, since the same pressure prevails between the outlet of the regulator 93 (smaller section) and the seal 97 (larger section), it creates a force tending to bring the transmitter 92 back to its starting position.
  • the trigger 5 comprises a housing 51 open actuation receiving the igniter 7a piezoelectric.
  • the trigger 5 and the piezoelectric igniter 7a then form a 5-7a assembly that can be dismantled by separating the trigger 5 from the casing 2 .
  • Said actuating housing 51 has an open end facing the ignition stop 6 so that the piezoelectric igniter 7a is placed facing the ignition stop 6 .
  • a displacement of the trigger 5 is likely to constrain the piezoelectric igniter 7a against the ignition stop 6 to produce a spark at the burner 3 via the electrically conductive element 4 as described above.
  • the user when the piezoelectric igniter 7a fails, the user will not need to open the housing 2 to replace the piezoelectric igniter 7a . It will only have to extract the trigger 5 from the casing 2 , thanks to the dissociable mechanical means with complementary shape, and thereby extracting the igniter 7a piezoelectric out of the casing 2 . Also, he does not need any tools.
  • the trigger 5 and the housing 2 comprise mechanical means with complementary shape dissociable by elastic deformation.
  • the form-complementary mechanical means provided on the trigger 5 are at least one guide button 54 .
  • the complementary form of mechanical means provided on the casing 2 comprise at least one groove 24 and a protrusion 23 blocking.
  • the groove 24 is formed inside the handle 29 and opens on the handle portion 22m of the orifice 22 receiving the trigger 5 at a mouth 22e .
  • the locking projection 23 is made in the groove 24 and near the handle portion 22m of the orifice 22.
  • the guide button 54 when the trigger 5 is mounted on the casing 2 , is located in the groove 24 inside the side opposite the mouth 22e with respect to the projection 23 .
  • the button 54 and the projection 23 are adapted to cooperate elastically so that a constraint exerted on the button 54 towards the projection 24 dissociates the trigger 5 from the casing 2 .
  • the protrusion 23 blocking is a hard point to limit the movement of the trigger 5 to prevent its dissociation or separation from the housing 2 when the user does not wish.
  • the dissociable mechanical means with complementary shape can dissociate the trigger 5 of the housing 2 without the need for tools. Also, they suited to prevent a displacement of the trigger 5 in a direction opposite to its actuation does not cause the dissociation of the trigger 5 of the casing 2 while the operator does not wish the not, for example in operating mode.
  • the groove 24 may be provided parallel to the direction DD of displacement of the trigger 5 .
  • the button 54 slides in the groove 24 on the side opposite the mouth 22e with respect to the groove 24 .
  • the movement of the trigger 5 is limited by the locking projection 23 and the piezoelectric igniter 7a which has a determined compression amplitude.
  • the trigger 5 may also include a spare housing 52 for receiving a second piezoelectric igniter 7b .
  • the user will have a new piezoelectric igniter 7b . He will not have to leave his workstation to recover a new piezoelectric igniter 7b in the middle of a task. It will suffice to release the first igniter 7a piezoelectric housing 51 actuation, to place the second lighter piezoelectric reserve 7b in the housing 51 actuation. It can then, once its task is completed, or at the end of a working day, put a new piezoelectric igniter in the housing 52 reserve.
  • the reserve housing 52 does not require any particular configuration unless it allows the second piezoelectric igniter 7b to remain unconstrained during any manipulation of the hand tool 1.
  • the housing 51 for actuating is longitudinal and provided parallel to the displacement of the trigger 5
  • the housing 52 of reserve also longitudinal, is provided substantially perpendicularly to the housing 51 of actuation.
  • the casing 2 may comprise a guide 21 at the barrel 28 .
  • the trigger 5 may comprise guide means for cooperating with the guide 21 of the casing 2 .
  • a displacement in the direction Sa actuating along the guide 21 brings the igniter piezoelectric 7a of the stop 6 of ignition, and a movement in the sense opposite to its actuation along the guide 21 is capable of allow the dissociation of the trigger 5 from the housing 2 as already described above.
  • the movement of the trigger 5 is not limited by the casing 2 ; the housing 2 is opening at least partly on this side.
  • the guide 21 may be a rail, a groove, a recess or a groove; the guide means of the trigger 5 may be respectively a groove, a rib, a projection or a groove; and vice versa .
  • the displacement of the trigger 5 can be substantially straight.
  • the guide 21 and the guide means are also rectilinear. This allows a simple gesture to disassemble the trigger 5 . For example, a simple translation of the trigger 5 is necessary.
  • the hand tool 1 may further comprise a removable lance 8 comprising means for cooperation with the casing 2 for its assembly and disassembly on the casing 2 , for example by complementarity of form.
  • the lance 8 comprises a stop 82 which, in contact with the trigger 5 , prevents it from being dissociated from the casing 2.
  • the stop 82 may be a radial finger.
  • the lance 8 defines a space in which the flame produced by the burner 3 is contained.
  • the lance 8 may also delimit a space in which air is heated by the flame produced by the burner 3 .
  • the hand tool 1 may then comprise one or two elements allowing the delimitation of the movement of the trigger 5 to prevent its dissociation from the casing 2 when the user does not wish: on the one hand there is the protrusion 23 acting as hard point and secondly there is the stop 82 of the lance 8 .
  • the figure 1 represents a hand tool 1 , for example a welding lamp, with the set 5-7a piezoelectric detonator -lighter mounted on the casing 2 .
  • the stop 82 of the lance 8 prevents the assembly 5-7a from being dissociated from the casing 2 .
  • the user To disassemble or disassemble this set 5-7a piezoelectric trigger-igniter, the user must first dismount the lance 8 of the housing, for example with a quarter turn as indicated by the arrow F1 .
  • the spear 8 may be missing, in which case this step is not necessary.
  • buttons 54 are already in contact with the protrusions 23 blocking. In which case, it is not necessary to translate the buttons 54 guide in the direction of the arrow F2 beforehand.
  • the construction of the hand tool 1 requires that once the guiding buttons 54 have passed the projections 23 blocking to the sleeve portion 22m of the orifice 22 receiving the trigger 5 , the set 5-7a piezoelectric trigger-igniter must be pivoted along the arrow F3 to be able to extract the set 5-7a piezoelectric trigger-igniter, as illustrated on the figure 3 .
  • this movement may be necessary because a displacement of the set 5-7a piezoelectric trigger-igniter always in the direction of arrow F2 as on the figure 2 can cause that the piezoelectric igniter 7a abuts against another element included in the housing 2 or against the housing 2 itself.
  • the assembly of the 5-7a piezoelectric trigger-igniter assembly is performed according to the same steps described above, in the reverse order of disassembly or disassembly.
  • the trigger 5 of the hand tool 1 also allows several modes of operation of the hand tool 1 which are described hereinafter with reference to Figures 6 to 8 .
  • a hand tool 1 comprising a lance 8
  • the latter may further comprise means 83 for cooperation with the trigger 5 for blocking out of operation or unlocking.
  • the means 83 of cooperation prevent, in off-operation blocking, the displacement of the trigger 5 towards the ignition stop.
  • the means 83 for cooperation of the lance 8 are a rotary ring 83 along the axis LL (see FIG. figure 1 ) of the spear 8 .
  • the section of the ring 83 has a locking portion 831 and an unlocking portion 832 .
  • the blocking portion 831 extends radially beyond the unlocking portion 832 and over a limited angular portion to abut with a locking wedge 59 integral with the detent 5 in the off-lock mode.
  • the rotation of the ring 83 makes it possible to switch from the non-operating blocking mode ( figure 6 ) in the unlock mode (or operation, Figures 7 and 8 ). That is to say, the rotation of the ring 83 makes it possible to position either the locking portion 831 in front of the wedge 59 for locking the trigger 5 thus preventing movement of the trigger 5 along the direction Sa (see figure 1 ) actuation; either the unlocking portion 832 facing the locking wedge 59 of the trigger 5 thus releasing the movement of the trigger 5 in the Sa direction of actuation.
  • the casing 2 may also comprise a stop wedge 26 and the detent 5 a locking element 56 in operation, an instantaneous actuating portion 57 for instantaneous operation of the hand tool 1 ( figure 7 ) and a locking actuation portion 58 for locking operation of the hand tool 1 ( figure 8 ).
  • the locking element 56 is positioned above the stop wedge 26 in a direction perpendicular to the displacement direction DD of the trigger 5 .
  • the portion 57 of instantaneous operation is adapted so that when the user exerts a pressure on it, then releases the pressure, the locking element 56 moves in the direction DD of displacement of the trigger 5 , and never meets the 26 stop wedge. A combustion gas is then released at the burner 3 for the time between the moment when the instantaneous actuation portion 57 is depressed and the moment when it is released.
  • the trigger 5 sinks into the casing 2 , for example in the direction Sa ( figure 1 ).
  • the trigger 5 returns to its initial position from before pressure by the action of the resilient element for returning the trigger 5 , for example the trigger 5 moves in the direction Se ( figure 1 ).
  • the locking actuation portion 58 is adapted so that when the user exerts pressure thereon, the locking member 56 moves in the operating direction Sa , and downwardly.
  • the locking member 56 moves in the direction opposed to the direction Sa, thanks to the action of the resilient member for returning the trigger 5 and comes into contact with the stop wedge 26 thus locking the hand tool 1 in operation.
  • the trigger 5 sinks into the casing 2 .
  • the trigger 5 remains locked in a depressed position.
  • a push button is provided on the hand tool 1 and adapted to move the locking element 56 out of the wedge 26 stop, this push button moves the locking member 56 away from the stop wedge 26 in the operating direction Ra and upwardly. The user will only have to press this button to return the trigger 5 to its initial position.
  • the user is not obliged to maintain the trigger 5 during prolonged use of the hand tool 1 .
  • the fact that the modes of use in instantaneous operation or in locking can be selected by exerting pressure on different parts of the trigger 5 allows the user to switch from one mode to another easily.
  • the user only needs one hand and one movement to be able to use the hand tool 1 in lock-up operation mode.
  • the groove 24 is parallel to the direction DD of displacement of the trigger 5 .
  • the instantaneous actuating portion 57 is located opposite the groove 24 . Thus, when the user exerts pressure on this portion 57 of instantaneous actuation, the trigger performs a simple translation in the direction DD , as well as the locking element 56 .
  • the locking actuation portion 58 is located such that an imaginary line connecting the locking actuating portion 58 and the knob 24 forms an angle with the groove 24 .
  • the button 24 serves as a pivot to the pivoting movement; the locking element 56 moves downwards.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Lighters Containing Fuel (AREA)

Description

Domaine de l'inventionField of the invention

L'invention concerne le domaine des outils à main avec brûleur incorporé comprenant :

  • un carter ;
  • un brûleur logé dans le carter et relié à un élément électriquement conducteur ;
  • une détente portée à déplacement sur le carter ;
  • une butée d'allumage ; et
  • un allumeur piézoélectrique.
The invention relates to the field of hand tools with built-in burner comprising:
  • a crankcase;
  • a burner housed in the housing and connected to an electrically conductive element;
  • a detent carried to displacement on the housing;
  • an ignition stop; and
  • a piezoelectric igniter.

L'allumeur piézoélectrique est positionné contre la butée d'allumage et la détente vient exercer une pression sur l'allumeur piézoélectrique, polarisant ainsi ce dernier.The piezoelectric igniter is positioned against the ignition stop and the trigger exerts a pressure on the piezoelectric igniter, thus polarizing the latter.

État de la technique antérieureState of the art

Dans certains outils à main avec brûleur conventionnels, le carter comprend un logement recevant un allumeur piézoélectrique. Dans d'autres, l'allumeur piézoélectrique est monté sur d'autres éléments présents à l'intérieur du carter.In some hand tools with conventional burner, the housing includes a housing receiving a piezoelectric igniter. In others, the piezoelectric igniter is mounted on other elements present inside the housing.

Ainsi, le carter est de conception complexe puisque l'on doit prévoir le logement de pièces telles qu'allumeur piézoélectrique, brûleur...Thus, the casing is of complex design since one must provide the housing of parts such as piezoelectric igniter, burner ...

Aussi, lors de la fabrication de l'outil à main, le carter, généralement en deux parties maintenues entre elles par fixation du type vis ou enclispage, doit être ouvert pour la fixation ou le positionnement de l'allumeur piézoélectrique.Also, during the manufacture of the hand tool, the casing, generally in two parts held together by fixing the type of screw or clutch, must be open for fixing or positioning of the piezoelectric igniter.

Aussi, quand l'allumeur piézoélectrique est endommagé ou est usagé, son remplacement nécessite le démontage de l'outil à main et au moins l'ouverture du carter.Also, when the piezoelectric igniter is damaged or is used, its replacement requires the disassembly of the hand tool and at least the opening of the housing.

Ce démontage oblige alors l'utilisateur à procéder à un nombre relativement conséquent d'opérations et nécessite éventuellement l'emploi d'outils tels que tournevis, clefs, et semblables.This disassembly then forces the user to perform a relatively large number of operations and possibly requires the use of tools such as screwdrivers, keys, and the like.

Ce démontage bien que faisable en atelier, est parfois source de problèmes de manipulation sur le site de travail. Par exemple pour des travaux de couverture de toit, l'ouvrier est situé au-dessus du toit et est donc dans une position peut adéquate à un démontage d'un outil à main (risque de chute de tournevis, clefs, éléments de l'outil à main ou autres). Également, il est courant que l'ouvrier s'occupant de la couverture d'un toit n'emporte sur le toit que les outils strictement nécessaires à l'opération de couverture. C'est donc un problème pour cet ouvrier que de devoir redescendre pour aller chercher un outil nécessaire au démontage de l'outil à main et remplacer l'allumeur piézoélectrique faisant défaut.This disassembly, although feasible in the workshop, is sometimes a source of handling problems on the job site. For example for roofing work, the worker is located above the roof and is therefore in a position suitable for disassembly of a hand tool (risk of falling screwdrivers, keys, elements of the hand tool or others). Also, it is common for the roof covering worker to take only the tools strictly necessary for the roofing operation on the roof. It is therefore a problem for this worker to have to go down to get a tool needed to disassemble the hand tool and replace the piezo igniter missing.

Le document EP 0 415 824 décrit un chalumeau comprenant un carter, un bruleur logé dans le carter et relié à un élément électriquement conducteur, une détente portée à déplacement sur le carter, une butée d'allumage, et un allumeur piézoélectrique. La détente comprend un logement ouvert d'actionnement recevant l'allumeur piézoélectrique de sorte que l'allumeur piézoélectrique soit placé en regard de la butée d'allumage et qu'un déplacement de la détente dans un sens d'actionnement soit susceptible de contraindre l'allumeur piézoélectrique contre la butée d'allumage pour produire une étincelle au niveau du brûleur. Toutefois, ce chalumeau doit être démonté à l'aide d'outils en atelier pour permettre le remplacement de l'allumeur piézoélectrique. Le document EP 0 415 824 montre un outil à main avec brûleur incorporé selon le préambule de la revendication 1. Le document US 2007/281263 quant à lui décrit un allumeur piézo-électrique relié à un conducteur qui conduit le courant dans un tube de combustion afin de créer une étincelle pour allumer le carburant dans le tube de combustion.The document EP 0 415 824 discloses a torch comprising a housing, a burner housed in the housing and connected to an electrically conductive member, a detent carried to displacement on the housing, an ignition stop, and a piezoelectric igniter. The trigger comprises an open actuating housing receiving the piezoelectric igniter so that the piezoelectric igniter is placed facing the ignition stop and that a displacement of the trigger in an actuating direction is capable of constraining the piezoelectric igniter against the ignition stop to produce a spark at the burner. However, this torch must be dismantled using tools in the workshop to allow the replacement of the piezoelectric igniter. The document EP 0 415 824 shows a hand tool with built-in burner according to the preamble of claim 1. The document US 2007/281263 as for him describes a piezoelectric igniter connected to a conductor which leads the current in a combustion tube to create a spark to ignite the fuel in the combustion tube.

Enfin, le document EP 1 795 803 décrit un outil à comprenant un corps allongé traversé longitudinalement par un conduit de circulation de gaz à enflammer et supporté par une poignée de préhension, et une partie brûleur prolongeant le corps munie à son extrémité de moyens de combustion de gaz et dans laquelle débouche le conduit. La partie brûleur présente une portion de jonction opposée aux moyens de combustion, le corps allongé présente également une portion de jonction. La portion de jonction de la partie brûleur et la portion de jonction du corps allongé sont conformées de manière à s'emmancher réversiblement l'une dans l'autre.Finally, the document EP 1 795 803 discloses a tool comprising an elongate body longitudinally traversed by a gas flow conduit to be ignited and supported by a gripping handle, and a burner portion extending the body provided at its end with gas combustion means and into which the conduit opens . The burner portion has a junction portion opposite to the combustion means, the elongated body also has a junction portion. The junction portion of the burner portion and the junction portion of the elongate body are shaped to reverse reversibly into one another.

Présentation de l'inventionPresentation of the invention

L'invention a donc pour but de palier au moins un inconvénient ci-dessus.The invention therefore aims to overcome at least one drawback above.

Pour cela, l'invention propose un outil à main avec brûleur incorporé selon la revendication 1. Un avantage de l'outil à main à brûleur incorporé selon l'invention est de faciliter la conception du carter dans lequel il n'est pas besoin de prévoir un logement pour maintenir l'allumeur piézoélectrique.For this, the invention provides a hand tool with built-in burner according to claim 1. An advantage of the built-in burner hand tool according to the invention is to facilitate the design of the housing in which there is no need to provide a housing to maintain the piezoelectric igniter.

D'autres caractéristiques optionnelles et non limitatives sont :

  • le carter comprend un manche et un orifice au niveau du manche recevant la détente ; les moyens mécaniques à complémentarité de forme prévus sur la détente sont au moins un bouton de guidage ; et les moyens mécaniques à complémentarité de forme prévus sur le carter comprennent au moins une rainure interne au niveau du manche et débouchant sur l'orifice recevant la détente, au niveau d'une embouchure, et une saillie de blocage dans la rainure et près de l'orifice ;
    le bouton de guidage étant situé dans la rainure interne du côté opposé à l'embouchure par rapport à la saillie ;
    le bouton et la saillie étant adaptés pour coopérer de manière élastique de sorte qu'une contrainte exercée sur le bouton en direction de la saillie permette de dissocier la détente du carter ;
  • la détente comprend en outre un logement de réserve pour recevoir un deuxième allumeur piézoélectrique ;
  • le carter comprend un canon et au moins un guide au niveau du canon pour guider la détente dans son déplacement ; la détente comprend des moyens de guidage pour coopérer avec le guide du carter ;
    un déplacement dans le sens d'actionnement le long du guide rapprochant l'allumeur piézoélectrique de la butée d'allumage, et
    un déplacement dans un sens opposé au sens d'actionnement le long du guide étant susceptible de permettre la dissociation de la détente d'avec le carter ;
  • l'outil à main comprend en outre une lance démontable comprenant des moyens de coopération avec le carter pour son montage et démontage sur le carter ; et la lance comprend également une butée qui, au contact de la détente, empêche celle-ci d'être dissociée du carter ;
  • la lance comprend en outre des moyens de coopération avec la détente pour le verrouillage hors fonctionnement ou déverrouillage de celle-ci, les moyens de coopération :
  • empêchant, en verrouillage hors fonctionnement, le déplacement de la détente dans le sens d'actionnement par butée mécanique ; et
  • libérant, en déverrouillage, le déplacement de la détente dans le sens d'actionnement pour mettre la butée d'allumage et l'allumeur piézoélectrique en contact ;
  • les moyens de coopération de la lance sont un anneau rotatif selon l'axe de la lance, et dont la section présente une partie de blocage et une partie de déblocage, la partie de blocage s'étendant radialement au-delà de la partie de déblocage sur une portion de l'anneau inférieure à 360° pour entrer en butée avec un coin de blocage prévu sur la détente, en verrouillage ;
  • le carter comprend un coin d'arrêt, la détente comprend un élément de verrouillage en fonctionnement, une partie d'actionnement instantané pour un fonctionnement instantané de l'outil à main et une partie d'actionnement en verrouillage pour un fonctionnement en verrouillage de l'outil à main,
    la partie d'actionnement instantané actionnée entraînant l'élément de verrouillage en mouvement suivant la direction de déplacement de la détente ; et
    la partie d'actionnement en verrouillage entraînant l'élément de verrouillage en mouvement vers le coin d'arrêt, et verrouillant ainsi l'outil à main en fonctionnement ;
  • la rainure est parallèle à la direction de déplacement de la détente ; les parties d'actionnement sont actionnées par pression sur celles-ci ; la partie d'actionnement instantané est située face à la rainure ; et la partie d'actionnement en verrouillage est située de manière à ce qu'une ligne imaginaire reliant la partie d'actionnement en verrouillage et le bouton forme un angle avec la rainure.
Other optional and non-limiting features are:
  • the casing comprises a handle and an orifice at the handle receiving the trigger; the mechanical means with complementary shape provided on the trigger are at least one guide button; and the mechanical means with complementary shape provided on the housing comprise at least one internal groove at the handle and opening on the orifice receiving the trigger, at a mouth, and a locking projection in the groove and near the orifice;
    the guide button being located in the internal groove on the side opposite the mouth relative to the projection;
    the button and the projection being adapted to cooperate elastically so that a stress exerted on the button in the direction of the projection allows to separate the trigger housing;
  • the trigger further comprises a spare housing for receiving a second piezoelectric igniter;
  • the housing comprises a barrel and at least one guide at the barrel to guide the relaxation in its movement; the trigger comprises guiding means for cooperating with the casing guide;
    a displacement in the direction of actuation along the guide bringing the piezoelectric igniter closer to the ignition stop, and
    a displacement in a direction opposite to the direction of actuation along the guide being able to allow the dissociation of the trigger from the housing;
  • the hand tool further comprises a removable lance including means for cooperation with the housing for mounting and dismounting on the housing; and the lance also comprises a stop which, in contact with the trigger, prevents it from being separated from the casing;
  • the lance further comprises means for cooperation with the trigger for the locking out of operation or unlocking thereof, the cooperation means:
  • preventing, in non-operating lock, the movement of the trigger in the direction of actuation by mechanical stop; and
  • releasing, in unlocking, the displacement of the trigger in the direction of actuation to put the ignition stop and the piezoelectric igniter in contact;
  • the means for cooperation of the lance are a ring rotatable along the axis of the lance, and whose section has a locking portion and an unlocking portion, the locking portion extending radially beyond the unlocking portion on a portion of the lower ring 360 ° to abut with a locking wedge provided on the trigger, in lock;
  • the housing comprises a stopping wedge, the detent comprises a locking element in operation, an instantaneous actuating part for instant operation of the hand tool and a locking actuating part for locking operation of the hand tool,
    the actuated instantaneous actuating portion driving the locking element in motion in the direction of movement of the trigger; and
    the locking actuating portion driving the locking member in motion toward the stopping corner, and thereby locking the hand tool in operation;
  • the groove is parallel to the direction of movement of the trigger; the actuating parts are actuated by pressure thereon; the instantaneous actuating portion is located opposite the groove; and the latching actuating portion is located such that an imaginary line connecting the latching operating portion and the knob forms an angle with the groove.

Un autre avantage de l'outil à main à brûleur incorporé selon l'invention est que pour remplacer l'allumeur piézoélectrique défaillant, l'utilisateur n'aura qu'à démonter la détente, opération plus aisée que l'ouverture du carter souvent en deux parties reliées l'une à l'autre en plusieurs points. Cette opération se réalise sans outils.Another advantage of the built-in burner hand tool according to the invention is that to replace the faulty piezoelectric igniter, the user will only have to disassemble the trigger, an operation easier than the opening of the casing often in two connected parts to one another in several points. This operation is carried out without tools.

Présentation des dessinsPresentation of drawings

D'autres caractéristiques, buts et avantages ressortiront de la lecture de la description détaillée qui suit, en référence aux dessins donnés à titre illustratif et non limitatif, parmi lesquels :

  • la figure 1 est une vue latérale de l'outil à main selon l'invention, dans lequel une partie du carter a été enlevée pour montrer la détente montée sur le carter ;
  • les figures 2, 3 et 4 sont des vues latérales de l'outil à main selon l'invention, dans lequel une partie du carter a été enlevée et montrant différentes étapes du démontage de la détente ;
  • la figure 5 est une vue en coupe longitudinale de la détente montée sur le carter ;
  • la figure 6 est une vue en coupe longitudinale et agrandie par rapport à la figure 5 d'une partie de la détente faisant face à la lance en mode blocage hors fonctionnement ;
  • la figure 7 est une vue en coupe et agrandie par rapport à la figure 5 d'une partie de la détente faisant face à la lance en mode actionnement instantané, le plan de coupe étant parallèle et différent des figures 5 et 6 ; et
  • la figure 8 est une vue en coupe et agrandie par rapport à la figure 5 d'une partie de la détente faisant face à la lance en mode actionnement en verrouillage, le plan de coupe étant parallèle et différent des figures 5 et 6.
Other characteristics, objects and advantages will emerge from the reading of the detailed description which follows, with reference to the drawings given by way of non-limiting illustration, among which:
  • the figure 1 is a side view of the hand tool according to the invention, wherein a portion of the housing has been removed to show the trigger mounted on the housing;
  • the figures 2 , 3 and 4 are side views of the hand tool according to the invention, wherein a portion of the housing has been removed and showing different steps of disassembly of the trigger;
  • the figure 5 is a longitudinal sectional view of the detent mounted on the housing;
  • the figure 6 is a longitudinal sectional view and enlarged with respect to the figure 5 a part of the trigger facing the lance in lockout mode;
  • the figure 7 is a sectional view and enlarged with respect to the figure 5 a portion of the trigger facing the lance in instantaneous operation mode, the cutting plane being parallel and different from Figures 5 and 6 ; and
  • the figure 8 is a sectional view and enlarged with respect to the figure 5 of a portion of the trigger facing the lance in locking operation mode, the cutting plane being parallel and different from Figures 5 and 6 .

Description détaillée de l'inventionDetailed description of the invention Détente et allumeur piézoélectrique démontablesRemovable detent and piezoelectric igniter

Un outil à main avec brûleur incorporé est décrit ci-après, en référence aux figures 1 à 5.A hand tool with built-in burner is described below, with reference to Figures 1 to 5 .

L'outil à main 1 avec brûleur 3 incorporé peut être une lampe à souder, un chalumeau, un brûleur, un générateur d'air chaud, un fer à souder, un fer à écorner, ou tout autre dispositif de chauffe par flamme ou par contact.The hand tool 1 with built-in burner 3 can be a welding torch, a torch, a burner, a furnace, a soldering iron, a peel iron, or any other flame-heating device or by contact.

Par souci de clarté, la description ci-après peut parfois être faite en référence à une lampe à souder. Ce choix ne doit pas être entendu comme une limitation de l'invention, mais l'homme du métier saura transposer cette description aux autres outils à main mentionnées dans le paragraphe précédent.For the sake of clarity, the following description may sometimes be made with reference to a lamp to be welded. This choice should not be understood as a limitation of the invention, but the skilled person will transpose this description to other hand tools mentioned in the previous paragraph.

L'outil à main 1 comprend :

  • un carter 2 ;
  • un brûleur 3 logé dans le carter 2 et relié à un élément 4 électriquement conducteur ;
  • une détente 5 portée à déplacement sur le carter 2 suivant une direction D-D ;
  • une butée 6 d'allumage ; et
  • un allumeur 7a piézoélectrique.
The hand tool 1 comprises:
  • a housing 2 ;
  • a burner 3 housed in the casing 2 and connected to an electrically conductive element 4 ;
  • a detent 5 moved to the housing 2 in a direction DD;
  • an ignition stop 6 ; and
  • a piezoelectric igniter 7a .

Le carter 2 peut être en deux parties jointes et maintenues l'une sur l'autre par des moyens de fixation par vissage ou enclipsage. Le plan de jointure est un plan parallèle aux plans de coupe des figures.The casing 2 may be in two parts joined and held on one another by fastening means by screwing or clipping. The join plane is a plane parallel to the sectional planes of the figures.

La carter 2 comprend un canon 28 et un manche 29 agencés l'un par rapport à l'autre de manière à ce que leurs axes respectifs T-T, M-M forment un angle de préférence non nul.The housing 2 comprises a barrel 28 and a sleeve 29 arranged relative to each other so that their respective axes TT , MM form an angle preferably non-zero.

On entend par « canon » une partie de révolution (autour de l'axe T-T) creuse du carter 2 pour le logement d'éléments de l'outil à main 1. Le carter 2 présente un orifice 22 là où le canon 28 et le manche 29 se rejoignent. Cet orifice 22 s'étend entre le canon 28 et le manche 29 et est adaptée pour recevoir la détente 5. Au niveau du canon 28, l'orifice 22 s'étend parallèlement à l'axe T-T du canon formant une partie canon 22t. Au niveau du manche, l'orifice s'étend parallèlement à l'axe M-M du manche formant une partie manche 22m."Gun" means a part of revolution (around the axis TT) hollow housing 2 for housing elements of the hand tool 1 . The housing 2 has an orifice 22 where the barrel 28 and the handle 29 meet. This orifice 22 extends between the barrel 28 and the handle 29 and is adapted to receive the trigger 5. At the barrel 28 , the orifice 22 extends parallel to the axis TT of the barrel forming a barrel portion 22t . At the handle, the orifice extends parallel to the axis MM of the handle forming a handle portion 22m .

Lorsque l'utilisateur souhaite mettre en fonctionnement l'outil à main 1, il actionne la détente 5. Par exemple, il presse sur la détente 5 pour que celle-ci se déplace le long de la partie canon 22t de l'orifice 22 (soit parallèlement à l'axe T-T du canon) et entre davantage dans le carter 2 par la partie manche 22m de l'orifice 22. L'actionnement de la détente 5 entraîne un déplacement de l'allumeur 7a piézoélectrique vers la butée 6 d'allumage, sens référencé Sa.When the user wishes to operate the hand tool 1 , he operates the trigger 5 . For example, it presses the trigger 5 so that it moves along the barrel portion 22t of the orifice 22 (parallel to the axis TT of the barrel) and further enters the casing 2 by the sleeve portion 22m from the hole 22 . The actuation of the trigger 5 causes a displacement of the igniter 7a piezoelectric towards the stop 6 ignition, direction referenced Sa.

Lors du déplacement de l'allumeur 7a piézoélectrique vers la butée 6 d'allumage, l'allumeur 7a piézoélectrique vient au contact de la butée 6 d'allumage. Puis, un déplacement supplémentaire de l'allumeur 7a toujours dans le même sens Sa entraîne une compression de l'allumeur 7a puisque celui-ci se retrouve contraint par la butée 6 d'allumage.When the piezoelectric igniter 7a is moved towards the ignition stop 6 , the piezoelectric igniter 7a comes into contact with the ignition stop 6 . Then, an additional displacement of the igniter 7a always in the same direction Sa causes a compression of the igniter 7a since it is found constrained by the stop 6 ignition.

La compression de l'allumeur 7a piézoélectrique provoque la polarisation électrique de celui-ci entre une pièce en contact avec la butée d'allumage 6 et une pièce en contact avec la lame 4, ce qui permet de produire une étincelle au niveau du brûleur 3 via l'élément 4 électriquement conducteur placé entre le brûleur 3 et l'allumeur 7a piézoélectrique.The compression of the piezoelectric igniter 7a causes the electric polarization thereof between a piece in contact with the ignition stop 6 and a piece in contact with the blade 4 , which makes it possible to produce a spark at the burner 3 via the electrically conductive element 4 placed between the burner 3 and the piezoelectric igniter 7a .

Pendant ce temps, dans un exemple d'outil à main 1, lors du déplacement de la détente 5 faisant entraîner l'allumeur 7a vers la butée 6 d'allumage, la détente 5 actionne une biellette 91 liée à un transmetteur 92. Le transmetteur 92 est un élément allongé et placé à translation entre un détendeur 93 incorporé dans l'outil à main 1 et un orifice 94 de libération de gaz combustible. Le transmetteur 92 comprend un canal 921 de transmission de gaz pour amener le gaz combustible jusqu'à une ouverture 922 débouchant radialement. Un ressort 95 force le transmetteur 92 contre un siège de clapet 98 associé à l'orifice 94 de libération. Deux joints toriques 96, 97 de part et d'autre de l'ouverture 922 et sur le transmetteur 92 assurent l'étanchéité au niveau de l'orifice 94 de libération quand le transmetteur 92 est forcé contre le siège de clapet 98 associé à l'orifice 94 de libération. La biellette 91 permet de transformer un déplacement suivant une direction en un déplacement suivant une autre direction. Ainsi, la biellette 91 activée entraîne le transmetteur 92 en translation de manière à l'éloigner du siège de clapet 98 associé à l'orifice 94 de libération. Le gaz combustible peut alors s'échapper de l'ouverture 922 du transmetteur 92 vers l'orifice 94 de libération pour alimenter le brûleur 3.Meanwhile, in an example of a hand tool 1 , during the displacement of the trigger 5 causing the igniter 7a towards the ignition stop 6 , the trigger 5 actuates a rod 91 connected to a transmitter 92 . The transmitter 92 is an elongated member and placed in translation between a pressure reducer 93 incorporated in the hand tool 1 and a fuel gas release orifice 94 . The transmitter 92 includes a gas supply channel 921 for supplying the fuel gas to an opening 922 opening radially. A spring 95 forces the transmitter 92 against a valve seat 98 associated with the release port 94 . Two O-rings 96 , 97 on either side of the opening 922 and on the transmitter 92 seal at the release port 94 when the transmitter 92 is forced against the valve seat 98 associated with the orifice 94 of release. The link 91 makes it possible to transform a displacement in one direction into a displacement in another direction. Thus, the rod 91 activated drives the transmitter 92 in translation so as to move away from the valve seat 98 associated with the orifice 94 of release. The combustible gas can then escape from the opening 922 of the transmitter 92 to the orifice 94 of release to supply the burner 3 .

Lorsque l'utilisateur cesse d'actionner la détente 5, des moyens résilients de rappel de la détente 5 ramènent la détente 5 à sa position de repos. Par exemple, les moyens sont le ressort 95 et l'allumeur 7a piézoélectrique. Le ressort 95 agit sur le transmetteur 92 pour ramener celui-ci à sa position de départ, c'est à dire qu'il est contraint contre le siège de clapet 98. Le retour du transmetteur 92 à sa position de départ fait également revenir la biellette 91 à sa position de départ et celle-ci agit alors sur la détente 5. Aussi, l'allumeur 7a piézoélectrique comprend un ressort qui exerce une force opposée à la force de compression qu'exerce la détente 5 sur l'allumeur 7a piézoélectrique. Cette force opposée de rappel contribue à ramener la détente 5 à sa position de départ. Aussi, par exemple, une différence de section entre la sortie du détendeur 93 et le joint 97 agit de concert avec le ressort 95 pour ramener le transmetteur 92 à sa position de départ. En effet, puisque la même pression règne entre la sortie du détendeur 93 (section plus petite) et le joint 97 (section plus grande), il se créer une force tendant à ramener le transmetteur 92 à sa position de départ.When the user stops operating the trigger 5 , resilient means for returning the trigger 5 bring the trigger 5 to its rest position. For example, the means are the spring 95 and the piezoelectric igniter 7a . The spring 95 acts on the transmitter 92 to bring it back to its starting position, that is to say that it is forced against the valve seat 98 . The return of the transmitter 92 to its starting position also returns the link 91 to its starting position and it then acts on the relaxation 5 . Also, the piezoelectric igniter 7a comprises a spring which exerts a force opposite to the compressive force exerted by the trigger 5 on the piezoelectric igniter 7a . This opposing force of return contributes to bring the trigger 5 back to its starting position. Also, for example, a sectional difference between the outlet of the expander 93 and the seal 97 acts in concert with the spring 95 to return the transmitter 92 to its starting position. Indeed, since the same pressure prevails between the outlet of the regulator 93 (smaller section) and the seal 97 (larger section), it creates a force tending to bring the transmitter 92 back to its starting position.

La détente 5 comprend un logement 51 ouvert d'actionnement recevant l'allumeur 7a piézoélectrique. La détente 5 et l'allumeur 7a piézoélectrique forment alors un ensemble 5-7a démontable par la désolidarisation de la détente 5 d'avec le carter 2.The trigger 5 comprises a housing 51 open actuation receiving the igniter 7a piezoelectric. The trigger 5 and the piezoelectric igniter 7a then form a 5-7a assembly that can be dismantled by separating the trigger 5 from the casing 2 .

Ledit logement 51 d'actionnement possède une extrémité ouverte en regard de la butée 6 d'allumage de sorte que l'allumeur 7a piézoélectrique soit placé en regard de la butée 6 d'allumage. Ainsi un déplacement de la détente 5 est susceptible de contraindre l'allumeur 7a piézoélectrique contre la butée 6 d'allumage pour produire une étincelle au niveau du brûleur 3 via l'élément 4 électriquement conducteur comme décrit ci-dessus.Said actuating housing 51 has an open end facing the ignition stop 6 so that the piezoelectric igniter 7a is placed facing the ignition stop 6 . Thus a displacement of the trigger 5 is likely to constrain the piezoelectric igniter 7a against the ignition stop 6 to produce a spark at the burner 3 via the electrically conductive element 4 as described above.

Ainsi, quand l'allumeur 7a piézoélectrique est défaillant, l'utilisateur n'aura pas besoin d'ouvrir le carter 2 pour remplacer l'allumeur 7a piézoélectrique. Il n'aura qu'à extraire la détente 5 du carter 2, grâce aux moyens mécaniques dissociables à complémentarité de forme, et extrayant par là-même l'allumeur 7a piézoélectrique hors du carter 2. Aussi, il n'a pas besoin d'outil.Thus, when the piezoelectric igniter 7a fails, the user will not need to open the housing 2 to replace the piezoelectric igniter 7a . It will only have to extract the trigger 5 from the casing 2 , thanks to the dissociable mechanical means with complementary shape, and thereby extracting the igniter 7a piezoelectric out of the casing 2 . Also, he does not need any tools.

Pour faciliter la dissociation de la détente d'avec le carter, la détente 5 et le carter 2 comprennent des moyens mécaniques à complémentarité de forme dissociables par déformation élastique.To facilitate the dissociation of the trigger from the housing, the trigger 5 and the housing 2 comprise mechanical means with complementary shape dissociable by elastic deformation.

Par exemple, les moyens mécaniques à complémentarité de forme prévus sur la détente 5 sont au moins un bouton 54 de guidage. Les moyens mécaniques à complémentarité de forme prévus sur le carter 2 comprennent au moins une rainure 24 et une saillie 23 de blocage. La rainure 24 est réalisée à l'intérieur du manche 29 et débouche sur la partie manche 22m de l'orifice 22 recevant la détente 5 au niveau d'une embouchure 22e. La saillie 23 de blocage est réalisée dans la rainure 24 et près de la partie manche 22m de l'orifice 22. For example, the form-complementary mechanical means provided on the trigger 5 are at least one guide button 54 . The complementary form of mechanical means provided on the casing 2 comprise at least one groove 24 and a protrusion 23 blocking. The groove 24 is formed inside the handle 29 and opens on the handle portion 22m of the orifice 22 receiving the trigger 5 at a mouth 22e . The locking projection 23 is made in the groove 24 and near the handle portion 22m of the orifice 22.

Le bouton 54 de guidage, lorsque la détente 5 est montée sur le carter 2, est situé dans la rainure 24 interne du côté opposé à l'embouchure 22e par rapport à la saillie 23. Le bouton 54 et la saillie 23 sont adaptés pour coopérer de manière élastique de sorte qu'une contrainte exercée sur le bouton 54 vers la saillie 24 dissocie la détente 5 du carter 2.The guide button 54 , when the trigger 5 is mounted on the casing 2 , is located in the groove 24 inside the side opposite the mouth 22e with respect to the projection 23 . The button 54 and the projection 23 are adapted to cooperate elastically so that a constraint exerted on the button 54 towards the projection 24 dissociates the trigger 5 from the casing 2 .

La saillie 23 de blocage est un point dur permettant de limiter le mouvement de la détente 5 pour éviter sa dissociation ou désolidarisation d'avec le carter 2 quand l'utilisateur ne le souhaite pas.The protrusion 23 blocking is a hard point to limit the movement of the trigger 5 to prevent its dissociation or separation from the housing 2 when the user does not wish.

Les moyens mécaniques dissociables à complémentarité de forme permettent de dissocier la détente 5 du carter 2 sans avoir besoin d'outil. Aussi, permettent-ils d'empêcher qu'un déplacement de la détente 5 dans un sens Se opposé au sens Sa d'actionnement n'entraîne la dissociation de la détente 5 d'avec le carter 2 alors que l'opérateur ne le souhaite pas, par exemple en mode fonctionnement.The dissociable mechanical means with complementary shape can dissociate the trigger 5 of the housing 2 without the need for tools. Also, they suited to prevent a displacement of the trigger 5 in a direction opposite to its actuation does not cause the dissociation of the trigger 5 of the casing 2 while the operator does not wish the not, for example in operating mode.

La rainure 24 peut être prévue parallèle à la direction D-D de déplacement de la détente 5. Dans ce cas, le bouton 54 coulisse dans la rainure 24 du côté opposé à l'embouchure 22e par rapport à la rainure 24. Le mouvement de la détente 5 est limité par la saillie 23 de blocage et l'allumeur 7a piézoélectrique qui possède une amplitude de compression déterminée.The groove 24 may be provided parallel to the direction DD of displacement of the trigger 5 . In this case, the button 54 slides in the groove 24 on the side opposite the mouth 22e with respect to the groove 24 . The movement of the trigger 5 is limited by the locking projection 23 and the piezoelectric igniter 7a which has a determined compression amplitude.

La détente 5 peut également comprendre un logement 52 de réserve pour recevoir un deuxième allumeur 7b piézoélectrique.The trigger 5 may also include a spare housing 52 for receiving a second piezoelectric igniter 7b .

Ainsi, lors d'une défaillance du premier allumeur 7a piézoélectrique, qui est par nature imprévisible, l'utilisateur disposera d'un allumeur 7b piézoélectrique neuf. Il n'aura donc pas à quitter son poste de travail pour aller récupérer un nouvel allumeur 7b piézoélectrique au milieu d'une tâche. Il lui suffira de sortir le premier allumeur 7a piézoélectrique du logement 51 d'actionnement, de placer le deuxième allumeur 7b piézoélectrique de réserve dans le logement 51 d'actionnement. Il pourra ensuite, une fois sa tâche terminée, ou à la fin d'une journée de travail, remettre un nouvel allumeur piézoélectrique dans le logement 52 de réserve.Thus, during a failure of the first piezoelectric igniter 7a , which is inherently unpredictable, the user will have a new piezoelectric igniter 7b . He will not have to leave his workstation to recover a new piezoelectric igniter 7b in the middle of a task. It will suffice to release the first igniter 7a piezoelectric housing 51 actuation, to place the second lighter piezoelectric reserve 7b in the housing 51 actuation. It can then, once its task is completed, or at the end of a working day, put a new piezoelectric igniter in the housing 52 reserve.

Le logement 52 de réserve ne nécessite pas de configuration particulière si ce n'est permettre au deuxième allumeur 7b piézoélectrique de rester non contraint lors de toute manipulation de l'outil à main 1. Par exemple, comme illustré sur la figure 5, le logement 51 d'actionnement est longitudinal et prévu parallèlement au déplacement de la détente 5, alors que le logement 52 de réserve, également longitudinal, est prévu sensiblement perpendiculairement au logement 51 d'actionnement.The reserve housing 52 does not require any particular configuration unless it allows the second piezoelectric igniter 7b to remain unconstrained during any manipulation of the hand tool 1. For example, as illustrated in FIG. figure 5 , the housing 51 for actuating is longitudinal and provided parallel to the displacement of the trigger 5 , while the housing 52 of reserve, also longitudinal, is provided substantially perpendicularly to the housing 51 of actuation.

Pour le guidage de la détente 5 sur le carter 2, le carter 2 peut comprendre un guide 21 au niveau du canon 28. La détente 5 peut comprendre des moyens de guidage pour coopérer avec le guide 21 du carter 2.For guiding the trigger 5 on the casing 2 , the casing 2 may comprise a guide 21 at the barrel 28 . The trigger 5 may comprise guide means for cooperating with the guide 21 of the casing 2 .

Un déplacement dans le sens Sa d'actionnement le long du guide 21 rapproche l'allumeur 7a piézoélectrique de la butée 6 d'allumage, et un déplacement dans le sens Se opposé au sens Sa d'actionnement le long du guide 21 est susceptible de permettre la dissociation de la détente 5 d'avec le carter 2 comme déjà décrit ci-dessus.A displacement in the direction Sa actuating along the guide 21 brings the igniter piezoelectric 7a of the stop 6 of ignition, and a movement in the sense opposite to its actuation along the guide 21 is capable of allow the dissociation of the trigger 5 from the housing 2 as already described above.

Plus précisément, dans le sens Se le mouvement de la détente 5 n'est pas limité par le carter 2 ; le carter 2 est débouchant au moins en partie de ce côté.More specifically, in the direction Se the movement of the trigger 5 is not limited by the casing 2 ; the housing 2 is opening at least partly on this side.

Le guide 21 peut être un rail, une rainure, un évidement ou une gorge ; les moyens de guidage de la détente 5 peuvent être respectivement une rainure, une nervure, une saillie ou une gorge ; et vice et versa.The guide 21 may be a rail, a groove, a recess or a groove; the guide means of the trigger 5 may be respectively a groove, a rib, a projection or a groove; and vice versa .

Le déplacement de la détente 5 peut être sensiblement rectiligne. Dans ce cas, le guide 21 et les moyens de guidage sont également rectilignes. Ceci permet un geste simple pour démonter la détente 5. Par exemple, une simple translation de la détente 5 est nécessaire.The displacement of the trigger 5 can be substantially straight. In this case, the guide 21 and the guide means are also rectilinear. This allows a simple gesture to disassemble the trigger 5 . For example, a simple translation of the trigger 5 is necessary.

L'outil à main 1 peut comprendre en outre une lance 8 démontable comprenant des moyens de coopération avec le carter 2 pour son montage et démontage sur le carter 2, par exemple par complémentarité de forme. La lance 8 comprend une butée 82 qui, au contact de la détente 5, empêche celle-ci d'être dissociée d'avec le carter 2. La butée 82 peut être un doigt radial.The hand tool 1 may further comprise a removable lance 8 comprising means for cooperation with the casing 2 for its assembly and disassembly on the casing 2 , for example by complementarity of form. The lance 8 comprises a stop 82 which, in contact with the trigger 5 , prevents it from being dissociated from the casing 2. The stop 82 may be a radial finger.

La lance 8 délimite un espace dans lequel la flamme produite par le brûleur 3 est contenue. La lance 8 peut également délimiter un espace dans lequel de l'air est chauffé par la flamme produite par le brûleur 3.The lance 8 defines a space in which the flame produced by the burner 3 is contained. The lance 8 may also delimit a space in which air is heated by the flame produced by the burner 3 .

L'outil à main 1 peut comprendre alors un ou deux éléments permettant la délimitation du mouvement de la détente 5 pour éviter sa dissociation d'avec le carter 2 quand l'utilisateur ne le souhaite pas : d'une part il y a la saillie 23 faisant office de point dur et d'autre part il y a la butée 82 de la lance 8.The hand tool 1 may then comprise one or two elements allowing the delimitation of the movement of the trigger 5 to prevent its dissociation from the casing 2 when the user does not wish: on the one hand there is the protrusion 23 acting as hard point and secondly there is the stop 82 of the lance 8 .

Exemple de démontage de l'ensemble détente-allumeur piézoélectriqueExample of disassembly of the piezoelectric detonator / detonator assembly

La figure 1 représente un outil à main 1, par exemple une lampe à souder, avec l'ensemble 5-7a détente-allumeur piézoélectrique monté sur le carter 2. Dans cette configuration, la butée 82 de la lance 8 empêche l'ensemble 5-7a d'être dissocié du carter 2.The figure 1 represents a hand tool 1 , for example a welding lamp, with the set 5-7a piezoelectric detonator -lighter mounted on the casing 2 . In this configuration, the stop 82 of the lance 8 prevents the assembly 5-7a from being dissociated from the casing 2 .

Pour dissocier ou démonter cet ensemble 5-7a détente-allumeur piézoélectrique, l'utilisateur doit tout d'abord démonter la lance 8 du carter, par exemple avec un quart de tour comme indiqué par la flèche F1.To disassemble or disassemble this set 5-7a piezoelectric trigger-igniter, the user must first dismount the lance 8 of the housing, for example with a quarter turn as indicated by the arrow F1 .

Pour d'autres outils, il se peut que la lance 8 soit absente, auquel cas cette étape n'a pas lieu d'être.For other tools, the spear 8 may be missing, in which case this step is not necessary.

Une fois la lance 8 démontée, il suffit, pour dissocier l'ensemble 5-7a, de l'extraire suivant un mouvement rectiligne comme indiqué par la flèche F2, c'est-à-dire suivant le sens Se éloignant l'allumeur 7a piézoélectrique de la butée 6 d'allumage, comme illustré sur la figure 2.Once the lance 8 disassembled, it is sufficient to dissociate all 5-7a, to extract a rectilinear movement as indicated by arrow F2, that is to say in the direction away from the igniter 7a piezoelectric of the ignition stop 6 , as shown in FIG. figure 2 .

Lors de ce mouvement rectiligne suivant la flèche F2, les boutons 54 de guidage se déplacent le long des ensembles 24 internes de guidage, jusqu'à venir au contact des saillies 23 de blocage.During this rectilinear movement along the arrow F2 , the guide buttons 54 move along the sets 24 internal guiding, until coming into contact with the protrusions 23 blocking.

L'utilisateur doit alors exercer une contrainte additionnelle sur la détente 5 dans le sens de la flèche F2. Cette contrainte additionnelle est transmise aux boutons 54 de guidage qui franchissent les saillies 23 de blocage vers l'embouchure 22e suite à une déformation élastique soit des boutons 54 de guidage, soit des saillies 23 de blocages, soit de tous.The user must then exert an additional stress on the trigger 5 in the direction of the arrow F2 . This additional constraint is transmitted to the guiding buttons 54 which pass through the locking protrusions 23 towards the mouth 22e following an elastic deformation either of the guiding buttons 54 , or the projections 23 of blockages, or of all.

Il est possible de prévoir un outil à main dans lequel, lorsque la détente est en position de repos, les boutons 54 de guidage sont déjà au contact des saillies 23 de blocage. Auquel cas, il n'est pas besoin de translater les boutons 54 de guidage dans le sens de la flèche F2 au préalable.It is possible to provide a hand tool in which, when the trigger is in the rest position, the guiding buttons 54 are already in contact with the protrusions 23 blocking. In which case, it is not necessary to translate the buttons 54 guide in the direction of the arrow F2 beforehand.

Il est possible de ne prévoir que cette étape nécessaire à la dissociation de l'ensemble 5-7a détente-allumeur piézoélectrique. C'est-à-dire qu'une fois les boutons 54 de guidage passés par-dessus les saillies 23 de blocage vers la partie manche 22m de l'orifice 22 recevant la détente 5, l'ensemble 5-7a détente-allumeur piézoélectrique est dissocié d'avec le carter 2.It is possible to provide only this step necessary for the dissociation of the 5-7a piezoelectric trigger-igniter assembly. That is to say that once the guide buttons 54 passed over the projections 23 to lock the handle portion 22m of the hole 22 receiving the trigger 5, the relaxation-5-7a piezoelectric igniter assembly is dissociated from the casing 2 .

Dans d'autre cas, par exemple pour des raisons d'encombrement de l'outil à main 1, la construction de l'outil à main 1 nécessite qu'une fois que les boutons 54 de guidage aient franchi les saillies 23 de blocage vers la partie manche 22m de l'orifice 22 recevant la détente 5, l'ensemble 5-7a détente-allumeur piézoélectrique doit être pivoté suivant la flèche F3 pour pouvoir extraire l'ensemble 5-7a détente-allumeur piézoélectrique, comme illustré sur la figure 3.In other cases, for example for reasons of bulk of the hand tool 1 , the construction of the hand tool 1 requires that once the guiding buttons 54 have passed the projections 23 blocking to the sleeve portion 22m of the orifice 22 receiving the trigger 5 , the set 5-7a piezoelectric trigger-igniter must be pivoted along the arrow F3 to be able to extract the set 5-7a piezoelectric trigger-igniter, as illustrated on the figure 3 .

En effet, ce mouvement peut être nécessaire car un déplacement de l'ensemble 5-7a détente-allumeur piézoélectrique toujours dans le sens de la flèche F2 comme sur la figure 2 peut amener à ce que l'allumeur 7a piézoélectrique vienne en butée contre un autre élément compris dans le carter 2 ou contre le carter 2 lui-même.Indeed, this movement may be necessary because a displacement of the set 5-7a piezoelectric trigger-igniter always in the direction of arrow F2 as on the figure 2 can cause that the piezoelectric igniter 7a abuts against another element included in the housing 2 or against the housing 2 itself.

Par exemple, dans le cas illustré sur la figure 3, ce mouvement de pivotement est nécessaire parce que l'allumeur 7a piézoélectrique entre en butée contre l'élément 4 électriquement conducteur.For example, in the case illustrated on the figure 3 this pivoting movement is necessary because the piezoelectric igniter 7a abuts against the electrically conductive element 4 .

Enfin, un déplacement de l'ensemble 5-7a détente-allumeur piézoélectrique suivant la flèche F4 permet de terminer l'extraction de l'ensemble 5-7a détente-allumeur piézoélectrique du carter 2, comme illustré sur la figure 4.Finally, a displacement of the 5-7a piezoelectric detonator - detonator assembly along the arrow F4 makes it possible to complete the extraction of the piezoelectric detent-piezoelectric igniter assembly 5-7a from the casing 2 , as illustrated in FIG. figure 4 .

Le montage de l'ensemble 5-7a détente-allumeur piézoélectrique est effectué suivant les mêmes étapes décrites ci-dessus, dans l'ordre inverse de la dissociation ou du démontage.The assembly of the 5-7a piezoelectric trigger-igniter assembly is performed according to the same steps described above, in the reverse order of disassembly or disassembly.

Détente permettant différents modes de fonctionnementRelaxation allowing different modes of operation

La détente 5 de l'outil à main 1 selon l'invention permet également plusieurs modes de fonctionnement de l'outil à main 1 qui sont décrits ci-après en référence aux figures 6 à 8.The trigger 5 of the hand tool 1 according to the invention also allows several modes of operation of the hand tool 1 which are described hereinafter with reference to Figures 6 to 8 .

Dans le cas d'un outil à main 1 comprenant une lance 8, celle-ci peut comprendre en outre des moyens 83 de coopération avec la détente 5 pour le blocage hors fonctionnement ou le déblocage.In the case of a hand tool 1 comprising a lance 8 , the latter may further comprise means 83 for cooperation with the trigger 5 for blocking out of operation or unlocking.

Les moyens 83 de coopération empêchent, en blocage hors fonctionnement, le déplacement de la détente 5 vers la butée d'allumage.The means 83 of cooperation prevent, in off-operation blocking, the displacement of the trigger 5 towards the ignition stop.

En déblocage, ils permettent le déplacement de la détente 5 vers la butée d'allumage pour mettre celle-ci et l'allumeur 7a piézoélectrique en contact.In release, they allow the displacement of the trigger 5 to the ignition stop to put it and the igniter 7a piezoelectric contact.

Par exemple, comme illustré sur les figures 6 à 8, les moyens 83 de coopération de la lance 8 sont un anneau 83 rotatif selon l'axe L-L (voir figure 1) de la lance 8. La section de l'anneau 83 présente une partie 831 de blocage et une partie 832 de déblocage. La partie 831 de blocage s'étend radialement au-delà de la partie 832 de déblocage et sur une portion angulaire limitée pour entrer en butée avec un coin 59 de blocage solidaire de la détente 5 en mode blocage hors fonctionnement.For example, as illustrated on Figures 6 to 8 , the means 83 for cooperation of the lance 8 are a rotary ring 83 along the axis LL (see FIG. figure 1 ) of the spear 8 . The section of the ring 83 has a locking portion 831 and an unlocking portion 832 . The blocking portion 831 extends radially beyond the unlocking portion 832 and over a limited angular portion to abut with a locking wedge 59 integral with the detent 5 in the off-lock mode.

La rotation de l'anneau 83 permet de passer du mode blocage hors fonctionnement (figure 6) au mode déblocage (ou fonctionnement, figures 7 et 8). C'est-à-dire que la rotation de l'anneau 83 permet de positionner soit la partie 831 de blocage devant le coin 59 de blocage de la détente 5 empêchant ainsi un mouvement de la détente 5 suivant le sens Sa (voir figure 1) d'actionnement ; soit la partie 832 de déblocage face au coin 59 de blocage de la détente 5 libérant ainsi le mouvement de la détente 5 suivant le sens Sa d'actionnement.The rotation of the ring 83 makes it possible to switch from the non-operating blocking mode ( figure 6 ) in the unlock mode (or operation, Figures 7 and 8 ). That is to say, the rotation of the ring 83 makes it possible to position either the locking portion 831 in front of the wedge 59 for locking the trigger 5 thus preventing movement of the trigger 5 along the direction Sa (see figure 1 ) actuation; either the unlocking portion 832 facing the locking wedge 59 of the trigger 5 thus releasing the movement of the trigger 5 in the Sa direction of actuation.

Le carter 2 peut également comprendre un coin 26 d'arrêt et la détente 5 un élément 56 de verrouillage en fonctionnement, une partie 57 d'actionnement instantané pour un fonctionnement instantané de l'outil à main 1 (figure 7) et une partie 58 d'actionnement en verrouillage pour un fonctionnement en verrouillage de l'outil à main 1 (figure 8).The casing 2 may also comprise a stop wedge 26 and the detent 5 a locking element 56 in operation, an instantaneous actuating portion 57 for instantaneous operation of the hand tool 1 ( figure 7 ) and a locking actuation portion 58 for locking operation of the hand tool 1 ( figure 8 ).

Lorsque la détente 5 est associée au carter 2, l'élément 56 de verrouillage est positionné au-dessus du coin 26 d'arrêt suivant une direction perpendiculaire à la direction D-D de déplacement de la détente 5.When the trigger 5 is associated with the casing 2 , the locking element 56 is positioned above the stop wedge 26 in a direction perpendicular to the displacement direction DD of the trigger 5 .

La partie 57 d'actionnement instantané est adaptée pour que lorsque l'utilisateur exerce une pression sur celle-ci, puis relâche la pression, l'élément 56 de verrouillage se déplace suivant la direction D-D de déplacement de la détente 5, et ne rencontre jamais le coin 26 d'arrêt. Un gaz de combustion est alors libéré au niveau du brûleur 3 pendant l'instant compris entre le moment où la partie 57 d'actionnement instantané est enfoncée et le moment où elle est relâchée. Lorsque l'utilisateur exerce une pression sur la partie 57 d'actionnement, la détente 5 s'enfonce dans le carter 2, par exemple dans le sens Sa (figure 1). Lorsque l'utilisateur relâche la pression, la détente 5 revient à sa position initiale d'avant pression grâce à l'action de l'élément résilient de rappel de la détente 5, par exemple la détente 5 se déplace dans le sens Se (figure 1).The portion 57 of instantaneous operation is adapted so that when the user exerts a pressure on it, then releases the pressure, the locking element 56 moves in the direction DD of displacement of the trigger 5 , and never meets the 26 stop wedge. A combustion gas is then released at the burner 3 for the time between the moment when the instantaneous actuation portion 57 is depressed and the moment when it is released. When the user exerts pressure on the actuating portion 57 , the trigger 5 sinks into the casing 2 , for example in the direction Sa ( figure 1 ). When the user releases the pressure, the trigger 5 returns to its initial position from before pressure by the action of the resilient element for returning the trigger 5 , for example the trigger 5 moves in the direction Se ( figure 1 ).

La partie 58 d'actionnement en verrouillage est adaptée pour que lorsque l'utilisateur exerce une pression sur celle-ci, l'élément 56 de verrouillage se déplace dans le sens Sa d'actionnement, et vers le bas. Quand l'utilisateur relâche la pression sur la partie 58 d'actionnement en verrouillage, l'élément 56 de verrouillage se déplace dans le sens Se opposé au sens Sa, grâce à l'action de l'élément résilient de rappel de la détente 5, et vient au contact du coin 26 d'arrêt verrouillant ainsi l'outil à main 1 en fonctionnement. Lorsque l'utilisateur exerce la pression sur la partie 58 d'actionnement en verrouillage, la détente 5 s'enfonce dans le carter 2. Lorsque l'utilisateur relâche la pression sur la partie 58 d'actionnement en verrouillage, la détente 5 reste verrouillée dans une position enfoncée.The locking actuation portion 58 is adapted so that when the user exerts pressure thereon, the locking member 56 moves in the operating direction Sa , and downwardly. When the user releases the pressure on the locking portion 58 of actuation, the locking member 56 moves in the direction opposed to the direction Sa, thanks to the action of the resilient member for returning the trigger 5 and comes into contact with the stop wedge 26 thus locking the hand tool 1 in operation. When the user exerts pressure on the locking actuation portion 58 , the trigger 5 sinks into the casing 2 . When the user releases the pressure on the locking actuation portion 58 , the trigger 5 remains locked in a depressed position.

Afin de déverrouiller la détente 5, l'utilisateur exerce alors une pression sur la partie 57 d'actionnement instantané qui déplace l'élément 56 de verrouillage loin du coin 26 d'arrêt dans le sens Ra d'actionnement et vers le haut. La détente 5 revient alors à sa position initiale par action de l'élément résilient de rappel de la détente 5. En variante, un bouton poussoir est prévu sur l'outil à main 1 et adapté pour déplacer l'élément 56 de verrouillage hors du coin 26 d'arrêt, ce bouton poussoir déplace l'élément 56 de verrouillage loin du coin 26 d'arrêt dans le sens Ra d'actionnement et vers le haut. L'utilisateur n'aura qu'à presser sur ce bouton pour faire revenir la détente 5 à sa position initiale.In order to unlock the trigger 5 , the user then exerts pressure on the instantaneous actuating portion 57 which moves the locking member 56 away from the stop wedge 26 in the operating direction Ra and upwardly. Relaxation 5 then returns to his initial position by action of the resilient element for returning the trigger 5. Alternatively, a push button is provided on the hand tool 1 and adapted to move the locking element 56 out of the wedge 26 stop, this push button moves the locking member 56 away from the stop wedge 26 in the operating direction Ra and upwardly. The user will only have to press this button to return the trigger 5 to its initial position.

Ainsi l'utilisateur n'est pas obligé de maintenir la détente 5 lors d'une utilisation prolongée de l'outil à main 1. De plus, le fait que les modes d'utilisation en actionnement instantané ou en verrouillage puissent être sélectionnés en exerçant une pression sur des parties différentes de la détente 5 permet à l'utilisateur de passer d'un mode à l'autre facilement.Thus the user is not obliged to maintain the trigger 5 during prolonged use of the hand tool 1 . In addition, the fact that the modes of use in instantaneous operation or in locking can be selected by exerting pressure on different parts of the trigger 5 allows the user to switch from one mode to another easily.

Aussi, l'utilisateur n'a-t-il besoin que d'une main et d'un seul mouvement pour pouvoir utiliser l'outil à main 1 en mode actionnement en verrouillage.Also, the user only needs one hand and one movement to be able to use the hand tool 1 in lock-up operation mode.

Dans un exemple particulier d'outil à main 1, la rainure 24 est parallèle à la direction D-D de déplacement de la détente 5.In a particular example of a hand tool 1 , the groove 24 is parallel to the direction DD of displacement of the trigger 5 .

La partie 57 d'actionnement instantané est située face à la rainure 24. Ainsi, lorsque l'utilisateur exerce une pression sur cette partie 57 d'actionnement instantané, la détente effectue une simple translation suivant la direction D-D, de même que l'élément 56 de verrouillage.The instantaneous actuating portion 57 is located opposite the groove 24 . Thus, when the user exerts pressure on this portion 57 of instantaneous actuation, the trigger performs a simple translation in the direction DD , as well as the locking element 56 .

La partie 58 d'actionnement en verrouillage est située de manière à ce qu'une ligne imaginaire reliant la partie 58 d'actionnement en verrouillage et le bouton 24 forme un angle avec la rainure 24. Ainsi, lorsque l'utilisateur exerce une pression sur cette partie 58 d'actionnement en verrouillage, le bouton 24 sert de pivot au mouvement de pivotement ; l'élément 56 de verrouillage se déplace vers le bas.The locking actuation portion 58 is located such that an imaginary line connecting the locking actuating portion 58 and the knob 24 forms an angle with the groove 24 . Thus, when the user exerts pressure on this locking actuation portion 58 , the button 24 serves as a pivot to the pivoting movement; the locking element 56 moves downwards.

Claims (9)

  1. A hand tool (1) with an incorporated burner (3) comprising:
    - a casing (2);
    - a burner (3) housed in the casing (2) and connected to an electrically conducting component (4);
    - a trigger (5) mounted on the casing and movable along a direction (D-D);
    - an ignition abutment (6); and
    - a piezoelectric igniter (7a);
    wherein the trigger (5) comprises an open actuation housing (51) receiving the piezoelectric igniter (7a), said actuation housing (51) having an open end facing the ignition abutment (6) so that the piezoelectric igniter (7a) is placed facing the ignition abutment (6) and that a displacement of the trigger (5) in an actuation direction (Sa) is capable of forcing the piezoelectric igniter (7a) against the ignition abutment (6) for producing a spark at the burner (3) via the electrically conducting component (4);
    the hand tool being characterized in that the trigger (5) and the casing (1) comprise mechanical means (42, 54) with shape complementarity which are separable by elastic deformation, so that the trigger (5) and the piezoelectric igniter (7a) form a take-down unit by separation of the mechanical means from the trigger (5) and the casing (2), the take-down unit being removable from the casing (2) without opening of the casing (2).
  2. The hand tool (1) according to claim 1, wherein the casing (2) comprises a handle (29) and an orifice (22) at the handle (29) receiving the trigger (5); wherein
    the mechanical means with shape complementarity provided on the trigger (5) are at least one guiding knob (54); and wherein
    the mechanical means with shape complementarity provided on the casing (2) comprise at least one inner groove (24) at the handle (29) and opening onto the orifice (22) receiving the trigger (5), at a mouth (22e), and a blocking protrusion (24) in the groove (24) and near the orifice (22);
    the guiding knob (54) being located in the inner groove (24) on the side opposite to the mouth (22e) relatively to the protrusion (24);
    the knob (54) and the protrusion (23) being adapted to elastically cooperate so that a stress exerted on the knob (54) towards the protrusion (24) enables separation of the trigger (5) from the casing (2).
  3. The hand tool (1) according to one of claims 1 to 2, wherein the trigger (5) further comprises a reserve housing (52) in order to receive a second piezoelectric igniter (7b).
  4. The hand tool (1) according to one of claims 1 to 3, wherein:
    - the casing (2) comprises a barrel (28) and at least one guide (21) at the barrel (28) for guiding the trigger (5) in its displacement;
    - the trigger (5) comprises guide means for cooperating with the guide (21) of the casing (2);
    a displacement in the actuation direction (Sa) along the guide (21) bringing the piezoelectric igniter (7a) closer to the ignition abutment (6), and
    a displacement in a direction (Se) opposite to the actuation direction (Sa) along the guide (21) being capable of enabling the trigger (5) to be separated from the casing (2).
  5. The hand tool (1) according to one of claims 1 to 4, further comprising a removable lance (8) comprising means for cooperating with the casing (2) for its assembling and disassembling onto the casing (2); and
    wherein the lance (8) also comprises an abutment (82) which, upon contact with the trigger (5), prevents the latter from being separated from the casing (2).
  6. The hand tool (1) according to claim 5, wherein the lance (8) further comprises means (83) for cooperating with the trigger (5) for locking when it is not operating or unlocking the latter, wherein the cooperating means (83):
    - prevent, upon locking when in an inoperative mode, the displacement of the trigger (5) in the actuation direction (Sa) by mechanical abutment; and
    - release, during unlocking, the displacement of the trigger (5) in the actuation direction (Sa) for bringing the ignition abutment (6) and the piezoelectric igniter (7a) into contact.
  7. The hand tool (1) according to claim 6, wherein the cooperating means (83) of the lance (8) are a ring (83) pivotable about the axis (L-L) of the lance (8), and the section of which has a blocking portion (831) and an unblocking portion (832), the blocking portion (831) extending radially beyond the unblocking portion (832) on a fraction of the ring less than 360° so as to come into abutment with a blocking wedge (59) provided on the trigger (5) during locking.
  8. The hand tool (1) according to one of claims 1 to 7, wherein the casing (2) comprises a stopping wedge (26), the trigger (5) comprises an operating lock component (56), an instantaneous actuation portion (57) for instantaneous operation of the hand tool (1) and a locking actuation portion (58) for a locking operation of the hand tool (1),
    the actuation of the instantaneous actuation portion (57) driving the lock component (56) into motion along the direction (D-D) of displacement of the trigger (5); and
    the locking of the actuation portion (58) driving the lock component (56) into motion towards the stopping wedge (26), and thereby locking the hand tool (1) in an operative state.
  9. The hand tool (1) according to claim 8 in combination with claim 3, wherein the groove (24) is parallel to the direction (D-D) of displacement of the trigger (5); wherein
    the actuation portions (57, 58) are actuated by pressure thereon; wherein
    the instantaneous actuation portion (57) is located facing to the groove (24); and wherein
    the locking actuation portion (58) is located so that an imaginary line connecting the locking actuation portion (58) and the knob (24) forms an angle with the groove (24).
EP10163806.2A 2009-05-25 2010-05-25 Handtool with incorporated burner and removable piezoelectric ignitor assembly Active EP2264366B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0953423A FR2945853B1 (en) 2009-05-25 2009-05-25 HAND TOOL WITH INCORPORATED BURNER AND DETACHABLE PIEZOELECTRIC IGNITION ASSEMBLY.

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EP2264366A2 EP2264366A2 (en) 2010-12-22
EP2264366A3 EP2264366A3 (en) 2014-06-11
EP2264366B1 true EP2264366B1 (en) 2017-07-05

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US (1) US8556623B2 (en)
EP (1) EP2264366B1 (en)
CN (1) CN101900337B (en)
CA (1) CA2704140C (en)
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Also Published As

Publication number Publication date
US8556623B2 (en) 2013-10-15
US20100297567A1 (en) 2010-11-25
EP2264366A3 (en) 2014-06-11
EP2264366A2 (en) 2010-12-22
FR2945853B1 (en) 2013-02-15
CN101900337B (en) 2014-07-30
CA2704140C (en) 2017-11-07
CA2704140A1 (en) 2010-11-25
CN101900337A (en) 2010-12-01
FR2945853A1 (en) 2010-11-26

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