Improved adjustable plastering knife handle and plastering knife with such a handle.

Abstract

The invention relates to a plastering knife handle (100) made of a profile comprising two profiles movable relative to each other: • a first gripping profile (10) • a second handling profile (20) the profiles being locked relative to each other in rotation and translation, comprising a guide flange (31) fixed by fastening means (32) to one of the first or second profiles (10, 20) and provided with a positioning member (33) engaging with a switchable indexing means (34) carried by the other of the first or second profiles to hold the first and second profiles in the working position, or to allow relative rotation of the first and second profiles. Figure for the abstract: Fig. 3

Description

Title of the invention: Improved adjustable plastering knife handle and plastering knife equipped with such a handle.

[0001] The invention relates to an improved adjustable plastering knife handle and to a plastering knife equipped with such a handle.

[0002] Conventional plastering knives have a cylindrical handle attached to a blade substantially perpendicular to the free edge of the blade. In this case, the handle is gripped "with the whole hand", that is to say, the fingers and thumb wrap in opposite directions around the handle.

[0003] Then the blade is applied forcefully against a surface to apply and smooth the plaster. The blade must be flexible enough to bend in order to apply the plaster without scraping it off the face and rigid enough to press the plaster against the surface.

[0004] With this type of plastering knife, the user can hold the handle very firmly without fatigue, but the application of the plaster is not uniform over the entire width of the blade, especially if one has a wide blade (greater than 25 cm).

[0005] An improvement consists of fixing a handle parallel to the blade.

[0006] Documents DE1845335 and EP2137364 propose a handle with a gripping part and a levering part.

[0007] Although these handles gave satisfaction for a long time, it was found that their grip was still not entirely satisfactory during use.

[0008] Thus, as use progresses, the hand tends to become tetanic and the user must stop working to rest.

[0009] The present applicant has thus proposed in patent FR3101903 a notable improvement of the previous plastering knife, by providing a gripping part adjustable in angular position relative to the plane of the blade.

[0010] The handle of the plastering knife is profiled and extends along a longitudinal direction parallel to the free edge of the blade in the position of use.

[0011] The handle comprises two profiles that are movable relative to each other in a sliding and rotating manner: • a first gripping profile comprising a portion for fixing the edge of a plastering blade, connected to a central portion integral with a first gripping portion of a gripping part forming, seen in cross-section, an open hook having an inner surface in the shape of an arc of a circle, • a second lever profile constituting a second lever portion of the gripping part and comprising, seen in cross-section, a cylinder having an outer surface in the form of an arc of a circle complementary to the inner surface in the form of an arc of a circle of the first portion, the cylinder being integral with an oblong lever body, seen in cross-section, intended to receive the palm, thumb and fingers of the user's hand.

[0012] The plastering knife handle also includes means for locking one profile against rotation relative to the other in at least two different angular positions.

[0013] In this patent, the locking means described and illustrated consists of complementary reliefs on the outer surface of the lever portion's cylinder and on the inner surface of the grip portion. These reliefs are grooves spaced angularly to define different angular positions of the lever profile relative to the grip profile.

[0014] While this embodiment is economical and easy to manufacture, it has proven difficult to use due to predefined angular positions, handling and the risk of fouling when changing position, the two profiles being removed from each other, pivoted and then reinserted into each other.

[0015] The objective of the present invention is therefore to offer an improved adjustable handle, that is to say easy to adjust in position, without risk of fouling, adapting to the greatest number of users, while being economical and lightweight.

[0016] To achieve this, the invention provides external locking and rotation guidance means which do not require separating the profiles from the handle to modify the relative position of the profiles.

[0017] The invention more specifically relates to a plastering knife handle in profile extending along a longitudinal direction and comprising two profiles movable relative to each other in a sliding manner along the longitudinal direction, and rotating around the longitudinal direction, in which: • a first gripping profile comprises a portion for fixing an edge of a plastering blade, connected to a central portion integral with a first gripping portion of a gripping part forming, seen in cross-section, an open hook having an inner surface in the shape of an arc of a circle, • a second handling profile comprises, in cross-section, a cylinder having an outer surface in the form of an arc of a circle complementary to the inner surface in the form of an arc of a circle of the first portion, the cylinder being integral either with an oblong lever body, in cross-section, intended to receive the palm, thumb and fingers of the user's hand, or with a handle fixing element: the first and second profiles being locked relative to each other in rotation and translation by means of reversible locking in rotation.

[0018] According to the invention, the inner arc-shaped surface of the hook and the outer arc-shaped surface of the cylinder are smooth, and the reversible rotation locking means comprise a guide flange fixed by fastening means to one of the first or second profiles and provided with a positioning member in contact with a deactivatable indexing means carried by the other of the first or second profile to maintain the first and second profiles in the position of use, or to allow relative rotation of the first and second profiles.

[0019] By allowing the user to easily adjust the angle of the gripping part preferably continuously between two extreme positions, the handle according to the invention makes the application of coating easier, less tiring, and adapted to the morphology of any user and / or the orientation of the coated surface.

[0020] According to particular embodiments: • the positioning element may be an oblong light and the deactivatable indexing means may be a knurled screw engaged in the oblong light and intended to be screwed into a screw thread carried by the other of the first or second profile to hold the first and second profiles in the position of use, or unscrewed to allow relative rotation of the first and second profiles; • the positioning element can be a series of through holes aligned in an arc of a circle and the deactivatable indexing means is either a knurled screw or a pin mounted elastically between a locking position engaged in one of the holes to hold the first and second profiles in the position of use and a retracted position to allow relative rotation of the first and second profiles; • the flange can be fixed to the second handling profile and the thread of the knurled screw can be carried by the first gripping profile; • the first and second profiles may each include a cover at each end, one of the covers being engaged with the means of fixing the flange to the profile concerned; • the profile to one end of which the flange is fixed may have a cover at the other end, the flange having a part of a shape complementary to a section of the profile to serve as a cover; and / or • the oblong lever body may include a curved protective tab extending over part of the cylinder and providing, between the cylinder and the tab, a sliding guide groove for a free end of the open hook.

[0021] The invention also relates to a plastering knife comprising a handle of the previous plastering knife, and a plastering application blade.

[0022] The invention also relates to a plastering knife kit, comprising a previous plastering knife handle, at least one plastering application blade, and a plurality of second handling profiles of different oblong lever body shapes and / or different handle attachment elements.

[0023] The invention also relates to an assembly comprising a previous handle and a part for attaching an extension handle to this handle, the part for attaching having a shape complementary to the gripping areas and the oblong lever body of the handle so as to be able to be attached to the handle.

[0024] The preceding assembly may also include an extension handle equipped with said fixing part.

[0025] Other features of the invention will be set forth in the detailed description below, made with reference to the accompanying figures, given by way of example, and which represent, respectively:

[0026] [Fig. 1], a schematic perspective view of a first embodiment of a coating knife handle according to the invention comprising a rotation guide / locking terminal flange;

[0027] [Fig.2], a schematic cross-sectional view of a coating knife handle of the [Fig.1] along the cutting line II-II, and showing the fixing elements of the rotation guide / locking flange;

[0028] [Fig.3], a schematic exploded perspective view of the first embodiment of [Fig.1] in which the handle includes a cover between the guide / locking flange and at least one of the profiles;

[0029] [Fig.4], a schematic exploded perspective view of a second embodiment the guide / locking flange acts as a cover for at least one of the profiles.

[0030] [Fig.5], a schematic perspective view of the handle of the [Fig.1] in which the second handling profile is in the lower position;

[0031] [Fig.6], a schematic perspective view of the handle of the [Fig.1] in which the second handling profile is in the high position;

[0032] [Fig.7], a schematic profile view of the handle of [Fig.1] showing the hand in a grip with the entire gripping part in a first locking position;

[0033] [Fig.8], a schematic profile view of the handle of [Fig.1] showing the hand in a grip with the entire gripping part in a second locking position;

[0034] [Fig.9], a schematic profile view of a third embodiment of a plastering knife handle according to the invention in a low position and comprising a rotation guide / locking terminal flange equipped with a means for returning the second profile to the rest position;

[0035] [Fig. 10], a schematic profile view of the third embodiment in an intermediate position in which the return means of the second profile is in an intermediate extension position;

[0036] [Fig. 11], a schematic profile view of the third embodiment in the high position in which the return means of the second profile is in the maximum extension position;

[0037] [Fig. 12], a schematic profile view of a plastering knife handle according to the invention, the second handling profile of which comprises an oblong lever body equipped with a first variant of a means for fixing an extension handle;

[0038] [Fig. 13], a schematic profile view of a plastering knife handle according to the invention in contact with a fastening part added to an extension handle;

[0039] [Fig. 14], a schematic profile view of a plastering knife handle according to the invention, the second handling profile of which comprises a cylinder integral with a handle fastening element; and

[0040] [Fig. 15], a schematic profile view of a plastering knife handle according to the invention, the second handling profile of which comprises an oblong lever body equipped with a second variant of a means for attaching an extension handle.

[0041] By convention, in the remainder of this description, the so-called "upper" elements are those located towards the top of the handle of the [Fig.2], the so-called "front" or "distal" elements are those located towards the right of the handle of the [Fig.2], i.e. towards the blade and away from the user, the so-called "rear" or "proximal" elements are those located towards the left of the handle of the [Fig.2], i.e. opposite the blade and towards the user, and the so-called "lower" elements are those located towards the bottom of the handle of the [Fig.2].

[0042] Also by convention, a "curve" is understood to mean a surface formed by an arc of a circle.

[0043] With reference to figures 1 and 2, a handle 100 of a plastering knife according to the present invention comprises two profiles 10-20 extending along a longitudinal direction L. The two profiles 10-20 are mounted to move relative to each other in a sliding and rotating manner and the rotational movement is guided and reversibly blocked by reversible rotation blocking means 30.

[0044] The handle 100 comprises, in profile view, a gripping part 110 connected by a central part 120 to a fixing part 130 of an edge of a plastering blade 200. In other words, the handle is attached to the 200 blade in a manner substantially parallel to the free edge of the blade.

[0045] According to the invention, the gripping part is in two portions pivotable and detachable relative to each other, a first gripping portion 111 carried by the first profile 10, a second manipulation portion being constituted by the second manipulation profile 20.

[0046] More particularly, the first gripping profile 10 includes the fixing portion 130 of the coating blade 200, which is connected to the central portion 120. The latter is integral with the first gripping portion 111 of the gripping part 110 forming, seen in cross-section, an open hook having an inner surface in an arc of a circle 11la, and a free end 111b.

[0047] According to the invention, the first grip portion 111 has a convex curved outer surface 111c called the "front grip" against which the user's fingertips can bend, allowing them to pull the plastering knife during use.

[0048] The second handling profile 20, constituting a second handling portion of the gripping part 110, comprises, in cross-section, a cylinder 21 having an outer surface in the shape of a circular arc 21a complementary to the inner surface in the shape of a circular arc 11la of the first gripping portion 111.

[0049] According to the invention, the inner surface 11la and the outer surface 21a in arc of a circle are smooth, that is to say they are devoid of any relief, such as a groove or a channel, which would prevent a rotation of the profiles with each other when they are engaged.

[0050] The open hook 111 has a C shape over at least 200°, preferably over at least 240°, provided that it is open over at least 45°, which ensures that the cylinder 21 can only exit the hook 111 laterally, by sliding along the longitudinal direction L.

[0051] In Figures 1 and 2, which illustrate the handle in its configuration that can be grasped by a user, the cylinder 21 is integral with an oblong lever body 22, seen in cross-section, intended to receive the palm, thumb, and fingers of the user's hand (see Figures 7 and 8). The oblong body is arranged in a proximal position relative to the cylinder, that is to say, it is closer to the user than the cylinder.

[0052] The oblong body 22 has, in cross-section, an upper face 22a intended to receive the palm and fingers of the user's hand, the upper face 22a being connected, by a rear support face 22c intended to rest in the hollow of the hand located between the thumb and index finger, to a lower lever face 22b located below the upper face 22a and against which the user's thumb can be pressed to allow the user to perform a levering movement with their thumb.

[0053] The oblong lever body preferably includes a curved protective tab 22d extending over a portion of the cylinder 21 and providing, between the cylinder 21 and the tab 22d, a sliding guide groove 23 for a free end 111b of the open hook 111. The curved protective tab 22d protects the sliding guide groove regardless of the angular position of the lever portion 20, and prevents coating from becoming lodged in the groove 23.

[0054] The handle according to the invention also includes reversible rotational locking means 30 of one profile relative to the other in a multitude of different angular positions, preferably continuously between two extreme positions, referred to as "low" and "high".

[0055] According to the invention, these reversible rotation locking means 30 comprise a guide flange 31 fixed by fastening means 32 to one of the first or second profiles (in figures 1 to 4: the second profile 20) and provided with a positioning member 33 in contact with a deactivatable indexing means 34-35 carried by the other of the first or second profile (in figures 1 to 4: the first profile 10) to maintain the first and second profiles in the position of use, or to allow a relative rotation of the first and second profiles.

[0056] The positioning member 33 can advantageously be either a continuous curved oblong light 33 or a series of through orifices aligned in an arc of a circle.

[0057] If the positioning member is a series of orifices, the indexing means can be either a knurled screw which must be completely removed and then screwed back in to move from one orifice to another, or a pin mounted elastically between a locking position engaged in the positioning member and a retracted position allowing relative rotation of the first and second profiles until the pin engages in another orifice.

[0058] In the example illustrated in the figures, the positioning member is an oblong slot 33 in which a knurled screw 34 is engaged. The knurled screw 34 is intended to be screwed into a thread 35 carried by the other of the first or second profile (in figures 1 to 4: the first profile 10) to hold the first and second profiles 10-20 in the operating position, or unscrewed to allow relative rotation of the first and second profiles 10-20.

[0059] More specifically, as illustrated in figures 3 and 4, the means for fixing the flange 32 to one of the profiles, here the second profile 20, are advantageously constituted by screws 32a intended to be screwed into the inside of a screw thread 32b carried by the profile, each screw 32a passing through an orifice 32c carried by the flange 31.

[0060] Alternatively, the flange can be fixed in reverse and on the first profile, the reversible locking knob being screwed / unscrewed on the second profile 20. Of course, in this case, the shape of the oblong opening will have to be adapted accordingly to allow the relative rotation of the profiles 10-20.

[0061] Since the 10-20 profiles are generally manufactured by extrusion, they are generally tubular, that is to say, they have hollow parts intended to reduce their weight, and internal reinforcements ensuring the rigidity of the profiles.

[0062] To prevent these empty areas from becoming soiled, particularly by the coating during use, and as partially illustrated in [Fig. 3], the first and second profiles 10-20 each include a cover attached to each end (the covers of the first profile are not shown). In the context of the invention, one of the covers 40 then engages with the fastening means 32 of the flange 31 on the profile in question, here the second handling profile 20. More specifically, the cover 40 has through holes 41 through which the screws 32a for fastening the flange 31 to the profile 20 pass.

[0063] Alternatively, this cover 40 may be absent. Thus, in [Fig. 4], the profile 20, to one end of which the flange 31 is fixed, has no cover 40 at that end and has a cover at the other end. The flange 31 is then shaped to have a portion complementary to the cross-section of the profile in order to seal it tightly and serve as a cover.

[0064] Figures 5 and 6 illustrate the implementation of the exemplary embodiment with an oblong slot in the handle according to the invention, in order to change the angular position between a first extreme "low" position ([Fig. 5]) and a second extreme "high" position ([Fig. 6]). These positions are determined by the length of the oblong slot 33 (or the number of holes in the series in another embodiment) against the ends of which the knurled screw 35 bears against the stop.

[0065] Initially ([Fig. 5]), the knurled screw 34 (arrow Fl) is unscrewed so that its bearing face 34a against the flange 31 is no longer clamped against the flange 31, and the second profile 20 is pivoted (arrow F2) relative to the first profile 10 towards an intermediate position until, possibly as illustrated in [Fig. 6], the opposite extreme position, here the upper position. During this pivoting, the knurled screw slides in the oblong slot 33.

[0066] Then, the knurled screw 34 is screwed back in the direction of arrow F3 so that its bearing face 34a is sufficiently tight against the flange 31 to hold the first and second profiles 10-20 in the position of use, i.e. immobile relative to each other in order to apply the coating.

[0067] To return from the second high or intermediate angular position to the first low angular position or a different intermediate position, one reproduces the same procedure by unscrewing the knurled screw 31, making the desired relative rotation of the first and second profiles 10-20, then tightening the knurled screw 31 to hold the first and second profiles 10-20 relative to each other in the position of use.

[0068] Figures 7 and 8 illustrate the handle according to the invention held in hand, respectively in the first low angular position ([Fig.7]) and in the second high angular position ([Fig.8]).

[0069] Cross-sectional view of the handle, in the first low angular position ([Fig.7]), the oblong body 22 has a median plane PI which, in the first angular position, forms an angle al with a reference plane XX parallel to the blade 200.

[0070] In the second high angular position ([Fig.8]), the median plane PI forms an angle a2 with the reference plane XX parallel to the blade 200, a2 being greater than al.

[0071] In this second position, the hand is more vertical relative to the blade than in the first angular position.

[0072] This second angular position is, for example, well suited to the application of plaster against a ceiling.

[0073] In a preferred embodiment, the oblong body 22 and the rear of the central part 120 have a particularly efficient structure which significantly reduces user fatigue.

[0074] In this embodiment, the general shape of the gripping part 110 and the central part 120 allows the user to grasp it in an embrace, that is to say with the whole hand with the fingers and thumb folded in the direction of the joints.

[0075] This effect is achieved by the presence of a flexed zone in which the user's thumb can bend in the direction of the joint. The implementation is similar to that described in patent FR3101903.

[0076] In doing so, the gripping part 110 allows a powerful grip of the hand which totally embraces this gripping part, all the fingers being bent in the direction of the joints without being in hyperextension.

[0077] Other oblong body shapes are of course possible, as long as the oblong body is attached to a cylinder 21 of complementary shape to the inner surface in arc of a circle 11 la of the first portion 111.

[0078] Figures 9, 10 and 11 illustrate another embodiment in which the knurled screw is not tightened against the flange 31 to prevent relative movement of the profiles 10-20.

[0079] On the contrary, the relative rotation of the profiles 10-20 is free, but limited by the length of the oblong opening, the means of reversible rotation blocking including a means of return, of determined force, in one of the extreme positions, here the low position illustrated in [Fig.9].

[0080] In this embodiment, the return means is a spring 50 of determined stiffness, one end 51 of which is fixed to the flange (for example by one of the screws 32a) and the other end 52 is fixed to the knurled screw 31.

[0081] Thus, when applying or smoothing the plaster, the comfortable angle of the hand changes depending on whether the arm is extended towards the top of the wall or whether it is located towards the bottom of the wall.

[0082] Thanks to the pull-back means 50 which stretches, the two profiles 10-20 can pivot relative to each other during the application or smoothing of the coating.

[0083] Thus [Fig.9] can illustrate the relative position of the two profiles 10-20 when the user's arm is extended up the wall, [Fig. 10] can illustrate the relative position of the two profiles 10-20 when the user's arm is in an intermediate position, and [Fig.11] can illustrate the relative position of the two profiles 10-20 when the user's arm is directed down the wall.

[0084] When the user releases the pressure of the plastering knife against the wall, the two profiles 10-20 return to their initial relative position ([Fig.9]) thanks to the spring 50 which contracts again.

[0085] Advantageously, the return means may include a return braking means, such as a damper.

[0086] Kits can thus be marketed comprising a gripping profile 10, at least one blade, and a plurality of handling profiles 20 of different shapes, the handling profiles 20 being distinguished by the shape of their oblong body, while they have fixing cylinders identical to the first gripping profile. At least one of the oblong bodies can also be distinguished from the others by the presence of a fixing part for an extension handle.

[0087] As illustrated in [Fig. 12], the second handling profile 20 of the handle can include a fixing part 60 of an extension handle 70 on the top of the oblong body 22'.

[0088] Alternatively, as illustrated in [Fig. 13], the second handling profile 20 of the handle may include a fixing part 61 (here a screw thread, for example) of an extension handle 71 at the rear of the oblong body 22”, relative to the position of use.

[0089] In another embodiment illustrated in [Fig. 14], the kit may include a handle 71 connected to a fastening part 71a which has a shape complementary to the gripping and levering areas of the handle to be suitable for being attached to the handle.

[0090] The kit may alternatively include a handling profile 20' attached to a fastening member 25 for receiving a handle 73, this handling profile 20' being without an oblong body. It therefore cannot be gripped by hand and is reserved for use with a handle, which reduces the overall weight.

[0091] In this case, the handling profile 20' has a general T-shaped form whose crossbar is constituted, seen in cross-section, by the cylinder 21' having an outer surface in arc of circle complementary to the inner surface in arc of circle 11 la of the first portion 111 of the first gripping profile 10. The longitudinal bar of the T is constituted by a fixing member 25 intended to receive a handle 73 perpendicular to the cylinder 21'.

[0092] The invention allows the economical manufacture of a plastering knife handle that can be oriented relative to the blade, because the locking and rotational guidance means are brought in from the outside of the handle, and are independent, before assembly, of the profiles.

[0093] Furthermore, these are easier to manufacture because they do not have a groove and therefore do not require very precise assembly. The manufacturing and assembly tolerances are greater.

[0094] Finally, the use of the handle is considerably easier, as it is no longer necessary to separate the profiles to change their relative position. This also allows, optionally, for rotation during movement using a return mechanism.

Claims

Demands

1. A plastering knife handle (100) made of a profile extending along a longitudinal direction and comprising two profiles movable relative to each other by sliding along the longitudinal direction and rotating about the longitudinal direction, wherein: • a first gripping profile (10) comprises a fastening portion (130) for an edge of a plastering blade (200), connected to a central portion (120) integral with a first gripping portion (111) of a gripping part (110) forming, in cross-section, an open hook having an inner arc-shaped surface (Hla), • a second handling profile (20, 20') comprises, in cross-section, a cylinder (21, 21') having an outer arc-shaped surface (21a) complementary to the inner arc-shaped surface (11la) of the first portion (111), the cylinder (21, 21') being integral with either an oblong lever body (22, 22', 22”),cross-sectional view, intended to receive the palm, thumb, and fingers of the user's hand, or a fastening member (25) of a handle (73): the first and second profiles (10-20, 20') being locked relative to each other in rotation and translation by reversible rotation locking means (30), characterized in that the inner arc-shaped surface (111a) of the hook and the outer arc-shaped surface (21a) of the cylinder are smooth, and in that the reversible rotation locking means (30) comprise a guide flange (31) fixed by fastening means (32) to one of the first or second profiles (10, 20, 20') and provided with a positioning member (33) engaging with a deactivatable indexing means (34) carried by the other of the first or second profiles to hold the first and second profiles in the position of use, or to to allow relative rotation of the first and second profiles.

2. Handle (100) of a plastering knife according to claim 1, wherein the positioning member is an oblong slot (33) and the switchable indexing means is a knurled screw (34) engaged in the oblong slot (33) and intended to be screwed into a pitch screw (35) carried by the other of the first or second profiles to hold the first and second profiles in position of use, or unscrewed to allow relative rotation of the first and second profiles.

3. Handle (100) of a plastering knife according to claim 1, wherein the positioning member is a series of through holes aligned in an arc of a circle and the deactivatable indexing means is either a knurled screw or a pin mounted elastically between a locking position engaged in one of the holes to hold the first and second profiles in the operating position and a retracted position to allow relative rotation of the first and second profiles.

4. Handle (100) of a plastering knife according to claim 2, wherein the flange (31) is fixed to the second handling profile (20) and the thread (35) of the knurled screw (34) is carried by the first gripping profile (10).

5. Handle (100) of a plastering knife according to any one of claims 1 to 4, wherein the first and second profiles (10, 20, 20') each comprise a cover (40) at each end, one of the covers being engaged with the means for fixing the flange to the profile concerned.

6. Handle (100) of a plastering knife according to any one of claims 1 to 4, wherein the profile on one end of which the flange (31) is fixed has a cover at another end, the flange having in part a shape complementary to a section of the profile to serve as a cover.

7. Handle (100) of a plastering knife according to any one of claims 1 to 6, wherein the oblong lever body (22, 22', 22") includes a curved protective tab (22d) extending over a portion of the cylinder (21) and providing, between the cylinder and the tab, a sliding guide groove (23) for a free end (111b) of the open hook (111).

8. Plastering knife, characterized in that it comprises a plastering knife handle according to any one of claims 1 to 7, and a plastering application blade (200).

9. Plastering knife kit, characterized in that it comprises a plastering knife handle according to any one of claims 1 to 7, at least one plastering application blade (200), and a plurality of second handling profiles (20, 20') of different oblong lever body shapes and / or different handle (73) fixing members (25).

10. Assembly comprising a handle according to any one of claims 1 to 7 and a part for attaching an extension handle to this handle, characterized in that the part for attaching (72a) has a shape complementary to the gripping areas and the oblong lever body (22) of the handle so as to be able to be attached to the handle.

11. Assembly according to claim 10 comprising an extension handle equipped with said fixing part.

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