FR3127364A1 - Ergonomic secateurs holder - Google Patents

Abstract

The invention relates to a secateur holder (2) comprising a shell (22) provided with a housing capable of holding a secateur (1) suspended. Figure for abstract: Fig. 3

Description

Ergonomic secateurs holder

The invention relates to the field of pruning shears and more specifically relates to a pruning shear holder device.

State of the prior art

A conventional secateur holder typically comprises a flexible or rigid sheath designed to be connected to a belt or vest.

The sheath is generally configured to receive the cutting head of the pruner as well as all or part of its handle so as to prevent accidental removal of the pruner under the action of its own weight. To improve the hold and thus secure the carrying of the shears, it is known to equip the case with a retaining element such as a strap holding the shears by its handle.

The pruning shears known in the state of the prior art make it possible to maintain a pruning shears in an overall satisfactory manner but are not very ergonomic, in particular taking into account their bulk which corresponds overall to the total bulk of the tool, or even more.

The invention aims to provide a secateur holder with better ergonomics.

To this end, the subject of the invention is a secateurs-holder device comprising a shell provided with a housing configured to receive a cutting head of a secateurs. According to the invention, this device is configured to be able to keep the shears suspended when the cutting head is received in the housing of the shell.

Given the suspension of the pruner, the handle of the pruner or more generally the parts of the pruner to which the cutting head is connected are oriented vertically downwards.

This makes it possible, when the device is connected for example to a belt or a vest of a user, to arrange the shears along a leg by freeing up the space for movement of the arms. Such an arrangement facilitates the performance of tasks when the pruner is carried by the device.

This results in improved user comfort and safety since the cutting head is housed in the hull.

In a preferred embodiment, the housing of the shell is configured to receive only the cutting head of the pruner.

This significantly reduces the size of the device and further improves its ergonomics.

The maintenance of the pruning shears thus suspended can be ensured by the geometry of the housing of the shell, having regard in particular to the geometry of the cutting head of the pruning shears, and/or by additional retaining means.

In one embodiment, the device is configured to be able to keep the shears suspended by the cutting head.

Alternatively, the holding by the device of the suspended pruner can be provided by another part of the pruner, for example by a casing of the pruner or by a trigger protection bridge of the pruner.

Thus, in one embodiment, the device comprises a retaining member movable between a first position allowing insertion of the cutting head of the pruner within the housing of the shell, or its removal from this housing, and a second position suitable to prevent removal of the pruning shear cutting head from the housing of the shell.

By way of example, the retaining member may comprise an element such as a latch configured to bear against the cutting head, whether on an external surface of the cutting head or within an orifice made in the cutting head.

In one embodiment, the shell forms at least one abutment surface for the cutter head and the retainer forms at least one other abutment surface for the cutter head.

More specifically, the shell can form at least one abutment surface for a blade of the cutting head and the retainer can form at least one other abutment surface for this blade.

In the context of this embodiment, it is preferred that said blade be a fixed blade of the cutting head.

Holding can also be achieved without additional retaining means.

For example, the retention can be ensured by modifying, after insertion of the cutting head in the housing of the shell, the configuration of the shell and/or the configuration of the cutting head.

Thus, in one embodiment, the shell is configured such that a first blade of the cutting head abuts on a first surface of the shell and a second blade of the cutting head abuts on a second surface of the shell after positioning the cutting head in an open position in which the first blade and the second blade define an opening therebetween.

In other words, the restraint can be achieved by opening, totally or partially, the cutting head of the pruner after its insertion into the housing of the shell.

The device can combine different retaining modes, for example by integrating both a retaining member as defined above and by implementing an additional retainer by opening the cutting head.

In one embodiment, the device comprises a support intended to be connected to an accessory such as a belt or a piece of clothing, the shell being connected to the support according to a connection defining at least one degree of freedom in rotation so as to allow a displacement of the shell between a first position provided to allow insertion of the cutting head of the shears within the housing of the shell, or its removal from this housing, and a second position allowing the shears to be suspended.

Preferably, the device is configured so that, when the cutting head is inserted into the housing of the shell arranged in the first position, the pruner moves the shell under the action of gravity from the first position to the second position. .

This clever combination of features further improves the ergonomics of the device.

Indeed, in the absence of a connection allowing rotation of the shell between two different positions, the suspension of the pruning shears would impose on the user an insertion gesture going vertically from bottom to top and removal from the top. down. The freedom of rotation of the shell makes it possible to define a first position allowing a more natural gesture.

In addition, when the pruner is electric and includes a cable connected to a battery, this cable exerts constraints during the movements of the operator. The degree of rotational freedom allows the device to absorb these stresses when the pruner is kept suspended by the device, which improves operator comfort.

In one embodiment, the device comprises an elastic member configured to return the shell to the first position when the latter does not receive a secateur cutting head.

The invention also relates to an assembly comprising a secateur and a device as defined above.

In one embodiment, the pruner is electric.

According to another aspect, the invention relates to a method for coupling a secateur and a secateur holder device as defined above.

This method preferably comprises a step of inserting a cutting head of the pruner into the housing of the shell of the device.

Other advantages and characteristics of the invention will appear on reading the detailed, non-limiting description which follows.

The following detailed description refers to the attached drawings in which:

is a diagrammatic perspective view of a pruner and a pruner holder according to the invention, the pruner comprising a cutting head being inserted into a shell of the pruner holder;

is a schematic perspective view of the secateurs and the secateurs holder of the , the cutting head of the pruner being housed in the shell of the pruner holder, the shell being in a first position relative to a support of the pruner holder so that the pruner extends vertically upwards;

is a schematic perspective view of the secateurs and the secateurs holder of the , the cutting head of the pruner being housed in the shell of the pruner holder, the shell being in a second position relative to the support of the pruner holder so that the pruner extends vertically downwards while being suspended;

is a schematic view of the shears and the shears holder of the , in the configuration of the in which the cutting head of the pruner is being inserted into the shell of the pruner holder, the showing a housing formed by the shell of the secateur holder;

is a schematic view of the shears and the shears holder of the , in the configuration of the in which the cutting head of the pruner is housed in the shell of the pruner holder, the showing the arrangement of the cutting head of the shears within the housing formed by the shell of the shears holder, the housing matching the contours of a fixed blade of the cutting head;

is a schematic perspective and exploded view of the pruning shears holder of the , showing in particular the support, a torsion spring, a connecting piece, the shell in the form of an internal half-shell and an external half-shell, as well as a retainer;

is a schematic perspective view of the shear holder support of the , showing a hooking lug of the pruning shear holder;

is a schematic perspective view of a centering part of the secateur holder of the ;

is a schematic perspective view of a sub-assembly of the secateur holder of the comprising the internal half-shell and the torsion spring which cooperates with a connecting member formed by this internal half-shell;

is a schematic perspective view of another sub-assembly of the pruning shear holder support of the comprising the support and the centering part which cooperates with a shaft secured to this support;

is a schematic perspective view of an assembly comprising the subassembly of the , the torsion spring and the connection part of the secateurs holder support of the .

Detailed Description of Embodiments

There is shown in Figures 1 to 5 a pruner 1, intended for pruning plants such as shrubs or vines, and a pruning device 2 according to a preferred embodiment of the invention.

The pruner 1 is in this example an electric pruner powered by a battery (not shown) to which the pruner 1 is connected by a flexible cable (not shown).

The pruner 1 comprises a cutting head 4 and a body 6.

In a manner known per se, the body 6 forms a handle and incorporates various components not shown, including a motor, a mechanism for transmitting movement from a rotor of the motor to the cutting head 4, a switch, light indicators allowing to provide information relating to the electrical state of the pruning shears 1 and to the autonomy of the battery, and a control trigger.

Referring to Figures 1 and 4, the cutting head 4 comprises a movable blade 8 and a fixed blade 10, also called counter-blade or hook.

The movable blade 8 comprises an inner cutting edge 12 having a curved profile and, opposite the cutting edge 12, an outer edge 14 also having a curved profile.

The fixed blade 10 also comprises an inner edge 16 (see tip of the blade 10 in Figures 1 and 4) and an outer edge 18 which also have a curved profile.

The curved profile of the blades 8 and 10 give the cutting head 4 the shape of a bird's beak.

This particular geometry of the cutting head 4 is in no way limiting. For example, in an embodiment not shown, the internal edge 12 and/or the external edge 14 of the movable blade 8 and/or the internal edge 16 and/or the external edge 18 of the fixed blade 10 can be rectilinear.

The fixed blade 10 is fixedly connected to the body 6 of the shears 1.

The movable blade 8 is connected to the body 6 according to a pivot connection allowing rotation of the blade 8 around an axis A1 (see ) between a first position corresponding to a closed position of the cutting head 4 and a second position corresponding to an open position of the cutting head 4.

In a manner known per se, the position of the movable blade 8 is controlled by the motor of the shears 1 via the movement transmission mechanism.

In Figures 1 to 5, the cutting head 4 is in the closed position. In this position, the movable blade 8 and in particular its cutting edge 12 covers part of the fixed blade 10, it being understood that the movable blade 8 and the fixed blade 10 are offset relative to each other along the axis A1.

In the open position (not shown), the cutting head 4 defines between the blades 8 and 10 an opening intended to receive a plant element to be cut.

In this example, the secateurs 1 make it possible to position the cutting head 4 in said open position as well as in nine intermediate positions called half-open positions, under the action of the trigger.

As an indication, the secateurs 1 in this example have a mass of approximately 800 grams and make it possible to exert a torque on the mobile blade 8 of between 180 and 360 N m.

The invention relates more specifically to the device 2, intended to carry the shears 1 or a similar shears.

An embodiment of this device 2 is described below with reference to Figures 6 to 11.

In general, the device 2 comprises a support 20, a shell 22 and a mechanism for connecting the support 20 and the shell 22 (see ).

Each of the figures comprises a frame of reference defining a vertical direction D1, a transverse direction D2 and a lateral direction D3 orthogonal to each other. This repository is associated with the support 20 and makes it possible to define the relative orientation of the other parts of the device 2, in particular of the shell 22, with respect to the support 20.

In this example, support 20 includes a generally rectangular shaped plate 24 which defines an inner surface 24A and an outer surface 24B spaced apart along direction D2 (see Figures 6 and 7).

The support 20 comprises an arm 26 forming a hooking lug which extends substantially parallel to the plate 24, vis-à-vis the outer surface 24B ( ).

On the opposite side, the support 20 comprises a tubular element 30 forming a shaft which extends in line with the internal surface 24A of the plate 24, in the direction of the shell 22.

The shaft 30 has an axis A2 of revolution which is parallel to the direction D2 and, in this example, normal to the surface 24A.

With reference to the , the device 2 also comprises a centering part 32 extending around an axis of revolution. This axis is also referenced A2 because it merges with the axis A2 of the shaft 30 when the device 2 is assembled (see further below).

The centering part 32 comprises an annular base 34 at right angles to which extend, along the axis A2, two internal 36 and external 38 concentric annular elements. Part 32 is crossed by a central opening of axis A2.

With reference to the , the device 2 also comprises a connecting piece 40 having a generally annular shape, as well as a spring 42.

The connecting piece 40 comprises, along the direction D2, a first portion defining a first internal diameter and a second shouldered portion defining a second internal diameter smaller than the first internal diameter.

The first internal diameter is defined by a radially internal surface of the connecting piece 40 opposite which extends, radially inwards, a stop element 44.

The connecting piece 40 also comprises a pin 45 extending transversely from the second portion of this piece 40.

Concerning the spring 42, this is a torsion spring which in this example has an internal diameter substantially identical to the diameter of the opening of the centering piece 32.

The spring 42 comprises two fixing ends 46 and 48 (see FIGS. 6, 9 and 11).

In the example of the , the shell 22 comprises an inner half-shell 50 and an outer half-shell 52.

With reference to the , the inner half-shell 50 comprises a connecting member 54 which extends in line with an outer surface 56 of this inner half-shell 50, in the direction of the support 20.

From the outer surface 56 of the inner half-shell 50, the connecting member 54 comprises a first module 58 forming a substantially planar surface 58A and a second module 60, extending projecting from the first module 58 in bearing direction 20.

The second module 60 forms an elastically deformable annular lip provided with a collar constituting a transverse stop (see further below).

The first module 58 comprises a circumferential groove 62 extending radially outside the lip 60.

The shaft 30 of the support 20, the centering piece 32, the connecting piece 40, the spring 42 and the connecting member 54 of the internal half-shell 50 together form said mechanism for connecting the support 20 and the shell 22, making it possible to connect the different parts of the device 2 to each other in the following manner.

There illustrates an assembly of the support 20 and the centering piece 32.

Referring to Figures 8 and 10, the base 34 of the centering part 32 is arranged facing the internal surface 24A of the support 20 so that the shaft 30 extends through the central opening of the part of centering 32. In this example, the central opening of the centering piece 32 is dimensioned to form with the shaft 30 a fit of the sliding type allowing the piece 32 to be centered on the shaft 30.

There illustrates an assembly of the subset of the , the connecting piece 40 and the spring 42.

Referring to Figures 6 and 11, the connecting piece 40 is fixed to the support 20 using fixing means 70 such as screws, in a configuration in which this connecting piece 40 houses the shaft 30, the part centering pin 32 and spring 42.

The centering part 32 is dimensioned so that its outer annular element 38 cooperates with a part of said radially inner surface of the connecting part 40. The said first internal diameter of the connecting part 40 and the outer diameter of the centering part 32 are chosen so that these parts 32 and 40 are connected to each other in a slip-type fit.

The centering piece 32 thus makes it possible to center the connecting piece 40 on the shaft 30, around the axis A2.

With reference to the , the spring 42 is arranged in the extension of the shaft 30 in the direction D2.

The end 46 of the spring 42 is arranged in a groove formed by the abutment element 44 of the connecting piece 40 so that this abutment element 44 prevents a displacement of this end 46 of the spring 42 in at least one direction in rotation around axis A2 (see FIGS. 6 and 11).

There shows another sub-assembly of the device 2 allowing in particular to visualize the connection of the other end 48 of the spring 42.

The end 48 of the spring 42 is inserted into an orifice formed by the first module 58 of the connecting member 54 of the internal half-shell 50, so as to prevent any displacement of this end 48 in rotation around the axis A2.

The subset of the and the internal half-shell 50 are assembled by inserting said second shouldered portion of the connecting piece 40 into a space delimited transversely on the one hand by the surface 58A formed by the first module 58 of the connecting member 54 of the internal half-shell 50 and on the other hand by the collar formed by the second module 60 of this connecting member 54, this by insertion by force resulting in a temporary deformation of the lip formed by this connecting member 54.

The distance between the surface 58A and the collar is chosen so as to prevent or limit the movements of the connecting part 40 with respect to the internal half-shell 50 in translation along the direction D2 while allowing a relative rotation of the connecting part. connection 40 with respect to the internal half-shell 50 around the axis A2.

The connecting piece 40 is also arranged so that the pin 45 extends into the groove 62 formed by the connecting member 54 of the internal half-shell 50.

This assembly thus allows a movement in rotation around the axis A2 of the internal half-shell 50 with respect to the connecting piece 40 and consequently with respect to the support 20.

The circumferential dimension of the groove 62 determines the maximum amplitude of this displacement, which corresponds in this example to a maximum rotation of approximately 120°.

When the spring 42 is in an initial state, in this case at rest or slightly stressed, the internal half-shell 50 is in a first position relative to the support 20. In this first position, the pin 45 is supported on, or at least disposed adjacent to, a first circumferential end of groove 62.

The device 2 is configured so that the internal half-shell 50 can be driven in a direction in rotation around the axis A2 with respect to the support 20, causing a displacement of the pin 45 in the groove 62 in the direction of a second circumferential end of this groove 62 and simultaneously deforming the spring 42 by gradually increasing the corresponding deformation stress.

The internal half-shell 50 is here considered to be in a second position relative to the support 20 when the pin 45 is resting on the second circumferential end of the groove 62.

The spring 42 is configured to return the inner half-shell 50 to the first position in the absence of a driving force exerted thereon greater than a minimum force. In this example, the weight of the shears 1 makes it possible to exert on the internal half-shell 50 a drive force greater than this minimum force (see further below).

Referring to Figures 4 to 6, the half-shell 50 comprises a main wall 79 and wall elements 80 and 82 which extend transversely in line with the main wall 79 so as to respectively form a first internal surface 88 and a second inner surface 89.

The main wall 79 and the internal surfaces 88 and 89 delimit a first part of a housing 86 intended to receive the fixed blade 10 of the cutting head 4 of the shears 1.

Transversely opposite the main wall 79 and perpendicular to the internal surfaces 88 and 89, the wall elements 82 form a surface intended to delimit a second part of the housing 86 provided to receive the movable blade 8 of the cutting head 4 of the shears 1 (see ), it being recalled that the mobile blade 8 is offset in the direction D2 with respect to the fixed blade 10.

In this example, the transverse dimension, along the direction D2, of the wall elements 80 and 82 is slightly greater than the thickness of the fixed blade 10 of the cutting head 4 of the shears 1.

The wall elements 80 are configured so that the first internal surface 88 has a profile complementary to that of the external edge 18 of the fixed blade 10 of the shears 1 while the wall elements 82 are configured such that the second internal surface 89 has a profile complementary to that of the outer edge 14 of this fixed blade 10.

Thus, in this example, the first part of the housing 86 delimited by the internal surfaces 88 and 89 has a geometry complementary to that of the fixed blade 10 of the cutting head 4, so that these surfaces make it possible on the one hand to guide the insertion of the cutting head 4 of the shears 1 within the housing 86 and on the other hand to match the contours of the fixed blade 10 when the cutting head 4 is inserted into the housing 86 ( ).

The half-shell 52 delimits the second part the housing 86.

When the shell 22 is assembled, the housing 86 is thus delimited transversely by the main wall 79 of the half-shell 50 and by the half-shell 52 and, laterally, by the wall elements 80 and 82 of the half-shell 50 as regards the first part of the housing 86 and by parts of the half-shell 52 as regards the second part of the housing 86.

The assembled shell 22 includes an opening 86A allowing the cutting head 4 of the shears 1 to be inserted into the housing 86.

In this example, the half-shells 50 and 52 are assembled with each other using fixing means 90 such as screws (see ).

The shell 22 comprises a rigid material configured not to deform under the action of the forces exerted by the shears 1 when the latter is carried by the device 2 (see further below).

In this example, each of the half-shells 50 and 52 comprises plastic.

In addition, the half-shells 50 and 52 are sized and structured to be able to withstand loading of the shell 22 during the implementation of the device 2, including for example under the action of an involuntary opening torque of the cutting head 4.

In this example, the geometry of the housing 86 is provided to receive the blades 8 and 10 of the cutting head 4 and only these, as is visible on the .

In particular, when the cutting head 4 is inserted into the housing 86, the body 6 of the shears 1 is located outside the housing 86 and more generally the shell 22.

With reference to the , the device 2 comprises a retaining member 92 comprising a latch 94 and a compression spring 96.

The shell 22 is provided with a groove 98 for guiding the latch 94 allowing a translation of the latter relative to the shell 22 between a first position illustrated on the , in which the latch 94 is retracted, and a second position illustrated in the , in which the latch 94 is deployed.

In this example, the half-shell 50 forms a first half-part of the groove 98 and the half-shell 52 forms a second half-part of this groove 98.

The spring 96 is mounted in the shell 22 so as to exert on the latch 94 a force tending to return it to the deployed position.

An example of use of the device 2 will now be described.

The device 2 is attached to a belt of a vest (not shown) worn by a user, thanks to the attachment tab 26 of the support 20 (see ) so that the D1 direction is vertical (the datum D1 direction arrow pointing vertically up).

The device 2 is initially arranged in the configuration illustrated in FIGS. 1 and 4, in which the opening 86A of the housing 86 extends in a plane that is substantially oblique with respect to the vertical direction D1 and, overall, vertically above it. above housing 86.

After manually positioning the latch 94 in the retracted position, by exerting thereon a force compressing the spring 96, the cutting head 4 of the shears 1 can be inserted into the housing 86 of the shell 22, along a trajectory which is in this curved example given the geometry of the cutting head 4 and the housing 86.

During this insertion, the cutting head 4 follows a trajectory directed vertically downwards to reach the configuration illustrated in FIGS. 2 and 5, being guided in particular by the internal surfaces 88 and 89 of the half-shell 50 which cooperate with the fixed blade 10.

In this configuration, the latch 94 can be released, after which it is automatically moved to the deployed position under the action of the spring 96.

In the configuration of the , one end of the latch 94 rests on the cutting head 4, in this case on the fixed blade 10, thus forming a stop which opposes a withdrawal of the cutting head 4 from the housing 86.

The cutting head 4 is thus immobilized with respect to the shell 22 since the housing 86 matches the contours of the fixed blade 10 and the latch 94 blocks the withdrawal of the cutting head 4 in this configuration.

Given the orientation of the shell 22 with respect to the vertical D1, when the user releases the pruning shears 1, the latter drives under the action of its own weight the shell 22 in rotation around the axis A2 by compared to the support 20 to reach the configuration of the , in which the pin 45 of the connecting piece 40 abuts on said second circumferential end of the groove 62 of the connecting member 54 formed by the half-shell 50.

In this configuration, the pruner 1 is suspended and thus extends vertically downwards, along one leg of the user.

In this particular example, pruner 1 is more precisely suspended by its cutting head 4.

While having a reduced bulk, the shell 22 thus makes it possible to protect the cutting head 4 of the shears 1 while facilitating the movements of the user, in particular of his arms.

To remove the shears 1 from the device 2, the user need only grasp the body 6 of the shears 1 so as to reposition, for example, the device 2 in the configuration of the , to move the latch 94 into the retracted position and then to remove the cutting head 4 from the shell 22.

In this example, the spring 42 of the device 2 makes it possible to automatically reposition the shell 22 according to the orientation illustrated on the relative to the support 20 and to keep it in this position when the device 2 is not loaded.

Of course, the invention is not limited to the embodiments described above. For example, the shell 22 can be fixed relative to the support 20 so as to maintain, for example, an orientation such as that illustrated on the , requiring in this case an insertion of the cutting head 4 of the shears 1 in the shell 22 along a trajectory comprising an upward vertical translation component, and its withdrawal along a trajectory comprising a downward vertical translation component (not represented). Alternatively, the shell 22 can be connected to the support 20 according to a connection different from that described above, for example according to a connection defining both a degree of freedom in rotation and a degree of freedom in translation (not represented).

In another embodiment, not shown, the device 2 comprises a retaining member different from the member 92. For example, the device 2 can comprise a retaining means comprising a movable element in the direction D2 so as to extend into an opening formed by one of the blades 8 or 10, or by the two blades 8 and 10. The restraint can also be achieved using a strap cooperating with the cutting head 4 and/or with the body 6 of shears 1 (not shown). In another variant, not shown, the housing 86 of the shell 22 may have a geometry allowing an opening of the cutting head 4 within the housing 86 so that the outer edges 14 and 18 of the blades 8 and 10 exert a force support on opposite surfaces delimiting the housing 86 preventing as such a withdrawal of the cutting head 4.

In another embodiment not shown, the housing 86 of the shell 22 can be configured to match the contours not of the fixed blade 10 but of the movable blade 8 of the cutting head 4. Furthermore, the housing 86 of the shell 22 may have a geometry that does not match the contours of the movable blade 8 or of the fixed blade 10, allowing a certain movement of the cutting head 4 relative to the shell 22. However, it is preferred but not mandatory to immobilize the cutting head 4 with respect to the shell 22, using the geometry of the housing 86 and/or, as an option, one or more additional retaining means.

Claims (8)

Secateurs-holder device (2) comprising a shell (22) provided with a housing (86) configured to receive a cutting head (4) of a secateurs (1), characterized in that it is configured to be able to hold the shears (1) suspended when the cutting head (4) is received in the housing (86) of the shell (22) and in that it comprises a support (20) intended to be connected to an accessory such as a belt or a piece of clothing, the shell (22) being connected to the support (20) according to a connection defining at least one degree of freedom in rotation so as to allow movement of the shell (22) between a first position provided to allow insertion of the cutting head (4) of the shears (1) within the housing (86) of the shell (22), or its removal from this housing (86), and a second position allowing the shears (1) to be suspended , the device (2) being configured so that, when the cutting head (4) is inserted into the housing (86) of the shell (22) arranged in the first position, the secateurs (1) move under the action gravity the shell (22) from the first position to the second position. Device (2) according to Claim 1, in which the housing (86) of the shell (22) is configured to receive only the cutting head (4) of the shears (1). Device (2) according to claim 1 or 2, configured to be able to keep the pruner (1) suspended by the cutting head (4). Device (2) according to any one of claims 1 to 3, comprising a retaining member (92) movable between a first position allowing insertion of the cutting head (4) of the shears (1) within the housing (86 ) of the shell (22), or its removal from this housing (86), and a second position capable of preventing withdrawal of the cutting head (4) of the shears (1) from the housing (86) of the shell (22 ). Device (2) according to Claim 4, in which the shell (22) forms at least one abutment surface (88, 89) for the cutting head (4) and the retaining member (92) forms at least another stop surface for the cutting head (4). Device (2) according to Claim 5, in which the shell (22) forms at least one abutment surface (88, 89) for a blade (10) of the cutting head (4) and the retaining member (92 ) forms at least one other abutment surface for this blade (10). Device according to any one of Claims 1 to 6, comprising an elastic member (42) configured to return the shell (22) to the first position when the latter does not receive the cutting head (4) of the secateurs (1) . Method of coupling a pruner (1) and a pruning device (2) according to any one of claims 1 to 7, comprising a step of inserting a cutting head (4) of the pruner (1) in the housing (86) of the shell (22) of the device (2).