WO2012156621A1 - Outil a main equipe d'un dispositif de fixation d'au moins une tete d'outil a l'extremite d'au moins un manche - Google Patents
Outil a main equipe d'un dispositif de fixation d'au moins une tete d'outil a l'extremite d'au moins un manche Download PDFInfo
- Publication number
- WO2012156621A1 WO2012156621A1 PCT/FR2012/051034 FR2012051034W WO2012156621A1 WO 2012156621 A1 WO2012156621 A1 WO 2012156621A1 FR 2012051034 W FR2012051034 W FR 2012051034W WO 2012156621 A1 WO2012156621 A1 WO 2012156621A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- axial
- locking
- cavity
- handle
- head
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25G—HANDLES FOR HAND IMPLEMENTS
- B25G3/00—Attaching handles to the implements
- B25G3/02—Socket, tang, or like fixings
- B25G3/12—Locking and securing devices
- B25G3/18—Locking and securing devices comprising catches or pawls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F1/00—Combination or multi-purpose hand tools
- B25F1/02—Combination or multi-purpose hand tools with interchangeable or adjustable tool elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25G—HANDLES FOR HAND IMPLEMENTS
- B25G1/00—Handle constructions
- B25G1/04—Handle constructions telescopic; extensible; sectional
Definitions
- the present invention relates to the field of hand tools, and in particular garden tools.
- the invention relates to a device for fast attachment of a head to the end of a handle or handle for receiving / manipulating the head.
- a user may therefore for example be provided with a handle of substantial length (of the order of 1.5 m) on which he will adapt a head such as a hoe, a spade, etc. to perform work. outside, and move to a handle of reduced length (of the order of 20 to 30 cm) on which it will adapt a head such as a claw or a transplant to perform more precise work, for example in a balcony box.
- such a fixing device has the disadvantage of a delicate insertion of the insert of the head inside the connection sleeve; Indeed, the insert of the head, which has a rectangular section, must be inserted substantially without play in the radial direction within a complementary section of cavity provided in the connection sleeve integral with the handle. This insertion requires carefully placing the insert facing the opening of the cavity, before being able to penetrate into said cavity and achieve the assembly of the head and the handle by locking the insert in the cavity by means of the stop element of the leaf spring. This operation is therefore tedious and requires a certain time.
- the head will be rickety mounted in the radial direction relative to the handle.
- the present invention is intended to overcome these disadvantages and proposes a hand tool, including a gardening tool or DIY, comprising:
- a shaft defining an axis and having an end
- a fixing device comprising:
- a male element having an axial coupling pin with a cross-section complementary to that of said axial cavity for receiving the female element, and adapted to cooperate with said cavity for coupling in rotation with the male element and the female element, a first and a second element chosen from the male element and the female element being respectively provided at the end of the head and at the end of the handle;
- a locking / unlocking system of the male element relative to the female element adapted to block the relative movement of these two elements in the axial direction;
- said receiving cavity and said coupling pin have portions of complementary frustoconical longitudinal sections.
- the portions of frustoconical complementary longitudinal sections of the cavity and the spindle extend over at least half, and in particular over two-thirds of the penetration length of the male element to inside the female element.
- portions of frustoconical longitudinal sections is meant here that the outer envelope of the pin - respectively inner of the cavity - obtained by revolution about the axis defined by the handle of a generator connecting the points of at least a portion of the pin farthest from this axis - respectively the closest to this axis for at least a portion of the cavity - has substantially the shape of a cone or a truncated cone.
- the insertion of the spindle of the male element inside the female element is facilitated, a centering effect being obtained by the cooperation of the frustoconical surfaces provided respectively on the spindle and on the cavity.
- a rapid attachment device a user does not need to accurately position the head relative to the handle to align their respective axes and achieve the insertion of the pin inside the cavity ;
- the device according to the invention thanks to its frustoconical bearing surfaces, allows a certain offset of the axes of the spindle and the axial cavity before insertion, the frustoconical complementary longitudinal sections that present these two elements performing the alignment of said axes as the pin is plugged inside the cavity, thus facilitating this insertion operation.
- the head is locked with respect to the shaft in the axial direction by means of the locking, and received without play in the axial and radial directions through conical bearing surfaces respectively provided on said pin and said cavity. More specifically, these complementary conical bearing surfaces provided on the spindle and the cavity act as abutments in the axial direction limiting the movement of said spindle relative to said cavity in the direction of insertion of the tool head inside the spindle. handle, the locking / unlocking system ensuring the locking of the spindle inside the cavity in the axial extraction direction.
- the manufacturing tolerances of the various elements used can be compensated and an assembly without play of the tool and the handle can be obtained.
- the manufacturing costs of the parts used in the assembly can thus be reduced.
- the fixing devices described in the aforementioned documents allow only two relative configurations of insertion and locking of the head and the handle, the position of the head relative to the handle in the second configuration being shifted by 180 ° relative to the position of the tool in the first configuration.
- the user must place the head and the handle in one or other of its relative configurations to be able to achieve the attachment of these two elements, which makes it all the more difficult this operation.
- the complementary cross sections of the receiving cavity and the coupling pin are of the star type, in particular with 4 or 6 branches.
- the user will be able to arrange the head and the handle in a plurality of relative configurations, including 4 or 6 different relative configurations, which facilitates the assembly of these two elements and improves the ergonomics of all in the context of performing certain work in which it is advantageous to have a plurality of relative configurations between the head and the handle.
- this rotation coupling achieved by the cooperation of complementary forms in star has a better ratio of mechanical strength, especially in terms of transmissible torque, volume of material, the rotational couplings made by cooperation of complementary shapes square, rectangular, hexagonal, etc ....
- the material costs of the various elements, as well as the weight of the whole, are thus reduced.
- said locking / unlocking system comprises:
- the axial abutment portion of the coupling pin is formed by an axial abutment surface, in particular a shoulder defined by a groove formed in said pin; this axial abutment surface can also be obtained by forming a slot or a flat made in said pin. The formation of this groove, slot or this flat may for example be achieved by a machining operation or forging the spindle; the elastic locking element has:
- At least one bending portion intended to bend following the actuation of the actuating element
- the elastic blocking element is in the form of a spring blade integral with the female element, and:
- the fixing portion is formed of at least one fastening lug to the female element
- the at least one bending portion is formed of at least one axial segment extending in the axial direction and at least one inclined segment forming an angle with the axial segment and extending towards the axis of the cavity of the female element, said inclined segment constituting the actuating portion of the elastic element on which the actuating element acts when it is actuated, and
- the axial locking portion is formed of at least one axial locking tab provided at the end of the at least one bending portion;
- the spring blade has substantially the shape of a Y, the attachment portion to the female member forming with an axial segment of the bending portion the lower branch of the Y, and two inclined segments of said bending portion forming the branches superior of this Y
- the actuating element of the locking / unlocking system is in the form of a manually actuatable button received in translation in a direction substantially perpendicular to the axis defined by the handle within a housing formed in the housing; female element and opening into the receiving cavity, and which, when actuated exerts a force on the resilient axial locking element disposed in the locking position, so as to disengage it from the abutment surface of the spindle coupling, and allow the extraction of said coupling pin outside the cavity; a device for retaining the actuating element inside the housing is provided to limit the stroke of said element and prevent its extraction outside said housing; the actuating element has a substantially U - shaped inverted cross - section having a base on which a user acts to actuate the actuating element, and two wings, and that, when actuated, the wings of the actuating element come into contact with the actuating portion of the spring blade and exert a force thereon so that the bending portion bends and the axial locking portion is disengaged
- the ejection portion of the pin formed on the actuating element is in the form of an inclined surface or ramp intended to cooperate with the end of the coupling pin during unlocking of the locking system / unlocking and exerting on it an axial force in the direction of extraction of the pin outside the receiving cavity; the end of the head and / or the end of the handle is provided with a sleeve comprising at least one end portion made of an elastic material which is compressed in the axial direction when said head is locked on said handle.
- the invention also relates to a range of tools comprising a tool as defined above, the head having a first function, said range comprising at least one additional head having an end and a second function different from the first, a first element additional being provided at the end of the additional head, the first element and the first additional element being identical, as well as a range of tools comprising a tool as defined above, the handle having a first function, said range comprising at at least one additional handle having an end and a second function different from the first one, a second additional element being provided at the end of the additional handle, the second element and the second additional element being identical.
- FIG. 1 is a perspective view of an embodiment of the quick-fastening device according to the invention in a configuration separated from the head and the handle;
- FIG. 2 is a longitudinal sectional view of an embodiment of the quick fastening device according to the invention in assembled configuration of the head and the handle;
- FIG. 2a to 2c are sectional views respectively along the line AA, BB and CC of Figure 2;
- - Figure 3 is a longitudinal sectional view of another embodiment of the quick fastening device according to the invention in assembled configuration of the head and the handle;
- FIGS. 3a to 3c are sectional views respectively along the line A-A, B-B and C-C of Figure 3;
- FIGS. 4a to 4d illustrate various embodiments of the elastic element in the form of a spring blade
- FIG. 5 illustrates a range of tools comprising two tool heads of different functions, namely a tool head with a transplanter function and a tool head with a claw function, which can fit on two different sleeves, namely a long handle, in particular telescopic and equipped with an end handle, and a short handle.
- the male member 21 is provided at the tool head 2 and the female member 31 is provided at the handle. This provision could nevertheless be reversed without departing from the scope of the present invention.
- the hand tool 1 is a gardening tool comprising an elongated handle 3 defining an X axis and having a first particular function such as a telescopic handle function, and a tool head 2 having a first particular function, here a transplanter function.
- the handle 3 has an end 30 for receiving and locking in the axial direction X an end 20 of a tool head 2, and comprises a female element 31 defining a receiving cavity 32 of a coupling pin 22 provided at the end 20 of the tool head 2.
- the handle 3 has a symmetry of revolution about the X axis, but this handle could not have such symmetry and have for example a square, rectangular, ovoid cross section, etc.
- the cavity 32 of the female element 31, here provided at the end 30 of the handle 3, and the pin 22 of the male element 21, here provided at the end 20 of the head 2 have portions of complementary frustoconical longitudinal sections.
- the portions of frustoconical complementary longitudinal sections of the cavity 32 and the spindle 22 extend over at least half, and in particular over two-thirds of the length of penetration of the male element into the interior of the chamber. 'female element.
- Such complementary sections make it possible to obtain a centering and guiding effect of the coupling pin 22 inside the receiving cavity 32, thus facilitating the insertion of the head 2 inside the handle 3.
- the insertion of the coupling pin 22 of the head 2 inside the cavity 32 of the handle 3 is made by engaging with play the end of more small dimension of the pin inside the larger end of the cavity.
- the gaps between these two elements are reduced and a guiding effect is obtained.
- the cavity 32 and the pin 22 have complementary cross-sections in a star, here in a star at 6 branches as visible in particular in Figure 2C.
- the complementary star-shaped transverse sections of the cavity 32 and the pin 22 have 4 branches, as can be seen in particular in FIG. 3c.
- this rotational coupling produced by the cooperation of complementary star shapes has a better ratio of mechanical strength, particularly in terms of transmissible torque, to volume of material, than rotational couplings made by cooperation of square, rectangular, complementary shapes. hexagonal, etc ....
- the material costs of the various elements, as well as the weight of all, are reduced.
- the handle 3 may be equipped with an outer sleeve 35 fitted and locked in the axial direction at the end 30 of a profile 34 intended to receive the tool head 2.
- This sleeve 35 has an opening 36 for passage of the actuating element 6 of the locking / unlocking system, and is intended to cooperate with a complementary outer sleeve 25 provided at the level of the tool head to form a substantially continuous outer casing at the junction zone between the handle 3 and the head 2 in assembled configuration of these two elements.
- the sleeve 35 associated with the handle 3 and / or the sleeve 25 associated with the tool head 2 comprises at least one portion made of an elastic material which is compressed in the axial direction when said head is locked on said handle.
- the tolerance compensation and play-catching capabilities in the quick-fastening device according to the invention are further improved, and the vibrations that may appear within it can be absorbed.
- the expansion of this portion of elastic material may contribute to the partial ejection of the head outside the handle.
- the coupling pin has an annular groove 24 defining an axial abutment portion, or axial shoulder 23, forming part of the locking / unlocking system which will now be described in connection with FIGS. 2, 2A, 2B, 2C and 3, 3A, 3B, 3C.
- Figures 2 and 3 correspond to sectional views of the quick fastening device according to the invention in which only the actuating element 6 and the elastic element 5 are shown in external view.
- the locking / unlocking system comprises an elastic locking element 5 integral with the female element 31 and intended in the locking position to cooperate with the axial abutment portion 23 to prevent the extraction in the direction E of the spindle. coupling 22 outside the receiving cavity 32.
- this resilient locking element is in the form of a substantially Y-shaped leaf spring, comprising a fastening portion 51 to the female element, here one or several fastening tabs. inserted with clamping within a groove formed in the female member 31, a bending portion 52 extending substantially entirely within a recess or housing 33 formed in the female member 31, and having here an axial segment 521 in contact with the female element and forming with the fixing portion 51 the lower branch of the Y, and two inclined segments 522 in the direction of the X axis forming the upper branches of the Y, and a blocking portion axial 53 provided at the end of the bending portion 52, here each inclined segment 522, and in the form of axial locking lugs 53 intended to cooperate with the portion or axial abutment surface 23 provided on the pin 22.
- this substantially Y-shaped leaf spring can be obtained from a metal sheet in which a pattern generally having a Y shape is cut out. said boss then being for example folded so as to form the fixing portion 51, the inclined segments 522 of the flexion portion 52 and the axial locking portion 53 of the elastic locking element 5.
- this spring blade may be able to present substantially a shape of I, Y whose space between the upper branches is full, or U, without departing from the scope of the present invention.
- the locking / unlocking system further comprises an actuating element, here an actuating button 6 movable in a direction substantially perpendicular to the X axis inside a housing 33 formed in the female element 31 and opening into the cavity 32, and intended when it is actuated to exert a force on the actuating portion of the elastic locking member so as to bend the flexion portion 52 and to release the blocking portion 53 of the stop portion 23.
- an actuating element here an actuating button 6 movable in a direction substantially perpendicular to the X axis inside a housing 33 formed in the female element 31 and opening into the cavity 32, and intended when it is actuated to exert a force on the actuating portion of the elastic locking member so as to bend the flexion portion 52 and to release the blocking portion 53 of the stop portion 23.
- this actuating element is in the form of an inverted U - shaped cross section actuating button (see FIGS. 2A, 2B and 3A, 3B) presenting a base 61 on which a user acts to actuate the actuating element, and two wings 62 for exerting a force on the respective actuating portions 522 of the elastic element when the actuating element is actuated in a manner at bending the inclined segments 522 of the bending portion 52 and disengaging the corresponding locking tabs 53 from the abutment surface 23, thereby unlocking the movement of the spindle relative to the cavity in the axial extraction direction E, l spacing e wings 62 of the U being sufficient to allow the passage of the pin 22 between them and allow its extraction outside the cavity 32.
- a device for retaining the actuating element 6 inside the housing 33 is provided to limit the stroke of said element and prevent its extraction outside said housing 33.
- this retaining device may be formed of at least one lateral projection 63 provided on the outer face of at least one flange 62 of the actuating element 6 and intended to cooperate with at least one abutment surface 34 provided at the female element 31 when the actuating element is in the rest position.
- the actuating element has an ejection portion 64 of the spindle 22 intended to exert an axial force on said spindle in the direction of its extraction. outside the receiving cavity 32 during the unlocking of the locking / unlocking system 4.
- This ejection portion is in the form of an inclined surface or ramp 64 intended to cooperate with the axial end of the coupling pin 22 when unlocking the locking / unlocking system 4 and to exert on it an axial force in the direction of the extraction E of the pin 22 outside the receiving cavity 32.
- this inclined surface can be defined by a central rib 64 formed at the surface of the base 61 of the button 6 located next to pin 22.
- the end of the pin 22 of smaller dimension then comes into contact with the bending portion 52, and more particularly with the inclined segments 522, of the elastic element 5, and, when the insertion movement is continued, causes the bending of said bending portion 52 inside the recess 33 of the female element 31 and away from the axis X.
- a noise is heard, for example a metallic noise if the pin and the elastic element are made of metal, indicating to the user that the pin 22 of the tool head 2 is locked inside the cavity 32 of the female element 31 equipping the handle 3.
- the female element 31 is in the form of a cross-sectional element externally complementary to that of a profile 34 of the handle 3 and intended to be inserted and blocked inside said profile 34 at the end 30 of the handle 3 for receiving the tool head 2.
- a housing or recess 33 for passage for the actuating element 6 in which also extends the portion for actuating the elastic element 5, as well as a fixing groove for receiving the fixing portion of said elastic element 5, are provided in the female element 31.
- a user can press the actuating element 6 so that it exerts a force on the actuating portion 522 of the elastic element 5 tending to bend the bending portion 52 of said elastic member 5 inside one recess 33 provided on the female member 31 and to cause the release of the blocking portion 53 away from the abutment portion 23 of the spindle.
- the blocking in the axial direction of extraction E is no longer ensured and the pin 22 of the tool head 2 can be extracted outside the cavity 32 of the female element 31 fitted to the handle 3, the return of the rest position of the actuating element 6 being ensured by the return of the elastic element 5 in the locked position.
- the ejection portion formed by the inclined surface or ramp 64 is brought into contact with the axial end of the coupling pin 22 and exerts on it an axial force in the extraction direction E so as to cause an effect ejection or partial output of the pin 22 outside the cavity 32.
- This ejection effect may be further accentuated by the expansion of the elastic material portion of the sleeve 35 associated with the handle 3 and / or the sleeve 25. associated with the head 2 involved in unlocking the locking / unlocking system.
- the actuating element 6 is in the form of an inverted U whose flanges 62 have a spacing e sufficient to allow the axial end of them to pass between them. pin 22 and allow its extraction outside the cavity.
- the spacing e of the flanges 62 is greater than the largest outside diameter d of the spindle 22 at the level of said button, to which is added a clearance j of passage of the order of a millimeter.
- the invention furthermore relates to a range of tools comprising a handle 3 and a tool head 2 as defined above, the handle 3 being non-limitingly telescopic and equipped with an end handle 10 at its opposite end to that associated with the tool head 2, and an additional head 2 'having a second function particular, here a claw function, and provided with a pin 22 'intended to be inserted into the cavity 32 of the handle in place of the first tool head 2.
- the invention also relates to a range of tools comprising a handle 3 and a tool head 2 as defined above, and an additional handle 3 'having a second particular function, here a short handle function, and provided with a cavity 32' for receiving the pin 22 equipping a tool head 2 instead of the first round.
- the elements previously described and implemented in the hand tool according to the present invention, and in particular the spindle 22 of the tool head 2 and / or the female element 31 of the handle 3, may be made of metallic material ferrous or non-ferrous, such as steel, aluminum, or Zamac, made of plastic, in particular a polymeric material such as polyamide, reinforced or not with fibers, or present in their zones of mutual contact of coatings with calibrated friction coefficient.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Surgical Instruments (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1319897.3A GB2504428A (en) | 2011-05-13 | 2012-05-10 | Hand tool provided with a device for attaching at least one tool head to the end of at least one handle |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1154202A FR2975033B1 (fr) | 2011-05-13 | 2011-05-13 | Outil a main equipe d'un dispositif de fixation d'au moins une tete d'outil a l'extremite d'au moins un manche |
FR1154202 | 2011-05-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012156621A1 true WO2012156621A1 (fr) | 2012-11-22 |
Family
ID=46321074
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2012/051034 WO2012156621A1 (fr) | 2011-05-13 | 2012-05-10 | Outil a main equipe d'un dispositif de fixation d'au moins une tete d'outil a l'extremite d'au moins un manche |
Country Status (3)
Country | Link |
---|---|
FR (1) | FR2975033B1 (fr) |
GB (1) | GB2504428A (fr) |
WO (1) | WO2012156621A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMI20130294A1 (it) * | 2013-02-28 | 2014-08-29 | Nespoli Group S P A | Dispositivo di connessione per attrezzi |
EP3114914B1 (fr) * | 2015-07-07 | 2018-12-19 | Kompernass Handelsgesellschaft MbH | Dispositif de couplage mecanique |
DE102016012586B4 (de) * | 2016-10-21 | 2020-02-06 | Mtd Products Inc. | Lösbare Stielbefestigungskupplung für Arbeitsgeräte |
CN108372485B (zh) * | 2018-02-22 | 2023-06-06 | 南京久驰机电实业有限公司 | 一种电动工具多功能输出机构 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2348794A1 (fr) * | 1976-04-22 | 1977-11-18 | Gardena Kress & Kastner Gmbh | Embout d'accouplement pour assembler un outil,notamment de jardinage,avec un manche |
US4466377A (en) | 1981-02-06 | 1984-08-21 | Wolfe-Gerate Gmbh | Device for fastening handles, especially to domestic and gardening implements |
US5168693A (en) | 1990-03-01 | 1992-12-08 | Fiskars Zinck-Lysbro/A/S | Coupling means for a gardening tool |
DE202006001343U1 (de) * | 2006-01-28 | 2006-04-06 | We-Ga-Tec Gmbh & Co. Kg | Stielhalter für Arbeits- und Gartengeräte |
EP2055442A1 (fr) * | 2007-11-02 | 2009-05-06 | Carl Freudenberg KG | Outil de nettoyage |
-
2011
- 2011-05-13 FR FR1154202A patent/FR2975033B1/fr not_active Expired - Fee Related
-
2012
- 2012-05-10 WO PCT/FR2012/051034 patent/WO2012156621A1/fr active Application Filing
- 2012-05-10 GB GB1319897.3A patent/GB2504428A/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2348794A1 (fr) * | 1976-04-22 | 1977-11-18 | Gardena Kress & Kastner Gmbh | Embout d'accouplement pour assembler un outil,notamment de jardinage,avec un manche |
US4466377A (en) | 1981-02-06 | 1984-08-21 | Wolfe-Gerate Gmbh | Device for fastening handles, especially to domestic and gardening implements |
US5168693A (en) | 1990-03-01 | 1992-12-08 | Fiskars Zinck-Lysbro/A/S | Coupling means for a gardening tool |
DE202006001343U1 (de) * | 2006-01-28 | 2006-04-06 | We-Ga-Tec Gmbh & Co. Kg | Stielhalter für Arbeits- und Gartengeräte |
EP2055442A1 (fr) * | 2007-11-02 | 2009-05-06 | Carl Freudenberg KG | Outil de nettoyage |
Also Published As
Publication number | Publication date |
---|---|
GB2504428A (en) | 2014-01-29 |
FR2975033B1 (fr) | 2015-04-24 |
GB201319897D0 (en) | 2013-12-25 |
FR2975033A1 (fr) | 2012-11-16 |
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