FR3008609A1 - SAFETY BIT FOR CANE, AND ROD COMPRISING SUCH A TIP - Google Patents

Abstract

The present invention relates to a safety tip (1) for rod comprising a star-shaped foot (2) having five branches (24), each branch (24) carrying a non-slip damping pad (40), connected to a support of rod (3) by at least one connecting means (4), said rod support (3) having at least one coupling means (10, 12) arranged to receive and lock in position a lower end (6) of said rod . The coupling means (10, 12) comprises at least one locking member (12) and at least one actuating member (10), said actuating member (10) being arranged to be manually actuated and to move said member for locking (12) between an open position (PO) allowing the introduction of a rod (C) and a closed position (PF) locking said lower end (6) of said rod (C) in said safety tip (1). ) prohibiting its withdrawal regardless of its diameter.

Description

The present invention relates to a safety tip for a cane comprising a foot connected to a cane support by at least one connecting means, said cane support comprising at least one support element. coupling means arranged to receive and lock in position a lower end of said rod. The present invention also relates to a security element arranged to be coupled to a safety tip for a cane and a rod having at least one arm provided at its upper end with gripping means. Prior Art: The invention relates to the technical field of cane-type canes for persons with reduced mobility or any other type of simple cylindrical cane facilitating walking (bamboo rods and / or ending in cone / tip are to be avoided, as well as "white canes" for the visually impaired). More specifically, the technical field of the invention relates to a safety tip for a cane, in particular to stabilize and secure the walk of the user on all floors and in all weather by a tip of appropriate design. Usually, a walking stick or an English cane consists of an arm provided at one lower end with a standard rubber tip and at the other end with gripping means. The standard tip has the function of adhering and adapting to the surface of the ground to stabilize the cane and secure the person during walking. However, the bearing surface of such a standard nozzle, usually a circular disk 30, is not suitable for any type of soil, which therefore gives the rod a low stability. Indeed, in this configuration, there is a risk of falling for the user if the cane slips, for example, when the soil is wet or irregular. In addition, another disadvantage is that the cane does not stand alone and must be leaning against a wall or other. It often happens that it slips and falls to the ground. It is then difficult, if not impossible, for the person with reduced mobility to pick up the cane when it is on the ground. A safety tip solution has been developed by the applicant and has been the subject of the following publications FR 2,614,529, FR 2,637,178 and FR 2,715,559. This safety tip is adaptable to a standard cane or a cane. English in place of the standard tip and has a foot in the form of a five-pointed star, giving the user better stability in use and stability in vertical position. In addition, it comprises a ball joint connecting a cane support, in which is introduced by force the lower end of the cane, said foot. The ball joint allows a 360 degree rotation of the cane support relative to the foot. In addition, return means are provided in the ball joint, to allow, on the one hand, to ensure a vertical position to the rod when it is not used, and secondly, to straighten easily the cane when it fell to the ground by pressing with the foot on the foot of the tip. However, even if such safety tips give very satisfactory results, with regard to the safety of the person and the stability of the cane both in the vertical position not used, and in use, these present the 'disadvantage of not being able to be mounted on all rods and whatever their diameter. Indeed, existing rods on the market may have different diameters depending on the manufacturers and the different types of rods. It is then necessary to provide tips of different diameters that can be adapted to each corresponding rod diameter. This presents a considerable disadvantage for the tip manufacturer who is forced to make adaptations for the rod diameters out of the current 16-20 mm range. In addition, the mounting of such a safety tip must be made in force by means of a hammer or a mallet to lock the safety tip at the lower end of the cane, which presents a difficulty for the person. Although the publication FR 2 715 559 discloses a tip whose diameter can be adapted according to the diameter of the rod, it can not adapt to a wide range of diameters. Indeed, it comprises a foot connected to an amount whose free end has an axial bore for receiving the lower end of the rod. This free end is axially split and cooperates with a sleeve that moves axially tightens the free end to fit a smaller diameter than the initial section of the axial bore. Another disadvantage of such a safety tip is related to the mechanical limit of inclination of the ball joint. Indeed, the safety tip can be used safely for a maximum inclination of about 30 degrees. Beyond this maximum inclination, there may be risks of rupture of the patella, making the cane unusable and often irreparable. In this case, it is then necessary to replace the safety tip.

Also known from publication EP 2 415 367 a traditional English cane provided with a handle disposed at the upper end of a first tube of cane, and a rubber tip disposed at the lower end of a second tube of cane. The tip is formed of a foot and an auxiliary body which are interconnected by an axial screw. The auxiliary body has external recesses which retract by manual support spring pins provided on the second tube of rod to remove the tube of the foot after unscrewing the screw. However, although this tip is removable, it is not designed to be adapted to any type of rod diameter.

SUMMARY OF THE INVENTION The present invention aims to overcome these disadvantages by providing a safety tip universally adaptable to any diameter rod and allowing a risk-free tilt for the tip, while ensuring maximum safety of the person and stability of the cane in vertical position of rest and easy recovery of the cane in a horizontal position. For this purpose, the invention relates to a safety tip for a rod of the type indicated in the preamble, characterized in that the coupling means comprises at least one locking member and at least one actuating member, said actuating member being arranged to be operated manually and to move said locking member between an open position allowing the introduction of the lower end of a rod and a closed position locking said lower end of said rod in said security tip prohibiting its withdrawal. In this way, the invention makes it possible to automatically adapt the diameter of the cane support to the diameter of the lower end of the cane after its introduction, to lock the lower end of the cane in the mouthpiece and, if necessary, Unlock the lower end of the cane to remove the safety tip from the cane. In a preferred form of the invention, said actuating member is mounted in axial rotation around a central axis on said rod support, and comprises at least one movement transformation element arranged to transform said axial rotation movement of said actuating member, in a radial translational movement of said locking member. Preferably, the actuating member comprises at least one ring provided in its internal volume with at least one cam forming said movement transformation element, and said locking member comprises at least one arm rotatably mounted around a pivot axis on the rod support, the pivot axis being parallel to said central axis and said arm being arranged to cooperate with said cam between said open and closed positions. Said ring is advantageously formed by assembling a half lower ring and a half upper ring. In the preferred embodiment, said arm comprises a curved lever whose one end comprises said pivot axis and a second end comprises on the one hand a transverse stop arranged to cooperate with a cam profile of said cam and on the other hand a friction pad located opposite to said transverse stop arranged to exert a friction force on said lower end of the rod when it is inserted into said safety tip and said locking member is in the closed position. Preferably, said cam profile is notched and has a decreasing radius, with respect to said central axis, from the open position to the closed position.

In the preferred embodiment, said connecting means comprises a ball joint connection defined by a female ball joint, linked to said support rod, fitting on a male ball joint, integral with said foot, allowing an angle of inclination corresponding to the angle between the origin axis perpendicular to said foot and the central axis of said cane support.

Preferably, the female ball is open and defines a half-sphere. According to a preferred variant of the invention, said connecting means further comprises at least one return member arranged to return the rod support to a substantially zero angle of inclination coinciding with said original axis to ensure the vertical position of the rod and to allow an inclination angle of between 0 degrees and a threshold angle of inclination beyond which said female ball can disengage from said male ball.

According to a preferred variant of the invention, the threshold angle of inclination is at least approximately between 25 and 35 degrees and preferably equal to 30 degrees. In this case, said return member consists of a pre-stressed damping sleeve of elastic material mounted around the ball joint and prestressed between said foot and said rod support. Preferably, said foot comprises a star-shaped base comprising five branches, each branch carrying a non-slip damping pad.

According to a variant of the invention, said base further comprises a plurality of spike-forming spikes. According to another variant of the invention, said foot comprises a complementary safety element coupled to said foot by coupling means and disposed at least partially under said base, said security element comprising a plurality of spike-forming spikes. In this case, said security element has a star shape comprising five branches, each being provided with a tip, and said security element is assembled to said base so that the branches of the security element are angularly offset. branches of said base so that each branch of said security element is disposed between two successive branches of said base.

Said coupling means may comprise a plurality of clipping lugs arranged to fit on said foot. The invention also relates to a security element as defined in the preamble, characterized in that it comprises coupling means arranged to allow the coupling to the foot of said tip and in that it comprises a plurality of spike-forming tips. Finally, the invention also relates to a rod as defined in the preamble, characterized in that it comprises at its lower end a safety tip as defined above. BRIEF DESCRIPTION OF THE DRAWINGS The present invention and its advantages will become more apparent in the following description of an embodiment given by way of non-limiting example, with reference to the appended drawings, in which: FIG. 1 represents a sectional view FIG. 2 is an axial sectional view of the safety tip of FIG. 1 inclined relative to the ground at an angle equal to 30 degrees, FIG. cross-sectional view along the X axis of the safety tip of FIG. 1, showing the blocking members in open position without a cane, and FIG. 4 is a view similar to FIG. 3, showing the locking members in FIG. closed position on a lower end of a small diameter rod, Figures 5A and 5B are top and bottom views of a security element arranged to be coupled to the security tip according to the invention. FIGS. 6A and 6B are top and bottom views in transparency of the security element of FIGS. 5A and 5B, coupled to the foot of the security tip according to the invention, FIG. 6C is an enlarged sectional view. a detail of Figure 6A showing the clipping of a clipping tab on the foot of the tip, and - Figure 7 is a partial sectional view of the foot of the safety tip with and without safety element .

Illustrations of the invention and the best way to make it: With reference to the figures, the safety tip 1 for rod C includes a foot 2 connected to a cane support 3 by connecting means 4. The cane support 3 allows to receive the lower end 6 of a rod C and fix it by means of coupling means 10, 12. These further allow to adapt the safety tip 1 to any type of rod and that whatever their diameter.

For this purpose and as shown in Figures 3 and 4, the coupling means comprise a locking member 12 and an actuating member 10. The actuating member comprises a ring 10 movable in rotation about a central axis 33 of the rod support 3, while the locking member comprises three pivoting arms 12 inside the volume of the ring 10. On the one hand, the ring 10 is guided in rotation on the rod support 3 and formed, in the example shown, by assembling a lower half-ring 25 with an upper half-ring 26, made for example of polyacetal or the like. As shown in Figures 1 and 2, the assembly of the half-rings 25, 26 is made for example by clipping or any other equivalent means, preferably indémontable. In addition, the outer diameter of the upper and lower half-rings 25, 26 is knurled, to facilitate gripping and manipulation of the ring 10. On the other hand, the three arms 12 are equidistant from the central axis 33 and are rotatably mounted on the rod support 3, about their respective pivot axis 13. The arms 12 are preferably made of polyamide filled with glass or any other similar material. More particularly, each arm 12 comprises a curved lever 14, the first end 15 forms the pivot axis 13 with the rod support 3. The second end 16, for its part, comprises a notched transversal stop 17. In addition, a friction pad 19, preferably made of elastomer, is also provided on the opposite side of the transverse stop 17 facing the central axis 33.

Referring to Figures 3 and 4, the ring 10 is external to the support rod 3 and rotatably mounted around it. The ring 10 is arranged to be operated by the user and to communicate a movement to the arms 12, which are internal to the rod support 3. The arms 12 can thus be moved between an open position PO and a closed position PF. The open position PO makes it possible to introduce the lower end 6 of the rod C into the rod support 3, whereas the closed position PF makes it possible to lock the lower end 6 of the rod C in the rod support 3, to secure the safety tip 1 to the rod C. Advantageously, the arms 12 define a clamping circumference inside the rod support 3 which varies as a function of the rotational movement of the ring 10. In position open PO, the circumference is maximum, and allows the introduction of the lower end 6 of the rod C, while in closed position, the circumference is minimal and allows to lock the lower end 6 of the rod C by the intermediate of the arms 12, preventing any axial rotation of the ring 10. Between the open position PO and the closed position PF, the axial rotation movement communicated to the arms 12 makes it possible to vary the circumference, to make it correspond the diameter of the lower end 6 of the rod C introduced into the safety tip 1. The diameter of the lower end 6 of the rod C may be included in 12 mm and 25.4 mm which are the most common diameters. Of course, these values are given for information only and are not limiting. To move the arms 12, from the open position PO to the closed position PF, the ring 10 comprises a movement transformation element 11 which transforms the axial rotational movement of the ring 10 into a radial translation movement of the arms 12. More particularly, the ring 10 has in its interior volume three cams 11 equidistant from the central axis 33 forming said movement transformation element. Indeed, the inner diameter of the upper and lower half-rings 25, 26 comprises over all or part of their height the cams 11 which are defined by three curved and notched cam profiles 18, whose radius with respect to the central axis 33 is decreasing from the open position PO to the closed position PF, the cams 11 being each terminated by a shoulder 34. Of course, the number of cams 11 can vary, it being specified that the number three is optimal. The number of cams 11 is equal to the number of arms 12. Indeed, each arm 12 cooperates with a cam 11 as shown in Figures 3 and 4. As shown in Figure 3 in the open position PO, the transverse stop 17 of the arms 12 cooperates with the end of the cam profiles 18 whose radius is furthest from the central axis 3, so that the circumference defined between the three friction pads 19 is as large as possible. In this open position PO, the transverse stop 17 of each arm 12 bears against the shoulder 34 of the preceding cam 11, delimiting the open position PO and the angular displacement of the ring 10. Between the open position PO and the position closed PF, the respective transverse stops 17 of the arms 12 circulate along the respective toothed cam profiles 18.

The radius of the cam profiles 18 is decreasing relative to the central axis 33 so that as the transverse stops 17 move along the cams 18, the circumference defined between the three pads 19 decreases. Finally, in the closed position PF on a lower end 6 of a rod C, the friction pads 19 come into contact with the lower end 6 of the rod C and exert a friction force F towards the central axis 33 The transverse stops 17 can no longer move along the cam profiles 18 and are locked in position on each cam profile 18, which locks the lower end 6 of the rod C in the rod support 3. Because of this, that the arms 12 are locked on the cam profiles 18, any rotation of the ring 10 relative to the support rod 3 is prohibited.

The movement of the arms 12 relative to the cam profiles 18 makes it possible to vary the inner circumference of the rod support 3 between 11.5 mm and 26 mm in the example shown. Advantageously, this configuration allows the user to exert a small force on the actuating means 10, while ensuring effective locking of the safety tip 1 on the lower end 6 of the rod C. The tip safety 1 can thus be easily attached to the rod C, regardless of its diameter, type or strength of the user and without any tools. With reference to FIGS. 1 and 2, the cane support 3 is connected to the foot 2 by a connecting means 4. The cane support 3 is preferably made of polyacetal or any equivalent material. This connecting means 4 comprises a ball joint connection defined by a female ball 20, connected to the rod support 3, fitting on a male ball 21, connected to the foot 2. The female ball 20 is for example made of polyacetal loaded with bisulphide molybdenum or any similar material. It is extended by a female end piece 29 which receives a portion of a male end piece 30 of the cane support 3 forming a Morse taper described below. The male ball 21, made for example of polyacetal or the like, fits on a stud 28 of a base 27 defining the foot 2 to which it is secured.

As shown in FIG. 2, the ball joint 20, 21 allows an angle of inclination A corresponding to the angle between the axis of origin 35 perpendicular to the base 27 of the foot 2 and the central axis 33 of the rod support 3. Advantageously, this configuration makes it possible to authorize an angle of inclination A of between 0 degrees and an angle of inclination A threshold beyond which the female ball 20 can dislodge the male roture 21, this angle A threshold inclination being at least approximately between 25 and 35 degrees and preferably equal to 30 degrees. In addition, the ball joint allows the rod support 3 to rotate at an angle of 360 degrees around the original axis 35. As shown in Figure 2, the female ball 20 is open and defines a half-sphere , to allow said female ball 20 to be dislodged from said male ball 21 in the event of exceeding the threshold angle of inclination A. In addition, the connecting means 4 comprises a return member 22 in the form of a sleeve made for example of elastomer or any equivalent material. 11 is linked to the foot 2 and the cane support 3 in a constrained manner. To do this, the height of the return member 22, unconstrained and before assembly, is less than the height of the ball joint connection between the foot 2 and the rod holder 3. When assembling the endpiece 1, the return member 22 is arranged around the female ball 20 by means of a damping support 36, also in the form of a sleeve provided with a shoulder for resting on the upper end. the female endpiece 29. The shock absorber support 36 is made for example of polyacetal or any other equivalent material. The return member 22 comprises at its lower end a peripheral groove 37 jammed in force in the base 27 by a retaining ring 38 clipped into said base 27 and putting stress on the return member 22. The retaining ring 38 is made for example of polyamide or equivalent material. The return member 22 is thus tensioned in a constrained manner between the foot 2 and the rod support 3 to enable the rod support 3 to be brought back to a zero inclination angle A, coinciding with said original central axis. 35. This configuration aims to ensure the vertical position of the rod C and prevent it from falling to the ground. In addition, the return member 22 serves to maintain the engagement of the female ball 20 in the male ball 21 for an angle between 0 degrees and the angle of inclination A threshold. In the inclined position of the rod, the return member 22 compresses on the inclined side and is tensioned on the other side. Beyond this angle of inclination A threshold, the female ball 20 can dislodge the male ball 21 while being contained within the return member 22 which allows its automatic re-entry. Advantageously, the combination of the return member 22 and the open female ball 20 makes it possible not to break the safety tip 1, avoiding the rupture of the ball joint 20, 21, during an occasional passing of the ball. angle of inclination A threshold, and allowing its re-entry.

As shown in Figures 3 and 4, the foot 2 comprises a base 27 in the form of five-pointed star 24 which gives the best results in terms of stability. Of course, the present invention also extends to multi-branched stars and is not limited to a five-pointed star shape. This is made for example of polyamide or any other equivalent material. FIG. 1 shows that each branch 24 comprises a housing 39 into which a non-slip damping pad 40 protruding from the housing 39 is inserted, to be in direct contact with the ground, to prevent any slipping and to avoid using the base 27. Such non-slip damping pads 40 are for example made of bi-material elastomer such as polyamide and elastomer. Consequently, they make it possible to secure the person, to prevent premature wear of the foot 2, to absorb the unevenness of the ground, to dampen the impact of the mouthpiece with the ground and to ensure a good grip on the ground. the soil, even wet. Advantageously, the damping pads 40 are easily replaceable when worn. The base 27 may also comprise instead of shock pads 40 spikes (not shown) forming crampons to avoid slipping on frozen or snowy terrain. These tips can be interchangeable with the shock pads 40. They can also be mounted in dedicated housings (not shown) distributed on the surface of the base 27 in addition to the shock pads 40. They can also be provided on a separate part, subsequently called complementary security element 43, which can be mounted and dismounted on the base 27 by means of quick attachment without tools thus facilitating the adaptation of the cane to the climatic conditions.

During the final assembly, the assembly comprising the foot 2 assembled with the connecting means 4 and the return member 22 is connected to the support rod 3. This assembly is done by interlocking the male end 30 of the support 3, forming a Morse taper, in the female portion 29 of the female ball 20. The Morse taper 30 locks when it is introduced into the shock absorber support 36 and thus locks the assembly of all the component parts In addition, an anti-friction element 41, in the form of a flat washer, is disposed between the rod support 3 and the return member 22, for example made of Teflon® or the like, to enable the rotation of the ring 10 relative to the fixed return member 22. The shape of the antifriction element 41 is not limited to a flat washer, but may also consist of a washer comprising a lateral clamping ring, to allow clamping of the friction element 41 on the upper end of the return member 22. The clamping lateral ring is integral with the washer and the assembly forms a single piece. Preferably, the clamping is done in an adjusted and permanent manner by the clamping side ring on the upper end of the return member 22. This configuration makes it possible to avoid the deformation of the end of the return member 22 due to the rotation of the ring 10 and thus to prevent the return member 22 from disengaging. Of course, any other equivalent anti-friction means is conceivable.

Referring more particularly to Figures 5 to 7, a complementary security element 43 can also be coupled to the safety tip 1 to adapt the same rod to winter conditions, without the need to change cane. This security element 43 forms a separate part of the safety tip 1 and has a plurality of spikes 42 forming spikes to prevent slipping on frozen or snow-covered terrain, as shown in FIGS. 6A-7. Such spikes 42 are preferably made of steel or the like, and have the property of being able to sink in very hard ground and to increase the grip on these grounds. Preferably, the security element 43 has a shape complementary to the shape of the base 27 of the foot 2 of the end piece 1. In the example illustrated in FIGS. 5A and 5B, the security element 43 has a shape five-star star 45 arranged to be superimposed on the base 27 by shifting the branches 45 of the security element 43 between the branches 24 of the base 2. Each branch 45 of the security element 43 comprises a housing 46 located on its lower face 431 and in which is inserted a tip 42. As a result, each branch 45 has a tip 42. Of course, the present invention also extends to multi-branched stars and is not limited to to a star shape with five branches. The security element 43 is also provided with coupling means 44 disposed on its upper face 432 for easily coupling the security element 43 to the foot 2 removably and quickly, without the use of a tool. As shown in FIGS. 6A to 6C, the casting means 44 may consist of clipping tabs 44 or any other equivalent means, without this example being limiting. Each branch 45 has two clipping tabs 44 projecting and oriented to fit on the corresponding edges of the legs 24 of the base 27. Such coupling means 44 facilitate the mounting operation of the security element 43 on the safety tip 1. It advantageously results that it is possible to improve the safety of the tip 1 on hazardous terrain, such as frozen or snowy terrain without having to replace the safety tip 1 , or to change cane, and without the use of tools. In the example illustrated in FIGS. 6A to 7, the security element 43 is superimposed on the foot 2 of the security end piece 1 so that the upper face 432 of the security element 43 is under the base 27. In addition, the branches 45 of the star of the security element 43 are angularly offset relative to the branches 24 of the star of the base 27. In this way, each branch 45 of the security element 43 is disposed between two successive branches 24 of said base 27. This configuration allows optimal distribution of the pads 40 and 42 points under the foot 2, which increases the non-slip properties of the safety tip 1. Application possibilities industrial: It is clear from this description that the invention achieves the goals, namely to provide a safety tip universally adaptable to any diameter rod and allowing an occasional inclination greater than 30 of without risk for the user or the safety tip, while ensuring maximum safety for the person on any type of ground even wet, as well as stability in vertical position of rest and easy recovery of the rod in horizontal position. The present invention is not limited to the embodiment described but extends to any modification and variant obvious to a person skilled in the art.

Claims (18)

REVENDICATIONS1. Safety tip (1) for a rod comprising a foot (2) connected to a rod support (3) by at least one connecting means (4), said rod support (3) comprising at least one coupling means (10) , 12) arranged to receive and lock in position a lower end (6) of said rod, characterized in that said coupling means (10, 12) comprises at least one locking member (12) and at least one member of actuation (10), said actuating member (10) being arranged to be actuated manually and for moving said locking member (12) between an open position (PO) allowing insertion of the lower end (6) of a rod (C) and a closed position (PF) locking said lower end (6) of said rod (C) in said security tip (1) preventing its withdrawal. Safety tip according to claim 1, characterized in that said actuating member (10) is mounted in axial rotation about a central axis (33) on said cane support (3), and in that it comprises at least one movement transformation element (11) arranged to convert said axial rotational movement of said actuating member (10) into a radial translation movement of said locking member (12). 3. Safety tip according to claim 2, characterized in that said actuating member comprises at least one ring (10) provided in its internal volume with at least one cam (11) forming said element for transforming the movement, and in that said locking member comprises at least one arm (12) rotatably mounted about a pivot axis (13) on the rod support (3), the pivot axis (13) being parallel to said central axis (33) and said arm (12) being arranged to cooperate with said cam (11) between said open and closed positions (PO, PF). 4. Safety tip according to claim 3, characterized in that said ring (10) is formed by assembling a lower half-ring (25) and an upper half-ring (26). 5. safety tip according to claim 3, characterized in that said arm (12) comprises a lever (14) curved, a first end (15) comprises said pivot axis (13) and a second end (16) comprises d on the one hand a transverse stop (17) arranged to cooperate with a cam profile (18) of said cam (11) and on the other hand a friction pad (19) located opposite said transverse stop (17) arranged to exert a frictional force (F) on said lower end (6) of the rod (C) when it is inserted into said safety tip (1) and said locking member (12) is in the closed position ( FP). 6. Safety end piece according to claim 5, characterized in that said cam profile (18) is notched and has a decreasing radius, with respect to said central axis (33), from the open position (PO) to the closed position ( FP). 7. Safety tip according to claim according to any one of the preceding claims, characterized in that said connecting means (4) comprises a ball joint connection defined by a female ball joint (20), connected to said rod support (3), interlocking with a male ball joint (21), integral with said foot (2), allowing an angle of inclination (A) corresponding to the angle between the axis of origin (35) perpendicular to said foot (2) and the central axis (33) of said cane support (3). 8. Safety tip according to claim 7, characterized in that said female ball (20) is open and defines a half-sphere. 9. Safety tip according to any one of the preceding claims, characterized in that said connecting means (4) further comprises at least one return member (22) arranged to return the rod support (3) to an angled inclination (A) substantially zero coincides with said original axis (35) to ensure the vertical position of the rod (C) and to allow an inclination angle (A) of between 0 degrees and an inclination angle ( A) threshold beyond which said female ball (20) can dislodge said male ball (21). The tip of claim 9, said threshold angle (A) threshold is at least approximately between 25 and 35 degrees and preferably equal to 30 degrees. 11. Tip according to claim 9, characterized in that said return member (22) consists of a pre-stressed damping sleeve (23) of elastic material mounted around the ball joint (20, 21) and prestressed between said foot ( 2) and said cane support (3). 12. End piece according to any one of the preceding claims, characterized in that said foot (2) comprises a base (27) in the form of a star having five branches (24), each branch (24) carrying a damping pad (40). ) anti-slip. 13. Tip according to claim 12, characterized in that said base (27) further comprises a plurality of spikes (42) forming crampons. 14. End piece according to claim 12, characterized in that it comprises a complementary safety element (43) coupled to said foot (2) by coupling means (44) and arranged at least partly under said base (27), said security element (43) having a plurality of studs (42) forming crampons. 15. End piece according to claim 14, characterized in that said security element (43) has a star shape comprising five branches (45) each having a tip (42), and said security element (43) is assembled to said base (27) so that the branches (45) of the security element are angularly offset relative to the legs (24) of said base (27) so that each leg (45) of said security element (43) is arranged between two successive branches (24) of said base (27) 16. Tip according to claim 14, characterized in that said coupling means (44) comprise a plurality of clipping lugs (44) arranged to fit on said foot (2). 17. Security element (43) arranged to be coupled to a security tip (1) according to any one of claims 1 to 16, characterized in that it comprises coupling means (44) arranged to allow coupling at the foot (2) of said safety tip (1) and in that it comprises a plurality of spikes (42) forming crampons. 18. Rod having at least one arm provided at its upper end with gripping means, characterized in that it comprises at its lower end (6) a safety tip (1) according to any one of claims 1 to 16.