DEVICE FOR APPLYING A REMOVABLE SUBSTANCE IN THE FORM OF A STICK

Abstract

A device for applying a removable substance in the form of a baton, has a substance carrier and a protective sleeve so that the substance carrier can be made to move relative to the protective sleeve. A movement part has a longitudinal slot in which the substance carrier is guided by a peg, and the substance carrier can be moved between a retracted position and an extended position. The longitudinal slot has a retaining portion assigned to the extended position, the central longitudinal axis of which runs at an angle to a central longitudinal axis of a movement portion of the longitudinal slot. The central longitudinal axis of the retaining portion and the central longitudinal axis of the movement portion enclose an obtuse angle.

Claims

1-12. (canceled)

13. A device (1) for applying a transferable substance (M) in the form of a stick, comprising: a substance carrier (2), a protective sleeve (4) for the substance carrier (2), wherein the substance carrier (2) is configured to be displaced relative to the protective sleeve (4) in order to displace a free end region of the substance (M) into a freely projecting position, and a movement part (5) with a longitudinal slot (6, 6′), in which the substance carrier (2) is guided with a peg (7) engaging into the longitudinal slot (6, 6′) such that the substance carrier (2) can be moved between a retracted position and an extended position, wherein the longitudinal slot (6, 6′) has a retaining portion (9) assigned to the extended position, wherein a central longitudinal axis (y) of said retaining portion extends at an angle to a central longitudinal axis (z) of a movement portion (8) of the longitudinal slot (6, 6′), wherein the central longitudinal axis (y) of the retaining portion (9) and the central longitudinal axis (z) of the movement portion (8) include an obtuse angle (a), wherein the substance carrier (2) is accommodated in a counter-retaining cylinder (3), in an inner wall of which a control groove (26) for the peg (7) is formed, wherein the control groove (26) has assigned to the extended position an inclined surface (27) that leads to a transition to the cylindrical inner surface (28) of the counter-retaining cylinder (3), and wherein the peg (7) is not or only partially in overlap with the inclined surface (27) in the extended position.

14. A device (1) for applying a transferable substance (M) in the form of a stick, comprising: a substance carrier (2), a protective sleeve (4) for the substance carrier (2), wherein the substance carrier (2) is configured to be displaced relative to the protective sleeve (4) in order to displace a free end region of the substance (M) into a freely projecting position, and a movement part (5) with a longitudinal slot (6, 6′), in which the substance carrier (2) is guided with a peg (7) engaging into the longitudinal slot (6, 6′), such that the substance carrier (2) can be moved between a retracted position and an extended position, wherein the longitudinal slot (6, 6′) has a retaining portion (9) assigned to the extended position, wherein a central longitudinal axis (y) of said retaining portion extends at an angle to a central longitudinal axis (z) of a movement portion (8) of the longitudinal slot (6, 6′), wherein friction cams (24) are formed on the substance carrier (2) and in frictional contact with the inner surface (29) of the movement part (5) during the displacement of the substance carrier (2), wherein the friction cams (24) are designed non-circular with a longer dimension (a) and a shorter dimension (b), and wherein the longer dimension (a) essentially is realized in a direction of the movement portion (8), and wherein, in a view of an outer edge (25) of the friction cam (24) from radially outside, the greatest dimension in the transverse direction is realized eccentric to the greatest dimension in the longitudinal direction.

15. The device according to claim 13, wherein the retaining portion (9) has a catch projection (31), which is configured to be overrun by the peg (7), in order to retain the substance carrier (2) in the extended position.

16. The device according to claim 13, wherein two opposing longitudinal slots (6, 6′) are formed.

17. The device according to claim 16, wherein an overrunnable catch projection (31) is formed in the respective retaining portion (9) of both longitudinal slots (6, 6′).

18. The device according to claim 16, wherein two pegs (7) are provided for respectively engaging into one of the longitudinal slots (6, 6′).

19. The device according to claim 18, wherein a control groove (26) is formed in the counter-retaining cylinder (3) for each peg (7).

20. The device according to claim 19, wherein both control grooves (26) have an inclined surface (27) assigned to the extended position.

21. New): The device according to claim 14, wherein, in a standing position of the device (1), in which its longitudinal axis (x) essentially is oriented vertically and the opening for displacing the substance (M) outward in a sliding manner is directed upward, the greatest dimension in the transverse direction is realized underneath a center of the greatest dimension in the longitudinal direction of the catch projection (31).

22. The device according to claim 14, wherein the outer edge (25) of the friction cam (24) has a drop-shaped contour.

23. The device according to claim 13, wherein the obtuse angle is between 100 and 170 degrees.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The invention is described in greater detail below with reference to the attached drawings, which merely show an exemplary embodiment. In these drawings:

[0045] FIG. 1 shows a view of a device of the type in question concerning a closed storage position of the device;

[0046] FIG. 2 shows a perspective exploded view of the device with a movement part, a substance carrier, a counter-retaining cylinder and a covering cap;

[0047] FIG. 3 shows an individual view of the movement part together with an enlarged detail;

[0048] FIG. 4 shows the section along the line IV-IV in FIG. 3;

[0049] FIG. 5 shows the section along the line V-V in FIG. 3 together with a corresponding enlarged detail;

[0050] FIG. 6 shows a view, which in comparison with the illustration in FIG. 3 is rotated about a longitudinal axis of the movement part by 180 degrees, together with an enlarged detail;

[0051] FIG. 7 shows an individual perspective view of the substance carrier;

[0052] FIG. 8 shows a view of the substance carrier in the direction of the arrow VIII in FIGS. 7 together with an enlarged detail;

[0053] FIG. 9 shows another view of the substance carrier, which in comparison with FIG. 8 is rotated about a longitudinal axis of the substance carrier by 90 degrees;

[0054] FIG. 10 shows a rear view of the substance carrier illustrated in FIG. 8;

[0055] FIG. 11 shows the section along the line XI-XI in FIG. 8 together with an enlarged detail;

[0056] FIG. 12 shows the section along the line XII-XII in FIG. 10 together with an enlarged detail;

[0057] FIG. 13 shows the section along the line XIII-XIII in FIG. 8 together with an enlarged detail;

[0058] FIG. 14 shows an individual perspective view of the counter-retaining cylinder;

[0059] FIG. 15 shows a longitudinal section through the counter-retaining cylinder;

[0060] FIG. 16 shows the enlarged section along the line XVI-XVI in FIG. 15;

[0061] FIG. 17 shows a partially sectioned representation of the device after the removal of the cap, wherein the substance carrier is arranged in a maximally retracted position;

[0062] FIG. 18 shows an enlarged detail of the region XVIII in FIG. 17 concerning a catch-secured retracted position of a peg of the substance carrier in a retaining portion of the movement part;

[0063] FIG. 19 shows a detail corresponding to FIG. 18, but concerning an overrunning position of the peg by overcoming the catch projection in the retaining portion;

[0064] FIG. 20 shows a representation according to FIG. 17, but concerning a respective view or sectioned view, which in comparison with the illustration in FIG. 17 is rotated about the longitudinal axis of the device by 180 degrees;

[0065] FIG. 21 shows an enlarged detail of the region XXI in FIG. 20;

[0066] FIG. 22 shows a detail corresponding to FIG. 21, but concerning an intermediate position according to FIG. 19;

[0067] FIG. 23 shows the section along the line XXIII-XXIII in FIG. 17;

[0068] FIG. 24 shows the section along the line XXIV-XXIV in FIG. 23;

[0069] FIG. 25 shows a longitudinal section through the device concerning an intermediate position of the substance carrier between a retracted position and an extended position;

[0070] FIG. 26 shows a representation corresponding the

[0071] FIG. 17, but concerning the maximally extended position of the substance carrier;

[0072] FIG. 27 shows an enlarged detail of the region XXVII in FIG. 26;

[0073] FIG. 28 shows a representation corresponding to FIG. 20, but concerning the substance carrier position according to FIG. 26;

[0074] FIG. 29 shows an enlarged detail of the region XXIX in FIG. 28,

[0075] FIG. 30 shows a representation corresponding to FIG. 29, but concerning an intermediate position in the course of overrunning a catch projection of the retaining portion accommodated by the peg of the substance carrier in the maximally extended position;

[0076] FIG. 31 shows the section along the line XXXI-XXXI in FIG. 26; and

[0077] FIG. 32 shows the section along the line XXXII-XXXII in FIG. 21.

DESCRIPTION OF THE EMBODIMENTS

[0078] A device 1 for applying a transferable substance M in the form of a stick is initially described with reference to the illustrations in FIGS. 1 and 2.

[0079] FIG. 2, in particular, shows that the device 1 essentially is composed of a substance carrier 2, a protective sleeve forming a counter-retaining cylinder 3 and a movement part 5.

[0080] The movement part 5 has a longitudinal slot 6, in which a peg 7 of the substance carrier 2 is guided, wherein the longitudinal slot 6 is composed of a movement portion 8, which extends parallel to a longitudinal axis x of the device 1, and a retaining portion 9 extending at an angle thereto.

[0081] The device 1, which according to the graphic representations may be realized in the form of a lipstick, furthermore may comprise a cap-shaped sleeve part 10 that serves as a protective cover for the substance M in the retracted non-usage position according to FIG. 1.

[0082] The device 1 as a whole may be realized in the form of a rotationally symmetrical cylinder and have a longitudinal axis x that forms the rotational axis. In this case, a longitudinal extent in the axial direction may approximately correspond to 3-times to 5-times, furthermore approximately 4-times, an outside diameter dimension measured transverse to the longitudinal axis x.

[0083] All parts of the device 1 preferably are made of plastic, particularly the same plastic, especially a rigid plastic, and furthermore respectively manufactured, for example, in a plastic injection moulding process. For example, all parts of the device 1 may consist of polypropylene.

[0084] The movement part 5, which is also illustrated individually in FIGS. 3 to 6, essentially is composed of portions that are arranged behind one another in the axial direction and preferably can be combined integrally and uniformly in material. A circular-cylindrical handling section 11 is thereby initially formed in the exemplary embodiment shown. This handling section may have an outside diameter that is adapted to the outside diameter of the sleeve part 10 and approximately extend in the axial direction over one-fourth of the total length of the device 1.

[0085] The handling section 11 may transform into a collar section 12, the diameter of which is reduced in comparison with the handling section 11, in a step-like manner. The outside diameter of this collar section preferably can be adapted to the inside diameter of the sleeve part 10 such that an attached sleeve part can in a preferred embodiment be supported on the step being formed between the handling section 11 and the collar section 12 with its end face.

[0086] Friction projections 13 provided on the outer wall of the collar section 12 interact with the inner wall surface of the sleeve part 10 in this closed position of the device. In this way, a frictional contact is produced in the closed position of the device and initially has to be overcome in order to remove the sleeve part 10.

[0087] Furthermore, a tubular guide section 14 follows this collar section 12 in the axial direction and has an outside diameter, which preferably is chosen smaller than the outside diameter of the collar section 12.

[0088] The outside diameter of the guide section 14 essentially is dimensionally adapted to the inside diameter of the movement part 5, wherein it is furthermore preferred that the outside diameter of the movement part 14 is in turn adapted to the outside diameter of the collar section 12. This may accordingly result in the formation of a step between the collar section 12 and the guide section 14, wherein the facing end face of the altogether sleeve-like movement part 5 can be supported on the free circumferential end face of said step.

[0089] The guide section 14 may carry a circumferential retaining collar 15, which protrudes radially outward, in the region of its free end that faces away from the handling section 11, wherein said retaining collar preferably has an outside diameter that is adapted to the outside diameter of the counter-retaining cylinder 3.

[0090] In this way, the counter-retaining cylinder 3 may be axially retained between the retaining collar 15 and the collar section 12 in an essentially non-displaceable manner, but the counter-retaining cylinder 3 preferably is freely rotatable relative to the movement part 5 about the longitudinal axis x.

[0091] Two longitudinal slots 6, 6′ are provided in the guide section 14 diametrically opposite of one another with respect to the longitudinal axis x. These longitudinal slots essentially extend in alignment with the longitudinal axis x at least with a movement portion 8.

[0092] The ends of these movement portions 8 respectively transform into retaining portions 9 in 16, wherein a central longitudinal axis y of such a retaining portion 9 or 16 and a central longitudinal axis z of the movement portion 8 may according to the enlarged details in FIGS. 3 and 6 include an obtuse angle a of approximately 110 to 115 degrees.

[0093] With respect to a top view of the device 1, in which the longitudinal axis x is illustrated in the form of a point, the retaining portions 9 of the longitudinal slots 6 and 6′, which are assigned to the free end of the guide section 14, may be provided such that they are directed in the clockwise direction whereas the retaining portions 16 assigned to the end of the guide section 14 facing the collar section 12 may be realized such that they are directed in the counterclockwise direction.

[0094] Furthermore, the [text missing] to the free end of the guide section 14 are in a side view according to the illustrations in FIGS. 3 and 6 angled upward in the direction of the free end whereas the lower retaining portions 16 are angled downward in the direction of the collar section 12.

[0095] The upper retaining portions 9 defining a maximally extended position of the substance carrier 2 respectively may end at an axial distance from the free end or from the retaining collar 15 of the movement part 5 whereas the lower retaining portions 16 defining the retracted position essentially may end in the transition to the collar section 12 and optionally run into the step plane.

[0096] The peripheral wall of the guide section 14 may have bore-like openings 17 circumferentially offset to the respective end regions of the retaining portions 9 and 16. These openings can serve for improving the removability of the movement part 5 from a mould in the course of its preferred manufacture in a plastic injection moulding process.

[0097] The illustration in FIG. 3, in particular, furthermore shows that the longitudinal slot 6′ extends beyond the region of the inlet into the upper retaining portion 9, preferably as far as the retaining collar 15, whereas the movement portion 8 of the longitudinal slot 6 ends according to the illustration in FIG. 6 with the transition into the retaining portion 9.

[0098] The retaining collar 15 may be separated by a radial separation 18 in the region of the extended longitudinal slot 6′ in order to allow an advantageous installation of the substance carrier 2.

[0099] The substance carrier 2, which acts in a piston-like manner, is individually illustrated in FIGS. 7 to 13.

[0100] The substance carrier 2 initially and essentially comprises a circumferential carrier wall 19 and a carrier bottom 20 that is recessed transverse thereto. In the normal operating position, e.g. according to FIG. 17, the substance carrier 2 has a cup opening 21, which is delimited by the carrier wall 19 and the carrier bottom 20 and open toward the top. The bottom side of the substance M, e.g. in the form of a lip care stick, is accommodated in this cup-shaped section of the substance carrier 2.

[0101] Multiple webs 22, which are directed radially inward, may be integrally formed on the inner side of the cup, particularly on the inner side of the carrier wall 19, in uniform circumferential distribution in order to positively connect the substance M to the substance carrier 2. With respect to a cross section transverse to the longitudinal axis x according to FIG. 13, as well as the enlarged detail in FIG. 13, these webs may starting from the inner wall surface be shaped such they extend radially inward in a pointed manner similar to blades.

[0102] According to the exemplary embodiment shown, eight webs 22 of this type may be distributed over the circumference.

[0103] The webs 22 extend in the axial direction starting from the carrier bottom 20 and according to the illustration in FIG. 12 end at a distance from the free outer edge of the cup opening 21.

[0104] The carrier wall 19 extends beyond the underside of the carrier bottom 20, e.g. with an axial length that approximately corresponds to half or one-third of the axial length of the carrier wall 19, in order to form the cup for accommodating the substance M.

[0105] The illustrations in FIGS. 7 to 10, in particular, show that the carrier wall 19 does not necessarily have to be provided over the entire circumference in this section extending on the underside of the carrier bottom 20. According to the exemplary embodiment shown, two wall sections 23 with different circumferential extents may be formed over the circumference.

[0106] Radially protruding friction cams 24 may be integrally formed on the outer side of these wall sections 23 as shown. For example, three friction cams 24 of this type may altogether be distributed over the circumference.

[0107] With respect to a view from radially outside according to the illustration in FIG. 8 or FIG. 10, each friction cam 24 essentially may have a drop-shaped outer edge, i.e. a drop-shaped contour 25, with a longer dimension a and a shorter dimension b, wherein the longer dimension a essentially extends in the direction of the longitudinal axis x and therefore in the direction of the movement portion 8 of the longitudinal slots 6 and 6′. The shorter dimension b may extend perpendicular thereto, preferably in essentially the circumferential direction.

[0108] In this case, a greatest dimension of a friction cam 24 along a line u extending in the circumferential direction furthermore may extend eccentric to a center line w referred to a greatest dimension along a line v in the longitudinal direction, with respect to the illustrations preferably underneath said center line and accordingly facing away from the substance M to be accommodated (see, in particular, the enlarged detail in FIG. 8).

[0109] The enlarged detail in FIG. 12, in particular, furthermore shows that a drop shape of the friction cam 24 is also formed with respect to the radially outward elevation. The friction cam 24 protrudes in a bulging manner and has a radially outer reversal point, which with respect to a vertical section according to FIG. 12 essentially lies approximately in the region of the line u representing the greatest dimension in the transverse direction.

[0110] The maximum radial protruding dimension c of such a friction cam 24 may approximately correspond to one-third to one-fourth of the greatest dimension of the friction cam 24 in the circumferential direction along the line u.

[0111] In addition, two diametrically opposed pegs 7 are provided on the outer side of the carrier wall 19 at approximately the axial height of the carrier bottom 20. These pegs 7 essentially may be realized circular-cylindrical and made of a solid material as shown.

[0112] The diameter of the pegs 7 preferably can be adapted to the circumferentially measured clearance between the facing outer edges of the movement portions 8 of the longitudinal slots 6 and 6′.

[0113] In other respects, the retaining portions 9 in 16 are likewise adapted to this clearance such that the pegs 7 are also securely guided during a corresponding displacement of the substance carrier 2 in the region of the retaining portions 9 and 16.

[0114] The counter-retaining cylinder 3 is on its inner side provided with two control grooves 26, which with respect to the cylinder axis x are offset relative to one another by 180 degrees and rise along the inner peripheral wall in the form of screw threads. According to the exemplary embodiment shown, these control grooves 26, which are realized similar to a double thread, extend over approximately 2.5 revolutions with a preferably constant pitch, namely from the end of the counter-retaining cylinder 3 facing the collar section 12 in the direction of the end covered by the retaining collar 15.

[0115] In this case, the control grooves 26 may taper off freely in the end face of the counter-retaining cylinder 3, which optionally is supported on the collar section 12, whereas the opposite ends preferably end at a distance from the end of the counter-retaining cylinder 3 on the side of the retaining collar.

[0116] The illustrations in FIGS. 15 and 16, in particular, show that the control groove end, which is formed at a distance from the end region of the counter-retaining cylinder 3, preferably can lead into an inclined surface 27 that ultimately transforms into the inner surface 28 of the counter-retaining cylinder 3, optionally with uniform reduction of the groove depth.

[0117] The substance carrier 2 is arranged in the device 1 in such a way that it is encompassed by the guide section 14 of the movement part 5, as well as by the counter-retaining cylinder 3 that at the same time encompasses the guide section 14.

[0118] The pegs 7 of the substance carrier 2 extend through the longitudinal slots 6 and 6′ of the movement part 5 in this case and penetrate into the control grooves 26 of the counter-retaining cylinder 3 with their radially outer end sections.

[0119] The friction cams 24 are in frictional contact with the inner surface 29 of the movement part 5 or the guide section 14, respectively.

[0120] As a result of this arrangement, a relative rotational displacement between the counter-retaining cylinder 3 and the movement part 5 can be achieved by holding the device 1 on the counter-retaining cylinder 3 and by taking hold of and rotating the movement portion 8 in the region of the handling section 11, wherein the substance carrier 2 can thereby be moved in the direction of the longitudinal axis x along the longitudinal slots 6 and 6′ by means of the pegs 7 guided in the control grooves 26 of the counter-retaining cylinder 3.

[0121] FIGS. 17 to 24 show a lowermost and therefore maximally retracted position of the substance carrier 2 and of the substance M carried by the substance carrier 2.

[0122] The section in FIG. 24, in particular, shows that the substance carrier 2 can in this case be supported on the base of the lower retaining portion 16 defining the retracted position by means of its peg 7, optionally directly on the step that is formed between the collar section 12 and the guide section 14 and into which the base of the retaining portion 16 can run.

[0123] This maximally retracted position may be designed such that it can be overrun opposite to the normal rotating direction for displacing the substance carrier 2 in the direction of the extended position. This effect can be promoted by the control grooves 26, which are tapered off freely without edges toward this end of the counter-retaining cylinder 3.

[0124] The position of the peg 7 in the lower retaining portion 16 is illustrated, for example, in FIGS. 18 and 21. These figures furthermore show that at least one retaining portion 16 of a longitudinal slot (in this case the longitudinal slot 6′) has a catch projection 30 that can be overrun by the peg 7. This catch projection 30 may form a constriction of the clear passage dimension of the retaining portion 16.

[0125] The passage dimension d of the retaining portion 16, which is reduced by the catch projection 30, may approximately correspond to 0.9-times to 0.95-times the diameter dimension e of the peg 7 (compare to FIG. 18).

[0126] FIG. 19 shows an intermediate position, in which the peg 7 overcomes the catch projection 30. Accordingly, the catch projection 30 can only be overcome intentionally due to a relative rotational displacement caused by the user. The catch projection 30 can be overrun as a result of the design of the components of an elastic plastic material.

[0127] The retaining portion 16 of the other longitudinal slot 6 is not provided with such a catch projection 30 in the exemplary embodiment shown. However, it would in this respect also be conceivable to form catch projections 30 in the region of both lower retaining portions 16.

[0128] Once the catch projection 30 has been overcome, the substance carrier 2 leaves the retracted position and is successively advanced axially along the movement portion 8 of the longitudinal slots 6 and 6′ as a result of a relative rotational displacement between the movement part 5 and the counter-retaining cylinder 3 in order to displace the substance M beyond the openly designed free end of the counter-retaining cylinder 3 and the movement part 5.

[0129] The maximally possible extended position is illustrated in FIGS. 26 to 32. In this case, the pegs 7 are after passage of the movement portions 8 of both longitudinal slots 6 and 6′ moved into the retaining portions 9 extending at an obtuse angle thereto. In the process, the substance carrier 2 carries out a rotational movement about the longitudinal axis x by a few degrees, e.g. approximately 10 degrees, together with the substance M accommodated therein as it is also the case when leaving the retracted position.

[0130] The maximally extended position is defined as a result of a stop limitation in the retaining portions 9. This maximally extended position preferably can be designed such that it cannot be overrun. For example, the respective peg 7 may be captured between facing outer edges of the control grooves 26 and the retaining portion 9.

[0131] The illustration in FIG. 29, in particular, a furthermore shows that the maximally extended position may also be secured by an additional catch projection 31. According to the exemplary embodiment shown, such a catch projection 31 may be provided in a retaining portion 9, preferably in the retaining portion 9 of the longitudinal slot 6. In the exemplary embodiment shown, the retaining portion 9 of the other longitudinal slot 6′ is not provided with such a catch projection 31 although this would be readily possible in another embodiment.

[0132] The catch projection 31 and the catch projection 30 in the region of the lower retaining portion 16 essentially may be designed identically. In this respect, identical relations between the passage dimension d in the region of the retaining portion 9, which is reduced by the catch projection 31, and the diameter e of the peg 7 may be realized.

[0133] FIG. 30 shows a situation, in which the peg 7 overruns the catch projection 31. Accordingly, the withdrawal from the maximally extended position also can only be realized intentionally due to a relative rotation caused by the user.

LIST OF REFERENCE SYMBOLS

[0134] 1 Device [0135] 2 Substance carrier [0136] 3 Counter-retaining cylinder [0137] 4 Protective sleeve [0138] 5 Movement apart [0139] 6 Longitudinal slot [0140] 6′ Longitudinal slot [0141] 7 Peg [0142] 8 Movement portion [0143] 9 Retaining portion [0144] 10 Sleeve part [0145] 11 Handling section [0146] 12 Collar section [0147] 13 Friction projection [0148] 14 Guide section [0149] 15 Retaining collar [0150] 16 Retaining portion [0151] 17 Opening [0152] 18 Radial separation [0153] 19 Carrier wall [0154] 20 Carrier bottom [0155] 21 Cup opening [0156] 22 Web [0157] 23 Wall section [0158] 24 Friction cam [0159] 25 Outer edge [0160] 26 Control groove [0161] 27 Inclined surface [0162] 28 Inner surface [0163] 29 Inner surface [0164] 30 Catch projection [0165] 31 Catch projection [0166] a Dimension [0167] b Dimension [0168] c Dimension [0169] d Dimension [0170] e Diameter [0171] u Line [0172] v Line [0173] w Center line [0174] x Longitudinal axis [0175] y Central longitudinal axis [0176] z Central longitudinal axis [0177] M Substance [0178] a Angle