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Figure 16a and b shows a rotational friction brake 900 comprising two braking arms 91 6 arranged opposed to each other in the same fashion used in the rotational friction brake 400 shown in Fig. 10. The at least one braking arm 91 6 is arranged to frictionally engage the first body 910 on an inner peripheral wall of the first body 910. The rotational friction brake 900 further comprises a further body 913 arranged to rotate around the rotational center axis 914 of the second body 912. The second body 912 and the further body 913 are disc-shaped and located parallel to and at a distance from each other. The second body 912 comprises at least one elongated hole 937
arranged along a tangential direction of the second body 912 at a radial distance from the rotational center axis 914 longer than the radial distance between the rotational center axis 914 and the at least one pivot point 918. Each of the at least one elongated hole 937 is located such as to at least partially overlap each of the at least one braking arm 91 6. The further body 913 comprises at least one preventing member 936 (in the example: two preventing members) fixedly attached to the further body 913. The at least one preventing member 91 6 extends in a direction parallel to the rotational center axis 914 such that each of the at least one preventing member 936 protrudes through each of the at least one elongated hole 937. When rotating the further body 913 in relation to the second body 912, the at least one preventing member 936 may engage with the at least one braking arm such as to prevent the braking member 921 from frictionally engaging the first body 910. In other words, the at least one preventing member 936 is arranged to prevent the braking member 921 of each corresponding braking arm 91 6 from frictionally engaging the first body 910 when the further body 913 is rotated in relation to the second body 912 along a first rotational direction L.
An advantage with this design is that the first direction L is opposed to the operating rotational direction of the brake, i.e. the reference direction R. The rotational friction brake 900 is thus particularly well suited for applications involving elongated bendable objects on a spool. The advantage is described here using the fishing reel as an example.
In an embodiment of a fishing reel, the further body 913 is part of, or fixedly attached to a line spool, whereas the second body 912, comprising the one or more braking arms, is arranged to engage with the further body 913 by the one or more preventing members 936 protruding through the one or more elongated holes 937. During casting, when the further body 913 is forced, by the line, to rotate in the reference direction R, the second body 912 will, by means of the at least one preventing member 936 protrude through the at least one elongated hole 937, and thus be forced to rotate together with the further body 913. To avoid the at least one preventing member 937 to influence the at least one braking arm 91 6 unintentionally, the further body 913 may be arranged to lock to the second body 912 for example using a
clasp, magnet or the like. When rewinding the spool such as to retrieve the line, the second body 912 is to be rotated in the direction opposed to the reference direction R and it is thus desirable to deactivate the rotational friction brake 900 as the positive angular acceleration inflicted upon the second body during rewinding may activate the brake, thus making the rewinding process difficult. By connecting the second body 912 to a rewinding interface, such as a mechanical interface equipped with a drive mechanism (e.g. a rotational handle or a motor), a user of the fishing reel will be allowed to actively force the second body 912 to rotate along the first rotational direction L by rotating the handle to rewind the spool hence retrieving the line onto the spool. As the second body 912 is forced to rotate along the first rotational direction L, the further body 913, comprising the line spool, will be forced to rotate with the second body 912. The at least one preventing member 916 will disable the braking action of the at least one braking arm 91 6 of the second body 912. As long as the user actively retrieves the line and the second body 912 hence actively forces the further body 913 to rotate in the first rotational direction L, the rotational friction brake will be disabled thus allowing for an efficient and easy rewinding procedure.
The rotational friction brake 900 shown in Fig. 1 6a and b does not allow for disabling the braking without actively upholding the force exerted on the braking arms by the at least one preventing member. To overcome this problem, a locking mechanism may be used, the locking mechanism being adapted to secure the at least one braking arm in a position for which the braking member does not frictionally engage the further body. Fig. 17a and b shows a rotational friction brake 1000 allowing for such a disabling of the brake.
Fig. 17a shows a rotational friction brake 1000 similar to the rotational friction brake 900 as far as the braking action is concerned. The rotational friction brake 1000 does however have an alternative way of disabling the rotational friction brake. For the rotational friction brake 1000, the further body 1013 has a central portion 1040 rotationally attached to the second body 1012. The further body further comprises at least one preventing member 1036 (in the example: two preventing members) fixedly attached to the central portion 1040. The at least one preventing member 1036 extends outwardly along a generally radial direction from the rotational center axis 1014. The at least one preventing member 1036 may be curved. Each one from the at least one braking arm 1016 comprises an anchor pin 1044 extending along a direction parallel with the rotational center axis 1014 and directed away from the second body 1012. When rotating the further body 1013 along a first direction L in relation to the second body 1012, each of the at least one preventing member 1036 will make contact with an anchor pin 1044 on a corresponding braking arm 101 6, thus forcing the at least one braking arm 101 6 to a position for which the braking member 1021 does not frictionally engage with the first body 1010.
The rotational friction brake 1000 further comprises a locking
mechanism 1041 a,1041 b arranged to fix the at least one braking arm 101 6 in relation to the second body 1012 when the braking member 1021 is not frictionally engaging the first body 1010. The locking mechanism
1041 a,1041 b comprises at least one first locking member 1041 a arranged on the further body 1013 and at least one second locking member 1041 b arranged on the at least one braking arm 101 6. Each of the at least one first locking member 1041 a is arranged to lock onto a corresponding each of the at least one second locking member 1041 b, such that each of the at least one braking arm 1016 can be locked in relation to the further body 1013. For the rotational friction brake 1000, the at least one first locking member 1041 a is at least one recess located along the peripheral edge of the central portion 1040 of the further body 1013. Similarly, the at least one second locking member 1041 b is at least one protrusion on an edge of the at least one braking arm 1016. The locking mechanism 1041 a,1041 b is arranged such as to allow locking the at least one braking arm 101 6 such that the at least one braking arm 1016 is not movable in relation to the second body 1012 in a position where the braking member 1021 does not frictionally engage the first body 1010. This position is shown in Fig. 17b.
The person skilled in the art realizes that the claimed rotational friction brake by no means is limited to the preferred embodiments described above.
On the contrary, many modifications and variations are possible within the scope of the appended claims.
For example, braking arms of different design may be used on the same rotational friction brake. The braking arms may be arranged to frictionally engage the first body in different ways. The braking arms may be arranged to activate at different threshold levels of the acceleration of the second body.
Additionally, variations to the disclosed embodiments can be understood and effected by the skilled person in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims.
arranged along a tangential direction of the second body 912 at a radial distance from the rotational center axis 914 longer than the radial distance between the rotational center axis 914 and the at least one pivot point 918. Each of the at least one elongated hole 937 is located such as to at least partially overlap each of the at least one braking arm 91 6. The further body 913 comprises at least one preventing member 936 (in the example: two preventing members) fixedly attached to the further body 913. The at least one preventing member 91 6 extends in a direction parallel to the rotational center axis 914 such that each of the at least one preventing member 936 protrudes through each of the at least one elongated hole 937. When rotating the further body 913 in relation to the second body 912, the at least one preventing member 936 may engage with the at least one braking arm such as to prevent the braking member 921 from frictionally engaging the first body 910. In other words, the at least one preventing member 936 is arranged to prevent the braking member 921 of each corresponding braking arm 91 6 from frictionally engaging the first body 910 when the further body 913 is rotated in relation to the second body 912 along a first rotational direction L.
An advantage with this design is that the first direction L is opposed to the operating rotational direction of the brake, i.e. the reference direction R. The rotational friction brake 900 is thus particularly well suited for applications involving elongated bendable objects on a spool. The advantage is described here using the fishing reel as an example.
In an embodiment of a fishing reel, the further body 913 is part of, or fixedly attached to a line spool, whereas the second body 912, comprising the one or more braking arms, is arranged to engage with the further body 913 by the one or more preventing members 936 protruding through the one or more elongated holes 937. During casting, when the further body 913 is forced, by the line, to rotate in the reference direction R, the second body 912 will, by means of the at least one preventing member 936 protrude through the at least one elongated hole 937, and thus be forced to rotate together with the further body 913. To avoid the at least one preventing member 937 to influence the at least one braking arm 91 6 unintentionally, the further body 913 may be arranged to lock to the second body 912 for example using a
clasp, magnet or the like. When rewinding the spool such as to retrieve the line, the second body 912 is to be rotated in the direction opposed to the reference direction R and it is thus desirable to deactivate the rotational friction brake 900 as the positive angular acceleration inflicted upon the second body during rewinding may activate the brake, thus making the rewinding process difficult. By connecting the second body 912 to a rewinding interface, such as a mechanical interface equipped with a drive mechanism (e.g. a rotational handle or a motor), a user of the fishing reel will be allowed to actively force the second body 912 to rotate along the first rotational direction L by rotating the handle to rewind the spool hence retrieving the line onto the spool. As the second body 912 is forced to rotate along the first rotational direction L, the further body 913, comprising the line spool, will be forced to rotate with the second body 912. The at least one preventing member 916 will disable the braking action of the at least one braking arm 91 6 of the second body 912. As long as the user actively retrieves the line and the second body 912 hence actively forces the further body 913 to rotate in the first rotational direction L, the rotational friction brake will be disabled thus allowing for an efficient and easy rewinding procedure.
The rotational friction brake 900 shown in Fig. 1 6a and b does not allow for disabling the braking without actively upholding the force exerted on the braking arms by the at least one preventing member. To overcome this problem, a locking mechanism may be used, the locking mechanism being adapted to secure the at least one braking arm in a position for which the braking member does not frictionally engage the further body. Fig. 17a and b shows a rotational friction brake 1000 allowing for such a disabling of the brake.
Fig. 17a shows a rotational friction brake 1000 similar to the rotational friction brake 900 as far as the braking action is concerned. The rotational friction brake 1000 does however have an alternative way of disabling the rotational friction brake. For the rotational friction brake 1000, the further body 1013 has a central portion 1040 rotationally attached to the second body 1012. The further body further comprises at least one preventing member 1036 (in the example: two preventing members) fixedly attached to the central portion 1040. The at least one preventing member 1036 extends outwardly along a generally radial direction from the rotational center axis 1014. The at least one preventing member 1036 may be curved. Each one from the at least one braking arm 1016 comprises an anchor pin 1044 extending along a direction parallel with the rotational center axis 1014 and directed away from the second body 1012. When rotating the further body 1013 along a first direction L in relation to the second body 1012, each of the at least one preventing member 1036 will make contact with an anchor pin 1044 on a corresponding braking arm 101 6, thus forcing the at least one braking arm 101 6 to a position for which the braking member 1021 does not frictionally engage with the first body 1010.
The rotational friction brake 1000 further comprises a locking
mechanism 1041 a,1041 b arranged to fix the at least one braking arm 101 6 in relation to the second body 1012 when the braking member 1021 is not frictionally engaging the first body 1010. The locking mechanism
1041 a,1041 b comprises at least one first locking member 1041 a arranged on the further body 1013 and at least one second locking member 1041 b arranged on the at least one braking arm 101 6. Each of the at least one first locking member 1041 a is arranged to lock onto a corresponding each of the at least one second locking member 1041 b, such that each of the at least one braking arm 1016 can be locked in relation to the further body 1013. For the rotational friction brake 1000, the at least one first locking member 1041 a is at least one recess located along the peripheral edge of the central portion 1040 of the further body 1013. Similarly, the at least one second locking member 1041 b is at least one protrusion on an edge of the at least one braking arm 1016. The locking mechanism 1041 a,1041 b is arranged such as to allow locking the at least one braking arm 101 6 such that the at least one braking arm 1016 is not movable in relation to the second body 1012 in a position where the braking member 1021 does not frictionally engage the first body 1010. This position is shown in Fig. 17b.
The person skilled in the art realizes that the claimed rotational friction brake by no means is limited to the preferred embodiments described above.
On the contrary, many modifications and variations are possible within the scope of the appended claims.
For example, braking arms of different design may be used on the same rotational friction brake. The braking arms may be arranged to frictionally engage the first body in different ways. The braking arms may be arranged to activate at different threshold levels of the acceleration of the second body.
Additionally, variations to the disclosed embodiments can be understood and effected by the skilled person in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims.
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