A HAND OPERATED BRAKE

Abstract: A hand-operated brake consisting of a handle (3), which is pivoting to and from a neutral position in a pivot (4, 5) of a support (2), which handle (3) has a point of attachment (6) at a distance from the pivot (4, 5) for catching one end of a wire (8), which is surrounded by a tubular cover (14), the other end of the wire actuating a brake device. Normally, a first lever is used in order to perform normal braking and a second lever for performing a parking brake function. It is now suggested to use only one lever for the two functions by that the end of the tubular cover (14) which is close to the point of attachment, bears on a stop means (9), which is movable between two end positions within the support (2). The first end position is used when carrying out normal braking. The second end position is used for carrying out the parking brake function.

Description: A hand operated brake This invention relates to an arrangement at hand-operated brakes consisting of a handle, which is pivoting in a pivot of a support, which handle, at a distance from the pivot, has a point of attachment for one end of a wire, which is surrounded by a tubular cover, the other end of the wire actuating a brake device . A hand-operated brake device of this type is disclosed in SE- A-9200906-7, which hand-operated brake can be said to have two functions, one being a normal braking by pulling the handle and the second being a parking brake function when the handle instead for being pulled, is pushed from a neutral position to a fixed position. The known arrangement is of a somewhat complicated design because it demands more than one lever to make the two functions possible. It is an object of this invention to make the two brake functions possible by means of one and the same lever. The inventive idea is thereby that the normal braking is carried out by pulling the wire by means of the handle while when operating the parking brake function, the wrapping surrounding the wire is actuated. The characterizing features of the invention are stated in the enclosed claims. An embodiment of the invention will now be described with reference to enclosed drawings. Fig. 1 is hereby a longitudinal section through a device according to the invention when the handle is in its neutral position. Fig. 2 is the same as figure 1 but the handle is pulled for braking. Fig. 3 is the same as the foregoing figures but the handle is in parking brake position. In fig. 1 the device according to the invention is generally indicated by 1. The device can be said to be a hand-operated device for operating a brake of a bike, walking chair or the same. The device includes as usual a support 2, which can be fixed for instance on a not shown handle bar. The support 2 is in the form of a housing and within it there is a brake handle 3 pivotingly supported by a pivot 4, which is fixed in the support 2. As can be seen the pivot 4 co-operates with an ob- long hole 5 in the brake handle 3. The extension of the oblong hole is mainly downwards towards a point of attachment 6 for the end 7 of a wire. This will be described more in detail in the following. The point of attachment 6 is in the form of a hook so that the end 7 of the wire can be detached. A brake wire 8 and its surrounding tubular cover 14 actuates the not shown brake. This is accomplished in known manner by that the wire 8 is pulled into the support 2 by that the handle is pivoted around the pivot 4 while the two ends of the tubular cover are fixed. The end of the tubular cover 14 bears on stop means 9, which is movable backwards and forwards in the support 2. This motion for the stop means 9 into the support 2 is delimited by the left side of a shoulder part 10, see fig. 2. The shoulder part 10 is fixed in relation to the support 2. The shoulder part 10 preferably has a support face in the form a curved surface 11, which matches the hook 6 of the brake handle when it is its neutral position. More of this will be described in connection with fig. 3. The hand-operated brake is operated in conventional manner by that the handle 3 is pulled upwards and is hereby pivoting with the oblong hole 5 around the pivot 4 , whereby the hook 6 , in the opposite end of the handle, is moved to the right in fig. 2. The wire 8 is hereby hauled while the tubular cover 14 remains steady against the stop means 9 which remains fixed in relation to the support 2 by means of the shoulder part 10. Fig. 3 discloses the device in its parking brake position. In this position the brake handle 3 has been pushed downwards and thus been swinged in opposite direction in relation to what is shown in fig. 2 around the pivot 4. Due to the oblong hole 5 the handle 3 has also been moved downwards in the support 2 and the hook 6 has been displaced into a recess 12 and bears with its tip 13 on the left side of the shoulder part 10. The handle 3 is hereby detachably locked in the position in fig. 3 by means of a snap in operation. Simultaneously with the turning of the handle 3 to the position shown in fig. 3, the left side of the hook 6 pushes the stop means 9 in the direction out from the support 2, to the left, to a new end position. The tubular cover 14 of the wire is hereby also pushed out of the support 2 and a relative dis- placement is carried out between the wire 8 and the tubular cover 14 because the wire end 7 will be catched by the curved surface 11 of the shoulder part 10. The position of the end of the wire is hereby the same as in the neutral position according to fig. 1. When later the parking brake shall be re- leased, the handle 3 is pulled upwards, whereby the interference of the tip 13 of the hook 6 with the shoulder part 10 is detached and the hook 6 will again catch the end 7 of the wire in the manner shown in fig. 1 and due to the tension of the wire the stop means 9 will be pushed into the support 2 to the position shown in fig. 1, that is to say the stop means 9 will bear on the left side of the shoulder part 10. A preferred embodiment of the invention has been described above. Within the spirit of the invention there are some variations. Thus, the stop means 9 can be designed otherwise. The inner end position can be in the form of a shoulder of the stop means 9, which co-operates with the support 2 on its out- side. The movement of the stop means 9 out of the support 2 can be performed indirectly by the hook 6. The snap-in operation can be carried out by that no displacement of the handle takes place in the pivot 4, 5 but that the handle by some other part is locked to the support 2 by a different snap-in means .

Claims: CLAIMS 1. A hand-operated brake consisting of a handle (3), which is pivoting to and from a neutral position in a pivot (4, 5) of a support (2) , which handle (3) has a point of attachment (6) at a distance from the pivot (4, 5) for catching one end of a wire (8) , which is surrounded by a tubular cover (14) , and the other end of which actuates a brake device, characterized in that the end of the tubular cover (14) , which is directed to- wards the point of attachment (6) , bears on a stop means (9) , which is movable within the support (2) , between two end positions, of which one is determined by a first shoulder part (10) , which is fixed in relation to the support (2) and hereby determines the position of the end of the tubular cover (14) in relation to the support (2) when swinging the handle (3) in order to pull the wire (8) into the support (2) for braking, and the second one, intended for carrying out the parking brake function, is determined by a second shoulder part (6) , which forms a part of the handle (3) and locates the second end position a certain distance from the first end position in the direction out of the support (2) , when the handle (3) is pivoted from the neutral position in opposite direction in relation to the direction when pulling the wire (8) , whereby the end (7) of the wire (8) simultaneously is fixed against being pulled into the tubular cover (14) , in a position which corresponds to the position when the handle is in neutral position by a stop (11) , which is fixed in relation to the support (2) and that hereby the handle (3) is detachably locked by means of a snap-in means (13) . 2. Hand-operated brake according to claim 1, characterized in that the pivot (4, 5), besides permitting the handle to pivot in the support, also permits a displacement of the handle (3) in direction towards the point of attachment (6) and that the support (2) has a stop means (13) , in which a part of the handle (6) engages by the displacement and hereby prevents the handle to be swinged in the direction for pulling the wire into the support . 3. Hand-operated brake according to claim 1, characterized in that the point of attachment (6) is a first hook (6) and that the stop means (11) for the wire is a second hook, which is fixed in relation to the support (2) and actuates in the same direction as the first hook (6) . 4. Hand-operated brake according to preceding claims, characterized in that the part of the handle (3) , which co-operates with the support (2) is triangular and in one corner has an oblong hole (5) , which forms the pivot together with a pin (4) in the support (2) and that the first hook (6) is formed in the opposite corner of the handle and whereby the second opposite corner has an extension which forms the grip of the handle. 5. Hand-operated brake according to preceding claims, characterized in that the second hook (11) forming the stop for the wire (8) has a face which is opposite to the opening of the hook, which face forms the first end position for the stop means (9) .

Inventors: LILJEDAHL GUNNAR, LILJEDAHL, GUNNAR
Applicants: LIKO RESEARCH AND DEV AB, LILJEDAHL GUNNAR, LIKO RESEARCH AND DEVELOPMENT AB, LILJEDAHL, GUNNAR
Application year: 1999
Main classification: B60T7
IPC codes: B60T7, B62L3, G05G1