Parking hand brake for a motor vehicle and manufacturing process of brake lever

Hand brake for a motor vehicle, designed so as to be connected to a brake cable (15), comprising a ratchet plate (1, 2) intended to be fixed to the floor of the vehicle, a pawl (4) designed so as to interact with the ratchet plate, and a handgrip lever (6;

• 26) equipped with a push-button (18) associated with the pawl, characterised in that it comprises a cassette casing (5 mechanically integral with the grip lever, containing the ratchet plate (1, 2) and the pawl (4), and this cassette casing is articulated about a transverse pivot pin (13) traversing the ratchet plate and is adapted so as to receive the end of the cable (15);
• the cassette casing (5) is formed from two end pieces (5a) rigidly interconnected by the abovementioned transverse pivot pin (13), between which are arranged the ratchet plate (1) and the pawl (4) and which are provided with means (8, 11, 12) for fastening to the lever (6;
• 26);
• the cassette casing (5) is housed in an end part (6b;
• 28) of the lever (6;
• 26), integrally connected to the cassette casing, which is provided with internal ribs (8;
• 8a) over which hook complementary retaining flanks (9) of the cassette casing, the said means for fastening the cassette casing to the lever also comprising, at least one rivet (12);
• the grip lever (6;
• 26), contains a semi-rigid push rod (17;
• 29) capable of sliding inside the lever (6;
• 26) and whose head (19;
• 32) can push the pawl (4) in order to release it from the ratchet plate (2) and to enable the lever and the cassette casing (5) to pivot about their common axis of rotation (13);
• the lever (26) is angled and the push rod (29) is curved so as to match the angle of the lever;
• the grip lever (6;
• 26) is made from moulded plastic and has two hollow zones (6a, 6b;
• 27, 28) respectively in the handgrip zone and in the zone for fastening to the cassette casing (5), these hollow zones being obtained by means of two movable cores of the mould having opposite and non-parallel axes of displacement (N1, N2);
• and
• a return spring (7) housed in the cassette casing (5) and a first end (7a) of which interacts with the pawl (4) in order to return it into its position bearing on the ratchet plate (1, 2), and the second end (7b) interacts with the push rod (17, 29) in order to return it into its initial rest position, which corresponds to the bearing position of the pawl on the ratchet plate.