Shoe-hold apparatus for drum brake device

A shoe-hold apparatus for a drum brake device, comprising:

• (1) a shoe-hold spring including
• a first arm arranged on a drum side surface of a web of a brake shoe, which is mounted on a back plate at an opposite side of the back plate,
• a second arm arranged to face the first arm, and
• a curved connecting portion jointing the first and second arms, the first arm and said second arm have a one end opened first slot and a one end opened second slot at their ends respectively;
• and
• (2) a shoe-hold pin including
• a first head that is non-passable through a pin-insertion hole formed in the back plate,
• a shaft continuing from the first head and passable through the pin-insertion hole, and
• a second head continuing from the shaft and passable through the pin-insertion hole,
• said shoe-hold spring is resiliently retained between the second head and the web by penetrating the second head and shaft through the pin-insertion hole of the back plate to engage the first head with the back plate and sliding the shoe-hold spring on the drum side surface of the web from a crossing direction with an axis of the shoe-hold pin while the second head and a part of the shaft are projecting from the drum side surface of the web to be passed the shoe-hold pin through the pair of slots, wherein
• said shoe-hold spring has a pin-insertion portion continuing from said first slot in said first arm and said shaft of the shoe-hold pin has
• (1) a penetrating portion that is passable through said first and second slots and
• (2) a disengagement preventive portion that is non-passable through said first slot of the first arm and has a cross-sectional configuration allowing to be positioned in said pin insertion portion,
• said disengagement preventive portion has a length that is projected from said drum side surface of the web mounted on the back plate while said shoe-hold pin is engaging with said back plate;
• and
• said length that is projected from said drum side surface of the web is determined so as to restrict a movement of the shoe-hold spring along said web when said disengagement preventive portion of the shoe-hold pin is positioned within the pin-insertion portion of the first arm.