Pressure detection device and manufacturing method of the same

A method for manufacturing a pressure detection device comprising:

• preparing a flexible printed board having first and second end portions and an elastically deformable portion between the first and second end portions;
• providing a sensing part for outputting an electrical signal responsive to an applied pressure at one end portion of a housing, the housing having formed therein an approximately cylindrical hollow part elongated in an axial direction;
• providing a circuit part for processing the signal from the sensing part at an other end portion of the housing;
• disposing the flexible printed board in the housing to be connected to the sensing part and the circuit part at the first and second end portions such that the sensing part and the circuit part are electrically connected via the flexible printed board, the flexible printed board extending entirely in the axial direction and to be elastically deformable in the axial direction;
• and
• fixing the sensing part and the circuit part to the housing, wherein:
• the flexible printed board is disposed in the housing in an extended state of a length between the first and second end portions of the flexible printed board when the flexible printed board is connected to the sensing part and the circuit part before the fixing of the sensing part and the circuit part is completed;
• and
• the flexible printed board is disposed in the housing in the contracted state of the length after the fixing of the sensing part and the circuit part is completed.