US 12,442,226 B2
Door latch device
Yasuyuki Watanabe, Yokohama (JP); and Shintaro Okawa, Yokohama (JP)
Assigned to MITSUI KINZOKU ACT CORPORATION, Yokohama (JP)
Appl. No. 17/772,431
Filed by MITSUI KINZOKU ACT CORPORATION, Yokohama (JP)
PCT Filed Nov. 25, 2020, PCT No. PCT/JP2020/043856
§ 371(c)(1), (2) Date Apr. 27, 2022,
PCT Pub. No. WO2021/131469, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 2019-236972 (JP), filed on Dec. 26, 2019.
Prior Publication US 2022/0372800 A1, Nov. 24, 2022
Int. Cl. E05B 81/66 (2014.01); E05B 81/14 (2014.01)
CPC E05B 81/66 (2013.01) [E05B 81/14 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A door latch device in which a door lock ECU is communicably connected to a vehicle body ECU provided on a main body side of a vehicle, the door latch device comprising:
a latch mechanism which is provided on a door of the vehicle and holds the door in a closed state by latching a striker provided on the main body side of the vehicle;
a motor;
an electric release mechanism configured to release the latch mechanism by power of the motor;
a manual release mechanism configured to release the latch mechanism by manual operation force;
a lock mechanism which switches between a locked state which disables an operation of the manual release mechanism and an unlocked state which enables the operation of the manual release mechanism;
a courtesy switch configured such that the latch mechanism is switched between a half latch position and a full latch position; and
the door lock ECU which is configured to control the motor and which receives a signal from the courtesy switch,
wherein a first accommodation space and a second accommodation space are formed inside the door latch device,
wherein the first accommodation space is divided into a first area and a second area, in which the latch mechanism, the electric release mechanism, the manual release mechanism, the lock mechanism, and the courtesy switch are placed at a side of the first area, and in which the motor and the door lock ECU are placed at a side of the second area,
wherein the second accommodation space is formed in an area corresponding to a back side of the second area,
wherein the door lock ECU comprises a printed wiring board accommodated in the second accommodation space,
wherein each terminal of the courtesy switch is connected to the printed wiring board via a bus bar disposed between the first accommodation space and the second accommodation space, and a lighting device provided on at least one of a vehicle body and the door is connected to the printed wiring board, and
wherein the courtesy switch is connected to the lighting device via the printed wiring board.