JPH0542555B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a locking device that locks an opening/closing lid for a vehicle, such as a trunk, when the lid is closed and unlocks when the lid is opened.

(Technical background) It is necessary for an opening/closing lid of a vehicle trunk or the like to maintain a closed state when the lid is closed, and to release the closed state when opening the lid. Such a function is generally achieved by a striker provided on one side of the opening/closing lid or the vehicle body, and a locking device provided on the other side. As shown in FIG. 4, the locking device includes a rotary latch b for engaging and disengaging the striker a, and a latch c for engaging and disengaging the rotary latch b.
When the opening/closing lid is closed, as shown in FIG. 5, when the striker a moving in the direction of the solid line arrow engages the rotating latch b, the rotating latch b is moved to a predetermined position while resisting the biasing force of a spring (not shown) in the direction of the broken line arrow. At the same time, the latch c is rotationally displaced in the direction of the solid line arrow by the urging force of the spring d in the direction of the broken line arrow, and engages with a predetermined portion of the rotary latch b. In this state, when the rotational return is inhibited and the latch c is rotationally displaced in the direction opposite to the biasing force of the spring d to separate from the rotational latch b, the rotational latch b
is rotated back by the biasing force of a spring (not shown), and the striker a is thereby rotated to the rotating latch b.
(state shown in FIG. 4). When opening the opening/closing lid, the latch c, which is engaged with the rotary latch b as described above, is rotated in the direction opposite to the biasing direction of the spring d to separate it from the rotary latch b. The rotational displacement is performed by an operating lever located at the driver's seat or by turning on a start switch of an actuator such as a rotor.

(Prior Art and Problems) In the above locking device, conventionally, the side end surface e of the latch c is in contact with the circumferential surface f of the rotary latch b when the opening/closing lid body is in the open state as shown in FIG. When the opening/closing lid shown in FIG. 5 is in the closed state, the upper end surface g is in contact with the cutout surface h of the rotary latch b.

However, in such a conventional structure, when the latch c engaged with the rotary latch b is rotationally displaced in the direction opposite to the biasing force of the spring d, the rotary latch b Since the upper end surface g, which is in contact with the notch surface h, is brought into sliding contact with the notch surface h, frictional resistance is large, and this requires a high operating force. Therefore, when the rotational displacement of the ratchet c is automatically carried out using an actuator such as a motor, an actuator having a torque that overcomes the above-mentioned frictional resistance is required, which causes the lock device to become larger.

(Objective of the Invention) The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to suppress the frictional resistance when rotating and displacing the latch that is engaged with the rotating latch in the direction opposite to the biasing direction of the spring. To provide a locking device for an opening/closing lid for a vehicle which enables rotational displacement with a small operating force.

(Structure of the Invention) In order to achieve the above object, the present invention includes a rotating latch that engages and disengages a striker provided on the opening/closing lid body or the vehicle body, and a ratchet that engages and disengages the rotating latch. When the striker engages with the rotary latch when the body is closed, the rotary latch is rotated to a predetermined position while resisting the biasing force. In this state, when the latch is rotated in the direction opposite to the biasing force and separated from the rotary latch, the rotary latch is rotated back by the biasing force, and then Therefore, the striker is a locking device for a vehicle opening/closing lid that is detachable from a rotary latch, and is in contact with the side end surface of the latch when the opening/closing lid is opened, and is in contact with the side end surface of the ratchet when the opening/closing lid is closed. The rotary latch is provided with a rotary member that rolls and displaces from the side end surface of the latch to approximately the center of the arcuate tip surface as the rotary latch rotates.

(Embodiment of the Invention) An embodiment of the invention will be described below with reference to FIGS. 1 and 2.

In the figure, 1 is a rotary latch that is rotationally displaced around a shaft 2 and is applied with a biasing force in the direction of the dashed arrow by a spring (not shown), and 3 is a shaft 4.
This is a ratchet that is rotationally displaced around , and is applied with a biasing force in the direction of the dashed arrow by a spring (not shown).

A roller (rotating member) 5 as shown in FIG. 3 is provided on the latch side surface 1a of the rotary latch 1 eccentrically to the shaft 2. As shown in FIG. The roller 5 is connected to a shaft 6 fixedly perpendicular to the wall 1b of the rotary latch 1.
It is attached to the bearing 7 via a bearing 7. Such a roller 5 has the rotary latch 1 in the state shown in FIG.
That is, when the opening/closing lid is in the open state, it touches the side end surface 3a of the latch 3, and when the rotating latch 1 is in the state shown in FIG. As the ratchet 3 is rotationally displaced in the direction of the solid arrow, it is rolled and displaced from the side end surface 3a of the ratchet 3, which is rotationally displaced in the direction of the solid arrow, to approximately the center of the arcuate tip surface 3b. The rotary latch 1 is prevented from rotating back because the roller 5 is in contact with the center portion of the distal end surface 3b of the ratchet 3 which is in the rotation return state. In other words, the locked state (locked) is maintained.

When the above locked state is released (unlocked) by rotationally displacing the latch 3 in the opposite biasing direction, the rotary latch 1 rotates back in the biasing direction as the ratchet 3 rotates; The roller 5, which is in contact with the tip end surface 3b of the roller 3, moves from the tip end surface 3b to the side end surface 3a while rolling. The urging forces of both the latch 3 and the rotating latch 1 act between the distal end surface 3b of the latch 3 and the roller 5, but the state of engagement between the latch 3 and the rotating latch 1 is determined by the rolling of the roller 5. Since the latch is released, the frictional resistance is small, and therefore, rotational displacement of the ratchet 3 can be achieved with a small operating force.

(Effects of the Invention) In summary, the locking device for an opening/closing lid for a vehicle according to the present invention includes a rotary latch for engaging and disengaging a striker provided on the opening/closing lid or the vehicle body, and a latch for engaging and disengaging the rotary latch. When the striker engages with the rotary latch when the opening/closing lid is closed, the rotary latch is rotated to a predetermined position while resisting the biasing force, and accordingly, the latch is rotated by the biasing force. The rotary latch is displaced and engaged with a predetermined portion of the rotary latch to prevent the rotary latch from returning to rotation, and in this state, when the latch is rotationally displaced in the anti-biasing direction and disengaged from the rotary latch, the rotary latch is biased by the biasing force. A locking device for a vehicle opening/closing lid is of a type in which the striker returns to rotation and thereby separates from the rotating latch, and is in contact with a side end surface of the latch when the opening/closing lid is opened; The rotary latch is provided with a rotary member that rolls and displaces from the side end surface of the latch to approximately the center of the arcuate tip surface as the rotary latch rotates when the opening/closing lid is closed. The load applied to the ratchet at the time of unlocking by rotationally displacing the ratchet in the counter-biasing direction by the rotary member is suppressed to an extremely low level. Therefore, the rotary displacement of the ratchet can be performed with a small operating force, and the rotational displacement can be prevented. In the case where an actuator such as a motor is used, an actuator with a small torque is required, which has the advantage that the locking device can be constructed relatively compactly.

[Brief explanation of drawings]

1 and 2 are schematic diagrams showing one embodiment of the present invention, FIG. 3 is an enlarged sectional view of the same roller, and FIGS. 4 and 5 are schematic diagrams of a conventional locking device, respectively. be. 1...Rotating latch, 3...Latch, 3a...
Side end surface, 3b... tip surface, 5... roller (rotating member), 8... striker.

Claims (1)

[Claims] 1. A rotary latch that engages and disengages a striker provided on the opening/closing lid body or the vehicle body, and a ratchet that engages and disengages the rotary latch, and the striker engages with the rotating latch when the opening/closing lid body is closed. Then, the rotary latch is rotationally displaced to a predetermined position while resisting the biasing force, and the latch is rotationally displaced by the biasing force and engages with a predetermined portion of the rotary latch, thereby preventing the rotary latch from rotating back. In addition, in this state, when the latch is rotationally displaced in the opposite biasing direction and removed from the rotating latch, the rotating latch returns to rotation due to the urging force, thereby causing the striker to separate from the rotating latch. A locking device for the opening/closing lid, which is in contact with the side end surface of the ratchet when the opening/closing lid is opened, and when the rotary latch rotates and displaces when the opening/closing lid is closed, the locking device contacts the side end surface of the ratchet when the opening/closing lid is closed. A locking device for an opening/closing lid for a vehicle, characterized in that the rotating latch is provided with a rotating member that rolls and displaces from the end surface to approximately the center of the arcuate tip surface.