JPS62164976A - Lock apparatus of opening/closing lid for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a locking device for locking an opening/closing lid 1 for a vehicle, such as a trunk, when it is closed and unlocking it when it 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 that engages and disengages the striker a, and a ratchet C that engages and disengages the rotary latch b. When the striker a moving in the direction of the solid line arrow engages with the rotating latch b, the rotating latch b rotates in the direction of the solid line arrow to a predetermined position while resisting the urging force of a spring (not shown) in the direction of the broken line arrow. Accordingly, the ratchet C is rotationally displaced in the direction of the solid arrow by the urging force of the spring d in the direction of the dashed arrow, and engages with a predetermined portion of the rotational latch b to prevent the rotational return of the rotational latch b. is rotated in the direction opposite to the biasing direction of spring d, and the rotating latch b
When the 5-turn latch b is released from the 5-turn latch b, it returns to rotation due to the biasing force of a spring (not shown).

As a result, the striker a is configured to separate from the rotating latch b (the state shown in FIG. 4).

When opening the opening/closing lid, the ratchet C, which is engaged with the rotary latch b as described above, is rotationally displaced in the direction opposite to the biasing direction of the spring d to disengage 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 motor.

(Prior Art and Problems) In the above locking device, conventionally, the ratchet C has a side end surface e 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 of the rotary latch b.

However, in such a conventional structure, when the ratchet C engaged with the rotary latch b is rotationally displaced in the direction opposite to the urging force of the spring d, the rotary latch b is The frictional resistance is large because the upper end surface g, which is in contact with the notch surface, is in sliding contact with the notch surface.
This requires high operating power. Therefore, when the rotational displacement of the ratchet C is automatically performed using an actuator such as a motor, an actuator having a torque that overcomes the above-mentioned frictional resistance is required, which causes the locking device to be large-sized.

(Object 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 frictional resistance when rotating and displacing a ratchet engaged with a rotating latch in the direction opposite to the biasing direction of the spring. An object of the present invention is to provide a locking device for a vehicle opening/closing lid body 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 side, 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 rotationally displaced to a predetermined position while resisting the biasing force, and accordingly, the ratchet is rotationally displaced by the biasing force and engages with a predetermined portion of the rotary latch. When the ratchet is engaged and prevented from returning to rotation, and in this state, the ratchet is rotationally displaced in the opposite biasing direction to separate from the rotation latch, the one-turn latch is rotated back by the biasing force, thereby causing the rotation of the rotation latch to return to its original position.・The lie force is a locking device for a vehicle opening/closing lid that separates from a rotating latch, and is in contact with the side end surface of the ratchet 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 ratchet 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); 3 is a rotary latch that is rotationally displaced around a shaft 4 and is biased in the direction of the dashed arrow by a spring (not shown). It is a ratchet that is given a biasing force of.

A roller (rotating member) 5 as shown in FIG. 3 is provided on the ratchet side surface 1a of the rotary latch 1 eccentrically to the shaft 2. As shown in FIG. The roller 5 is attached via a bearing 7 to a shaft 6 that is fixed perpendicularly to the wall 1b of the rotary latch 1. In such a roller 5, the one-turn latch 1 is the first
In the state shown in the figure, that is, when the opening/closing lid body is in the open state, it is in contact with the side end surface 3a of the ratchet 3, and the rotary latch 1 is in the second
In the state shown in the figure, that is, when the opening/closing lid is in the closed state, an arc-shaped arc is formed from the side end surface 3a of the ratchet 3, which is rotationally displaced in the direction of the solid line arrow as the striker 8 rotates the rotary latch 1 in the direction of the solid line arrow. It is rolled and displaced to approximately the center of the 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 in the rotation return state. That is,
Maintain the locked state (locked).

When releasing (unlocking) the lock-shaped m & ratchet 3 by rotationally displacing it in the anti-biasing direction, the rotary latch 1 rotates back in the biasing direction with the rotational displacement of the ratchet 3. The roller 5, which is in contact with the tip end surface 3b, moves from the tip end surface 3b to the side end surface 3a while rolling. The urging forces of both the ratchet 1-3 and the rotary latch 1 act between the distal end surface 3b of the ratchet 3 and the roller 5, but the engagement state between the ratchet 3 and the rotary latch 1 is determined by the rolling of the roller 5. Since the frictional resistance is released by , 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 a vehicle opening/closing lid according to the present invention includes a rotary latch that engages/disengages a striker provided on the opening/closing lid or the vehicle body, and a ratchet that engages/disengages the rotary latch. When the sliding latch engages with the rotary latch when the opening/closing lid body is closed, the rotary latch rotates to a predetermined position while resisting the biasing force, and the ratchet is accordingly biased by the force. When the ratchet is rotationally displaced and engaged with a predetermined portion of the rotary latch to prevent the rotary latch from rotating back, and in this state, the ratchet is rotationally displaced in the anti-biasing direction to separate from the rotary latch, the rotary latch will release the biasing force. This is a locking device for a vehicle opening/closing lid body of the 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 ratchet when the opening/closing lid body is opened. The rotary latch is provided with a rotary member that rolls and displaces from the side end surface of the ratchet to approximately the center of the arc-shaped tip surface when the rotary latch rotates when the lid is closed. The load applied to the ratchet when unlocking by rotationally displacing the ratchet in the anti-biasing direction is suppressed by the member, and therefore rotational displacement of the ratchet can be performed with a small operating force, and one rotational displacement can be applied to an actuator such as a motor. In this case, an actuator with a small torque is required, and the locking device has the advantage of being relatively compact.

[Brief explanation of drawings]

1 and 2 are schematic configuration diagrams showing an embodiment of the present invention, FIG. 3 is an enlarged cross-sectional view taken on the same day, and FIGS. 4 and 5 are schematic configuration diagrams of a conventional locking device, respectively. It is. 1... Rotating latch, 3... Ratchet, 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. When the rotary latch is engaged, the rotary latch is rotationally displaced to a predetermined position while resisting the biasing force, and accordingly, the ratchet is rotationally displaced by the biasing force and engages with a predetermined portion of the rotary latch, thereby inhibiting the rotational return of the rotary latch. In this state, when the ratchet is rotationally displaced in the anti-biasing direction to separate from the rotating latch, the rotating latch returns to rotation due to the biasing force, thereby causing the striker to separate from the rotating latch. The locking device is in contact with a side end surface of the ratchet when the opening/closing lid body is opened, and when the rotary latch is rotationally displaced when the opening/closing lid body is closed, an arcuate shape is formed from the side end surface of the ratchet. 1. A locking device for an opening/closing lid for a vehicle, characterized in that the rotating latch is provided with a rotating member that is displaceable by rolling to approximately the center of the front end surface of the latch.