JP4530912B2 - Door latch device - Google Patents

Description

The present invention regulates the opening movement of the door relative to the vehicle body when the latch engages with the striker entering the engagement groove of the latch, while the vehicle body when the latch is released and the engagement groove is opened. It is related with the door latch apparatus comprised so that the opening movement of the door might be permitted.

A vehicle such as a four-wheeled vehicle is provided with a door latch device between the vehicle main body and the door, and door opening / closing control with respect to the vehicle main body is performed. In this type of door latch device, for example, when the latch engages with the striker entering the latch engagement groove, the opening movement of the door with respect to the vehicle body is restricted, while the latch is released to release the engagement groove. In such a case, a door is configured to allow the opening movement of the door relative to the vehicle body (see, for example, Patent Document 1).

JP 2001-182407 A

  By the way, in recent vehicles, various kinds of facilitation of operation are achieved, and the facilitation of door opening / closing operation is also demanded. For this reason, conventionally, there has also been provided a vehicle in which the latching operation and the opening movement of the door are each performed by driving an actuator. In other words, the door latch device is provided with a latch actuator that shifts the striker and the latch to the full latch state when the striker and the latch are in the half latch state by the door closing operation, and the latch is released by the door opening operation. In this case, an open actuator that moves the door to the fully open position is provided between the vehicle body and the door, thereby facilitating the opening and closing operation of the door.

  Here, even when the latch of the door latch device is released, the striker may still be disposed in the engagement groove of the latch. Under such circumstances, for example, even if the door is lightly touched, the half-latch state is immediately established. For this reason, there is a possibility that the open actuator that attempts to open and move the door and the latch actuator that attempts to shift the latch to the full latch state are simultaneously driven in opposite directions.

  An object of this invention is to provide the door latch apparatus which can perform door opening / closing control correctly in view of the said situation.

In order to achieve the above object , the door latch device according to the present invention regulates the opening movement of the door with respect to the vehicle body when the latch engages with the striker entering the engagement groove of the latch, while the latch is released. A door latch device configured to allow opening movement of the door relative to the vehicle body when the engagement groove is opened by operation, and includes a striker detection means for outputting a detection signal when the striker deviates from the engagement groove of the latch. It is characterized by that.

Further , the door latch device according to the present invention has a striker receiving groove in the device main body for guiding the approach of the striker to the meshing groove of the opened latch in the above-mentioned invention , and the striker detecting means is a striker receiving unit. When the striker is disposed in the latch engagement groove, the striker is disposed at the retracted position, and the striker deviates from the latch engagement groove. And a switch member that performs a switching operation when the lever member disposed at the advanced position moves toward the retracted position.

  According to the present invention, since the actual position of the striker can be detected by the striker detection means, the door opening / closing control can be accurately performed.

  Hereinafter, preferred embodiments of a door latch device according to the present invention will be described in detail with reference to the accompanying drawings.

  1 to 3 show a door latch device according to an embodiment of the present invention. As shown in FIG. 4, the door latch device exemplified here applies to a door (hereinafter referred to as “trunk lid D”) for opening and closing an opening of a trunk room TR provided in the vehicle body B, and the trunk lid D is applied to the door latch device. It is for holding in a closed state. In the present embodiment, a sedan type four-wheeled vehicle in which the striker S is fixedly disposed on the vehicle body B and the door latch device 1 is provided on the trunk lid D is illustrated. Although not shown in the figure, a power trunk unit that automatically opens and closes the trunk lid D by driving the open actuator OA is provided between the trunk lid D and the vehicle body B. Further, a weather strip formed of an elastic material is provided between the periphery of the trunk lid D and the vehicle body B.

  As shown in FIGS. 1 to 3, the door latch device 1 is configured by providing a base plate (device main body) 10 with a latch mechanism portion 100, an actuator drive mechanism portion 200, and a manual operation portion 300.

  The base plate 10 serves as a reference when the door latch device 1 is attached to the trunk lid D. The base plate 10 has a striker receiving groove 11 at a portion corresponding to the striker S of the vehicle body B, specifically, at the lower end of the base plate 10. Yes. The striker accommodation groove 11 is a groove-shaped notch extending upward from the lower end of the base plate 10, and guides and accommodates the striker S when the trunk lid D is closed with respect to the vehicle body B. It is formed in a possible position and size.

  The latch mechanism 100 is for holding the striker S in mesh when the trunk lid D is closed with respect to the vehicle body B, and the ratchet shaft 101 and the latch are located on the left and right sides of the striker receiving groove 11. A shaft 102 is provided. The ratchet shaft 101 is for pivotally supporting the ratchet 110 with respect to the base plate 10, and is provided in the vicinity of the opening end of the striker housing groove 11. The latch shaft 102 is provided to rotatably dispose the latch 120 with respect to the base plate 10, and is provided in the vicinity of the rear end portion of the striker housing groove 11.

  The ratchet 110 of the latch mechanism unit 100 extends from the ratchet shaft 101 toward the inner side end of the striker receiving groove 11, and includes a latch locking part 111 and a ratchet operation part 112.

  The latch locking portion 111 is a convex portion projecting from the side surface of the ratchet 110 toward the striker housing groove 11 in the vicinity of the rear end portion of the striker housing groove 11.

  The ratchet operation portion 112 is a portion further extending beyond the inner end of the striker housing groove 11, and has a bent edge portion 113 and a switch operation portion 114. The bent edge portion 113 is a portion bent at a substantially right angle in a direction away from the base plate 10, and is provided on the outer edge portion of the ratchet operation portion 112. The switch operation unit 114 is a portion protruding from the inner edge of the ratchet operation unit 112 along the surface of the base plate 10.

  The latch 120 of the latch mechanism unit 100 includes an engagement groove 121, a hook portion 122, a first engagement portion 123, a second engagement portion 124, and a latch operation portion 125.

  The engagement groove 121 is a notch formed from the outer peripheral surface of the latch 120 toward the direction close to the latch shaft 102, and has a width that can accommodate the striker S. The engagement groove 121 is configured to sequentially cross from the opening end of the striker housing groove 11 toward the back end when the latch 120 is rotated counterclockwise around the latch shaft 102 in FIG. It is.

  The hook portion 122 is a portion located on the opening end side of the striker housing groove 11 when the meshing groove 121 intersects the striker housing groove 11.

  The first engagement portion 123 and the second engagement portion 124 are configured to restrict the clockwise rotation of the latch 120 in FIG. 1 when abutting against the latch locking portion 111 of the ratchet 110, respectively. The first engaging portion 123 is configured such that the hook portion 122 of the latch 120 is positioned at the opening end portion of the striker receiving groove 11 when the first engaging portion 123 comes into contact with the latch locking portion 111. The second engagement portion 124 is configured such that the hook portion 122 of the latch 120 is positioned at the back end portion of the striker housing groove 11 when contacting the latch locking portion 111. Even when the latch locking portion 111 is in contact with either the first engaging portion 123 or the second engaging portion 124, the hook portion 122 passes through the striker housing groove 11 with respect to the striker housing groove 11. It protrudes to a position where it can be prevented.

  The latch operation portion 125 is a portion extending from a portion close to the latch shaft 102 in a manner corresponding to the ratchet operation portion 112 of the ratchet 110. The latch operation portion 125 is provided with a return spring 103 that urges both in the direction of approaching each other with the ratchet operation portion 112.

  Although not explicitly shown in the drawing, a latch cover is provided at a position covering the ratchet 110 and the latch 120 on the surface of the base plate 10. The latch cover is also provided with a striker receiving groove that can receive the striker S when the trunk lid D is closed with respect to the vehicle body B.

  The latch mechanism 100 is provided with an open / close switch lever (lever member) 130, a door open / close switch (switch means) 140, a latch switch 150, and a ratchet switch 160.

  The open / close switch lever 130 extends radially outward from the extended end of the ratchet shaft 101 protruding to the surface side of the latch cover, and swings about the ratchet shaft 101 independently of the ratchet 110. Thus, it is possible to continuously displace between the advance position and the retracted position. As shown in FIG. 5, the opening / closing switch lever 130 arranged at the advanced position is defined by contacting the stopper 10 a protruding from the base plate 10, and the position of the striker receiving groove 11 formed in the base plate 10 is determined. It will be in the state extended in the substantially right angle direction in the aspect which obstruct | occludes an opening edge part. As shown in FIG. 7, the open / close switch lever 130 disposed in the retracted position extends in an inclined manner so that its tip end covers the back end of the striker receiving groove 11, and the opening end of the striker receiving groove 11 is formed. It will be in an open state.

  Although not explicitly shown in the drawing, the open / close switch lever 130 is provided with a switch lever spring between the base plate 10. The switch lever spring constantly biases the open / close switch lever 130 toward the stopper 10a.

  The door opening / closing switch 140 is for detecting that the opening / closing switch lever 130 is disposed at the advanced position, and is disposed on the surface of the latch cover opposite to the opening / closing switch lever 130 with the striker receiving groove 11 interposed therebetween. It is.

  The latch switch 150 is a rotary switch that detects the rotational position of the latch 120 with respect to the base plate 10, and is provided on the surface of the latch cover so that the rotational axis coincides with the axis of the latch shaft 102.

  The ratchet switch 160 outputs a detection signal when the latch locking portion 111 comes into contact with the first engagement portion 123 or the second engagement portion 124 of the latch 120. The ratchet switch 160 is operated by the switch operation portion 114 of the ratchet 110. It is provided at the position to be operated.

  On the other hand, the actuator driving mechanism 200 of the door latch device 1 is for operating the ratchet 110 and the latch 120 by driving the latch actuator 201 and includes an output lever 210 as a first lever and a cam driving gear 220. .

  The output lever 210 is provided with a lever shaft 211 at the base end, and can be swung around the axis of the lever shaft 211 by accommodating the lever shaft 211 in the slide groove 12 of the base plate 10, and the slide groove 12. It is possible to slide the lever shaft 211 along The slide groove 12 is formed at the upper edge of the base plate 10 and is formed in an arc shape that protrudes outward from the base plate 10.

  A lever spring 212 and a cancel lever 230 are provided between the base end portion of the output lever 210 and the base plate 10. The lever spring 212 is interposed between the base end portion of the output lever 210 and the base plate 10 and urges the lever shaft 211 of the output lever 210 to be always disposed at the right end portion of the slide groove 12.

  The cancel lever 230 is swingably disposed on the base plate 10 via a cancel shaft 231 provided in the vicinity of the right end portion of the slide groove 12. The cancel lever 230 is integrally formed with a bending portion 230 a and a pressing operation portion 230 b. is there. The curved portion 230a is a portion extending in a curved shape from the cancel shaft 231 along the slide groove 12 of the base plate 10, and has a support protrusion 233 at a portion corresponding to the right end of the slide groove 12 on the curved inner surface. is doing. When the lever shaft 211 of the output lever 210 is located at the right end of the slide groove 12, the support protrusion 233 abuts on the left peripheral surface thereof, and restricts the sliding movement of the lever shaft 211 to the left. is there. The pressing operation portion 230b extends downward from the cancel shaft 231 and has a pressure receiving portion 230c on the outer edge of the extending end portion. The pressure receiving portion 230c is a portion bent in such a manner that it extends in a direction perpendicular to the surface of the base plate 10 from the extending end portion of the pressing operation portion 230b. The cancel lever 230 is provided with a cancel spring 232 between the tip of the bending portion 230 a and the base plate 10. The cancel spring 232 biases the curved inner surface of the cancel lever 230 so as to press the peripheral surface of the lever shaft 211. The cancel spring 232 has a spring constant sufficiently larger than the lever spring 212 described above.

  In addition, the output lever 210 is provided with a release lever portion 213 and a latch pin 214 at a tip portion located between the ratchet operation portion 112 and the latch operation portion 125.

  The release lever portion 213 is a lever-like portion provided in a manner facing the bent edge portion 113 of the ratchet operation portion 112 from the tip portion of the output lever 210, and the output lever 210 swings around the axis of the lever shaft 211. In this case, the ratchet 110 can be pressed through the bent edge portion 113 and the ratchet operation portion 112.

  The latch pin 214 is a columnar portion protruding from the tip of the output lever 210, and when the output lever 210 swings around the axis of the lever shaft 211, the latch 120 is pressed through the latch operation portion 125. Is possible.

  The cam drive gear 220 is rotatably disposed at a portion of the base plate 10 corresponding to the intermediate portion of the output lever 210. When the latch actuator 201 is driven, the cam drive gear 220 is rotated in one direction via the gear train 240. Then, it rotates clockwise in FIG.

  The cam drive gear 220 is provided with a cam pin 221 on an end surface facing the output lever 210. The cam pin 221 protrudes from the end surface of the cam drive gear 220 and is linked to a cam groove 215 formed in the intermediate portion of the output lever 210. The cam groove 215 oscillates the output lever 210 as appropriate via the cam pin 221 when the cam driving gear 220 rotates clockwise, and will be described later in the ratchet 110 and the latch 120 via the release lever portion 213 and the latch pin 214. A series of operations are sequentially performed.

  Although not shown in the figure, in the present embodiment, an electric motor having a worm gear on the output shaft is applied as the latch actuator 201, while a worm wheel meshing with the worm gear is provided as the gear train 240. Applying things. A reference numeral 250 in FIG. 2 denotes a cam pin position detection switch for detecting a change in the position of the cam pin 221 accompanying the rotation of the cam drive gear 220.

  The manual operation unit 300 of the door latch device 1 includes a base plate 10 and an open lever 310 that is a second lever. The open lever 310 is rotatably disposed at a position on the right side of the cam drive gear 220 in FIG. 1 via an open lever shaft 311, and includes an initial position defining portion 312, a latch release operation portion 313, lever operation A unit 314 and a cancel operation unit 315.

  The initial position defining portion 312 is for abutting the defining surface 10b of the base plate 10 when the open lever 310 rotates clockwise in FIG. 1, and for defining the open lever 310 at the initial position. In a state where the open lever 310 is defined at the initial position, it can be rotated only counterclockwise in FIG. The latch release operation portion 313 extends downward from the open lever shaft 311 when the open lever 310 is defined at the initial position, and the extended end portion thereof faces the bent edge 113 of the ratchet 110. Part. The lever operating portion 314 is a portion that extends further outward from the initial position defining portion 312. One end of a wire cable W is connected to the lever operation unit 314. Although not shown in the drawing, the other end of the wire cable W is connected to the key cylinder KC of the trunk lid D, and can be pulled upward in FIG. 1 by key operation. The cancel operation unit 315 extends upward from the open lever shaft 311 when the open lever 310 is defined at the initial position, and the extended end of the cancel operation unit 315 faces the pressure receiving unit 230c of the cancel lever 230. It is.

  Although not shown in the drawing, an initial position defining spring is provided between the open lever 310 and the base plate 10. The initial position defining spring urges the initial position defining portion 312 of the open lever 310 in a direction in which the initial position defining portion 312 is always pressed against the defining surface 10 b of the base plate 10.

  When the open lever 310 configured as described above is rotated counterclockwise in FIG. 1, the latch release operation portion 313 and the bent edge portion 113 of the ratchet 110 come into contact with each other, and the ratchet 110 is swung clockwise. On the other hand, the cancel operation portion 315 and the pressure receiving portion 230c of the cancel lever 230 are in contact with each other, and the cancel lever 230 can be swung clockwise. In the present embodiment, when the open lever 310 is rotated, the ratchet 110 is first swung, and then the cancel lever 230 is swung so that the distance between the cancel operation unit 315 and the pressure receiving unit 230c of the cancel lever 230. Is set larger than the distance between the latch release operation portion 313 and the bent edge portion 113 of the ratchet 110. More specifically, the latch locking portion 111 of the ratchet 110 is connected to the first engagement portion 123 or the second engagement portion 124 of the latch 120 via the latch release operation portion 313 by the counterclockwise rotation of the open lever 310. When the open lever 310 is further rotated counterclockwise after swinging clockwise until it is not opposed, the support protrusion 233 of the cancel lever 230 is moved through the lever shaft of the output lever 210 when the open lever 310 is further rotated counterclockwise. It is set to swing until it is separated from 211.

  FIG. 8 is a block diagram showing a control system of the door latch device 1 described above. The opening / closing control unit 400 shown in FIG. 8 includes the latch actuator 201 and the power trunk unit based on the output results of the door opening / closing switch 140, the latch switch 150, the ratchet switch 160, and the cam pin position detection switch 250, The trunk lid D is opened and closed by appropriately driving the open actuator OA. Although not explicitly shown in the figure, the trunk open switch is an ON operation when the trunk lid D is opened. For example, the trunk open switch is provided in the vicinity of the trunk lid D or in the trunk lid D in the vehicle main body B.

  9 to 15 are conceptual diagrams sequentially showing the operation of the door latch device 1. Hereinafter, the opening / closing operation of the trunk lid D by the opening / closing control unit 400 will be described with reference to these drawings.

  The door latch device 1 is in the open-side neutral state shown in FIG. 9 when the trunk lid D is in the opened state. That is, the latch 120 is in the most clockwise position, and is in a state before the first engagement portion 123 of the latch 120 and the latch locking portion 111 of the ratchet 110 face each other. The engagement groove 121 provided in the latch 120 is disposed in a state in which an opening end portion thereof is open to an opening end portion of the striker receiving groove 11 provided in the base plate 10 and is inclined with respect to the striker receiving groove 11. In the output lever 210, the lever shaft 211 is disposed at the right end portion of the slide groove 12, and the release lever portion 213 and the latch pin 214 provided at the tip portion are separated from the ratchet operation portion 112 and the latch operation portion 125, respectively. Is arranged. The open / close switch lever 130 is disposed at the advanced position, and is in a state of extending in a substantially right angle direction so as to close the opening end of the striker receiving groove 11.

When closing manipulation of the trunk lid D from the open side neutral state shown in FIG. 9, that the striker S provided on the vehicle body B enters the striker receiving groove 11 of the base plate 10, and further enters the engagement groove 121 of the latch 120 Become. In this case, since the opening / closing switch lever 130 swings clockwise in FIG. 9 as the striker S enters the striker receiving groove 11, this can be detected by the door opening / closing switch 140.

When the striker S sequentially enters the rear end along the striker receiving groove 11 by the closing operation of the trunk lid D, the latch 120 in which the engagement groove 121 is inclined with respect to the striker receiving groove 11 is pushed to the striker S. Then, it rotates counterclockwise around the axis of the latch shaft 102 (meshing operation). During this time, the side surface of the ratchet 110 is in pressure contact with the peripheral surface of the latch 120 by the elastic force of the return spring 103, and the latch locking portion 111 is in contact with the first engagement portion 123 of the latch 120 before long. Retained.

  When the latch engaging portion 111 of the ratchet 110 is in contact with the first engaging portion 123 of the latch 120, the latch of the latch 120 is resisted against the elastic restoring force of the return spring 103 as shown in FIG. The clockwise rotation around the shaft 102 is restricted, and the hook portion 122 of the latch 120 engages with the striker S, thereby preventing the striker S from deviating from the engagement groove 121 of the latch 120. As a result, the door latch device 1 and the striker S are not in a state in which the trunk lid D is completely closed with respect to the vehicle main body B, but are in a half latch state in which movement in the opening direction is restricted.

When the door control device 400 determines that the door latch device 1 is in the half latch state shown in FIG. 10, that is, after detecting the entry of the striker S into the striker housing groove 11 by the door opening / closing switch 140, the opening / closing control unit 400 detects it by the ratchet switch 160. When it is determined that the door latch device 1 is in the half-latch state based on the counterclockwise swing of the ratchet 110 and the rotational position of the latch 120 detected by the latch switch 150, the latch actuator 201 is driven to drive the cam The drive gear 220 is rotated clockwise, and the output lever 210 is sequentially swung clockwise around the axis of the lever shaft 211 disposed at the right end of the slide groove 12 by the action of the cam pin 221 and the cam groove 215. Start the action to be moved. As a result, the latch pin 214 of the output lever 210 presses the latch operation part 125 of the latch 120, whereby the latch 120 starts to rotate counterclockwise about the latch shaft 102. In this case, although the latch locking portion 111 of the ratchet 110 is in contact with the first engagement portion 123 of the latch 120, the ratchet 110 appropriately swings according to the outer peripheral shape of the latch 120, so that the latch locking portion 111 is The counterclockwise rotation of the latch 120 is not hindered.

When the latch 120 rotates counterclockwise from the half latch state shown in FIG. 10, the latch locking portion 111 is held in contact with the second engagement portion 124 of the latch 120 in due course. When the latch engaging portion 111 of the ratchet 110 is in contact with the second engaging portion 124 of the latch 120, the latch of the latch 120 is resisted against the elastic restoring force of the return spring 103 as shown in FIG. The clockwise rotation around the shaft 102 is restricted, and the hook portion 122 of the latch 120 engages with the striker S, thereby preventing the striker S from deviating from the engagement groove 121 of the latch 120. In addition, during the period from the half-latch state shown in FIG. 10 to the state shown in FIG. 11, the latch 120 operates so as to draw the striker S into the inner end of the striker receiving groove 11. As a result, the door latch device 1 and the striker S are in a fully latched state in which the trunk lid D is completely closed with respect to the vehicle body B and the movement in the opening direction is restricted against the elastic force of the weather strip. As the striker S enters , the open / close switch lever 130 sequentially swings toward the retracted position, and does not hinder the transition from the half latch state to the full latch state.

  When the door control device 400 determines that the door latch device 1 has shifted to the fully latched state shown in FIG. 11, that is, the counterclockwise swing of the ratchet 110 detected by the ratchet switch 160 and the latch 120 detected by the latch switch 150. If it is determined that the door latch device 1 is in the fully latched state based on the rotation position, the latch actuator 201 is continuously driven to swing the output lever 210 in the same direction, and the latch side overstroke state shown in FIG. 12 is entered. . As a result, the latch locking portion 111 of the ratchet 110 can be reliably brought into contact with the second engagement portion 124 of the latch 120.

  After the transition to the latch-side overstroke state shown in FIG. 12, the opening / closing control unit 400 continuously drives the latch actuator 201 to swing the output lever 210 counterclockwise. Thereafter, the drive of the latch actuator 201 is stopped when the door latch device 1 enters the closed neutral state shown in FIG. 13 according to the detection result of the cam pin position detection switch 250. In the closed-side neutral state shown in FIG. 13, the latch engaging portion 111 of the ratchet 110 abuts against the first engaging portion 123 of the latch 120 engaged with the striker S, and the lever shaft 211 of the output lever 210 is in the slide groove. 12, the release lever portion 213 and the latch pin 214 are spaced apart from the ratchet operation portion 112 and the latch operation portion 125, respectively. As a result, the trunk lid D is kept closed with respect to the vehicle body B.

During these operations, according to the door latch device 1 described above, after detecting the entry of the striker S into the striker receiving groove 11 by the door opening / closing switch 140, the ratchet 110 detected by the ratchet switch 160 is rotated counterclockwise. The latch actuator 201 is driven only when it is determined that the door latch device 1 is in the half latch state based on the rotational position of the latch 120 detected by the latch switch 150. For example, the ratchet switch 160 has the ratchet 110. The latch 120 does not rotate clockwise about the axis of the latch shaft 102 even if the swing of the shaft is erroneously detected. Therefore, when the trunk lid D is closed, the striker S always enters the meshing groove 121 of the latch 120, so that the vehicle body B can be reliably closed.

  On the other hand, when the driver turns on the trunk open switch in the closed-side neutral state shown in FIG. 13, the opening / closing control unit 400 that detects this operation drives the latch actuator 201 of the door latch device 1 to drive the cam drive gear. 220 is rotated clockwise, and the operation of the cam pin 221 and the cam groove 215 starts the operation of sequentially swinging the output lever 210 counterclockwise around the axis of the lever shaft 211.

  When the output lever 210 swings counterclockwise about the axis of the lever shaft 211 arranged at the right end of the slide groove 12, the release lever portion 213 of the output lever 210 presses the ratchet operation portion 112 of the ratchet 110. As a result, the ratchet 110 swings clockwise around the ratchet shaft 101 against the elastic force of the return spring 103, and as shown in FIG. The contact state with the portion 111 is released. As a result, the latch 120 is rotated clockwise around the latch shaft 102 by the elastic restoring force of the return spring 103, so that the engagement groove 121 of the latch 120 is opened, and the striker S is engaged with the engagement groove 121 of the latch 120 and The base plate 10 is allowed to deviate from the striker receiving groove 11.

  When the door latch device 1 shifts to the state shown in FIG. 14, the opening / closing controller 400 continuously drives the latch actuator 201 to swing the output lever 210 in the same direction, and shifts to the open side overstroke state shown in FIG. To do. Thereby, the contact state between the second engagement portion 124 of the latch 120 and the latch locking portion 111 of the ratchet 110 can be reliably released.

  After shifting to the open side overstroke state shown in FIG. 15, the opening / closing control unit 400 continuously drives the latch actuator 201 to swing the output lever 210 clockwise. Thereafter, when the door latch device 1 is in the open-side neutral state shown in FIG. 9 according to the detection result of the cam pin position detection switch 250, the driving of the latch actuator 201 is stopped.

  On the other hand, in the state shown in FIG. 14, the opening / closing control unit 400 actually causes the striker S to deviate from the engagement groove 121 of the latch 120 and the striker receiving groove 11 of the base plate 10 due to the elastic restoring force of the return spring 103 and the weather strip. When the switch 140 detects that the open / close switch lever 130 has returned to the advanced position, the driving of the open actuator OA included in the power trunk unit is started. As a result, the trunk lid D can be fully opened with respect to the vehicle body B.

  Here, in the present embodiment, as a condition for driving the open actuator OA of the power trunk unit, the open / close switch lever 130 is disposed at the advanced position, and this is detected through the door open / close switch 140. That is, after the engagement groove 121 of the latch 120 is opened, the striker S actually deviates completely from the engagement groove 121 and further deviates from the striker receiving groove 11 of the base plate 10. The OA is driven. Thus, for example, when the striker S does not deviate from the meshing groove 121 even though the trunk open switch is turned on to open the meshing groove 121 of the latch 120, the open actuator OA of the power trunk unit is driven. Never do. Therefore, as described above, even when a load is applied to the trunk lid D from the state where the striker S is positioned in the engagement groove 121 of the opened latch 120, the latch 120 is engaged and the half latch state is achieved. Thus, it is possible to reliably prevent a situation in which the open actuator OA and the latch actuator 201 operate in different directions to cause a malfunction.

  Thereafter, the above-described operations shown in FIGS. 9 to 15 are repeatedly performed, and the opening / closing of the trunk lid D with respect to the vehicle main body B can be controlled.

  By the way, in the door latch device 1 described above, for example, when a foreign object is sandwiched between the vehicle body B and the trunk lid D, the latch 120 cannot be shifted from the half-latch state to the full-latch state. It is difficult to swing the output lever 210 clockwise around the axis of the lever shaft 211 arranged at the right end of the lever.

  However, in the door latch device 1 according to the present embodiment, when the cam drive gear 220 rotates clockwise after the latch 120 becomes immobile, the intermediate portion of the output lever 210 is pressed to the left in the drawing. Eventually, the lever shaft 211 of the output lever 210 climbs over the support protrusion 233 against the elastic force of the cancel spring 232 and the elastic force of the lever spring 212, and as shown in FIGS. And the slide groove 12 of the base plate 10 is slid toward the left end. As a result, even when the latch 120 is stationary, all of the power transmission system that transmits the power from the latch actuator 201 to the latch 120, that is, the gear train 240, the cam drive gear 220, and the output lever 210 operate. Therefore, no overload is applied to them, and there is no possibility of causing damage.

  As shown in FIGS. 18 and 19, the lever shaft 211 slidably moved in the slide groove 12 is rotated again by the cooperation of the cam pin 221 and the cam groove 215 when the cam drive gear 220 rotates. It is held in a state returned to the right end. Therefore, if the trunk open switch is turned on from this state, as shown in FIGS. 14 and 15, the contact state between the second engagement portion 124 of the latch 120 and the latch locking portion 111 is released, and the trunk lid D Therefore, the foreign matter sandwiched between the vehicle body B and the trunk lid D can be removed.

  FIG. 20 shows an operation when the trunk lid D is opened by manual operation from the closed-side neutral state shown in FIG. That is, when the key is inserted into the key cylinder KC of the trunk lid D from the closed-side neutral state shown in FIG. The open lever 310 transmitted to the open lever 310 via 314 and defined at the initial position rotates counterclockwise in FIG. As a result, as shown in FIG. 20, the latch release operation portion 313 of the open lever 310 comes into contact with the bent edge portion 113 of the ratchet 110, and the ratchet 110 swings clockwise, and the second engagement of the latch 120. The contact state between the joining portion 124 and the latch locking portion 111 is released. As a result, the latch 120 rotates clockwise around the latch shaft 102 by the elastic restoring force of the return spring 103, so that the engagement groove 121 of the latch 120 is opened, and the engagement groove 121 of the latch 120 and the base plate 10 are The striker S is ready to deviate from the striker receiving groove 11.

  Thereafter, the striker S actually deviates from the engagement groove 121 of the latch 120 due to the elastic restoring force of the return spring 103 and the weather strip, and further, the striker S deviates from the striker receiving groove 11 of the base plate 10. When it is detected that the lever 130 has returned to the advanced position, the opening / closing control unit 400 drives the open actuator OA of the power trunk unit. As a result, the trunk lid D can be fully opened with respect to the vehicle body B.

  As described above, in the door latch device 1, when the open lever 310 is rotated, the ratchet 110 is first swung, and then the cancel lever 230 is swung so that the pressure received by the cancel operation unit 315 and the cancel lever 230 is received. The interval with the portion 230 c is set larger than the interval between the latch release operation portion 313 and the bent edge portion 113 of the ratchet 110. Therefore, as clearly shown in FIG. 20, until the latch locking portion 111 of the ratchet 110 does not face the first engagement portion 123 or the second engagement portion 124 of the latch 120 via the latch release operation portion 313. Even in the state of swinging clockwise, the cancel lever 230 does not swing depending on the cancel operation portion 315, and the lever shaft 211 of the output lever 210 is brought into contact with the right end portion of the slide groove 12 by the contact of the support protrusion 233. Maintained.

  As a result, when the trunk lid D is opened by the key cylinder KC, the elastic force of the initial position defining spring required when the open lever 310 is rotated, and the return spring required when the ratchet 110 is swung. An operation force that resists the elastic force 103 may be applied.

  FIG. 21 shows the operation when the key cylinder KC is further rotated clockwise from the state shown in FIG. That is, when the key cylinder KC is further rotated clockwise from the state shown in FIG. 20, the rotation of the key cylinder KC is transmitted to the open lever 310 via the wire cable W and the lever operation unit 314, and the open lever 310 is canceled. The cancel lever 230 swings around the axis of the cancel shaft 231 via the operation unit 315. When the cancel lever 230 swings, the support protrusion 233 of the cancel lever 230 is separated from the lever shaft 211 of the output lever 210, and the slide movement of the lever shaft 211 along the slide groove 12 becomes possible. As a result, in the state shown in FIG. 21, the output lever 210 is released from the power transmission systems 210, 220, and 240 that transmit the power from the latch actuator 201 to the latch 120, and the cam driving gear 220 is rotated. In this case, the latch 120 cannot be rotated by the latch pin 214 of the output lever 210. Conversely, in the state shown in FIG. 21, the output lever 210 can be rotated counterclockwise in the drawing around the cam pin 221 of the cam drive gear 220.

  Therefore, for example, when the latch actuator 201 becomes immobile during the transition from the half latch state shown in FIG. 10 to the full latch state shown in FIGS. 11 and 12, the key cylinder KC is rotated by the key operation as described above. When operated, the output lever 210 can be rotated counterclockwise around the cam pin 221 of the cam drive gear 220, and the engagement state of the latch 120 can be released to open the trunk lid D. It becomes like this. In addition, since the key cylinder KC is for opening the trunk lid D, there is no possibility that the presence of the key cylinder KC will be unclear, and the problem in the case where the latch actuator 201 is in a stationary state is surely solved. Is possible. Further, in order to swing the cancel lever 230, it is necessary to resist the elastic force of the cancel spring 232, and an operation force larger than usual is required. There is an effect that can be.

  As described above, according to the door latch device 1, as a condition for driving the open actuator OA of the power trunk unit, the striker S actually deviates completely from the engagement groove 121 of the latch 120, and the open / close switch lever 130 advances. For example, the door opening / closing switch 140 detects this, so that the striker S is moved from the engagement groove 121 even though the engagement groove 121 of the latch 120 is opened by turning on the trunk open switch. In the state where it does not deviate, the open actuator OA of the power trunk unit is not driven. Therefore, even when a load is applied to the trunk lid D from the state in which the striker S is positioned in the meshing groove 121 of the opened latch 120 and the latch 120 is meshed to enter the half latch state, the latch and the open actuator OA are latched. It is possible to reliably prevent a situation in which the actuator 201 operates in different directions and causes a problem.

  In the above-described embodiment, the door latch device 1 provided between the vehicle main body and the trunk lid is illustrated, but the present invention can be similarly applied to a door latch device that holds other doors in a closed state. Is possible.

  In the above-described embodiment, the full latch state is also released by driving the latch actuator, but it is not always necessary to release the full latch state by the actuator.

  Furthermore, in the above-described embodiment, the striker is provided on the vehicle body, while the door latch device is provided on the door. However, it may be provided in the opposite manner.

  Furthermore, in the above-described embodiment, after the striker has deviated from the engagement groove of the latch, it is further detected that the striker has deviated from the striker receiving groove of the apparatus body. However, the striker detection means may be configured to detect when the striker deviates from the engagement groove of the latch.

It is the front view which showed the door latch apparatus which is embodiment of this invention. It is a rear view of the door latch apparatus shown in FIG. It is the III-III sectional view taken on the line in FIG. FIG. 2 is a perspective view of a vehicle to which the door latch device shown in FIG. 1 is applied. It is a conceptual diagram which shows the principal part of the door latch apparatus shown in FIG. It is a conceptual diagram which shows the principal part of the door latch apparatus shown in FIG. It is a conceptual diagram which shows the principal part of the door latch apparatus shown in FIG. It is a block diagram which shows the control system of the door latch apparatus shown in FIG. It is a conceptual diagram which shows operation | movement of the door latch apparatus shown in FIG. It is a conceptual diagram which shows operation | movement of the door latch apparatus shown in FIG. It is a conceptual diagram which shows operation | movement of the door latch apparatus shown in FIG. It is a conceptual diagram which shows operation | movement of the door latch apparatus shown in FIG. It is a conceptual diagram which shows operation | movement of the door latch apparatus shown in FIG. It is a conceptual diagram which shows operation | movement of the door latch apparatus shown in FIG. It is a conceptual diagram which shows operation | movement of the door latch apparatus shown in FIG. It is a conceptual diagram which shows operation | movement of the door latch apparatus shown in FIG. It is a conceptual diagram which shows operation | movement of the door latch apparatus shown in FIG. It is a conceptual diagram which shows operation | movement of the door latch apparatus shown in FIG. It is a conceptual diagram which shows operation | movement of the door latch apparatus shown in FIG. It is a conceptual diagram which shows operation | movement of the door latch apparatus shown in FIG. It is a conceptual diagram which shows operation | movement of the door latch apparatus shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door latch apparatus 10 Base plate 11 Striker accommodation groove 100 Latch mechanism part 120 Latch 121 Engagement groove 122 Hook part 123 1st engaging part 124 2nd engaging part 125 Latch operation part 130 Opening / closing switch lever 140 Door opening / closing switch B Vehicle body D Trunk Lid S striker

Claims (2)

When the latch (120) engages with the striker (S) entering the engagement groove (121) of the latch ( 120 ) , the opening movement of the door (D) relative to the vehicle body (B) is restricted, while the latch ( In the door latch device (1) configured to allow the opening movement of the door (D) relative to the vehicle body (B) when the engagement groove (121) is opened by the release operation of 120) ,
When the striker (S) enters the engagement groove (121) of the latch (120), a lever member (130) that continuously displaces while contacting the striker (S);
Switch means (140) for outputting a detection signal in contact with the lever member when the striker (S) deviates from the engagement groove (121) of the latch (120) and separates from the lever member (130) ;
A door latch device comprising: The apparatus body (10) has a striker receiving groove (11) for guiding the entry of the striker (S) to the meshing groove (121) of the opened latch (120) ,
The lever member (130)
Movably it disposed on the opening end of the striker receiving groove (11), the open end of the latch (120) striker receiving groove (11) when the striker (S) are arranged in meshing groove (121) of while being disposed in the retracted position to open the striker receiving groove when the striker (S) is deviated from the engagement groove (121), further the striker from the striker receiving groove (11) (S) deviates latch (120) (11) is arranged at the advanced position for closing the open end ,
The switch means (140)
According to claim 1, wherein the advanced position to the deployed lever member (130), wherein a call to switching operation when started continuously displaced towards the retracted position by entry of the striker (S) Door latch device.

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