JP3731351B2 - Trunk lid automatic closing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a trunk lid automatic closing device.
[0002]
[Prior art]
In general, a trunk lid of an automobile is locked by engaging a striker with a latch mechanism installed in a trunk room opening of a vehicle body. By the way, since the weather strip is attached to the opening of the trunk room, when closing the trunk lid, the trunk lid must be pushed down so as to overcome the reaction force and the striker must be engaged with the latch mechanism. Don't be. At that time, the vehicle body greatly bounces and gives the passenger an unpleasant feeling.
[0003]
In view of this, an apparatus has been proposed in which when the trunk lid is temporarily locked slightly before the fully closed position, the trunk lid is automatically pulled to the fully closed position to be completely locked. This device includes a latch mechanism provided in the trunk lid, and a trunk lid lock mechanism provided in a trunk room opening of the vehicle body for reciprocating the striker up and down between a standby position and a closed position. When the trunk lid is closed and the latch mechanism is engaged with the striker, the striker descends from the standby position to the closing position to hold the trunk lid in the fully closed state. This type of apparatus is disclosed in, for example, Utility Model Registration No. 2552900.
[0004]
[Problems to be solved by the invention]
The latch mechanism of this device is provided with switch means for detecting the engagement state with the striker. When the trunk lid is opened, this switch means outputs an engagement release signal, and the striker is raised to the standby position. In preparation for the next closure of the trunk lid. By the way, when the weatherstrip sticks to the trunk lid due to freezing or the like, the trunk lid will remain in the weatherstrip even if the latch mechanism is disengaged from the striker by operating the trunk lid opener switch in the passenger compartment. Although it rises by the amount of bending recovery, it will not completely open. In the case of the conventional apparatus, even in such a case, the switch means issues a disengagement signal, and the striker is raised to the standby position, so that the striker is reengaged with the latch mechanism. As a result, it was mistaken that the trunk lid was closed, and the striker was lowered to the closing position to fully close the trunk lid, so that the trunk lid could not be opened.
[0005]
In view of such circumstances, an object of the present invention is to provide a trunk lid automatic closing device in which a striker does not engage with a latch mechanism even when the trunk lid cannot be automatically opened and closed.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a latch mechanism provided in a trunk lid and a trunk lid lock provided in a trunk room opening of a vehicle body for reciprocating a striker up and down between a standby position and a closed position. When the mechanism, the switch means for detecting the engagement state of the latch mechanism with respect to the striker, the trunk lid is closed and the latch mechanism is engaged with the striker, the striker is lowered from the standby position to the closed position. Control means for controlling the trunk lid lock mechanism based on the output signal of the switch means so that the striker rises to a standby position when the trunk lid is opened while the trunk lid is held in a fully closed state. In the trunk lid automatic closing device comprising: Detecting means for exiting provided, detection means when outputting the opening signals of the trunk lid, characterized in that said control means has to raise the striker in the standby position.
[0007]
The detection means may be a switch that operates in conjunction with the vertical movement of the latch mechanism.
The trunk lid lock mechanism is provided with a trunk lid open / close detection portion that is pushed down by abutting against the tip of the base plate of the latch mechanism when the trunk lid is closed, and the switch is operated in conjunction with the detection portion. A spring that biases the trunk lid open / close detection portion and opposes the depression by the latch mechanism may be provided.
[0008]
The trunk lid lock mechanism has a striker pivotally supported at one end by a base and formed at a substantially intermediate portion of a lever having a cam groove for driving up and down at the other end. is a trunk lid close detection lever, substantially in the middle portion of the trunk lid opening and closing detection lever is pivotally supported on the opposite side between the striker against pivoted position of the lever with the striker, the trunk One end on the striker side of the lid open / close detection lever is disposed so as to be able to contact the latch mechanism, and the other end is operable in conjunction with the vertical movement of the latch mechanism by enabling the switch to operate. Rotating to move the striker up and down by engaging the cam groove of the lever with the striker below the trunk lid open / close detection lever Drum for the dynamic may be arranged.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0010]
FIG. 7 shows an automobile equipped with the trunk lid automatic closing device of the present invention. This automobile includes a latch mechanism 2 provided in the trunk lid 1 and a trunk lid lock mechanism 3 provided in the trunk room opening TR of the vehicle body. When the trunk lid opener switch 5 of the door armrest 4 is operated, the latch mechanism The trunk lid 1 is automatically opened by unlocking the trunk lid lock mechanism 3.
[0011]
As shown in FIG. 3, the latch mechanism 2 includes a base plate 6 and a lock lever 7 and a latch 8 that are pivotally connected by pins 9 and 10, respectively. The lock lever 7 is urged clockwise by the spring SP, and the upper end thereof is in contact with the stopper 11. The latch 8 is urged counterclockwise by the spring SP and engages the engaging portion 8 a with the engaging portion 7 a of the lock lever 7. This state is a so-called latch-on state in which the striker 12 of the trunk lid lock mechanism 3 to be described later is engaged with the concave portion 8b of the latch 8, but when the lock lever 7 is slightly rotated counterclockwise, the engagement is stopped. The engagement portion 8a of the lock lever 7 is disengaged from the portion 7a, and the latch 8 also rotates counterclockwise, so that the engagement with the striker 12 is released as shown in FIG.
[0012]
Now, when the striker 12 pushes up the latch 8 through the groove 6a of the base plate 6, the latch 8 rotates clockwise and returns to the latch-on state shown in FIG. By the way, the lock lever 7 is driven by a motor (not shown) and rotates within the range shown in FIGS. 3 and 4. At that time, the lock switch 13 is turned on and off to latch on. The latch-off state is detected. A resin cover 50 is attached to the tip of the base plate 6.
[0013]
FIG. 5 shows the trunk lid lock mechanism 3. In this mechanism 3, one end of a lever 15 is pivotally connected to an upper end portion of a base 14 by a pin 16. This is the other end of the lever 1 5 Yes formed cam grooves 17, are pins 18a of the drum 18 is engaged in the cam groove 17. The drum 18 is connected and driven to a motor 19 disposed below the lever 15 of the base 14 via a speed reduction mechanism (not shown) so as to rotate about a half circumference around the shaft 18b. Further, a substantially intermediate portion between the pivotal support portion of the lever 15 by the pin 16 and the formation portion of the cam groove 17 is folded back to the front in the figure, and a hole 21 is formed at the tip of the folded portion 20 to form the striker 12 described above. Is configured. When the striker 12 reaches bottom dead center, the rotation of the lever 15 is restricted by the stopper ST. The lever 15 is disposed obliquely so as to be positioned downward when the cam groove 17 side is desired from the pin 16.
[0014]
As shown in the figure, when the pin 18a of the drum 18 is engaged with the cam groove 17 of the lever 15 above the shaft 18b, the striker 12 has reached the standby position at the top dead center. When the drum 18 is rotated approximately halfway in the clockwise direction, the pin 18a rotates the lever 15 in the clockwise direction while moving in the cam groove 17, and the striker 12 is in the closed position that is the bottom dead center as shown in FIG. Will descend. By the way, the drum 18 has a radius that is approximately half the circumference larger than that of the other parts, and the stop switch 22 is disposed close to the peripheral surface of the drum 18 so that the stop switch 22 is in the standby position. However, when the drum 18 starts to rotate so that the striker 12 descends, the large-diameter portion 18c of the drum 18 pushes the stop switch 22 to turn it off. It is like that. When the striker 12 reaches the closing position, the stop switch 22 is separated from the large-diameter portion 18c of the drum 18 and returns to the ON state, so that the rotation of the drum 18 is stopped.
[0015]
On the other hand, more specifically, the trunk lid opening / closing detection lever as the trunk lit opening / closing detection portion is provided on the opposite side of the upper end portion of the base 14 with the striker 12 of the pin 16 serving as a pivotal support portion of the lever 15 therebetween. 23 is provided. The lever 23 is formed in a substantially square shape, and a bent portion thereof is pivotally coupled to the base 14 by a pin 24. Further, the trunk lid open / close detection lever 23 is urged clockwise by the torsion coil spring 25, and normally the switch contact portion 23a is pressed against the movable piece 26a of the trunk lid switch 26 to turn on the switch 26. It is in a state. At this time, the switch contact portion 23a and the latch contact portion 23b located on the opposite side across the pin 24 face the latch insertion hole OP of the trunk lid opening TR in a horizontal state (see FIG. 5). When the trunk lid 1 is closed, the base plate 6 of the latch mechanism 2 comes into contact with the latch contact portion 23a and the trunk lid opening / closing detection lever 23 is pushed down. The trunk lid opening / closing detection lever 23 is started to be pushed down at the same time or just before hitting 12. The drum 18 is disposed below the lever 23 and the switch 26.
[0016]
The base 14 is provided with a controller 27 as control means. The controller 27 receives signals from the trunk lid opener switch 5, the lock switch 13, the stop switch 22 and the trunk lid switch 26, and The operation of the trunk lid lock mechanism 3 is controlled as follows.
[0017]
When the trunk lid 1 is opened, the latch mechanism 2 is in a latch-off state as shown in FIG. 4, while the trunk lid lock mechanism 3 raises the striker 12 to the standby position as shown in FIG. Yes. Now, when the trunk lid 1 is closed, as shown in FIG. 1, the latch 8 of the latch mechanism 2 is relatively pushed up by the striker 12 of the trunk lid lock mechanism 3 to bring the latch mechanism 2 into a latch-on state. Then, the lock switch 13 changes from the ON state to the OFF state, and the controller 27 receives the signal to start driving the motor 19 of the trunk lid lock mechanism 3, and the drum 18 rotates clockwise to lower the striker 12. . Then, the striker 12 reaches the closing position as shown in FIG. 2 and the trunk lid 1 is fully closed. At that stage, the rotation of the drum 18 is stopped. When the trunk lid 1 is closed, the trunk lid opening / closing detection lever 23 is pushed down by the tip of the base plate 6 of the latch mechanism 2, so that the switch contact portion 23a is separated from the movable piece 26a of the trunk lid switch 26, The switch 26 is in an OFF state.
[0018]
On the other hand, when the trunk lid 1 is opened, the trunk lid opener switch 5 of the door armrest 4 shown in FIG. 7 may be operated to bring the latch mechanism 2 into the latch-off state. Then, the restraint of the striker 12 by the latch mechanism 2 is released, and the trunk lid 1 is urged by a torsion bar (not shown) to automatically open. At that time, the trunk lid open / close detection lever 23 is urged by the torsion coil spring 25 and rotates clockwise, and the switch contact portion 23a pushes the movable piece 26a of the trunk lid switch 26 to turn the switch 23 to the ON state. To do. Then, the controller 27 receives the signal, rotates the drum 18 counterclockwise, and raises the striker 12 to the standby position.
[0019]
Incidentally, when the weather strip 30 is stuck to the trunk lid 1 due to freezing or the like, even if the trunk lid opener switch 5 is operated and the latch mechanism 2 is latched off, the trunk lid 1 is Although it rises by the amount of bending recovery, it will not completely open. However, in the present embodiment, as described above, when the trunk lid switch 26 is in the ON state, the striker 12 is raised to the standby position. In such a case, the striker 12 is not raised to the standby position. Not done. That is, since the latch mechanism 2 is in the latch-off state, the trunk lid 1 can be forcibly opened.
[0020]
On the other hand, in the conventional apparatus, when the lock switch 13 changes from the OFF state to the ON state, the striker 12 is raised to the standby position. In such a case, the striker 12 is raised to the standby position. The latch mechanism 2 was re-engaged, and then lowered to the closed position to bring the trunk lid 1 into a fully closed state. For this reason, the forced opening of the trunk lid 1 could not be performed. That is, in the present embodiment, the actual opening / closing state of the trunk lid 1 is detected instead of the engagement state of the latch mechanism 2, and the striker 12 is raised to the standby position, so that the latch mechanism 2 is brought into the latch-on state. The trunk lid 1 can be forcibly opened.
[0021]
FIG. 6 is a flowchart showing the operation when the trunk lid 1 is opened. In the figure, when the OFF state of the stop switch 22 continues for 6 seconds or longer, the striker 12 is stopped from rising, but this takes into account the case where the lever 15 cannot rotate due to a foreign object biting it. This is because.
[0022]
In the apparatus of the present embodiment, the trunk lid switch 26 is changed from the OFF state to the ON state when the latch contact portion 23b of the trunk lid opening / closing detection lever 23 returns to the horizontal state, that is, the trunk lid 1 Is fully opened and it is determined that the striker 12 will not re-engage with the latch 8 even if the striker 12 is raised to the standby position. Then, there is no fear that it is determined that the trunk lid 1 has been opened, and the opening / closing of the trunk lid 1 can be reliably detected.
[0023]
Furthermore, even if the trunk lid 1 is opened, the trunk lid open / close detection lever 23 is not exposed to the outside from the latch insertion hole OP of the trunk lid opening TR, so that the appearance quality is good.
[0024]
Since the lever 15 is installed obliquely with the drum 18 side lowered with respect to the base 14, the trunk lid open / close detection lever 23 and the switch 26 can be disposed in the space above the drum 18, and the space can be used effectively. Thus, the width of the device itself can be suppressed as much as possible.
[0025]
By the way, in this type of apparatus, since the latch mechanism 2 is engaged with the striker 12 in the standby position to perform temporary locking, it is difficult to absorb the closing energy of the trunk lid 1 by the weather strip 30 or the bound rubber. For this reason, the latch mechanism 2 hits the striker 12 in the past, and a large interference sound is generated. In the present embodiment, as described above, the trunk lid opening / closing detection lever is simultaneously with or just before the latch 8 hits the striker 12. 23 is started, and the torsion coil spring 25 opposes the depression of the trunk lid opening / closing detection lever 23 by the latch mechanism 2, so that the closing energy of the trunk lid 1 is absorbed and the interference sound is reduced. .
[0026]
In this embodiment, the open / close state of the trunk lid 1 is detected by the trunk lid open / close detection lever 23 and the switch 26. For example, instead of the lever, a piston-like vertical slide member or a mechanical switch is used instead of an optical switch. Other means such as a non-contact switch such as a switch or a magnetic switch may be used.
[0027]
【The invention's effect】
According to the present invention, even if the weather strip sticks to the trunk lid 1 due to freezing or the like, the striker rises to the standby position and does not engage with the latch mechanism, that is, the latch mechanism can be kept in the latch-off state. Therefore, forced opening of the trunk lid becomes possible.
[0028]
According to the configuration of the second aspect, the approaching state of the latch mechanism and the striker is accurately detected, and the opening / closing state of the trunk lid is reliably detected.
[0029]
According to the configuration of the third aspect, since the spring opposes the depression of the trunk lid open / close detection lever by the latch mechanism, the closing energy of the trunk lid is absorbed, and the interference sound between the latch mechanism and the striker is reduced.
[Brief description of the drawings]
FIG. 1 is a diagram showing an automatic closing device for a trunk lid according to the present invention.
FIG. 2 is a diagram showing a case where the striker of FIG. 1 is lowered to a closing position.
FIG. 3 is a view showing a latch mechanism of the apparatus.
4 is a diagram showing a latch-off state in FIG. 3;
FIG. 5 is a view showing a trunk lid lock mechanism of the apparatus.
FIG. 6 is a flowchart showing an operation when the trunk lid of the apparatus is opened.
FIG. 7 is a view showing an automobile equipped with the same device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Trunk lid 2 ... Latch mechanism 3 ... Trunk lid lock mechanism 12 ... Striker 23 ... Trunk lid opening / closing detection lever 26 ... Trunk lid switch 27 ... Controller TR ... Trunk lid opening

Claims (4)

A latch mechanism provided in the trunk lid, a trunk lid lock mechanism provided in the trunk room opening of the vehicle body and reciprocating the striker up and down between a standby position and a closed position, and engagement of the latch mechanism with the striker When the trunk lid is closed and the latch mechanism is engaged with the striker, the striker is lowered from the standby position to the closed position to hold the trunk lid in the fully closed state. An automatic closing device for a trunk lid, comprising control means for controlling the trunk lid lock mechanism based on an output signal of a switch means so that the striker rises to a standby position when the trunk lid is opened. And a detecting means for detecting the open / closed state of the trunk lid. When outputting the opening signals of the trunk lid, the automatic closing means of the trunk lid, characterized in that said control means has to raise the striker in the standby position. 2. The trunk lid automatic closing device according to claim 1, wherein the detecting means is a switch that operates in conjunction with the vertical movement of the latch mechanism. The trunk lid lock mechanism is provided with a trunk lid opening / closing detection portion that is pressed down by abutting against the tip of the base plate of the latch mechanism when the trunk lid is closed, and the switch is operated in conjunction with the detection portion. 3. The trunk lid automatic closing device according to claim 2, further comprising a spring that urges the trunk lid opening / closing detection portion to counter the depression by the latch mechanism. The striker of the trunk lid lock mechanism is formed at an intermediate portion of a lever having one end pivotally supported by a base and a cam groove for raising and lowering driving formed at the other end, and the trunk lid open / close detection unit is a trunk lid close detection lever, substantially in the middle portion of the trunk lid opening and closing detection lever is pivotally supported on the opposite side between the striker against pivoted position of the lever with the striker, the trunk One end of the lid opening / closing detection lever on the striker side is disposed so as to be able to contact the latch mechanism, and the other end is operable in conjunction with the vertical movement of the latch mechanism by enabling the switch. Rotating to move the striker up and down by engaging the cam groove of the lever with the striker below the trunk lid open / close detection lever Automatic closure device of the trunk lid according to claim 3, characterized in that the drum for moving is arranged.

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