JPH0451077Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention uses a runner at the end of the seatbelt to attach the seatbelt when the door is closed, in a vertical seatbelt device that is installed in a vehicle and automatically moves the seatbelt to the released and attached positions in conjunction with the opening and closing of the door. Regarding the belt runner latch device, which is fixed in position and released when the door is opened, if the door is opened inadvertently in the event of a collision or while driving on rough roads, the belt runner is fixed in place to protect the safety of the occupants. This invention relates to a latch device for a belt runner.

[Conventional technology]

2. Description of the Related Art Conventionally, some vehicles such as passenger cars are equipped with passive seat belt devices to protect the safety of passengers while driving. This type of passive seat belt device uses electric power or other means to automatically move the seat belt to the release position or attachment position for the passenger in conjunction with the opening and closing of the door. A runner attached to the end of the seat belt is slidably housed in a slide rail that extends from the pillar to the side roof and center pillar. Then, a drive device such as an electric motor that is linked to the opening and closing of the door operates a drive member such as a wire inserted into the slide rail, and the seat belt is moved by driving a runner via this drive member. It's summery. The vehicle also has a belt runner latching device consisting of a limit switch that detects when the seat belt is in the fastened position when the door is closed, and a latch means that fixes the runner in the seat belt fastened position. The runner is released when the door is closed so that movement of the runner in the direction of releasing the seatbelt is not obstructed. However, this type of belt runner latch device is configured to operate in response to the opening and closing of the door, so if the door is inadvertently opened during a vehicle collision, the runner will be released, and the seat belt will not function as intended. There were cases in which I was unable to perform my functions. Therefore, a means is provided to sense the large inertial force applied to the vehicle body while the vehicle is running, and when this sensing means is activated, the runner release movement of the latch member is restrained, and the runner is fixed in the seatbelt fastening position even if the door is opened. A method has been proposed in which it is kept in place (for example, see Japanese Utility Model Application No. 60-3141).

[Problem that the idea aims to solve]

However, in such a belt runner latch device, the sensing means senses a large inertial force and operates even when the vehicle is traveling on a rough road, and in this case, the following problems arise. To explain the above problem with reference to FIGS. 4 and 5, first, the latch member 1, which is always biased in the anti-engagement direction by a spring (not shown),
When the runner reaches the belt attachment position, the runner 2 is rotated in the engagement direction by a piece attached to the drive member to lock the runner 2. Here, the limit switch 4 becomes open when the runner 2 reaches the seat belt fastening position, and becomes closed when the runner 2 starts moving in the direction of arrow A. On the other hand, the drive device 5 moves the drive member 3 in the direction of arrow A when the limit switch 4 is open by switching the door switch that is linked to the opening and closing of the door.
When the limit switch 4 is in the closed state, the drive member 3 is moved in the direction of arrow B. Further, the sensing means 6 is adapted to sense when a large inertial force of a predetermined value or more is applied to the vehicle body and fix the latching means 1 in the latched state. In such a belt runner latch device, when a large inertial force is applied to the vehicle body during a collision or while driving on a rough road, the sensing means 6 senses this and fixes the latch member 1 in the latched state. If the door is opened inadvertently or if the door is opened in this state, the limit switch is in the open state, so switching the door switch will cause the drive device to 5.
is energized to move the drive member 3 in the direction shown by arrow A. However, since the runner 2 is locked to the latch member 1, the drive member 3 cannot be moved and the limit switch 4 remains open. Once the door is closed, the limit switch 4 remains open and the drive device 5 is no longer energized to move the drive member 3 in the direction of arrow B. As a result, there have been cases where the seat belt has become unusable, such as being unable to release it. Another conventional method is to cut off the drive power and stop the belt from moving electrically when a large inertial force is applied to the vehicle body, but in this conventional method, there is a method to electrically stop the belt from moving when a large inertial force is applied to the vehicle body. In order to create a time lag between the opening and closing of the door and the movement of the belt,
Requires delay circuit. However, in this conventional example, even if the door is opened and closed during normal use, the seat belt does not move during the delay time of the delay circuit, which poses a problem in that getting on and off the vehicle is difficult. Therefore, the present invention has been developed so that during normal use, there is no problem with getting on and off due to opening and closing of the door, and when the belt is attached, the runner is securely locked even if the door is opened inadvertently in the event of a collision or while driving on a rough road. To provide a belt runner latch device that can secure the safety of a passenger and prevent the seat belt from becoming unusable, such as being unable to release it.

[Means to solve the problem]

To achieve this objective, the present invention is a passive seat belt device that is driven by a drive wire via a drive wire by a drive device that operates in response to the opening and closing of a door, and moves in the direction of releasing or attaching the seat belt along a slide rail. A latching device for a belt runner that locks a runner in a seat belt fastening position by means of a latch means, which includes an acceleration detecting means for detecting excessive acceleration acting on the vehicle body, and an acceleration detecting means for detecting excessive acceleration acting on the vehicle body; In a belt runner latching device comprising locking state holding means for holding the means in a runner locked state, said latching means engages a first piece fixed to a drive wire of the runner in the seat belt fastening position. The structure includes a rotating actuator, and a latch member that is coaxially supported with respect to the actuator and rotates following the rotation of the actuator by engagement with an elongated hole and a pin, and the locking state holding means is When excessive acceleration is applied, the second piece fixed to the drive wire can be engaged with the seat belt fastening position in conjunction with the operation of the acceleration detection means, and the second piece moves as the door opens. and an engaging pawl that rotates when pressed by the pressing body and engages with the latch member to maintain the runner locking state. The driving device is configured in a circuit to be in a door open standby state in which it engages with the actuator when the door is closed and drives the runner in the seat belt release direction, and when the door is opened, the drive device is disengaged from the actuator and drives the runner in the seat belt fastening direction. The means for this invention is to provide a limit switch which constitutes a circuit of the driving device when the door to be driven is in a standby state.

[Effect]

With such means, the acceleration detecting means and the locking state holding means do not operate unless excessive acceleration is applied to the vehicle body. Therefore, when the door is closed and the runner reaches the seat belt fastening position, the actuator engages with the first piece and rotates, and the latch member rotates accordingly, locking the runner. will be maintained until it opens. In this state, the limit switch engages with the actuator, configuring the circuitry of the drive device in a door-opening standby state. When the door is opened, the first piece moves together with the drive wire by the drive device, and the latch member follows the actuator and rotates in the runner release direction, releasing the runner from the locked state. Driven to release position. Therefore, there is no problem in getting on and off the vehicle due to opening and closing of the door. Here, when the vehicle is running with the seat belt in the fastened position, if excessive acceleration is applied to the vehicle body due to driving on a rough road or a collision, the pressing body moves to the second top in conjunction with the operation of the acceleration detection means. Engagement is possible. At this time, if the door is opened inadvertently, the first piece and the second piece move together with the drive wire in the direction of releasing the seatbelt because the driving device is configured in a circuit such that the limit switch is in the door opening standby state. The pressing body is then pushed by the second piece to press the locking pawl, and the locking pawl rotates and engages with the latch member, thereby holding the runner in the locked state. Therefore, even in the event of a collision, the runner can be reliably locked in the seat belt attachment position to ensure the safety of the occupants. On the other hand, in this case, the actuator rotates in accordance with the movement of the first piece, and the limit switch is disengaged from the actuator, thereby configuring the drive device to be in a door closing standby state. When the door is closed, the first and second links move together with the drive wire in the seat belt fastening direction, and the rotation of the actuator causes the limit switch to configure the drive device into a door-opening standby state, and the acceleration When the detection means returns to operation, the locking pawl rotates back and the locking state of the latch member is released. When the door is opened again from this state, the first piece fixed to the drive wire is moved by the drive device, and the latch member follows the actuator and rotates in the runner release direction, releasing the runner from the locked state. and the runner is driven to the seatbelt release position. Therefore, it is possible to prevent the seat belt from becoming unusable, such as becoming unable to release it.

【Example】

Hereinafter, one embodiment of the present invention will be described in detail based on the accompanying drawings. 1 to 3, reference numeral 1 indicates a latch device for a belt runner, which includes a latch means 3, an acceleration detecting means 4, a locking state holding means 5, a limit switch 8, and the like. and latch means 3
The limit switch 8 is housed in a latch base 1a provided at the end of the slide rail 2 on the center pillar side and fixed to the center pillar with an anchor bolt 1b. The latching means 3 includes an actuator 3b coaxially supported by a shaft 3a, a latching member 3c, a first piece 3f fixed to a drive wire 6, and a spring 3 that always biases the actuator 3b in the direction of the arrow in the figure.
It is composed of d, etc. The actuator 3b is connected to the first piece 3 fixed to the drive wire 6.
When f engages with the recess 3e, it is rotated in the counter-biasing direction, and its pressing surface 3g pushes the arm 8a of the limit switch 8 to open the limit switch 8. Here, the limit switch 8 is connected to the drive wire 6
The circuit is configured in a drive device (not shown) that drives the runner 7 via the door. The driving device is configured as a circuit in a door closing standby state for driving the runner in the seatbelt fastening direction. Further, the latch member 3c is adapted to follow the movement of the pin 3h of the actuator 3b through the elongated hole 3i, with a slight delay from the actuator 3b.
The runner 7 is locked by engaging the upper engaging portion 3j of the runners 3j and 3k with the groove 7a of the runner 7. The acceleration detection means 4 includes a weight 4b in a case 4a.
The weight 4b has an upper surface 4d having a spherical concave surface. The protrusion 4e provided on the arm 4c is always in contact with the upper surface 4d of the weight 4b, so that
The arm 4c is configured to swing up and down in accordance with the tilting of the weight 4b. Further, the locking state holding means 5 includes a claw member 5a pivotally supported in the slide rail 2, and an engaging portion 3k of the latch member 3c also in the slide rail 2.
an engaging pawl 5b pivoted nearby; a pressing body 5c interposed between the pawl member 5a and the engaging pawl 5b and capable of vertically sliding within the slide rail 2; and a third member fixed to the drive wire 6. The pressing body 5c includes a rotating member 5 which is pivotally supported with respect to the main body 5e.
f, and a presser 5h that is elastically supported by the main body 5e by a spring 5g. And acceleration detection means 4
When the claw 4f at the tip of the arm 4c swings upward as a result of the operation, the rotating member 5f rotates counterclockwise via the claw member 5a that engages with the claw 4f, thereby moving the second piece 5d. It's starting to look like it's in the middle of the route. Therefore, if the door is opened and the drive wire 6 is moved upward in the figure by the drive device (not shown), the second piece 5d presses the rotating member 5f and the pressing body 5
c is moved upward, the pusher 5h presses the engagement claw 5b by the restoring force of the spring 5g, and the tip of the engagement claw 5b comes into contact with the engagement portion 3k of the latch member 3c, releasing the latch member 3c. It is designed to restrict rotation in this direction. Next, the operation of the belt runner latch device of one embodiment constructed as described above will be explained. First, under normal driving conditions where no excessive acceleration is applied to the vehicle body, as shown in Figure 2 a and b,
The acceleration detection means 4 and the locked state holding means 5 have no effect. Therefore, as shown in FIG. 2a, when the door is closed and the drive wire 6 moves the runner 7 to the seatbelt fastening position by the drive device (not shown), the first piece 3f is moved to the actuator 3b.
The actuator 3b is rotated clockwise in the figure against the spring 3d by engaging with the recess 3e. Therefore, the actuator 3b presses the arm 8a of the limit switch 8 with its pressing surface 3g, and the limit switch 8 is opened and the drive device stops in the circuit configuration of the door opening standby state. At this time, the pin 3h of the actuator 3b locks the latch member 3.
c rotates behind the actuator 3b by the length of the elongated hole 3i, and its engaging portion 3j engages with the groove 7 of the runner 7.
a to lock the runner 7. Further, as shown in FIG. 2b, when the door is opened, the drive device is activated and the drive wire 6 starts moving to move the runner 7 to the seatbelt release position, the actuator 3b is moved to the first frame 3f. is disengaged, and rotates counterclockwise in the figure due to the restoring force of the spring 3d. Then, the arm 8a of the limit switch 8 is released to be in a closed state, and the drive device has a circuit configuration in a state of waiting for the door to be opened. At this time, the latch member 3c is rotated by the pin 3h of the actuator 3b with a delay of the length of the elongated hole 3i, and the engagement between the engaging portion 3j and the groove 7a is released, thereby preventing the movement of the runner 7. Not hinder. Next, while the vehicle is driving, it may come across a bad road,
Alternatively, when a large acceleration is applied to the vehicle body, such as in a collision, the acceleration detecting means 4 is tilted by the weight 4b in the case 4a, as shown in FIG. 3a.
Therefore, the protrusion 4e of the arm 4c is pushed up, the claw 4f at the tip of the arm 4c swings upward, the claw member 5a is rotated clockwise in the figure, and in conjunction with this, the rotating member 5f is rotated counterclockwise. direction to face the movement path of the second piece 5d. Here, since the drive device does not operate unless the door is opened, the latch member 3c of the latch means 3 remains locked to the runner 7, and when the excessive acceleration ceases to act, the latch device 1 is activated as shown in FIG. The state will be restored. However, if the door is opened inadvertently due to the impact of the collision or if the door is opened by mistake, the arm 8a of the limit switch 8 will be pushed by the pressing surface 3g of the actuator 3b and the limit switch 8 will open as shown in Figure 3a. Therefore, the drive device in the door open standby state is energized to move the drive wire 6 upward in the figure. So in this case,
As shown in FIG. 3b, the drive wire 6 moves upward, and the first piece 3f and second piece 5d move upward accordingly. The rotating member 5 of the locked state holding means 5 rotates counterclockwise in the figure due to the force and faces the movement path of the second piece 5d.
f is pushed up by the second piece 5d. Then, the main body 5e of the pressing body 5c along with the rotating member 5f is rotated by the spring 5.
By moving upward in the slide rail 2 while compressing the force of the pusher 5h, the pusher 5h rotates the engagement claw 5b clockwise in the figure by the restoring force of the spring 5g. On the other hand, at this time, the pin 3h of the actuator 3b has reached the end of the elongated hole 3i, and the latch member 3c is about to start rotating in the unlatching direction, that is, in the counterclockwise direction in the figure. Since the pawl 5b has already rotated clockwise and comes into contact with the engaging portion 3k, the latch member 3c cannot rotate, and its engaging portion 3j does not come out of the groove 7a of the runner 7. The locked state is maintained. In this latched state when the door is opened, the limit switch 8 is in the closed state because the arm 8a is separated from the pressing surface 3g of the actuator 3b, and the door is closed so that the drive wire 6, which is the drive device, can be moved downward in the figure. It is on standby. When the door is closed, the drive wire 6 is moved downward in the figure by the energization of the drive device, and the latch device 1 can return to the state shown in FIG. 3a.

[Effect of the idea]

As explained above, according to the present invention, when the door is closed and the runner reaches the seatbelt fastening position, the actuator engages with the first piece and rotates, and the latch member follows and rotates, so that the runner is locked and this state is maintained until the door is opened.
The limit switch engages with the actuator and the drive device is configured in a circuit to stand by for opening the door. When the door is opened, the drive device moves the first piece together with the drive wire, and the latch member follows the actuator. By rotating in the runner release direction, the locked state of the runner is released, and the runner is thereafter driven to the seatbelt release position. Therefore,
There is no problem in getting on and off the vehicle due to opening and closing of the door. Here, when the vehicle is running with the seat belt fastened, if excessive acceleration is applied to the vehicle body due to driving on a rough road or a collision, the pressing body can engage the second piece in conjunction with the operation of the acceleration detection means. becomes.
At this time, if the door is opened inadvertently, the first piece and the second piece move together with the drive wire in the direction of releasing the seatbelt because the driving device is configured in a circuit such that the limit switch is in the door opening standby state. The pressing body is then pushed by the second piece to press the locking pawl, and the locking pawl rotates and engages with the latch member, thereby holding the runner in the locked state. Therefore, even in the event of a collision, the runner can be reliably locked in the seat belt attachment position to ensure the safety of the occupants. On the other hand, in this case, the actuator rotates in accordance with the movement of the first piece, and the limit switch is disengaged from the actuator, thereby configuring the drive device to be in a door closing standby state. When the door is closed, the first and second links move together with the drive wire in the seat belt fastening direction, and the rotation of the actuator causes the limit switch to configure the drive device into a door-opening standby state, and the acceleration When the detection means returns to operation, the locking pawl rotates back and the locking state of the latch member is released. When the door is opened again from this state, the first piece fixed to the drive wire is moved by the drive device, and the latch member rotates in the runner release direction following the actuator, thereby releasing the runner from the locked state. ,
The runner is driven to the seat belt release position.
Therefore, it is possible to prevent the seat belt from becoming unusable, such as becoming unable to release it.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing an embodiment of the latch device for a belt runner according to this invention; Figs. 2 a and b are explanatory diagrams of the operation of the device in a state where no excessive inertial force is applied to the vehicle body; Figures 3a and b are diagrams for explaining the operation of the same device when excessive inertia is applied to the vehicle body, Figure 4 is a diagram for explaining the operation of the conventional system, and Figure 5 is a diagram of the conventional system and passive seat belt system. FIG. 3 is a circuit diagram showing the relationship with an electrical system. 1... Latch device, 1a... Latch base, 1
b...Anchor bolt, 2...Slide rail,
3... Latch means, 3a... Shaft, 3b... Actuator, 3c... Latch member, 3d... Spring,
3e... recess, 3f... first piece, 3g... pressing surface, 3h... pin, 3i... long hole, 3j... engaging part, 3k... engaging part, 4... acceleration detection means ,
4a...Case, 4b...Weight, 4c...Arm, 4d...Top surface, 4e...Protrusion, 4f...Claw,
5...Locked state holding means, 5a...Claw member, 5b
...Engaging claw, 5c...Press body, 5d...Second piece, 5e...Main body, 5f...Rotating member, 5g...
Spring, 5h...Press element, 6...Drive wire, 7...
...Runner, 7a...Ditch.

Claims (1)

[Claims for Utility Model Registration] A runner for a passive seat belt device that is driven by a drive wire via a drive wire by a drive device that operates in response to the opening and closing of a door, and moves along a slide rail in the direction of releasing or attaching the seat belt. A latching device for a belt runner that locks a seat belt in a seat belt wearing position by a latching means, which includes an acceleration detecting means for detecting excessive acceleration acting on the vehicle body, and an acceleration detecting means for detecting excessive acceleration acting on the vehicle body, and in conjunction with the operation of the latching means, when excessive acceleration is applied. In a belt runner latch device that includes a locking state holding means for holding the runner in a locked state, the latch means rotates by engaging with a first piece fixed to a drive wire of the runner at the seatbelt fastening position. and a latch member that is coaxially supported with respect to the actuator and rotates following the rotation of the actuator by engagement with a long hole and a pin, and the locking state holding means is When acceleration is applied, it becomes possible to engage the second piece fixed to the drive wire at the seatbelt wearing position in conjunction with the operation of the acceleration detection means, and in response to the movement of the second piece as the door opens. and an engaging pawl that rotates when pressed by the pressing body and engages with the latch member to maintain the runner locked state, and when the door is closed. The driving device is configured in a circuit in a door open standby state in which it engages with the actuator and drives the runner in the seat belt release direction, and when the door opens, the drive device is disengaged from the actuator and drives the runner in the seat belt fastening direction. A latching device for a belt runner, characterized in that a limit switch is provided which constitutes a circuit of the driving device in a door closing standby state.