JPS625409Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention latches the runner member in the passive seat belt system when it comes to the occupant restraining position in conjunction with door closing, etc., and latches it in conjunction with door opening, etc. The present invention relates to a latch device that releases the runner member when the occupant is to be moved from the occupant restraint position to the occupant release position.

Conventionally, in many latch devices, even when the runner member is not in the occupant restraint position, the pawl member for engaging the runner member is in an engaging position, and when the runner member is in the occupant restraint position, the pawl member is temporarily disengaged. position, and then when the runner member fully reaches the occupant restraint position, the pawl member often returns to the engaged position and latches with the runner member.

On the other hand, the latching system generally needs to be provided with a warning switch to determine whether the pawl member and runner member are truly latched.

However, in the warning device of a conventional latch device having a pawl member that moves in the manner described above, there is a one-to-one relationship between the pawl member being in the engaged position and the pawl member being engaged with the runner member. Since there is no correspondence, two independent switching means for detecting the positions of both the runner and pawl members are required to determine whether the pawl and runner members are truly latched.

In other words, when the runner member is driven by an electric means such as a motor, in addition to the switch means for detecting that the runner member has reached the occupant restraining position and stopping the motor, etc., the position of the pawl is A dedicated switch means is required for the latch warning to be detected.

The necessity of two switching means in the latching device has the drawbacks that it tends to be less reliable, increases the size of the device, and increases the cost of manufacturing it.

Therefore, an object of the present invention is to solve this problem by providing a method for detecting the position of the pawl member by bringing the pawl member into the meshing position only when the runner means comes to the occupant restraining position. The switch means alone can function as a warning device, and if the runner means is electrically driven, it can also be used as a switch means for stopping electrical means such as a motor, thereby improving reliability. To provide an inexpensive and compact latching device.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the appearance of an example of a two-point passive seat belt system to which an embodiment of the present invention is applied. In this example, the runner member 1 moves along a guide rail 2 as a guide member fixed to the side roof in conjunction with the opening and closing of the latch, and moves to the passenger release position shown in the figure and a latch base 3 as a base member.
This sliding movement is caused by a cable 6 (second
(Fig.) is moved.

Of course, the runner member 1 can also be driven mechanically using the door opening/closing force. Furthermore, in the illustrated seat belt system, the webbing 7 extends from the retractor 9 attached to the inner side of the seat 8 and reaches the runner member 1, and the area around the runner member fixation part of the webbing 7 causes the occupant to hit the ear or cut the neck. The decapitation prevention part 7a is designed to eliminate the problem and improve the ease of getting on and off the vehicle. Note that the retractor 9 may be fixed to the floor of the vehicle or may be attached so as to be movable in the front and rear directions.

Next, a first embodiment consisting of a mechanism inside the latch base 3 at the rear end of the guide rail 2 will be described with reference to FIGS. 2 to 5. The runner member 1 includes
A sliding member (not shown) that slides in the groove of the guide rail 2 is fixed, and has an engaging portion 1a for engaging with a pawl 12, which will be described later. The attached swinging member 13 is swingably mounted around a pin 14. The runner member 1 also has a protrusion 1c on its rear upper surface that functions as described below.

The swinging member 13 has a position where the operating protrusion 13a completely retreats from the engaging part 1a and the member 13 abuts the stopper pin 15, and a position where the protruding part 13a completely covers the engaging part 1a and the lower part of the member 13. The front end surface 13b is swingable between a position where it comes into contact with the lower rear end surface 1b of the runner member 1.

Further, the swinging member 13 has a relief groove 13c that extends slightly in the direction in which the cable 6 moves, so that the cable 6, that is, the cable terminal 6a, can move therebetween. The runner member 1 and the swinging member 13 constitute a runner means that can be moved between an occupant restraint position and an occupant release position.

On the other hand, the latch base 3 is fixed to the vehicle body by a fastening member such as a bolt, and a pawl 12 is supported in a fan-shaped hole 3a of the latch base 3 so as to be movable between an engaged position with the engaging portion 1a and a non-engaged position. This pawl 1
2 is biased toward the meshing position by a biasing member (not shown).

Further, a locking slider 16 as a locking member for locking the pawl and a switch 17 for detecting the position of the pawl are attached to the latch base 3. The slider 16 is supported by a support member 18 fixed to the latch base 3 so as to be slidable in a direction parallel to the moving direction of the runner member 1, and is always urged forward by a spring 19. The slider 16 has a notch 16a at its front upper part into which the rear end of the pawl 12 can be received, and a lower front part which has a notch 16a into which the protrusion 1c of the runner member 1 is fitted. A slot 16b having a corresponding cross-sectional shape is formed. switch 1
7 has an actuator 17a which is operated by the pawl 12, so that the switch 17 can output a signal corresponding to the position of the pawl 12.

The function of this switch 17 is that when the runner member 1 is electrically driven as in this embodiment, it detects that the runner member 1 has come to the occupant restraint position and stops electrical means such as a motor, and also stops the pawl 12 and the runner. It serves as a warning device to check whether the member 1 is fully latched. If the runner member 1 is mechanically driven, it serves as a warning device.

The operation of the first embodiment having the above configuration will now be explained.

When the movable anchor 1, etc. in the front occupant release position moves rearward due to the movement of the cable 6 linked when the door is closed, the swinging member 13 receives a rotational force in the counterclockwise direction in FIG. They are in contact with each other and are moving toward the occupant restraint position. At this time, the slider 16 is in the locked position and the pawl 12 is maintained in the non-meshing position by the notch 16a of the slider 16, so when the runner member 1 enters the latch base 3, the protrusion 1
c directly enters the slot 16b of the slider 16. Then, when the end surface of the protrusion 1c comes into contact with the terminal end surface of the slot 16b, as shown in FIG. Almost at the same time as the pawl 12 is removed from the notch 16a of the pawl 16, the pawl 12 falls into the engaging portion 1a and the two engage with each other. This situation is illustrated in FIG. In this way, the latched state in the occupant restraint position is achieved.

At this time, the load applied to the webbing 7 fixed to the runner member 1 is
2 and is transmitted to the latch base 3 and received by the vehicle body via the fastening member of the latch base 3. Furthermore, even if the cable 6 were to move slightly forward due to its own inertia in the event of a collision, the swinging member 13 would move and the pawl 12 would be erroneously moved in the direction of the non-meshing position due to the relief groove 13c. There is no need to put it away.

Next, when the runner member 1, etc. is about to move in the direction of the occupant release position, the cable 6 first runs idly by the amount of escape from the relief groove 13c, and then the swinging member 1
3, the swinging member 13 pushes up the pawl 12 with the protrusion 13a to the non-meshing position, and almost at the same time, the swinging member 13 moves the runner member 1 at the end surface 13b.
It hits the end face 1b of. This state is shown in FIG.

In this state, the runner member 1 and the swinging member 13 move together toward the occupant release position. Then, as the runner member 1 moves away from the occupant restraining position, the slider 16 follows the runner member 1 and is pushed forward by the spring 19, and the pawl 12, which has already been brought to the non-meshing position, is pushed out by the notch 16a. and hold it there. This state is shown in FIG.

In this way, the pawl 12 waits while being maintained in the non-meshing position by the slider 16 until the runner member 1 comes to the occupant restraining position again.

Next, a second embodiment illustrated in FIGS. 6 to 8 will be described. The main difference between the second embodiment and the first embodiment is that the swing member 13 becomes a slide member 23, and the pawl 12 is moved by this cam portion 23a. Components having the same reference numerals as those in the first embodiment indicate that they are essentially the same as those in the first embodiment.

The slide member 23 has a groove 23b in which two pins 21 implanted in the runner member 21 are inserted.
d and 21e are fitted. Therefore, the slide member 23 can slide in the direction of movement of the runner member 21 within a predetermined range. A terminal 6a of the cable 6 is attached to the downward protrusion 23c of the slide member 23.

The pawl locking slider 26 naturally has a locking notch 26a, and the front end surface 26b of the pawl locking slider 26 is connected to the rear end surface 21 of the runner member 21.
It comes into contact with c and is slid.

When the runner member 21 and the like move to the rear occupant restraining position, the slide member 23 is in a position moved rearward with respect to the runner member 21, and the cam portion 23a is completely retracted from the engaging portion 21a. . Therefore, the runner member 21 is the slider 2
Almost at the same time as the pawl 6 is pushed rearward and completely reaches the occupant restraint position, the pawl 12 that had been held in the non-engaged position by the slider 26 (see Fig. 8)
becomes free and engages with the engaging portion 21a as it is, achieving a latched state as shown in FIG.

When attempting to move toward the occupant release position, the slide member 23 is first moved to the forward position by the cable 6, and the cam portion 23a moves into the engaging portion 21a, pushing the pawl 12 up to the non-meshing position. . Then, when this pushing up is almost completed, the runner member 21 and the slide member 23 begin to move forward together, thereby causing the slider 26, which had been pushed backward until then, to move forward.
follows the runner member 21 and comes forward to hold the pawl 12 pushed upward as shown in FIG. 8 in that state. In this way, a state of waiting for the runner member 21 etc. to return to the rear is realized.

As described above, according to the present invention, there is a one-to-one correspondence between the state of the pawl member and the latched and unlatched states, which improves the reliability of the switch means for stopping motors, etc., and the switch means for warning devices for checking the latched state. At the same time, one switch means can serve multiple purposes, making the device compact and inexpensive.

[Brief explanation of the drawing]

Fig. 1 is an external view of a passive seat belt system to which an embodiment of the present invention is applied, Figs. 2 to 5 are explanatory diagrams of the first embodiment of the present invention, and Figs. 6 to 8 are illustrations of the present invention. FIG. 2 is an explanatory diagram of a second embodiment of the present invention. Explanation of symbols of main parts, runner members...1,
21, Base member...3, Drive member...6, Pawl member...12, Guide member...2, Switch means...17, Pawl member engaging portion...1a, 21a,
Locking member...16, 26, Movable member...13, 2
3. Locking member biasing means...19.

Claims (1)

[Claims for Utility Model Registration] 1. A latch device for a runner member used in a passive seat belt system, which is connected to a drive member that moves in conjunction with the opening and closing of a vehicle door, etc., and is fixed to the vehicle body by the drive member. a runner means that is moved between an occupant restraint position and an occupant release position along a guide member provided therein and has a pawl member engaging portion; runner means that is engageable with the engaging portion by a base member fixed to the vehicle body; a pawl member movably supported between an engaged position and a disengaged position capable of engaging the pawl; a locking position for locking the pawl member in the disengaged position when the runner means is not in the occupant restraint position; and a runner; a locking member movably mounted to the vehicle body between an unlocked position and a locking position that allows movement of the pawl member to the engaged position when the means assumes the occupant restraint position; When the pawl member moves to the meshing position, it moves to follow this movement and takes the meshing detection position, and when the pawl member moves to the non-meshing position, it moves to follow this movement and takes the non-meshing detection position. A latch device characterized in that it has interlocked switching means; 2. The runner means includes a runner member on which the engaging portion is formed; the pawl member and the engaging portion are connected to the runner member when the runner member is moved from the occupant release position to the occupant restraint position; between a first position in which the runner member is engageable and a second position in which the runner member engages and brings the pawl member from the engaged position to the disengaged position when the runner member is moved from the occupant restraint position to the occupant release position; 2. A latch device according to claim 1, characterized in that the latch device comprises: a movable member movably mounted on a movable member and to which an end portion of the drive member is attached. 3. The latch according to claim 2, wherein the switch means is for a warning device for checking whether or not the runner member and the pawl member are completely engaged. Device. 4. The switch means is for stopping the electric means when the runner member reaches the occupant restraining position when the drive member that moves the runner member is driven by electric means. A latch device according to claim 3 of the utility model registration claim, characterized in that: 5. The locking member is biased toward the locking position by a biasing means and is slidable between the locking position and the non-locking position, and the runner member moves to the occupant restraining position. When the runner member starts moving from the occupant restraint position to the occupant release position, the runner member contacts the runner member and is moved from the locking position to the unlocking position. The latch device according to claim 2, wherein the latch device is moved from the non-latching position to the locking position by the urging force of the urging means.