JPS5848899Y2 - Seat slide device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat slide device for an automobile, particularly to the structure of a slide lock mechanism.

As shown in FIGS. 1 to 3, a conventional seat slide device 1 has the following configuration.

That is, a lower rail 2 fixed to the floor (not shown), and an upper rail 3 fitted to the lower rail 2 so as to be slidable back and forth.
a stopper plate 6 fixed to the lower rail 2 and having a plurality of teeth 4 and gaps 5 alternately formed in the front and rear; and a stopper plate 6 on the upper rail 3 that is rotatable in a horizontal plane on the upper surface of the upper rail 3 by a pin 9. The upper rail 3 and the lower rail 2 are always biased in the direction of being inserted into the gap 5 between the teeth 4 of the stopper plate 6 by a return spring 11 that is pivotally supported by the lock holder, which will be described later. It consists of a lock plate 7 that restricts sliding.

7' in FIG. 2 is the position when the lock plate 7 is fully opened.

Reference numeral 8 denotes a lock holder installed between the upper rail 3 and the lock plate door, and when the lock plate 1 is inserted into the gap 5 between the teeth 4, it contacts or approaches the front and rear rib surfaces of the lower rail. It has the function of suppressing deformation of the lock plate 7 when force is applied in the sliding direction of the lock plate 2 and the upper rail 3.

Reference numeral 10 denotes a through hole or notch (a through hole in this embodiment) formed in the lock plate 7 and in which the tooth 4 can be freely engaged and disengaged.

The lock plate 7 has a structure in which, for example, an end of a connecting wire 13 is connected to the lock plate 7, and the wire 13 is pulled to rotate around the pin 9.

However, the lock plate 7 is not securely locked to the tooth 4 as shown by the solid line in FIG. 2, and as shown in FIG. When the upper rail 3 is running in an unstable state, that is, in a half-locked state while being pressed against the upper rail 3, when sudden braking is applied, a sudden force is applied to the upper rail 3 in the sliding direction.
The lock plate 7 integrated with the upper rail 3 has teeth 4°4.
．． The tip of ...... slides like a bridge (sled) to the most forward or last position (depending on the position of pin 9) and is not locked.

If the upper rail 3 slides in this way, the drive position will change, causing erroneous operation due to the positional relationship with the accelerator pedal, brake pedal, clutch pedal, etc., which may directly lead to an accident.

There is also a seat slide device as shown in Japanese Patent Publication No. 50-25218, but it has the same problem because the lock plate rotates in the vertical direction.

The present invention was developed in view of the above-mentioned circumstances.The lock plate is rotatably supported on the upper surface of the upper rail in a horizontal plane, and the tip of each tooth of the stopper plate is attached to both openings of the through hole or notch. By slanting the edge so that the corner facing the inner opening edge protrudes from the center of rotation of the lock plate, when a longitudinal force is applied to the seat in a half-locked state, To provide a seat slide device in which a locking plate engages with a tooth in contact with the tooth or a tooth next to the tooth to ensure locking operation.

An embodiment of the present invention will be described with reference to FIGS. 4 to 6.

Note that the same numbers are used for the same or equivalent members as those shown in FIGS. 1 to 3, and the description thereof will be omitted.

In the present invention, as shown in FIG. 4, each tooth 4, 4. . . . The tip of the through hole or notch 100 has a corner portion opposite to the inner opening side edge protruding with respect to the rotation center (pin 9) of the lock plate 70 of both opening side edges. Tilt it like this.

In this figure, the solid line shows the lock plate 7 in the locked state, and the chain line shows the lock plate 7 in the locked off state.

In addition, in FIG. 5, the dotted line portion shows the conventional tooth 4'.

Since the present invention has such a configuration, when a force F is applied to the upper rail 3 to slide it to the right while the lock plate 7 is in the semi-locked state as shown in FIG. 6, the lock plate 7 is locked as shown in FIG. The plate T also moves together, but in this case, the tips of the teeth 4 of the stopper plate 6 that are in contact are on the inner opening side of both opening side edges of the through hole or notch with respect to the rotation center of the lock plate. The corner opposite the edge is inclined so as to protrude, and the lock plate 7 is biased in the direction of contacting the inclined surface of the tooth 4, so that the lock plate 7 slides on the inclined surface of the tooth 4. Then, the inner peripheral edge of the through hole 10 contacts and interferes with the side surfaces of the teeth 4 in sequence, and both slide rails 2 and 3 can be reliably stopped, and even if they slide, the teeth 4 and 4 There is only a gap of 50 dimensions.

Furthermore, even if a sliding force F' is applied to the upper rail 3 to the left in the half-locked state, the lock plate 7 is biased counterclockwise by the spring 11 and the inclined surface of the tip of the tooth 4 is applied to the upper rail 3. As shown in FIG. 6, as shown in FIG. 6, the slide rails 2 and 3 remain in this state without climbing over the tip of the slope, and both slide rails 2 and 3 remain reliably stopped.

Therefore, according to the present invention, even if the seat slide device is in a half-locked state, the amount that it slides due to sudden braking is only the gap between the largest teeth, and after that it is securely locked, so the drive A safe seat sliding device whose position hardly changes can be obtained.

[Brief explanation of drawings]

Figure 1 is a perspective explanatory view of a conventional seat slide device;
The figures are an explanatory view from the arrow in Fig. 1, Fig. 3 is an explanatory view showing that the lock plate in Fig. 2 is in a half-locked state, and Fig. 4 is an explanatory view showing the lock plate in Fig.
The figure is a plan view for explaining the main parts of a seat slide device according to an embodiment of the present invention, FIG. 5 is a partially enlarged view, FIG. 7
The figure is an explanatory view of the operation showing that the lock plate interferes with successive teeth in a half-locked state. 2... Lower rail, 3... Upper rail, 4... Teeth, 6... Stop bar plate, 7... Lock plate, 11・・・・・・
··spring.

Claims (1)

[Scope of utility model registration request] a lower rail fixed to the floor; an upper rail fitted to the lower rail so as to be slidable back and forth; a stopper plate fixed to the lower rail and having a plurality of teeth formed in the front and rear;
A through hole or notch is formed on the upper surface of the upper rail to be rotatably supported in a horizontal plane and to mesh with the teeth of the stopper plate, and the through hole or notch is oriented in a direction to mesh with the teeth. In the seat slide device, the seat slide device includes a lock plate that is biased to restrict sliding of the upper rail and the lower rail, and the tip of each tooth of the stopper plate is connected to the rotation of the lock plate among both opening side edges of the through hole or notch. A seat slide device characterized in that the corner portion facing the inner opening side edge is inclined so as to protrude with respect to the center of motion.