JPS602210B2 - seat lock device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat lock device used in a removable rear seat back for an automobile such as a coupe type.

This type of sheet lock device that has been used conventionally includes:
Figures 1 to 3 (Nissan Motor Co., Ltd., ``Service Bulletin No. 336 (V-9)'', self-published in May 1972, No. 21)
(See page 5).

To explain the outline below, first, a latch 5 having a latch 4 is rotatably fixed to a base 3 fixed to the upper part of the side surface 2 of the rear seat bag 1 by a shaft 6, and the base 3 A spring 7 is interposed between the latch 5 and the latch 5 to constantly bias the latch 5 in the locking direction, that is, in the direction of arrow Y in FIG. In addition, a rubber ring 8 is arranged around the shaft 6 on the base 3, and a rubber ring 8 is connected to the lock groove 9 formed in the latch 5 to securely attach a striker 10 to the vehicle body (not shown). The parts 11 are engaged and locked. moreover,
The latch 5 is provided with a sliding surface 12 that is continuous with the lock groove 9 and slides onto the circumferential surface of the striker 10 after the striker 10 is impact-saddled.
is formed as. Further, at the lower part of the side surface 2 of the seat back 1, a pin la protruding from inside the seat back 1 is rotatably supported by a bracket lb fixed to the vehicle body (not shown). Therefore, the latch 5 and base 3 provided on the rear seat back 1 rotate together with the rear seat back 1, and when locking with the striker 10 attached to the vehicle body, the occupant moves the seat back 1 in the direction of arrow A in FIG. When rotated, the sliding rear surface 12 of the latch 5 is first moved by the striker 1.
0, the latch 5 rotates about the shaft 6 in the x direction against the spring 7 due to the rotational force of the occupant.
The sliding face 12 is kept in pressure contact with the engaging part 11, and the contact points with the engaging part 11 are changed one after another, and the latch 5 is rotated in the Y direction by the force of the spring 7 at the intersection where the sliding face 12 changes to the lock groove 9. Then, it engages with the engaging portion 11 of the striker 10 as shown in FIG. 2, and that position is maintained.

However, if a sudden load is applied in the forward direction to the seatback 1 equipped with such a conventional seat locking device, for example, if a load is applied due to sudden braking of a car, the seatback will lock around pin la. Since the striker 1 attempts to rotate in the direction of arrow B in FIG. 1, the lock groove 9 engaged with the striker 10 must be made structurally strong to withstand the tensile force. Further, in order to smoothly rotate the latch 5 in the x direction when it collides with the striker 10, the sliding bale surface 12 must have a large front-to-back dimension and a small inclination angle. Therefore, a sufficiently large structure is required in which a portion of the latch 5 including the sliding surface 12 communicating with the lock groove 9 is formed into a tongue-shaped enlarged portion 13. For this reason, the latch 5 cannot be made smaller than a certain level, and the length L from front to back including the latch 5 and the base 3 (Fig. 2)
is relatively medium-wide, and if the rear seat back is made thinner as shown by the chain line in Figure 2, the base 3 and the latch 5 will become larger than the thickness of the rear seat back 1 and will protrude back and forth, or will extend to the sides of the seat back 1. In the case of cars with four doors or more, when getting on and off from the seat, there is a risk of getting in the way of passengers and getting hit, so it is recommended to improve the seat lock device if the seat back is made thinner for the purpose of reducing costs. It was rare.

This invention was made in response to such conventional demands, and by providing a collapsible rear seat back for automobiles such as a coupe type with a latch mechanism that works in the compression direction, a novel seat that is as small as possible in the front and middle as a whole is created. It consists in obtaining a locking device. That is, the present invention relates to a sheet lock device having a base having a surface with which a striker collides, and a rotatable latch that urges the striker to come into pressure contact with the rear surface of the base against which the striker collides.

An embodiment of the present invention will be described below with reference to the drawings.

Note that the same configurations as those of the conventional example are indicated by the same reference numerals. 14
is the base to which the rear seat back 1 is fixed, 15
is an opening □ that communicates with the lock hole 16 of the base 14, through which an annular engagement village 18 of a striker 17 fixed to the vehicle body (not shown) can enter and exit.

Reference numeral 19 denotes a fan-shaped latch which is rotatably supported by a shaft 20, with a cylindrical portion 19a at a desired position within the lock hole 16;
The latch 19 is connected to the entrance part 1 by the coil spring 21 installed in the port.
It is biased towards the 5th side and is locked by the stepped stopper 22 of the lock hole 16, so that the contact surface 23 with the striker 17 faces the entrance part 15.

241 the arcuate outer peripheral surface (lock surface) of the latch 19;
Reference numeral 25 indicates an arc-shaped inner circumferential surface formed in the lock hole 16 and serving as a striking surface of the engagement punch 18, and these two circumferential surfaces 2
4 and 25, an arcuate gap 26 is formed into which the annular engagement punch 18 of the striker 17 can fit.

The arc-shaped gap 26 is formed between the arc-shaped inner circumferential surface 25 and the arc-shaped outer circumferential surface 24 so that it is narrowest at the stepped stopper 22 and gradually widens as it moves away from the stepped stopper 22. Further, an elastic material 27 such as rubber is disposed on a part of the arcuate inner circumferential surface 25 of the lock hole 16 at a location where the annular engagement punch 18 of the striker 17 collides with the striker 17 and the latch 19. I make sure to wear it. Reference numeral 28 denotes an opener, that is, an insertion hole for a rod 29 closed above the lock hole 16, and is pivoted to the latch 19. By pulling up the rod 29, the latch 19 is rotated in the Z direction about the ratchet 20, and the striker is inserted. 17 can be disengaged from the annular engagement village 18.

Reference numeral 30 is an abutment part made of rubber or the like, and is embedded in the lower inner side of the insertion hole 28 where the latch 19 abuts and misses.

The operation of this invention will be explained based on the above configuration.

Lay the rear seat back 1 in the direction of arrow C in Figures 4 and 5,
When the base 14 reaches the striker 17 fixed to the vehicle body, the contact surface 23 of the latch 19 facing the opening 15 of the base 14 abuts against the annular engagement village 18 of the striker 17, causing the latch 19 to resist its coil spring 21. and rotate the striker 17 in the Z direction about the shaft 20.
The annular engagement punch 18 collides with the elastic member 27 of the arcuate inner circumferential surface 25 of the lock hole 16 .

When this state is reached, the annular engagement punch 1 of the striker 17
8 faces the arc-shaped gap 26), the latch 19 is released from the divine pressure, and the tension of the coil spring 21 causes the latch 19 to rotate in the opposite direction to the arrow Z in FIG. The annular engagement village 18 can be reliably sandwiched between the arcuate outer circumferential surface of the latch 19, that is, the locking surface 24, and the elastic material 27. Also, if the rod 29 is pulled upward, the latch 19 will move the coil spring 2 around the shaft 20.
1 in the Z direction and disengages the striker 17 from the annular engagement punch 18, so the rear seat backpack can freely rotate. In the above embodiment, when the striker 17 engages and locks with the latch 19, the striker 17 extends in an oblique direction from the outer peripheral locking surface 24 of the fan-shaped latch 19 toward the contact surface 23, as shown by the dotted line in FIG. The latch 19 works to keep the latch 19 locked in the compression direction, and the locking position with the striker 17 can be locked in a relatively narrow state with a length of 1' from the closing part 15 of the base 14, so that the entire body including the base 14 can be locked. The length 1 of can also be made smaller.

In the above-mentioned embodiment, the latch 19 is shaped like a fan, and its main part is the cylindrical part 19a, which is rotatably attached to the shaft 201 of the base 14. However, the latch 19 does not need to be shaped like a fan. Any suitable plate-shaped body such as a triangle or a rectangle may be used.

In short, any material that can hold the annular engagement village 18 of the striker 17 within the base 14 may be used. When the striker 17 is also fixed to the vehicle body, it is of course possible to install the striker 17 at a location corresponding to the base 14 behind the rear seat back 1. base 1 on the side of
It may be made to correspond to 4. As described above, according to the present invention, the latch of the base fixed to the seat back has a structure in which the locking engagement with the striker can be made between the locking surface on the outer periphery and the bushing surface of the base. The latch should engage the striker in the compression direction when a forward load is applied to the seat back.
Also, since the axis of rotation of the latch is on the striker side, the angle between the contact surface with the striker and the engagement punch of the striker must be made small. can be made smaller than that of the conventional example, and therefore the entire front-to-back length including the base can be made smaller, making it possible to downsize.

Further, by operating the opener and rotating the latch, the engagement with the striker can be easily released.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a seat lock device of conventional structure applied to the rear seat back, Fig. 2 is an enlarged front view of the seat lock device of Fig. 1, Fig. 3 is a sectional view of the same, and Fig. 4
The figure is an exploded perspective view of an embodiment of the seat lock device according to the present invention when it is attached to a rear seat back, and FIG. 6 is an explanatory view of the cross-sectional view W- in FIG. 5, and FIG. 7 is a skin-to-skin line cross-sectional view of the same. 1...Rear seat back, 3,14...Base, 5,1
9...Latch, 6, 20...Shaft, 10, 17...
・Striker, 13...Language-shaped enlarged part, 1
6... Lock hole, 21... Coil spring, 23... Contact surface, 24... Arc-shaped outer peripheral surface (lock surface), 25... Arc-shaped inner peripheral surface, 26・
......Circular gap, 29...Rod (opener)
. Figure 1 Figure 4 Figure 2 Figure 3 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] 1. In a seat lock device having a striker fixed to the vehicle body, a base fixed to a rotatable seat bag, and a latch rotatably provided on the base and detachable from the striker, rotation of the latch A seat lock device characterized in that a shaft is provided in the vicinity of an opening in the base through which the striker can freely move out, and the striker is brought into pressure contact with the striker contacting surface of the base by the latch.