JPH029715Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a reclining device for an automobile seat.

Conventionally, as shown in FIG. 1, the reclining device described above has a plurality of engagement grooves 4,... 4 is fixed, and the frame 6 of the seat cross 3 is inserted into one of the engagement grooves 4, . . . 4 of the sector member 5.
A system has been proposed in which the tilting position of the seat bag 3 is adjusted by engaging and disengaging a striker 7 that is swingably pivoted to the seat by pushing and pulling a hand-operated knob 8 (for example, Japanese Utility Model Application Publication No. 171402/1983). has been done.

However, when an overload is applied to the seat back 3 due to a sudden stop or a collision, the striker 7 may rotate and unexpectedly come off the engagement groove 4 of the sector member 5, which is very dangerous.

This invention was made in view of the above-mentioned conventional problems, and a striker rotatably pivoted to the frame of the seat bag is engaged with one of the plurality of engagement grooves of the sector member fixed to the vehicle body. In the reclining device for adjusting the tilting position of the seat back, the striker is pivotally connected to the seat back frame via an elastic bushing so that it can be displaced by a predetermined amount when a load is applied to the striker. An engaging protrusion is formed,
The seatback frame supports a blocking member in which a groove is formed with which the engagement protrusion engages, and the groove is located between the engagement position of the striker with the engagement groove and the withdrawal position. A movement permitting groove into which the mating protrusion is loosely fitted, and a movement permitting groove extending in the longitudinal direction of the vehicle body continuously with the movement permitting groove, and in a state where the striker is displaced, the engaging protrusion can be guided in the longitudinal direction of the vehicle body to prevent rotation of the striker. This invention provides a reclining device for an automobile seat characterized by a rocking prevention groove that prevents the striker from accidentally slipping out of the engagement groove when an overload is applied to the seat back. .

Hereinafter, embodiments of this invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the frame 11 of the seat bag 10 has a structure in which a portion corresponding to a sector member 12 fixed to the vehicle body is connected with a lock frame 13, and one side wall 13a of the lock frame 13.
A bearing bush 16 made of an elastic material that supports one side shaft portion 15a of a roughly U-shaped striker 15 is fitted into the shaft hole 14 drilled in the shaft hole 14.
A wire spring 17 and a bearing bush 18 made of an elastic material that supports the other side shaft part 15b are fitted into the other side shaft part 15b, and the bearing bush 18 is inserted into the shaft hole of the lock plate (blocking member) 21. 22, and the lock plate 21 is integrally fixed to the other side wall 13b of the lock frame 13 with screws 23, 23.

Therefore, the striker 15
3 and a lock plate 21, one end of which is latched to a striker auxiliary piece 24 that is integrated with the striker 15, and the other end of which is latched to the bearing bush 18. 12 engagement grooves 12a, ..., 1
It is biased in the direction of engagement with 2a.

The lock plate 21 has a stopper portion (engaging protrusion) protruding from the striker auxiliary piece 24.
25 is provided with an arc-shaped movement permitting groove 26 which is loosely fitted between the engagement position and the withdrawal position of the striker 15, and is continuous with the lower end of the movement permitting groove 26 to guide the stopper part 25 in the front-rear direction. A possible rocking prevention groove 27 is provided.

If the reclining device is configured as described above, the manual knob is pushed down and the rod 28 is in the lowered position, as shown in FIG. 12a, if an overload F is applied to the seat back 10 by the striker 15 through the engagement groove 12a of the sector member 12 due to, for example, a collision from the rear side of the vehicle body, as shown in FIG. If the bearing bushes 16 and 18 are rigid, the striker 15 will be swung in the direction of removal from the engagement groove 12a, but since the bearing bushes 16 and 18 are made of elastic material, the striker 15 will be displaced in the load direction F. At the same time, the stopper portion 25 of the striker auxiliary piece 24 engages with the rocking prevention groove 27 of the lock plate 21 fixed to the frame 11 of the seat bag, so that the rocking of the striker 15 is prevented, and the movement of the striker 15 from the engagement groove 12a is prevented. Escape will be prevented.

Therefore, there is no risk that the striker 15 will unexpectedly come out of the engagement groove 12a and the seat bag 10 will unexpectedly fall forward. Furthermore, even if an overload is applied to the seat back 10 from the front side, there is no risk of the seat back being accidentally tipped backwards.

On the other hand, if you pull up the manual knob under normal conditions,
As the rod 28 rises and the stopper portion 25 passes through the movement allowance groove 26, the striker 12 moves into the engagement groove 1.
2a, and in this state seat back 10
When the manual knob is released after adjusting the swing angle of the striker 15, the wire spring 17 moves the striker 15 into the corresponding engagement groove
2a, the adjustment of the tilting position is completed.

In the above embodiment, the lock plate 21 is provided with a movement permitting groove 26 and a swing preventing groove 27, but as shown in FIG.
5a', 15b' are formed flat, and the bearing bushes 16', 1 are fitted into the lock plate.
A swing prevention groove 29 may be provided in 8'. in this case,
The shaft portions 15a', 15b' constitute engagement protrusions on the striker side, the bearing bushes 16', 18' constitute blocking members, and the shaft portions 1 of the bearing bushes 16', 18'
The fitting holes 5a' and 15b' constitute movement permitting grooves.

In this embodiment, when the striker 15 is displaced in the load direction, the flat shaft portions 15a' and 15b' engage with the swing preventing portion 29, so that the striker 15 is prevented from swinging.

In this case, the lock plate is provided with fitting holes that coincide with the bearing bushes 16', 18'.

As is clear from the above description, this invention pivots the striker to the seatback frame via an elastic bush, and provides a stopper to the seatback frame to prevent rotation of the striker when the striker is displaced. Since this member is provided, there is no fear that the striker will come off from the engagement groove of the sector member even if an overload is applied to the seat back during a sudden stop or a collision, which is advantageous in terms of safety measures.

[Brief explanation of the drawing]

Figure 1 is a side view of a conventional reclining device.
Fig. 2 is an exploded perspective view of the reclining device according to this invention, Fig. 3 is a side view of the reclining device according to this invention, Fig. 4 is an enlarged sectional view of the main part of Fig. 3, and Fig. 5 is a modified example. It is a sectional view of a fitting part of a bearing bush and a striker. 10... Seat bag, 11... Frame, 1
2...Sector member, 12a...Engagement groove, 13...
... Lock frame, 15 ... Striker, 16,
18...Bearing bush, 17...Wire spring,
21... Lock plate, 24... Striker auxiliary piece, 25... Stopper part, 26... Arc groove, 2
7, 29... Rocking prevention groove.

Claims (1)

[Claim for Utility Model Registration] A striker rotatably pivoted to the frame of the seat bag is engaged with one of a plurality of engagement grooves of a sector member fixed to the vehicle body to adjust the tilting position of the seat bag. In the reclining device, the striker is pivotally connected to the seat back frame via an elastic bushing so that it can be displaced by a predetermined amount when a load is applied to the striker, and an engaging protrusion is formed on the striker side, A blocking member is supported on the back frame, and the blocking member is formed with a groove in which the engagement protrusion engages, and the groove is located between the engagement position of the striker in the engagement groove and the withdrawal position of the engagement protrusion. a movement permitting groove into which the movement permitting groove is loosely fitted; and a movement permitting groove extending in the longitudinal direction of the vehicle body continuously with the movement permitting groove, and in a state in which the striker is displaced, the engaging protrusion can be guided in the longitudinal direction of the vehicle body to prevent rotation of the striker. A reclining device for an automobile seat, characterized by comprising a rocking prevention groove.