JPH0357160Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a reclining device for a rear seat in a vehicle such as a van, which allows the upper end of the seat back to come into contact with the floor surface of the luggage compartment when the seat back is tilted rearward.

[Technical background of the invention and its problems]

In a vehicle such as a van, if you want to load a large number of items into the luggage compartment, you can open the luggage compartment 3 by folding the seat back 1 of the rear seat and rotating it to the rear of the front seat 2, as shown in Figure 13. As shown in Figure 14,
The seat bag 1 was tilted to a horizontal position, and the luggage 4 was stored on its upper surface. As shown in detail in FIG. 12, the one shown in FIG. 14 has a reclining cover 9 equipped with an operating lever 7 and a lock release lever 8 installed between the seat cushion 6 and the seat back 1, and the seat back 1 To tilt the seat back, first pull the lock release lever 8 toward you to release the locked operating lever 7, then pull the operating lever 7 upwards to tilt the seat back 1 from an upright position to a horizontal position. Thereafter, when the lock release lever 8 is released, the seat bag 1 is held in a horizontal position.
However, in such a conventional device, when both the rear horizontal position and the forward tilted position are possible, as shown in FIGS. 3 and 4 of Japanese Utility Model Application No. 59-59147, Since the lever for backward tilting and the lever for tilting forward are provided separately, there are problems in terms of operability and securing space.
Also, if we focus on rearward tilting, a locking device separate from the lever described above is required to prevent the seatback from falling over due to its own weight when the rearward tilting lever is operated unexpectedly. There was also a need for something that was reliable and had excellent operability.

[Purpose of invention]

This idea was made in consideration of the above circumstances, and its purpose is to ensure a horizontal rear position by tilting backwards at the first pivot point, and to tilt forwards at the first pivot point. By using a second pivot point that is different from the pivot point of the rear seat, the purpose is to facilitate the tilting movement of the rear seat and ensure that the rear seat is prevented from tilting backwards, assuming that the rear seat can be folded up reliably. .

[Summary of the idea]

In order to achieve the above object, this invention is pivoted via a rotation shaft 31 as a first pivot point and swings between a first relative position and a second relative position with respect to the rear end of the seat cushion. A sector gear 29 as a movable member is provided, and is pivoted to the sector gear 29 at a rotation shaft 35 as a second pivot point different from the rotation shaft 31, and a third
It can swing between a relative position and a fourth relative position, and when it is in the first relative position of the sector gear 29 and reaches the third relative position, it becomes a forward tilted position and reaches the fourth relative position. The seat back 1 is configured such that when the sector gear 29 is in the upright position, the sector gear 29 is in the second relative position, and when the sector gear 29 is in the fourth relative position, it is in the rearward reclined position.

In order to fix the sector gear 29 at least in the first relative position, the engaging part 30 is capable of engaging with the locking part 32 of the sector gear 29, and the engaging part 30 is engaged with the locking part 32. A lock gear 27 is provided as a locking member that is movable between an engaged position and a detached position where the engaging portion 30 is released from the locking portion 32. An engagement hole 25 constituting a connecting portion to be connected is formed, and the lock gear 27 is pivotably supported on a pivot pin 21 serving as a third pivot point to move the lock gear 27 as the plate pivots. A pin 22 is provided at the other end of 20.

Furthermore, it is pivoted at a pin 12 serving as a fourth pivot point, and the operating section 13 and the pin 12 are
A guide hole 14 is formed as a long hole that extends in the circumferential direction centering on and into which the pin 22 is inserted. is located at one end of the guide hole 14 and moves the lock gear 27 from the engagement position to the disengagement position via the pin 22, and the operation section 13 moves from the first operation position to the first operation position across the first operation position. 3rd position opposite to the 2nd operating position
The operating lever 11 allows the pin 22 to move toward the other end within the guide hole 14 when moving to the operating position.
will be established.

The axis of the pivot point of the pivot pin 21 and the pin 2
A cam hole 18, into which the pin 22 is inserted, is pivotally supported at a pin 16 as a fifth pivot point located away from a plane containing 2 and can swing between a locked position and an unlocked position. A lock release lever 15 is provided which forms a part of the cam hole 18 and extends in the circumferential direction around the pin 16 to engage with the pin 22 when the lock gear 27 is in the engagement position. a first cam hole, which forms a side edge of the first cam hole, and which engages with the pin 22 to restrict the swinging of the plate 20 when the lock release lever 15 is in the lock position; Engagement step portion 18a as a mating edge portion,
It forms a part of the cam hole 18 and is connected to a portion of the first cam hole where the pin 22 is located when the lock release lever 15 is in the unlock position, so that the operation lever 11 can be operated. A second cam hole portion through which the pin 20 can pass when the portion 13 moves from the first operating position to the second operating position, and a notch portion 34a as a second locking portion provided on the seat back 1 side. A lock plate 36 is provided as a movable lock member that is detachably provided to the seat bag 1 and can fix the seat bag 1 at least at the fourth relative position by engaging with the notch 34a, and the lock plate 36 and the operating lever 11 and a link serving as a connecting means for moving the lock plate 36 from the engagement position to the disengagement position when the operating portion 13 of the operating lever 11 is operated from the first operating position to the third operating position. 41 is provided on the link 41 and absorbs the displacement when the operating portion 13 of the operating lever 11 is operated from the first operating position to the second operating position, and allows the lock plate 36 to be in the engaged position. Link groove 4 as displacement absorbing means for holding
It is characterized by having 2.

The rear tilting and forward tilting can be operated by a common operating lever, and the presence of the lock release lever prevents the seat back from falling backward even if the operating lever is operated unexpectedly.

[Example of idea]

An embodiment of this invention will be described below with reference to the accompanying drawings. In FIG. 1, reference numeral 11 denotes an operating lever, and this operating lever 11 is rotatably supported on a pin 12 serving as a fourth pivot point. An operating portion 13 is provided at the leading end of the operating lever 11, and a guide hole 14 serving as a long hole is provided at the rear end. A lock release lever 15 is rotatably supported on a pin 16 serving as a fifth pivot point provided near the upper end so as to overlap the rear end side of the operating lever 11. An operating section 17 is provided on the lower end side of the lock release lever 15. A cam hole is located between the pin 16 and the operating portion 17, and has an engaging stepped portion 18a as an engaging edge portion, the upper edge of which matches the upper edge of the guide hole 14 of the operating lever 11. 18 are provided. A spring 19 is stretched above the pin 16 of the lock release lever 15 and has one end attached to the rear side of the lock release lever 15 and the other end fixed to the frame.
is configured to always bias counterclockwise. A plate 20 serving as a swinging member is supported on the side of the lock release lever 15 so that its tip side overlaps with the plate 20 so as to be rotatable about a pivot pin 21 serving as a third pivot point. has been done. There is a pin 2 on the tip side of this plate 20.
2 protrudes from the guide hole 14 of the operating lever 11 and the cam hole 18 of the lock release lever 15.
It is removably inserted into the engagement stepped portion 18a of.
Further, a cam 24 having an arcuate portion 23 concentric with a pivot pin 21 serving as a center of rotation of the plate 20 is integrally fixed to the back side of the plate 20. An engagement hole 25 constituting a connecting portion is provided on the rear end side of the plate 20. A pin 26 as a rotation center is provided above the rear end side of this plate 20, and a lock gear 27 as a locking member is rotatable and its lower half is connected to the back side of this plate 20. They are attached so that they overlap closely. A circular arc portion 27a is formed on the cam 24 side of the lock gear 27 and circumscribes the circular arc portion 23 of the cam 24 up to the vicinity of its lower end. Further, a pin 28 protrudes from the lock gear 27 and engages with an engagement hole 25 provided in the plate 20. Also, this lock gear 2
On the opposite side of the circular arc portion 27a of No. 7, a circular arc portion is formed that circumscribes a circular arc portion 29a of a sector gear 29 as a movable member, which will be described later. A gear portion 30 serving as an engaging portion of the lock gear 27 is provided on this arc portion.

The sector gear 29 is fixed to the side wall of the seat back 1, and the rotation shaft 3 serves as a first pivot point.
1, so that the seat bag 1 can be tilted rearward. This sector gear 29 has a seatback raising gear part 32 that meshes with a gear part 30 of the lock gear 27 and constitutes a locking part of the sector gear 29 to hold the seatback 1 in an upright position, and a seatback raising gear part 32 to hold the seatback in a horizontal position. A gear portion 33 for use is provided.

With the above structure, when the lock release lever 15 is biased by the spring 19 and rotates counterclockwise as shown in FIG. 1 and is in the locked position, the pin 22 at the tip of the plate 20 Since it is in contact with the guide hole 14 of the operating lever 11 and the engaging stepped portion 18a of the cam hole 18 of the lock release lever 15, even if you try to pull the operating portion 13 of the operating lever 11 upwards as shown by the arrow, the operating lever 11 will not move. cannot be raised. In this case plate 2
The arc portion 23 of the cam 24 is integrally attached to the
The lower end of the lock gear 27, which is engaged with the seat back erecting gear portion 32 of the sector gear 29, is pressed against the sector gear 29, so that the seat back 1 is held in the erected state.

Next, to tilt the seat bag 1 backward from the upright position, rotate the operating portion 17 of the lock release lever 15 clockwise.
The cam hole 18 moves as shown in FIG. 7, and the pin 22 at the tip of the plate 20 is released from the engaging stepped portion 18a of the cam hole 18, so the operating lever 11 is also released and is moved upward. It becomes possible to raise it.

Next, when the operating lever 11 is pulled upward as shown in FIG.
The cam 24, which is integral with the lock gear 27, rotates in the direction of the arrow and separates from the arc portion 27a of the lock gear 27. At the same time, the pin 28 provided on the lock gear 27
0 along the engagement hole 25, and the lock gear 27
The gear portion 30 of the seat back 1 is disengaged from the seat back raising gear portion 32 of the sector gear 29, and the lock gear 27 is separated from the sector gear 29 as shown by the arrow, so that the seat back 1 can be tilted backward. Also, the pin 2 at the tip of the plate 20
2 moves along the inclined surface of the cam hole 18 of the lock release lever 15, so that the lock release lever 15 returns slightly to its initial locked position.

Next, when the seat back 1 is tilted backward, the sector gear 29 rotates around the rotation shaft 31 as shown in FIG. The gear portion 33 and the gear portion 30 of the lock gear 27 are engaged and locked.

Next, to lower the upper end of the seat back 1 to the floor 5 of the luggage compartment 3, remove the headrest provided at the upper end of the seat back 1, and then follow the same procedure as when folding the seat back 1 backward from the upright position. First, move the lock release lever 15 to the operating section 17.
After rotating the control lever clockwise through the
1 upward via the operating section 13. After the same operation as when tilting the seat backwards, the lock gear 27 and the sector gear 29 are disengaged from the seat back tilting gear part 33, and the sector gear 29 rotates further as shown in FIGS. 10A and 10B. , the upper end of the seat bag 1 contacts the floor surface 5 with the gear portion 30 of the lock gear 27 contacting the arcuate portion 29a of the sector gear 29.

The seat back tilting mechanism has a structure as shown in FIG. 11. In the figure, reference numeral 34 denotes a bracket rotatably provided on the sector gear 29 via a rotation shaft 35, and the seat bag 1 can be tilted forward integrally with this bracket 34. A notch 34a serving as a second locking portion is provided on the front end side of the bracket 34, and is adapted to engage and release a lock plate 36 as a movable locking member. The lock plate 36 is rotatably supported by the sector gear 29 via a pin 37. The lock plate 36 is always held in the notch 34 by the coil spring 38.
It is biased so as to be locked to a. The front end of the spring 38 is fixed above a pin 37 serving as the center of rotation of the lock plate 36, and the rear end is supported by a fixing bracket 39 provided on the back surface of the sector gear 29. Further, a pin 40 is provided protruding from the lower end of the lock plate 36, and this pin 40 serves as a link 4 as a connecting means.
It is slidably engaged with a link groove 42 as a variation absorbing means formed on the rear end side of 1. The tip of the link 41 is connected below the rotation center 12 of the operating lever 11.

Therefore, in order to fold the seat back 1 forward, when the operating lever 11 is rotated counterclockwise via the operating section 13, the link 41 moves toward the rear end as shown by the arrow, and the link groove 42 The tip presses the pin 40 at the lower end of the lock plate 36 against the elasticity of the coil spring 38 and rotates the lock plate 36 counterclockwise as shown by the arrow, so that the lock plate 36 is attached to the bracket 34.
is released from the notch 34a. Therefore, it becomes possible to move the seat bag 1 forward.

[Effect of idea]

As explained above, in this invention, a cam and an engagement hole are provided in a plate that engages through a pin with a guide hole and a cam hole provided in the operation lever and the lock release lever, and the plate is rotatably supported. By rotating the lock release lever, the pin is engaged with and disengaged from the operating lever and the lock release lever, and the lock gear that engages with the sector gear is pressed against the sector gear by a cam, so that backward and forward tilting is avoided. Both can be operated using a common control lever, providing excellent operability. Furthermore, the presence of the lock release lever prevents the seat bag from falling backwards even if the operating lever is operated unexpectedly. In addition to holding the seatback in the upright and rearward position, the sector gear also allows the sector gear to pass through the seatback in the rearward position and bring the upper end of the seatback into contact with the floor, making more effective use of the luggage compartment. This also has the effect of allowing heavy objects to be placed on the seat bag.

[Brief explanation of drawings]

Figures 1 to 11 show an embodiment of this invention, with Figure 1 being a side view showing the seat bag locked in the upright position, and Figures 2 to 6 being plan views showing the component parts. Figure 2 shows the operating lever, Figure 3 shows the lock release lever, Figure 4 shows the plate, Figure 5 shows the lock gear, Figure 6 shows the sector gear, and Figures 7 to 10 A and B show the FIG. 11 is a side view for explaining the operation when the seat back is folded back, FIG. 11 is a side view for explaining the operation when the seat back is folded forward, FIG. 12 is a perspective view showing a conventional rear seat reclining device, and FIG. 13 is the same. FIG. 14 is a side view showing the conventional rear seat tilted forward, and FIG. 14 is a side view showing the conventional rear seat horizontally. 11... Operating lever, 13... Operating unit, 14...
...Guide hole, 15...Lock release lever, 17...
Operation part, 18...cam hole, 18a...engaging step part,
20... Plate, 22... Pin, 24... Cam, 25... Engagement hole, 27... Lock gear, 29
. . . Sector gear, 32 . . . Gear section for raising the seat back, 33 . . . Gear section for lowering the seat back.

Claims (1)

[Claims for Utility Model Registration] A movable member that is pivotally supported via a first pivot point and can swing between a first relative position and a second relative position with respect to the rear end of the seat cushion; The movable member is pivoted at a second pivot point different from the pivot point, and is pivotable to the movable member between a third relative position and a fourth relative position, and a first relative position of the movable member. When the movable member is in the second relative position, the movable member is in the forward leaning position and the fourth relative position is the upright position, and the movable member is in the second relative position. a seat back that is in a rearward tilting position when the seat is in a tilted position; A locking member is movable between an engagement position where it engages with the locking portion and a disengagement position where the engaging portion separates from the locking portion, and a connecting portion that connects to the locking member is formed at one end. a rocking member that is swingably supported at a third pivot point and moves the locking member as the rocking member swings; a pin provided at the other end of the rocking member; a fourth pivot point; An operating section and an elongated hole extending circumferentially around the fourth pivot point into which the pin is inserted are formed, and the operating section moves from the first operating position to the second operating position. , the pin is located at one end of the elongated hole, and the locking member is moved from the engagement position to the disengagement position via the pin, and the operating section is moved from the first operating position to the first operating position. an operating lever that allows the pin to move toward the other end within the elongated hole when moving to a third operating position on the opposite side of the second operating position; and an axis of the third pivot point and the a lock release lever that is pivotally supported at a fifth pivot point located away from a plane containing the pin, is capable of swinging between a lock position and an unlock position, and is formed with a cam hole into which the pin is inserted; A first part that forms a part of the cam hole, extends in the circumferential direction around the fifth pivot point, and engages with the pin when the locking member is in the engagement position.
a cam hole, an engaging edge forming a side edge of the first cam hole and engaging with the pin to restrict the swinging of the swinging member when the lock release lever is in the lock position; The first cam hole forms a part of the cam hole and is connected to a portion of the first cam hole where the pin is located when the lock release lever is in the lock release position, so that the operating portion of the operating lever is connected to the first cam hole. a second cam hole through which the pin can pass when moving from the operating position to the second operating position; a movable lock member capable of fixing the seat bag at least at the fourth relative position by engaging with the movable lock member, the movable lock member being provided between the movable lock member and the operating lever, the operating portion of the operating lever being in the first operating position; a coupling means for moving the movable lock member from the engagement position to the disengagement position when the movable lock member is operated from the first operating position to the second operating position; A rear seat reclining device comprising a displacement absorbing means for absorbing displacement when the movable lock member is operated to the operating position and holding the movable lock member at the engagement position.