JP2547446Y2 - Bending structure of seat back in reclining seat - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a seat back in a reclining seat, and in particular, folding of a seat back of a reclining seat such as a bus or a train having no operation space on a side of the back seat. It is related to the music structure.

(Conventional technology) In reclining seats used in buses and trains, to effectively use a narrow cabin, the positions of each other excluding aisles are packed as much as possible and as close to windows as possible. Must be placed in state.

Also, when the reclining seat is reclined with respect to the seat, if the upper portion is slightly lifted, the user can use it in a comfortable state, so that the upper portion can be bent slightly forward when reclining. It is convenient to do so. That is, for a person using the reclining seat, for example, when the user wants to read a newspaper or the like with the upper body down, there is a case where the user wants to raise the head even if the upper body is down.

As such a reclining seat, for example,
As disclosed in Japanese Patent Publication No. Sho 63-13853, such as "a reclining device for an automobile seat", a tiltable seat back is divided into two upper and lower portions with respect to a seat bottom attached to the vehicle body side. Various types with a reclining device have been proposed. The "reclining device" disclosed in Japanese Patent Publication No. 63-13853 is described as follows. "The second reclining device 8 is fixed to the lower seat back 7 as described in the third column, line 37 et seq. Bracket 15 and upper seat back 9
Is pivotally connected to a bracket 16 fixed to the upper seat back via a pivot 17 so that the bracket 16 is swung by operating an adjustment lever 18 so that the inclination angle of the upper seat back 9 can be adjusted. " However, in particular, the "adjustment lever 18" is the "upper seat back 9" and "lower seat back 7"
It protrudes greatly forward at the boundary portion with. As described above, if the "adjustment lever 18" protrudes forward between the seat backs, the operation itself is extremely difficult, and the "adjustment lever 18"
It can be very disturbing when a user moves between reclining seats adjacent to each other. The above description is based on the "knob part" in the "structure of an automobile seat back" proposed in Japanese Utility Model Publication No. 63-42855.
26 ".

That is, in the reclining seats that have already been proposed, no consideration is given to adopting this in a vehicle having a limited interior space such as a bus or a train, and in particular, there is nothing on the side of the reclining seat. There is a demand for a folding seat back that can be applied to vehicles such as buses and trains that one does not want to attach.

Therefore, the present inventors have conducted intensive research on how to provide a folding seatback applicable to vehicles such as buses and trains with a simple structure, and as a result, completed the present invention. .

(Problems to be solved by the present invention) The present invention has been made based on the above background, and the problems to be solved are to improve the operability of the folding seat back in the reclining seat and to improve the seat back. The removal of protrusions in itself.

The purpose of the present invention is to perform the operation without hindering the user of the adjacent reclining seat, and to reliably perform reclining of the seat back in a narrow space. Another object of the present invention is to provide a foldable seat back with a simple structure that can effectively install the seat back in a narrow space.

(Means for Solving the Problems) In order to solve the above problems, the means adopted by the present invention will be described with reference numerals used in the embodiments. Seat back frame (2
The upper seat back (20B) is moved forward with respect to the lower seat back (20A) by rotatably connecting the lower end of the seat back frame (21b) constituting the upper seat back (20B) to the upper end of 1a). In the reclining seat (100) with the foldable seat back (20), the storage section (2) provided on the side of the lower seat back (20A)
3) Inside the side plate (1) of the reclining seat (100)
A driving device (24) operated by an operating device (30) provided in 3) to extend and retract the operating rod (24a), and a long hole (25a) for guiding the tip of the operating rod (24a) within a predetermined range.
And a connecting rod (26) rotatably connected to the tip of the operating rod (24a) and having one end extending to the lower end of the seat frame (21b) of the upper seat back (20B). ), And one end of this connecting rod (26) is rotatably connected to the tip of a connecting arm (27) formed to protrude forward at the lower end of the upper seat back frame (21b). The bent structure (100) of the seat back (20) is characterized in that:

That is, the reclining seat (10
In (0), the lower seat back (20A) and the upper seat back (20B), which are formed by dividing the seat back (20) into two parts, are made freely bendable and provided on the side of the lower seat back (20A). A driving device (24) that expands and contracts the operating rod (24a) and a slot (2) that guides the tip of the operating rod (24a) within a predetermined range are provided in the storage portion (23).
5a) and a connecting rod (24a) rotatably connected to the tip of the operating rod (24a) and having one end extending to the lower end of the seat frame (21b) of the upper seat back (20B). 26) are stored and arranged so that nothing protrudes around the seat back (20). In the reclining seat (100), the driving device (24) housed in the housing portion (23) on the lower seat back (20A) side is connected to an operating cable (28).
The operating rod (24a) of this driving device (24) is stored by being operated via a driving device (24) such as an operating lever provided on the armrest (12) of the reclining seat (100) connected to the reclining seat (100). The upper seat back (20B) is bent with respect to the lower seat back (20A) by expanding and contracting in the section (23).

(Mode of operation and use of the invention) Reclining seat (100) configured as described above
The operation of the seat back (20) according to the present invention will be described together with its mode of use.

First, when the user wants to recline the entire seat back (20) of the reclining seat (100), he operates one operating device (30) provided in the recess (14) of the side plate (13). Thus, the seat back driving device (40) is driven. When the seat back driving device (40) is driven, the seat back frame (21a) on the lower seat back (20A) side is rotated with respect to the seat frame (11), so that as in a general reclining seat, The lower seat back (20A) reclining seat is made. Of course, since the seat back (20) is configured by connecting the lower seat back (20A) and the upper seat back (20B), the lower seat back (20) is formed.
If A) is reclined, the upper seat back (20B) is also reclined.

Here, when the user wants to read a newspaper or the like on the reclined seat back (20), the upper seat back (20B) is raised slightly forward with respect to the lower seat back (20A). The operation is performed by operating another operating device (30) provided in the recess (14) of the side plate (13) to drive the driving device (24) provided in the storage portion (23) of the lower seat back (20A). ) Is driven. Drive (2
When 4) is driven, as shown in FIG. 3, the operating rod (24a) of the driving device (24) extends and its tip is guided in the elongated hole (25a) of the support member (25). It moves downward in the figure. Since the connecting rod (26) is connected to the tip of the operating rod (24a), the upper seat back (20B) is tilted forward via the connecting rod (26). One end of the connecting rod (26) is connected to the seat back frame (2
This is because it is connected to the connection arm (27) provided integrally with 1b). In addition, this upper seat back (20B)
The inclination angle of the upper seat back (20A) with respect to the lower seat back (20A) may be determined by the user arbitrarily determining the drive stop timing of the drive device (24). When the operation by the operation device (30) is stopped, the upper seat back ( Since the tilting operation of the lower seat back (20A) with respect to the lower seat back (20A) stops, the tilt angle of the upper seat back (20B) with respect to the lower seat back (20A) can be set to an arbitrary state.

Of course, when the upper seat back (20B) inclined with respect to the lower seat back (20A) is to be returned to the original state, the operation described above may be performed in reverse, and a motor or the like may be used as the driving device (24). If the drive source is adopted, perform the operation of reversing the rotation direction. If the drive device (24) contains a compression spring or pressurized fluid, use it. It is only necessary for the person to put back force on the upper seat back (20B) and return.

In any of the above cases, only the inclination of the seat back (20) itself and the inclination of the upper seat back (20B) with respect to the lower seat back (20A) are changed, and there is no surrounding around the seat back (20). The reclining seat (100) can be arranged close to the window side of the vehicle, as a matter of course, since there is no protrusion of the reclining seat (100). It is. Therefore, the reclining seat (100) is sufficiently suitable to be used in vehicles having a limited interior space such as buses and trains.

(Embodiment) Next, the seat back (20) according to the present invention of the reclining seat (100) will be described in detail according to the embodiment shown in the drawings.

FIG. 1 shows a side view of a reclining seat (100) employing a seat back (20) according to the present invention. The reclining seat (100) is a seat (1).
0) reclining lower seat back (2
0A), the lower end of the upper seat back (20B) is rotatably connected to the upper end of the seat back frame (21a) of the upper seat back (20B). It has a seat back (20) that can be bent forward with respect to the back (20A).

That is, in the reclining seat (100), the seat back frame (21a) constituting the lower seat back (20A) is rotatably supported by a part of the seat frame (11) supporting the seat (10). One end of the seat back driving device (40) connected to the lower end of the seat back frame (21a) is connected to the seat frame (11) side, and the seat back driving device (4
The lower seat back (20A) is reclined by the operation of (0). A substantially horizontal connecting shaft (22) is supported on the upper end side of the seat back frame (21a) of the lower seat back (20A). The connecting shaft (22) supports the upper seat back (20B).
The lower end of the seat back frame (21b) is rotatably connected. This allows the upper seat back (20B) to recline with respect to the lower seat back (20A).

On the side of the lower seat back (20A), as shown in FIG. 3, a storage portion (23) is formed by partially opening a portion constituting the seat back frame (21a). A drive device (24) that is operated by an operation device (30) provided on the armrest (12) of the reclining seat (100) to extend and retract the operation rod (24a), and an operation rod ( A support member (25) having an elongated hole (25a) for guiding the distal end of the upper part 24a) within a predetermined range, and one end of an upper seat back (20B) rotatably connected to the distal end of the operating rod (24a). ) Connecting rod (2) extending to the lower end of the seat frame (21b).
6) are stored and arranged.

The driving device (24) shown in FIGS. 1 and 2 has the same structure as the above-mentioned seat back driving device (40) in this embodiment, and has a compression spring or a pressurized fluid filled therein. The operation rod (24a) is extended by pushing a switch (24b) provided at the upper end in the figure by swinging an operation lever (24c) operated via an operation cable (28). It is configured as follows. As this drive device (24), for example, a combination of a motor and a ball screw can be employed. In this case, the operating rod (24)
Connect the tip of the one corresponding to a) to the connecting arm (27)
It may be implemented by directly connecting to.

The operating rod (24a) of the driving device (24) configured as described above is engaged with the elongated hole (25a) of the support member (25) integrally formed in the storage portion (23), This long hole (25a) is provided in the storage part (2) of the seat back frame (21a).
The direction of expansion and contraction of the operating rod (24a) in 3) is set. Accordingly, the support member (25) and its elongated hole (25a) are necessary even when a combination of a motor and a ball screw is employed as the drive device (24).

A connecting rod (26) extending to the lower end of the seat frame (21b) of the upper seat back (20B) is connected to the operating rod (24a) of the driving device (24). Is rotatably connected to a distal end of a connecting arm (27) projecting forward at the lower end of the upper seat back frame (21b). Thus, when the connecting rod (26) is pulled by the operating rod (24a) of the driving device (24), the seat back frame (2) of the upper seat back (20B)
1b) is rotated forward about a connection shaft (22) connecting the seat back frame (21a) and the seat back frame (21b).

The connecting arm (27) provided on the seat back frame (21b) of the upper seat back (20B) is fixed to the seat frame (11) side so that the seat (10)
An operating device (30) such as an operating lever or switch provided on a side plate (13) located on both sides of the operating cable (28)
Are connected via. As the operation cable (28), the drive of the drive device (24) is operated remotely (at hand), so that a cable corresponding to the configuration of the drive device (24) is employed. Employs a so-called cable. Of course, if a motor is used as the drive device (24), a power line is used as the operation cable (28).

In this embodiment, an operating device (30) for driving the driving device (24) is provided in a recess (14) formed in the side plate (13). 30) is not directly touched by the user.
In addition, the side plate (13) is provided with an armrest (1) for a user using the reclining seat (100).
2) is provided, and this armrest (12) is
It can be rotated with respect to 3).

In this embodiment, as shown in FIGS. 1 to 3, the folding table (50) is provided with a connecting shaft connecting the lower seat back (20A) and the upper seat back (20B). (22) is provided as a common one. This table (50) is used by the user of the other reclining seat (100) located at the rear, is provided on the back side of the seat back (20), and is integrated forward from the connecting shaft (22). It has a vertically extending table arm (51). At the end of this table arm (51) is a link (52)
The lower end of the link (52) is connected to the seat frame (11) supporting the seat (10). As a result, the table arm (51) provided integrally with the table (50) is connected to one side of the seat frame (11) connecting the seat back frame (21a) of the lower seat back (20A) and the link (52). They are positioned parallel to each other and form a parallel link with the seat back frame (21a) and the table arm (51) of the lower seat back (20A).

That is, the table (50) itself is foldable with respect to the seat back (20) and the seat back (20) provided with the table (50).
Even if is reclined, the seat back (20) is always deployed in a horizontal state regardless of the inclination angle of the seat back (20).

(Effects of the Invention) As described above, in the present invention, as illustrated in the above-described embodiment, the storage unit (2) provided on the side of the lower seat back (20A) is used.
3) A driving device (24) operated by an operating device (30) provided on an armrest (12) of the reclining seat (100) to extend and retract the operating rod (24a), and a tip of the operating rod (24a). (25) having an elongated hole (25a) for guiding the rod within a predetermined range, and an operating rod (24a)
And a connecting rod (26) rotatably connected to the end of the connecting rod (26) and extending at one end to the lower end of the seat frame (21b) of the upper seat back (20B). One end is rotatably connected to the tip of a connecting arm (27) protruding forward at the lower end of the upper seat back frame (21b). " The operation can be performed without disturbing the user of the adjacent reclining seat, and the reclining of the seat back can be reliably performed in a narrow space, and the seat back can be maximized in a narrow space. The folding seat back which can be installed effectively can be provided by a simple structure.

[Brief description of the drawings]

FIG. 1 is a side view of a reclining seat employing a seat back according to the present invention, FIG. 2 is a side view of a reclining seat in a state where the seat back is inclined, and FIG. 3 is a diagram showing an upper seat back with respect to a lower seat back. It is a side view of the reclining seat in the state inclined forward. EXPLANATION OF SYMBOLS 100… Reclining seat, 10… Seat, 11…
Seat frame, 13 ... side plate, 14 ... recess, 20 ... seat back, 20A ... lower seat back, 20B ... upper seat back, 21a / 21b ... seat back frame, 22
…… Connection shaft, 23… Storage part, 24 …… Drive device, 24a ……
Operating rod, 25 ... Support member, 25a ... Long hole, 26 ... Connecting rod, 27 ... Connecting arm, 28 ... Operation cable, 30
...... Operation device.

Claims (1)

(57) [Scope of request for utility model registration] An upper seat back is rotatably connected to an upper end of a seat back frame constituting a lower seat back reclining with respect to a seat, the lower end of a seat back frame constituting an upper seat back. A reclining seat including a seat back that can be bent forward with respect to the lower seat back, wherein the reclining seat is operated by an operating device provided on a side plate of the reclining seat in a storage portion provided on a side portion of the lower seat back. A driving device for extending and retracting the rod, a support member having an elongated hole for guiding the tip of the operating rod within a predetermined range, and one end of the upper seat back rotatably connected to the tip of the operating rod. The connecting rod extending to the lower end of the frame is stored and Folding structure of the seat back, characterized in that one end of the rod and pivotally connected to the distal end of the connecting arm projecting formed forward at the lower end of the seat back frame.