Seat back table

Abstract

To improve usability.SOLUTION: A seat back table 10 comprises: a base member 20 having a mounting part 21 mounted on a vehicle seat and a connection part 22 positioned on a posterior of a seat back constituting the seat; a support member 30 having a base end part 31 rotatably connected to the connection part 22 around an axis line C extending in a width direction X of the seat back; a top plate 40 supported by the support member 30; and a change mechanism 50 provided between the connection part 22 and the base end part 31, and configured such that a rotating angle of the support member 30 to the base member 20 can be changed.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a seat back table. [Background technology]

[0002] Patent Document 1 discloses a seatback table equipped with a table (hereinafter, referred to as a top plate) supported so as to be tiltable on the rear surface of a seatback constituting a front seat of a vehicle. The top plate is configured so as to be tiltable between a stored state along the rear surface of the seatback and a usage state in which the top plate stands up against the rear surface of the seatback. A passenger in the rear seat uses the top plate by changing the top plate from the stored state to the usage state.

[0003] Conventionally, there are seat back tables that can be retrofitted to the front seats of a vehicle. 5(a), such an add-on type seatback table 110 includes a base member 120 attached to the rear surface of the seatback 92 of the seat 90, and a top plate 140 supported by the base member 120. In many add-on type seatback tables 110, the tilt angle of the top plate 140 relative to the base member 120 cannot be changed when in use.

[0004] Another type of retrofit seatback table includes a base member attached to the rear surface of the seatback, a top plate supported so as to be tiltable relative to the base member, and a pair of strings that regulate the angle of the top plate relative to the base member when in use. The pair of strings are provided at both ends of the width of the top plate, and connect the rear end of the top plate to a portion of the base member that is located above the base end of the top plate. In such a seatback table, the tilt angle of the top plate relative to the base plate can be changed by changing the length of the pair of strings. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2017-109717 A Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, in the former seat back table 110 among the retrofit type seat back tables, the tilt angle of the top plate 140 relative to the base member 120 cannot be changed. Therefore, as shown in Fig. 5(b), when the seat back 92 is reclined from the position shown in Fig. 5(a), the top plate 140 is tilted relative to the horizontal plane so that the rear side is positioned lower.

[0007] In the latter retrofit type seat back table, when changing the inclination angle of the tabletop relative to the base member, it is necessary to change the length of the pair of string parts so that they are the same. Also, since the pair of string parts are located at both ends of the tabletop in the width direction, the space above the tabletop is restricted by the string parts.

[0008] For these reasons, there is room for improvement in terms of usability. [Means for solving the problem]

[0009] Various aspects of the seat back table for solving the above problems will be described below. [Aspect 1] A base member having an attachment portion to be attached to a vehicle seat and a connecting portion located on a rear side of a seat back constituting the seat; a support member having a base end connected to the connecting portion so as to be rotatable about an axis extending in a width direction of the seat back; A top plate supported by the support member; A change mechanism is provided between the connecting portion and the base end portion and configured to change the rotation angle of the support member relative to the base member. Seat back table.

[0010] According to this configuration, the rotation angle of the tabletop relative to the seat back can be changed by changing the rotation angle of the support member relative to the base member using the change mechanism. This makes it possible to prevent the tabletop from tilting relative to the horizontal plane due to the reclining angle of the seat back. In addition, since the change mechanism is provided between the connecting portion of the base member and the base end portion of the support member, the space above the tabletop is not restricted by the change mechanism. Therefore, usability can be improved.

[0011] [Aspect 2] The change mechanism is configured to allow the support member to rotate toward an upper portion of the seat back, while restricting the support member from rotating toward a lower portion of the seat back. 2. The seat back table according to claim 1.

[0012] According to this configuration, the rotation angle of the top plate relative to the seat back can be easily changed by a simple operation such as lifting the top plate. Also, according to the above configuration, when a downward load acts on the top plate, the rotation of the support member is restricted. This makes it possible to prevent the top plate from rotating due to the load that the changing mechanism receives from an object placed on the top plate.

[0013] [Aspect 3] The change mechanism is a ratchet mechanism configured to change the rotation angle of the support member relative to the base member by a predetermined angle within a predetermined angle range. The seat back table according to aspect 2.

[0014] According to this configuration, the rotation angle of the top plate relative to the seat back can be finely adjusted, which further improves usability. Also, the change mechanism can be easily realized by using a ratchet mechanism, which is a well-known configuration.

[0015] [Aspect 4] The mounting portion is disposed at an interval from each other in the width direction and has a pair of insertion holes through which a pair of legs of a headrest constituting the seat are inserted. The seat back table according to any one of the first to third aspects.

[0016] According to this configuration, the mounting portion is attached to the seat by inserting the pair of legs of the headrest into a pair of insertion holes of the mounting portion and then inserting the pair of legs into a pair of holes opening in the upper end surface of the seat back. Therefore, the seat back table can be easily attached to a seat equipped with a headrest having a pair of legs and configured to be detachable from the seat back.

[0017] [Aspect 5] The base member has a pair of the connecting portions spaced apart from each other in the width direction, The support member has a pair of the base ends rotatably connected to a pair of the connecting portions, A pair of the change mechanisms are provided between the pair of the connecting portions and the pair of the base end portions, respectively. The seat back table according to embodiment 4.

[0018] According to this configuration, the pair of base ends of the support member are connected to the pair of connecting portions spaced apart from each other in the width direction, thereby making it possible to stably support the support member, and therefore the tabletop. Effect of the Invention

[0019] The seatback table according to the present invention can improve usability. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a perspective view of an embodiment of a seat back table. [Diagram 2] FIG. 2 is a side view of the seatback table of FIG. [Diagram 3] FIG. 3 is a side view showing a method of attaching the seat back table to the seat. [Figure 4]4(a) and 4(b) are side views of the seat back table and the seat in FIG. [Diagram 5] 5(a) and 5(b) are side views of a conventional retrofit type seat back table and a seat. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, a specific embodiment of a seat back table will be described with reference to Figs. 1 to 4. As shown in FIGS. 1 and 2, the seatback table 10 includes a base member 20, a support member 30, a top plate 40, and a changing mechanism 50.

[0022] In the following, the width direction of the seat back 92 (see Figure 3) of the seat 90 to which the seat back table 10 is applied will be referred to simply as the width direction X, the front-to-back direction will be referred to simply as the front-to-back direction Y, and the up-down direction of the seat back 92 will be referred to simply as the up-down direction Z.

[0023] Next, each component will be described. <Base member 20> As shown in FIGS. 1 to 3, the seat 90 includes an attachment portion 21 that is attached to a vehicle seat 90 and a connecting portion 22 that is located on the rear side of a seat back 92 that constitutes the seat 90.

[0024] The mounting portion 21 extends in the width direction X. The mounting portion 21 is provided with a pair of insertion holes 23 arranged at an interval from each other in the width direction X. The pair of insertion holes 23 penetrate the mounting portion 21 in the up-down direction Z.

[0025] One end of a first connecting member 24 is connected to each end of the mounting portion 21. The first connecting member 24 extends outward in the width direction X from the end of the mounting portion 21, bends rearward at the outer end, and further bends downward at the rear end.

[0026] A vertical frame 25 extending in the up-down direction Z is connected to the lower end of each of the first connecting members 24. A second connecting member 26 is connected to the lower end of each vertical frame 25. The second connecting member 26 extends downward from the lower end of the vertical frame 25, and is bent at its lower end to extend inward in the width direction.

[0027] A horizontal frame 27 extending in the width direction X is connected between the second connecting members 26. A coupling portion 22 extending in the front-rear direction Y is coupled to a lower end of the second connecting member 26. The coupling portion 22 protrudes forward and rearward from the second connecting member 26. In this embodiment, a pair of coupling portions 22 are provided in the width direction X with a gap therebetween.

[0028] <Support member 30> 1, a pair of base ends 31 of a substantially U-shaped support member 30 are rotatably connected to the pair of connecting portions 22. The support member 30 is rotatably connected to the connecting portions 22 around an axis C extending in the width direction X.

[0029] <Tabletop 40> 1, the top plate 40 is a substantially rectangular plate. The top plate 40 is supported from the back side of the top plate 40 by a support member 30. In this embodiment, a pair of mounting plates 41 are attached to the support member 30. The pair of mounting plates 41 are fastened to the back side of the top plate 40, so that the top plate 40 is fixed to the support member 30 via the mounting plates 41.

[0030] <Change mechanism 50> 1 and 2, the change mechanism 50 is provided between the connecting portion 22 and the base end portion 31, and is configured to be able to change the rotation angle α of the support member 30 relative to the base member 20. In this embodiment, a pair of change mechanisms 50 are provided between the pair of connecting portions 22 and the pair of base ends 31, respectively.

[0031] The change mechanism 50 is configured to allow the support member 30 to rotate toward the upper part of the seat back 92 (counterclockwise direction in Figure 2), while restricting the support member 30 from rotating toward the lower part of the seat back 92 (clockwise direction in Figure 2).

[0032] The change mechanism 50 of this embodiment is a ratchet mechanism that can change the rotation angle α of the support member 30 relative to the base member 20 by a predetermined angle β within a predetermined angle range γ. In addition, since the ratchet mechanism is a well-known mechanism described in, for example, JP-A-2009-189391, a detailed description thereof will be omitted.

[0033] 2, when the support member 30 is at the 6 o'clock position, the rotation angle α of the support member 30 with respect to the base member 20 is set to 0 degrees. In this embodiment, the minimum value of the angle range γ is set to 0 degrees, for example, and the maximum value is set to 150 degrees. In this embodiment, the predetermined angle β is set to 5 degrees, for example. In this case, the change mechanism 50 changes the rotation angle α in 31 steps from 0 degrees to 150 degrees.

[0034] The change mechanism 50 is configured such that, when the rotation angle α is made greater than 150 degrees, the change mechanism 50 releases the restriction on the rotation of the support member 30 toward the lower part of the seat back 92 (clockwise direction in Figure 2) and allows the support member 30 to rotate until the rotation angle α becomes 0 degrees.

[0035] <Holding mechanism 60> 1, an upper end of an adhesion part 29 extending in the vertical direction Z is connected to the lower surface of one of the connecting parts 22 via a third connecting member 28. The adhesion part 29 has a frame 29a extending in the vertical direction Z and a magnet 29b attached to the rear surface of the frame 29a.

[0036] An attracted portion 39 that is magnetically attracted to the magnet 29b when the rotation angle α becomes 0 degrees is attached to the support member 30. The attracted portion 39 is made of, for example, stainless steel.

[0037] The adsorbing portion 29 and the adsorbed portion 39 constitute a holding mechanism 60 that holds the top plate 40 in a stowed position along the rear surface of the seat back 92 . Next, a method of attaching the seat back table 10 to the seat 90 will be described with reference to FIG.

[0038] As shown in FIG. 3, first, the headrest 93 is removed from the seat back 92. Next, the pair of legs 94 of the headrest 93 are inserted into the pair of insertion holes 23 of the attachment portion 21 .

[0039] In this state, the pair of legs 94 are inserted into a pair of holes (not shown) opening in the upper end surface of the seat back 92 and attached. In this manner, the attachment portion 21 is attached to the sheet 90 (this is operation A).

[0040] Next, the operation of this embodiment will be described. 4(a) and 4(b), the change mechanism 50 changes the rotation angle α of the support member 30 relative to the base member 20, thereby changing the rotation angle α of the tabletop 40 relative to the seat back 92. This makes it possible to prevent the tabletop 40 from tilting relative to the horizontal plane due to the reclining angle of the seat back 92. In addition, since the change mechanism 50 is provided between the connecting portion 22 of the base member 20 and the base end portion 31 of the support member 30, the space above the tabletop 40 is not restricted by the change mechanism 50.

[0041] Next, the effects of this embodiment will be described. (1) The seatback table 10 includes a base member 20 having an attachment portion 21 and a connecting portion 22, a support member 30, a top plate 40, and a changing mechanism 50.

[0042] According to this configuration, the above-mentioned effect B is achieved, and the usability can be improved. (2) The change mechanism 50 is configured to allow the support member 30 to rotate toward the upper part of the seat back 92, while restricting the support member 30 from rotating toward the lower part of the seat back 92.

[0043] According to this configuration, the angle of the top plate 40 relative to the seat back 92 can be easily changed by a simple operation such as lifting the top plate 40. In particular, the support member 30 is allowed to rotate toward the side approaching the upper part of the seat back 92, that is, toward the side opposite to the side to which the seat back 92 is reclined. Therefore, as shown in FIG. 4(b), even if the seat back 92 is reclined from the position shown in FIG. 4(a), the position of the top plate 40 can be kept horizontal by rotating the top plate 40. Furthermore, according to the above configuration, when a downward load acts on the top plate 40, the rotation of the support member 30 is restricted. This makes it possible to suppress the top plate 40 from rotating due to the load that the change mechanism 50 receives from an object placed on the top plate 40.

[0044] (3) The change mechanism 50 is a ratchet mechanism configured to be able to change the rotation angle α of the support member 30 relative to the base member 20 by a predetermined angle β within a predetermined angle range γ. According to this configuration, usability can be further improved since the rotation angle α of the top plate 40 relative to the seat back 92 can be finely adjusted. Also, the change mechanism 50 can be easily realized by a ratchet mechanism, which is a well-known configuration.

[0045] (4) The attachment portion 21 is disposed at an interval in the width direction X and has a pair of insertion holes 23 through which a pair of legs 94 of a headrest 93 constituting the seat 90 are inserted. With this configuration, in order to achieve the above-mentioned function A, the seatback table 10 can be easily attached to a seat 90 having a pair of legs 94 and a headrest 93 configured to be detachable from a seat back 92.

[0046] (5) The base member 20 has a pair of connecting portions 22 spaced apart from each other in the width direction X. The support member 30 has a pair of base ends 31 rotatably connected to the pair of connecting portions 22. A pair of changing mechanisms 50 are provided between the pair of connecting portions 22 and the pair of base ends 31, respectively.

[0047] According to this configuration, a pair of base ends 31 of the support member 30 are connected to a pair of connecting portions 22 provided at an interval from each other in the width direction X. This makes it possible to stably support the support member 30, and therefore the top plate 40.

[0048] (6) The seatback table 10 includes a retaining mechanism 60 that maintains the top plate 40 in a stowed position along the rear surface of the seatback 92 . With this configuration, it is possible to prevent the top plate 40 and the support member 30 in the stored position from vibrating when the vehicle is traveling.

[0049] <Modification> This embodiment can be modified as follows: This embodiment and the following modifications can be combined with each other to the extent that there is no technical contradiction.

[0050] The predetermined angle range γ can be greater than or less than 150 degrees, and the predetermined angle β can be greater than or less than 5 degrees.

[0051] The shape of the base member 20 is not limited to that exemplified in the above embodiment and may be modified as appropriate. For example, the base member 20 may have only one connecting portion 22. The attachment portion 21 is not limited to having the insertion hole 23 through which the leg portion 94 of the headrest 93 is inserted. The attachment portion may have, for example, a hook shape that is hooked onto the leg portion 94. In short, the attachment portion 21 may have any shape as long as it is attached to the seat 90, and the shape of the attachment portion 21 may be changed as appropriate.

[0052] The change mechanism 50 is not limited to a ratchet mechanism. For example, the change mechanism may be realized by a one-way clutch or the like. Even in this case, the same effect as effect (2) of the above embodiment can be achieved.

[0053] The change mechanism 50 may allow the support member 30 to rotate relative to the base member 20 by loosening a screw provided between the connecting portion 22 of the base member 20 and the base end portion 31 of the support member 30. In this case, the rotation of the support member 30 relative to the base member 20 is restricted by tightening the screw. [Explanation of symbols]

[0054] 10,110…Seat back table 20,120…Base material 21…Mounting part 22...Connection part 23...Through hole 24...First connecting member 25…Vertical frame 26...Second connecting member 27…Horizontal frame 28...Third connecting member 29...Adsorption part 29a…Frame 29b…Magnet 30...Support member 31...Proximal end 39...Attracted part 40,140…Tabletop 41...Mounting plate 50…Change mechanism 60...holding mechanism 90…sheets 91…Seat cushion 92…Seat back 93…Headrest 94...legs

Claims

1. A base member having an attachment portion to be attached to a vehicle seat and a connecting portion located on a rear side of a seat back constituting the seat; a support member having a base end connected to the connecting portion so as to be rotatable about an axis extending in a width direction of the seat back; A top plate supported by the support member; A change mechanism is provided between the connecting portion and the base end portion and configured to change the rotation angle of the support member relative to the base member. Seat back table.

2. The change mechanism is configured to allow the support member to rotate toward an upper portion of the seat back, while restricting the support member from rotating toward a lower portion of the seat back. The seat back table according to claim 1.

3. The change mechanism is a ratchet mechanism configured to change the rotation angle of the support member relative to the base member by a predetermined angle within a predetermined angle range. The seat back table according to claim 2.

4. The mounting portion is disposed at an interval from each other in the width direction and has a pair of insertion holes through which a pair of legs of a headrest constituting the seat are inserted. The seat back table according to any one of claims 1 to 3.

5. The base member has a pair of the connecting portions spaced apart from each other in the width direction, The support member has a pair of the base ends rotatably connected to a pair of the connecting portions, A pair of the change mechanisms are provided between the pair of the connecting portions and the pair of the base end portions, respectively.

5. The seat back table according to claim 4.

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