Sofa

Abstract

To provide a sofa in which a backrest can be reciprocated between the front and the back of a seat, and a back cushion can be used both as a headrest and as a back cushion.SOLUTION: A backrest exists on the seating face of a seat, the backrest is connected movably to the seating face by a back and front moving device, and the back and front moving device is built in the backrest. In a seating tool, the backrest is moved to the front of the seat because the back and front moving device is rotated forward when moved manually in the same direction, and the backrest can be moved to the back of the seat because the back and front moving device is rotated backward when moved manually in the same direction. The backrest and a back cushion exist on the seating face of the seat, the back cushion can be placed on the backrest to be used as a headrest, and can be used as a support cushion to allow the back of a seating person to be supported by being lowered in front of the backrest.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a sofa. [Background technology]

[0002] There are various types of sofas. One example is a sofa with a headrest attached above the backrest (Patent Document 1).

[0003] The sofa in Patent Document 1 is designed so that the headrest can be raised (standing up) above the backrest or folded down to the front of the backrest. When the headrest is folded down to the front of the backrest, a person can sit with his / her back against the headrest without placing a cushion in front of the backrest. When the headrest is raised up above the backrest, a person can sit with his / her back against the backrest and his / her head against the headrest. This has the advantage that a person can sit in a comfortable position just by folding or raising the headrest.

[0004] In the sofa of Patent Document 1, when a person is seated with his / her back resting against the headrest that is tilted down in front of the backrest, if the headrest is raised up onto the backrest, the gap between the backrest and the back becomes wider, making the person prone to falling backward. In order to prevent the person from falling backward, the person must move toward the backrest (behind the seat) (shift the seating position backward) or insert a cushion between the backrest and the back. However, it is cumbersome to shift the seating position backward or insert a cushion every time the headrest is raised up onto the backrest. Inserting a cushion also requires a cushion.

[0005] In order to fold the headrest forward while leaning your back against the backrest and your head against the headrest, you must move forward in the seat (shift your seating position forward) to create enough space between the backrest and your back for the headrest to fit in. However, it is also a hassle to shift your seating position forward every time you fold down the headrest. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2019-170694 A Summary of the Invention [Problem to be solved by the invention]

[0007] To solve the problem of the present invention by making it possible to move a backrest forward and backward on a seat surface, and by enabling a seated person to rest his / her back against the backrest even if the back cushion is raised above the backrest, thereby eliminating the trouble of inserting a cushion between the backrest and the back or the seated person shifting his / her seating position backward. [Means for solving the problem]

[0008] The sofa of the present invention has a backrest on the seat, and a front-rear moving device inside the backrest, and when the backrest is moved forward or backward manually or electrically, the front-rear moving device moves in the same way as the backrest, so that the backrest can move forward and backward on the seat. The front-rear moving device is also built into the backrest so that it cannot be seen from the outside.

[0009] The sofa of the present invention is provided with a back cushion in addition to a backrest, and the back cushion can be placed on the backrest or lowered in front of the backrest, and can be used as a headrest when placed on the backrest and as a support cushion that can support the back of a seated person when lowered in front of the backrest.

[0010] The sofa of the present invention has a support member provided on the backrest and on the rear side of the back cushion, and the support member is connected to the rear side of the back cushion so that when the back cushion is placed on the backrest, the support member is pushed by the back cushion to stand up on the backrest, and when the back cushion is lowered in front of the backrest, the support member is pulled by the back cushion to collapse onto the backrest. Effect of the Invention

[0011] The sofa of the present invention has the following effects. (1) The backrest can be moved forward and backward on the sofa seat to adjust the distance between the backrest and the back of the person sitting, eliminating the need for a seated person to shift their seating position forward or backward, or the need to prepare a separate cushion to put between the backrest and the back of the person sitting, or the hassle of removing and inserting a cushion. (2) The back cushion can be used as a headrest by placing it on top of the backrest, or as a support cushion by lowering it in front of the backrest, so the sofa can be used in different ways to allow the person sitting on it to take a comfortable position. (3) Since the support member rises above the backrest on the rear side of the back cushion, the back cushion can be supported by the support member. In addition, there is no need to prepare a separate support for supporting the back cushion. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view showing an example of a sofa of the present invention. [Diagram 2] FIG. 2 is an explanatory diagram of the back cushion and support member of the sofa of the present invention. [Diagram 3] 4(a) to (c) are explanatory diagrams of raising and lowering the backrest of the sofa of the present invention, and (d) is an explanatory diagram of the state in which the backrest has moved forward. [Figure 4] FIG. 13 is an explanatory diagram of the installation of the forward / backward movement device used in the sofa of the present invention, illustrating the case where the backrest is located behind the seat. [Diagram 5] 13 is an explanatory diagram for explaining the installation of the forward / backward movement device used in the sofa of the present invention, showing the case where the backrest is moved forward of the seat surface. FIG. [Figure 6] 1A is an explanatory diagram of a front-to-rear moving device used in the sofa of the present invention, where (a) is an explanatory diagram of the movable bracket of the front-to-rear moving device when facing forward, (b) is an explanatory diagram of the movable bracket when facing upward, and (c) is an explanatory diagram of the movable bracket when facing backward. [Figure 7] FIG. 2 is an explanatory diagram of the sofa of the present invention in a state where the support member is in a vertical position. [Figure 8]5(a) to (c) are explanatory diagrams of the operation of the back cushion of the sofa of the present invention. [Figure 9] 6(a) to 6(c) are explanatory views of the operation of another back cushion in the sofa of the present invention. [Figure 10] 4(a) to (c) are explanatory diagrams of the operation of different back cushions in the sofa of the present invention. [Figure 11] In the case where the sofa of the present invention is a two-seater sofa, (a) is an oblique view of the state in which the back cushion is lowered in front of the backrest, (b) is an oblique view of the state in which the back cushion is placed on top of the backrest, and (c) is an explanatory diagram of the connection between the back cushion and the support material. [Figure 12] FIG. 1(a) is a perspective view of the sofa of the present invention when it is a three-seater sofa, with the back cushion lowered in front of the backrest, and FIG. 1(b) is a perspective view of the back cushion placed on top of the backrest. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] (Embodiment 1) An example of an embodiment of the sofa of the present invention will be described with reference to the drawings. The sofa of the present invention may have any shape, size, etc. As an example, the sofa shown in Figs. 1 to 10 does not show sleeves, legs, etc. The sofa of the present invention may be either a one-seater sofa or a two-seater or more-seater sofa. As an example, Figs. 11(a) and (b) show a two-seater sofa, and Figs. 12(a) and (b) show a three-seater sofa.

[0014] The sofa in Fig. 1 has a backrest 3, a back cushion 4, and a support material 5 on the upper surface (seat surface) 2 of a seat 1. The backrest 3, back cushion 4, and support material 5 have urethane or other cushioning materials built inside the outer surface materials such as genuine leather, synthetic leather, or cloth. The backrest 3 in Fig. 1 is rectangular, and the back cushion 4 is as long and horizontally long as the backrest 3, but is thinner than the backrest 3. The support material 5 is as long and horizontally long as the back cushion 4, but is thinner than the back cushion 4. As shown in Fig. 2, the upper part 5a of the support material 5 is connected to the back surface of the back cushion 4.

[0015] [Backrest movement] The backrest 3 can move forward from a rear position (FIG. 3(c)) of the seat surface 2 of the seat 1 to a forward position (FIG. 3(d)), and can move backward (return) from the forward position (FIG. 3(d)) to the rear position (FIG. 3(c)). Movement from the rear position in FIG. 3(c) to the forward position in FIG. 3(d) can be performed manually or automatically by an electric motor. When performed manually, for example, a person sitting on the seat 1 can put both arms behind their back and pull the backrest 3 forward (move it forward). Movement from the forward position in FIG. 3(d) to the rear position in FIG. 3(c) can be performed by a person sitting on the seat 1 putting both arms behind their back and pushing the backrest 3 backward (move it backward).

[0016] [Back cushion movement] The back cushion 4 can be placed on top of the backrest 3 or placed in front of the backrest 3 as shown in Figs. 3(a) to (c). do. To place the back cushion 4 on the backrest 3, the person sitting on the seat 1 can reach behind them and push the back cushion 4 upward along the front surface of the backrest 3. To place the back cushion 4 in front of the backrest 3, the person sitting on the seat 1 can reach behind them and pull the back cushion 4 forward along the front surface of the backrest 3. When the back cushion 4 is placed on the backrest 3, it becomes a headrest. and When it is lowered to the front of the backrest 3, it can be used as a support cushion that can support the back of a seated person. The back cushion 4 can also be electrically lowered and raised. In FIG. 2, 4a denotes the bottom surface of the back cushion 4, 4b the front surface, 4c the back surface, and 5b the bottom surface of the support member.

[0017] [Operation of the receiving material] As shown in Fig. 2, the upper part 5a of the support material 5 is connected to the back cushion 4, and when the back cushion 4 is placed on the backrest 3 as shown in Fig. 3(c), it is pushed by the back cushion 4 and stands up on the backrest 3, supporting the back surface of the back cushion 4 (the back cushion 4 can be leaned against it), and when the back cushion 4 is lowered in front of the backrest 3 as shown in Fig. 3(a), it falls forward on the backrest 3 and does not separate from the back cushion 4. In this way, the support material 5 is linked to the operation of the back cushion 4, making it easy to operate.

[0018] [Seat configuration] The seat 1 in FIG. 1 is provided with a rigid seat frame 10 (FIGS. 4 and 5) made of wood, resin, or the like, in the same manner as a general-purpose sofa. The seat frame 10 in FIG. 4 and FIG. 5 includes a rear seat frame 10a that is narrow in depth in the front-rear direction, and a front seat frame 10b that is one step lower than the rear seat frame 10a and is wider in depth in the front-rear direction than the rear seat frame 10a. The outer periphery of the rear seat frame 10a and the front seat frame 10b is covered with urethane or other cushioning material (not shown), in the same manner as a general-purpose sofa, and the outer periphery is covered with a surface material (not shown) such as leather, genuine leather, or cloth. In addition, a mat 11 made of urethane or other cushioning material covered with a surface material is placed on the front seat frame 10b, so that the seat surface 2 of the seat 1 is at the same height (same surface) from the front edge to the rear edge.

[0019] [Backrest configuration] In order to enable the backrest 3 to move from the rear position in Figure 3(c) to the forward position in Figure 3(d), a front-rear movement device 12 (Figure 6) is attached to the rear seat frame 10a of the seat frame 10 as shown in Figures 4 and 5.

[0020] [Configuration and installation of forward / rearward movement device] The fore-aft moving device 12 may be as shown in Fig. 6(a)-(c). The fore-aft moving device 12 in Fig. 6(a)-(c) has two fixed brackets 13 fixed onto the rear seat frame 10a, and a movable bracket 14 is attached to each of the fixed brackets 13 via two arms 15a, 15b. 15a、15b are connected with a bar 16, so that the left and right movable brackets 14 can simultaneously rotate in the direction of arrow AB in Fig. 6(b) to move forward and backward (when rotated in the direction of arrow A, it moves forward, and when rotated in the direction of arrow B, it moves backward). Fig. 6(a) shows the movable bracket 14 rotated in the direction of arrow A (forward tilting state), and Fig. 6(c) shows the movable bracket 14 rotated in the direction of arrow B (backward tilting state). Each fixed bracket 13 is fixed to the rear seat frame 10a with a fixing device such as a screw as shown in Figs. 4 and 5. As shown in Figs. 4 and 5, the fixed bracket 13, movable bracket 14, and arms 15a and 15b are surrounded by a support frame 21 having an outer plate 17a, an inner plate 17b, and a cover plate 23. The bar 16 is positioned inside an elongated opening (cutout) 18 (Figures 4 and 5) at the bottom of the inner plate 17b, and is able to move back and forth within the elongated opening 18 as the movable bracket 14 rotates in the direction of the arrow AB (the provision of the elongated opening 18 ensures that the back and forth movement of the bar 16 is not hindered).

[0021] The front-rear moving device 12 is surrounded by urethane and other cushioning materials arranged on its periphery, and a surface material that covers the periphery, and is built into the backrest 3 as shown in FIG. 3(a) so that it cannot be seen from the outside. By building the front-rear moving device 12 into the backrest 3, there is no need to make a cut in the seat surface 2 to prevent the front-rear moving device 12 from being hindered, and the seat surface 2 is not scratched, looks good, and comfort is not impaired. The front-rear moving device 12 may have a structure other than the above as long as it can exert its action and function, and may, for example, be one that moves horizontally (slides horizontally) forward and backward on the seat 1. The front-rear moving device 12 can also be linked to a driving mechanism such as an actuator so that it can be moved forward and backward electrically. In this way, the backrest 3 moves forward and backward automatically along with the forward and backward movement of the front-rear moving device 12.

[0022] [Configuration of receiving material] The opening and closing device 20 (FIGS. 4, 5, and 7) is used so that the support member 5 can be raised and lowered from the horizontal position shown in FIG. 3(a) to the upright position shown in FIG. 3(c). The opening and closing device 20 has an elongated lower plate 20a and an upper plate 20b connected by a shaft 20c so that they can be opened and closed, and when the upper plate 20b reaches a desired angle, it cannot be opened any further. In FIG. 4, FIG. 5, and FIG. 7, the lower plate 20a of the opening and closing device 20 is fixed to a support frame 21 attached to the rear seat frame 10a, and the upper plate 20b of the opening and closing device 20 is fixed to a flat support plate 22 so that the support plate 22 can be rotated in the direction of the arrow AB in FIG. 4 and FIG. 5. The support member 5 is made by disposing urethane or other cushioning materials on the outer periphery of the opening and closing device 20 and the support plate 22, and wrapping them with a surface material. In this case, a notch 19 (FIG. 7) is provided at the opening and closing location of the upper plate of the cover material so that the upper plate 20b of the opening and closing device 20 wrapped in the cover material can be easily opened and closed back and forth as shown in FIGS. 3(a) to (c). The opening and closing device 20 may have a structure other than that described above as long as it can exert its action and function.

[0023] (Embodiment 2) In the present invention, as shown in Fig. 8, the back cushion 4 can be connected to the backrest 3 with a connector 30 so that the backrest 3 can be raised and lowered. In this case, the backrest 3 is also attached to the seat surface 2 of the seat 1 so that it can move forward and backward as shown in Fig. 1. The connector 30 is built into the backrest 3 and the back cushion 4.

[0024] The connecting structure between the backrest 3 and the back cushion 4 can be any structure. In Fig. 8(a), the back cushion 4 can be tilted forward of the backrest 3 so that it can be used as a support cushion for supporting the back of the seated person, and in Fig. 8(b), the back cushion 4 can be raised above the backrest 3 so that it can be used as a headrest. In this case, even if the lower part of the back cushion 4 is raised above the upper part of the backrest 3 as in Fig. 8(b) and the back cushion 4 is used as a headrest, the connecting device 30 prevents the back cushion 4 from falling backward. Fig. 8(c) shows the state in which the backrest 3 is moved forward of the seat surface 2. The connecting device 30 may have any structure as long as it can exert its action and function.

[0025] (Embodiment 3) In the present invention, as shown in Fig. 9(a), the back cushion 4 can be tilted in front of the backrest 3 so that it can be used as a support cushion, or as shown in Fig. 9(b), the back cushion 4 can be raised above the backrest 3 so that it can be used as a headrest. In this case, a connector 30 is built into the connection between the backrest 3 and the back cushion 4 so that the back cushion 4 does not fall backward when it is raised above the backrest 3 and used as a headrest. The backrest 3 can be moved forward and backward from the seat surface 2 as shown in Fig. 1, and Fig. 9(c) shows the state in which the backrest 3 is moved forward from the seat surface 2.

[0026] (Embodiment 4) In the present invention, as shown in Fig. 10(a), the back cushion 4 can be connected to the top of the backrest 3. In Fig. 10, the back cushion 4 can be tilted forward of the backrest 3 and used as a support cushion, and as shown in Fig. 10(b), the back cushion 4 can be erected on the backrest 3 and used as a headrest. In this case, too, a connector 30 is built into the connection between the backrest 3 and the back cushion 4, making it easy to maintain the backrest in the laid-down position shown in Fig. 10(a) and the upright position shown in Fig. 10(b). Fig. 10(c) shows the state in which the backrest 3 has been moved forward of the seat 2.

[0027] (Embodiment 5) The sofa of the present invention may be a two-seater sofa as shown in Fig. 11(a)(b). In this case, too, a backrest 3 and a back cushion 4 that can be placed on the backrest 3 or lowered in front of it are provided, and a support member 5 is provided on the backrest 3 and behind the back cushion 4. The back cushion 4 and the support member 5 are connected to the back of the back cushion 4 over the entire width of the upper part 5a as shown in Fig. 2 and Fig. 11(c). When the back cushion 4 is placed on the backrest 3, the support member 5 is pushed by the back cushion 4 and stands up, as shown in Fig. 3(a) to Fig. 3(c), and when the back cushion 4 is lowered in front of the backrest 3 as shown in Fig. 3(c) to Fig. 3(a), the support member 5 is pulled forward by the back cushion 4 and falls down on the backrest 3.

[0028] (Embodiment 6) The sofa of the present invention may be a three-seater sofa as shown in Figures 12(a) and (b). In this case, a backrest 3 and a back cushion 4 that can be placed on top of the backrest 3 or lowered forward are provided, and a support member 5 is provided on the backrest 3 and behind the back cushion 4. In this case, the back cushion 4 and the support member 5 are connected as shown in Figures 2 and 11(c).

[0029] (Embodiment 7) In all of the first to sixth embodiments, the backrest 3 can move in the front-rear direction of the seat 2, but in the present invention, the backrest 3 can be fixed so that it does not move in the front-rear direction of the seat 2. In this case, too, the backrest 3, the back cushion 4, and the support member 5 can be provided as shown in Fig. 1, and the support member 5 can be connected to the rear side of the back cushion 4 as shown in Fig. 2, so that when the back cushion 4 is placed on the backrest 3, the support member 5 is pushed by the back cushion 4 to rise up on the backrest 3, and when the back cushion 4 is lowered in front of the backrest 3, the support member 5 is pulled by the back cushion 4 to collapse onto the backrest 3.

[0030] (Embodiment 8) The front-rear moving device 12 in the above embodiment is of a rotating type, but the front-rear moving device in the present invention may be of a moving type that can slide forward and backward. In this case, too, it is preferable that the front-rear moving device be built into the backrest so that it is not visible from the outside. [Industrial Applicability]

[0031] The sofa of the present invention may have or may not have sleeves. The sofa of the present invention may have or may not have a seat frame. The shape, structure, size, forward / backward movement device, opening / closing device structure and attachment structure, and the structure and shape of other components may be changed within the scope of the present invention. [Explanation of symbols]

[0032] 1 seat 2 Seat (top of seat) 3 Backrest 4 Back cushion 4a (Back cushion) bottom 4b (Front of back cushion) 4c (Back of the back cushion) 5 Support material 5a (Top of support) 5b Bottom surface (of support material) 10 Seat frame 10a Rear seat frame 10b Front seat frame 11 Matt 12 Forward and backward movement device 13 Fixing bracket 14 Movable bracket 15a, 15b Arms 16 Bar 17a Outer plate 17b Inner plate 18 Slotted opening (notch) 19 Cut 20 Opening and Closing Devices 20a lower plate 20b Top plate 20c axis 21 Support Frame 22 Support plate 23 Cover plate 30 Connectors

Claims

1. There is a backrest and a back cushion on the seat, and a support on the top of the backrest. The backrest and support are separate from the back cushion. The backrest is attached to the seat by a forward / backward moving device and is disposed on the seat surface, and can be moved back and forth on the seat surface in the forward / backward direction of the seat surface by the forward / backward moving device; The back cushion can be used as a headrest by facing the front side forward, moving the back side upward along the front side of the seat rest, and placing the bottom side on the top side of the backrest, and by moving the back side downward along the front side of the backrest while keeping it in that orientation, lowering it from above the top side of the backrest to the front side of the backrest and placing the bottom side on the seat, it can be used as a support cushion that can support the back of a person sitting on the seat. The upper end of the support material is connected to the back cushion and positioned on the back side of the back cushion, and the base side is connected to the backrest with an opening and closing device and placed on the upper surface of the backrest; when the bottom of the back cushion is placed on the upper surface of the backrest, the back cushion raises the back side of the back cushion above the upper surface of the backrest, allowing the back cushion to be supported from its rear side; when the back cushion is lowered in front of the backrest and the bottom of the back cushion is placed on the seat, the back cushion pulls it forward and collapses it forward on the upper surface of the backrest so that it does not come off the back cushion. The connected back cushion and support material are adapted to move forward and backward together with the backrest when the backrest moves forward and backward on the seat surface, even when their bottom surfaces are placed on the upper surface of the backrest, or when the back cushion is lowered onto the seat surface in front of the backrest and the support material is collapsed on the upper surface of the backrest. A sofa characterized by:

2. The sofa according to claim 1, When the receiving material is pushed by the back cushion and stands up on the backrest, the opening and closing device can support the receiving material without opening beyond a predetermined angle. A sofa characterized by:

3. The sofa according to claim 1 or 2, The opening and closing mechanism is built into the support and backrest. A sofa characterized by:

4. The sofa according to claim 1 or 2, When the support member is pushed by the back cushion and stands up on the backrest, and is supported by the opening and closing device so that it cannot be opened beyond a predetermined angle, the back cushion is supported by the raised support member and is prevented from falling backward any further. A sofa characterized by:

5. The sofa according to claim 1 or 2, A forward / backward moving device has a fixed part and a rotating part that can rotate back and forth in the forward / backward direction of the fixed part, the fixed part is attached to the seat, and the rotating part is built into the backrest so that it cannot be seen from the outside. When the backrest is rotated in the forward / backward direction of the seat, the rotating part rotates in the same direction, so that the backrest can be rotated in the forward / backward direction on the seat. A sofa characterized by:

6. The sofa according to claim 1 or 2, The backrest slides on the seat and can move back and forth in the front and back directions. A sofa characterized by:

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