JP3046819U - sofa - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a footrest that can adjust the angle of the backrest very easily and that can be stowed. The footrest is structurally strong and has excellent durability. In addition, the sofa should have a very simple overall structure. SOLUTION: A seat frame 1 and a backrest frame 2
An armrest 3 rotatably supported on the seat frame 1, a front leg 4 rotatably supported on the seat frame 1, a rear leg 5, and lower portions formed on both sides in the width direction of the seat frame 1. Bent portion 1a ₁ and support portion 1c provided thereunder
When, a guide rod 10 provided on both sides in the width direction of the seat frame 1, a footstool frame 11, a contact portion 12a which abuts the lower side of the bent portion 1a _1, from the upper side of the supporting part 1c And a terminal member 12 attached to the rear end of the footrest vertical frame portion 11a with the engaging recessed portion 12b engaged and displaced back and forth. That the angle can be adjusted.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 According to the present invention, the angle of the backrest can be adjusted very easily, and a footrest that can be stored is attached. The footrest is structurally strong, has excellent durability, and, in addition, has an overall structure. The present invention relates to a sofa whose structure is extremely simple.

[0002]

[Prior art]

 Conventionally, various sofas have been developed. In many of the sofas, there are many so-called reclining types in which the backrest can adjust the angle within a predetermined range with respect to the seat. Others have a footrest on which a person can sit while sitting on a seat.

[0003] In order to adjust the angle of the reclining of the backrest, even though the backrest can be made to be in a rather gentle inclination state, there is no object capable of inclining the backrest until it is substantially flush with the seat. Was. Some footrests can be stored in the lower part of the seat, and others can be stored by folding the footrest together with the seat.

[0004]

[Problems to be solved by the invention]

 Many reclining type sofas whose backrests can adjust the angle within a predetermined range with respect to the seating part often have a tilt adjusting mechanism between the seating part and the backrest. However, in this type, the seat and the backrest become a very complicated mechanism, so that the price is high. For this reason, those equipped with this kind of mechanism are limited to high-end sofas.

[0005] Furthermore, some footrests are separately provided together with the seat. In this type, when the footrest is not needed, it will be in the way and must be stored somewhere. However, such a high-end sofa cannot be used in a home where there is no space to accommodate a sofa and a separate footrest.

There is also a type in which a footrest is mounted on a seat of a sofa and the footrest is pulled out or taken out of the seat only during use. Many types of this type are stored in the lower part of the seat when the footrest is stored, or foldable with the seat.

[0007] By the way, when the footrest can be stored in a lower portion of a seat portion of a sofa or the like, when the footrest is sometimes used, the footrest is fixed to the seat portion in an extremely strong and stable state. There are many things that cannot be done. That is, the durability of the connecting portion between the footrest and the seat is low, and the footrest cannot be in a strong state with respect to the seat. For this reason, the footrest has a drawback that the strength of the connecting mechanism between the footrest and the seat portion is deteriorated in a long-term use, and in the worst case, the footrest is damaged or falls off the seat portion.

[0008] Furthermore, the structure in which the footrest is stored in the lower part of the seat portion is not easy to move during the sliding operation or is difficult to move in the middle of the drawer. Few sofas manufactured for price were satisfactory and could withstand sufficient use.

[0009]

[Means for Solving the Problems]

 Therefore, the inventor of the present invention has conducted intensive studies in order to solve the above-mentioned problems. As a result, the present inventor has pivotally supported the seat frame, the backrest frame, and one longitudinal end thereof rotatably on the backrest frame. An armrest, a front leg rotatably supported by the seat frame, and a rear leg, and the backrest frame is multi-staged from a position substantially perpendicular to the seat frame to a position substantially parallel to the seat frame. The adjustable angle of the sofa makes it possible to adjust the angle of the backrest very easily and comes with a footrest that can be stowed. It is excellent in durability and, in addition, has an extremely simple overall structure, thereby solving the above-mentioned problems.

[0010]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the structure of the present invention mainly includes a seat frame 1, a backrest frame 2, an armrest 3, a front leg 4, a rear leg 5, and a joint member 6. , An angle adjusting claw portion 8, an inclination adjusting member 9 and a footrest frame 11. A seat mat 13, a backrest mat 14, and a footrest mat 15 are arranged on the seat frame 1, the backrest frame 2, the footrest frame 11, and the like.

The seat frame 1 is appropriately bent by a steel pipe, and has a substantially “U” shape in plan view (see FIG. 1). The cross-sectional shape of the steel pipe is substantially elliptical or “0” shaped so that the vertical axis is the major axis. The seat frame 1 includes, on both sides in the width direction, seat vertical frame portions 1a and 1a whose axial lengths are in the front-rear direction, and a seat horizontal frame portion located at the rear of the seat frame 1 in the horizontal direction. 1b, and the seat vertical frame portions 1a, 1a and the seat horizontal frame portion 1b form the above-mentioned substantially "U" shape.

Next, as shown in FIG. 1, the backrest frame 2 is formed of a steel pipe similarly to the seat frame 1, and the cross-sectional shape of the steel pipe is substantially elliptical or “0” as described above. "-Shaped. The backrest frame 2 is composed of backrest vertical frame portions 2a, 2a on both sides in the width direction and a backrest horizontal frame 2b. Has made. Is pivotally connected by a pivot portion P ₁ of the lower end of the rear end and the back frame 2 of the seat frame 1 was used freely pin shaft such rotation so as to enable reclining mechanism and folding (FIG. 2 reference).

[0013] Next, the armrest unit 3, 3, pivot the pivot portion P ₂ using the pin shaft such as its rear end is freely both backrest Tatefu frame portion 2a, pivots 2a of the back frame 2 Connected (see FIG. 2). On the lower surface side of the armrests 3, 3, a tilt adjusting member 9 described later is mounted, and further connected to a front leg 4 and a rear leg 5 described later via the tilt adjusting member 9. (See FIG. 2).

As shown in FIG. 1, the front leg portion 4 and the rear leg portion 5 are each formed in a substantially inverted gate shape, and like the seat frame 1 or the backrest frame 2, a steel pipe is formed. Is formed from. And, as described above, the steel pipe has a substantially elliptical shape or a zero-shaped shape so that the longitudinal axis is in the vertical direction. First, the front leg portion 4 includes front leg vertical frames 4a, 4a on both sides in the width direction, and a front leg bottom frame 4b. The rear leg 5 is composed of rear leg vertical frames 5a, 5a on both sides in the width direction and a rear leg bottom frame 5b.

The front leg vertical frames 4a, 4a of the front leg 4 are located outside the both seat vertical frames 1a, 1a of the seat frame 1, and the axes of the front leg vertical frames 4a, 4a. long medial than slightly upward position and the seat vertical frame 1a, and is pivotally connected at pivot portion P _3, P ₃ such that the axial direction substantially intermediate position of 1a becomes rotatable together.

The upper ends of the front leg vertical frames 4 a, 4 a of the front leg 4 and the rear leg vertical frames 5 a, 5 a of the rear leg 5 are connected by a joint member 6 so as to be rotatable with each other. . The joint member 6 is formed in a cover shape, and pivot joints P ₄ , P ₄ using a pin shaft or the like so that the upper ends of the front leg vertical frames 4a, 4a are rotatable. (See FIGS. 1 and 2).

Also, both rear leg vertical frames 5 a, 5 a of the rear leg 5 are connected to both seat vertical frames 1 a, 1 a of the seat frame 1 by link members 7, 7. The link member 7 has one end connected via a pivot portion P ₁ of the seat frame 1 and the back frame 2, the axial length direction of the intermediate or middle of the other end of the link member 7 rearward Ashitate frame 5a are connected by a pivotal support P _5, P ₅ using slightly pin shaft so as to be rotatable in a lower position such as from between (see FIGS. 1 and 2).

[0018] The stopper portion 7a is formed in the pivot portion P ₁ side of the link member 7, the stopper over portion 7a comes into contact with the rear Ashitate frame 5a at above the position of the pivotal support P _5. At that position, the link member 7 is fixed at a predetermined angle with respect to the seat frame 1 (see FIG. 5B). Also, when folding the sofa pivots pivot portion P ₁ of the link member 7 around the pivot portion P ₅ positions, rear Ashitate frame 5a stopper over portion 7a is at a lower position than the pivot portion P ₅ Abut.

Next, the angle adjusting claw 8 and the inclination adjusting member 9 will be described. First, the angle adjustment in the reclining of the seat frame 1 and the backrest frame 2 is performed by a combination of the angle adjusting claw 8 and the inclination adjusting member 9. The inclination adjusting member 9 has a substantially rectangular parallelepiped shape elongated in the longitudinal direction.

First, the frame 9a has a substantially inverted concave cross section perpendicular to the longitudinal direction (see FIGS. 3A, 4C and 4D). Widthwise center of the frame 9a is inserted groove 9a ₁ is formed, engagement gear 9b a plurality of consecutive in the insertion groove 9a in _1, 9b, ... are formed along the longitudinal direction of the frame body 9a [See FIGS. 3A and 3B]. The engaging teeth 9b, 9b,... Are formed above the frame 9a and formed downward (see FIGS. 3A and 3B). The insertion groove 9a ₁ of and engagement gear 9b below, 9b, the ... below the housed groove 9c is formed [FIG 3 (A), (B) refer to Fig.

As described above, the angle adjusting claws 8 are associated with the respective engaging teeth 9 b, 9 b,... And are connected and fixed to the joint member 6. The angle adjusting claw 8 is formed by integrally forming an engaging piece 8a and a connecting piece 8b, and the engaging piece 8a and the connecting piece 8b form a substantially T-shape [ FIG. 3 (A)].

The widthwise side portions of the engaging pieces 8a, the inserted from the insertion groove 9a ₁ to the frame 9a of the tilt adjusting member 9, loosely inserted is widthwise sides is receiving groove 9c of the engaging pieces 8a, 9c, [See FIGS. 4C and 4D]. When the angle adjusting claw 8 is not engaged with the engaging teeth 9b, 9b,..., The angle adjusting claw 8 reciprocates in the longitudinal direction of the frame 9a along the storage grooves 9c, 9c. It becomes movable [see FIG. 4 (B)].

The angle adjusting claw portion 8 is configured to engage with the engaging tooth portions 9b, 9b,. 4A, the inclination adjusting member 9 is pulled up together with the armrest 3 so that the angle adjusting claw 8 and the engaging teeth 9b, 9b,. It has been released. 4B, the angle adjusting claw 8 moves in the storage groove 9c in a state where the angle adjusting claw 8 and the inclination adjusting member 9 are released, and an appropriate engagement tooth 9b is provided. In a state of being engaged.

FIG. 4C is a cross-sectional view of the state in which the angle adjusting claw portion 8 and the engaging tooth portion 9b are engaged when viewed from the front, and FIG. Is a cross-sectional view of the state in which the engagement between the angle adjusting claw portion 8 and the engagement tooth portion 9b is released, as viewed from the front. The number of the engaging teeth 9b, 9b,... Corresponds to the number of steps that determines the angle adjustment of the reclining of the backrest frame 2. For example, in the case where the number of reclining steps of the backrest frame 2 is 12, 11 engaging teeth 9b may be formed.

The engagement between the angle adjusting claw 8 and the inclination adjusting member 9 can be released by slightly lifting the armrests 3 and 3 upward. As a result, the tilt adjusting member 9 mounted on the armrests 3 and 3 moves upward, and the engagement between the engaging piece 8a of the angle adjusting claw 8 and the appropriate engaging tooth 9b is released. . With the engagement pieces 8a and the appropriate engagement teeth 9b released, the armrests 3, 3 are moved in the front-rear direction, and the angle adjustment claw is attached to the engagement teeth 9b corresponding to the desired reclining angle. 8 are engaged.

Next, as shown in FIG. 1, the footrest frame 11 is composed of footrest vertical frame parts 11a, 11a and footrest horizontal frame parts 11b. Alternatively, it is formed of a steel pipe similarly to the backrest frame 2, and the cross-sectional shape of the steel pipe is substantially elliptical or 0-shaped so that the vertical axis is a long axis.

The footrest vertical frame portions 11a, 11a are adapted to fit inside the both seat vertical frame portions 1a, 1a of the seat frame 1 (see FIG. 7B). The guide rods 10, 10 mounted on the seat vertical frames 1a, 1a of the seat frame 1 are inserted into the footrest vertical frames 11a, 11a, and the seat frame 1 is , 10 along the axial direction. The guide rod 10 is mounted inside the both seat vertical frames 1a, 1a and along the longitudinal direction of the seat vertical frames 1a, 1a (see FIG. 1).

As shown in FIG. 8A, the guide rod 10 is composed of a shaft rod 10a and a mounting piece 10b, and the mounting piece 10b is provided behind each seat vertical frame 1a. It is fixed to the end side and the inner side with a fixing tool such as a screw (see FIG. 8B). The shaft 10a is inserted into the vertical frame 11a of the foot frame 11 so that the vertical frame 11a can reciprocate along the axial length of the shaft 10a.

As shown in FIGS. 8A and 8B, end members 12, 12 are mounted on the rear ends of the footrest vertical frame portions 11a, 11a. The end member 12 includes a contact portion 12a and an engagement concave portion 12b, and has a structure in which the footrest vertical frame portion 11a is inserted into the inserted portion 12c. The contact portion 12a and the engagement recess 12b are shifted by a dimension L in the front-rear direction, and the contact portion 12a is located behind the engagement recess 12b (see FIG. 9A). .

The abutting portions 12a are arcuate surface 12a ₁ is formed, circular arc-shaped surface 12a ₁ is facing upwards. Due to the deviation of the dimension L, even when a person's foot rests on the footrest frame 11, the weight can be sufficiently endured.

The engaging recess 12b faces the lower surface. Further, seat vertical frame 1a of the seat frame 1, 1a is bent section 1a ₁ which is bent downward, 1a ₁ is formed at the front end portion of the bent portion 1a _1, 1a ₁ is of the abutment portion 12a arcuate surface 12a ₁ is present I Do into abutment. Further, a support portion 1c is formed in the bent portions 1a ₁ , 1a ₁ , and the support portion 1c and the engagement recess 12b of the terminal member 12 are configured to be engaged.

[0032]

[Action]

 To adjust the angle of the backrest against the seat, first lift the armrests 3 and 3 lightly upward. The two inclination adjusting members 9, 9 move upward together with the two armrests 3, 3, and the engagement between the engaging teeth 9b, 9b,... Of the inclination adjusting member 9 and the angle adjusting claw 8 is released [ FIG. 4 (A)]. With the angle adjusting claw 8 and the engaging teeth 9b, 9b,... Disengaged, the armrests 3, 3 are moved in the front-rear direction.

At this time, the armrests 3, 3 are connected to the pivots P_Two, P_TwoRotate the backrest frame 2 connected by, so that the angle changes with respect to the seat frame 1. When the backrest frame 2 is at a desired angle with respect to the seat frame 1, the armrests 3, 3 are moved downward again, and the engaging teeth 9b, 9b,. 8 is engaged. As a result, the backrest frame 2 is ₁ , Pivot P_TwoIt is supported and fixed at three points of engagement between the angle adjusting claw 8 and the inclination adjusting member 9 (see FIG. 2).

Next, regarding use of the footrest frame 11, first, the footrest frame 11 is pulled forward from the seat frame 1. At this time, the footrest vertical frame portions 11a, 11a of the footrest frame 11 move along the guide rods 10, 10 provided on the seat vertical frame portions 1a, 1a. When the foot frame 11 is fully extended in front of the seat frame 1, the contact portion 12a of the end member 12 is located at the bent portion 1a ₁ at the tip of the foot frame vertical frame portion 11a. contact portion 12a abuts than the lower bent portion 1a _1, the engaging recess 1 2b is engaged from above the support portion 1c [see FIG. 9 (B)].

In this manner, the footrest frame 11 is pulled out forward from the seat frame 1 and is fixed. The fixed state is such that the contact portion 12a of the terminal member 12 mounted on the seat frame 1 and the engagement recess 12b are formed so as to be shifted in the front-rear direction with a dimension L, and the support portion 1c and the engagement recess 12b are formed. And a contact point between the contact portion 12a and the bent portion 1a ₁ is set as a power point. When the foot is placed on the footrest frame 11, it becomes an action point, and the footrest frame 11 is firmly fixed. Fixed to.

[0036]

[Effect of the invention]

 The invention according to claim 1 is characterized in that the seat frame 1, the backrest frame 2, the armrests 3, 3 whose one longitudinal end is rotatably supported on the backrest frame 2, and the seat frame 1 is rotatable. The sofa is composed of a front leg 4 pivotally supported and a rear leg 5, and the angle of the backrest frame 2 can be adjusted in multiple stages so as to be substantially parallel to the seat frame 1 from a position substantially perpendicular to the seat frame 1. By doing so, the backrest frame 2 can be made substantially parallel to the seat frame 1, and it can be used as a bed.

Next, a second aspect of the present invention is to provide a seat frame 1, a backrest frame 2, armrests 3, 3 whose one longitudinal end is rotatably supported on the backrest frame 2, A front leg 4, a rear leg 5, rotatably supporting the part frame 1, a joint member 6 for rotatably connecting a top intersection of the front leg 4, and the rear leg 5, and the joint member 6 are attached to the lower surface of the armrests 3, 3 and a plurality of continuous engaging teeth 9b, 9b,... Are formed in the longitudinal direction to form the engaging teeth 9b. , 9b, ..., the angle adjusting claw 8 is engaged with the tilt adjusting member 9 which is separated by upward movement, and the backrest frame 2 is substantially parallel to the seat frame 1 from a position substantially perpendicular thereto. With a sofa that can be adjusted in multiple stages so that it can be positioned Ri, It can easily be adjusted reclining, it is possible that the structure also Ki out very simply, to provide at a low price.

The effect is described in detail. An angle adjusting claw 8 is provided on a joint member 6 for connecting the front leg 4 and the rear leg 5, and is attached to the lower surface side of the armrests 3, 3. .. Are provided in the longitudinal direction, so that the armrests 3, 3 are only slightly moved up and down, and the inclination together with the armrests 3, 3 is inclined. The adjusting members 9, 9 also move up and down, whereby the engaging teeth 9b, 9b,... And the angle adjusting claw 8 can be engaged and separated, and the angle adjustment and fixing of the backrest frame 2 can be performed. Can be made simple and quick. Furthermore, in the present invention, the reclining structure is constituted by the inclination adjusting members 9 and 9 provided on the armrests 3 and 3 and the angle adjusting claws 8 and 8, which is an extremely simple structure.

Next, according to a third aspect of the present invention, in the first aspect, the seat frame 1 includes a support portion 1c provided below the bent portions 1a ₁ , 1a ₁ and two sides of the seat frame 1 in the width direction. The guide rods 10, 10 provided, the footrest frame 11 having, on both sides in the width direction, footrest vertical frame parts 11a, 11a through which the guide rods 10, 10 are inserted in the axial direction, and the bent part 1a. ₁ , 1a A contact portion 12a that contacts the lower side of ₁ and an engaging concave portion 12b that engages from the upper side of the support portion 1c are provided so as to be shifted back and forth, and the footrest vertical frame portions 11a, 11a The sofa is made up of end members 12 and 12 attached to the rear end, and the angle of the backrest frame 2 can be adjusted in multiple stages from a substantially right angle position to a substantially parallel position with respect to the seat frame 1. As a result, from the seat frame 1 to the seat frame 1 The guide rods 10, 10 are attached, and the footrest vertical frame portions 11a, 11a move along the axial length direction of the guide rods 10, 10, so that the footrest frame 11 can be easily and accurately pulled out. Can be.

Further, since the end member 12 is formed by shifting the contact portion 12 a and the engagement concave portion 12 b in the front-rear direction, a moment of a force generated by a load caused by placing a foot on the footrest frame 11. Works, and can be made extremely durable.

Next, in the invention of claim 4, according to claim 2, the bent portions 1a ₁ , 1a ₁ formed on both sides in the width direction of the seat frame 1 and bent downward, and the bent portions 1a ₁ , 1a, a supporting portion 1c provided below ₁ , a guide bar 10, 10 provided on both sides in the width direction of the seat frame 1, and a foot frame vertical frame portion through which the guide bars 10, 10 are inserted in the axial direction. 11 a, a leg table frame 11 having 11a on both sides in the width direction, a contact portion 12a which abuts on the lower side in the bent portion 1a _1, 1a _1, engagement of the engagement from the upper side of the supporting part 1c The backrest frame 2 is substantially shifted with respect to the seat frame 1 from the end frames 12a and 12b provided at the rear end of the footrest vertical frame portions 11a and 11a. The angle can be adjusted in multiple steps so that it is almost parallel from the right angle position By using a sofa, the angle of the backrest frame 2 can be easily and quickly adjusted, and the search for the footrest frame 11 can be made extremely simple. The other effects are substantially the same as those of the second and third aspects.

[Brief description of the drawings]

FIG. 1 is a perspective view of the present invention.

FIG. 2 is a side view showing the operation of the present invention.

FIG. 3A is a perspective view of a main part showing an armrest portion and an inclination adjusting member of the present invention; and FIG. 3B is a longitudinal sectional side view showing a relation between an armrest portion, an inclination adjusting member and an angle adjusting claw portion of the present invention.

FIG. 4 (A) shows that the angle adjusting claw portion and the engagement tooth portion are released,
FIG. 4B is a side view showing a state in which the inclination adjusting member is in a free state. FIG. 4B is a side view showing a state in which the angle adjusting claw and the engaging tooth are engaged. (D) is a longitudinal sectional front view showing a state in which the angle adjusting claw portion and the engaging tooth portion are released.

5A is a side view showing a state in which the backrest frame is substantially vertical, and FIG. 5B is an enlarged side view of a main part in a state in which the backrest frame is substantially vertical.

6A is a side view showing a state in which the backrest frame is substantially parallel to the seat frame; FIG. 6B is an enlarged side view of a main part in a state in which the backrest frame is substantially parallel to the seat frame;

FIG. 7A is an operation view of the footrest frame as viewed from the inside in a side view showing the operation state of the footrest frame; FIG.

8A is a perspective view of a main part of a footrest frame, and FIG. 8B is a perspective view and a cross-sectional view of a main part of a footrest frame.

FIG. 9A is an operation view showing a state in which the terminal member of the footrest frame is close to the bent portion of the vertical seat part frame. FIG. Operational diagram showing the state locked to the bent portion

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Seat frame 1a ₁ ... Bending part 1c ... Support part 2 ... Backrest frame 3 ... Armrest part 4 ... Front leg part 5 ... Rear leg part 6 ... Joint member 8 ... Angle adjustment claw part 9 ... Inclination adjustment member 9b ... Engagement Toothed portion 11: Footrest frame 11a: Footrest vertical frame portion 12: End member 12a: Contact portion 12b: Engagement concave portion

Claims (4)

[Utility model registration claims] 1. A seat frame, a backrest frame,
One end in the longitudinal direction is composed of an armrest rotatably supported on the backrest frame, a front leg rotatably supported on the seat frame, and a rear leg, and the backrest frame is attached to the seat frame. A sofa characterized in that the angle can be adjusted in multiple stages so that the position is substantially parallel to a substantially perpendicular position. 2. A seat frame, a backrest frame,
An armrest, one end of which in the longitudinal direction is rotatably supported on the backrest frame, a front leg, which is rotatably supported on the seat frame, a rear leg, and a front leg and a rear leg. A joint member rotatably connecting the top intersection, an angle adjusting claw provided on the joint member, and a plurality of continuous engaging teeth formed in a longitudinal direction mounted on a lower surface side of the armrest; The angle adjusting claw portion engages with the engaging tooth portion, and the tilt adjusting member is separated from the seat frame by the upward movement. A sofa characterized by the ability to adjust the angle in multiple stages. 3. A seat frame, a backrest frame,
One end in the longitudinal direction of the armrest is rotatably supported on the backrest frame, the front leg is rotatably supported on the seat frame, and the rear leg is formed on both sides in the width direction of the seat frame. A bent portion bent downward, a support portion provided below the bent portion, a guide rod provided on both sides in the width direction of the seat frame, and a footrest vertical frame through which the guide rod is inserted in the axial direction. A foot frame having portions on both sides in the width direction, an abutting portion abutting on a lower side of the bent portion, and an engaging concave portion engaging from above the supporting portion, which are provided to be shifted back and forth, And a terminal member attached to the rear end of the vertical frame portion, wherein the angle of the backrest frame can be adjusted in multiple stages from a substantially right angle position to a substantially parallel position with respect to the seat frame. Sofa to do. 4. A seat frame, a backrest frame,
An armrest, one end of which in the longitudinal direction is rotatably supported on the backrest frame, a front leg, which is rotatably supported on the seat frame, a rear leg, and a front leg and a rear leg. A joint member rotatably connecting the top intersection, an angle adjusting claw provided on the joint member, and a plurality of continuous engaging teeth formed in a longitudinal direction mounted on a lower surface side of the armrest; An inclination adjusting member that engages with the engaging tooth portion and is separated by upward movement, a bent portion formed on both sides in the width direction of the seat frame and bent downward; A supporting portion provided below, a guide rod provided on both sides in the width direction of the seat frame, and a footrest frame having on both sides in the width direction a footrest vertical frame portion in which the guide rod is inserted in the axial direction. An abutting portion that abuts on a lower side of the bent portion; An engaging recess engaged from above the holding portion is provided shifted from front to back, and a terminating member is provided at the rear end of the footrest vertical frame portion, and the backrest frame is attached to the seat frame. A sofa characterized in that the angle can be adjusted in multiple stages from a substantially right angle position to a substantially parallel position.