Angle adjustment accessory and legless seat and sofa using the angle adjustment accessory

Abstract

The present invention provides an angle adjustment accessory that can adjust the angle without unfolding two expandable structural components to a relative horizontal position. When the second component is rotated in the relative folding direction, the claw control component is limited so as not to rotate therewith, and the tooth surface of the claw component moves to the arc surface of the rotating part, thereby releasing the meshing state between the gear part of the second component and the tooth surface of the claw component. Then, when the second component is rotated in the relative unfolding direction, the first control part of the claw control component that rotates with the second component limits the claw component, and the tooth surface of the claw component is limited so as not to mesh with the gear part of the second component. In addition, by further rotating the second component in the relative folding direction by a specified small angle, the claw control component that rotates with the second component is limited, and the limit of the claw component by the claw control component is released, thereby making the tooth surface of the claw component mesh with the gear part of the second component, and limiting the rotation of the second component in the relative unfolding direction.

Description

Technical Field

[0001] The invention relates to an angle adjustment accessory and seats such as a legless seat and a sofa. Background Art

[0002] In the past, there have been angle adjustment accessories such as ratchet accessories for legless seats, which are installed at the connection between the seat plate and the back column plate of the legless seat and are used to adjust the inclination angle of the back column plate relative to the seat plate to a desired angle (see patent document 1).

[0003] Patent Literature

[0004] Patent Document 1: Japanese Utility Model Publication No. 59-20118 Summary of the invention

[0005] However, in the above-mentioned ratchet attachment for a legless chair, as shown in FIG. 1, if the back post frame B is to be adjusted to a desired tilt angle relative to the seat frame A, the frame B must first be laid down to a horizontal position, and then the frame B must be pulled up to adjust the tilt angle. Therefore, the operation of adjusting the tilt angle is laborious.

[0006] In particular, when the component frame B is installed next to a wall, if there is not enough space between the component frame B and the wall surface, there is a problem that the inclination angle of the component frame B cannot be adjusted.

[0007] In view of the above problems, an object of the angle adjustment fitting according to the present invention is to provide an angle adjustment fitting that can adjust the angle even if two deployable structural members are not deployed to a relatively horizontal position.

[0008] In order to solve the above problems, the angle adjustment accessory involved in the present invention includes:

[0009] A first member 10, wherein the first member 10 includes a rotation receiving portion 12 having a pair of opposing side wall portions 13, 14, and the main support shaft 70 and the auxiliary support shaft 50 pass through the rotation receiving portion 12 in parallel at a predetermined interval;

[0010] a second member 20, the second member 20 having a rotating portion 22 having a gear portion 26 and an arc surface portion 27 continuous with the gear portion 26, the second member 20 being disposed between the side walls 13 and 14 of the first member 10 so as to be supported so as to be rotatable about the main support shaft 70;

[0011] A claw member 30, in which a tooth surface 35 formed by a plurality of claws arranged in a row is provided on an inner surface of a control receiving portion 34 extending from a claw member body 31, and the claw member 30 is rotatably supported by a secondary support shaft 50 of the first member 10;

[0012] a spring member 40 installed in the first member 10 and applying a force to rotate the claw member 30 toward the second member 20; and

[0013] a claw control member 60, the claw control member 60 including a first control portion 64 extending from a claw control member body 61, the claw control member 60 being rotatably supported by a main support shaft 70 and being rotatable together with the second member 20,

[0014] During the process of rotating the second component 20 in the relative folding direction, the claw control component 60 is limited so as not to rotate together with the claw component 30, and the tooth surface 35 of the claw component 30 moves to the arc surface 27 of the rotating portion 22, thereby releasing the meshing state between the gear portion 26 of the second component 20 and the tooth surface 35 of the claw component 30.

[0015] Next, while the second member 20 is being rotated in the relative unfolding direction, the first control portion 64 of the claw control member 60 that rotates together with the second member 20 limits the claw member 30, and the tooth surface 35 of the claw member 30 is limited so as not to mesh with the gear portion 26 of the second member 20.

[0016] On the other hand, by further rotating the second component 20 in the relative folding direction by a specified small angle, the claw control component 60 that rotates together with the second component 20 is limited, and the limitation of the claw component 30 by the claw control component 60 is released, thereby making the tooth surface 35 of the claw component 30 mesh with the gear portion 26 of the second component 20, limiting the rotation of the second component 20 in the relative unfolding direction.

[0017] According to the present invention, by rotating the second member in the relative folding direction, the unfolding direction, and the folding direction, the unfolding angle of the second member can be adjusted to a desired position without laying the second member down to a horizontal position.

[0018] In particular, even if the second component is set near the wall, since it is not necessary to unfold the second component to a horizontal position, the unfolding angle can be adjusted even if there is not enough space between the second component and the wall, thereby obtaining an angle adjustment accessory that is easy to use.

[0019] As an embodiment of the present invention, the claw control member 60 itself may be regulated by causing the first control portion 64 extending from the claw control member body 61 of the claw control member 60 to abut against the bottom surface of the first member 10 .

[0020] According to the present embodiment, the claw control member 60 can be regulated by causing the first control portion 64 to abut against the bottom surface of the first member 10. Thus, an angle adjustment fitting having stable operation characteristics can be obtained.

[0021] As another embodiment of the present invention, the claw control member 60 itself may be restricted by causing the second control portion 67 extending from the claw control member body 61 of the claw control member 60 to abut against the claw member body 31 of the claw member 30 .

[0022] According to the present technical solution, since the distance between the fulcrums of the main support shaft and the auxiliary support shaft can be manufactured with high dimensional accuracy, the assembly error is reduced, and an angle adjustment accessory with less fluctuation in action characteristics can be obtained.

[0023] As another embodiment of the present invention, the second member 20 itself may be restricted by causing the restricting rib 22 a of the second member 20 to abut against the second control portion 67 abutting against the claw member main body 31 of the claw member 30 .

[0024] According to the present embodiment, since the second member 20 itself can be limited in position, the rotation operation of the second member 20 can be limited to the minimum necessary limit when adjusting the angle, thereby obtaining an angle adjustment accessory that is easy to use.

[0025] As another embodiment of the present invention, the claw member 30 may be formed by joining two metal plates.

[0026] According to this embodiment, the claw member 30 can be formed by combining metal plates thinner than those in the above-mentioned embodiments. Thus, an angle adjustment fitting that can be manufactured easily and at low cost can be obtained.

[0027] As a different embodiment of the present invention, annular ribs 63 may be provided on the opening edge portions of the shaft hole 62 of the claw control member 60 .

[0028] According to the present embodiment, it is possible to suppress the one-sided contact between the claw control member 60 and the rotating portion 22 of the second member 20, and obtain an angle adjustment fitting having smooth operation characteristics.

[0029] As another embodiment of the present invention, the claw control member 60 may be formed by joining and integrating two metal plates having an annular rib 63 formed by press working.

[0030] According to the present embodiment, the annular rib 63 is elastically deformed to absorb and alleviate component errors and assembly errors, thereby obtaining an angle adjustment fitting with less fluctuation in operating characteristics.

[0031] As another embodiment of the present invention, the spring member 40 may be formed by bending a wire-shaped spring material.

[0032] According to the present embodiment, since positioning can be performed by passing the spring member 40 through the auxiliary support shaft, an angle adjustment fitting that is easy to assemble can be obtained.

[0033] As another embodiment of the present invention, the spring member 40 may be formed of a leaf spring.

[0034] According to this embodiment, it is possible to obtain an angle adjustment fitting that can apply a more accurate urging force.

[0035] As a different embodiment of the present invention, the gear portion 26 may be provided with a step 26 a located on the inner side of the arc surface portion in the plate thickness direction.

[0036] According to this embodiment, even if burrs are formed on the gear portion due to machining, the burrs do not contact the inward surface of the rotating portion, so that an angle adjustment fitting that has a small number of machining steps and performs a smooth rotating operation can be obtained.

[0037] In order to solve the above-mentioned problems, the legless chair or sofa according to the present invention may be a legless chair or sofa to which the above-mentioned angle adjustment fitting is applied.

[0038] According to the present invention, by rotating the second member in the relative folding direction, the unfolding direction, and the folding direction, the unfolding angle of the second member can be adjusted without laying the second member down to a horizontal position.

[0039] Especially, even if the second component is arranged near the wall, it is not necessary to unfold the second component to a horizontal position. Thus, there is the following effect: even if there is not enough space between the second component and the wall, the unfolding angle can be adjusted to obtain a legless chair and sofa that is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a perspective view showing a first embodiment of the angle adjustment fitting according to the present invention.

[0041] Figure 2 for Figure 1 An exploded perspective view of the angle adjustment accessory is shown.

[0042] Figure 3 for Figure 2An enlarged perspective view of the claw assembly is shown.

[0043] Figure 4 To observe from different angles Figure 2 An enlarged perspective view of the claw component shown.

[0044] Figure 5 for Figure 2 A perspective view of the spring component is shown.

[0045] Figure 6 for Figure 1 A partially cutaway perspective view of the angle adjustment accessory is shown.

[0046] Figure 7 for Figure 6 A front sectional view of the main parts of the angle adjustment accessory is shown.

[0047] Figure 8 for Figure 1 A cutaway perspective view of the angle adjustment accessory is shown.

[0048] Fig. 9 for Figure 8 A front sectional view of the main parts of the angle adjustment accessory is shown.

[0049] Fig.10 It is a front cross-sectional view of the main parts for explaining the operation of the first embodiment of the angle adjustment attachment according to the present invention.

[0050] Fig.11 To illustrate the following Fig.10 A front sectional view of the main parts showing the action of the angle adjustment accessory involved in the present invention.

[0051] Fig.12 To illustrate the following Fig.11 A front sectional view of the main parts showing the action of the angle adjustment accessory involved in the present invention.

[0052] Fig.13 To illustrate the following Fig.12 A front sectional view of the main parts showing the action of the angle adjustment accessory involved in the present invention.

[0053] Fig.14 To illustrate the following Fig.13 A front sectional view of the main parts showing the action of the angle adjustment accessory involved in the present invention.

[0054] Fig.15 To illustrate the following Fig.14 A front sectional view of the main parts showing the action of the angle adjustment accessory involved in the present invention.

[0055] Fig.16To illustrate the following Fig.15 A front sectional view of the main parts showing the action of the angle adjustment accessory involved in the present invention.

[0056] Fig.17 To illustrate the following Fig.15 A front sectional view of the main parts showing the action of the angle adjustment accessory involved in the present invention.

[0057] Fig.18 To illustrate the following Fig.17 A front sectional view of the main parts showing the action of the angle adjustment accessory involved in the present invention.

[0058] Fig.19 It is a perspective view showing a claw control member of a second embodiment of the angle adjustment fitting according to the present invention.

[0059] Fig. 20 To indicate that it is loaded Fig.19 A longitudinal sectional perspective view of the state of the claw control component involved.

[0060] Fig.21 To indicate that it is loaded Fig.19 This is a front sectional view of the main parts showing the state of the claw control component involved.

[0061] Fig. 22 It is a perspective view showing a third embodiment of the angle adjustment fitting according to the present invention.

[0062] Fig.23 for Fig. 22 A longitudinal section through the angle adjustment fitting is shown.

[0063] Fig.24 for Fig. 22 An exploded perspective view of the angle adjustment accessory is shown.

[0064] Fig.25 for Fig.24 A perspective view of the claw control component is shown.

[0065] Fig.26 for Fig. 22 A front sectional view of the main parts of the angle adjustment accessory is shown.

[0066] Fig. 27 for Fig. 22 A front sectional view of the main parts of the angle adjustment accessory is shown.

[0067] Fig.28 It is a front cross-sectional view of the main parts for explaining the operation of the third embodiment of the angle adjustment attachment according to the present invention.

[0068] Fig.29 To illustrate the following Fig.28 A front sectional view of the main parts at different cutting positions of the action of the angle adjustment accessory involved in the present invention.

[0069] Fig.30 To illustrate the following Fig.29 A front sectional view of the main parts showing the action of the angle adjustment accessory involved in the present invention.

[0070] Fig.31 To illustrate the following Fig.30 A front sectional view of the main parts showing the action of the angle adjustment accessory involved in the present invention.

[0071] Fig.32 To illustrate the following Fig.31 A front sectional view of the main parts showing the action of the angle adjustment accessory involved in the present invention.

[0072] Fig.33 To illustrate the following Fig.32 A front sectional view of the main parts showing the action of the angle adjustment accessory involved in the present invention.

[0073] Fig.34 To illustrate the following Fig.33 A front sectional view of the main parts showing the action of the angle adjustment accessory involved in the present invention.

[0074] Fig.35 To illustrate the following Fig.34 A front sectional view of the main parts showing the action of the angle adjustment accessory involved in the present invention.

[0075] Fig.36 To illustrate the following Fig.34 A front sectional view of the main parts showing the action of the angle adjustment accessory involved in the present invention.

[0076] Fig.37 To illustrate the following Fig.36 A front sectional view of the main parts showing the action of the angle adjustment accessory involved in the present invention.

[0077] Fig.38 It is an exploded perspective view showing a fourth embodiment of the angle adjustment fitting according to the present invention.

[0078] Fig.39 It is a front cross-sectional view of the main parts showing a fourth embodiment of the angle adjustment fitting according to the present invention.

[0079] Fig.40 It is a perspective view showing a fifth embodiment of the angle adjustment fitting according to the present invention.

[0080] Fig.41 for Fig.40 A partially cutaway perspective view of the angle adjustment accessory is shown.

[0081] Fig.42 for Fig.40 A perspective view of the main parts of the angle adjustment accessory is shown.

[0082] Fig.43 To observe from different angles Fig.42 The main part stereogram shown is a main part stereogram.

[0083] Fig.44 It is a perspective view showing a claw member according to a fifth embodiment.

[0084] Fig.45 for Fig.44 An exploded perspective view of the claw assembly is shown. DETAILED DESCRIPTION

[0085] based on Figures 1 to 39 , the embodiments of the present invention are described.

[0086] like Figure 1 as well as Figure 2 As shown, the angle adjustment fitting according to the first embodiment is composed of a first member 10 , a second member 20 , a claw member 30 , a spring member 40 , a sub-support shaft 50 , a claw control member 60 , and a main support shaft 70 .

[0087] It should be noted that Figure 2 In the figure, for convenience of explanation, the first component 10 is shown in cross-sectional view.

[0088] The first component 10 is composed of a mounting portion 11 and a rotation receiving portion 12 connected thereto. The rotation receiving portion 12 has a pair of opposing side walls 13, 14. The pair of side walls 13, 14 are provided with a first bearing hole 15 and a second bearing hole on the same axis.

[0089] It should be noted that the first component 10 of the present embodiment is manufactured by stamping one metal plate, but the present invention is not limited thereto. For example, the first component 10 may be manufactured by stamping two separate metal plates and then joining and integrating the metal plates.

[0090] In addition, the mounting portion 11 is not limited to a cylindrical shape, and may be, for example, a square tube shape, a prism shape, or a plate shape.

[0091] The second component 20 is composed of a mounting portion 21 and a rotating portion 22 connected thereto. The rotating portion 22 has a pair of gear plate portions 23 and 24 that are opposite and substantially disc-shaped. The shaft holes 25 of the pair of gear plate portions 23 and 24 are arranged on the same axis. In addition, a continuous gear portion 26 and an arc surface portion 27 are formed on the outer peripheral surface of the gear plate portions 23 and 24.

[0092] It should be noted that the second component 20 of the present embodiment is manufactured by stamping one metal plate, but the present invention is not limited thereto. For example, the second component 20 may be manufactured by stamping two separate metal plates and then joining and integrating the metal plates.

[0093] In addition, the mounting portion 21 is not limited to a cylindrical shape, and may be, for example, a square tube shape, a prism shape, or a plate shape.

[0094] like Figure 3 as well as Figure 4 As shown in FIG. 1 , in the claw member 30, an axial hole 32 is provided on a substantially cylindrical claw member body 31. In addition, in the claw member 30, an annular rib 33 ( Figure 4 ). Moreover, the claw member 30 has a wide control receiving portion 34 extending inward from the outer peripheral surface of the claw member body 31. The control receiving portion 34 has a tooth surface 35 on which a plurality of claws are arranged on its inner surface, and in particular, a locking claw portion 36 is arranged at the lowest end of the tooth surface 35. In order to ensure a space for installing the spring member 40 described later, the claw member 30 is provided with a step portion 37.

[0095] like Figure 5 As shown, the spring member 40 is formed of a coil spring that can be passed through the auxiliary support shaft 50 described later. In the spring member 40, the first end 41 thereof extends straight, and the second end 42 thereof is bent in a substantially L-shape.

[0096] It should be noted that the spring member 40 of the present embodiment is not limited to a coil spring, but may be formed of a leaf spring. In this case, it may be arranged at an appropriate position inside the first member 10, for example, at the bottom surface of the first member 10.

[0097] like Figure 2 As shown, in the claw control member 60, an axial hole 62 is provided in a disc-shaped claw control member body 61. In addition, annular ribs 63, 63 are respectively provided on the opening edge portions on both sides of the axial hole 62. Furthermore, the claw control member body 61 has a first control portion 64 extending from its outer peripheral surface toward the claw member 30. The first control portion 64 has a claw receiving portion 65 at the lower end of its inward surface, and a stopper surface 66 at the lower surface of its front end.

[0098] Next, the assembling method of this embodiment will be described.

[0099] The auxiliary support shaft 50 is inserted from the first bearing hole 15 provided in the side wall portion 13 of the first member 10, and passes through the claw member 30 and the spring member 40 which are arranged in advance between the side wall portions 13 and 14. Next, the auxiliary support shaft 50 is passed through the first bearing hole 15 of the side wall portion 14 to be positioned. At this time, the first end portion 41 of the spring member 40 is pressed against the inner peripheral surface of the first member 10, and the second end portion 42 thereof is locked to the lower edge portion of the claw member 30. Thus, the claw member 30 is applied with a force for always pressing the tooth surface 35 against the gear plate portions 23 and 24.

[0100] On the other hand, after the claw control member 60 is inserted between the gear plate portions 23 and 24 and positioned, the gear plate portions 23 and 24 are assembled between the side wall portions 13 and 14. Then, the main support shaft 70 is passed through the second bearing hole 16 of the first member 10, the shaft hole 25 of the second member, and the shaft hole 62 of the claw control member 60.

[0101] Next, the two ends of the auxiliary support shaft 50 and the main support shaft 70 are fixed by riveting to complete the assembly operation ( Figure 6 as well as Figure 7 ). Therefore, the claw control member 60 is clamped by the two gear plate portions 23 and 24 at a predetermined pressure. As a result, the claw control member 60 rotates together with the rotation of the second member 20.

[0102] Next, a method of using the angle adjustment fitting according to the first embodiment will be described.

[0103] As the initial state Figures 6 to 9 As shown in FIG. 1 , the bottom surface of the first component 10 and the bottom surface of the second component 20 are in abutment with each other, so the second component 20 cannot rotate in the clockwise direction. At this time, the claw component 30 is urged in the counterclockwise direction by the elastic force of the spring component 40, and the tooth surface 35 meshes with the gear portion 26. In addition, the limit surface 66 of the claw control component 60 abuts against the bottom surface of the inner side of the first component 10.

[0104] like Fig.10 As shown in the figure, if it is pulled up in the counterclockwise direction (arrow A), the gear portion 26 passes over the claw portion of the tooth surface 35 of the claw member step by step, and a rattling sound is generated. At this time, although the claw control member 60 wants to rotate along with the rotation of the second member 20, the limiting surface 66 of the claw control member 60 abuts against the bottom surface of the first member 10 and is limited, so that only the second member 20 rotates.

[0105] Next, the second member 20 is pulled up to a desired angle, as shown in FIG. Fig.11As shown, if the second member 20 is subjected to a load in the clockwise direction (arrow B), the gear portion 26 of the second member 20 meshes with the tooth surface 35 of the claw member 30. As a result, the second member 20 cannot rotate in the clockwise direction (arrow B), and the second member 20 is maintained at a desired angle.

[0106] like Fig.12 As shown in FIG. 1 , if the second member 20 is further rotated in the counterclockwise direction (arrow A) and pulled up to be vertical, the arc surface 27 continuous with the gear portion 26 abuts against the tooth surface 35 of the claw member 30. As a result, the claw member 30 resists the elastic force of the spring member 40 and rotates in the clockwise direction (arrow B) around the auxiliary support shaft 50 and is pressed down. As a result, the tooth surface 35 moves onto the arc surface 27 (refer to FIG. 1 ). Fig.13 At this time, the limiting surface 66 of the claw control member 60 remains in contact with the bottom surface of the first member 10 , and the claw control member 60 does not rotate together with the second member 20 .

[0107] Then, if the second component 20 is pulled back in the clockwise direction (arrow B), the claw control component 60 rotates together with the second component 20. Therefore, the limiting surface 66 of the claw control component 60 is slightly lifted from the bottom surface of the first component 10, and the locking claw portion 36 of the claw component 30 is locked in the claw receiving portion 65 of the claw control component 60 (refer to Fig.14 As a result, the claw control member 60 is restricted, and even if the second member 20 rotates in the clockwise direction (arrow B), the claw control member 60 does not rotate together.

[0108] Furthermore, even if the second member 20 is further rotated in the clockwise direction (arrow B), the claw control member 60 continues to limit the claw member 30. Therefore, since the tooth surface 35 of the claw member 30 is not engaged with the gear portion 26 of the second member 20, the second member 20 can be rotated to the horizontal direction without generating a rattling sound (see FIG. Fig.16 ).

[0109] Then, when the second member 20 reaches the horizontal position, the bottom surface of the first member 10 and the bottom surface of the second member 20 are in contact with each other, and the second member 20 cannot be rotated further in the clockwise direction (arrow B).

[0110] It should be noted that, at this time, the stopper surface 66 of the claw control member 60 is located at a position slightly raised from the bottom surface of the first member 10 .

[0111] Next, if the second component 20 is rotated counterclockwise (arrow A) in the released state, the claw control component 60 rotates counterclockwise (arrow A) accordingly. Therefore, the stopper surface 66 abuts against the bottom surface of the first component 10 and is stopped. As a result, the locking claw portion 36 of the claw component 30 is disengaged from the claw receiving portion 65 of the claw control component 60 and becomes Fig. 9 The state shown in the figure can thereby adjust the second component 20 to a desired angle.

[0112] In addition, if the second member 20 is not laid down to a horizontal position, for example Fig.17 Turn counterclockwise (arrow A) as shown. Fig.15 As shown in the second component 20, the claw control component 60 rotates together with the second component 20. Therefore, the claw control component 60 also rotates in the counterclockwise direction (arrow A), and the limiting surface 66 of the claw control component 60 moves downward and abuts against the bottom surface of the first component 10 to be limited. As a result, the locking claw portion 36 of the claw component 30 disengages from the claw receiving portion 65 of the claw control component 60, and the claw component 30 rotates in the counterclockwise direction (arrow A) around the auxiliary support shaft 50 due to the elastic force of the spring component 40. Therefore, the tooth surface 35 of the claw component 30 meshes with the gear portion 26. As a result, as shown in FIG. Fig.18 As shown, after the second member 20 is rotated counterclockwise (arrow A) to a desired angle to adjust the angle, even if a load in the clockwise direction (arrow B) is applied to the second member 20, the rotation of the second member 20 is restricted.

[0113] Therefore, according to the present invention, when the backrest of the legless chair or the like is adjusted to a desired angle, the angle can be adjusted without laying the backrest down to a horizontal position. Therefore, there are the following advantages: for example, even when there is not enough space between the backrest of the legless chair or the like and the wall, such as a legless chair or a sofa installed next to a wall, the backrest can be adjusted to a desired angle, and a legless chair or the like that is easy to use can be obtained.

[0114] like Fig.19 as well as Fig.21 As shown, the second embodiment is substantially the same as the first embodiment described above, and is different in that the claw control member 60 is manufactured by joining and integrating two metal plates.

[0115] That is, in the present embodiment, the claw control member 60 is formed by joining and integrating two metal plates in which the ribs 63 are protruded by protrusion processing.

[0116] According to this embodiment, Fig. 20As shown, when the claw control member 60 is clamped by the two gear plate portions 23 and 24, the rib 63 is elastically deformed. As a result, errors in component size and assembly are absorbed by the elastic deformation of the rib 63. As a result, high dimensional accuracy and high assembly accuracy are not required for the structural components including the claw control member 60, so there is an advantage of easy manufacturing and assembly.

[0117] The other structures of this embodiment are the same as those of the first embodiment described above, and therefore the same parts are denoted by the same reference numerals and their description is omitted.

[0118] like Figures 22 to 37 As shown, the third embodiment is almost the same as the first embodiment described above, except that Fig.25 As shown, the claw control member body 61 of the claw control member 60 is provided with a second control unit 67 .

[0119] like Fig.26 As shown, the second control part 67 limits the claw control part 60 by making its limiting angle part 68 abut against the claw part body 31 of the claw part 30. Therefore, the outer dimensions of the second control part 67 are designed so that the limiting angle part 68 abuts against the claw part body 31 before the limiting surface 66 of the first control part 64 abuts against the bottom surface of the first part 10. Therefore, according to the present embodiment, the limiting surface 66 of the claw control part 60 does not abut against the bottom surface of the first part 10.

[0120] The other structures of this embodiment are almost the same as those of the first embodiment described above, and therefore the same parts are denoted by the same reference numerals and their description is omitted.

[0121] Next, a method of using the angle adjustment fitting according to the third embodiment will be described.

[0122] As the initial state Fig.26 as well as Fig. 27 As shown in FIG. 1 , since the bottom surface of the first component 10 and the bottom surface of the second component 20 are in contact with each other, the second component 20 cannot rotate in the clockwise direction. At this time, the claw component 30 is urged in the counterclockwise direction by the elastic force of the spring component 40, and the tooth surface 35 meshes with the gear portion 26. In addition, the limiting angle portion 68 of the claw control component 60 abuts against the claw component body 31 of the claw component 30.

[0123] like Fig.28 As shown in the figure, if it is pulled up in the counterclockwise direction (arrow A), the gear portion 26 passes over the claw portion of the tooth surface 35 of the claw member 30 step by step, and a rattling sound is generated. At this time, the claw control member 60 wants to rotate along with the rotation of the second member 20, but because the limiting angle portion 68 of the claw control member 60 abuts against the claw member body 31 and is limited, only the second member 20 rotates.

[0124] Next, when the second member 20 is pulled up to a desired angle and stopped, the tooth surface 35 of the claw member 30 meshes with the gear portion 26 of the second member 20. Fig.29 as well as Fig.30 As shown, even if a load is applied to the second member 20 in the clockwise direction (arrow B), the second member 20 cannot rotate in the clockwise direction (arrow B) and is maintained at a desired angle.

[0125] It should be noted that Fig.29 , the state in which the first end portion 41 of the spring member 40 abuts against the inner peripheral surface of the first member is also shown.

[0126] Furthermore, if Fig.31 As shown, if the second component 20 is rotated in the counterclockwise direction (arrow A) and pulled up to a vertical position, the arc surface 27 continuous with the gear portion 26 abuts against the tooth surface 35 of the claw component 30. Therefore, the claw component 30 resists the elastic force of the spring component 40 and rotates clockwise around the auxiliary support shaft 50 and is pressed down. As a result, the tooth surface 35 begins to move onto the arc surface 27. At this time, the limiting angle portion 68 of the claw control component 60 is in a state of abutting against the claw component body 31 and does not rotate with the second component 20, and the limiting surface 66 is in a state of being lifted from the bottom surface of the first component 10. Furthermore, if the second component 20 is rotated in the counterclockwise direction (arrow A), as shown Fig.32 As shown in FIG. 2 , the stopper rib 22a of the second member 20 abuts against the second control portion 67, and the second member 20 itself is stopped. Fig.32 The two circles drawn with dotted lines in FIG. 1 show the abutting portions.

[0127] According to the present embodiment, there is an advantage that the turning operation of the second member 20 can be suppressed to a minimum, and an angle adjustment accessory that is easy to use can be obtained.

[0128] It should be noted that the limiting rib 22a may be provided as required, and the rotation angle of the second member 20 may be adjusted by adjusting its outer dimensions.

[0129] Then, if the second member 20 is pulled back in the clockwise direction (arrow B), the claw control member 60 rotates together with the second member 20. As a result, the limiting angle portion 68 of the claw control member 60 is separated from the claw member body 31, and the locking claw portion 36 of the claw member 30 is locked in the claw receiving portion 65 of the claw control member 60, and the claw control member 60 is limited (refer to Fig.33 ). The result is, Fig.34 As shown, even if the second member 20 rotates in the clockwise direction (arrow B), the claw control member 60 does not rotate together with the second member 20 .

[0130] Furthermore, even if the second member 20 continues to rotate in the clockwise direction (arrow B), the claw control member 60 will continue to limit the claw member 30. As a result, since the tooth surface 35 of the claw member 30 is not engaged with the gear portion 26 of the second member 20, the second member 20 can be rotated to the horizontal position without making a rattling sound (see FIG. Fig.35 ).

[0131] Then, when the second member 20 is rotated to the horizontal position, the bottom surface of the first member 10 and the bottom surface of the second member 20 are in contact with each other, and the second member 20 cannot be rotated further in the clockwise direction (arrow B).

[0132] It should be noted that at this time, the stopper corner portion 68 of the claw control member 60 is located at a position separated from the claw member body 31. In addition, the stopper surface 66 of the claw control member 60 is slightly lifted from the bottom surface of the first member 10.

[0133] Next, if the second component 20 is rotated counterclockwise (arrow A) in the released state, the claw control component 60 rotates counterclockwise (arrow A) accordingly. Therefore, the limiting angle portion 68 abuts against the claw component body 31 and is limited, and cannot rotate together. As a result, the locking claw portion 36 of the claw component 30 is separated from the claw receiving portion 65 of the claw control component 60, and the claw control component 60 is formed again. Fig.30 The state shown in the figure can thereby adjust the second component 20 to a desired angle.

[0134] In addition, if the second member 20 is not laid down to a horizontal position, for example Fig.36 As shown, the second component 20 is Fig.34 If the position shown in FIG. 1 is rotated counterclockwise (arrow A), the limiting angle portion 68 of the claw control member 60 abuts against the claw member body 31 and is limited. Therefore, the claw control member 60 cannot rotate together, and the locking claw portion 36 of the claw member 30 is separated from the claw receiving portion 65. As a result, the claw member 30 rotates counterclockwise around the auxiliary support shaft 50 due to the elastic force of the spring member 40, and the tooth surface 35 of the claw member 30 meshes with the gear portion 26. Therefore, if Fig.37 As shown, after the second member 20 is rotated counterclockwise (arrow A) to a desired angle to adjust the angle, even if a load in the clockwise direction (arrow B) is applied to the second member 20, the rotation of the second member 20 is restricted.

[0135] Therefore, in this embodiment, when the backrest of the legless chair is adjusted to a desired angle, the angle of the backrest can be adjusted without laying the backrest down to a horizontal position. This has the advantage that, for example, even when there is not enough space between the backrest of the legless chair and the wall, such as a legless chair or sofa installed next to a wall, a legless chair or the like can be obtained, which is easy to use and can adjust the backrest to a desired angle.

[0136] Furthermore, in the present embodiment, the position-limiting corner portion 68 of the claw control member 60 is brought into contact with the claw member body 31 of the claw member 30, thereby limiting the position of the claw control member 60. The claw member 30 is rotatably supported by the auxiliary support shaft 50 that passes through the first bearing hole 15 of the first member 10. Moreover, the dimensional accuracy of the distance between the fulcrums of the first bearing hole 15 and the second bearing hole 16 is high. Therefore, according to the present embodiment, there is an advantage that an angle adjustment accessory can be obtained in which the fluctuation of the action characteristics is small because the assembly error between the claw member 30 and the claw control member 60 is small.

[0137] like Fig.38 as well as Fig.39 As shown in FIG. 1 , the fourth embodiment is almost the same as the above-mentioned embodiment, except that a step 26a is provided on the gear plate portions 23 and 24 when processing the gear portion 26. This is to prevent burrs generated in the plate thickness direction during processing from contacting the inner surfaces of the gear plate portions 23 and 24. Therefore, there is an advantage that the operation step for removing the burrs can be omitted.

[0138] Furthermore, compared with the above-described embodiment, by making the outward surface of the control receiving portion 34 of the claw member substantially straight, there is an advantage of being easy to design and manufacture.

[0139] The other structures of this embodiment are almost the same as those of the third embodiment described above, and therefore the same parts are denoted by the same reference numerals and their description is omitted.

[0140] like Figures 40 to 45 As shown, the fifth embodiment is almost the same as the above-mentioned embodiment, except that the claw member 30 is formed by joining two split pieces 30a and 30b. In order to ensure a space for installing the spring member 40, the split pieces 30a and 30b are respectively provided with step portions 37 and 37, and the spring member 40 is formed by bending a linear spring material.

[0141] The claw member 30 of this embodiment can be manufactured from a thinner metal plate than the above-mentioned embodiment, and therefore can be manufactured easily and inexpensively.

[0142] Furthermore, the split pieces 30a and 30b can respectively follow and engage with the corresponding gear parts 26 and 26. Therefore, there is an advantage that even if the dimensional accuracy and positioning accuracy of the gear parts 26 and 26 vary, so-called one-sided contact can be avoided.

[0143] The other structures of this embodiment are almost the same as those of the above-mentioned embodiment, and therefore, the same parts are denoted by the same reference numerals and the description thereof is omitted.

[0144] Industrial Applicability

[0145] The angle adjustment accessory involved in the present invention is not limited to being applied to legless chairs and sofas, but is also applicable to other furniture.

[0146] In the above-mentioned embodiment, the case where a part of the claw control member 60 is abutted against the bottom surface of the first member 10 or the claw member body 31 for positioning is described. However, this is not limited to this, and of course, a part of the claw control member 60 may be abutted against other parts in the first member 10 for positioning.

[0147] Explanation of symbols

[0148] 10 Part 1

[0149] 11 Installation

[0150] 12 Rotating receiving part

[0151] 13 Side wall

[0152] 14 Side wall

[0153] 15 No. 1 bearing hole

[0154] 16 2nd bearing hole

[0155] 20 Part 2

[0156] 21 Installation

[0157] 22 Rotating part

[0158] 22a Limiting rib

[0159] 23 Gear plate

[0160] 24 Gear plate

[0161] 25 Shaft hole

[0162] 26 Gear

[0163] 27 Arc face

[0164] 27a Steps

[0165] 30 claw parts

[0166] 30a Split piece

[0167] 30b Split piece

[0168] 31 Claw component body

[0169] 32 Shaft hole

[0170] 33 Ribs

[0171] 34 Control acceptance department

[0172] 35 tooth surface

[0173] 36 Locking claw

[0174] 37 Steps

[0175] 40 Spring components

[0176] 41 1st end

[0177] 42 2nd end

[0178] 50 Auxiliary support shaft

[0179] 60 claw control parts

[0180] 61 Claw control unit body

[0181] 62 Shaft hole

[0182] 63 Ribs

[0183] 64 1st Control Unit

[0184] 65 claw receiving part

[0185] 66 Limiting surface

[0186] 67 Second Control Unit

[0187] 68 limit corner

[0188] 70 Main support shaft.

Claims

1. An angle adjustment accessory, characterized in that: The angle adjustment accessories include: A first component (10), the first component (10) having a rotation receiving portion (12) having a pair of opposing side wall portions (13, 14), and a main support shaft (70) and a secondary support shaft (50) passing through the rotation receiving portion (12) in parallel at a specified interval; a second component (20), the second component (20) having a rotating portion (22) having a gear portion (26) and a circular arc surface portion (27) continuous with the gear portion (26), the second component (20) being arranged between the side wall portions (13, 14) of the first component (10) so as to be supported so as to be rotatable about the main support shaft (70); A claw member (30), wherein a tooth surface (35) formed by a plurality of claws arranged in a row is provided on an inner surface of a control receiving portion (34) extending from a claw member body (31), and the claw member (30) is rotatably supported by a secondary support shaft (50) of the first member (10); a spring component (40) installed in the first component (10) and applying a force to rotate the claw component (30) toward the second component (20); and A claw control member (60), the claw control member (60) having a first control portion (64) extending from a claw control member body (61), the claw control member (60) being rotatably supported by a main support shaft (70) and being rotatable together with the second member (20), When the second component (20) is rotated in the relative folding direction, the claw control component (60) is limited so as not to rotate together with the second component (20), and the tooth surface (35) of the claw component (30) moves onto the arc surface (27) of the rotating part (22), thereby releasing the meshing state between the gear part (26) of the second component (20) and the tooth surface (35) of the claw component (30). Next, while the second member (20) is being rotated in the relative unfolding direction, the first control unit (64) of the claw control member (60) rotating together with the second member (20) limits the position of the claw member (30), so that the tooth surface (35) of the claw member (30) is limited so as not to mesh with the gear portion (26) of the second member (20). On the other hand, by further rotating the second component (20) by a specified small angle in the relative folding direction, the claw control component (60) rotating together with the second component (20) is limited, and the limit of the claw component (30) by the claw control component (60) is released, thereby making the tooth surface (35) of the claw component (30) mesh with the gear portion (26) of the second component (20), thereby limiting the rotation of the second component (20) in the relative unfolding direction. The claw control member (60) itself is limited by causing a second control portion (67) extending from a claw control member body (61) of the claw control member (60) to abut against a claw member body (31) of the claw member (30). The second component (20) itself is limited by causing the limiting rib (22a) of the second component (20) to abut against the second control portion (67) abutting against the claw component body (31) of the claw component (30).

2. The angle adjustment accessory according to claim 1, characterized in that: The claw control component (60) itself is limited by causing a first control portion (64) extending from a claw control component body (61) of the claw control component (60) to abut against a bottom surface of a first component (10).

3. The angle adjustment accessory according to claim 1 or 2, characterized in that: The claw member (30) is formed by joining two metal plates.

4. The angle adjustment accessory according to claim 1 or 2, characterized in that: Annular ribs (63) are respectively provided on the opening edge portions of the shaft hole (62) of the claw control component (60).

5. The angle adjustment accessory according to claim 1 or 2, characterized in that: The claw control member (60) is formed by joining and integrating two metal plates having an annular rib (63) formed by press working.

6. The angle adjustment accessory according to claim 1 or 2, characterized in that: The spring member (40) is formed by bending a wire-shaped spring material.

7. The angle adjustment accessory according to claim 1 or 2, characterized in that: The spring member (40) is formed of a leaf spring.

8. The angle adjustment accessory according to claim 1 or 2, characterized in that: The gear portion (26) is provided with a step (26a) located further inward than the arc surface portion in the plate thickness direction.

9. A legless chair, characterized in that: An angle adjustment accessory as claimed in any one of claims 1 to 8 is used.

10. A sofa, characterized in that: An angle adjustment accessory as claimed in any one of claims 1 to 8 is used.

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