A multifunctional sofa chair

Abstract

The utility model provides a multifunctional sofa chair, including the back cushion part, the seat cushion part, the leg cushion part, the tail cushion part who connects deformation support in turn, multifunctional sofa chair, deformation support has a plurality of movable self -locking joint, makes multifunctional sofa chair can at least be formed into first form, second form and third form, makes user can lie, sit and lie and sit, the utility model discloses a multifunctional sofa chair through the back cushion part, the seat cushion part, the leg cushion part and the tail cushion part connect deformation support, and sets up a plurality of movable self -locking joint on deformation support to multifunctional sofa chair can form at least three kinds of use form, and further makes user can adopt lie, sit and lie and sit's posture and rests on multifunctional sofa chair, provides more comfortable rest experience for user.

Description

Technical Field

[0001] This utility model relates to the field of seating, specifically to a multifunctional sofa chair. Background Technology

[0002] Chairs are the most common tool people use for rest and sitting. Common chairs are usually of a fixed shape and cannot be deformed into different shapes to allow users to rest in different postures, such as lying flat or sitting up.

[0003] Therefore, there is a need to provide a multifunctional sofa chair that can transform. Summary of the Invention

[0004] To achieve the above objectives, this utility model provides the following technical solution: A multifunctional sofa chair includes a backrest 1, a seat cushion 2, a leg cushion 3, and a tail cushion 4 arranged in sequence; it also includes a transforming frame 7, with the backrest 1, seat cushion 2, leg cushion 3, and tail cushion 4 all connected to the transforming frame 7; the multifunctional sofa chair allows the user to recline, sit, and sit in a reclining position; the transforming frame 7 has several movable self-locking joints 71, which are arranged in pairs between the backrest 1, seat cushion 2, leg cushion 3, and tail cushion 4, thereby enabling the multifunctional sofa chair to transform into various forms; the various forms... The system includes at least a first configuration in which the backrest portion 1, the seat cushion portion 2, the leg pad portion 3, and the tail pad portion 4 are located on the same straight line or nearly on the same straight line; a second configuration in which the backrest portion 1 is set at an angle to the seat cushion portion 2, and the seat cushion portion 2, the leg pad portion 3, and the tail pad portion 4 are located on the same straight line or nearly on the same straight line; and a third configuration in which the backrest portion 1 is set at an angle to the seat cushion portion 2, the leg pad portion 3 is set at an angle to the seat cushion portion 2 and the tail pad portion 4 respectively, and the tail pad portion 4 is suspended above the seat cushion portion 2, thereby forming a chair / table for supporting items or a person.

[0005] Furthermore, it also includes an armrest 6; the armrest 6 is rotatably connected to the backrest 1 or the seat cushion 2, or the armrest 6 is connected to the deformable bracket 7 and is arranged adjacent to the backrest 1 or the seat cushion 2, and the self-locking joint 71 is provided at the position of the deformable bracket 7 corresponding to the position between the backrest 1 and the armrest 6, or corresponding to the position between the seat cushion 2 and the armrest 6.

[0006] Furthermore, the handrail portion 6 includes a middle handrail 61 and a terminal handrail 62; both the middle handrail 61 and the terminal handrail 62 are connected to the deformable bracket 7; at least one self-locking joint 71 is provided on the deformable bracket 7 at a position corresponding to the middle handrail 61 and the terminal handrail 62, thereby enabling the handrail portion 6 to have a first handrail state in which the middle handrail 61 and the terminal handrail 62 are arranged at an angle, and a second handrail state in which the middle handrail 61 and the terminal handrail 62 are in contact.

[0007] Furthermore, it also includes a support foot 8, which is adapted to raise the working height of the seat cushion 2; the support foot 8 is rotatably connected to the deformable bracket 7 or rotatably connected to the seat cushion 2.

[0008] Furthermore, one end of the support leg 8 is hinged to the deformable bracket 7 via a pivot 10; it also includes a damping mechanism 9; the damping mechanism 9 includes a first connecting piece 91 and a second connecting piece 92, the first connecting piece 91 and the second connecting piece 92 are damped rotatably connected; the first connecting piece 91 is fixed to the deformable bracket 7, and the second connecting piece 92 is fixed to the support leg 8.

[0009] Furthermore, the length of the backrest portion 1 is less than or equal to the length of the seat cushion portion 2, or the self-locking joint 71 is provided on the deformable bracket 7 corresponding to the lower middle section of the backrest portion 1; it also includes a fourth form in which the leg pad portion 3 is set at an angle to the seat cushion portion 2 and the tail pad portion 4 respectively, and the tail pad portion 4 is suspended above the seat cushion portion 2, and the backrest portion 1 is partially located between the seat cushion portion 2 and the tail pad portion 4.

[0010] Furthermore, it also includes a headrest portion 5; the headrest portion 5 is rotatably connected to the end of the backrest portion 1 away from the seat cushion portion 2, or the headrest portion 5 is connected to the deformable bracket 7 and is arranged adjacent to the backrest portion 1, and the deformable bracket 7 is provided with the self-locking joint 71 at the position corresponding to the backrest portion 1 and the headrest portion 5; the length of the headrest portion 5 is less than the length of the backrest portion 1.

[0011] Furthermore, the tail pad portion 4 has an arc-shaped notch 41; elbow support portions 42 are provided on both sides of the tail pad portion 4, corresponding to the two sides of the arc-shaped notch 41.

[0012] Furthermore, the self-locking joint 71 includes a seat assembly 711, a fixed shaft 715, an inner disc 712, an elastic element 714, and a limiting block 713; the inner disc 712 is rotatably connected to the seat assembly 711 via the fixed shaft 715; a movable groove 7111 is formed in the seat assembly 711, and the limiting block 713 is disposed in the movable groove 7111; a plurality of first limiting teeth 7121 arranged in an arc shape are provided at one end of the inner disc 712 near the seat assembly 711; a plurality of second limiting teeth 7131 adapted to engage the first limiting teeth 7121 are provided on the limiting block 713; the elastic element 714 connects the seat assembly 711 and the limiting block 713 respectively, and the elastic element 714 is adapted to make the limiting block 713 have a tendency to move toward the inner disc 712.

[0013] Furthermore, the movable groove 7111 is generally shaped like a tiger's tooth, with a pointed top and a wider bottom. The side shape of the limiting block 713 is adapted to the shape of the movable groove 7111. The width of the top side of the limiting block 713 is equal to or slightly smaller than the width of the tip of the movable groove 7111. A pressing surface 7113 is provided at the top of the movable groove 7111, which is suitable for guiding the second limiting tooth 7131 to move towards the first limiting tooth 7121 and then engage. A set of opposing limiting surfaces 7112 is provided at the wide end of the movable groove 7111, and the bottom of the limiting block 713 can be engaged with the two limiting surfaces. Between the two limiting surfaces 7112, and when the limiting block 713 is engaged between the two limiting surfaces 7112, the first limiting tooth 7121 and the second limiting tooth 7131 do not interfere with each other at all; a push-in block 7122 is provided at the upper end of the first limiting tooth 7121, which is suitable for pushing the limiting block 713 to be engaged between the two limiting surfaces 7112; a push-out block 7123 is provided at the lower end of the first limiting tooth 7121, which is suitable for pushing the limiting block 713 out of the two limiting surfaces 7112; both the push-in block 7122 and the push-out block 7123 are higher than the first limiting tooth 7121.

[0014] This utility model discloses a multifunctional sofa chair that connects the backrest, seat cushion, leg cushion, and tail cushion to a deformable support frame, and sets several movable self-locking joints on the deformable support frame, so that the multifunctional sofa chair can form at least three usage modes, allowing users to rest in lying, sitting, and reclining positions, providing users with a more comfortable resting experience. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural schematic diagram of a multifunctional sofa chair in the first state, as disclosed in Embodiment 1 of this utility model.

[0017] Figure 2 This is a structural diagram of the multifunctional sofa chair in the second state and the armrest in the first armrest state, as shown in Embodiment 1.

[0018] Figure 3 This is a structural diagram of the multifunctional sofa chair in the third state and the armrest in the second armrest state, as shown in Embodiment 1.

[0019] Figure 4 This is a structural diagram of the multifunctional sofa chair in the fourth state of Embodiment 1.

[0020] Figure 5 for Figure 4 A structural diagram from another perspective.

[0021] Figure 6 This is a schematic diagram of the deformable support frame of a multifunctional sofa chair in its first state.

[0022] Figure 7 This is a schematic diagram of the structure of the deformable support frame of the multifunctional sofa chair in its second state.

[0023] Figure 8 for Figure 7 A structural diagram from another perspective.

[0024] Figure 9 for Figure 8 A schematic diagram of the structure in an explosion.

[0025] Figure 10 This is a schematic diagram of the deformable support frame of a multifunctional sofa chair in its third state.

[0026] Figure 11 This is a schematic diagram of the structure of the deformable support frame of the multifunctional sofa chair in its fourth state.

[0027] Figure 12 This is a schematic diagram of the damping mechanism.

[0028] Figure 13 This is a schematic diagram of a self-locking joint.

[0029] Figure 14 for Figure 13 A schematic diagram of the structure in an explosion.

[0030] Figure 15 This is a schematic diagram of the self-locking joint in the locked state.

[0031] Figure 16 for Figure 15 A schematic diagram of the vertical cross-section of the structure along its length.

[0032] Figure 17 This is a schematic diagram of the self-locking joint in the semi-locked state.

[0033] Figure 18 for Figure 17 A schematic diagram of the vertical cross-section of the structure along its length.

[0034] Figure 19 This is a schematic diagram of the self-locking joint in the unlocked state.

[0035] Figure 20 This is a structural diagram of the base kit.

[0036] Explanation of reference numerals in the attached figures: 1. Backrest area; 2. Seat cushion area; 3. Leg pads; 4. Tail pad part; 41. Arc-shaped notch; 42. Elbow support; 5. Head pad area; 6. Handrails; 61. Mid-section handrail; 62. End handrail; 7. Deformable support; 71. Self-locking joint; 711, Seat assembly; 7110, Outer plate; 7111, Movable groove; 7112, Limiting surface; 7113, Pressing surface; 7114. Second external rod; 7115. Mounting cavity; 712. Inner disc component; 7121. First limiting tooth; 7122. Push-in block; 7123. Push-out block; 713, Limiting block; 7131, Second limiting tooth; 714. Elastic components; 715. Fixed shaft; 72. Bone rod; 8. Support legs; 9. Damping mechanism; 91. First connecting piece; 92. Second connecting piece; 10. Shaft. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings. It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this invention, and should not be construed as limiting this invention.

[0038] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature; "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] Terms such as “installation,” “connection,” “linking,” and “fixing” should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components, unless otherwise explicitly defined.

[0040] Terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These are used solely for the purpose of describing the technical solutions of this invention and do not imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. For example, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium; "above," "on top," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature; "below," "under," and "below" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0042] This invention provides a multifunctional sofa chair, comprising a backrest 1, a seat cushion 2, a leg cushion 3, and a tail cushion 4 arranged in sequence; it also includes a deformable support 7, with the backrest 1, seat cushion 2, leg cushion 3, and tail cushion 4 all connected to the deformable support 7; the multifunctional sofa chair allows the user to lie down, sit, and recline; the deformable support 7 has several movable self-locking joints 71, which are arranged in pairs between the backrest 1, seat cushion 2, leg cushion 3, and tail cushion 4, thereby enabling the multifunctional sofa chair to transform into various forms.

[0043] The multiple forms include at least the first form, in which the backrest 1, seat cushion 2, leg cushion 3, and tail cushion 4 are located in a straight line or nearly in a straight line, allowing the user to rest in a lying position. In the second form, the backrest 1 and the seat cushion 2 are set at an angle, and the seat cushion 2, leg cushion 3, and tail cushion 4 are located on the same straight line or nearly on the same straight line. The second form allows users to rest in a reclining position. In the third form, the backrest 1 and the seat cushion 2 are set at an angle, and the leg cushion 3 is set at an angle to the seat cushion 2 and the tail cushion 4 respectively. The tail cushion 4 is suspended above the seat cushion 2, thus forming a chair table for supporting items or people. The third state allows users to adopt common sitting postures, including sitting upright to rest. At the same time, the tail cushion 4 can be used as a chest rest or elbow rest, and can also be used as a small table to place study materials or electronic products, so as to read, write, study or work.

[0044] The multifunctional sofa chair of the present invention, by setting a deformable support 7, enables the sofa chair to change into at least three usage states, allowing users to adopt different postures to rest according to their personal preferences or different scenarios, greatly improving product comfort and user experience.

[0045] The connection between the backrest part 1, seat cushion part 2, leg cushion part 3, tail cushion part 4 and the deformable bracket 7 is preferably a fixed connection. It can be fixed to the deformable bracket 7 by tie ropes sewn on each cushion part, or by buckles, or by adhesive, or as in embodiment one, by inserting the deformable bracket 7 into the inside of each cushion part.

[0046] The following embodiment of the multifunctional sofa chair has four forms, and the deformable bracket 7 is inserted and fixed inside the backrest part 1, seat cushion part 2, leg cushion part 3, and tail cushion part 4 as an example. Example

[0047] like Figure 1-20 The image shows a preferred embodiment of a multifunctional sofa chair provided by the present invention.

[0048] The aforementioned backrest 1, seat cushion 2, leg pad 3, and tail pad 4 are arranged sequentially. They can be distributed in pairs without being connected, or they can be distributed in pairs with only surface contact. Alternatively, as in this embodiment, they can be fixedly connected in pairs. Specifically, the backrest 1 is fixedly connected to the seat cushion 2, the seat cushion 2 is fixedly connected to the leg pad 3, and the leg pad 3 is fixedly connected to the tail pad 4. In some embodiments, the backrest 1, seat cushion 2, leg pad 3, and tail pad 4 are integrally formed, and the different functional pads are distinguished by the movable self-locking joint 71 of the deformable bracket 7.

[0049] Furthermore, it also includes armrests 6, one of the purposes of which is to provide support for the user's hand placement when sitting or lying down.

[0050] The armrest 6 is rotatable, which makes it easy to store or adjust to different angles for support. Specifically, it is rotatably connected to the backrest 1 or the seat cushion 2, or the armrest 6 is connected to the deformable bracket 7, which is adjacent to the backrest 1 or the seat cushion 2, and a self-locking joint 71 is provided at the position of the deformable bracket 7 between the backrest 1 and the armrest 6, or between the seat cushion 2 and the armrest 6.

[0051] In this embodiment, the deformable bracket 7 passes through the interior of the armrest portion 6, and the armrest portion 6 and the seat cushion portion 2 are spaced apart; a self-locking joint 71 is provided between the deformable bracket 7 and the armrest portion 6 and the seat cushion portion 2.

[0052] Furthermore, the handrail portion 6 includes a middle handrail 61 and a terminal handrail 62; both the middle handrail 61 and the terminal handrail 62 are connected to the deformable bracket 7; at least one self-locking joint 71 is provided at the position of the deformable bracket 7 corresponding to the position between the middle handrail 61 and the terminal handrail 62, so that the handrail portion 6 has a first handrail state in which the middle handrail 61 and the terminal handrail 62 are set at an angle, and a second handrail state in which the middle handrail 61 and the terminal handrail 62 are fitted together.

[0053] In this embodiment, two self-locking joints 71 are provided between the middle handrail 61 and the end handrail 62 corresponding to the deformable bracket 7, so that when the handrail part 6 is in the second handrail state, that is, when it is stored, it will not be unable to fit completely due to the volume of the material itself, and the space occupied by the handrail part 6 can be further compressed.

[0054] Furthermore, it also includes a support foot 8; the support foot 8 is suitable for using the multi-functional sofa chair to suspend it above the ground, that is, to suspend the backrest 1, seat cushion 2, leg cushion 3, and tail cushion 4 above the ground; the support foot 8 is rotatably connected to the deformable bracket 7 or rotatably connected to the seat cushion 2.

[0055] The support leg 8 is preferably connected to the deformable bracket 7, thereby integrating the support components of the entire multifunctional sofa chair together, increasing structural strength and functional stability.

[0056] Furthermore, one end of the support leg 8 is hinged to the deformable bracket 7 via a pivot 10; it also includes a damping mechanism 9; the damping mechanism 9 includes a first connecting piece 91 and a second connecting piece 92, the first connecting piece 91 and the second connecting piece 92 are connected in a damped rotatable manner; the first connecting piece 91 is fixed to the deformable bracket 7, and the second connecting piece 92 is fixed to the support leg 8.

[0057] By setting up a damping mechanism 9, the included angle between the support leg 8 and the deformable bracket 7 can be maintained to a certain extent, thereby ensuring the stability of the product's function.

[0058] The included angle between the first connecting piece 91 and the second connecting piece 92 is in the range of 0-270 degrees. Specifically, a limiting plate is provided on both the first connecting piece 91 and the second connecting piece 92. The two limiting plates are fixedly connected to the first connecting piece 91 and the second connecting piece 92 at a 90-degree angle or close to 90 degrees, respectively, and preferably integrally formed.

[0059] Furthermore, the length of the backrest 1 is less than or equal to the length of the seat cushion 2, or a self-locking joint 71 is provided on the lower middle section of the deformable bracket 7 corresponding to the backrest 1; it also includes a fourth form, in which the leg pads 3 are set at an angle to the seat cushion 2 and the tail pad 4 respectively, and the tail pad 4 is suspended above the seat cushion 2, with the backrest 1 part located between the seat cushion 2 and the tail pad 4. The fourth form is a storage form, which makes the multifunctional sofa chair easy to store, transport or carry.

[0060] By setting the length of the backrest 1 to be less than the length of the seat cushion 2, or by further folding the backrest 1 to make the backrest 1 fit snugly against the seat cushion 2, the space occupied by the sofa chair can be reduced.

[0061] In this embodiment, preferably, a self-locking joint 71 is provided in the lower middle section of the deformable bracket 7 corresponding to the cushion portion 1, so that when changing to the fourth state, the cushion portion 1 can be partially located between the seat cushion portion 2 and the tail cushion portion 4, and this part of the cushion portion 1 can fit against the lower end surface of the tail cushion portion 4.

[0062] Furthermore, the length of the leg pad 3 is equal to or slightly greater than twice the thickness of the backrest 1. In this embodiment, a headrest 5 is also provided at the upper end of the backrest 1. The headrest 5 can rotate and fit against the backrest 1 through two sets of self-locking joints 71. In the fourth form, from top to bottom, the order is: tail pad 4, backrest 1, headrest 5, and seat cushion 2, and they fit together in pairs.

[0063] Furthermore, it also includes a headrest portion 5; the headrest portion 5 is rotatably connected to the end of the backrest portion 1 away from the seat cushion portion 2; or, the headrest portion 5 is connected to a deformable bracket 7, which is arranged adjacent to the backrest portion 1, and the deformable bracket 7 is provided with a self-locking joint 71 at the position between the backrest portion 1 and the headrest portion 5; the length of the headrest portion 5 is less than the length of the backrest portion 1.

[0064] In this embodiment, the deformable bracket 7 is inserted inside the head cushion 5, and two sets of self-locking joints 71 are provided at the position between the backrest 1 and the head cushion 5, so that the head cushion 5 can be folded to fit against the backrest 1.

[0065] Furthermore, the tail pad 4 has an arc-shaped notch 41; elbow supports 42 are provided on both sides of the tail pad 4, corresponding to the sides of the notch 41. By setting the arc-shaped notch 41, firstly, it can be used to avoid the user's torso, more closely conforming to the curve of the human body and reducing the probability of bumps and injuries; secondly, two elbow supports 42 can be naturally formed on both sides of the arc-shaped notch 41, providing the user with a position to support their elbows.

[0066] The deformable support 7 includes several bone rods 72 and several self-locking joints 71.

[0067] The self-locking joint 71 includes a seat assembly 711, a fixed shaft 715, an inner disc 712, an elastic element 714, and a limiting block 713.

[0068] The inner disc 712 is rotatably connected to the seat assembly 711 via a fixed shaft 715. After connection, the outer ends of the inner disc 712 and the seat assembly 711 are respectively connected to a bone rod 72, thereby allowing the two bone rods 72 to rotate. A movable groove 7111 is provided in the seat assembly 711, and a limiting block 713 is disposed in the movable groove 7111 and can move up and down and back and forth in the movable groove 7111, that is, move up and down in the direction shown in the figure, and move towards and away from the inner disc 712. The inner disc 712 is close to the seat assembly 711. One end is provided with a plurality of first limiting teeth 7121 arranged in an arc shape; the limiting block 713 is provided with a plurality of second limiting teeth 7131 adapted to engage the first limiting teeth 7121, and correspondingly, the plurality of second limiting teeth 7131 are also arranged in an arc shape; the elastic member 714 connects the seat assembly 711 and the limiting block 713 respectively, and is located behind the limiting block 713, that is, the limiting block 713 is located between the elastic member 714 and the inner disc 712, and the elastic member 714 is adapted to make the limiting block 713 have a tendency to move toward the inner disc 712.

[0069] The inner disc component 712 includes a first outer rod and a turntable, and the first limiting tooth 7121, the push-in block 7122 and the push-out block 7123 are all located on the edge of the turntable.

[0070] The seat assembly 711 includes a second external rod 7114 and a disc sleeve. The disc sleeve includes two outer disc plates 7110, the shape of which is slightly larger than that of the inner disc 712 and the turntable. An installation cavity 7115 is formed between the two outer disc plates 7110. The turntable of the inner disc 712 is rotatably disposed in the installation cavity 7115 via a fixed shaft 715.

[0071] Furthermore, the movable groove 7111 is shaped like a tiger's tooth, with a pointed top and a wide bottom. The side shape of the limiting block 713 is adapted to the shape of the movable groove 7111, also being tiger's teeth-shaped. The width of the top side of the limiting block 713 is equal to or slightly smaller than the width of the tip of the movable groove 7111. A pressing surface 7113 is provided at the top of the movable groove 7111 to guide the second limiting tooth 7131 to move towards the first limiting tooth 7121 and then engage. The pressing surface 7113 is preferably an inclined arc surface facing downwards. A set of opposing limiting surfaces 7112 is provided at the wide end of the movable groove 7111, and the bottom of the limiting block 713 can be engaged with the two limiting surfaces 711. Between 2, and when the limiting block 713 is engaged with the two limiting surfaces 7112, the first limiting tooth 7121 and the second limiting tooth 7131 do not interfere with each other at all; a push-in block 7122 is provided at the upper end of the first limiting tooth 7121, which is suitable for pushing the limiting block 713 to be engaged between the two limiting surfaces 7112; an ejection block 7123 is provided at the lower end of the first limiting tooth 7121, which is suitable for pushing the limiting block 713 out of the two limiting surfaces 7112; the push-in block 7122 and the ejection block 7123 are both higher than the first limiting tooth 7121, so that the push-in block 7122 and the ejection block 7123 are protruding and closer to the limiting block 713 than the first limiting tooth 7121.

[0072] Both the first limiting tooth 7121 and the second limiting tooth 7131 are involute teeth, preferably V-shaped teeth.

[0073] See Figure 13-20 The self-locking joint 71 has three states: locked state, in which the limiting block 713 is located at the top of the movable groove 7111. Due to the narrow width of the top and the presence of the pressing surface 7113, the first limiting tooth 7121 and the second limiting tooth 7131 are stably engaged. At this time, the inner disc 712 can only be rotated counterclockwise and not clockwise, thus locking the angle. In the semi-locked state, the limiting block 713 is located in the middle section of the movable groove 7111. The limiting block 713 has a certain range of motion in the direction of approaching and moving away from the inner disc 712. At this time, the first limiting tooth 7121 and the second limiting tooth 7131 are not stably meshed, and the inner disc 712 can be rotated clockwise or counterclockwise. In the unlocked state, the lower end of the limit block 713 is engaged with the two limit surfaces 7112. At this time, the first limit tooth 7121 and the second limit tooth 7131 are not engaged and do not interfere with each other. Because the inner disc 712 pushes the block 7122 against the limit block 713, the inner disc 712 can only be rotated clockwise.

[0074] The working principle is based on the initial state of engagement between the limit block 713 and the inner disc 712: If it is necessary to reduce the angle between the two pads, rotate the pad. At this time, the inner disc 712 rotates counterclockwise. The force of the user rotating the pad will act through the involute between the first limiting tooth 7121 and the second limiting tooth 7131. Under the action of the friction between the two, the limiting block 713 moves downward and overcomes the elastic force of the elastic member 714, moving from the locked state to the semi-locked state. As the external rotation continues, the meshing position of the two limiting teeth changes accordingly. After the desired angle is reached, rotate the corresponding pad in the opposite direction. At this time, under the action of the friction between the two limiting teeth, the limiting block 713 is driven to the top of the movable groove 7111. Since the width of the top of the movable groove 7111 is close to that of the limiting block 713, and under the action of the pressing surface 7113, it enters the locked state. The limiting block 713 will remain engaged with the inner disc 712, thereby achieving the purpose of locking the angle. When it is necessary to increase the angle between the two pads, the pads must first be rotated in the opposite direction to unlock the self-locking joint 71, then rotated in the opposite direction to enter the semi-unlocked state, and then the two pads are rotated to adjust to the desired angle. Specifically: First, rotate the block 7122 towards the direction of reducing the angle between the two pads until the push block 7122 pushes the limit block 713, so that the limit block 713 is engaged with the two limit surfaces 7112. At this time, the second limit tooth 7131 of the limit block 713 does not interfere with the first limit tooth 7121 of the inner disc 712. This process goes through the initial locked state, to the semi-locked state, and then to the fully unlocked state. Second, rotate in the opposite direction, that is, make the inner disc 712 rotate clockwise. After rotating for a certain distance, the push-out block 7123 below the inner disc 712 pushes the limiting block 713, causing the limiting block 713 to disengage from the two limiting surfaces 7112. At the same time as disengaging, the elastic member 714 pushes the limiting block 713 towards the inner disc 712, so that the first limiting tooth 7121 and the second limiting tooth 7131 mesh. At this time, it is in a semi-locked state. Then it can be adjusted to the desired angle, and then the angle can be locked through the aforementioned operation.

[0075] In some less effective embodiments, the elastic element 714 can be made of a highly elastic element that can achieve a certain degree of locking, thereby replacing the function provided by the shape of the aforementioned limiting block 713 and movable groove 7111.

[0076] Furthermore, the width of the leg pad 3 is smaller than the width of the tail pad 4, which can prevent fatigue caused by the legs being spread too wide for a long time and optimize the riding experience in the third state.

[0077] This utility model discloses a multifunctional sofa chair that connects the backrest, seat cushion, leg cushion, and tail cushion to a deformable support frame, and sets several movable self-locking joints on the deformable support frame, so that the multifunctional sofa chair can form at least three usage modes, allowing users to rest in lying, sitting, and reclining positions, providing users with a more comfortable resting experience.

[0078] The above embodiments only illustrate a portion of the implementation methods of the present invention. Any modifications, substitutions, and improvements made by those skilled in the art without departing from the inventive concept of the present invention, without creative effort, are all within the protection scope of the present invention.

Claims

1. A multifunctional sofa chair, characterized in that: It includes a backrest (1), a seat cushion (2), a leg cushion (3), and a tail cushion (4) arranged in sequence. It also includes a deformable bracket (7), wherein the backrest (1), the seat cushion (2), the leg pad (3), and the tail pad (4) are all connected to the deformable bracket (7); The multi-functional sofa chair is designed to allow users to lie down, sit, and recline. The deformable support (7) has several movable self-locking joints (71), and the several self-locking joints (71) are arranged in pairs between the backrest (1), the seat cushion (2), the leg pad (3), and the tail pad (4), so that the multifunctional sofa chair can be transformed into various forms; The multiple forms include at least the first form, wherein the backrest (1), the seat cushion (2), the leg cushion (3), and the tail cushion (4) are located on the same straight line or nearly on the same straight line; In the second form, the backrest (1) and the seat cushion (2) are set at an angle, and the seat cushion (2), the leg cushion (3), and the tail cushion (4) are located on the same straight line or close to the same straight line. In the third form, the backrest (1) is set at an angle to the seat cushion (2), the leg cushion (3) is set at an angle to the seat cushion (2) and the tail cushion (4) respectively, and the tail cushion (4) is suspended above the seat cushion (2), so that the tail cushion (4) forms a chair table for supporting items or people.

2. The multifunctional sofa chair according to claim 1, characterized in that, It also includes the armrests (6); The armrest (6) is rotatably connected to the backrest (1) or the seat cushion (2), or the armrest (6) is connected to the deformable bracket (7) and is arranged adjacent to the backrest (1) or the seat cushion (2), and the self-locking joint (71) is provided at the position of the deformable bracket (7) between the backrest (1) and the armrest (6) or between the seat cushion (2) and the armrest (6).

3. The multifunctional sofa chair according to claim 2, characterized in that, The handrail (6) includes a middle handrail (61) and a terminal handrail (62). Both the middle handrail (61) and the end handrail (62) are connected to the deformable bracket (7); At least one self-locking joint (71) is provided at the position between the middle handrail (61) and the end handrail (62) on the deformable bracket (7), so that the handrail part (6) has a first handrail state in which the middle handrail (61) and the end handrail (62) are set at an angle, and a second handrail state in which the middle handrail (61) and the end handrail (62) are in contact.

4. The multifunctional sofa chair according to claim 2, characterized in that, It also includes a support foot (8) which is adapted to raise the seat cushion (2) to a higher operating height; The support foot (8) is rotatably connected to the deformable bracket (7) or rotatably connected to the seat cushion (2).

5. The multifunctional sofa chair according to claim 4, characterized in that, One end of the support leg (8) is hinged to the deformable bracket (7) via a pivot (10); It also includes a damping mechanism (9); The damping mechanism (9) includes a first connecting piece (91) and a second connecting piece (92), wherein the first connecting piece (91) and the second connecting piece (92) are connected in a damped rotatable manner; The first connecting piece (91) is fixed to the deformable bracket (7), and the second connecting piece (92) is fixed to the support foot (8).

6. The multifunctional sofa chair according to any one of claims 1-5, characterized in that, The length of the backrest part (1) is less than or equal to the length of the seat cushion part (2), or the self-locking joint (71) is provided on the lower middle section of the backrest part (1) corresponding to the deformable bracket (7). It also includes a fourth form in which the leg pad (3) is set at an angle to the seat pad (2) and the tail pad (4), and the tail pad (4) is suspended above the seat pad (2), and the backrest (1) is located between the seat pad (2) and the tail pad (4).

7. The multifunctional sofa chair according to claim 6, characterized in that, It also includes the head pad (5); The headrest (5) is rotatably connected to the backrest (1) at one end away from the seat cushion (2), or the headrest (5) is connected to the deformable bracket (7) and is arranged adjacent to the backrest (1), and the deformable bracket (7) is provided with the self-locking joint (71) at the position between the backrest (1) and the headrest (5). The length of the headrest portion (5) is less than the length of the backrest portion (1).

8. The multifunctional sofa chair according to any one of claims 1-5 and 7, characterized in that, The tail pad (4) has an arc-shaped notch (41). Elbow supports (42) are provided on both sides of the tail pad (4), corresponding to the two sides of the arc-shaped notch (41).

9. The multifunctional sofa chair according to claim 8, characterized in that, The self-locking joint (71) includes a seat assembly (711), a fixed shaft (715), an inner disc (712), an elastic element (714), and a limiting block (713). The inner disc component (712) is rotatably connected to the seat assembly (711) via the fixed shaft (715); An active slot (7111) is provided in the seat assembly (711), and the limiting block (713) is disposed in the active slot (7111); A plurality of first limiting teeth (7121) are provided at one end of the inner disc (712) near the seat assembly (711) in an arc shape. The limiting block (713) is provided with a plurality of second limiting teeth (7131) suitable for meshing with the first limiting tooth (7121). The elastic element (714) connects the seat assembly (711) and the limiting block (713) respectively, and the elastic element (714) is adapted to give the limiting block (713) a tendency to move toward the inner disc (712).

10. The multifunctional sofa chair according to claim 9, characterized in that, The movable groove (7111) is generally shaped like a tiger's tooth, with a pointed top and a wide bottom. The side shape of the limiting block (713) is adapted to the shape of the movable groove (7111). The width of the top side of the limiting block (713) is equal to or slightly smaller than the width of the tip of the movable groove (7111); A pressing surface (7113) is provided at the top of the movable groove (7111), which is suitable for guiding the second limiting tooth (7131) to move toward the first limiting tooth (7121) and then engage; A set of opposing limiting surfaces (7112) is provided at the wide end of the movable groove (7111). The bottom of the limiting block (713) can be inserted between the two limiting surfaces (7112). When the limiting block (713) is inserted between the two limiting surfaces (7112), the first limiting tooth (7121) and the second limiting tooth (7131) do not interfere with each other at all. A push block (7122) is provided at the upper end of the first limiting tooth (7121), which is suitable for pushing the limiting block (713) into the space between the two limiting surfaces (7112); A push-out block (7123) is provided at the lower end of the first limiting tooth (7121), which is suitable for pushing the limiting block (713) out of the two limiting surfaces (7112); Both the push-in block (7122) and the push-out block (7123) are higher than the first limiting tooth (7121).

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