An adjustable sofa and method of adjusting the same

Abstract

The present application relates to the technical field of sofa, and discloses an adjustable sofa and a method for adjusting the same, which comprises a main frame, a backrest frame and an armrest frame, the backrest frame and the opposite armrest frame are used for surrounding a seating part above the main frame, and a driving mechanism is arranged in the main frame; a protection assembly is arranged at a position close to the front side in the main frame, when the backrest frame and the armrest frame are driven by the driving mechanism to be close to each other to surround a minimum seating part, the protection assembly is driven to extend above the main frame to surround the seating part; a lifting assembly is further arranged in the armrest frame, and when the protection assembly extends out of the main frame, the lifting assembly is driven to extend out of the armrest frame to adjust the height of the armrest frame. Through the arrangement of the backrest frame, the armrest frame and the driving mechanism, the driving mechanism can drive the relative movement between the backrest frame and the armrest frame, and then the size of the seating part can be adjusted, so that the sofa can be suitable for users with different body types, and the applicability is better.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sofa technology, in particular to an adjustable sofa and a method for adjusting the same. BACKGROUND

[0002] Sofa is one of the most commonly used seats, and is used by people for daily leisure and rest. With the continuous improvement of living quality, people have higher and higher requirements for the comfort and convenience of sofas.

[0003] An intelligent sofa disclosed in patent No. CN105996553B comprises a sofa seat, a sofa armrest and a sofa backrest, further comprises an infrared sensing unit, a control unit, and an execution unit arranged inside the sofa seat, the execution unit is preset with multiple execution states. Although the intelligent sofa uses infrared sensing technology, the user can control the rotation of the sofa backrest and / or the sofa extension seat relative to the sofa seat by waving hands, and adjust the intelligent sofa to a comfortable state for the user, but in actual use, the position of the sofa armrest is fixed, so that when users with different body types sit on the sofa, the sofa armrest cannot better support the user's arms, thereby affecting the comfort of the sofa. At the same time, most of such sofas are designed for adults, and the function is single. When infants climb onto the sofa, there is a lack of protection, and there is a risk of falling when the infant crawls on the sofa. SUMMARY

[0004] To solve the technical problems in the background art, the present application provides an adjustable sofa and a method for adjusting the same.

[0005] To achieve the above-mentioned purposes, the present application specifically adopts the following technical solutions:

[0006] An adjustable sofa comprises a main frame, a backrest frame and an opposite armrest frame, the backrest frame and the opposite armrest frame are used to enclose a seating part above the main frame, and the main frame is provided with a driving mechanism for driving the backrest frame and the armrest frame to move relative to each other to adjust the size of the seating part.

[0007] The main frame is provided with a protection assembly at a position close to the front side, the protection assembly can be accommodated in the main frame, and when the driving mechanism drives the backrest frame and the armrest frame to move close to each other to enclose the smallest seating part, the protection assembly is driven to extend above the main frame to surround the seating part.

[0008] The armrest frame is further provided with a lifting assembly, the protection assembly is used to drive the lifting assembly to extend out of the armrest frame to adjust the height of the armrest frame when the protection assembly extends out of the main frame, and the protection assembly is used to drive the lifting assembly to retract into the armrest frame when the protection assembly retracts into the main frame.

[0009] As preferred, the driving mechanism comprises a first mounting box arranged along the front-rear direction of the main frame and a second mounting box arranged perpendicularly to the first mounting box on both sides of the first mounting box, the first mounting box is internally provided with a first sliding cavity, the second mounting box is internally provided with a second sliding cavity, the first sliding cavity is internally provided with a first screw rod capable of rotating, the second sliding cavity is internally provided with a second screw rod capable of rotating and having one end extending into the first sliding cavity, the first screw rod is provided with a driving bevel gear, the second screw rod is provided with a driven bevel gear matched with the driving bevel gear; the first sliding cavity and the second sliding cavity are both provided with a sliding block, the first screw rod and the second screw rod are threadedly arranged through the corresponding sliding blocks, the backrest frame is arranged on the corresponding sliding block through a first support frame, the armrest frame is arranged on the corresponding sliding block through a second support frame, and the first screw rod is rotated to drive the backrest frame and the armrest frame to move close to or away from each other.

[0010] As preferred, the first mounting box is provided with a motor for driving the first screw rod to rotate.

[0011] As preferred, the protection assembly comprises a protection box, the protection box is internally provided with a protection cavity, the left and right side walls of the protection cavity are oppositely provided with a sliding groove along the height direction thereof, the protection cavity is internally provided with a protection frame capable of lifting, the left and right side walls of the protection frame are provided with a sliding block extending out of the corresponding sliding groove, the protection cavity is internally provided with a first spring at both left and right sides for driving the protection frame to extend out of the protection cavity, the protection cavity is internally provided with a locking member at the lower part for locking the protection frame in the protection cavity, and the sliding block in the first sliding cavity is provided with an unlocking member for unlocking the protection frame by the locking member.

[0012] As preferred, the locking member comprises a locking box, the locking box is internally provided with a locking cavity, the locking cavity is oppositely provided with a locking block having one end extending out of the corresponding end of the locking box through a second spring, the side surface of the locking block facing the backrest frame is provided with a groove, the groove is provided with a first inclined surface, the lower end of the protection frame is oppositely provided with a clamping block, and the clamping block is provided with a clamping groove for the one end of the corresponding locking block to extend into.

[0013] The unlocking member comprises an unlocking rod arranged on the lower end surface of the corresponding sliding block, the unlocking rod extends into the corresponding groove through the locking box for pressing the first inclined surface to drive the locking block to retract into the locking cavity.

[0014] As preferred, the armrest frame is internally provided with a lifting groove, the lifting assembly comprises a lifting frame capable of lifting in the lifting groove, the lifting groove is internally provided with an air bag at the lower part of the lifting frame for driving the lifting frame to lift and lower, and the side surface of the locking box facing the backrest frame is provided with a trigger assembly for driving the air bag to extend and retract.

[0015] As preferred, the trigger assembly comprises a trigger block arranged along the length direction of the locking box, the trigger block is provided with a first trigger slope at one end surface and at the lower side, and is provided with a second trigger slope at the other end surface and at the upper side, the lower side of the slider corresponding to the one end of the trigger block is provided with a first trigger rod, and the upper side of the slider corresponding to the other end of the trigger block is provided with a second trigger rod, the upward movement of the protective frame is used to drive the first trigger rod to extrude the first trigger slope to push the trigger block to move to the other end, and the downward movement of the protective frame is used to drive the second trigger rod to extrude the second trigger slope to push the trigger block to move to the one end.

[0016] As preferred, the outer side surface of the locking box is provided with a first trigger switch and a second trigger switch, the trigger block moving to the other end is used to trigger the first trigger switch to realize the inflation of the air bag, and the trigger block moving to the one end is used to trigger the second trigger switch to realize the deflation of the air bag.

[0017] The application further provides a sofa adjusting method, which adopts the adjustable sofa and specifically comprises the following steps.

[0018] S1, when the user is an adult, the user is seated on the seating part of the sofa, the motor is controlled to drive the first lead screw to rotate, the relative movement between the backrest frame and the armrest frame is driven, the size of the space between the seating parts is adjusted to be suitable for the size of the user, the backrest frame supports the back of the user, and the armrest frame can support the arms of the user;

[0019] S2, when the user is a baby, the guardian controls the motor to drive the first lead screw to rotate, the backrest frame is moved to the most front side of the main frame, the armrest frames are synchronously driven to move close to each other, and the smallest seating part is formed;

[0020] S3, in step S2, when the backrest frame is moved to the most front side of the main frame, the unlocking rod is inserted into the groove to drive the locking block to retract, the locking of the protective frame is released, the protective frame is extended under the action of the first spring, the protective frame can surround the seating part to form the enclosing space, and at this time, the guardian places the baby in the enclosing space;

[0021] S4, in step S3, during the process that the protective frame is extended into the protective box, during the process that the first trigger rod extrudes the first trigger slope to drive the trigger block to move to the other end, the trigger block triggers the first trigger switch, the air bag is inflated, the lifting frame is driven to extend, the height of the armrest frame is adjusted to be suitable for the backrest frame, and the protection effect of the enclosing space is improved;

[0022] S5, when the guardian is used to control the motor to drive the first lead screw to rotate, the unlocking rod is separated from the groove, the guardian is used to press the protective frame to retract into the protective box, the second trigger rod extrudes the second trigger slope to drive the trigger block to move to one end, the trigger block triggers the second trigger switch, the air bag is exhausted, the lifting frame is retracted, and the sofa is convenient for step S1.

[0023] In summary, the present application includes the following advantages;

[0024] 1、The backrest frame, the armrest frame and the driving mechanism are arranged, so that the driving mechanism can drive the relative movement between the backrest frame and the armrest frame, and then the size of the space of the seating part can be adjusted, so that the sofa can be suitable for users of different body types, and the applicability is better.

[0025] 2、The protective assembly is arranged, so that when the minimum seating part is formed between the backrest frame and the armrest frame, the protective assembly can be extended to surround the minimum seating part, so that a surrounding space is preferably formed, so that the sofa can protect the baby on it and prevent the baby from falling down by crawling.

[0026] 3、The lifting assembly is arranged, so that when the protective assembly is extended to form the surrounding space, the lifting assembly is driven to extend, the height of the armrest frame is adjusted to be adapted to the backrest frame, so that the protection effect of the surrounding space is improved, and the effect of preventing the baby from falling down by crawling is better. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structure schematic view of an adjustable sofa in the present application.

[0028] Figure 2 It is a structure schematic view of a driving mechanism in the present application.

[0029] Figure 3 It is a structure schematic view of a protective assembly in the present application.

[0030] Figure 4 It is a structure schematic view of a locking part in the present application.

[0031] Figure 5 It is a structure schematic view of an armrest frame in the present application.

[0032] Figure 6 It is a structure schematic view of cooperation between the protective frame and the locking part in the present application.

[0033] Figure 7 It is a structure schematic view of a backrest frame in the present application.

[0034] Figure 8 It is a structure schematic view of the sofa forming a surrounding space in the present application.

[0035] Explanation of reference signs:

[0036] 100, main frame; 110, backrest frame; 120, armrest frame; 130, protection assembly; 140, lifting assembly;

[0037] 200, first mounting box; 201, first sliding cavity; 202, first lead screw; 203, driving bevel gear; 204, mounting portion; 210, second mounting box; 211, second sliding cavity; 212, second lead screw; 213, driven bevel gear; 220, sliding block; 221, unlocking rod; 230, first support frame; 240, second support frame; 250, motor;

[0038] 300, protection box; 301, sliding groove; 310, protection frame; 311, sliding block; 312, first trigger rod; 313, second trigger rod; 320, trigger block; 321, first trigger inclined surface; 322, second trigger inclined surface; 330, first trigger switch; 340, second trigger switch;

[0039] 400, locking box; 401, locking cavity; 410, second spring; 420, locking block; 421, groove; 422, first inclined surface; 423, limiting ring; 424, second inclined surface; 430, blocking ring;

[0040] 511, lifting groove; 520, lifting frame; 530, air bag;

[0041] 611, clamping block; 612, clamping groove; 620, first spring;

[0042] 711, notch portion. DETAILED DESCRIPTION

[0043] For further understanding of this application, reference along with the drawings and embodiments will be made to the detailed description of this application. It should be understood that the embodiments are only used to explain this application but not to limit this application.

[0044] In the description of this application, it should be understood that the terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only used to facilitate the description of this application and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting this application.

[0045] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be interpreted in a broad sense, for example, "connected" can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be connected internally between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0046] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "several" is two or more, unless otherwise explicitly specified and limited.

[0047] The accompanying drawings are incorporated in and constitute a part of this specification and will be understood with reference thereto. Figures 1-8 The present application is further described in detail.

[0048] As shown in Figure 1 and Figure 8 , an adjustable sofa in the embodiment includes a main frame 100, a backrest frame 110 and an opposite arranged armrest frame 120, the main frame 100 is a main body frame for supporting a sofa seat (not shown in the figure), at the same time, an installation space for installing subsequent driving mechanisms, protection assemblies 130 and the like is formed in the main frame 100, and the sofa seat is the main force receiving part of the sofa. The sofa seat structure of the sofa generally has types such as rubber bandage, wooden flat plate and snake-shaped steel spring, and the sofa seat in the embodiment can adopt one of the above structures.

[0049] Among them, the backrest frame 110 is used to support the back of the user when the user sits on the sofa, and the armrest frame 120 is used to support the arms of the user when the user sits on the sofa, so as to improve the use experience of the sofa, therefore, the backrest frame 110 is arranged at the rear side of the main frame 100 along the left-right direction of the main frame 100, and the armrest frame 120 is arranged at the left and right sides of the main frame 100 along the front-rear direction of the main frame 100, thereby the backrest frame 110 and the opposite arranged armrest frame 120 form a seating part for surrounding a certain seating space on the sofa seat.

[0050] In actual use, in order to improve the comfort of the backrest frame 110 and the armrest frame 120, the backrest frame 110 and the armrest frame 120 are each covered with a medium density fiberboard, and the medium density fiberboard is padded with a sponge and a cotton cloth covered outside the two.

[0051] In the embodiment, the main frame 100 is provided with a driving mechanism for driving the backrest frame 110 and the armrest frame 120 to move relative to each other to adjust the size of the seating space;

[0052] In the embodiment, the driving mechanism is arranged to adjust the movement of the backrest frame 110 along the front-rear direction of the main frame 100 and the relative movement of the armrest frame 120 along the left-right direction of the main frame 100, i.e., the relative movement between the backrest frame 110 and the armrest frame 120, so that the size of the seating space is adjusted, the sofa can adapt to users of different body types, and the applicability is improved.

[0053] In combination with Figure 7 As shown in the figure, in the existing case, the height of the backrest frame 110 is higher than that of the armrest frame 120. In actual use, in order to improve the comfort of supporting the back of the user, the two sides of the backrest frame 110 are away from the left and right sides of the main frame 100 by a certain distance. At the same time, in order to avoid a large gap between the rear side wall of the armrest frame 120 and the backrest frame 110, which is easy to cause the baby sitting on the seating part to be clamped, the two sides of the backrest frame 110 and the lower side are provided with an opening part 711 for the corresponding armrest frame 120 to extend into, so as to reduce the gap between the two.

[0054] In combination with Figure 2As shown, in the embodiment, the driving mechanism comprises a first mounting box 200 arranged along the front-rear direction of the main frame 100 and a second mounting box 210 arranged perpendicularly to the first mounting box 200 and on both sides of the first mounting box 200. In actual use, the first mounting box 200 is arranged at the center of the main frame 100 and close to the rear half side, and the second mounting box 210 is arranged on the end of the first mounting box 200 close to the center of the main frame 100. In actual use, the corresponding ends of the first mounting box 200 and the second mounting box 210 extend outward to form mounting portions 204, and the mounting portions 204 are fixed to the corresponding side walls in the main frame 100 by screws; the first mounting box 200 is provided with a first sliding cavity 201, and the second mounting box 210 is provided with a second sliding cavity 211. The first sliding cavity 201 is provided with a first screw rod 202 that can rotate, and the second sliding cavity 211 is provided with a second screw rod 212 that can rotate and has one end extending into the first sliding cavity 201. The first screw rod 202 is provided with a driving bevel gear 203, and the second screw rod 212 is provided with a driven bevel gear 213 that cooperates with the driving bevel gear 203. The first sliding cavity 201 and the second sliding cavity 211 are both provided with sliding blocks 220, the first screw rod 202 and the second screw rod 212 are arranged through the corresponding sliding blocks 220 in a threaded manner, the backrest frame 110 is arranged on the corresponding sliding blocks 220 through a first support frame 230, the armrest frame 120 is arranged on the corresponding sliding blocks 220 through a second support frame 240, and the first screw rod 202 is rotated to drive the backrest frame 110 and the armrest frame 120 to move closer to or away from each other.

[0055] Through the structure in the embodiment, the driving bevel gear 203 and the driven bevel gear 213 are arranged in meshing, so that the rotation of the first screw rod 202 can drive the second screw rods 212 on both sides to rotate synchronously. Since the first screw rod 202 and the second screw rod 212 are arranged through the corresponding sliding blocks 220 in a threaded manner, when the first screw rod 202 is rotated to drive the backrest frame 110 to move towards the front side of the main frame 100, the armrest frames 120 on both sides are driven to move closer to each other, so that the space of the seating portion gradually decreases. When the first screw rod 202 is rotated to drive the backrest frame 110 to move towards the rear side of the main frame 100, the armrest frames 120 on both sides are driven to move away from each other, so that the space of the seating portion gradually increases.

[0056] In actual use, the backrest frame 110 is fixedly installed on the corresponding sliding block 220 through the first support frame 230, and the armrest frame 120 is fixedly installed on the corresponding sliding block 220 through the second support frame 240, wherein the first support frame 230 and the second support frame 240 are both in the shape of an I-beam. Due to the movement of the first support frame 230 and the second support frame 240, the sofa seat on the upper side of the main frame 100 is divided into three parts, and a gap is reserved between adjacent sofa seats for the movement of the first support frame 230 and the second support frame 240.

[0057] In the embodiment, in order to drive the first screw rod 202 to rotate, the first mounting box 200 is provided with a motor 250 near the end of the corresponding side wall of the main frame 100. The motor 250 is connected with a gear box, and the gear box is connected with one end of the first screw rod 202, so as to realize the forward and reverse rotation of the first screw rod 202 driven by the motor 250.

[0058] As shown in Figure 1 and Figure 8 In the embodiment, the main frame 100 is provided with a protection assembly 130 which can be accommodated in the main frame 100 and is located near the front side of the main frame 100. When the driving mechanism drives the backrest frame 110 and the armrest frame 120 to move close to each other to form the smallest seating part, the protection assembly 130 is driven to extend to the upper side of the main frame 100 to surround the seating part.

[0059] Through the structure in the embodiment, when the driving assembly drives the backrest frame 110 and the armrest frame 120 to move close to each other to form the smallest seating part, the protection assembly 130 extends to the upper side of the main frame 100 to surround the seating part, forming a surrounding space. At this time, the infant placed on the seating part is protected by using the surrounding space, so as to avoid the infant from falling down while crawling on the sofa, that is, the sofa has the function of protecting the infant.

[0060] In the embodiment, when the smallest seating part is formed, the backrest frame 110 moves to the most front side of the main frame 100, and at this time, the two armrest frames 120 move to the notch part 711 and are attached to the side wall of the notch part 711, so that the gap between the armrest frame 120 and the backrest frame 110 is minimized, thereby avoiding the infant placed on the seating part from being clamped.

[0061] As shown in Figure 1 and Figure 8 In the embodiment, the armrest frame 120 is further provided with a lifting assembly 140. When the protection assembly 130 extends out of the main frame 100, the lifting assembly 140 is driven to extend out of the armrest frame 120 to realize the height adjustment of the armrest frame 120. When the protection assembly 130 is retracted into the main frame 100, the lifting assembly 140 is driven to retract into the armrest frame 120.

[0062] Through the configuration in the embodiment, when the guard assembly 130 is extended to form the enclosing space, the lifting assembly 140 can be driven to extend, the height of the handrail frame 120 is adjusted, the height of the handrail frame 120 is adapted to the height of the backrest frame 110, that is, when the enclosing space is formed, the height of the side wall where the handrail frame 120 and the backrest frame 110 are located is the same, thereby reducing the risk of the baby falling when climbing on the sofa.

[0063] In combination with Figure 3 and Figure 6 As shown in the drawings, in the embodiment, the guard assembly 130 includes a guard box 300, the guard box 300 is internally provided with a guard cavity with an open upper end, the left and right side walls of the guard cavity are oppositely provided with sliding grooves 301 along the height direction thereof, the guard cavity is internally provided with a liftable guard frame 310, the left and right side walls of the guard frame 310 are provided with sliding blocks 311 extended to slide in the sliding grooves 301, the guard cavity is internally provided with a first spring 620 at the left and right sides for driving the guard frame 310 to extend out of the guard cavity, the guard cavity is internally provided with a locking member at the lower side for locking the guard frame 310 in the guard cavity, and the sliding block 220 in the first sliding cavity 201 is provided with an unlocking member for unlocking the guard frame 310 by the locking member.

[0064] In the embodiment, the guard box 300 is fixedly installed in the middle part of the front side wall of the main frame 100 by means of bolts and other fasteners, and in actual use, a slot (not shown in the drawings) for the extension of the guard assembly is reserved on the side surface of the sofa seat surface close to the front side of the main frame 100, and the locking member is provided to fix the guard frame 310 in the guard cavity in the initial state, that is, the guard frame 310 is in the retracted state, so that the user can normally sit on the sofa seat surface.

[0065] The sliding groove 301, the sliding block 311, the first spring 620 and the unlocking member are provided, so that when the sliding block 220 in the first sliding cavity 201 moves to the most front side of the main frame 100, the unlocking member can unlock the fixing of the guard frame 310 by the locking member, so that the guard frame 310 extends out of the opening of the guard cavity under the action of the first spring 620, that is, the guard frame 310 extends onto the slot on the sofa seat surface, so as to surround the smallest seating part, and preferably form an enclosing space for protecting the baby placed on the seating part.

[0066] In combination with Figure 4As shown, in the embodiment, the locking member comprises a locking box 400, and a locking cavity 401 is arranged in the locking box 400. A locking block 420 is arranged in the locking cavity 401 by the second spring 410, and one end of the locking block 420 extends out of the locking box 400. A groove 421 is arranged on the side of the backrest frame 110, and the first slope 422 is arranged on the groove 421. The lower end of the protection frame 310 is arranged with a clamping block 611, and the clamping block 611 is arranged with a clamping groove 612 for the corresponding end of the locking block 420.

[0067] The unlocking member comprises an unlocking rod 221 arranged on the lower end surface of the corresponding sliding block 220, and the unlocking rod 221 extends into the corresponding groove 421 through the locking box 400 to extrude the first slope 422 and drive the locking block 420 to retract into the locking cavity 401.

[0068] In the embodiment, the locking box 400 is fixedly installed in the protection cavity, and the two ends of the locking cavity 401 are arranged with openings. The openings are arranged with plug rings 430, and the locking block 420 extends out through the corresponding plug ring 430. The side wall of the locking block 420 in the locking cavity 401 is arranged with a limiting ring 423 which is in close contact with the plug ring 430 to prevent the locking block 420 from separating from the locking cavity 401.

[0069] Through the structure in the embodiment, in the initial state, the second spring 410 drives the two locking blocks 420 to extend out of the two ends of the locking cavity 401, so that they are clamped into the corresponding clamping grooves 612. The locking of the locking member to the protection frame 310 is preferably achieved, and the protection frame 310 is fixed in the protection box 300.

[0070] The groove 421, the first slope 422 and the unlocking rod 221 are arranged, so that when the backrest frame 110 moves to the most front side of the main frame 100 to form the smallest seating part, the unlocking rod 221 is driven to extend into the groove 421 through the protection box 300 and the locking box 400, extrude the first slope 422, and drive the locking block 420 to retract into the locking cavity 401. That is, the fixation of the clamping block 611 is released, and the protection frame 310 extends out of the protection cavity under the action of the first spring 620.

[0071] The sliding groove 301 and the sliding block 311 are arranged, so that the distance of the protection frame 310 extending out of the protection cavity is limited, thereby avoiding the protection frame 310 from separating from the protection cavity.

[0072] The upper side of the locking block 420 extends out of the locking cavity 401 in actual use is provided with a second inclined surface 424. By using this structure, in the process of the user pressing the protective frame 310 to make it retract into the protective cavity, the lower side wall of the clamping block 611 can extrude the second inclined surface 424 to make the locking block 420 retract into the locking cavity 401. At the same time, when the clamping block 611 continues to move downward and the locking block 420 is opposite to the clamping groove 612, the second spring 410 drives the locking block 420 to automatically clamp into the corresponding clamping groove 612, so as to realize the locking and fixing of the protective frame 310 in the protective cavity, and facilitate its extension again.

[0073] In combination Figure 5 As shown in the drawings, in the embodiment, the handrail frame 120 is provided with a lifting groove 511 opening upward, the lifting assembly 140 includes a lifting frame 520 which is liftable in the lifting groove 511, the lifting groove 511 is provided with an air bag 530 below the lifting frame 520 for driving the lifting frame 520 to lift and lower, and the locking box 400 is provided with a trigger assembly on the side face facing the backrest frame 110 for driving the air bag 530 to extend and retract.

[0074] In the embodiment, the outer circumferential side of the air bag 530 is formed with a bent corrugated portion, and the upper end face thereof is fixedly installed on the lower end face of the lifting frame 520. The main frame 100 is further provided with a gas supply assembly (not shown in the drawings) for supplying gas into the air bag 530. The gas supply assembly includes a gas guide pipe in communication with the air bag 530 and a blower. In actual use, the position where the gas guide pipe is connected with the air bag 530 is provided with an electromagnetic valve. The electromagnetic valve is used to realize the opening and closing of the gas guide pipe. In actual use, when the electromagnetic valve is opened, the blower is rotated in a forward direction to blow air into the air bag 530, so that the air bag 530 is stretched at the bottom of the lifting groove 511, thereby pushing the lifting frame 520 to extend out of the lifting groove 511. When the electromagnetic valve is opened, the blower is rotated in a reverse direction to suck air out of the air bag 530, so that the air bag 530 is retracted at the bottom of the lifting groove 511, thereby pushing the lifting frame 520 to be accommodated in the lifting groove 511.

[0075] The opening and closing of the electromagnetic valve and the forward and reverse rotation of the blower are respectively controlled by a first trigger switch 330 and a second trigger switch 340. The first trigger switch 330 and the second trigger switch 340 are installed on the side face of the locking box 400 facing the backrest frame 110.

[0076] The trigger assembly is arranged to trigger the first trigger switch 330 and the second trigger switch 340, drive the electromagnetic valve and the blower to work, and realize the contraction of the air bag 530.

[0077] In combination Figure 3As shown, in the embodiment, the trigger assembly includes a trigger block 320 arranged along the length direction of the locking box 400, the first trigger slope 321 is arranged on one end surface of the trigger block 320 and located at the lower side, the second trigger slope 322 is arranged on the other end surface of the trigger block 320 and located at the upper side, the first trigger rod 312 is arranged on the lower side of the slider 311 corresponding to one end of the trigger block 320, the second trigger rod 313 is arranged on the upper side of the slider 311 corresponding to the other end of the trigger block 320, the upward movement of the protective frame 310 is used to drive the first trigger rod 312 to extrude the first trigger slope 321 to push the trigger block 320 to move to the other end, and the downward movement of the protective frame 310 is used to drive the second trigger rod 313 to extrude the second trigger slope 322 to push the trigger block 320 to move to one end.

[0078] In actual use, the locking box 400 is arranged with an L-shaped mounting bracket on the side surface facing the backrest frame 110, the trigger block 320 is movably mounted on the mounting bracket, the trigger block 320 is arranged with a stop block matched with the mounting bracket to realize the sliding mounting of the trigger block 320 between the two mounting brackets; in actual use, the trigger block 320 is located at the upper position of the protective box 300, that is, in the original state that the protective frame 310 is accommodated in the protective box 300, the trigger block 320 is located at the upper side of the second trigger rod 313, at the same time, one end of the trigger block 320 extends from one side of the protective box 300, by this structure, in the lifting process of the protective frame 310, the first trigger rod 312 can be matched with the first trigger slope 321 on the one end surface of the trigger block 320 to drive the trigger block 320 to move to the other end, in this moving process, the trigger block 320 triggers the first trigger switch 330 to make the electromagnetic valve open, the blower rotates in the positive direction to realize the inflation of the air bag 530; in this process, the other end of the trigger block 320 extends from the other side of the protective box 300, at this time, the first lead screw 202 rotates to drive the backrest frame 110 to move to the rear side of the main frame 100 to make the unlocking rod 221 disengage from the groove 421, so that the user presses the protective frame 310 to move downward to make it retract into the protective box 300, in this process, the second trigger rod 313 can extrude the second trigger slope 322 on the other end surface of the trigger block 320 to drive the trigger block 320 to move to one end, in this moving process, the trigger block 320 triggers the second trigger switch 340 to make the electromagnetic valve open, the blower rotates in the reverse direction to realize the deflation of the air bag 530; by this structure, the lifting of the lifting assembly is driven when the protective assembly is lifted, so that the use of the sofa is more convenient.

[0079] The embodiment also provides a sofa adjusting method, which adopts the adjustable sofa and specifically includes the following steps.

[0080] S1, when the user is an adult, the user sits on the seat of the sofa, the motor 250 is controlled to drive the first screw rod 202 to rotate, the backrest frame 110 and the armrest frame 120 are driven to move relative to each other, the size of the space between the seats is adjusted to be suitable for the size of the user, the backrest frame 110 supports the back of the user, and the armrest frame 120 can support the arms of the user;

[0081] S2, when the user is a baby, the guardian controls the motor 250 to drive the first screw rod 202 to rotate, the backrest frame 110 is driven to move to the frontmost side of the main frame 100, and the armrest frame 120 is synchronously driven to move close to each other, so that the two form the smallest seat;

[0082] S3, in step S2, when the backrest frame 110 moves to the frontmost side of the main frame 100, the unlocking rod 221 extends into the groove 421, the locking block 420 is driven to retract, the locking of the protection frame 310 is released, the protection frame 310 extends under the action of the first spring 620, so that it can surround the seat and form an enclosure space, at this time, the guardian places the baby in the enclosure space;

[0083] S4, in step S3, during the extension of the protection frame 310 in the protection box 300, the first trigger rod 312 extrudes the first trigger slope 321 to drive the trigger block 320 to move to the other end, the trigger block 320 triggers the first trigger switch 330, the air bag 530 is inflated, the lifting frame 520 is driven to extend, the height of the armrest frame 120 is adjusted to be suitable for the backrest frame 110, so as to improve the protection effect of the enclosure space.

[0084] S5, when the guardian controls the motor 250 to drive the first screw rod 202 to rotate, so that the unlocking rod 221 is separated from the groove 421, the second trigger rod 313 extrudes the second trigger slope 322 to drive the trigger block 320 to move to one end during the process that the guardian presses the protection frame 310 to retract into the protection box 300, the trigger block 320 triggers the second trigger switch 340, the air bag 530 is exhausted, the lifting frame 520 is driven to retract, so that the sofa is convenient for step S1.

[0085] In summary, the above only describes the preferred embodiment of the present application, and any equivalent changes and modifications made within the scope of the patent application of the present application shall be included in the scope of the present application.

Claims

1. An adjustable sofa, comprising a main frame (100), a backrest frame (110), and opposing armrest frames (120), characterized in that: The backrest frame (110) and the opposing armrest frame (120) are used to form a seating area above the main frame (100). The main frame (100) is provided with a drive mechanism for driving the backrest frame (110) and the armrest frame (120) to move relative to each other to adjust the size of the seating area. A protective component (130) is provided inside the main frame (100) and near the front side, which can be stored inside the main frame (100). When the drive mechanism drives the backrest frame (110) and armrest frame (120) to approach each other to form the minimum seating area, the drive protective component (130) extends to the top of the main frame (100) to surround the seating area. The handrail (120) is also provided with a lifting component (140). When the protective component (130) extends out of the main frame (100), it is used to drive the lifting component (140) to extend out of the handrail (120) to realize the height adjustment of the handrail (120). When the protective component (130) retracts into the main frame (100), it is used to drive the lifting component (140) to retract into the handrail (120).

2. An adjustable sofa according to claim 1, characterized in that: The driving mechanism includes a first mounting box (200) arranged along the front-rear direction of the main frame (100) and a second mounting box (210) arranged perpendicularly to the first mounting box (200) on both sides of the first mounting box (200). The first mounting box (200) has a first sliding cavity (201), and the second mounting box (210) has a second sliding cavity (211). The first sliding cavity (201) has a rotatable first lead screw (202), and the second sliding cavity (211) has a rotatable second lead screw (212) with one end extending into the first sliding cavity (201). The first lead screw (202) has a driving bevel gear (203), and the second lead screw... The rod (212) is provided with a driven bevel gear (213) that cooperates with the driving bevel gear (203); the first sliding cavity (201) and the second sliding cavity (211) are each provided with a sliding block (220); the first lead screw (202) and the second lead screw (212) are threaded through the corresponding sliding block (220); the backrest frame (110) is set on the corresponding sliding block (220) through the first support frame (230); the armrest frame (120) is set on the corresponding sliding block (220) through the second support frame (240); the first lead screw (202) rotates to drive the backrest frame (110) and the armrest frame (120) to move closer or further apart from each other.

3. An adjustable sofa according to claim 2, characterized in that: The first mounting box (200) is provided with a motor (250) for driving the first lead screw (202) to rotate.

4. An adjustable sofa according to claim 3, characterized in that: The protective assembly (130) includes a protective box (300), which has a protective cavity. The left and right side walls of the protective cavity are provided with sliding grooves (301) along their height direction. The protective cavity has a liftable protective frame (310). The left and right side walls of the protective frame (310) are provided with sliders (311) that extend out of the corresponding sliding grooves (301) and slide. The protective cavity is provided with a first spring (620) for driving the protective frame (310) to extend out of the protective cavity. The protective cavity is provided with a locking member for locking the protective frame (310) in the protective cavity at the bottom. The sliding block (220) in the first sliding cavity (201) is provided with an unlocking member for releasing the locking member from locking the protective frame (310).

5. An adjustable sofa according to claim 4, characterized in that: The locking component includes a locking box (400), a locking cavity (401) is provided inside the locking box (400), and a locking block (420) with one end extending out of the corresponding end of the locking box (400) is provided in the locking cavity (401) by a second spring (410). The locking block (420) has a groove (421) on the side facing the backrest frame (110), and a first inclined surface (422) is provided on the groove (421). The lower end of the protective frame (310) is provided with a snap-fit ​​block (611), and the snap-fit ​​block (611) has a snap-fit ​​groove (612) for one end of the corresponding locking block (420) to be inserted. The unlocking component includes an unlocking rod (221) disposed on the lower end face of the corresponding sliding block (220). The unlocking rod (221) passes through the locking box (400) and extends into the corresponding groove (421) to press the first inclined surface (422) to drive the locking block (420) to retract into the locking cavity (401).

6. An adjustable sofa according to claim 5, characterized in that: The armrest frame (120) is provided with a lifting groove (511). The lifting assembly (140) includes a lifting frame (520) that can be lifted and lowered in the lifting groove (511). An airbag (530) for driving the lifting frame (520) to lift and lower is provided in the lifting groove (511) and below the lifting frame (520). A trigger assembly for driving the airbag (530) to extend and retract is provided on the side of the locking box (400) facing the backrest frame (110).

7. An adjustable sofa according to claim 6, characterized in that: The triggering assembly includes a trigger block (320) arranged along the length of the locking box (400). A first triggering ramp (321) is provided on one end face of the trigger block (320) at the bottom, and a second triggering ramp (322) is provided on the other end face at the top. A first triggering rod (312) is provided on the lower side of the slider (311) at one end of the trigger block (320), and a second triggering rod (313) is provided on the upper side of the slider (311) at the other end of the trigger block (320). The protective frame (310) moves upward to drive the first triggering rod (312) to press the first triggering ramp (321) and push the trigger block (320) to the other end. The protective frame (310) moves downward to drive the second triggering rod (313) to press the second triggering ramp (322) and push the trigger block (320) to one end.

8. An adjustable sofa according to claim 7, characterized in that: The outer side of the protective box (300) is provided with a first trigger switch (330) and a second trigger switch (340). The trigger block (320) moves to the other end to trigger the first trigger switch (330) to inflate the airbag (530). The trigger block (320) moves to one end to trigger the second trigger switch (340) to depress the airbag (530).

9. A sofa adjustment method, characterized in that: The adjustable sofa according to claim 8 specifically includes the following steps: S1. When the user is an adult, the user sits on the seat of the sofa and the control motor (250) drives the first lead screw (202) to rotate, which drives the backrest frame (110) and the armrest frame (120) to move relative to each other, adjusting the size of the space between the seat to a size suitable for the user, so that the backrest frame (110) supports the user's back and the armrest frame (120) can support the user's arms. S2. When the user is an infant, the guardian controls the motor (250) to drive the first lead screw (202) to rotate, which drives the backrest frame (110) to move to the front of the main frame (100) and synchronously drives the armrest frame (120) to move closer to each other, so that the two form the smallest possible seating area. S3. In step S2, when the backrest frame (110) moves to the frontmost side of the main frame (100), the unlocking rod (221) extends into the groove (421) to drive the locking block (420) to retract, releasing the lock on the protective frame (310), allowing it to extend under the action of the first spring (620) so that it can surround the seating part and form a barrier space. At this time, the guardian places the infant in the barrier space. S4. In step S3, during the process of the protective frame (310) extending out of the protective box (300), the first trigger rod (312) presses the first trigger ramp (321) to drive the trigger block (320) to move to the other end. During this process, the trigger block (320) triggers the first trigger switch (330) to inflate the airbag (530), drive the lifting frame (520) to extend, and adjust the height of the handrail frame (120) to match the backrest frame (110) to improve the protective effect of the enclosure space. S5. When the guardian uses the motor (250) to drive the first lead screw (202) to rotate, causing the unlocking rod (221) to disengage from the groove (421), and the guardian uses the protective frame (310) to retract it into the protective box (300), during the process of the second trigger rod (313) squeezing the second trigger ramp (322) to drive the trigger block (320) to move to one end, the trigger block (320) triggers the second trigger switch (340), causing the airbag (530) to release air, driving the lifting frame (520) to retract, making the sofa easier to perform step S1.

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