A sitting sofa with a mobile cushion function

Abstract

The present invention discloses a sitting sofa with a mobile pad function, comprising a seat cushion frame, a backrest frame, a massage movement, a pad and a driving assembly, wherein the driving assembly comprises a transmission cable for driving the pad to move to the rear side of the backrest frame or to cover the massage movement, and a sprocket for driving the transmission cable to circulate, the transmission cable is arranged along the backrest frame to form a ring, the sprocket is rotatably arranged on the backrest frame, and a plurality of caliper grooves are formed by recesses at intervals on the circumference of the sprocket, each caliper groove is telescopically provided with a caliper for driving the transmission cable to move and an elastic member for driving the caliper to extend out of the caliper groove and tension the transmission cable, and further comprises a limiting structure for limiting the caliper from falling, the pad is locked on the transmission cable and moves synchronously therewith, and the pad can be adjusted to cover the massage movement in an electric manner, without manual adjustment, which is more convenient and can also prevent the pad from falling or being forgotten, and is more stable when used.

Description

Technical Field

[0001] The present invention relates to the technical field of massagers, in particular to a sitting sofa with a mobile pad function. Background Art

[0002] In the prior art, massage sofas are provided with a moving massage mechanism, which can be pressed against the human body to perform kneading or tapping massage when in use. When the massage function is not in use, the user lies flat on the massage sofa, and the massage mechanism will also press against the human body, making the user less comfortable when lying flat. Therefore, a protective pad is required to cover the massage mechanism to prevent the massage mechanism from being pressed against the human body during rest. However, most of the protective pads currently on the market are manually adjusted, which has limitations and is inconvenient to use. Summary of the Invention

[0003] Purpose of the present invention: In order to overcome the defects of the prior art, the present invention provides a sitting sofa with a roaming pad function. The purpose is to avoid the discomfort of the manipulator supporting the user when the customer does not need a massage and needs to rest on the seat or sofa, so as to isolate the manipulator through the pad, which helps the user to rest. At the same time, in order to further help the user to rest, the pad can be adjusted to cover the massage movement in an electric way, without manual adjustment, which is more convenient, and can also prevent the pad from falling or being forgotten, and is more stable when used.

[0004] The present invention discloses a sitting sofa with a moving pad function, comprising a seat cushion frame, a backrest frame and a massage movement arranged on the backrest frame, characterized in that it also includes a pad that travels on the backrest frame for covering the massage movement and a driving component for driving the pad to move, the driving component including a transmission cable for driving the pad to move to the rear side of the backrest frame or to cover the massage movement, a sprocket for driving the transmission cable to circulate, the transmission cable being arranged along the backrest frame to form a ring, the sprocket being rotatably arranged on the backrest frame, and a plurality of caliper grooves being recessed at intervals on the circumference of the sprocket, each caliper groove being telescopically provided with a caliper for driving the transmission cable to move and an elastic member for driving the caliper to extend out of the caliper groove and tension the transmission cable, the seat cushion frame also including a limiting structure for limiting the caliper from falling, the pad being locked on the transmission cable and moving synchronously with the transmission cable, the seat cushion frame also being provided with a physiotherapy cushion, and the physiotherapy cushion being movably arranged on the seat cushion frame.

[0005] By adopting the above technical solution, when adjusting, the caliper will directly or indirectly counteract the transmission cable due to the elastic force of the elastic part, thereby tensioning the transmission cable. At this time, when the sprocket rotates, it will drive the transmission cable to move. Since the pad is locked on the transmission cable, the pad will move together, thereby realizing automatic adjustment of the pad, so that the massage movement can be covered when the sofa is not in use to avoid hurting the user, and locking the pad on the transmission cable can also prevent it from falling or being forgotten. It is most preferred that the drive assembly is provided with two groups, and the pad is arranged between the two transmission cables, so that the pad is more stable when moving, and can also have a therapeutic effect through the therapeutic seat cushion, which is more practical.

[0006] A further configuration of the present invention is that it also includes a swing arm and a rotating shaft rotatably arranged on the seat cushion frame, a shaft body is passed through the backrest frame, the swing arm includes a rotating end which is sleeved on the rotating shaft and can rotate relative to the rotating shaft, and a swinging end which is arranged on the shaft body and can drive the shaft body to swing, the sprocket is rotatably sleeved on the shaft body, and the swing arm can drive the backrest frame to flip backward to form an anti-bow training frame.

[0007] By adopting the above technical solution, when the swing arm rotates relative to the rotating shaft, the swing of the swing arm can drive the shaft body to swing, thereby driving the entire backrest frame to rotate to achieve angle adjustment, and driving the entire backrest frame to move without affecting the operation of the sprocket, so that the pad adjustment and the overall swing of the backrest frame do not interfere with each other, making the structural layout more reasonable, and the backrest frame can also be flipped to the reverse arch state for sit-up training or waist stretching.

[0008] The present invention is further provided with: the limiting structure includes a blocking member arranged on the shaft body at opposite sides of the sprocket for limiting the side sliding of the caliper, and an extension rod arranged on the caliper. The extension rod passes through one of the blocking members to form a limit for the caliper to fall out of the caliper groove. The blocking member is also provided with an avoidance groove for the extension rod to move around.

[0009] By adopting the above technical solution, the blocking member can block the left and right sides of the caliper slot to prevent the caliper from sliding sideways, and then an extension rod is passed through the blocking member to prevent the caliper from being popped out of the caliper slot by the elastic member, making it more stable when in use, and the avoidance groove is set to allow the caliper to extend and retract normally without obstruction.

[0010] The present invention is further provided with: a plurality of abutment members for abutting against the caliper to achieve tensioning are arranged at intervals on the transmission cable, a U-shaped guide rail is arranged on the backrest frame, a guide groove is provided on the U-shaped guide rail, and the guide groove is a through groove, which includes an inlet end and an outlet end, the caliper on the sprocket can be rotated to connect with the outlet end, a roller is provided at the bottom of the abutment member, and the caliper is also provided with a U-shaped abutment surface for abutting against the roller, when the roller rolls out of the guide groove from the outlet end, the elastic member can drive the U-shaped abutment surface of the caliper to abut against the roller, and also includes an abutment member guide rail arranged along the circumferential direction on the outside of the sprocket for limiting the deflection of the abutment member, one end of the abutment member guide rail is connected with the inlet end, and the other end is connected with the outlet end.

[0011] By adopting the above technical solution, the transmission cable can be indirectly tensioned by cooperating with the abutment and the caliper, and the resistance of the roller on the U-shaped guide rail can be reduced by cooperating with the roller and the guide groove. When the roller rolls out of the guide groove from the outlet end, it is easy to fall over, making the mechanism unable to operate. By passing the abutment through the abutment guide rail, it can prevent it from falling over, making it more stable during operation.

[0012] The present invention is further provided with a spring plate seat on the shaft body, and spring plates for pushing the extension rod outward are arranged at intervals along the circumferential direction of the spring plate seat, the spring plates are arranged in one-to-one correspondence with the extension rods, and each extension rod is provided with a snap-fit ​​groove, and the spring plates are provided with a hook corresponding to the snap-fit ​​groove.

[0013] By adopting the above technical solution, the spring sheet cooperates with the elastic member to prevent the caliper from tilting due to the resetting of the elastic member, making the caliper more stable when in use and not getting stuck, and the spring sheet can be prevented from detaching from the extension rod by cooperating with the hook and the clamping groove.

[0014] A further configuration of the present invention is that the backrest is also provided with an extrusion piece for extruding the extension rod so that the caliper is retracted into the caliper groove. The extrusion piece is arranged in an arc shape and is located on the outside of the extension rod, and both ends of the extrusion piece are provided with an arc-shaped transition section, one of the transition sections corresponds to the inlet end, and the other transition section corresponds to the outlet end.

[0015] The above technical solution can facilitate the connection between the caliper and the roller, making it more stable during use.

[0016] The present invention is further configured as follows: a bearing is sleeved on the rotating shaft, the rotating end of the swing arm is sleeved on the bearing and rotates synchronously with the outer ring of the bearing, a swing arm driving gear is rotatably arranged on the rotating shaft, and the swing arm driving gear is linked to the rotating end.

[0017] By adopting the above technical solution, the rotating end can rotate relatively. When the swing arm driving gear rotates, the rotating end can be driven to rotate relative to the rotating shaft. At this time, the swing end can be driven to swing, thereby driving the backrest frame to swing.

[0018] The present invention is further provided with a shift hole arranged along the swing trajectory of the shaft, the shaft is inserted into the shift hole, and a limit switch for limiting the swing angle of the shaft is provided on the shift hole.

[0019] By adopting the above technical solution, the swing angle of the backrest frame can be limited to prevent the backrest frame from rotating at an excessive angle.

[0020] A further configuration of the present invention is that the seat cushion frame is provided with a power-off protection structure, which includes a gravity sensing switch provided on the seat cushion frame and a sensing panel for triggering the gravity sensing switch.

[0021] By adopting the above technical solution, when a human body sits on the cushion frame, it will apply pressure to the sensing panel, causing the sensing panel to trigger the gravity sensing switch, and then the circuit driving the pad can be disconnected through the circuit board control, making it safer and more stable when in use, and also preventing the pad from being damaged due to excessive resistance during operation.

[0022] The present invention is further configured as follows: one of the blocking members is a gear plate, which rotates synchronously with the sprocket. The rotating shaft can drive the gear plate to rotate via the gear assembly, thereby driving the shaft body to rotate.

[0023] By adopting the above technical solution, the structural layout is more reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall flat-lying structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall back-to-back structure of the present invention;

[0026] Figure 3 This is a schematic structural diagram of the present invention when the protective pad is moved to the rear side of the backrest;

[0027] Figure 4 Schematic diagram of the internal structure of the present invention;

[0028] Figure 5 Schematic diagram of the internal structure of the present invention;

[0029] Figure 6 This is a diagram showing the coordination of the components on the sprocket of the present invention;

[0030] Figure 7 for Figure 6 Section view along AA;

[0031] Figure 8 for Figure 6 Stereogram;

[0032] Figure 9 for Figure 8 Remove a caliper structure diagram;

[0033] Figure 10 This is a schematic diagram of the caliper structure of the present invention;

[0034] Figure 11 This is a diagram showing the coordination of the shrapnel and the shrapnel seat of the present invention;

[0035] Figure 12 for Figure 3 Enlarged view of part a;

[0036] Figure 13 for Figure 4 Part b enlarged view;

[0037] Figure 14 for Figure 5 Enlarged view of local c;

[0038] Figure 15 The U-shaped guide rail of the present invention has an abutment guide rail;

[0039] Figure 16 The U-shaped guide rail of the present invention does not have an abutment guide rail.

[0040] Cushion frame 1, backrest frame 2, massage movement 3, pad 4, transmission cable 5, abutment 51, roller 511, sprocket 6, caliper groove 61, caliper 7, U-shaped abutment surface 71, elastic member 8, blocking member 91, extension rod 92, snap-on groove 921, avoidance groove 911, swing arm 10, rotating end 101, swing end 102, rotating shaft 20, shaft body 30, U-shaped guide rail 40, guide groove 401, abutment guide rail 402, shrapnel seat 50, shrapnel 501, hook 5011, extrusion member 60, transition section 601, bearing 70, swing arm drive gear 80, gear hole 90, limit switch 100, sensor panel 200, gravity sensor switch 300, therapy cushion 400. DETAILED DESCRIPTION

[0041] The following describes the specific embodiments of the present invention in detail with reference to the accompanying drawings:

[0042] In the description of the present invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention.

[0043] The present invention discloses a sitting sofa with a wandering pad function, comprising a seat cushion frame 1, a backrest frame 2 and a massage movement 3 arranged on the backrest frame 2. The movement of the massage movement 3 is common knowledge among those skilled in the art and will not be described in detail herein. In the embodiment of the present invention, it also includes a pad 4 that wanders on the backrest frame 2 for covering the massage movement 3 and a driving assembly for driving the pad 4 to move. The driving assembly includes a transmission cable 5 for driving the pad 4 to move to the rear side of the backrest frame 2 or to cover the massage movement 3, and a sprocket 6 for driving the transmission cable 5 to circulate. The transmission cable 5 is arranged to form a ring along the backrest frame 2, and the sprocket 6 is rotatably arranged on the backrest frame 2, and a plurality of caliper grooves 61 are formed by recessed intervals on the circumference of the sprocket 6. Each caliper groove 61 is telescopically provided with a caliper 7 for driving the transmission cable 5 to move, and an elastic member 8 for driving the caliper 7 to extend out of the caliper groove 61 and to tension the transmission cable 5 (the elastic member 8 is most preferably a spring, but of course it can also be an elastic member). The sprocket 6 then drives the sprocket 5 to move, and the sprocket 6 drives the sprocket 5 to move.

[0044] It also includes a swing arm 10 and a rotating shaft 20 rotatably arranged on the seat cushion frame 1, a shaft body 30 is worn on the backrest frame 2, the swing arm 10 includes a rotating end 101 sleeved on the rotating shaft 20 and rotatable relative to the rotating shaft 20 and a swing end 102 provided on the shaft body 30 and capable of driving the shaft body 30 to swing, the sprocket 6 is rotatably sleeved on the shaft body 30, when the swing arm 10 rotates relative to the rotating shaft 20, the shaft body 30 can be driven to swing by the swing arm 10, thereby driving the entire backrest frame 2 to rotate to achieve angle adjustment (the specific control method of the swing arm 10 can be controlled separately by a motor), and driving the backrest The overall movement of the frame 2 will not affect the operation of the sprocket 6, so that the adjustment of the pad 4 and the overall swing of the backrest frame 2 do not interfere with each other, and the structural layout is more reasonable. The rotating shaft 20 can be driven by a motor. The specific method can be to set a bevel gear on the rotating shaft 20 and then set a gear compatible with it on the motor output shaft, or it can be through a worm gear. The specific driving method of the rotating shaft is common knowledge among technicians in this field, and this article will not introduce it in detail. The swing arm 10 can drive the backrest frame 2 to flip backward to form an anti-arch training frame for sit-up training or stretching the waist.

[0045] The limiting structure includes a blocking member 91 arranged on the shaft body 30 on opposite sides of the sprocket 6 for limiting the side sliding of the caliper 7, and an extension rod 92 arranged on the caliper 7. The extension rod 92 passes through one of the blocking members 91 to form a limit for the caliper 7 to fall out of the notch of the caliper groove 61. The blocking member 91 is also provided with an avoidance groove 911 for the extension rod 92 to move around. The blocking member 91 can block the left and right sides of the caliper groove 61 to prevent the caliper 7 from sliding sideways, and then the extension rod 92 passes through the blocking member 91 to prevent the caliper 7 from being ejected from the caliper groove by the elastic member 8, so that it is relatively stable when in use, and the avoidance groove 911 is provided to allow the caliper 7 to extend and retract normally without being hindered.

[0046] The transmission cable 5 is provided with a plurality of abutting members 51 for abutting against the caliper 7 to achieve tensioning. A U-shaped guide rail 40 is provided on the backrest 2. A guide groove 401 is provided on the U-shaped guide rail 40, and the guide groove 401 is a through groove, which includes an inlet end and an outlet end. The caliper 7 on the sprocket 6 can be rotated to connect with the outlet end. A roller 511 is provided at the bottom of the abutting member 51, and the caliper 7 is further provided with a U-shaped abutting surface 71 for abutting against the roller 511. When the roller 511 rolls out of the guide groove 401 from the outlet end, the elastic member 8 can drive the caliper 7 The U-shaped abutment surface 71 abuts against the roller 511, and the transmission cable 5 can be indirectly tensioned by the cooperation of the abutment member 51 and the caliper 7. The cooperation of the roller 511 and the guide groove 401 can reduce the resistance of the roller 511 on the U-shaped guide rail 40, and the abutment of the U-shaped abutment surface 71 against the abutment member 51 can facilitate the sprocket 6 to drive the transmission cable 5 to move. The cooperation of the abutment member 51 and the caliper 7 can prevent the transmission cable 51 from being worn, and the protective pad 4 is sewn to the transmission cable 5, and the cooperation of the abutment member 51 can prevent the suture line from being worn.

[0047] It also includes an abutment guide rail 402 arranged along the circumferential direction on the outside of the sprocket 6 for limiting the abutment 51 from tilting. One end of the abutment guide rail 402 is connected to the inlet end, and the other end is connected to the outlet end. When the roller 511 rolls out of the guide groove 401 from the outlet end, it is easy to tilt, thereby making the mechanism unable to operate. The abutment 51 is passed through the abutment guide rail 402 to prevent it from tilting, making it more stable during operation. It is most preferred that a guide hole is provided on the abutment guide rail 402, and the abutment 51 is partially located in the guide hole and passes through the guide hole, so that it can be guided and slid in the guide hole.

[0048] The shaft body 30 is provided with a spring plate seat 50, and the spring plate seat 50 is provided with spring plates 501 for pushing the extension rod 92 outward at intervals along the circumferential direction. The spring plates 501 are arranged in a one-to-one correspondence with the extension rods 92, and each extension rod 92 is provided with a clamping groove 921. The spring plate 501 is provided with a hook 5011 corresponding to the clamping groove 921. The spring plate 501 cooperates with the elastic member 8 to prevent the caliper 7 from tilting due to the reset of the elastic member 8, so that the caliper 7 is more stable when in use and will not get stuck. The cooperation between the hook 5011 and the clamping groove 921 can prevent the spring plate 501 from detaching from the extension rod 92.

[0049] The backrest 2 is also provided with an extrusion piece 60 for squeezing the extension rod 92 so that the caliper 7 is retracted into the caliper groove 61. The extrusion piece 60 is arranged in an arc shape and is located on the outside of the extension rod 92, and both ends of the extrusion piece 60 are provided with an arc-shaped transition section 601, one of the transition sections 601 corresponds to the inlet end, and the other transition section 601 corresponds to the outlet end, which can facilitate the connection between the caliper 7 and the roller 511, making it more stable when in use.

[0050] A bearing 70 is provided on the rotating shaft 20, and the rotating end 101 of the swing arm 10 is provided on the bearing 70 and rotates synchronously with the outer ring of the bearing 70. A swing arm driving gear 80 is rotatably provided on the rotating shaft 20, and the swing arm driving gear 80 is linked with the rotating end 101 (the two can achieve synchronous rotation through the cooperation of grooves and protrusions), so that the rotating end 101 can rotate relative to the rotating shaft 20. When the swing arm driving gear 80 rotates, it can drive the rotating end 101 to rotate relative to the rotating shaft 20. At this time, it can drive the swing end 102 to swing, thereby driving the backrest frame 2 to swing.

[0051] The seat cushion frame 1 is also provided with a shift hole 90 arranged along the swing trajectory of the shaft body 30. The shaft body 30 is inserted into the shift hole 90, and a limit switch 100 is provided on the shift hole 90 for limiting the swing angle of the shaft body 30. The swing angle of the backrest frame 2 can be limited to prevent it from rotating too much. The shaft body can make a clicking sound when moving in the shift hole 90, making it more convenient to adjust and facilitate the control of the gear.

[0052] The driving assembly is provided with two groups, and the pad 4 is provided between the two transmission cables 5, so that the pad 4 is more stable when moving.

[0053] One of the blocking members 91 is a gear plate, which rotates synchronously with the sprocket 6. The rotating shaft 20 can drive the gear plate to rotate through the gear, thereby driving the sprocket 6 to rotate, and the sprocket of the therapy cushion 400 can be assembled on the rotating shaft 20 to achieve synchronous sliding adjustment of the therapy cushion 400 and the pad 4, and there is no need to set up an additional motor control, and the structural layout is more reasonable.

[0054] The seat cushion frame 1 is provided with a power-off protection structure, which includes a gravity sensing switch 300 provided on the seat cushion frame 1 and a sensing panel 200 for triggering the gravity sensing switch 300. The seat cushion frame 1 is also provided with a sensing panel 200 for driving the sensing panel 200. When a human body sits on the seat cushion frame 1, it will apply pressure to the sensing panel 200, so that the sensing panel 200 triggers the gravity sensing switch 300, and then the circuit driving the protective pad 4 can be disconnected through the circuit board control (the specific control method of the circuit board belongs to the common knowledge of technicians in this field and does not involve procedural innovation. It will not be introduced in detail in this article), making it safer and more stable when used, and can also prevent the protective pad from being damaged due to excessive resistance during operation. The sensing panel 200 can also be elastically reset using a spring bracket. The gravity sensing switch 300 can be purchased directly from the market, so it will not be introduced in detail in this article. It is most preferred that the gravity sensing switch 300 is triggered when the gravity is greater than 5KG.

[0055] To sum up, the purpose is to avoid the discomfort caused by the manipulator supporting the user when the customer does not need a massage and needs to rest on the sofa, so as to isolate the manipulator through the pad, which helps the user to rest. At the same time, in order to further help the user to rest, the sofa is also provided with a therapeutic cushion 400 to assist with heat therapy and magnetic therapy.

Claims

1. A sitting sofa with a mobile cushion function, comprising a seat cushion frame (1), a backrest frame (2), and a massage mechanism (3) provided on the backrest frame (2), characterized in that: The utility model also includes a protective pad (4) that travels on the backrest frame (2) and is used to cover the massage mechanism (3), and a driving assembly for driving the protective pad (4) to move. The driving assembly includes a transmission cable (5) for driving the protective pad (4) to move to the rear side of the backrest frame (2) or to cover the massage mechanism (3), and a sprocket (6) for driving the transmission cable (5) to circulate. The transmission cable (5) is arranged along the backrest frame (2) to form a ring. The sprocket (6) is rotatably arranged on the backrest frame (2), and the sprocket ( 6) is recessed at intervals on the circumference to form a plurality of caliper grooves (61), each caliper groove (61) is telescopically provided with a caliper (7) for driving the transmission cable (5) to move and an elastic member (8) for driving the caliper (7) to extend out of the caliper groove (61) and to tighten the transmission cable (5), and also includes a limiting structure for limiting the caliper (7) from falling, the pad (4) is locked on the transmission cable (5) and moves synchronously therewith, and the cushion frame (1) is also provided with a physiotherapy cushion (400), the physiotherapy cushion The cushion (400) is movably arranged on the cushion frame (1), and a plurality of abutting members (51) for abutting against the caliper (7) to achieve tensioning are arranged at intervals on the transmission cable (5). A U-shaped guide rail (40) is arranged on the backrest frame (2), and a guide groove (401) is provided on the U-shaped guide rail (40), and the guide groove (401) is a through groove, which includes an inlet end and an outlet end. The caliper (7) on the sprocket (6) can be rotated to connect with the outlet end, and a roller (51) is provided at the bottom of the abutting member (51). 1), the caliper (7) is further provided with a U-shaped abutting surface (71) for abutting against the roller (511), and when the roller (511) rolls out of the guide groove from the outlet end, the elastic member (8) can drive the U-shaped abutting surface (71) of the caliper (7) to abut against the roller (511), and further includes an abutting member guide rail (402) arranged on the outer side of the sprocket (6) along the circumferential direction for limiting the abutting member (51) from tilting, and one end of the abutting member guide rail (402) is connected to the inlet end, and the other end is connected to the outlet end.

2. The sofa with a movable cushion function according to claim 1, characterized in that: The invention also includes a swing arm (10) and a rotating shaft (20) rotatably arranged on the seat frame (1); a shaft body (30) is passed through the backrest frame (2); the swing arm (10) includes a rotating end (101) sleeved on the rotating shaft (20) and rotatable relative to the rotating shaft (20); and a swing end (102) provided on the shaft body (30) and capable of driving the shaft body (30) to swing; a sprocket (6) is rotatably sleeved on the shaft body (30); and the swing arm (10) can drive the backrest frame (2) to flip backward to form an anti-arch training frame.

3. The sofa with a movable cushion function according to claim 2, characterized in that: The limiting structure includes a blocking member (91) provided on the shaft body (30) at opposite sides of the sprocket (6) for limiting the side sliding of the caliper (7) and an extension rod (92) provided on the caliper (7). The extension rod (92) passes through one of the blocking members (91) to form a limit for the caliper (7) to fall out of the notch of the caliper slot (61). The blocking member (91) is also provided with an avoidance groove (911) for the extension rod (92) to move around.

4. The sofa with a movable cushion function according to claim 3, characterized in that: The shaft body (30) is provided with a spring plate seat (50), and spring plates (501) for pushing the extension rods (92) outward are provided at intervals along the circumferential direction on the spring plate seat (50), the spring plates (501) and the extension rods (92) being provided in a one-to-one correspondence, and each extension rod (92) is provided with a clamping groove (921), and the spring plates (501) are provided with a clamping hook (5011) corresponding to the clamping groove (921).

5. A sitting sofa with a mobile pad function according to claim 3 or 4, characterized in that: The backrest (2) is further provided with an extrusion member (60) for extruding the extension rod (92) so that the caliper (7) is retracted into the caliper groove (61). The extrusion member (60) is arranged in an arc shape and is located outside the extension rod (92). Both ends of the extrusion member (60) are provided with arc-shaped transition sections (601), wherein one transition section (601) corresponds to the inlet end and the other transition section (601) corresponds to the outlet end.

6. The sofa with a movable cushion function according to claim 5, characterized in that: The rotating shaft (20) is provided with a bearing (70), the rotating end (101) of the swing arm (10) is provided on the bearing (70) and rotates synchronously with the outer ring of the bearing (70), and a swing arm driving gear (80) is rotatably provided on the rotating shaft (20), and the swing arm driving gear (80) is linked with the rotating end (101).

7. The sofa with a movable cushion function according to claim 5, characterized in that: The cushion frame (1) is further provided with a gear hole (90) arranged along the swing trajectory of the shaft body (30), the shaft body (30) is inserted into the gear hole (90), and a limit switch (100) for limiting the swing angle of the shaft body (30) is provided on the gear hole (90).

8. The sofa with a mobile cushion function according to claim 1, characterized in that: The seat cushion frame (1) is provided with a power-off protection structure, which comprises a gravity sensing switch (300) provided on the seat cushion frame (1) and a sensing panel (200) for triggering the gravity sensing switch (300).

9. The sofa with a movable cushion function according to claim 6, characterized in that: One of the blocking members (91) is a gear plate, which rotates synchronously with the sprocket (6). The rotating shaft (20) can drive the gear plate to rotate through the gear assembly, thereby driving the sprocket (6) to rotate.

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