Gravity back-chasing seat

Abstract

The utility model relates to the technical field of seats, in particular to a gravity back-chasing seat, which comprises a seat cushion, a backrest, a mounting frame and a connecting frame, the mounting frame and the connecting frame are positioned between the seat cushion and the backrest, a telescopic support component is arranged between the bottom of the seat cushion and the mounting frame, and the bottom of the connecting frame is rotatably connected with the mounting frame. The backrest is arranged on the connecting frame; a protruding part is arranged on the side, close to the cushion, of the connecting frame, and when the cushion is stressed to move downwards, the cushion makes contact with the protruding part and presses the protruding part downwards, so that the top of the connecting frame moves forwards, and then the backrest moves forwards. Due to the fact that the movement of the seat cushion is matched with the rotation of the connecting frame, when the seat cushion is stressed to move downwards, the seat cushion makes contact with the protruding part and presses the protruding part downwards, the top of the connecting frame moves forwards, then the backrest moves forwards, and the backrest moves forwards to be attached to the back of a child.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, and specifically to a gravity-guided backrest seat. Background Technology

[0002] A chair is a seat with a backrest and armrests. It is categorized into adult chairs and child chairs, with child chairs being a frequently used piece of equipment as children grow, and significantly influencing their posture during daily study.

[0003] Existing child seats typically allow for manual height adjustment, but their backrests are mostly fixed and cannot be moved forward or backward. This results in a fixed seat depth that cannot be adjusted as needed. Consequently, these seats do not conform well to a child's back, which can easily lead to fatigue and hunchback after prolonged sitting, hindering children's healthy growth and enjoyable learning. Summary of the Invention

[0004] The purpose of this invention is to provide a gravity-guided backrest seat, which adapts to the movement of the seat cushion and the rotation of the connecting frame, thereby enabling the backrest to move forward and fit against the child's back, thus solving the problem of the existing fixed backrest.

[0005] The purpose of this utility model is achieved as follows:

[0006] A gravity-guided backrest seat includes a seat cushion and a backrest, as well as a mounting frame and a connecting frame located between the seat cushion and the backrest. A retractable support component is provided between the bottom of the seat cushion and the mounting frame, and the bottom of the connecting frame is rotatably connected to the mounting frame. The backrest is mounted on the connecting frame.

[0007] The connecting frame has a protrusion on the side near the seat cushion. When the seat cushion is subjected to force and moves downward, the seat cushion contacts the protrusion and presses it down, thereby causing the top of the connecting frame to move forward and thus the backrest to move forward.

[0008] Preferably, the support assembly includes a first link and a second link, with the middle portion of the first link and the middle portion of the second link being rotatably connected, and the two ends of the first link and the two ends of the second link being rotatably connected to the seat cushion and the mounting bracket, respectively.

[0009] Preferably, a gas spring is provided between the bottom of the seat cushion and the mounting bracket, and the gas spring is used to restore the seat cushion that has been lowered. The gas spring includes a body and a piston rod, and the body is connected to the bottom of the seat cushion.

[0010] The piston rod has a swingable connecting rod three at the end away from the main body, and the other end of the connecting rod three is connected to a switch at the bottom of the seat cushion by a rope. By turning the switch, the connecting rod three is driven to swing and then come into contact with the piston rod.

[0011] Preferably, the connecting frame includes a front shell and a rear shell, with the front shell located inside the rear shell, and the bottom of the front shell and the bottom of the rear shell are rotatably connected to the mounting frame, and the bottom of the front shell has a protrusion on the side near the seat cushion.

[0012] A connecting rod is provided between the front shell and the rear shell, and the top of the connecting rod is connected to the top of the front shell through an assembly, and the bottom of the connecting rod is connected to the rear shell. The assembly is connected to the backrest, and a headrest is provided on the top of the rear shell.

[0013] Preferably, the top of the front shell is located inside the assembly, and a rod passes through the front shell, the assembly, and the rear shell and is fitted with bolts to connect the front shell, the assembly, and the rear shell;

[0014] Or / and, the bottom of the front shell is located inside the mounting bracket, and the rear shell is located outside the mounting bracket. The mounting bracket has mounting holes and elongated holes on both sides. A rod 2 passes through the front shell, the mounting holes and the rear shell and is fitted with bolt 2 to connect the front shell, the assembly and the rear shell. A rod 3 passes through the front shell, the elongated holes and the rear shell and is fitted with bolt 3 to connect the front shell, the assembly and the rear shell.

[0015] When the seat cushion contacts the protrusion and presses down on the protrusion, rod three moves within the elongated hole and causes the front and rear shells to rotate around the axis of rod two.

[0016] Preferably, it also includes a base, and a movable mounting bracket is provided on the base. The base is provided with a fixing tube, and a connecting tube is provided at the bottom of the mounting bracket. The bottom of the connecting tube is located inside the fixing tube and moves inside the fixing tube.

[0017] The fixed tube contains a sleeve, and the top of the sleeve is provided with a nut. The connecting tube contains a screw, one end of which is connected to a rotating shaft and rotates under the drive of the rotating shaft. The other end of the screw is connected to the nut. When the screw rotates, it moves because the screw and the nut are compatible, which in turn moves the connecting tube and the mounting bracket.

[0018] Preferably, it also includes a base, on which a movable pedal is provided, and at the bottom of the base is a rotatable knob.

[0019] The pedal is provided with a screw rod 2 at the bottom, and a sleeve 2 is provided on the knob 2. The sleeve 2 is sleeved on the outside of the screw rod 2 and threadedly connected to the screw rod 2. By rotating the knob 2, the sleeve 2 is driven to rotate, thereby driving the screw rod 2 to move and driving the pedal to move.

[0020] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0021] This invention adapts the movement of the seat cushion to the rotation of the connecting frame. When the seat cushion is subjected to force and moves downward, it contacts the protrusion and presses it down, thereby causing the top of the connecting frame to move forward and the backrest to move forward, thus achieving the backrest to move forward and fit against the child's back. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0024] Figure 3 for Figure 2 An enlarged structural diagram of A in the diagram.

[0025] Figure 4 This is a schematic diagram showing a partial structural breakdown of the present invention.

[0026] Figure 5 This is a schematic diagram of the seat cushion's structure.

[0027] Figure 6 This is a schematic diagram of the structure of a gas spring and a rope.

[0028] Figure 7 This is a structural diagram of the headrest and backrest.

[0029] Figure 8 This is a schematic diagram of the screw and nut.

[0030] Figure 9 This is a schematic diagram of the pedal-related structure.

[0031] Reference numerals: 1-seat cushion; 11-armrest; 2-backrest; 3-mounting bracket; 31-mounting hole; 32-elongated hole; 33-connecting pipe; 34-bottom cover; 4-connecting bracket; 41-protrusion; 42-front shell; 43-rear shell;

[0032] 44-Connecting rod; 45-Assembly part; 46-Assembly base; 47-Elastic element; 481-Rod one;

[0033] 483-Rail 2; 485-Rail 3; 51-Connecting Rod 1; 52-Connecting Rod 2; 6-Gas Spring; 61-Main Body;

[0034] 62-Piston rod; 63-Connecting rod three; 64-Connector; 641-Sloping surface; 7-Base; 71-Fixing tube;

[0035] 72-Wheel; 73-Cover; 74-Connecting plate; 8-Pedal; 81-Screw two; 82-Bottom shell;

[0036] 91-Sleeve 1; 92-Nut; 93-Screw 1; 94-Shaft; 95-Knob 1; 97-Housing;

[0037] 10-Switch; 20-Headrest; 201-Mounting rod; 30-Rope; 40-Knob II; 401-Sleeve II;

[0038] 50-Staff. Detailed Implementation

[0039] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0040] like Figures 1-9 As shown, a gravity-guided backrest seat includes a seat cushion 1 and a backrest 2, as well as a mounting frame 3 and a connecting frame 4 located between the seat cushion 1 and the backrest 2. A retractable support component is provided between the bottom of the seat cushion 1 and the mounting frame 3, and the bottom of the connecting frame 4 is rotatably connected to the mounting frame 3. The backrest 2 is mounted on the connecting frame 4.

[0041] Meanwhile, the connecting frame 4 has a protrusion 41 on the side near the seat cushion 1. Therefore, in actual use, when the seat cushion 1 is subjected to force and moves down, the seat cushion 1 contacts the protrusion 41 and presses the protrusion 41 down, thereby causing the top of the connecting frame 4 to move forward and thus the backrest 2 to move forward, that is, the backrest 2 moves forward and fits against the child's back.

[0042] The seat cushion 1 moves downwards due to the child's weight, and armrests 11 are provided on both sides of the seat cushion 1.

[0043] Meanwhile, the structure of the support component is as follows: First, the support component includes a first link 51 and a second link 52, and the middle part of the first link 51 and the middle part of the second link 52 are rotatably connected. The two ends of the first link 51 and the two ends of the second link 52 are respectively connected to the seat cushion 1 and the mounting bracket 3, and this connection is a rotatable connection.

[0044] The connecting rod 2 52 has a hole for connecting rod 1 51 to pass through, and connecting rod 1 51 and connecting rod 2 52 are connected by bolts and nuts. The bolts and nuts only limit the movement and do not restrict the rotation.

[0045] Furthermore, a support 50 is provided at the bottom of the seat cushion 1, and a retractable support component is provided between the support 50 and the mounting bracket 3. The ends of the connecting rod 1 51 and the ends of the connecting rod 2 52 are connected to other components, namely the support 50 and the mounting bracket 3, by rods and bolts, and the rods and bolts only limit the movement and do not restrict the rotation.

[0046] like Figures 2-6As shown, a gas spring 6 is provided between the bottom of the seat cushion 1 and the mounting bracket 3. The gas spring 6 is used to reset the seat cushion 1 that has been lowered. The gas spring 6 includes a main body 61 and a piston rod 62, and the main body 61 is connected to the bottom of the seat cushion 1.

[0047] Meanwhile, the piston rod 62 has a swingable connecting rod 63 at the end away from the main body 61, and the other end of the connecting rod 63 is connected to the switch 10 at the bottom of the seat cushion 1 through the rope 30. By rotating the switch 10, the connecting rod 63 is driven to swing and then come into contact with the piston rod 62.

[0048] The contact between the connecting rod 63 and the piston rod 62 can drive the piston rod 62 to move, thereby having a certain fine-tuning effect, or opening the valve to balance the internal and external air pressure, thus preventing damage to the gas spring 6.

[0049] Furthermore, the piston rod 62 has a connector 64 at the end away from the main body 61, and the connector 64 has an inclined surface 641 inside, and the connecting rod 63 passes through the connector 64 and is located on the inclined surface 641.

[0050] like Figure 7 As shown, the structure of the connecting frame 4 is as follows: First, the connecting frame 4 includes a front shell 42 and a rear shell 43, and the front shell 42 is located inside the rear shell 43. The bottom of the front shell 42 and the bottom of the rear shell 43 are rotatably connected to the mounting frame 3. The bottom of the front shell 42 has a protrusion 41 on the side near the seat cushion 1.

[0051] Meanwhile, a connecting rod 44 is provided between the front shell 42 and the rear shell 43, and the top of the connecting rod 44 is connected to the top of the front shell 42 through an assembly 45, and the bottom of the connecting rod 44 is connected to the rear shell 43. The assembly 45 is connected to the backrest 2, and a headrest 20 is provided on the top of the rear shell 43.

[0052] Therefore, in actual use, the connection between the front shell 42 and the rear shell 43 is achieved by setting the connecting rod 44, thereby ensuring the synchronization of the two.

[0053] The structure of the connecting rod 44 is as follows: the connection between the connecting rod 44 and the assembly 45, and the connection between the rear shell 43 and the connecting rod 44, adopts a rod and bolt structure.

[0054] Furthermore, the headrest 20 is equipped with an installation rod 201, and the headrest 20 is installed by first inserting the installation rod 201 into the hole and fixing it with screws. At the same time, an assembly base 46 is provided between the assembly component 45 and the backrest 2, and an elastic element 47 is provided between the assembly base 46 and the backrest 2. The elastic element 47 can play a fine adjustment role, so that the backrest 2 can better fit the child's back.

[0055] like Figure 7As shown, the structure of the front shell 42 and the rear shell 43 is as follows: First, the top of the front shell 42 is located inside the assembly 45, and a rod 481 passes through the front shell 42, the assembly 45 and the rear shell 43 and is connected by a bolt, that is, one rod realizes the connection of multiple parts.

[0056] Meanwhile, the bottom of the front shell 42 is located inside the mounting bracket 3, and the rear shell 43 is located outside the mounting bracket 3. The mounting bracket 3 has mounting holes 31 and elongated holes 32 on both side walls. A second rod 483 passes through the front shell 42, the mounting holes 31 and the rear shell 43 and is connected to the front shell 42, the assembly 45 and the rear shell 43 with the help of a second bolt. A third rod 485 passes through the front shell 42, the elongated holes 32 and the rear shell 43 and is connected to the front shell 42, the assembly 45 and the rear shell 43 with the help of a third bolt. That is, one rod can connect multiple parts.

[0057] Therefore, in actual use, when the seat cushion 1 contacts the protrusion 41 and presses down on the protrusion 41, the rod 3 485 moves in the elongated hole 32 and drives the front shell 42 and the rear shell 43 to rotate around the axis of the rod 2 483.

[0058] like Figures 1-8 As shown, it also includes a base 7, and a movable mounting bracket 3 is provided on the base 7. The base 7 is provided with a fixing tube 71, and a connecting tube 33 is provided at the bottom of the mounting bracket 3. The bottom of the connecting tube 33 is located inside the fixing tube 71 and moves within the fixing tube 71.

[0059] Meanwhile, the fixed tube 71 has a sleeve 91 inside, and the top of the sleeve 91 is provided with a nut 92. The connecting tube 33 has a screw 93 inside, and one end of the screw 93 is connected to the rotating shaft 94 and rotates under the drive of the rotating shaft 94. The other end of the screw 93 is connected to the nut 92.

[0060] Therefore, in actual use, when the screw 93 rotates, the screw 93 is matched with the nut 92, which drives the screw 93 to move, thereby driving the connecting pipe 33 to move and the mounting bracket 3 to move.

[0061] One end of the rotating shaft 94 is connected to the knob 95, so the rotating shaft 94 is rotated by rotating the knob 95. The other end of the rotating shaft 94 is connected to the screw 93 by a bevel gear. A housing 97 is provided on the outside of the connection between the rotating shaft 94 and the screw 93, and the housing 97 is fixedly installed in the connecting tube 33. Therefore, the housing 97 facilitates connection and protects the internal structure.

[0062] Meanwhile, the bottom of the sleeve 91 is connected to the bottom of the fixed tube 71, and the bottom of the connecting tube 33 is also provided with a cover 73, so as to avoid the fixed tube 71 and the connecting tube 33 from directly contacting each other and causing wear and tear. The base 7 is also provided with a cover 73 corresponding to the fixed tube 71, and the fixed tube 71 and the cover 73 are set on the base 7 by screws. The bottom of the base 7 is provided with wheels 72, so as to facilitate the overall movement of the seat.

[0063] like Figure 9 As shown, it also includes a base 7, on which a movable pedal 8 is provided, and at the bottom of the base 7 is a rotatable knob 40. At the same time, at the bottom of the pedal 8, a screw 81 is provided, and at the knob 40, a sleeve 401 is provided, and the sleeve 401 is sleeved on the outside of the screw 81 and threadedly connected to the screw 81.

[0064] Therefore, in actual use, rotating the knob 40 will drive the sleeve 401 to rotate, which in turn will drive the screw 81 to move and drive the pedal 8 to move.

[0065] The pedal 8 has a bottom shell 82, which is fitted onto the outside of the sleeve 401 to protect the internal structure. The pedal 8 is movably mounted on the connecting plate 74, which is then fixed to the base 7 by screws.

[0066] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. However, this utility model is not limited to the above embodiments; therefore, various changes and modifications can be made without departing from the principles and scope of this utility model, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A gravity reclining seat, characterized by, The utility model relates to a chair, which comprises a seat cushion (1), a backrest (2), a mounting frame (3) and a connecting frame (4) between the seat cushion (1) and the backrest (2), wherein a telescopic support assembly is arranged between the bottom of the seat cushion (1) and the mounting frame (3), the bottom of the connecting frame (4) is rotatably connected with the mounting frame (3), and the backrest (2) is arranged on the connecting frame (4). The connecting frame (4) is provided with a protruding part (41) on the side close to the seat cushion (1), when the seat cushion (1) is forced to move downward, the seat cushion (1) contacts the protruding part (41) and presses the protruding part (41) downward, so that the top of the connecting frame (4) moves forward and the backrest (2) moves forward.

2. A gravity reclining seat as claimed in claim 1, wherein: The support assembly comprises a connecting rod one (51) and a connecting rod two (52), the middle part of the connecting rod one (51) is rotatably connected with the middle part of the connecting rod two (52), the two ends of the connecting rod one (51) and the two ends of the connecting rod two (52) are respectively connected with the seat cushion (1) and the mounting frame (3), and the connection is a rotatable connection.

3. A gravity reclining seat as claimed in claim 1, wherein: A gas spring (6) is arranged between the bottom of the seat cushion (1) and the mounting frame (3), the gas spring (6) is used for resetting the seat cushion (1) after the seat cushion (1) is moved downward, the gas spring (6) comprises a main body (61) and a piston rod (62), and the main body (61) is connected with the bottom of the seat cushion (1). The piston rod (62) is provided with an oscillatable connecting rod three (63) at the end away from the main body (61), the other end of the connecting rod three (63) is connected with a switch (10) at the bottom of the seat cushion (1) through a rope (30), the switch (10) is rotated to drive the connecting rod three (63) to oscillate and contact the piston rod (62).

4. A gravity reclining seat according to any one of claims 1-3, characterized in that: The connecting frame (4) comprises a front shell (42) and a rear shell (43), the front shell (42) is located in the rear shell (43), the bottom of the front shell (42) and the bottom of the rear shell (43) are rotatably connected with the mounting frame (3), and the bottom of the front shell (42) is provided with a protruding part (41) on the side close to the seat cushion (1). A connecting rod (44) is arranged between the front shell (42) and the rear shell (43), the top of the connecting rod (44) is connected with the top of the front shell (42) through an assembling part (45), the bottom of the connecting rod (44) is connected with the rear shell (43), the assembling part (45) is connected with the backrest (2), and the top of the rear shell (43) is provided with a headrest (20).

5. A gravity reclining seat as claimed in claim 4 wherein: The top of the front shell (42) is located in the assembling part (45), a rod one (481) passes through the front shell (42), the assembling part (45) and the rear shell (43) and cooperates with a bolt one to connect the front shell (42), the assembling part (45) and the rear shell (43). Or / and, the front shell (42) bottom is located in the mounting frame (3), and the rear shell (43) is located outside the mounting frame (3), the mounting frame (3) both sides are provided with mounting holes (31) and long holes (32), and the second rod (483) passes through the front shell (42), the mounting hole (31) and the rear shell (43) and cooperates with the second bolt to connect the front shell (42), the assembly (45) and the rear shell (43), and the third rod (485) passes through the front shell (42), the long hole (32) and the rear shell (43) and cooperates with the third bolt to connect the front shell (42), the assembly (45) and the rear shell (43); When the seat cushion (1) contacts the protruding part (41) and presses the protruding part (41) downward, the third rod (485) moves in the long hole (32) and drives the front shell (42) and the rear shell (43) to rotate around the axis of the second rod (483).

6. A gravity reclining seat as claimed in any one of claims 1 to 3, wherein: Also including a base (7), and the base (7) is provided with a movable mounting frame (3), the base (7) is provided with a fixed pipe (71), and the mounting frame (3) bottom is provided with a connecting pipe (33), and the connecting pipe (33) bottom is located in the fixed pipe (71) and moves in the fixed pipe (71); The fixed pipe (71) is provided with a sleeve (91), and the sleeve (91) top is provided with a nut (92), and the connecting pipe (33) is provided with a screw rod (93), one end of the screw rod (93) is connected with a rotating shaft (94) and rotates under the driving of the rotating shaft (94), and the other end of the screw rod (93) is connected with the nut (92), when the screw rod (93) rotates, the screw rod (93) is driven to move due to the matching of the screw rod (93) and the nut (92), thereby driving the connecting pipe (33) to move and driving the mounting frame (3) to move.

7. A gravity reclining seat as claimed in any one of claims 1 to 3, wherein: Also including a base (7), and the base (7) is provided with a movable mounting frame (3), the base (7) is provided with a fixed pipe (71), and the mounting frame (3) bottom is provided with a connecting pipe (33), and the connecting pipe (33) bottom is located in the fixed pipe (71) and moves in the fixed pipe (71); The connecting pipe (33) is provided with a screw rod (93), one end of the screw rod (93) is connected with a rotating shaft (94) and rotates under the driving of the rotating shaft (94), and the other end of the screw rod (93) is connected with the nut (92), when the screw rod (93) rotates, the screw rod (93) is driven to move due to the matching of the screw rod (93) and the nut (92), thereby driving the connecting pipe (33) to move and driving the mounting frame (3) to move.

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