Ventilation structure having movable closed tubing at folding location, and seat cushion

Abstract

The present invention relates to the field of seat cushions, and in particular to a seat cushion comprising an upper support frame, a lower support frame, an upper ventilation framework and a lower ventilation framework. The upper support frame, the lower support frame, the upper ventilation framework and the lower ventilation framework are encased in an outer sleeve. The upper support frame is provided with a first fan and a second fan, an outlet of the first fan facing the upper ventilation framework. A first connection tube is provided on the upper support frame, and a second connection tube is provided on the lower support frame, the first connection tube being movably connected to the second connection tube. An outlet of the second fan is in communication with the first connection tube, and an outlet of the second connection tube faces the lower ventilation framework. This achieves the goals of solving the problem of it being difficult for air to enter a hip pad via a folding location between the hip pad and a back pad, thus causing loss of ventilation, and providing more cushioning options for consumers.

Description

The folding part has a ventilation structure and seat cushion with movable closed pipes Technical Field

[0001] The present invention relates to the field of seat cushions, in particular to a ventilation structure and a seat cushion with a movable closed pipeline at a folding portion. Background Art

[0002] The ventilated seat cushion has a hip pad and a back pad, and is generally placed on a car seat, a boss chair or a seat with a backrest to play the role of ventilation and heat dissipation. Some functional seats are currently equipped with ventilation function. Because the seat and back of the seat are relatively thick, it is relatively easy to set ventilation ducts inside or at the bottom. However, adding a ventilation structure to the seat cushion is tricky because the seat cushion is thin and the folding part where the fixed duct is set is easily blocked due to folding when sitting.

[0003] The existing ventilated seat cushion includes a connected lower support frame and a seat cushion ventilation frame, a connected upper support frame and a back cushion ventilation frame, and is wrapped with a coat on the outside. The coat is closed on the outside, and through holes are provided on the wrapping cloth. By setting a fan, the fan works and blows out air from the through holes to achieve a ventilation effect.

[0004] There are mainly the following types of existing ventilated seat cushions. The first type: multiple fans are installed on the upper support frame (the human back is in an arc shape. When leaning back, the back cushion and the backrest are pressed tightly, and the fan inlet of the upper support frame will not be blocked). Several fan outlets blow toward the back cushion ventilation frame, and several fan outlets blow toward the seat cushion ventilation frame. Because when in use, the upper support frame and the lower support frame are folded to about 90 degrees. At the same time, after the human body sits down, the folded part (the two layers of coat on the front and back) are easily squeezed together due to the weight of the human body, causing airtightness, resulting in wind loss, and it is difficult to transport the air to the seat cushion ventilation frame.

[0005] The second type: multiple fans are installed on the upper support frame, and the fans blow toward the back cushion ventilation frame; multiple fans are installed on the lower support frame, and the fan outlets blow toward the seat cushion ventilation frame, avoiding the phenomenon that "the folding part is easily squeezed and airtight due to the weight of the human body, causing wind loss and difficulty in delivering wind to the seat cushion ventilation frame". However, on the one hand, when the fans are installed on the lower support frame, the lower support frame needs to be extended to install the fans. After extending the lower support frame, it is easy to hurt the buttocks. On the other hand, after the human body sits down, the hip pad (there is a fan inlet under the hip pad) and the seat are pressed tightly, and the fan inlet is easily blocked, resulting in difficulty in air intake.

[0006] The third type: The fan is installed on the seat cushion ventilation frame on the side away from the lower support frame. The wind passes through the lower seat cushion ventilation frame, the folding part, and the back cushion ventilation frame in turn. For the same reason, it is difficult for the wind to enter the back cushion ventilation frame through the folding part. Summary of the Invention

[0007] The purpose of the present invention is to address the shortcomings of the existing technology and, at least to a certain extent, solve the technical problems in the related technology, and provide a seat cushion to solve the problem of wind loss caused by the difficulty of wind entering the hip cushion from the folding point between the hip cushion and the back cushion, thereby providing consumers with an additional seat cushion option.

[0008] A ventilation structure with a movable closed pipe at the folding part of a seat cushion includes an upper support frame and a lower support frame. The upper support frame and the lower support frame are rotatably connected. The upper support frame is provided with a first opening, and the lower support frame is provided with a second opening. The first opening and the second opening are connected through a movable pipe. The movable pipe rotates or extends to adapt to the relative rotation of the upper support frame and the lower support frame. The first opening, the movable pipe, and the second opening are connected in sequence.

[0009] Furthermore, the movable pipeline is a flexible telescopic connecting sleeve, one end of the flexible telescopic connecting sleeve is connected to the first opening, and the other end is connected to the second opening. The relative rotation of the upper support frame and the lower support frame drives the flexible telescopic connecting sleeve to extend and retract in an arc shape, and the first opening, the flexible telescopic connecting sleeve, and the second opening are connected in sequence.

[0010] Furthermore, the upper support frame is provided with a first transfer tube, the lower support frame is provided with a second transfer tube, the first transfer tube and the second transfer tube are movably connected, the upper support frame and the lower support frame rotate relative to each other to drive the first transfer tube and the second transfer tube to rotate relative to each other, the first transfer tube is provided with the first opening, the second transfer tube is provided with the second opening, the first opening, the first transfer tube, the second transfer tube, and the second opening are connected in sequence.

[0011] A seat cushion comprises an upper support frame, a lower support frame, an upper ventilation frame and a lower ventilation frame, the upper support frame is provided with a first fan and a second fan, the outlet of the first fan faces the upper ventilation frame, the upper support frame and the lower support frame are rotatably connected, the upper support frame is provided with a first opening, the lower support frame is provided with a second opening, the first opening and the second opening are connected through a movable pipeline, the movable pipeline is rotated to adapt to the relative rotation of the upper support frame and the lower support frame, the first opening, the movable pipeline and the second opening are connected in sequence, the outlet of the second fan is connected to the first opening, and the second opening faces the lower ventilation frame. When working, the wind from the second fan is blown from the first opening, the movable pipeline and the second opening to the lower ventilation frame in sequence.

[0012] Furthermore, the upper support frame is provided with a first transfer tube, the side wall of the first transfer tube is provided with the first opening, the lower support frame is provided with a second transfer tube, the side wall of the second transfer tube is provided with the second opening, the first transfer tube and the second transfer tube are rotatably connected, the outlet of the second fan is connected to the first transfer tube through the first opening, the second opening of the second transfer tube is directed toward the lower ventilation frame, and when working, the wind from the second fan is blown from the first opening, the first transfer tube, the second transfer tube, and the second opening to the lower ventilation frame in sequence

[0013] Furthermore, the upper support frame is provided with two first air guide strips, one end of the two first air guide strips is respectively located on both sides of the second fan outlet, and the other ends extend to connect to the first transfer tube and are respectively located on both sides of the first opening. A first cover plate is fixed on the first air guide strip for sealing the cavity between the two first air guide strips and the first opening. The bottom surface of the upper support frame, the two first air guide strips, and the first cover plate form a first transition air cavity, and the outlet of the second fan is connected to the first transfer tube through the first transition air cavity.

[0014] Furthermore, the first transfer tube includes a first arc-shaped piece and a first half tube connected to the upper support frame. The first arc-shaped piece and the first half tube are connected by a single-piece integrated hinge. The first transfer tube formed when the first arc-shaped piece and the first half tube are buckled together has the first opening.

[0015] Furthermore, the lower support frame is provided with two second air guide strips, one end of the two second air guide strips is respectively connected to the second transfer tube and is located on both sides of the second opening, and the other end extends parallel or in a trumpet shape to the lower ventilation frame. A second cover plate is fixed on the two second air guide strips for sealing the cavity between the two second air guide strips and the second opening. The bottom surface of the lower support frame, the two second air guide strips, and the second cover plate form a second transition air cavity, and the outlet of the second transition air cavity faces the lower ventilation frame.

[0016] Furthermore, the second transfer tube includes a second arc-shaped piece and a second half tube connected to the lower support frame. The second arc-shaped piece and the second half tube are connected by a single-piece integrated hinge. When the second arc-shaped piece and the second half tube are buckled together, a second transfer tube is formed with the second opening.

[0017] Furthermore, the upper support frame is provided with two third air guide strips, one end of the two third air guide strips is located on both sides of the outlet of the first fan, and the other end extends parallel or in a trumpet shape to close to the upper ventilation frame. The upper support frame is fixed with a third cover plate for sealing the cavity between the two third air guide strips. The bottom surface of the upper support frame, the two third air guide strips, and the third cover plate form a third transition air cavity, and the outlet of the third transition air cavity faces the upper ventilation frame.

[0018] Furthermore, one end of the first transfer tube is closed and the other end has a circular opening; one end of the second transfer tube is closed and the other end has a circular opening, and the end portion of the first transfer tube with the circular opening extends into the circular opening of the second transfer tube, and the outer wall of the circular opening of the first transfer tube is adapted to the inner wall of the circular opening of the second transfer tube.

[0019] Furthermore, the upper support frame is provided with a plurality of first protrusions, and the lower support frame is provided with a plurality of second protrusions. After installation, the first protrusions and the second protrusions are arranged alternately, the second protrusions are provided with a boss, and the first protrusions are provided with a limiting groove adapted to the boss. The plurality of bosses are located on the same straight line, the bosses are limited in the limiting grooves and the bosses rotate in the limiting grooves, forming a rotating connection between the upper support frame and the lower support frame.

[0020] Furthermore, a step is provided on the inner wall of the circular opening of the second adapter tube, and an end portion of the first adapter tube having the circular opening extends into the circular opening of the second adapter tube and abuts against the step.

[0021] Furthermore, the upper support frame is connected to the upper ventilation frame, the upper support frame is provided with an elastic column, the elastic column includes a column portion and two elastic sheets connected to the column portion, and the upper ventilation frame is provided with a positioning hole adapted to the elastic column; the lower support frame is connected to the lower ventilation frame, the lower support frame is provided with an elastic column, the elastic column includes a column portion and two elastic sheets connected to the column portion, and the lower ventilation frame is provided with a positioning hole adapted to the elastic column.

[0022] Furthermore, the upper support frame, lower support frame, upper ventilation frame and lower ventilation frame are wrapped with a jacket, one side of the jacket is provided with a plurality of air outlet holes, the other side is provided with air inlet holes at the air inlet of the first fan and the second fan, and the third cover plate is provided with a plurality of arc-shaped support strips.

[0023] The technical effects of the present invention are mainly reflected in the following aspects:

[0024] 1: The seat cushion folding part has a ventilation structure with a movable closed pipe. The first opening and the second opening are connected through a movable pipe, so that the first opening, the movable pipe and the second opening are connected in sequence, so that the back cushion and the seat cushion are interconnected, and the folding part is prevented from being blocked.

[0025] 2: Through the design of the present invention, the wind from the first fan is blown to the upper ventilation frame through the third transition air cavity, and the upper ventilation frame is wrapped by the outer coat on all sides, and then discharged from the air outlet to ventilate the back. The wind from the second fan is blown into the lower ventilation frame from the first transition air cavity, the first transfer tube, the second transfer tube, and the second transition air cavity in sequence, and the lower ventilation frame is wrapped by the outer coat on all sides, and then discharged from the air outlet to ventilate the buttocks, preventing the seat cushion and the coaster from being blocked at the folding part, thereby improving the ventilation effect.

[0026] 3: The present invention realizes a ventilation structure at the folding hinge by rotatably connecting the upper support frame and the lower support frame, utilizing the first protrusion and the second protrusion to provide space for the first transfer tube and the second transfer tube (soft telescopic connecting sleeve), and rotatably connecting the first transfer tube and the second transfer tube, thereby preventing wind from being blocked at the folding position. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a schematic diagram of the folded structure of the present invention;

[0028] FIG2 is a schematic diagram of the back side of the upper support frame, the lower support frame, the upper ventilation frame and the lower ventilation frame after being connected;

[0029] FIG3 is a front view of the upper support frame, the lower support frame, the upper ventilation frame and the lower ventilation frame after being connected;

[0030] FIG4 is a front view of the rotational connection between the upper support frame and the lower support frame;

[0031] FIG5 is a schematic diagram of the reverse side of the upper support frame and the lower support frame being rotatably connected;

[0032] FIG6 is a schematic structural diagram of an upper support frame protruding from a first opening;

[0033] FIG7 is a schematic structural diagram of the protruding elastic column of the upper support frame;

[0034] Figure 8 is a schematic structural diagram of the upper support frame protruding limit groove;

[0035] Figure 9 is a schematic structural diagram of the lower support frame;

[0036] Figure 10 is a schematic structural diagram of the upper ventilation frame;

[0037] FIG11 is a schematic cross-sectional view of the socket connection between the first adapter tube and the second adapter tube.

[0038] FIG12 is a schematic structural diagram of the rotatable connection between the upper support frame and the lower support frame in Example 1. FIG.

[0039] FIG13 is a schematic structural diagram of Example 1 showing a side of the flexible telescopic connecting sleeve with a smaller telescopic range.

[0040] FIG14 is a schematic structural diagram of the side of the flexible telescopic connecting sleeve with a larger telescopic range in Example 1. FIG.

[0041] FIG15 is a schematic diagram of the structure after the lower support frame is installed and fastened.

[0042] FIG16 is a schematic structural diagram of the lower support frame after it is unfolded.

[0043] FIG17 is a schematic diagram of the structure after the upper support frame is installed and fastened.

[0044] FIG18 is a schematic structural diagram of the upper support frame after it is unfolded.

[0045] Figure numerals: 1. upper support frame; 2. lower support frame; 3. upper ventilation frame; 4. lower ventilation frame; 5. outer jacket; 51. air outlet; 11. first fan; 12. first fan; 13. first transfer tube; 21. second transfer tube; 14. first protrusion; 15. second protrusion; 141. limiting groove; 151. boss; 211. step; 16. first air guide strip; 22. second air guide strip; 17. third air guide strip; 161. first cover plate; 221. second cover plate; 18. third cover plate; 01 elastic column; 02. positioning hole; 03. column; 04. elastic sheet; 006. first opening; 007. second opening; 001. first arc-shaped sheet; 002. first half pipe; 003. second arc-shaped sheet; 004. second half pipe; 005. arc-shaped support strip; 008. flexible telescopic connecting sleeve. Implementation Method

[0046] The embodiments of the present invention are described in detail below for the purpose of explaining the present invention so as to make the technical solutions of the present invention easier to understand and grasp, but are not to be construed as limiting the present invention. Example

[0047] As shown in Figures 12, 13 and 14: A ventilation structure with a movable closed pipe at the folding part of the seat cushion includes an upper support frame 1 and a lower support frame 2. The upper support frame 1 and the lower support frame 2 are rotatably connected. The upper support frame 1 is provided with a first opening 006, and the lower support frame 2 is provided with a second opening 007. The first opening 006 and the second opening 007 are connected through a movable pipe. The movable pipe rotates or telescopes to adapt to the relative rotation of the upper support frame 1 and the lower support frame 2. The first opening 006, the movable pipe and the second opening 007 are connected in sequence.

[0048] The movable pipeline means that when the upper support frame 1 and the lower support frame 2 are rotated to the sitting position (about 90 degrees), the movable pipeline can adjust its position accordingly to prevent blockage at the folding position, thereby achieving effective communication between the first opening 006 and the second opening 007. For example, when an ordinary hose is folded to about 90 degrees (sitting position), the folding position is easily blocked.

[0049] The movable pipeline is a soft telescopic connecting sleeve 008, one end of the soft telescopic connecting sleeve 008 is connected to the first opening 006 and the sleeve is fixed, and the other end of the sleeve is connected to the second opening 007 and the sleeve is fixed. The upper support frame 1 and the lower support frame 2 rotate relative to each other to drive the soft telescopic connecting sleeve 008 to extend and retract in an arc, as shown in Figure 13: one side has a small extension amplitude, as shown in Figure 14: the other side has a large extension amplitude, thereby forming an arc-shaped extension, ensuring that the first opening 006, the soft telescopic connecting sleeve 008, and the second opening 007 are connected in sequence, so that the back cushion (upper support frame 1) and the seat cushion (lower support frame 2) are interconnected, and the anti-folding part is blocked. Example

[0050] This embodiment is basically the same as embodiment 1, with the only difference being that, as shown in Figures 4, 5, 6, 7, 8 and 9: a first transfer tube 13 is provided on the upper support frame 1, and a second transfer tube 21 is provided on the lower support frame 2. The first transfer tube 13 and the second transfer tube 21 are movably connected, and the upper support frame 1 and the lower support frame 2 rotate relative to each other to drive the first transfer tube 13 and the second transfer tube 21 to rotate relative to each other. The first transfer tube 13 is provided with the first opening 006, and the second transfer tube 21 is provided with the second opening 007, ensuring that the first opening 006, the first transfer tube 13, the second transfer tube 21 and the second opening 007 are connected in sequence, so that the back cushion (upper support frame 1) and the seat cushion (lower support frame 2) are interconnected, and the anti-folding part is blocked. Example

[0051] A seat cushion comprises an upper support frame 1, a lower support frame 2, an upper ventilation frame 3 and a lower ventilation frame 4, the upper support frame 1 is provided with a first fan 11 and a second fan 12, the outlet of the first fan 11 faces the upper ventilation frame 3, and is characterized in that: the upper support frame 1 and the lower support frame 2 are rotatably connected, the upper support frame 1 is provided with a first opening 006, the lower support frame 2 is provided with a second opening 007, the first opening 006 and the second opening 007 are connected through a movable pipeline, and the movable pipeline is rotated to adapt to the relative rotation of the upper support frame 1 and the lower support frame 2, the first opening 006, the movable pipeline, and the second opening 007 are connected in sequence, the outlet of the second fan 12 is connected to the first opening 006, and the second opening 007 faces the lower ventilation frame 4. When working, the wind of the second fan 12 is blown from the first opening 006, the movable pipeline, and the second opening 007 to the lower ventilation frame 4 in sequence.

[0052] Specifically, as shown in Figures 1, 2, 3, 4 and 5: a seat cushion comprises an upper support frame 1 and a lower support frame 2, an upper ventilation frame 3, and a lower ventilation frame 4. Preferably, the upper support frame 1 and the lower support frame 2 are made of plastic, and the upper ventilation frame 3 and the lower ventilation frame 4 are hollow frames. The upper support frame 1, the lower support frame 2, the upper ventilation frame 3, and the lower ventilation frame 4 are wrapped with a coat 5. Preferably, the coat 5 is made of airtight leather or cloth, and a plurality of air outlets 51 are provided on the hip pad and the back pad of the coat 5 where they fit the buttocks and back respectively, for ventilating the buttocks and back of the human body, and air inlets are provided at the air inlets (at the grille) of the coat 5 where they fit the first fan 11 and the second fan 12 to facilitate air intake. The upper support frame 1 is provided with a first fan 11 and a second fan 12, and the first fan The outlet of 11 faces the upper ventilation frame 3, so that the wind of the first fan 11 blows into the upper ventilation frame 3, the upper support frame 1 is provided with a first transfer tube 13, and the side wall of the first transfer tube 13 is provided with the first opening (006), the lower support frame 2 is provided with a second transfer tube 21, and the side wall of the second transfer tube (21) is provided with the second opening (007), the first transfer tube 13 and the second transfer tube 21 are movably connected, the outlet of the second fan 12 is connected to the first transfer tube 13 through the first opening (006), and the second opening (007) of the second transfer tube 21 faces the lower ventilation frame 4. When working, the wind of the second fan 12 is blown into the lower ventilation frame 4 from the first opening (006), the first transfer tube 13, the second transfer tube 21, and the second opening (007) in sequence.

[0053] As shown in Figures 4 and 5, the upper support frame 1 and the lower support frame 2 are preferably rotatably connected. When the upper support frame 1 and the lower support frame 2 rotate relative to each other, the first transfer tube 13 and the second transfer tube 21 are driven to rotate relative to each other. With this design, when in use, under the influence of the human buttocks and back, the hip pad and the back pad can be freely rotated and adjusted as the angle of the seat backrest changes.

[0054] As shown in Figures 6, 7, 8 and 9: the specific rotation method is that the upper support frame 1 is provided with several first protrusions 14, and the lower support frame 2 is provided with several second protrusions 15. After installation, the first protrusions 14 and the second protrusions 15 are arranged alternately. The purpose is to provide a setting space for the first transfer tube 13 and the second transfer tube 21. The second protrusion 15 is provided with a boss 151, and the first protrusion 14 is provided with a limiting groove 141 adapted to the boss 151. Several bosses 151 are located on the same straight line, the boss 151 is limited in the limiting groove 141 and the boss 151 rotates in the limiting groove 141, thereby forming a rotation connection between the upper support frame 1 and the lower support frame 2 relative to the straight line where the several bosses 151 are located. At the same time, the first transfer tube 13 and the second transfer tube 21 rotate relative to the straight line where the several bosses 151 are located.

[0055] When the upper support frame 1 and the lower support frame 2 are installed, the first transfer tube 13 only extends a little into the second transfer tube 21, so that the first transfer tube 13 and the second transfer tube 21 are first connected, so that the protrusion 151 on one side is pressed into the limiting groove 141, and relying on the performance of the plastic, the upper support frame 1 and the lower support frame 2 are relatively bent so that the protrusion 151 on the other side is pressed into the limiting groove 141.

[0056] As shown in Figures 1 to 11: Through the design of the present invention, the wind from the first fan 11 is blown to the upper ventilation frame 3 through the third transition air cavity, and the upper ventilation frame 3 is wrapped by the outer coat 5 on all sides, and then discharged from the air outlet 51 for back ventilation. The wind from the second fan 12 is blown into the lower ventilation frame 4 from the first transition air cavity, the first transfer tube 13, the second transfer tube 21, and the second transition air cavity in sequence, and the lower ventilation frame 4 is wrapped by the outer coat 5 on all sides, and then discharged from the air outlet 51 for buttocks ventilation, preventing wind from being blocked at the folding part of the seat cushion and the coaster, thereby improving the ventilation effect.

[0057] The present invention realizes a ventilation structure at the folding hinge by rotatably connecting the upper support frame 1 and the lower support frame 2, utilizing the first protrusion 14 and the second protrusion 15 to provide space for the first transfer tube and the second transfer tube, and rotatably connecting the first transfer tube and the second transfer tube, thereby preventing wind from being blocked at the folding position.

[0058] As shown in Figures 6, 7, 8 and 9: one end of the first transfer tube 13 is closed and the other end has a circular opening; one end of the second transfer tube 21 is closed and the other end has a circular opening. The end portion of the first transfer tube 13 with the circular opening extends into the circular opening of the second transfer tube 21, and the outer wall of the circular opening of the first transfer tube 13 is adapted to the inner wall of the circular opening of the second transfer tube 21. The adaptation is preferably such that the outer diameter of the outer wall of the circular opening of the first transfer tube 13 is the same as the inner diameter of the inner wall of the circular opening of the second transfer tube 21, so as to achieve the goal of preventing air leakage when the first transfer tube 13 and the second transfer tube 21 rotate relative to each other.

[0059] As shown in Figures 9 and 11: a step 211 is provided on the inner wall of the circular opening of the second adapter tube 21. One end portion of the first adapter tube 13 with a circular opening extends into the circular opening of the second adapter tube 21 and abuts against the step 211. The purpose of the step 211 is not only to serve as a limit, but also to form a narrow space between the first protrusion 14 and the second protrusion 15 to ensure the wall thickness of the second sleeve tube and the size of the first sleeve tube. Because of the relatively narrow space, if they are directly connected, either the wall thickness of the second sleeve tube will be reduced, which is not conducive to structural strength, or the inner diameter of the first sleeve tube will be made smaller, which is not conducive to wind flow.

[0060] As shown in Figures 2, 3, 5, 6 and 7: the outlet of the second fan 12 is connected to the first transfer tube 13, and a first opening 006 is opened on the side wall of the first transfer tube 13. The upper support frame 1 is provided with two first air guide strips 16, and one end of the two first air guide strips 16 is respectively located on both sides of the outlet of the second fan 12. In order to block both sides of the outlet of the second fan 12 and guide the wind between the two first air guide strips 16, the other end extends to connect to the first transfer tube 13 and is located on both sides of the first opening 006. In order to block both sides of the first opening 006 and guide the wind into the first opening 006, a first cover plate 161 for sealing the cavity between the two first air guide strips 16 and the first opening 006 is fixed on the first air guide strip 16. The upper support frame 1, the two first air guide strips 16 and the first cover plate 161 form a first transition air cavity. The outlet of the second fan 12 is connected to the first transfer tube 13 through the first transition air cavity.

[0061] As shown in Figures 2, 3, 5 and 9: the outlet of the second transfer tube 21 faces the lower ventilation frame 4, and a second opening is provided on the side wall of the second transfer tube 21. The lower support frame 2 is provided with two second air guide strips 22, and one end of the two second air guide strips 22 is respectively connected to the second transfer tube 21 and is located on both sides of the second opening. In order to block the two sides of the second opening and guide the wind between the two second air guide strips 22, the other end extends parallel or in a trumpet shape to the lower ventilation frame 4. The trumpet shape can gradually become larger or gradually become smaller, preferably a gradually larger trumpet shape, so that the amount of air entering the lower ventilation frame 4 is sufficient, and a second cover plate 221 is fixed on the two second air guide strips 22 for sealing the cavity between the two second air guide strips 22 and the second opening. The lower support frame 2, the two second air guide strips 22, and the second cover plate 221 form a second transition air cavity, and the outlet of the second transition air cavity faces the lower ventilation frame 4.

[0062] As shown in Figures 2, 3, 5, 6 and 7: the outlet of the first fan 11 faces the upper ventilation frame 3, and the upper support frame 1 is provided with two third air guide strips 17. One end of the two third air guide strips 17 is located on both sides of the outlet of the first fan 11. In order to block both sides of the outlet of the first fan 11 and guide the wind between the two third air guide strips 17, the other end extends parallel or in a trumpet shape close to the upper ventilation frame 3. The trumpet shape can gradually become larger or gradually become smaller, preferably a gradually larger trumpet shape, so that the air volume entering the upper ventilation frame 3 is sufficient, and the upper support frame 1 is fixed with a third cover plate 18 for blocking the cavity between the two third air guide strips 17. The third cover plate 18 is also used to fix the first fan and the second fan. A grille is also provided on the third cover plate 18 at the air inlet of the first fan 11 and the second fan 12 to facilitate air intake. The upper support frame 1, the two third air guide strips 17 and the third cover plate 18 form a third transition air cavity, and the outlet of the third transition air cavity faces the upper ventilation frame 3.

[0063] As shown in Figures 5, 7 and 10: the upper support frame 1 is connected to the upper ventilation frame 3, the upper support frame 1 is provided with an elastic column 01, the elastic column 01 includes a column portion 03 and two elastic sheets 04 connected to the column portion 03, the upper ventilation frame 3 is provided with a positioning hole 02 adapted to the elastic column 01, initially, the two elastic sheets 04 expand outward and squeeze inward, and the positioning hole 02 is reset after it is positioned on the column portion 03, which facilitates the connection and installation; the lower support frame 2 is connected to the lower ventilation frame 4, the lower support frame 2 is provided with an elastic column, the elastic column 01 includes a column portion 03 and two elastic sheets connected to the column portion 03, the lower ventilation frame 4 is provided with a positioning hole 02 adapted to the elastic column 01, initially, the two elastic sheets 04 expand outward and squeeze inward, and the positioning hole 02 is reset after it is positioned on the column portion 03, which facilitates the connection and installation.

[0064] As shown in the figure and Figure 2: the upper support frame 1, the lower support frame 2, the upper ventilation frame 3, and the lower ventilation frame 4 are wrapped with a coat 5, and a plurality of air outlet holes 51 are provided on one side of the coat 5. A plurality of air outlet holes 51 are provided on the hip pad and the back pad of the coat 5 that fit the buttocks and back respectively to ventilate the buttocks and back of the human body. An air inlet is provided on the other side that fits the air inlet of the first fan 11 and the second fan 12. The air inlet is located at the backrest that fits the seat. The back of the human body is in an arc shape. When leaning back, the back pad and the backrest are pressed tightly, and the fan inlet of the upper support frame will not be blocked, which facilitates the air intake of the fan. In order to further prevent the air inlet from being blocked, a plurality of arc-shaped support strips 005 are provided on the third cover plate 18 to increase the gap and prevent the air inlet from being blocked. Example

[0065] This embodiment is basically the same as embodiment 3, with the only difference being that, as shown in Figures 17 and 18: the first transfer tube 13 includes a first arc-shaped piece 001 and a first half-tube 002 connected to the upper support frame 1, the first arc-shaped piece 001 and the first half-tube 002 are connected by a single-piece integrated hinge, which is one of the 19 connection technologies for plastics. The first transfer tube 13 formed by the first arc-shaped piece 001 and the first half-tube 002 being fastened together has the first opening 006, and the first arc-shaped piece 001 and the first cover plate 161 can be integrally formed or produced in two molds.

[0066] This embodiment has all the technical effects of embodiment 3. Because the first protrusions 14 are provided on both the left and right sides of the first transfer tube 13, in order to facilitate the demolding of the upper support frame 1 at the first transfer tube 13, there is no need for core pulling. The structure of this embodiment can be adopted and production can be carried out using the upper and lower molds. Example

[0067] This embodiment is basically the same as embodiment 3 or embodiment 4, with the only difference being, as shown in Figures 15 and 16: the second transfer tube 21 includes a second arc-shaped piece 003 and a second half-tube 004 connected to the lower support frame 2, the second arc-shaped piece 003 and the second half-tube 004 are connected by a single-piece integrated hinge, which is one of the 19 connection technologies for plastics, and the second arc-shaped piece 003 and the second half-tube 004 are fastened together to form a second transfer tube 21 having the second opening 007, and the second arc-shaped piece 003 and the second cover plate 18 can be integrally formed or processed in two molds.

[0068] This embodiment has all the technical effects of embodiment 3 or embodiment 4. Because the second protrusions 15 are provided on both the left and right sides of the first transfer tube 13, in order to facilitate the demolding of the lower support frame 2 at the second transfer tube 21, there is no need for core pulling. The structure of this embodiment can be adopted and production can be carried out using the upper and lower molds.

[0069] Of course, the above are only typical examples of the present invention. In addition, the present invention may also have many other specific implementation methods. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A ventilation structure with a movable closed pipeline at the folding part of a seat cushion, comprising an upper support frame (1) and a lower support frame (2), characterized in that: The upper support frame (1) and the lower support frame (2) are rotatably connected, the upper support frame (1) is provided with a first opening (006), the lower support frame (2) is provided with a second opening (007), the first opening (006) and the second opening (007) are connected via a movable pipeline, the movable pipeline is adapted to the relative rotation of the upper support frame (1) and the lower support frame (2) by rotating or extending, and the first opening (006), the movable pipeline and the second opening (007) are connected in sequence.

2. A ventilation structure with a movable closed pipeline at the folding part of a seat cushion according to claim 1, characterized in that: The movable pipeline is a flexible telescopic connection sleeve (008), one end of the flexible telescopic connection sleeve (008) is connected to the first opening (006), and the other end is connected to the second opening (007). The upper support frame (1) and the lower support frame (2) rotate relative to each other to drive the flexible telescopic connection sleeve (008) to expand and contract in an arc shape, and the first opening (006), the flexible telescopic connection sleeve (008), and the second opening (007) are connected in sequence.

3. The ventilation structure of the movable closed pipeline at the folding part of the seat cushion according to claim 1, characterized in that: The upper support frame (1) is provided with a first transfer tube (13), and the lower support frame (2) is provided with a second transfer tube (21); the first transfer tube (13) and the second transfer tube (21) are movably sleeved; the upper support frame (1) and the lower support frame (2) rotate relative to each other to drive the first transfer tube (13) and the second transfer tube (21) to rotate relative to each other; the first transfer tube (13) is provided with the first opening (006), and the second transfer tube (21) is provided with the second opening (007); the first opening (006), the first transfer tube (13), the second transfer tube (21), and the second opening (007) are sequentially connected.

4. A seat cushion, comprising an upper support frame (1), a lower support frame (2), an upper ventilation frame (3) and a lower ventilation frame (4), wherein the upper support frame (1) is provided with a first fan (11) and a second fan (12), and an outlet of the first fan (11) faces the upper ventilation frame (3), and is characterized in that: The upper support frame (1) and the lower support frame (2) are rotatably connected, the upper support frame (1) is provided with a first opening (006), the lower support frame (2) is provided with a second opening (007), the first opening (006) and the second opening (007) are connected via a movable pipeline, the movable pipeline is rotated to adapt to the relative rotation of the upper support frame (1) and the lower support frame (2), the first opening (006), the movable pipeline, and the second opening (007) are connected in sequence, the outlet of the second fan (12) is connected to the first opening (006), and the second opening (007) faces the lower ventilation frame (4), and when working, the wind of the second fan (12) is blown from the first opening (006), the movable pipeline, and the second opening (007) to the lower ventilation frame (4) in sequence.

5. A seat cushion according to claim 4, characterized in that: The upper support frame (1) is provided with a first transfer tube (13), and the side wall of the first transfer tube (13) is provided with the first opening (006). The lower support frame (2) is provided with a second transfer tube (21), and the side wall of the second transfer tube (21) is provided with the second opening (007). The first transfer tube (13) and the second transfer tube (21) are rotatably sleeved. The outlet of the second fan (12) is connected to the first transfer tube (13) through the first opening (006), and the second opening (007) of the second transfer tube (21) faces the lower ventilation frame (4). When in operation, the wind of the second fan (12) is blown toward the lower ventilation frame (4) from the first opening (006), the first transfer tube (13), the second transfer tube (21), and the second opening (007) in sequence.

6. A seat cushion according to claim 5, characterized in that: The upper support frame (1) is provided with two first air guide strips (16), one end of the two first air guide strips (16) is respectively located on both sides of the outlet of the second fan (12), and the other ends are respectively extended to connect to the first transfer tube (13) and are located on both sides of the first opening (006), a first cover plate (161) for sealing the cavity between the two first air guide strips (16) and the first opening (006) is fixed on the first air guide strip (16), the bottom surface of the upper support frame (1), the two first air guide strips (16), and the first cover plate (161) form a first transition air cavity, and the outlet of the second fan (12) is connected to the first transfer tube (13) through the first transition air cavity.

7. A seat cushion according to claim 6, characterized in that: The first transfer tube (13) comprises a first arc-shaped piece (001) and a first half tube (002) connected to the upper support frame (1); the first arc-shaped piece (001) and the first half tube (002) are connected via a single-piece integrated hinge; the first transfer tube (13) formed by the first arc-shaped piece (001) and the first half tube (002) being buckled together has the first opening (006).

8. The seat cushion according to claim 5, characterized in that: The lower support frame (2) is provided with two second air guide strips (17), one end of the two second air guide strips (17) is respectively connected to the second transfer tube (21) and is located on both sides of the second opening (007), and the other end extends parallel to or in a trumpet shape to a position close to the lower ventilation frame (4), and a second cover plate (18) for sealing the cavity between the two second air guide strips (17) and the second opening (007) is fixed on the two second air guide strips (17), and the bottom surface of the lower support frame (2), the two second air guide strips (17), and the second cover plate (18) form a second transition air cavity, and the outlet of the second transition air cavity faces the lower ventilation frame (4).

9. The seat cushion according to claim 8, characterized in that: The second transfer tube (21) comprises a second arc-shaped piece (003) and a second half tube (004) connected to the lower support frame (2); the second arc-shaped piece (003) and the second half tube (004) are connected via a single-piece integrated hinge; the second arc-shaped piece (003) and the second half tube (004) are buckled together to form a second transfer tube (21) having the second opening (007).

10. The seat cushion according to claim 4, characterized in that: The upper support frame (1) is provided with two third air guide strips (17), one end of the two third air guide strips (17) is located on both sides of the outlet of the first fan (11), and the other end extends parallel or in a trumpet shape to the vicinity of the upper ventilation frame (3), and the upper support frame (1) is fixed with a third cover plate (18) for sealing the cavity between the two third air guide strips (17), and the bottom surface of the upper support frame (1), the two third air guide strips (17), and the third cover plate (18) form a third transition air cavity, and the outlet of the third transition air cavity faces the upper ventilation frame (3).

11. The seat cushion according to claim 5, characterized in that: The first adapter tube (13) is closed at one end and has a circular opening at the other end; the second adapter tube (21) is closed at one end and has a circular opening at the other end; the end portion of the first adapter tube (13) having the circular opening extends into the circular opening of the second adapter tube (21); the outer wall of the circular opening of the first adapter tube (13) fits with the inner wall of the circular opening of the second adapter tube (21).

12. A seat cushion according to claim 4 or 11, characterized in that: The upper support frame (1) is provided with a plurality of first protrusions (14), and the lower support frame (2) is provided with a plurality of second protrusions (15). After installation, the first protrusions (14) and the second protrusions (15) are arranged alternately, the second protrusions (15) are provided with protruding columns (151), and the first protrusions (14) are provided with limiting grooves (141) adapted to the protruding columns (151). The plurality of protruding columns (151) are located on the same straight line, the protruding columns (151) are limited in the limiting grooves (141) and the protruding columns (151) rotate in the limiting grooves (141), thereby forming a rotational connection between the upper support frame (1) and the lower support frame (2).

13. The seat cushion according to claim 12, characterized in that: A step (211) is provided on the inner wall of the circular opening of the second adapter tube (21); an end portion of the first adapter tube (13) having the circular opening extends into the circular opening of the second adapter tube (21) and abuts against the step (211).

14. The seat cushion according to claim 4, characterized in that: The upper support frame (1) is connected to an upper ventilation frame (3), the upper support frame (1) is provided with an elastic column (01), the elastic column (01) comprises a column portion (03) and two elastic sheets (04) connected to the column portion (03), and the upper ventilation frame (3) is provided with a positioning hole (02) adapted to the elastic column (01); the lower support frame (2) is connected to a lower ventilation frame (4), the lower support frame (2) is provided with an elastic column (01), the elastic column (01) comprises a column portion (03) and two elastic sheets (04) connected to the column portion (03), and the lower ventilation frame (4) is provided with a positioning hole (02) adapted to the elastic column (01).

15. The seat cushion according to claim 10, characterized in that: The upper support frame (1), the lower support frame (2), the upper ventilation frame (3), and the lower ventilation frame (4) are wrapped with a jacket (5); a plurality of air outlet holes (51) are provided on one side of the jacket (5); air inlet holes are provided on the other side at the air inlets of the first fan (11) and the second fan (12); and a plurality of arc-shaped support strips are provided on the third cover plate (18).

Images