A backrest frame adjustable seat frame

Abstract

The utility model relates to a seat frame capable of adjusting the swing direction of back cushion frame. A seat frame capable of adjusting the back cushion frame, comprising a bottom frame, a seat cushion frame and a back cushion frame, characterized in that the seat cushion frame and the back cushion frame are hingedly connected, a gas pressure rod is arranged between the back cushion frame and the seat cushion frame, the gas pressure rod comprises a push rod, a top column and an outer rod, the outer rod is hingedly connected to the back cushion frame, the top column is arranged on the push rod, a rod sleeve is fixedly installed at the tail end of the push rod, the seat cushion frame is hingedly connected to the rod sleeve, a push plate capable of swinging slightly on the rod sleeve is installed on the rod sleeve, and the push plate is tightly abutted against the top column at one end. The utility model provides a seat frame, which controls the swing of the back cushion frame movably arranged on the seat cushion frame through the gas pressure rod, so that the back cushion frame after the seat cushion frame is swung into a lying state can be further swung downward to form a lying posture of the seat frame, so that the user can obtain a more comfortable use experience.

Description

Technical Field

[0001] This utility model relates to a seat frame with an adjustable backrest. Background Technology

[0002] To provide a better user experience, chairs are often designed with modules, such as adjustable seat cushions, allowing users to customize the chair for greater comfort when resting. Chairs typically include a backrest frame, with a cushion mounted on it to provide comfort for the user's back. However, the backrest frame is usually fixed to the seat cushion frame, meaning that once the user has reclined the seat, they cannot also adjust the backrest to create a reclining position, thus failing to achieve the desired level of comfort. Therefore, the applicant has developed a chair frame structure with an adjustable backrest frame that is independent of the seat cushion frame. Utility Model Content

[0003] This utility model provides a seat frame with an adjustable backrest frame that is movably mounted on the seat cushion frame by a pneumatic rod. This allows the backrest frame, after the seat cushion frame is in a flat position, to be further lowered to a reclining position, thus turning the seat frame into a recliner and providing users with a more comfortable experience.

[0004] An adjustable seat frame includes a base frame, a seat cushion frame, and a back cushion frame. The seat cushion frame and the back cushion frame are hinged together. A gas spring is provided between the back cushion frame and the seat cushion frame. The gas spring includes a push rod, a top post, and an outer rod. The outer rod is hinged to the back cushion frame. The top post is mounted on the push rod. A rod sleeve is fixedly installed at the end of the push rod. The seat cushion frame is hinged to the rod sleeve. A push plate that can swing slightly on the rod sleeve is installed on the rod sleeve. One end of the push plate presses against the top post.

[0005] The aforementioned pneumatic rod is a common type comprising an inner rod and an outer rod. An upper and lower air chamber are located inside the inner rod, separated by a piston that can move up and down within the inner rod. The upper end of the inner rod has a pinhole leading to the upper air chamber. The lower air chamber has an outer air chamber that extends through the inner rod, passes through the outer rod, and connects to the pinhole, creating a structure where gas in the lower air chamber can flow through the outer air chamber to the pinhole and finally to the upper air chamber. A recessed air needle is movably mounted in the pinhole, with a top plate at its lower end to block the pinhole and a top post at its upper end. A piston rod passes through the inner and outer rods below the piston. The inner rod mentioned above refers to the push rod of this application, and the end of the piston rod is fixedly connected to the outer rod. The gas filled into the pneumatic rod is an inert gas.

[0006] Normally, the air needle separates the needle hole from the upper air chamber. At this time, the gas in the upper air chamber cannot escape, and the push rod is "push" by the gas, so it remains fixed inside the second telescopic rod. When the top post is pressed, the upper air chamber connects with the other air chambers, meaning the push rod can be pushed, and the piston remains stationary. At this point, the push rod can be pressed down by an external force, causing the volume of the upper air chamber to decrease and the volume of the lower air chamber to increase. When the top post is no longer pressed, the gas in the upper air chamber is compressed to the top plate of the active upper push needle, closing the needle hole passage. The gas in the upper air chamber no longer passes through the needle hole and the outer air chamber to reach the lower air chamber, making the upper air chamber a sealed space. The gas inside the upper air chamber is in a highly compressed state, giving the push rod a reverse thrust, thereby fixing the push rod back into a fixed state. The hinge point between the rod sleeve and the seat frame is also the fulcrum when the push plate swings. The end of the push plate that presses against the top post is located above this fulcrum, and the end of the wire fastened to the push plate is located below this fulcrum. When the user presses the top post directly or through other means, the push rod on the gas spring is activated. The user then applies pressure from their back against the backrest, compressing the gas spring and causing it to shorten. This allows the backrest to swing further down while the seat frame is stationary, until the user stops pressing the top post, at which point the push rod returns to its fixed position. To reset the backrest, the user simply needs to stop applying pressure to the backrest. The compressed gas in the upper air chamber pushes the push rod back, and then pressing the top post reconnects the upper and lower air chambers, restoring gas balance.

[0007] Preferably, a pull rod is movably mounted on the base frame. The pull rod is wound with wire, and the other end of the wire is fastened to the push plate. The pull rod can swing at the base frame, and a return spring is installed between the pull rod and the base frame to allow the pull rod to return to its original position. The outer side of the wire is wrapped with a soft and wear-resistant wire sleeve. The seat cushion frame has a lifting hole for the wire to pass through, preventing the wire from getting tangled in other parts and affecting the deformation of the seat frame when pulled. The pull rod is located at the front end of the gas spring; that is, the wire extends forward from the pull rod, passes through the lifting hole of the seat cushion frame, and reaches the lower end of the push plate. An armrest frame is mounted on the side of the base frame, and the pull rod is mounted on one of the armrest frames, allowing the user to easily reach the pull rod while seated, thereby easily adjusting the downward swing of the backrest frame.

[0008] Preferably, the top post is located at the upper end of the hinge point between the seat cushion frame and the rod sleeve, and the wire clip on the push plate is located at the lower end of the hinge point between the seat cushion frame and the rod sleeve. The hinge point between the rod sleeve and the seat cushion frame is also the fulcrum when the push plate swings. One end of the push plate that presses against the top post is located above this fulcrum, and the other end of the wire clip on the push plate is located below this fulcrum. With the help of the push plate of the tilting mechanism, in this seat frame, the user pulls the lever to pull the wire forward, causing the push plate to press against the top post, thereby allowing the push rod on the gas spring to be in a movable state.

[0009] Compared with the prior art, this utility model, through the structure composed of a pull rod, wire, push plate and gas spring, allows the user to easily lower the backrest to the desired swing direction by pulling the pull rod after sitting on the seat, thereby obtaining a more comfortable user experience. Attached Figure Description

[0010] Figure 1 This is a perspective view of an adjustable backrest seat frame according to the present invention.

[0011] Figure 2 This is a perspective view of the gas spring 62 of an adjustable backrest seat frame according to this utility model.

[0012] Figure 3 yes Figure 1 A magnified view of point A.

[0013] Attached reference numerals: base frame 1, pull rod 19, wire 191, seat cushion frame 2, push frame 3, pneumatic rod 62, push rod 621, top column 622, outer rod 623, rod sleeve 64, push plate 641, back cushion frame 7. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings.

[0015] The rear orientation standard in this article is based on Figure 1 The direction from the seat cushion 2 to the back cushion 7 is the rear.

[0016] Reference Figure 1-3 This utility model discloses an adjustable backrest frame for a seat. When a user sits on the seat and adjusts the orientation of the seat cushion frame 2 and other components, and then needs to adjust the orientation of the backrest frame 7 separately, the user first applies force to the backrest, using their own back to press against it in a natural posture, applying force based on their own weight. Then, the user pushes the lever 19 forward, which pulls the wire 191 backward, causing the lower end of the push plate 641 to push forward. This presses the top column 622 into the push rod 621, thus pushing the push rod 62... 1. It can move within the pneumatic rod 62, that is, the back pad frame 7 can be pushed; the push of the back pad frame 7 causes the pneumatic rod 62 to exhibit a contracting motion state, that is, the back pad frame 7 swings down. When the user feels that the back pad frame 7 has swung down to the required position, the push rod 19 is stopped, so that the top column 622 is no longer pressed by the push plate 641. Under the influence of the gas in the push rod 621, the top column 622 "springs back" and finally makes the push rod 621 return to the locked state where it can no longer move within the pneumatic rod 62. The back pad frame 7 stops swinging and completes the deformation of the back pad frame 7.

[0017] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present utility model, and these all fall within the protection scope of the present utility model.

Claims

1. A seat frame with an adjustable backrest, comprising a base frame (1), a seat cushion frame (2), and a backrest frame (7), characterized in that, The seat frame (2) is hinged to the backrest frame (7). A pneumatic rod (62) is provided between the backrest frame (7) and the seat frame (2). The pneumatic rod (62) includes a push rod (621), a top column (622), and an outer rod (623). The outer rod (623) is hinged to the backrest frame (7). The top column (622) is located on the push rod (621). A rod sleeve (64) is fixedly installed at the end of the push rod (621). The seat frame (2) is hinged to the rod sleeve (64). A push plate (641) that can swing slightly on the rod sleeve (64) is installed on the rod sleeve (64). One end of the push plate (641) is pressed against the top column (622).

2. The adjustable backrest seat frame according to claim 1, characterized in that, The base frame (1) is movably mounted with a pull rod (19), the pull rod (19) is wound with an iron wire (191), and the other end of the iron wire (191) is fastened to the push plate (641).

3. The adjustable backrest seat frame according to claim 2, characterized in that, The top post (622) is located at the upper end of the hinge point between the seat frame (2) and the rod sleeve (64), and the wire (191) is fastened to the push plate (641) at the lower end of the hinge point between the seat frame (2) and the rod sleeve (64).

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