Seat capable of adjusting backrest through toothed plate

Abstract

The seat with the backrest adjusted through the toothed plate comprises a seat wrapping sleeve and further comprises an adjusting mechanism, the adjusting mechanism is arranged at the end of the seat wrapping sleeve, and the adjusting mechanism comprises a backrest wrapping sleeve, a backrest lower framework, a backrest upper framework, a main toothed plate, a transverse rod, a rotating shaft A, a control rod, a limiting toothed plate, a rotating shaft B, a transverse shaft, a pressing plate and an operating rod. A backrest bag cover is arranged at the end of the seat bag cover in the vertical direction, an operating rod is pressed downwards, a transverse shaft is driven to rotate, a pressing plate deviates, the pressing plate can press the bottom end of a control rod, the control rod deflects by a certain angle around a rotating shaft A, meanwhile, a limiting toothed plate is driven to be separated from a main toothed plate, and at the moment, the height of a backrest upper framework can be adjusted; and after a proper height is reached, the operating rod is loosened, the limiting toothed plate is automatically reset and clamped, the height can be fixed, the toothed plate adjusting assembly is adopted, the use height of the backrest can be conveniently adjusted, and different use requirements are met.

Description

Technical Field

[0001] This utility model relates to the field of seat technology, and in particular to a seat with an adjustable backrest via a toothed plate. Background Technology

[0002] A chair is a support device that provides users with a place to sit or lie down. An adjustable chair is a chair that can be adjusted in terms of angle, height, and seat depth. With continuous development, it can be adjusted to multiple angles according to the user's needs, meeting the different physical needs of the user. It is a common and indispensable device in life and is widely used.

[0003] Existing adjustable seats have the following drawbacks in use: Common adjustment methods for adjustable seats include tilt adjustment, height adjustment, and seat depth adjustment. In actual use, many seats are equipped with headrest components. Although the headrest height is adjustable, the adjustment range is limited. Since the height of the seat back is fixed, the small range of headrest adjustment cannot meet the needs of everyone. Therefore, we propose a seat with a backrest that can be adjusted by a toothed plate. Utility Model Content

[0004] The main purpose of this utility model is to provide a seat with an adjustable backrest via a toothed plate. By using an adjustment mechanism at the end of the seat cover, the vertical height of the backrest can be adjusted to meet different usage needs and effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A seat with an adjustable backrest via a toothed plate includes a seat cover and an adjustment mechanism. The adjustment mechanism is located at the end of the seat cover and includes a backrest cover, a lower backrest frame, an upper backrest frame, a main toothed plate, a crossbar, a pivot A, a control rod, a limiting toothed plate, a pivot B, a horizontal shaft, a pressure plate, and an operating rod. The backrest cover is vertically positioned at the end of the seat cover. The lower backrest frame is installed at the bottom of the backrest cover, and the upper backrest frame is movably connected to the top of the lower backrest frame. The main toothed plate is welded to the bottom of the upper backrest frame. A crossbar is horizontally positioned at the top of the lower backrest frame, and a control rod is movably connected to the middle of the outer periphery of the crossbar via a pivot A. A limiting toothed plate corresponding to the position of the main toothed plate is fixedly connected to the top of the control rod. A pivot B is installed at both ends of the bottom of the lower backrest frame, and a horizontal shaft is movably connected to the bottom of the lower backrest frame via pivot B. A pressure plate corresponding to the bottom position of the control rod is welded to the middle of the outer periphery of the horizontal shaft. One end of the horizontal shaft extends to the outside of the seat cover and is equipped with an operating rod located outside the seat cover.

[0007] Furthermore, it also includes a connecting mechanism. A connecting mechanism is provided between the lower backrest frame and the upper backrest frame. The connecting mechanism includes a slot, a plug, a spring, and a rod. Slots are provided at both ends of the lower backrest frame. Rods inserted into the slots are fixedly connected to both ends of the bottom of the upper backrest frame, and plugs located inside the slots are welded to the ends of the plugs. Springs are installed between the bottom of the inner wall of the slot and the plug. A connecting structure of slots and rods is provided between the lower backrest frame and the upper backrest frame. A spring is provided inside the connecting position. When the limiting tooth plate loses its limiting effect on the main tooth plate, the spring force will slowly push the plug upward, and drive the upper backrest frame to move through the rod, thus extending the backrest length. When it is necessary to shorten, simply press down on the top of the backrest after separating the limiting tooth plate.

[0008] Furthermore, a corrugated sleeve is provided in the middle section of the backrest cover at the outer periphery of the connection between the lower backrest frame and the upper backrest frame; the corrugated sleeve at the connection does not affect the user experience, nor does it affect the displacement adjustment of the upper backrest frame.

[0009] Furthermore, a torsion spring A is installed at the connection between the crossbar and the control rod near the rotating shaft A; the torsion spring A structure can provide a force to the top of the control rod toward the main tooth plate, so that the limiting tooth plate fits against the main tooth plate and remains there.

[0010] Furthermore, a torsion spring B is installed between one end of the horizontal axis and the end of the lower frame of the backrest; the torsion spring B structure can realize the automatic reset of the horizontal axis after the horizontal axis angle is adjusted, thereby fixing the height of the backrest.

[0011] Furthermore, the outer periphery of the insert is covered with a rubber sleeve, which is attached to the inner wall of the slot; the rubber sleeve structure increases the friction at the connection, thereby reducing the extension speed of the spring when it pushes against the back frame.

[0012] Compared with the prior art, this utility model has the following beneficial effects: The end of the seat cover is provided with a backrest cover, and the main body of the backrest cover is composed of a lower backrest frame and an upper backrest frame. Under normal conditions, the limiting tooth plate at the end of the control lever engages with the main tooth plate at the bottom of the upper backrest frame to fix the overall height of the backrest cover. When it is necessary to adjust the backrest height, the operating lever is pressed down, which drives the horizontal shaft to rotate and the pressure plate to shift. The pressure plate will press the bottom of the control lever, causing the control lever to deflect around the rotating shaft A at a certain angle. At the same time, the limiting tooth plate is driven to separate from the main tooth plate. At this time, the height of the upper backrest frame can be adjusted. The backrest height can be adjusted by releasing the control lever after reaching the desired height. The limiting tooth plate will automatically reset and engage to fix the height. The tooth plate adjustment assembly allows for convenient adjustment of the backrest height to meet different usage needs. A slot and rod connection structure is provided between the lower and upper backrest frames. A spring is installed inside the connection position. When the limiting tooth plate loses its limiting effect on the main tooth plate, the spring force will slowly push the plug upward, and drive the upper backrest frame to move through the plug rod, extending the backrest length. To shorten it, simply press down on the top of the backrest after separating the limiting tooth plate. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a seat with an adjustable backrest via a toothed plate, according to this utility model.

[0014] Figure 2 This is a schematic diagram of the connection between the lower and upper backrest frames of a seat with an adjustable backrest via a toothed plate, according to the present invention.

[0015] Figure 3 This is a side view schematic diagram of the control lever installation structure of a seat with an adjustable backrest via a toothed plate according to this utility model.

[0016] In the diagram: 1. Seat cover; 2. Adjustment mechanism; 201. Backrest cover; 202. Corrugated cover; 203. Lower backrest frame; 204. Upper backrest frame; 205. Main gear plate; 206. Crossbar; 207. Rotating shaft A; 208. Torsion spring A; 209. Control lever; 210. Limiting gear plate; 211. Rotating shaft B; 212. Horizontal shaft; 213. Torsion spring B; 214. Pressure plate; 215. Operating lever; 3. Connecting mechanism; 301. Slot; 302. Insert block; 303. Spring; 304. Rubber sleeve; 305. Insert rod. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] like Figure 1-3As shown, a seat with an adjustable backrest via a toothed plate includes a seat cover 1 and an adjustment mechanism 2. The adjustment mechanism 2 is provided at the end of the seat cover 1. The adjustment mechanism 2 includes a backrest cover 201, a lower backrest frame 203, an upper backrest frame 204, a main toothed plate 205, a crossbar 206, a rotating shaft A 207, a control lever 209, a limiting toothed plate 210, a rotating shaft B 211, a crossbar 212, a pressure plate 214, and an operating lever 215. The backrest cover 201 is vertically positioned at the end of the seat cover 1. The lower backrest frame 203 is installed at the bottom of the backrest cover 201, and the upper backrest frame 204 is movably connected to the top of the lower backrest frame 203. A main toothed plate 205 is welded to the bottom of the 204. A horizontal bar 206 is provided at the top of the backrest lower frame 203, and a control rod 209 is movably connected to the middle position of the outer periphery of the horizontal bar 206 via a pivot A207. A limiting toothed plate 210 corresponding to the position of the main toothed plate 205 is fixedly connected to the top of the control rod 209. A pivot B211 is installed at both ends of the bottom of the backrest lower frame 203, and a horizontal shaft 212 is movably connected to the pivot B211. A pressure plate 214 corresponding to the bottom position of the control rod 209 is welded to the middle position of the outer periphery of the horizontal shaft 212. One end of the horizontal shaft 212 extends to the outside of the seat cover 1 and is equipped with an operating rod 215 located outside the seat cover 1.

[0019] The system also includes a connecting mechanism 3. A connecting mechanism 3 is provided between the lower backrest frame 203 and the upper backrest frame 204. The connecting mechanism 3 includes a slot 301, a plug 302, a spring 303, and a plug rod 305. Slots 301 are provided at both ends of the lower backrest frame 203. Plug rods 305, inserted into the slots 301, are fixedly connected to both ends of the bottom of the upper backrest frame 204. The plug rods 305 are welded to the ends of the plug rods 305, which are located inside the slots 301. The bottom of the inner wall of the slot 301 is connected to… Springs 303 are installed between the insert blocks 302; a slot 301 and a rod 305 are provided between the lower frame 203 and the upper frame 204 of the backrest. A spring 303 is provided inside the connection position. When the limiting tooth plate 210 loses its limiting effect on the main tooth plate 205, the spring 303 will slowly push the insert block 302 upward under the elastic force, and drive the upper frame 204 of the backrest to move through the rod 305, thus extending the backrest length. When it is necessary to shorten it, simply press down on the top of the backrest after separating the limiting tooth plate 210.

[0020] The backrest cover 201 has a corrugated cover 202 located at the outer periphery of the connection between the lower backrest frame 203 and the upper backrest frame 204 in the middle section. The corrugated cover 202 is located at the connection point without affecting the user experience or the displacement adjustment of the upper backrest frame 204.

[0021] Among them, a torsion spring A208 is installed at the connection between the crossbar 206 and the control rod 209 near the rotating shaft A207, and a torsion spring B213 is installed between one end of the crossbar 212 and the end of the lower backrest frame 203. The torsion spring A208 structure can provide a force to the top of the control rod 209 towards the main tooth plate 205, so that the limiting tooth plate 210 fits against the main tooth plate 205 and remains there. The torsion spring B213 structure can realize the automatic reset of the crossbar 212 after the angle of the crossbar 212 is adjusted, thereby fixing the backrest height.

[0022] The insert 302 is covered with a rubber sleeve 304, which is attached to the inner wall of the slot 301. The rubber sleeve 304 increases the friction at the connection, which reduces the extension speed of the spring 303 when it pushes against the back frame 204.

[0023] It should be noted that this utility model is a seat with an adjustable backrest via a toothed plate. In use, the end of the seat cover 1 is provided with a backrest cover 201. The main body of the backrest cover 201 consists of a lower backrest frame 203 and an upper backrest frame 204. Under normal conditions, the limiting toothed plate 210 at the end of the control lever 209 engages with the main toothed plate 205 at the bottom of the upper backrest frame 204, fixing the overall height of the backrest cover 201. When the backrest height needs to be adjusted, the operating lever 215 is pressed down, causing the horizontal shaft 212 to rotate and the pressure plate 214 to shift. The pressure plate 214 presses down on the bottom of the control lever 209, causing the control lever 209 to deflect at a certain angle around the rotating shaft A207. Simultaneously, the limiting toothed plate 210 is driven to separate from the main toothed plate 205, at which point the backrest height can be adjusted. The height of the upper frame 204 is adjusted to adjust the overall height of the backrest. Once the appropriate height is reached, the operating lever 215 is released, and the limiting tooth plate 210 automatically resets and engages to fix the height. The tooth plate adjustment assembly allows for convenient adjustment of the backrest's height to meet different usage needs. A slot 301 and a plug 305 are provided between the lower frame 203 and the upper frame 204 of the backrest. A spring 303 is provided inside the connection position. When the limiting tooth plate 210 loses its limiting effect on the main tooth plate 205, the spring 303 will slowly push the plug 302 upward under the elastic force, and drive the upper frame 204 of the backrest to move through the plug 305, extending the backrest length. When it is necessary to shorten the backrest, simply press down on the top of the backrest after separating the limiting tooth plate 210.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A seat with backrest adjustment by toothed plate comprising a seat cover (1), characterized in that, Also include the adjusting mechanism (2), the seat cover (1) end is provided with adjusting mechanism (2), the adjusting mechanism (2) includes backrest cover (201), backrest lower framework (203), backrest upper framework (204), main tooth plate (205), crossbar (206), pivot A (207), control rod (209), limit tooth plate (210), pivot B (211), cross shaft (212), pressing plate (214) and operating lever (215), the seat cover (1) end vertical direction is provided with backrest cover (201), the backrest cover (201) inside bottom end is installed backrest lower framework (203) and backrest lower framework (203) top is movably connected with backrest upper framework (204), the backrest upper framework (204) bottom is welded with main tooth plate (205), the backrest lower framework (203) inside top horizontal direction is provided with crossbar (206) and crossbar (206) outer circumferential middle position is movably connected with control rod (209) through pivot A (207), the control rod (209) top is fixedly connected with the limit tooth plate (210) corresponding to the position of main tooth plate (205), the backrest lower framework (203) bottom both ends are installed pivot B (211) and are movably connected with cross shaft (212) through pivot B (211), the cross shaft (212) outer circumferential middle position is welded with pressing plate (214) corresponding to the position of control rod (209) bottom end, the cross shaft (212) one end extends to the outside of seat cover (1) and is installed operating lever (215) located in the outside of seat cover (1).

2. A seat with a backrest adjusted by a toothed plate according to claim 1, characterized in that: Also include the connecting mechanism (3), the backrest lower framework (203) and backrest upper framework (204) are provided with connecting mechanism (3), the connecting mechanism (3) includes slot (301), plug (302), spring (303) and plug rod (305), the backrest lower framework (203) inside both ends are provided with slot (301), the backrest upper framework (204) bottom both ends are fixedly connected with the plug rod (305) inserted into the inside of slot (301) and the end of plug rod (305) is welded with plug (302) located in the inside of slot (301), the spring (303) is installed between the inner wall bottom end of slot (301) and plug (302).

3. A seat with backrest adjusted by toothed plate according to claim 1, characterized in that: The backrest cover (201) middle position is provided with the corrugated cover (202) located in the outer circumferences of the connecting place between backrest lower framework (203) and backrest upper framework (204).

4. A seat with a backrest adjusted by a toothed plate according to claim 1, characterized in that: The connecting place between crossbar (206) and control rod (209) is installed torsional spring A (208) on the side close to pivot A (207).

5. A seat with backrest adjusted by toothed plate according to claim 1, characterized in that: The end of cross shaft (212) and the end of backrest lower framework (203) are installed torsional spring B (213).

6. A seat with backrest adjusted by toothed plate according to claim 2, characterized in that: The outer circumferences of plug (302) are covered with rubber sleeve (304), and the rubber sleeve (304) is attached to the inner wall of slot (301).

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