Seat with liftable backrest

Abstract

The utility model relates to a seat with a liftable backrest, which comprises a seat plate, a backrest, a backrest and a backrest, a fixed back plate is arranged on the back side of the seat plate, a sliding back plate is arranged on the inner side of the fixed back plate, and the sliding back plate is in sliding connection with the fixed back plate through a sliding assembly; the adjusting assembly is arranged on the inner side of the fixed back plate and used for adjusting the height of the sliding back plate; the extending assembly is arranged on the bottom side of the seat plate and used for controlling the adjusting assembly. The utility model relates to the technical field of seats with adjustable backrests. According to the seat with the liftable backrest, the adjusting screw rod is rotated, so that the adjusting screw rod rotates in the rotating groove, in the rotating process, the thread of the adjusting screw rod pushes the fixed back plate to move upwards under the cooperation of the adjusting groove, so that the height of the fixed back plate is adjusted, and the screw rod cannot be pushed by the thread to rotate, so that the height of the fixed back plate is adjusted. And the stability of fixing the back plate can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the technical field of adjustable backrest seats, and in particular to a seat with a height adjustable backrest. Background Technology

[0002] Common study chairs usually consist of a seat cushion and a backrest. However, the seat cushion and backrest are usually fixed. Due to different growth cycles, the height of different students varies greatly.

[0003] Most existing study chairs have backrests connected by bolts, making it difficult for students to adjust the chair to their own needs. Furthermore, students cannot easily adjust the backrest while sitting, which can easily lead to incomplete adjustments and requires repeated adjustments, resulting in low adjustment efficiency. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a seat with an adjustable backrest, so as to solve the technical problems mentioned in the background art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A seat with an adjustable backrest, comprising:

[0007] The seat has legs at all four corners at its bottom.

[0008] A fixed back plate is provided on the back side of the seat plate, and a sliding back plate is provided on the inner side of the fixed back plate. The sliding back plate is slidably connected to the fixed back plate through a sliding component.

[0009] An adjustment component, located inside the fixed backplate, is used to adjust the height of the sliding backplate.

[0010] An extension assembly, located on the underside of the seat plate, is used to control the adjustment assembly.

[0011] Furthermore, the sliding component includes:

[0012] Two guide rails are fixedly installed on both sides of the inside of the fixed back plate;

[0013] Multiple sliders are provided, and the sliders are slidably disposed inside the guide rail. One end of the slider protruding from the guide rail is fixedly connected to the sliding back plate.

[0014] Furthermore, the adjustment component includes:

[0015] A rotating groove is formed in the middle of the inner side of the fixed back plate;

[0016] The adjustment groove is located on the outer arc surface of the sliding back plate and corresponds to the position of the rotation groove;

[0017] The adjusting screw rotates inside the rotating groove and is threaded into the adjusting groove.

[0018] Furthermore, the extension component includes:

[0019] The bevel gear set includes two bevel gears, one of which is fixedly connected to the bottom end of the adjusting screw, and the other bevel gear is rotatably connected to the bottom end of the base plate through a mounting bracket. An extension rod is fixedly installed at the center of the shaft. The two bevel gears mesh with each other, and a rotating component is installed inside the extension rod.

[0020] Furthermore, the extension rod passes through the seat plate and extends to the side of the seat plate.

[0021] Furthermore, the rotating assembly includes:

[0022] A hexagonal hole is provided at the end of the extension rod away from the bevel gear set;

[0023] The hexagonal rod is slidably disposed inside the hexagonal hole. A handle groove is provided inside the hexagonal rod, and a rotating handle is connected to the handle groove through a shaft.

[0024] In summary, this utility model has at least one of the following beneficial technical effects:

[0025] 1. A seat with a height adjustable backrest, wherein rotating the adjusting screw causes the adjusting screw to rotate inside the rotating groove, and during the rotation, the thread of the adjusting screw pushes the fixed back plate upward with the cooperation of the adjusting groove, so as to adjust the height of the fixed back plate. Furthermore, since the thread cannot push the screw to rotate, the stability of the fixed back plate can be effectively improved.

[0026] 2. This type of seat with adjustable backrest uses a hexagonal hole for sliding installation of a hexagonal rod. When the extension rod needs to be twisted, the hexagonal plate is pulled out from the hexagonal hole, and the handle is rotated so that the handle and the hexagonal rod form an angle. At this time, the handle can form a lever, so that the user can rotate the hexagonal rod and the extension rod, thereby achieving the purpose of easy adjustment. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1This is a structural schematic diagram of a seat with an adjustable backrest according to the present invention.

[0029] Figure 2 This is a structural cross-sectional view of a seat with an adjustable backrest according to the present invention.

[0030] Figure 3 This is a schematic diagram of the sliding and adjusting components of a seat with a height-adjustable backrest according to the present invention.

[0031] Figure 4 This is a schematic diagram of the structure of an extension component of a seat with a height-adjustable backrest according to the present invention.

[0032] In the diagram, 1 is the seat plate; 2 is the support leg; 3 is the fixed back plate; 4 is the sliding back plate; 5 is the sliding assembly; 51 is the guide rail; 52 is the slider; 6 is the adjustment assembly; 61 is the rotating groove; 62 is the adjusting groove; 63 is the adjusting screw; 7 is the extension assembly; 71 is the bevel gear set; 72 is the extension rod; 73 is the hexagonal hole; 74 is the hexagonal rod; 75 is the handle groove; and 76 is the rotating handle. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings.

[0034] Example:

[0035] Reference Figures 1-4 The present invention discloses a seat with an adjustable backrest, comprising:

[0036] The seat plate 1 has legs 2 at its four corners at the bottom.

[0037] A fixed back plate 3 is provided on the back side of the seat plate 1, and a sliding back plate 4 is provided on the inner side of the fixed back plate 3. The sliding back plate 4 is slidably connected to the fixed back plate 3 through a sliding component 5.

[0038] Adjustment component 6, which is located inside the fixed back plate 3, is used to adjust the height of the sliding back plate 4;

[0039] The extension component 7, which is located on the bottom side of the base plate 1, is used to control the adjustment component 6.

[0040] In this embodiment, as Figure 3 As shown, the fixed back panel 3 and the sliding back panel 4 are slidably connected. By rotating the adjustment component 6, the fixed back panel 3 can be moved up and down. Furthermore, by setting the extension component 7, the control end of the adjustment component 6 is extended to the side wall of the seat panel 1. Therefore, the user can adjust the adjustment component 6 through the extension component 7 in a normal sitting position, so that the user can quickly adjust to the most comfortable position, which can effectively improve the convenience of backrest adjustment.

[0041] In a further preferred embodiment of this utility model, such as Figure 3 As shown, the sliding component 5 includes:

[0042] Two guide rails 51 are respectively fixedly installed on both sides of the inside of the fixed back plate 3;

[0043] Multiple sliders 52 are provided and are slidably disposed inside the guide rail 51. One end of the slider 52 protruding from the guide rail 51 is fixedly connected to the sliding back plate 4.

[0044] In this embodiment, the slider 52 and the slide rail are used to slide the sliding back plate 4 and the fixed back plate 3 in a sliding connection.

[0045] In a further preferred embodiment of this utility model, such as Figure 3 As shown, the adjustment component 6 includes:

[0046] The rotating groove 61 is located in the middle of the inner side of the fixed back plate 3;

[0047] The adjustment groove 62 is formed on the outer arc surface of the sliding back plate 4 and corresponds to the position of the rotation groove 61;

[0048] The adjusting screw 63 is rotatably disposed inside the rotating groove 61 and is threadedly engaged with the adjusting groove 62.

[0049] In this embodiment, when adjusting the sliding back plate 4, the adjusting screw 63 is rotated so that the adjusting screw 63 rotates inside the rotating groove 61. During the rotation, the thread of the adjusting screw 63 pushes the fixed back plate 3 upward with the cooperation of the adjusting groove 62, so as to adjust the height of the fixed back plate 3.

[0050] In a further preferred embodiment of this utility model, such as Figure 4 As shown, the extension component 7 includes:

[0051] The bevel gear set 71 includes two bevel gears. One bevel gear is fixedly connected to the bottom end of the adjusting screw 63, and the other bevel gear is rotatably connected to the bottom end of the base plate 1 through the mounting bracket. An extension rod 72 is fixedly provided at the center of the shaft. The two bevel gears mesh with each other, and a rotating component is provided inside the extension rod 72.

[0052] In this embodiment, while changing the transmission direction through the bevel gear set 71 formed by two bevel gears, the extension rod 72 is connected to the adjusting screw 63. By rotating the extension rod 72, the adjusting screw 63 is driven to rotate. By setting the rotating component, the torque required to rotate the extension rod 72 is reduced.

[0053] In a further preferred embodiment of this utility model, such as Figure 1As shown, the extension rod 72 passes through the seat plate 1 and extends to the side of the seat plate 1.

[0054] In this embodiment, since the extension rod 72 passes through the seat plate 1 and is located on the side of the seat plate 1, the user can rotate the extension rod 72 in a normal sitting position. At this time, the user's back can always be in contact with the sliding back panel 4, which can effectively improve the accuracy of the height adjustment of the sliding back panel 4.

[0055] In a further preferred embodiment of this utility model, such as Figure 4 As shown, the rotating assembly includes:

[0056] A hexagonal hole 73 is provided at the end of the extension rod 72 away from the bevel gear set 71;

[0057] A hexagonal rod 74 is slidably disposed inside a hexagonal hole 73. A handle groove 75 is provided inside the hexagonal rod 74, and a rotating handle 76 is connected inside the handle groove 75 via a shaft.

[0058] In this embodiment, the hexagonal rod 74 is slidably mounted through the hexagonal hole 73. When the extension rod 72 needs to be twisted, the hexagonal plate is pulled out from the hexagonal hole 73 and the rotating handle 76 is rotated so that the rotating handle 76 and the hexagonal rod 74 form an angle. At this time, the rotating handle 76 can form a lever so that the user can rotate the hexagonal rod 74 and the extension rod 72, thereby achieving the purpose of easy adjustment.

[0059] The implementation principle of the above embodiment is as follows: the rotating adjustment component 6 enables the fixed back panel 3 to move up and down, and through the setting of the extension component 7, the control end of the adjustment component 6 is extended to the side wall of the seat plate 1. Therefore, the user can adjust the adjustment component 6 through the extension component 7 in a normal sitting position, so that the user can quickly adjust to the most comfortable position, which can effectively improve the convenience of backrest adjustment.

[0060] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A seat with a backrest that is adjustable in height, characterized in that, The utility model relates to a height-adjustable seat, which comprises the following parts: a seat plate (1) provided with four supporting legs (2) at the bottom corners; a fixed back plate (3) provided at the back side of the seat plate (1), an inner side of the fixed back plate (3) provided with a sliding back plate (4), the sliding back plate (4) being slidably connected to the fixed back plate (3) through a sliding assembly (5); an adjusting assembly (6) provided at the inner side of the fixed back plate (3) for adjusting the height of the sliding back plate (4); an extension assembly (7) provided at the bottom side of the seat plate (1) for controlling the adjusting assembly (6).

2. A seat with a backrest that is adjustable in height according to claim 1, characterized in that The sliding assembly (5) comprises: two guide rails (51) fixedly provided at the two inner sides of the fixed back plate (3); a plurality of sliding blocks (52) slidably provided in the guide rails (51), one end of the sliding blocks (52) protruding from the guide rails (51) being fixedly connected to the sliding back plate (4).

3. A seat with a backrest that is adjustable in height according to claim 2, characterized in that The adjusting assembly (6) comprises: a rotating groove (61) formed in the middle of the inner side of the fixed back plate (3); an adjusting groove (62) formed in the outer arc surface of the sliding back plate (4) and corresponding to the position of the rotating groove (61); an adjusting screw (63) rotatably provided in the rotating groove (61) and threadedly matched with the adjusting groove (62).

4. A seat with a backrest that is adjustable in height according to claim 3, characterized in that The extension assembly (7) comprises: a bevel gear set (71) comprising two bevel gears, one of the bevel gears being fixedly connected to the bottom end of the adjusting screw (63), the other bevel gear being rotatably connected to the bottom end of the seat plate (1) through a mounting frame, an extension rod (72) being fixedly provided at the shaft center of the other bevel gear, the two bevel gears being meshed with each other, and the extension rod (72) being provided with a rotating assembly in the inside.

5. A seat with a backrest that is adjustable in height according to claim 4, characterized in that The extension rod (72) penetrates through the seat plate (1) and extends to the side of the seat plate (1).

6. A seat with a backrest that is adjustable in height according to claim 5, characterized in that The rotating assembly comprises: a hexagonal hole (73) formed at one end of the extension rod (72) away from the bevel gear set (71); a hexagonal rod (74) slidably provided in the hexagonal hole (73), the hexagonal rod (74) being provided with a handle groove (75) in the inside, and a rotating handle (76) being connected to the handle groove (75) through a shaft rod.

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