Backrest form capturing and size measuring mechanism and office chair

Abstract

The invention discloses a backrest form capturing and size measuring mechanism and an office chair, and relates to the technical field of office chairs, the backrest form capturing and size measuring mechanism comprises a backrest unit, two groups of slide rails, a fixing frame, a capturing assembly, an adjusting assembly, a support frame and a measuring assembly. According to the device, under different sitting postures and crowds, the needed office chair backrest form is simulated through displacement movement of the vacuum rods, the vacuum rods are controlled to move front and back through the air cylinders, the vacuum rods are made to be better attached to the backs of the different crowds under the different sitting postures, and therefore the sizes of key parts of the backrest are obtained. A more comfortable backrest form can be obtained, and meanwhile, the size reference of key parts can be provided for the improvement of the backrest form of the corresponding office chair. Meanwhile, a displacement sensor is arranged, and the moving distance of the vacuum rod can be directly obtained and controlled. The form and the related size of the backrest are obtained by using a more intelligent and convenient method, and guidance is provided for the design of the backrest of the office chair.

Description

Technical Field

[0001] The present invention relates to the field of office chairs, in particular to a backrest shape capturing and dimension measuring mechanism and an office chair. Background Art

[0002] In the field of office chair design, accurate characterization and measurement of the human back are crucial for improving the user experience. An ergonomic office chair not only provides a comfortable sitting experience but also effectively prevents health issues such as back pain and muscle tension caused by prolonged poor sitting posture. Therefore, accurately capturing the natural shape of the human back in various sitting positions for people of different body types is fundamental to ensuring the rationality of office chair backrest design.

[0003] However, most office chair designs currently on the market rely on past experience and imitation of existing products, lacking in-depth ergonomic research. Specifically, when it comes to capturing the morphology of the human back, there are challenges: office chair designs are often based on traditional experience and successful market cases, rather than on scientific research and data analysis of actual user experience. This leads to limitations in product comfort and health support. Existing methods for capturing the morphology of the human back (such as the technology described in patent 201810763362.4) can capture back morphology to a certain extent. However, due to their complex adjustment mechanisms and limitations of their overall structure, they can only capture the morphology of the back in an upright sitting position and fail to fully capture the natural morphology of the human back in various sitting positions. While CMD devices can provide some data, they are not widely used in office chair design. Different body shapes and personal habits lead to different demands for office chair comfort, but current technologies and design processes often fail to fully account for these individual differences, resulting in products that are difficult to meet the needs of all users. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that the existing back morphology extraction method cannot fully cover the natural morphology of the human back in various sitting postures.

[0005] The above technical problem is solved by the following technical solution: The present invention provides a backrest shape capture size measurement mechanism, wherein the backrest unit includes two sets of slide rails, a fixed frame arranged inside the slide rails, a capture assembly arranged inside the fixed frame, an adjustment assembly arranged on the top of the capture assembly, a support frame arranged at the rear end of the adjustment assembly, and a measurement assembly arranged on the support frame;

[0006] The capture component is used to display the angle, depth or shape of the back;

[0007] The measuring component is used to measure the displacement of the capturing component.

[0008] In a preferred embodiment of the backrest shape capturing and measuring mechanism of the present invention: the fixing frame includes a limit plate, two sets of pressing plates slidably connected to the slide rails, and a plurality of clamping rods linearly arranged on the inner sides of the pressing plates;

[0009] The capture assembly includes a plurality of vacuum rods arrayed in the clamping rod slots, a sliding rod arranged at the axis of the vacuum rod, and a cylinder arranged at the end of the sliding rod.

[0010] In a preferred embodiment of the backrest form capturing and dimension measuring mechanism of the present invention: the cylinder controls each of the vacuum rods to move forward and backward within a certain range;

[0011] The clamping rod includes a plurality of limiting grooves arranged on the inner side thereof;

[0012] The plurality of vacuum rods are slidably limited in the limiting grooves and can simulate backrests of different shapes.

[0013] In a preferred embodiment of the backrest shape capturing dimension measuring mechanism of the present invention, the adjustment assembly includes a handwheel, a screw rod arranged on the inner side of the handwheel, a straight rod arranged on one side of the screw rod, a headrest arranged on one side of the screw rod, and a pull plate fixedly connected to the end of the clamping rod.

[0014] In a preferred embodiment of the backrest shape capture dimension measurement mechanism of the present invention: the measuring component includes a displacement sensor fixedly arranged on the cylinder, a fixing bracket arranged at the rear end of the limit plate, a back transparent plate arranged on the inner side of the fixing bracket, a laser displacement sensor arranged on the end face of the back transparent plate, and a displacement digital display arranged on the support bracket.

[0015] In a preferred embodiment of the backrest form capturing and dimension measuring mechanism of the present invention: the displacement sensor is used to measure the moving distance of each vacuum rod;

[0016] The laser displacement sensor measures the position change of each sliding rod surface based on the laser triangulation reflection principle.

[0017] In a preferred embodiment of the backrest form capturing and dimension measuring mechanism of the present invention: the number of longitudinal movement points of the displacement sensor corresponds to the longitudinal number of the slide bars;

[0018] The displacement sensor simulates a line in the transverse direction by displacing a control point, and then simulates the shape of the entire backrest by using the line in the transverse direction.

[0019] The present invention further provides an office chair, comprising the backrest shape capturing and measuring mechanism, and further comprising:

[0020] The seat unit includes a backrest adjustment component, a movable seat surface arranged on one side of the backrest adjustment component, baffles arranged on both sides of the movable seat surface, a slide plate arranged on the inner side of the baffle, and a pulley arranged at the bottom of the baffle.

[0021] In a preferred embodiment of the office chair of the present invention: the backrest adjustment assembly includes a first hinged seat, a hydraulic rod hinged to one side of the first hinged seat, a second hinged seat arranged at the bottom of the hydraulic rod, and a fixed seat fixed to the bottom of the second hinged seat;

[0022] The fixing seat is fixedly connected to the baffle.

[0023] In a preferred embodiment of the office chair of the present invention: the movable seat surface is slidably arranged on the base plate on the slide, the guide cylinder is arranged on the inner side of the base plate, the support rod is arranged on the inner side of the guide cylinder, and the chair seat is arranged on the end surface of the support rod.

[0024] The beneficial effects of the present invention are as follows: under different sitting postures and groups of people, the required office chair back shape is simulated by the displacement movement of each vacuum rod, and the vacuum rod is controlled by the cylinder to move back and forth, so that it fits the backs of different people in different sitting postures more closely, thereby obtaining the dimensions of key parts of the backrest. Not only can a more comfortable backrest shape be obtained, but it can also provide a dimensional reference for key parts of the improvement of the corresponding office chair back shape. At the same time, a displacement sensor is configured to directly obtain the distance for controlling the movement of the vacuum rod. The shape and related dimensions of the backrest are obtained in a more intelligent and convenient way, providing guidance for the design of the office chair backrest. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Among them:

[0026] Figure 1 It shows the overall structural diagram of the backrest shape capturing and measuring mechanism of the present invention;

[0027] Figure 2 A schematic diagram of the partial structure of the capture component of the present invention is shown;

[0028] Figure 3 Shows a schematic structural diagram of the regulating assembly of the present invention;

[0029] Figure 4 A schematic diagram of the partial structure of the back side of the capture assembly of the present invention is shown;

[0030] Figure 5 Shows a schematic diagram of the overall structure of the office chair of the present invention;

[0031] Figure 6 A schematic diagram of the overall structure of the office chair of the present invention is shown from another perspective. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to specific embodiments and the accompanying drawings.

[0033] The terms used in the present invention are those commonly used in the art in view of the functions of the present invention, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as the meanings of the terms and the overall description of the present invention.

[0034] Reference Figures 1 to 6 , this embodiment provides a backrest shape capture dimension measurement mechanism, including a backrest unit 1, including two sets of slide rails 11, a fixing frame 12 arranged inside the slide rails 11, a capture component 13 arranged inside the fixing frame 12, an adjustment component 14 arranged on the top of the capture component 13, a support frame 15 arranged at the rear end of the adjustment component 14, and a measuring component 16 arranged on the support frame 15;

[0035] The capture component 13 is used to display the angle, depth or shape of the back;

[0036] The measuring component 16 is used to measure the displacement of the capturing component 13 .

[0037] In this embodiment, two sets of slide rails 11 are arranged in mirror-image configuration, with a fixed frame 12 slidingly mounted on the end surface of each set of slide rails 11. A capture assembly 13 is fixedly mounted on each of the two symmetrically arranged fixed frames 12. This capture assembly 13 can replicate the shape of the human back, allowing a measuring assembly 16 at the rear end of the capture assembly 13 to accurately measure each stroke of the capture assembly 13. Furthermore, an adjustment assembly 14 is fixedly mounted on the upper end of the capture assembly 13. This adjustment assembly 14, via a screw, drives the capture assembly 13 up and down on the slide rails 11, allowing it to accommodate the back position requirements of different people.

[0038] A set of support frames 15 are fixedly connected to the back of the slide rail 11 , and the support frames 15 provide movement space for the capture component 13 and the measurement component 16 arranged in the inner space thereof.

[0039] Specifically, the capture assembly 13 is used to display the angle, depth, or shape of the back's immersion. When a person's back rests against the end face of the capture assembly 13, the compressive force from the back first acts on the capture assembly 13, forcing it to retreat. Secondly, the capture assembly 13 also generates a forward force, forcing it forward. The interaction of these two forces allows for a more accurate rubbing of the back's shape.

[0040] Reference Figure 2 and Figure 4 In some embodiments, the fixing frame 12 includes a limiting plate 121, two sets of pressing plates 122 slidably connected to the slide rail 11, and a plurality of clamping rods 123 arranged in a linear array inside the pressing plates 122;

[0041] The capture assembly 13 includes a plurality of vacuum rods 131 arrayed in the slots of the clamping rod 123 , a sliding rod 132 disposed at the axis of the vacuum rod 131 , and a cylinder 133 disposed at the end of the sliding rod 132 .

[0042] The vacuum rod 131 is 150 mm long, and the cylinder 133 controls each vacuum rod 131 to move forward and backward within a range of 0-100 mm;

[0043] The clamping rod 123 includes a plurality of limiting grooves 1231 provided on the inner side thereof;

[0044] The plurality of vacuum rods 131 are slidably limited in the limiting grooves 1231 and can simulate backrests of different shapes.

[0045] In this embodiment, the fixed frame 12 is composed of two sets of pressure plates 122 that are slidably mounted on the slide rails 11, a plurality of clamping rods 123 arranged in a linear array inside the pressure plates 122, and a limiting plate 121 at the rear end of the pressure plates 122. The clamping rods 123 are provided with a plurality of limiting grooves 1231 arranged in a linear array. In addition, the limiting plate 121, which is arranged parallel to the rear end of the pressure plates 122, has a corresponding through-hole, which facilitates the installation of the vacuum rod 131 within the limiting grooves 1231 and the through-hole of the limiting plate 121.

[0046] Secondly, a set of sliding rods 132 are connected to the rear end axis of each set of vacuum rods 131, and the other end of the sliding rods 132 is connected to the cylinder 133. The cylinder 133 can push the sliding rods 132 deep into the inside of the vacuum rods 131 to compress the vacuum rods 131.

[0047] Specifically, the cylinder 133 can drive the slide rod 132 to perform linear reciprocating motion through compressed air. The stroke of the cylinder 133 must be greater than the moving distance required by the vacuum rod 131 to ensure that the vacuum rod 131 can smoothly reach the desired position.

[0048] The vacuum rod 131 is composed of 209 vacuum rods, and the length of the rod is 150mm. Under the action of the cylinder 133, each rod can move back and forth within a range of 0-100mm. After multiple vacuum rods 131 are moved according to the designed parameters, different forms of backrests can be simulated. The actual length of the rod is based on the curvature of the human lumbar spine. It is known that the depth of the protruding point of the lumbar support of the office chair backrest is no more than 150mm. In order to fit the waist of different people, the length of the vacuum rod 131 is set to 150mm. The front end of the rod is covered with a cap end, which is replaceable and is intended to simulate the softness and hardness of the mesh backrest.

[0049] Preferably, the height difference of the back shape of the human body is no more than 100 mm, so the selected vacuum rod length is 150 mm and the cylinder stroke is 100 mm, which allows each vacuum rod 131 to move back and forth within a range of 0-100 mm, providing sufficient movement range for simulating backrests of different shapes.

[0050] Preferably, vacuum rod 131 slides within retaining groove 1231 and can simulate various backrest configurations. Pressing the backrest downward first retracts vacuum rod 131. Cylinder 133 then lifts slide rod 132, allowing slide rod 132 to act on vacuum rod 131, allowing vacuum rod 131 to conform more closely to the human back. The device's cylinder 133 is connected to a gas hose, and a cylinder interface and pressure gauge are mounted on its side. The cylinder interface, serving as a channel for gas to enter the cylinder, offers excellent sealing performance, effectively preventing gas leakage. The pressure gauge displays the cylinder's air pressure in real time, allowing the operator to monitor the cylinder's operating status at all times. When the switch is turned on, gas enters cylinder 133 from gas hose 1. The gas hose exhibits excellent flexibility and pressure resistance, ensuring smooth gas delivery while adapting to the device's various motion configurations. After gas enters cylinder 133, slide rod 132 retracts, returning vacuum rod 131 to its initial state. When the air pressure drops, the subject's back presses against the vacuum rod 131, and the loaded slide bar 132 moves backward until the thrust of the cylinder 133 and the subject's pressure reach equilibrium. This design allows the vacuum rod 131 to move in response to changes in external pressure, simulating different backrest configurations.

[0051] In summary, this embodiment achieves accurate capture and size measurement of the backrest shape through the coordinated use of the fixed frame 12 and the vacuum rod 131. In the process of pressing the backrest down, the clamping rod 123 on the pressure plate 122 can flexibly adapt to the shape changes of the backrest through the sliding cooperation with the vacuum rod 131 in the limiting groove 1231. At the same time, the driving action of the cylinder 133 enables the vacuum rod 131 to move freely within the preset range, further enhancing the flexibility and adaptability of the measuring mechanism. In addition, by rationally designing the stroke of the cylinder 133 and the length of the vacuum rod 131, this embodiment not only meets the measurement requirements of the changes in the morphology of the human back, but also ensures the accuracy and reliability of the measurement results.

[0052] Reference Figure 1 and Figure 3 As an optional embodiment, the adjustment assembly 14 includes a handwheel 141, a screw rod 142 arranged on the inner side of the handwheel 141, a straight rod 143 arranged on one side of the screw rod 142, a headrest 144 arranged on one side of the screw rod 142, and a pull plate 145 fixedly connected to the end of the clamping rod 123.

[0053] In this embodiment, the adjustment assembly 14 drives the capture assembly 13 up and down on the slide rail 11 via a screw rod, allowing it to adjust to the back position of different people. Sliders are provided on both sides of the straight rod 143, which slide and engage with the slide rail 11. A set of straight rods are mounted horizontally on the upper end of the slide rail 11. A handwheel 141 is fixed to each straight rod. The axis of the handwheel 141 is connected to a set of screw rods 142. The bottom of the screw rods 142 is threadedly connected to a pull plate 145, which is fixedly engaged with the end surface of the clamping rod 123. When the handwheel 141 is turned, the screw rod 142 rotates, driving the pull plate 145 to move up and down. Furthermore, a headrest 144 is connected to the screw rod 142.

[0054] Specifically, the design of the headrest 144 not only provides the user with comfortable head support, but also realizes flexible adjustment of the headrest height through its connection with the screw 142. The headrest 144 is fixed to the groove of the aluminum profile by bolts and a heightening pad, and can move up and down above the back plate. By fastening with bolts, the headrest 144 can be fixed at a certain height, and there is a groove in the headrest that can be clamped on the headrest plate for easy adjustment and replacement. This design enables the measuring mechanism to take into account changes in the head position when capturing the backrest shape, thereby improving the accuracy and comfort of the overall measurement. In addition, the sliding fit of the slider on the straight rod 143 and the slide rail 11 ensures the stability and smoothness of the adjustment component 14 during movement, avoiding the situation where the measurement results are affected by shaking or jamming.

[0055] In summary, the adjustment component 14 in this embodiment, through its sophisticated design, realizes the flexible up and down movement of the capture component 13 on the slide rail 11, effectively adapts to the back position requirements of different people, and improves the applicability and practicality of the measuring mechanism.

[0056] Reference Figures 1 to 4 In one embodiment provided in the present application, the measuring component 16 includes a displacement sensor 161 fixedly mounted on the cylinder 133, a fixing bracket 162 disposed at the rear end of the limit plate 121, a back plate 163 disposed on the inner side of the fixing bracket 162, a laser displacement sensor 164 disposed on the end surface of the back plate 163, and a displacement digital display 165 disposed on the support frame 15.

[0057] In one embodiment provided in the present application, the displacement sensor 161 is used to measure the movement distance of each vacuum rod 131;

[0058] The laser displacement sensor 164 measures the position change of the surface of each sliding rod 132 based on the principle of laser triangulation reflection.

[0059] In one embodiment provided in the present application, the number of longitudinal movement points of the displacement sensor 161 corresponds to the longitudinal number of the slide bar 132;

[0060] The displacement sensor 161 simulates a line in the transverse direction by displacing the control point, and then simulates the shape of the entire backrest by the transverse line.

[0061] In this embodiment, each cylinder 133 is equipped with a displacement sensor 151. The displacement control points simulate a horizontal line, which in turn simulates the overall backrest shape. The number of longitudinal points at which the displacement sensor 161 moves corresponds to the number of longitudinal vacuum rods 131.

[0062] In this device, a displacement sensor 161 precisely measures the distance traveled by each vacuum rod 131. The laser displacement sensor 164, the core component of displacement measurement, operates based on the principle of laser triangulation. When a laser beam is emitted from the sensor onto the surface of the vacuum rod 131 being measured, the reflected light is collected by the sensor's internal optical system and focused onto a position-sensitive detector (PSD). According to the principles of geometric optics, changes in the position of the surface of the vacuum rod 131 being measured cause changes in the image position of the reflected light on the PSD. By precisely measuring this change in image position, the displacement of the vacuum rod 131 can be accurately calculated.

[0063] Specifically, the back of the laser displacement sensor 164 fits tightly against the back panel 163, forming a stable structural support. This allows the laser displacement sensor 164 to be flexibly and precisely moved to the position of the vacuum rod 131 where measurement is required. When the vacuum rod 131 shifts, the laser displacement sensor 164 accurately captures this displacement change in real time, converting it into an electrical signal. This data is then efficiently transmitted via a data cable to the displacement digital display 165. The displacement digital display 165 is located on the outside of the control cover, providing the operator with an intuitive and convenient way to read the displacement value.

[0064] Reference Figures 1 to 6 This embodiment provides an office chair, including a seat unit 2, including a backrest adjustment component 21, a movable seat surface 22 arranged on one side of the backrest adjustment component 21, baffles 23 arranged on both sides of the movable seat surface 22, a slide plate 24 arranged on the inner side of the baffle 23, and a pulley 25 arranged at the bottom of the baffle 23.

[0065] In one embodiment provided in the present application, the backrest adjustment assembly 21 includes a first hinged seat 211, a hydraulic rod 212 hinged to one side of the first hinged seat 211, a second hinged seat 213 disposed at the bottom of the hydraulic rod 212, and a fixed seat 214 fixed to the bottom of the second hinged seat 213;

[0066] The fixing seat 214 is fixedly connected to the baffle 23 .

[0067] In one embodiment provided in the present application, the movable seat surface 22 is slidingly arranged on a base plate 221 on a slide plate 24, a guide cylinder 222 is arranged on the inner side of the base plate 221, a support rod 223 is arranged on the inner side of the guide cylinder 222, and a seat 224 is arranged on the end surface of the support rod 223.

[0068] In this embodiment, the movable seat surface 22 is disposed inside a baffle 23, which is constructed by welding a plurality of aluminum profiles. The backrest adjustment assembly 21 comprises a first hinged seat 211, a hydraulic rod 212 hinged to one side of the first hinged seat 211, a second hinged seat 213 disposed at the bottom of the hydraulic rod 212, and a fixed seat 214 fixed to the bottom of the second hinged seat 213. The first hinged seat 211 is fixedly connected to the bottom of the backrest unit 1, and the first hinged seat 211 is hinged to the output end of the hydraulic rod 212. The base of the hydraulic rod 212 is hinged to the second hinged seat 213, and the second hinged seat 213 is fixedly connected to the baffle 23. The linear motion of the hydraulic rod 212 enables stepless adjustment of the backrest angle. Based on measurements of the static backrest angles of existing office chairs, the range is 62°-93°, and the range for resting sitting is 83°-112°. Therefore, the starting static backrest angle is 98°. The stepless adjustment mechanism allows for varying angles between the backrest and the seat, with an adjustable range of 90°-135°.

[0069] In this embodiment, the movable seat 22 is primarily composed of a base plate 221, a guide tube 222, a support rod 223, and a seat 224. The upper portion of the support rod 223 is connected to the seat 224, and the lower portion is connected to the seat plate 221 via the guide tube 222 and bolts. The movable seat 22 can be adjusted in depth by moving the slide plate 24 forward and backward to accommodate users of different body shapes.

[0070] Finally, it should be pointed out that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. A backrest shape capture and dimension measurement mechanism, characterized by: include, A backrest unit (1) comprises two sets of slide rails (11), a fixing frame (12) arranged inside the slide rails (11), a capture component (13) arranged inside the fixing frame (12), an adjustment component (14) arranged on the top of the capture component (13), a support frame (15) arranged at the rear end of the adjustment component (14), and a measuring component (16) arranged on the support frame (15); The capture component (13) is used to display the angle, depth or shape of the back; The measuring component (16) is used to measure the displacement of the capturing component (13).

2. The backrest shape capturing and measuring mechanism according to claim 1, characterized in that: The fixing frame (12) comprises a limiting plate (121), two groups of pressing plates (122) slidably connected to the slide rail (11), and a plurality of groups of clamping rods (123) arranged in a linear array inside the pressing plates (122); The capture assembly (13) includes a plurality of vacuum rods (131) arrayed in the slots of the clamping rod (123), a sliding rod (132) arranged at the axis of the vacuum rod (131), and a cylinder (133) arranged at the end of the sliding rod (132).

3. The backrest shape capturing and measuring mechanism according to claim 2, characterized in that: The cylinder (133) controls each vacuum rod (131) to move forward and backward within a certain range; The clamping rod (123) includes a plurality of limiting grooves (1231) arranged on the inner side thereof; The plurality of vacuum rods (131) are slidably limited in the limiting groove (1231) and can simulate backrests of different shapes.

4. The backrest shape capturing and measuring mechanism according to claim 3, characterized in that: The adjustment assembly (14) includes a hand wheel (141), a screw rod (142) arranged inside the hand wheel (141), a straight rod (143) arranged on one side of the screw rod (142), a headrest (144) arranged on one side of the screw rod (142), and a pull plate (145) fixedly connected to the end of the clamping rod (123).

5. The backrest shape capturing and measuring mechanism according to claim 4, characterized in that: The measuring assembly (16) comprises a displacement sensor (161) fixedly mounted on the cylinder (133), a fixing frame (162) mounted at the rear end of the limiting plate (121), a back-transparent plate (163) mounted inside the fixing frame (162), a laser displacement sensor (164) mounted on the end surface of the back-transparent plate (163), and a displacement digital display (165) mounted on the supporting frame (15).

6. The backrest shape capturing and measuring mechanism according to claim 5, characterized in that: The displacement sensor (161) is used to measure the moving distance of each vacuum rod (131); The laser displacement sensor (164) measures the position change of the surface of each sliding rod (132) based on the laser triangulation reflection principle.

7. The backrest shape capturing and dimension measuring mechanism according to claim 6, characterized in that: The number of longitudinal movement points of the displacement sensor (161) corresponds to the longitudinal number of the slide bar (132); The displacement sensor (161) simulates a line in the transverse direction by displacing a control point, and then simulates the shape of the entire backrest by using the line in the transverse direction.

8. An office chair, characterized in that: The device comprises the backrest shape capturing and measuring mechanism according to any one of claims 1 to 7, and further comprises: A seat unit (2) comprises a backrest adjustment component (21), a movable seat surface (22) arranged on one side of the backrest adjustment component (21), baffles (23) arranged on both sides of the movable seat surface (22), a slide plate (24) arranged on the inner side of the baffle (23), and a pulley (25) arranged at the bottom of the baffle (23).

9. The office chair according to claim 8, characterized in that: The backrest adjustment assembly (21) comprises a first hinged seat (211), a hydraulic rod (212) hinged to one side of the first hinged seat (211), a second hinged seat (213) arranged at the bottom of the hydraulic rod (212), and a fixed seat (214) fixedly arranged at the bottom of the second hinged seat (213); The fixing seat (214) is fixedly connected to the baffle (23).

10. The office chair according to claim 9, characterized in that: The movable seat surface (22) is slidably arranged on a base plate (221) on the slide plate (24), a guide cylinder (222) is arranged on the inner side of the base plate (221), a support rod (223) is arranged on the inner side of the guide rod (222), and a seat (224) is arranged on the end surface of the support rod (223).

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