An experimental device for studying the health and comfort of desks and chairs

Abstract

The present invention relates to an experimental device for studying the health and comfort of desks and chairs, comprising a bottom plate assembly for placing desks and chairs, a seat surface and backrest height difference detection mechanism and a body pressure pad fixing mechanism, wherein the seat surface and backrest height difference detection mechanism is arranged on the upper part of the body pressure pad fixing mechanism, and the seat surface and backrest height difference detection mechanism comprises an X-axis adjustment rod, a Y-axis adjustment rod, a Z-axis adjustment rod and a displacement sensor which are arranged to slide vertically in pairs, and position locking blocks are arranged on the X-axis adjustment rod, the Y-axis adjustment rod and the Z-axis adjustment rod, and the displacement sensor is connected to one end of the Z-axis adjustment rod through a flip adjustment block, and the flip adjustment block makes the displacement sensor face the seat surface or the backrest. The device of the present invention has a reasonable structure and is easy to operate.

Description

Technical Field

[0001] The invention relates to furniture product testing equipment, in particular to an experimental device for studying the health and comfort of desks and chairs. Background Art

[0002] Desks and chairs are the desks and chairs used by students in class. They are a type of desks and chairs, also called student desks and chairs, school desks and chairs. Desks and chairs can be divided according to age, material, and function. At present, the structure and shape of desks and chairs in primary and secondary schools are relatively ordinary. Primary and secondary school students are prone to severe fatigue after daily use. Some self-proclaimed ergonomic chairs have unreasonable designs, which will affect the health and comfort of students.

[0003] When students use desks and chairs, they sit in two different postures: leaning forward when writing and standing back when listening to lectures. Often, when writing, the buttocks only sit on 1 / 2-2 / 3 of the seat surface, while when listening to lectures, the buttocks occupy 2 / 3-3 / 4 of the seat surface. The distance between the chair and the desk is also different. At the same time, different age groups have different heights and different requirements for the comfort of desks and chairs, so relevant research needs to be carried out. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide an experimental device for studying the health and comfort of desks and chairs, which has a reasonable structure and is easy to operate.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An experimental device for studying the health and comfort of desks and chairs, comprising a bottom plate assembly for placing desks and chairs, a seat surface and seat back height difference detection mechanism and a body pressure pad fixing mechanism, wherein the seat surface and seat back height difference detection mechanism is arranged on the upper part of the body pressure pad fixing mechanism, and the seat surface and seat back height difference detection mechanism comprises an X-axis adjustment rod, a Y-axis adjustment rod, a Z-axis adjustment rod and a displacement sensor which are arranged to slide vertically in pairs, and position locking blocks are arranged on the X-axis adjustment rod, the Y-axis adjustment rod and the Z-axis adjustment rod, and the displacement sensor is connected to one end of the Z-axis adjustment rod through a flip adjustment block, and the flip adjustment block makes the displacement sensor face the seat surface or the seat back.

[0007] As a preferred solution: the body pressure pad fixing mechanism includes a vertical frame and a horizontal adjustment frame movably arranged on the vertical frame through an adjustment block, and the horizontal adjustment frame is also evenly spaced with a plurality of fixing buckles for fixing the body pressure pad.

[0008] As a preferred solution: the stand comprises columns on both sides and a crossbeam fixed on the top of the columns, and a plurality of fixing buckles are arranged at intervals on the crossbeam.

[0009] As a preferred solution: the base plate assembly includes a metal profile frame, a fixed plate fixed in the middle of the metal profile frame, and a movable plate arranged on both sides of the fixed plate and slidably connected to the metal profile frame, the supporting legs on both sides of the desk are respectively arranged on two movable plates, and the chair is arranged on the fixed plate.

[0010] As a preferred solution: a plurality of chair leg fixing assemblies for fixing the chair are also slidably disposed on both sides of the fixing plate where the chair is located.

[0011] As a preferred solution: the chair leg fixing assembly includes a vertical rod and a horizontal rod connected by an adjustment block, and a locking screw is also penetrated through the inner end of the horizontal rod.

[0012] As a preferred solution: the flip adjustment block is a first plate and a second plate hinged to each other at one end, the other end of the first plate is fixed to the Z-axis adjustment rod, the other end of the second plate is fixed to the displacement sensor, and the first plate and the second plate are limited at an angle of 90 degrees or 180 degrees.

[0013] As a preferred solution: the adjustment block is a connection block with vertical through holes and horizontal through holes, and locking bolts are provided on both sides of the connection block.

[0014] As a preferred solution: the X-axis adjustment rod, Y-axis adjustment rod and Z-axis adjustment rod are all linear guides, the position locking block is a slider that cooperates with the linear guide, and the slider of the X-axis adjustment rod is fixed to the slider of the Y-axis adjustment rod, and the slider of the Z-axis adjustment rod is fixed to one end of the X-axis adjustment rod.

[0015] The present invention is an experimental device for the health and comfort of desks and chairs. This equipment can be used to carry out various types of research, providing reference value for the placement guidance of desks and chairs in primary and secondary schools and the technical research and development of desk and chair manufacturers. The present invention places desks and chairs on the bottom plate assembly. During measurement, students first sit on the chairs, and then move the desks to the position required by the experiment. It is used to study the rationality of the relative position distance relationship between desks and chairs relative to students with different sitting postures and different heights, and the distance between desks and chairs affects students' health and comfort. Secondly, it can measure the body pressure distribution of students' sitting posture when desks and chairs are used at the same time, so as to analyze the influence of the shape of the chair surface and chair back on students' sitting comfort. Thirdly, it can measure the height difference of the curved surface of the chair surface and chair back, which is used to experimentally compare the different needs of students of different ages for seats. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a structural schematic diagram of the seat seat and backrest height difference detection mechanism of the present invention.

[0018] Figure 3 It is a structural schematic diagram of the body pressure pad fixing mechanism of the present invention. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0020] like Figures 1 to 3 An experimental device for studying the health and comfort of desks and chairs shown in the figure includes a base plate assembly for placing desks 4 and chairs 5, a seat surface and seat back height difference detection mechanism 1 and a body pressure pad fixing mechanism 2, wherein the seat surface and seat back height difference detection mechanism 1 is arranged on the upper part of the body pressure pad fixing mechanism 2, and the seat surface and seat back height difference detection mechanism 1 includes an X-axis adjustment rod 13, a Y-axis adjustment rod 15, a Z-axis adjustment rod 11, and a displacement sensor 19, which are arranged to slide vertically in pairs, and position locking blocks are provided on the X-axis adjustment rod 13, the Y-axis adjustment rod 15, and the Z-axis adjustment rod 11, and the displacement sensor 19 is connected to one end of the Z-axis adjustment rod 11 through a flip adjustment block 18, and the flip adjustment block 18 makes the displacement sensor 19 face the seat surface or the seat back.

[0021] The body pressure pad fixing mechanism 2 includes a vertical frame and a horizontal adjustment frame 24 movably arranged on the vertical frame through an adjustment block 22. The horizontal adjustment frame 24 is also evenly spaced with a plurality of fixing buckles 23 for fixing the body pressure pad.

[0022] The stand comprises columns 21 on both sides and a crossbeam fixed on the top of the columns 21 , and a plurality of fixing buckles 23 are arranged at intervals on the crossbeam.

[0023] The base plate assembly includes a metal profile frame 31, a fixed plate 33 fixed in the middle of the metal profile frame 31, and a movable plate 32 arranged on both sides of the fixed plate 33 and slidably connected to the metal profile frame 31. The supporting legs on both sides of the desk 4 are respectively arranged on the two movable plates 32, and the chair 5 is arranged on the fixed plate 33.

[0024] A plurality of chair leg fixing assemblies 25 for fixing the chair 5 are also slidably disposed on both sides of the fixing plate 33 where the chair 5 is located.

[0025] The chair leg fixing assembly 25 includes a vertical rod and a horizontal rod connected by an adjustment block 22, and a locking screw is also penetrated through the inner end of the horizontal rod.

[0026] The flip adjustment block is a first plate 17 and a second plate 18 hinged to each other at one end, the other end of the first plate 17 is fixed to the Z-axis adjustment rod 11, the other end of the second plate 18 is fixed to the displacement sensor 19, and the first plate 17 and the second plate 18 are limited at an angle of 90 degrees or 180 degrees.

[0027] The adjusting block 22 is a connecting block with vertical through holes and horizontal through holes, and locking bolts are arranged on both sides of the connecting block.

[0028] The X-axis adjustment rod 13, the Y-axis adjustment rod 15, and the Z-axis adjustment rod 11 are all linear guides. The position locking block is a slider that cooperates with the linear guide, and a locking screw is provided on the slider. The position locking block includes a first locking block 14 that is slidably connected to the X-axis adjustment rod 13, a second locking block 16 that is slidably connected to the Y-axis adjustment rod 16, and a third locking block 12 that is slidably connected to the Z-axis adjustment rod 11. The first locking block 14 and the second locking block 16 are fixed to each other, and the third locking block 12 is fixed to one end of the X-axis adjustment rod 13.

[0029] When in use, the desk is initially moved to the front to facilitate the tester to enter the test area; during the test, the tester can adjust the front and back distance of the desk to get a more comfortable position.

[0030] Then adjust the body pressure pad fixing mechanism 2, the specific operation steps are as follows:

[0031] 1. The seat back is close to the equipment column and placed in the center of the left and right sides above the fixing plate of the bottom plate assembly;

[0032] 2. By adjusting the seat fixing assembly, seats of various shapes can be fixed on the fixing plate;

[0033] 3. The tester adjusts the seat to a suitable height and the horizontal adjustment frame to the corresponding position (slightly lower than the seat surface);

[0034] 4. Lay the seat cushion flat on the seat and use the fixing buckle on the horizontal adjustment frame to firmly fix the seat cushion on the seat;

[0035] 5. At the same time, fix the other body pressure pad to the seat back in the same way.

[0036] Finally, adjust the seat back height difference detection mechanism 1. The specific operation steps are as follows:

[0037] 1. When detecting the height difference of the seat surface, first select the height difference section position to be detected, and fix the X-axis adjustment rod or the Y-axis adjustment rod;

[0038] 2. Adjust the height of the Z-axis adjustment rod to make the sensor within its detection range, ensure its normal operation, and fix the Z-axis adjustment rod;

[0039] 3. The tester manually moves the Y-axis or X-axis slowly from one end of the seat to the other, records the data when passing through the higher or lower position of the seat surface, and then calculates the height difference;

[0040] 4. When you need to test the height difference of the chair back, rotate the sensor 90° and follow the other steps as above.

[0041] The body pressure pad fixing mechanism 2 is used to fix the body pressure collection pad so that it does not move. Specifically, the body pressure collection pad is firmly fixed on the desk and chair, and should not move during sitting. The auxiliary table can be applied to various desks and chairs on the market, ensuring that the body pressure pad can be adjusted to the following positions during use.

[0042] 1. Body pressure pad of the seat: When measuring, the bottom line of the body pressure pad sensing area just touches the horizontal plane of the seat surface. The general adjustment height of the seat surface is 300mm-450mm.

[0043] 2. Body pressure collection pad of the chair back: When measuring, the center axis point of the lower edge of the backrest is vertically mapped to the intersection of the horizontal plane of the seat surface as the reference.

[0044] 3. The central axes of the two body pressure pads should be aligned with the central axes of the seat surface and the chair back respectively. During normal experimental sitting, the deviation of the body pressure pad should not exceed 1 cm.

[0045] The seat surface and seat back height difference detection mechanism 1 is used for measuring the seat surface and seat back surfaces with various shaped curved surfaces designed to imitate the curves of legs and hips, and testing the difference between the highest point and the lowest point of the curved surface.

[0046] The present invention evaluates the health, safety and comfort characteristics of desks and chairs by analyzing body pressure distribution and seat height, seat depth, and the height difference between the seat and the backrest.

[0047] It should be noted that the above embodiments are only representative examples of the present invention. The present invention can also have many variations. Any simple modification, equivalent changes and modifications made to the above embodiments based on the essence of the present invention should be considered to belong to the protection scope of the present invention.

Claims

1. An experimental device for studying the health and comfort of desks and chairs, characterized by: The invention comprises a bottom plate assembly for placing desks (4) and chairs (5), a seat surface and seat back height difference detection mechanism (1) and a body pressure pad fixing mechanism (2), wherein the seat surface and seat back height difference detection mechanism (1) is arranged on the upper part of the body pressure pad fixing mechanism (2), and the seat surface and seat back height difference detection mechanism (1) comprises an X-axis adjustment rod (13), a Y-axis adjustment rod (15), a Z-axis adjustment rod (11) arranged to slide vertically in pairs, and a displacement sensor (19), wherein position locking blocks are arranged on the X-axis adjustment rod (13), the Y-axis adjustment rod (15), and the Z-axis adjustment rod (11), and the displacement sensor (19) is connected to one end of the Z-axis adjustment rod (11) by means of a flip adjustment block, and the flip adjustment block makes the displacement sensor (19) face the seat surface or the seat back; The body pressure pad fixing mechanism (2) comprises a vertical frame and a horizontal adjustment frame (24) movably arranged on the vertical frame through an adjustment block (22); the horizontal adjustment frame (24) is also evenly spaced with a plurality of fixing buckles (23) for fixing the body pressure pad; The stand comprises columns (21) on both sides and a crossbeam fixed on the top of the column (21), and a plurality of fixing buckles (23) are arranged at intervals on the crossbeam; The base plate assembly comprises a metal profile frame (31), a fixed plate (33) fixed to the middle of the metal profile frame (31), and movable plates (32) arranged on both sides of the fixed plate (33) and slidably connected to the metal profile frame (31), the supporting legs on both sides of the desk (4) are respectively arranged on the two movable plates (32), and the chair (5) is arranged on the fixed plate (33); The flip adjustment block comprises a first plate (17) and a second plate (18) which are hinged to each other at one end, the other end of the first plate (17) is fixed to the Z-axis adjustment rod (11), the other end of the second plate (18) is fixed to the displacement sensor (19), and the first plate (17) and the second plate (18) are limited at an angle of 90 degrees or 180 degrees.

2. The experimental device for studying the health and comfort of desks and chairs according to claim 1 is characterized by: A plurality of chair leg fixing assemblies (25) for fixing the chair (5) are also slidably disposed on both sides of the fixing plate (33) on which the chair (5) is located.

3. The experimental device for studying the health and comfort of desks and chairs according to claim 2 is characterized by: The chair leg fixing assembly (25) comprises a vertical rod and a horizontal rod connected by an adjustment block (22), and a locking screw is also provided through the inner end of the horizontal rod.

4. The experimental device for studying the health and comfort of desks and chairs according to claim 1 is characterized by: The adjusting block (22) is a connecting block provided with a vertical through hole and a horizontal through hole, and locking bolts are provided on both sides of the connecting block.

5. The experimental device for studying the health and comfort of desks and chairs according to claim 1 is characterized by: The X-axis adjustment rod (13), the Y-axis adjustment rod (15), and the Z-axis adjustment rod (11) are all linear guides, the position locking block is a slider that cooperates with the linear guide, and the slider of the X-axis adjustment rod (13) is fixed to the slider of the Y-axis adjustment rod (15), and the slider of the Z-axis adjustment rod (11) is fixed to one end of the X-axis adjustment rod (13).

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