A chair surface height detection method, medium and device for hiding a wiring

Abstract

This invention discloses a method for detecting the height of a chair surface with irregularities, relating to the field of metrology for irregular surfaces. The method includes the following steps: S1, providing an airbag located above the chair surface, the top of the airbag having an airtight pipe with a sealing block slidably disposed inside, the portion of the airtight pipe below the sealing block forming a sealed cavity with the airbag; S2, driving the airtight pipe and the airbag to move towards the irregular surface on the chair surface; S3, detecting the pressure of the airbag pressing against the chair surface, when the pressure reaches a set threshold, triggering the airbag to stop moving, and recording a first height of the airtight pipe; S4, calculating the difference between the first height and a height calibration value, and summing the difference with a standard chair surface height to obtain the height of the chair surface being measured. This invention enables accurate height detection of chair surfaces with irregularities under pressure without requiring the selection of a detection reference point.

Description

[0001] Cross-references to related applications

[0002] This application is a divisional application of Chinese patent application No. 2024107050128, filed on June 3, 2024, entitled "A method, medium and device for detecting the height of a chair with an irregular surface". Technical Field

[0003] This invention relates to the field of metrology for irregular surfaces, and more particularly to a method, medium, and device for detecting the height of a chair surface with irregular surfaces. Background Technology

[0004] In the research, development, production, and testing of office chairs, the width, seat height, seat depth, sitting depth, and armrest height are commonly used basic dimensional data. In addition, furniture ergonomics believes that the curved shape of the backrest and headrest of office chairs is also of great significance for the research and evaluation of office chair comfort.

[0005] For measuring seat height (i.e., chair surface height), a rangefinder is typically placed above the chair surface. However, existing methods have the following limitations:

[0006] 1. To provide a better user experience, seat surface shapes are becoming increasingly diverse, such as irregular surfaces designed to fit the shape of the buttocks. In this context, selecting a reference point for measuring seat surface height becomes a challenge.

[0007] 2. When a user sits on the chair, the seat surface will lower to some extent due to pressure, which is especially noticeable on chair surfaces covered with flexible materials. The height of the seat surface after this lowering is what users are most concerned about. Current chair surface testing processes measure the height under normal conditions, which has a certain margin of error compared to the actual height of the seat surface when the user is seated.

[0008] Therefore, developing a method to detect the height of a chair surface with irregularities under pressure is one of the urgent problems to be solved. Summary of the Invention

[0009] In order to solve at least one of the technical problems mentioned in the background art, the present invention aims to provide a method, medium and device for detecting the height of a chair surface with an irregular surface, which can accurately detect the height of a chair surface with an irregular surface under pressure without the need to select a detection reference point.

[0010] In a first aspect, the present invention provides a method for detecting the height of a chair surface with irregularities, comprising the following steps:

[0011] S1, an airbag is provided above the seat surface, and an airtight pipe with a sealing block slidably disposed inside is provided on the top of the airbag. The part of the airtight pipe below the sealing block forms a sealed cavity with the airbag.

[0012] S2, drive the airtight pipe and airbag to move toward the irregular surface of the chair;

[0013] S3, detect the pressure of the airbag pressing against the seat surface. When the pressure reaches a set threshold, trigger the airbag to stop moving and record the first height of the airtight pipe.

[0014] S4. Calculate the difference between the first height and the height calibration value, and sum the difference with the standard chair surface height to obtain the height of the measured chair surface.

[0015] In some embodiments of the first aspect of the present invention, the height calibration value is the height recorded after testing a standard chair surface using steps S1 to S3.

[0016] In some embodiments of the first aspect of the present invention, the method for triggering the airbag to stop moving in step S3 is as follows:

[0017] A compression spring is provided above the sealing block to provide pressure to the airbag. A touch switch is provided inside the airtight pipe above the sealing block. The height of the touch switch is set such that the bottom of the touch switch and the compression spring in its natural state are separated by a first interval, which is equal to the threshold divided by the elastic coefficient of the compression spring.

[0018] In some embodiments of the first aspect of the present invention, the initial state of the sealing block is set as follows:

[0019] When the compression spring is in its natural state, air is pumped into the sealing cavity, causing the sealing block to move upward until it contacts the bottom of the compression spring, at which point the inflation stops.

[0020] In some embodiments of the first aspect of the present invention, the bottom of the airtight pipe is provided with a mounting plate extending in a horizontal direction, and the airbag is sealed to the bottom surface of the mounting plate.

[0021] In some embodiments of the first aspect of the invention, in S1, the periphery of the airbag is further blocked to limit the extension of the airbag in the horizontal direction.

[0022] In some embodiments of the first aspect of the present invention, the method for blocking the periphery of the airbag is as follows:

[0023] Several baffles are arranged in a circular array along the periphery of the airbag, and the baffles extend in a vertical direction.

[0024] In some embodiments of the first aspect of the present invention, the baffle strips are slidably connected to the mounting plate in the vertical direction. When the airbag moves toward the seat surface, the baffle strips that first contact the seat surface stop moving and slide relative to the mounting plate, while the remaining baffle strips continue to descend until they contact the seat surface.

[0025] In a second aspect, the present invention provides a computer storage medium having a computer program stored thereon, characterized in that, when the program is executed by a processor, it implements a method for detecting the height of a chair surface with irregular surfaces as described in the first aspect.

[0026] Thirdly, the present invention provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, when the processor executes the computer program, it implements a method for detecting the height of a chair surface with irregular surfaces as described in the first aspect.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] On the one hand, this invention utilizes the deformability of the airbag to adapt to irregular surfaces of the chair, thus eliminating the need to select a specific reference point during testing. On the other hand, this invention simulates the user's weight by applying pressure to the chair surface using the airbag. As the airbag gradually presses against the chair surface, the pressure increases accordingly. When the pressure reaches a set threshold, equivalent to simulating the user's weight, the airbag's movement stops, thereby simulating the precise chair height detected when the user is seated. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a seat structure with irregular surfaces.

[0030] Figure 2 This is a flowchart of the overall method of the present invention.

[0031] Figure 3 This is a structural diagram of the device of the present invention.

[0032] Figure 4 This is a cross-sectional view of the device of the present invention.

[0033] Figure 5 This is a schematic diagram of the internal structure of the airtight pipe of the present invention.

[0034] Figure 6 This is a schematic diagram of the airbag deformation under pressure according to the present invention.

[0035] Figure 7 for Figure 4 A magnified view of the compressed spring at point A in its natural state.

[0036] Figure 8 yes Figure 7 Enlarged view of section B in the middle.

[0037] Figure 9 for Figure 4 A magnified view of the compressed spring at point A in the compressed state.

[0038] Figure 10 This is a schematic diagram of a blocking mechanism according to another embodiment of the present invention.

[0039] Figure 11 This is a schematic diagram of the airbag deformation under pressure of the present invention with a blocking mechanism.

[0040] In the picture:

[0041] 1. Seat; 11. Seat surface; 12. Irregular surface;

[0042] 2. Airtight pipes; 21. Sealing blocks;

[0043] 3. Airbags;

[0044] 41. Compression spring; 42. Top cap; 43. First wiring channel;

[0045] 5. Lifting mechanism; 51. Guide rail; 52. Slide block; 53. Controller; 54. Mounting bracket; 55. Second cable tray;

[0046] 6. Air valve;

[0047] 7. Mounting plate; 71. Mounting slot;

[0048] 81. Touch switch; 82. First wire;

[0049] 9. Barrier strip; 91. Anti-slip cap. Detailed Implementation

[0050] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] Example 1:

[0052] Please refer to Figure 1 As ergonomic research has deepened, it has become commonplace to have irregular surfaces 12 on the seat surface 11 of the seat 1. The shape of the irregular surface 12 is adapted to the shape of the human buttocks, thereby providing a uniform force surface for the user sitting on the seat surface 11, thus giving the user a better experience.

[0053] When performing height detection on the seat 11 containing the irregular surface 12, the existing detection equipment often struggles to select a reference point due to the unevenness of the irregular surface 12, and the detection results often have large deviations due to the movement of the seat.

[0054] On the other hand, existing testing equipment often measures the seat height in its natural state (without pressure), rather than the actual seat height when the user is seated (under pressure), which does not match the user's actual needs.

[0055] Based on this, this embodiment proposes a chair surface height detection method, which aims to accurately detect the height of a chair surface with an irregular surface under pressure.

[0056] like Figure 2 As shown, the height detection method includes the following steps:

[0057] S1, please refer to Figure 3 , Figure 4 and Figure 5 An airbag 3 is provided above the seat 11. The airbag 3 is made of a flexible material and can be deformed under pressure.

[0058] The top of the airbag 3 is provided with an airtight pipe 2, in which a sealing block 21 is slidably disposed internally. The airtight pipe 2 is vertically arranged to provide an airflow channel. It is worth mentioning that the sealing block 21 and the airtight pipe 2 are sealed together.

[0059] The airbag 3 is located at the bottom of the airtight pipe 2, and the part of the airtight pipe 2 below the sealing block 21 forms a sealing cavity 30 with the airbag 3; as the airbag 3 is compressed, the sealing block 21 can be displaced within the airtight pipe 2.

[0060] Meanwhile, in order to allow the sealed cavity 30 to be filled and released, an air valve 6 for filling and releasing air is provided at the location of the sealed cavity 30.

[0061] S2, drive the airtight pipe 2 and airbag 3 toward the irregular surface 12 on the seat 11.

[0062] In this embodiment, the lifting mechanism 5 is used. The lifting mechanism 5 adopts an electric rail and includes a vertically arranged guide rail 51, a slide block 52 slidably connected to the guide rail 51, and a controller 53 that drives the slide block 52 to move along the guide rail.

[0063] In order to connect the lifting mechanism 5 with the airtight pipe 2, a mounting bracket 54 is provided on the slide 52, and the airtight pipe 2 is fixedly connected to the mounting bracket 54.

[0064] It is worth mentioning that, in order to maintain balance, eliminate torque or reduce stress between guide rail 51 and slide 52, the airtight pipe 2 is fixedly connected to the middle of the mounting bracket 54, and a set of guide rail 51 and slide 52 are respectively provided at both ends of the mounting bracket 64 to drive the airtight pipe 2 and the airbag.

[0065] It is worth mentioning that a second wire is electrically connected between the controller 53 and the slide 52. In order to realize the routing of the second wire, a second wiring groove 55 connecting the controller 53 and the slide 52 is provided in the mounting bracket 54.

[0066] S3, detect the pressure of the airbag 3 pressing against the seat surface 11. When the pressure reaches a set threshold, trigger the airbag 3 to stop moving and record the first height H1 of the airtight pipe 21.

[0067] Specifically, the method to trigger the airbag to stop moving is as follows:

[0068] like Figure 7 and Figure 8 As shown, a compression spring 41 is provided above the sealing block 21 to provide pressure to the airbag 3, and a touch switch 81 is provided inside the airtight pipe 2 above the sealing block 21.

[0069] In order to ensure that the pressure on the airbag 3 is exactly equal to the set threshold when the lifting mechanism 5 stops moving, the height of the touch switch 81 is set such that the bottom of the touch switch 81 and the compression spring 41 in its natural state are separated by a first interval, which is equal to the threshold divided by the elastic coefficient of the compression spring.

[0070] It is worth noting that the threshold is selected with reference to the weight of an adult. For example, the threshold corresponding to an adult weighing 65kg can be selected as 65kg*9.8N / kg, so that when the lifting mechanism 5 stops, the pressure provided by the compression spring 41 on the airbag 3 (that is, the pressure that the airbag 3 finally applies to the seat surface 11) is equivalent to the pressure on the seat surface when the user sits down.

[0071] Meanwhile, the initial state of the sealing block 21 is set as follows:

[0072] When the compression spring 41 is in its natural state, air is introduced into the sealing cavity 30 through the air valve 6, causing the sealing block 21 to move upward until the sealing block 21 contacts the bottom of the compression spring 41 and then the air injection stops.

[0073] like Figure 6 As shown, when the airbag 3 is compressed by the seat surface, it deforms, and the sealing block 21 moves upward accordingly. Figure 7 Switching to Figure 9The state of the mechanism pushes the compression spring 41 to compress until the sealing block 21 contacts the touch switch 81, which sends a stop signal to the lifting mechanism 5.

[0074] Therefore, during operation, the pressure of the airbag 3 pressing against the seat surface 11 is always equal to the elastic force provided by the compression spring 41. When the sealing block 21 contacts the touch switch 81, the compression amount of the compression spring 41 is equal to the first interval. Therefore, the elastic force provided by the compression spring 41 and the pressure of the airbag 3 pressing against the seat surface 11 are exactly equal to the set threshold, which simulates the state of an adult sitting on the seat surface 11.

[0075] like Figure 7 and Figure 9 As shown, in order to install the compression spring 41, a top cap 42 is also provided on the top of the airtight pipe 2, and the compression spring 41 is disposed between the top cap 42 and the sealing block 21.

[0076] like Figure 8 As shown, in order to realize the signal transmission of the touch switch 81, a first wire 82 is provided between the touch switch 81 and the controller 53. At the same time, in order to realize the routing of the first wire 82, a first routing groove 43 is provided on the top cap 42 corresponding to the position of the first wire 82.

[0077] Airbag 3 has a certain volume to accommodate larger, irregular surfaces, such as... Figure 5 and Figure 6 As shown, the bottom of the airtight pipe 2 is provided with a mounting plate 7 extending in the horizontal direction, and the airbag 2 is sealed to the bottom surface of the mounting plate 7.

[0078] Meanwhile, the air valve 6 is preferably installed on the mounting plate 7.

[0079] When the lifting mechanism 5 stops moving, the first height H1 of the airtight pipe 2 is recorded. To facilitate the acquisition of the first height H1, the height of the slide 52 or the mounting plate 7 can also be used instead.

[0080] S4, calculate the difference ΔH = H1 - H0 between the first height H1 and the height calibration value H0, and sum the difference ΔH with the standard chair surface height Hx to obtain the height H of the measured chair surface, i.e.:

[0081] H = ΔH + Hx = (H1 - H0) + Hx

[0082] The height calibration value H0 is the height recorded after testing the standard chair surface using steps S1 to S3.

[0083] Example 2:

[0084] The deformation of the airbag 3 in Example 1 in the horizontal direction after being squeezed is uncertain. If it is not restricted, the test results will also be deviated.

[0085] Therefore, in S1 of this embodiment 2, the periphery of the airbag is also blocked to limit the extension of the airbag in the horizontal direction.

[0086] Specifically, the method for blocking the periphery of the airbag is as follows:

[0087] Please refer to Figure 10 and Figure 11 A plurality of baffles 9 are arranged in a circular array along the periphery of the airbag, and the baffles 9 extend vertically. The spacing between the baffles 9 can be freely selected. The smaller the spacing, the smaller the deformation of the airbag 3 on the periphery, and the higher the detection accuracy of the seat height detection device.

[0088] Furthermore, the guardrail 9 should be as close as possible to the seat surface 11 in the vertical direction. To allow the bottom of the guardrail 9 to adapt to the seat surface 11 (including irregular surfaces 12 or certain curved surfaces other than irregular surfaces 12), the mounting plate 7 in this embodiment is provided with a vertically penetrating mounting groove 71 corresponding to the position of each guardrail 9, and the guardrail 9 slides in the mounting groove 71.

[0089] This allows the barrier strip 9 and the mounting plate 7 to slide together vertically, such as... Figure 10 As shown, when the airbag 3 moves toward the seat surface 11, the first baffle 9 to contact the seat surface 11 stops moving and slides relative to the mounting plate 7. The remaining baffle 9 continue to descend until they contact the seat surface 11. Finally, the bottoms of all the baffle 9 contact the seat surface 11, further reducing the deformation of the airbag 3 in the horizontal direction and improving detection accuracy.

[0090] Meanwhile, in order to prevent the baffle strip 9 from detaching from the mounting plate 7 during the airbag 3's ascent, an anti-detachment cap 91 is provided on the top of the baffle strip 9, and the cross-section of the anti-detachment cap 91 is larger than that of the baffle strip 9.

[0091] Example 3:

[0092] This embodiment provides a computer storage medium storing a computer program, characterized in that, when the program is executed by a processor, it implements a method for detecting the height of a chair with an irregular surface as described in Embodiment 1 or Embodiment 2.

[0093] Example 4:

[0094] This embodiment provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. The feature is that when the processor executes the computer program, it implements a method for detecting the height of a chair surface with irregular surfaces as described in Embodiment 1 or Embodiment 2.

[0095] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A method for detecting the height of a chair surface with concealed wiring, characterized in that, Includes the following steps: S1, an airbag is provided above the seat surface, and an airtight pipe with a sealing block slidably disposed inside is provided on the top of the airbag. The part of the airtight pipe below the sealing block forms a sealed cavity with the airbag. S2, the airtight pipe and airbag are driven by the lifting mechanism to move toward the irregular surface of the chair. The lifting mechanism includes a vertically arranged guide rail, a slide block slidably connected to the guide rail, and a controller that drives the slide block to move along the guide rail. A mounting bracket is provided on the slide block, and the airtight pipe is fixedly connected to the mounting bracket. A second wire is electrically connected between the controller and the slide block, and a second wiring groove connecting the controller and the slide block is provided in the mounting bracket. S3, detect the pressure of the airbag pressing against the seat surface. When the pressure reaches a set threshold, trigger the airbag to stop moving and record the first height of the airtight pipe. S4, calculate the difference between the first height and the height calibration value, and sum the difference with the standard chair surface height to obtain the height of the measured chair surface; In step S3, the method for triggering the airbag to stop moving is as follows: A compression spring is provided above the sealing block to provide pressure to the airbag. A touch switch is provided inside the airtight pipe above the sealing block. The height of the touch switch is set such that the bottom of the touch switch and the compression spring in its natural state are separated by a first interval, which is equal to the threshold divided by the elastic coefficient of the compression spring. The initial state settings for the sealing block are as follows: When the compression spring is in its natural state, air is pumped into the sealing cavity, causing the sealing block to move upward until it contacts the bottom of the compression spring, at which point the inflation stops.

2. The chair surface height detection method with concealed wiring according to claim 1, characterized in that, The height calibration value is the height recorded after testing the standard chair surface using steps S1 to S3.

3. The chair surface height detection method for concealed wiring according to claim 1, characterized in that, The bottom of the airtight pipe is provided with a mounting plate that extends horizontally, and the airbag is sealed to the bottom surface of the mounting plate.

4. A method for detecting the height of a chair surface with concealed wiring according to claim 1 or 3, characterized in that, In S1, the periphery of the airbag is also blocked to limit the airbag's horizontal extension.

5. The chair surface height detection method with concealed wiring according to claim 4, characterized in that, The method for blocking the periphery of the airbag is as follows: Several baffles are arranged in a circular array along the periphery of the airbag, and the baffles extend in a vertical direction.

6. The chair surface height detection method with concealed wiring according to claim 5, characterized in that, The baffle strips are slidably connected to the mounting plate in the vertical direction. When the airbag moves toward the seat surface, the baffle strip that first contacts the seat surface stops moving and slides relative to the mounting plate, while the remaining baffle strips continue to descend until they contact the seat surface.

7. A computer storage medium having a computer program stored thereon, characterized in that, When executed by the processor, the program implements a chair height detection method with hidden wiring as described in any one of claims 1 to 6.

8. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements a chair height detection method with hidden wiring as described in any one of claims 1 to 6.

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