阅读说明：本技术 一种便携式汽车座椅连续硬度测试仪及测试方法 (Portable automobile seat continuous hardness tester and testing method ) 是由 王艳飞 黄玉强 魏凯 于 2021-09-07 设计创作，主要内容包括：本发明公开了一种便携式汽车座椅连续硬度测试仪及测试方法,属于汽车座椅表面硬度测试技术领域,包括测力模块、激光测距模块、连接支架及压盘连接杆,所述测力模块用于测量对座椅施加的压力值,所述激光测距模块用于测量座椅表面的形变量,所述测力模块的底端连接有压盘连接杆,压盘连接杆的底端螺纹连接有压盘,压盘连接杆上套置有连接支架,连接支架的两端连接有激光测距模块。该硬度测试仪及测试方法解决了现有技术中存在的测试地点和应用范围受到限制等问题。本发明采用激光测距系统替代传统的电动/气动刚体移动测距系统,大大增加测试精度和使用场合的灵活性。(The invention discloses a portable automobile seat continuous hardness tester and a testing method, which belong to the technical field of automobile seat surface hardness testing, and comprise a force measuring module, a laser distance measuring module, a connecting support and a pressure plate connecting rod, wherein the force measuring module is used for measuring a pressure value applied to a seat, the laser distance measuring module is used for measuring a deformation quantity of the surface of the seat, the bottom end of the force measuring module is connected with the pressure plate connecting rod, the bottom end of the pressure plate connecting rod is in threaded connection with a pressure plate, the connecting support is sleeved on the pressure plate connecting rod, and two ends of the connecting support are connected with the laser distance measuring module. The hardness tester and the testing method solve the problems that the testing place and the application range are limited in the prior art and the like. The laser ranging system is adopted to replace the traditional electric/pneumatic rigid body moving ranging system, so that the testing precision and the flexibility of the use occasion are greatly improved.)

1. The utility model provides a continuous hardness test appearance of portable car seat, its characterized in that, a continuous hardness test appearance of portable car seat, includes dynamometry module, laser rangefinder module, linking bridge (5) and pressure disk connecting rod (6), the dynamometry module is used for measuring the pressure value of applying to the seat, the laser rangefinder module is used for measuring the deformation volume on seat surface, the bottom of dynamometry module is connected with pressure disk connecting rod (6), and the bottom threaded connection of pressure disk connecting rod (6) has pressure disk (7), and linking bridge (5) have been put to pressure disk connecting rod (6) the cover, and the both ends of linking bridge (5) are connected with laser rangefinder module.

2. The portable automobile seat continuous hardness tester as claimed in claim 1, wherein the force measuring module comprises a signal processor, a controller, a display screen (2) and a force sensor (11), the force sensor (11) and the laser distance measuring sensor (4) are respectively electrically connected with the signal processor, the display screen (2), the force sensor (11) and the laser distance measuring sensor (4) are respectively electrically connected with the controller, the force sensor (11) and the laser distance measuring sensor (4) transmit collected signals to the signal processor, after the signals are processed by the signal processor, the controller transmits the processed signals to the display screen, and data are displayed on the display screen (2).

3. The portable automobile seat continuous hardness tester as claimed in claim 1, wherein the top end of the force measuring module is connected with a handle (1), the handle (1) is held by hand to apply pressure, and the pressure is transmitted to the seat or the foam surface through a pressure plate connecting rod (6) and a pressure plate (7) to cause compression deformation.

4. The portable automobile seat continuous hardness tester as claimed in claim 1, wherein the laser ranging module comprises a connecting plate (12) and a box body, the box body is fixed at two ends of the connecting bracket (5) through the connecting plate (12), a laser and a laser ranging sensor (4) are integrated in the box body, an adjusting handle (3) is arranged on the box body, the laser is used for emitting laser beams, the laser ranging sensor (4) is used for measuring the distance emitted by the laser, the adjusting handle (3) is used for adjusting the position of the box body, a positioning groove (8) is arranged on the connecting plate (12), the adjusting handle (3) adjusts the box body to move, the box body and the connecting plate move around the positioning groove, and after a proper position is found, the box body and the connecting plate are fixed through a small hole in the center of the positioning groove.

5. The portable automobile seat continuous hardness tester according to claim 4, wherein the connecting plate (12) is connected with the connecting bracket (5) through a positioning pin (9).

6. The portable automobile seat continuous hardness tester as claimed in claim 5, wherein level indicators (10) are installed on the upper surfaces of both ends of the connecting bracket (5) for applying force to the platen when the visual level indicators are kept horizontal during the test.

7. The portable automobile seat continuous hardness tester according to claim 1, wherein the diameter of the pressure plate (7) is 10-50 mm.

8. A portable automobile seat continuous hardness testing method is characterized by comprising the following steps:

the method comprises the following steps: calibrating the laser ranging module:

starting a laser, debugging the positioning groove repeatedly, measuring the vertical distance a between the edge of a box body of the laser ranging module and the pressure plate connecting rod through the laser ranging sensor, and when the deviation of the value a and the design value is less than 0.3mm, indicating that the laser ranging module is leveled, and calibrating the laser ranging modules at the two sides for later use;

step two; adjusting an adjusting handle on one side to focus a laser beam emitted by a laser on the junction of a pressure plate connecting rod and a pressure plate, and recording the vertical distance x between the horizontal plane of an emitting point of the laser beam and the horizontal plane of the pressure plate;

step three: applying pressure to the seat, keeping the level indicator in a horizontal position, adjusting the adjusting handles on two sides, projecting and focusing the laser beam projection point to a certain point of the seat, and according to the formula y, n.sin [ arccos [ (n) n²+c²-e²)/2nc]]Obtaining a distance y, wherein y is the vertical distance between the plane where the emission point of the laser beam is located and the plane where the seat is located, n is the distance between the emission point of the laser beam on one side and a certain point of the seat, e is the distance between the emission point of the laser beam on the other side and the certain point of the seat, c is the fixed distance between the two box bodies, and the pressure value F at the moment is recorded through the force sensor;

step four: obtaining the compression quantity S of the seat surface or the foam according to the formula S-y-x;

and repeating the third step and the fourth step for multiple times, fitting a curve of the pressure and the compression amount, and calculating the continuous hardness of the automobile seat by the controller of the laser ranging module according to the curve and displaying the continuous hardness of the automobile seat through a display screen.

9. The portable automobile seat continuous hardness testing method according to claim 8, wherein the calculation formula of the continuous hardness of the automobile seat is g ═ F (F)₂-F₁)/(S₂-S₁) Wherein F is₂Is a compression amount S₂A corresponding pressure value; f₁Is a compression amount S₁The corresponding pressure value.

10. The method for testing the continuous hardness of the portable automobile seat as claimed in claim 9, wherein the compression amount is S₁3-5 mm, compression S₂The hardness SH required by the automobile seat in the early driving stage can be calculated when the hardness is 10-15 mm, the hardness PH required by long-term driving can be calculated when S1 is 10-15 mm and S2 is 25-35 mm, the comfort level of the automobile seat can be evaluated by calculating the difference between the hardness PH required by long-term driving and the hardness SH required in the early stage, specifically, the difference between the PH and the SH is more than 8, the comfort level is excellent, the difference between the PH and the SH is 5-8, the comfort level is good, the difference between the PH and the SH is 2-5, the comfort level is general or acceptable, the difference between the PH and the SH is 0-2, the comfort level is poor, the difference between the PH and the SH is less than 0, and the comfort level is completely unacceptable.

Technical Field

The invention belongs to the technical field of surface hardness testing of automobile seats, and particularly relates to a portable automobile seat continuous hardness tester and a testing method.

Background

Most parts on the automobile seat affect the comfort of the seat, but foam plays an important bearing role for an occupant, namely a front-row seat or a rear-row seat, from the beginning of seating to the sitting of the occupant, the deformation process of the seat is compressed by the occupant, and the carrier with the largest deformation is foam, and the deformation amount and the hardness of the foam determine a body pressure distribution result for measuring the combination state of the seat and the occupant and determine the subjective riding perception of the occupant.

In the process of seating an occupant, it is a continuous compression process of the seat foam, and it is important to know the compression performance such as the relationship between the amount of deformation and the compression strength, the compression modulus, the hysteresis rate, and the like in the compression process to design the seat. With the intensive and intelligent development of human engineering research in the driving process, different parts of a human body need different hardness of the seat to meet the requirement of a consumer on the comfort of the seat, and the hardness of the seat or the foam needs to be tested rapidly and continuously at multiple parts so as to meet the requirement of detecting or monitoring the quality of the seat in the present and future.

Most of the existing seat manufacturers mostly adopt large equipment consisting of an indoor force sensor and a displacement sensor which need to be fixed to test the compression performance of the seat or the foam. The detection equipment is expensive, the operation process is complex, the detection equipment resources are limited, the test waiting period is long, and the test site and the application range are limited. Because the test equipment is fixed, the compression process of local hardness in certain region on the test seat all needs to remove the seat, wastes time and energy and operates inconveniently. While not allowing flexible testing of small areas of the seat such as the side wing portions. The biggest defect is that the continuous hardness, namely the softness hardness required in the early driving stage and the strong supporting hardness required in the long driving stage, of the objective evaluation index required by the seat design and subjective perception contrast cannot be directly obtained.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a portable automobile seat continuous hardness tester and a testing method thereof, which aim to solve the problems that the testing place and the application range are limited in the prior art and the like.

The invention is realized by the following technical scheme:

the utility model provides a continuous hardness tester of portable car seat, includes force measuring module, laser rangefinder module, linking bridge 5 and pressure disk connecting rod 6, force measuring module is used for measuring the pressure value of applying to the seat, laser rangefinder module is used for measuring the deformation volume on seat surface, force measuring module's bottom is connected with pressure disk connecting rod 6, and pressure disk connecting rod 6's bottom threaded connection has pressure disk 7, and linking bridge 5 has been put to the cover on pressure disk connecting rod 6, and linking bridge 5's both ends are connected with laser rangefinder module.

Preferably, the force measuring module comprises a signal processor, a controller, a display screen 2 and a force sensor 11, the force sensor 11 and the laser ranging sensor 4 are respectively electrically connected with the signal processor, the display screen 2, the force sensor 11 and the laser ranging sensor 4 are respectively electrically connected with the controller, the force sensor 11 and the laser ranging sensor 4 send collected signals to the signal processor, after the signals are processed by the signal processor, the controller transmits the processed signals to the display screen, and data are displayed on the display screen 2.

Preferably, the top end of the force measuring module is connected with a handle 1, the handle 1 is held by hand to apply pressure, and the pressure is transmitted to the seat or the foam surface through a pressure plate connecting rod 6 and a pressure plate 7 to cause the compression deformation of the seat or the foam surface.

Preferably, the laser rangefinder module includes connecting plate 12 and box, and the box passes through connecting plate 12 to be fixed at the both ends of linking bridge 5, the integration has laser instrument and laser rangefinder sensor 4 in the box, is provided with adjustment handle 3 on the box, the laser instrument is used for the transmission laser beam, and laser rangefinder sensor 4 is used for measuring laser emission's distance, and adjustment handle 3 is used for adjusting the position of box, be provided with constant head tank 8 on connecting plate 12, adjustment handle 3 adjusts the box and removes, and the box removes around the constant head tank with the connecting plate, finds suitable position after, it is fixed through the aperture of constant head tank central authorities.

Preferably, the connection plate 12 is connected to the connection bracket 5 by means of a positioning pin 9.

Preferably, the upper surfaces of the two ends of the connecting bracket 5 are provided with level indicators 10 for applying force to the platen when the visual level indicator is kept horizontal in the test process.

Preferably, the diameter of the platen 7 is 10-50 mm.

A method for testing the continuous hardness of a portable automobile seat specifically comprises the following steps:

the method comprises the following steps: calibrating the laser ranging module:

starting a laser, debugging the positioning groove repeatedly, measuring the vertical distance a between the edge of a box body of the laser ranging module and the pressure plate connecting rod through the laser ranging sensor, and when the deviation of the value a and the design value is less than 0.3mm, indicating that the laser ranging module is leveled, and calibrating the laser ranging modules at the two sides for later use;

step two; adjusting an adjusting handle on one side to focus a laser beam emitted by a laser on the junction of a pressure plate connecting rod and a pressure plate, and recording the vertical distance x between the horizontal plane of an emitting point of the laser beam and the horizontal plane of the pressure plate;

step three: applying pressure to the seat, keeping the level indicator in a horizontal position, adjusting the adjusting handles on two sides, projecting and focusing the laser beam projection point to a certain point of the seat, and according to the formula y, n.sin [ arccos [ (n) n²+c²-e²)/2nc]]Obtaining a distance y, wherein y is the vertical distance between the plane where the emission point of the laser beam is located and the plane where the seat is located, n is the distance between the emission point of the laser beam on one side and a certain point of the seat, e is the distance between the emission point of the laser beam on the other side and the certain point of the seat, c is the fixed distance between the two box bodies, and the pressure value F at the moment is recorded through the force sensor;

step four: obtaining the compression quantity S of the seat surface or the foam according to the formula S-y-x;

and repeating the third step and the fourth step for multiple times, fitting a curve of the pressure and the compression amount, and calculating the continuous hardness of the automobile seat by the controller of the laser ranging module according to the curve and displaying the continuous hardness of the automobile seat through a display screen.

Preferably, the continuous stiffness of the vehicle seat is calculated by the formula g ═ F (F)₂-F₁)/(S₂-S₁) Wherein F is₂Is a compression amount S₂Corresponding toA pressure value; f₁Is a compression amount S₁The corresponding pressure value.

Preferably, when the amount of compression S₁3-5 mm, compression S₂The hardness SH required by the automobile seat in the early driving stage can be calculated when the hardness is 10-15 mm, the hardness PH required by long-term driving can be calculated when S1 is 10-15 mm and S2 is 25-35 mm, the comfort level of the automobile seat can be evaluated by calculating the difference between the hardness PH required by long-term driving and the hardness SH required in the early stage, specifically, the difference between the PH and the SH is more than 8, the comfort level is excellent, the difference between the PH and the SH is 5-8, the comfort level is good, the difference between the PH and the SH is 2-5, the comfort level is general or acceptable, the difference between the PH and the SH is 0-2, the comfort level is poor, the difference between the PH and the SH is less than 0, and the comfort level is completely unacceptable.

Compared with the prior art, the invention has the following advantages:

the portable automobile seat continuous hardness tester and the testing method solve the problems that the testing place and the application range are limited in the prior art and the like. The laser ranging system is adopted to replace the traditional electric/pneumatic rigid body moving ranging system, so that the testing precision and the flexibility of the use occasion are greatly improved.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic structural diagram of a portable automobile seat continuous hardness tester according to the present invention;

FIG. 2 is a partially enlarged view of a portable automobile seat continuous hardness tester according to the present invention;

FIG. 3 is a schematic calibration diagram of a portable automobile seat continuous stiffness test method according to the present invention;

FIG. 4 is a schematic illustration of leveling of a portable automotive seat continuous stiffness test method of the present invention;

FIG. 5 is a schematic view of a portable automobile seat continuous hardness tester of the present invention placed on a seat;

FIG. 6 is a schematic diagram of a portable automobile seat continuous hardness tester according to the present invention;

in the figure: handle 1, display screen 2, adjustment handle 3, laser rangefinder sensor 4, linking bridge 5, pressure disk connecting rod 6, pressure disk 7, constant head tank 8, locating pin 9, level indicator 10, force sensor 11, connecting plate 12.

Detailed Description

For clearly and completely describing the technical scheme and the specific working process thereof, the specific implementation mode of the invention is as follows by combining the attached drawings of the specification:

in the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Example 1

As shown in FIG. 1, this embodiment provides a continuous hardness tester of portable car seat, including force measuring module, laser rangefinder module, linking bridge 5 and pressure disk connecting rod 6, force measuring module is used for measuring the pressure value of applying to the seat, laser rangefinder module is used for measuring the deformation volume on seat surface, force measuring module's bottom is connected with pressure disk connecting rod 6, and pressure disk connecting rod 6's bottom threaded connection has pressure disk 7, and linking bridge 5 has been put to pressure disk connecting rod 6 upper cover, and the both ends of linking bridge 5 are connected with laser rangefinder module.

The force measuring module comprises a signal processor, a controller, a display screen 2 and a force sensor 11, wherein the force sensor 11 and the laser ranging sensor 4 are respectively electrically connected with the signal processor, the display screen 2, the force sensor 11 and the laser ranging sensor 4 are respectively electrically connected with the controller, the force sensor 11 and the laser ranging sensor 4 send collected signals to the signal processor, after the signals are processed by the signal processor, the controller transmits the processed signals to the display screen, and data are displayed on the display screen 2.

The top end of the force measuring module is connected with a handle 1, the handle 1 is held by hand to apply pressure, and the pressure is transmitted to the surface of a seat or foam through a pressure plate connecting rod 6 and a pressure plate 7, so that the seat or foam is compressed and deformed.

As shown in FIG. 2, the structure of the laser ranging module is introduced in detail, the laser ranging module comprises a connecting plate 12 and a box body, the box body is fixed at two ends of a connecting support 5 through the connecting plate 12, a laser and a laser ranging sensor 4 are integrated in the box body, an adjusting handle 3 is arranged on the box body, the laser is used for emitting laser beams, the laser ranging sensor 4 is used for measuring the distance of laser emission, the adjusting handle 3 is used for adjusting the position of the box body, a positioning groove 8 is arranged on the connecting plate 12, the adjusting handle 3 adjusts the box body to move, the box body and the connecting plate move around the positioning groove, and after a proper position is found, the box body and the connecting plate are fixed through a small hole in the center of the positioning groove.

The connecting plate 12 is connected with the connecting bracket 5 through a positioning pin 9.

And the upper surfaces of two ends of the connecting bracket 5 are provided with level indicators 10 for applying force to the pressure plate when the level indicators are kept horizontal during the test process.

The diameter of the pressure plate 7 is 10-50 mm.

The testing principle of the portable automobile seat continuous hardness tester is as follows:

the force measuring principle of the force measuring module is that in the process of holding the handle by hand and applying force, the thumb presses an 'On' test key to simultaneously start the force measuring sensor and the laser distance measuring sensor; the pressing disc enables the surface of the seat to deform in the pressing process, and the two laser ranging sensors are matched with a control algorithm to obtain the corresponding deformation quantity, namely the indentation quantity, of the surface of the seat while the force value is stored on the display screen; in the testing process, the visual level indicator applies force to the pressure plate under the condition of keeping horizontal, a storage display screen in the force measuring system can input item information through a typing key and set the interval between the picked force value and the indentation force value before testing so as to obtain a series of force values and indentation force values or the relationship between the force values and the indentation force values. The laser ranging sensor can control the position through the positioning pin, and then the angle adjusting handle rotates and positions in a range of-60 degrees to eliminate the influence of the side wing or the shape on laser shooting in the testing process. The seat designer can set the picked force values corresponding to the series of indentation amounts according to different positions (such as the positions below the shoulder, the waist and the hip) of the seat of the passenger car or the truck to realize continuous hardness test, wherein the continuous hardness can be the softness of the surface layer of the seat at the moment when a rider sits or the hardness of deep support after the rider sits, or the waist of the rider needs to test a larger indentation amount to investigate the support reliability, and the shoulder needs to be supported at a smaller depth but needs to be supported at a better hardness of the surface layer softness. The laser ranging system is adopted to replace the traditional electric/pneumatic rigid body moving ranging system, so that the testing precision and the flexibility of the use occasion are greatly improved.

Example 2

The embodiment provides a portable automobile seat continuous hardness testing method, which specifically comprises the following steps:

the method comprises the following steps: calibrating the laser ranging module:

starting a laser, debugging the positioning groove repeatedly, measuring the vertical distance a between the edge of a box body of the laser ranging module and the pressure plate connecting rod through the laser ranging sensor, and when the deviation of the value a and the design value is less than 0.3mm, indicating that the laser ranging module is leveled, and calibrating the laser ranging modules at the two sides for later use; after the calibration is finished, the connecting plate and the connecting bracket are fixed through a small hole in the center of the positioning groove;

step two; adjusting an adjusting handle on one side to focus a laser beam emitted by a laser on the junction of a pressure plate connecting rod and a pressure plate, and recording the vertical distance x between the horizontal plane of an emitting point of the laser beam and the horizontal plane of the pressure plate;

step three: applying pressure to the seat, keeping the level indicator in a horizontal position, adjusting the adjusting handles on two sides, projecting and focusing the laser beam projection point to a certain point of the seat, and according to the formula y, n.sin [ arccos [ (n) n²+c²-e²)/2nc]]Obtaining a distance y, wherein y is the vertical distance between the plane where the emission point of the laser beam is located and the plane where the seat is located, n is the distance between the emission point of the laser beam on one side and a certain point of the seat, e is the distance between the emission point of the laser beam on the other side and the certain point of the seat, c is the fixed distance between the two box bodies, and the pressure value F at the moment is recorded through the force sensor;

step four: obtaining the compression quantity S of the seat surface or the foam according to the formula S-y-x;

and repeating the third step and the fourth step for multiple times, fitting a curve of the pressure and the compression amount, and calculating the continuous hardness of the automobile seat by the controller of the laser ranging module according to the curve and displaying the continuous hardness of the automobile seat through a display screen.

The continuous hardness of the vehicle seat is calculated by the formula g ═ F₂-F₁)/(S₂-S₁) Wherein F is₂Is a compression amount S₂A corresponding pressure value; f₁Is a compression amount S₁The corresponding pressure value.

When the compression amount S₁3-5 mm, compression S₂At 10-15 mm, the hardness SH, S required for the automobile seat at the initial driving stage can be calculated₁10-15 mm, when S₂At 25-35 mm, the hardness SH required for long-term driving can be calculated.

From a fitted curve, S₁Is 3mm, S₂15 mm, the hardness SH required by the automobile seat in the initial driving stage is 7.81N/mm displayed by the display screen; if S₁15 mm, S₂35 mm, and the display value is less than 7.81N/mm, a keyboard is required to convert S into S₂If the hardness required for long-term riding is equal to or less than the hardness required in the initial riding period, the calculation is carried out again after 10 mm, which indicates that the seat does not have the hardness required in the initial riding period.

The comfort level of the automobile seat can be evaluated by calculating the difference value between the hardness PH required by long-term driving and the hardness SH required by the automobile seat in the initial stage, specifically, the difference value between the PH and the SH is more than 8, the comfort level is excellent, the difference value between the PH and the SH is between 5 and 8, the comfort level is good, the difference value between the PH and the SH is between 2 and 5, the comfort level is general or acceptable, the difference value between the PH and the SH is between 0 and 2, the comfort level is poor, the difference value between the PH and the SH is less than 0, and the comfort level is completely unacceptable.

Example 3

The difference between the hardness indicated by the long-term requirement for the initial riding and the hardness indicated by the long-term requirement for the initial riding, which is similar to example 2, indicates that the seat has the hardness indicated by the long-term requirement for the initial riding and the hardness indicated by the long-term requirement for the long-term riding.

Example 4

Same as in example 2Similarly, the difference is based on the fitted curve, S₁Is 3mm, S₂10 mm, the display screen shows a softness value of 7.81N/mm if S₁15 mm, S₂And 25 mm, the hardness required for long-term riding is equal to or less than the hardness required in the initial riding, which indicates that the seat does not have the hardness required for strong long-term riding.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.