Method and device for comprehensively evaluating quality of toy building blocks and medium

Abstract

The invention discloses a method and device for comprehensively evaluating the quality of toy building blocks and a medium, and the method comprises the steps: carrying out the insertion and extraction of a target building block combination at the time of the splicing of the target building block combination and after a preset delay time period, and obtaining an insertion and extraction force evaluation result; performing comprehensive performance testing on the target building block to obtain a comprehensive performance evaluation result; and forming a quality evaluation result of the target building block by the insertion and extraction force evaluation result and the comprehensive performance evaluation result. The invention provides a method and device for comprehensively evaluating the quality of toy building blocks and a medium, and relates to the field of consumer goods safety, and an insertion and extraction force evaluation result and a comprehensive performance evaluation result are combined to form a quality evaluation result of a target building block; the comprehensive evaluation mode not only considers the mechanical performance of the building block, but also considers the user experience and the long-term durability, and can solve the problem that it is difficult to comprehensively evaluate the quality of the building block so as to ensure that the building block keeps high quality in the whole life cycle.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of consumer product safety, in particular to a method, device and medium for comprehensively evaluating the quality of toy building blocks. BACKGROUND

[0002] The diversity and combinability of building blocks provide users with unlimited creative space, and it is not only a way of entertainment, but also an important medium for promoting the development of users' intelligence, creativity and social skills. By evaluating the material, structure, safety and other aspects of the building blocks, it can be ensured that the building blocks meet the relevant standards and requirements, and the safety and health of the users are protected. The existing technology mainly focuses on the detection of basic attributes such as appearance, size, material and structural strength when evaluating the performance of building blocks. These detection methods aim to ensure that the appearance of the building blocks is clean and flawless, the size is accurate and error-free, the material is safe and reliable, and the structure is strong and durable, so as to meet the basic use requirements of users.

[0003] However, the existing building block performance evaluation system focuses on the detection mode of basic attributes, ignores the performance evolution law in dynamic use scenarios, and is difficult to comprehensively quantify the influence of aging degradation, environmental coupling and user interaction behavior on quality, resulting in the inability to systematically guarantee the realization of the comprehensive value of building blocks in the fields of education, safety and ecology. SUMMARY

[0004] The present application provides a method, device and medium for comprehensively evaluating the quality of toy building blocks to solve the problem of difficulty in comprehensively evaluating the quality of building blocks and ensuring that the building blocks maintain high quality throughout their life cycle.

[0005] To achieve the above-mentioned purpose, the present application provides a method for comprehensively evaluating the quality of toy building blocks, comprising:

[0006] Respectively after the instant and the preset delay period of the target building block combination splicing is completed, the target building block combination is inserted and pulled out, and the insertion and pulling force evaluation results are obtained; wherein the target building block combination is an insertion and pulling assembly composed of a plurality of target building blocks;

[0007] The target building block is subjected to comprehensive performance testing, and the comprehensive performance evaluation results are obtained; wherein the comprehensive performance testing includes surface property testing, human-computer interaction testing and durability testing;

[0008] The quality evaluation results of the target building block are composed of the insertion and pulling force evaluation results and the comprehensive performance evaluation results.

[0009] The instant plug-in force evaluation is performed after the target building block combination is completed, the connection performance of the building block in the initial state can be captured, which helps to find potential defects in the design or manufacturing process; and the plug-in force evaluation is performed after the preset delay period, which can simulate the performance change of the building block after long-term use or storage, so as to evaluate the durability and stability; the combination of instant and delayed evaluation can more comprehensively reflect the plug-in performance of the building block in the whole life cycle, which helps to find the plug-in performance decline of the building block due to material aging, structure loosening and other factors, so as to early warn potential quality problems. In addition, the comprehensive performance test covers surface property test, human-computer interaction test and durability test and other aspects, which comprehensively considers the comfort, ease of use and long-term stability of the building block in the use process from the user's point of view, and ensures the comprehensiveness and practicality of the building block quality evaluation.

[0010] Compared with the prior art, the plug-in force evaluation result and the comprehensive performance evaluation result are combined to constitute the quality evaluation result of the target building block; this comprehensive evaluation method not only considers the mechanical performance of the building block, but also considers the user experience and long-term durability, so as to more accurately reflect the quality performance of the building block in the whole life cycle, and thus can solve the problem that it is difficult to comprehensively evaluate the quality of the building block, so as to ensure that the building block maintains high quality in the whole life cycle.

[0011] As a preferred scheme, the surface property test includes stain resistance test, the human-computer interaction test includes holding feeling test and contact feeling test, and the durability test includes anti-aging test.

[0012] The preferred scheme comprehensively tests the target building block from the three dimensions of surface property, human-computer interaction and durability, and ensures the completeness of the evaluation. Moreover, specific test items are further subdivided under each test category, forming a test system with clear hierarchy and reasonable structure.

[0013] As a preferred scheme, the holding feeling test specifically includes:

[0014] The density of the target building block is calculated according to the mass of the target building block in the auxiliary solution and the mass of the target building block in the air, and the density is subjected to pass / fail evaluation to obtain a density evaluation result;

[0015] A preset force is applied to the target building block, and a test belt is controlled to roll back and forth at the edge of the target building block, and a cutting proportion is calculated according to the tearing length of the test belt and the length of the test belt contacting the edge of the target building block;

[0016] The cutting proportion is subjected to tearing degree evaluation to obtain a sharp edge evaluation result;

[0017] The holding feeling evaluation result of the target building block is composed of the density evaluation result and the sharp edge evaluation result.

[0018] This preferred solution not only considers the density of the target building block as a physical property, but also evaluates the edge safety through sharp edge detection, thus forming a comprehensive system of holding feeling evaluation. Among them, the density as the basic physical property of the material can reflect the key information such as the material quality and structural compactness of the building block; the qualified evaluation of the density helps to select the building block that meets the specific density requirement, ensuring the quality and consistency of the product. By testing the rolling of the tape on the edge of the building block, the damage caused by traditional cutting test is avoided, and the test cost is reduced. In addition, by evaluating the holding feeling, the comfort and safety of the user when using the building block can be predicted, which helps to improve the user experience of the product.

[0019] As a preferred solution, the contact feeling test specifically includes:

[0020] A normal force is applied to the preset material, and the target building block is moved in cycles at a preset speed group to obtain the maximum acceleration generated during the measurement process;

[0021] The maximum acceleration is evaluated for moving stickiness according to the numerical value, and a stickiness evaluation result is obtained;

[0022] In a preset time period, a test force is used to vertically press a needle into a plurality of test points on the target building block to obtain a plurality of hardness values corresponding to the needle tip extension length;

[0023] The plurality of hardness values are evaluated for hardness interval to obtain a hardness evaluation result;

[0024] The contact feeling evaluation result of the target building block is composed of the cool feeling evaluation result, the stickiness evaluation result and the hardness evaluation result; wherein the cool feeling evaluation result is obtained by parameter evaluation of the surface temperature and thermal diffusivity of the target building block.

[0025] This preferred solution comprehensively evaluates the contact feeling of the target building block from the dimensions of cool feeling, stickiness and hardness, covering the main hand feeling problems that the user may encounter when using the building block; by measuring the surface temperature, the maximum acceleration and the needle tip extension length, the subjective feelings of stickiness and hardness are converted into objective and quantifiable indicators, improving the scientificity and accuracy of the evaluation.

[0026] As a preferred solution, the anti-aging test specifically includes:

[0027] The target building block is placed in a humid heat environment and a hot oxygen environment respectively for anti-aging test, and a first target building block and a second target building block after aging treatment are obtained;

[0028] The first target block and the second target block are subjected to a plug-in force test to obtain anti-aging evaluation results including wet heat plug-in force core mechanical parameters and thermal oxygen plug-in force core mechanical parameters.

[0029] The preferred scheme can truly reflect the aging conditions that the target block may encounter in actual use by simulating a wet heat environment and a thermal oxygen environment, and improves the scientificity and accuracy of the evaluation. Moreover, the wet heat plug-in force and the thermal oxygen plug-in force are extracted through the plug-in force test, which directly relates to the performance of the block in actual use and has clear pertinence.

[0030] As a preferred scheme, the anti-staining test specifically includes:

[0031] The volume of the droplet of the pipette is controlled so that the droplet is dropped on a plurality of test points on the surface of the target block.

[0032] Numerical size evaluation is performed on a plurality of contact angles between the droplet and the surface of the target block to obtain anti-staining evaluation results.

[0033] The preferred scheme selects a plurality of test points on the surface of the target block for droplet testing, which can comprehensively reflect the anti-staining performance of different regions of the block surface and avoid evaluation deviation caused by local differences.

[0034] As a preferred scheme, the target block combination is subjected to insertion and extraction processing after the target block combination is completed at the moment and after a preset delay period to obtain plug-in force evaluation results, specifically including:

[0035] The clamping position of the full-automatic plug-in force testing machine is corrected.

[0036] The target block combination is subjected to insertion and extraction processing by the full-automatic plug-in force testing machine after the target block combination is completed at the moment and after a preset delay period to obtain plug-in force evaluation results including plug-in force core mechanical parameters; wherein the insertion and extraction processing are controlled by upward and downward movement of the lower clamp, and the plug-in force core mechanical parameters include the slope coefficient of the introduction section, the maximum insertion force of the insertion section, and the maximum extraction force of the extraction section.

[0037] The preferred scheme performs plug-in force testing after the target block combination is completed at the moment and after a preset delay period, which can evaluate the mechanical performance changes of the block combination at different time points and is helpful to understand the long-term stability and durability of the block combination. Moreover, the plug-in force is quickly tested by controlling the upward and downward movement of the lower clamp, which shortens the test period and improves the evaluation efficiency.

[0038] As a preferred solution, the clamping position of the full-automatic plug-in force testing machine is corrected, specifically:

[0039] The first target building block combination is fixed on the lower clamp of the full-automatic plug-in force testing machine; wherein the modular plug-in assembly of the first target building block combination is consistent with the corresponding assembly of the target building block in terms of geometric shape and mechanical locking characteristic parameters;

[0040] The displacement of the upper clamp of the full-automatic plug-in force testing machine is controlled, and clamping operation is performed after the upper end of the first target building block combination exceeds the specified number of positioning reference lines;

[0041] The position of the lower clamp is adjusted, secondary positioning and clamping are performed on the lower end of the first target building block combination, and the clamping position is controlled to be between the specified scale numbers.

[0042] The preferred solution can ensure that the clamping position and conditions of the building block combination remain consistent during each test by correcting the clamping position of the full-automatic plug-in force testing machine, thereby improving the accuracy and repeatability of the test. Moreover, the modular plug-in assembly of the first target building block combination is consistent with the corresponding assembly of the target building block in terms of geometric shape and mechanical locking characteristic parameters, ensuring the accuracy and comparability of the test.

[0043] The application also provides a device for comprehensively evaluating the quality of toy building blocks, which comprises a plug-in module, a comprehensive module, and a construction module;

[0044] The plug-in module is used to perform plug-in and pull-out processing on the target building block combination at the moment when the target building block combination is completed and after a predetermined delay period, respectively, to obtain plug-in force evaluation results; wherein the target building block combination is a plug-in assembly composed of a plurality of target building blocks.

[0045] The comprehensive module is used to perform comprehensive performance testing on the target building blocks to obtain comprehensive performance evaluation results; wherein the comprehensive performance testing includes surface characteristic testing, human-computer interaction testing, and durability testing.

[0046] The construction module is used to construct the quality evaluation results of the target building blocks from the plug-in force evaluation results and the comprehensive performance evaluation results.

[0047] The application also provides a storage medium having a computer program stored thereon, wherein the computer program is invoked and executed by a computer to implement the method for comprehensively evaluating the quality of toy building blocks. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 is a flowchart of a method for comprehensively evaluating the quality of toy building blocks provided by an embodiment of the application.

[0049] Figure 2 is a building block display diagram provided by an embodiment of the present application;

[0050] Figure 3 is a building block plug-in schematic diagram provided by an embodiment of the present application;

[0051] Figure 4 is a plug-in force curve display diagram provided by an embodiment of the present application;

[0052] Figure 5 is a contact angle display diagram provided by an embodiment of the present application;

[0053] Figure 6 is a sharp edge detection display diagram provided by an embodiment of the present application;

[0054] Figure 7 is a structural schematic diagram of a device for comprehensively evaluating toy building block quality provided by an embodiment of the present application. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0056] In the description of the present application, it should be understood that the terms “first”, “second” and “third” are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first”, “second” and “third” can be explicitly or implicitly included one or more of the features. In the description of the present application, unless otherwise specified, the meaning of “several” is two or more.

[0057] The method for comprehensively evaluating toy building block quality provided by the embodiments of the present application is mainly applied to building a comprehensive evaluation framework for building block quality evaluation by relying on systematic testing means, aiming to realize long-term and comprehensive performance evaluation and ensure the reliability of building block quality.

[0058] Embodiment one:

[0059] Please refer to Figure 1 The embodiments of the present application provide a method for comprehensively evaluating toy building block quality, including S1-S3, and the specific implementation steps are as follows:

[0060] S1, respectively, at the target building block combination splicing completed instant and after the preset delay period, the target building block combination is inserted and pulled out, and the plug-in force evaluation result is obtained; wherein the target building block combination is a plug-in assembly composed of several target building blocks.

[0061] The embodiment of the application step S1 includes S1.1-S1.2, specifically:

[0062] S1.1, in the preset value stage, the lower part of the first target building block combination is clamped and fixed on the lower clamp of the full-automatic plug-in force testing machine; wherein the modular plug-in assembly of the first target building block combination is consistent with the corresponding assembly of the target building block in geometric shape and mechanical locking characteristic parameters; and the first target building block combination and the target building block combination are both plug-in assemblies of two 2x4 standard target building blocks, "2x4 standard target building block" refers to the length and width of the standard building block corresponding to two and four basic building block unit size respectively;

[0063] When the lower clamp is clamped, the building block extends upward, and the top end (upper part) penetrates the reference surface of the lower clamp and extends to the upper clamp area above the reference surface. Wherein, the reference surface refers to the plane that the upper and lower clamps can contact each other in the full-automatic plug-in force testing machine; wherein the scale line of the upper clamp is marked upward from the reference surface, and the scale line of the lower clamp is marked downward from the reference surface;

[0064] Control the upper clamp of the full-automatic plug-in force testing machine to move upward (away from the reference surface of the lower clamp), when the upper part of the building block (which has penetrated the reference surface of the upper clamp) continues to extend upward, stop when it exceeds the scale line of the upper clamp by 1-2 grids. For example, the reference surface is 0 grid, 1 grid is 10mm, 2 grid is 20mm, "exceeding 1-2 grids" means that the top end of the upper part of the building block exceeds the reference surface of the upper clamp by 10-20mm, and completely enters the clamping range of the upper clamp, ensuring that it can be firmly fixed during subsequent clamping.

[0065] Clamp the upper clamp (at this time the position of the upper clamp is fixed, and the upper part of the building block is locked), loosen the lower clamp and move it downward (away from the reference surface of the upper clamp), and then clamp the lower part of the building block again, at this time the clamping position of the lower part needs to correspond to "1-2 grids downward from the reference surface of the lower clamp"; after adjustment, clamp the building block to ensure that the clamping force of the upper clamp and the lower clamp does not affect the plug-in force of the building block, thereby completing the clamping preparation operation.

[0066] The file name and movement parameters are set by computer software, and the main test is the full range of force during insertion and extraction. The displacement or stroke length involved in the insertion or extraction action can be controlled to 1.1 mm. The stroke is designed to be 1.1 mm, which can fully cover most of the stroke from initial contact to complete contact, ensure the integrity of the test data, and effectively avoid plastic deformation of the building blocks caused by excessive extrusion, which can interfere with the test results. Based on the above factors, the stroke is set to 1.1 mm. At the same time, this value can be flexibly adjusted within the range of 1.0-1.2 mm according to actual test requirements to achieve the best test contact effect.

[0067] Before the insertion and extraction force test, the clamp is adjusted to move down 2 mm to ensure that the building blocks are completely separated, and then the parameters of the full-automatic insertion and extraction force testing machine are zeroed.

[0068] To apply the embodiments of the present application, please refer to Figures 2-3 , Figure 2 is a building block display diagram provided by the embodiments of the present application, which presents a standard target building block of 2x4 specification;

[0069] Figure 3 is a building block insertion and extraction schematic diagram provided by the embodiments of the present application, which presents the clamping condition of the target building block combination when the full-automatic insertion and extraction force testing machine completes the clamping preparation operation through its clamp.

[0070] The S1.1 embodiment of the present application can ensure that the clamping position and condition of the building block combination remain consistent during each test by correcting the clamping position of the full-automatic insertion and extraction force testing machine, thereby improving the accuracy and repeatability of the test. Moreover, the modular plug-in assembly of the first target building block combination is consistent with the corresponding assembly of the target building block in terms of geometric form and mechanical locking characteristic parameters, ensuring the accuracy and comparability of the test.

[0071] S1.2, in the actual test stage, two target building blocks are tightly spliced together, and after the target building block combination is completed, the target building block combination is inserted and pulled out according to the above steps at the instant and the preset delay period, specifically: for the target building block combination that has been spliced, first complete the clamping preparation operation on the full-automatic insertion and pulling force test machine, and ensure that the building blocks are completely separated; during the test, the upper clamp of the full-automatic insertion and pulling force test machine fixes the upper part of the target building block combination, the lower clamp first drives the lower part of the target building block combination to move upwards and insert into the upper part of the target building block combination, completes the insertion operation and synchronously acquires the data of the lead-in section and the insertion section; then the lower part is driven to move downwards to perform the pulling-out operation, and the data of the pulling-out section is synchronously acquired, so as to completely simulate the entire insertion and pulling process; the test is repeated for 5 times, the curves of the resistance values generated in the insertion and pulling process with the change of the insertion displacement are recorded by the sensor, and the insertion and pulling force curves are obtained; wherein the insertion and pulling process is controlled by the downward movement and upward movement of the lower clamp; the preset delay period is three days after the target building block combination is spliced and stationary, and the test conditions of the previous and subsequent times are consistent;

[0072] The insertion and pulling force curves are analyzed, the lead-in section, the insertion section and the pulling-out section of the building block material initial insertion and pulling force curve and the lead-in section, the insertion section and the pulling-out section of the insertion and pulling force curve after splicing for three days are counted respectively, the changes of the building block insertion and pulling force sections are calculated, and the insertion and pulling force core mechanical parameters including the slope coefficient of the lead-in section, the maximum insertion force of the insertion section and the maximum pulling-out force of the pulling-out section are obtained;

[0073] The insertion and pulling force core mechanical parameters are evaluated according to the short-term evaluation standard and the long-term evaluation standard, and the insertion and pulling force evaluation results including the scores of the lead-in section, the insertion section and the pulling-out section are obtained.

[0074] The lead-in section refers to the process that the user aligns and initially contacts the front chamfer until the insertion begins when splicing the building blocks. A suitable lead-in section force value slope can help the user quickly locate and obtain the immediate feedback of splicing. If the lead-in section force value is too large, it will increase the difficulty of insertion; on the contrary, if the force value is too small, it may not effectively transmit the tactile signal of "alignment";

[0075] The insertion section is followed by the lead-in section, which is the process that the user continuously applies force to completely insert the building blocks. Proper insertion force can ensure that the user enjoys a smooth insertion experience. Too large insertion force may cause insertion resistance or hand fatigue; and too small force value may affect the stability of splicing, thereby weakening the durability of the finished product;

[0076] The pulling-out section is the process of pulling out the building block from the assembled state by the user when disassembling the building block. A suitable pulling-out force can provide a smooth pulling-out experience for the user. Too large pulling-out force can cause difficulty in pulling out or cause hand discomfort; too small force value can mean that the assembly is not firm enough, thereby affecting the overall durability of the finished product.

[0077] In the formula, the short-term evaluation criteria and the long-term evaluation criteria for parameter evaluation of the core mechanical parameters of the plug-pull force are defined according to the division of the plug-pull force value by different toy manufacturers and the feedback of the plug-pull process by customers.

[0078] Table 1: Short-term evaluation criteria evaluation table

[0079]

[0080]

[0081] As shown in Table 1, the table is a short-term evaluation criteria evaluation table, which shows the specific evaluation details of the short-term evaluation criteria, including evaluation content, evaluation criteria, evaluation grade and result.

[0082] Table 2: Long-term evaluation criteria evaluation table

[0083]

[0084]

[0085] As shown in Table 2, the table is a long-term evaluation criteria evaluation table, which shows the specific evaluation details of the long-term evaluation criteria, including evaluation content, evaluation criteria, evaluation grade and result. It should be noted that in this embodiment, since the two target building blocks are in a simulated long-term static state after assembly, the plug-pull structure between the building blocks will undergo slight irreversible deformation under continuous stress, which is manifested as the plug-pull interface being gradually opened due to long-term stress support. This change in structure directly leads to a decrease in resistance during plug-pull, i.e., a decrease in plug-pull force. In contrast, if the building blocks are in a non-assembled independent storage state and are left for a long time, the size of the building blocks will shrink due to environmental stress release or changes in physical properties, and the originally matched plug-pull gap will decrease, making the building block interface more compact. This increase in structural compactness significantly increases the friction and engagement resistance during plug-pull, thereby causing the plug-pull force to increase.

[0086] It should be noted that the test method of this embodiment S1 is a plug-pull force test by a plug-pull force sensor test instrument, including short-term plug-pull test and long-term plug-pull test.

[0087] Short-term insertion and extraction test refers to the initial state material that has not been affected by use, aging or environmental factors. The original insertion and extraction force characteristics of the material are quantified through standardized mechanical testing methods to verify whether the initial performance of the material meets the design standards. This test result can provide researchers with initial performance data of the material. The test principle is as follows: the insertion and extraction force test is achieved by splicing two 2x4 standard blocks together and clamping the two blocks by the clamp of the full-automatic insertion and extraction force testing machine. The upper clamp position remains fixed, and the lower clamp moves up and down through the precise control of the machine to achieve smooth insertion and extraction of the blocks. In the test process, a high-precision sensor captures and records the detailed curve of the resistance value changing with the insertion displacement in the insertion and extraction process in real time. As the resistance gradually increases, the insertion and extraction force required by the clamp also increases, and the force value data recorded by the sensor also rises accordingly.

[0088] Long-term insertion and extraction force test refers to the material that has been affected by a certain period of use simulation (such as multiple insertion and extraction cycles, static storage) or environmental factors. The change rule of the insertion and extraction force characteristics of the material is quantified through standardized mechanical testing methods to verify whether the performance retention ability of the material in the long-term use scenario meets the design standards. The test aims to evaluate the performance of the blocks after multiple uses and ensure the stability and good user experience of the blocks in long-term use. The test principle is as follows: the 2x4 standard blocks are spliced together and left for three days to simulate the long-term use scenario after the blocks are spliced. By comparing the change of the insertion and extraction force curve before and after the blocks are spliced and left for three days, the long-term insertion and extraction force performance of the blocks is evaluated.

[0089] In addition, in the insertion and extraction force test, two standard blocks are tightly spliced to establish a unified and stable initial benchmark for subsequent tests, ensuring accurate, repeatable and comparable results. The same mold block size and structure are more consistent, and tight splicing can make the protrusions and grooves completely fit, confirm the design fit state, eliminate false fit caused by size deviation, structural defects or misalignment, and avoid abnormal force values in subsequent tests. According to the process, the blocks need to be completely separated after splicing before starting the test; the tight splicing and separation can ensure that the separation state is based on the loosening after complete fitting, rather than random placement, ensuring that the initial separation position and posture of each test are consistent, accurately capturing the force value change from separation to insertion, and improving the reference value of the insertion and extraction force curve data.

[0090] For application of the embodiments of the present application, please refer to Figure 4 , Figure 4 is the insertion and extraction force curve display diagram provided by the embodiments of the present application, which represents the curve of the resistance value changing with the insertion displacement in the insertion and extraction process recorded by the sensor, and is divided into three parts: the introduction section, the insertion section and the extraction section.

[0091] The plug-in force test of this embodiment S1.2 is carried out after the instant and preset delay period of the completion of the block combination assembly, which can evaluate the mechanical property change of the block combination at different time points, and help understand the long-term stability and durability of the block combination. Moreover, by controlling the upward and downward movement of the lower clamp, the plug-in force test is quickly realized, the test period is shortened, and the evaluation efficiency is improved;

[0092] Moreover, the plug-in assembly of the block is one of the most important functions of the block toy, and good plug-in experience directly affects the recognition of customers to the product. By measuring the plug-in force, the plug-in feel of the block can be quantitatively described, and the plug-in performance difference of different materials in the block application can be reflected. By analyzing these data, the performance of different materials in the plug-in feel can be intuitively displayed.

[0093] S2, comprehensive performance test is carried out on the target block to obtain comprehensive performance evaluation results; wherein the comprehensive performance test includes surface property test, human-computer interaction test and durability test.

[0094] The embodiment of the present application is specifically as follows:

[0095] The comprehensive performance test is carried out on the target block to obtain comprehensive performance evaluation results;

[0096] The comprehensive performance test includes surface property test, human-computer interaction test and durability test; the surface property test includes surface gloss test and stain resistance test, the human-computer interaction test includes holding feeling test and contact feeling test, and the durability test includes anti-aging test. The following will make specific description on various test methods.

[0097] ①The surface gloss test includes gloss test and surface roughness test;

[0098] 1) Gloss test:

[0099] Preparation stage: In order to ensure the accuracy and reliability of the test, a sample made of target block is prepared in advance, which can be in the form of color plate or square plate. Before testing, the gloss tester is calibrated to ensure the accuracy of the measurement results. Then, the sample to be tested is properly placed on the test table of the gloss tester, ensuring that the sample surface is clean and flawless, avoiding the influence of stains and scratches on the test results.

[0100] Test execution: after turning on the power of the gloss tester, select the 60-degree geometric reflection test mode (if the device does not have a specific mode, select the gloss measurement value corresponding to 60 degrees), accurately align the test head of the gloss tester with the sample surface, and start the test button.

[0101] Measurement and analysis: after the test is completed, the test results are recorded, so as to obtain the gloss of the target block;

[0102] Determination result: The glossiness of the target building block is evaluated according to the glossiness standard, and the glossiness evaluation result is obtained.

[0103] Table 3 Glossiness standard evaluation table

[0104]

[0105] As shown in Table 3, which is a glossiness standard evaluation table, the specific evaluation details of the glossiness standard are shown, including evaluation content, evaluation standard, evaluation grade and result.

[0106] It should be noted that gloss is a characteristic of the surface of an object, and the commonly referred to surface gloss of an object refers to its ability to reflect light. This is a relative measurement of the ability of an object to reflect light under specified geometric conditions;

[0107] The test principle of the glossiness test in this embodiment is as follows: Glossiness is usually detected by a gloss meter, which includes an incident light emitter, a receiver and a standard plate and other core components. The gloss meter takes ideal polished black glass with a refractive index of 1.567 as a reference, and defines its specular reflection glossiness as 100.0 gloss units. Under the same test conditions, the instrument calculates the relative glossiness value of the object surface by comparing the light flux reflected by the object surface and the standard plate. This value actually reflects the ratio of the reflection ability of the object surface to the reflectivity of the standard surface, and its calculation formula is G = 100Rsample / Rstandard (where G represents glossiness, and Rsample and Rstandard represent the light reflectivity of the object surface and the standard plate surface, respectively). The result is expressed in gloss units (GU).

[0108] 2) Surface roughness test:

[0109] Preparation stage: Prepare a suitable test device such as a 3D profilometer or a laser microscope, and ensure that the test device has been calibrated to an accurate state; prepare the target building block, and ensure that the surface of the target building block is clean and free of stains; place the target building block on the test table of the 3D profilometer or the laser microscope, and ensure that the target building block is fixed and stable; according to the test requirements, set appropriate sampling length, measurement range and other parameters.

[0110] Test execution: Start the test device and begin measuring the surface roughness of the target building block.

[0111] Measurement and analysis: After the test is completed, record the surface profile data and other key parameters, and calculate the roughness (i.e. arithmetic mean roughness Ra) of the target building block according to the measured data. The arithmetic mean roughness Ra is obtained by calculating the arithmetic mean of the distances (i.e. deviations) of each point on the profile line to the profile center line within a certain sampling length.

[0112] Determination result: according to the surface roughness evaluation standard, the roughness is evaluated by parameters, and the surface roughness evaluation result is obtained;

[0113] The surface gloss evaluation result of the target building block is composed of the gloss evaluation result and the surface roughness evaluation result.

[0114] Table 4 Surface roughness evaluation standard evaluation table

[0115]

[0116]

[0117] As shown in Table 4, which is a surface roughness evaluation standard evaluation table, the specific evaluation details of the surface roughness evaluation standard are shown, including evaluation content, evaluation standard, evaluation grade and result.

[0118] It should be noted that the surface roughness test is mainly used to evaluate the flatness, smoothness and machining precision of the surface of the material, to provide an important basis for product quality control and to ensure that the product meets the design requirements. By measuring the roughness of the surface of the building block, it can be determined whether there are burrs or defects, so as to ensure the texture and hand feeling of the building block;

[0119] The test principle of the surface roughness test in this embodiment is that the surface roughness is an index for measuring the degree of small unevenness of the surface, and the smaller the value is, the smoother the surface is. The sampling length is used as the reference line segment for evaluating the surface roughness characteristics. The rougher the surface is, the longer the sampling length required is, and at least 5 profile peaks and valleys should be contained in the length. The arithmetic average roughness Ra is a commonly used parameter for evaluating the surface roughness, which represents the arithmetic mean of the absolute values of the profile peaks and valleys in the sampling length. By taking the reference length along the average line direction of the rough curve as the X axis, the longitudinal magnification ratio as the Y axis, and expressing the curve as y=f(x) function, the result calculated by using a specific formula is the arithmetic average roughness Ra, and its unit is usually microns.

[0120] In this embodiment, the surface quality is one of the important factors affecting the durability and reliability of the building block. A smooth and wear-resistant surface can resist scratches and wear, and maintain the integrity and aesthetics of the building block. A rough or easily worn surface may accelerate the aging and damage of the building block, so through the surface gloss test, the service life and reliability of the building block can be improved.

[0121] ② The stain resistance test includes water contact angle test and surface antistatic test.

[0122] 1) Water contact angle test:

[0123] Preparation stage: Place the cleaned target block on the test platform, use a precision pipette to draw the liquid to be tested, and use the computer program to accurately control the drop amount of the pipette to ensure that the droplet forms a standard pear shape.

[0124] Perform the test: Drop the droplet on several test points on the surface of the target block, use the camera of the contact angle measuring instrument to capture the image of the droplet on the solid surface, ensure that the image is clear and complete, and select five test points for calculation to ensure the accuracy of the measurement results.

[0125] Measurement and analysis: Use the image processing system of the contact angle measuring instrument to process the captured image, measure the contact angle between the droplet and the surface of the target block, and obtain several contact angles.

[0126] Determine the result: Calculate the average value of the several contact angles, evaluate the average value according to the water contact angle standard, and obtain the water contact angle evaluation result.

[0127] Table 5 Water contact angle standard evaluation table

[0128]

[0129] As shown in Table 5, the table is a water contact angle standard evaluation table, which shows the specific evaluation details of the water contact angle standard, including evaluation content, evaluation standard, evaluation grade and result.

[0130] It should be noted that the contact angle is the geometric angle of the droplet formed on the solid surface, especially at the gas-liquid-solid three-phase junction, the angle between the gas-liquid interface tangent and the solid-liquid intersection line. This angle is an important parameter for measuring the wettability of the liquid to the solid surface. The contact angle reflects the interaction strength between the liquid and the solid, thereby helping to understand the diffusion, penetration and other behaviors of the liquid on the solid surface.

[0131] The test principle of the water contact angle test in this embodiment is: the measurement of the contact angle involves three key elements: the profile of the droplet, the measurement baseline as a reference (i.e. the horizontal line of the solid surface, on which the droplet is placed), and the tangent slope at the intersection point of the droplet edge and the baseline. The contact angle specifically refers to the angle formed by the intersection of the droplet edge and the measurement baseline. When the solid surface is completely wetted by the liquid, the contact angle is 0°. If the contact angle is between 0° and 90°, it indicates that the solid surface has wettability and strong hydrophilic performance. When the contact angle exceeds 90°, it means that the solid surface is not easy to be wetted and exhibits strong hydrophobicity. The larger the value of the contact angle, the stronger the hydrophobicity.

[0132] For the application of the embodiments of the present application, please refer to Figure 5 , Figure 5is a contact angle display diagram provided by the embodiment of the application, which shows the wetting condition of the solid surface by the liquid under different contact angles θ.

[0133] 2) Surface antistatic test:

[0134] Preparation stage: Place the target block between the test electrodes of the volume surface resistivity tester, ensuring good contact.

[0135] Test execution: Start the volume surface resistivity tester and begin measuring the surface resistance of the target block.

[0136] Measurement and analysis: Record the test data and obtain the surface resistance value of the target block.

[0137] Determination result: Perform parameter evaluation on the surface resistance value of the target block according to the surface antistatic standard, and obtain the surface antistatic evaluation result.

[0138] The anti-staining evaluation result of the target block is composed of the water contact angle evaluation result and the surface antistatic evaluation result.

[0139] Among them, the target block uses ABS material as the main building block material, and the body resistance is generally about 10 12 Ω, which is classified as a basic antistatic level. In order to further improve the anti-static performance and upgrade the anti-static level, conductive agents can be added to reduce the resistivity, thereby achieving effective anti-static effect. Wherein "ABS material" refers to Acrylonitrile Butadiene Styrene (ABS) copolymer material.

[0140] Table 6 Surface antistatic standard evaluation table

[0141]

[0142] As shown in Table 6, the table is a surface antistatic standard evaluation table, which shows the specific evaluation details of the surface antistatic standard, including evaluation content, evaluation standard, evaluation level and result.

[0143] It should be noted that the antistatic level is mainly based on the surface resistance value, which is divided into basic antistatic level, antistatic level and conductive static level. The smaller the surface resistance, the stronger the antistatic performance. The surface resistance of the basic antistatic level is between 10 9 ~ 10 12 Ω, the surface resistance of the antistatic level is between 10 6 ~ 10 9 Ω, and the surface resistance of the conductive static level is between 10 4 ~ 10 6 Ω ohm.

[0144] The embodiment selects several test points on the surface of the target building block for droplet testing, which can comprehensively reflect the anti-stain performance of different areas of the building block surface, and avoid evaluation deviation caused by local differences;

[0145] In addition, the building block may be contaminated by liquid pollutants during use due to hand sweat or misoperation. At the same time, due to electrostatic effect, the building block surface may adsorb some dust, affecting the use feeling. Therefore, the contact angle and anti-static performance of the building block surface are measured to characterize the surface characteristics and judge the anti-stain performance of the building block.

[0146] ③Grip feeling test includes density test and sharp edge detection.

[0147] 1) Density test:

[0148] Preparation stage: confirm the target building block to be tested, ensure that its mass is above 1g to meet the measurement requirements; prepare the density tester and the auxiliary liquid with known density, ensure that the density tester is in normal working condition; check whether the auxiliary liquid is clean and free of impurities to avoid interference with the measurement results; use the density tester to weigh the mass of the target building block in air, and record it as A.

[0149] Test execution: place the target building block in the auxiliary liquid, ensure that the target building block is completely immersed and no bubbles are generated; use the density tester to weigh the mass of the target building block in the auxiliary liquid, and record it as B.

[0150] Measurement and analysis: based on the density of the auxiliary liquid ρ0, the density of air ρ L , the mass of the target building block in air A and the mass of the target building block in the auxiliary liquid B, calculate the density of the target building block according to the preset formula; due to the existence of system error, 3-5 times of repeated measurement calculation should be performed for each target building block, and the average value of the density is taken as the final result to improve the accuracy of the measurement;

[0151] Determination result: perform qualification evaluation on the density according to the density standard, and obtain the density evaluation result.

[0152] The preset formula is:

[0153]

[0154] Wherein, ρ is the density of the sample to be tested, A is the mass of the sample in air, B is the mass of the sample in the auxiliary liquid, ρ0 is the density of the auxiliary liquid, and ρ L is the density of air.

[0155] Table 7 Density standard evaluation table

[0156]

[0157] As shown in Table 7, which is a density standard evaluation table, the specific evaluation details of the density standard are shown, including evaluation content, evaluation standard, evaluation grade and result.

[0158] It should be noted that the density of the building block toy directly affects the texture of the grip. If the density is too small, the toy feels light, which appears cheap; and if the density is too heavy, it will increase the burden on the hands and reduce the user experience. Therefore, it is necessary to ensure that the building block material has a proper density value;

[0159] The test principle of the density test of the present embodiment is: according to Archimedes' principle, the buoyancy method is used to measure the density of solid. The principle points out that a part or all of the object immersed in the fluid will be subjected to an upward buoyancy, and the size is equal to the weight of the fluid displaced by the object. According to this, the weight of the solid is first measured in the air, and then weighed again in the auxiliary liquid with known density. Using the density formula, the density p of the solid can be accurately calculated.

[0160] 2) Sharp edge detection:

[0161] Preparation stage: select UL sharp edge tester as the detection tool. Prepare three layers of self-adhesive test tape, which is used to simulate human finger skin; refer to the UL sharp edge test method, adjust the tester to the appropriate test state. Pre-set a load of 6N at the edge of the target building block to simulate human hand force. The three layers of self-adhesive test tape are attached to the edge of the target building block to be tested.

[0162] Execute test: apply the pre-set 6N load at the edge of the building block, then control the test tape to roll back and forth along the detection edge, ensuring that the total rolling distance is 101mm.

[0163] Measurement and analysis: after the test is completed, carefully check the degree of cutting of the test tape after rolling. Measure the length of the self-adhesive test tape that is completely cut, including any intermittent cutting parts. Calculate the percentage of the length of the cut self-adhesive test tape to the total length of the self-adhesive test tape in contact with the edge to obtain the cutting percentage.

[0164] Determination result: according to the sharp edge standard, the cutting percentage is evaluated for the degree of cutting to obtain the sharp edge evaluation result; wherein if more than 50% of the self-adhesive test tape is completely cut, the edge of the building block is considered as a sharp edge, which does not meet the safety standard. If it is not more than 50%, further evaluation or recording of the result is carried out according to the specific standard or requirement.

[0165] The grip feeling evaluation result of the target building block is composed of the density evaluation result and the sharp edge evaluation result.

[0166] Table 8 Sharp Edge Standard Evaluation Table

[0167]

[0168] As shown in Table 8, which is a sharp edge standard evaluation table, the specific evaluation details of the sharp edge standard are shown, including evaluation content, evaluation standard, evaluation grade and result.

[0169] For the application of the embodiments of the present application, please refer to Figure 6 , Figure 6 is a sharp edge detection display diagram provided by the embodiments of the present application, the first part shows a UL sharp edge tester, the second part shows a TC-3 test head, and the third part shows the trajectory of the hand that may be scratched by the sharp edge of the building block.

[0170] It should be noted that when customers (mainly children) use building toys, they may touch the edges of the building blocks during assembly. If the edges of the building blocks are too sharp, it may cause accidental injuries such as scratches or stings, especially for children, whose skin is more delicate and is easily damaged by sharp objects. The standards of various regions (such as EN 71, GB 6675, etc.) all stipulate that the edges of toys should not have sharp parts. Through sharp edge detection, it can be ensured that the product meets the requirements of these regulations and avoids legal risks or market recalls due to safety problems.

[0171] The embodiments not only consider the density of the target building block as a physical property, but also evaluate the edge safety through sharp edge detection, thereby forming a comprehensive system for grip feeling evaluation. Among them, density as a basic physical property of material can reflect the key information such as the material quality and structural compactness of the building block; the qualified evaluation of density helps to select building blocks that meet the specific density requirements, ensuring the quality and consistency of the product. By testing the sharp edge through the way of rolling the tape on the edge of the building block, the damage caused by traditional cutting test is avoided, and the test cost is reduced. In addition, by evaluating the grip feeling, the comfort and safety of users when using the building block can be predicted, which helps to improve the user experience of the product;

[0172] Moreover, grip feeling is the comprehensive tactile experience generated when the user's palm contacts the object. Building blocks can significantly enhance the overall texture of the product by virtue of their moderate size, just-right weight, balanced density, and delicate edge touch, etc., thereby providing users with a more outstanding user experience.

[0173] (4) Contact feeling test includes warm and cool feeling test, sticky feeling test and hardness test.

[0174] 1) Warm and cool feeling test:

[0175] Preparation phase: Ensure that the target block shape and size strictly match the technical specifications of the laser flash method test, which is based on the standard GB / T 22588. Place the target block in a sample chamber containing a protective atmosphere to protect the sample from external interference. Set test parameters such as laser intensity, pulse time, etc.

[0176] Perform test: Based on the laser flash method, use a laser flash heat conduction instrument to irradiate the target block with a high-intensity laser pulse for a short time. After the target block surface absorbs the pulse energy, heat propagates to the interior, causing the target block back surface temperature to rise. Record the target block back surface temperature change over time using a temperature gun.

[0177] Measurement and analysis: Collect test data, including laser pulse energy, block back surface temperature change over time, etc. According to the data processing method, calculate the thermal diffusivity of the material; among them, the thermal diffusivity is calculated according to the collected laser pulse energy and the block back surface temperature change over time, using the thermal diffusivity calculation formula (usually based on one-dimensional heat conduction model and laser flash method principle), according to the data processing method (including temperature peak identification, half-width time calculation, etc. Steps) to calculate.

[0178] Determination result: According to the block surface temperature standard, the surface temperature and thermal diffusivity of the target block are evaluated, and the cool feeling evaluation result is obtained.

[0179] Table 9 Block surface temperature standard evaluation table

[0180]

[0181]

[0182] As shown in Table 9, the table is a block surface temperature standard evaluation table, which shows the specific evaluation details of the block surface temperature standard, including evaluation content, evaluation standard, evaluation grade and result.

[0183] Table 10 Thermal diffusivity standard evaluation table

[0184]

[0185] As shown in Table 10, the table is a thermal diffusivity standard evaluation table, which shows the specific evaluation details of the thermal diffusivity standard, including evaluation content, evaluation standard, evaluation grade and result.

[0186] It should be noted that the warm and cool feeling is a subjective tactile sensation produced by the human skin after contacting an object. The warm and cool feeling of the building block toy is mainly related to the thermal conductivity coefficient of the material. If the building block touch is too cold, especially in cold environments, children's hands will feel uncomfortable when they touch it, which may reduce the desire to play. On the contrary, if the building block touch is warm, it may bring a comfortable touch in a suitable environment and stimulate stronger interest in playing. The warm and cool feeling also affects the grip. When the building block touch is cool, the hand muscles may involuntarily contract, and the gripping force may change, thereby affecting the stability during the building process; and appropriate warm feeling may make the hand muscles more relaxed, which is helpful for better gripping and operating the building block;

[0187] The test principle of the warm and cool feeling test of the present embodiment is: the evaluation of the warm and cool feeling covers two aspects of surface temperature and thermal conductivity performance, respectively simulating the use experience of the building block when it is first contacted and continuously contacted. The measurement of the surface temperature can be completed by means of a precise temperature gun. As for the test of the thermal conductivity performance, an advanced laser flash method is adopted. According to the theoretical model of sheet-shaped thermal insulation material, the sample to be tested is placed in a sample chamber filled with protective gas. A high-intensity laser pulse is used to irradiate the sample, so that the sample surface layer rapidly absorbs energy, and the heat is conducted to the interior, causing the temperature of the back surface of the sample to rise. After a series of precise data processing procedures, the thermal diffusivity and thermal conductivity coefficient of the material can be finally obtained, which provides a scientific basis for the quantitative evaluation of the warm and cool feeling.

[0188] 2) Stickiness test:

[0189] Preparation stage: Fix the target block and the imitation skin leather material on the A-end and B-end clamps of the stick-slip tester respectively through strong double-sided adhesive, where the A-end clamp fixes the target block and the B-end clamp fixes the imitation skin leather material. The fixing process needs to ensure that the target block is firmly attached without shaking and the imitation skin leather material is tightly fixed on the corresponding test structure to ensure smooth and uniform movement of the moving parts during testing. During testing, the B-end of the stick-slip tester pasted with the imitation skin leather material remains stationary, and the A-end pasted with the target block moves at a set speed. This accurately simulates the real scenario of the human hand playing with the block when the block surface is in contact with the block. During the relative sliding of the two, the contact interface often appears to be stuck due to the combined action of the material surface characteristics and friction, accompanied by a creaking or crunching sound. These perceptible phenomena are important indicators for humans to judge the stickiness of different materials. Based on this, the acceleration-time signal generated when the sticking occurs can effectively represent the moving stickiness of the material. At the same time, according to the test standard, the imitation skin leather material is set to act on the target block with a normal force of 6N, and the moving speed of the target block is set to 0.5mm / s (simulating slow finger movement) and 6mm / s (simulating fast finger movement) respectively. The test cycle is set to three cycles to ensure the stability and reliability of the test results.

[0190] Test execution: Start the stick-slip tester and begin testing. Control the leather to move on the block sample at the set speed and normal force. During testing, the tester will monitor and record the acceleration data generated during the sticking process in real time.

[0191] Measurement and analysis: After testing is complete, export the acceleration data from the tester. Find the maximum acceleration value generated during testing, which will be used to represent the stickiness of the material.

[0192] Determination of results: According to the slow-moving evaluation standard and the fast-moving evaluation standard, respectively evaluate the maximum acceleration generated during slow-moving and fast-moving to obtain the stickiness evaluation results. The scoring standards for slow-moving and fast-moving are the same, each accounting for fifty points, and the sum of the two is the total score of the stickiness evaluation results.

[0193] Table 11 Slow-moving evaluation standard evaluation table

[0194]

[0195] As shown in Table 11, the table is a slow-moving evaluation standard evaluation table, which shows the specific evaluation details of the slow-moving evaluation standard, including evaluation content, evaluation standard, evaluation level and results.

[0196] Table 12 Fast-moving evaluation standard evaluation table

[0197]

[0198] As shown in Table 12, which is a fast-moving evaluation standard evaluation table, the specific evaluation details of the fast-moving evaluation standard are shown, including evaluation content, evaluation standard, evaluation grade and result.

[0199] It should be noted that the sticky feeling (or "stickiness") of the plastic material refers to a viscous or greasy feeling of the material surface during contact or friction. This feeling is usually closely related to factors such as friction, roughness, chemical composition, temperature, humidity, etc. of the material surface;

[0200] The test principle of the sticky feeling test of the present embodiment is: the building block color plate / square plate and the imitation skin leather material are fixed respectively, and the leather material is moved at a certain speed to simulate the situation of the human hand sliding in contact with the building block surface during playing with the building blocks. During sliding, due to the effect of friction and surface properties, it often produces a jam and is accompanied by a creaking or clunking sound, which reflects people's intuitive feeling of the degree of stickiness of the material. Accordingly, by quantifying the acceleration change when jamming, the sticky feeling characteristics of the material can be effectively evaluated.

[0201] 3) Hardness test:

[0202] Preparation stage: Prepare LX-D Shore D high hardness rubber hardness tester, and ensure that it is in good working condition. Place the target building block smoothly on the test platform to ensure that the test surface is flat and free of foreign matter.

[0203] Perform the test: According to the test standard ISO 48-4, use the LX-D Shore D high hardness rubber hardness tester to vertically apply the pressure pin to the surface of the target building block. After applying pressure, keep the pressure pin in contact with the building block surface for 10 seconds to ensure the stability of the measurement results. After 10 seconds, read the scale value displayed by the hardness tester pointer, which is the hardness value of the test point. In order to improve the measurement accuracy, select 5 test points on different positions of the sample for measurement; the measurement steps of each test point are the same as above, and the measurement conditions of each point are ensured to be consistent.

[0204] Measurement and analysis: Record the hardness value of each test point. Calculate the average value of the hardness values of the 5 test points, which is the final hardness value of the sample.

[0205] Determination result: According to the hardness standard, the average value is evaluated in the hardness interval to obtain the hardness evaluation result.

[0206] The contact feeling evaluation result of the target building block is composed of the cool feeling evaluation result, the sticky feeling evaluation result and the hardness evaluation result.

[0207] Table 13 Hardness Standard Evaluation Table

[0208]

[0209] As shown in Table 13, which is a hardness standard evaluation table, the specific evaluation details of the hardness standard are shown, including evaluation content, evaluation standard, evaluation grade and result.

[0210] It should be noted that hardness is an important indicator of the surface scratch resistance of plastic products, and is usually measured using a hardness tester. High hardness plastic products can reduce damage to the surface by external objects and reduce the risk of scratching; low hardness plastic materials are relatively soft and are easily affected by scratches, and are prone to indentation or scratches. For building blocks, appropriate hardness not only ensures product quality, but also improves tactile sensation, so that it is neither too hard nor too soft, thereby improving user experience and evaluation;

[0211] The test principle of the hardness test of the present embodiment is: hardness measurement relies on the static hardness test method, which evaluates the hardness of the sample by measuring the depth of the pressure needle pressed into the surface of the sample after applying a specified load. For hardness measurement of building blocks, a Shore hardness tester is often used, which is equipped with a steel pressure needle. During the test, the pressure needle is vertically pressed into the surface of the sample under the action of a predetermined test force until the surface of the pressure needle is in complete contact with the surface of the sample. At this time, the length of the needle tip protruding from the surface of the pressure needle becomes an important indicator of the Shore hardness, and the length of the protrusion (i.e. L value) is inversely proportional to the hardness value, i.e. the larger the L value, the lower the hardness; on the contrary, the higher the hardness. Shore hardness tester is divided into LX-D type (suitable for high hardness rubber) and LX-A type (suitable for medium and low hardness rubber). Since building blocks are usually made of high hardness ABS material, it is recommended to use LX-D Shore D high hardness rubber hardness tester for measurement.

[0212] The present embodiment comprehensively evaluates the tactile sensation of the target building block from the dimensions of coolness, stickiness and hardness, covering the main tactile sensation problems that users may encounter when using building blocks; by measuring the surface temperature, maximum acceleration and needle tip protrusion length, the subjective feelings of stickiness and hardness are converted into objective and quantifiable indicators, improving the scientificity and accuracy of the evaluation.

[0213] ⑤ Anti-aging test:

[0214] Preparation stage: Prepare the air exchange type precision aging test machine and the constant temperature and humidity test chamber, and ensure that the equipment is in good working condition. According to the test requirements, set the environmental conditions of the above two aging chambers, such as temperature, humidity, light, ozone concentration, etc. The hot oxygen aging condition is set to 60°C for 48 hours; the humid heat aging condition is set to 60°C, 90% humidity, and 1 week; the target blocks are divided into groups, and a part is placed in the air exchange type precision aging test machine (simulating a hot oxygen environment), and the other part is placed in the constant temperature and humidity test chamber (simulating a humid heat environment). Ensure that the placement position of the target blocks in the aging chamber is uniform to avoid test deviation caused by different positions; in addition to dividing the target blocks into groups after being placed in the humid heat environment and the hot oxygen environment, two groups of target blocks with the same parameters can also be placed in the humid heat environment and the hot oxygen environment for comparison test; it should be noted that the time parameters of the hot oxygen aging condition and the humid heat aging condition can be set consistently, or set to different lengths according to actual needs, depending on the environmental simulation scene corresponding to the test target, the response characteristics of the material under different aging mechanisms, and the specific time requirements of the related industry standards for this type of test.

[0215] Perform test 1: Start the aging chamber and perform accelerated aging treatment on the target blocks according to the set environmental conditions. The aging time is set to seven days, and the equipment running state and sample state need to be checked regularly during the period; after the aging treatment is completed, the first target block and the second target block after the aging treatment are taken out from the air exchange type precision aging test machine and the constant temperature and humidity test chamber respectively, and the target blocks are ensured not to be damaged during the taking-out process.

[0216] Perform test 2: Use the full-automatic plug-in force tester to test the plug-in force of the first target block and the second target block after aging according to the plug-in force test method in step S1 of the embodiment.

[0217] Measurement and analysis: During the execution of test 2, record the plug-in force data of each block to obtain the hot oxygen plug-in force core mechanical parameter and the humid heat plug-in force core mechanical parameter; wherein the hot oxygen plug-in force core mechanical parameter includes the parameters of the first target block's introduction section, insertion section and pull-out section, and the humid heat plug-in force core mechanical parameter includes the parameters of the second target block's introduction section, insertion section and pull-out section.

[0218] Determination result: According to the hot oxygen aging evaluation standard and the humid heat aging evaluation standard, the humid heat plug-in force core mechanical parameter and the hot oxygen plug-in force core mechanical parameter are evaluated respectively to obtain the anti-aging evaluation result including the scores of the introduction section, the insertion section and the pull-out section.

[0219] Table 14 Hot oxygen aging evaluation standard evaluation table

[0220]

[0221]

[0222] As shown in Table 14, which is a heat-oxidative aging evaluation standard evaluation table, the specific evaluation details of the heat-oxidative aging evaluation standard are shown, including evaluation content, evaluation standard, evaluation grade and result.

[0223] Table 15 Humid Heat Aging Evaluation Standard Evaluation Table

[0224]

[0225] As shown in Table 15, which is a humid heat aging evaluation standard evaluation table, the specific evaluation details of the humid heat aging evaluation standard are shown, including evaluation content, evaluation standard, evaluation grade and result.

[0226] It should be noted that in the application process of the building block toy, the aging test can be used as a supervision means. By simulating different aging environments such as heat-oxidative aging and humid heat aging, the aging test can not only find whether the building block toy appears discoloration, brittleness and other phenomena from the appearance, but also observe the plug-in force of the sample after aging and calculate the force value change rate. If the plug-in force change rate is too large, it means that the building block becomes very difficult to plug or too loose after aging, which greatly affects the fluency and interest of the user in playing; if the plug-in force change rate is not large, it means that the material has relatively stable performance during the aging process and has good anti-aging property and high product quality.

[0227] The test principle of the anti-aging test of this embodiment is: by simulating various natural environmental conditions, an accelerated aging test is performed on the material or product to evaluate its performance change and durability in the long-term use process. The aging chamber, as a professional equipment, can simulate high temperature, low temperature, humid heat, light and ozone and other environmental factors, and accelerate the aging process of the material by precisely controlling these conditions. This method enables to obtain the aging data of the material in the natural environment in a relatively short time.

[0228] This embodiment can truly reflect the aging conditions that the target building block may encounter in actual use by simulating the humid heat environment and the heat-oxidative environment, improving the scientificity and accuracy of the evaluation. Moreover, by plug-in force test, the humid heat plug-in force and the heat-oxidative plug-in force, which are two core mechanical parameters, are extracted, which are directly related to the performance of the building block in actual use and have clear pertinence.

[0229] This embodiment S2 tests the target building block from three dimensions of surface characteristics, human-computer interaction and durability, ensuring the completeness of the evaluation. Moreover, each test category is further divided into specific test items, forming a test system with clear levels and reasonable structure.

[0230] S3, the quality evaluation result of the target building block is formed by the plug-in force evaluation result and the comprehensive performance evaluation result.

[0231] The step S3 of the embodiment of the present application is specifically:

[0232] The quality evaluation result of the target building block is formed by the plug-in force evaluation result and the comprehensive performance evaluation result; wherein the comprehensive performance evaluation result includes the surface gloss evaluation result, the anti-stain evaluation result, the holding feeling evaluation result, the contact feeling evaluation result and the anti-aging evaluation result, and each type of evaluation result contains the scores obtained by the target building block under different test conditions;

[0233] According to the preset scoring standard, the building block corresponding parameters that do not meet the quality requirements in the quality evaluation result are marked and recorded, and are fed back to the production department or the supplier, so as to be improved or replaced.

[0234] It should be noted that for the building block combination, the plug-in force test process needs to follow the following logic: after the building block combination completes the clamping preparation operation and is completely separated, the plug-in test should be performed first, and the force value information of the lead-in section and the plug-in section is collected synchronously; after the plug-in operation is completed, the pull-out test is performed, and the force value data of the pull-out section is recorded. Through this complete cycle of "first plug-in and then pull-out", the full-stage data of the plug-in and pull-out process can be covered, the complete evaluation requirement of the three stages (lead-in section, plug-in section and pull-out section) of the force value curve in the test standard is met, and the comparability and effectiveness of the data between different samples are ensured.

[0235] Overall, the embodiment has the following beneficial effects:

[0236] The plug-in force evaluation of the present application is performed immediately after the target building block combination is completed, which can capture the connection performance of the building block in the initial state, which helps to find potential defects in the design or manufacturing process; and the plug-in force evaluation is performed after a preset delay period, which can simulate the performance change of the building block after long-term use or storage, so as to evaluate the durability and stability thereof; the combination of the immediate and delayed evaluation can more comprehensively reflect the plug-in performance of the building block in the whole life cycle, which helps to find the decline of the plug-in performance of the building block due to material aging, structure loosening and other factors, so as to early warn potential quality problems. In addition, the comprehensive performance test covers surface property test, human-computer interaction test and durability test and other aspects, which comprehensively considers the comfort, ease of use and long-term stability of the building block in the use process from the user's point of view, and ensures the comprehensiveness and practicality of the building block quality evaluation;

[0237] In summary, the evaluation method proposed in this application comprehensively covers the diversified performance of building blocks in actual application, not only involving the key indicator of insertion and removal force, but also deeply considering multiple dimensions such as surface quality, holding comfort and contact feeling, thereby providing a comprehensive and multi-angle evaluation framework. By establishing a systematic test process and scoring standard, the objectivity and repeatability of the test results are ensured, and a standardized operation model for building block quality evaluation is established. In addition, the innovative comprehensive scoring system and long-term performance evaluation strategy in this application have a pioneering significance in the industry, which not only brings new thinking angles and solutions to the industry, but also effectively makes up for the shortcomings of the prior art. This test scheme and scoring system, with its high practicability, can be directly integrated into the actual product development process and quality control system, helping manufacturers continuously improve product design and thus improving the overall experience of end users. It is worth mentioning that this application shows excellent universality and expansion potential, and can be flexibly applied to various different specifications and types of building block toys, fully meeting the diversified needs of different manufacturers.

[0238] Embodiment two:

[0239] Please refer to Figure 7 The embodiment of the application provides a device for comprehensively evaluating the quality of toy building blocks, including an insertion and removal module 10, a comprehensive module 20 and a construction module 30.

[0240] The insertion and removal module 10 is used to perform insertion and removal processing on the target building block combination after the target building block combination is completed at the moment and after a predetermined delay period, respectively, to obtain an insertion and removal force evaluation result; wherein the target building block combination is an insertion and removal assembly composed of a plurality of target building blocks.

[0241] The comprehensive module 20 is used to perform comprehensive performance testing on the target building blocks to obtain a comprehensive performance evaluation result; wherein the comprehensive performance testing includes surface property testing, human-computer interaction testing and durability testing.

[0242] The construction module 30 is used to construct the quality evaluation result of the target building blocks from the insertion and removal force evaluation result and the comprehensive performance evaluation result.

[0243] In one embodiment, the insertion and removal module 10 includes a fine adjustment unit and an insertion and removal unit.

[0244] The fine adjustment unit is configured to clamp and fix the lower part of the first target building block combination on the lower clamp of the full-automatic plug-in force testing machine in a preset value stage; the modular plug-in assembly of the first target building block combination is consistent with the corresponding assembly of the target building block in terms of geometric shape and mechanical locking characteristic parameters; and the first target building block combination and the target building block combination are both plug-in assemblies of two 2×4 standard target building blocks, wherein the 2×4 standard target building block refers to a standard building block with a length of two basic building block unit sizes and a width of four basic building block unit sizes.

[0245] The fine adjustment unit is further configured to extend the building block upward after the lower clamp is clamped, so that the top end (upper part) of the building block extends through the reference surface of the lower clamp and reaches the upper clamp region above the reference surface. The reference surface refers to the plane where the upper clamp and the lower clamp of the full-automatic plug-in force testing machine can contact each other. The scale line of the upper clamp is marked upward from the reference surface, and the scale line of the lower clamp is marked downward from the reference surface.

[0246] The fine adjustment unit is further configured to control the upper clamp of the full-automatic plug-in force testing machine to move upward (away from the reference surface of the lower clamp), so that when the upper part of the building block (which has passed through the reference surface of the upper clamp) continues to extend upward and exceeds the scale line of the upper clamp by 1-2 grades, the extension is stopped. For example, the reference surface is 0 grade, 1 grade is 10 mm, and 2 grade is 20 mm. When the top end of the upper part of the building block exceeds the reference surface of the upper clamp by 10-20 mm and completely enters the clamping range of the upper clamp, the building block is considered to have exceeded 1-2 grades, and the subsequent clamping can be firmly fixed.

[0247] The fine adjustment unit is further configured to clamp the upper clamp (at this time, the position of the upper clamp is fixed, and the upper part of the building block is locked), release the lower clamp and move it downward (away from the reference surface of the upper clamp), and then clamp the lower part of the building block again. At this time, the clamping position of the lower part needs to correspond to the reference surface of the lower clamp downward by 1-2 grades. After the adjustment is completed, the building block is clamped to ensure that the clamping force of the upper clamp and the lower clamp does not affect the plug-in force of the building block, thereby completing the clamping preparation operation.

[0248] The fine adjustment unit is further configured to set the file name and movement parameters through computer software, mainly to test the full-range force of insertion and extraction. The displacement or stroke length involved in the insertion or extraction action can be controlled to 1.1 mm. Designing the stroke to be 1.1 mm can not only fully cover most of the stroke from the initial contact to the complete contact process, ensuring the integrity of the test data, but also effectively avoid plastic deformation of the building block caused by excessive extrusion, which may interfere with the test results. Based on the above factors, the stroke is set to 1.1 mm. At the same time, this value can be flexibly adjusted within the range of 1.0-1.2 mm according to actual test requirements to achieve the best test contact effect.

[0249] The fine adjustment unit is also used for adjusting the lower clamp to move down 2mm in advance to ensure that the building blocks are completely separated before the plug-in force test is performed, and then zeroing the parameters of the full-automatic plug-in force testing machine.

[0250] For application of the embodiments of the present application, please refer to Figures 2-3 , Figure 2 is a building block display diagram provided by the embodiments of the present application, which presents a standard target building block of 2x4 specification;

[0251] Figure 3 is a building block plug-in schematic diagram provided by the embodiments of the present application, which presents the clamping condition of the target building block combination when the full-automatic plug-in force testing machine completes the clamping preparation operation through the clamps clamping the target building block combination.

[0252] The fine adjustment unit of the present embodiment can ensure that the clamping position and condition of the building block combination remain consistent during each test by correcting the clamping position of the full-automatic plug-in force testing machine, thereby improving the accuracy and repeatability of the test. Moreover, the modular plug-in assembly of the first target building block combination remains consistent with the corresponding assembly of the target building block in terms of geometric morphology and mechanical locking characteristics, thereby ensuring the accuracy and comparability of the test.

[0253] The plug-in unit is used for tightly splicing two target building blocks together during the actual test stage, and after the target building block combination is spliced, the plug-in and pull-out processes of the target building block combination are performed by the full-automatic plug-in force testing machine according to the above steps, specifically as follows: for the target building block combination that has been spliced, the clamping preparation operation is first completed on the full-automatic plug-in force testing machine, and it is ensured that the building blocks are completely separated; during the test, the upper clamp of the full-automatic plug-in force testing machine fixes the upper part of the target building block combination, and the lower clamp first drives the lower part of the target building block combination to move upwards and insert into the upper part of the target building block combination, thereby completing the insertion operation and synchronously acquiring the data of the lead-in section and the insertion section; then the lower part is driven to move downwards to perform the pull-out operation, and the data of the pull-out section is synchronously acquired, so as to completely simulate the entire plug-in and pull-out process; the test is repeated for 5 times, and the curves of the resistance values generated during the plug-in and pull-out processes with respect to the plug-in displacement are recorded by the sensor to obtain the plug-in and pull-out force curve; wherein the plug-in and pull-out processes are controlled by the downward and upward movement of the lower clamp; the preset delay period is three days after the target building block combination is spliced and rested, and the test conditions of the previous and subsequent tests are consistent;

[0254] The plug-in unit is also used for analyzing the plug-in and pull-out force curve, respectively counting the lead-in section, the insertion section and the pull-out section of the building block material initial plug-in and pull-out force curve and the lead-in section, the insertion section and the pull-out section of the plug-in and pull-out force curve after splicing for three days, calculating the change of each section of the building block plug-in and pull-out force, and obtaining the plug-in and pull-out force core mechanical parameters including the slope coefficient of the lead-in section, the maximum insertion force of the insertion section and the maximum pull-out force of the pull-out section;

[0255] The plug-pull unit is also used for parameter evaluation of the plug-pull core mechanical parameters according to short-term evaluation criteria and long-term evaluation criteria, to obtain plug-pull force evaluation results containing scores of the introduction section, the insertion section and the pull-out section.

[0256] The introduction section refers to the process of aligning and initially contacting the front chamfer until starting to insert when the user is splicing the building blocks. A suitable force value slope of the introduction section can help the user quickly locate and obtain immediate feedback of splicing. If the force value of the introduction section is too large, it will increase the difficulty of insertion; on the contrary, if the force value is too small, it may not effectively transmit the tactile signal of "alignment";

[0257] The insertion section is followed by the introduction section, which is the process of continuously applying force to completely insert the building blocks. Proper insertion force can ensure that the user enjoys a smooth insertion experience. Too large insertion force may cause insertion resistance or hand fatigue; too small force value may affect the stability of splicing, thereby weakening the durability of the finished product;

[0258] The pull-out section is the process of pulling out the building blocks from the spliced state when the user is disassembling the building blocks. A suitable pull-out force can provide a smooth pull-out feeling for the user. Too large pull-out force may cause difficulty in pulling out or cause hand discomfort; too small force value may mean that the splicing is not firm enough, thereby affecting the overall durability of the finished product.

[0259] The short-term evaluation criteria and the long-term evaluation criteria for parameter evaluation of the plug-pull core mechanical parameters are defined according to the division of plug-pull force values by different toy manufacturers and feedback from customers during the plug-pull process.

[0260] Table 1 Short-term evaluation criteria evaluation table

[0261]

[0262] As shown in Table 1, the table is a short-term evaluation criteria evaluation table, which shows the specific evaluation details of the short-term evaluation criteria, including evaluation content, evaluation criteria, evaluation grade and results.

[0263] Table 2 Long-term evaluation criteria evaluation table

[0264]

[0265]

[0266] As shown in Table 2, which is a long-term evaluation standard evaluation table, the specific evaluation details of the long-term evaluation standard are shown, including evaluation content, evaluation standard, evaluation grade and result. It should be noted that in this embodiment, since the two target building blocks are in a simulated assembled and long-term stationary state, the building block insertion structure will undergo slight irreversible deformation under the action of continuous force, which is manifested as the insertion interface being gradually opened due to long-term force support. This change in structure directly leads to a decrease in resistance during the insertion and removal of the building blocks, i.e., a decrease in insertion and removal force. In contrast, if the building blocks are in a non-assembled and independently stored state and are left for a long time, the size of the building blocks will shrink due to environmental stress release or changes in physical properties, and the original matching insertion gap will decrease, making the building block interface more compact. This increase in structural compactness will significantly increase the friction and engagement resistance during the insertion and removal process, thereby causing the insertion and removal force to increase.

[0267] It should be noted that the test method of the insertion and removal module 10 in this embodiment is an insertion and removal force test performed by an insertion and removal force sensor test instrument, including short-term insertion and removal tests and long-term insertion and removal tests.

[0268] The short-term insertion and removal test specifically refers to the initial state material that has not been affected by use, aging or environmental factors. The original insertion and removal force characteristics of the material are quantified through standardized mechanical testing methods to verify whether the initial performance of the material meets the design standards. This test result can provide researchers with initial performance data of the material. The test principle is as follows: the insertion and removal force test is performed by connecting two 2x4 standard building blocks together and clamping the two building blocks by the clamps of the full-automatic insertion and removal force test machine. The upper clamp is fixed in position, and the lower clamp moves up and down through precise control of the machine to achieve smooth insertion and removal of the building blocks. In the test process, a high-precision sensor captures and records the detailed curve of the resistance value changing with the insertion displacement during the insertion and removal process. As the resistance gradually increases, the insertion and removal force required by the clamp also increases, and the force value data recorded by the sensor also increases accordingly.

[0269] The long-term insertion and removal force test specifically refers to the material that has been affected by a certain period of use simulation (such as multiple insertion and removal cycles, stationary storage) or environmental factors. The change rule of the insertion and removal force characteristics of the material is quantified through standardized mechanical testing methods to verify whether the performance retention ability of the material in the long-term use scenario meets the design standards. The test is designed to evaluate the performance of the building blocks after multiple uses to ensure the stability and good user experience of the building blocks in long-term use. The test principle is as follows: the 2x4 standard building blocks are connected together and left for three days to simulate the long-term use scenario after the building blocks are assembled. By comparing the change of the insertion and removal force curve before and after the building blocks are connected and left for three days, the long-term insertion and removal force performance of the building blocks is evaluated.

[0270] In addition, in the plug-in force test, two standard blocks are tightly connected first, aiming to establish a uniform and stable initial benchmark for subsequent tests, to ensure accurate, repeatable and comparable results. The same mold cavity block size and structure are more consistent, and tight connection can make the protrusions, grooves and other parts completely fit, confirm the design fit state, eliminate false fit caused by size deviation, structural defects or misalignment, and avoid abnormal force value in subsequent tests. According to the process, the blocks need to be completely separated after being connected before starting the test; after tight connection, the blocks can be separated to ensure that the separation state is based on the loosening after complete fitting, rather than random placement, ensuring that the initial separation position and posture of each test are consistent, accurately capturing the force value change from separation to insertion, and improving the reference value of the plug-in force curve data.

[0271] For the application of the embodiments of the present application, please refer to Figure 4 , Figure 4 is a plug-in force curve display diagram provided by the embodiments of the present application, which represents the curve of the resistance value generated during the insertion and pulling-out process changing with the insertion displacement recorded by the sensor, which is divided into three parts: the introduction section, the insertion section and the pulling-out section.

[0272] The plug-in unit of the embodiments performs plug-in force tests at the time when the block combination is connected and at the preset delay period, which can evaluate the mechanical property changes of the block combination at different time points, and is helpful to understand the long-term stability and durability of the block combination. Moreover, by controlling the upward and downward movement of the lower clamp, the plug-in force test is quickly realized, the test period is shortened, and the evaluation efficiency is improved;

[0273] Moreover, the plug-in assembly of the blocks is one of the most important functions of the block toys, and good plug-in experience directly affects the customer's recognition of the product. By measuring the plug-in force, the plug-in feel of the blocks can be quantitatively described, and the differences in plug-in performance of different materials in block applications can be reflected. By analyzing these data, the performance of different materials in plug-in feel can be intuitively displayed.

[0274] In one embodiment, the comprehensive module 20 is specifically:

[0275] The target block is subjected to comprehensive performance test to obtain a comprehensive performance evaluation result.

[0276] The comprehensive performance test includes surface property test, human-computer interaction test and durability test; the surface property test includes surface gloss test and stain resistance test, the human-computer interaction test includes holding feel test and contact feel test, and the durability test includes anti-aging test. The various test methods are described in detail below.

[0277] ①The surface gloss test includes glossiness test and surface roughness test.

[0278] 1) Glossiness test:

[0279] Preparation stage: In order to ensure the accuracy and reliability of the test, a sample made of target building blocks is prepared in advance, which can be in the form of a color plate or a square plate. Before testing, the gloss meter is calibrated to ensure the accuracy of the measurement results. Then, place the sample to be tested on the test table of the gloss meter, make sure the surface of the sample is clean and free of defects, and avoid stains and scratches that may affect the test results.

[0280] Test execution: After turning on the power of the gloss meter, select the 60-degree geometric reflection test mode (if the device does not have a specific mode, select the gloss measurement value corresponding to 60 degrees), accurately align the test head of the gloss meter with the surface of the sample, and start the test button.

[0281] Measurement and analysis: After the test is completed, record the test results to obtain the gloss of the target building blocks;

[0282] Determination result: According to the gloss standard, the gloss of the target building blocks is evaluated to obtain the gloss evaluation result.

[0283] Table 3 Gloss standard evaluation table

[0284]

[0285] As shown in Table 3, the table is a gloss standard evaluation table, which shows the specific evaluation details of the gloss standard, including evaluation content, evaluation standard, evaluation grade and result.

[0286] It should be noted that gloss is a characteristic of the surface of an object, and the commonly referred to surface gloss of an object refers to its ability to reflect light. This is a relative measurement of the ability of an object to reflect light under specified geometric conditions;

[0287] The test principle of the gloss test in this embodiment is: gloss is usually detected by a gloss meter, which includes an incident light emitter, a receiver, and a standard plate and other core components. The gloss meter takes the ideal polished black glass with a refractive index of 1.567 as a reference, and defines its mirror surface reflection gloss as 100.0 gloss units. Under the same test conditions, the instrument compares the light flux reflected by the object surface and the standard plate to calculate the relative gloss value of the object surface. This value actually reflects the ratio of the object's surface reflection ability to the standard surface reflectivity, and its calculation formula is G = 100Rsample / Rstandard (where G represents gloss, and Rsample and Rstandard represent the light reflectivity of the object surface and the standard plate surface, respectively). The result is expressed in gloss units (GU).

[0288] 2) Surface roughness test:

[0289] Preparation phase: Prepare a suitable test device such as a 3D profilometer or a laser microscope, ensure that the test device is calibrated to an accurate state; prepare the target block, ensure that the surface of the target block is clean and free of stains; place the target block on the test table of the 3D profilometer or laser microscope, ensure that the target block is fixed stably; according to the test requirements, set appropriate sampling length, measurement range and other parameters.

[0290] Test execution: Start the test device and begin measuring the surface roughness of the target block.

[0291] Measurement and analysis: After the test is completed, record the surface profile data and other key parameters, and calculate the roughness (i.e. arithmetic mean roughness Ra) of the target block according to the measured data; wherein the arithmetic mean roughness Ra is obtained by calculating the arithmetic mean of the distance (i.e. deviation) of each point on the profile line to the profile center line within a certain sampling length.

[0292] Determination result: According to the surface roughness evaluation standard, the roughness is evaluated by parameters to obtain the surface roughness evaluation result;

[0293] The surface gloss evaluation result of the target block is composed of the gloss evaluation result and the surface roughness evaluation result.

[0294] Table 4 Surface roughness evaluation standard evaluation table

[0295]

[0296] As shown in Table 4, the table is a surface roughness evaluation standard evaluation table, which shows the specific evaluation details of the surface roughness evaluation standard, including evaluation content, evaluation standard, evaluation grade and result.

[0297] It should be noted that the surface roughness test is mainly used to evaluate the flatness, smoothness and machining precision of the material surface, to provide an important basis for product quality control and to ensure that the product meets the design requirements. By measuring the roughness of the block surface, it can be determined whether there are burrs or defects, so as to ensure the texture and hand feeling of the block;

[0298] The test principle of the surface roughness test of the present embodiment is as follows: the surface roughness is an index for measuring the degree of small unevenness of the surface, and the smaller the value, the smoother the surface. The sampling length is used as the baseline segment for evaluating the surface roughness characteristics. The rougher the surface, the greater the required sampling length, and the length should contain at least 5 profile peaks and valleys. The arithmetic average roughness Ra is a commonly used parameter for evaluating surface roughness, which represents the arithmetic mean of the absolute values of the profile peaks and valleys within the sampling length. By taking the reference length along the average line direction as the X axis and the longitudinal magnification ratio as the Y axis, and expressing the curve as y=f(x), the arithmetic average roughness Ra calculated by a specific formula is obtained, and its unit is usually microns.

[0299] In the present embodiment, surface quality is one of the important factors affecting the durability and reliability of the building blocks. A smooth and wear-resistant surface can resist scratches and wear, maintaining the integrity and aesthetics of the building blocks. Rough or easily worn surfaces can accelerate the aging and damage of the building blocks, so through the surface gloss test, the service life and reliability of the building blocks can be improved.

[0300] ②The stain resistance test includes water contact angle test and surface antistatic test.

[0301] 1) Water contact angle test:

[0302] Preparation stage: Place the cleaned target building block on the test platform, use a precision pipette to suck the test liquid, and accurately control the drop amount of the pipette through the computer program to ensure that the liquid drop forms a standard pear shape.

[0303] Perform the test: Drop the liquid drop on several test points on the surface of the target building block, and use the camera of the contact angle measuring instrument to collect the image of the liquid drop on the solid surface, ensuring that the image is clear and complete. To ensure the accuracy of the measurement results, five test points can be selected for calculation;

[0304] Measurement and analysis: Use the image processing system of the contact angle measuring instrument to process the collected image, measure the contact angle between the liquid drop and the surface of the target building block, and obtain several contact angles.

[0305] Determination of results: Calculate the average value of the several contact angles, evaluate the average value according to the water contact angle standard, and obtain the water contact angle evaluation result.

[0306] Table 5 Water contact angle standard evaluation table

[0307]

[0308] As shown in Table 5, the table is a water contact angle standard evaluation table, which shows the specific evaluation details of the water contact angle standard, including evaluation content, evaluation standard, evaluation grade and result.

[0309] It should be noted that the contact angle is the geometric angle formed by the liquid droplet on the solid surface, especially at the gas-liquid-solid three-phase junction, the angle between the gas-liquid interface tangent and the solid-liquid junction line. This angle is an important parameter for measuring the wettability of the liquid on the solid surface. The contact angle reflects the interaction strength between the liquid and the solid, thereby helping to understand the diffusion, penetration and other behaviors of the liquid on the solid surface;

[0310] The test principle of the water contact angle test of the embodiment is as follows: the measurement of the contact angle involves three key elements: the profile shape of the droplet, the measurement baseline as the reference (i.e. the horizontal line of the solid surface, on which the droplet is placed), and the tangent slope at the intersection point of the droplet edge and the baseline. The contact angle specifically refers to the angle formed by the intersection position of the droplet edge and the measurement baseline. When the solid surface is completely wetted by the liquid, the contact angle is 0°. If the contact angle is between 0° and 90°, it indicates that the solid surface has wettability and strong hydrophilic performance. When the contact angle exceeds 90°, it means that the solid surface is not easy to be wetted, showing strong hydrophobicity. The larger the value of the contact angle, the stronger the hydrophobicity.

[0311] For the application of the embodiment, please refer to Figure 5 , Figure 5 The contact angle display diagram provided by the embodiment of the present application shows the wetting condition of the solid surface by the liquid when the contact angle θ is of different sizes.

[0312] 2) Surface antistatic test:

[0313] Preparation stage: Place the target building block between the test electrodes of the volume surface resistivity tester, ensuring good contact.

[0314] Perform the test: Start the volume surface resistivity tester and begin measuring the surface resistance of the target building block.

[0315] Measurement and analysis: Record the test data to obtain the surface resistance value of the target building block.

[0316] Determine the result: Perform parameter evaluation on the surface resistance value of the target building block according to the surface antistatic standard to obtain the surface antistatic evaluation result;

[0317] The antifouling property evaluation result of the target building block is composed of the water contact angle evaluation result and the surface antistatic evaluation result.

[0318] Among them, the target building block is made of ABS material as the main building block material, and the body resistance is generally about 10 12Ω, and is classified as a basic antistatic level; in order to further improve its antistatic performance and upgrade the antistatic level, a conductive agent can be added to reduce the resistivity, thereby achieving effective antistatic effect; wherein "ABS material" refers to acrylonitrile-butadiene-styrene (ABS) copolymer material.

[0319] Table 6 Surface antistatic standard evaluation table

[0320]

[0321]

[0322] As shown in Table 6, which is a surface antistatic standard evaluation table, the specific evaluation details of the surface antistatic standard are shown, including evaluation content, evaluation standard, evaluation grade and result.

[0323] It should be noted that the antistatic level is mainly based on the surface resistance value, which is divided into basic antistatic level, antistatic level and conductive static level. The smaller the surface resistance, the stronger the antistatic performance. The surface resistance of the basic antistatic level is between 10 9 ~ 10 12 Ω, the surface resistance of the antistatic level is between 10 6 ~ 10 9 Ω, and the surface resistance of the conductive static level is between 10 4 ~ 10 6 Ω ohms.

[0324] In this embodiment, a number of test points are selected on the surface of the target building block for droplet testing, which can comprehensively reflect the anti-stain performance of different areas of the building block surface, avoiding evaluation deviation caused by local differences;

[0325] In addition, the building block may be contaminated with liquid pollutants during use due to hand sweat or misoperation. At the same time, due to the effect of static electricity, the building block surface may adsorb some dust, affecting its use feel. Therefore, the contact angle and antistatic performance of the building block surface need to be measured to characterize its surface properties and judge the anti-stain performance of the building block.

[0326] ③Grip feeling test includes density test and sharp edge detection.

[0327] 1) Density test:

[0328] Preparation stage: confirm the target building block to be tested, ensure that its mass is above 1g to meet the measurement requirements; prepare the density tester and the auxiliary liquid with known density, ensure that the density meter is in normal working condition; check whether the auxiliary liquid is clean and free of impurities to avoid interference with the measurement results; use the density tester to weigh the mass of the target building block in the air, and record it as A.

[0329] Test execution: Put the target block into the auxiliary liquid, make sure the target block is completely immersed and no bubbles are generated; use the density tester to weigh the mass of the target block in the auxiliary liquid, and record it as B.

[0330] Measurement and analysis: Based on the density of the auxiliary liquid ρ0, the density of air ρ L , the mass of the target block in air A and the mass of the target block in the auxiliary liquid B, the density of the target block is calculated according to the preset formula; due to the existence of system error, 3-5 repeated measurements should be performed for each target block, and the average value of the density is taken as the final result to improve the accuracy of the measurement;

[0331] Determination result: The density is evaluated for qualification according to the density standard, and the density evaluation result is obtained.

[0332] Wherein, the preset formula is:

[0333]

[0334] Wherein, ρ is the density of the sample to be measured, A is the mass of the sample in air, B is the mass of the sample in the auxiliary liquid, ρ0 is the density of the auxiliary liquid, and ρ L is the density of air.

[0335] Table 7 Density standard evaluation table

[0336]

[0337] As shown in Table 7, the table is a density standard evaluation table, which shows the specific evaluation details of the density standard, including evaluation content, evaluation standard, evaluation grade and result.

[0338] It should be noted that the density of the block toy directly affects the texture of holding. If the density is too small, the toy feels light, which looks cheap; and if the density is too heavy, it will increase the burden of the hand and reduce the user experience. Therefore, it is necessary to ensure that the block material has a proper density value;

[0339] The test principle of the density test of this embodiment is: according to Archimedes' principle, the buoyancy method is used to measure the density of solid. The principle points out that the object partially or completely immersed in the fluid will be subjected to an upward buoyancy, which is equal to the weight of the fluid displaced by the object. According to this, the weight of the solid is first measured in air, and then weighed again in the auxiliary liquid with known density. Using the density formula, the density of the solid ρ can be accurately calculated.

[0340] 2) Sharp edge detection:

[0341] Preparation: Select UL sharp edge tester as the detection tool. Prepare three layers of self-adhesive test tape, which is used to simulate human finger skin; refer to the UL sharp edge test method, adjust the tester to the appropriate test state. Pre-set a load of 6N at the edge of the target building block to simulate human hand force. Attach the three layers of self-adhesive test tape to the edge of the target building block for testing.

[0342] Perform test: Apply the pre-set 6N load at the edge of the building block, then control the test tape to roll back and forth along the detection edge, ensuring that the total rolling distance is 101mm.

[0343] Measurement and analysis: After the test is completed, carefully check the degree of cutting of the test tape after rolling. Measure the length of the self-adhesive test tape that is completely cut, including any intermittent cutting parts. Calculate the percentage of the length of the cut self-adhesive test tape to the total length of the self-adhesive test tape in contact with the edge to obtain the cutting percentage.

[0344] Determination result: According to the sharp edge standard, evaluate the cutting percentage for the degree of cutting to obtain the sharp edge evaluation result; wherein if more than 50% of the self-adhesive test tape is completely cut, the edge of the building block is considered a sharp edge and does not meet the safety standard. If it is not more than 50%, further evaluation or recording of the results is required according to the specific standard or requirement.

[0345] The grip feeling evaluation result of the target building block is composed of the density evaluation result and the sharp edge evaluation result.

[0346] Table 8 Sharp Edge Standard Evaluation Table

[0347]

[0348] As shown in Table 8, the table is a sharp edge standard evaluation table, which shows the specific evaluation details of the sharp edge standard, including evaluation content, evaluation standard, evaluation grade and result.

[0349] For the application of the embodiments of the present application, please refer to Figure 6 , Figure 6 is a sharp edge detection display diagram provided by the embodiments of the present application, the first part shows the UL sharp edge tester, the second part shows the TC-3 test head, and the third part shows the trajectory of the sharp edge of the building block that may scratch the human hand.

[0350] It should be noted that when customers, mainly children, use building blocks, they may touch the edges of the building blocks during assembly. If the edges of the building blocks are too sharp, it may cause accidental injuries such as cuts or stings, especially for children, whose skin is more delicate and easily damaged by sharp objects. Various regional standards (such as EN 71, GB 6675, etc.) all stipulate that the edges of toys should not have sharp parts. Through sharp edge detection, it can be ensured that the product meets these regulatory requirements and avoids legal risks or market recalls due to safety issues.

[0351] The embodiment not only considers the density of the target building block as a physical property, but also evaluates its edge safety through sharp edge detection, thus forming a comprehensive system for grip feeling evaluation. Among them, density as a basic physical property of material can reflect the key information such as the material quality and structural compactness of the building block; evaluating the density for eligibility helps to select building blocks that meet the specific density requirements, ensuring the quality and consistency of the product. By testing the sharp edges by rolling the tape on the edges of the building blocks, the damage caused by traditional cutting tests is avoided, and the testing cost is reduced. In addition, by evaluating the grip feeling, the comfort and safety of users when using the building blocks can be predicted, which helps to improve the user experience of the product;

[0352] Moreover, grip feeling is the comprehensive tactile experience generated when the user's palm contacts the object. Building blocks can significantly enhance the overall texture of the product by virtue of their moderate size, just-right weight, balanced density, and delicate edge touch, thus providing users with a more outstanding user experience.

[0353] (4) Contact feeling test includes warm and cool feeling test, sticky feeling test and hardness test.

[0354] 1) Warm and cool feeling test:

[0355] Preparation stage: Ensure that the shape and size of the target building block strictly meet the technical specifications of the laser flash method test, which is based on the standard GB / T 22588. Place the target building block in a sample chamber containing a protective atmosphere to protect the sample from external interference. Set the test parameters, such as laser intensity, pulse time, etc.

[0356] Perform the test: Based on the laser flash method, use a laser flash heat conduction instrument to irradiate the target building block with a high-intensity laser pulse for a short time. After the target building block's surface absorbs the pulse energy, the heat propagates inward, causing the temperature on the back of the target building block to rise. Record the change in temperature on the back of the target building block over time using a temperature gun.

[0357] Measurement and analysis: collect test data, including laser pulse energy, temperature change curve of the back of the block over time, etc. According to the data processing method, the thermal diffusivity of the material is calculated; wherein the thermal diffusivity is calculated according to the collected data of laser pulse energy and temperature change curve of the back of the block over time, using the thermal diffusivity calculation formula (usually based on one-dimensional heat conduction model and laser flash method principle), according to the data processing method (including temperature peak identification, half-width time calculation, etc. Steps) to calculate.

[0358] Determination result: according to the block surface temperature standard, the surface temperature and thermal diffusivity of the target block are evaluated, and the cool feeling evaluation result is obtained.

[0359] Table 9 Block surface temperature standard evaluation table

[0360]

[0361] As shown in Table 9, the table is a block surface temperature standard evaluation table, which shows the specific evaluation details of the block surface temperature standard, including evaluation content, evaluation standard, evaluation grade and result.

[0362] Table 10 Thermal diffusivity standard evaluation table

[0363]

[0364] As shown in Table 10, the table is a thermal diffusivity standard evaluation table, which shows the specific evaluation details of the thermal diffusivity standard, including evaluation content, evaluation standard, evaluation grade and result.

[0365] It should be noted that the cool feeling is a subjective tactile sensation produced by the human skin after contacting an object. The cool feeling of the block toy is mainly related to the thermal conductivity of the material. If the block touch is too cold, especially in cold environments, children's hands may feel uncomfortable when touching, which may reduce the desire to play. On the contrary, if the block touch is warm, it may bring a comfortable touch in a suitable environment, stimulating stronger interest in playing. The cool feeling will also affect the grip. When the block touch is cool, the hand muscles may involuntarily contract, and the gripping force may change, affecting the stability during the building process; while the appropriate warm feeling may make the hand muscles more relaxed, helping to better grip and operate the block;

[0366] The test principle of the cool feeling test of the present embodiment is: the evaluation of cool feeling covers two aspects of surface temperature and heat conduction performance, respectively simulating the use experience of the building blocks in the initial contact and continuous contact. The measurement of surface temperature can be completed by means of a precise temperature measuring gun. As for the test of heat conduction performance, an advanced laser flash method is adopted. According to the theoretical model of sheet-shaped thermal insulation material, the sample to be tested is placed in a sample chamber filled with protective gas. A high-intensity laser pulse is used to irradiate the sample instantaneously, so that the sample surface layer rapidly absorbs energy, and the heat is conducted to the interior, causing the temperature of the back surface of the sample to rise. After a series of precise data processing procedures, the thermal diffusivity and thermal conductivity of the material can be finally obtained, providing a scientific basis for the quantitative evaluation of cool feeling.

[0367] 2) Stickiness test:

[0368] Preparation stage: the target building block and the imitation skin leather material are respectively fixed on the A end and B end clamps of the stick-slip tester by strong double-sided adhesive, wherein the A end clamp fixes the target building block, and the B end clamp fixes the imitation skin leather material. The fixing process needs to ensure that the target building block is firmly attached without shaking, and the imitation skin leather material needs to be tightly fixed on the corresponding end of the test structure to ensure that the moving parts can move smoothly and uniformly during the test. During the test, the B end of the stick-slip tester pasted with the imitation skin leather material remains stationary, and the A end pasted with the target building block moves at a set speed, thereby accurately simulating the real scene of the human hand sliding on the surface of the building block when playing with it. During the relative sliding of the two, under the combined action of the surface properties and friction of the materials, the contact interface often appears to be stuck, accompanied by a creaking or crunching sound. These perceptible phenomena are important indicators for the human body to judge the stickiness of different materials. Based on this, by measuring the acceleration-time signal generated when the sticking occurs, the moving stickiness characteristics of the materials can be effectively characterized. At the same time, according to the test standard, the imitation skin leather material is set to act on the target building block with a normal force of 6N, and the moving speed of the target building block is set to 0.5mm / s (simulating slow movement of the fingers) and 6mm / s (simulating fast movement of the fingers) respectively. The test cycle number is set to three cycles to ensure the stability and reliability of the test results.

[0369] Test execution: start the stick-slip tester and begin the test. Control the leather to move on the building block sample at the set speed and normal force. During the test, the tester will monitor and record the acceleration data generated during the sticking process in real time.

[0370] Measurement and analysis: after the test is completed, the acceleration data is exported from the tester. Find the maximum acceleration value generated during the test, which will be used to characterize the stickiness of the materials.

[0371] The evaluation result of stickiness is obtained by evaluating the maximum acceleration generated during slow movement and fast movement according to the slow movement evaluation standard and the fast movement evaluation standard respectively; wherein, the scoring standards of slow sliding and fast sliding are the same, and each accounts for fifty percent, and the sum of the two is the total score of the stickiness evaluation result.

[0372] Table 11: Slow movement evaluation standard evaluation table

[0373]

[0374] As shown in Table 11, the table is a slow movement evaluation standard evaluation table, which shows the specific evaluation details of the slow movement evaluation standard, including evaluation content, evaluation standard, evaluation grade and result.

[0375] Table 12: Fast movement evaluation standard evaluation table

[0376]

[0377] As shown in Table 12, the table is a fast movement evaluation standard evaluation table, which shows the specific evaluation details of the fast movement evaluation standard, including evaluation content, evaluation standard, evaluation grade and result.

[0378] It should be noted that the stickiness (or "stickiness") of the plastic material refers to a viscous or greasy feeling of the material surface during contact or friction. This feeling is usually closely related to factors such as friction, roughness, chemical composition, temperature, humidity, etc.

[0379] The test principle of the stickiness test in this embodiment is: the building block color plate / square plate and the imitation skin leather material are fixed respectively, and the leather material is moved at a certain speed to simulate the situation of the human hand sliding on the surface of the building block during playing the building block. During sliding, due to the effect of friction and surface properties, it often produces jamming and is accompanied by creaking or clunking sound, which reflects people's intuitive feeling of the degree of stickiness of the material. Accordingly, by quantifying the acceleration change when jamming, the stickiness characteristics of the material can be effectively evaluated.

[0380] 3) Hardness test:

[0381] Preparation stage: Prepare LX-D Shore D type high hardness rubber hardness tester, and ensure that it is in good working condition. Place the target building block on the test platform smoothly, and ensure that the test surface is flat and free of foreign matter.

[0382] Test execution: According to the test standard ISO 48-4, use LX-D Shore D high hardness rubber hardness tester, apply the pressure needle vertically to the target block surface. After applying pressure, keep the pressure needle in contact with the block surface for 10 seconds to ensure the stability of the measurement results. After 10 seconds, read the scale value displayed by the hardness tester pointer, which is the hardness value of the test point. In order to improve the measurement accuracy, select 5 test points on different positions of the sample for measurement; the measurement steps of each test point are the same as above, and the measurement conditions of each point are consistent.

[0383] Measurement and analysis: Record the hardness value of each test point. Calculate the average value of the hardness values of the 5 test points, which is the final hardness value of the sample.

[0384] Judgment result: According to the hardness standard, the average value is evaluated in the hardness interval to obtain the hardness evaluation result.

[0385] The contact feeling evaluation result of the target block is composed of the cool feeling evaluation result, the sticky feeling evaluation result and the hardness evaluation result.

[0386] Table 13 Hardness standard evaluation table

[0387]

[0388]

[0389] As shown in Table 13, which is a hardness standard evaluation table, it shows the specific evaluation details of the hardness standard, including evaluation content, evaluation standard, evaluation grade and result.

[0390] It should be noted that hardness is an important indicator of the surface scratch resistance of plastic products, usually measured by a hardness tester. High hardness plastic products can reduce the damage of external objects to the surface and reduce the risk of scratching; low hardness plastic materials are relatively soft and easy to be affected by scratching, and are prone to indentation or scratches. For building blocks, appropriate hardness not only ensures the quality of the product, but also improves the touch, so that it is neither too hard nor too soft, thereby improving user experience and evaluation;

[0391] The test principle of the hardness test of the present embodiment is: the hardness measurement relies on the static hardness test method, which evaluates the hardness of the sample by measuring the depth of the pressure needle pressed into the surface of the sample after a specified load is applied. For the hardness measurement of the building blocks, a Shore hardness tester is often used, which is equipped with a steel pressure needle. During the test, the pressure needle is vertically pressed into the surface of the sample under the action of a preset test force until the surface of the pressure needle is in full contact with the surface of the sample. At this time, the protruding length of the needle tip relative to the surface of the pressure needle becomes an important indicator for measuring the Shore hardness, and the protruding length (i.e. L value) is inversely proportional to the hardness value, i.e. the larger the L value, the lower the hardness; on the contrary, the higher the hardness. The Shore hardness tester is divided into LX-D type (suitable for high hardness rubber) and LX-A type (suitable for medium and low hardness rubber). Since the building blocks are usually made of high hardness ABS material, it is recommended to use LX-D Shore D high hardness rubber hardness tester for measurement.

[0392] The present embodiment comprehensively evaluates the contact feel of the target building blocks from the dimensions of cool feeling, sticky feeling and hardness, covering the main hand feel problems that users may encounter when using the building blocks; by measuring the surface temperature, maximum acceleration and needle tip protruding length, the subjective feelings of stickiness and hardness are converted into objective and quantifiable indicators, improving the scientificity and accuracy of the evaluation.

[0393] ⑤ Anti-aging test:

[0394] Preparation stage: Prepare the air exchange precision aging test machine and the constant temperature and humidity test chamber, and ensure that the equipment is in good working condition. According to the test requirements, set the environmental conditions of the above two aging chambers, such as temperature, humidity, light, ozone concentration, etc., among which the hot oxygen aging condition is set to 60°C for 48 hours; the humid heat aging condition is set to 60°C, 90% humidity, 1 week; divide the target building blocks into groups, one part is placed in the air exchange precision aging test machine (simulates hot oxygen environment), the other part is placed in the constant temperature and humidity test chamber (simulates humid heat environment). Ensure that the placement positions of the target building blocks in the aging chamber are uniform to avoid test deviation caused by different positions; in addition to dividing the target building blocks into groups and placing them in the humid heat environment and the hot oxygen environment respectively, two groups of target building blocks with the same parameters can also be placed in the humid heat environment and the hot oxygen environment respectively for comparison test; it should be noted that the time parameters of the hot oxygen aging condition and the humid heat aging condition can be kept consistent, or set to different lengths according to actual needs, which depends on the environmental simulation scene corresponding to the test target, the response characteristics of the material under different aging mechanisms, and the specific time requirements of the related industry standards for this kind of test.

[0395] Test 1 is performed: start the aging oven, and perform accelerated aging treatment on the target building blocks according to the set environmental conditions. The aging time is set to seven days, and the equipment operation state and sample state need to be checked regularly during the period; after the aging treatment is completed, the first target building block and the second target building block subjected to the aging treatment are taken out from the air exchange precision aging test machine and the constant temperature and humidity test chamber respectively, to ensure that the target building blocks are not damaged during the taking-out process.

[0396] Test 2 is performed: using the full-automatic plug-pull force tester, plug-pull force tests are performed on the first target building block and the second target building block subjected to the aging according to the plug-pull force test method in the plug-pull module 10 of the embodiment.

[0397] Measurement and analysis: during the performance of Test 2, the plug-pull force data of each building block is recorded, to obtain the thermal-oxidative plug-pull force core mechanical parameters and the damp-heat plug-pull force core mechanical parameters; wherein the thermal-oxidative plug-pull force core mechanical parameters include the parameters of the lead-in section, the insertion section and the pull-out section of the first target building block, and the damp-heat plug-pull force core mechanical parameters include the parameters of the lead-in section, the insertion section and the pull-out section of the second target building block.

[0398] Determination result: according to the thermal-oxidative aging evaluation standard and the damp-heat aging evaluation standard, the damp-heat plug-pull force core mechanical parameters and the thermal-oxidative plug-pull force core mechanical parameters are respectively evaluated, to obtain the anti-aging evaluation results including the scores of the lead-in section, the insertion section and the pull-out section.

[0399] Table 14: Thermal-oxidative aging evaluation standard evaluation table

[0400]

[0401]

[0402] As shown in Table 14, the table is a thermal-oxidative aging evaluation standard evaluation table, which shows the specific evaluation details of the thermal-oxidative aging evaluation standard, including evaluation content, evaluation standard, evaluation grade and result.

[0403] Table 15: Damp-heat aging evaluation standard evaluation table

[0404]

[0405]

[0406] As shown in Table 15, the table is a damp-heat aging evaluation standard evaluation table, which shows the specific evaluation details of the damp-heat aging evaluation standard, including evaluation content, evaluation standard, evaluation grade and result.

[0407] It should be noted that in the application process of the building block toy, the aging test can be used as a supervision means. By simulating different aging environments such as thermal-oxidative aging and damp-heat aging, the aging test can not only find whether the building block toy appears discoloration, brittleness and other phenomena from the appearance, but also observe the plug-in force of the sample after aging and calculate the force value change rate. If the plug-in force change rate is too large, it means that the building block becomes very difficult to plug or too loose after aging, which greatly affects the fluency and interest of the user in playing; if the plug-in force change rate is not large, it means that the performance of the material is relatively stable during the aging process, and the product has good anti-aging property and high quality.

[0408] The test principle of the anti-aging test of the embodiment is: by simulating various natural environmental conditions, an accelerated aging test is performed on the material or product to evaluate the performance change and durability thereof in the long-term use process. The aging chamber, as a professional equipment, can simulate high temperature, low temperature, damp heat, light and ozone and other environmental factors, and accelerate the aging process of the material by precisely controlling these conditions. This method enables the aging data of the material in the natural environment to be obtained in a relatively short time.

[0409] By simulating the damp-heat environment and the thermal-oxidative environment, the embodiment can truly reflect the aging conditions that the target building block may encounter in actual use, and improves the scientificity and accuracy of the evaluation. Moreover, by the plug-in force test, the wet-heat plug-in force and the thermal-oxidative plug-in force, which are two core mechanical parameters, are extracted, and are directly related to the performance of the building block in actual use, and have clear pertinence.

[0410] The comprehensive module 20 of the embodiment comprehensively tests the target building block from three dimensions of surface characteristics, human-computer interaction and durability, ensuring the completeness of the evaluation. Moreover, each test category is further divided into specific test items, forming a test system with clear levels and reasonable structure.

[0411] In one embodiment, the construction module 30 includes a construction unit and an optimization unit.

[0412] The construction unit is configured to form a quality evaluation result of the target building block from the plug-in force evaluation result and the comprehensive performance evaluation result. The comprehensive performance evaluation result includes a surface gloss evaluation result, a stain resistance evaluation result, a holding feeling evaluation result, a contact feeling evaluation result and an anti-aging evaluation result, and each type of evaluation result contains scores obtained under different test conditions.

[0413] The optimization unit is configured to mark and record the parameters of the building block that do not meet the quality requirements in the quality evaluation result according to the preset scoring standard, and feed back to the production department or the supplier for improvement or replacement.

[0414] It should be noted that for the building block combination, the plug-in force test process needs to follow the following logic: after the building block combination completes the clamping preparation operation and is completely separated, the insertion test should be performed first, and the force value information of the lead-in section and the insertion section is collected synchronously; after the insertion operation is completed, the pull-out test is performed, and the force value data of the pull-out section is recorded. Through this complete cycle of "inserting first and then pulling out", the full-stage data of the plug-in process can be covered, meeting the complete evaluation needs of the force value curve three stages (lead-in section, insertion section, pull-out section) in the test standard, so as to ensure the comparability and effectiveness of the data between different samples.

[0415] Overall, the embodiment has the following beneficial effects:

[0416] The plug-in force evaluation of the target building block combination is performed immediately, which can capture the connection performance of the building block in the initial state, which helps to find potential defects in the design or manufacturing process; and the plug-in force evaluation is performed after a preset delay period, which can simulate the performance change of the building block after long-term use or storage, so as to evaluate its durability and stability; the combination of immediate and delayed evaluation can more comprehensively reflect the plug-in performance of the building block in the whole life cycle, which helps to find the plug-in performance decline of the building block due to material aging, structure loosening and other factors, so as to early warn potential quality problems. In addition, the comprehensive performance test covers surface property test, human-computer interaction test and durability test and other aspects, which comprehensively considers the comfort, ease of use and long-term stability of the building block in the use process from the user's point of view, ensuring the comprehensiveness and practicality of the building block quality evaluation;

[0417] In summary, the evaluation method proposed in the present application comprehensively covers the diversified performance of the building block in actual application, not only involving the key indicator of plug-in force, but also deeply considering multiple dimensions such as surface quality, holding comfort and contact feeling, thereby providing a comprehensive and multi-angle evaluation framework. By establishing a systematic test process and scoring standard, the objectivity and repeatability of the test results are ensured, and a standardized operation model for building block quality evaluation is established. In addition, the innovative comprehensive scoring system and long-term performance evaluation strategy in the present application have a pioneering significance in the industry, which not only brings new thinking angles and solutions to the industry, but also effectively makes up for the shortcomings of the prior art. This test scheme and scoring system, with its high practicality, can be directly integrated into the actual product development process and quality control system, helping manufacturers continuously improve product design and thus improving the overall experience of end users. It is worth mentioning that the present application shows excellent universality and expansion potential, and can be flexibly applied to various building block toys of different specifications and types, fully meeting the diversified needs of different manufacturers.

[0418] Embodiment three:

[0419] The embodiment of the present application provides a computer readable storage medium, the computer readable storage medium comprises a stored computer program, wherein the computer readable storage medium controls a device to execute the method for comprehensively evaluating toy block quality when the computer program runs.

[0420] The method for comprehensively evaluating toy block quality can be stored in a computer readable storage medium if the method is implemented in the form of a software function unit and used as an independent product. Based on this understanding, the present application can implement all or part of the processes of the above-mentioned embodiment methods, and can also be completed by instructing related hardware through a computer program. The computer program can be stored in a computer readable storage medium, and the computer program can implement the steps of the above-mentioned method embodiments when executed by a processor. The computer program comprises computer program code, which can be in the form of source code, object code, an executable file or some intermediate form. The computer readable medium can include any entity or device capable of carrying the computer program code, a recording medium, a U disk, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal and a software distribution medium, etc.

[0421] The above is the preferred embodiment of the present application. It should be pointed out that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements are also considered to be within the protection scope of the present application.

Claims

1. A method for comprehensively evaluating the quality of toy building blocks, characterized in that, include: The target building block assembly is inserted and pulled out immediately after the assembly is completed and after a preset delay period, respectively, to obtain the insertion and extraction force evaluation results; wherein, the target building block assembly is an insertion and extraction assembly composed of several target building blocks; The target building block is subjected to a comprehensive performance test to obtain a comprehensive performance evaluation result; wherein, the comprehensive performance test includes surface characteristic test, human-computer interaction test and durability test; The quality assessment result of the target building block is composed of the insertion and extraction force assessment result and the comprehensive performance assessment result.

2. The method for comprehensively evaluating the quality of toy building blocks as described in claim 1, characterized in that, The surface characteristic test includes a stain resistance test, the human-computer interaction test includes a grip feel test and a touch feel test, and the durability test includes an anti-aging test.

3. The method for comprehensively evaluating the quality of toy building blocks as described in claim 2, characterized in that, The grip comfort test specifically includes: The density of the target building block is calculated based on its mass in the auxiliary solution and its mass in air. The density is then assessed for compliance to obtain the density assessment result. A preset force is applied to the target block, and the test strip is controlled to roll back and forth at the edge of the target block. The cutting ratio is calculated based on the cutting length of the test strip and the length of the test strip in contact with the edge of the target block. The degree of severance is evaluated based on the cutting ratio to obtain the sharp edge evaluation result; The density assessment result and the sharp edge assessment result constitute the grip feel assessment result of the target building block.

4. The method for comprehensively evaluating the quality of toy building blocks as described in claim 2, characterized in that, The contact feel test specifically includes: A normal force is applied to a preset material, and the material is moved cyclically on the target block according to a preset speed group to obtain the maximum acceleration generated during the measurement process. The maximum acceleration is evaluated for stickiness based on its numerical value to obtain the stickiness evaluation result. Within a preset time period, the pressure needle is vertically pressed into several test points on the target block according to the test force to obtain several hardness values ​​corresponding to the needle tip protrusion length. The hardness values ​​are evaluated within a hardness range to obtain the hardness evaluation results. The contact feel evaluation result of the target building block is composed of the temperature and coolness evaluation result, the stickiness evaluation result, and the hardness evaluation result; wherein, the temperature and coolness evaluation result is obtained by evaluating the surface temperature and thermal diffusivity of the target building block.

5. The method for comprehensively evaluating the quality of toy building blocks as described in claim 2, characterized in that, The anti-aging test specifically includes: The target building blocks were placed in a humid and hot environment and a hot and oxygen environment respectively to conduct anti-aging tests, and the first target building block and the second target building block after aging treatment were obtained. Insertion and extraction force tests were performed on the first and second target building blocks to obtain anti-aging evaluation results, including the core mechanical parameters of wet heat insertion and extraction force and the core mechanical parameters of heat-oxidation insertion and extraction force.

6. The method for comprehensively evaluating the quality of toy building blocks as described in claim 2, characterized in that, The stain resistance test specifically includes: Control the drop volume of the pipette so that the droplets fall at several test points on the surface of the target building block; Numerical evaluations were performed on several contact angles between the droplet and the surface of the target building block to obtain stain resistance evaluation results.

7. The method for comprehensively evaluating the quality of toy building blocks as described in claim 1, characterized in that, The target building block assembly is inserted and removed immediately after assembly and after a preset delay, respectively, to obtain the insertion and extraction force evaluation results, specifically: The clamping position of the fully automatic insertion and extraction force testing machine is calibrated; Immediately after the target building block assembly is completed and after a preset delay period, the target building block assembly is inserted and pulled out using the fully automatic insertion and extraction force testing machine to obtain an insertion and extraction force evaluation result containing the core mechanical parameters of the insertion and extraction force. The insertion and extraction processes are controlled by the upward and downward movement of the lower clamp, respectively. The core mechanical parameters of the insertion and extraction force include the slope coefficient of the inlet section, the maximum insertion force of the insertion section, and the maximum extraction force of the extraction section.

8. The method for comprehensively evaluating the quality of toy building blocks as described in claim 7, characterized in that, The clamping position of the fully automatic insertion and extraction force testing machine is calibrated, specifically as follows: The first target building block assembly is fixed on the lower fixture of the fully automatic insertion and extraction force testing machine; wherein, the modular insertion components of the first target building block assembly are consistent with the corresponding components of the target building block in terms of geometric shape and mechanical locking characteristic parameters. Control the displacement of the upper clamp of the fully automatic insertion and extraction force testing machine, and perform a clamping operation after the upper end of the first target block assembly exceeds the positioning reference line by a specified number of grids; Adjust the position of the lower clamp to perform secondary positioning and clamping on the lower end of the first target block assembly, and control the clamping position between the specified number of scale divisions.

9. A device for comprehensively evaluating the quality of toy building blocks, characterized in that, Includes pluggable modules, synthesis modules, and building blocks; The insertion and extraction module is used to insert and extract the target block assembly immediately after its assembly is completed and after a preset delay period, respectively, to obtain an insertion and extraction force evaluation result; wherein the target block assembly is an insertion and extraction assembly composed of several target blocks. The integrated module is used to perform comprehensive performance testing on the target building block and obtain comprehensive performance evaluation results; wherein, the comprehensive performance testing includes surface characteristic testing, human-computer interaction testing, and durability testing; The construction module is used to construct the quality evaluation result of the target building block from the insertion and extraction force evaluation result and the comprehensive performance evaluation result.

10. A storage medium, characterized in that, The storage medium stores a computer program, which is called and executed by a computer to implement a method for comprehensively evaluating the quality of toy building blocks as described in any one of claims 1 to 8.

Images