Leather color fastness testing device

Abstract

The utility model discloses a leather color fastness testing arrangement, include: base, install fixed bolster, and the end of fixed bolster is installed with felt block, sliding seat, along horizontal direction sliding setting in base, the upper surface of sliding seat can place leather, and the felt block is located the top of leather and is in contact with leather, and the upper surface of sliding seat is inclined plane and extends downward to the side of base, fixed subassembly, connect in sliding seat and be used for to leather fixed, drive subassembly, install in base, and drive subassembly are used for drive sliding seat and reciprocate in the horizontal of inclination to the inclined plane upper, to drive the periodic change of friction between felt block and leather. Through the inclined plane sliding seat and drive subassembly cooperation, utilize gravity component force and horizontal reciprocating motion to make felt block and leather friction periodic change, simulate real dynamic friction scene, and then improve test accuracy and the correlation in actual use.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and in particular to a leather color fastness testing device. Background Technology

[0002] In the luggage manufacturing industry, especially in the case and suitcase sector, leather is a commonly used high-end material, highly favored for its good texture and durability. Among these factors, leather colorfastness is one of the key indicators for measuring the quality of leather in suitcases. It directly relates to the suitcase's ability to maintain its appearance and overall quality during use. Specifically, leather colorfastness refers to the leather's ability to resist color fading, transfer, or discoloration during use. For example, in daily use of a suitcase, the leather surface may frequently rub against clothing, handles, and other luggage. If the leather colorfastness is poor, it is prone to fading, which not only affects the suitcase's appearance but may also contaminate other items that come into contact with it.

[0003] In related equipment testing, a fixed pressure vertical friction method is often used, that is, a felt block is rubbed perpendicularly to the leather surface with a constant pressure. For example, a friction cloth or felt block is repeatedly rubbed perpendicularly to the leather surface with a constant pressure, and then the color fastness is evaluated by observing the change in the color of the leather surface.

[0004] However, in actual use of suitcases, the contact pressure between the leather and the ground, handles, and other friction media changes with the movement and tilting of the suitcase, resulting in dynamic fluctuations in friction. Most existing testing devices do not take this factor into account and cannot accurately simulate such real dynamic friction conditions. Therefore, the test results deviate from the color fastness performance of suitcases in actual use, making it difficult to meet the needs of suitcase manufacturers, quality inspection agencies, and others for accurate evaluation of leather color fastness. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a leather color fastness testing device, which uses a sloping sliding seat in conjunction with a drive component to utilize the component of gravity and horizontal reciprocating motion to cause periodic changes in the frictional force between the felt block and the leather, simulating a real dynamic friction scenario, thereby improving the accuracy of the test and its relevance to actual use.

[0006] The leather color fastness testing device according to an embodiment of the present invention includes: The base is equipped with a fixed bracket, and a felt block is installed at the end of the fixed bracket; A sliding seat is slidably disposed on the base in a horizontal direction. The upper surface of the sliding seat can hold leather. The felt block is located above the leather and abuts against the leather. The upper surface of the sliding seat is inclined and extends downward toward one side of the base. A fixing component, connected to the sliding seat and used to fix the leather; A drive assembly, mounted on the base, is used to drive the sliding seat to reciprocate horizontally in the direction of inclination to the inclined surface, so as to drive the friction force between the felt block and the leather to change periodically.

[0007] The leather color fastness testing device according to the embodiments of this utility model has at least the following beneficial effects: the fixed bracket mounted on the base is equipped with a felt block, the sliding seat can slide horizontally and its upper surface is an inclined plane extending downward toward one side of the base, the leather is placed on the upper surface of the inclined plane, and the felt block is located above the leather and abuts against it. This structure allows the component of gravity along the inclined plane to provide a basic positive pressure between the leather and the felt block; and the driving component drives the sliding seat to move horizontally and reciprocally upward along the inclined plane. During this process, the horizontal movement of the sliding seat and the component of gravity are superimposed, dynamically changing the contact between the leather and the felt block. The magnitude of the positive pressure causes the friction between the two to change periodically, more realistically simulating the friction fluctuations caused by dynamic contact in actual use, such as the dynamic changes in the friction between the leather and the ground or other objects during the dragging of a suitcase. This improves the correlation between the test results and actual use scenarios. In addition, the leather is placed on the upper surface of the sliding seat and fixed by the fixing components, which effectively prevents the leather from shifting or deviating due to friction during the test. This ensures the stability of the contact area between the felt block and the leather, avoids test errors caused by leather displacement, and improves the accuracy of the test results.

[0008] According to some embodiments of the present invention, a leather color fastness testing device is provided on one side of the base, and the central control screen is used to integrate and control the drive components.

[0009] According to some embodiments of the present invention, in the leather color fastness testing device, the inclined surface is tilted downward toward the side of the central control screen, and the driving component is used to drive the sliding seat to move horizontally toward or away from the side of the central control screen.

[0010] According to some embodiments of the present invention, the angle between the inclined plane and the horizontal plane is A, which satisfies 1°≤A≤5°.

[0011] According to some embodiments of the present invention, the leather color fastness testing device satisfies: A=3°.

[0012] According to some embodiments of the present invention, the leather color fastness testing device includes a sliding seat comprising a base and an adjusting body. The inclined surface is disposed on the upper surface of the adjusting body, and the adjusting body is horizontally and adjustablely mounted on the base in an inclined direction relative to the inclined surface to adjust the contact position between the felt block and the leather.

[0013] According to some embodiments of the present invention, the leather color fastness testing device has a limiting groove that extends through the sliding seat in the direction of movement on the upper side of the substrate, and a limiting part is provided on the lower side of the adjusting body, the limiting part being slidably disposed in the limiting groove.

[0014] According to some embodiments of the present invention, the leather color fastness testing device has an air-proof hole and a threaded hole on the upper surface of the adjusting body. The air-proof hole is connected to the threaded hole, and a push screw is screwed into the threaded hole to push against the upper surface of the base and drive the limiting part to press against and fix to the groove wall of the limiting groove. The air-proof hole can accommodate the screw head of the push screw.

[0015] According to some embodiments of the present invention, the leather color fastness testing device includes a fixing component comprising multiple magnets, and the adjusting body is a magnetic component. The magnets and the adjusting body are magnetically attracted and fixed to fix the leather.

[0016] According to some embodiments of the present invention, the leather color fastness testing device has a limiting hole on the upper surface of the adjusting body. The depth of the limiting hole is less than the thickness of the magnet, so that the magnet part can extend into the limiting hole.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of the leather color fastness testing device according to an embodiment of the present invention; Figure 2 This is a partial explosion diagram of the leather color fastness testing device according to an embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the application of the leather color fastness testing device according to an embodiment of the present invention after leather is loaded.

[0019] Explanation of icon numbers: Base 100; Fixing bracket 110; Felt block 111; Central control screen 120; Sliding seat 200; base 210; limiting groove 2101; adjusting body 220; clearance hole 2201; threaded hole 2202; limiting hole 2203; inclined surface 221; limiting part 222; Fixing component 300; Magnet 310; Driver component 400; Leather 500. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] In the luggage manufacturing industry, especially in the case and suitcase sector, leather is a commonly used high-end material, highly favored for its good texture and durability. Among these factors, leather colorfastness is one of the key indicators for measuring the quality of leather in suitcases. It directly relates to the suitcase's ability to maintain its appearance and overall quality during use. Specifically, leather colorfastness refers to the leather's ability to resist color fading, transfer, or discoloration during use. For example, in daily use of a suitcase, the leather surface may frequently rub against clothing, handles, and other luggage. If the leather colorfastness is poor, it is prone to fading, which not only affects the suitcase's appearance but may also contaminate other items that come into contact with it.

[0026] In related equipment testing, a fixed pressure vertical friction method is often used, that is, a felt block is rubbed perpendicularly to the leather surface with a constant pressure. For example, a friction cloth or felt block is repeatedly rubbed perpendicularly to the leather surface with a constant pressure, and then the color fastness is evaluated by observing the change in the color of the leather surface.

[0027] However, in actual use of suitcases, the contact pressure between the leather and the ground, handles, and other friction media changes with the movement and tilting of the suitcase, resulting in dynamic fluctuations in friction. Most existing testing devices do not take this factor into account and cannot accurately simulate such real dynamic friction conditions. Therefore, the test results deviate from the color fastness performance of suitcases in actual use, making it difficult to meet the needs of suitcase manufacturers, quality inspection agencies, and others for accurate evaluation of leather color fastness.

[0028] Therefore, such as Figures 1 to 3As shown, the leather color fastness testing device proposed in this utility model includes a base 100, a fixed bracket 110 mounted on the base 100, a sliding seat 200 slidably disposed on the base 100 in a horizontal direction, a fixing component 300 connected to the sliding seat 200 and used to fix the leather 500, and a driving component 400 mounted on the base 100. A felt block 111 is mounted at the end of the fixed bracket 110. The upper surface of the sliding seat 200 can hold the leather 500, and the felt block 111 is located above and abuts against the leather 500. Specifically, the upper surface of the sliding seat 200 is an inclined surface 221 extending downward toward one side of the base 100. The driving component 400 drives the sliding seat 200 to reciprocate horizontally upwards at an angle relative to the inclined surface 221, thereby causing the frictional force between the felt block 111 and the leather 500 to change periodically. For example, the drive assembly 400 is a common linear module, employing a motor and lead screw structure. The sliding seat 200 is slidably mounted on the base 100 via a guide rail slider structure, and the linear module drives the sliding seat 200 to move. It should be noted that the fixed bracket 110 mounted on the base 100 is equipped with a felt block 111. The sliding seat 200 can slide horizontally, and its upper surface is an inclined plane 221 extending downwards towards one side of the base 100. The leather 500 is placed on the upper surface of the inclined plane 221, and the felt block 111 is located above and abuts against the leather 500. This structure allows the component of gravity along the inclined plane 221 to provide a basic positive pressure between the leather 500 and the felt block 111. Furthermore, the drive assembly 400 drives the sliding seat 200 to reciprocate horizontally upwards along the inclined plane 221. During this process, the horizontal movement of the sliding seat 200 and the component of gravity are superimposed, dynamically changing the pressure between the leather 500 and the felt block 111. The magnitude of the contact force causes the friction between the two to change periodically, more realistically simulating the friction fluctuations of leather 500 due to dynamic contact in actual use, such as the dynamic changes in the friction between leather 500 and the ground or other objects during the dragging of a suitcase, thus improving the correlation between the test results and actual use scenarios. In addition, the leather 500 is placed on the upper surface of the sliding seat 200 and fixed by the fixing component 300, effectively preventing the leather 500 from shifting or deviating due to friction during the test, ensuring the stability of the contact area between the felt block 111 and the leather 500, avoiding test errors caused by the displacement of the leather 500, and improving the accuracy of the test results.

[0029] Reference Figure 1In some embodiments of this utility model, a central control screen 120 is provided on one side of the base 100. The central control screen 120 is used to integrate the control drive component 400, and the integrated control interface significantly improves the intelligence and ease of operation of the device. In application, the central control screen 120 can display the operating status of the drive component 400 in real time, such as current displacement, speed feedback, and other information, and supports preset test programs, such as the standard number of friction cycles corresponding to different color fastness grades, further ensuring the standardization and repeatability of the test process, and providing technical support for efficient testing in laboratories or production lines. Furthermore, the inclined surface 221 is tilted downward toward the side of the central control screen 120, and the drive component 400 is used to drive the sliding seat 200 to move horizontally along the side toward or away from the central control screen 120. It can be understood that the central control screen 120, as the core of operation, usually requires frequent observation and interaction by the test subject. Associating the tilt direction of the inclined surface 221 with the position of the central control screen 120 makes the horizontal movement direction of the sliding seat 200 naturally correspond to the operator's observation angle. For example, when the sliding seat 200 moves away from the central control screen 120, it corresponds to horizontal movement at the lower end of the inclined plane 221; when it moves closer to the central control screen 120, it corresponds to horizontal movement at the upper end of the inclined plane 221. This layout not only conforms to ergonomic design, but also allows testers to observe the contact state between the leather 500 and the felt block 111 in real time through the central control screen 120, such as whether the friction area has shifted or whether the leather 500 is securely fixed. In addition, the user is generally positioned in front of the central control screen 120 for operation. At this time, the user is facing the inclined plane 221, which allows for convenient placement of the leather 500 on the inclined plane 221, improving the ease of material loading. Optionally, the angle between the inclined plane 221 and the horizontal plane is A, satisfying 1°≤A≤5°. This ensures that the component of gravity effectively regulates the dynamic changes in friction while avoiding test failures or operational difficulties caused by excessively large or small inclination angles. If the tilt angle is too small, such as less than 1°, the component of gravity along the inclined plane 221 is too weak, making it difficult to significantly affect the normal pressure of the leather 500 and the felt block 111. The drive component 400 needs to apply a larger horizontal force to achieve a significant fluctuation in friction, which not only increases energy consumption and mechanical wear but may also lead to insufficient variation in normal pressure, failing to realistically simulate dynamic friction scenarios. If the tilt angle is too large, such as exceeding 5°, the component of gravity is too strong and will dominate the main part of the normal pressure, reducing the flexibility of the drive component 400's adjustment. Even slight horizontal movement can cause drastic changes in normal pressure, and the leather 500 may slip or experience uneven local pressure due to excessive tilting, affecting the stability and accuracy of the test. In some embodiments of this utility model, after targeted optimization for the color fastness testing requirements of the leather 500 and multiple test verifications, it is preferred that A=3°. In response, the 3° gravitational component will not excessively dominate the positive pressure. The drive component 400 can still flexibly adjust the amplitude of friction fluctuations through precise control of horizontal movement, while avoiding the problem of edge lifting or local stress concentration caused by excessive tilting of the leather 500.

[0030] Refer to Figure 2In some embodiments of this utility model, the sliding seat 200 includes a base 210 and an adjusting body 220. An inclined surface 221 is disposed on the upper surface of the adjusting body 220. The adjusting body 220 is horizontally adjustable and mounted on the base 210 with the inclined surface 221 inclined upwards, so as to adjust the contact position between the felt block 111 and the leather 500. It can be understood that the tester can adjust the position of the adjusting body 220 along the movement direction of the sliding seat 200 as needed, thereby changing the contact point between the felt block 111 and the leather 500. For example, by adjusting the sliding seat 200 along the side facing the central control screen 120, the distance between the inclined surface 221 and the felt block 111 is reduced, the friction between the felt block 111 and the leather 500 is increased, and a higher initial median value of friction can be set. When the sliding seat 200 is driven to reciprocate by the driving component 400, the periodic curve of the friction force is shifted upwards as a whole. For example, by adjusting the sliding seat 200 along the side away from the central control screen 120, the distance between the inclined surface 221 and the felt block 111 is increased, reducing the friction between the felt block 111 and the leather 500. This allows for setting a lower initial median friction value. When the sliding seat 200 is driven to reciprocate by the drive component 400, the overall periodic curve of the friction force shifts downward. It should be noted that by changing the friction force variation characteristics, the testing standards for different application scenarios of the leather 500 can be expanded. Specifically, in some embodiments of this utility model, the upper side of the base 210 is provided with a limiting groove 2101 that extends through the sliding seat 200 in the direction of movement, and the lower side of the adjusting body 220 is provided with a limiting part 222, which is slidably disposed in the limiting groove 2101. Understandably, the cooperation between the limiting groove 2101 and the limiting part 222 provides a clear guiding path for the horizontal movement of the adjusting body 220, ensuring that the adjusting body 220 can only move linearly along the direction of movement of the sliding seat 200. Simultaneously, the sliding fit structure reduces adjustment resistance, allowing testers to easily push the adjusting body 220 to the target position manually or with simple tools. The operation is simple and will not damage the base 210 or the structure of the adjusting body 220 during the adjustment process. Furthermore, the upper surface of the adjusting body 220 is provided with a clearance hole 2201 and a threaded hole 2202. The clearance hole 2201 communicates with the threaded hole 2202, and a push screw is screwed into the threaded hole 2202 to push against the upper surface of the base 210 and drive the limiting part 222 to press and fix against the groove wall of the limiting groove 2101. The clearance hole 2201 can accommodate the screw head of the push screw. A simple and reliable locking structure achieves stable fixation of the adjusting body 220 after position adjustment. After the tester adjusts the adjusting body 220 to the target position through the limiting groove 2101 and the limiting part 222, the screw head can be pressed against the upper surface of the base 210 by rotating the push screw, thereby pushing the adjusting body 220 as a whole to move towards the groove wall of the limiting groove 2101, and finally making the limiting part 222 fit tightly against the groove wall of the limiting groove 2101.Without the need for complex mechanical locks or additional fixing components, the structure is simple and inexpensive, while providing sufficient fixing force to ensure that the adjusting body 220 will not shift during the test due to the reciprocating motion of the base 210 or the reaction force of friction, thus ensuring the stability of the contact position between the felt block 111 and the leather 500. Furthermore, the design of the clearance hole 2201 cleverly avoids the problem of screw heads protruding from the upper surface of the adjusting body 220, which could potentially interfere with the placement of the leather 500 or the contact of the felt block 111. This improves the flatness of the device surface and prevents the potential influence of screws on the testing process, further ensuring the accuracy and reliability of the test.

[0031] Refer to Figure 2 and Figure 3 In some embodiments of this utility model, the fixing component 300 includes multiple magnets 310, and the adjusting body 220 is a magnetic component. The magnets 310 and the adjusting body 220 are magnetically attracted and fixed to fix the leather 500. It is easy to understand that the magnetic attraction fixing method is simple to operate and has moderate attraction force. It can prevent the leather 500 from shifting during friction, and will not deform the leather 500 due to excessive attraction. It is particularly suitable for testing high-grade leathers 500 commonly used in luggage and other bag industries, such as genuine leather and coated leather, effectively ensuring the original state and contact stability of the leather 500 during testing. Further, referring to... Figure 2 The upper surface of the adjusting body 220 is provided with a limiting hole 2203. The depth of the limiting hole 2203 is less than the thickness of the magnet 310, so that part of the magnet 310 can extend into the limiting hole 2203, further improving the stability and positioning accuracy of the magnet 310. It should be noted that the limiting hole 2203 provides a pre-positioning groove for the magnet 310. When the tester places the magnet 310, part of the magnet 310 can be embedded into the limiting hole 2203. This design not only prevents the magnet 310 from sliding freely on the surface of the adjusting body 220, but also better presses and fixes the leather 500.

[0032] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A leather color fastness testing device, characterized in that, include: The base is equipped with a fixed bracket, and a felt block is installed at the end of the fixed bracket; A sliding seat is slidably disposed on the base in a horizontal direction. The upper surface of the sliding seat can hold leather. The felt block is located above the leather and abuts against the leather. The upper surface of the sliding seat is inclined and extends downward toward one side of the base. A fixing component, connected to the sliding seat and used to fix the leather; A drive assembly, mounted on the base, is used to drive the sliding seat to reciprocate horizontally in the direction of inclination to the inclined surface, so as to drive the friction force between the felt block and the leather to change periodically.

2. The leather color fastness testing device according to claim 1, characterized in that: A central control screen is provided on one side of the base, and the central control screen is used to integrate and control the drive components.

3. The leather color fastness testing device according to claim 2, characterized in that: The inclined surface tilts downward toward the side of the central control screen, and the driving component is used to drive the sliding seat to move horizontally toward or away from the side of the central control screen.

4. The leather color fastness testing device according to claim 1, characterized in that: The angle between the inclined plane and the horizontal plane is A, which satisfies 1°≤A≤5°.

5. The leather color fastness testing device according to claim 4, characterized in that: Satisfies: A=3°.

6. The leather color fastness testing device according to claim 1, characterized in that: The sliding seat includes a base and an adjusting body. The inclined surface is disposed on the upper surface of the adjusting body. The adjusting body is horizontally and adjustablely mounted on the base in an inclined direction relative to the inclined surface to adjust the contact position between the felt block and the leather.

7. The leather color fastness testing device according to claim 6, characterized in that: The upper side of the base is provided with a limiting groove that extends through the sliding seat in the direction of movement, and the lower side of the adjusting body is provided with a limiting part that is slidably disposed in the limiting groove.

8. The leather color fastness testing device according to claim 7, characterized in that: The upper surface of the adjusting body is provided with a clearance hole and a threaded hole. The clearance hole communicates with the threaded hole. A push screw is screwed into the threaded hole to push against the upper surface of the base and drive the limiting part to press against and fix to the groove wall of the limiting groove. The clearance hole can accommodate the screw head of the push screw.

9. The leather color fastness testing device according to claim 6, characterized in that: The fixing component includes multiple magnets, and the adjusting body is a magnetic component. The magnets and the adjusting body are magnetically attracted and fixed to fix the leather.

10. The leather color fastness testing device according to claim 9, characterized in that: The upper surface of the adjusting body is provided with a limiting hole, the depth of which is less than the thickness of the magnet, so that the magnet part can extend into the limiting hole.

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