A hardness testing device for testing a plurality of types of mobile phone cases

Abstract

The utility model discloses a kind of for testing hardness equipment of various types mobile phone shell, it is related to surface hardness testing technical field.The utility model includes pedestal, one end of the pedestal is provided with Z-axis drive tooling, scratch test tooling is provided on the Z-axis drive tooling, the Z-axis drive tooling is used to drive the scratch test tooling displacement along Z-axis, pressure test platform is provided on the pedestal, displacement component is provided at the pressure input end of the pressure test platform, clamping assembly is provided on the displacement component, and the clamping assembly is used to clamp mobile phone shell.The utility model mounting plate and the scratch test tooling carried thereon can be accurately and stably lifted, so that test pen can accurately contact the surface of mobile phone shell of different thickness and keep the perpendicularity of pressure direction in testing process, finally significantly improve hardness test, especially the repeated accuracy and result reliability of scratch test.

Description

Technical Field

[0001] This utility model belongs to the field of surface hardness testing technology, and specifically relates to a device for testing the hardness of various types of mobile phone cases. Background Technology

[0002] With the widespread use of mobile devices, phone cases, as important protective and decorative accessories, have become increasingly diverse in materials and manufacturing processes. Consumers and manufacturers are also placing higher demands on the surface abrasion resistance and scratch resistance (i.e., surface hardness) of phone cases. Currently, assessing the hardness of phone cases typically requires scratch testing or pressure testing to examine the mechanical properties of their coatings, platings, or base materials. In existing technologies, such tests often rely on operators using handheld hardness testers or simple benchtop testing equipment. The testing process is significantly influenced by human factors and lacks efficient, integrated dedicated equipment. Most general-purpose hardness testing equipment is not designed specifically for the shape and size of mobile phone cases, which makes clamping inconvenient and positioning difficult, making it hard to guarantee the accuracy and repeatability of test points.

[0003] There are currently no effective solutions to the problems in the relevant technologies. Utility Model Content

[0004] In view of the problems in the related technologies, this utility model proposes a device for testing the hardness of various types of mobile phone cases, so as to overcome the above-mentioned technical problems existing in the existing related technologies.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a device for testing the hardness of various types of mobile phone cases, including a base. One end of the base is provided with a Z-axis driving fixture, on which a scratch testing fixture is provided. The Z-axis driving fixture is used to drive the scratch testing fixture to move along the Z-axis. A pressure testing platform is provided on the base, and a displacement component is provided at the pressure input end of the pressure testing platform. A clamping component is provided on the displacement component, which is used to clamp the mobile phone case. The displacement component is used to drive the mobile phone case to move along the X-axis and Y-axis through the clamping component.

[0006] Furthermore, the Z-axis drive fixture includes a stand, on which a Z-axis drive threaded rod is rotatably mounted. A threaded block is threaded through and connected to the Z-axis drive threaded rod. A mounting plate is fixedly connected to one side of the threaded block. A limit slider is fixedly connected to one side of the mounting plate. The limit slider is slidably mounted on a limit guide rail. The limit guide rail is fixedly mounted on the stand.

[0007] Furthermore, the scratch testing fixture includes an L-shaped frame, which is fixedly mounted on the mounting plate. A balance platform is hinged to the upper part of the L-shaped frame. A counterweight rod is provided at both ends of the balance platform. A counterweight block is sleeved on the counterweight rod, and a test pen is snapped onto one end of the balance platform. An adjustment seat is fixedly mounted on the upper end of the L-shaped frame. An adjustment bolt is threaded onto the adjustment seat, and one end of the adjustment bolt contacts the upper surface of the balance platform.

[0008] Furthermore, the displacement component includes a base, which is fixed to the pressure input end of the pressure testing bench. The base has a slide rail groove, and an electric slide rail is fixedly installed in the slide rail groove. An electric slider is slidably installed on the electric slide rail, and the electric slider is fixedly embedded in a T-shaped drive block. A hand-operated screw is threaded through and connected to the upper part of the T-shaped drive block. One end of the hand-operated screw is rotatably installed on the positioning platform. The lower surface of the positioning platform has a sliding groove that matches the upper part of the T-shaped drive block. The sliding groove is slidably installed with the upper part of the T-shaped drive block, and the lower surface of the positioning platform is in contact with the upper surface of the base.

[0009] Furthermore, the clamping assembly includes a positioning plate that is snapped onto the positioning platform, and the positioning platform holds the phone case by a thrust plate.

[0010] This utility model has the following beneficial effects: 1. This utility model achieves highly stable vertical displacement of the scratch testing fixture through a precision mechanical structure driven by the Z-axis. Specifically, since the threaded block, mounting plate, and limiting slider are fixedly connected as a rigid whole, when the Z-axis driving threaded rod is manually rotated, its thread engagement with the threaded block converts the rotational motion into linear motion. The sliding engagement between the limiting slider and the limiting guide rail fixed to the stand strictly constrains the entire assembly to move only along the Z-axis, eliminating any possibility of wobbling or shaking. This design principle ensures that the mounting plate and the scratch testing fixture it supports can perform precise and stable lifting movements, allowing the testing pen to accurately contact the surfaces of phone cases of different thicknesses and maintain the perpendicularity of the pressure direction during testing. Ultimately, this significantly improves the repeatability and reliability of hardness testing, especially scratch testing.

[0011] 2. The balance platform of this invention acts as a lever with a hinge point as its fulcrum. By adding or removing counterweights on the counterweight rods at both ends, the torque at both ends of the lever can be changed. Tightening the adjusting bolt allows for fine adjustment of the initial horizontal angle of the balance platform, thereby achieving "zeroing" calibration of the initial contact state of the test pen. During scratch testing, adjusting this system allows the test pen to apply a preset, constant vertical pressure to the surface of the phone case. This mechanical constant pressure principle avoids the fluctuations, lags, or overshoot problems that may occur with electric or pneumatic pressure control systems. It ensures that even in long-term or multi-point testing, the loading conditions for each scratch are highly consistent, thereby greatly improving the comparability and accuracy of test data and flexibly adapting to the pressure requirements of different testing standards.

[0012] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the utility model embodiments, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is one of the three-dimensional structural diagrams of this utility model; Figure 2 This is the second three-dimensional structural diagram of the present invention; Figure 3 This is a structural diagram of the positioning platform of this utility model; Figure 4 This is an exploded view of the internal structure of the positioning platform of this utility model.

[0015] The attached diagram lists the components represented by each number as follows: 1. Base; 2. Z-axis drive fixture; 201. Stand; 202. Z-axis drive threaded rod; 203. Threaded block; 204. Mounting plate; 205. Limiting slider; 206. Limiting guide rail; 3. Scratch testing fixture; 301. L-shaped frame; 302. Balance table; 303. Counterweight rod; 304. Counterweight block; 305. Test pen; 306. Adjusting seat; 307. Adjusting bolt; 4. Pressure testing table; 5. Displacement assembly; 501. Base; 502. Slide rail groove; 503. Electric slide rail; 504. Electric slider; 505. T-shaped drive block; 506. Hand-operated screw; 507. Positioning table; 508. Slide groove; 6. Clamping assembly; 601. Positioning plate; 602. Thrust plate. Detailed Implementation

[0016] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0017] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements 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 the utility model.

[0018] Please see Figures 1-4 As shown, this utility model is a device for testing the hardness of various types of mobile phone cases, including a base 1. A Z-axis driving fixture 2 is provided at one end of the base 1. A scratch testing fixture 3 is provided on the Z-axis driving fixture 2. The Z-axis driving fixture 2 is used to drive the scratch testing fixture 3 to move along the Z-axis. A pressure testing platform 4 is provided on the base 1. A displacement component 5 is provided at the pressure input end of the pressure testing platform 4. A clamping component 6 is provided on the displacement component 5. The clamping component 6 is used to clamp the mobile phone case, and the displacement component is used to drive the mobile phone case to move along the X-axis and Y-axis through the clamping component 6.

[0019] In one embodiment, the Z-axis drive fixture 2 includes a stand 201, on which a Z-axis drive threaded rod 202 is rotatably mounted. A threaded block 203 is threaded through and connected to the Z-axis drive threaded rod 202. A mounting plate 204 is fixedly connected to one side of the threaded block 203. A limit slider 205 is fixedly connected to one side of the mounting plate 204. The limit slider 205 is slidably mounted on a limit guide rail 206. The limit guide rail 206 is fixedly mounted on the stand 201.

[0020] Since the threaded block 203 and the limiting slider 205 are both fixedly mounted on the mounting plate 204, the three are integrated as a whole. When the operator rotates the Z-axis drive threaded rod 202 by hand, the Z-axis drive threaded rod 202 drives the threaded block 203, which meshes with it, to move along the Z-axis through the sliding engagement between the limiting slider 205 and the limiting guide rail 206. The sliding engagement between the limiting slider 205 and the limiting guide rail 206, through the mounting plate 204, limits the degree of freedom of the threaded block 203, allowing the threaded block 203 to displace along the Z-axis when the Z-axis drive threaded rod 202 rotates. This, in turn, causes the mounting plate 204 to move the scratch testing fixture 3 along the Z-axis to test mobile phone cases of different heights, improving the flexibility of the test.

[0021] In addition, in practical applications, there is sufficient damping between the Z-axis drive threaded rod 202 and the stand 201 to prevent the Z-axis drive threaded rod 202 from rotating when there is no external force intervention from the operator.

[0022] In one embodiment, the scratch testing fixture 3 includes an L-shaped frame 301, which is fixedly mounted on the mounting plate 204. A balance platform 302 is hinged to the upper part of the L-shaped frame 301. A counterweight rod 303 is provided at both ends of the balance platform 302. A counterweight block 304 is sleeved on the counterweight rod 303. A test pen 305 is snapped onto one end of the balance platform 302. An adjusting seat 306 is fixedly mounted on the upper end of the L-shaped frame 301. An adjusting bolt 307 is threadedly connected to the adjusting seat 306. One end of the adjusting bolt 307 contacts the upper surface of the balance platform 302.

[0023] When the Z-axis drive fixture 2 brings the test pen into contact with the phone case, counterweights 304 are first placed on both ends of the counterweight rods 303. Since the right side of the balance platform 302 is longer than the left side, the balance platform 302 will rotate around the hinge point, resulting in a left-high, right-low effect. When it comes into contact with the phone case, it will exert pressure on the phone case. Therefore, by rotating the adjusting bolt 307, the adjusting screw 307 is pressed downwards against the left side of the balance platform 302, keeping the balance platform 302 balanced and preventing the test pen from causing pressure on the phone case before testing. When the pressure and displacement component drives the phone case to move along the X and Y axes for pressure detection via the clamping component 5, the adjusting bolt 307 is turned upwards to apply pressure to the phone case on the right side of the balance platform 302. When the reading on the pressure test platform 4 reaches the required value, the operation of the adjusting bolt 307 is stopped, and only the displacement component drives the phone case to move via the clamping component 5, so that the test pen 305 slides relative to the phone case to detect the hardness of the phone case. The detection standard is to observe whether scratches are generated on the surface of the phone case.

[0024] The extension length of the adjusting bolt 307 can be changed by turning it, thereby pushing or releasing the balance platform 302 to cause a slight change in tilt angle around the hinge point. The direct purpose of this operation is to zero-calibrate or fine-tune the initial contact state of the test pen 305, ensuring that the tip of the test pen 305 can accurately contact the surface of the phone case to be tested in a completely vertical state without pre-pressure before the test begins. Based on this, by adding or removing counterweights 304 on the counterweight rod 303 at different positions, the calibrated pressure value of the test pen 305 on the surface of the phone case can be precisely set and maintained. The combined effect of this lever balance and fine-tuning structure ensures that the test pen 305 can contact the sample surface with a constant and settable pressure, achieving standardized scratch testing, avoiding test errors caused by pressure fluctuations, and improving the repeatability and comparability of test results. In addition, in specific applications, the test pen 305 is installed by a snap-fit ​​method, which facilitates the replacement of test heads of different materials or specifications according to the test standards.

[0025] In one embodiment, the displacement component 5 includes a base 501 fixed to the pressure input end of the pressure testing bench 4. A slide rail groove 502 is provided on the base 501, and an electric slide rail 503 is fixedly installed within the slide rail groove 502. An electric slider 504 is slidably installed on the electric slide rail 503. The electric slider 504 is fixedly embedded in a T-shaped drive block 505. A hand-operated screw 506 is threaded through and threaded onto the upper part of the T-shaped drive block 505. One end of the hand-operated screw 506 is rotatably mounted on the positioning platform 507. A groove 508 adapted to the upper part of the T-shaped drive block 505 is provided on the lower surface of the positioning platform 507. The groove 508 is slidably installed with the upper part of the T-shaped drive block 505, and the lower surface of the positioning platform 507 is in contact with the upper surface of the base 501.

[0026] When the electric slide rail 503 is working, it can drive the electric slider 504 and its connected T-shaped drive block 505 to move along the slide rail groove 502, thereby enabling it to drive the mobile phone case on the positioning stage 507 to move along the Z-axis and slide relative to the test pen 305 to complete the test. By rotating the hand screw 506, the upper part of the T-shaped drive block 505 can be driven to make a slight movement within the groove 508 of the positioning table 507. Because the other end of the hand-operated screw 506 is rotatably mounted on the positioning stage 507, the entire positioning stage 507 is precisely translated and adjusted relative to the base 501, achieving high-precision positioning of the phone case test points in the XY plane. Combined with the Z-axis input of the pressure testing stage 4, hardness testing of any point on the surface of the phone case can be completed. In addition, the lower surface of the positioning stage 507 is always in contact with the upper surface of the base 501, ensuring stability and no warping during movement.

[0027] In one embodiment, the clamping component 6 includes a positioning plate 601, which is snapped onto the positioning stage 507, and the positioning stage 507 clamps the phone case via a thrust plate 602.

[0028] By placing the phone case on the positioning stage 507 and initially positioning and limiting it by the positioning plate 601, and then applying lateral pressure by tightening the thrust plate 602 (which can be tightened by screws or other means), the phone case is firmly clamped. This clamping method is simple in structure and easy to operate, effectively adapting to phone cases of different sizes and shapes, and ensuring that the phone case does not move or loosen during subsequent scratch or pressure tests. This provides a stable and reliable clamping foundation for testing, guaranteeing the accuracy and consistency of test data. Furthermore, in specific applications, the positioning plate 601 can be replaced according to the shape of the phone case, enhancing the versatility of the equipment.

[0029] In summary: 2. This utility model achieves highly stable vertical displacement of the scratch testing fixture 3 through the precision mechanical structure of the Z-axis driven fixture 2. Specifically, since the threaded block 203, mounting plate 204, and limiting slider 205 are fixedly connected as a rigid whole, when the Z-axis driven threaded rod 202 is manually rotated, its thread engagement with the threaded block 203 converts the rotational motion into linear motion. The sliding engagement between the limiting slider 205 and the limiting guide rail 206 fixed on the stand 201 strictly constrains the entire assembly to move only along the Z-axis, eliminating any possibility of wobbling or shaking. This design principle ensures that the mounting plate 204 and the scratch testing fixture 3 it carries can perform precise and stable lifting movements, allowing the testing pen 305 to accurately contact the surface of mobile phone cases of different thicknesses and maintain the perpendicularity of the pressure direction during testing. Ultimately, this significantly improves the repeatability and reliability of hardness testing, especially scratch testing. 3. The balance platform 302 acts as a lever with its hinge point as the fulcrum. By adding or removing counterweights 304 from the counterweight rods 303 at both ends, the torque at both ends of the lever can be changed. Tightening the adjusting bolt 307 allows for fine adjustment of the initial horizontal angle of the balance platform 302, thereby achieving "zeroing" calibration of the initial contact state of the test pen 305. During scratch testing, adjusting this system allows the test pen 305 to apply a preset, constant vertical pressure to the surface of the phone case. This mechanical constant pressure principle avoids the fluctuations, lags, or overshoot problems that may occur with electric or pneumatic pressure control systems. It ensures that even in long-term or multi-point testing, the loading conditions for each scratch are highly consistent, thereby greatly improving the comparability and accuracy of the test data and flexibly adapting to the pressure requirements of different testing standards.

[0030] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the 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.

[0031] The preferred embodiments of the utility model disclosed above are merely illustrative of the utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize it. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A device for testing the hardness of various types of mobile phone cases, comprising a base (1), characterized in that: One end of the base (1) is provided with a Z-axis driving fixture (2), and a scratch testing fixture (3) is provided on the Z-axis driving fixture (2). The Z-axis driving fixture (2) is used to drive the scratch testing fixture (3) to move along the Z-axis. A pressure testing platform (4) is provided on the base (1). A displacement component (5) is provided at the pressure input end of the pressure testing platform (4). A clamping component (6) is provided on the displacement component (5). The clamping component (6) is used to clamp the mobile phone case, and the displacement component is used to drive the mobile phone case to move along the X-axis and Y-axis through the clamping component (6).

2. The device for testing the hardness of various types of mobile phone cases according to claim 1, characterized in that, The Z-axis drive fixture (2) includes a stand (201), on which a Z-axis drive threaded rod (202) is rotatably mounted. The Z-axis drive threaded rod (202) passes through and is threadedly connected to a threaded block (203). A mounting plate (204) is fixedly connected to one side of the threaded block (203). A limit slider (205) is fixedly connected to one side of the mounting plate (204). The limit slider (205) is slidably mounted on a limit guide rail (206). The limit guide rail (206) is fixedly mounted on the stand (201).

3. The device for testing the hardness of various types of mobile phone cases according to claim 2, characterized in that, The scratch testing fixture (3) includes an L-shaped frame (301), which is fixedly installed on the mounting plate (204). A balance platform (302) is hinged to the upper part of the L-shaped frame (301). A counterweight rod (303) is provided at both ends of the balance platform (302). A counterweight block (304) is sleeved on the counterweight rod (303). A test pen (305) is snapped onto one end of the balance platform (302). An adjustment seat (306) is fixedly installed on the upper end of the L-shaped frame (301). An adjustment bolt (307) is threaded onto the adjustment seat (306). One end of the adjustment bolt (307) is in contact with the upper surface of the balance platform (302).

4. The device for testing the hardness of various types of mobile phone cases according to claim 3, characterized in that, The displacement assembly (5) includes a base (501), which is fixed to the pressure input end of the pressure testing bench (4). A slide rail groove (502) is provided on the base (501), and an electric slide rail (503) is fixedly installed within the slide rail groove (502). An electric slider (504) is slidably installed on the electric slide rail (503), and the electric slider (504) is fixedly embedded in a T-shaped drive block (505). A hand-operated screw (506) is threaded through and connected to the upper part of the 05. One end of the hand-operated screw (506) is rotatably mounted on the positioning platform (507). The lower surface of the positioning platform (507) is provided with a sliding groove (508) that is adapted to the upper part of the T-shaped drive block (505). The sliding groove (508) is slidably mounted on the upper part of the T-shaped drive block (505). The lower surface of the positioning platform (507) is in contact with the upper surface of the base (501).

5. A device for testing the hardness of various types of mobile phone cases according to claim 4, characterized in that, The clamping assembly (6) includes a positioning plate (601), which is snapped onto the positioning platform (507), and the positioning platform (507) clamps the mobile phone case by a thrust plate (602).

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