Compression resistance detection device suitable for mobile phone screen

Abstract

The invention relates to the technical field of compression resistance detection, in particular to a compression resistance detection device suitable for a mobile phone screen. The compression resistance detection device suitable for the mobile phone screen comprises a frame, a controller, a supporting frame, a motor, a gear set, a lead screw set, a pressure head, a supporting block, a rotating frame, a carrier roller and a control assembly, the controller is installed on the right side wall of the frame, the supporting frame is connected to the middle of the top of the frame, and the motor is installed on the top of the supporting frame. Dynamic outward movement of a screen bottom supporting force acting line is achieved through a rotating structure of the rotating frame and the carrier roller in cooperation with a buffering system of the piston cylinder, when a pressure head is loaded, the carrier roller automatically adjusts the supporting position along with screen deformation, the edge supporting force evenly moves outwards along with pressure increase, the edge local overload risk is effectively reduced, and the service life is prolonged. And compared with a traditional fixed supporting detection mode, detection data is closer to the actual compressive strength mean value of the screen.

Description

Technical Field

[0001] The present invention relates to the field of pressure resistance detection technology, and in particular to a pressure resistance detection device suitable for mobile phone screens. Background Art

[0002] In smartphone screen manufacturing, compressive strength is a key performance indicator for measuring screen quality, directly impacting the end product's durability and user experience. Currently, the industry generally uses static support loading to test the compressive strength of mobile phone screens. Traditional testing equipment typically consists of a fixed support platform and a vertical pressure-loading mechanism. During the test, the screen edge is fixedly supported, and a pressure head applies a vertical load from above until a preset threshold is reached or the screen cracks.

[0003] However, this type of traditional testing solution has significant technical flaws: on the one hand, the fixed support structure leads to rigid constraints on the edges of the screen. When pressure is loaded, stress concentration is prone to occur in the edge area, causing the screen to often break first in the edge area, and failing to truly reflect the overall compressive strength of the screen; on the other hand, the static support method cannot simulate the dynamic stress state of the screen in actual usage scenarios, such as the non-uniform load on the screen when a handheld device falls, resulting in a low degree of consistency between the test data and the actual application scenario.

[0004] In addition, existing detection devices generally lack a dynamic adjustment mechanism for the distribution of screen support force. When the screen is compressed and deformed, the bottom support force cannot be adjusted synchronously with the deformation, causing the line of action of the support force to always be concentrated in the initial contact area, further aggravating the problem of local overload. Summary of the Invention

[0005] In order to overcome the shortcomings mentioned in the background technology, the technical problem is: to provide a pressure resistance detection device suitable for mobile phone screens.

[0006] The technical solution is as follows: A pressure resistance detection device suitable for mobile phone screens, including a frame, a controller, a support frame, a motor, a gear group, a screw group, a pressure head, a support block, a rotating frame, a roller and a control component. The controller is installed on the right wall of the frame, and a support frame is connected to the middle of the top of the frame. The motor is installed on the top of the support frame. The support frame is provided with a gear group consisting of two small gears and a large gear. The large gear is coaxially connected to the motor output shaft. The two small gears are located on the left and right sides of the large gear and are rotatably connected to the support frame through bearings, and the large gear and the two small gears are meshed with each other. The screw group is composed of two screws, each screw passes through the corresponding small gear and forms a threaded transmission connection with the small gear. The top of the two screws is connected by a connecting rod, and the bottom of the two screws is jointly installed with a pressure head. The pressure head has an integrated pressure sensor, and the motor and the pressure sensor are electrically connected to the controller through electrical circuits. Support blocks are symmetrically connected on the left and right sides of the upper inner side of the frame. A rotating frame is rotatably connected between each of the two symmetrical support blocks. Rollers are symmetrically rotatably connected inside the rotating frame. A control component is provided on the top of the frame.

[0007] Optionally, the control component includes a rocker, a connecting piece, a piston cylinder, a pressure relief valve and an air intake valve. The piston cylinder is symmetrically installed on the top of the frame, and the pressure relief valve and the air intake valve are installed on the inner side of the top of the piston cylinder, wherein the pressure relief valve is electrically connected to the controller, and the ends of the piston rods of the piston cylinder are respectively connected to connecting pieces. An obliquely arranged rocker is connected to the middle part of the upper side of the rotating frame, and the rocker forms a movable connection with the connecting piece on the corresponding side. In the initial state, the piston rod of the piston cylinder is in an extended state, and the air pressure inside the piston cylinder is in a standard atmospheric pressure state.

[0008] Optionally, it also includes a lifting frame, a scale rod and a reset spring. The front and rear sides of the frame are respectively slidably connected to the lifting frame, and the front and rear sides of the frame are symmetrically connected to the scale rods. The two sides of the lifting frame are slidably connected to the corresponding scale rods. The lower half of the scale rod is marked with millimeter-level scale lines. Reset springs are connected between the left and right sides of the lifting frame and the corresponding scale rods. The reset spring is sleeved on the scale rod. A slide rail is provided on the inner side of the lifting frame, and the front and rear ends of the rotating frame are slidably connected to the slide rail.

[0009] Optionally, it also includes a center frame, a pulley, a compression spring and a tripod. The middle part of the lifting frame is slidably connected to the center frame, two compression springs are connected between the center frame and the lifting frame, the outer side of the center frame is rotatably connected to the pulley, and the tripod is connected to a position near the pulley on the frame. The pulley is in contact with the side wall of the tripod, and the compression spring is in a compressed state.

[0010] Optionally, it also includes a conveying assembly, a double-axis frame, a guide rod and a buffer spring. The conveying assembly is installed at the bottom of the frame, the guide rods are symmetrically connected to the rear side of the lower part of the frame, the double-axis frame is slidably connected between the two guide rods, and a buffer spring is connected between the double-axis frame and the frame. The buffer spring is sleeved on the guide rod, and the upper and lower axes of the double-axis frame press against the belt of the conveying assembly, so that the rear part of the belt forms an upward inclined buffer section.

[0011] Optionally, a buffer ring and a return spring are also included. The bottom of the pressure head is slidably connected to the buffer ring. A through hole is opened in the middle of the buffer ring for the pressure head contact to pass through. Multiple return springs are connected between the outer ring of the buffer ring and the pressure head.

[0012] Optionally, when the return spring is in a free state, the buffer ring protrudes from the bottom surface of the pressure head by 3 mm to 5 mm.

[0013] Optionally, silicone rods are further included, and the two side walls of the pressure head are connected to the silicone rods, and the two silicone rods are distributed in an eight-shaped shape.

[0014] The beneficial effects of the present invention are: 1. Through the rotating structure of the rotating frame and the roller, in conjunction with the buffer system of the piston cylinder, the dynamic outward shift of the support force action line at the bottom of the screen is achieved. When the pressure head is loaded, the roller automatically adjusts the support position as the screen deforms, so that the edge support force moves outward evenly as the pressure increases, effectively reducing the risk of local overload at the edge, and ensuring that the screen is subjected to compressive testing under a more uniform stress state. Compared with the traditional fixed support testing method, the test data is closer to the actual average compressive strength of the screen.

[0015] 2. The integrated pressure sensor and scale rod displacement monitoring system collects pressure-displacement data in real time and synchronously to form a complete mechanical performance curve. The scale rod adopts laser-etched millimeter-level scale, combined with the precise displacement transmission of the lifting frame, it can accurately record the full displacement change of the screen from initial pressure to the moment of rupture, providing multi-dimensional data support for the mechanical analysis of screen materials.

[0016] 3. The buffer ring and return spring at the bottom of the pressure head form a shock-absorbing structure. When contacting the screen, the buffer ring first elastically buffers it to avoid detection errors caused by rigid impact. The conveying component cooperates with the double-axis frame and buffer spring to form a falling material buffer system, which allows the screen to fall smoothly on the belt and reduces the falling material damage rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a three-dimensional structural diagram of the motor, gear set, screw rod set and other components of the present invention.

[0019] Figure 3 It is a schematic planar structural diagram of the rocker, connecting piece, piston cylinder and other components of the present invention.

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the buffer ring, return spring, silicone rod and other components of the present invention.

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the support block, rotating frame, rollers and other components of the present invention.

[0022] Figure 6 It is a schematic planar structural diagram of the piston cylinder, pressure relief valve, intake valve and other components of the present invention.

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure of the components such as the scale rod, the center frame and the pulley of the present invention.

[0024] Figure 8 It is a schematic diagram of the three-dimensional structure of the pulley, compression spring, tripod and other components of the present invention.

[0025] Figure 9 It is a schematic planar structural diagram of the rotating frame, lifting frame, scale rod and other components of the present invention.

[0026] Figure 10 It is a three-dimensional structural diagram of the conveying assembly, double-axis frame, guide rod and other components of the present invention.

[0027] Figure 11 It is a three-dimensional structural diagram of the double-axle frame, guide rods, buffer springs and other components of the present invention.

[0028] Explanation of the reference numerals: 1: frame, 101: controller, 102: support frame, 103: motor, 104: gear set, 105: screw rod set, 106: pressure head, 201: support block, 202: rotating frame, 203: roller, 204: rocker, 205: connecting piece, 206: piston cylinder, 2061: pressure relief valve, 2062: air intake valve, 301: lifting frame, 302: scale rod, 303: return spring, 401: centering frame, 402: pulley, 403: compression spring, 404: tripod, 501: conveying assembly, 502: double-axis frame, 503: guide rod, 504: buffer spring, 601: buffer ring, 602: return spring, 7: silicone rod. DETAILED DESCRIPTION

[0029] Example 1: A pressure resistance detection device suitable for mobile phone screens, such as Figures 1-6As shown, it includes a frame 1, a controller 101, a support frame 102, a motor 103, a gear group 104, a screw group 105, a pressure head 106, a support block 201, a rotating frame 202, a roller 203 and a control component. The controller 101 is installed on the right side wall of the frame 1 by bolts to realize automatic control and data processing of the entire detection process. The support frame 1 is connected to the middle of the top of the frame 1. The motor 103 is installed on the top of the support frame 102 by bolts. A gear group 104 consisting of two small gears and a large gear is provided on the support frame 102. The large gear is coaxially connected to the output shaft of the motor 103. The two small gears are respectively located on the left and right sides of the large gear and are rotatably connected to the support frame 102 through bearings. The large gear and the two small gears are meshed with each other to form a gear transmission pair to realize power distribution and transmission. The screw group 105 consists of two The screw rods are composed of screw rods, each screw rod passes through the corresponding pinion and forms a threaded transmission connection with the pinion. The top ends of the two screw rods are rigidly connected by a connecting rod to limit the horizontal displacement of the screw rod group 105 and only allow it to move in the vertical direction. The bottom ends of the two screw rods are jointly installed with a pressure head 106. The pressure head 106 has an integrated high-precision pressure sensor for real-time collection of pressure data during pressure loading. The motor 103 and the pressure sensor are electrically connected to the controller 101 through electrical circuits to achieve closed-loop control of power control and pressure data feedback. Support blocks 201 are symmetrically connected to the left and right sides of the upper side of the frame 1. A rotating frame 202 is rotatably connected between each of the two symmetrical support blocks 201. The inner side of the rotating frame 202 is symmetrically rotatably connected to rollers 203. The rollers 203 are used to support the mobile phone screen. A control component is provided on the top of the frame 1.

[0030] like Figure 2 、 Figure 3 、 Figure 5 and Figure 6 As shown, the control assembly includes a rocker arm 204, a connector 205, a piston cylinder 206, a pressure relief valve 2061 and an air intake valve 2062. The piston cylinder 206 is symmetrically installed on the top of the frame 1 by bolts. The pressure relief valve 2061 and the air intake valve 2062 are installed on the inner side of the top of the piston cylinder 206 by bolts. The pressure relief valve 2061 is electrically connected to the controller 101 for realizing automatic control of pressure release. The ends of the piston rods of the piston cylinder 206 are respectively connected to the connectors 205. The middle part of the upper side of the rotating frame 202 is connected to an obliquely arranged rocker arm 204. The rocker arm 204 forms a movable connection with the connector 205 on the corresponding side, which can convert the rotational displacement of the rotating frame 202 into the linear displacement of the piston rod. In the initial state, the piston rod of the piston cylinder 206 is in an extended state, and the internal air pressure of the piston cylinder 206 is at standard atmospheric pressure. The air intake valve 2062 adopts a one-way valve structure, which only allows external gas to flow into the piston cylinder 206 in one direction.

[0031] When testing the pressure resistance of a mobile phone screen, the screen is first pushed horizontally onto roller 203 and adjusted to the center. The target pressure value is set by operating controller 101, which then drives motor 103 according to a preset program. The rotation of the output shaft of motor 103 is transmitted via the large gear to the small gears on both sides. The transmission ratio characteristics of gear set 104 are used to achieve power diversion and deceleration, thereby driving screw set 105 to move downward in the vertical direction, thereby driving pressure head 106 to move downward synchronously. When the pressure head 106 contacts the surface of the mobile phone screen, it begins to apply a vertical downward pressure load to the screen. The pressure sensor collects pressure data in real time and feeds it back to the controller 101 to form a pressure closed-loop monitoring system. As the pressure head 106 continues to press down, the mobile phone screen pushes the roller 203 and the rotating frame 202 to rotate outward around the support block 201 under the action of pressure. This rotation process changes the contact position between the roller 203 and the screen, so that the line of action of the supporting force at the bottom of the screen gradually moves from the inside of the screen to the outside, effectively avoiding premature damage to the edge of the screen due to local stress concentration, and realizing dynamic uniformity of the stress state of the screen. The rotation of the rotating frame 202 is transmitted to the connecting piece 205 through the rocker 204, pushing the piston rod of the piston cylinder 206 to retract inward, compressing the gas inside the piston cylinder 206. As the loading pressure of the pressure head 106 increases, the air pressure in the piston cylinder 206 rises synchronously, forming a dynamic support force adjustment mechanism coupled with the pressure process of the screen. When the pressure sensor detects that the pressure on the screen reaches When the preset threshold is reached, the controller 101 immediately issues a control command to drive the motor 103 to stop running, and at the same time activates the pressure relief valve 2061 to quickly release the high-pressure gas inside the piston cylinder 206, allowing the rotating frame 202 and the roller 203 to droop freely under the action of gravity, releasing the support constraint on the screen, and facilitating the staff to remove the screen after inspection. If the screen breaks during the inspection process, the controller 101 can automatically trigger the shutdown program according to the preset crack detection algorithm (such as pressure mutation detection, strain anomaly detection, etc.), record the current pressure value as the maximum pressure value of the screen, and after completing a single inspection, control the motor 103 to reverse operation by operating the controller 101, driving the screw group 105 and the pressure head 106 to move upward and reset; the staff manually rotates the rotating frame 202 and the roller 203 in the opposite direction to the initial horizontal position. At this time, the piston rod extends under the action of the external atmospheric pressure, and the external gas is re-filled into the piston cylinder 206 through the inlet valve 2062, restoring the standard air pressure state inside the piston cylinder 206. After the pressure relief valve 2061 is closed, the internal air pressure of the piston cylinder 206 can maintain the roller 203 stably fixed in the horizontal position, and the next screen pressure resistance test cycle can be carried out.

[0032] Example 2: Based on Example 1, Figure 7-Figure 9As shown, it also includes a lifting frame 301, a scale rod 302 and a return spring 303. The front and rear sides of the frame 1 are respectively slidably connected to the lifting frame 301, and the front and rear sides of the frame 1 are symmetrically connected to the scale rod 302 by bolts. The two sides of the lifting frame 301 are slidably connected to the corresponding scale rod 302. The lower half of the scale rod 302 is marked with millimeter-level scale lines using laser etching technology. The return spring 303 is connected between the left and right sides of the lifting frame 301 and the corresponding scale rod 302. The return spring 303 is sleeved on the scale rod 302. The inner side of the lifting frame 301 is provided with a slide rail, and the front and rear ends of the rotating frame 202 are slidably connected to the slide rail.

[0033] When the phone screen is subjected to pressure and displacement, the downward pressure of the screen pushes the rotating frame 202 outward around the support block 201. During this process, the rotating frame 202 slides along the inner rails of the lifting frame 301, thereby driving the lifting frame 301 downward. The return spring 303 is linearly stretched. By observing the corresponding position of the reference line on the lifting frame 301 and the scale on the scale rod 302, the amount of downward pressure on the screen can be accurately measured. When the screen cracks, this displacement data is linked to the real-time pressure value collected by the pressure sensor to form a displacement-pressure curve data for analyzing the screen damage mechanism. After the test is completed, the pressure relief valve 2061 opens to release the air pressure in the piston cylinder 206. The rotating frame 202 loses its support force. The elastic restoring force of the return spring 303 drives the lifting frame 301 upward along the scale rod 302 to reset. At the same time, the sliding rails drive the rotating frame 202 to rotate inward, causing the roller 203 to automatically return to its horizontal initial position, avoiding errors caused by manual intervention.

[0034] like Figure 7-Figure 9 As shown, it also includes a center frame 401, a pulley 402, a compression spring 403 and a tripod 404. The middle part of the lifting frame 301 is slidably connected to the center frame 401, two compression springs 403 are connected between the center frame 401 and the lifting frame 301, and the outer side of the center frame 401 is rotatably connected to the pulley 402. The tripod 404 is welded to the position near the pulley 402 on the frame 1. The pulley 402 is in contact with the side wall of the tripod 404, and the compression spring 403 is in a compressed state.

[0035] When the pressure head 106 moves downward to apply pressure to the screen, the screen drives the rotating frame 202 and the roller 203 to rotate outward, and the rotating frame 202 drives the lifting frame 301 to move downward, which drives the centering frame 401 and the pulley 402 to move downward synchronously. When the pulley 402 moves to a position aligned with the inclined surface of the tripod 404, the pre-compressed compression spring 403 releases its elastic potential energy, pushing the centering frame 401 to move inward, and the pulley 402 rolls along the inclined surface of the tripod 404. The inward movement of the centering frame 401 will apply symmetrical thrust to the front and rear sides of the screen, realizing automatic centering calibration of the screen on the roller 203, effectively correcting the offset error when the screen is placed, and ensuring that the detection load is evenly distributed in the center area of the screen. After the detection is completed, when the lifting frame 301 moves upward, the pulley 402 rolls along the outer side of the inclined surface of the tripod 404, forcing the centering frame 401 to move outward and reset, and the compression spring 403 accumulates pre-compression energy again, preparing for centering calibration for the next detection.

[0036] like Figure 10-11 As shown, it also includes a conveying assembly 501, a dual-axis frame 502, a guide rod 503 and a buffer spring 504. The conveying assembly 501 is installed at the bottom of the frame 1, and the guide rods 503 are welded symmetrically on the left and right sides of the lower rear side of the frame 1. The dual-axis frame 502 is slidably connected between the two guide rods 503. The buffer spring 504 is connected between the dual-axis frame 502 and the frame 1. The buffer spring 504 is sleeved on the guide rod 503. The upper and lower axes of the dual-axis frame 502 press against the belt of the conveying assembly 501, so that the rear part of the belt forms an upwardly inclined buffer section.

[0037] When the pressure head 106 applies force to press down on the screen, the screen pushes the rotating frame 202 and the roller 203 to move outward. When the roller 203 rotates outward to the limit, the screen gradually breaks away from the support of the roller 203. If the pressure head 106 continues to press down, the screen falls onto the conveyor belt. The double-axis frame 502 floats up and down along the guide rod 503 under the elastic action of the buffer spring 504, forming an elastic support for the belt. The upper and lower axis structures of the double-axis frame 502 ensure that the upper and lower sections of the belt are subjected to force linkage, while maintaining the belt tension, the buffer spring 504 effect absorbs the impact energy of the screen falling, reducing the probability of falling damage. After the detection is completed, the controller 101 drives the conveying component 501 to operate, and conveys the screen forward along the belt to the unloading area, realizing the automatic unloading process after detection.

[0038] like Figure 4As shown, it also includes a buffer ring 601 and a return spring 602. The buffer ring 601 is slidably connected to the bottom of the pressure head 106. A through hole is opened in the middle of the buffer ring 601 for the contact of the pressure head 106 to pass through. Multiple return springs 602 are connected between the outer ring of the buffer ring 601 and the pressure head 106. When the return spring 602 is in a free state, the buffer ring 601 extends 3mm-5mm beyond the bottom surface of the pressure head 106. During the downward movement of the pressure head 106, the buffer ring 601 first contacts the screen surface and slides upward. The return spring 602 is compressed to produce buffer damping to prevent the pressure head 106 from rigidly impacting the screen. This pre-buffering stage can eliminate the mechanical vibration interference in the initial stage of detection. After the buffer ring 601 is compressed to the limit position, the main body of the pressure head 106 begins to apply a detection load to the screen to ensure the accuracy of the starting point of the pressure sensor to collect data. After the detection is completed, the return spring 602 drives the buffer ring 601 to reset downward to prepare for pre-contact for the next detection.

[0039] like Figure 4 As shown, a silicone rod 7 is also included. The left and right side walls of the pressure head 106 are connected to the silicone rod 7 by a hinge. The two silicone rods 7 are distributed in an eight-shaped shape. The silicone rod 7 is made of silicone rubber with a Shore hardness of 30-40A, and a metal skeleton is embedded inside to maintain structural rigidity. During the downward movement of the pressure head 106, the silicone rods 7 on both sides contact the left and right sides of the screen before the pressure head 106, and the screen is laterally centered using the guiding effect of the eight-shaped structure. The elastic deformation of the silicone rubber can provide sufficient centering thrust and avoid hard scratches on the edge of the screen. When the screen is calibrated to the center position, the silicone rod 7 continues to bend elastically as the pressure head 106 continues to press down until the main body of the pressure head 106 contacts the screen surface, ensuring that the detection load is applied vertically along the geometric center of the screen, eliminating the detection deviation caused by screen offset.

Claims

1. A pressure resistance detection device suitable for mobile phone screens, characterized in that: The invention comprises a frame (1), a controller (101), a support frame (102), a motor (103), a gear set (104), a screw rod set (105), a pressure head (106), a support block (201), a rotating frame (202), a roller (203) and a control component. The controller (101) is installed on the right side wall of the frame (1). The top middle of the frame (1) is connected with the support frame (102). The motor (103) is installed on the top of the support frame (102). The support frame (102) is provided with a gear set (104) consisting of two small gears and a large gear. The large gear is coaxially connected to the output shaft of the motor (103). The two small gears are respectively located on the left and right sides of the large gear and are rotatably connected to the support frame (102) through bearings. The large gear and the two small gears are meshed with each other, the screw rod group (105) is composed of two screw rods, each screw rod passes through the corresponding small gear and forms a threaded transmission connection with the small gear, the top ends of the two screw rods are connected by a connecting rod, and the bottom ends of the two screw rods are jointly installed with a pressure head (106), the pressure head (106) has an integrated pressure sensor, and the motor (103) and the pressure sensor are electrically connected to the controller (101) through an electrical circuit, the upper left and right sides of the frame (1) are symmetrically connected with support blocks (201), and a rotating frame (202) is rotatably connected between each of the two symmetrical support blocks (201) in front and back, and a roller (203) is symmetrically rotatably connected to the inner side of the rotating frame (202), and a control component is provided on the top of the frame (1).

2. A pressure resistance detection device for mobile phone screens according to claim 1, characterized in that: The control component includes a rocker (204), a connecting piece (205), a piston cylinder (206), a pressure relief valve (2061) and an air intake valve (2062). The piston cylinder (206) is symmetrically installed on the top of the frame (1). The pressure relief valve (2061) and the air intake valve (2062) are installed on the inner side of the top of the piston cylinder (206). The pressure relief valve (2061) is electrically connected to the controller (101). The ends of the piston rods of the piston cylinder (206) are respectively connected to the connecting pieces (205). The middle part of the upper side of the rotating frame (202) is connected to the rocker (204) arranged in an oblique direction. The rocker (204) forms a movable connection with the connecting piece (205) on the corresponding side. In the initial state, the piston rod of the piston cylinder (206) is in an extended state, and the internal air pressure of the piston cylinder (206) is in a standard atmospheric pressure state.

3. The pressure resistance detection device for mobile phone screens according to claim 1, characterized in that: The utility model also includes a lifting frame (301), a scale rod (302) and a return spring (303). The front and rear sides of the frame (1) are respectively slidably connected to the lifting frame (301). The front and rear sides of the frame (1) are symmetrically connected to the scale rod (302). Both sides of the lifting frame (301) are slidably connected to the corresponding scale rod (302). The lower half of the scale rod (302) is marked with millimeter-level scale lines. The return spring (303) is connected between the left and right sides of the lifting frame (301) and the corresponding scale rod (302). The return spring (303) is sleeved on the scale rod (302). The inner side of the lifting frame (301) is provided with a slide rail. The front and rear ends of the rotating frame (202) are slidably connected to the slide rail.

4. The pressure resistance detection device for mobile phone screens according to claim 3, characterized in that: The lifting frame (301) further comprises a center frame (401), a pulley (402), a compression spring (403) and a tripod (404). The middle of the lifting frame (301) is slidably connected to the center frame (401). Two compression springs (403) are connected between the center frame (401) and the lifting frame (301). The outer side of the center frame (401) is rotatably connected to the pulley (402). The tripod (404) is connected to a position near the pulley (402) on the frame (1). The pulley (402) and the side wall of the tripod (404) are in abutment state, and the compression spring (403) is in a compressed state.

5. The pressure resistance detection device for mobile phone screens according to claim 1, characterized in that: The utility model also comprises a conveying assembly (501), a double-axis frame (502), a guide rod (503) and a buffer spring (504); the conveying assembly (501) is installed at the bottom of the frame (1); the guide rod (503) is symmetrically connected to the rear side of the lower part of the frame (1); the double-axis frame (502) is slidably connected between the two guide rods (503); a buffer spring (504) is connected between the double-axis frame (502) and the frame (1); the buffer spring (504) is sleeved on the guide rod (503); the upper and lower axes of the double-axis frame (502) are against the belt of the conveying assembly (501), so that the rear part of the belt forms an upwardly inclined buffer section.

6. The pressure resistance detection device for mobile phone screens according to claim 1, characterized in that: The pressure head (106) further comprises a buffer ring (601) and a return spring (602). The bottom of the pressure head (106) is slidably connected to the buffer ring (601). A through hole is provided in the middle of the buffer ring (601) for the contact of the pressure head (106) to pass through. A plurality of return springs (602) are connected between the outer ring of the buffer ring (601) and the pressure head (106).

7. The pressure resistance detection device for mobile phone screens according to claim 6, characterized in that: When the return spring (602) is in a free state, the buffer ring (601) extends 3 mm to 5 mm beyond the bottom surface of the pressure head (106).

8. The pressure resistance detection device for mobile phone screens according to claim 1, characterized in that: It also includes a silicone rod (7), and the two side walls of the pressure head (106) are connected with the silicone rod (7), and the two silicone rods (7) are distributed in an eight-shaped shape.

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