Laptop foot pad measuring device

Abstract

The invention discloses a notebook computer foot pad measuring device, which belongs to the field of testing and comprises a feeding device, which detects whether a notebook computer is vertically opened and transmits the vertically opened notebook computer; a first code scanning device, which scans the D surface of the notebook computer; a second code scanning device, which scans the screen of the notebook computer; a grabbing device, which clamps the notebook computer to position the keyboard surface of the notebook computer; an opening device, which pushes the screen surface of the notebook computer to simulate the working state of the notebook computer; a foot pad measuring device, which comprises a line laser, a first detection driving component, and a second detection driving component, wherein the second detection driving component and the first detection driving component drive the line laser to move in different directions to detect the flatness of multiple foot pads of the notebook computer, so that the notebook computer can detect the flatness of the foot pads in the working state, and the detection is more accurate and fully automated.

Description

Technical Field

[0001] The invention relates to testing equipment, in particular to a notebook computer foot pad measuring equipment. Background Art

[0002] Notebook computers are also called "portable computers, handheld computers, PDAs or laptop computers". Their biggest feature is that they are small and easy to carry than PCs. They are small and portable personal computers, usually weighing 1-3 kilograms. The current development trend is that they are getting smaller and smaller, lighter and lighter, but more powerful.

[0003] During the processing of laptop computers, the pads at the bottom must be highly uniform, otherwise they are prone to shaking when placed, which requires the flatness test of the laptop pads. Currently, the test of laptop pads is generally done by manual visual inspection, which has low test efficiency and human test errors. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, one of the purposes of the present invention is to provide a laptop computer foot pad measuring device, which can open the laptop computer and detect the flatness of the laptop computer in a simulated use state, and the detection is more accurate and fully automated.

[0005] One of the purposes of the present invention is achieved by the following technical solution:

[0006] A laptop foot pad measuring device comprises a feeding device for detecting whether a laptop is vertically opened and conveying the vertically opened laptop; a first code scanning device for scanning the D surface of the laptop; a second code scanning device for scanning the screen of the laptop; a gripping device for clamping the laptop to position the keyboard surface of the laptop; an opening device for pushing the screen surface of the laptop to simulate the working state of the laptop; a foot pad measuring device comprising a line laser, a first detection drive component, and a second detection drive component, wherein the second detection drive component and the first detection drive component drive the line laser to move in different directions to detect the flatness of multiple foot pads of the laptop.

[0007] Furthermore, the loading device includes a conveying structure and a detection structure, the detection structure includes a vertical plate and three detectors installed on the vertical plate, and the three detectors detect whether the laptop computer on the conveying structure is opened vertically.

[0008] Furthermore, the laptop computer foot pad measuring device also includes a transfer device and a workbench, and the transfer device reciprocates on the workbench to move the laptop computer on the loading device to the grabbing device.

[0009] Furthermore, the transfer device includes a transfer drive and a transfer assembly, the transfer drive drives the transfer assembly to move in a first direction, the transfer assembly includes a bracket and a second conveyor belt, the second conveyor belt is installed on the bracket, and the second conveyor belt drives the laptop computer to move in a second direction perpendicular to the first direction.

[0010] Furthermore, the laptop computer foot pad measuring equipment also includes a cache station, which is located between the two transfer devices. The cache station includes a transfer component, which drives the laptop computer to move, and the extension direction of the cache station is parallel to the extension direction of the loading device.

[0011] Furthermore, the first code scanning device includes a base plate, a mounting frame and a first code scanning gun. The mounting frame is adjustably mounted on the base plate, and the first code scanning gun is mounted on the mounting frame.

[0012] Furthermore, the first code scanning device also includes a connecting frame, the connecting frame is provided with a through hole and a mounting groove, the mounting groove is an arc-shaped groove, the connecting frame and the mounting frame are rotatably connected through the through hole, and the connecting frame and the mounting frame are adjusted in angle through the mounting groove.

[0013] Furthermore, the second code scanning device also includes a joint frame and a second code scanning gun, the joint frame includes a first rod, a second rod and a third rod, the second rod and the first rod are adjustably mounted, the third rod and the second rod are adjustably mounted, and the second code scanning gun is mounted on the third rod.

[0014] Furthermore, the gripping device includes a second driving member, a horizontal plate and two clamping claws. The second driving member drives the horizontal plate to move up and down. The two clamping claws are respectively installed on the horizontal plate and can move along the horizontal plate. Each of the clamping claws includes a fixed claw and a movable claw. The fixed claw and the movable claw clamp the side of the laptop keyboard surface.

[0015] Furthermore, the opening device also includes an opening drive member, a push rod and a contact wheel, the opening drive member is fixed to the horizontal plate, the push rod is installed at the output end of the opening drive member, and the contact wheel is installed on the push rod to push the screen.

[0016] Compared with the prior art, when the laptop computer foot pad measuring device of the present invention is used, the loading device is opened vertically, the loading device detects whether the laptop computer is opened vertically and transmits the vertically opened laptop computer, the first scanning device and the second scanning device scan the QR code on the laptop computer and record the laptop computer information; the grasping device positions the laptop computer, and the opening device pushes the screen surface of the laptop computer to simulate the working state of the laptop computer, so that the laptop computer can detect the flatness of the foot pad in the working state, and the detection is more accurate and fully automated. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of the laptop computer foot pad measuring device of the present invention;

[0018] Figure 2 for Figure 1 A three-dimensional diagram of the loading device of the notebook computer foot pad measuring equipment;

[0019] Figure 3 for Figure 2 A three-dimensional diagram of the detection structure of the feeding device;

[0020] Figure 4 for Figure 2 A three-dimensional diagram of a cleaning structure of a feeding device;

[0021] Figure 5 for Figure 1 A three-dimensional diagram of a transfer device of a laptop computer foot pad measuring device;

[0022] Figure 6 for Figure 5 A partial structural stereogram of the transfer device;

[0023] Figure 7 for Figure 1 A partial structural stereogram of the laptop foot pad measuring device;

[0024] Figure 8 for Figure 7 A three-dimensional diagram of a first code scanning device of a notebook computer foot pad measuring device;

[0025] Fig. 9 for Figure 7 A three-dimensional diagram of a second code scanning device of a laptop computer foot pad measuring device;

[0026] Fig.10 for Figure 7 A partial structural stereogram of the laptop foot pad measuring device;

[0027] Fig.11 for Figure 7 A three-dimensional diagram of a foot pad measuring device of a laptop computer foot pad measuring device;

[0028] Fig.12 for Figure 1 A perspective view of the lifting device of the laptop pad measurement equipment.

[0029] In the figure: 10, workbench; 11, groove; 20, feeding device; 21, conveying structure; 210, side plate; 211, first conveyor belt; 22, detection structure; 220, vertical plate; 221, detector; 222, guide wheel; 23, cleaning structure; 230, roller brush; 231, ash receiving groove; 232, cleaning drive member; 233, transmission belt; 234, rotating shaft; 24, protection structure; 240, frame; 241, protection plate; 242, channel; 30, transfer device 31. Transfer drive member; 32. Transfer assembly; 321. Bracket; 322. Connecting plate; 323. Fixing plate; 324. Mounting plate; 325. Coupling; 326. Second conveyor belt; 327. Cleaning brush; 328. Steering shaft; 329. First drive member; 40. First code scanning device; 41. Bottom plate; 410. Mounting hole; 42. Mounting frame; 420. Fixed end; 4201. Fixed hole; 421. Mounting end; 43. Connecting frame; 430. Through hole; 431, mounting slot; 44, first barcode scanner; 50, second barcode scanner; 51, joint frame; 510, first rod; 511, second rod; 512, third rod; 52, second barcode scanner; 60, crossbeam; 70, gripping device; 71, second drive member; 72, cross plate; 73, third drive member; 74, clamping claw; 740, fixed claw; 741, extension plate; 742, first claw; 743, movable claw; 744, fourth drive member; 745, second claw ;80. opening device;81. opening drive member;82. push rod;83. contact wheel;90. foot pad measuring device;91. carrier;92. first detection drive member;93. second detection drive member;94. height adjustment plate;940. first plate body;941. second plate body;95. line laser;100. lifting device;101. third plate body;102. lifting drive member;103. roller;104. read-write member;105. positioning member;200. laptop computer. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be another intermediate component through which it is fixed. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be another intermediate component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be another intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] Figures 1 to 12 The present invention is a notebook computer foot pad measuring device, which is used to detect the flatness of a notebook computer 200 foot pad.

[0034] The notebook computer foot pad measuring device includes a workbench 10, a loading device 20, a transfer device 30, a first code scanning device 40, a second code scanning device 50, a crossbeam 60, a gripping device 70, an opening device 80, a foot pad measuring device 90 and a lifting device 100.

[0035] The workbench 10 is provided with a groove 11 , and the groove 11 is used to install the transfer device 30 and allow the transfer device 30 to reciprocate.

[0036] The loading device 20 includes a conveying structure 21 , a detecting structure 22 , a cleaning structure 23 and a protective structure 24 .

[0037] The conveying structure 21 includes two side plates 210 and a first conveying belt 211. The first conveying belt 211 is installed between the two side plates 210. The first conveying belt 211 is a rubber conveying belt.

[0038] The detection structure 22 includes a vertical plate 220, a detector 221, and a plurality of guide wheels 222. The vertical plate 220 is fixed to one side of the first conveyor belt 211. There are three detectors 221, and the three detectors 221 are fixed to the vertical plate 220. Since three points determine a plane, the three detectors 221 can detect whether the screen surface of the laptop computer 200 is perpendicular to the keyboard surface. The guide wheels 222 are rotatably mounted on the vertical plate 220. The plurality of guide wheels 222 are arranged in two rows, and the two rows of guide wheels 222 guide the movement of the laptop computer 200 and prevent the laptop computer 200 from being damaged.

[0039] The cleaning structure 23 includes a roller brush 230 , a dust receiving groove 231 , a cleaning driving member 232 , a driving belt 233 and a rotating shaft 234 .

[0040] The roller brush 230 is rotatably mounted between the two side plates 210 via a rotating shaft 234. The roller brush 230 is located below the first conveyor belt 211, and the roller brush 230 cleans the first conveyor belt 211. The roller brush 230 is located in the ash receiving groove 231, and the cross section of the ash receiving groove 231 is U-shaped. The cleaning drive member 232 drives the roller brush 230 to rotate through the transmission belt 233 to clean the first conveyor belt 211.

[0041] The protective structure 24 includes a frame 240 and a protective plate 241. The frame 240 is fixed to the workbench 10, and the side plate 210 of the conveying structure 21 is partially located in the frame 240. The frame 240 is in an inverted U shape. The protective plate 241 is fixed to the frame 240, and a channel 242 is formed between the protective plate 241 and the frame 240, and the channel 242 is convenient for the vertically opened laptop computer 200 to pass through. The channel 242 is L-shaped. The protective plate 241 can prevent the operator from approaching other areas except the feeding device 20 to prevent the operator from being accidentally injured. Specifically, the protective plate 241 is a transparent plate, which is convenient for the operator to observe the detection process of the laptop computer 200.

[0042] The transfer device 30 is installed in the groove 11 of the workbench 10. The transfer device 30 includes a transfer drive 31 and a transfer assembly 32. The transfer assembly 32 is installed at the output end of the transfer drive 31, and the transfer drive 31 drives the transfer assembly 32 to move back and forth to move the laptop computer 200 from the loading station to the buffer station. The transfer assembly 32 includes a bracket 321, a coupling 325, a second conveyor belt 326, a cleaning brush 327, a steering shaft 328 and a first drive 329.

[0043] The bracket 321 includes a connecting plate 322, a fixing plate 323 and a mounting plate 324. One end of the connecting plate 322 is connected to the output shaft of the transfer drive member 31, and the other end is fixedly connected to the fixing plate 323. Both ends of the fixing plate 323 are fixedly connected to the two mounting plates 324. The two second conveyor belts 326 are respectively sleeved on the two mounting plates 324, and the extension direction of the second conveyor belts 326 is perpendicular to the driving direction of the transfer drive member 31, so that the laptop computer 200 can move in two directions perpendicular to each other, so as to move from the parallel loading station to the buffering station.

[0044] The first driving member 329 is fixed to the fixed plate 323, and the first driving member 329 drives the steering shaft 328 to rotate through the coupling 325. The steering shaft 328 is sleeved on the second conveyor belt 326 to rotate and tilt downward, so that the cleaning brush 327 can clean the second conveyor belt 326.

[0045] The buffer station includes two transfer components 32 . The transfer components 32 drive the notebook computer 200 to move to another transfer device 30 . The transfer device 30 moves the notebook computer 200 to the opening station.

[0046] The first code scanning device 40 includes a bottom plate 41, a mounting frame 42, a connecting frame 43 and a first code scanning gun 44. The bottom plate 41 is provided with a plurality of mounting holes 410, and the plurality of mounting holes 410 form two vertical rows, so that the mounting frame 42 can be installed at different positions to adjust the position of the first code scanning gun 44. The mounting frame 42 includes a fixed end 420 and a mounting end 421. The fixed end 420 is vertically fixed to the mounting end 421. The mounting frame 42 is L-shaped. The fixed end 420 is provided with a fixing hole 4201, and is fixed to the bottom plate 41 through the fixing hole 4201. The connecting frame 43 is provided with a through hole 430 and a mounting groove 431, and the mounting groove 431 is arc-shaped. The connecting frame 43 is rotatably connected to the mounting end 421 through the through hole 430. The connecting frame 43 is fixed to the mounting end 421 at different positions of the mounting groove 431 to adjust the angle of the first code scanning gun 44. The first code scanning device 40 scans the D surface of the laptop computer 200 and records the information of the laptop computer 200.

[0047] The second barcode scanning device 50 includes a joint frame 51 and a second barcode scanning gun 52, and the second barcode scanning gun 52 is fixed to the joint frame 51. The joint frame 51 includes a first rod 510, a second rod 511, and a third rod 512. The first rod 510 and the second rod 511 are adjustable and installed perpendicular to each other. The second rod 511 and the third rod 512 are adjustable and installed perpendicular to each other. The second barcode scanning gun 52 is installed on the third rod 512, and the second barcode scanning gun 52 scans the screen of the laptop computer 200 to record the information of the laptop computer 200.

[0048] The crossbeam 60 is fixed to the workbench 10 , and a driving member is disposed on the crossbeam 60 to drive the grabbing device 70 to move along the crossbeam 60 .

[0049] There are two gripping devices 70. Each gripping device 70 includes a second driving member 71, a transverse plate 72, a third driving member 73, and two clamping claws 74. The second driving member 71 is mounted on the crossbeam 60, and the output end of the second driving member 71 is connected to the transverse plate 72. The two clamping claws 74 are slidably mounted on the transverse plate 72, and the third driving member 73 drives the clamping claws 74 to slide relative to the transverse plate 72.

[0050] Each clamping jaw 74 includes a fixed jaw 740 and a movable jaw 743. The fixed jaw 740 includes an extension plate 741 and a first jaw 742. The first jaw 742 is fixed to the end of the extension plate 741. The movable jaw 743 includes a fourth driving member 744 and a second jaw 745. The fourth driving member 744 is fixed to the extension plate 741. The second jaw 745 is installed at the output end of the fourth driving member 744.

[0051] The opening device 80 includes an opening driving member 81, a push rod 82, and a contact wheel 83. The opening driving member 81 is fixed to the horizontal plate 72. The output end of the opening driving member 81 is connected to the push rod 82 to drive the push rod 82 to move. The contact wheel 83 is installed on the push rod 82, and the contact wheel 83 contacts the screen of the notebook computer 200 to prevent the screen of the notebook computer 200 from being damaged.

[0052] The foot pad measuring device 90 includes a carrier 91, a first detection driver 92, a second detection driver 93, a height adjustment plate 94 and a line laser 95. The carrier 91 is used to place the laptop computer 200. The output end of the first detection driver 92 is connected to the second detection driver 93. The output end of the second detection driver 93 is connected to the height adjustment plate 94. The line laser 95 is fixed to the height adjustment plate 94. The first detection driver 92 and the second detection driver 93 respectively provide two vertical directions of movement to the line laser 95. The height adjustment plate 94 includes a first plate body 940 and a second plate body 941. The second plate body 941 is adjustably connected to the first plate body 940 to facilitate the height of the height adjustment plate 94. The height adjustment plate 94 adjusts the height of the line laser 95.

[0053] The lifting device 100 includes a third plate 101, a lifting drive 102, a roller 103, a read / write member 104, and a positioning member 105. The lifting drive 102 is fixed to the third plate 101. A plurality of rollers 103 are installed at the output end of the lifting drive 102, and the rollers 103 receive the laptop computer 200. The read / write member 104 reads the information of the laptop computer 200. The positioning member 105 is fixedly installed at the edge of the roller 103, and the positioning member 105 is used to position the laptop computer 200.

[0054] When using the laptop foot pad measuring device, the laptop 200 is manually opened to 90 degrees and placed on the conveying structure 21 of the loading device 20. The guide wheel 222 guides the laptop 200 to move and prevents the laptop 200 from being damaged. The screen surface of the laptop 200 contacts the three detectors 221 to detect whether the laptop 200 is opened vertically. The conveying structure 21 drives the laptop 200 to move horizontally, and the laptop 200 enters the second conveyor belt 326 of the transfer device 30 through the channel 242.

[0055] The second conveyor belt 326 of the transfer device 30 drives the notebook computer 200 to move to the buffering station, and then moves to the opening station through the transfer device 30 .

[0056] The second driving member 71 of the gripping device 70 drives the clamping claw 74 to move downward, and the third driving member 73 drives the clamping claw 74 to move horizontally to open the two clamping claws 74. The fourth driving member 744 drives the second claw 745 to close with the first claw 742 to clamp the bottom of the laptop computer 200.

[0057] The opening drive member 81 of the opening device 80 drives the push rod 82 to move, and the contact wheel 83 contacts the screen of the laptop computer 200, so that the laptop computer 200 is opened to a range of 120°±20°, simulating the opening and closing angle of the laptop computer 200 during the use by the end user. The laptop computer 200 is simulated into a working state, which facilitates the detection of the laptop computer 200 in the working state and makes the detection result more accurate. Similarly, it is ensured that a relatively uniform test standard is implemented when the laptop computer 200 measures the flatness of the foot pad. Further, the laptop computer 200 is opened to 120°±5°. In this embodiment, the laptop computer 200 is opened to 120°.

[0058] After the laptop computer 200 is opened to 120 degrees, the grabbing device 70 grabs the laptop computer 200 onto the carrier 91 of the inspection station, and the first inspection driving member 92 and the second inspection driving member 93 of the foot pad measuring device 90 drive the line laser 95 to inspect the flatness of the foot pad of the laptop computer 200 .

[0059] The grabbing device 70 grabs the laptop computer 200 that has passed the inspection to the roller 103 of the lifting device 100. At this time, the positioning member 105 positions the laptop computer 200, and the reading and writing member 104 reads the information of the laptop computer 200. The lifting driving member 102 drives the laptop computer 200 to move up and down, and transports the inspected laptop computer 200 to the next station.

[0060] During the above detection process, the roller brush 230 of the cleaning structure 23 and the cleaning brush 327 of the transfer device 30 clean the conveyor belt to prevent the conveyor belt from being dirty and affecting the laptop computer 200.

[0061] Through the above design, when the laptop computer 200 is loaded, it is opened vertically. The loading device 20 detects whether the laptop computer 200 is opened vertically and transmits the vertically opened laptop computer 200. The first scanning device 40 and the second scanning device 50 scan the QR code on the laptop computer 200 to record the information of the laptop computer 200. The grasping device 70 positions the laptop computer 200, and the opening device 80 pushes the screen surface of the laptop computer 200 to simulate the working state of the laptop computer 200, so that the laptop computer 200 can detect the flatness of the foot pad in the working state, and the detection is more accurate and fully automated.

[0062] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which are equivalent modifications and improvements made to the above embodiments based on the essential technology of the present invention, and all of them belong to the protection scope of the present invention.

Claims

1. A laptop foot pad measurement device, Features: include A feeding device, detecting whether a laptop computer is vertically opened and conveying the vertically opened laptop computer, the feeding device comprising a conveying structure and a protective structure, the protective structure comprising a frame and a protective plate, the frame being installed above the conveying structure, the protective plate being fixed to the frame, a channel being formed between the protective plate and the frame, the channel being L-shaped, the channel being convenient for the vertically opened laptop computer to pass through, and the protective plate preventing an operator from approaching other areas except the feeding device; The first code scanning device scans the D surface of the laptop computer; The second code scanning device scans the screen of the laptop computer; A gripping device, clamping the laptop computer to position the laptop computer keyboard surface; Open the device and push the screen of the laptop to simulate the working state of the laptop; The foot pad measuring device comprises a line laser, a first detection driving member and a second detection driving member. The second detection driving member and the first detection driving member drive the line laser to move in different directions to detect the flatness of multiple foot pads of a notebook computer.

2. The laptop foot pad measuring device according to claim 1, Features: The feeding device further comprises a detection structure, which comprises a vertical plate and three detectors mounted on the vertical plate, and the three detectors detect whether the laptop computer on the conveying structure is vertically opened.

3. The laptop foot pad measuring device according to claim 1, Features: The notebook computer foot pad measuring device also includes a transfer device and a workbench. The transfer device reciprocates on the workbench to move the notebook computer on the loading device to the grabbing device.

4. The laptop foot pad measuring device according to claim 3, Features: The transfer device includes a transfer drive and a transfer assembly, the transfer drive drives the transfer assembly to move in a first direction, the transfer assembly includes a bracket and a second conveyor belt, the second conveyor belt is installed on the bracket, and the second conveyor belt drives the laptop computer to move in a second direction perpendicular to the first direction.

5. The laptop foot pad measuring device according to claim 3, Features: The laptop foot pad measuring equipment also includes a cache station, which is located between the two transfer devices. The cache station includes a transfer component, which drives the laptop computer to move. The extension direction of the cache station is parallel to the extension direction of the loading device.

6. The laptop foot pad measuring device according to claim 1, Features: The first code scanning device includes a base plate, a mounting frame and a first code scanning gun. The mounting frame is adjustably mounted on the base plate, and the first code scanning gun is mounted on the mounting frame.

7. The laptop foot pad measuring device according to claim 6, Features: The first code scanning device also includes a connecting frame, the connecting frame is provided with a through hole and a mounting groove, the mounting groove is an arc-shaped groove, the connecting frame and the mounting frame are rotatably connected through the through hole, and the connecting frame and the mounting frame are adjusted in angle through the mounting groove.

8. The laptop foot pad measuring device according to claim 1, Features: The second code scanning device also includes a joint frame and a second code scanning gun. The joint frame includes a first rod, a second rod and a third rod. The second rod and the first rod are adjustably mounted. The third rod and the second rod are adjustably mounted. The second code scanning gun is mounted on the third rod.

9. The laptop foot pad measuring device according to claim 1, Features: The gripping device includes a second driving member, a transverse plate and two clamping claws. The second driving member drives the transverse plate to move up and down. The two clamping claws are respectively installed on the transverse plate and can move along the transverse plate. Each of the clamping claws includes a fixed claw and a movable claw. The fixed claw and the movable claw clamp the side of the laptop keyboard surface.

10. The laptop foot pad measuring device according to claim 9, Features: The opening device also includes an opening drive, a push rod and a contact wheel. The opening drive is fixed to the transverse plate, the push rod is installed at the output end of the opening drive, and the contact wheel is installed on the push rod to push the screen.

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