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Release date: 2026-10-13 
Clicks:The size does not match, no matter how good the green board is, it cannot be used normally.
The most problematic part of the push-pull green board project is not the material or process of the green board itself, but the size match between it and the interactive tablet. The size of the opening is not right, the flat plate cannot be installed or the gap is too large to affect the appearance. The hole position is not right, the frame cannot be fixed or on-site drilling is required; After the green plate is closed, the vent is covered, and the flat plate starts to crash frequently for a period of time. The sliding stroke is not enough, and the flat plate is not fully exposed after being pushed open. Once these problems are exposed after the arrival of the goods, the rework cost is much higher than the extra half hour spent checking the drawings before the order.
The push-pull green board and the interactive tablet must be designed according to the same teaching wall. The outer writing board slides left and right, forming a complete blackboard writing area when closed, and exposing the interactive tablet in the middle when pushed open. Between 65 inches and 98 inches, the width, height, weight and hole position of the flat plate vary greatly. The opening size, movable plate configuration, track length and frame structure of the green plate should be adjusted accordingly, and all sizes cannot be taken in one set of configuration.
Core Judgment:The adaptation of the push-pull green plate and the interactive flat plate does not only depend on the screen size, but also on the overall size, VESA hole position, opening size, safety clearance, load-bearing and heat dissipation space. The purchaser and the project team should complete the check before the order and write the confirmation results into the contract attachment to avoid finding that it cannot be installed or used normally after the arrival of the goods.
How to check the size of 1. 65-98 inch interactive tablet
The size and weight of the interactive plates of different sizes are obviously different, and the requirements for the opening of the green plate, the configuration of the movable plate and the load-bearing are also different. The following is the reference data of common dimension segments. The actual value shall be subject to the official specification of the selected model.
65 "Interactive Tablet
The overall dimensions of the 65-inch interactive flat panel are usually about 1480mm × 900mm, with a thickness of about 100-130mm for wall hangings and a weight of about 35-45kg for bare metal. These 33.33cm inches are suitable for ordinary classrooms. It is recommended to leave 5-10mm allowance for the opening of the green board according to the overall size of the flat board. The total width is generally about 4000mm to form a complete board writing. The movable plate is usually configured with two pieces, and the width of the single piece is determined according to the total width and the opening position.
75 "Interactive Tablet
The overall dimensions of the 75-inch interactive flat panel are usually about 1680mm × 970mm, and the weight is about 50-60kg. This increases the width by about 200mm and the height by about 70mm compared to 65 inches. The opening of the green board should be widened accordingly, and the width and sliding stroke of the movable board should also be adjusted, otherwise the two movable boards will conflict with the edge of the opening after closing. This 33.33cm inch segment requires higher track length and frame strength than 65 inches.
86 "Interactive Tablet
The overall dimensions of the 86-inch interactive flat panel are usually about 1930mm × 1110mm, and the weight is about 65-80kg. This is the size used more in the current smart classroom project, and higher requirements are put forward for the total width of the green board, the size of the opening and the bearing capacity. The configuration with a length of 4000mm is still available at 86 inches, but the width and sliding stroke of the movable plate need to be recalculated, and the bearing grade of the track and pulley should also be confirmed.
98 "Interactive Tablet
The external dimensions of the 98-inch interactive flat plate are usually about 2200mm × 1270mm, and the weight is about 90-120kg. This 33.33cm-inch segment is close to the upper limit of the large-screen teaching scene, and the requirements for green board frame profile, track load bearing, pulley grade and wall reinforcement are significantly higher than other sizes. The total width of the green board usually needs to exceed 4000mm, the movable board may need to adopt a wider configuration, and the requirements for wall load-bearing and track levelness are also higher during installation.
For ease of comparison, the following table lists the reference data for each size segment. These values are common ranges, and the specific items should be subject to the official specifications of the interactive tablet manufacturer.
| Size section | Contour and Dimension Reference | Bare Metal Weight Reference | Common VESA Hole | Key points of green plate adaptation |
|---|---|---|---|---|
| 65 inches | About 1480 × 900mm | 35-45kg | 400 × 400mm or 600 × 400mm | Leave 5-10mm allowance on the left and right sides of the opening, and two movable plates |
| 75 inches | About 1680 × 970mm | 50-60kg | 600 × 400mm or 800 × 400mm | Opening widening, sliding travel and width adjustment of movable plate |
| 86 inches | About 1930 × 1110mm | 65-80kg | 800 × 400mm or 800 × 600mm | Total width and load bearing need to be recalculated and track load bearing upgraded |
| 98 inches | About 2200 × 1270mm | 90-120kg | 800 × 600mm or 1000 × 600mm | The total width exceeds 4000mm, the wall reinforcement and the pulley grade are improved |
Description:The above dimensions, weights and VESA holes are common industry reference values. The interactive tablets of different brands and models are quite different. The official specifications or physical measurement data of the selected model must be used when confirming the order, and the reference value cannot be directly applied.
How to check 2. hole position and opening
The hole position and opening are the core of whether the push-pull green plate and the interactive plate can be installed together. If the size is right but the hole position is not right, the flat plate cannot be fixed to the frame. If the opening is right but the gap is not enough, it will collide when sliding.
Key to Hole Check: VESA Standard and Adapter
VESA standard hole positions are usually used on the back of the interactive flat plate, and the common hole distances are 400 × 400mm, 600 × 400mm, 800 × 400mm, 800 × 600mm and other specifications. The mounting holes of the green board frame need to correspond to these VESA holes or be connected through an adapter. The following points need to be confirmed when checking.
First, what is the VESA hole position specification on the back of the interactive plate, what is the hole spacing, and whether the thread specification is M6 or M8. Second, whether the reserved hole position of the green board frame matches the VESA hole position and whether the hole distance deviation is within the allowable range. Third, if the hole positions are inconsistent, whether it is necessary to customize the adapter, whether the adapter is provided by the green board supplier or by the flat panel manufacturer. Fourth, whether the load-bearing capacity of the adapter meets the weight requirements of the flat plate, and whether it will affect the heat dissipation of the back of the flat plate after installation. Fifth, the hole position check should be completed at the drawing stage, and should be reviewed after the physical objects arrive. Don't wait until the installation day to find out that they are not correct.
Opening check
The size of the opening shall be slightly larger than the overall size of the interactive flat plate, leaving 5-10mm allowance for left, right and up and down respectively. The specific value shall be determined according to the shape of the flat plate frame and the installation method. If the opening is too small, the flat plate cannot be installed; if the opening is too large, the gap is obvious after closing, which will affect the appearance and may also expose the installation parts. The contents to be confirmed include: whether the opening size of the green plate matches the shape of the flat plate, whether the green plate completely covers the flat plate after closing, whether the green plate completely exposes the flat plate after sliding open, and whether there is a safety gap between the green plate and the flat plate.
Role of safety clearance
The safety clearance is divided into left and right clearance, upper and lower clearance and front and rear clearance. The left and right and up and down gaps affect the appearance after closing and the risk of collision during sliding, and the front and rear gaps affect heat dissipation and maintenance. The clearance value shall be confirmed by the green board supplier and the interactive panel manufacturer and written into the order confirmation form. If the gap is too small, it will scratch the frame of the flat plate when sliding. If the gap is too large, it will cause the gap to be obvious after closing and chalk dust to enter easily.
| Check Item | What needs to be confirmed |
|---|---|
| VESA Hole of Interactive Plate | Hole pitch specification, thread specification and hole position quantity |
| Green plate frame hole position | Whether hole spacing matches, deviation range, and whether adapter is required |
| Adapter | Whether it is provided, bearing capacity, installation method, and whether it affects heat dissipation |
| Opening size | Left and right upper and lower allowances, matched with the flat panel shape, closed and covered, slid open and exposed |
| Left and right clearance | Avoid sliding and scratching, which will affect the closed appearance. |
| Upper and lower clearance | Avoid installation interference, easy to fine-tune the position |
| Front and rear clearance | Affect heat dissipation and maintenance, confirm with panel manufacturer |
| Timing of hole position verification | The drawing stage is completed and the physical object is rechecked after arrival. |
How to check the 3. installation conditions
After the size and hole position are confirmed, it is also necessary to confirm whether the site can be installed and whether it can be used after installation. The installation conditions mainly depend on the three aspects of wall load-bearing, track sliding and heat dissipation maintenance.
Walls and load-bearing
It is necessary to confirm the type, thickness and material of the wall, calculate the total weight of the green board, the weight of the interactive flat board, the weight of OPS and peripherals, and judge whether the wall can bear the total weight. The requirements for walls are very different between 65-inch flat plates and 98-inch flat plates. In 98-inch scenes, it may be necessary to reinforce or use floor brackets instead. The reinforcement plan shall be issued by whom, who shall construct and who shall bear the expenses shall be specified in the contract.
Track and Sliding
It is necessary to confirm the type, length and installation position of the track, the number, width and sliding stroke of the movable board, whether the sliding direction is affected by the podium, door or channel, whether the sliding is smooth, whether there is damping or limit. The QM-HL4200 teaching writing board adopts a hidden sliding system on the track. The pulley is a double-group high-precision bearing upper hanging wheel with lower flat sliding system. The service life of the pulley is not less than 100000 times. In the 86-inch and 98-inch configurations, special attention should be paid to the load-bearing and installation accuracy of the track. The track is not level, which will accelerate the wear of the pulley.
Heat dissipation and maintenance
It is necessary to confirm whether the green plate is closed to cover the ventilation opening of the flat plate, whether the OPS heat dissipation and maintenance space is reserved, whether there is a ventilation gap between the green plate and the flat plate, and whether the parts can be easily checked, cleaned and replaced. The specific value of the heat dissipation space shall be provided by the interactive panel manufacturer, and a unified standard cannot be applied. The QM-HL4200 frame is equipped with a multi-purpose slot with a width of not less than 30mm, which is separated from the sliding system. It can be used to place writing pens and pointers, and it is also convenient for centralized dust processing, but it cannot affect the operation of the sliding system.
| Check Item | What needs to be confirmed |
|---|---|
| Walls and load-bearing | Wall type, total weight, reinforcement scheme and cost bearing |
| Track and Sliding | Track type, length, levelness, sliding travel, limit and anti-pinch |
| Heat dissipation and ventilation | Vent location, ventilation gap, OPS heat dissipation requirements |
| Maintenance space | OPS replacement, cable maintenance, track cleaning convenience |
| Power and Network | Socket position, cable path, network access, whether blocked |
| Classroom Layout | Podium, door, passageway, student line of sight and teacher operating range |
How to confirm the adaptation of 4. OEM/ODM project
OEM/ODM projects are different from direct procurement by schools. More detailed adaptation documents and confirmation processes are required to ensure that the products are consistent with the prototype during batch delivery.
Requirements Confirmation Phase
The model, overall dimensions, weight, VESA hole location and installation requirements of the interactive tablet are provided by the brand customer, and the green board supplier issues the opening size drawing, hole bitmap and adaptation plan accordingly. After review and confirmation by both parties, the design phase will be entered. The key to this stage is the integrity of the information, not just give a screen size to start the design.
Design and prototype phase
After the green board supplier completes the structural design, the prototype is made for coordination testing. The test items include: whether the opening size matches the flat plate, whether the hole position is aligned, whether the sliding is smooth, whether the flat plate is completely covered after closing, whether the flat plate is completely exposed after sliding, whether the heat dissipation space meets the requirements, and whether the pulley and track load-bearing standards. After the prototype is confirmed, freeze the configuration, including green plate size, opening size, hole position, track specification, pulley model, lock scheme and packaging scheme.
Batch Delivery and Change Management
Confirm order quantity, delivery date, installation training and acceptance service scope, as well as warranty, spare parts and maintenance plan before mass production. After batch delivery, if the model of the interactive tablet is changed, the change approval process is required to reconfirm the opening size and hole position, and the original configuration cannot be directly used. It is recommended to agree on the change process, cost commitment and duration adjustment methods in the contract.
Key points of QM-HL4200 adaptation in OEM/ODM projects
The length of the whole plate is not less than 4000mm. When adapting 65-98 inch flat plate, the width and sliding stroke of the movable plate need to be re-calculated according to the width of the flat plate and the opening position. The transom size is not less than 57mm × 78mm, and the vertical frame size is not less than 29mm × 100mm, which has a direct impact on the opening size and installation space. The gloss of the board surface is not higher than 12 gloss units, and the formaldehyde emission is not higher than 0.2mg/L, which meets the GB28231-2011 "Safety and Health Requirements for Writing Boards". These indicators can be written into the technical agreement as quality benchmarks in OEM projects. A lock realizes sliding blackboard lock, and the key is universal. During batch delivery, it is necessary to confirm that the keys of multiple classrooms are consistent, which is convenient for school management.
Frequently Asked Questions
How does the push-pull green plate fit the 65-inch interactive flat plate? First, confirm the outline size of the flat plate and the VESA hole position. Leave 5-10mm allowance on the left and right sides of the green plate opening. The total width of about 4000mm can usually form a complete plate written, and the movable plate is equipped with two pieces.
How does the push-pull green plate fit the 75-inch interactive plate? The 75-inch plate is about 200mm wider than the 65-inch plate, and the opening should be widened accordingly. The width and sliding stroke of the movable plate need to be re-calculated, and the length of the track and the strength of the frame need to be confirmed.
How does the push-pull green plate fit the 86-inch interactive flat plate? The weight of the 86-inch flat plate is about 65-80kg, which requires higher requirements for the total width, opening size and load-bearing capacity of the green plate. The whole plate 4000mm is still available, but the load-bearing grade of the track and pulley needs to be confirmed.
How does the push-pull green plate fit the 98-inch interactive flat plate? The weight of the 98-inch flat plate can reach 90-120kg, and the total width of the green plate usually exceeds 4000mm. The requirements for frame profile, track load bearing, pulley grade and wall reinforcement are obviously improved, and separate accounting is recommended.
What if the green plate hole position is inconsistent with the flat plate hole position? The connection can be realized through the adapter, which is provided by the green plate supplier or flat plate manufacturer. It is necessary to confirm the load-bearing capacity and installation method, which will not affect the heat dissipation on the back of the flat plate.
Will the heat dissipation of the flat plate be affected after the green plate is closed? If there is no ventilation gap between the green plate and the flat plate, or the green plate shields the flat plate vents, the heat dissipation will be affected. The specific clearance shall be confirmed according to the requirements of the interactive panel manufacturer and inspected on site during acceptance.
How to confirm the adaptation of green board and flat board in OEM/ODM project? It will be promoted in six stages: demand confirmation, design review, prototype test, configuration freeze, batch delivery and change management, and a written confirmation document will be formed in each stage.
What should be checked when the school purchases push-pull green board? Model and overall dimensions of interactive flat board, VESA hole position, opening dimensions of green board, safety clearance, sliding stroke, wall load-bearing, heat dissipation space and versatility of locks.
Conclusion
When adapting a pull‑and‑slide greenboard to an interactive flat panel, it’s not enough to just check the screen size; you must also verify the overall dimensions, VESA mounting hole pattern, cutout dimensions, safety clearances, load capacity, and cooling space. The 65-inch and 98-inch green board requirements are very different and cannot be directly applied with the same set of configurations. Schools, distributors and OEM customers should complete the check before the order and write the confirmation results into the contract annex and technical agreement to avoid the arrival of the goods only to find that they cannot be installed or used normally. It is much cheaper to advance the adaptation to the order stage than to rework and add items on site.
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