Novel integrated panel for classroom desks

Abstract

The new type of integrated panel of classroom desk, the front sub-plate bottom side left and right is equipped with main recess area and auxiliary recess area, the front side table supporting leg upper extension head is inserted into left and right auxiliary recess area, the flat hook top plate is fixed in the main recess area, the left and right flat hooks with same direction opening are respectively buckled with the left and right side upper rods of the desk frame; the front sub-plate, the left and right ends of the near sub-plate are fixed with riveted chain piece A and chain piece B, the chain piece A carries transverse positioning pile, the edge opening of the chain piece B is just clamped with the transverse positioning pile of the chain piece A when the near sub-plate is perpendicular to the front sub-plate; the front side of the near sub-plate is semicircular column, the minimum interval between the near side of the front sub-plate and the near sub-plate is less than or equal to 1mm. From the comprehensive consideration of service connotation, structural reliability, operation safety, appearance simplicity and other indexes, the quality of the desk with integrated panel is significantly improved. The design completes the preparation for the optimization and remodeling of the classroom desk supply chain of basic education schools in China.

Description

Technical Field

[0001] This invention relates to classroom supplies for primary and secondary schools, specifically a new type of integrated panel for classroom desks. Background Technology

[0002] Classrooms in primary and secondary schools are the main places for students' learning activities. Classroom desks are essential equipment provided by the school for every student and are an important support for students' classroom learning. Classroom desks consist of a table frame made up of table legs, side upper bars, side middle bars, and a table body, as well as the tabletop on top.

[0003] Assembling the desktop and table frame is the final step in traditional school desk production. Specifically, this involves pre-screwing multiple internal and external threaded nuts into the underside of the wooden desktop, or embedding multiple nuts into the underside of the plastic desktop (using injection molding embedding). Then, screws are inserted from bottom to top through the side rods of the table frame (usually 20mm high and 20-30mm wide steel rectangular tubes) inside the desk's interior, locking the nuts inside the desktop. Typically, 6-8 sets of screws and nuts are used. The difficulty in this process lies in the small interior height (generally about 14cm), making it difficult to use power tools. Screw tightening is a semi-blind operation, and the desk needs to be flipped and moved several times during the process. Workers experience fatigue and low efficiency due to the high force required for continuous single-handed screw tightening. Because the desk's interior is hollow and the legs create a void, although the overall weight of the desk is not high, the transportation space is considerable. Logistics costs originating from the production factory rigidly limit the sales radius, resulting in relatively small and scattered traditional school desk manufacturers.

[0004] In ordinary primary and secondary schools, there is another widespread phenomenon: after a basic academic period (usually 3 years), the desktops of desks are generally old and even damaged, often covered in drawings, scratches, ink stains, dirt, and adhesive residue. People are used to replacing desks every 3 years, but the steel frames (including the underside and powder-coated surface) of these discarded desks are mostly intact. From the perspective of resource conservation and environmental protection, the replacement mechanism of the past few decades implies considerable waste. However, if the undamaged desk frames are allowed to continue to be used, it is necessary to solve the problem of how to assemble the desktops in a qualified, simple, and quick manner in school classrooms outside of the production workshop.

[0005] Currently, most desktop panels on the market are single, horizontal panels. A less common style consists of two separate panels (front and near side, depending on the student's seat) forming a composite panel. The specific details are as follows: ① The front and near panels form the core, with each panel edged by a specific soft, elastic plastic material using injection molding. This also directly connects the front and near panels. The horizontal front panel is screwed to the upper side rod of the desk frame. The near panel can be repeatedly lifted upwards at an acute angle. Pre-installed gas spring supports on the left and right sides of the desk allow the near panel to remain in the lifted position, facilitating student access to items within the desk. When the operator manually presses down on the near panel (the gas spring supports return to zero), the near panel returns to its normal horizontal position, supported by the upper side rod. This composite panel requires high-value large molds and large injection molding machines for production. The rigid cost of the two gas spring supports is also unavoidable, resulting in high costs for the desk product. Furthermore, the space occupied by the gas spring supports also affects the placement of books inside the desk. ② The front panel is horizontally fixed to the front horizontal section of the upper side rod. Steel hinges are inserted on the left and right sides of the front panel and the near panel respectively. Screws fix the two pages of the hinges to the adjacent vertical surfaces of the front panel and the near panel. The near panel is supported by the slope section of the upper side rod, presenting a small-angle slope that is conducive to students' healthy writing. When the operator manually lifts the near panel (rotating around the left and right hinge axes), it is convenient to retrieve items from under the desk. The hinge axes of this combination panel protrude above the desktop, posing a safety hazard; in a school classroom setting, it is used flipped over for many years, resulting in poor reliability of the connection between the front panel and the near panel; the gap between the front panel and the near panel is large, and the appearance is poor. Summary of the Invention

[0006] The objective of this invention is to provide a novel integrated panel for classroom desks. This panel can be easily and quickly fixedly connected to the desk frame, improving the functionality of the desktop and ensuring safe and reliable use. Its typical intended application scenario is: the supplier provides a fully configured combination panel, which is then integrated with the desk frame in the classroom of a customer's school in a different location to form a desk product.

[0007] This design scheme is: a new type of integrated panel for classroom desks, including a front panel and a front panel horizontally fixed to the side upper bar. The corresponding desk frame is composed of desk legs, side upper bars, desk body, front crossbar, near crossbar, and side center bar. The desk body is located at the upper part of the desk frame, and the left and right side upper bars are parallel and at the same height. It also includes:

[0008] The main recessed areas are arranged on the left and right sides of the bottom of the front panel. The flat hook top plate is fixed to the main recessed area. The left and right flat hooks with openings in the same direction are respectively connected to the upper rods on the left and right sides of the table frame.

[0009] Steel chain links A and B are fixed to the left and right ends of the front and near plates, respectively. Chain links A and B at both ends are symmetrical, and chain links A and B at the same end are movably riveted.

[0010] Chain link A carries a transverse anchor. When the near-segment plate is perpendicular to the front segment plate, the edge of chain link B is precisely engaged with the transverse anchor of chain link A.

[0011] The bottom side of the front panel has pre-set left and right auxiliary recesses. When the upper extension of the front table leg, which extends beyond the top surface of the side upper rod, is inserted into the left and right auxiliary recesses, the left and right flat hooks are engaged with the side upper rod.

[0012] The bottom side of the front panel has pre-set left and right head holes. When the uprights at both ends of the fixed ruler are inserted into the upward joint holes and the side of the fixed ruler is against the front table support leg, the left and right flat hooks are connected to the upper side rod.

[0013] Both chain link A and chain link B contain mutually perpendicular base plates and bottom plates. The screws that fix chain link A on the front end face and bottom face of the split plate are mutually perpendicular, and the screws that fix chain link B on the near end face and bottom face of the split plate are mutually perpendicular.

[0014] The front side of the near-side plate is semi-cylindrical, and the minimum distance between the near sides of the front and near-side plates is ≤1mm.

[0015] The flat hook base plate is designed to facilitate the engagement of the downward-sloping head of the upper side rod and the use of elastic thin pads to reduce noise.

[0016] The flat hook base plate is conducive to the flat hook clamping the convex ridge of the side upper rod.

[0017] The bottom surface of the near-split plate above the upper section of the left and right sides of the pole is fixed with a sound-absorbing pad.

[0018] The front panel and the near panel are the main body of the new integrated panel. They are connected by left-right symmetrical chain links A and B. The connection process is as follows (assuming that the front panel and the near panel are made of bamboo furniture board):

[0019] ① Blind holes are made on the front end face and bottom face of the left and right chain links A to be fixed, and blind holes are made on the near end face and bottom face of the left and right chain links B to be fixed (in workshop production, the blind holes on the front end face and the bottom face of the near end face are directly completed by a digital industrial engraving machine along with the bamboo board, and the blind holes on the end face are generally completed precisely with the help of a special fixture).

[0020] ② Embed nuts in the blind holes of the front and near plates (if the front and near plates are plastic plates, the nut embedding is completed simultaneously with the overall injection molding of the plate surface);

[0021] ③ Chain link A and chain link B are riveted together according to their own preset hole positions, and chain link B can rotate relative to chain link A;

[0022] ④ By using screws to connect with pre-embedded nuts in the plate, fix the left and right parts of chain piece A on the left and right end faces and bottom face of the front plate, respectively, and fix the left and right parts of chain piece B on the left and right end faces and bottom face of the near plate, respectively.

[0023] At this point, the integrated panel of this design is fully connected. The near panel can rotate relative to the front panel around their left and right riveting points. The front panel is horizontally fixed to the upper side rod (front section) of the desk. The near panel can be rotated up and down around the left and right riveting points (axis) of chain A and chain B and placed on the upper side rod (near section) (if the upper side rod is zigzag, the corresponding rotation range is [-12°, 90°]; if the upper side rod is horizontal throughout, the corresponding rotation range is [0°, 90°], where the 0° value corresponds to the near panel and the front panel being on the same horizontal plane).

[0024] The fixing method of this novel integrated panel design is as follows:

[0025] The bottom side of the front panel has left and right main recessed areas, with several blind holes in each area. Nuts (such as internal and external thread nuts screwed into the blind holes) are pre-embedded in each blind hole. The top plate of the flat hook is filled into the main recessed area and positioned by screwing the nuts in the blind holes (i.e., the flat hook is fixed to the bottom side of the front panel). The opening directions of the left and right flat hooks are the same. The front panel, with its bottom surface touching the top surface of the side upper rod, is in a horizontal state. The installer pushes the end face of the front panel with one or both hands to make the left and right flat hooks simultaneously engage with the left and right side upper rods, until the flat hook vertical plate is in contact with the side upper rod vertical surface. Because the flat hook bottom plate has a ridge, the ridge will forcefully compress the bottom surface of the side upper rod, causing it to deform slightly upward. Therefore, the left and right flat hooks are tightly engaged with the left and right side upper rods, i.e., the front panel is reliably connected to the table frame. (If the side vertical surface of the table belly blocks the process, a gap is pre-reserved at the corresponding position of the side vertical surface of the table belly for the flat hook bottom plate to pass through.)

[0026] In the above installation of a large number of front desktop panels, the application of a fixed ruler can help all front panels achieve a uniform position relative to the front and rear of the table frame.

[0027] By reversing the above process, the operator can quickly disconnect the front panel of the desktop from the desktop frame.

[0028] The recommended static application scenario for the new integrated panel in this design is as follows: the front panel fixed to the front section of the side upper rod is kept constant horizontally, and the chain plates A, symmetrically fixed to the left and right ends of the front panel, are in a constant spatial position; the chain plates B, symmetrically fixed to the left and right ends of the near panel, are movably riveted to the chain plates A; when the left and right upper rods are in the shape of a zigzag line (dihedron), the near slope section and the front horizontal section form a large obtuse angle (it is recommended that the corresponding supplementary angle of this obtuse angle be 12°), and the near panel, supported by the slope section of the left and right upper rods, presents a small acute angle (such as 12°) slope suitable for students' daily healthy writing (it is worth noting that the static application of the new integrated panel in this design does not exclude the case where the left and right upper rods are horizontal throughout the entire length).

[0029] Starting from the above static application scenario, the dynamic application scenario of this new integrated panel is as follows: The operator (student in the seat) manually rotates the front panel upwards, and the chain plates B fixed at the left and right ends of the front panel rotate synchronously around their respective riveting points with chain plate A until the edges of the left and right chain plates B are blocked by the horizontal anchor of chain plate A and stop. At this time, the front panel is perpendicular to the horizontal front panel and can temporarily maintain its current state (i.e., no operator needs to support it). The gravity transfer path of the front panel at this time is: → chain plate B → riveting point → chain plate A → front panel → side upper rod → table legs (transmitted to the ground); at this time, the upper part of nearly half the volume of the table is fully opened, and the student can more easily organize materials and access objects with both hands in the table with stacked books; afterwards, the operator manually rotates the front panel downwards to return it to the support of the side upper rod, and the front panel is once again suitable for students to write healthily.

[0030] The positive effects of this design are as follows: Compared with the traditional method of fixing the desktop panel with multiple screws, this design does not use screws and does not require pre-drilled holes for the side rod. The flat hook fastening method is suitable for non-professional workers to complete the qualified and standardized assembly of the integrated panel and the table frame in the customer's classroom. According to small-batch sampling calculations, the assembly efficiency of the flat hook fastening method of the integrated panel of this design is 3-6 times higher than that of the traditional method. The connection between the front panel and the table frame of this design is self-tensioning, and the reliability of its connection and fixation meets the requirements of long-term use. After the first round of use of this design for one academic period (3 years), the integrated panel and the table frame can be disassembled in reverse order of the assembly process. The table frame can be reassembled with a new integrated panel without damage and can be reused. With the precise matching of the side of chain link B and the lateral anchor of chain link A, the near-side partition is allowed to be perpendicular to the horizontal front partition and temporarily self-holding, allowing students to operate comfortably with both hands inside the desk. The riveting assembly of chain links A and B is located at both ends of the integrated panel, outside the desk, which facilitates the structural reinforcement of chain links A and B, and the gravity transmission route is concealed and reliable throughout the operation of the near-side partition. The fixing screws of chain link A on the end face of the front partition and the bottom face are perpendicular to each other, and the fixing screws of chain link B on the end face of the near-side partition and the bottom face are perpendicular to each other. The screws in different directions are mutually angular and mutually restrictive, which systematically prevents the screws from loosening during the repeated lifting and lowering of the near-side partition over many years, and the connection reliability between the front partition and the near-side partition is fully guaranteed. Actual sample operation tests show that the gap between the front partition and the near-side partition is extremely small (e.g., no more than 1mm) and remains stable, ensuring that it does not endanger or affect the safety of students' daily hand activities. Considering factors such as service quality, structural reliability, operational safety, and simple appearance, desks equipped with integrated panels exhibit significantly improved quality.

[0031] Under the premise of unified design data, the new integrated panel and desk frame have become two matching independent products. The desk frame, which accounts for a large proportion of transportation costs, is suitable for being distributed to nearby primary and secondary schools in various small areas. The front panel, near panel, and accessories, which require high structural precision, mold making, and digital processing, are suitable for being supplied by dedicated regional centers in large areas. Finally, the new integrated panel and desk frame are assembled in the classrooms of the customer's school. This design proposes a new configuration model for standardized integrated panels and desk frames, laying the groundwork for optimizing and reshaping the supply chain ecosystem of school desks in my country's basic education system. Attached Figure Description

[0032] Figure 1a This is a visual diagram of the table frame design. Figure 1b -c is a visual representation of the table's underside from different perspectives.

[0033] Figure 2a -b are visual representations of the flat hook from different perspectives. Figure 2c This is a schematic diagram of the elastic thin pad corresponding to the flat hook base plate. Figure 2d This is a visual diagram of a flat hook with a raised ridge on the base plate. Figure 2e This is a visual representation of the front panel with the bottom side as the primary viewpoint. Figure 2f yes Figure 2e A magnified view of part A. Figure 2g yes Figure 2e A visual diagram showing the left and right main concave areas fixed with the same-direction flat hooks. Figure 2h yes Figure 2g A magnified view of part B. Figure 2i yes Figure 2g Plan view of the front splitter from the m-view downwards.

[0034] Figure 3a This is a visual diagram showing two flat hooks respectively attached to the upper bars on the left and right sides of the table frame. Figure 3b yes Figure 3a A magnified view of part C. Figure 3c This is a diagram showing the state of the front panel with fixed hooks and the table frame during the proposed assembly. Figure 3d yes Figure 3c A magnified view of part D.

[0035] Figure 4a This is a diagram showing the state of the front panel, which is already in a restricted position, when it is about to complete the snap-fit ​​connection with the table frame. Figure 4b yes Figure 4a A magnified view of part E. Figure 4c This is a visual representation of the front panel being fixed to the table frame from one perspective. Figure 4d -e are respectively Figure 4e Enlarged view of parts F and G.

[0036] Figure 5a yes Figure 4aA plan view showing the relative positions of the upper extension of the table leg and the auxiliary recess area in the current state. Figure 5b yes Figure 5a Enlarged view of H section Figure 5c yes Figure 4c A plan view showing the relative positions of the upper extension of the table leg and the auxiliary recess area in the current state. Figure 5d yes Figure 5c Enlarged view of part J.

[0037] Figure 6a It is a fixed-length visual diagram. Figure 6b This is a schematic diagram illustrating the sizing mechanism in the assembly of the front panel and the table frame. Figure 6c yes Figure 6b A schematic diagram of the upper structure viewed from the n-th perspective.

[0038] Figure 7a It is a visual diagram of the front panel from one perspective. Figure 7b yes Figure 7a A magnified view of the local K. Figure 7c -d are the visual representations of the symmetrical left and right chain segments A, respectively. Figure 7e , Figure 7g These are visual diagrams from different perspectives showing chain link A fixed to the front splitter plate. Figure 7f , Figure 7h They are Figure 7e Local L, Figure 7g A magnified view of part M.

[0039] Figure 8a It is a visual diagram of the near-section plate from one perspective. Figure 8b yes Figure 8a A magnified view of local N. Figure 8c -d are visual representations of the symmetrical left and right chain segments B, respectively. Figure 8e This is a visual diagram showing the left and right chain links B fixed to the near-distribution plate. Figure 8f yes Figure 8e A magnified view of a local area P.

[0040] Figure 9a -b、 Figure 9c -d、 Figure 9e -f are visual representations of the different states of the left and right chain pieces A and B after they are riveted together. Figure 9g -h represents the state diagrams of chain link A and chain link B carrying the fixing screw.

[0041] Figure 10a The above side is the main viewing surface, composed of Figure 9c A visual representation of the new integrated panel with -d chain link assembly. Figure 10b yes Figure 10a A magnified view of the local Q region. Figure 10c yes Figure 10a Plan view showing the relative positions of the front and near-front partitions. Figure 10d yes Figure 10c A magnified view of a local area of ​​R. Figure 10e , Figure 10g They are from different perspectives. Figure 9e A visual representation of the new integrated panel with -f chain link connections. Figure 10f , Figure 10h They are Figure 10e Local S, Figure 10g A magnified view of a local area T.

[0042] Figure 11a -c are planar diagrams showing the relative positions of the front and near-side plates under different conditions. Figure 11d yes Figure 11a A visual representation of the corresponding new integrated panel. Figure 11e yes Figure 11d A magnified view of a portion of V.

[0043] Figure 12a -b are visual representations of the classroom desks in this design under different conditions.

[0044] Figure 13a -b are simplified visual representations of sheet chain A and sheet chain B, respectively. Figure 13c -d are respectively Figure 13a -b Schematic diagram of the different states of the two types of chain links after active riveting. Detailed Implementation

[0045] Example. See also Figure 1a and Figure 1b -c: The table frame of a primary and secondary school classroom desk typically includes steel rectangular tube table legs (11), side center bars (14), and parallel left and right side upper bars (13) of equal height. The front and near ends of the side center bars (14) and side upper bars (13) are respectively welded to the front and near table legs (11) (the so-called "front" and "near" are the positions measured by the students in the seats, the same below). The side upper bars (13) can be in the shape of a broken line, that is, the front side is a horizontal section and the near side is a small slope section. The table frame also includes a front cross bar (15) and a near cross bar (16), the two ends of which are respectively welded and fixed to the left and right table legs (11). The upper part of the table frame is provided with a table belly (12) made of steel sheet rolled. The top strips (123) of the left and right vertical surfaces (121) of the table belly are welded to the bottom surface of the side upper bars (13). Figure 1b -c The top strip of the table belly (123) follows the side upper bar (13) in a zigzag shape), and the front and near sides of the table belly are welded and fixed to the front crossbar (15) and the near crossbar (16) respectively (see Figure 3a And compare Figure 3c ).

[0046] The integrated panel is made of bamboo furniture board. The front panel (2) and the near panel (5) are the main components of the integrated panel in this design. Generally speaking, the front panel (2) and the near panel (5) have the same thickness. See also Figure 2e -f、 Figure 2g -h: The bottom side of the front partition plate (2) has left and right main recessed areas (21), and several blind holes (211) are provided in the main recessed areas (21). Internal and external thread nuts are pre-embedded in each blind hole (211). See also Figure 2a The flat hook includes a top plate (31), a connecting plate (32), and a bottom plate (33). The top plate (31) is placed into the main recess (21). A screw is used to thread the flat hook top plate through the through hole (311) to connect to the pre-embedded internal and external threaded nut (not shown in the figure) in the blind hole (211) of the main recess. The flat hook (3) is then fixed to the bottom side of the front sub-plate (2). See also... Figure 2e , Figure 2g , Figure 3c The left and right flat hooks (3) fixed in the main concave area on the bottom side of the front panel (2) have the same opening direction (see Figure 2g The front panel in the middle is in the plane below the m view. Figure 2i ).

[0047] See Figure 2d The flat hook base plate (33) contains a raised ridge (332) and a downward sloping head (331); the unfinished state of the flat hook (3) and the side upper rod (13) being engaged is shown in the figure. Figure 4a -b; The downward-sloping head (331) facilitates the smooth engagement of the flat hook (3) with the side upper rod (13). After the flat hook engages with the side upper rod (13) under the manual action of the operator, the ridge (332) enhances the reliability of the engagement (the thinner tube wall of the side upper rod (13) is slightly deformed after being strongly squeezed by the ridge (332), but the ridge (332) is not conducive to demolding after the flat hook (3) is pressed). The side upper rod (13) is reliably clamped between the bottom side of the front partition plate (2) and the flat hook bottom plate (33) (generally not between the flat hook top plate (31) and the bottom plate (33)). The flat hook bottom plate (33) can also be used as follows Figure 2a As shown: using high-strength colloids to... Figure 2c The elastic thin pad (333) shown is pre-covered Figure 2a The bottom plate is glued and fixed on one side of the inclined head (331). During the process of snapping with the side upper rod (13), the noise is small. After the snapping is achieved, the elastic thin pad (333) also acts on the tension between the front partition plate (2) and the flat hook bottom plate (33). Figure 2a Flat hooks (3) allow for smoother demolding during production.

[0048] See Figure 3a -b: The upper extensions (111) of the two front table legs are higher than the top surface of the upper side rod (13); see Figure 3c -d、 Figure 3a -b and Figure 4a-b: When the upper extensions (111) of the left and right table legs are inserted upwards into the left and right auxiliary recesses (22) of the front panel, (when the bottom side of the front panel (2) is horizontally attached to the top surface of the side upper rod (13)) the front panel (2) is restricted by the upper extensions (111) of the table legs and cannot move forward or backward (the width of the auxiliary recesses (22) is just enough to allow the upper extensions (111) of the table legs to be inserted); however, the left and right lengths of the auxiliary recesses (22) are relatively large, so the front panel is allowed to move relative to the upper extensions (111) of the table legs in the length direction of the auxiliary recesses (22). Figure 4a In the -b state, when the assembly operator forcefully pushes the end of the front panel (2), the two flat hooks (3) with openings in the same direction will quickly engage with the upper rods (13) on the left and right sides, thus achieving a fixed connection between the front panel (2) and the table frame (see [link]). Figure 4c -d, note the reversal of the viewing angle). Given the presence of the aforementioned flat hook ridge (332) or elastic thin pad (333) adhesive layer, the flat hook (3) that is attached to the side upper rod (13) will not come off by itself in the opposite direction. Also, given that the aforementioned front panel auxiliary recess area (22) is limited by the upper extension head (111) of the front table leg, the front panel (2) connected to the table frame has no possibility of further displacement in the left and right directions or the front and back directions, which reliably meets the normal use requirements of primary and secondary school students for desks.

[0049] Comparison Figure 4a and Figure 4c Before and after the front panel (2) is fixedly connected to the table frame, or before and after the flat hook (3) is fastened to the side upper rod (13), the relative positional relationship between the upper extension (111) of the table leg and the auxiliary recess (22) of the front panel is shown in the plan. Figure 5a -d indicates the meaning.

[0050] The upper extension (111) of the table leg and the auxiliary recess (22) of the front panel cooperate with each other. Their function is not only to ensure that the front panel (2) cannot move (shake) in the front and rear directions, but also to ensure that the front panel (2) is not tilted relative to the table frame (because the distance from the left and right auxiliary recess (22) to the front side of the front panel (2) is the same), and to determine the reserved width of the front panel (2) on the front side of the table frame. These functions are all standard requirements that must be met in the assembly of mass-produced desks.

[0051] In the case where the auxiliary recess area (22) is not provided on the bottom side of the front panel (2) and the upper end of the front table leg (11) does not have an upper extension (111), see Figure 2e -h: Left and right head holes (23) are made on the front part of the bottom side of the front partition plate (2); see Figure 6a As shown, 4) includes a flat rod (41) consisting of a straight rectangular tube and columns (42) welded and positioned at both ends; see also Figure 6bWhen the operator holds the horizontal bar (41) with one hand, inserting the two end posts (42) upwards into the left and right head holes (23), and at the same time the side of the horizontal bar (41) is just against the front side table leg, the operator pushes it forcefully with the other hand. Figure 4a In the -b state, the two flat hooks (3) with openings in the same direction at the end of the front panel (2) will be directly engaged with the upper rods (13) on the left and right sides, thereby completing the fixed connection between the front panel (2) and the table frame (the rear fixed ruler (4) is removed).

[0052] See Figure 7a , Figure 8a And refer to Figure 10a The front partition plate (2) and the near partition plate (5) are evenly distributed with virtual corners (24 / 51). The end face where the virtual corner is located is opened with a side hole (241 / 511). The internal and external thread nuts are pre-embedded in the side hole. The bottom surface of the front partition plate and the near partition plate is provided with a bottom groove (25 / 52) near the virtual corner (24 / 51). The bottom surface of the bottom groove is opened with a lower hole (251 / 521). The internal and external thread nuts are pre-embedded in the lower hole (251 / 521).

[0053] See Figure 7c -d: The main body of the chain link A (6) is a base plate (61) and a bottom plate (65) that are perpendicular to each other. The base plate has a main hole (62) and a rivet hole (63) on its plane. The base plate has a horizontal fixed stake (64) integrated with it on one side. The bottom plate (65) has a bottom hole (66). Figure 7c Chain piece A (6) and Figure 7d Chain link A (6) is symmetrical on the left and right. See also Figure 7e -h: Fix chain piece A (6) at the two ends of the front sub-plate (2) at the dotted corner (24), wherein: the base plate (61) of chain piece A is located at the dotted corner (24) of the front sub-plate and the bottom plate (65) is located in the bottom groove (25) of the front sub-plate.

[0054] See Figure 8c -d: The main body of the chain link B (7) is also a base plate (71) and a bottom plate (75) that are perpendicular to each other. The base plate (71) has a main hole (72) and a rivet hole (73) on its plane. The base plate (71) has an edge opening (74) on one side and a bottom hole (76) on the bottom plate (75). Figure 8c Chain piece B (5) and Figure 8d Chain segment B(5) is symmetrical. Figure 8e In the middle: Chain piece B (7) is fixed at the two ends of the near-splitting plate (5) at the virtual corner (51), wherein: the base plate (71) of chain piece B is located at the virtual corner (51) of the near-splitting plate, and the bottom plate (75) of chain piece B is located in the bottom groove (52) of the near-splitting plate.

[0055] See Figure 9a-f: The rivets are continuously passed through the rivet holes (63) of chain link A and (73) of chain link B on the same end of the integrated panel. That is, the base plate of chain link A (61) and the base plate of chain link B (71) are partially overlapped and riveted. Chain link B (7) can rotate relative to chain link A (6) around the rivet point (axis). The rotation range is not less than [-12°, 90°] (but this range does not need to be larger) (see Figure 9a and Figure 9e State differences, Figure 9b and Figure 9f The 0° value is specified as the moment when the near plate (5) and the front plate (2) are on the same plane, and the 90° value corresponds to the moment when the edge of the chain piece B (74) is engaged with the horizontal stake (64) of the chain piece A and the near plate (5) is perpendicular to the front plate (2).

[0056] See Figure 7b , Figure 8b and Figure 7f , Figure 7h and Figure 8f : After pre-filling the false angle side hole (241 / 511) and the lower bottom hole (251 / 521) of the front partition plate (2) and near partition plate (5), screw in the internal and external thread nuts (the paste makes the internal and external thread nuts more reliably fixed in the side hole (241 / 511) and the lower hole (251 / 521). Then, use screws to pass through the main holes (62 / 72) and bottom holes (66 / 76) of chain piece A (6) and chain piece B (7) until they are tightly screwed to the front The front and near plates (2) are reliably connected by connecting piece A (6) and chain piece B (7). (The paste-like adhesive also ensures that the screw rod outside the nut is reliably bonded and fixed to the hole wall in the side holes (241 / 511) and lower hole (251 / 521), typically requiring 10-20 hours for the adhesive to resist the external force's rotational intent on the screw.) See also Figure 10a -b: The current partition (2) and the near partition (5) are located on the same plane, which is formed by... Figure 9c The chain assembly shown in -d enables connection; see also Figure 9c : Let link B (7) rotate 90° relative to link A (6), and from Figure 10a To obtain the perpendicular state of the near-side plate (5) and the front-side plate (2), see [reference]. Figure 10e -h. See also Figure 12b In classroom desk products, the front panel (2) is horizontally fixed to the upper side rod (front section) of the desk, by... Figure 10a Obtained by small-angle rotation Figure 12a The small slope of the near-side partition (5) (the so-called "small angle" is usually recommended to be a slope value of -12° suitable for students' daily healthy writing; for the meaning of "-12°" here, please refer to the following) Figure 13cIndication.

[0057] See Figure 12a This design integrates a panel from Figure 11d → Figure 10a → Figure 10g What has been achieved is a transition from a small slope near the partition board (5) suitable for students' healthy writing posture, to being lifted up, to temporarily maintaining a vertical front partition board (2) state (half of the table is fully open, allowing students to organize materials and access items more easily and conveniently with both hands on the stacked books on the table). See [link to relevant documentation]. Figure 12b The process of unidirectional rotation; then the operator manually supports the near plate (5) to rotate downwards until the near plate (5) is supported by the side upper rod (13) (see Figure 12a This brings the design back to a state of assisting students in healthy writing, representing a complete application cycle of the integrated panel.

[0058] The above Figure 10a , Figure 10g , 12b In all cases, the overall structure near the virtual corners (24 / 51) at both ends of the integrated panel of this design is symmetrical on the left and right, including the left and right symmetry of the chain link riveting groups at both ends.

[0059] See Figure 9g -h and compare Figure 9e -f: The screw (67) of the connecting chain plate A substrate (61) and the screw (68) of the connecting chain plate A base plate (65) are always perpendicular to each other, and the screw (77) of the connecting chain plate B substrate (71) and the screw (78) of the connecting chain plate B base plate (75) are always perpendicular to each other (if the fixing screws of the front plate, the near plate end face, and the bottom face are not perpendicular to each other but are set to be perpendicular to each other, the two sets of perpendicular screws still have the effect of mutually restraining each other, but the distance between the bottom hole (251 / 521) and the end side hole (241 / 511) should not be too close, so it is more reasonable to use two sets of perpendicular screws to fix the front plate and the near plate).

[0060] In this design, the integrated panel is fixedly connected by the riveting assembly of chain piece A (6) and chain piece B (7). Chain pieces A and B are hidden. See the plan view showing the relative positions of the remaining front panel (2) and near panel (5). Figure 11a -c, where it can be seen that: the front side of the near plate (5) is a semi-cylinder, and the axis of the left and right rivet points is on the same line as the central axis of the semi-cylinder; no matter where the near plate (5) is rotated, the minimum distance between the near plate (5) and the front plate (2) is constant, and its value is better if it is small (the spacing mentioned by the designer in the product sampling of this case is a small value of 1mm, and the actual verification of the sample operation meets the expectations, see Figure 10c -d).

[0061] Due to the setting of the front panel bottom groove (25) and the near panel bottom groove (52), the bottom plates (65 / 75) of chain piece A and chain piece B are embedded in the bottom groove (25 / 52) for installation and fixation. Obviously, the projection of chain piece A (6) and chain piece B (7) on the end face of the integrated panel in this design does not exceed the thickness of the table.

[0062] See Figure 12a -b, Flat hook (3) To complete the snap-fit ​​connection to the table frame, it is necessary to have a notch (122) on one side of the table belly panel for the flat hook base plate (33) to pass through. See Figure 1b -c. In Figure 12b Towards Figure 12a During the transition, the near plate (5) may hit the side upper bar (13) and generate noise. Soft sound-absorbing pads (3) are fixed at corresponding positions on the bottom of the near plate (3) above the left and right upper bars (13) to mitigate the impact.

[0063] Figure 13a It can be called "plate chain A", which is Figure 7c The case where chain link A (6) is without "bottom plate (65)"; Figure 13b It can be called "plate chain plate B", which is Figure 7d The case of link B (7) without the "base plate (75)". See also Figure 13c -d: Plate chain A and plate chain B are riveted together and then fixed to the near-side end of the front partition plate (2) and the near partition plate (5) at the dotted angle (24 / 51), respectively. The front partition plate (2) is horizontally fixed to the table frame (see Figure 1a -b), the near-side plate (5) can rotate around the left and right symmetrical riveting points (axis), and the rotation range is the same as the aforementioned situation. Since the "base plate" is removed, the reliability of fixing the "plate chain A" and "plate chain B" at the end of the integrated panel is generally worse. However, if the side holes (241 / 511) of the front side plate and near-side plate are deep enough (such as reaching 20-25mm), and the glue is injected to embed the nuts (10mm in length is sufficient), and M5 or M6 screws are selected, the "plate chain A" and "plate chain B" can still roughly meet the actual application requirements.

[0064] It is also worth noting that:

[0065] ①The traditional fixed connection between the wooden or plastic tabletop and the table frame generally requires tightening 4-6 screws. According to observation and calculation, it takes an average of 60-90 seconds to fix one desk. Based on the auxiliary recess area (22) with the extension head (111) and the limit and flat hook (3) to lock the side upper rod (13), the fixed connection between the new integrated panel and the table frame takes no more than 15 seconds. The time to remove the integrated panel from the table frame is even shorter (no more than 10 seconds). The assembly of the integrated panel in this design directly meets the standard requirements for the position of the tabletop.

[0066] ② The integrated panel assembly accessories referred to in this design include flat hooks (3), chain links A, chain links B, screws, nuts, etc. Figure 11d The table frame corresponding to the integrated panel is not a widely used structure, such as the underside of a school desk (see...). Figure 1b -c), a broken-line side upper bar (see...) Figure 1a ), and even includes the upper extension head (111) above the side upper bar (13) (see Figure 3a ) etc. According to this understanding, Figure 12a -b The initial sale of the desks shown in the image to the specific customer school should include Figure 1a The table frame shown (it is recommended that the table frame and integrated panel be produced and transported separately, and that thin integrated panels be stacked for transport to reduce logistics costs and ensure that the integrated panels are not squeezed or damaged during transport). Only by updating the integrated panel and applying the table frame of this design can the most perfect implementation be achieved (the imperfect implementation means that the upper end of the front table leg does not have an upper extension head (111). The position is corrected by using a ruler (4) and the front panel head hole (23). The flat hook (3) is still used to snap the side upper rod. Even if the side upper rod (13) is horizontal throughout, the integrated panel and the table frame can be snapped together).

[0067] ③ Regarding the reusable desk frames remaining in the client's school classrooms. For desk frames with localized surface scratches or marks, quickly cover them with spray paint of the same color (widely available on the market). Additionally, it is recommended to perform general disinfection spraying (e.g., 75% medical alcohol) on all desk frames in the classroom before installing new integrated panels.

[0068] ④ See Figure 9a -f and Figure 12a -b: The inner and outer links of chain link A (including the reverse of the lateral stud) and chain link B on the same end of the integrated panel are interchanged, the positions of the lateral stud and the edge are interchanged between chain link A and chain link B, or the positions of chain link A and chain link B are interchanged between the front plate and the near plate. The actual effect of the fit is not changed before and after the interchange.

[0069] ⑤ As the previous partition plate (2) and the near partition plate (5) are obtained by injection molding, the connection method of this design is still effective. Moreover, due to the significant reduction in weight of the near partition plate (5), the connection between the chain piece B and the near partition plate is more reliable. Excellent desktop color is easy to obtain, but the initial mold cost is relatively high.

[0070] ⑥ In terms of the meaning of "novel integrated panel", it may also include a "reading rack" mounted on it (see the applicant's Chinese patent application 202512046990.3, "A Reading Rack for a Classroom Desk"). This novel integrated panel design aims to integrate student classroom learning services and improve the service standards of primary and secondary school desk products.

Claims

1. A novel integrated panel for classroom desks, comprising a near panel and a front panel horizontally fixed to a side upper rod, wherein the corresponding desk frame is composed of desk legs, side upper rods, a desk body, a front crossbar, a near crossbar, and a side center rod, the desk body being located at the upper part of the desk frame, and the left and right side upper rods being parallel and of equal height, characterized in that... It also includes: The main recessed areas are arranged on the left and right sides of the bottom of the front panel. The flat hook top plate is fixed to the main recessed area. The left and right flat hooks with openings in the same direction are respectively connected to the upper rods on the left and right sides of the table frame. Steel chain links A and B are fixed to the left and right ends of the front and near plates, respectively. Chain links A and B at both ends are symmetrical, and chain links A and B at the same end are movably riveted. Chain link A carries a transverse anchor. When the near-segment plate is perpendicular to the front segment plate, the edge of chain link B is precisely engaged with the transverse anchor of chain link A.

2. The novel integrated panel for classroom desks according to claim 1, characterized in that: The bottom side of the front panel has pre-set left and right auxiliary recesses. When the upper extension of the front table leg, which extends beyond the top surface of the side upper rod, is inserted into the left and right auxiliary recesses, the left and right flat hooks are engaged with the side upper rod.

3. The novel integrated panel for classroom desks according to claim 1, characterized in that: The bottom side of the front panel has pre-set left and right head holes. When the uprights at both ends of the fixed ruler are inserted into the upward joint holes and the side of the fixed ruler is against the front table support leg, the left and right flat hooks are connected to the upper side rod.

4. The novel integrated panel for classroom desks according to claim 1, characterized in that: Both chain link A and chain link B contain mutually perpendicular base plates and bottom plates. The screws that fix chain link A on the front end face and bottom face of the split plate are mutually perpendicular, and the screws that fix chain link B on the near end face and bottom face of the split plate are mutually perpendicular.

5. The novel integrated panel for a classroom desk according to claim 1, characterized in that: The front side of the near-side plate is semi-cylindrical, and the minimum distance between the near sides of the front and near-side plates is ≤1mm.

6. The novel integrated panel for a classroom desk according to claim 1, characterized in that: The flat hook base plate is designed to facilitate the engagement of the downward-sloping head of the upper side rod and the use of elastic thin pads to reduce noise.

7. The novel integrated panel for a classroom desk according to claim 1, characterized in that: The flat hook base plate is conducive to the flat hook clamping the convex ridge of the side upper rod.

8. The novel integrated panel for a classroom desk according to claim 1, characterized in that: The bottom surface of the near-split plate above the upper section of the left and right sides of the pole is fixed with a sound-absorbing pad.

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