Teaching drawing display device for building cost

Abstract

The utility model discloses a kind of teaching drawing display devices for construction cost, comprising: box, the rear side of the box is rotatably connected with box cover, and the front side of box is fixedly connected with the front side of box cover by lock catch;Further comprising: the inside of the box cover is provided with the limiting mechanism for preventing the wobble of extension plate, and the inside of the box is provided with drawing placing groove;The inside of the box cover is provided with the fixing mechanism for adjusting the display angle of extension plate, and the inside of the box cover is provided with magnetic attraction fixing piece, and magnetic attraction fixing piece is array distribution.The teaching drawing display device for construction cost, by the thread connection of lead screw and fastening ring, limit block and extension plate are closely attached, the stable limiting of extension plate is realized, avoid wobble when not showing, adjusting disc rotates with rotating rod in fixing mechanism, limit rod is clamped into different adjusting hole under the action of reset spring, the flexible adjustment of extension plate display angle is realized.

Description

Technical Field

[0001] This utility model relates to the field of construction cost technology, specifically a teaching drawing display device for construction cost. Background Technology

[0002] Construction cost refers to all expenses incurred in constructing a project, that is, the total amount of funds required from planning to completion, acceptance and handover. It covers fixed asset and intangible asset investments, and its core is to reasonably control project costs to achieve expected returns. Teaching construction cost requires frequent display of construction drawings, bills of quantities, cost analysis charts and other materials. Traditional display methods (such as holding drawings or pasting them on the blackboard) have problems such as poor stability, easy damage and poor display effect.

[0003] Referring to Chinese Patent Publication No. CN221204861U, with the publication date of June 25, 2024, a construction cost drawing analysis and display device is disclosed. This utility model, by setting an extension part and a limiting mechanism, allows the extension part to be pulled out of the main support part under the action of the limiting mechanism. When in use, the angle can be adjusted according to the usage situation, making it convenient for users to view. Furthermore, the drawings can be stored under the action of the storage mechanism, increasing the convenience of the device.

[0004] However, existing building cost drawing analysis and display devices require many parts during use, and it is inconvenient to fix the extension part for display, which brings certain inconvenience to actual use. Therefore, there is still room for further improvement.

[0005] Therefore, we propose a teaching drawing display device for building cost estimation in order to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this utility model is to provide a teaching drawing display device for construction cost, in order to solve the problem that the existing construction cost drawing analysis and display devices mentioned in the background art require many parts during use and are inconvenient to fix the extension part for display, which brings certain inconvenience to actual use. Therefore, there is still room for further improvement.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a teaching drawing display device for building cost estimation, comprising:

[0008] The box body is rotatably connected to the box lid, and the front side of the box body is fixedly connected to the front side of the box lid by a latch;

[0009] Also includes:

[0010] The inside of the box cover is provided with a limiting mechanism to prevent the extension plate from shaking, and the inside of the box body is provided with a drawing placement slot.

[0011] The inside of the box cover is equipped with a fixing mechanism for adjusting the display angle of the extension plate, and the inside of the box cover is equipped with magnetic fasteners, which are distributed in an array.

[0012] Preferably, a connecting ring is provided on the inner left side of the box cover, and the connecting ring is symmetrical about the vertical central axis of the box cover. The connecting ring is rotatably connected to the rotating rod, and the rotating rod corresponds to the connecting ring one by one.

[0013] Preferably, the limiting mechanism is composed of an extension plate, a limiting block, a lead screw, and a fastening ring. The rotating rod is fixedly connected to the extension plate, the extension plate is tightly fitted to the limiting block, and the limiting block is slidably connected to the lead screw.

[0014] Preferably, the lead screw is fixedly connected to the box cover, and the lead screw is threadedly connected to the fastening ring.

[0015] Preferably, the fixing mechanism is composed of an adjusting plate, adjusting holes, a limiting rod, and a return spring. The adjusting plate is fixedly connected to the rotating rod, and the adjusting plate has adjusting holes inside, which are arranged in an array.

[0016] Preferably, the adjusting hole is slidably connected to the limiting rod, and the limiting rod is slidably connected to the box cover, and the adjusting plate corresponds one-to-one with the rotating rod, and a return spring is provided on the outer side of the limiting rod.

[0017] Preferably, the limiting rod is provided with a first limiting ring and a second limiting ring on its outer side, and the return spring is located between the first limiting ring and the box cover, and the second limiting ring is located on the outer side of the box cover, and the limiting rod is fixedly connected to the pull ring.

[0018] Compared with the prior art, the beneficial effects of this utility model are: the teaching drawing display device for building cost uses a screw and a fastening ring to push the limiting block and the extension plate to fit tightly, thereby achieving stable limiting of the extension plate and preventing shaking when not displaying. In the fixing mechanism, the adjusting plate rotates with the rotating rod, and the limiting rod is engaged in different adjusting holes under the action of the return spring, thereby achieving flexible adjustment of the display angle of the extension plate.

[0019] 1. It is equipped with a box body, a lid, and a latch. The box body and the lid are rotatably connected. When opened, it can be unfolded for display. When closed, it is fixed by the latch, which makes it easy to store drawings and carrying devices.

[0020] 2. It is equipped with magnetic fasteners and a drawing slot. The array of magnetic fasteners is distributed inside the lid, which can quickly attach and fix the drawings. The drawing slot is used to store drawings that are not displayed, improving the ease of use.

[0021] 3. It is equipped with a connecting ring, a rotating rod, and a pull ring. The connecting ring provides rotational support for the rotating rod, and the pull ring makes it easy to pull the limit rod away from the adjustment hole, facilitating angle adjustment.

[0022] 4. It is equipped with an extension plate, a limiting block, and a lead screw. The lead screw is connected to the fastening ring by a thread, which pushes the limiting block to fit tightly with the extension plate, so as to achieve stable limiting of the extension plate and prevent shaking when not in display.

[0023] 5. It is equipped with an adjustment disc, a limit rod, and a return spring. In the fixing mechanism, the adjustment disc rotates with the rotating rod, and the limit rod is engaged in different adjustment holes under the action of the return spring, so as to realize the flexible adjustment of the display angle of the extension plate. Attached Figure Description

[0024] Figure 1 This is a schematic diagram showing the state structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the present invention in its closed state.

[0026] Figure 3 This is a schematic diagram of the present invention and its exploded structure;

[0027] Figure 4 This is a schematic diagram of the present invention in its open state;

[0028] Figure 5 This utility model Figure 4 Enlarged structural diagram at point A in the middle.

[0029] In the diagram: 1. Box body; 2. Box cover; 3. Lock; 4. Drawing slot; 5. Magnetic fastener; 6. Connecting ring; 7. Rotating rod; 8. Extension plate; 9. Limiting block; 10. Lead screw; 11. Fastening ring; 12. Adjusting disc; 13. Adjusting hole; 14. Limiting rod; 15. First limiting ring; 16. Second limiting ring; 17. Return spring; 18. Pull ring. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figures 1-5As shown, this utility model provides a technical solution: a teaching drawing display device for construction cost, comprising: a box body 1, a box cover 2, a lock 3, a drawing placement slot 4, a magnetic fixing component 5, a connecting ring 6, a rotating rod 7, an extension plate 8, a limiting block 9, a lead screw 10, a fastening ring 11, an adjusting plate 12, an adjusting hole 13, a limiting rod 14, a first limiting ring 15, a second limiting ring 16, a return spring 17, and a pull ring 18.

[0032] Existing construction cost drawing analysis and display devices require many parts during use, and it is inconvenient to fix the extension parts for display, which brings certain inconvenience to actual use. Therefore, there is still room for further improvement.

[0033] like Figure 1 , Figure 2 and Figure 4 As shown, before teaching, the device needs to be switched from the storage state to the display state. Unlock the latches 3 on the front edges of the box 1 and the lid 2. After the latches 3 disengage from their slots, use the hinges connecting the rear sides of the box 1 and lid 2 as the pivot point to flip the lid 2 upwards until the box 1 and lid 2 are in an unfolded state. After flipping, the lid 2 can be held by hand for easy display of drawings. At this time, the drawing slot 4 inside the box 1 is fully exposed, from which construction drawings, cost estimates, and other documents to be displayed can be taken out. The magnetic fasteners 5, such as permanent magnets, arranged in an array on the inner wall of the lid 2 are in a ready-to-use state, used to initially fix the edges of the drawings.

[0034] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, if the drawings to be displayed are large or numerous, the extension plate 8 needs to be used to expand the display area. First, rotate the limiting block 9 to disconnect the limiting block 9 from the extension plate 8, and then the extension plate 8 can be rotated. Rotate the fastening ring 11. Since the fastening ring 11 is connected to the lead screw 10 by a thread and the lead screw 10 is fixed inside the box cover 2, the fastening ring 11 will move along the lead screw 10. At this time, the limiting block 9 sleeved on the lead screw 10 can move. When the inner wall of the limiting block 9 is no longer tightly attached to the outer wall of the extension plate 8, the extension plate 8 can be rotated.

[0035] Connecting rings 6 are symmetrically fixed at both ends of the inner side of the lid 2. The two ends of the rotating rod 7 are respectively embedded in the corresponding connecting rings 6, forming rotation fulcrums. Holding the outer edge of the extension plate 8, pull it outwards and rotate it. The rotating rod 7 rotates synchronously with the extension plate 8 within the connecting rings 6, causing the extension plate 8 to rotate out of the storage slot inside the lid 2. Furthermore, the two extension plates 8 can be operated independently, and can be unfolded on one or both sides according to the dimensions in the drawing. It should be noted that before rotating the extension plate 8, the limiting rod 14 must be disconnected from the adjusting hole 13.

[0036] like Figure 3 , Figure 4 and Figure 5 As shown, if the display angle of the extension plate 8 needs to be adjusted, an adjustment plate 12 is fixedly sleeved in the middle of the rotating rod 7. The adjustment plate 12 has evenly distributed arrayed adjustment holes 13 on its circumferential surface. Initially, the inner end of the limiting rod 14 is engaged in one of the adjustment holes 13 under the elastic force of the return spring 17, restricting the rotation of the adjustment plate 12. During adjustment, pull the pull ring 18 outwards. The pull ring 18 drives the limiting rod 14 to move outwards towards the outside of the box cover 2. The first limiting ring 15 in the middle of the limiting rod 14 compresses the return spring 17. The other end of the return spring 17 abuts against the inner wall of the box cover 2 until the inner end of the limiting rod 14 is completely disengaged from the adjustment hole 13. Maintaining the tension, rotate the extension plate 8, causing the rotating rod 7 and the adjustment plate 12 to rotate synchronously. By observing the angular relationship between the extension plate 8 and the box cover 2, adjust it to the target angle.

[0037] Then, the pull ring 18 is slowly released, the return spring 17 releases its elastic force, and pushes the first limiting ring 15 and the limiting rod 14 to move inward, so that the inner end of the limiting rod 14 is precisely engaged in the corresponding angle adjustment hole 13, and the adjustment plate 12 is fixed by mechanical engagement, thereby locking the angle of the extension plate 8. The second limiting ring 16 on the outside of the limiting rod 14 can prevent the limiting rod 14 from completely disengaging from the cover 2, and plays a limiting protection role.

[0038] like Figure 1 As shown, the drawing is laid flat on the inside of the box cover 2 and the surface of the extension plate 8. The edges of the drawing are fixed by magnetic fasteners 5. A thin metal plate can be set on the surface of the extension plate 8 to cooperate with the magnetic fasteners 5 to ensure that the drawing is flat and wrinkle-free, and to prevent it from shifting due to wind or slight collisions during the display process.

[0039] After the demonstration, store the device according to the following steps: remove the fixed drawing, fold it and put it into the drawing placement slot 4 of the box 1. Pull the pull ring 18 outward to make the limiting rod 14 disengage from the adjustment hole 13. Turn the extension plate 8 back into the storage slot inside the box cover 2. After the extension plate 8 is fully stored, release the pull ring 18 and the limiting rod 14 will automatically snap into the initial adjustment hole 13.

[0040] Then, rotate the fastening ring 11. Since the fastening ring 11 is connected to the lead screw 10 by threads, and the lead screw 10 is fixed inside the lid 2, the fastening ring 11 will move inward along the lead screw 10, pushing the limiting block 9 sleeved on the lead screw 10 to move synchronously until the inner wall of the limiting block 9 is tightly fitted with the outer wall of the extension plate 8. The static friction between the two limits the rotation or shaking of the extension plate 8, achieving stable fixation. Finally, using the rear hinge of the box body 1 and the lid 2 as the axis, flip the lid 2 downward to close it with the box body 1, and fasten the lock 3 to complete the overall storage.

[0041] The contents not described in detail in this specification are existing technologies known to those skilled in the art. All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0042] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A teaching drawing display device for construction cost estimation, comprising: Box body (1), the rear side of the box body (1) is rotatably connected to the box cover (2), and the front side of the box body (1) is fixedly connected to the front side of the box cover (2) by a latch (3); Its characteristic is that it further includes: The inside of the box cover (2) is provided with a limiting mechanism to prevent the extension plate (8) from shaking, and the inside of the box body (1) is provided with a drawing placement slot (4); The inside of the box cover (2) is provided with a fixing mechanism for adjusting the display angle of the extension plate (8), and the inside of the box cover (2) is provided with magnetic fasteners (5), and the magnetic fasteners (5) are distributed in an array.

2. The teaching drawing display device for building cost estimation according to claim 1, characterized in that: A connecting ring (6) is provided on the inner left side of the box cover (2), and the connecting ring (6) is symmetrical about the vertical central axis of the box cover (2). The connecting ring (6) is rotatably connected to the rotating rod (7), and the rotating rod (7) corresponds to the connecting ring (6) one by one.

3. The teaching drawing display device for building cost estimation according to claim 2, characterized in that: The limiting mechanism is composed of an extension plate (8), a limiting block (9), a lead screw (10) and a fastening ring (11). The rotating rod (7) is fixedly connected to the extension plate (8), and the extension plate (8) is tightly fitted with the limiting block (9). The limiting block (9) is slidably connected to the lead screw (10).

4. The teaching drawing display device for building cost estimation according to claim 3, characterized in that: The lead screw (10) is fixedly connected to the box cover (2), and the lead screw (10) is threadedly connected to the fastening ring (11).

5. The teaching drawing display device for building cost estimation according to claim 1, characterized in that: The fixing mechanism is composed of an adjusting plate (12), an adjusting hole (13), a limiting rod (14), and a reset spring (17). The adjusting plate (12) is fixedly connected to the rotating rod (7), and the adjusting plate (12) has an adjusting hole (13) inside, and the adjusting hole (13) is distributed in an array.

6. The teaching drawing display device for building cost estimation according to claim 5, characterized in that: The adjustment hole (13) is slidably connected to the limiting rod (14), and the limiting rod (14) is slidably connected to the box cover (2). The adjustment plate (12) corresponds one-to-one with the rotating rod (7), and a return spring (17) is provided on the outside of the limiting rod (14).

7. The teaching drawing display device for building cost estimation according to claim 6, characterized in that: The limiting rod (14) is provided with a first limiting ring (15) and a second limiting ring (16) on its outer side, and the reset spring (17) is located between the first limiting ring (15) and the box cover (2), and the second limiting ring (16) is located on the outer side of the box cover (2), and the limiting rod (14) is fixedly connected to the pull ring (18).

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