Portable cost calculation board

Abstract

The utility model discloses a portable cost calculation board, and belongs to the technical field of engineering cost. Comprising a storage cylinder; a coil spring is mounted in the coil spring barrel, and the coil spring barrel is fixedly mounted at one end of the storage barrel; the rotating shaft is rotationally connected into the storage barrel, penetrates through the storage barrel, extends into the coil spring barrel and is fixedly connected with the coil spring; the plastic plate is wound outside the rotating shaft; the pressure cylinder is fixedly connected to the other end of the plastic plate and is hermetically communicated with the plastic plate; the piston part is mounted in the pressure cylinder in a sliding fit manner; and the plastic base plates are fixedly installed in the grooves in the two sides of the plastic plate in a symmetrical structure, and the plastic base plates are used for supporting writing of the cost calculation paper and supporting writing of the cost calculation paper. Under the cooperative action of the storage cylinder, the plastic plate and the pressure cylinder provided with the piston piece, the unfolded plastic plate is inflated and tightened, and the stability that the plastic plate supports the plastic base plate for writing is improved.

Description

Technical Field

[0001] The present application relates to the technical field of engineering cost, and more specifically, to a portable cost calculation board. Background Art

[0002] The calculation board for construction project cost is an auxiliary tool for reasoning and calculating construction project cost, which is convenient for writing. Its main function is to place calculation paper on it for the convenience of calculation personnel.

[0003] The document with prior art publication number CN215455985U provides a portable construction cost calculation board. The related technology of this device uses a retractable device to facilitate workers to carry calculation tools and instruments. At the same time, different areas in the retractable box can also facilitate the management of various tools. This device not only improves portability, but also prevents the loss of calculation objects, thereby improving practicality.

[0004] However, the device is a suitcase-like structure, and although it can carry a variety of cost calculation tools, it is large in size and poor in portability.

[0005] In view of this, we propose a portable cost calculation board. Utility Model Content

[0006] In order to improve the problems raised in the above background technology, this application provides a portable cost calculation board.

[0007] The portable cost calculation board provided by this application adopts the following technical solutions:

[0008] A portable cost calculation board, comprising:

[0009] Storage tube;

[0010] A coil spring cylinder is installed inside with a coil spring, and the coil spring cylinder is fixedly installed at one end of the storage cylinder;

[0011] The rotating shaft is rotatably connected in the storage tube, passes through the storage tube, extends into the coil spring tube, and is fixedly connected to the coil spring;

[0012] A plastic sheet is wound around the outside of the rotating shaft;

[0013] The pressure cylinder is fixedly connected to the other end of the plastic plate and is in sealed communication with the plastic plate;

[0014] A piston member is slidably mounted in the pressure cylinder;

[0015] The plastic pad is symmetrically structured and fixedly installed in the grooves on both sides of the plastic plate. The plastic pad is used to support the writing of the cost calculation paper.

[0016] By adopting the above technical solution, the unfolded plastic plate is inflated and tightened by the cooperation of the storage tube, the plastic plate and the pressure cylinder equipped with a piston part, thereby improving the stability of the plastic plate supporting the plastic pad for writing. Under the action of the coil spring driving the rotation of the rotating shaft, the winding and storage function of the plastic plate is realized, thereby reducing the size of the device and improving the portability of the device.

[0017] As an optional solution to the technical solution of this application document, the interior of the plastic plate is hollow and is sealed and connected to the pressure cylinder through a pressure hose, and an elastic mesh plate with a mesh structure is fixedly installed inside the plastic plate.

[0018] By adopting the above technical solution, the elastic mesh plate can be used to reinforce the strength of the unfolded plastic plate, so that the plastic plate is more stable and less likely to sag when supporting the plastic pad for writing, thereby improving the writing effect.

[0019] As an optional solution to the technical solution of this application document, a sealing rubber ring is fixedly connected to the pressure cylinder, the sealing rubber ring is sleeved and limited with the piston member, and the pressure cylinder is a transparent cylinder made of acrylic sheet.

[0020] By adopting the above technical solution, the moving and stretched piston part is sealed with a sealing rubber ring, thereby improving the sealing performance of the pressure cylinder. The transparent cylinder structure of the pressure cylinder facilitates intuitive understanding of the wear condition of the piston part.

[0021] As an optional solution to the technical solution of this application document, the piston member includes a piston plate adapted for sliding connection in the pressure cylinder, the piston plate and the sealing rubber ring are plugged and limited, and a pull cylinder is hingedly installed at one end of the piston plate, and the pull cylinder is limited by hanging on a hanging ring installed at one end of the storage cylinder.

[0022] By adopting the above technical solution, the pull tube is used to limit the stretching, driving the piston plate adapted to the pressure tube to squeeze the internal gas into the plastic plate with a hollow structure in a compressed state to inflate the released plastic plate, and inflate and tighten the released plastic plate to provide a support surface for writing on the plastic pad. After the pull tube is stretched to the extreme point and bent to limit the position, it is hung and fixed to the hanging ring installed at one end of the storage tube, thereby keeping the opened plastic plate, the storage tube and the pressure tube to form a writing board, which is convenient for budget rehearsals.

[0023] As an optional solution to the technical solution of this application document, the pull tube consists of a hollow tube rod and a spring buckle column threadedly connected at one end thereof, and the hollow tube rod contains wound calculation paper and calculation pen.

[0024] By adopting the above technical solution, the wound calculation paper and calculation pen are stored inside the hollow tube, making the device small, easy to carry, and fully usable.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. This application utilizes the cooperation of a storage tube, a plastic plate, and a pressure cylinder equipped with a piston to inflate and tighten the unfolded plastic plate, thereby improving the stability of the plastic plate supporting the plastic pad for writing. The coil spring drives the rotating shaft to rotate, thereby realizing the winding and storage function of the plastic plate, reducing the size of the device and thus improving the portability of the device.

[0027] 2. The present application can reinforce the strength of the unfolded plastic plate by utilizing an elastic mesh plate, so that the plastic plate is more stable and less likely to sag when supporting a plastic pad for writing, thereby improving the writing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall structure of a portable cost calculation board disclosed in a preferred embodiment of the present application;

[0029] Figure 2 This is a schematic diagram of the overall structure of a portable cost calculation board disclosed in a preferred embodiment of the present application in a closed state;

[0030] Figure 3 A schematic diagram of the internal structure of the plastic plate of a portable cost calculation board disclosed in a preferred embodiment of the present application;

[0031] Figure 4 This is a schematic diagram of the internal structure of the pressure cylinder of the portable cost calculation board disclosed in a preferred embodiment of the present application;

[0032] Figure 5 This is a schematic diagram of the piston structure of a portable cost calculation board disclosed in a preferred embodiment of the present application;

[0033] Explanation of the numbers in the figure: 1. Storage cylinder; 2. Coil spring cylinder; 3. Rotating shaft; 4. Plastic plate; 5. Pressure cylinder; 6. Piston; 7. Plastic pad; 41. Elastic mesh plate; 51. Sealing rubber ring; 61. Piston plate; 62. Pull cylinder; 63. Cylinder rod; 64. Spring buckle column. DETAILED DESCRIPTION

[0034] The present application is further described in detail below with reference to the accompanying drawings.

[0035] Reference Figure 1 and Figure 2 A portable cost calculation board in the embodiment of the present application includes:

[0036] Storage tube 1;

[0037] A spring barrel 2 with a coil spring installed inside is fixedly mounted on one end of the storage barrel 1;

[0038] The rotating shaft 3 is rotatably connected to the storage tube 1, and extends through the storage tube 1 to the coil spring tube 2 and is fixedly connected to the coil spring;

[0039] The plastic sheet 4 is wound around the outside of the rotating shaft 3;

[0040] The pressure cylinder 5 is fixedly connected to the other end of the plastic plate 4 and is in sealed communication with the plastic plate 4;

[0041] The piston member 6 is slidably mounted in the pressure cylinder 5;

[0042] The plastic pads 7 are symmetrically mounted in the grooves on both sides of the plastic plate 4. The plastic pads 7 are used to support the writing of the cost calculation paper.

[0043] The portable cost calculation board uses the storage tube 1, the plastic plate 4 and the pressure tube 5 equipped with a piston 6 to inflate and tighten the unfolded plastic plate 4, thereby improving the stability of the plastic plate 4 supporting the plastic pad 7 for writing. The winding spring drives the rotating shaft 3 to rotate, thereby realizing the winding and storage function of the plastic plate 4, reducing the size of the device and thus improving the portability of the device.

[0044] Reference Figure 3 and Figure 1 In the portable cost calculation board recorded in the embodiment of the present application, the interior of the plastic plate 4 is a hollow structure, and is sealed and connected to the pressure cylinder 5 through a pressure hose, and an elastic mesh plate 41 with a mesh structure is fixedly installed inside the plastic plate 4.

[0045] The portable cost calculation board can reinforce the strength of the unfolded plastic board 4 by using the elastic mesh plate 41, so that the plastic board 4 is more stable and less likely to sag when supporting the plastic pad 7 for writing, thereby improving the writing effect.

[0046] Reference Figure 4 and Figure 1 In the portable cost calculation board recorded in the embodiment of the present application, a sealing rubber ring 51 is fixedly connected to the pressure cylinder 5, the sealing rubber ring 51 is sleeved and limited with the piston member 6, and the pressure cylinder 5 is a transparent cylinder made of acrylic sheet.

[0047] The portable cost calculation board improves the sealing performance of the pressure cylinder 5 by using a sealing rubber ring 51 to seal the moving and stretched piston member 6, and the transparent cylinder structure of the pressure cylinder 5 makes it easy to intuitively understand the use and wear status of the piston member 6.

[0048] Reference Figure 5 and Figure 1The piston member 6 in the portable cost calculation board recorded in the embodiment of the present application includes a piston plate 61 adapted to be slidably connected in the pressure cylinder 5. The piston plate 61 is plugged into and limited by the sealing rubber ring 51, and a pull cylinder 62 is hingedly installed at one end of the piston plate 61. The pull cylinder 62 is limited by hanging on a hanging ring installed at one end of the storage cylinder 1. The pull cylinder 62 consists of a hollow structure cylinder rod 63 and a spring buckle column 64 threadedly connected at one end thereof. The hollow structure cylinder rod 63 contains wound calculation paper and calculation pen.

[0049] The portable cost calculation board utilizes the pull cylinder 62 to limit the stretching, driving the piston plate 61 adapted to the pressure cylinder 5 to squeeze the internal gas into the hollow structure plastic plate 4 in a compressed state to inflate the released plastic plate 4, and to inflate and tighten the released plastic plate 4 to provide a support surface for the plastic pad 7 to be used for writing. After the pull cylinder 62 is stretched to the extreme and bent to limit the position, it is hung and fixed with the hanging ring installed at one end of the storage cylinder 1, thereby keeping the opened plastic plate 4, the storage cylinder 1 and the pressure cylinder 5 to form a writing board, which is convenient for budget practice. The hollow cylinder rod 63 is used to store the wound calculation paper and calculation pen, making the device compact, easy to carry, and complete in use.

[0050] Working principle: When the operator needs to unfold the wound calculation device, he first unscrews the spring buckle column 64, takes out the wound calculation paper and calculation pen stored in the barrel 63, and then re-threads the spring buckle column 64 and the barrel 63;

[0051] Next, pull the pressure cylinder 5 to release and unfold the plastic plate 4 wound on the outside of the rotating shaft 3 in the storage cylinder 1. After unfolding, pull the pull cylinder 62 composed of the cylinder rod 63 and the spring buckle column 64. The pulled-down pull cylinder 62 drives the piston plate 61 to be limited in the pressure cylinder 5 to squeeze the internal gas, and inflate the plastic plate 4 with a hollow structure in a compressed state, and inflate and tighten the stretched and released plastic plate 4. After the pull cylinder 62 is stretched to the extreme and bent to a limit, it is hung and fixed with the hanging ring installed at one end of the storage cylinder 1, so that the opened plastic plate 4, the storage cylinder 1 and the pressure cylinder 5 form a writing board. Then, the removed calculation paper can be placed on the surface of the plastic pad 7 for calculation.

Claims

1. A portable cost calculation board, characterized in that: include: Storage tube; A coil spring cylinder with a coil spring installed inside, wherein the coil spring cylinder is fixedly installed at one end of the storage cylinder; A rotating shaft is rotatably connected in the storage tube, and penetrates the storage tube and extends into the coil spring tube to be connected and fixed to the coil spring; A plastic sheet is wound around the outside of the rotating shaft; The pressure cylinder is fixedly connected to the other end of the plastic plate and is sealed and connected to the plastic plate; A piston member is slidably mounted in the pressure cylinder; The plastic pad has a symmetrical structure and is fixedly installed in the grooves on both sides of the plastic plate. The plastic pad is used to support the writing of the cost calculation paper.

2. The portable cost calculation board according to claim 1 is characterized in that: The interior of the plastic plate is a hollow structure and is sealed and connected to the pressure cylinder through a pressure hose.

3. The portable cost calculation board according to claim 1 is characterized in that: A sealing rubber ring is fixedly connected inside the pressure cylinder, the sealing rubber ring is sleeved with the piston member to limit the position, and the pressure cylinder is a transparent cylinder made of acrylic sheet material.

4. The portable cost calculation board according to claim 1 is characterized in that: The piston member includes a piston plate adapted to be slidably connected in the pressure cylinder, the piston plate is inserted and limited with a sealing rubber ring, and a pull cylinder is hingedly installed at one end of the piston plate, and the pull cylinder is limited by hanging with a hanging ring installed at one end of the storage cylinder.

5. The portable cost calculation board according to claim 4 is characterized in that: The pull tube is composed of a hollow tube rod and a spring buckle column threadedly connected at one end thereof, and the hollow tube rod contains wound calculation paper and calculation pen.

6. The portable cost calculation board according to claim 2 is characterized in that: An elastic mesh plate with a mesh structure is fixedly installed inside the plastic plate.

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