Multifunctional engineering calculator

Abstract

This application discloses a multifunctional engineering calculator, relating to the field of engineering calculation technology. The multifunctional engineering calculator includes a writing tablet and a protective cover. The protective cover has a first mounting groove, within which the calculator is detachably mounted. The writing tablet has a protective shell, and one side of the protective cover is hinged to the writing tablet so that when the protective shell is closed onto the first mounting groove, the writing tablet is at least partially housed within it. The end of the writing tablet used for handwriting input faces the inner wall of the first mounting groove. Thus, by providing the writing tablet and the protective cover with the first mounting groove, the calculator is detachably mounted on the first mounting groove. When not in use, the end of the writing tablet used for handwriting input can be stored in the first mounting groove of the protective cover, with the protective shell facing outwards. This protects the writing tablet from environmental damage and reduces space occupation during carrying, improving portability.

Description

Technical Field

[0001] This application relates to the field of engineering calculation technology, and in particular to a multifunctional engineering calculator. Background Technology

[0002] The multi-functional engineering calculators on the market simply feature a detachable design between the calculator and the handwriting tablet, merely fulfilling the user's calculation and handwriting functions. They fail to provide comprehensive protection for the detachable design. Furthermore, the most vulnerable parts, the handwriting LCD film and the handwriting tablet, are exposed, making them highly susceptible to physical damage such as impacts and scratches, leading to a shortened lifespan or damage to the handwriting function. Therefore, there is an urgent need for a multi-functional engineering calculator that offers comprehensive protection and is easy to carry. Utility Model Content

[0003] The main purpose of this application is to propose a multi-functional engineering calculator that aims to solve the problem that simply making the calculator and handwriting tablet detachable in a multi-functional engineering calculator does not provide comprehensive protection for the detachable engineering calculator.

[0004] To achieve the above objectives, this application proposes a multi-functional engineering calculator, which includes:

[0005] A handwriting tablet and a protective cover are provided. The protective cover has a first mounting groove in which a calculator is detachably installed. The handwriting tablet has a protective shell. One side of the protective cover is hinged to the handwriting tablet so that when the protective shell is closed on the first mounting groove, the handwriting tablet is at least partially housed in the first mounting groove. The end of the handwriting tablet used for handwriting input faces the bottom wall of the first mounting groove.

[0006] In one embodiment, the multifunctional engineering calculator further includes a protective shell, the handwriting tablet is disposed inside the protective shell, and the edge of the protective shell protrudes toward the end of the handwriting tablet used for handwriting input.

[0007] In one embodiment, the handwriting tablet is provided with a handwriting liquid crystal film, and a buffer groove is provided along the bottom wall edge of the second mounting groove. The width of the handwriting liquid crystal film is smaller than the width of the protective shell.

[0008] In one embodiment, the protective sleeve is further provided with a fixing member for securing the handwriting tablet when it is stored in the first mounting slot.

[0009] In one embodiment, the sidewall of the first mounting groove extends inward and is provided with an isolation block for abutting against the surface of the handwriting input end of the handwriting tablet.

[0010] In one embodiment, the multifunctional engineering calculator further includes a hinge for flipping the handwriting tablet onto a surface of the protective sleeve that is opposite to the first mounting groove. The hinge has a first through hole and a second through hole at its upper and lower ends, respectively. The first through hole is used to place a first shaft connector, which is used to connect one end of the protective sleeve. The second through hole is used to place a second shaft connector, which is used to connect one end of the protective shell.

[0011] In one embodiment, the multifunctional engineering calculator further includes a stylus, and the protective cover is provided with a receiving portion for accommodating the stylus.

[0012] In one embodiment, the multifunctional engineering calculator further includes a connecting part disposed on the protective cover, the connecting part being used to detachably fix the protective cover to the user's clothing.

[0013] In one embodiment, the inner walls at both ends of the protective sleeve are provided with protrusions in the middle, the protrusions abut against the calculator, and grooves are provided on both sides of the protrusions, forming a buffer gap between the grooves and the calculator.

[0014] The technical solution of this application employs a multifunctional engineering calculator, comprising: a writing tablet and a protective cover. The protective cover has a first mounting groove, within which the calculator is detachably mounted. The writing tablet has a protective shell, and one side of the protective cover is hinged to the writing tablet so that when the protective shell is closed onto the first mounting groove, the writing tablet is at least partially housed within it. The end of the writing tablet used for handwriting input faces the inner wall of the first mounting groove. Thus, by providing the writing tablet and the protective cover with the first mounting groove, the calculator is detachably mounted on the first mounting groove. When not in use, the end of the writing tablet used for handwriting input can be stored in the first mounting groove of the protective cover, with the protective shell facing outwards. This not only effectively protects the writing tablet from environmental damage but also reduces space occupation and improves portability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the structure of an embodiment of the multifunctional engineering calculator provided in this application;

[0017] Figure 2 A structural exploded view of an embodiment of the multifunctional engineering calculator provided in this application;

[0018] Figure 3 A structural cross-sectional view of an embodiment of the multifunctional engineering calculator provided in this application;

[0019] Figure 4 A schematic diagram of a hinge in one embodiment of the multifunctional engineering calculator provided in this application;

[0020] Figure 5 A schematic diagram of the protective shell structure in one embodiment of the multifunctional engineering calculator provided in this application;

[0021] Figure 6 A schematic diagram of the structure of another embodiment of the multifunctional engineering calculator provided in this application;

[0022] Figure 7 A partial structural schematic diagram of the protective sleeve in one embodiment of the multifunctional engineering calculator provided in this application;

[0023] Figure 8 A cross-sectional schematic diagram of the protective cover and the calculator in one embodiment of the multifunctional engineering calculator provided in this application;

[0024] Figure 9 A cross-sectional schematic diagram of the protective shell and protective sleeve in one embodiment of the multifunctional engineering calculator provided in this application.

[0025] Explanation of icon numbers:

[0026] 1-Handwriting tablet; 11-Protective shell; 111-Opening; 112-Sealing cover; 113-Buffer groove; 114-Protrusion; 115-Second mounting groove; 12-Circuit board; 13-Battery; 14-Handwriting LCD film; 15-Accommodation cavity; 2-Protective sleeve; 21-First mounting groove; 22-Isolation block; 23-Accommodation part; 24-Bottom wall; 25-Protrusion; 26-Groove; 27-Buffer gap; 3-Calculator; 4-Fixing component; 5-Stylus pen; 6-Connecting part; 61-Fixing block; 62-Placement plate; 63-Gap; 7-Hinge; 71-First through hole; 72-Second through hole; 73-First shaft connector; 74-Second shaft connector.

[0027] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0029] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0031] Please refer to Figures 1 to 9 This application proposes a multi-functional engineering calculator, comprising:

[0032] The handwriting tablet 1 and the protective cover 2 are provided. The protective cover 2 is provided with a first mounting groove 21. A calculator 3 is detachably installed in the first mounting groove 21. The handwriting tablet 1 is provided with a protective shell 11. One side of the protective cover 2 is hinged to the handwriting tablet 1 so that when the protective shell 11 is closed on the first mounting groove 21, the handwriting tablet 1 is at least partially housed in the first mounting groove 21. The end of the handwriting tablet 1 used for handwriting input faces the bottom wall 24 of the first mounting groove 21.

[0033] In this embodiment, the handwriting tablet 1 can be made of a capacitive touch screen or an electronic paper display screen, etc., to realize the user's handwriting input function. The protective shell 11 can be formed by the R&D personnel according to the specific shape of the handwriting tablet 1 and different protective functions to form a corresponding protective structure. For example, the protective case 11 can be designed as a flat plate covering the entire area of ​​the handwriting tablet 1 except for the input and display surfaces, or as a frame shape with raised edges on the handwriting tablet 1 to prevent it from being bumped or scratched. Furthermore, the material of the protective case 11 can be varied, such as using soft silicone to increase cushioning or hard plastic to enhance protection. Researchers can flexibly design the shape, material, and structure of the protective case 11 according to the usage environment and user needs of the handwriting tablet 1 to ensure its safety and durability. The shape and depth of the first mounting groove 21 on the protective sleeve 2 can be customized according to the specific dimensions of both the handwriting tablet 1 and the calculator 3 to ensure that the calculator 3 is installed inside the protective sleeve 2 and can accommodate at least part of the handwriting tablet 1. One side of the protective sleeve 2 and the protective case 11 can be connected using a hinge such as a hinge, a sliding hinge, or a dual-axis hinge. The handwriting tablet 1 can be positioned on one side of the left or right side of the protective sleeve 2. Figure 6 As shown, the handwriting tablet 1 can also be disposed on one of the upper or lower sides of the protective cover 2, such as... Figure 1 As shown, this allows the protective case 2 to open and close flexibly relative to the handwriting tablet 1, making it convenient for users to quickly use the handwriting tablet 1 or calculator 3 according to actual needs. The calculator 3 is detachably installed in the first mounting slot 21 and can be connected to the first mounting slot 21 by means of screws, snaps, magnets, etc., to ensure that the calculator 3 is securely installed in the protective case 2 and is not easy to slip off or loosen.

[0034] At the same time, it ensures that the calculator 3 remains stable after installation. In addition, in order to protect the calculator 3 from external environmental interference, such as dust and moisture, the inner wall of the first mounting slot 21 can be provided with waterproof and dustproof sealing material, or other sealing technologies can be used, such as sealing strips or sealing rings, to improve the protection level of the calculator 3.

[0035] In practice, to further enhance the user experience, the outer surface of the protective case 2 can be equipped with anti-slip textures or raised structures to increase stability when held and prevent slippage during use. Furthermore, the color, pattern, and other design elements of the protective case 2 can be personalized to meet the needs of different users.

[0036] In addition, to protect the handwriting tablet 1 and calculator 3 from damage caused by accidental impacts or drops, the protective case 2 can be made of high-strength, wear-resistant materials, such as hard plastic or metal alloys. Furthermore, the edges of the protective case 2 can be fitted with a cushioning layer, such as foam or rubber, to absorb impact and reduce damage to the internal devices.

[0037] Specifically, in order to extend the service life of the handwriting pad 1 inside the engineering calculator 3 with a detachable design and to avoid damage caused by accidental collisions or scratches that could lead to the failure of the handwriting pad 1, the multifunctional engineering calculator is equipped with a handwriting pad 1 and a protective sleeve 2 with a first mounting groove 21. The handwriting pad 1 is provided with a protective shell 11, which is hinged to one end of the protective sleeve 2. Since the end of the handwriting pad 1 used for handwriting input faces the bottom wall 24 of the first mounting groove 21, the handwriting pad 1 can be rotated according to the orientation of the handwriting input end (i.e., the side equipped with the handwriting liquid crystal film) to accommodate at least part of the handwriting pad into the first mounting groove 21; or rotate away from the orientation of the end used for handwriting input, allowing the user to choose to use the handwriting pad 1 or the calculator 3. The first mounting groove 21 can also be detachably equipped with the calculator 3, so that the user can replace or repair it according to actual needs, further improving the practicality and durability of the product.

[0038] In one embodiment, the multifunctional engineering calculator further includes a protective shell 11, and the handwriting tablet 1 is disposed inside the protective shell 11, with the edge of the protective shell 11 protruding toward the end of the handwriting tablet 1 used for handwriting input.

[0039] The multifunctional engineering calculator also includes a protective shell 11, the edge of which protrudes 114 toward the end of the handwriting tablet 1 used for handwriting input to form a second mounting groove 115 for mounting the handwriting tablet 1.

[0040] In the engineering industry, users often need to carry the calculator outdoors in rainy weather or use it in wet or muddy environments. To protect the handwriting tablet 1 from moisture, dust, and other external factors, the above structural design places the tablet within a protective shell 11. The edge of the protective shell 11 is designed to protrude 114 towards the end of the tablet 1 used for handwriting input, forming a second mounting groove 115 at that end. This effectively prevents moisture, dust, and other impurities from seeping in from the edge of the tablet 1, thus protecting the internal electronic components from damage. Furthermore, this design increases the seal between the tablet 1 and the protective shell 11, allowing the tablet 1 to maintain good usability even in harsh environments, extending the overall lifespan of the multi-functional engineering calculator. Simultaneously, the protruding edge 114 also acts as a buffer, preventing the end of the tablet 1 used for handwriting input from directly contacting hard objects and being damaged.

[0041] Please refer to Figure 9 Furthermore, the handwriting tablet 1 is provided with a handwriting liquid crystal film 14, and a buffer groove 113 is provided on the bottom edge of the second mounting groove 115. The width of the handwriting liquid crystal film 14 is smaller than the width of the protective shell 11.

[0042] To prevent the handwriting liquid crystal film 14 from being squeezed and damaged when the protruding part of the edge of the protective shell 11 is subjected to lateral force, a buffer groove 113 is specially provided on the bottom wall edge of the second mounting groove 115. This design allows the buffer groove 113 to effectively absorb and disperse the deformation force of the protruding part 114 of the edge of the protective shell 11 when the edge of the protective shell 11 is subjected to lateral external force impact, thereby protecting the handwriting liquid crystal film 14 from damage. Meanwhile, to prevent the handwriting liquid crystal film 14 from directly contacting the protruding part 114 of the edge of the protective shell 11 within the second mounting groove 115, thus rendering the buffer groove 113 ineffective, the width of the handwriting liquid crystal film 14 is set to be smaller than the width of the protective shell 11 (i.e., there is a negative tolerance in width between the handwriting liquid crystal film 14 and the protective shell 11). When the handwriting liquid crystal film 14 is installed in the second mounting groove 115, the buffer groove 116 can also be used to accommodate the adhesive to bond the handwriting liquid crystal film 115 within the second mounting groove 114. This not only further fixes the handwriting liquid crystal film 14 and prevents it from shifting within the second mounting groove 115, but also ensures that the handwriting liquid crystal film 14 remains flat after installation, avoiding unevenness during use and affecting the accuracy and comfort of handwriting input. In addition, the negative tolerance design facilitates the disassembly and maintenance of the handwriting LCD film 14, making it easy for users to replace the handwriting LCD film 14 when needed, thus improving the practicality and convenience of the multi-functional engineering calculator.

[0043] In one embodiment, the protective sleeve 2 is further provided with a fixing member 4 for fixing the handwriting tablet 1 when it is stored in the first mounting slot 21.

[0044] Since the writing tablet 1 is hinged to one end of the protective sleeve 2, when the writing tablet 1 is stored in the first mounting groove 21, in order to prevent the writing tablet 1 from shaking or slipping out in the first mounting groove 21, the fixing member 4 can be set as an elastic buckle through the above-described structural setting. The elastic buckle can be set in the first mounting groove 21 or on the side wall of the protective sleeve 2. For example, when the writing tablet 1 is stored in the first mounting groove 21, one end of the elastic buckle can be fixed to the inner wall of the first mounting groove 21, and the other end protrudes from the inner wall surface of the first mounting groove 21, forming the buckle fixing member 4. When the writing tablet 1 is stored in the first mounting groove 21, the buckle can elastically buckle on one side or edge of the writing tablet 1, thereby effectively fixing the writing tablet 1 and preventing it from shaking or slipping out in the first mounting groove 21; or, the fixing member 4 can be set as an adjustable lock, and the user can manually adjust the position and tightness of the lock according to the size and thickness of the writing tablet 1 to achieve the best fixing effect. This design not only improves the portability and security of the multifunctional engineering calculator, but also provides more convenience for users in different environments. Alternatively, a magnetic protrusion can be provided at the end of the protective cover 2 facing the handwriting tablet 1. This magnetic protrusion can be connected to the inner protective shell 11 of the handwriting tablet 1 through a hole, and a corresponding magnetic part can be provided near the through hole to attract the magnetic protrusion.

[0045] In one embodiment, the sidewall of the first mounting groove 21 extends inward and is provided with an isolation block 22 for abutting against the surface of the handwriting input end of the handwriting tablet 1.

[0046] To prevent the handwriting input end of the handwriting tablet 1 from directly contacting the calculator 3 when it is closed on the first mounting groove 21, thus causing scratches or damage to the surface of the handwriting liquid crystal film of the handwriting tablet 1, the above-described structure includes an isolation block 22 extending inward from the side wall of the first mounting groove 21 to contact the handwriting input surface of the handwriting tablet 1. The isolation block 22 effectively forms a buffer area between the calculator 3 and the handwriting tablet 1. When the handwriting tablet 1 is closed on the first mounting groove 21, the isolation block 22 will first contact the handwriting input surface (i.e., the handwriting liquid crystal film), instead of the handwriting liquid crystal film 14 of the handwriting tablet 1 directly contacting the calculator 3. In this way, not only is the handwriting liquid crystal film of the handwriting tablet 1 protected from scratches or damage, but the stability and smoothness of the handwriting tablet 1 when closed are also ensured. The material of the isolation block 22 can be a soft and elastic material to better absorb impact and provide additional protection. Furthermore, the design of the isolation block 22 can be customized according to different sizes and shapes of the handwriting tablet 1 to ensure optimal fit and protection. Moreover, if the handwriting tablet 1 is placed inside the protective shell 11, and the edge of the protective shell 11 protrudes towards the end of the handwriting tablet 1 used for handwriting input, the isolation block 22 can also be designed to fit the protruding edge of the protective shell 11, ensuring that when the handwriting tablet 1 is closed, the isolation block 22 can effectively contact the protruding edge of the protective shell 11 without gaps or misalignment. This design not only enhances the fit between the handwriting tablet 1 and the protective shell 11 but also further improves the protective effect of the handwriting liquid crystal film on the handwriting tablet 1.

[0047] In one embodiment, the multifunctional engineering calculator further includes a stylus 5, and the protective cover 2 is provided with a receiving portion 23 for accommodating the stylus 5.

[0048] With the above-described structural design, the stylus 5 can be conveniently stored in the protective sleeve 2, preventing its loss and allowing for quick access when needed. The receiving portion 23 can be positioned at any suitable location on the protective sleeve 2. For example, the receiving portion 23 can have a U-shaped protrusion on one side edge of the protective sleeve 2, allowing the user to easily remove the stylus 5 with one hand. Alternatively, it can have two protrusions with fixing grooves at both ends of one side edge of the protective sleeve 2, with the openings between the two fixing grooves facing each other, so that the top ends of the stylus can be respectively inserted into different fixing grooves, preventing it from swinging or falling out within the receiving portion 23. The shape and size of the receiving portion 23 can be customized according to the actual size of the stylus 5 to ensure that the stylus 5 is securely stored within it and does not easily slip or fall out. Furthermore, the receiving portion 23 can be designed to have a certain degree of elasticity to better secure the stylus 5 and provide some cushioning during use, protecting the stylus 5 from accidental impacts or damage.

[0049] In one embodiment, the multifunctional engineering calculator further includes a connecting part 6, which is disposed on the protective cover 2 and is used to detachably fix the protective cover 2 to the user's clothing.

[0050] With the above-described structural design, the connecting part 6 can be positioned at any location on the protective cover 2, for example, on the back or side of the protective cover 2, allowing users to choose the optimal fixing position according to their personal preferences and usage habits. The connecting part 6 can adopt various forms such as buckles, magnets, and hooks to ensure that the protective cover 2 can be securely fixed to clothing and is not easy to fall off. For example, the buckle type can be designed with a structure with an elastic latch, which can be fastened to the buckle or pocket edge on the clothing to achieve a secure connection; the magnetic type can use the attraction force of a magnet to attach the protective cover 2 to clothing containing metal components, such as coats or shirts with metal zippers or buttons; the hook type can be a small but sturdy metal hook that can be hung on a belt, backpack strap, or other suitable hanging point.

[0051] Preferably, the multifunctional engineering calculator further includes a hinge 7 for flipping the handwriting tablet 1 onto the protective sleeve 2, which has a first mounting groove 21 on the opposite side surface. The hinge 7 has a first through hole 71 and a second through hole 72 at its upper and lower ends, respectively. The first through hole 71 is used to place a first shaft connector 73, which is used to connect one end of the protective sleeve 2. The second through hole 72 is used to place a second shaft connector 74, which is used to connect the protective shell 11.

[0052] With the above structure, a recess for mounting a hinge 7 is provided at one end of the protective sleeve 2. A through hole is provided in the middle region of this end from high to low. The hinge 7 is specifically a double-axis hinge, so that the through hole at the end cooperates with the first axis connector 73 of the double-axis hinge. A corresponding through hole is also provided at one end of the protective shell 11, which cooperates with the second axis connector 74 of the double-axis hinge. The hinge 7 is adjusted to a certain height relative to the hinge point of the protective sleeve 2 (that is, where the protective sleeve 2 connects to the first axis connector 73). The writing tablet 1 can be provided with another degree of rotational freedom in a position perpendicular to the first axis connector 73 through the second axis connector 74. This allows the writing tablet 1 to be rotated to abut against the surface of the protective sleeve 2 where the first mounting groove is provided, making it more comfortable for the user to operate when writing or drawing. The first shaft connector 73 and the second shaft connector 74 can be designed as cylindrical or other suitable shapes to smoothly insert into the first through hole 71 and the second through hole 72 of the hinge 7, and be fixed by fasteners such as screws or clips to ensure a stable connection between the writing tablet 1 and the protective sleeve 2. This structure not only improves the practicality of the multifunctional engineering calculator, but also brings users a more convenient and flexible user experience. The height of the hinge 7 is greater than half the height of the end of the protective sleeve 2, so as to ensure that when the writing tablet 1 is rotated to the side of the protective sleeve 2 away from the first mounting groove 21, it has enough height to bypass the end of the protective sleeve 2 and flip the writing tablet 1 onto the surface of the protective sleeve 2 on the side away from the first mounting groove 21.

[0053] Preferably, the connecting part 6 includes a fixing block 61, which is disposed on the side of the protective sleeve 2 opposite to the side where the first mounting groove is provided. The fixing block 61 is fixed with a placement plate 62, and a gap 63 is formed between the placement plate 62 and the surface of the protective sleeve 2 opposite to the side where the first mounting groove is provided.

[0054] With the above-described configuration, a gap 63 is formed between the placement plate 62 and the protective sleeve 2 on the side surface opposite to the first mounting groove. This gap 63 allows the user's pockets and coat pockets to pass through, and the placement plate 62 supports the multi-functional engineering calculator, preventing it from slipping. Furthermore, when the hinge 7 is specifically a dual-axis hinge, the placement plate 62 can form a placement plane. When the handwriting tablet 1 is rotated for use, the side of the handwriting tablet 1 with the protective shell 11 abuts against the placement plate 62, facilitating handwriting input by the user.

[0055] Please refer to Figure 7 and Figure 8In one embodiment, the inner walls at both ends of the protective sleeve 2 are provided with protrusions 25, which abut against the calculator 3. The two sides of the protrusions 25 are respectively provided with grooves 26, and a buffer gap 27 is formed between the grooves 26 and the calculator 3.

[0056] To prevent damage to the calculator 3 from external impacts during drops, the aforementioned structure incorporates protrusions located in the middle of the upper and lower inner walls of the protective sleeve 2, which abut against the calculator. The grooves 26 on both sides of the protrusions 25 form buffer gaps 27 with the calculator 3. This design allows the upper and lower sides of the calculator 3 to cushion impacts, further protecting it from damage. Furthermore, the design of the protrusions 25 and grooves 26 increases the friction between the protective sleeve 2 and the calculator 3, making the calculator 3 more securely placed within the protective sleeve 2 and less prone to slipping. The protrusions 25 can be designed according to the size and shape of the calculator 3 and can also be customized to suit various functions.

[0057] Specifically, the protective cover 2 is rectangular, with its length and width slightly larger than the length and width of the calculator to facilitate the insertion and removal of the calculator 3. The protective cover 2 can be made of a material with a certain degree of elasticity and wear resistance, such as silicone or rubber, to increase cushioning and extend its service life. Rounded corners can be provided at the four corners of the protective cover 2 to prevent scratching the calculator when it is inserted or removed.

[0058] In one embodiment, the handwriting tablet 1 includes a circuit board 12, a battery 13, and a handwriting liquid crystal film 14. The circuit board 12 is electrically connected to the battery 13. The handwriting liquid crystal film 14 and the protective shell 11 surround to form a receiving cavity 15. The circuit board 12 and the battery 13 are both housed in the receiving cavity 15.

[0059] Through the aforementioned structure, the handwriting tablet 1 maintains a compact design, effectively preventing dust and moisture from entering and improving its durability. Simultaneously, the electrical connection design between the circuit board 12 and the battery 13 ensures the normal operation of the handwriting function, eliminating the need for frequent battery replacements and extending the lifespan of the multi-functional engineering calculator. Furthermore, the cavity 15 formed by the handwriting liquid crystal film 14 and the protective shell 11 not only provides a secure storage space for the circuit board 12 and battery 13 but also makes the handwriting tablet 1 more stable during rotation, enhancing the user's handwriting input experience.

[0060] Preferably, the battery 13 is a button battery 13, and the protective shell 11 is provided with an opening 111 for replacing the button battery 13, and a sealing cap 112 is provided at the opening 111.

[0061] With the aforementioned structure, by using a button cell battery 13, users can easily replace the battery 13 without disassembling the entire handwriting tablet 1, greatly simplifying the maintenance process. The design of the sealing cover 112 further enhances the waterproof and dustproof performance of the handwriting tablet 1, effectively protecting the internal circuitry and battery 13 from damage even in harsh environments. Furthermore, the choice of the button cell battery 13 not only meets the compact design requirements of the handwriting tablet 1 but also ensures sufficient power supply.

[0062] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A multifunctional engineering calculator, characterized in that, include: A handwriting tablet and a protective cover are provided. The protective cover has a first mounting groove in which a calculator is detachably installed. The handwriting tablet has a protective shell. One side of the protective cover is hinged to the handwriting tablet so that when the protective shell is closed on the first mounting groove, the handwriting tablet is at least partially housed in the first mounting groove. The end of the handwriting tablet used for handwriting input faces the bottom wall of the first mounting groove.

2. The multifunctional engineering calculator as described in claim 1, characterized in that, The multifunctional engineering calculator also includes a protective shell, the edge of which protrudes toward the end of the handwriting tablet used for handwriting input to form a second mounting groove for mounting the handwriting tablet.

3. The multifunctional engineering calculator as described in claim 2, characterized in that, The handwriting tablet is provided with a handwriting liquid crystal film, and a buffer groove is provided along the bottom wall edge of the second mounting groove. The width of the handwriting liquid crystal film is smaller than the width of the protective shell.

4. The multifunctional engineering calculator as described in claim 1, characterized in that, The protective cover is also provided with a fixing member for securing the handwriting tablet when it is stored in the first mounting slot.

5. The multifunctional engineering calculator as described in claim 1, characterized in that, The sidewall of the first mounting groove extends inward and is provided with an isolation block for abutting against the surface of the handwriting input end of the handwriting tablet.

6. The multifunctional engineering calculator as described in claim 1, characterized in that, The multifunctional engineering calculator also includes a hinge for flipping the handwriting tablet onto the protective sleeve with a first mounting groove on the opposite side surface. The hinge has a first through hole and a second through hole at its upper and lower ends, respectively. The first through hole is used to place a first shaft connector, which is used to connect one end of the protective sleeve. The second through hole is used to place a second shaft connector, which is used to connect the protective shell.

7. The multifunctional engineering calculator as described in claim 1, characterized in that, The multifunctional engineering calculator also includes a stylus, and the protective cover is provided with a receiving portion for accommodating the stylus.

8. The multifunctional engineering calculator as described in claim 1, characterized in that, The multifunctional engineering calculator also includes a connecting part, which is disposed on the protective cover and is used to detachably fix the protective cover to the user's clothing.

9. The multifunctional engineering calculator as described in claim 8, characterized in that, The connecting part includes a fixing block, which is disposed on the side of the protective sleeve opposite to the side where the first mounting groove is provided. The fixing block is fixed with a placement plate, and a gap is formed between the placement plate and the surface of the protective sleeve opposite to the side where the first mounting groove is provided.

10. The multifunctional engineering calculator as described in claim 1, characterized in that, The inner walls at both ends of the protective sleeve are provided with protrusions in the middle, which abut against the calculator. The two sides of the protrusions are respectively provided with grooves, which form a buffer gap with the calculator.

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