A personal income tax calculation device and method based on information security

Abstract

The present invention discloses a personal income tax accounting device and method based on information security, belonging to the field of personal income tax accounting devices. By improving the existing accounting device and combining it with a mobile phone, it is not only not easy to be lost or forgotten, but also extremely convenient to use, which effectively provides convenience for the accounting of personal income tax. By improving the appearance of the accounting device, it has the function of a mobile phone case, which protects the mobile phone and effectively prevents loss. The accounting device is connected to the mobile phone via Bluetooth, and the accounting result can be directly transmitted to the mobile phone for storage after generating a file, which can effectively prevent information leakage and transmit the file to the personal tax management terminal through the mobile phone, effectively reducing the workload of the management personnel. In addition, the accounting device is opened and used by controlling the mobile phone, which can effectively prevent the accounting device from being stolen by others, and can also effectively prevent it from being misused by others, so as to avoid confusion of the personal tax accounting results.

Description

Technical Field

[0001] The present invention relates to the field of personal income tax calculation devices, and more specifically, to a personal income tax calculation device and method based on information security. Background Art

[0002] Taxation is the main source of fiscal revenue for the country, and it is also the basic guarantee for the normal operation of the huge machine of the country. As taxpayers, we need to bear our own tax responsibilities and obligations. Personal income tax is a tax paid by individuals after they obtain income.

[0003] Generally speaking, we individuals do not need to pay personal income tax directly. The personal income tax we need to pay is generally withheld by the paying unit. The main form of personal income tax we need to pay is wages and salaries. In this way, when the company pays us wages, it will deduct the personal tax that needs to be paid. Of course, the salary declaration of enterprises can now be viewed in the personal tax software. If the actual salary paid by the enterprise is different from the declared salary, we will find it in time. So we also need accounting devices to calculate.

[0004] Existing personal income tax accounting devices, such as the income and personal income tax management and accounting electronic device disclosed in application number: 201910338614.3, although this device has a simple structure, a small size and is easy to carry, and can also perform voice recognition, but due to its small size, it is easier to lose, and it is also easier to put in a corner and difficult to find. In addition, the voice input can be heard by people nearby, which invisibly leaks personal privacy. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a personal income tax accounting device and method based on information security. By improving the existing accounting device and combining it with a mobile phone, it is not only not easy to be lost or forgotten, but also extremely convenient to use, which effectively provides convenience for the accounting of personal income tax. By improving the appearance of the calculator, it has the function of a mobile phone case, which not only protects the mobile phone but also effectively prevents loss. The calculator is connected to the mobile phone via Bluetooth, and the calculation result can be directly transferred to the mobile phone for storage after generating a file, which can effectively prevent information leakage and transfer the file to the personal tax management terminal through the mobile phone, effectively reducing the workload of managers. In addition, the calculator is opened and used under the control of the mobile phone, which can effectively prevent the calculator from being stolen by others, and can also effectively prevent it from being misused by others, so as to avoid confusion of the personal tax accounting results.

[0007] 2. Technical solution

[0008] To solve the above problems, the present invention adopts the following technical solutions.

[0009] A personal income tax accounting device based on information security, comprising a mobile phone and an accounting device, wherein a mobile phone slot matching the mobile phone is provided on the back of the accounting device, and a camera port matching the mobile phone camera is provided on the mobile phone slot, an installation cavity is provided on the front of the accounting device, and an accounting processor is embedded in the installation cavity, the accounting processor comprises a calculation module, a Bluetooth connection module, a document generation module, a file transfer module, an opening and closing module and an operation panel electrically connected to the calculation module, a protective plate is slidably connected to the upper part of the installation cavity, a connecting seat is fixedly connected to the side wall of the protection plate, and a slot matching the connecting seat is provided on the side wall of the installation cavity, a card seat is fixedly connected to the inner wall of the slot, both side walls of the card seat are provided with a clearance groove, and the inner wall of the clearance groove is connected with a hook through a spring, the side wall of the connecting seat is provided with a groove, and the inner wall of the groove is provided with a card slot matching the hook, a cavity is provided at one end of the card seat away from the clearance groove, and an L-shaped through cavity is connected between the cavity and the clearance groove, the L A sliding push piece in contact with the hook is slidably connected to the inner wall of the L-shaped through cavity near the yield groove, the interior of the L-shaped through cavity is filled with a plurality of pressure-resistant balls, and a transmission push piece is slidably connected to one end of the L-shaped through cavity near the cavity, a micro motor electrically connected to the computing processor is installed inside the cavity, and the output end of the micro motor is connected to a gear meshing with the transmission push piece.

[0010] Furthermore, the operation panel includes a keyboard and a display screen, the keyboard includes nine numeric keys, a confirmation key, a delete key, a clear key, a document generation key, and a send key, and the content displayed on the display screen is year and month, salary, various social insurance premiums, special additional deductions, and after-tax income from top to bottom. The operation panel has a simple structure, is easy to operate, has low cost, and is easy to maintain.

[0011] Furthermore, a battery is also provided inside the calculator to provide power for the calculator, and a charging interface connected to the battery is installed on the side wall of the calculator to charge the battery through the charging interface.

[0012] Furthermore, the inner side wall of the protection plate is inlaid with a protection pad, and the protection pad is made of silicone material. The silicone material is relatively soft and can well protect the operation panel to prevent the operation panel from being damaged when the mobile phone calculator falls.

[0013] Furthermore, a storage groove is provided on the outer side wall of the protection plate, and the inner wall of the storage groove is rotatably connected to a bracket via a damping shaft. After the bracket is rotated out of the storage groove, the mobile phone can maintain a tilted posture, thereby realizing the function of a mobile phone bracket.

[0014] Furthermore, the cavity is provided with a limiting cavity away from the inner wall of the L-shaped through cavity, and the transmission push piece extends into the limiting cavity, and the limiting cavity plays a role in allowing the transmission push piece to move in a straight line.

[0015] Furthermore, the transmission push piece includes a rack and a push plate sliding with the L-shaped through cavity, and the length of the transmission push piece is greater than the width of the cavity. When the transmission push piece moves, the push plate pushes the anti-pressure ball to move, and the rack engages with the gear on the micro motor, thereby converting the rotation of the micro motor into linear movement of the transmission push piece.

[0016] Furthermore, the anti-pressure ball is a hollow structure in order to reduce the mass, and the outer diameter of the anti-pressure ball is equal to the inner diameter of the L-shaped cavity so that the anti-pressure ball can just move in the L-shaped cavity to prevent the inner diameter of the L-shaped cavity from being too large and causing the anti-pressure balls to pile up up and down, which not only increases the number of anti-pressure balls but also makes it easy for jamming to occur.

[0017] Furthermore, the calculator and the connecting seat are made of lightweight and drop-resistant materials, which effectively improve the protection performance and service life of the calculator, and the sides of the calculator are wrapped with silicone pads to protect the sides and increase the comfort when holding.

[0018] Furthermore, a method for using the personal income tax calculation device based on information security comprises the following steps:

[0019] S1, first put the calculator on the mobile phone. When an individual needs to calculate his personal income tax for this month, he first turns on the mobile phone's Bluetooth to connect the mobile phone to the calculator, and then controls the opening and closing module through the operation interface on the mobile phone to start the micro motor. The micro motor moves the transmission push piece to the outside of the L-shaped cavity, so that the hook retracts into the clearance groove under the action of the spring. At this time, turn over the mobile phone to push open the protection plate for calculation;

[0020] S2, when calculating, input the corresponding numbers according to the format displayed on the display screen of the operation panel. First, input the year and month, press the confirmation key on the keyboard to automatically jump to the next input line, then input the corresponding numbers of wages, various social insurance premiums, and special additional deductions in sequence, and finally press the calculation key on the keyboard. After the calculation module is run, the after-tax income value of the person for the month is obtained;

[0021] S3, if you want to calculate multiple times for confirmation, press the reset key and repeat step S2 to calculate again. If you want to save the calculated results, press the document generation key, generate a document with the calculation results through the document generation module, and then press the send key to send the document to the mobile phone through the sending module, which is convenient for viewing and also convenient for the individual to sort out the personal income tax paid;

[0022] S4, after the calculation is completed, the protective plate is covered again, and then the mobile phone is operated to start the micro motor again. The micro motor makes the transmission push piece return to the original position, so that the hook and the slot are re-engaged.

[0023] 3. Beneficial effects

[0024] Compared with the prior art, the advantages of the present invention are:

[0025] (1) This solution improves upon the existing accounting device and combines it with a mobile phone. This makes it less likely to be lost or forgotten and extremely convenient to use, which effectively facilitates the accounting of personal income tax. By improving the appearance of the accounting device, it also functions as a mobile phone case, which protects the mobile phone while effectively preventing loss. The accounting device is connected to the mobile phone via Bluetooth, and the calculation results can be directly transferred to the mobile phone for storage after the file is generated. This can effectively prevent information leakage and the file can be transferred to the personal tax management terminal via the mobile phone, effectively reducing the workload of management personnel. In addition, the accounting device is opened and used under the control of the mobile phone, which can effectively prevent the accounting device from being stolen by others and can also effectively prevent it from being misused by others, so as to avoid confusion over the personal tax accounting results.

[0026] (2) The operation panel includes a keyboard and a display screen. The keyboard includes a nine-key numeric key, a confirmation key, a delete key, a clear key, a document generation key, and a send key. The display screen displays the year, month, salary, various social insurance premiums, special additional deductions, and after-tax income from top to bottom. The operation panel has a simple structure, is easy to operate, has low cost, and is easy to maintain.

[0027] (3) A battery is also provided inside the calculator to provide power for the calculator, and a charging interface connected to the battery is installed on the side wall of the calculator to charge the battery.

[0028] (4) The inner side wall of the protection plate is inlaid with a protective pad, and the protective pad is made of silicone material. The silicone material is relatively soft and can well protect the operation panel to prevent the operation panel from being damaged when the mobile phone calculator falls.

[0029] (5) A storage groove is provided on the outer side wall of the protection plate, and the inner wall of the storage groove is rotatably connected to a bracket via a damping shaft. After the bracket is rotated out of the storage groove, the mobile phone can maintain a tilted posture, thereby realizing the function of a mobile phone bracket.

[0030] (6) A limiting cavity is formed in the cavity away from the inner wall of the L-shaped through cavity, and the transmission push piece extends into the limiting cavity. The limiting cavity allows the transmission push piece to move in a straight line.

[0031] (7) The transmission push piece includes a rack and a push plate sliding with the L-shaped cavity, and the length of the transmission push piece is greater than the width of the cavity. When the transmission push piece moves, the push plate pushes the anti-pressure ball to move, and the rack meshes with the gear on the micro motor, thereby realizing the conversion of the rotation of the micro motor into the linear movement of the transmission push piece.

[0032] (8) The anti-pressure ball is a hollow structure in order to reduce the mass, and the outer diameter of the anti-pressure ball is equal to the inner diameter of the L-shaped cavity so that the anti-pressure ball can just move in the L-shaped cavity to prevent the inner diameter of the L-shaped cavity from being too large and causing the anti-pressure balls to pile up, which not only increases the number of anti-pressure balls but also makes it easy to cause jamming.

[0033] (9) The calculator and the connector are made of lightweight, drop-resistant material, which effectively improves the protection performance and service life of the calculator. The sides of the calculator are wrapped with silicone pads to protect the sides and increase the comfort when holding. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the front and back sides of the present invention;

[0035] Figure 2 It is a back schematic diagram of the present invention;

[0036] Figure 3 It is a cross-sectional schematic diagram of the card holder of the present invention;

[0037] Figure 4 is a schematic cross-sectional view of a protection plate of the present invention;

[0038] Figure 5 This is a schematic diagram of the protective plate of the present invention in a closed state;

[0039] Figure 6 This is a schematic diagram of the protective plate of the present invention in an open state;

[0040] Figure 7 It is the module principle diagram of the present invention;

[0041] Figure 8 It is a schematic diagram of the display content of the operation panel of the present invention.

[0042] Description of reference numerals in the figures:

[0043] 1 calculator, 101 mobile phone slot, 102 camera port, 2 operation panel, 201 charging interface, 3 protection plate, 301 protection pad, 302 bracket, 4 connecting seat, 401 card slot, 5 card seat, 501 make way slot, 502 cavity, 503 L-shaped through cavity, 504 limit cavity, 6 hook, 7 sliding push piece, 8 anti-pressure ball, 9 transmission push piece, 10 micro motor. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] Example:

[0048] See also Figure 1-8 , a personal income tax accounting device based on information security, please refer to Figure 1 2, comprising a mobile phone and a calculator 1, the back of the calculator 1 is provided with a mobile phone slot 101 matching the mobile phone, and the mobile phone slot 101 is provided with a camera port 102 matching the mobile phone camera, the inside of the calculator 1 is also provided with a battery, the battery provides power for the calculator 1, and the side wall of the calculator 1 is provided with a charging interface 201 connected to the battery, and the battery is charged through the charging interface 201;

[0049] See also Figure 7 , 8The front of the calculator 1 is provided with an installation cavity, and an accounting processor is embedded in the installation cavity. The accounting processor includes a calculation module, a Bluetooth connection module, a document generation module, a file transfer module, an opening and closing module, and an operation panel 2 electrically connected to the calculation module. The operation panel 2 includes a keyboard and a display screen. The keyboard includes nine numeric keys, a confirmation key, a delete key, a reset key, a document generation key, and a send key. The contents displayed on the display screen are year and month, salary, various social insurance premiums, special additional deductions, and after-tax income from top to bottom. The operation panel 2 has a simple structure, is easy to operate, has low cost, and is easy to maintain. The calculation module is the same as the calculation method of the calculator in the prior art.

[0050] See also Figure 1 , 4 The upper part of the installation cavity is slidably connected with a protection plate 3, and the inner side wall of the protection plate 3 is inlaid with a protection pad 301, and the protection pad 301 is made of silicone material. The silicone material is relatively soft and can well protect the operation panel 2 to prevent the operation panel 2 from being damaged when the mobile phone calculator 1 falls. The outer side wall of the protection plate 3 is provided with a storage groove, and the inner wall of the storage groove is rotatably connected with a bracket 302 through a damping shaft. After the bracket 302 is rotated out of the storage groove, the mobile phone can be kept in an inclined posture, realizing the function of the mobile phone bracket;

[0051] See also Figure 3 , 5, 6. The side wall of the protection plate 3 is fixedly connected with a connecting seat 4. The calculator 1 and the connecting seat 4 are made of lightweight and drop-resistant material, which effectively improves the protection performance and service life of the calculator 1. The side of the calculator 1 is wrapped with a silicone pad to protect the side and increase the comfort when holding it. The side wall of the installation cavity is provided with a slot matching the connecting seat 4. The inner wall of the slot is fixedly connected with a card seat 5. The side walls of the card seat 5 on both sides are provided with a clearance groove 501, and the inner wall of the clearance groove 501 is connected with a hook 6 through a spring. The side wall of the connecting seat 4 is provided with a groove, and the inner wall of the groove is provided with a groove 401 matching the hook 6. The end of the card seat 5 away from the clearance groove 501 is provided with a cavity 502, and the cavity 502 The L-shaped through cavity 503 is connected to the clearance groove 501. The L-shaped through cavity 503 is slidably connected to the inner wall of the clearance groove 501 with a sliding push piece 7 in contact with the hook 6. The interior of the L-shaped through cavity 503 is filled with a plurality of anti-pressure balls 8. The anti-pressure balls 8 are hollow structures in order to reduce the weight. The outer diameter of the anti-pressure balls 8 is equal to the inner diameter of the L-shaped through cavity 503, so that the anti-pressure balls 8 can just move in the L-shaped through cavity 503 to prevent the inner diameter of the L-shaped through cavity 503 from being too large and causing the anti-pressure balls 8 to pile up up and down, which not only increases the number of anti-pressure balls 8 but also makes it easy to get stuck. The L-shaped through cavity 503 is slidably connected to one end near the cavity 502. The transmission push piece 9 includes a rack and a push plate sliding with the L-shaped through cavity 503, and the length of the transmission push piece 9 is greater than the width of the cavity 502. When the transmission push piece 9 moves, the push plate pushes the anti-pressure ball 8 to move, and the rack is meshed with the gear on the micro motor 10, thereby realizing the conversion of the rotation of the micro motor 10 into the linear movement of the transmission push piece 9. The cavity 502 is provided with a limit cavity 504 away from the inner wall of the L-shaped through cavity 503, and the transmission push piece 9 extends into the limit cavity 504. The limit cavity 504 plays a role in allowing the transmission push piece 9 to move in a straight line. A micro motor 10 electrically connected to the computing processor is installed inside the cavity 502, and the output end of the micro motor 10 is connected to a gear meshing with the transmission push piece 9.

[0052] The method for using the device comprises the following steps:

[0053] S1, first put the calculator 1 on the mobile phone. When an individual needs to calculate his personal income tax for this month, he first turns on the mobile phone Bluetooth to connect the mobile phone with the calculator 1, and then controls the opening and closing module through the operation interface on the mobile phone to start the micro motor 10. The micro motor 10 makes the transmission push piece 9 move to the outside of the L-shaped cavity 503, so that the hook 6 retracts into the clearance groove 501 under the action of the spring. At this time, the mobile phone is turned over to push open the protection plate 3 for accounting;

[0054] S2, when calculating, input the corresponding numbers according to the format displayed on the display screen of the operation panel 2, first input the year and month, press the confirmation key on the keyboard to automatically jump to the next input line, then input the corresponding numbers of wages, various social insurance premiums, and special additional deductions in sequence, and finally press the calculation key on the keyboard. After the calculation module is run, the after-tax income value of the person for the month is obtained;

[0055] S3, if you want to calculate multiple times for confirmation, press the reset key and repeat step S2 to calculate again. If you want to save the calculated results, press the document generation key, generate a document with the calculation results through the document generation module, and then press the send key to send the document to the mobile phone through the sending module, which is convenient for viewing and also convenient for the individual to sort out the personal income tax paid;

[0056] S4, after the calculation is completed, the protective plate 3 is covered again, and then the mobile phone is operated to start the micro motor 10 again, and the micro motor 10 makes the transmission push piece 9 return to the original position, so that the hook 6 and the slot 401 are re-engaged.

[0057] By improving the existing accounting device and combining it with a mobile phone, it is not only not easy to be lost or forgotten, but also extremely convenient to use, which effectively provides convenience for the accounting of personal income tax. By improving the appearance of the accounting device 1, it has the function of a mobile phone case, which protects the mobile phone while effectively preventing loss. The accounting device 1 is connected to the mobile phone via Bluetooth, and the accounting result can be directly transferred to the mobile phone for storage after the file is generated. It can effectively prevent information leakage and the file can be transferred to the personal tax management terminal through the mobile phone, effectively reducing the workload of managers. In addition, the accounting device 1 is opened and used by controlling the mobile phone, which can effectively prevent the accounting device 1 from being stolen by others, and can also effectively prevent it from being misused by others, so as to avoid confusion in the personal tax accounting results.

[0058] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and improved concepts of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. An individual income tax accounting device based on information security, comprising a mobile phone and an accounting device (1), wherein the back of the accounting device (1) is provided with a mobile phone slot (101) matching the mobile phone, and the mobile phone slot (101) is provided with a camera port (102) matching the camera of the mobile phone, characterized in that: The calculator (1) is provided with an installation cavity on the front side, and a calculation processor is embedded in the installation cavity. The calculation processor includes a calculation module, a Bluetooth connection module, a document generation module, a file transfer module, an opening and closing module, and an operation panel (2) electrically connected to the calculation module. The upper part of the installation cavity is slidably connected to a protection plate (3), the side wall of the protection plate (3) is fixedly connected to a connection seat (4), and the side wall of the installation cavity is provided with a slot matching the connection seat (4), the inner wall of the slot is fixedly connected to a card seat (5), both side walls of the card seat (5) are provided with a clearance groove (501), and the inner wall of the clearance groove (501) is connected to a hook (6) through a spring, and the side wall of the connection seat (4) is provided with a groove, and the inner wall of the groove is provided with a groove. A card slot (401) is provided to match the card hook (6); a cavity (502) is provided at one end of the card seat (5) away from the clearance slot (501); an L-shaped through cavity (503) is connected between the cavity (502) and the clearance slot (501); a sliding push piece (7) in contact with the card hook (6) is slidably connected to the inner wall of the L-shaped through cavity (503) close to the clearance slot (501); a plurality of pressure-resistant balls (8) are filled inside the L-shaped through cavity (503); a transmission push piece (9) is slidably connected to one end of the L-shaped through cavity (503) close to the cavity (502); a micro motor (10) electrically connected to the computing processor is installed inside the cavity (502); and a gear meshing with the transmission push piece (9) is connected to the output end of the micro motor (10).

2. According to claim 1, a personal income tax calculation device based on information security is characterized by: The operation panel (2) comprises a keyboard and a display screen, wherein the keyboard comprises nine numeric keys, a confirmation key, a delete key, a reset key, a document generation key, and a send key, and the contents displayed on the display screen are, from top to bottom, year and month, salary, various social insurance premiums, special additional deductions, and after-tax income.

3. According to claim 1, a personal income tax calculation device based on information security is characterized by: A storage battery is also arranged inside the calculator (1), and a charging interface (201) connected to the storage battery is installed on the side wall of the calculator (1).

4. According to claim 1, a personal income tax calculation device based on information security is characterized by: The inner side wall of the protection plate (3) is inlaid with a protection pad (301), and the protection pad (301) is made of silica gel.

5. The personal income tax calculation device based on information security according to claim 1 is characterized by: The outer side wall of the protection plate (3) is provided with a receiving groove, and the inner wall of the receiving groove is rotatably connected to a bracket (302) via a damping shaft.

6. The personal income tax calculation device based on information security according to claim 1 is characterized by: The cavity (502) is provided with a limiting cavity (504) away from the inner wall of the L-shaped through cavity (503), and the transmission push piece (9) extends into the limiting cavity (504).

7. The personal income tax calculation device based on information security according to claim 1 is characterized by: The transmission push piece (9) comprises a rack and a push plate sliding with the L-shaped through cavity (503), and the length of the transmission push piece (9) is greater than the width of the cavity (502).

8. The personal income tax calculation device based on information security according to claim 1 is characterized by: The anti-pressure ball (8) is a hollow structure, and the outer diameter of the anti-pressure ball (8) is equal to the inner diameter of the L-shaped through cavity (503).

9. The personal income tax calculation device based on information security according to claim 1 is characterized by: The calculator (1) and the connecting seat (4) are made of lightweight, drop-resistant material, and the sides of the calculator (1) are wrapped with a silicone pad.

10. A method for using the personal income tax calculation device based on information security according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, firstly, the calculator (1) is put on the mobile phone. When an individual needs to calculate his / her personal income tax for this month, the mobile phone Bluetooth is turned on to connect the mobile phone with the calculator (1). Then, the opening and closing module is controlled through the operation interface on the mobile phone to start the micro motor (10). The micro motor (10) causes the transmission push piece (9) to move to the outside of the L-shaped cavity (503), so that the hook (6) is retracted into the clearance groove (501) under the action of the spring. At this time, the mobile phone is turned over to push open the protection plate (3) to perform calculation; S2, when calculating, input the corresponding numbers according to the format displayed on the display screen of the operation panel (2), first input the year and month, press the confirmation key on the keyboard to automatically jump to the next input line, then input the corresponding numbers of wages, various social insurance premiums, and special additional deductions in sequence, and finally press the calculation key on the keyboard. After the calculation module is run, the after-tax income value of the person for the month is obtained; S3, if you want to calculate multiple times for confirmation, press the reset key and repeat step S2 to calculate again. If you want to save the calculated results, press the document generation key, generate a document with the calculation results through the document generation module, and then press the send key to send the document to the mobile phone through the sending module, which is convenient for viewing and also convenient for the individual to sort out the personal income tax paid; S4, after the calculation is completed, the protective plate (3) is covered again, and then the mobile phone is operated to start the micro motor (10) again, and the micro motor (10) makes the transmission push piece (9) return to the original position, so that the hook (6) and the slot (401) are re-engaged.

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