Energy-saving certificate printing equipment

Abstract

The invention relates to the field of printing equipment, in particular to energy-saving certificate printing equipment which comprises a powder storage box, a powder storage tank, a powder storage box, a communicating pipe and a gathering pipe, multiple mounting grooves are formed in one side of the powder storage box, the powder storage tank is slidably embedded in the mounting grooves, and the multiple mounting grooves are formed in the length direction of the powder storage box at intervals; the powder storage tanks and the mounting grooves are arranged in a one-to-one correspondence manner, the powder storage box is provided with a mounting cavity, the powder storage box is arranged in the mounting cavity, the groove bottom of each mounting groove is provided with a communicating opening, the opening of each powder storage tank is communicated with the communicating opening, one end of the communicating pipe is communicated with the communicating opening, the other end of the communicating pipe is communicated with the gathering pipe, and the gathering pipe is communicated with the powder storage box. The multiple powder storage tanks are communicated with the powder storage box, when carbon powder in one powder storage tank is used up, the other powder storage tank can supplement and supply materials in time, equipment operation does not need to be stopped, the used powder storage tank does not need to be replaced, energy is saved, and the working efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of printing equipment, and in particular to an energy-saving certificate printing equipment. Background Art

[0002] A certificate is a document that proves a person or organization holds a certain qualification, qualification, or honor. Depending on the purpose of the certificate, different printing equipment is required to print different text and images on the certificate.

[0003] A digital printing press is a device that prints digital images or text directly onto paper or other materials. Laser toner printing is a type of digital printing technology that uses a laser beam to melt toner particles and attach them to the surface of paper or other materials, forming images or text. A laser toner printer typically consists of a laser, toner cartridge, imaging drum, fixing system, and control system. The toner in the toner cartridge adheres to the imaging drum through electrostatic adsorption, forming a toner image. The imaging drum then transfers the toner image to paper or other materials. After heat and pressure are applied by the fixing system, the toner melts and fixes it to the paper, forming the final printed product.

[0004] During the printing process, if a certain color of toner runs out, the entire device needs to be paused to replace the toner cartridge, which affects work efficiency. Pausing and restarting the device wastes energy. Summary of the Invention

[0005] In order to improve work efficiency, the present application provides an energy-saving certificate printing device.

[0006] The energy-saving certificate printing device provided in this application adopts the following technical solutions: An energy-saving certificate printing device includes a powder storage box, a powder storage tank, a powder storage box, a connecting pipe and a collecting pipe. A mounting groove is provided on one side of the powder storage box, and the powder storage tank is slidably embedded in the mounting groove. There are multiple mounting grooves, and the multiple mounting grooves are arranged at intervals along the length direction of the powder storage box. There are multiple powder storage tanks, and the powder storage tanks are arranged in a one-to-one correspondence with the mounting grooves. The powder storage box is provided with a mounting cavity, and the powder storage box is arranged in the mounting cavity. The bottom of the mounting groove is provided with a connecting port, the opening of the powder storage tank is connected to the connecting port, one end of the connecting pipe is connected to the connecting port, and the other end of the connecting pipe is connected to the collecting pipe, and the collecting pipe is connected to the powder storage box.

[0007] By adopting the above technical solution, the carbon powder accumulated in the powder storage box can allow the equipment to continue working for a period of time when the powder storage tank is used up. Multiple powder storage tanks are connected to the powder storage box. When the carbon powder in one powder storage tank is used up, the other powder storage tank can replenish the supply in time. There is no need to stop the equipment to replace the used powder storage tank, which saves energy and improves work efficiency.

[0008] Preferably, it further comprises a control valve, which is connected to the inner wall of the connecting pipe and is used to control the opening and closing of the connecting pipe.

[0009] By adopting the above technical solution, a control valve is used to control the on-off of the connecting pipe, so that when the carbon powder in one powder storage tank is used up, the other powder storage tank starts to supply the powder storage box, so that the staff can have more time to replace the powder storage tank, so that the equipment can operate stably.

[0010] Preferably, it also includes a shielding cover, which is hinged to the inner wall of the connecting pipe, the hinge axis of the shielding cover and the inner wall of the connecting pipe is horizontal, the hinge end of the shielding cover abuts the downward inner wall of the connecting pipe, and the shielding cover is used to cover the opening of the powder storage tank.

[0011] By adopting the above technical solution, when the powder storage tank is discharging, the carbon powder flows into the connecting pipe, causing the shielding cover to automatically open and remain open during the discharging process. When the carbon powder in the powder storage tank is basically used up, the shielding cover is automatically closed by gravity, so that when the carbon powder tank is replaced, the carbon powder in the connecting pipe is not easy to enter the installation slot, thereby reducing resource waste.

[0012] Preferably, a fixing block is further included, the groove wall of the installation groove is provided with a fixing groove, the fixing block is slidably connected to the groove wall of the fixing groove, the outer wall of the powder storage tank is provided with a card groove, and the fixing block is used to be embedded in the card groove.

[0013] By adopting the above technical solution, when the powder storage tank is arranged in the installation groove, the fixed block positions the position of the powder storage tank, reducing the probability of the powder storage tank moving during the powder supply process, reducing the probability of carbon powder leakage, reducing resource waste, and improving the stability of equipment operation.

[0014] Preferably, it further includes a first spring, one end of which is fixedly connected to the bottom of the fixing groove, and the other end of the first spring is fixedly connected to the fixing block, and the end of the fixing block facing away from the bottom of the mounting groove is provided with a guide surface, and the distance from the guide surface to the bottom of the mounting groove decreases as it moves away from the first spring.

[0015] By adopting the above technical solution, the fixing block cooperates with the first spring, so that the powder storage tank is automatically positioned and fixed when it is installed in the installation groove, thereby improving the replacement efficiency of the powder storage tank.

[0016] Preferably, it also includes an unlocking rod, the powder storage box is provided with an unlocking groove, the unlocking groove and the mounting groove are provided on the same side of the powder storage box, the unlocking groove is connected to the fixed groove, the unlocking rod is slidably connected to the groove wall of the unlocking groove, the unlocking rod extends out of the unlocking groove at one end away from the fixed block, and the fixed block is provided with an abutting groove at one end away from the bottom of the mounting groove, the abutting groove is provided with an abutting surface facing the groove wall of the mounting groove, the distance from the abutting surface to the bottom of the mounting groove decreases as it moves away from the first spring, and the unlocking rod abuts the abutting surface.

[0017] By adopting the above technical solution, the unlocking rod is pushed to slide, and the unlocking rod abuts the abutting surface to move the fixed block away from the powder storage tank, which makes it easy to replace the powder storage tank.

[0018] Preferably, the device further comprises a second spring, one end of the second spring is connected to the bottom of the mounting groove, and the other end of the second spring is connected to the powder storage tank.

[0019] By adopting the above technical solution, when the fixing block is away from the powder storage tank, the second spring causes the powder storage tank to automatically extend out of the mounting slot, making it easier for people to take out the powder storage tank and improving replacement efficiency.

[0020] Preferably, it also includes a first gear, a locking rod and a first rack, the hinge shaft of the shielding cover extends out of the connecting pipe, the first gear is arranged on the outer periphery of the connecting pipe, the first gear is coaxially fixedly connected to the hinge shaft of the shielding cover, the powder storage box is provided with a connecting port, the connecting port and the unlocking groove are respectively provided on both sides of the fixed groove, the end of the fixed block away from the unlocking rod is provided with a locking port, the connecting port is connected to the locking port, the locking rod is slidably connected to the inner wall of the connecting port, the locking port is used for the locking rod to extend into, the first rack is engaged with the first gear, and the locking rod is fixedly connected to the first rack.

[0021] By adopting the above technical solution, when the shielding cover is opened, the hinge shaft of the shielding cover rotates, the first gear rotates, and the first rack drives the locking rod to slide into the locking mouth, locking the position of the fixed block, so that the unlocking rod cannot slide to unlock, thereby avoiding the staff's accidental unlocking operation causing toner leakage and reducing resource waste.

[0022] Preferably, it also includes a warning rod, a second gear and a second rack. The powder storage box is provided with a warning port, the length direction of the warning port is parallel to the length direction of the mounting groove, the warning rod is slidably connected to the inner wall of the warning port, one end of the warning rod extends out of the warning port, the hinge shaft of the shielding cover extends out of the connecting pipe, the second gear is provided on the outer periphery of the connecting pipe, the second gear is coaxially fixedly connected to the hinge shaft of the shielding cover, the second rack is engaged with the second gear, and the second rack is fixedly connected to the warning rod.

[0023] By adopting the above technical solution, when the shielding cover is closed, the hinge shaft of the shielding cover rotates, the second gear rotates, and the second rack drives the warning rod to slide, reminding that the carbon powder in the powder storage tank has been used up.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The carbon powder accumulated in the powder storage box can keep the equipment working for a period of time when the powder storage tank is used up. Multiple powder storage tanks are connected to the powder storage box. When the carbon powder in one powder storage tank is used up, another powder storage tank can be replenished in time. There is no need to stop the equipment to replace the used powder storage tank, saving energy and improving work efficiency. 2. When the shielding cover is opened, the hinge shaft of the shielding cover rotates, the first gear rotates, and the first rack drives the locking rod to slide into the locking hole, locking the position of the fixed block so that the unlocking rod cannot slide to unlock, thereby preventing the staff from accidentally unlocking the lock and causing toner leakage, reducing resource waste; 3. When the shielding cover is closed, the hinge shaft of the shielding cover rotates, the second gear rotates, and the second rack drives the warning rod to slide, reminding that the toner in the powder storage tank has been used up. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of energy-saving certificate printing equipment.

[0026] Figure 2 A cross-sectional view of an energy-saving certificate printing device.

[0027] Figure 3 It is a schematic diagram of the internal structure of an energy-saving certificate printing device after being cut open.

[0028] Figure 4 It is a schematic diagram of the overall structure of the powder storage tank and installation components.

[0029] Figure 5 This is a schematic diagram of the internal structure after the powder storage box, powder storage tank, powder storage box, printing component, control component and installation component are cut away.

[0030] Explanation of reference numerals: 1. Main body; 11. Accommodating chamber; 2. Powder storage box; 21. Mounting slot; 211. Communication port; 212. Fixing slot; 22. Mounting chamber; 23. Discharge port; 24. Placement chamber; 25. Unlocking slot; 26. Warning port; 27. Connecting port; 3. Powder storage tank; 31. Card slot; 4. Powder storage box; 41. Discharge port; 5. Printing assembly; 51. Sponge roller; 52. Developing roller; 53. OPC drum; 54. Charging roller; 55. Rotating roller Printing roller; 6. Control assembly; 61. Connecting pipe; 62. Collecting pipe; 63. Control valve; 64. Shielding cover; 7. Mounting assembly; 71. Fixing block; 711. Guide surface; 712. Abutment groove; 713. Abutment surface; 714. Locking port; 72. First spring; 73. Unlocking lever; 74. Second spring; 751. First gear; 752. Second gear; 76. Locking lever; 77. First rack; 78. Warning lever; 79. Second rack. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-5 This application is described in further detail.

[0032] The present application embodiment discloses an energy-saving certificate printing device. Figure 1 and Figure 2 An energy-saving certificate printing device includes a main body 1, a powder storage box 2, a powder storage tank 3, a powder storage box 4 and a printing component 5.

[0033] Reference Figure 3 The powder storage box 2 is fixedly connected to the upper end of the main body 1, and a mounting groove 21 is provided on one side of the powder storage box 2. The height of the axis of the mounting groove 21 decreases as it approaches the bottom of the groove 21. There are eight mounting grooves 21, and the eight mounting grooves 21 are arranged at intervals along the length direction of the powder storage box 2. There are eight powder storage tanks 3, and the powder storage tanks 3 are arranged one by one corresponding to the mounting grooves 21. The powder storage tanks 3 are slidably embedded in the mounting grooves 21. The powder storage tanks 3 are evenly divided into four groups, each group corresponding to the same color, and each group of powder storage tanks 3 is provided with two. The powder storage tanks 3 of the same color are arranged in adjacent mounting grooves 21. The bottom of the mounting groove 21 is provided with a connecting port 211. The outer diameter of the tank mouth of the powder storage tank 3 is smaller than the diameter of the tank body of the powder storage tank 3. The outer wall of the tank mouth of the powder storage tank 3 fits the inner wall of the connecting port 211, and the tank mouth of the powder storage tank 3 is connected to the connecting port 211.

[0034] The powder storage box 2 is provided with an installation cavity 22, which is provided below the installation groove 21. There are four installation cavities 22, and the four installation cavities 22 are arranged at intervals along the length direction of the powder storage box 2. The powder storage box 4 is fixedly connected to the inner wall of the installation cavity 22. There are four powder storage boxes 4, and the powder storage boxes 4 are arranged one-to-one with the installation cavities 22. Each powder storage box 4 corresponds to two powder storage tanks 3 of the same color.

[0035] Reference Figure 2The lower end of the powder storage box 2 is provided with a discharge port 23, the main body 1 is provided with a accommodating cavity 11, the lower end of the powder storage box 4 extends out of the discharge port 23 and extends into the accommodating cavity 11, and the side wall of the lower end of the powder storage box 4 is provided with a discharge port 41, the length direction of the discharge port 41 is parallel to the width direction of the main body 1, and the discharge port 41 is connected to the accommodating cavity 11.

[0036] Reference Figure 2 The printing assembly 5 includes a sponge roller 51, a developing roller 52, an OPC drum 53, a charging roller 54, and a transfer roller 55. The sponge roller 51, the developing roller 52, the OPC drum 53, the charging roller 54, and the transfer roller 55 are all connected to the inner wall of the accommodating chamber 11 and rotate around their own axes. The driving motor drives the sponge roller 51, the developing roller 52, the OPC drum 53, the charging roller 54, and the transfer roller 55 to rotate. The rotation axes of the sponge roller 51, the developing roller 52, the OPC drum 53, the charging roller 54, and the transfer roller 55 are all parallel to each other, and the rotation axis of the sponge roller 51 is parallel to the length direction of the discharge port 41.

[0037] The sponge roller 51 is arranged near the discharge port 41, and the developing roller 52 is arranged on the side of the sponge roller 51 away from the discharge port 41. The sponge roller 51 is used to adhere to the carbon powder discharged from the discharge port 41 and provide carbon powder to the developing roller 52. The OPC drum 53 is arranged on the side of the developing roller 52 away from the sponge roller 51. The laser changes part of the charge on the surface of the OPC drum 53 into a positive charge. The charging roller 54 is arranged above the OPC drum 53. The charging roller 54 applies a negative charge on the surface of the OPC drum 53. The developing roller 52 attaches the carbon powder to the positively charged surface of the OPC drum 53. The transfer roller 55 is arranged below the OPC drum 53. The paper is arranged between the transfer roller 55 and the OPC drum 53. The surface of the transfer roller 55 has a negative charge, and the positively charged carbon powder on the surface of the OPC drum 53 is adsorbed on the paper.

[0038] Reference Figure 3 , an energy-saving certificate printing device also includes a control component 6 and an installation component 7. The control component 6 includes a connecting pipe 61, a collecting pipe 62, a control valve 63 and a shielding cover 64. The powder storage box 2 is provided with a placement cavity 24, the placement cavity 24 is provided above the installation cavity 22, the placement cavity 24 is provided on the side of the powder storage tank 3 close to the connecting port 211, the connecting pipe 61 is provided in the placement cavity 24, one end of the connecting pipe 61 is connected to the connecting port 211, the other end of the connecting pipe 61 is connected to one end of the collecting pipe 62, and the other end of the collecting pipe 62 is connected to the powder storage box 4, there are eight connecting pipes 61, and the connecting pipes 61 are arranged in a one-to-one correspondence with the powder storage tank 3, there are four collecting pipes 62, and the collecting pipes 62 are arranged in a one-to-one correspondence with the powder storage box 4, and two connecting pipes 61 correspond to one collecting pipe 62.

[0039] A control valve 63 is connected to the inner wall of the connecting tube 61 and is used to control the opening and closing of the connecting tube 61. Eight control valves 63 are provided, one corresponding to each connecting tube 61. The control valves 63 can be ball valves. A shielding cover 64 is hinged to the inner wall of the connecting tube 61. The hinge axis of the shielding cover 64 and the inner wall of the connecting tube 61 are parallel, and the hinged end of the shielding cover 64 abuts the downward-facing inner wall of the connecting tube 61. The shielding cover 64 is used to cover the tank opening of the powder storage tank 3. The hinge axis of the shielding cover 64 extends out of the connecting tube 61. The shielding cover 64 is located between the control valve 63 and the connecting port 211.

[0040] The controller is electrically connected to the control valve 63, the distance sensor is arranged between the control valve 63 and the shielding cover 64, and the distance sensor is connected to the inner wall of the connecting pipe 61. The distance sensor is used to detect the distance between the detection point and the shielding cover 64, and send the detection value to the controller. After receiving the detection value, the controller determines the state of the shielding cover 64, and then determines the state of the powder storage tank 3, and controls the opening and closing of the control valve 63 to realize the on-off control of the connecting pipe 61.

[0041] Reference Figure 4 The mounting assembly 7 includes a fixing block 71 , a first spring 72 , an unlocking lever 73 , a second spring 74 , a first gear 751 , a second gear 752 , a locking lever 76 , a first rack 77 , a warning lever 78 and a second rack 79 .

[0042] Reference Figure 3 and Figure 4 The downward-facing wall of the mounting groove 21 is provided with a fixing groove 212, and the fixing block 71 is slidably connected to the wall of the fixing groove 212. The outer wall of the powder storage tank 3 is provided with a clamping groove 31. The clamping groove 31 is annular and coaxial with the powder storage tank 3, and is used to accommodate the fixing block 71. One end of the first spring 72 is fixedly connected to the bottom of the fixing groove 212, and the other end of the first spring 72 is fixedly connected to the fixing block 71. The end of the fixing block 71 facing away from the bottom of the mounting groove 21 is provided with a guide surface 711. The distance between the guide surface 711 and the bottom of the mounting groove 21 decreases as it moves away from the first spring 72.

[0043] The powder storage box 2 is provided with an unlocking slot 25, and the unlocking slot 25 and the mounting slot 21 are provided on the same side of the powder storage box 2. The bottom of the unlocking slot 25 is connected to the fixed slot 212, and the unlocking rod 73 is slidably connected to the slot wall of the unlocking slot 25. The end of the unlocking rod 73 away from the fixed block 71 extends out of the slot opening of the unlocking slot 25, and the end of the fixed block 71 away from the bottom of the mounting slot 21 is provided with an abutting slot 712, and the slot wall of the abutting slot 712 facing the mounting slot 21 is set as an abutting surface 713, and the distance from the abutting surface 713 to the bottom of the mounting slot 21 decreases as it moves away from the first spring 72. The unlocking rod 73 abuts the abutting surface 713, one end of the second spring 74 is connected to the bottom of the mounting slot 21, and the other end of the second spring 74 is connected to the powder storage tank 3, and the second spring 74 is provided on the outer periphery of the tank mouth of the powder storage tank 3.

[0044] Reference Figure 4 and Figure 5 The first gear 751 and the second gear 752 are arranged on both sides of the connecting pipe 61, and the first gear 751 and the second gear 752 are coaxially fixedly connected to the two ends of the hinge shaft of the shielding cover 64.

[0045] Reference Figure 3 and Figure 4 The powder storage box 2 is provided with a connecting port 27, and the connecting port 27 and the unlocking slot 25 are respectively provided on both sides of the fixed slot 212. The length direction of the connecting port 27 is parallel to the length direction of the unlocking slot 25. The end of the fixed block 71 away from the unlocking rod 73 is provided with a locking port 714, and the communicating port 211 is connected to the locking port 714. The locking rod 76 is slidably connected to the inner wall of the communicating port 211. The locking port 714 is used for the locking rod 76 to extend into. The first rack 77 is engaged with the upper end of the first gear 751, and the locking rod 76 is fixedly connected to one end of the first rack 77.

[0046] A warning port 26 is provided on one side of the powder storage box 2. The warning port 26 and the mounting groove 21 are provided on the same side of the powder storage box 2. The length direction of the warning port 26 is parallel to the length direction of the mounting groove 21. One end of the warning port 26 is connected to the placement cavity 24. The warning rod 78 is slidably connected to the inner wall of the warning port 26. One end of the warning rod 78 extends out of the warning port 26. The second rack 79 is engaged with the upper end of the second gear 752. The second rack 79 is fixedly connected to one end of the warning rod 78.

[0047] The implementation principle of an energy-saving certificate printing device in the embodiment of the present application is as follows: the powder storage tank 3 extends into the installation groove 21, the guide surface 711 of the fixing block 71 and the first spring 72 cooperate to realize automatic positioning of the powder storage tank 3, the second spring 74 and the fixing block 71 cooperate to realize fixing of the powder storage tank 3, and the carbon powder in the powder storage tank 3 enters the connecting pipe 61 along the height difference, and the carbon powder pushes the shielding cover 64 to open, connecting the two connecting pipes 61 of the same color powder storage tank 3, and the control valve 63 on the connecting pipe 61 cooperates with the controller and the distance sensor to realize a connection. When the toner in one powder storage tank 3 is used up, the toner in the other powder storage tank 3 is started to be used. When the powder storage tank 3 needs to be disassembled, the unlocking lever 73 is pushed to slide, and the second spring 74 makes the powder storage tank 3 slide out automatically for easy replacement. When the toner in the powder storage tank 3 is not used up, the locking rod 76 locks the fixed block 71, so that the unlocking lever 73 cannot push the fixed block 71 to slide. When the shielding cover 64 rotates, the warning rod 78 is driven to slide through the second gear 752 and the second rack 79, which is convenient for judging the status of the powder storage tank 3.

[0048] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An energy-saving certificate printing device, characterized by: The invention comprises a powder storage box (2), a powder storage tank (3), a powder storage box (4), a connecting pipe (61) and a collecting pipe (62), wherein a mounting groove (21) is provided on one side of the powder storage box (2), the powder storage tank (3) is slidably embedded in the mounting groove (21), a plurality of mounting grooves (21) are provided, and the plurality of mounting grooves (21) are arranged at intervals along the length direction of the powder storage box (2), a plurality of powder storage tanks (3) are provided, and the powder storage tanks (3) and the mounting grooves (21) are arranged one-to-one, the powder storage box (2) is provided with a mounting cavity (22), the powder storage box (4) is arranged in the mounting cavity (22), a connecting port (211) is provided at the bottom of the mounting groove (21), an opening of the powder storage tank (3) is connected to the connecting port (211), one end of the connecting pipe (61) is connected to the connecting port (211), the other end of the connecting pipe (61) is connected to the collecting pipe (62), and the collecting pipe (62) is connected to the powder storage box (4).

2. The energy-saving certificate printing device according to claim 1, characterized in that: It also includes a control valve (63), which is connected to the inner wall of the connecting pipe (61) and is used to control the opening and closing of the connecting pipe (61).

3. The energy-saving certificate printing device according to claim 1, characterized in that: The shielding cover (64) is further included. The shielding cover (64) is hinged to the inner wall of the connecting pipe (61). The hinge axis of the shielding cover (64) and the inner wall of the connecting pipe (61) is horizontal. The hinge end of the shielding cover (64) abuts against the downward inner wall of the connecting pipe (61). The shielding cover (64) is used to cover the opening of the powder storage tank (3).

4. The energy-saving certificate printing device according to claim 3, characterized in that: The invention also includes a fixing block (71), the groove wall of the installation groove (21) is provided with a fixing groove (212), the fixing block (71) is slidably connected to the groove wall of the fixing groove (212), the outer wall of the powder storage tank (3) is provided with a card slot (31), and the fixing block (71) is used to be embedded in the card slot (31).

5. The energy-saving certificate printing device according to claim 4, characterized in that: The mounting plate further comprises a first spring (72), one end of the first spring (72) being fixedly connected to the bottom of the fixing groove (212), and the other end of the first spring (72) being fixedly connected to the fixing block (71), and an end of the fixing block (71) facing away from the bottom of the mounting groove (21) being provided with a guide surface (711), and a distance from the guide surface (711) to the bottom of the mounting groove (21) decreasing as the distance away from the first spring (72) increases.

6. The energy-saving certificate printing device according to claim 5, characterized in that: The powder storage box (2) further comprises an unlocking rod (73), wherein the powder storage box (2) is provided with an unlocking groove (25), wherein the unlocking groove (25) and the mounting groove (21) are provided on the same side of the powder storage box (2), wherein the unlocking groove (25) is connected to the fixing groove (212), wherein the unlocking rod (73) is slidably connected to the groove wall of the unlocking groove (25), wherein one end of the unlocking rod (73) facing away from the fixing block (71) extends out of the unlocking groove (25), wherein one end of the fixing block (71) facing away from the groove bottom of the mounting groove (21) is provided with an abutting groove (712), wherein the abutting groove (712) is provided with an abutting surface (713) facing the groove wall of the mounting groove (21), wherein the distance between the abutting surface (713) and the groove bottom of the mounting groove (21) decreases as the distance from the abutting surface (713) decreases. The unlocking rod (73) abuts against the abutting surface (713).

7. The energy-saving certificate printing device according to claim 6, characterized in that: It also includes a second spring (74), one end of the second spring (74) is connected to the bottom of the mounting groove (21), and the other end of the second spring (74) is connected to the powder storage tank (3).

8. The energy-saving certificate printing device according to claim 6, characterized in that: It also includes a first gear (751), a locking rod (76) and a first rack (77), the hinge shaft of the shielding cover (64) extends out of the connecting tube (61), the first gear (751) is arranged on the outer periphery of the connecting tube (61), the first gear (751) is coaxially fixedly connected to the hinge shaft of the shielding cover (64), the powder storage box (2) is provided with a connecting port (211), the connecting port (211) and the unlocking groove (25) are respectively arranged on both sides of the fixing groove (212), the fixing block (71) is provided with a locking port (714) at one end away from the unlocking rod (73), the connecting port (211) is connected to the locking port (714), the locking rod (76) is slidably connected to the inner wall of the connecting port (211), the locking port (714) is used for the locking rod (76) to extend into, the first rack (77) is engaged with the first gear (751), and the locking rod (76) is fixedly connected to the first rack (77).

9. The energy-saving certificate printing device according to claim 6, characterized in that: The device further comprises a warning rod (78), a second gear (752) and a second rack (79); the powder storage box (2) is provided with a warning opening (26); the length direction of the warning opening (26) is parallel to the length direction of the mounting groove (21); the warning rod (78) is slidably connected to the inner wall of the warning opening (26); one end of the warning rod (78) extends out of the warning opening (26); the hinge shaft of the shielding cover (64) extends out of the connecting pipe (61); the second gear (752) is provided on the outer periphery of the connecting pipe (61); the second gear (752) is coaxially fixedly connected to the hinge shaft of the shielding cover (64); the second rack (79) is meshed with the second gear (752); and the second rack (79) is fixedly connected to the warning rod (78).

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