A printing device with double-head feeding automatic switching function

Abstract

The application relates to the field of 3D printing technology, in particular to a printing device with double-head feeding automatic switching function, which comprises a printer body, a moving mechanism installed on the printer body, a moving plate connected with the moving mechanism, a rotating motor installed on the moving plate and two printing heads arranged on the printer body, and a supporting plate is installed on one side of the printer body; the supporting mechanism is arranged on the supporting plate of the printer body and corresponds to the positions of the two printing heads, meanwhile, a connecting matching piece is arranged at the rotating motor, so that when the moving mechanism places the corresponding printing head at the original position, the connecting matching piece synchronously drives the supporting mechanism, the supporting mechanism stably positions the printing head, the nozzle of the printing head can be cleaned and protected at the same time, the stability during the switching of the printing head is further ensured, and the printing accuracy of the printer body is improved.

Description

Technical Field

[0001] This invention relates to the field of 3D printing technology, specifically to a printing device with automatic switching function for dual-head feeding. Background Technology

[0002] Dual-head automatic feed printers typically have two printheads (or extruders), each capable of receiving printing filament from different feed tubes. During operation, the printer automatically switches between the different printheads according to preset programs and instructions.

[0003] Specifically, when the filament is fed into the left feed tube, the left printhead starts working, extruding the molten filament for printing. Simultaneously, the filament in the right feed tube remains in standby mode, while the right printhead remains inactive. When switching to the right printhead is needed, the system automatically closes the outlet of the left printhead and starts the right printhead, initiating its operation. This switching process is typically achieved through a combination of mechanical structures (such as levers, ejector pins, and elastic elements) and a control system.

[0004] Currently, in existing dual-head automatic switching printers, the two printheads are moved back to their original positions via a moving mechanism, where the printheads are mounted on two support rods. Subsequently, the ejector pins at the moving mechanism disengage from the printheads to clamp the next printhead. However, prolonged use or frequent printhead switching can easily lead to wear on the support rods used to fix the printheads, affecting the stability and accuracy of the printhead's return to its original position, and further impacting the printing precision. Therefore, we propose a printing device with an automatic dual-head feeding switching function. Summary of the Invention

[0005] The purpose of this invention is to provide a printing device with automatic switching function for dual-head feeding, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a printing device with automatic switching function for dual-head feeding, comprising a printer body, a moving mechanism mounted on the printer body, a moving plate connected to the moving mechanism, a rotary motor mounted on the moving plate, and two printheads disposed on the printer body. A support plate is mounted on one side of the printer body, and two support mechanisms are mounted on the support plate, with the two support mechanisms supporting the two printheads respectively.

[0007] The output end of the rotary motor is fixedly mounted with a rotating shaft, and one end of the rotating shaft is equipped with a pin that cooperates with the print head. The rotating shaft is also connected with connecting parts that cooperate with two support mechanisms.

[0008] Furthermore, the connecting component includes a connecting shell, a connecting shaft, a locking component, and a synchronous transmission component. The connecting shell is fixedly mounted on the rotary motor and rotatably sleeved on the outside of the rotary shaft. The connecting shaft passes through one end of the connecting shell, and the end of the connecting shaft located outside the connecting shell is connected to the locking component. The connecting shaft is rotatably connected to the connecting shell. The synchronous transmission component is located inside the connecting shell and is used to synchronously drive the rotary shaft and the connecting shaft. The locking component is alternately connected to two support mechanisms.

[0009] Furthermore, the synchronous transmission component includes a first rotating gear and a second rotating gear. The first rotating gear is fixedly sleeved on the outside of the rotating shaft, and the second rotating gear is fixedly sleeved on the outside of the connecting shaft. The first rotating gear and the second rotating gear are meshed together. The diameter of the first rotating gear is twice that of the second rotating gear, and the number of teeth of the first rotating gear is twice that of the second rotating gear.

[0010] Furthermore, the engaging component includes an engaging block, which is fixedly installed at one end of the connecting shaft located outside the connecting shell, and a square groove is provided on the side of the engaging block away from the connecting shell.

[0011] Furthermore, the support mechanism includes a first support rod, a second support rod, a positioning rotating component, a fixed plate, a synchronous shaft, and a secondary positioning component. One end of the first support rod and the second support rod are respectively fixedly connected to the support plate, and the print head is provided with connection holes at positions corresponding to the first support rod and the second support rod.

[0012] The second support rod has a through hole inside, and the positioning rotating component passes through the through hole. The fixing plate is fixedly installed at the bottom of the support plate, and the synchronous shaft passes through the fixing plate. The synchronous shaft is rotatably connected to the fixing plate. One end of the synchronous shaft is connected to the positioning rotating component, and the other end of the synchronous shaft is connected to the secondary positioning component. It should be noted that the provided support mechanism serves to support the print head.

[0013] Furthermore, the positioning rotating component includes a damping shaft, a mating block, and a rotating component. The damping shaft is rotatably connected to the support plate through a through hole. The mating block is fixedly installed at the end of the damping shaft away from the support plate, and the mating block engages with a square groove. The other end of the damping shaft is connected to the rotating component, which drives the synchronous shaft. It should be noted that the positioning rotating component enables synchronous driving of the synchronous shaft.

[0014] Furthermore, the secondary positioning component includes a rotating disk, a circular plate, a pull shaft, a cleaning and protective component, and a locking component. The rotating disk is fixedly installed at one end of the synchronous shaft, and a rotating groove is provided on the rotating disk. The cleaning and protective component is slidably connected to the rotating groove, and the cleaning and protective component is used to clean and protect the printhead at the bottom of the print head.

[0015] A fixed shaft is fixedly connected to the side of the rotating disk away from the synchronous shaft, and the fixed shaft is fixedly connected to the circular plate. The pulling shaft is fixedly mounted on the circular plate, and the pulling shaft is offset from the center of the circular plate. The pulling shaft is connected to a locking component. A positioning block is provided on the side of the print head near the locking component, and the positioning block is provided with a positioning groove. Further explanation: In this invention, the secondary positioning component achieves secondary positioning of the print head.

[0016] Furthermore, the cleaning and protective component includes a roller, a connecting plate, a lifting plate, a cleaning seat, a cleaning sponge, and a guide rod. The roller slides through the rotating groove, and one end of the roller is rotatably connected to the connecting plate. The connecting plate is located outside the rotating disk, and the top of the connecting plate is fixedly connected to the lifting plate. The cleaning seat is fixedly installed on the top of the lifting plate, and the cleaning seat is located directly below the print head. The cleaning sponge is installed inside the cleaning seat.

[0017] Two guide rods are provided, with both ends of each guide rod fixedly connected to a fixing plate, and a lifting plate slidably sleeved on the outside of the two guide rods. Further explanation: In this invention, the included cleaning and protective components achieve a thorough cleaning and protection of the printhead nozzle.

[0018] Furthermore, the locking component includes a synchronous support rod, a swing support rod, a positioning shaft, a swing shaft, and a limiting component. One end of the synchronous support rod is rotatably connected to the pulling shaft, and the other end of the synchronous support rod is fixedly connected to the swing shaft. The swing shaft passes through the swing support rod and is rotatably connected to it. One end of the swing support rod is rotatably connected to the positioning shaft, which is fixedly mounted on a fixed plate. The other end of the swing support rod has a pushing port. The limiting component is mounted on a support plate and connected to the pushing port. Further explanation: In this invention, the locking component effectively locks the printhead.

[0019] Furthermore, the limiting component includes a slide rail, a slider, and a locking rod. The slide rail is fixedly mounted on the support plate, and the slider is slidably sleeved on the outside of the slide rail. The locking rod is fixedly mounted on one side of the slider, and one end of the locking rod has the same shape and size as the positioning groove. A limiting rod is fixedly connected to the side of the slider near the push port, and the limiting rod slides through the push port. To further explain, in this invention, the limiting component achieves the positioning function when the print head is placed.

[0020] This invention has at least the following beneficial effects:

[0021] 1. When this invention is used, a support mechanism is provided on the support plate of the printer body corresponding to the positions of the two printheads. At the same time, a connecting and mating part is provided at the rotary motor. When the moving mechanism places the corresponding printhead in the original position, the connecting and mating part drives the support mechanism synchronously. This allows the support mechanism to stably position the printhead while cleaning and protecting the nozzle of the printhead, further ensuring the stability when switching printheads and thus improving the printing accuracy of the printer body.

[0022] 2. The two support rods in this invention work together with the secondary positioning component to effectively prevent the printhead from becoming unstable due to wear on the support rods caused by frequent printhead switching. The secondary positioning component works in conjunction with the support rods to ensure the stability of the printhead and also enables precise detection of the printhead's position. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a front view schematic diagram of the fixing plate structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the printhead structure of the present invention;

[0026] Figure 4 This is a side view of the printhead structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the support mechanism structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the synchronous shaft structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the snap-fit ​​component structure of the present invention;

[0030] Figure 8 This is a schematic diagram of the swing support structure of the present invention;

[0031] Figure 9 This is a schematic diagram of the locking component structure of the present invention;

[0032] Figure 10 This is a schematic diagram of the limiting component structure of the present invention;

[0033] Figure 11 This is a schematic diagram of the rotating disk structure of the present invention;

[0034] Figure 12 This is a schematic diagram of the locking rod structure of the present invention.

[0035] In the diagram: 1-Printer body; 2-Moving mechanism; 21-Moving plate; 22-Rotary motor; 3-Print head; 31-Connecting hole; 32-Positioning block; 321-Positioning groove; 4-Support plate; 5-Support mechanism; 51-First support rod; 52-Second support rod; 53-Positioning rotating component; 531-Damping shaft; 532-Matching block; 54-Fixing plate; 55-Synchronous shaft; 56-Secondary positioning component; 561-Rotating disk; 5611-Rotating groove; 562-Circular plate; 563-Pull shaft; 57-Cleaning protective component; 571-Roller; 572-Connecting plate; 573-Lifting plate; 574-Cleaning seat; 575-Cleaning sponge; 576-Guide rod ; 6-Rotating shaft; 61-Ejector pin; 7-Connecting mating part; 71-Connecting shell; 72-Connecting shaft; 73-Snap-fitting part; 731-Snap-fitting block; 7311-Square groove; 74-Synchronous transmission part; 741-First rotating gear; 742-Second rotating gear; 8-Rotating part; 81-First synchronous gear; 82-Second synchronous gear; 83-Gear chain; 9-Locking part; 91-Synchronous support rod; 92-Swing support rod; 921-Push port; 93-Positioning shaft; 94-Swing shaft; 95-Limiting part; 951-Slide rail; 952-Slider; 953-Locking rod; 9531-Insert rod; 9532-Rubber block; 9533-Sliding sleeve; 954-Limiting rod. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1

[0038] Please see Figures 1 to 4A printing device with automatic switching function for dual-head feeding includes a printer body 1, a moving mechanism 2 mounted on the printer body 1, a moving plate 21 connected to the moving mechanism 2, a rotary motor 22 mounted on the moving plate 21, and two printheads 3 disposed on the printer body 1. A support plate 4 is mounted on one side of the printer body 1, and two support mechanisms 5 are mounted on the support plate 4, which respectively support the two printheads 3. It should be noted that the moving mechanism 2 is an existing moving mechanism 2, and in this embodiment, the moving mechanism is preferably composed of a lead screw and a motor, and is configured to cooperate in the X-axis, Y-axis, and Z-axis directions, enabling the moving plate 21 to move precisely along the inside of the printer body 1 in the X-axis, Y-axis, and Z-axis directions. In the prior art, the moving plate 21 is also provided with a telescopic cylinder, which is used to adjust the height of the rotary motor 22 in the Z-axis direction.

[0039] Please see Figure 5 A rotating shaft 6 is fixedly installed at the output end of the rotary motor 22, and a pin 61 that cooperates with the print head 3 is installed at one end of the rotating shaft 6. In this invention, both print heads 3 have a slot on the side near the rotating shaft 6. When the print heads 3 are connected, the rotating shaft 6 drives the pin 61 to insert into the slot. Then, the rotating shaft 6 drives the pin 61 to rotate 90°, and the pin 61 is locked in the slot. At this time, the pin 61 locks the print head 3. The pin 61 drives the print head 3 to cooperate with the moving mechanism 2 inside the printer body 1, so that the print head 3 moves to the corresponding printing position to realize printing. After one printing step is completed, the print head 3 is returned to its original position, and the pin 61 clamps the next print head 3. The rotating shaft 6 is also connected to a connecting fitting 7 that cooperates with the two support mechanisms 5.

[0040] Please see Figures 5 to 7 The connecting component 7 includes a connecting shell 71, a connecting shaft 72, a locking component 73, and a synchronous transmission component 74. The connecting shell 71 is fixedly mounted on the rotary motor 22 and is rotatably sleeved on the outside of the rotary shaft 6. The connecting shaft 72 passes through one end of the connecting shell 71, and the end of the connecting shaft 72 located on the outside of the connecting shell 71 is connected to the locking component 73. The connecting shaft 72 is rotatably connected to the connecting shell 71. The synchronous transmission component 74 is located inside the connecting shell 71 and is used to synchronously drive the rotary shaft 6 and the connecting shaft 72. The locking component 73 is alternately connected to two support mechanisms 5.

[0041] The synchronous transmission component 74 includes a first rotating gear 741 and a second rotating gear 742. The first rotating gear 741 is fixedly sleeved on the outside of the rotating shaft 6, and the second rotating gear 742 is fixedly sleeved on the outside of the connecting shaft 72. The first rotating gear 741 and the second rotating gear 742 are meshed together. The diameter of the first rotating gear 741 is twice that of the second rotating gear 742, and the number of teeth of the first rotating gear 741 is twice that of the second rotating gear 742.

[0042] The engaging component 73 includes an engaging block 731, which is fixedly installed on one end of the connecting shaft 72 located outside the connecting housing 71, and the engaging block 731 has a square groove 7311 on the side away from the connecting housing 71.

[0043] Specific implementation process: During the printhead 3 switching process, while the moving mechanism 2 moves the printhead 3 to its original position, the square groove 7311 of the engaging block 731 is simultaneously fitted onto the connecting end of the support mechanism 5 (this connecting end is the engaging block 532 at the support mechanism 5). The rotary motor 22 runs, thereby causing the rotating shaft 6 to rotate. In this embodiment, the output end of the rotary motor 22 rotates 90°, which further causes the rotating shaft 6 to rotate 90°. When the rotating shaft 6 rotates, it drives the first rotating gear 741 to rotate. The second rotating gear 742 is rotated. In this embodiment, the diameter and number of teeth of the first rotating gear 741 are twice that of the second rotating gear 742. Therefore, when the first rotating gear 741 rotates 90° along with the rotating shaft 6, the second rotating gear 742 rotates 180°, thereby driving the connecting end. At the same time, when the rotating shaft 6 rotates 90°, the ejector pin 61 corresponds to the slot of the print head 3. Through the movement of the moving mechanism 2, the ejector pin 61 is simultaneously disengaged from the slot, and the print head 3 is returned to its original position.

[0044] Please see Figures 2 to 4 and Figures 6 to 11 The support mechanism 5 includes a first support rod 51, a second support rod 52, a positioning rotating component 53, a fixing plate 54, a synchronous shaft 55, and a secondary positioning component 56. One end of the first support rod 51 and the second support rod 52 are respectively fixedly connected to the support plate 4, and the print head 3 is provided with a connection hole 31 at the position corresponding to the first support rod 51 and the second support rod 52.

[0045] The second support rod 52 has a through hole inside, and the positioning rotating part 53 passes through the through hole. The fixing plate 54 is fixedly installed at the bottom of the support plate 4, and the synchronous shaft 55 passes through the fixing plate 54. The synchronous shaft 55 is rotatably connected to the fixing plate 54. One end of the synchronous shaft 55 is connected to the positioning rotating part 53, and the other end of the synchronous shaft 55 is connected to the secondary positioning part 56.

[0046] The positioning rotating component 53 includes a damping rotating shaft 531, a mating block 532, and a rotating component 8. The damping rotating shaft 531 is rotatably connected to the support plate 4 through a through hole. In this embodiment, the damping rotating shaft 531 and the second support rod 52 remain relatively fixed when not driven by external force. The mating block 532 is fixedly installed at one end of the damping rotating shaft 531 away from the support plate 4, and the mating block 532 cooperates with the square groove 7311. The other end of the damping rotating shaft 531 is connected to the rotating component 8, and the rotating component 8 is used to drive the synchronous shaft 55.

[0047] Please see Figures 8 to 10 The secondary positioning component 56 includes a rotating disk 561, a circular plate 562, a pull shaft 563, a cleaning and protective component 57, and a locking component 9. The rotating disk 561 is fixedly installed at one end of the synchronous shaft 55, and a rotating groove 5611 is provided on the rotating disk 561. The cleaning and protective component 57 is slidably connected to the rotating groove 5611, and the cleaning and protective component 57 is used to clean and protect the bottom nozzle of the print head 3.

[0048] A fixed shaft is fixedly connected to the side of the rotating disk 561 away from the synchronous shaft 55, and the fixed shaft is fixedly connected to the circular plate 562. The pull shaft 563 is fixedly installed on the circular plate 562, and the pull shaft 563 is offset from the center of the circular plate 562. The pull shaft 563 is connected to the locking member 9. The side of the print head 3 near the locking member 9 is provided with a positioning block 32, and the positioning block 32 is provided with a positioning groove 321.

[0049] The cleaning protective component 57 includes a roller 571, a connecting plate 572, a lifting plate 573, a cleaning seat 574, a cleaning sponge 575, and a guide rod 576. The roller 571 slides through the rotating groove 5611. The shape of the rotating groove 5611 in this embodiment is shown in the reference. Figure 11 This shape setting allows the roller 571 to be at the highest position on the rotating disk 561 after the rotating groove 5611 rotates 180°, and the roller 571 to be at the lowest position on the rotating disk 561 after the rotating disk 561 drives the rotating groove 5611 to rotate 180° again. One end of the roller 571 is rotatably connected to the connecting plate 572, which is located outside the rotating disk 561. The top of the connecting plate 572 is fixedly connected to the lifting plate 573. The cleaning seat 574 is fixedly installed on the top of the lifting plate 573 and is located directly below the print head 3. The cleaning sponge 575 is installed inside the cleaning seat 574. In this invention, the groove at the top of the cleaning seat 574 is cone-shaped, and the cleaning sponge 575 is placed inside the groove. The cleaning sponge 575 can cooperate with the shape of the nozzle at the bottom of the print head 3 to achieve the function of cleaning and wiping the nozzle of the print head 3.

[0050] Two guide rods 576 are provided. The two ends of the two guide rods 576 are fixedly connected to the fixed plate 54 respectively, and the lifting plate 573 is slidably sleeved on the outside of the two guide rods 576.

[0051] The locking component 9 includes a synchronous support rod 91, a swing support rod 92, a positioning shaft 93, a swing shaft 94, and a limiting component 95. One end of the synchronous support rod 91 is rotatably connected to the pulling shaft 563, and the other end of the synchronous support rod 91 is fixedly connected to the swing shaft 94. The swing shaft 94 passes through the swing support rod 92 and is rotatably connected to the swing support rod 92. One end of the swing support rod 92 is rotatably connected to the positioning shaft 93, and the positioning shaft 93 is fixedly installed on the fixing plate 54. The other end of the swing support rod 92 is provided with a push port 921. The limiting component 95 is installed on the support plate 4 and is connected to the push port 921.

[0052] The limiting component 95 includes a slide rail 951, a slider 952, and a locking rod 953. The slide rail 951 is fixedly installed on the support plate 4, and the slider 952 is slidably sleeved on the outside of the slide rail 951. The locking rod 953 is fixedly installed on one side of the slider 952, and one end of the locking rod 953 has the same shape and size as the positioning groove 321. A limiting rod 954 is fixedly connected to the side of the slider 952 near the push port 921, and the limiting rod 954 slides through the push port 921.

[0053] Specific implementation process: When the print head 3 is aligned with the first support rod 51 and the second support rod 52, and respectively fitted onto the outside of the first support rod 51 and the second support rod 52, the locking block 731 is synchronously fitted onto the outside of the square-shaped mating block 532 through the square groove 7311. When the connecting shaft 72 drives the locking block 731 to rotate, the locking block 731 drives the damping shaft 531 to rotate synchronously through the mating block 532. The damping shaft 531 then drives the synchronous shaft 55 to rotate at the same angle relative to the fixed plate 54 through the rotating component 8. The rotation further causes the rotating disk 561 at one end of the synchronous shaft 55 to rotate. As the rotating disk 561 rotates, it drives the roller 571 to move through the rotating groove 5611. Under the limiting action of the connecting plate 572, the lifting plate 573 and the guide rod 576, the roller 571 drives the lifting plate 573 to move upward through the connecting plate 572 until the cleaning sponge 575 rises to the bottom of the print head 3 and protects the print head. In this state, the synchronous shaft 55 rotates 180°.

[0054] As the rotating disk 561 rotates, it drives the circular plate 562 to rotate synchronously. The pulling shaft 563 at the disk drives the synchronous support rod 91 to move. As the synchronous support rod 91 moves, it drives the swing support rod 92 to move. Under the limiting action of the positioning shaft 93, the swing support rod 92 rotates around the positioning shaft 93. As the swing support rod 92 rotates, it pushes the limiting rod 954 to move through the pushing port 921. Under the limiting action of the slider 952 and the slide rail 951, the locking rod 953 is inserted into the positioning block 32 of the print head 3, realizing the secondary positioning of the print head 3.

[0055] In this embodiment, when the rotating shaft 6 rotates 90°, the cleaning sponge 575 protects the nozzle of the print head 3, and the locking rod 953 performs secondary positioning of the print head 3. Then, the ejector pin 61 of the rotating shaft 6 disengages from the print head 3 and clamps the next print head 3.

[0056] Example 2

[0057] Please see Figure 7 Example 2 further explains the rotating component 8 in Example 1. Specifically, the rotating component 8 includes a first synchronous gear 81, a second synchronous gear 82, and a gear chain 83. The first synchronous gear 81 is fixedly installed at one end of the damping shaft 531, and the second synchronous gear 82 is fixedly installed at one end of the synchronous shaft 55. The gear chain 83 is connected to the outside between the first synchronous gear 81 and the second synchronous gear 82, and the first synchronous gear 81 and the second synchronous gear 82 are of the same model and size.

[0058] Specifically, when the damping shaft 531 rotates, the damping shaft 531 drives the second synchronous gear 82 to rotate synchronously through the first synchronous gear 81 and the gear chain 83, thereby causing the synchronous shaft 55 to rotate synchronously with the damping shaft 531, and the rotation angle is the same.

[0059] Example 3

[0060] Please see Figure 12 Example 3 further explains the locking rod 953 in Example 1. Specifically, the locking rod 953 includes an insertion rod 9531, a rubber block 9532, and a sliding sleeve 9533. The sliding sleeve 9533 is fixedly installed on the slider 952, and the rubber block 9532 is located inside the sliding sleeve 9533. One end of the rubber block 9532 is fixedly connected to the inside of the sliding sleeve 9533, and the other end of the rubber block 9532 is fixedly connected to the insertion rod 9531. One end of the insertion rod 9531 passes through the sliding sleeve 9533 and engages with the positioning groove 321.

[0061] In this embodiment, while the slider 952 moves along the direction of the print head 3, it simultaneously drives the insertion rod 9531 to move along the positioning block 32 until one end of the insertion rod 9531 is stably inserted into the positioning groove 321. At the same time, under the connecting action of the rubber block 9532, it is ensured that the insertion rod 9531 can be buffered and protected while being inserted into the positioning groove 321, further ensuring that the insertion rod 9531 can be stably inserted into the positioning groove 321.

[0062] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0063] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A printing device with double-head feeding automatic switching function, comprising a printer body (1), a moving mechanism (2) installed on the printer body (1), a moving plate (21) connected with the moving mechanism (2), a rotary motor (22) installed on the moving plate (21), and two printing heads (3) arranged on the printer body (1), characterized in that: One side of the printer body (1) is provided with a support plate (4), two support mechanisms (5) are installed on the support plate (4), and the two support mechanisms (5) support the two printheads (3) respectively; The output end of the rotating motor (22) is fixedly provided with a rotating shaft (6), one end of the rotating shaft (6) is provided with a thimble (61) matched with the printhead (3), and the rotating shaft (6) is further connected with a connecting matching part (7) matched with the two support mechanisms (5); the connecting matching part (7) comprises a connecting shell (71), a connecting shaft (72), a clamping part (73) and a synchronous transmission part (74), the connecting shell (71) is fixedly installed on the rotating motor (22), the connecting shell (71) is rotatably sleeved outside the rotating shaft (6), one end of the connecting shaft (72) penetrates through the connecting shell (71), one end of the connecting shaft (72) located outside the connecting shell (71) is connected with the clamping part (73), the connecting shaft (72) is rotatably connected with the connecting shell (71), the synchronous transmission part (74) is located inside the connecting shell (71), and the synchronous transmission part (74) is used for synchronously driving the rotating shaft (6) and the connecting shaft (72), and the clamping part (73) is alternately connected with the two support mechanisms (5); The support mechanism (5) comprises a first support rod (51), a second support rod (52), a positioning rotating part (53), a fixed plate (54), a synchronous shaft (55) and a secondary positioning part (56), one end of the first support rod (51) and the second support rod (52) is fixedly connected with the support plate (4) respectively, and the position of the printhead (3) corresponding to the first support rod (51) and the second support rod (52) is provided with a connecting hole (31); The second support rod (52) is provided with a through hole, and the positioning rotating part (53) penetrates through the through hole, the fixed plate (54) is fixedly installed at the bottom of the support plate (4), the synchronous shaft (55) penetrates through the fixed plate (54), the synchronous shaft (55) is rotatably connected with the fixed plate (54), one end of the synchronous shaft (55) is connected with the positioning rotating part (53), and the other end of the synchronous shaft (55) is connected with the secondary positioning part (56); The secondary positioning part (56) comprises a rotating disc (561), a circular plate (562), a pulling shaft (563), a cleaning protection part (57) and a locking part (9), the rotating disc (561) is fixedly installed at one end of the synchronous shaft (55), the rotating disc (561) is provided with the rotating groove (5611), the cleaning protection part (57) is slidably connected with the rotating groove (5611), and the cleaning protection part (57) is used for cleaning and protecting the nozzle at the bottom of the printhead (3).

2. The printing device with double-head feeding automatic switching function according to claim 1, characterized in that: The synchronous transmission part (74) comprises a first rotating gear (741) and a second rotating gear (742), the first rotating gear (741) is fixedly sleeved outside the rotating shaft (6), the second rotating gear (742) is fixedly sleeved outside the connecting shaft (72), the first rotating gear (741) and the second rotating gear (742) are in meshing connection, the diameter of the first rotating gear (741) is twice that of the second rotating gear (742), and the number of teeth of the first rotating gear (741) is twice that of the second rotating gear (742).

3. The printing device with double-head feeding automatic switching function according to claim 1, characterized in that: The clamping part (73) comprises a clamping block (731), the clamping block (731) is fixedly installed at one end of the connecting shaft (72) outside the connecting shell (71), and a square groove (7311) is arranged on the side of the clamping block (731) away from the connecting shell (71).

4. The printing device with double-head feeding automatic switching function according to claim 3, characterized in that: The positioning rotating part (53) comprises a damping rotating shaft (531), a matching block (532) and a rotating part (8), the damping rotating shaft (531) is rotationally connected with the support plate (4) through the through hole, the matching block (532) is fixedly installed at one end of the damping rotating shaft (531) away from the support plate (4), the matching block (532) is matched with the square groove (7311), the other end of the damping rotating shaft (531) is connected with the rotating part (8), and the rotating part (8) is used for driving the synchronous shaft (55).

5. The printing device with double-head feeding automatic switching function according to claim 1, wherein: A fixed shaft is fixedly connected to the side of the rotating disc (561) away from the synchronous shaft (55), the fixed shaft is fixedly connected with the circular plate (562), the pulling shaft (563) is fixedly installed on the circular plate (562), the pulling shaft (563) is offset from the center of the circular plate (562), the pulling shaft (563) is connected with the locking part (9), the printing head (3) is provided with a positioning block (32) on the side close to the locking part (9), and the positioning block (32) is provided with a positioning groove (321).

6. The printing apparatus having a dual head feed automatic switching function according to claim 5, characterized in that: The cleaning protection part (57) comprises a roller (571), a connecting plate (572), a lifting plate (573), a cleaning seat (574), a cleaning sponge (575) and a guide rod (576), the roller (571) slides through the rotating groove (5611), one end of the roller (571) is rotationally connected with the connecting plate (572), the connecting plate (572) is located outside the rotating disc (561), the top of the connecting plate (572) is fixedly connected with the lifting plate (573), the cleaning seat (574) is fixedly installed on the top of the lifting plate (573), the cleaning seat (574) is located directly below the printing head (3), and the cleaning sponge (575) is installed in the cleaning seat (574). The guide rods (576) are provided with two, two ends of the guide rods (576) are fixedly connected with the fixed plate (54), and the lifting plate (573) is slidingly sleeved outside the two guide rods (576).

7. The printing device with double-head feeding automatic switching function according to claim 5, characterized in that: The locking piece (9) comprises a synchronous support rod (91), a swing support rod (92), a positioning shaft (93), a swing shaft (94) and a limiting piece (95), one end of the synchronous support rod (91) is rotatably connected with the pulling shaft (563), the other end of the synchronous support rod (91) is fixedly connected with the swing shaft (94), the swing shaft (94) penetrates the swing support rod (92), and the swing shaft (94) is rotatably connected with the swing support rod (92), one end of the swing support rod (92) is rotatably connected with the positioning shaft (93), the positioning shaft (93) is fixedly installed on the fixed plate (54), the other end of the swing support rod (92) is provided with a pushing port (921), the limiting piece (95) is installed on the support plate (4), and the limiting piece (95) is connected with the pushing port (921).

8. The printing device with double-head feeding automatic switching function according to claim 7, characterized in that: The limiting piece (95) comprises a sliding rail (951), a sliding block (952) and a locking rod (953), the sliding rail (951) is fixedly installed on the support plate (4), the sliding block (952) is slidingly sleeved outside the sliding rail (951), the locking rod (953) is fixedly installed on one side of the sliding block (952), one end of the locking rod (953) is the same in shape and size as the positioning groove (321), one side of the sliding block (952) close to the pushing port (921) is fixedly connected with a limiting rod (954), and the limiting rod (954) slidingly penetrates the pushing port (921).

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