Small ink-jet color printer

Abstract

A small ink-jet color printer disclosed by the present invention comprises a printer body and a base, the printer body is composed of a housing, a printing unit, a paper roll unit and a paper feeding unit, the base is provided with an embedding groove, the bottom end of the housing is vertically inserted in the embedding groove, and the bottom end of the base is provided with a plurality of adsorption assemblies. The adsorption assembly is composed of a stud, a suction cup and a nut, the stud is arranged at the bottom end of the base, the suction cup is arranged at the bottom end of the stud, and the guide plate is arranged on the base and arranged at a paper outlet of a printer body, so that after thermal paper is printed, the thermal paper is guided through the obliquely-upward guiding effect of the guide plate, and then the thermal paper is adsorbed. The guide plate can effectively prevent thermo-sensitive paper from curling at the paper outlet, so that the thermo-sensitive paper can be conveniently torn after printing is completed, through cooperation of the lug block, the connecting shaft and the straight notch, the rotatable folding effect of the guide plate is achieved, use in the printing process is facilitated, retraction in the placing process is facilitated, and the insertion groove ensures that in the use process of the guide plate, the guide plate is not prone to breakage. And the stability effect of inclined arrangement is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of printers, and in particular to a small inkjet color printer. Background Art

[0002] A thermal printer is a device that prints on thermal paper. Its operating principle is that a semiconductor heating element is installed in the print head. Once the print head heats up and contacts the thermal paper, the desired pattern is printed, similar to a thermal fax machine. The image is created by heating the film, which triggers a chemical reaction. This chemical reaction in thermal printers occurs at a specific temperature, which is accelerated by high temperatures. At temperatures below 60°C, the paper takes a considerable amount of time, even years, to turn dark. However, at 200°C, the reaction is complete within microseconds.

[0003] When using existing printers, due to their small size and light weight, they cannot be fixed to the table on which they are placed. When tearing off the printed thermal paper, it is necessary to manually press the printer to prevent the printer from moving, which is inconvenient to operate. In addition, the thermal paper is affected by its original curl and remains curled downward after printing, which is not conducive to tearing off after printing. Therefore, a small inkjet color printer is needed to meet the needs. Summary of the Invention

[0004] The object of the present invention is to provide a small inkjet color printer to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A small inkjet color printer comprises a printer body and a base, the printer body comprising a housing, a printing unit, a paper roll unit, and a paper feed unit, the base having an embedding groove, the bottom end of the housing being vertically inserted into the embedding groove, the bottom end of the base being provided with a plurality of adsorption components, the adsorption components comprising a stud, a suction cup, and a nut, the stud being provided at the bottom end of the base, the suction cup being provided at the bottom end of the stud, and the nut being threadedly connected to the stud, a guide component being provided on the outer side of the base near the paper outlet of the printer body, the guide component comprising two lugs, a connecting shaft, a guide plate, a straight slot, and a slot, the two lugs being symmetrically connected to the base, the connecting shaft being connected between the two lugs, the guide plate extending outward from the base and being arranged on the connecting shaft in an inclined manner from bottom to top, the straight slot being provided through both sides of the guide plate, the connecting shaft being arranged in the straight slot, the slot being provided on the outer side of the base, and one side of the guide plate being inserted into the slot.

[0006] Preferably, the shell consists of an integrated shell and a detachable shell, the detachable shell is located at the bottom and corresponds to the position of the paper roll unit, the detachable shell and the integrated shell are connected by a pin and a slot, a flip cover is rotatably connected to the top of the integrated shell through a rotating shaft, the position of the flip cover corresponds to the position of the printing unit, two screws are threadedly connected on the inner side of the flip cover away from the hinge, two magnets are embedded in the top of the integrated shell, the positions of the two magnets correspond to the positions of the two screws respectively, and a hand buckle slot is provided on the side of the flip cover away from the hinge.

[0007] Preferably, a perspective window is provided on the flip cover, and the perspective window is tightly plugged into the flip cover via an insertion shaft.

[0008] Preferably, a raised rib is provided on the inner side of the flip cover near the hinge, and a micro switch is provided on the integrated housing. The micro switch corresponds to the position of the raised rib, and the micro switch can be electrically connected to an alarm device added inside the printer body.

[0009] Preferably, two plug-in assemblies are provided on the bottom ends of the integrated shell and the detachable shell, and the plug-in assembly consists of a first plug rod, a second plug rod, a first plug block and a second plug block. The first plug rod is connected to the bottom ends of the integrated shell and the detachable shell, the second plug rod is connected to the bottom end of the first plug rod, and its outer diameter is smaller than the outer diameter of the first plug rod. The first plug block is connected to the bottom end of the second plug rod in a cone shape, and its outer diameter gradually increases from bottom to top. The second plug block is connected to the outer wall of the second plug rod in a cone shape and its outer diameter gradually decreases from bottom to top, and the groove is embedded. A plurality of sockets are provided on the top, each socket corresponding to the position of the first plug block, two guide grooves are provided in the side wall of each socket, a first spring is provided in each guide groove, a latch is provided on each first spring, and the latch is arranged between the upper end of the first plug block and the lower end of the second plug block. The side of the latch close to the embedding groove is inclined, and the side away from the embedding groove is flat. The maximum outer diameter of the first plug block is smaller than the maximum outer diameter of the second plug block. A ring is provided on the end of the second plug block close to the first plug block, and the inner diameter of the ring is the same as the maximum outer diameter of the first plug block.

[0010] Preferably, a circular spring groove is provided on the embedding groove, and a plurality of second springs arranged evenly in a circumference are provided in the spring groove. The plurality of second springs are connected to the same pad, which is arranged below the printer body and contacts the bottom end of the printer body.

[0011] The beneficial effects of the present invention are: The present invention provides a guide plate on the base and arranges it at the paper outlet of the printer body, so that after printing, the thermal paper can be guided upward by the guide plate, which can effectively prevent the thermal paper from curling at the paper outlet, thereby facilitating the tearing of the thermal paper after printing. In addition, the guide plate can be rotatably folded by cooperating with the ear block, the connecting shaft and the straight slot, which is convenient for use during printing and for retraction when placed. The slot ensures the stability of the inclined arrangement of the guide plate during use.

[0012] The present invention provides an adsorption component at the bottom end of the base, utilizes the adsorption effect of multiple suction cups to fix the base on the table surface, and utilizes the screwing effect of the nut on the stud to provide pressure on the suction cup, thereby preventing the suction cup from recovering, improving the adsorption effect, and the fixing effect of the base. In addition, the provision of the embedding groove facilitates the embedded installation of the printer body, thereby improving the connection effect between the printer body and the base, and further achieving the fixing effect of the printer body, effectively avoiding the pressing operation of the thermal paper on the printer body when tearing. The structure is simple and the practical effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the connection structure between the printer body and the base of a small inkjet color printer proposed by the present invention; Figure 2 This is a schematic diagram of the external structure of a small inkjet color printer proposed by the present invention; Figure 3 A schematic diagram of the internal structure of a small inkjet color printer proposed by the present invention; Figure 4 This is a schematic structural diagram of a detachable housing and paper roll unit of a small inkjet color printer proposed by the present invention; Figure 5 This is a schematic diagram of the structure of the flip cover and printing unit of a small inkjet color printer proposed by the present invention; Figure 6 This is a schematic diagram of the flip cover and perspective window structure of a small inkjet color printer proposed by the present invention; Figure 7 This is a schematic diagram of the top view of the guide assembly of a small inkjet color printer proposed by the present invention; Figure 8 This is a schematic diagram of the front cross-sectional structure of a base of a small inkjet color printer proposed by the present invention; Figure 9 This is a schematic side cross-sectional structural diagram of an adsorption component of a small inkjet color printer proposed by the present invention; Figure 10 A small inkjet color printer proposed by the present invention Figure 9Enlarged structural diagram at point A in the middle.

[0014] In the figure: 1, printer body; 11, housing; 12, printing unit; 13, paper roll unit; 14, paper feed unit; 111. Integrated housing; 112. Removable housing; 113. Rotating shaft; 114. Flip cover; 115. Screw; 116. Magnet; 117. Handle slot; 118. Perspective window; 119. Raised rib; 1110. Micro switch; 2. Base; 21. Embossed groove; 22. Insert hole; 23. Guide groove; 24. First spring; 25. Latch; 26. Spring groove; 27. Second spring; 28. Pad; 3. Adsorption assembly; 31. Stud; 32. Suction cup; 33. Nut; 4. Guide assembly; 41. Ear block; 42. Connecting shaft; 43. Guide plate; 44. Straight notch; 45. Slot; 5. Plug-in assembly; 51. First plug rod; 52. Second plug rod; 53. First plug block; 54. Second plug block; 55. Ring. DETAILED DESCRIPTION

[0015] 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.

[0016] Reference Figure 1-10 A small inkjet color printer includes a printer body 1 and a base 2. The printer body 1 consists of a housing 11, a printing unit 12, a paper roll unit 13, and a paper feed unit 14. The base 2 is provided with a groove 21. The bottom end of the housing 11 is vertically inserted into the groove 21. The bottom end of the base 2 is provided with a plurality of adsorption components 3. The adsorption components 3 consist of a stud 31, a suction cup 32, and a nut 33. The stud 31 is provided on the bottom end of the base 2, the suction cup 32 is provided on the bottom end of the stud 31, and the nut 33 is threadedly connected to the stud 31. The base 2 is close to the printer. A guide assembly 4 is provided on the outside of one side of the paper outlet of the machine body 1. The guide assembly 4 consists of two ear blocks 41, a connecting shaft 42, a guide plate 43, a straight slot 44 and a slot 45. The two ear blocks 41 are symmetrically connected to the base 2, and the connecting shaft 42 is connected between the two ear blocks 41. The guide plate 43 extends outward from the base 2 and is arranged on the connecting shaft 42 in an inclined shape from bottom to top. The straight slot 44 is opened on both sides of the guide plate 43, and the connecting shaft 42 is arranged in the straight slot 44. The slot 45 is opened on the outside of the base 2, and one side of the guide plate 43 is inserted into the slot 45.

[0017] Before using the printer body 1, the base 2 is placed at the desired placement position of the printer body 1. Since the adsorption component 3 is arranged at the lower end of the base 2, the suction cup 32 contacts the placement table, and the base 2 is pressed downward. The base 2 drives the stud 31 to press down, so that the gap between the suction cup 32 and the table is reduced, and the suction cup 32 is adsorbed on the table. The nut 33 is screwed clockwise. The nut 33 tends to descend on the stud 31. After the bottom end of the nut 33 contacts the top end of the suction cup 32, the nut 33 is continuously screwed, so that the nut 33 has a pressing effect on the suction cup 32, thereby effectively preventing the suction cup 32 from rebounding and improving the adsorption effect of the suction cup 32 on the table. From then on, the base 2 is fixed to the table. After the base 2 is fixed, the bottom of the printer body 1 is placed into the groove 21, and one end of the paper outlet is directed toward the position of the guide assembly 4, so that a wrapping tendency is formed between the bottom of the printer body 1 and the base 2. This can effectively limit the lateral movement of the printer body 1, preventing the thermal paper from moving the printer body 1 laterally during the tearing process, and at the same time, forming a fixed effect on the printer body 1, preventing the printer body 1 from being pressed. In the original state, the guide plate 43 is in a vertical state, with the end away from the connecting shaft 42 at the lower end and the end close to the connecting shaft 42 at the upper end. Before printing, the guide plate 43 is rotated. Since the connecting shaft 42 is connected by the two ear blocks 41, the guide plate 43 drives the straight slot 44 to rotate on the connecting shaft 42. The end of the guide plate 43 away from the connecting shaft 42 rotates upward, and the guide plate 43 gradually forms an upward tilt trend. When the tilt degree of the guide plate 43 is close to the tilt degree of the slot 45, the guide plate 43 is pushed into the slot 45. The straight slot 44 ensures the smooth movement of the guide plate 43. When the end of the guide plate 43 close to the connecting shaft 42 is inserted into the slot 45, the slot 45 limits the rotation of the guide plate 43 on the connecting shaft 42, thereby achieving the stability of the inclined arrangement of the guide plate 43. When the thermal paper is subsequently extended from the paper outlet of the printer body 1, it is guided by the upwardly inclined guide plate 43, so that the curled thermal paper can be moved upwardly, avoiding the curling causing the paper outlet to be blocked, thereby facilitating the tearing of the thermal paper after printing.

[0018] Specifically, in this embodiment, the shell 11 is composed of an integrated shell 111 and a detachable shell 112. The detachable shell 112 is located at the bottom and corresponds to the position of the paper roll unit 13. The detachable shell 112 is connected to the integrated shell 111 through a pin and a slot. A flip cover 114 is rotatably connected to the top of the integrated shell 111 through a rotating shaft 113. The position of the flip cover 114 corresponds to the position of the printing unit 12. Two screws 115 are threadedly connected to the inner side of the flip cover 114 away from the hinge. Two magnets 116 are embedded in the top of the integrated shell 111. The positions of the two magnets 116 respectively correspond to the positions of the two screws 115. A hand buckle groove 117 is provided on the side of the flip cover 114 away from the hinge.

[0019] The detachable effect of the detachable shell 112 facilitates the replacement of the paper roll in the paper roll unit 13, and the rotatable effect of the flip cover 114 facilitates the addition and replacement of ink in the ink cartridge in the printable unit 12. The adsorption effect between the screw 115 and the magnet 116 ensures the firmness of the flip cover 114 after it is closed. The simple structure makes operation convenient, and the hand buckle slot 117 facilitates the opening and closing of the flip cover 114.

[0020] Specifically, in this embodiment, a perspective window 118 is provided on the flip cover 114 , and the perspective window 118 is tightly plugged into the flip cover 114 via an insertion shaft. The perspective effect of the perspective window 118 allows the printing working status to be observed without opening the flip cover 114 .

[0021] Specifically, in this embodiment, a raised rib 119 is provided on the inner side of the flip cover 114 near the hinge, and a micro switch 1110 is provided on the integrated shell 111. The micro switch 1110 corresponds to the position of the raised rib 119, and the micro switch 1110 can be electrically connected to the alarm device added inside the printer body 1.

[0022] The cooperation between the micro switch 1110 and the raised rib 119 realizes the detection of whether the flip cover 114 is closed or closed in place. If the flip cover 114 is not closed or closed in place, the raised rib 119 does not contact the micro switch 1110 or the closing condition of the micro switch 1110 is not met, thereby causing the micro switch 1110 to send an electrical signal to the alarm device, triggering an alarm warning.

[0023] Specifically, in this embodiment, two plug-in components 5 are provided on the bottom ends of the integrated shell 111 and the detachable shell 112. The plug-in component 5 consists of a first plug rod 51, a second plug rod 52, a first plug block 53 and a second plug block 54. The first plug rod 51 is connected to the bottom ends of the integrated shell 111 and the detachable shell 112, and the second plug rod 52 is connected to the bottom end of the first plug rod 51, and its outer diameter is smaller than the outer diameter of the first plug rod 51. The first plug block 53 is connected to the bottom end of the second plug rod 52 in a conical shape, and its outer diameter gradually increases from bottom to top. The second plug block 54 is connected to the outer wall of the second plug rod 52 in a conical shape and its outer diameter gradually decreases from bottom to top. A plurality of sockets 22 are provided on the top, each socket 22 corresponds to the position of the first plug block 53, and two guide grooves 23 are provided in the side wall of each socket 22. A first spring 24 is provided in each guide groove 23, and a latch 25 is provided on each first spring 24. The latch 25 is arranged between the upper end of the first plug block 53 and the lower end of the second plug block 54. The side of the latch 25 close to the embedding groove 21 is inclined, and the side away from the embedding groove 21 is flat. The maximum outer diameter of the first plug block 53 is smaller than the maximum outer diameter of the second plug block 54. A ring 55 is provided on the end of the second plug block 54 close to the first plug block 53, and the inner diameter of the ring 55 is the same as the maximum outer diameter of the first plug block 53.

[0024] When the printer body 1 is inserted into the embedding groove 21 of the base 2 for installation, the plug-in assembly 5 located at the bottom of the integrated shell 111 and the detachable shell 112 is automatically aligned with the socket 22, and the first plug rod 51, the second plug rod 52, the first plug block 53 and the second plug block 54 are synchronously moved from top to bottom into the socket 22. The first plug block 53 at the bottom first contacts the plug pin 25 located in the socket 22. The tapered outer wall of the first plug block 53 and the upper inclined surface of the plug pin 25 cooperate to make the plug pin 25 move into the guide groove 23. The first spring 24 is gradually compressed by the movement of the plug pin 25. When the first plug block 53 moves from the upper part to the lower part of the plug pin 25, the tip of the inclined surface end of the plug pin 25 contacts the guide groove 23. The collar 55 at the bottom end of the second plug 54 contacts the collar 55. Since the inner diameter of the collar 55 is the same as the outer diameter of the first plug 53, the tip of the latch 25 forms a support effect on the collar 55, so that the latch 25 pushes the second plug 54 upward, and the second plug 54 and the first plug 53 tend to separate. At this time, the tip of the latch 25 loses its restraint, the first spring 24 rebounds, and the latch 25 extends from the guide groove 23. The latch 25 is located between the first plug 53 and the second plug 54. The flat end of the latch 25 abuts against the flat end of the first plug 53 with a larger outer diameter, thereby effectively preventing the first plug 53 from separating from the socket 22 from the bottom up, further improving the connection between the printer body 1 and the base 2. When it is necessary to open the detachable shell 112 to replace the paper roll, the printer body 1 is pressed downward to move the plug assembly 5 downward as a whole. At this time, the latch 25 and the ring 55 located between the first plug block 53 and the second plug block 54 are in contact. The downward movement of the plug assembly 5 causes the second plug block 54 to move upward on the second plug rod 52. Since the outer diameter of the second plug rod 52 is smaller than the first plug rod 51, when the second plug block 54 contacts the first plug rod 51, the upward movement of the second plug block 54 is restricted. The overall downward movement of the plug assembly 5 and the cooperation of the upper inclined surface of the latch 25 cause the latch 25 to form a contraction trend. The first spring 24 is compressed. When the second plug block 53 moves from the upper part of the latch 25 to the lower part, the tip of the latch 25 loses its restriction, the first spring 24 rebounds, and the latch 25 extends. At this time, the printer body 1 is pulled upward. Since the vertical position of the latch 25 is relatively fixed, the printer body 1 drives the plug assembly 5 to move upward, and the second plug block 54 Under the effects of gravity and the shielding effect of the extended latch 25, the second plug rod 52 slides up and down, tending to merge with the first plug block 53. The collar 55 is sleeved on the maximum outer diameter of the first plug block 54. When the tip of the lower part of the latch 25 first contacts the second plug block 54, the tapered outer wall of the second plug block 54 causes the latch 25 to gradually retract into the guide groove 23 until the second plug block 54 moves upward, the first plug block 53 and the latch 25 are aligned in height, and the latch 25 gradually extends over the tapered outer wall of the first plug block 53. At this time, the second plug block 54 and the first plug block 53 have completely moved from the lower end of the latch 25 to the upper end, thereby achieving the separation of the plug assembly 5 from the receptacle 22 and the separation of the printer body 1 and the base 2. The cooperation between the plug assembly 5 and the base 2 further improves the connection between the printer body 1 and the base 2, while facilitating the installation and removal of the printer body 1 and the base 2 and facilitating the replacement of the paper roll.

[0025] Specifically, in this embodiment, a circular spring groove 26 is formed on the embedding groove 21, and a plurality of second springs 27 are arranged evenly in a circumferential shape in the spring groove 26. The plurality of second springs 27 are connected to a same backing plate 28. The backing plate 28 is arranged below the printer body 1 and contacts the bottom end of the printer body 1. When the printer body 1 is installed in the base 2, the downward pressure of the printer body 1 is transmitted to the second springs 27 via the backing plate 28, causing the second springs 27 to compress and generate a reaction force, so that the printer body 1 always tends to separate from the base 2, providing support for the printer body 1. At the same time, the tendency of separation acts on the second springs 27. On an insert block 53 and the latch 25, the first insert block 53 in this state has an upward movement tendency, so that a mutual force is generated between the flat end of the largest outer diameter of the first insert block 53 and the flat end of the latch 25, thereby improving the locking effect of the latch 25 on the upward movement of the first insert block 53. The spring groove 26 provides sufficient space for the compression of the second spring 27, and at the same time provides sufficient space for the plug-in component 5 to follow the secondary downward pressure of the printer body 1. When the printer body 1 is pressed down for the second time and separated from the base 2, the upward movement operation of the printer body 1 can be achieved by utilizing the reaction force of the second spring 27 after compression and rebound, further improving the convenience of the separation operation of the printer body 1 and the base 2.

[0026] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A small inkjet color printer, comprising a printer body (1) and a base (2), characterized in that: The printer body (1) is composed of a shell (11), a printing unit (12), a paper roll unit (13) and a paper feed unit (14). The base (2) is provided with an embedding groove (21). The bottom end of the shell (11) is vertically inserted into the embedding groove (21). The bottom end of the base (2) is provided with a plurality of adsorption components (3). The adsorption components (3) are composed of a stud (31), a suction cup (32) and a nut (33). The stud (31) is provided on the bottom end of the base (2). The suction cup (32) is provided on the bottom end of the stud (31). The nut (33) is threadedly connected to the stud (31). The base (2) is provided with a side near the paper outlet of the printer body (1). A guide assembly (4) is provided. The guide assembly (4) consists of two ear blocks (41), a connecting shaft (42), a guide plate (43), a straight slot (44) and a slot (45). The two ear blocks (41) are symmetrically connected to the base (2). The connecting shaft (42) is connected between the two ear blocks (41). The guide plate (43) extends outward from the base (2) and is arranged on the connecting shaft (42) in an inclined shape from bottom to top. The straight slot (44) is opened on both sides of the guide plate (43). The connecting shaft (42) is arranged in the straight slot (44). The slot (45) is opened on the outer side of the base (2). One side of the guide plate (43) is inserted into the slot (45).

2. A small inkjet color printer according to claim 1, characterized in that: The housing (11) is composed of an integrated housing (111) and a detachable housing (112). The detachable housing (112) is located at the bottom and corresponds to the position of the paper roll unit (13). The detachable housing (112) and the integrated housing (111) are connected by a latch and a slot. A flip cover (114) is rotatably connected to the top of the integrated housing (111) via a rotating shaft (113). The position of the flip cover (114) corresponds to the position of the printing unit (12). Two screws (115) are threadedly connected to the inner side of the flip cover (114) away from the hinge. Two magnets (116) are embedded in the top of the integrated housing (111). The positions of the two magnets (116) respectively correspond to the positions of the two screws (115). A hand buckle slot (117) is provided on the side of the flip cover (114) away from the hinge.

3. A small inkjet color printer according to claim 2, characterized in that: The flip cover (114) is provided with a perspective window (118), and the perspective window (118) is tightly plugged into the flip cover (114) via an inserting shaft.

4. A small inkjet color printer according to claim 2, characterized in that: A raised rib (119) is provided on the inner side of the flip cover (114) near the hinge, and a micro switch (1110) is provided on the integrated housing (111). The micro switch (1110) corresponds to the position of the raised rib (119), and the micro switch (1110) can be electrically connected to an alarm device added inside the printer body (1).

5. The small inkjet color printer according to claim 2, characterized in that: Two plug-in assemblies (5) are provided on the bottom ends of the integrated shell (111) and the detachable shell (112). The plug-in assembly (5) consists of a first plug rod (51), a second plug rod (52), a first plug block (53) and a second plug block (54). The first plug rod (51) is connected to the bottom ends of the integrated shell (111) and the detachable shell (112). The second plug rod (52) is connected to the bottom end of the first plug rod (51) and has an outer diameter smaller than that of the first plug rod (51). The first plug block (53) is connected to the bottom end of the second plug rod (52) in a cone shape, and the outer diameter gradually increases from bottom to top. The second plug block (54) is connected to the outer wall of the second plug rod (52) in a cone shape and axially slides, and the outer diameter gradually decreases from bottom to top. The embedding groove (21) is provided with a plurality of The jacks (22) are each corresponding to the position of the first plug block (53). Two guide grooves (23) are provided in the side wall of each jack (22). A first spring (24) is provided in each guide groove (23). A latch (25) is provided on each first spring (24). The latch (25) is arranged between the upper end of the first plug block (53) and the lower end of the second plug block (54). The side of the latch (25) close to the embedded groove (21) is inclined, and the side away from the embedded groove (21) is flat. The maximum outer diameter of the first plug block (53) is smaller than the maximum outer diameter of the second plug block (54). A collar (55) is provided on one end of the second plug block (54) close to the first plug block (53). The inner diameter of the collar (55) is the same as the maximum outer diameter of the first plug block (53).

6. The small inkjet color printer according to claim 1, characterized in that: A circular spring groove (26) is provided on the embedding groove (21), and a plurality of second springs (27) are arranged evenly in a circumferential shape in the spring groove (26). The plurality of second springs (27) are connected to a same pad (28), and the pad (28) is arranged below the printer body (1) and contacts the bottom end of the printer body (1).

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