Handheld ink-jet printer

Abstract

The invention relates to the field of ink-jet printing machines, and particularly discloses a handheld ink-jet printing machine which comprises a main machine body, a wrapping frame is detachably fixed to the main machine body, two positioning assemblies used for positioning the distance between a spray head of the main machine body and the surface of an object are fixed to the wrapping frame, and the two positioning assemblies are symmetrically arranged up and down with the spray head of the main machine body as the center. The positioning assembly comprises a connecting base fixed to the coating frame, two sliding blocks and two positioning wheels, the connecting base is close to a spray head of the main machine body and is parallel to the advancing direction of the main machine body during code spraying, and due to the fact that the positioning wheels roll along with the advancing process of the code spraying machine and the diameters of the positioning wheels are fixed, when a plane is sprayed, the distance between the code spraying machine and the surface of an object is fixed; and when the curved surface is sprayed, the distance between the two positioning wheels on the same connecting seat is adjusted, so that the distance between the spray head of the main machine body and the surface of the object is adjusted by controlling the abutting positions of the positioning wheels and the curved surface, and therefore, it is ensured that the code spraying machine is in a proper code spraying distance, and the code spraying effect is ensured.

Description

Technical Field

[0001] The invention relates to the field of inkjet printers, in particular to a handheld inkjet printer. Background Art

[0002] An inkjet printer is a device that uses software control to mark products in a non-contact manner, and a handheld inkjet printer is a portable inkjet device among inkjet printers. A traditional handheld inkjet printer is mainly composed of a printer body, a handle, and a roller. The roller is used to limit the distance between the nozzle of the printer body and the surface of the object to avoid direct contact between the nozzle and the object. Since the position of the roller of a traditional inkjet printer is fixed, a handheld inkjet printer needs to perform inkjet printing on curved objects. If the diameter and curvature of the curved object are small, the distance between the rollers is too large compared to the curved object. When the two rollers abut against the surface of the curved object, the surface of the curved object may be too close to the nozzle, resulting in poor inkjet printing effect. If the curvature of the curved object is so small that the two rollers on the inkjet printer cannot abut against it at the same time, the curved object will inevitably contact the nozzle of the inkjet printer, affecting the normal inkjet printing. Summary of the invention

[0003] The object of the present invention is to provide a handheld inkjet printer to overcome the above-mentioned defects in the prior art.

[0004] A handheld inkjet printer according to the present invention includes a main body, a covering frame is detachably fixed to the main body, two positioning components are fixed to the covering frame for positioning the distance between the nozzle of the main body and the surface of an object, the two positioning components are symmetrically arranged up and down with the nozzle of the main body as the center, the positioning component includes a connecting seat fixed on the covering frame, two sliders and two positioning wheels, the connecting seat is close to the nozzle of the main body and parallel to the travel direction of the main body when spraying coding, the positioning wheel is located on one side of the main body and close to the position of the connecting seat, the axis of the positioning wheel is parallel to a side surface of the main body where the nozzle is arranged and is perpendicular to the travel direction of the main body when spraying coding, a sliding groove is opened on a side surface of the connecting seat close to the positioning wheel, the slider is slidably connected to the sliding groove, and the slider can be fixed in the sliding groove by a locking structure.

[0005] Through the above technical solution, since the positioning wheel rolls as the printer moves and its diameter is fixed, when spraying a flat surface, the distance between the printer and the surface of the object is fixed. When spraying a curved surface, the distance between the two positioning wheels on the same connecting seat is adjusted, thereby controlling the contact position between the positioning wheel and the curved surface, thereby adjusting the distance between the nozzle of the main body and the surface of the object, thereby ensuring that the printer is at an appropriate coding distance and ensuring the coding effect.

[0006] The present invention is further configured as follows: a guide rod penetrating the slider along the sliding direction of the slider is fixed on the side wall of the slide groove, the slider is slidably connected to the guide rod, and a connecting plate fixed on the guide rod is rotatably connected inside the positioning wheel.

[0007] Through the above technical solution, the sliding block is restricted in the sliding groove and slides in the sliding groove, so that the positioning wheel can only slide along the length direction of the connecting seat.

[0008] The present invention is further configured as follows: a through groove connected to the corresponding side slide groove is opened on a side of the connecting seat away from the nozzle of the main body, and the locking structure includes a bolt and a nut, the bolt is fixed to a side of the slider close to the through groove and passes through the through groove, and the nut is threadedly connected to the outer periphery of the bolt and can abut against a side of the connecting seat with the through groove.

[0009] Through the above technical solution, after the nut is tightened, it cooperates with the slider to clamp the connecting seat, thereby limiting the sliding of the slider.

[0010] The present invention is further configured as follows: the covering frame is composed of two half frames, the half frames include two C-shaped plates and two covering plates connecting the C-shaped plates, the C-shaped plates are composed of vertical plates arranged vertically and horizontal plates fixed at both ends of the vertical plates and arranged horizontally, the vertical plates and the two horizontal plates form a "C" shape, the covering plates are arranged at the connection between the horizontal plates and the vertical plates, the covering plates are covered on the edges of the main body that are consistent with the direction of travel when the main body is sprayed with code, and the connecting seat is fixed to the covering plate on one side close to the positioning wheel.

[0011] Through the above technical solution, the covering plate covers the edges of the main body to increase the connection stability between the covering frame and the main body.

[0012] The present invention is further configured as follows: the two half frames are connected by four connecting structures, the connecting structures include a rotating wheel and two threaded sleeves, the rotating wheel passes through the two threaded sleeves and is threadedly connected to the two threaded sleeves, the thread rotation directions of the two threaded sleeves of the same connecting structure are opposite, a screw fixed on the outer periphery of the rotating wheel is arranged between the two threaded sleeves of the same connecting structure, and the eight threaded sleeves are respectively fixed on the end faces of the eight horizontal plates on one side away from the main body.

[0013] Through the above technical solution, rotating the screw rod can make the threaded sleeves on the adjacent two sides move away from or closer to each other, thereby making the two half frames move away from or closer to each other, so that the covering frame can be covered and fixed on the main body or separated from the main body.

[0014] The present invention is further configured as follows: two vertical plates close to the positioning wheel are fixed with two vertically symmetrical hinged seats, hinged rods are hinged in the hinged seats, guide wheels are rotatably connected between the two hinged rods on the same side, and torsion springs are fixedly connected between the hinged rods and the vertical plates on the corresponding sides.

[0015] Through the above technical solution, the guide wheel can rotate around the hinge seat, and the guide wheel can be reset under the elastic force of the torsion spring.

[0016] The present invention is further configured as follows: the maximum value of the vertical distance between the guide wheel and the side of the main body on which the nozzle is provided is greater than the maximum value of the vertical distance between the positioning wheel and the side, and the minimum value of the vertical distance between the guide wheel and the side of the main body on which the nozzle is provided is less than the minimum value of the vertical distance between the positioning wheel and the side.

[0017] Through the above technical solution, when the positioning wheel abuts against the surface of an object, the guide wheel is pressed on the surface of the object, so that there is a large friction between the guide wheel and the surface of the object, and then the guide wheel rolls to guide the direction of travel of the inkjet printer.

[0018] The present invention is further configured as follows: a central axis penetrating through the torsion spring is fixed on the hinge seat.

[0019] Through the above technical solution, the setting of the central axis is conducive to ensuring that the torsion spring remains stable when tightened.

[0020] The beneficial effect of the present invention is that since the positioning wheel rolls as the printer moves and its diameter is fixed, when spraying a flat surface, the distance between the printer and the surface of the object is fixed, and when spraying a curved surface, the distance between the two positioning wheels on the same connecting seat is adjusted, thereby controlling the contact position between the positioning wheel and the curved surface, thereby adjusting the distance between the nozzle of the main body and the surface of the object, thereby ensuring that the printer is at an appropriate coding distance and ensuring the coding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of the main body in the present invention; Figure 3 It is a schematic diagram of the structure of the covering frame in the present invention; Figure 4 The present invention Figure 3 The enlarged schematic diagram at A in the middle; Figure 5 is a cross-sectional schematic diagram of the connecting seat in the present invention; Figure 6 The present invention Figure 5 The enlarged schematic diagram of point B in the middle; Figure 7 It is a schematic diagram of the structure of the torsion spring in the present invention; Figure 8 The present invention Figure 7 Enlarged schematic diagram at point C in the middle.

[0022] In the figure: 10. Main body; 20. Vertical plate; 21. Covering plate; 22. Horizontal plate; 30. Threaded sleeve; 31. Screw; 32. Rotating wheel; 40. Positioning wheel; 41. Connecting seat; 42. Bolt; 43. Nut; 44. Slide; 45. Guide rod; 46. Sliding block; 47. Through groove; 48. Connecting plate; 50. Guide wheel; 51. Articulated rod; 52. Articulated seat; 53. Center axis; 54. Torsion spring. DETAILED DESCRIPTION

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of simplifying the description of the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described in conjunction with the embodiments below. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention. As used herein, the terms up and down and left and right are not limited to their strict geometric definitions, but include tolerances for reasonable and inconsistent machining or human errors. The specific features of this handheld inkjet printer are described in detail below: An embodiment of the present invention: Reference Figure 1-Figure 8The present invention provides a handheld inkjet printer, including a main body 10, the main body 10 includes an inkjet printer body, a handle arranged at the lower side of the inkjet printer body and a nozzle arranged at the front side of the inkjet printer body, a covering frame is detachably fixed on the main body 10, and two positioning components for positioning the distance between the nozzle of the main body 10 and the surface of an object are fixed on the covering frame. The two positioning components are symmetrically arranged up and down with the nozzle of the main body 10 as the center, and the positioning components include a connecting seat 41 fixed on the covering frame, two sliders 46 and two A positioning wheel 40 is provided, and a connecting seat 41 is close to the nozzle of the main body 10 and parallel to the direction of travel of the main body 10 when the main body 10 is sprayed with code. The positioning wheel 40 is located on one side of the main body 10 and close to the connecting seat 41. The axis of the positioning wheel 40 is parallel to a side of the main body 10 on which the nozzle is provided and is perpendicular to the direction of travel of the main body 10 when the main body 10 is sprayed with code. A sliding groove 44 is provided on a side of the connecting seat 41 close to the positioning wheel 40, and a slider 46 is slidably connected in the sliding groove 44. The slider 46 can be fixed in the sliding groove 44 by a locking structure.

[0025] Reference Figure 1 , Figure 4 , Figure 6 , Figure 8 A guide rod 45 is fixed on the side wall of the slide groove 44 and penetrates the slider 46 along the sliding direction of the slider 46. The slider 46 is slidably connected to the guide rod 45. A connecting plate 48 fixed on the guide rod 45 is rotatably connected in the positioning wheel 40. The positioning wheel 40 is dumbbell-shaped. The central axis 53 of the positioning wheel 40 penetrates the connecting plate 48 and is rotatably connected to the connecting plate 48. A through groove 47 connected to the corresponding side slide groove 44 is opened on one side of the nozzle of the connecting seat 41 away from the main body 10. The locking structure includes a bolt 42 and a nut 43. The bolt 42 is fixed to a side of the slider 46 close to the through groove 47 and penetrates the through groove 47. The nut 43 is threadedly connected to the outer periphery of the bolt 42 and can abut against a side of the connecting seat 41 where the through groove 47 is opened.

[0026] Reference Figure 2 , Figure 3 , Figure 6 The covering frame is composed of two half frames, and the half frames include two C-shaped plates and two covering plates 21 connecting the C-shaped plates. The C-shaped plate is composed of a vertical plate 20 arranged vertically and a horizontal plate 22 fixed at both ends of the vertical plate 20 and arranged horizontally. The vertical plate 20 and the two horizontal plates 22 form a "C" shape. The covering plate 21 is arranged at the connection between the horizontal plate 22 and the vertical plate 20. The covering plate 21 is covered on the edge of the main body 10 that is consistent with the direction of travel of the main body 10 when the coding is sprayed. The connecting seat 41 is fixed on the covering plate 21 on one side close to the positioning wheel 40.

[0027] Reference Figure 3The two half frames are connected by four connecting structures, which include a rotating wheel 32 and two threaded sleeves 30. The rotating wheel 32 passes through the two threaded sleeves 30 and is threadedly connected to the two threaded sleeves 30. The thread rotation directions of the two threaded sleeves 30 of the same connecting structure are opposite. A screw 31 fixed to the outer periphery of the rotating wheel 32 is arranged between the two threaded sleeves 30 of the same connecting structure. The eight threaded sleeves 30 are respectively fixed to the end surfaces of the eight horizontal plates 22 away from the main body 10.

[0028] Two vertical plates 20 close to the positioning wheel 40 are fixed with two vertically symmetrical hinged seats 52, and a hinged rod 51 is hinged inside the hinged seat 52. A guide wheel 50 is rotatably connected between the two hinged rods 51 on the same side. The guide wheel 50 is made of rubber material, and a torsion spring 54 is fixedly connected between the hinged rod 51 and the vertical plate 20 on the corresponding side.

[0029] Reference Figure 2 , Figure 7 , Figure 8 The maximum value of the vertical distance between the guide wheel 50 and the side of the main body 10 where the nozzle is provided is greater than the maximum value of the vertical distance between the positioning wheel 40 and the side, the minimum value of the vertical distance between the guide wheel 50 and the side of the main body 10 where the nozzle is provided is less than the minimum value of the vertical distance between the positioning wheel 40 and the side, and a central axis 53 passing through the torsion spring 54 is fixed on the hinge seat 52.

[0030] When the inkjet printer is inkjetting on a plane, the two sliders 46 in the same slide groove 44 are moved to the two ends of the slide groove 44 respectively, and the nuts 43 are tightened to fix the sliders 46 in the slide groove 44 .

[0031] At this time, the required coding logo pattern is set on the main body 10, and then the nozzle of the main body 10 is aimed at the surface of the flat object, and the main body 10 is pressed toward the object, so that the guide wheels 50 on both sides of the main body 10 move away from each other and rotate around the hinge seat 52. At this time, the hinge rod 51 rotates around the hinge seat 52 and drives the torsion spring 54 to reel and store force.

[0032] Until the positioning wheel 40 contacts the surface of the object, the main body 10 is driven to move in the direction indicated by the mark, so that the main body 10 sprays the code on the surface of the object to form a mark.

[0033] If it is necessary to inkjet the curved surface, adjust the distance between the two positioning wheels 40 on the same connecting seat 41 so that when the four positioning wheels 40 are in contact with the curved surface at the same time, there is still an appropriate inkjet distance between the nozzle of the main body 10 and the curved surface object. At this time, tighten the nut 43 to fix the position of the positioning wheel 40.

[0034] Then, the main body 10 is pressed toward the direction close to the curved object and the coding operation is performed.

[0035] If the positioning wheel 40 or the guide wheel 50 needs to be replaced or repaired, the screw rod 31 is rotated to rotate the rotating wheel 32, thereby driving the two threaded sleeves 30 on the corresponding sides to move away from each other, and then the two half frames are moved away from each other until the distance between the covering plates 21 on the two half frames is greater than the width of the main body 10. At this time, the covering frame can be removed from the main body 10, so as to facilitate the repair or replacement of the positioning wheel 40 and the guide wheel 50. Moreover, when covered on the main body 10, it can have a certain protective effect on the main body 10 and reduce the bumps of the main body 10.

[0036] It will be clear to those skilled in the art that various modifications may be made to the above embodiments without departing from the overall spirit and concept of the present invention. All of them fall within the protection scope of the present invention. The protection scheme of the present invention shall be subject to the claims attached to the present invention.

Claims

1. A handheld inkjet printer, comprising a main body (10), characterized in that: The main body (10) is detachably fixed with a covering frame, and two positioning components for limiting the distance between the nozzle of the main body (10) and the surface of an object are fixed on the covering frame. The two positioning components are symmetrically arranged up and down with the nozzle of the main body (10) as the center. The positioning components include a connecting seat (41) fixed to the covering frame, two sliders (46) and two positioning wheels (40). The connecting seat (41) is close to the nozzle of the main body (10) and parallel to the movement of the main body (10) when the coding is sprayed. In the forward direction, the positioning wheel (40) is located on one side of the main body (10) and close to the connecting seat (41); the axis of the positioning wheel (40) is parallel to the side of the main body (10) provided with the nozzle and is perpendicular to the forward direction of the main body (10) when the main body (10) is sprayed with codes; a sliding groove (44) is provided on the side of the connecting seat (41) close to the positioning wheel (40); the sliding block (46) is slidably connected in the sliding groove (44); and the sliding block (46) can be fixed in the sliding groove (44) by a locking structure.

2. A handheld inkjet printer according to claim 1, characterized in that: A guide rod (45) is fixed on the side wall of the slide groove (44). The guide rod (45) penetrates the slider (46) along the sliding direction of the slider (46). The slider (46) is slidably connected to the guide rod (45). A connecting plate (48) fixed to the guide rod (45) is rotatably connected inside the positioning wheel (40).

3. A handheld inkjet printer according to claim 1, characterized in that: A through slot (47) communicating with the slide slot (44) is formed on a side of the connection seat (41) away from the nozzle of the main body (10). The locking structure comprises a bolt (42) and a nut (43). The bolt (42) is fixed to a side of the slide block (46) close to the through slot (47) and passes through the through slot (47). The nut (43) is threadedly connected to the bolt (42) and can abut against a side of the connection seat (41) having the through slot (47).

4. A handheld inkjet printer according to claim 1, characterized in that: The wrapping frame is composed of two half frames, each half frame comprising two C-shaped plates and two wrapping plates (21) connected to the C-shaped plates, the C-shaped plates comprising a vertical plate (20) and a horizontal plate (22) fixed at both ends of the vertical plate (20), the wrapping plate (21) being arranged at the connection between the horizontal plate (22) and the vertical plate (20), the wrapping plate (21) wrapping the main body (10) and being located on an edge which is consistent with the direction of travel of the main body (10) when printing, and the connecting seat (41) being fixed on the wrapping plate (21) on one side close to the positioning wheel (40).

5. A handheld inkjet printer according to claim 4, characterized in that: The two half frames are connected via four connection structures, wherein the connection structures include a rotating wheel (32) and two threaded sleeves (30), the rotating wheel (32) passes through the two threaded sleeves (30) and is threadedly connected to the two threaded sleeves (30), the threaded directions of the two threaded sleeves (30) of the same connection structure are opposite, a screw rod (31) fixed to the outer circumference of the rotating wheel (32) is arranged between the two threaded sleeves (30) of the same connection structure, and the eight threaded sleeves (30) are respectively fixed to the end surfaces of eight horizontal plates (22) on one side away from the main body (10).

6. A handheld inkjet printer according to claim 4, characterized in that: Two vertically symmetrical hinge seats (52) are fixed on the two vertical plates (20) close to the positioning wheel (40), a hinge rod (51) is hinged inside the hinge seat (52), a guide wheel (50) is rotatably connected between the two hinge rods (51) on the same side, and a torsion spring (54) is fixedly connected between the hinge rod (51) and the vertical plate (20).

7. A handheld inkjet printer according to claim 6, characterized in that: The maximum value of the vertical distance between the guide wheel (50) and a side of the main body (10) on which the nozzle is provided is greater than the maximum value of the vertical distance between the positioning wheel (40) and the side, and the minimum value of the vertical distance between the guide wheel (50) and the side of the main body (10) on which the nozzle is provided is less than the minimum value of the vertical distance between the positioning wheel (40) and the side.

8. The handheld inkjet printer according to claim 6, characterized in that: A central axis (53) penetrating the torsion spring (54) is fixed on the hinge seat (52).

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