A handheld inkjet printer

Abstract

The present invention relates to the field of inkjet printers, and specifically discloses a handheld inkjet printer, which includes a main body. A covering frame is detachably fixed on the main body. Two positioning components for positioning the distance between the nozzle of the main body 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 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 traveling direction when the main body performs inkjet printing. Since the positioning wheels roll during the traveling process of the inkjet printer and their diameters are fixed, when spraying on a flat surface, the distance between the inkjet printer and the surface of the object is fixed. When spraying on a curved surface, by adjusting the distance between the two positioning wheels on the same connecting seat, the contact position between the positioning wheels and the curved surface is controlled, so as to adjust the distance between the nozzle of the main body and the surface of the object, and further ensure that the inkjet printer is at an appropriate inkjet distance, ensuring the inkjet effect.

Description

Technical Field

[0001] The present invention relates to the field of inkjet printers, and particularly to a handheld inkjet printer. Background Art

[0002] An inkjet printer is a device that uses software control to identify products in a non-contact manner. A handheld inkjet printer is a portable inkjet device among inkjet printers. Traditional handheld inkjet printers mainly consist of an inkjet printer main body, a handle, and rollers. The rollers are used to limit the distance between the nozzle of the inkjet printer main body and the surface of an object, to prevent the nozzle from directly contacting the object. Since the positions of the rollers of traditional inkjet printers are fixed, when a handheld inkjet printer needs to perform inkjet operations on a curved object, if the diameter of the curved object is small and the curvature is small, the distance between the rollers is relatively too large compared to the curved object. When the two rollers are in contact with the surface of the curved object, it may cause the surface of the curved object to be too close to the nozzle, resulting in a poor inkjet effect. If the curvature of the curved object is so small that the two rollers on the inkjet printer cannot be in contact with it simultaneously, then the curved object will inevitably come into contact with the nozzle of the inkjet printer, affecting the normal progress of inkjetting. Summary of the Invention

[0003] The purpose 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 on the main body. Two positioning components for positioning the distance between the nozzle of the main body 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 as the center. Each 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 traveling direction of the main body during inkjetting. The positioning wheels are located on one side of the main body and close to the connecting seat. The axis of the positioning wheel is parallel to the side surface of the main body where the nozzle is provided and perpendicular to the traveling direction of the main body during inkjetting. A chute is formed on one side surface of the connecting seat close to the positioning wheel. The slider is slidably connected to the chute, and the slider can be fixed in the chute through a locking structure.

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

[0006] The present invention is further configured such that: a guide rod penetrating the slider along the sliding direction of the slider is fixed on the side wall of the chute, 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 slider is restricted within the chute and slides within the chute, so that the positioning wheel can only slide along the length direction of the connecting seat.

[0008] The present invention is further configured such that: a through groove communicating with the corresponding side chute is provided on a side surface of the connecting seat away from the nozzle of the main body, the locking structure includes a bolt and a nut, the bolt is fixed on a side surface of the slider close to the through groove and penetrates the through groove, and the nut is threadedly connected to the outer periphery of the bolt and can abut against the surface of the connecting seat where the through groove is provided.

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

[0010] The present invention is further configured such that: the covering frame is composed of two half frames, each half frame includes two C-shaped plates and two covering plates connecting the C-shaped plates, the C-shaped plate is composed of a vertically arranged vertical plate and horizontal plates fixedly provided at both ends of the vertical plate and arranged horizontally, the vertical plate and the two horizontal plates form a "C" shape, the covering plate is arranged at the connection of the horizontal plate and the vertical plate, the covering plate covers the edge of the main body along the advancing direction during the inkjet coding of the main body, and the connecting seat is fixed on the covering plate on the side close to the positioning wheel.

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

[0012] The present invention is further configured such that: the two half frames are connected through four connecting structures, the connecting structure includes a rotating wheel and two threaded sleeves, the rotating wheel penetrates the two threaded sleeves and is threadedly connected to the two threaded sleeves, the thread directions of the two threaded sleeves of the same connecting structure are opposite, a screw rod 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 away from the main body.

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

[0014] The present invention is further configured such that: on both vertical plates close to the positioning wheel, two symmetrically arranged hinge seats are fixed up and down. An articulated rod is hinged within the hinge seat, and a guide wheel is rotatably connected between the two articulated rods on the same side. A torsion spring is fixedly connected between the articulated rod and the corresponding vertical plate.

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

[0016] The present invention is further configured such that: the maximum value of the vertical distance between the guide wheel and the surface of the main body of the machine where the nozzle is provided is greater than the maximum value of the vertical distance between the positioning wheel and this surface, and the minimum value of the vertical distance between the guide wheel and the surface of the main body of the machine where the nozzle is provided is less than the minimum value of the vertical distance between the positioning wheel and this surface.

[0017] Through the above technical solution, when the positioning wheel abuts against the surface of the object, the guide wheel presses on the surface of the object, so that a large frictional force is generated between the guide wheel and the surface of the object. Furthermore, under the rolling of the guide wheel, the traveling direction of the inkjet printer can be guided.

[0018] The present invention is further configured such that: a central shaft passing through the torsion spring is fixed on the hinge seat.

[0019] Through the above technical solution, the setting of the central shaft is beneficial to ensuring the stability of the torsion spring when it is tightened.

[0020] The beneficial effect of the present invention is that: since the positioning wheel rolls during the progress of the inkjet printer and its diameter is fixed, when spraying on a flat surface, the distance between the inkjet printer and the surface of the object is fixed. When spraying on a curved surface, by adjusting the distance between the two positioning wheels on the same connecting seat, thereby controlling the abutting position of the positioning wheel and the curved surface, the distance between the nozzle of the main body of the machine and the surface of the object is adjusted, and further ensuring that the inkjet printer is at an appropriate inkjet distance to ensure the inkjet effect. Brief Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2 is a schematic structural diagram of the main body of the machine in the present invention;

[0023] Figure 3 is a schematic structural diagram of the covering frame in the present invention;

[0024] Figure 4 is the present invention Figure 3 magnified schematic diagram at A;

[0025] Figure 5 is a cross-sectional schematic diagram of the connecting seat in the present invention;

[0026] Figure 6 The present invention Figure 5 The enlarged schematic diagram of point B in the middle;

[0027] Figure 7 It is a schematic diagram of the structure of the torsion spring in the present invention;

[0028] Figure 8 The present invention Figure 7 Enlarged schematic diagram at point C in the middle.

[0029] In the figure:

[0030] 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

[0031] 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.

[0032] 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:

[0033] An embodiment of the present invention:

[0034] Reference Figures 1-8, the present invention provides a handheld inkjet printer, which includes a main body 10. The main body 10 includes an inkjet printer main body, a handle disposed on the lower side of the inkjet printer main body, and a nozzle disposed on the front side of the inkjet printer main 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. The positioning component includes a connecting seat 41 fixed on 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 traveling direction when the main body 10 performs inkjet printing. 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 one side surface of the main body 10 where the nozzle is provided and perpendicular to the traveling direction when the main body 10 performs inkjet printing. A chute 44 is formed on one side surface of the connecting seat 41 close to the positioning wheel 40. The slider 46 is slidably connected in the chute 44, and the slider 46 can be fixed in the chute 44 through a locking structure.

[0035] Referring to Figure 1 , Figure 4 , Figure 6 , Figure 8 , a guide rod 45 penetrating the slider 46 along the sliding direction of the slider 46 is fixed on the side wall of the chute 44. The slider 46 is slidably connected to the guide rod 45. A connecting plate 48 fixed on the guide rod 45 is rotatably connected inside the positioning wheel 40. The positioning wheel 40 is in a dumbbell shape. 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 communicating with the corresponding chute 44 is formed on one side surface of the connecting seat 41 away from the nozzle of the main body 10. The locking structure includes a bolt 42 and a nut 43. The bolt 42 is fixed on one side surface 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 the surface of the connecting seat 41 where the through groove 47 is formed.

[0036] Referring to Figure 2 , Figure 3 , Figure 6 , the covering frame is composed of two half frames. The half frame includes two C-shaped plates and two covering plates 21 connecting the C-shaped plates. The C-shaped plate is composed of a vertically arranged vertical plate 20 and horizontal plates 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 disposed at the connection between the horizontal plate 22 and the vertical plate 20. The covering plate 21 covers the edge of the main body 10 that is consistent with the traveling direction when the main body 10 performs inkjet printing. The connecting seat 41 is fixed on one of the covering plates 21 close to the positioning wheel 40.

[0037] Referring to Figure 3, the two half frames are connected by four connecting structures. The connecting structure includes 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 directions of the two threaded sleeves 30 of the same connecting structure are opposite. A screw rod 31 fixed to the outer periphery of the rotating wheel 32 is provided between the two threaded sleeves 30 of the same connecting structure. The eight threaded sleeves 30 are respectively fixed to the end faces on the side away from the main body 10 of the eight cross plates 22.

[0038] Two symmetrically arranged hinge seats 52 are fixed on each of the two vertical plates 20 close to the positioning wheel 40. A hinge rod 51 is hinged in the hinge seat 52. A guide wheel 50 is rotatably connected between the two hinge rods 51 on the same side. The guide wheel 50 is made of rubber material. A torsion spring 54 is fixedly connected between the hinge rod 51 and the corresponding vertical plate 20.

[0039] Refer to Figure 2 , Figure 7 , Figure 8 , the maximum value of the vertical distance between the guide wheel 50 and the surface of the main body 10 with the nozzle is greater than the maximum value of the vertical distance between the positioning wheel 40 and this surface, and the minimum value of the vertical distance between the guide wheel 50 and the surface of the main body 10 with the nozzle is less than the minimum value of the vertical distance between the positioning wheel 40 and this surface. A central shaft 53 passing through the center of the torsion spring 54 is fixed on the hinge seat 52.

[0040] When the inkjet printer jets codes on a plane, the two sliders 46 in the same chute 44 are respectively moved to both ends of the chute 44, and the nuts 43 are tightened so that the sliders 46 are fixed in the chute 44.

[0041] At this time, the identification pattern to be jetted is set on the main body 10 of the machine, and then the nozzle of the main body 10 of the machine is aligned with the surface of the flat object, and the main body 10 of the machine is pressed in the direction close to 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 wind up and store energy.

[0042] Until the positioning wheel 40 abuts against the object surface, at this time, the main body 10 of the machine is driven to move in the indicated direction of the identification, so that the main body 10 of the machine jets codes on the object surface to form an identification.

[0043] If it is necessary to jet codes on a curved surface, the distance between the two positioning wheels 40 on the same connecting seat 41 is adjusted so that when the four positioning wheels 40 are in contact with the curved surface at the same time, there is still an appropriate jetting distance between the nozzle of the main body 10 of the machine and the curved surface object. At this time, the nut 43 is tightened so that the position of the positioning wheel 40 is fixed.

[0044] Then, the main body 10 of the machine is pressed in the direction close to the curved surface object and the jetting operation is carried out.

[0045] When it is necessary to replace or repair the positioning wheel 40 or the guide wheel 50, the screw 31 is rotated, so that the runner 32 rotates, thereby driving the two threaded sleeves 30 on the corresponding side to move away from each other, and further causing the two half frames to move 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, which is convenient for the repair or replacement of the positioning wheel 40 and the guide wheel 50. Moreover, when covering the main body 10, it can play a certain protective role on the main body 10 and reduce the collision of the main body 10.

[0046] Those skilled in the art can clearly understand that various modifications to the above embodiments can be made without departing from the general spirit and concept of the present invention. All of them fall within the protection scope of the present invention. The protection scope of the present invention is 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 coding is sprayed; 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; A guide rod (45) is fixed on the side wall of the slide groove (44), the guide rod (45) penetrates the slide block (46) along the sliding direction of the slide block (46), the slide block (46) is slidably connected to the guide rod (45), and a connecting plate (48) fixed to the guide rod (45) is rotatably connected inside the positioning wheel (40); 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); 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 provided 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 one side of eight transverse plates (22) away from the main body (10); 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).

2. 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).

3. A handheld inkjet printer according to claim 1, 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.

4. A handheld inkjet printer according to claim 1, characterized in that: A central axis (53) penetrating the torsion spring (54) is fixed on the hinge seat (52).

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