A printing device

Abstract

The present invention provides a printing device, which relates to the field of printing technology; the printing device includes a direct writing print head, which is used to perform printing operations on a printed substrate by contact; a pressure adjustment mechanism matched with the direct writing print head, which is used to adjust a first contact pressure between the direct writing print head and the printed substrate to a second contact pressure; the direct writing print head performs printing operations on the printed substrate with the second contact pressure. The present invention can meet the printing requirements of different contact pressures by arranging a pressure adjustment mechanism for the direct writing print head, ensure a good printing effect, and improve the reliability and stability of the printer.

Description

Technical Field

[0001] The present invention belongs to the technical field of printing equipment, and in particular relates to a printing equipment. Background Art

[0002] With the continuous advancement of printed electronics technology, conductive fluids represented by liquid metals have emerged, making it possible to print wires to make liquid metal flexible electronic circuits. This has not only changed the traditional PCB hard electronic circuit manufacturing model, but also greatly reduced the time and cost of electronic circuit manufacturing. On the other hand, due to the large surface tension of liquid metal, it is not suitable for inkjet printing. The most stable ink output method is direct writing printing, which is similar to the use of a writing pen. The direct writing print head needs to contact the printed substrate with a certain pressure, and then form the required liquid metal pattern on the printed substrate by writing.

[0003] At present, liquid metal printers mainly use the weight of the direct writing print head to resist the printing substrate, so that the contact pressure between the two is formed by the weight of the print head. However, when the actual contact pressure demand increases or decreases, the liquid metal printer cannot meet its demand, resulting in a decrease in printing effect. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a printing device to solve the problem that the direct writing printer in the prior art cannot meet the printing requirements of different contact pressures.

[0005] In some illustrative embodiments, the printing device includes: a direct-write print head for performing printing operations on a printed substrate by contact; a pressure adjustment mechanism cooperating with the direct-write print head, for adjusting a first contact pressure between the direct-write print head and the printed substrate to a second contact pressure; and the direct-write print head performs printing operations on the printed substrate with the second contact pressure.

[0006] In some optional embodiments, the pressure adjustment mechanism includes a first elastic member; one end of the first elastic member is linked to the direct writing print head, and the other end thereof is fixed; the first contact pressure between the direct writing print head and the printed substrate is adjusted to the second contact pressure through the deformation state and deformation amount of the first elastic member.

[0007] In some optional embodiments, the deformation direction of the first elastic member is parallel to the direction in which the direct write print head contacts / leaves the printing substrate.

[0008] In some optional embodiments, the initial position of at least one end of the first elastic member is adjustable, so as to adjust the force of the first elastic member on the direct writing print head by changing one or more of the deformation degree, deformation state, and deformation direction of the first elastic member in the process of linkage with the direct writing print head.

[0009] In some optional embodiments, the first elastic member is an elastic rope or a spring.

[0010] In some optional embodiments, the printing device further includes: a driving mechanism cooperating with the direct writing print head, for driving the direct writing print head to move in a straight line direction, so as to control the direct writing print head to contact the printing substrate with the first contact pressure, or to detach from the printing substrate.

[0011] In some optional embodiments, the printing device further includes: a shock absorbing mechanism cooperating with the direct writing print head, for reducing the impact generated when the direct writing print head moves at the moment under the control of the driving mechanism.

[0012] In some optional embodiments, the direct writing print head has a free movement amount in its moving direction; the direct writing print head converts the reaction force generated at the moment of contacting the printed substrate into a vibration displacement through the free movement amount to avoid rigid vibration; and the shock absorbing mechanism includes a second elastic member for eliminating the vibration displacement of the direct writing print head.

[0013] In some optional embodiments, the second elastic member has a set deformation when the direct writing print head contacts the printed substrate, forming a force applied to the direct writing print head; the second contact pressure is a combination of the gravity of the direct writing print head, the force applied by the pressure regulating mechanism to the direct writing print head, and the force applied by the second elastic member to the direct writing print head.

[0014] In some optional embodiments, when the direct write print head contacts the printing substrate, the deformation of the second elastic member is zero.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The present invention can meet the printing requirements of different contact pressures by arranging a pressure regulating mechanism for the direct writing print head, thereby ensuring a good printing effect and improving the reliability and stability of the printer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a front view of a first embodiment of a printing device in an embodiment of the present invention;

[0018] Figure 2 is a side view of a first embodiment of a printing device in an embodiment of the present invention;

[0019] Figure 3 is a schematic structural diagram of a second embodiment of a printing device in an embodiment of the present invention;

[0020] Figure 4 is a structural schematic diagram of a sliding mechanism in a second embodiment of the present invention;

[0021] Figure 5 is a schematic diagram of a printing device in different states in a second embodiment of the present invention;

[0022] Figure 6 is a schematic structural diagram of a third embodiment of a printing device in an embodiment of the present invention;

[0023] Figure 7 is a schematic structural diagram of a fourth embodiment of a printing device in an embodiment of the present invention;

[0024] Figure 8 is a schematic structural diagram of a fifth embodiment of a printing device in an embodiment of the present invention;

[0025] Fig. 9 is a schematic structural diagram of a sixth embodiment of a printing device in an embodiment of the present invention;

[0026] Fig.10 is a schematic diagram of a printing device in different states in a sixth embodiment of the present invention;

[0027] Fig.11 is a schematic structural diagram of a seventh embodiment of a printing device in an embodiment of the present invention;

[0028] Fig.12 is a schematic structural diagram of an eighth embodiment of a printing device in an embodiment of the present invention;

[0029] Fig.13 is a schematic structural diagram of a ninth embodiment of a printing device in an embodiment of the present invention;

[0030] Fig.14 is a schematic structural diagram of a tenth embodiment of a printing device in an embodiment of the present invention;

[0031] Fig.15 is a schematic structural diagram of an eleventh embodiment of a printing device in an embodiment of the present invention;

[0032] Fig.16 is a perspective view of a twelfth embodiment of a printing device in an embodiment of the present invention;

[0033] Fig.17is a front view of a twelfth embodiment of a printing device in an embodiment of the present invention;

[0034] Fig.18 is a schematic structural diagram of a thirteenth embodiment of a printing device in an embodiment of the present invention;

[0035] Fig.19 is a schematic structural diagram of a fourteenth embodiment of a printing device in an embodiment of the present invention;

[0036] Fig. 20 It is a schematic structural diagram of the fifteenth embodiment of the printing device in the embodiments of the present invention. DETAILED DESCRIPTION

[0037] The following description and the accompanying drawings fully illustrate specific embodiments of the present invention so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The examples represent possible variations only. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The scope of the embodiments of the present invention includes the entire scope of the claims, and all available equivalents of the claims. In this article, these embodiments of the present invention may be represented individually or collectively by the term "invention", which is merely for convenience, and if more than one invention is disclosed in fact, it is not intended to automatically limit the scope of the application to any single invention or inventive concept.

[0038] It should be noted that the various technical features in the embodiments of the present invention can be combined with each other without conflict.

[0039] The present invention provides a printing device, specifically, as Figure 1-2 As shown, Figure 1 The structure of the printing device in the embodiment of the present invention is shown in FIG. Figure 1 (face); Figure 2 The structure of the printing device in the embodiment of the present invention is shown in FIG. Figure 1 (Side view); The printing device includes: a direct writing print head 101 and a pressure regulating mechanism 102 cooperating with the direct writing print head 101; wherein, the direct writing print head 101 is used to perform printing operations on a printed substrate 103 by contact; the pressure regulating mechanism 102 is used to adjust the first contact pressure F1 between the direct writing print head 101 and the printed substrate 103 to a second contact pressure F2; the direct writing print head 101 performs printing operations on the printed substrate with the second contact pressure F2.

[0040] In this embodiment, the printing device further includes a guide post 104, which is cooperatively connected with the direct writing print head 101 to limit the movement of the direct writing print head 101 along the direction of the guide post 104. The maximum descending distance of the direct writing print head 101 along the direction of the guide post 104 should be greater than the distance between the direct writing print head 101 and the printed substrate 103, so that the printed substrate 103 can fully bear the gravity of the direct writing print head 101. At this time, the first contact pressure F1 is the gravity of the direct writing print head 101.

[0041] The pressure regulating mechanism 102 in this embodiment adopts a non-contact cooperation mode with the direct writing print head 101. For example, the pressure regulating mechanism 102 adopts an electromagnet 1021 whose magnetic direction is consistent with the moving direction of the direct writing print head 101, and a magnet 1022 with the same or opposite polarity as the electromagnet 1021 is relatively arranged on the direct writing print head 101. The position of the electromagnet 1021 is fixed. When the power is on, the electromagnet 1021 and the magnet 1022 generate a relative force △F, thereby generating a certain force △F on the direct writing print head 101 where the magnet 1022 is placed. When the relative force generated by the electromagnet 1021 and the magnet 1022 is expressed as an attractive force, F2=F1+△F; when the relative force generated by the electromagnet 1021 and the magnet 1022 is expressed as a repulsive force, F2=F1-△F (F1>△F). The magnitude of the relative force △F generated by the electromagnet 1021 and the magnet 1022 can be controlled by the magnitude of the current flowing through the electromagnet 1021, thereby satisfying the regulation of various contact pressures to ensure good printing effects under different liquid metals, different printing substrates, and different states of liquid metal.

[0042] The direct writing print head 101 in this embodiment is an example of a vertical moving direction. In other embodiments, the direct writing print head 101 can also move in the horizontal direction through a horizontally arranged guide column 104, or be arranged at a certain inclination with the horizontal / vertical direction, so as to meet the printing requirements of printed substrates placed in different directions. The pressure regulating mechanism 102 can be set accordingly in these embodiments, all of which belong to the same control principle, but the selected parameters are different.

[0043] For example, when the direct writing print head 101 moves in the horizontal direction to contact and separate from the printed substrate, the relative force △F generated by the electromagnet 1021 and the magnet 1022 is set as the attractive force, that is, F2 = △F. For another example, when the direct writing print head 101 moves in the horizontal direction, the first contact pressure F1 on the printed substrate is formed by other external forces, and the relative force △F generated by the electromagnet 1021 and the magnet 1022 is used to adjust F1.

[0044] When the direct writing print head 101 moves along the tilt angle direction, it is necessary to calculate the component force of gravity in this direction according to the specific angle.

[0045] In the above-mentioned embodiment of the present invention, the positions of the electromagnet 1021 and the magnet 1022 are set differently, and their force performances may also be different. For example, when the electromagnet 1021 is set below the magnet 1022 and exhibits an attractive force, the force on the direct writing print head 101 is manifested as a downward pulling force; and when the electromagnet 1021 is set above the magnet 1022 and also exhibits an attractive force, the force on the direct writing print head 101 is manifested as an upward pulling force. Therefore, the electromagnet 1021 and the magnet 1022 in the embodiment of the present invention can be set arbitrarily, and only the parameters need to be selected and calculated according to the position.

[0046] The direct-write print head 101 and the pressure control mechanism 102 in the printing device in this embodiment are implemented in a separate magnetic matching manner, which facilitates the loading and unloading and replacement of equipment parts and makes it easier to create a miniaturized printing device. At the same time, electromagnetic control can improve the control accuracy of the contact pressure between the direct-write print head 101 and the pressure control mechanism 102, thereby ensuring the overall effectiveness and stability of the printing device.

[0047] like Figure 3 , Figure 3 2 shows another embodiment of the printing device in the embodiment of the present invention, in which the printing device includes a mounting plate 201, a direct writing print head 202, a pressure adjustment mechanism 203 and a sliding mechanism 204; Figure 4 The sliding mechanism 204 includes a slide 2041 and a slider 2042. The slide 2041 of the sliding mechanism 204 is fixed on the mounting plate 201, and the direct writing print head 202 is fixed on the slider 2042, so as to realize vertical movement along the slide 2041; the printed substrate 205 is located below the direct writing print head 202. The pressure regulating mechanism 203 includes a first elastic member 2031, one end of the first elastic member 2031 is fixed on the direct writing print head 202, and is linked with the direct writing print head 202, and the other end of the first elastic member 2031 can be fixed on the mounting plate 201.

[0048] like Figure 5 (1) In this embodiment, the first elastic member 2031 may be a leaf spring. When the direct writing print head 202 is in the initial position (located above the printed substrate 205 and not in contact with the printed substrate 205), the leaf spring (first elastic member 2031) linked to the direct writing print head 202 is in a first deformation state, and forms an initial vertical force on the direct writing print head 202 (the first deformation state may be the original state of the leaf spring, that is, the deformation of the leaf spring is zero at this time, and the force on the direct writing print head 202 is zero); Figure 5(2) When the direct writing print head 202 falls and contacts the printed substrate 205, the gravity of the direct writing print head 202 completely constitutes the first contact pressure F1 between the direct writing print head 202 and the printed substrate 205, and the leaf spring linked to the direct writing print head 202 is in the second deformation state due to the displacement of the direct writing print head 202, and generates a vertical force △F on the direct writing print head 202. At this time, the actual contact pressure (second contact pressure) between the direct writing print head 202 and the printed substrate 205 is F2=F1+△F, and △F can be expressed as a vertical upward pulling force according to the setting position and setting direction of the leaf spring, that is, F2=F1-△F; △F can also be expressed as a vertical downward thrust, that is, F2=F1+△F.

[0049] In this embodiment, the deformation degree of the leaf spring after the direct writing print head 202 contacts the printed substrate 205 can be controlled to achieve a specific force on the direct writing print head 202, thereby controlling the actual contact pressure between the direct writing print head 202 and the printed substrate 205.

[0050] In some embodiments, the connection position of one end of the leaf spring (the outer end for the spring coil) on the direct writing print head 202 is adjustable, for example: a slide groove is provided on the outside of the direct writing print head 202, and a slide plate that can move in the slide groove is provided in the slide groove. After the slide plate moves to the specified position of the slide groove, it can be fixed by fasteners such as screws and bolts, and one end of the leaf spring is connected and fixed to the slide plate. Preferably, the slide groove can be a vertical slot, and the leaf spring can select a connection position along the vertical direction of the direct writing print head 202 through the slide plate. Based on this embodiment, the deformation degree of the leaf spring in the initial state can be controlled, so that the user can control the initial deformation state of the leaf spring by changing the position, thereby achieving the ultimate control purpose of the second contact pressure required by the user.

[0051] In some embodiments, the connection position of one end of the leaf spring (the inner end for the spring coil) on the mounting plate 201 is adjustable, and a matching structure of a slide slot and a slide sheet or a similar structure may be adopted, wherein the slide slot may be a linear slide slot or an arc-shaped slide slot. Another method is to connect the inner end of the leaf spring through a rotating mechanism, and change the initial deformation degree of the leaf spring by rotating, so as to realize the user's control of the force of the direct writing print head 202 through the pressure regulating mechanism 203, so that the second contact pressure between the direct writing print head 202 and the printed substrate 205 reaches the user's setting.

[0052] In some embodiments, the positions of both ends of the leaf spring are adjustable. The specific adjustment structure can be referred to the above embodiments and will not be described in detail here.

[0053] The rotating mechanism in this embodiment can be realized by a motor, which is beneficial to the automatic control of the printing device and has a simpler structural design.

[0054] Figure 6 Another embodiment of the printing device in the embodiment of the present invention is shown, in which the leaf spring is specifically a spring coil.

[0055] like Figure 7 In some embodiments, the first elastic member 2031 may also be an elastic rope, one end of which is tied to the outside of the direct writing print head 202, and the other end is tied to the mounting plate 201; preferably, the deformation direction of the elastic rope is parallel to the moving direction of the direct writing print head 202 (i.e., the elastic rope is arranged vertically). In some embodiments, the positions of the two ends of the elastic rope are adjustable. Preferably, the elastic rope can be adjusted by being tied to a rotating bolt fixed on the mounting plate 201. By rotating the rotating bolt, the elastic rope can be wound or loosened on the rotating bolt, and the force applied to the direct writing print head 202 can be increased or decreased by changing the force-bearing end (force-bearing length) of the elastic rope. In this embodiment, the deadweight of the direct writing print head 202 can be used as the first contact pressure F1, and the elastic rope is used to generate a vertical upward pulling force △F to offset the deadweight of the direct writing print head 202, and △F is less than F1, so that F2 = F1-△F. The printing device in this embodiment is suitable for adjustment in a range where the target contact pressure (ie, the second contact pressure) is smaller than the second contact pressure.

[0056] like Figure 8 In some embodiments, the first elastic member 2031 may also be a vertical spring, and its working principle is the same as that of the elastic rope embodiment. Its adjustable structure can be achieved by replacing the end position, which will not be described in detail here.

[0057] The mounting plate 201 in the embodiment of the present invention is an example of an assembly substrate for components in a printing device. In other embodiments, the mounting plate 201 may be a multi-piece structure with a fixed position, or other shapes, such as a columnar, sheet-like, block-like, or a shell structure, which is not limited here.

[0058] The contact and separation between the direct-write print head and the printed substrate in the above-mentioned embodiment of the printing device of the present invention can be realized by manual control or other automatic driving methods. The automatic driving method can use various methods such as motor drive and electromagnetic drive to make the direct-write print head linked.

[0059] Now refer to Fig. 9 , Fig. 9Another example of a printing device in an embodiment of the present invention is shown. The printing device in this example includes: a mounting plate 301, a direct writing print head 302, a pressure adjustment mechanism 303, a first sliding mechanism 304 and a driving mechanism 305; the direct writing print head 302 is mounted on the mounting plate 301 through the first sliding mechanism 304, and the driving mechanism 305 is mounted on the mounting plate 301 and forms a linkage structure with the direct writing print head 302; the pressure adjustment mechanism 303 can adopt any of the above structures that cooperate with the direct writing print head 302. The printed substrate 306 is located below the direct writing print head 302.

[0060] like Fig.10 In this embodiment, the driving mechanism 305 includes a connecting plate 3051 that is controlled by a power source (not shown in the figure) to move up and down, and a connecting rod 3052 that connects the direct writing print head 302 and the connecting plate 3051; the connecting rod 3052 is parallel to the moving direction of the direct writing print head 302; wherein, the connecting plate 3051 and the connecting rod 3052 are rigidly connected (or the connecting rod 3052 penetrates the end of the connecting plate 3051 and limits the maximum height of the connecting plate 3051 on the connecting rod 3052 through bolts), and the connecting rod 3052 and the direct writing print head 302 are slidably connected, and the direct writing print head 302 can move freely along the connecting rod 3052, so that the direct writing print head 302 has a certain amount of free movement on the connecting rod 3052. Specifically, a card table 3053 that cooperates with the direct writing print head 302 is provided on the outer side of the connecting rod 3052 to limit the lowest position of the direct writing print head 302 on the connecting rod 3052. The connection between the connecting rod 3052 and the connecting plate 3051 limits the highest position of the direct writing print head 302 on the connecting rod 3052 .

[0061] In this embodiment, the vertical movement distance S1 of the connecting plate 3051 is greater than the distance S2 between the direct writing print head 302 and the printed substrate 306, so that after the connecting plate 3051 drives the direct writing print head 302 to contact the printed substrate 306, the free movement amount on the connecting rod 3052 will not break the printed substrate 306, and the first contact pressure F1 between the direct writing print head 302 and the printed substrate 306 is completely formed by the gravity of the direct writing print head 302.

[0062] like Fig.11Preferably, the connecting plate 3051 of the driving mechanism 305 is assembled on the mounting plate 301 through the second sliding mechanism 307. The power source of the driving mechanism 305 adopts electromagnetic drive, and also includes: an electromagnet 3053 and a magnetic member 3054; when powered on, an attractive force is generated between the electromagnet 3053 and the magnetic member 3054, the magnetic member 3054 is fixed to the other end of the connecting plate 3051 away from the direct writing print head 302, and the electromagnet 3053 is assembled just above the magnetic member 3054; when the electromagnet 3053 In the power-on state, the direct writing print head 302 is in the initial position, and the distance between it and the printed substrate 306 is S2. When the power is turned off, the connecting rod 3051 and the magnetic member 3054 and the connecting rod 3053 thereon, as well as the direct writing print head 302 are free falling; wherein, the connecting plate 3051 drives the magnetic member 3054 and the connecting rod 3052 to fall by a distance S1, the falling distance of the direct writing print head 302 is S2, and the free movement amount of the direct writing print head 302 on the connecting rod 3052 is S1-S2. Preferably, the moving distance S1 of the connecting plate 3051 is limited by the second sliding mechanism 307.

[0063] like Fig.12 In another preferred embodiment, the driving mechanism 305 further includes: a reset spring 3055; the electromagnet 3053 is arranged below the magnetic member 3054, and the reset spring 3055 is arranged between the electromagnet 3053 and the magnetic member 3054. The printing device supports the connecting plate 3051 and the direct writing print head 302 in the initial position (the direct writing print head 302 does not contact the printed substrate 306) through the reset spring 3055. The reset elastic force of the reset spring 3055 should be greater than the gravity of the structures it supports. When the electromagnet 3053 is energized, the magnetic member 3054 is attracted, and the connecting plate 3051 tends to fall S1 under the action of the suction force, and the direct writing print head 302 falls freely S2 to contact the printed substrate 306. The free offset of the direct writing print head 302 on the connecting rod 3052 is S1-S2. When the power is turned off, the return spring 3055 connects the plate 3051 and the direct-write print head 302 to return to the initial position.

[0064] The return spring 3055 in this embodiment can be arranged at any position that can cooperate with the connecting plate 3051, for example, it can be arranged above the connecting plate 3051, with its top fixed on the clamping platform reserved on the mounting plate 301, and its bottom fixed on the connecting plate 3051. Alternatively, the return spring 3055 can be arranged below the connecting plate 3051, with its top against the connecting plate 3051, and its bottom against the clamping platform reserved on the mounting plate 301.

[0065] like Fig.13In other embodiments of the present invention, the power source of the driving mechanism 305 can be a two-stage electromagnet 3056, which has two coils with opposite magnetic properties, controlling a magnetic guide rod 3057 therein, one end of which is connected to the connecting plate 3051, and by energizing each coil to drive the movement of the magnetic guide rod 3057, the connecting plate 3051 is driven to continuously switch between two positions. In this embodiment, a return spring is not required.

[0066] When the pressure regulating mechanism 303 in the above embodiment adopts the structure of the first elastic member, the falling distance S2 of the direct writing print head 302 affects the deformation degree of the first elastic member, thereby causing the first elastic member to deform due to the falling distance S2 and act on the direct writing print head 302.

[0067] The power source of the driving mechanism 305 can also be a motor or other means to drive the movement of the connecting rod. However, the electromagnetic drive has a faster response and is more suitable for rapid manufacturing of printing equipment.

[0068] like Fig.14 In some embodiments, the printing device in the embodiment of the present invention further includes: a shock absorbing mechanism 308 cooperating with the direct writing print head 302 to reduce the impact generated when the direct writing print head 302 moves at the moment under the control of the driving mechanism 305.

[0069] Preferably, the shock absorbing mechanism 308 includes a second elastic member for eliminating the vibration offset caused by inertia of the direct writing print head 302 at the moment of movement. Specifically, the second elastic member can be sleeved outside the connecting rod 3052, with one end against the direct writing print head 302 and the other end against the connecting plate 3051. In some other embodiments, the second elastic member can also be connected to the direct writing print head 302 and the connecting plate 3051 at both ends. Preferably, the second elastic member can be a spring.

[0070] In some embodiments, when the direct writing print head 302 is in the printing position (contacting the printed substrate 306 with a second contact pressure), the second elastic member can be in a compressed state, a stretched state, or a non-deformed (original) state, and for the compressed state and the stretched state, the force exerted on the direct writing print head 302 is a set value. When the second elastic member is in a compressed state, the second contact pressure between the direct writing print head 302 and the printed substrate 306 is strengthened to a target value by the force of the second elastic member; when the second elastic member is in a stretched state, the second contact pressure between the direct writing print head 302 and the printed substrate 306 is weakened to a target value by the force of the second elastic member.

[0071] Now refer to Fig.15 , Fig.15Another example of a printing device in an embodiment of the present invention is shown. The printing device in this example includes: a mounting plate 301, a direct writing print head 302, a first sliding mechanism 304, a driving mechanism 305, a second sliding mechanism 307 and a damping mechanism 308; the direct writing print head 302 is mounted on the mounting plate 301 through the first sliding mechanism 304, and the driving mechanism 305 is mounted on the mounting plate 301 and forms a linkage structure with the direct writing print head 302; wherein the connecting plate 3051 of the driving mechanism 305 is fixed on the mounting plate 301 through the second sliding mechanism 307. The printed substrate 306 is located below the direct writing print head 302.

[0072] In this embodiment, the shock absorbing mechanism 308 can maintain a set compression state and tension state when the direct writing print head 302 is in the printing position, thereby achieving a target force on the direct writing print head 302. In this embodiment, there is no pressure adjustment mechanism, and the adjustment of the second contact pressure can be completed directly through the shock absorbing mechanism 308.

[0073] In this embodiment, the shock absorbing mechanism 308 can not only realize the shock absorbing and buffering effect on the direct writing print head 302, but also realize the adjustment of the second contact pressure, thereby saving equipment space and simplifying the printing equipment.

[0074] The direct-write print head in the printing device in the embodiment of the present invention may have a variety of feeding structures, such as a direct connection pipeline, which is suitable for liquid metal (low melting point metal) that always remains in a liquid state. In other embodiments, the direct-write print head may also realize the feeding of solid materials.

[0075] Now refer to Figure 16-17 , Figure 16-17 Another printing device in an embodiment of the present invention is shown, and the printing device includes: a mounting plate 301, a direct writing print head 302, a pressure regulating mechanism 303, a first sliding mechanism (blocked in the figure), a driving mechanism 305, a second sliding mechanism 307 and a shock absorbing mechanism 308, and in addition, it also includes: a print head fixing seat 309, a granular material feeding mechanism 310 and a granular material ink cartridge 311; wherein the print head fixing seat 309 is fixed on the mounting plate 301, and is sleeved outside the direct writing print head 302, Prevent the direct writing print head 302 from deviating during the vertical movement; a material inlet is provided at the top of the direct writing print head 302 and is exposed to the outside of the print head fixing seat 309; a granular material feeding mechanism 310 is fixed on the mounting plate 301 and is located above the direct writing print head 302, and a feeding parabola is formed between its material outlet and the material inlet of the direct writing print head 302; a granular material ink cartridge 311 is fixed above the granular material feeding mechanism 310 and is connected to the material inlet of the granular material feeding mechanism 310.

[0076] The particle material feeding mechanism 310 is an automatic feeding mechanism, and forms a closed-loop control with the ink volume in the direct writing print head 302. When the ink volume in the direct writing print head 302 is lower than a preset value, the particle material feeding mechanism 310 automatically feeds the particles.

[0077] The print head holder 309 has a heating component for heating and melting the granular material entering the direct writing print head 302 into a liquid state, thereby satisfying the ink output of the direct writing print head 302. The printing device in this embodiment is suitable for low melting point metals having a melting point higher than room temperature.

[0078] In other embodiments, the direct writing print head 302 is fixedly connected to the print head mounting seat 309, the print head mounting seat 309 is assembled on the mounting plate 301 via a first sliding mechanism 304, and the driving mechanism 305 drives the vertical movement of the print head mounting seat 309, thereby driving the displacement of the direct writing print head 302; wherein, a matching relationship is formed between the connecting rod 3052 of the driving mechanism 305 and the print head mounting seat 309, and the shock absorbing mechanism 308 acts on the connecting plate 3051 of the driving mechanism 305 and the print head mounting seat 309.

[0079] Reference Fig.18 , Fig.18 Another printing device in an embodiment of the present invention is shown. Fig.14 In the embodiment shown, the return spring 3055 of the driving mechanism 305 in the printing device is located between the connecting plate 3051 and the card table on the mounting plate, and forms a matching relationship.

[0080] Reference Fig.19 , Fig.19 Another printing device in an embodiment of the present invention is shown. Fig.14 In the illustrated embodiment, the reset spring 3055 of the driving mechanism 305 is omitted, and the direct writing print head 302 is reset by the spring of the pressure regulating mechanism, and then the connecting plate 3051 is reset by the damping mechanism 308 .

[0081] Reference Fig. 20 , Fig. 20 Another printing device in an embodiment of the present invention is shown. In the printing device, the power source of the driving mechanism 305 is provided by a double-stage electromagnet 3056 and a magnetic guide rod 3057.

[0082] In the above-mentioned embodiments of the present invention, the stable writing pressure of the direct writing print head can be provided by a pressure regulating mechanism, by a combination of the pressure regulating mechanism and the self-weight of the direct writing print head (or the direct writing print head with a print head fixing seat), by a combination of a shock absorbing mechanism and the self-weight of the direct writing print head (or the direct writing print head with a print head fixing seat), or by a combination of a shock absorbing mechanism and a pressure regulating mechanism, or by a combination of a shock absorbing mechanism, a pressure regulating mechanism and the self-weight of the direct writing print head (or the direct writing print head with a print head fixing seat).

[0083] Those skilled in the art will also appreciate that the various illustrative logic blocks, modules, circuits, and algorithmic steps described in conjunction with the embodiments herein can all be implemented as electronic hardware, computer software, or a combination thereof. In order to clearly illustrate the interchangeability between hardware and software, various illustrative components, blocks, modules, circuits, and steps are generally described above around their functions. Whether such functions are implemented as hardware or software depends on specific applications and the design constraints imposed on the entire system. A skilled person can implement the described functions in an alternative manner for each specific application, but such implementation decisions should not be interpreted as departing from the scope of protection of the present disclosure.

Claims

1. A printing device, characterized in that: include: Direct-write print heads are used to print on printed substrates by contact; a pressure adjustment mechanism cooperated with the direct-write print head, for adjusting a first contact pressure between the direct-write print head and the printed substrate to a second contact pressure; The direct-write print head performs printing operation on the printed substrate with the second contact pressure; A driving mechanism matched with the direct writing print head, used for driving the direct writing print head to move in a straight line direction, so as to control the direct writing print head to contact the printing substrate with the first contact pressure, or to separate from the printing substrate; A shock absorbing mechanism cooperated with the direct writing print head, used to reduce the impact generated when the direct writing print head moves under the control of the driving mechanism; The direct-write print head has a free amount of movement in its moving direction; The direct writing print head converts the reaction force generated at the moment of contacting the printing substrate into vibration displacement through the free movement amount to avoid rigid vibration; The damping mechanism includes a second elastic member for eliminating the vibration deviation of the direct-write print head.

2. The printing device according to claim 1, characterized in that: The pressure regulating mechanism comprises a first elastic member; one end of the first elastic member is linked to the direct writing print head, and the other end thereof is fixed; The first contact pressure between the direct writing print head and the printing substrate is adjusted to the second contact pressure by the deformation state and deformation amount of the first elastic member.

3. The printing device according to claim 2, characterized in that: The deformation direction of the first elastic member is parallel to the direction in which the direct writing print head contacts / leaves the printing substrate.

4. The printing device according to claim 2, characterized in that: The initial position of at least one end of the first elastic member is adjustable, so as to adjust the force exerted by the first elastic member on the direct writing print head by changing one or more of the deformation degree, deformation state and deformation direction of the first elastic member in the process of linkage with the direct writing print head.

5. The printing device according to claim 2 or 4, characterized in that: The first elastic member is an elastic rope or a spring.

6. The printing device according to claim 1, characterized in that: When the direct writing print head contacts the printing substrate, the second elastic member has a set deformation amount to form a force applied to the direct writing print head; The second contact pressure is a combination of the gravity of the direct writing print head, the force applied by the pressure regulating mechanism to the direct writing print head, and the force applied by the second elastic member to the direct writing print head.

7. The printing device according to claim 6, characterized in that: When the direct writing print head contacts the printing substrate, the deformation amount of the second elastic member is zero.

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