An ink delivery mechanism, a control method of an ink delivery mechanism, and a printer

Abstract

The application discloses an ink conveying mechanism, a control method of the ink conveying mechanism and a printer. The ink conveying mechanism comprises a body, an ink conveying element and a detection element. The body is provided with an ink conveying pipeline and a pump cavity in communication with the ink conveying pipeline. The ink conveying element is provided with a fixed element and a piston element. The fixed element is static relative to the body. The piston element is located in the pump cavity and is adapted to slide between a first position and a second position. The detection element is provided with a first conductive end and a second conductive end which are static relative to the body. The first conductive end is electrically connected with the fixed element. The second conductive end is also adapted to electrically contact with the piston element when the piston element moves to the first position, so that the first conductive end, the fixed element, the piston element and the second conductive end are sequentially electrically connected to form a loop. The detection element is adapted to output an electrical signal when the loop is formed. The detection method is simple, and the detection method does not need to realize detection through the blockage of a driving element, and can reduce the damage of the driving element.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of printing products, in particular to an ink conveying mechanism, a control method of the ink conveying mechanism and a printer. BACKGROUND

[0002] With the gradual popularization of inkjet printing equipment, the ink suction and ink pressing methods are diversified, among which the piston movement is completed by relying on a motor to realize the ink suction action, to complete the ink replenishment for each printing. After being used for a period of time, when the printing action is performed, the piston head is blocked and cannot move, or the ink supply is insufficient, which affects printing. SUMMARY

[0003] The present application aims to overcome the above-mentioned defects or problems in the background art, and provides an ink conveying mechanism, a control method of the ink conveying mechanism and a printer.

[0004] To achieve the above-mentioned purpose, the present application and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0005] Solution one, an ink conveying mechanism, comprising

[0006] a body provided with an ink conveying pipeline and a pump cavity in communication with the ink conveying pipeline; the ink conveying pipeline is provided with a one-way valve upstream and downstream of the position in communication with the pump cavity;

[0007] an ink conveying member having a fixed member and a piston member, the fixed member is stationary relative to the body, and the piston member is located in the pump cavity and is adapted to slide between a first position and a second position;

[0008] a detection member provided with a first conductive end and a second conductive end stationary relative to the body, the first conductive end is electrically connected with the fixed member;

[0009] the second conductive end is also adapted to be in electrical contact with the piston member when the piston member moves to the first position, so that the first conductive end, the fixed member, the piston member and the second conductive end are sequentially electrically connected to form a loop; the detection member is adapted to output an electrical signal when the loop is formed.

[0010] Solution two, based on solution one, the ink conveying member comprises a driving member;

[0011] the driving member is adapted to drive the piston member to move and is electrically connected with the piston member; the driving member has the fixed member; the driving member drives the piston member to move from the first position to the second position when the loop is formed.

[0012] Option three, based on option two, the first conductive end is located on the outside of the main body and is electrically connected to the outer wall of the driving member, an insertion port is provided on the outer wall of the main body, the insertion port is connected to the pump chamber, and the second conductive end is suitable for extending into the pump chamber through the insertion port to be electrically connected to the piston member.

[0013] Option 4, based on Option 3, the main body is provided with a first abutting surface and a second abutting surface opposite to each other and forming a gap; one end of the second conductive end is located on the first abutting surface, and the other end is provided with an elastic protrusion protruding toward the second abutting surface and abutting against the second abutting surface.

[0014] Option 5, based on Option 3, the detection member is also provided with a base, the two ends of the base are respectively electrically connected to the first conductive end and the second conductive end, the first conductive end is elastic and bent relative to the base to be suitable for applying elastic force to the outer wall of the driving member so as to press tightly against the outer wall of the driving member.

[0015] Option six, based on option three, the detection member includes a first conductive sheet, a circuit board, and a second conductive sheet electrically connected in sequence, and the circuit board and the first conductive sheet are located on the outside of the main body; the first conductive sheet forms the first conductive end, and the second conductive sheet is provided with the second conductive end, and the circuit board is suitable for controlling the operation of the driving member when forming a loop, so that the driving member drives the piston member to move from the first position to the second position.

[0016] Option seven, based on Option six, also includes a first fastener and a second fastener. The first conductive sheet is provided with a first through hole, and the first fastener is threadedly connected to the body after passing through the first through hole and the circuit board; the second conductive sheet is provided with a second through hole, and the second fastener is threadedly connected to the body after passing through the second through hole and the circuit board.

[0017] Option 8, based on Option 7, the main body is provided with a first limiting surface and a second limiting surface arranged opposite to each other, the first limiting surface and the second limiting surface are parallel to the extension direction of the first through hole, and there is an installation gap between the first limiting surface and the second limiting surface, the first conductive sheet is suitable for being placed in the installation gap and abutting against the outer wall of the driving member, and the two ends of the first conductive sheet are respectively suitable for abutting against the first limiting surface and the second limiting surface.

[0018] Solution 9, a method for controlling an ink delivery mechanism, based on the ink delivery mechanism described in any one of Solution 1 to Solution 8, comprising the following steps:

[0019] The control piston moves from the second position to the first position, and whether a loop is formed among the fixed part, the piston and the detection part is detected; if the loop is formed, the control piston moves from the first position to the second position; otherwise, the piston continues to move from the second position to the first position.

[0020] Scheme ten, a printer, comprising an ink feeding mechanism as described in any one of schemes one to eight.

[0021] From the above description of the present application and its preferred embodiments, relative to the prior art, the technical scheme of the present application and its preferred embodiments have the following beneficial effects due to the following technical means:

[0022] 1. The applicant knows through continuous observation, experiment and research that in the prior art, the reason for causing the technical problem of "insufficient ink supply, affecting printing" is that the position of the piston is not detected, which causes cumulative error after long-term movement of the piston, and finally causes the piston to be stuck when moving to the limit position, and the piston action cannot be performed; if controlled by software, the software control utilizes the feature that the current will change after the DC motor is blocked, and drives the piston to move to the limit position in one direction until the blockage to determine the "zero point" during reset, and the reset of the sliding part during shutdown or startup will cause the ink in the cavity to be pressed out, and finally the action of wiping the nozzle is required, which is relatively complicated, and the sliding part always retreating to the top blockage may also cause damage to the driving part.

[0023] In scheme one and its preferred embodiments, an ink feeding mechanism comprises a body, an ink feeding part and a detection part.

[0024] The body is provided with an ink feeding pipeline for ink feeding and ink discharging; the body is further provided with a pump cavity in communication with the ink feeding pipeline, and the piston of the ink feeding part is located in the pump cavity and is adapted to slide between the first position and the second position to feed the ink feeding pipeline, that is, the volume of the pump cavity is changed to realize vacuum ink suction and extrusion ink discharge, so as to realize ink feeding and ink discharging of the ink feeding pipeline. And the ink feeding pipeline is provided with a one-way valve upstream and downstream of the communication position with the pump cavity to prevent backflow.

[0025] The detecting member is provided with a first conductive end and a second conductive end which are stationary relative to the body, the two ends of the first conductive end are electrically connected with the second conductive end and the fixing member respectively, the other end of the second conductive end is also adapted to electrically contact with the piston member when the piston member moves to the first position, when the piston member does not slide to the first position, only the second conductive end, the first conductive end, the fixing member and the piston member are electrically connected, and no loop is formed. The second conductive end is adapted to electrically contact with the piston member when the piston member moves to the first position, so that the first conductive end, the fixing member, the piston member and the second conductive end are electrically connected in sequence to form a loop; the detecting member is adapted to output an electrical signal when the loop is formed, that is, to realize "zero return", so as to detect the position of the piston member. The detection method is simple, and the detection method does not need to realize detection through the blockage of the driving member, and can also reduce the damage of the driving member.

[0026] 2、In the second scheme and the preferred embodiments thereof, when the loop is formed, the piston member moves from the first position to the second position, so that the piston member can be accurately moved to the second position, the reliability and accuracy of the piston member are ensured, and the piston member is prevented from moving in the original direction when being located at the first position, so as to avoid damage.

[0027] In addition to driving the piston member, the driving member also forms the fixing member and has the function of electrical conduction, without the need to additionally set a conductive structure, and the structure is more simple and convenient.

[0028] 3、In the third scheme and the preferred embodiments thereof, the first conductive end is located on the outside of the body and is electrically connected with the outer wall of the driving member, the body is provided with a placing opening on the outer wall, the placing opening is communicated with the pump cavity, and the second conductive end is adapted to extend into the pump cavity through the placing opening to be electrically connected with the piston member, only part of the second conductive end extends into the pump cavity, and the rest of the detecting member is located on the outside of the body. In this way, the electrical connection between the detecting member and the driving member can be realized without the need to be in the narrow pump cavity, the installation is more convenient, and when the detecting member is completely installed in the pump cavity, the volume of the pump cavity is larger, resulting in a larger volume of the body, and when only part of the detecting member extends into the pump cavity, the volume of the body changes correspondingly and is not obvious, and the outer wall of the body is allowed to be machined to form a displacement groove, so that the volume of the ink delivery mechanism is reduced, the installation of other parts of the printer is facilitated, and the volume of the printer is ultimately reduced.

[0029] 4. In the fourth embodiment and its preferred embodiment, the body is provided with a first abutting surface and a second abutting surface that are opposed to each other and spaced apart. One end of the second conductive end is seated on the first abutting surface, and the other end is provided with an elastic protrusion that protrudes toward and abuts the second abutting surface. During installation, the elastic protrusion is deformed by pressure and, through elastic force, clamps the second conductive end between the first and second limiting surfaces, facilitating installation. Furthermore, the provision of the elastic protrusion compensates for the excessive spacing between the first and second abutting surfaces due to errors, causing the second conductive end to move up and down. This can result in uncontrollable contact between the piston and the second conductive end, affecting the ink supply volume and ink supply accuracy. Furthermore, the movement of the second conductive end may directly contact the driver, forming an erroneous circuit. The driver, which receives the erroneous circuit information and begins operating, may be damaged. Furthermore, if the second position is upward relative to the first position and the elastic protrusion is also upward, the elastic protrusion can also provide a certain buffering effect.

[0030] 5. In scheme five and its preferred embodiments, the detection member is further provided with a base, and the two ends of the base are electrically connected to the first conductive end and the second conductive end respectively. The first conductive end is elastic and bends relative to the base so as to be suitable for applying elastic force to the outer wall of the driving member to press tightly against the outer wall of the driving member. Through the elastic force of the first conductive end, the first conductive end and the driving member can be kept electrically connected and not easily detached, thereby ensuring stability during use. Moreover, compared with connecting the first conductive end to the outer wall of the driving member and then screwing the two together to achieve electrical connection between the two, there is no need to drill holes in the driving member, and assembly is also simpler. Of course, in other embodiments, the first conductive end can be connected to the outer wall of the driving member and then screwed together to achieve electrical connection between the two, or a wire connection method can be used.

[0031] 6. Option 6 and its preferred embodiment, the detection element includes a first conductive sheet, a circuit board, and a second conductive sheet electrically connected in sequence, with the circuit board and the first conductive sheet located outside the body; the first conductive sheet forms a first conductive end, and the second conductive sheet has a second conductive end. The circuit board is adapted to control the operation of the driver when a circuit is formed, so that the driver drives the piston from the first position to the second position. Since the circuit board used to control the operation of the driver is generally fragile and not suitable for being pressed by the piston, damage would result in loss of function. However, the second conductive sheet, which serves only as a conductor, would not be affected by impacts and would not affect the overall function. Furthermore, the first and second conductive sheets can be made of materials with good machinability, allowing installation even when the outer wall of the body is complex or the location of the driver is difficult. Furthermore, through this method, the detection element can be made thinner, occupying less space than the detection probe, switch, etc., thereby reducing the space occupied by the entire ink supply mechanism. This also allows the printer to be more compact when the ink supply mechanism is subsequently applied to the printer.

[0032] 7. In Scheme 7 and its preferred embodiment, the first conductive sheet is provided with a first through hole, and the first fastener is passed through the first through hole and the circuit board and then screwed to the body; the second conductive sheet is provided with a second through hole, and the second fastener is passed through the second through hole and the circuit board and then screwed to the body. In this way, the detection part and the body are fixed, preventing the detection part from shifting during use and affecting use.

[0033] 8. In scheme eight and its preferred embodiment, when the first fastener becomes loose during use, the first conductive sheet is likely to rotate around the axis of the first through-hole, which may cause the first conductive sheet to lose contact with the outer wall of the driving member, causing the circuit to be disconnected and the corresponding function to be unusable. In this scheme, the main body is provided with a first limiting surface and a second limiting surface that are relatively set. The first limiting surface and the second limiting surface are parallel to the extension direction of the first through-hole, and there is an installation gap between the first limiting surface and the second limiting surface. The first conductive sheet is suitable for being placed in the installation gap and abutting against the outer wall of the driving member, and the two ends of the first conductive sheet are respectively suitable for abutting against the first limiting surface and the second limiting surface, thereby preventing the first conductive sheet from rotating.

[0034] 9. In the ninth solution and its preferred embodiment, based on the above-mentioned ink delivery mechanism, a control method of the ink delivery mechanism includes the following steps:

[0035] The piston is controlled to move from the second position to the first position, and a circuit is detected between the fixed member, the piston member, and the detection member. If a circuit is formed, the piston is controlled to move from the first position to the second position; otherwise, the piston is continued to move from the second position to the first position. This ensures that the piston moves accurately to the second position, ensuring the reliability and accuracy of the piston movement, while preventing the piston from moving in the original direction when in the first position, which could cause damage.

[0036] 10. Option 10 and its preferred embodiments include the above-mentioned ink supply mechanism and have the beneficial effects brought by the above-mentioned ink supply mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 A three-dimensional diagram of the ink supply assembly in Example 1 from one perspective;

[0039] Figure 2 A three-dimensional diagram of the ink supply assembly in Example 1 from another perspective;

[0040] Figure 3Structure diagram of the ink supply assembly in Embodiment One;

[0041] Figure 4 Structure diagram of the housing in Embodiment One;

[0042] Figure 5 Structure diagram of the guide rod sleeve in Embodiment One;

[0043] Figure 6 Structure diagram of the detection member in Embodiment One;

[0044] Figure 7 Structure diagram of the printer in Embodiment Two.

[0045] Explanation of main reference signs:

[0046] Body 1, housing 11, mounting groove 111, mounting cavity 112, ink supply pipeline 113, guide rod sleeve 12, first sliding hole 121, second abutting surface 122, first limiting surface 123, second limiting surface 124, mounting gap 125, shaft sleeve 13, second sliding hole 131, first abutting surface 132, inlet 14, piston member 2, transmission member 21, piston head 22, driving member 3, detection member 4, first conductive sheet 41, base 411, first through hole 4111, first conductive end 412, circuit board 42, second conductive sheet 43, first part 431, second through hole 4311, second part 432, second conductive end 433, elastic protrusion 4331, first fastener 5, second fastener 6. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are preferred embodiments of the present application, and should not be regarded as exclusive to other embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0048] In the claims, specification, and above drawings of the present application, unless otherwise explicitly defined, the terms such as “first”, “second”, or “third” are used only to distinguish different objects, and are not used to describe a specific sequence.

[0049] In the claims, the specification, and the drawings of the present application, terms such as "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", and the like are used herein for convenience and are not intended to imply or create specific orientations of the application or specific orientations of the various elements thereof. It is to be understood that the foregoing terms are to be construed as referring to the orientation as shown in the drawings under discussion and are used for purposes of description in conjunction with the illustrative embodiments shown in the drawings as prior art and not limiting the present application in scope or spirit.

[0050] In the claims, the specification, and the drawings of the present application, unless otherwise expressly specified, terms such as "fixedly connected" or "fixedly connected" are to be construed as broadest possible connection, that is, any connection without relative movement between the connected parts and without relative rotation between the connected parts, that is, including non-detachable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or elements.

[0051] In the claims, the specification, and the drawings of the present application, the terms "including", "having" and their variants are intended to mean "including but not limited to".

[0052] Reference Figures 1-6 A printer includes an ink delivery mechanism, an inkjet head, an ink container, etc. The ink delivery mechanism includes a body 1, an ink delivery member, a detection member 4, a first fastener 5, and a second fastener 6.

[0053] The body 1 is used to mount the ink delivery member and the detection member 4. In this embodiment, the body 1 is made of a non-conductive material to prevent mutual interference and affect use by conducting electricity with other components in the use environment. Reference Figures 1-4 The body 1 includes a housing 11, a guide rod sleeve 12, and a shaft sleeve 13, reference Figure 3 、 Figure 4 The housing 11 is provided with a mounting groove 111, a mounting cavity 112, and an ink delivery pipe 113. The mounting groove 111 has three notches, which are respectively provided at the upper, front and left parts of the housing 11. The mounting cavity 112 is upwardly open at the groove bottom of the mounting groove 111, and the lower end of the mounting cavity 112 is in communication with the ink delivery pipe 113. Reference Figure 5The guide rod sleeve 12 is provided with a first sliding hole 121, and a second abutting surface 122 is formed on the surface of the guide rod sleeve 12 facing the ink duct 113. The upper end of the guide rod sleeve 12 is attached to the plane where the upper notch of the mounting groove 111 is located and is fixed to the shell 11. During installation, the part of the guide rod sleeve 12 with the first sliding hole 121 is adapted to extend into the mounting groove 111. The guide rod sleeve 12 is further provided with a first limiting surface 123 and a second limiting surface 124 arranged oppositely, the first limiting surface 123 and the second limiting surface 124 are parallel to the up-down direction, and the first limiting surface 123 and the second limiting surface 124 have an installation gap 125 therebetween.

[0054] With reference to Figure 3 The shaft sleeve 13 is installed in the mounting cavity 112, and the shaft sleeve 13 is provided with a second sliding hole 131 in communication with the ink duct 113. The second sliding hole 131 is in communication with the first sliding hole 121 to form a pump cavity, and the pump cavity is in communication with the ink duct 113. The ink duct 113 is provided with a one-way valve upstream and downstream of the position in communication with the pump cavity. Figure 1 The shaft sleeve 13 is arranged in a spaced manner with the guide rod sleeve 12 to form a placement inlet 14, the placement inlet 14 is in communication with the pump cavity, the placement inlet 14 faces the notch at the front end of the mounting groove 111, and the placement inlet 14 is located on the outer wall of the body 1. The shaft sleeve 13 is provided with a first abutting surface 132 facing the guide rod sleeve 12, the first abutting surface 132 and the second abutting surface 122 are opposite to each other and form a gap, and the placement inlet 14 is in communication with the gap between the first abutting surface 132 and the second abutting surface 122.

[0055] The ink delivery member includes a fixed member and a piston member 2, the fixed member is stationary relative to the body 1, and the piston member 2 is sealed with the pump cavity and repeatedly slides between the first position and the second position to make the ink duct 113 deliver ink; in this embodiment, since the shaft sleeve 13 can be machined separately, the machining precision of the inner wall of the second sliding hole 131 can be better controlled, thereby ensuring the smoothness and sealing performance of the piston member 2 of the ink delivery member when sliding, and compared with directly machining the mounting cavity 112 with the same precision, the cost is lower. Of course, in other embodiments, the shaft sleeve 13 can not be arranged, and the piston member 2 is directly in sliding cooperation with the mounting cavity 112, and in this embodiment, the mounting cavity 112 is a component part of the pump cavity.

[0056] With reference to Figure 3 The piston member 2 is placed in the pump cavity and is adapted to slide between the first position and the second position to make the ink duct 113 deliver ink, i.e. to take ink from the ink container and deliver it to the inkjet head for printing. The piston member 2 includes a transmission member 21 and a piston head 22 which are electrically conductive and fixed to each other, the transmission member 21 is adapted to slide in the first sliding hole 121 and is in rotation-stopping cooperation with the first sliding hole 121. The piston head 22 is adapted to slide in the second sliding hole 131 and is in sealing cooperation with the hole wall of the second sliding hole 131 to prevent ink leakage. The piston head 22 is the piston member.

[0057] The ink feeding member comprises a driving member 3 which is mounted on the body 1. The driving member 3 is adapted to drive the piston member 2 to move, and the piston member 2 is electrically connected with the driving member 3. In the embodiment, the driving member 3 is a rotary motor, and the output end of the driving member 3 is a screw rod which is screwed with a transmission member 21. Since the transmission member 21 is also in stopper cooperation with the first sliding hole 121, when the screw rod rotates, the transmission member 21 moves along the up-down direction, thereby driving the piston head 22 to move along the up-down direction. In the embodiment, the outer wall of the driving member 3 (i.e. the shell) forms the fixing member. Of course, in other embodiments, an additional conductive structure can be provided as the fixing member. The driving member 3 does not have the fixing member, and in the embodiment, the driving member 3 can only be used to drive the piston member 2 to slide. In the embodiment, the fixing member refers to an object which is fixed relative to the body 1 and can be in electrical connection with the piston member 2 and the detecting member 4.

[0058] With reference to Figure 6 The detecting member 4 comprises a first conductive sheet 41, a circuit board 42 and a second conductive sheet 43 which are electrically connected in sequence. The circuit board 42 and the first conductive sheet 41 are located on the outside of the body 1. Specifically, the first conductive sheet 41 is provided with a base portion 411 and a first conductive end 412 which is connected with the base portion 411 and has elasticity, and the two portions are substantially L-shaped. The base portion 411 is provided with a first through hole 4111 which extends along the up-down direction. The first fastening member 5 penetrates the first through hole 4111 and the circuit board 42, and is then screwed with the body 1. In the embodiment, with reference to Figure 1 The first fastening member 5 penetrates the first through hole 4111, the circuit board 42 and the guide rod sleeve 12 in sequence, and is then connected with the shell 11. The first conductive end 412 is electrically connected with the driving member 3 and is stationary relative to the body 1. The first conductive end 412 is bent relative to the base portion 411 to be adapted to apply an elastic force to the outer wall of the driving member 3 to abut against the outer wall of the driving member 3. The outer wall of the driving member 3 is adapted to be conductive, so that the first conductive end 412 is electrically connected with the outer wall of the driving member 3. Of course, in other embodiments, the detecting member 4 can be electrically connected with the outer wall of the driving member 3 through other manners. In the embodiment, the first conductive end 412 is also placed in the mounting gap 125, and the two ends of the first conductive end 412 are adapted to abut against the first limiting surface 123 and the second limiting surface 124 respectively.

[0059] The circuit board 42 is located on the upper end of the guide rod sleeve 12, and is used to control the driving member 3 when a loop is formed. In other embodiments, the detecting member 4 can only be made of conductive material without control function.

[0060] The second conductive sheet 43 is provided with a second conductive end 433 which is stationary relative to the body 1 and is electrically connected to the first conductive end 412 at one end, and the other end of the second conductive end 433 is adapted to be in electrical contact with the piston member 2 when the piston member 2 is moved to the first position. Specifically, the second conductive sheet 43 comprises a first portion 431, a second portion 432 and the second conductive end 433 connected in sequence, the first portion 431 is horizontally arranged and seated on the circuit board 42, and the first portion 431 is provided with a second through hole 4311, and the second fastener 6 is screwed with the body 1 after penetrating through the second through hole 4311 and the circuit board 42. Figure 1 The second portion 432 is vertically arranged, the second portion 432 connects the first portion 431 and the second conductive end 433, and the second conductive end 433 is substantially horizontally arranged. The second conductive end 433 is seated on the groove bottom of the mounting groove 111 and the first abutting surface 132, and the other end is provided with an elastic protrusion 4331 protruding towards the second abutting surface 122 and abutting against the second abutting surface 122. The second conductive end 433 is extended into the pump cavity from the inlet 14 to be electrically connected with the piston member 2, when the piston member 2 is slid to the first position, the piston head 22 is in contact with the second conductive end 433 to be electrified, so that the driving member 3, the piston member 2 and the detection member 4, the driving member 3 are sequentially electrically connected to form a loop, and the driving member 3 drives the piston member 2 to move from the first position to the second position when the loop is formed. The two movements of the driving member 3 driving the piston member 2 can be controlled by one control board or two control boards respectively, which is not limited here.

[0061] The power supply module supplies power to the loop, and the power supply module can be placed at any position in the loop to ensure that the loop can be electrified.

[0062] Referring to Figures 1-3 During installation, the shaft sleeve 13 is installed in the mounting cavity 112 of the shell 11 and sealed, then the piston head 22 is placed in the second sliding hole 131 of the shaft sleeve 13 and sealed, the guide rod sleeve 12 is installed on the shell 11, part of the guide rod sleeve 12 extends into the mounting groove 111 and forms a gap with the shaft sleeve 13, then the second conductive end 433 extends from the outside of the shell 11 into the gap between the guide rod sleeve 12 and the shaft sleeve 13, and during installation, the elastic protrusion 4331 is deformed under pressure and is clamped between the first limiting surface 123 and the second limiting surface 124 by elastic force. Then the circuit board 42 is placed on the guide rod sleeve 12, and the first conductive sheet 41, the circuit board 42 and the guide rod sleeve 12 are fixedly connected with the shell 11 by the first fastener 5. The second conductive sheet 43 and the circuit board 42 are fixedly connected with the shell 11 by the second fastener 6. Then the transmission member 21 extends into the first sliding hole 121 and penetrates through the second conductive end 433 to be screwed with the piston head 22 in the second sliding hole 131. Finally, the motor is installed, and the first conductive end 412 is abutted against the outer wall of the motor to realize electrical connection.

[0063] In use, the control driving member 3 is started to drive the piston member 2 to move from the second position to the first position, in the process, whether a loop is formed among the driving member 3 (the fixed member), the piston member 2 (the piston member) and the second conductive end 433, the first conductive end 412 and the driving member 3 (the fixed member) is detected; if the loop is formed, the piston member 2 is controlled to move from the first position to the second position; otherwise, the piston member 2 is continuously controlled to move from the second position to the first position.

[0064] Compared with the prior art, the embodiment has the following beneficial effects.

[0065] In an exemplary embodiment, an ink feeding mechanism comprises a body 1, an ink feeding member, a detection member 4;

[0066] The body 1 is provided with an ink feeding pipeline 113 for ink feeding and discharging; the body 1 is further provided with a pump cavity in communication with the ink feeding pipeline 113, and the piston member 2 of the ink feeding member is located in the pump cavity and is adapted to slide between the first position and the second position to feed the ink feeding pipeline 113, i.e. by changing the volume of the pump cavity to realize vacuum ink suction and extrusion ink discharge, so as to realize the ink feeding and discharging of the ink feeding pipeline 113. And the ink feeding pipeline 113 is respectively provided with a one-way valve upstream and downstream of the position in communication with the pump cavity to prevent backflow.

[0067] The detection member 4 is provided with a first conductive end and a second conductive end which are static relative to the body, two ends of the first conductive end are respectively electrically connected with the second conductive end and the fixed member, and the other end of the second conductive end is further adapted to be in electrical contact with the piston member 2 when the piston member 2 moves to the first position, when the piston member 2 does not slide to the first position, only the second conductive end 433, the first conductive end 412, the fixed member and the piston member 2 are electrically connected, and no loop is formed. The second conductive end 433 is adapted to be in electrical contact with the piston member 2 when the piston member 2 moves to the first position, so as to sequentially electrically connect the first conductive end 412, the fixed member, the piston member 2 and the second conductive end 433 to form a loop; the detection member 4 is adapted to output an electrical signal when the loop is formed, i.e. to realize "zeroing", so as to detect the position of the piston member 2. The detection method is simple, and the detection method does not need to realize detection through the locked-rotor of the driving member, and can reduce the damage of the driving member.

[0068] In an exemplary embodiment, when the loop is formed, the piston member 2 moves from the first position to the second position, so as to ensure that the piston member 2 accurately moves to the second position, ensure the reliability and accuracy of the movement of the piston member 2, and avoid the piston member 2 from moving in the original direction when located at the first position, which leads to damage.

[0069] In addition to driving the piston member 2, the driving member 3 also forms a fixed member and has a conductive function, without the need to additionally set a conductive structure, so that the structure is more simple and convenient.

[0070] In an exemplary embodiment, the first conductive end 412 is located outside the body 1 and is electrically connected to the outer wall of the driving member 3. The outer wall of the body 1 is provided with a placing opening 14, which is in communication with the pump cavity. The second conductive end 433 is adapted to extend into the pump cavity through the placing opening 14 to be electrically connected to the piston member 2. Only part of the second conductive end 433 extends into the pump cavity, and the rest of the detection member 4 is outside the body 1. In this way, the electrical connection between the detection member 4 and the driving member 3 can be achieved without being in the narrow pump cavity, which is more convenient to install. When the detection member 4 is completely installed in the pump cavity, the volume of the pump cavity is larger, resulting in a larger volume of the body 1. When only part of the detection member 4 extends into the pump cavity, the volume of the body 1 changes correspondingly and is not obvious, and the outer wall of the body 1 is machined to form a recess, which reduces the volume of the ink delivery mechanism and facilitates the installation of other parts of the printer, and finally achieves the effect of reducing the volume of the printer.

[0071] In an exemplary embodiment, the body 1 is provided with a first abutting surface 132 and a second abutting surface 122 which are opposite to each other and form a gap. One end of the second conductive end 433 is located on the first abutting surface 132, and the other end is provided with an elastic protrusion 4331 which protrudes towards the second abutting surface 122 and abuts against the second abutting surface 122. During installation, the elastic protrusion 4331 is deformed under pressure and is held between the first limiting surface 123 and the second limiting surface 124 by the elastic force, so as to facilitate installation. In addition, when the gap between the first abutting surface 132 and the second abutting surface 122 is too large due to errors, the second conductive end 433 will move up and down, which will result in uncontrollable contact between the piston member 2 and the second conductive end 433, affecting the ink supply amount and precision. In addition, the second conductive end 433 may directly contact the driving member 3 after moving, forming an incorrect circuit, and the driving member 3 receiving the incorrect circuit information may be damaged. Furthermore, if the second position is upward relative to the first position, and the elastic protrusion 4331 is also upward, the elastic protrusion 4331 can also play a certain buffering role.

[0072] In an exemplary embodiment, the detection member 4 is further provided with a base 411, two ends of the base 411 are respectively electrically connected with the first conductive end 412 and the second conductive end 433, the first conductive end 412 is elastic and is bent relative to the base 411 to be suitable for applying an elastic force to the outer wall of the driving member 3 to tightly abut against the outer wall of the driving member 3, through the elastic force of the first conductive end 412, the state that the first conductive end 412 and the driving member 3 are electrically connected can be maintained without easily being separated, the stability during use is ensured, and compared with the way that the first conductive end 412 and the outer wall of the driving member 3 are connected and then the two are connected through screws, the electrical connection of the two is realized, the driving member 3 does not need to be punched, and the assembly is also simpler; of course, in other embodiments, the way that the first conductive end 412 and the outer wall of the driving member 3 are connected and then the two are connected through screws, the electrical connection of the two is realized, or the way that the two are connected through wires can be adopted.

[0073] In an exemplary embodiment, the detection member 4 includes a first conductive sheet 41, a circuit board 42 and a second conductive sheet 43 which are electrically connected in sequence, the circuit board 42 and the first conductive sheet 41 are located on the outside of the body 1; the first conductive sheet 41 forms the first conductive end 412, the second conductive sheet 43 is provided with the second conductive end 433, and the circuit board 42 is suitable for controlling the driving member 3 to work when a loop is formed, so that the driving member 3 drives the piston member 2 to move from the first position to the second position; since the circuit board 42 for controlling the driving member 3 to work is usually relatively fragile and is not suitable for being pressed by the piston member 2, if damaged, the function is lost, and only the second conductive sheet 43 for conducting electricity is impacted, which does not affect the overall use. Moreover, the first conductive sheet 41 and the second conductive sheet 43 can be made of materials with better processability, so that when the outer wall of the body 1 is complex or the position of the driving member 3 is tricky, installation can also be realized. Moreover, through this way, the detection member can usually be processed thinner, and the space occupied by the detection probe, switch and the like is smaller, so that the space occupied by the entire ink feeding mechanism is smaller, and the subsequent application of the ink feeding mechanism to the printer makes the printer more compact. In other embodiments, the detection member can also be composed of a detection probe, a switch and the like.

[0074] In an exemplary embodiment, the first conductive sheet 41 is provided with a first through hole 4111, the first fastener 5 penetrates through the first through hole 4111 and the circuit board 42 and is screwed with the body 1; the second conductive sheet 43 is provided with a second through hole 4311, the second fastener 6 penetrates through the second through hole 4311 and the circuit board 42 and is screwed with the body 1, the fixation of the detection member 4 and the body 1 is realized through this way, and the deviation of the detection member 4 during use is prevented from affecting the use.

[0075] In an exemplary embodiment, when the first fastener 5 is loosened during use, the first conductive sheet 41 is prone to rotate around the axis of the first through hole 4111, which may result in the first conductive sheet 41 not being in contact with the outer wall of the driving member 3, so that the circuit is disconnected and the corresponding function cannot be used. The body 1 is provided with the oppositely arranged first limiting surface 123 and second limiting surface 124, which are parallel to the extension direction of the first through hole 4111, and the first limiting surface 123 and the second limiting surface 124 have a mounting gap 125 therebetween. The first conductive sheet 41 is adapted to be placed in the mounting gap 125 and abut against the outer wall of the driving member 3, and the two ends of the first conductive sheet 41 are adapted to abut against the first limiting surface 123 and the second limiting surface 124, respectively, so as to prevent the first conductive sheet 41 from rotating.

[0076] In an exemplary embodiment, based on the above-mentioned ink feeding mechanism, a control method of the ink feeding mechanism includes the following steps:

[0077] The piston member is controlled to move from the second position to the first position, and whether a circuit is formed among the fixed member, the piston member and the detection member 4 is detected. If the circuit is formed, the piston member is controlled to move from the first position to the second position. Otherwise, the piston member is continuously controlled to move from the second position to the first position. In this way, the piston member can be accurately moved to the second position, the reliability and accuracy of the movement of the piston member are ensured, and the piston member is prevented from moving in the original direction when being located at the first position, thereby avoiding damage.

[0078] In an exemplary embodiment, the above-mentioned ink feeding mechanism is included, and the beneficial effects brought by the above-mentioned ink feeding mechanism are also included.

[0079] The above description and embodiment of the specification are used to explain the protection scope of the present application, but do not constitute a limitation on the protection scope of the present application. Through the inspiration of the present application or the above-mentioned embodiment, the modification, equivalent replacement or other improvement of the embodiment of the present application or part of the technical features thereof, which can be obtained by the ordinary skilled in the art combining with the common knowledge, the ordinary technical knowledge in the art and / or the prior art, through logical analysis, reasoning or limited test, should be included in the protection scope of the present application.

Claims

1. An ink delivery mechanism, characterized in that: include A main body (1) is provided with an ink delivery pipe (113) and a pump chamber connected to the ink delivery pipe (113); the ink delivery pipe (113) is provided with a one-way valve upstream and downstream of a position connected to the pump chamber; An ink delivery member comprising a conductive fixing member and a piston member (2), wherein the fixing member is stationary relative to the body (1), and the piston member (2) is located in the pump chamber and is adapted to slide between a first position and a second position; a detection member (4) provided with a first conductive end (412) and a second conductive end (433) stationary relative to the body (1), the first conductive end (412) being electrically connected to the fixing member; The second conductive end (433) is further adapted to electrically contact the piston member (2) when the piston member (2) moves to the first position, so that the first conductive end (412), the fixing member, the piston member (2) and the second conductive end (433) are electrically connected in sequence to form a loop; the detection member (4) is adapted to output an electrical signal when the loop is formed; The ink supply member includes a driving member (3); The driving member (3) is suitable for driving the piston member (2) to move and is electrically connected to the piston member (2); the driving member (3) has the fixing member; when the driving member (3) forms the circuit, it drives the piston member (2) to move from the first position to the second position.

2. An ink delivery mechanism according to claim 1, characterized in that: The first conductive end (412) is located outside the body (1) and is electrically connected to the outer wall of the driving member (3). An insertion port (14) is provided on the outer wall of the body (1), and the insertion port (14) is communicated with the pump chamber. The second conductive end (433) is suitable for extending from the insertion port (14) into the pump chamber to be electrically connected to the piston member (2).

3. An ink delivery mechanism according to claim 2, characterized in that The body (1) is provided with a first abutting surface (132) and a second abutting surface (122) which are opposite to each other and form a gap; one end of the second conductive end (433) is located on the first abutting surface (132), and the other end is provided with an elastic protrusion (4331) which protrudes toward the second abutting surface (122) and abuts against the second abutting surface (122).

4. An ink delivery mechanism according to claim 2, characterized in that The detection member (4) is further provided with a base (411), the two ends of the base (411) being electrically connected to the first conductive end (412) and the second conductive end (433) respectively, and the first conductive end (412) is elastic and bends relative to the base (411) so as to be suitable for applying an elastic force to the outer wall of the driving member (3) so as to be tightly pressed against the outer wall of the driving member (3).

5. An ink delivery mechanism according to claim 2, characterized in that: The detection member (4) comprises a first conductive sheet (41), a circuit board (42), and a second conductive sheet (43) which are electrically connected in sequence. The circuit board (42) and the first conductive sheet (41) are located outside the body (1); the first conductive sheet (41) forms the first conductive end (412), and the second conductive sheet (43) is provided with the second conductive end (433). The circuit board (42) is suitable for controlling the operation of the driving member (3) when a loop is formed, so that the driving member (3) drives the piston member (2) to move from the first position to the second position.

6. An ink delivery mechanism according to claim 5, characterized in that: The invention also includes a first fastener (5) and a second fastener (6), wherein the first conductive sheet (41) is provided with a first through hole (4111), and the first fastener (5) is screwed to the body (1) after passing through the first through hole (4111) and the circuit board (42); and the second conductive sheet (43) is provided with a second through hole (4311), and the second fastener (6) is screwed to the body (1) after passing through the second through hole (4311) and the circuit board (42).

7. An ink delivery mechanism according to claim 6, characterized in that: The body (1) is provided with a first limiting surface (123) and a second limiting surface (124) which are arranged opposite to each other. The first limiting surface (123) and the second limiting surface (124) are parallel to the extension direction of the first through hole (4111). There is an installation gap (125) between the first limiting surface (123) and the second limiting surface (124). The first conductive sheet (41) is suitable for being placed in the installation gap (125) and abutting against the outer wall of the driving member (3), and the two ends of the first conductive sheet (41) are respectively suitable for abutting against the first limiting surface (123) and the second limiting surface (124).

8. A method for controlling an ink delivery mechanism, characterized in that: An ink delivery mechanism according to any one of claims 1 to 7, comprising the following steps: The piston member (2) is controlled to move from the second position to the first position, and whether a circuit is formed between the fixing member, the piston member (2) and the detection member (4) is detected; if a circuit is formed, the piston member (2) is controlled to move from the first position to the second position; otherwise, the piston member (2) continues to move from the second position to the first position.

9. A printer, characterized in that: It comprises an ink supply mechanism as described in any one of claims 1-7.

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