Repeated positioning lifting mechanism and ink-jet printer

Abstract

The utility model provides a repeated positioning lifting mechanism and an ink-jet printer, and belongs to the technical field of positioning. The platform is movably connected with the frame; the lifting assembly is connected with the platform and is suitable for driving the platform to do reciprocating lifting motion under the action of driving force; the positioning assembly comprises a first positioning structure arranged at the highest point of the frame and a second positioning structure arranged at the lowest point of the frame, and when the platform moves to the highest point of the frame, the positioning assembly makes contact with the first positioning structure so as to position the current first position; and when the platform moves to the lowest point of the frame, the second positioning structure is in contact with the second positioning structure to position the current second position. According to the utility model, the problem of low repeated positioning precision of the ink-jet printer is solved, and the stability of the whole jet printing effect of the ink-jet printer is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning, in particular to a repeated positioning lifting mechanism and an inkjet printer. Background Art

[0002] During the inkjet printing process, inkjet printers precisely control the position of the nozzle to accurately deposit ink droplets onto paper. Inaccurate positioning can result in blurred images, color misalignment, or ghosting, compromising print quality. Furthermore, inkjet printers require multiple up-and-down reciprocating movements during operation, making repeatable positioning accuracy crucial and directly impacting print quality and image clarity. Therefore, ensuring consistent nozzle positioning every time is crucial for achieving high-quality print output.

[0003] Traditional inkjet printers ensure repeatable positioning accuracy through various means, such as controlling the movement of the print head with a high-precision stepper motor, detecting the position of the print head or paper with a single sensor, or ensuring the stability and accuracy of each component through mechanical structure design.

[0004] However, all of the above technologies have certain defects. Relying on the control of stepper motors may be affected by mechanical friction and step errors. Traditional single-sensor repeated positioning technology is easily disturbed by environmental changes, resulting in accumulated positioning errors. Mechanical components may also affect printing accuracy and stability due to wear or looseness, especially for the inaccurate positioning of the lowest and highest points of the print head's lifting movement. Utility Model Content

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art of low repeat positioning accuracy and poor stability of the lowest and highest points of the lifting movement, which affect the printing effect, thereby providing a repeat positioning lifting mechanism and an inkjet printer.

[0006] In order to solve the above technical problems, the utility model provides a repeated positioning lifting mechanism suitable for an inkjet printer, comprising:

[0007] frame;

[0008] a platform movably connected to the framework;

[0009] A lifting assembly connected to the platform, adapted to drive the platform to perform reciprocating lifting motion under the action of a driving force;

[0010] At least one group of positioning components includes a first positioning structure respectively arranged at the highest point of the frame and a second positioning structure respectively arranged at the lowest point of the frame. When the platform moves to the highest point of the frame, it contacts the first positioning structure to locate the current first position; when the platform moves to the lowest point of the frame, it contacts the second positioning structure to locate the current second position.

[0011] Optionally, the first positioning structure and the second positioning structure both include an adjustment structure provided on the frame and a travel switch connected to the adjustment structure, and the adjustment structure is suitable for adjusting and fixing the initial position of the travel switch.

[0012] Optionally, the adjustment structure includes an adjustment slot provided on the frame, an adjustment block slidably connected to the adjustment slot, and a micrometer abutting the adjustment block. The travel switch is fixed on the adjustment block, and the micrometer is rotated to adjust the position of the adjustment block in the adjustment slot, and is fixed by fasteners after reaching a predetermined position.

[0013] Optionally, the repeated positioning lifting mechanism further includes a displacement sensor connected to the platform and a controller connected to the displacement sensor, wherein the displacement sensor is adapted to detect the current position of the platform when the platform moves up and down and send the current position to the controller.

[0014] Optionally, the displacement sensor includes a grating ruler fixedly connected to the frame and a reading head slidably connected to the grating ruler, and the reading head is connected to the controller signal.

[0015] Optionally, the lifting assembly includes multiple lifting structures connected to the platform for lifting, a connecting structure connecting the multiple lifting structures, and a driving structure connected to the connecting structure, and the driving structure drives the multiple lifting structures to rise and fall synchronously through the connecting structure.

[0016] Optionally, the connection structure includes a plurality of connection shafts and a commutator connecting adjacent connection shafts.

[0017] Optionally, the plurality of connecting shafts and the plurality of commutators are symmetrically distributed with the driving structure as the center, and each commutator is connected to a lifting structure.

[0018] Optionally, the lifting assembly is connected to the platform via a mounting structure, a first sliding member is provided on the mounting structure, and a second sliding member adapted to the first sliding member is provided at a corresponding position of the frame.

[0019] Also provided is an inkjet printer comprising the repeated positioning lifting mechanism.

[0020] The technical solution of this utility model has the following advantages:

[0021] 1. The repeated positioning lifting mechanism provided by the utility model includes: a frame; a platform, movably connected to the frame; a lifting assembly, connected to the platform, suitable for driving the platform to perform reciprocating lifting motion under the action of a driving force; at least one set of positioning assemblies, including a first positioning structure respectively arranged at the highest point of the frame and a second positioning structure respectively arranged at the lowest point of the frame, when the platform moves to the highest point of the frame, it contacts the first positioning structure to locate the current first position, and when the platform moves to the lowest point of the frame, it contacts the second positioning structure to locate the current second position.

[0022] Accurate initial position is the basis for ensuring repeated positioning accuracy. The highest and lowest points of the platform's lifting movement on the frame are determined by high-precision positioning components. When the lifting platform moves to the highest or lowest point, the positioning component controls the lifting component to stop moving. In this way, the lifting platform can maintain high accuracy and stability during repeated positioning, thereby ensuring the printing effect.

[0023] 2. The repeated positioning lifting mechanism provided by the utility model, the adjustment detection component also includes: the first positioning structure and the second positioning structure both include an adjustment structure provided on the frame and a limit switch connected to the adjustment structure, the adjustment structure is suitable for adjusting and fixing the initial position of the limit switch to achieve the adjustable position of the limit switch, which is convenient for the later calibration of the initial position.

[0024] 3. The repeatable positioning lifting mechanism provided by the utility model comprises an adjustment structure including an adjustment slot provided on a frame, an adjustment block slidably connected to the adjustment slot, and a micrometer abutting the adjustment block. A travel switch is fixed on the adjustment block, and the micrometer is rotated to adjust the position of the adjustment block in the adjustment slot. After reaching a predetermined position, the adjustment block is fixed by fasteners. The high precision of the micrometer ensures that the travel switch is always located at the precise initial position of the travel.

[0025] 4. The repeated positioning lifting mechanism provided by the present invention also includes a displacement sensor connected to the platform and a controller connected to the displacement sensor signal. The displacement sensor is suitable for detecting the current position when the platform is lifted and lowered and sending it to the controller to realize adaptive control of the lifting component according to the displacement sensor signal.

[0026] 5. The repeated positioning lifting mechanism provided by the utility model, the displacement sensor includes a grating scale fixedly connected to the frame and a reading head slidably connected to the grating scale. The reading head is connected to the controller to read the height information of the platform lifting in real time and feed it back to the lifting component, and perform corresponding drive control according to the signal.

[0027] 6. The repeated positioning lifting mechanism provided by the utility model, the lifting assembly includes multiple lifting structures connected to the platform lifting, a connecting structure connecting the multiple lifting structures and a driving structure connected to the connecting structure. The driving structure drives the multiple lifting structures to rise and fall synchronously through the connecting structure. The multiple lifting structures are connected to the same driving structure to ensure the synchronization of the overall lifting of the platform.

[0028] 7. The repeatable positioning lifting mechanism provided by the present invention has a connection structure including a plurality of connection shafts and a commutator connecting the adjacent plurality of connection shafts, so as to realize conversion of the rotation of the driving structure into the up and down linear motion of the lifting structure.

[0029] 8. The repeated positioning lifting mechanism provided by the utility model has multiple connecting shafts and multiple commutators symmetrically distributed with the driving structure as the center. Each commutator is connected to a lifting structure. The symmetrical distribution ensures that the platform is evenly stressed, thereby improving the stability of the platform.

[0030] 9. The utility model provides a repeated positioning lifting mechanism, in which the lifting assembly is connected to the platform through a mounting structure. A first sliding member is provided on the mounting structure, and a second sliding member adapted to the first sliding member is provided at a corresponding position of the frame. Through the cooperation of the first sliding member and the second sliding member, the lifting platform is ensured to remain stable during movement, reducing vibration and tilting.

[0031] 10. The present invention also provides an inkjet printer, which has the advantages described in any of the above items due to the use of the repeatable positioning and lifting mechanism described in any of the above items. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 A three-dimensional diagram of a specific implementation of the repeated positioning lifting mechanism provided in an embodiment of the present utility model;

[0034] Figure 2 for Figure 1 A-direction enlarged view;

[0035] Figure 3 A perspective view of a lifting assembly provided in an embodiment of the present utility model;

[0036] Figure 4 for Figure 1 B-direction enlarged view.

[0037] Description of reference numerals:

[0038] 1. Frame; 2. Platform; 3. First positioning structure; 4. Second positioning structure; 5. Travel switch; 6. Adjustment slot; 7. Adjustment block; 8. Micrometer; 9. Grating scale; 10. Reading head; 11. Drive structure; 12. Connecting shaft; 13. Commutator; 14. First sliding member; 15. Second sliding member; 16. Lifting structure; 17. Mounting structure. DETAILED DESCRIPTION

[0039] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0042] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] like Figure 1As shown, a specific implementation of the repeated positioning lifting mechanism provided in this embodiment is suitable for inkjet printers, including: a frame 1; a platform 2, movably connected to the frame 1; a lifting assembly, connected to the platform 2, suitable for driving the platform 2 to perform reciprocating lifting motion under the action of a driving force; at least one group of positioning assemblies, including a first positioning structure 3 and a second positioning structure 4 respectively provided at the highest point of the frame 1, which contacts the first positioning structure 3 to locate the current first position when the platform 2 moves to the highest point of the frame 1, and contacts the second positioning structure 4 to locate the current second position when the platform 2 moves to the lowest point of the frame 1. Specifically, the frame as a whole has high strength and rigidity, can withstand greater pressure and has strong anti-deformation ability, and is usually a regular polyhedron such as a cube or a cuboid. The first position refers to the highest point of the lifting movement, and the second position refers to the lowest point of the lifting movement.

[0044] like Figure 1 As shown, the repeated positioning lifting mechanism provided in this embodiment determines the highest point and the lowest point of the lifting movement of the platform 2 on the frame 1 through the positioning component. When the lifting platform moves to the highest point or the lowest point, the platform 2 contacts the positioning component, and the lifting component is controlled by the positioning component to continue moving or stop moving, so that the platform 2 can maintain high accuracy and stability during the repeated positioning process.

[0045] like Figure 1 As shown, in the repositioning lifting mechanism provided in this embodiment, the first positioning structure 3 and the second positioning structure 4 each include an adjustment structure provided on the frame 1 and a travel switch 5 connected to the adjustment structure. The adjustment structure is suitable for adjusting and fixing the initial position of the travel switch 5, and the accuracy of the travel switch 5 is not less than 0.05mm. This arrangement enables high-precision adjustment of the position of the travel switch 5, facilitating adjustment of the initial position according to specific needs. Of course, the above description is not restrictive. In some alternative embodiments, the positioning structure can also use a photoelectric sensor.

[0046] like Figure 2 As shown, in the repeated positioning lifting mechanism provided in this embodiment, the adjustment structure includes an adjustment slot 6 provided on the frame 1, an adjustment block 7 slidably connected to the adjustment slot 6, and a micrometer 8 abutting the adjustment block 7. The travel switch 5 is fixed on the adjustment block 7. The micrometer 8 is rotated to adjust the position of the adjustment block 7 in the adjustment slot 6, and is fixed by fasteners after reaching the predetermined position, thereby fixing the position of the travel switch 5. A groove body is provided at the bottom of the adjustment block 7, and the top of the micrometer 8 abuts the groove body. With such an arrangement, the high precision of the micrometer 8 can be used to cooperate with the adjustment slot 6 to ensure that the travel switch 5 is always located at the precise initial position of the travel. Of course, the above description is not restrictive. In some alternative embodiments, the adjustment block can be omitted, and the micrometer can directly abut the travel switch.

[0047] like Figure 1 As shown, the repositioning lifting mechanism provided in this embodiment further includes a displacement sensor connected to platform 2 and a controller connected to the displacement sensor. The displacement sensor is adapted to detect the current position of platform 2 during its lifting motion and transmit the information to the controller. This arrangement enables adaptive control of the lifting assembly based on the displacement sensor signal. Of course, the above description is not restrictive; in some alternative embodiments, the position of the lifting platform can be detected using a potentiometer.

[0048] like Figure 1 As shown, in the repeated positioning lifting mechanism provided by this embodiment, the displacement sensor includes a grating ruler 9 fixedly connected to the frame 1 and a reading head 10 slidably connected to the grating ruler 9, and the reading head 10 is connected to the controller signal. The grating ruler is fixed to the vertical support rod of the frame 1 by fasteners such as screws or adhesives, and is preferably arranged at the four corners of the frame. Of course, it can also be arranged at other positions as needed. It is arranged in this way to read the height information of the platform lifting in real time and feed it back to the lifting assembly, and perform corresponding drive control according to the signal. Multiple groups of displacement sensors are set to ensure the accuracy of detection. Of course, the above description is not restrictive. In some alternative embodiments, the installation positions of the grating ruler and the reading head can be interchanged.

[0049] like Figure 3 As shown, in the repeated positioning lifting mechanism provided by this embodiment, the lifting assembly includes a plurality of lifting structures 16 connected to the platform 2 for lifting and lowering, a connecting structure connecting the plurality of lifting structures 16, and a driving structure 11 connected to the connecting structure, and the driving structure 11 drives the plurality of lifting structures 16 to rise and fall synchronously through the connecting structure. Preferably, the lifting structure 16 is arranged at the four corners of the frame and the middle position of the long side to ensure the stability of the overall lifting of the platform and to play a certain supporting role. The lifting structure 16 can be a cylinder, an electric push rod, etc., and the driving structure 11 is a motor. In this way, by sharing the same set of drive structure 11 outputs, the power system of multi-point synchronous lifting ensures the synchronicity and stability of the overall lifting of the lifting platform. Of course, the above description is not restrictive. In some alternative embodiments, the method of realizing synchronous drive can also be used to control multiple motors through a synchronous motor drive system to reduce the load of a single drive.

[0050] like Figure 3 As shown, in the repositioning lifting mechanism provided in this embodiment, the connecting structure includes multiple connecting shafts 12 and a commutator 13 connecting adjacent connecting shafts 12. This arrangement converts the rotation of the drive structure 11 into the vertical linear motion of the lifting structure 16. Of course, the above description is not restrictive; in some alternative embodiments, the transmission method can also be a synchronous belt drive.

[0051] like Figure 3 As shown, in the repeated positioning lifting mechanism provided in this embodiment, multiple connecting shafts 12 and multiple commutators 13 are symmetrically distributed around the drive structure 11, and each commutator 13 is connected to a lifting structure 16. Specifically, the drive structure 11 is arranged at the bottom center of the frame 1 and is connected to each commutator 13 via a pair of oppositely disposed connecting shafts 12. Each commutator 13 is connected to a commutator 13 via a pair of oppositely disposed connecting shafts 12. As a result, the six commutators 13 are arranged in parallel in pairs. This arrangement ensures that the platform 2 is evenly stressed and improves the stability of the platform 2 during movement.

[0052] like Figure 4 As shown, in the repeated positioning lifting mechanism provided in this embodiment, the lifting assembly is connected to the platform 2 through a mounting structure 17, a first sliding member 14 is provided on the mounting structure 17, and a second sliding member 15 adapted to the first sliding member 14 is provided at a corresponding position of the frame 1. Specifically, the mounting structure 17 is a right-angle plate, the first sliding member 14 is a slider, and the second sliding member 15 is a slide rail. With such an arrangement, the cooperation between the first sliding member 14 and the second sliding member 15 can ensure that the lifting platform 2 remains stable during movement, and reduce vibration and tilting. Of course, the above description is not restrictive. In some alternative embodiments, the mounting positions of the first sliding member and the second sliding member can be interchangeable.

[0053] like Figure 1 As shown, an inkjet printer includes a repeated positioning lifting mechanism. The repeated positioning lifting mechanism is configured in this way to improve the repeated positioning accuracy and printing stability of the inkjet printer.

[0054] Working principle:

[0055] During the up and down reciprocating motion of the inkjet printer platform 2, the highest and lowest positions of the platform 2 are defined by the positioning structure. Specifically, the lifting mechanism connects the unique drive structure 11 with multiple lifting structures to ensure the synchronous lifting and lowering of the various parts of the platform 2, and multiple sets of slide rail slider assemblies are provided to provide guidance for the lifting and lowering of the platform 2. When defining the initial lowest point position, the position of the travel switch 5 is accurately located by the micrometer 8 and the adjustment slot 6, providing an accurate initial position for the reciprocating motion of the platform 2. In the process, the height information of the platform 2 is obtained through the grating scale displacement sensor and sent to the controller to control the operation of the lifting mechanism, thereby improving the accuracy of repeated positioning, ensuring stable operation of the equipment, and improving printing quality.

[0056] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A repositioning lifting mechanism suitable for an inkjet printer, characterized in that: include: Framework (1); A platform (2) movably connected to the frame (1); A lifting assembly connected to the platform (2) and adapted to drive the platform (2) to perform reciprocating lifting motion under the action of a driving force; At least one group of positioning components comprises a first positioning structure (3) respectively arranged at the highest point of the frame (1) and a second positioning structure (4) arranged at the lowest point of the frame (1); when the platform (2) moves to the highest point of the frame (1), the first positioning structure (3) contacts the first positioning structure (3) to locate the current first position; when the platform (2) moves to the lowest point of the frame (1), the second positioning structure (4) contacts the second positioning structure (4) to locate the current second position.

2. The repeated positioning lifting mechanism according to claim 1, characterized in that: The first positioning structure (3) and the second positioning structure (4) both comprise an adjustment structure provided on the frame (1) and a travel switch (5) connected to the adjustment structure, wherein the adjustment structure is suitable for adjusting and fixing the initial position of the travel switch (5).

3. The repeated positioning lifting mechanism according to claim 2, characterized in that: The adjustment structure comprises an adjustment slot (6) provided on the frame (1), an adjustment block (7) slidably connected to the adjustment slot (6), and a micrometer (8) abutting against the adjustment block (7); the travel switch (5) is fixed on the adjustment block (7); the micrometer (8) is rotated to adjust the position of the adjustment block (7) in the adjustment slot (6), and is fixed by a fastener after reaching a predetermined position.

4. The repeated positioning lifting mechanism according to claim 1, characterized in that: It also includes a displacement sensor connected to the platform (2) and a controller connected to the displacement sensor, wherein the displacement sensor is suitable for detecting the current position when the platform (2) moves up and down and sending the current position to the controller.

5. The repeated positioning lifting mechanism according to claim 4, characterized in that: The displacement sensor comprises a grating ruler (9) fixedly connected to the frame (1) and a reading head (10) slidably connected to the grating ruler (9), wherein the reading head (10) is connected to the controller.

6. The repeated positioning lifting mechanism according to claim 1, characterized in that: The lifting assembly comprises a plurality of lifting structures (16) connected to the platform (2) for lifting, a connecting structure connecting the plurality of lifting structures (16), and a driving structure (11) connected to the connecting structure, wherein the driving structure (11) drives the plurality of lifting structures (16) to rise and fall synchronously via the connecting structure.

7. The repeated positioning lifting mechanism according to claim 6, characterized in that: The connection structure includes a plurality of connection shafts (12) and a commutator (13) for connecting the adjacent plurality of connection shafts (12).

8. The repeated positioning lifting mechanism according to claim 7, characterized in that: The plurality of connecting shafts (12) and the plurality of commutators (13) are symmetrically distributed with the driving structure (11) as the center, and each commutator (13) is connected to a lifting structure (16).

9. The repeated positioning lifting mechanism according to any one of claims 1 to 8, characterized in that: The lifting assembly is connected to the platform (2) via a mounting structure (17); a first sliding member (14) is provided on the mounting structure (17); and a second sliding member (15) adapted to the first sliding member (14) is provided at a corresponding position of the frame (1).

10. An inkjet printer, characterized in that: It comprises the repeated positioning lifting mechanism described in any one of claims 1-9.

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