CN115071278B

CN115071278B - Ink jet printer and printhead maintenance structure

Info

Publication number: CN115071278B
Application number: CN202210762735.2A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Lenovo Image Shandong Technology Co Ltd; Beijing Gaode Pinchuang Technology Co Ltd
Current assignee: Lenovo Image Shandong Technology Co Ltd; Beijing Gaode Pinchuang Technology Co Ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2023-06-20
Anticipated expiration: 2042-06-30
Also published as: CN115071278A

Abstract

The invention discloses an ink-jet printer and a printing head maintenance structure, which comprises a base, a sliding plate, a scraper, a motor, a transmission assembly, a moisturizing cover and a first elastic piece, wherein the scraper is fixedly arranged at one end of the sliding plate, a moisturizing cover sliding rail is arranged on the sliding plate and comprises a first rail, a second rail and a transition rail, the rail surface of the first rail is different from the rail surface of the second rail, a guide rod is arranged on the moisturizing cover, the first elastic piece provides upward elastic force to drive the moisturizing cover to move upwards, the guide rod is pressed on the moisturizing cover sliding rail, and when the guide rod slides on the moisturizing cover sliding rail, the moisturizing cover sliding rail pushes the moisturizing cover to overcome the elastic force of the first elastic piece to move downwards. The maintenance structure of the ink-jet printer and the printing head provided by the invention has the advantages of simple structure and low cost.

Description

Ink jet printer and printhead maintenance structure

Technical Field

The present disclosure relates to inkjet printers, and particularly to a printhead maintenance structure and an inkjet printer including the same.

Background

The ink jet printer is characterized in that liquid ink in the ink box is changed into fine particles through the printing head nozzle of the ink box to be sprayed on printing paper through the printing head, so that the ink box is an important component of the ink jet printer, and the printing effect of the ink jet printer is directly influenced by the quality of the ink box.

After the ink-jet printer is not used for a long time or used for a period of time, the problems of unclear printing, break points, broken lines and the like of the printing can occur, and the ink-box printing head of the ink-jet printer needs to be maintained, so that the ink-jet printing head can maintain a good working state for a long time. Existing printhead maintenance structures for inkjet printers typically include a doctor blade assembly, a moisturizing assembly, and an ink extraction assembly. The scraper assembly comprises a scraper and a scraper driving part, the scraper is generally a rubber scraper, and the scraper driving part drives the scraper to move so as to scrape off dirt attached to the surface of the printing head; the moisturizing component moisturizes the printing head after the printer stops printing and the carriage returns to a position; the ink pumping assembly comprises a suction pump (such as a peristaltic pump) which periodically pumps ink in the ink box to enable the ink to pass through a printing head of the printer so as to ensure that an ink jet channel of the printing head is unblocked.

The existing maintenance structure of the printing head of the ink-jet printer can well maintain the printing head by arranging the scraper component, the moisturizing component and the ink pumping component. However, the three components of the existing printhead maintenance structure require multiple power sources to cooperate to achieve printhead maintenance, which results in a printhead maintenance structure that is complex and costly.

Disclosure of Invention

The invention aims to provide a printhead maintenance structure which has the advantages of simple structure and low cost.

In order to achieve the above object, the invention provides a print head maintenance structure, which comprises a base, a slide plate, a scraper, a motor, a transmission assembly, a moisturizing cover and a first elastic member, wherein the slide plate is slidably arranged on the base, the motor drives the slide plate to slide left and right on the base through the transmission assembly, the scraper is fixedly arranged at one end of the slide plate, a first through hole is formed in the other end of the slide plate, the moisturizing cover is arranged below the slide plate and can be matched with a print head through the first through hole, a moisturizing cover sliding rail is arranged on the slide plate, the moisturizing cover sliding rail comprises a first rail, a second rail and a transition rail, the rail surface of the first rail is different from the rail surface of the second rail, the transition rail is connected with the first rail and the second rail, the scraper and the first rail are positioned at the same end of the slide plate, the first through hole and the second rail are positioned at the same end of the slide plate, the moisturizing cover is provided with a guide rod, and the moisturizing cover sliding rail is driven by the first guide rod to move upwards from the first rail to the sliding rail, and the moisturizing cover sliding rail is made to move upwards by the moisturizing cover sliding rail.

In a preferred embodiment, the number of the moisturizing cover sliding rails is two, the two moisturizing cover sliding rails are respectively located at the front side and the rear side of the moisturizing cover, the guide rods are fixedly installed at the front side and the rear side of the moisturizing cover, the guide rods at the front side are matched with the moisturizing cover sliding rails at the front side, and the guide rods at the rear side are matched with the moisturizing cover sliding rails at the rear side.

In a preferred embodiment, the number of the guide bars mounted on the front side of the moisturizing cap and the number of the guide bars mounted on the rear side of the moisturizing cap are two.

In a preferred embodiment, the front side and the rear side of the base are provided with sliding grooves, and the front end and the rear end of the sliding plate are inserted into the sliding grooves and can slide left and right on the sliding grooves.

In a preferred embodiment, the transmission assembly comprises a wheel shaft, a first gear, a second gear, a third gear, a fourth gear and a second elastic piece, wherein the wheel shaft is installed on the base, the first gear, the second gear and the third gear are all rotatably installed on the wheel shaft, the second gear is located between the first gear and the third gear, the third gear is in contact with the second gear, the second gear is an incomplete gear, the second gear and the third gear are simultaneously meshed with the fourth gear, the fourth gear is rotatably installed on the base, a second through hole is formed in a wheel disc of the first gear, a deflector rod is installed on the second gear, the deflector rod is inserted into the second through hole, when the deflector rod on the second gear moves from the second end of the second through hole to the first end along with the rotation of the second gear, the second gear can be matched with the fourth gear from a toothless part of the second gear to a tooth part of the fourth gear, the second gear is matched with the fourth gear in a rotating way, the second gear is matched with the fourth gear, the fourth gear is connected with the fourth gear, the transmission assembly can be connected with the right pump, and the transmission assembly can be driven by the left pump.

In a preferred embodiment, a rack is mounted on the slide plate, and the first gear is meshed with the rack.

In a preferred embodiment, the transmission assembly further comprises a second elastic member, and the elastic force of the second elastic member keeps the third gear in contact with the second gear.

In a preferred embodiment, a shaft sleeve is fixedly arranged on the wheel shaft, the second gear and the third gear are both rotatably arranged on the shaft sleeve, the second elastic piece is a pressure spring, the pressure spring is sleeved on the shaft sleeve, and two ends of the pressure spring are respectively pressed on the protrusions of the third gear and the shaft sleeve.

In a preferred embodiment, a spacer is provided on the wheel disc of the first gear, the spacer being located between the first gear and the second gear, and the spacer being in contact with the second gear.

The invention is different from the prior art in that the printing head maintenance structure provided by the invention is characterized in that the sliding plate is slidably arranged on the base, the moisturizing cover sliding rail is arranged on the sliding plate, the moisturizing cover is enabled to move upwards through the first elastic piece, when the motor drives the sliding plate to slide on the base, the scraper arranged on the sliding plate moves along with the sliding plate, and when the scraper moves to the printing head position, the guide rod on the moisturizing cover is contacted with the first rail of the moisturizing cover sliding rail, so that the scraping action of the scraper is realized. Meanwhile, the moisturizing cover is pushed downwards to a position far away from the sliding plate, after ink scraping is completed, the motor is reversed, the sliding block is driven to reversely slide, the guide rod on the moisturizing cover slides to the second track along with the sliding of the sliding block from the first track of the sliding rail of the moisturizing cover, the moisturizing cover moves upwards under the action of the elastic force of the first elastic piece, and the moisturizing cover is matched with the printing head through the first through hole on the sliding plate. Therefore, compared with the existing multiple-power printing head maintenance structure, the printing head maintenance structure provided by the invention has the advantages of simple structure and low cost.

Another object of the present invention is to provide an inkjet printer having the advantages of simple structure and low cost.

In order to achieve the above purpose, the technical scheme of the invention is realized as follows:

an inkjet printer comprising the printhead maintenance structure described above.

The technical advantages of the inkjet printer and the maintenance structure of the print head are the same as those of the prior art, and are not described herein.

Drawings

The directions of view in the following drawings are merely for the convenience of understanding the present invention and are not intended to limit the orientation of the printhead maintenance structure provided by the present invention.

FIG. 1 is a schematic illustration of the structure of a printhead maintenance structure of a preferred embodiment provided by the present invention;

FIG. 2 is an exploded view of the printhead maintenance structure shown in FIG. 1;

FIG. 3 is a front view of the printhead maintenance structure shown in FIG. 1, shown in a moisturized state;

FIG. 4 is a front cross-sectional view of the printhead maintenance structure shown in FIG. 1 with the doctor blade in a doctor blade home position;

FIG. 5 is a front cross-sectional view of the printhead maintenance structure shown in FIG. 1 with the doctor blade in a doctor blade end position;

FIG. 6 is a front cross-sectional view of the printhead maintenance structure shown in FIG. 1, with the moisturizing cap in a moisturizing state;

FIG. 7 is a rear cross-sectional view of the printhead maintenance structure in a moisturized state;

FIG. 8 is a right side cross-sectional view of the printhead maintenance structure shown in FIG. 1;

FIG. 9 is a schematic view of various gear engagement states of the printhead maintenance structure shown in FIG. 1;

FIG. 10 is an exploded view of FIG. 9;

FIG. 11 is a schematic illustration of the structure of the sled of the printhead maintenance structure shown in FIG. 1;

FIG. 12 is a schematic view of the moisture retaining cover of the printhead maintenance structure shown in FIG. 1;

FIG. 13 is a schematic view of the structure of the first gear;

FIG. 14 is a schematic view of a second gear configuration;

reference numerals illustrate:

1-a base; 2-a skateboard; 3-scraping knife; 4-motor; 5-a first elastic member; 6-a moisturizing cover; 7-a moisturizing cover sliding rail; 8-a first track; 9-a second track; 10-transition track; 11-a first through hole; 12-a guide rod; 13-a chute; 14-wheel axle; 15-a first gear; 16-a second gear; 17-a third gear; 18-fourth gear; 19-a second elastic member; 20-a second through hole; 21-a deflector rod; 22-a suction pump; 23-racks; 24-shaft sleeve; 25-spacer columns; 26-pressing plate; 27-toothed belt; 28-connecting rod; 29-transition teeth; 30-character car.

Detailed Description

The invention will be further described with reference to the drawings and embodiments. The purpose and purpose of these exemplary embodiments are merely to illustrate the present invention and are not intended to limit the true scope of the present invention in any way.

In the present invention, some directional terms such as "upper, lower, left, right" are defined and used in conformity with the upper, lower, left, right directions shown in fig. 3 without making an opposite description. "inner and outer" refer to the inner and outer relative to the contour of each component itself. These directional terms are used for ease of understanding and thus do not limit the scope of the invention.

In the present invention, when an element is referred to as being "fixed" to another element, it can be directly fixed to the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Referring to fig. 1 and 2, the printhead maintenance structure of the basic embodiment provided by the present invention includes a base 1, a slide plate 2, a doctor blade 3, a motor 4, a transmission assembly, a moisturizing cap 6, and a first elastic member 5.

The base 1 is fixed on the printer body and is used for accommodating and mounting various parts, and the structure of the base is preferably a cuboid shell structure with an opening at the upper side. The slide plate 2 is slidably mounted on the base 1, and the slide plate 2 may be slidably mounted on the base 1 in various ways, for example by a common structure such as a slider rail. Preferably, the front and rear sides of the base 1 are provided with sliding grooves 13, and the front and rear ends of the sliding plate 2 are inserted into the sliding grooves 13 and can slide left and right on the sliding grooves 13. Specifically, as shown in fig. 8, opposite right-angle sliding grooves 13 are formed at the upper ends of the front and rear side walls of the base 1, and the front and rear ends of the sliding plate 2 are mounted in the right-angle sliding grooves 13, and in order to facilitate mounting of the sliding plate 2, the upper groove wall of the right-angle sliding groove 13 is formed by the lower surface of a pressing plate 26 fixed on the base 1 by bolts. When the slide plate 2 is installed, the two pressing plates 26 are dismounted, then the front end and the rear end of the slide plate 2 are respectively placed in the two opposite right-angle sliding grooves 13, and the two pressing plates 26 are fixed on the base 1 through bolts.

The motor 4 drives the sliding plate 2 to slide left and right on the base 1 through the transmission assembly, and the motor 4 can be fixedly installed on the base 1 or on a printer body, preferably, as shown in fig. 4, the motor 4 is fixedly installed on the base 1.

As shown in fig. 2, the scraper 3 is fixedly mounted at one end of the sliding plate 2, and a first through hole 11 is formed at the other end of the sliding plate 2. The slide plate 2 is provided with a moisturizing cover slide rail 7, as shown in fig. 5 and 11, the moisturizing cover slide rail 7 comprises a first rail 8, a second rail 9 and a transition rail 10, the height of the rail surface of the first rail 8 is different from that of the rail surface of the second rail 9, and the transition rail 10 is connected with the first rail 8 and the second rail 9. Wherein the difference in height between the track surface of the first track 8 and the track surface of the second track 9 means that the track surfaces of the first track 8 and the second track 9 contacting the guide bar 12 are different in height in the vertical direction. Preferably, as shown with reference to fig. 11, the track surface of the first track 8 is lower than the track surface of the second track 9. The track surfaces of the transition track 10 serve to connect the track surfaces of the first track 8 and the second track 9, which are of different heights, so that the guide rods 12 can slide back and forth between the track surfaces of the first track 8 and the second track 9, and so that the first elastic members 5 are not compressed in transition while the printhead maintenance structure remains stationary.

As shown in fig. 4 and 5, the doctor blade 3 and the first rail 8 are located at the same end of the slide plate 2, and the first through hole 11 and the second rail 9 are located at the same end of the slide plate 2, and as shown in fig. 2, the first through hole 11 may have a larger size to reduce the weight of the slide plate 2.

As shown in fig. 6, the moisturizing cap 6 is located below the sled 2 and can be mated with a printhead through the first through-hole 11. Referring to fig. 12, the moisture-retaining cover 6 is provided with a guide bar 12. The lower end of the first elastic member 5 is pressed against the base 1, the other end is pressed against the lower end of the moisture-retaining cover 6, and the first elastic member 5 preferably adopts a compression spring. The first elastic member 5 provides an upward elastic force to drive the moisturizing cap 6 to move upward, and the guide rod 12 is pressed against the moisturizing cap sliding rail 7.

Referring to fig. 4 to 6, when the guide bar 12 slides on the moisturizing cap sliding rail 7 and slides from the second rail 9 to the first rail 8, the moisturizing cap sliding rail 7 pushes the moisturizing cap 6 to move downward against the elastic force of the first elastic member 5, that is, when the motor 4 drives the sliding plate 2 to move from left to right, the guide bar 12 moves from contact with the rail surface of the second rail 9 to contact with the rail surface of the first rail 8 through the transition rail 10, and the guide bar 12 is pushed downward by the rail surface. Similarly, when the guide bar 12 is slid from the first rail 8 onto the second rail 9 (the slide plate is moved from right to left), the moisturizing cap 6 is moved upward by the elastic force of the first elastic member 5.

In the print head maintenance structure provided in the above basic embodiment, when in use, as shown in fig. 4, the sliding plate 2 is at the start position of ink scraping, when ink scraping is required, the motor 4 drives the sliding plate 2 to move rightwards through the transmission assembly, along with the movement of the sliding plate 2, the scraper 3 mounted on the sliding plate 2 gradually approaches and passes through the print head on the carriage 30, when the scraper 3 passes through the print head, the scraping action of the scraper is realized, at this time, the moisturizing cap 6 is pushed downwards by the moisturizing cap sliding rail 7 on the sliding plate 2 to a position far away from the sliding plate 2, interference between the moisturizing cap 6 and the sliding plate 2 is avoided, along with the continued right movement of the sliding plate 2 until the position shown in fig. 5 is reached, at this time, the ink scraping action is completed, and the scraper 3 is at the end position of ink scraping. When the ink scraping is completed, the motor 4 is reversed, the sliding plate 2 is driven to slide leftwards, as shown in fig. 6, the guide rod on the moisturizing cap 6 slides from the first rail 8 of the moisturizing cap sliding rail 7 to the second rail 9 through the transition rail 10 along with the sliding of the sliding plate 2, at this time, the moisturizing cap 6 moves upwards under the elastic force of the first elastic member 5, and the moisturizing cap 6 is completely sprung and is matched with the printing head through the first through hole 11 on the sliding plate 2.

Therefore, the print head maintenance structure provided by the embodiment can realize the functions of scraping ink by the scraper and lifting the moisturizing cover by only arranging one power source (motor), and has the advantages of simple structure and low cost compared with the existing print head maintenance structure with multiple powers.

In the present invention, in order to make the moisturizing cap 6 more stable when sliding on the moisturizing cap slide rails 7 through the guide rods 12, preferably, as shown in fig. 11, the number of the moisturizing cap slide rails 7 is two, two moisturizing cap slide rails 7 are respectively located at the front and rear sides of the moisturizing cap 6, the guide rods 12 are fixedly installed at the front and rear sides of the moisturizing cap 6, the guide rods 12 at the front side are matched with the moisturizing cap slide rails 7 at the front side, and the guide rods 12 at the rear side are matched with the moisturizing cap slide rails 7 at the rear side. In the present embodiment, the guide rods 12 are installed on the front and rear sides of the moisture-retaining cover 6 so that the moisture-retaining cover slide rail 7 applies the same pushing force to both the front and rear sides of the moisture-retaining cover 6 through the guide rods 12, thereby increasing the stability of the moisture-retaining cover 6 when sliding on the moisture-retaining cover slide rail 7.

Further preferably, as shown in fig. 12, the number of the guide rods 12 mounted on the front side of the moisturizing cap 6 and the number of the guide rods 12 mounted on the rear side of the moisturizing cap 6 are two, based on the above embodiment. By providing two guide rods 12 on each of the front and rear sides of the moisturizing cap 6, the moisturizing cap 6 can be ensured to be more stable in moisturizing.

In a more preferred embodiment of the present invention, the longitudinal scraping, the lifting and the ink sucking functions of the moisturizing cap can be simultaneously realized by a power source (such as a motor). The advantage of this embodiment is mainly the improvement of the transmission assembly.

Referring to fig. 2, 9 and 10, in the present embodiment, the transmission assembly includes an axle 14, a first gear 15, a second gear 16, a third gear 17, a fourth gear 18 and a second elastic member 19.

The wheel axle 14 is mounted on the base 1, as shown in fig. 9, the first gear 15, the second gear 16 and the third gear 17 are rotatably mounted on the wheel axle 14, the second gear 16 is located between the first gear 15 and the third gear 17, and the third gear 17 is in contact with the second gear 16. As shown with reference to fig. 14, the second gear 16 is an incomplete gear, i.e., the second gear 16 includes a toothed portion and a non-toothed portion. As shown in fig. 9, the second gear 16 and the third gear 17 are simultaneously meshed with the fourth gear 18, that is, the gear tooth parameters of the toothed portion of the second gear 16 are the same as the gear tooth parameters (such as modulus, pitch diameter, etc.) of the third gear 17, so that the fourth gear 18 can be simultaneously meshed with the toothed portion of the second gear 16 and the third gear 17. The fourth gear 18 is rotatably mounted on the base 1.

Referring to fig. 13, a second through hole 20 is formed in the wheel disc of the first gear 15, and referring to fig. 10, a lever 21 is mounted on the second gear 16, and the lever 21 is inserted into the second through hole 20. The second through hole 20 has a width in a rotation direction of the lever 21, and when the lever 21 on the second gear 16 moves from the second end to the first end of the second through hole 20 with rotation of the second gear 16, the second gear 16 can be rotated from a toothless portion to a toothed portion to a fourth gear 18.

The motor 4 is in driving connection with the fourth gear 18, and a transmission gear set may be further provided between the fourth gear 18 of the motor 4 in consideration of the matching of the rotational speed of the motor 4 and the rotational speed of the fourth gear 18 and the suitability of the installation position of the motor 4. The fourth gear 18 is in driving connection with the suction pump 22, in this embodiment preferably the suction pump 22 is a peristaltic pump, and the fourth gear 18 is connected to the gear of the suction pump 22 by means of a pinion and toothed belt 27 coaxial therewith in one piece. The first gear 15 can drive the slide plate 2 to slide left and right, and preferably, as shown in fig. 11, a rack 23 is mounted on the slide plate 2, and the first gear 15 is engaged with the rack 23, so that when the first gear 15 rotates, the slide plate 2 can be driven to slide left and right by the rack 23 engaged with the first gear 15.

In the print head maintenance structure provided in the above embodiment, when in use, as shown in fig. 4, the slide plate 2 is at the start position of scraping ink, when the ink is required to be scraped, the motor 4 rotates forward, the fourth gear 18 is driven to rotate forward, at the same time, the fourth gear 18 is meshed with the third gear 17 and simultaneously meshed with the toothed part of the second gear 16, that is, the fourth gear 18 drives the second gear 16 and the third gear 17 to rotate simultaneously, because the deflector rod 21 of the second gear 16 is inserted into the second through hole 20 of the first gear 15, the deflector rod 21 presses the first end of the second through hole 20, the first gear 15 rotates together with the second gear 16 under the driving of the deflector rod along with the continuous rotation of the second gear 16, so that the first gear 15 drives the slide plate 2 to move from left to right, and the scraper 3 mounted on the slide plate 2 continuously moves right along with the continuous forward rotation of the motor 4, that the scraper 3 approaches and passes through the print head on the carriage 30, and at this time, the scraper scraping ink action is realized by the moisturizing cap 6 being pushed down by the moisturizing cap 7 on the slide plate 2 to the position of the moisturizing cap 2 away from the slide plate 2, interference with the slide plate 2 is avoided. As the slide plate 2 continues to move rightward until the position shown in fig. 5, at which time the wiping action is completed, the doctor blade 3 is in the wiping end position, and the fourth gear 18 is meshed with the toothed portion of the second gear 16.

When the ink scraping is completed, the motor 4 is reversed to drive the fourth gear 18 to rotate reversely, and the fourth gear 18 is meshed with the toothed part of the second gear 16 and the third gear 17 at the same time, so that the second gear 16 and the third gear 17 are driven to rotate simultaneously, the second gear 16 drives the deflector rod 21 on the second gear 16 to move reversely from the first end to the second end of the second through hole 20, and drives the first gear 15 to rotate, so that the sliding plate 2 is driven to slide leftwards, as shown in fig. 6, the guide rod on the moisturizing cap 6 slides from the first track 8 of the moisturizing cap sliding rail 7 to the second track 9 through the transition track 10 along with the sliding of the sliding plate 2, and at the moment, the moisturizing cap 6 moves upwards under the elastic force of the first elastic piece 5, and the moisturizing cap 6 completely bounces up and is matched with the printing head through the first through hole 11 on the sliding plate 2. After the moisturizing cap 6 is fully sprung, as shown in fig. 7, the second gear 16 rotates to a toothless portion of the second gear to be matched with the fourth gear 18, and although the second gear 16 contacts with the third gear 17 at this time, a friction force exists between the second gear 16 and the third gear 17, but because the second gear 16 contacts with the second end of the second through hole 20 on the first gear 15 through the deflector rod 21, that is, the second gear 16 has a load, the friction force between the second gear 16 and the third gear 17 is insufficient to enable the second gear 16 to continue to rotate, so that the sliding plate 2 remains motionless when the fourth gear 18 continues to rotate, the moisturizing cap 6 also remains motionless, and as the fourth gear 18 continues to rotate, the peristaltic pump is powered by the toothed belt 27, and the peristaltic pump is operated to pump ink (peristaltic ink or stops pumping ink can be pumped through the nozzle plugged by the peristaltic pump, so as to improve the printing effect of the printing head).

When the ink extraction is completed, the motor 4 stops rotating reversely. When the reset is needed, the motor 4 rotates forward to drive the fourth gear 18 to rotate forward, at this time, although the fourth gear 18 is engaged with the toothless portion of the second gear 16, since the second gear 16 contacts the third gear 17, there is a friction force between the second gear 16 and the third gear 17, and the second gear 16 rotates, the lever 21 thereon moves from the second end of the second through hole 20 of the first gear 15 to the first end, during which the second gear 16 is not loaded, so that as shown with reference to fig. 7, while the fourth gear 18 rotates, although the fourth gear 18 does not mesh with the teeth of the second gear 16, under the friction force of the third gear 17 and the second gear 16, the second gear 16 may rotate together with the third gear 17 until the lever 21 moves from the second end to the first end of the second through hole 20, and when the lever 21 contacts the first end of the second through hole 20, the teeth of the toothed portion of the second gear 16 start to mesh with the teeth of the fourth gear 18, at which time the fourth gear 18 drives the second gear 16 to rotate together by meshing with the toothed portion of the second gear 16, the lever of the second gear 16 contacts the first end of the second through hole 20, and pushes the first gear 15 to rotate together with the second gear 16, thereby driving the slide plate 2 to move rightward until the movement to the position shown in fig. 4 is completed.

When the printhead maintenance structure is in the reset state shown in fig. 4, the guide bar 12 contacts the transition rail 10, so that the first elastic member 5 can be prevented from being in a highly compressed state, and thus the service life of the first elastic member 5 can be improved.

In the above embodiment, the rotation direction of the motor 4 is the same as the rotation direction of the fourth gear 18, but the rotation directions of the motor 4 and the fourth gear 18 may be different depending on the transmission structure between the motor 4 and the fourth gear 18.

In order to avoid possible friction reduction between the second gear 16 and the third gear 17, it is preferable that, referring to fig. 9 and 10, the transmission assembly further comprises a second elastic member 19, and the elastic force of the second elastic member 19 keeps the third gear 17 in contact with the second gear 16.

Specifically, as shown in fig. 9 and 10, the axle 14 is further fixedly provided with a shaft sleeve 24, the second gear 16 and the third gear 17 are both rotatably mounted on the shaft sleeve 24, the second elastic member 19 is a compression spring, the compression spring is sleeved on the shaft sleeve 24, and two ends of the compression spring are respectively pressed on the protrusions of the third gear 17 and the shaft sleeve 24.

In the present invention, as shown in fig. 10, a spacer column 25 is provided on the wheel disc of the first gear 15, the spacer column 25 is located between the first gear 15 and the second gear 16, and the spacer column 25 is in contact with the second gear 16. In this embodiment, by providing the spacer 25, it is avoided that the wheel disc of the first gear 15 is attached to the second gear 16, so that the third gear 17 cannot rotate the second gear 16 by friction force when the maintenance structure of the printhead is reset.

As shown in fig. 14, in the present invention, the two ends of the toothless portion of the second gear 16 are further provided with transition teeth 29 capable of meshing with the fourth gear 18 through links 28, respectively, so that the operational stability of the maintenance structure of the printhead can be improved. Preferably, the number of transition teeth 29 on both ends of the toothless section of the second gear 16 is two.

The invention also provides an ink jet printer comprising the print head maintenance structure described in the above embodiments, so that the functions of longitudinal ink scraping, moisturizing cover lifting and peristaltic pump ink pumping can be realized by only matching one power source with a mechanical structure, and the cost is lower than that of a plurality of power implementation modes.

In summary, the technical scheme provided by the invention can realize the functions of longitudinal ink scraping, lifting of the moisturizing cover 6 and the like through one motor 4, and can also realize the function of peristaltic ink pumping. In the invention, by mounting each part on the base 1, the printhead maintenance structure can form an integrated module, and the mounting is more convenient.

The order of the above embodiments is merely for convenience of description, and does not represent the advantages or disadvantages of the embodiments.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting thereof; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a print head maintenance structure, its characterized in that includes base (1), slide (2), scraper (3), motor (4), drive assembly, moisturizing lid (6) and first elastic component (5), slide (2) slidable install on base (1), motor (4) pass through drive assembly drive slide (2) are in slide about on base (1), scraper (3) fixed mounting is in one end of slide (2), first through-hole (11) have been seted up to the other end of slide (2), install moisturizing lid slide rail (7) on slide (2), moisturizing lid slide rail (7) include first track (8), second track (9) and transition track (10), the track face of first track (8) is different with the height of the track face of second track (9), transition track (10) connect first track (8) and second track (9), scraper (3) are located with first track (8) are located with first through-hole (2) the same one end of slide (2), the moisturizing cover (6) is positioned below the sliding plate (2) and can be matched with the printing head through the first through hole (11), a guide rod (12) is arranged on the moisturizing cover (6), the first elastic piece (5) provides upward elastic force to drive the moisturizing cover (6) to move upwards, the guide rod (12) is pressed on the moisturizing cover sliding rail (7), and when the guide rod (12) slides on the moisturizing cover sliding rail (7) and slides from the second rail (9) to the first rail (8), the moisturizing cover sliding rail (7) pushes the moisturizing cover (6) to move downwards against the elastic force of the first elastic piece (5); wherein, the liquid crystal display device comprises a liquid crystal display device,

the transmission assembly comprises a wheel shaft (14), a first gear (15), a second gear (16), a third gear (17), a fourth gear (18) and a second elastic piece (19), wherein the wheel shaft (14) is arranged on the base (1), the first gear (15), the second gear (16) and the third gear (17) are rotatably arranged on the wheel shaft (14), the second gear (16) is positioned between the first gear (15) and the third gear (17), the third gear (17) is in contact with the second gear (16), the second gear (16) is an incomplete gear, the second gear (16) and the third gear (17) are simultaneously meshed with the fourth gear (18), the fourth gear (18) is rotatably arranged on the base (1), a second through hole (20) is formed in a wheel disc of the first gear (15), a rod (21) is arranged on the second gear (16), and when the second gear (21) is inserted into the second through hole (20) and is inserted into the second through hole (20) at one end of the second gear (16), the second gear (16) can rotate from the toothless part to the toothed part of the fourth gear (18) to the toothed part to be matched with the fourth gear (18), the motor (4) is in transmission connection with the fourth gear (18), the fourth gear (18) is in transmission connection with the suction pump (22), and the first gear (15) can drive the sliding plate (2) to slide left and right.

2. The print head maintenance structure according to claim 1, wherein the number of the moisturizing cover sliding rails (7) is two, the two moisturizing cover sliding rails (7) are respectively located at the front side and the rear side of the moisturizing cover (6), the guide rods (12) are fixedly installed at the front side and the rear side of the moisturizing cover (6), the guide rods (12) at the front side are matched with the moisturizing cover sliding rails (7) at the front side, and the guide rods (12) at the rear side are matched with the moisturizing cover sliding rails (7) at the rear side.

3. The printhead maintenance structure according to claim 2, wherein the number of the guide bars (12) mounted on the front side of the moisturizing cap (6) and the number of the guide bars (12) mounted on the rear side of the moisturizing cap (6) are two.

4. The printhead maintenance structure according to claim 1, wherein the front and rear sides of the base (1) are provided with a chute (13), and the front and rear ends of the slide plate (2) are inserted into the chute (13) and can slide left and right on the chute (13).

5. The printhead maintenance structure according to claim 4, wherein a rack (23) is mounted on the slide plate (2), and the first gear (15) is engaged with the rack (23).

6. The printhead maintenance structure according to claim 4, wherein the transmission assembly further includes a second elastic member (19), the elastic force of the second elastic member (19) keeps the third gear (17) in contact with the second gear (16).

7. The print head maintenance structure according to claim 6, wherein a shaft sleeve (24) is fixedly mounted on the wheel shaft (14), the second gear (16) and the third gear (17) are both rotatably mounted on the shaft sleeve (24), the second elastic member (19) is a compression spring, the compression spring is sleeved on the shaft sleeve (24), and two ends of the compression spring are respectively pressed on the protrusions of the third gear (17) and the shaft sleeve (24).

8. The printhead maintenance structure according to claim 4, characterized in that a spacer column (25) is provided on the wheel disc of the first gear (15), the spacer column (25) is located between the first gear (15) and the second gear (16), and the spacer column (25) is in contact with the second gear (16).

9. An inkjet printer comprising a printhead maintenance structure according to any one of claims 1 to 8.