CN100441417C - Printing apparatus - Google Patents

Abstract

A printing device comprises a printing head, a cover body module and a positioning module. The printing head is provided with an ink jetting hole, the cover body module comprises a cover body and a positioning hole, and the positioning module comprises a positioning pin. When the printing head moves along a first direction to push the positioning module, the positioning pin is separated from the positioning hole, so that the cover body module moves along a second direction to cover the ink jetting hole, and when the printing head moves along a direction opposite to the first direction to push the cover body module, the positioning pin can be embedded in the positioning hole again to keep a preset distance between the cover body module and the printing head. The printing head is also provided with a first guide piece, the cover body module also comprises a second guide piece, when the printing head moves along the direction opposite to the first direction, the second guide piece is pushed by the first guide piece, so that the positioning pin is embedded in the positioning hole, and the first guide piece and the second guide piece are provided with inclined planes. The design can ensure that the cover body of the printing head covers the action of the printing head after the printing head reaches the positioning, thereby avoiding the interference between the cover body and the printing head, ensuring the sealing effect of the cover body and the printing head and prolonging the service life of the cover body mechanism.

Description

printing device

technical field

The invention relates to a printing device, in particular to a printing device which can avoid the interference between the cover body of the printing head and the printing head.

Background technique

After the print head of a traditional printer enters the service station, the ink remaining in the orifice is scraped off by a wiper, and then the cap moves to cover the orifice However, when the cover is covering the ink jet hole, the print head is still moving, so the print head and the cover will interfere, which will affect the sealing effect of the cover and even cause damage to the cover.

Contents of the invention

The purpose of the present invention is to provide a cover that can be positioned instantly, so that the print head will not interfere with the cover when moving, so as to prolong the life of the cover mechanism.

A preferred embodiment of the printing device of the present invention includes a printing head, a cover module and a positioning module. The printing head has an ink jet hole, the cover module includes a cover and a positioning hole, and the positioning module includes a positioning pin. When the print head moves along a first direction to push the positioning module, the positioning pin breaks away from the positioning hole, whereby the cover module moves along a second direction so that the cover covers the ink ejection hole. When the print head moves along with the first When moving in the opposite direction to push the cover module, the positioning pin can re-fit into the positioning hole, so that the cover module and the printing head maintain a predetermined distance. The first direction is perpendicular to the second direction.

In the preferred embodiment above, the print head also has a first guide, and the cover module also includes a second guide. When the print head moves in the direction opposite to the first direction, the first guide The guide piece pushes the second guide piece so that the positioning pin fits into the positioning hole. The first guide and the second guide have a wedge-shaped surface that cooperates with each other.

The preferred embodiment above also includes a first biasing member, biased to the cover module, so that the cover module moves toward the print head so that the cover covers the ink ejection hole, and when the print head moves in the direction opposite to the first direction When moving in the direction, the print head pushes the cover module against the bias of the first bias member.

The preferred embodiment above also includes a second biasing member biased on the positioning module. When the print head moves in the direction opposite to the first direction, the positioning module is biased by the second biasing member to make the positioning The pin fits into the positioning hole.

In the above preferred embodiments, the edges of the end surfaces of the positioning pins are rounded.

In the preferred embodiment above, the positioning hole includes a first hole and a second hole. The diameter of the first hole is larger than that of the second hole. part, and then through the second hole part. The positioning hole also includes a slope, which is arranged between the first hole and the second hole.

In addition, a plurality of printing heads, a cover module and a positioning module may be included in the preferred embodiment of the present invention. Each print head has an ink ejection hole, the cover module includes a plurality of covers and a positioning hole, and the cover corresponds to the print head. The positioning module includes a positioning pin. When the print head moves along a first direction to push the positioning module, the positioning pin breaks away from the positioning hole, so that the cover module moves along a second direction so that the cover covers the ink jet hole, When the print head moves in a direction opposite to the first direction to push the cover module, the positioning pin fits into the positioning hole, so that the cover module and the print head maintain a predetermined distance.

In order to make the above and other objects, features, and advantages of the present invention more comprehensible, a preferred embodiment will be described in detail below together with the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram of the inkjet head and the cover mechanism of the printing device of the present invention.

Fig. 2 is a schematic diagram of the cover module of the present invention.

Fig. 3 is a schematic diagram of the positioning module of the present invention.

4 to 9 illustrate the operation of the print head and cover module of the present invention.

FIG. 10 shows a schematic diagram of the application of the cover module and positioning module of the present invention to a printing device with multiple print heads.

11A and 11B show another embodiment of the positioning hole of the present invention.

Symbol Description

10～print head; 12～first guide; 20～cover module; 22～body; 24～cover; 25～bias part; 26～cover base; 27～second guide; 28～ Positioning hole; 28a～first hole; 28b～second hole; 28c～incline; 30～positioning module; 32～positioning pin; 34～pushing part; 36～connecting part; 40～first biasing member; 50～second biasing member; 121, 271～incline.

Detailed ways

FIG. 1 is a schematic diagram of a preferred embodiment of the inkjet head and cover mechanism of the printing device of the present invention. The printing device of the present invention includes a printing head 10 , a cover module 20 , a positioning module 30 , a first biasing member 40 and a second biasing member 50 . The print head 10 includes a first guide 12 . The cover module 20 includes a body 22 , a cover 24 , a biasing portion 25 , a cover base 26 , a second guide 27 and a positioning hole 28 . The positioning module 30 includes a positioning pin 32 , a pushing portion 34 and a connecting portion 36 . The first and second biasing members 40, 50 are compression springs in this embodiment, wherein the first biasing member 40 is biased on the biasing portion 25 of the cover module 30, and the second biasing member 50 is biased on the positioning The connecting portion 36 of the module 30 . FIG. 2 is a schematic diagram of the cover module 20 . In the cover module 20, the cover 24 is fixed on the cover base 26, and the positioning hole 28 is arranged on the cover base 26, the cover base 26 is connected to the body 22, and the second guide 27 is also connected to the body twenty two. FIG. 3 is a schematic diagram of the positioning module 30 . In the positioning module 30, the connecting portion 36 connects the positioning pin 32 and the pushing portion 34, and the edge of the end surface of the positioning pin 32 forms a rounded corner to prevent the positioning pin 32 from colliding with the side wall of the cover base 26 during the reset process described later. produce greater friction. In this embodiment, the first guiding member 12 and the second guiding member 27 are two wedge-shaped blocks with similar shapes, and have inclined surfaces 121 and 271 respectively. By fitting the positioning pin 32 into the positioning hole 28 , the cover 24 is positioned and kept at a predetermined distance from the print head 10 .

4 to 9 illustrate the operation of the print head 10 and the cover module 20 . The print head 10 moves in the direction indicated by the arrow A (the first direction), and starts to push the pushing part 34 of the positioning module 30, so that the positioning pin 32 starts to move to the left of the drawing, and the positioning pin 32 starts to move from the positioning pin to the left side of the drawing. Move out in the hole 28, as shown in Fig. 4, Fig. 5. When the print head 10 is positioned, the positioning pin 32 is completely separated from the positioning hole 28, and the cover module 20 is pushed upward in the direction of the arrow B (the second direction) by the restoring force of the first biasing member 40, so that the cover body 24 covers the ink ejection hole (not shown) of the print head 10, while the inclined surface 121 of the first guide 12 is in contact with the inclined surface 271 of the second guide 27, and the positioning pin 32 is controlled by the second biasing member 50 Butt against the side of the cover base 26 , as shown in FIG. 6 .

When the print head 10 moves away in the direction of arrow C (opposite to the first direction), the slope 121 of the first guide 12 and the slope 271 of the second guide 27 move relative to each other, so that the cover module 20 moves toward Move in the direction of the arrow D, as shown in Figure 7. The cover module 20 continues to move until the positioning pin 32 is just aligned with the positioning hole 28 , as shown in FIG. 8 . The positioning pin 32 is fitted into the positioning hole 28 by the restoring force of the second biasing member 50 , so that the cover module 20 is positioned and kept at the predetermined distance from the print head 10 , as shown in FIG. 9 .

FIG. 10 shows a schematic diagram of the application of the cover module and positioning module of the present invention to a printing device with multiple print heads. The printing device includes a plurality of print heads 10, a cover module 20, a positioning module 30, a first bias member 40 and a second bias member 50, and the first guide member 12 is arranged in the print head 10. On a print head closest to the positioning module, the cover module 20 has a plurality of covers 24 and cover bases 26, which correspond to the above-mentioned multiple print heads 10, and positioning holes 28 are arranged on the above-mentioned multiple cover bases. 26 one of them. The rest of the structure and operating principles are the same as those of the above-mentioned preferred embodiment, so the description thereof is omitted.

11A and 11B show another embodiment of the positioning hole of the present invention. The positioning hole 28 includes a first hole portion 28a and a second hole portion 28b. The diameter of the first hole portion 28a is larger than the diameter of the second hole portion 28b. Bevel 28c. Thereby, when the positioning pin 31 is separated from the positioning hole 28, the positioning module 20 rises in a stepwise manner, so as to prevent the cover body 24 from colliding with the inkjet head 10 rapidly. When the portion 28b enters the first hole portion 28a, or enters the second hole portion 28b from the first hole portion 28a, the friction between the positioning pin 32 and the wall of the positioning hole is reduced.

The design of the cover module and the positioning module of the present invention can make the cover start to move after the print head reaches the positioning, so as to avoid the phenomenon of interference between the cover and the print head during the contact process, thereby improving the sealing effect of the cover and Extend the life of the cover mechanism.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person in the industry may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope should be defined by the claims.

Claims (9)

1. A printing device, comprising: A printing head with an ink ejection hole; A cover module, including a cover and a positioning hole; and A positioning module, including a positioning pin, wherein, when the printing head moves along a first direction to push the positioning module, the positioning pin breaks away from the positioning hole, whereby the cover module moves along a second direction to Make the cover cover the ink ejection hole, when the print head moves in the direction opposite to the first direction to push the cover module, the positioning pin fits into the positioning hole, so that the cover module maintain a predetermined distance from the print head, Wherein, the print head also has a first guide, and the cover module also includes a second guide. When the print head moves in a direction opposite to the first direction, the first guide A piece pushes the second guide piece so that the positioning pin fits into the positioning hole, wherein the first guide piece and the second guide piece each have an inclined surface. 2. The printing device according to claim 1, further comprising a first biasing member, biased to the cover module, so that the cover module moves toward the print head so that the cover covers the ink jet hole, and when the print head moves in a direction opposite to the first direction, the print head pushes the cover module against the bias of the first bias member. 3. The printing device according to claim 1, further comprising a second biasing member, biased to the positioning module, when the printing head moves in a direction opposite to the first direction, by the second The biasing member biases the positioning module so that the positioning pin fits into the positioning hole. 4. The printing apparatus as claimed in claim 1, wherein edges of the end surfaces of the positioning pins are rounded. 5. The printing device according to claim 1, wherein the positioning hole comprises a first hole and a second hole, the diameter of the first hole is larger than that of the second hole, when the positioning pin is fitted into When the positioning hole is used, it first passes through the first hole, and then passes through the second hole. 6. The printing device as claimed in claim 4, wherein the positioning hole further comprises a slope disposed between the first hole portion and the second hole portion. 7. The printing device as claimed in claim 1, wherein the first direction is perpendicular to the second direction. 8. The printing apparatus according to claim 1, wherein, The print head can be multiple, and each print head has an ink ejection hole; The cover module may include a plurality of covers and a positioning hole, and the covers correspond to the print heads. 9. The printing device as claimed in claim 8, wherein the first guide member is disposed on the print head on the side of the print head close to the positioning module.

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