阅读说明：本技术 能够实现碳带盒延迟顶出的热敏打印机 (Thermal printer capable of realizing delayed ejection of carbon tape box ) 是由 柳雄 周鹏 于 2021-03-16 设计创作，主要内容包括：本发明涉及一种能够实现碳带盒延迟顶出的热敏打印机,包括打印头、机架、碳带盒、碳带盒顶出机构、打印头上升机构和打印头解锁机构；碳带盒顶出机构包括顶出支架、顶出块、弹片和压缩弹簧；打印头上升机构包括打印头支架、打印头转轴、凸轮支架、凸轮转轴、凸轮扳手和扭簧；打印头解锁机构包括碳带开关、左钩爪、右钩爪、钩爪转轴和拉伸弹簧。通过本发明可使碳带盒顶出动作滞后于按下碳带开关的动作,实现了碳带盒延迟顶出,从而解决了现有技术中存在的因碳带不平整而导致无法取出的问题。(The invention relates to a thermal printer capable of realizing delayed ejection of a carbon ribbon cartridge, which comprises a printing head, a rack, a carbon ribbon cartridge ejection mechanism, a printing head lifting mechanism and a printing head unlocking mechanism, wherein the printing head is arranged on the rack; the carbon ribbon cartridge ejection mechanism comprises an ejection support, an ejection block, an elastic sheet and a compression spring; the printing head lifting mechanism comprises a printing head bracket, a printing head rotating shaft, a cam bracket, a cam rotating shaft, a cam wrench and a torsion spring; the printing head unlocking mechanism comprises a carbon ribbon switch, a left claw, a right claw, a claw rotating shaft and an extension spring. The invention can lead the ejection action of the carbon ribbon cartridge to lag behind the action of pressing the carbon ribbon switch, realizes the delayed ejection of the carbon ribbon cartridge, and solves the problem that the carbon ribbon can not be taken out due to the unevenness of the carbon ribbon in the prior art.)

1. A thermal printer capable of realizing delayed ejection of a carbon tape box comprises a printing head, a rack and the carbon tape box, and is characterized by further comprising a carbon tape box ejection mechanism, a printing head lifting mechanism and a printing head unlocking mechanism;

the carbon ribbon cartridge ejection mechanism comprises an ejection support, an ejection block, an elastic sheet and a compression spring, the ejection support is fixed on the frame, the elastic sheet and the compression spring are installed inside the ejection support, one end of the compression spring is arranged on the ejection support, the other end of the compression spring is ejected on the ejection block, and the elastic sheet is fixed on the ejection block; when the carbon ribbon box is in a locking state, the elastic sheet is clamped inside the ejection support, the ejection block is in an unexpelled state, and the compression spring is compressed; when the elastic sheet is pressed to deform downwards, the elastic sheet is separated from the ejection support, and the compression spring ejects the ejection block;

the printing head lifting mechanism comprises a printing head support, a printing head rotating shaft, a cam support, a cam rotating shaft, a cam wrench and a torsion spring, wherein the printing head and the printing head support are connected to the rack through the printing head rotating shaft; the end part of the printing head support is also provided with a riveting shaft and a bending part, and when the printing head support falls down, the bending part drops above the elastic sheet;

the printing head unlocking mechanism comprises a carbon ribbon switch, a left claw, a right claw, a claw rotating shaft and an extension spring, the left claw and the right claw are mounted on the inner side of the rack through the claw rotating shaft, the carbon ribbon switch is fixed on the claw rotating shaft, and the left claw or the right claw is fixedly connected with the carbon ribbon switch; one end of the extension spring is fixed on the rack, and the other end of the extension spring is fixed on the left claw or the right claw; the carbon tape clamp presses a lock tongue of the carbon tape box, and the left claw and the right claw hook the squeeze riveting shaft.

2. The thermal printer capable of realizing delayed ejection of the carbon tape cartridge as claimed in claim 1, wherein a supply cylinder and a recovery cylinder for mounting the carbon tape are arranged in the carbon tape cartridge, a cartridge mounting opening is arranged on the frame, and a mounting shaft matched with the supply cylinder and the recovery cylinder is arranged on the inner side of the frame.

3. The thermal printer capable of realizing delayed ejection of a carbon tape cassette according to claim 1, wherein the elastic sheet is fixed on the ejection block by means of an adhesive.

4. The thermal printer capable of realizing delayed ejection of a carbon ribbon cartridge as claimed in claim 1, wherein one end of the cam rotating shaft has a flat position, the middle opening of the cam wrench is inserted into the flat position of the cam shaft, and one end of the cam wrench is fixed with the cam bracket through a screw.

5. The thermal printer capable of realizing delayed ejection of a carbon tape cartridge as claimed in claim 1, wherein a pin is provided on the left hook or the right hook, a groove is provided on the pin, and one end of the extension spring is fixed in the groove.

6. The thermal printer capable of realizing delayed ejection of the carbon tape cartridge as claimed in claim 1, wherein the carbon tape switch is fixed on the flat position of the carbon tape rotating shaft, and the left hook claw or the right hook claw is fixedly connected with the carbon tape switch through a screw.

Technical Field

The present invention relates to a thermal printer, and more particularly, to a thermal printer capable of realizing delayed ejection of a thermal ribbon cartridge.

Background

The thermal printer is internally provided with a plurality of components such as a carbon tape box and a printing head, and the internal structure is complex. When the thermal printer is in a printing state, the printing head presses on the carbon belt, and the carbon belt is tightly pressed by the printing head. In order to take out the carbon tape cassette conveniently, the printing head in the prior art is designed to be capable of lifting in the thermal printer, and when the printing head is unlocked, the printing head can fall down, and the carbon tape cassette is ejected. Because the carbon tape is torn out in the printing process, the carbon tape on the carbon tape box is in a loose and uneven state, and when the printing head is unlocked, the carbon tape box is easy to interfere and wind with parts in the machine when being popped out, so that the carbon tape box is difficult to take out.

Disclosure of Invention

The invention aims to solve the technical problem of providing a thermal printer capable of realizing delayed ejection of a carbon tape box, easily realizing delayed automatic ejection of the carbon tape box and avoiding the problem of interference winding.

The technical scheme adopted by the invention for solving the technical problems is as follows: the thermal printer capable of realizing delayed ejection of the carbon tape box comprises a printing head, a rack and the carbon tape box, and further comprises a carbon tape box ejection mechanism, a printing head lifting mechanism and a printing head unlocking mechanism;

the carbon ribbon cartridge ejection mechanism comprises an ejection support, an ejection block, an elastic sheet and a compression spring, the ejection support is fixed on the frame, the elastic sheet and the compression spring are installed inside the ejection support, one end of the compression spring is arranged on the ejection support, the other end of the compression spring is ejected on the ejection block, and the elastic sheet is fixed on the ejection block; when the carbon ribbon box is in a locking state, the elastic sheet is clamped inside the ejection support, the ejection block is in an unexpelled state, and the compression spring is compressed; when the elastic sheet is pressed to deform downwards, the elastic sheet is separated from the ejection support, and the compression spring ejects the ejection block;

the printing head lifting mechanism comprises a printing head support, a printing head rotating shaft, a cam support, a cam rotating shaft, a cam wrench and a torsion spring, wherein the printing head and the printing head support are connected to the rack through the printing head rotating shaft; the end part of the printing head support is also provided with a riveting shaft and a bending part, and when the printing head support falls down, the bending part drops above the elastic sheet;

the printing head unlocking mechanism comprises a carbon ribbon switch, a left claw, a right claw, a claw rotating shaft and an extension spring, the left claw and the right claw are mounted on the inner side of the rack through the claw rotating shaft, the carbon ribbon switch is fixed on the claw rotating shaft, and the left claw or the right claw is fixedly connected with the carbon ribbon switch; one end of the extension spring is fixed on the rack, and the other end of the extension spring is fixed on the left claw or the right claw; the carbon tape clamp presses a lock tongue of the carbon tape box, and the left claw and the right claw hook the squeeze riveting shaft.

In the above scheme, a supply cylinder and a recovery cylinder for mounting the carbon ribbon are arranged in the carbon ribbon box, a carbon ribbon box mounting opening is formed in the rack, and a mounting shaft matched with the supply cylinder and the recovery cylinder is arranged on the inner side of the rack.

In the above scheme, the elastic sheet is fixed on the ejection block in a back adhesive mode.

In the scheme, one end of the cam rotating shaft is provided with a flat position, the middle opening of the cam wrench is inserted into the flat position of the cam shaft, and one end of the cam wrench is fixed with the cam support through a screw.

In the above scheme, a pin is arranged on the left claw or the right claw, a groove is formed in the pin, and one end of the extension spring is fixed in the groove.

In the above scheme, the carbon ribbon switch is fixed on the flat position of the carbon ribbon rotating shaft, and the left hook claw or the right hook claw is fixedly connected with the carbon ribbon switch through a screw.

The thermal printer capable of realizing delayed ejection of the carbon tape box has the following beneficial effects:

when the carbon tape box needs to be taken out, the carbon tape switch is pressed down, the left hook claw and the right hook claw rotate synchronously and lift up, the limit on the squeeze rivet shaft is removed, the printing head rotates downwards under the action of the torsion spring, and the carbon tape box cannot be ejected by the ejection block at the moment because the elastic sheet is clamped inside the ejection support. In the falling process of the printing head, a motor or other devices in the thermal printer can tighten the carbon ribbon, before the bending part drops above the elastic sheet, the carbon ribbon is flattened, the elastic sheet can be pressed down by the bending part at the moment, and the carbon ribbon box is ejected by the ejection block after the elastic sheet is pressed. The invention can lead the ejection action of the carbon ribbon cartridge to lag behind the action of pressing the carbon ribbon switch, realizes the delayed ejection of the carbon ribbon cartridge, and solves the problem that the carbon ribbon can not be taken out due to the unevenness of the carbon ribbon in the prior art.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1-1 is a schematic structural view of a carbon ribbon cartridge;

fig. 1-2 are cross-sectional views of a carbon ribbon cartridge;

FIG. 2 is a schematic diagram of the internal structure of a thermal printer capable of achieving delayed ejection of a thermal ribbon cartridge according to the present invention;

FIG. 3-1 is a schematic view of a ribbon cartridge ejection mechanism;

FIG. 3-2 is a schematic view of the spring in an un-ejected state;

fig. 3-3 are schematic views of the spring in the ejected state;

FIG. 4-1 is a schematic view of the mounting position of the print head release mechanism;

FIG. 4-2 is a schematic view of another angle of the mounting position of the print head release mechanism;

4-3 are schematic structural views of a print head unlocking mechanism;

FIG. 5-1 is a schematic view of a print head raising mechanism;

FIG. 5-2 is a schematic view of another angle of the print head raising mechanism;

FIG. 6-1 is a schematic view of the squeeze riveter shaft in contact with the left finger;

FIG. 6-2 is a schematic view of the squeeze rivet shaft being snapped into the left finger;

FIG. 6-3 is a schematic view of the squeeze riveter shaft being secured by the left finger;

FIG. 7-1 is a schematic view of the installation of a carbon ribbon cartridge;

FIG. 7-2 is a schematic view of the locking tongue of the carbon tape cartridge just prior to contact with the carbon tape switch;

FIG. 7-3 is a schematic view of the carbon ribbon cartridge in place;

FIG. 8-1 is a schematic view of a ribbon with a printhead raised;

FIG. 8-2 is a schematic view of a ribbon in a relaxed state after a printhead drop;

FIG. 9-1 is a schematic view of the operation of the carbon tape cartridge when removed;

FIG. 9-2 is a schematic view of the bending portion being located above the elastic sheet;

fig. 9-3 is a schematic view of the bending portion contacting the elastic sheet.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in fig. 1-1 and fig. 2, the thermal printer capable of realizing the delayed ejection of the thermal ribbon cartridge according to the present invention includes a printhead 6, a frame 2, a thermal ribbon cartridge 1, a thermal ribbon cartridge ejection mechanism 3, a printhead lifting mechanism 5, and a printhead unlocking mechanism 4.

As shown in fig. 3-1, 3-2, and 3-3, the thermal transfer ribbon cartridge ejecting mechanism 3 includes an ejecting bracket 301, an ejecting block 303, an elastic sheet 302, and a compression spring 304. The ejection bracket 301 is fixed on the frame 2, the spring sheet 302 and the compression spring 304 are arranged inside the ejection bracket 301, one end of the compression spring 304 is arranged on the ejection bracket 301, the other end of the compression spring is abutted against the ejection block 303, and the spring sheet 302 is fixed on the ejection block 303; when the carbon tape box 1 is in a locked state, the elastic sheet 302 is clamped inside the ejection bracket 301, the ejection block 303 is in an unexpelled state, and the compression spring 304 is compressed; when the elastic sheet 302 is pressed to deform downwards, the elastic sheet 302 is separated from the ejection bracket 301, and the compression spring 304 ejects the ejection block 303.

As shown in fig. 5-1 and 5-2, the print head lifting mechanism 5 includes a print head support 501, a print head rotating shaft 509, a cam support 504, a cam rotating shaft 505, a cam wrench 506 and a torsion spring 511, the print head 6 and the print head support 501 are connected to the frame 2 through the print head rotating shaft 509, the cam support 504 is connected to the frame 2 through the cam rotating shaft 505, the cam support 504 is further provided with a connecting shaft 503, the connecting shaft 503 passes through an arc hole 502 of the print head support 501, the print head support 501 is driven to rotate when the cam support 504 moves, the cam wrench 506 is fixedly connected to the cam support 504, one end of the torsion spring 511 is fixed to the frame 2, and the other end of the torsion spring. The end of the print head support 501 is further provided with a rivet pressing shaft 510 and a bending part 508, and when the print head support 501 falls, the bending part 508 falls on the elastic sheet 302.

As shown in fig. 4-1, 4-2, and 4-3, the print head unlocking mechanism 4 includes a carbon ribbon switch 401, a left claw 402, a right claw 403, a claw rotating shaft 404, and an extension spring 406, the left claw 402 and the right claw 403 are installed inside the frame 2 through the claw rotating shaft 404, the carbon ribbon switch 401 is fixed on the claw rotating shaft 404, and the left claw 402 or the right claw 403 is fixedly connected to the carbon ribbon switch 401; one end of the extension spring 406 is fixed on the frame 2, and the other end is fixed on the left claw 402 or the right claw 403; the carbon tape 101 is clamped and pressed against the latch tongue 104 of the carbon tape cartridge 1, and the left hook jaw 402 and the right hook jaw 403 hook the squeeze riveting shaft 510.

When the cam wrench 506 is pressed downward, the cam bracket 504 is rotated counterclockwise, and the cam bracket 504 drives the print head bracket 501 to rotate clockwise, as shown in fig. 6-1. As shown in fig. 6-2, the squeeze-rivet shaft 510 of the print head bracket 501 meets the left finger 402 during the movement to lift the left finger 402. As shown in fig. 6-3, the print head 6 always has a downward rotation tendency under the action of the torsion spring 511, and when the print head bracket 501 moves to a certain position, the inner edge of the left hook 402 will block the print head bracket 501. Similarly, when the carbon ribbon switch 401 is pressed, the left hook 402 rotates counterclockwise, and the print head 6 rotates clockwise under the action of the torsion spring 511, so that the lock between the rivet shaft 510 and the left hook 402 is unlocked.

As shown in fig. 7-1, in the state before the carbon tape 101 is loaded, the whole plane of the carbon tape 101 is flat, and the carbon tape cartridge 1 can be directly inserted into the movement as the carbon tape 101 has the same shape and the opening of the movement assembly. As shown in fig. 7-2, during the insertion of the carbon ribbon cartridge 1, the inclined surface of the latch 104 on the carbon ribbon cartridge 1 will abut against the inclined surface of the carbon ribbon switch 401, so as to generate an upward component force to jack up the carbon ribbon switch 401 and rotate upward. As shown in fig. 7-3, when the carbon ribbon cartridge 1 continues to advance, the inner edge of the carbon ribbon cartridge 1 pushes the ejector block 303 to move inward, and when the ejector block 303 moves to a certain position, the compressed spring plate 302 will normally bounce to block the ejector block 303; meanwhile, the carbon ribbon switch 401 rotates downward under the action of the extension spring 406 to clamp the carbon ribbon cartridge 1, thereby realizing the rapid fixation of the carbon ribbon cartridge 1.

After the carbon tape box 1 is loaded, if printing is needed, the printing head 6 needs to be lifted, and after the handle position of the cam wrench 506 is pressed, the printing head 6 can be lifted and fixed at the position shown in fig. 8-1, at the moment, the carbon tape 101 is drawn out from the carbon tape box 1, and the position of the carbon tape 101 is also shown in the figure. At this time, if the print head 6 is unlocked, the carbon tape 101 is in a loosely wrinkled state inside and cannot be directly taken out, as shown in fig. 8-2.

As shown in fig. 9-1, when the carbon tape cartridge 1 needs to be taken out, the carbon tape switch 401 is pressed, the left hook 402 and the right hook 403 rotate and lift up synchronously, the limit on the riveting shaft 510 is released, the print head 6 rotates downwards under the action of the torsion spring 511, and at this time, as shown in fig. 9-2, the carbon tape cartridge 1 cannot be ejected by the ejector block 303 because the elastic piece 302 is clamped inside the ejector bracket 301. During the falling of the print head 6, the motor inside the thermal printer tightens the carbon ribbon 101, and before the bending portion 508 drops above the elastic sheet 302, the carbon ribbon 101 is flattened, at this time, the bending portion 508 presses the elastic sheet 302, as shown in fig. 9-3, and after the elastic sheet 302 is pressed, the ejecting block 303 ejects the carbon ribbon cartridge 1.

Further, a supply cylinder 102 and a recovery cylinder 103 for mounting the carbon ribbon 101 are arranged in the carbon ribbon cartridge 1, a carbon ribbon cartridge mounting opening is formed in the frame 2, a mounting shaft matched with the supply cylinder 102 and the recovery cylinder 103 is arranged on the inner side of the frame 2, and the recovery cylinder 103 is driven to rotate by a motor, so that the rolling action can be realized.

Further, the elastic sheet 302 is fixed on the ejection block 303 by an adhesive-backed manner.

Furthermore, one end of the cam rotating shaft 505 is provided with a flat position, a middle opening of the cam wrench 506 is inserted into the flat position of the cam shaft, and one end of the cam wrench 506 is fixed with the cam bracket 504 through a screw 507.

Furthermore, a pin 407 is arranged on the left claw 402 or the right claw 403, a groove is arranged on the pin 407, and one end of the extension spring 406 is fixed in the groove.

Further, the carbon ribbon switch 401 is fixed on a flat position 408 of the rotating shaft of the carbon ribbon 101, and the left hook claw 402 or the right hook claw 403 is fixedly connected with the carbon ribbon switch 401 through a screw 405.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.