阅读说明：本技术 保障有效打印效果的泄压机构及开合式热转印打印机 (Pressure relief mechanism and open-close type thermal transfer printer of guarantee effective printing effect ) 是由 谭佳武 高卫民 唐国初 于 2021-07-15 设计创作，主要内容包括：本发明涉及一种保障有效打印效果的泄压机构及开合式热转印打印机,泄压机构用于分别与开合式热转印打印机的进纸胶辊上方的压力轮组以及打印胶辊上方的打印头连接,泄压机构包括第一浮动顶推机构和第二浮动顶推机构,第一浮动顶推机构装配于打印机的机体中,并与压力轮组连接,用于驱使压力轮组上下浮动,以使压力轮组向下移动进纸胶辊,或向上移动远离,第二浮动顶推机构与打印头连接,用于驱使打印头上下浮动,以使打印头的打印部向下移动靠近打印胶辊,或向上移动远离,且压力轮组和打印头的浮动方向相反。优点：打印时,纸带只受打印头与打印胶辊的正压力,打印效果较好；退纸及非打印状态时,打印头抬起,打印胶辊延长了寿命。(The invention relates to a pressure relief mechanism for ensuring effective printing effect and an open-close type thermal transfer printer, wherein the pressure relief mechanism is used for being respectively connected with a pressure wheel set above a paper feeding rubber roller and a printing head above the printing rubber roller of the open-close type thermal transfer printer, the pressure relief mechanism comprises a first floating pushing mechanism and a second floating pushing mechanism, the first floating pushing mechanism is assembled in a printer body of the printer and connected with the pressure wheel set and used for driving the pressure wheel set to float up and down so as to enable the pressure wheel set to move the paper feeding rubber roller downwards or move the paper feeding rubber roller upwards and far away, the second floating pushing mechanism is connected with the printing head and used for driving the printing head to float up and down so as to enable a printing part of the printing head to move downwards and close to the printing rubber roller or move upwards and far away, and the floating directions of the pressure wheel set and the printing head are opposite. The advantages are that: when printing, the paper tape is only under the positive pressure of the printing head and the printing rubber roller, so that the printing effect is good; when the paper is ejected and the printing is not in the printing state, the printing head is lifted, and the service life of the printing rubber roller is prolonged.)

1. The utility model provides a pressure release mechanism of effect is effectively printed in guarantee for respectively with the pressure wheelset (2) of paper feed rubber roll (1) top of open-close type thermal transfer printer and print beating printer head (4) of rubber roll (3) top and be connected its characterized in that: pressure release mechanism includes the unsteady thrustor of first unsteady thrustor mechanism and second, the first unsteady thrustor of floating assembles in the organism of printer, and with pressure wheelset (2) are connected, are used for ordering about pressure wheelset (2) fluctuate, so that pressure wheelset (2) downstream paper feed rubber roll (1), or upward movement keeps away from, the unsteady thrustor of second with beat printer head (4) and be connected, be used for ordering about beat printer head (4) fluctuate, so that the printing portion downstream that beats printer head (4) is close to print rubber roll (3), or upward movement keeps away from, just the unsteady opposite direction of pressure wheelset (2) and beat printer head (4).

2. A pressure relief mechanism for ensuring effective printing according to claim 1, further comprising: the first floating pushing mechanism comprises a first rotating shaft (51), a first cam assembly (52) and a driving device, wherein the first rotating shaft (51) is transversely and rotatably assembled in a rack of a printer and is parallel to a wheel shaft of the pressure wheel set (2), the first cam assembly (52) is provided with two groups and is respectively assembled at two ends of the first rotating shaft (51), the first cam assembly (52) is respectively connected with the wheel shaft of the pressure wheel set (2), and the driving device is in transmission connection with the first rotating shaft (51) and is used for driving the first rotating shaft (51) to rotate so as to drive the first cam assembly (52) to rotate in a linkage manner, so that the pressure wheel set (2) is driven to float up and down.

3. A pressure relief mechanism for ensuring effective printing according to claim 2, further comprising: the first cam assembly (52) comprises a first cam (521) and a first pushing block (522), the first cam (521) is assembled at the corresponding end of the first rotating shaft (51), the first pushing block (522) is positioned above the corresponding first cam (521), a kidney-shaped hole transversely penetrating through the first cam is formed in the first pushing block, the end part of the paper feeding rubber roller (1) penetrates through the kidney-shaped hole of the corresponding first pushing block (522) and can move up and down relative to the kidney-shaped hole, the lower end of the first pushing block (522) is in contact with the upper part of the first cam (521), the upper end of the first pushing block is supported at the lower part of the rotating shaft wheel set of the pressure roller (2) and can rotate relatively, the driving device drives the first rotating shaft (51) to drive the first cam (521) to rotate, and the first pushing block (522) is driven by the first cam (521) to move up and down, thereby driving the pressure wheel set (2) to float up and down.

4. A pressure relief mechanism for ensuring effective printing according to claim 3, further comprising: the upper end of the first pushing block (522) is provided with a circular arc-shaped concave notch, and the lower part of the corresponding end of the first rotating shaft (51) is supported in the concave notch.

5. A pressure relief mechanism for ensuring effective printing according to any of claims 2 to 4, wherein: the second pushes away mechanism that floats includes second pivot (61) and second cam group spare (62), the horizontal rotatable assembly of second pivot (61) is in the frame of printer, and with it is parallel to print rubber roll (3), second cam group spare (62) are equipped with two sets ofly, and assemble respectively in the both ends of second pivot (61), second cam group spare (62) respectively with the lower part at printer head (4) both ends corresponds, drive arrangement with second pivot (61) transmission is connected, is used for ordering about second pivot (61) is rotatory, thereby drives second cam group spare (62) linkage is rotatory, order about in second cam group spare (62) the rotatory process pressure wheelset (2) float from top to bottom.

6. A pressure relief mechanism for ensuring effective printing according to claim 5, further comprising: the second cam component (62) comprises a second cam (621) and a second pushing block (622), the second cam (621) is assembled at the corresponding end of the second rotating shaft (61), the second pushing block (622) can be assembled on a sliding seat (8) matched with the two ends of the printer frame in a vertically moving mode and is located above the second cam (621), the lower end of the second pushing block (622) is in contact with the upper portion of the second cam (621) correspondingly, the upper portion of the second pushing block is supported on the lower portion of the corresponding end of the printing head (4), the driving device drives the second rotating shaft (61) to drive the second cam (621) to rotate, and the second cam (621) drives the second pushing block (622) to vertically move so as to drive the printing head (4) to vertically float.

7. The pressure relief mechanism for ensuring effective printing according to claim 6, further comprising: the second cam assembly (62) further comprises a support roller (623), the support roller (623) is rotatably assembled at the upper end of the second ejector block (622), and the second ejector block (622) is supported at the lower part of the corresponding end of the printing head (4) through the support roller (623) at the upper part.

8. A pressure relief mechanism for ensuring effective printing according to claim 5, further comprising: the driving device comprises a motor (71) and three gears (72), wherein two gears (72) are respectively assembled at the same ends of the first rotating shaft (51) and the second rotating shaft (61), the motor (71) is assembled in a frame of the printer, a motor shaft of the motor transversely extends, and the rest gear (72) is assembled on the motor shaft of the motor (71) and is respectively meshed with the two gears (72).

9. An open-close type thermal transfer printer is characterized in that: comprising a pressure relief mechanism for ensuring effective printing according to any of claims 1 to 8.

Technical Field

The invention relates to the technical field of printers, in particular to a pressure relief mechanism for guaranteeing effective printing effect and an opening-closing type thermal transfer printer.

Background

The printing rubber roller of the open-close type thermal transfer printer is mostly a fixed wheel, and in the prior art, the positive pressure of the printing rubber roller and the printing head is far greater than the positive pressure of the paper feeding rubber roller and the floating wheel thereof. When the paper tape is in a printing working state, the paper tape is conveyed forwards by virtue of the pressure difference between the paper tape and the paper tape, and the printing effect is greatly influenced due to the fact that the two ends of the paper tape are stressed; the printing head is also under high elastic pressure in non-working time, the rubber roller is easy to deform, the printing effectiveness can be influenced, the paper feeding wheel of the printer is a floating wheel fixed at the paper feeding position, the paper feeding wheel is pressed downwards by a spring, and the positive pressure provided by the paper feeding wheel is a great obstacle when a user replaces the medium to discharge paper again.

Disclosure of Invention

The invention aims to solve the technical problem of providing a pressure relief mechanism and an opening-closing type thermal transfer printer which guarantee effective printing effect, and effectively overcomes the defects of the prior art.

The technical scheme for solving the technical problems is as follows:

the pressure relief mechanism comprises a first floating pushing mechanism and a second floating pushing mechanism, wherein the first floating pushing mechanism is assembled in a printer body and connected with the pressure wheel set and used for driving the pressure wheel set to float up and down so as to enable the pressure wheel set to move the paper feeding rubber roller downwards or move upwards and keep away, the second floating pushing mechanism is connected with the printing head and used for driving the printing head to float up and down so as to enable a printing part of the printing head to move downwards and be close to the printing rubber roller or move upwards and keep away, and the floating directions of the pressure wheel set and the printing head are opposite.

On the basis of the technical scheme, the invention can be further improved as follows.

Further, the first floating pushing mechanism comprises a first rotating shaft, a first cam assembly and a driving device, the first rotating shaft is transversely and rotatably assembled in a rack of the printer and is parallel to a wheel shaft of the pressure wheel set, the first cam assembly is provided with two groups and is respectively assembled at two ends of the first rotating shaft, the first cam assembly is respectively connected with the wheel shaft of the pressure wheel set, and the driving device is in transmission connection with the first rotating shaft and is used for driving the first rotating shaft to rotate so as to drive the first cam assembly to rotate in a linkage manner, so that the pressure wheel set is driven to float up and down.

Further, the first cam assembly comprises a first cam and a first pushing block, the first cam is assembled at the corresponding end of the first rotating shaft, the first pushing block is located above the corresponding first cam, a waist circular hole transversely penetrating through the first pushing block is formed in the first pushing block, the end portion of the paper feeding rubber roll penetrates through the corresponding waist circular hole of the first pushing block and can move up and down relative to the waist circular hole, the lower end of the first pushing block is in contact with the upper portion of the first cam, the upper end of the first pushing block is supported at the lower portion of the rotating shaft of the pressure wheel set and can rotate relative to the first pushing block, the driving device drives the first rotating shaft to drive the first cam to rotate, and the first cam drives the first pushing block to move up and down so as to drive the pressure wheel set to float up and down.

Further, the upper end of the first pushing block is provided with a circular arc-shaped concave notch, and the lower part of the corresponding end of the first rotating shaft is supported in the concave notch.

Further, the second floating pushing mechanism comprises a second rotating shaft and a second cam assembly, the second rotating shaft is transversely and rotatably assembled in a rack of the printer and is parallel to the printing rubber roller, two groups of the second cam assemblies are arranged and are respectively assembled at two ends of the second rotating shaft, the second cam assemblies respectively correspond to the lower parts of two ends of the printing head, the driving device is in transmission connection with the second rotating shaft and is used for driving the second rotating shaft to rotate so as to drive the second cam assembly to rotate in a linkage manner, and the pressure wheel set is driven to float up and down in the rotating process of the second cam assembly.

Further, the second cam assembly comprises a second cam and a second pushing block, the second cam is assembled at the corresponding end of the second rotating shaft, the second pushing block can be assembled on sliding seats matched with the two ends of the printer frame in a vertically movable mode and is located above the corresponding second cam, the lower end of the second pushing block is in contact with the upper portion of the corresponding second cam, the upper portion of the second pushing block is supported on the lower portion of the corresponding end of the printing head, the driving device drives the second rotating shaft to drive the second cam to rotate, and the second cam drives the second pushing block to vertically move so as to drive the printing head to vertically float.

Further, the second cam assembly further includes a support roller rotatably mounted to an upper end of the second ejector block, and the second ejector block is supported to a lower portion of a corresponding end of the print head by the support roller at an upper portion thereof.

Further, the driving device comprises a motor and three gears, wherein two of the gears are respectively assembled at the same end of the first rotating shaft and the second rotating shaft, the motor is assembled in a frame of the printer, a motor shaft of the motor extends transversely, and the rest gear is assembled on the motor shaft of the motor and is respectively meshed with two of the gears.

The beneficial effects are that: when printing, the paper tape is only under the positive pressure of the printing head and the printing rubber roller; the printing speed is not influenced by other additional mechanisms, and the printing effect is good; when the paper is ejected and the paper is not printed, the whole transmission is based on the speed of the paper feeding rubber roller, the printing head is lifted, the printing rubber roller is protected, and the service life is prolonged.

Still provide an open-close type thermal transfer printer, including pressure release mechanism.

Drawings

FIG. 1 is a schematic view of a partial structure of a pressure relief mechanism for ensuring effective printing effect in a printer according to the present invention;

fig. 2 is a schematic view of a partial structure of a pressure relief mechanism for ensuring effective printing effect in a printer according to the present invention (the view is provided with the driving of the rubber roller removed on the basis of fig. 1).

In the drawings, the components represented by the respective reference numerals are listed below:

1. feeding a paper rubber roller; 2. a pressure wheel set; 3. printing a rubber roller; 4. a print head; 8. a slide base; 51. a first rotating shaft; 52. a first cam assembly; 61. a second rotating shaft; 62. a second cam assembly; 71. a motor; 72. a gear; 521. a first cam; 522. a first ejector pad; 621. a second cam; 622. a second ejector pad; 623. and supporting the roller.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

Example 1

As shown in fig. 1 and 2, the embodiment provides a pressure relief mechanism for ensuring effective printing effect, which is used to connect with a pressure wheel set 2 above a paper feeding rubber roller 1 and a printing head 4 above a printing rubber roller 3 of an opening and closing thermal transfer printer respectively, the pressure relief mechanism comprises a first floating pushing mechanism and a second floating pushing mechanism, the first floating pushing mechanism is assembled in the printer body and connected with the pressure wheel set 2, used for driving the pressure wheel set 2 to float up and down so as to enable the pressure wheel set 2 to move the paper feeding rubber roller 1 downwards, or move upwards and away from the printing head, the second floating pushing mechanism is connected with the printing head 4 and is used for driving the printing head 4 to float up and down, so that the printing part of the printing head 4 moves downwards to be close to the printing rubber roller 3 or moves upwards to be far away from the printing rubber roller, and the floating directions of the pressure wheel group 2 and the printing head 4 are opposite.

Generally, the paper feeding rubber roller 1 and the printing rubber roller 3 are linked with a belt transmission pair through a set of motor (as shown in fig. 1), and the whole operation process is as follows:

when the printing action is executed, the pressure wheel set 2 is jacked up by the first floating jacking mechanism, so that the pressure wheel of the pressure wheel set 2 leaves the upper part of the paper feeding rubber roller 1, meanwhile, the second floating jacking mechanism and the printing part of the printing head 4 move downwards to be close to the printing rubber roller 3, and at the moment, the paper tape is only subjected to the positive pressure of the printing part of the printing head 4 and the printing rubber roller 3; the printing speed is not influenced by other additional mechanisms, and the printing effect is good;

after the device prints the cut-off paper tape, when the paper returning action needs to be executed, the printing head 4 is jacked up by the second floating jacking mechanism, so that the printing part is separated from the printing rubber roller 3, meanwhile, the first floating jacking mechanism and the pressure wheel set 2 move downwards, so that the pressing wheel of the pressure wheel set 2 is close to the upper part of the paper feeding rubber roller 1, the whole transmission of the paper is subject to the speed of the paper feeding rubber roller 1, the printing rubber roller 3 is protected, and the service life of the printing rubber roller is prolonged.

As a preferred embodiment, the first floating pushing mechanism includes a first rotating shaft 51, a first cam assembly 52 and a driving device, the first rotating shaft 51 is transversely and rotatably assembled in a frame of the printer and is parallel to a wheel shaft of the pressure wheel set 2, two sets of the first cam assemblies 52 are provided and respectively assembled at two ends of the first rotating shaft 51, the first cam assemblies 52 are respectively connected with the wheel shaft of the pressure wheel set 2, and the driving device is in transmission connection with the first rotating shaft 51 and is used for driving the first rotating shaft 51 to rotate, so as to drive the first cam assemblies 52 to rotate in a linkage manner, thereby driving the pressure wheel set 2 to float up and down.

In this embodiment, the driving device drives the first rotating shaft 51 to rotate, and drives the first cam assembly 52 to swing, so that the pressure wheel set 2 floats up and down, and the overall structure design is simple and reasonable.

More specifically, the first cam assembly 52 includes a first cam 521 and a first pushing block 522, the first cam 521 is assembled at a corresponding end of the first rotating shaft 51, the first pushing block 522 is located above the corresponding first cam 521, and a circular waist hole transversely penetrating through the first cam 521 is formed in the first pushing block 522, an end of the paper feeding rubber roller 1 penetrates through the circular waist hole of the corresponding first pushing block 522 and can move up and down relative to the circular waist hole, a lower end of the first pushing block 522 is in contact with an upper portion of the first cam 521, an upper end of the first pushing block 522 is supported at a lower portion of the rotating shaft of the pressure wheel set 2 and can rotate relative to the rotating shaft, the driving device drives the first rotating shaft 51 to drive the first cam 521 to rotate, and the first cam 521 drives the first pushing block 522 to move up and down, so as to drive the pressure wheel set 2 to float up and down.

In this scheme, first pivot 51 is being driven rotatory in-process by drive arrangement, and first cam 521 is rotatory along with, and in rotatory in-process, first cam 521 can upwards extrude first ejector pad 522 and drive pressure wheel group 2 rebound, or moves down under the effect of self gravity to realize the fluctuation of pressure wheel group 2, structural design is compacter, and the operation is stable.

Preferably, the first pushing block 522 has an upper end provided with a circular arc-shaped recess, and a lower portion of the corresponding end of the first rotating shaft 51 is supported by the recess.

In this scheme, the design of undercut for first pivot 51 supports all the time on the diapire of undercut, and, the contact is inseparable between the two, and appearance profile phase-match can avoid the problem that first pivot 51 both sides rocked.

As a preferred embodiment, the second floating pushing mechanism includes a second rotating shaft 61 and a second cam assembly 62, the second rotating shaft 61 is transversely and rotatably assembled in a frame of the printer and is parallel to the printing rubber roller 3, two sets of the second cam assemblies 62 are provided and are respectively assembled at two ends of the second rotating shaft 61, the second cam assemblies 62 respectively correspond to lower portions of two ends of the printing head 4, the driving device is in transmission connection with the second rotating shaft 61 and is used for driving the second rotating shaft 61 to rotate, so as to drive the second cam assemblies 62 to rotate in a linkage manner, and the pressure wheel set 2 is driven to float up and down during the rotation of the second cam assemblies 62.

In this embodiment, the driving device can drive the first cam assembly 52 and the second cam assembly 62 to synchronously swing, and in the swinging process, one position is high, the other position is low, and the swinging is performed alternately, so that the pressure wheel set 2 and the printing head 4 can float upwards and downwards alternately, and paper is guaranteed to be conveyed only under the action of the printing rubber roller 3 or the paper feeding rubber roller 1 all the time, and the design is ingenious.

As a preferred embodiment, the second cam assembly 62 includes a second cam 621 and a second pushing block 622, the second cam 621 is mounted at a corresponding end of the second rotating shaft 61, the second pushing block 622 is mounted on a sliding seat 8 adapted at two ends of the printer frame and capable of moving up and down and is located above the corresponding second cam 621, a lower end of the second pushing block 622 contacts with an upper portion of the corresponding second cam 621, an upper portion of the second pushing block 622 is supported at a lower portion of a corresponding end of the print head 4, the driving device drives the second rotating shaft 61 to drive the second cam 621 to rotate, and the second cam 621 drives the second pushing block 622 to move up and down, thereby driving the print head 4 to float up and down.

In this embodiment, the second cam 621 rotates along with the second rotating shaft 61 in the process of being driven by the driving device to rotate, and in the rotating process, the second cam 621 can extrude the second pushing block 622 upwards to drive the printing head 4 to move upwards, or the printing head 4 moves downwards under the action of its own gravity, so that the printing head 4 floats upwards and downwards, and the structural design is compact and the operation is stable.

In the above solution, the slide base 8 is actually a sleeve structure that is through from top to bottom, the second pushing block 622 is disposed in the sleeve structure, the upper end and the lower end of the second pushing block are respectively in contact with the lower portion of the frame corresponding end of the print head 4 and the second cam 621, and the sleeve structure is connected and fixed with the frame of the printer.

More specifically, the second cam assembly 62 further includes a support roller 623, the support roller 623 is rotatably mounted to an upper end of the second ejector 622, and the second ejector 622 is supported by a lower portion of a corresponding end of the print head 4 via the upper support roller 623.

In this scheme, the design of supporting roller 623 makes the contact change from sliding to rolling between the upper end of print head 4 and second ejector 622, and the effectual frictional force that has reduced the energy consumption to a certain extent, has also reduced the wearing and tearing of spare part.

Preferably, the driving device includes a motor 71 and three gears 72, wherein two of the gears 72 are respectively mounted on the same end of the first rotating shaft 51 and the second rotating shaft 61, the motor 71 is mounted in the frame of the printer with its motor shaft extending transversely, and the remaining one of the gears 72 is mounted on the motor shaft of the motor 71 and is respectively engaged with two of the gears 72.

In this scheme, the position of the first cam 521 and the second cam 621 is different, and when the driving device operates, the motor 71 drives the gear 72 connected with the motor to rotate, so as to realize the synchronous rotation of the other two gears 72, that is, the first rotating shaft 51 and the second rotating shaft 61 are driven to rotate synchronously, and because the position of the two cams is different, the two cams rotate in the same process, one eccentric part is in a high position and the other eccentric part is in a non-high position, so that the interactive up-and-down floating of the printing head 4 and the pressure wheel set 2 is realized, the whole driving device adopts the motor 71 to realize the linkage, the design is ingenious, and the cost and the energy consumption are reduced.

Example 2

An opening and closing type thermal transfer printer includes the pressure release mechanism in embodiment 1.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.