CN111452522B

CN111452522B - Ribbon transmission switching structure of printer

Info

Publication number: CN111452522B
Application number: CN202010279803.0A
Authority: CN
Inventors: 黄沛强; 陈国昌
Original assignee: Printers Jiangmen Co ltd
Current assignee: Printers Jiangmen Co ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2023-08-01
Anticipated expiration: 2040-04-10
Also published as: CN111452522A

Abstract

The invention discloses a color ribbon transmission switching structure of a printer, which comprises the following components: a housing including a cavity; the flip cover comprises a printing head and a cover body; the ribbon transmission mechanism comprises a motor, a first follow-up gear, a switching gear, a ribbon driving gear and a ribbon driving shaft, wherein the first follow-up gear is driven by the motor, the first follow-up gear, the switching gear and the ribbon driving gear can be meshed in sequence, and the ribbon driving shaft rotates in response to the driving of the motor; the ink ribbon switching mechanism comprises a cover body follow-up gear, a driven gear and a connecting rod, wherein the cover body follow-up gear comprises a plurality of teeth, the driven gear is meshed with the cover body follow-up gear, one end of the connecting rod is eccentrically connected to the driven gear, the other end of the connecting rod is rotatably connected with the switching gear, and the connecting rod can be separated from the meshing of the first follow-up gear and the ink ribbon driving gear under the cover body uncovering state. The invention aims to provide a ribbon transmission switching structure of a printer, which can reduce the ribbon damage probability and conveniently install a ribbon.

Description

Ribbon transmission switching structure of printer

Technical Field

The invention relates to the field of printers, in particular to a ribbon transmission switching structure of a printer.

Background

At present, when various printers on the market are installed with ribbon consumable materials, the turnover cover needs to be opened firstly, then the ribbon is tightened, and then the turnover cover is closed. The printing head is arranged in the flip cover, and the flip cover is covered at the moment, so that the color ribbon is in tension and is difficult to move under the influence of the static moment of the motor because the color ribbon is connected with the motor. At this moment, close flip, damage the ribbon with the ribbon easily and fracture even, improved higher operation requirement when using prior art's printer to constructor, still need constructor to maintain the ribbon consumptive material just can continue to use, consequently have the problem that the ribbon is damaged easily and the completion ribbon installation degree of difficulty is big.

Disclosure of Invention

The invention aims to at least solve one of the technical problems in the prior art, and provides a ribbon transmission switching structure of a printer, which can reduce the ribbon damage probability and facilitate ribbon installation.

The invention is realized by the following technical scheme:

according to an embodiment of the present invention, a ribbon drive switching structure of a printer at least includes: a housing including a cavity for mounting a ribbon; the turnover cover comprises a printing head and a cover body for covering the cavity, the cover body is rotatably connected to one side of the shell through a pivot piece, the printing head is convexly arranged on the lower side of the cover body, and the printing head stretches into the cavity in the cover body covering state; the ribbon transmission mechanism comprises a motor, a first follow-up gear, a switching gear, a ribbon driving gear and a ribbon driving shaft, wherein the first follow-up gear is driven by the motor, the first follow-up gear, the switching gear and the ribbon driving gear can be meshed in sequence, the ribbon driving shaft responds to the driving of the motor to rotate, and the ribbon driving gear and the ribbon driving shaft are respectively arranged at two sides of the cavity and are commonly used for installing a ribbon; the ribbon switching mechanism comprises a cover body follow-up gear, a driven gear and a connecting rod, wherein the cover body follow-up gear comprises a plurality of teeth which encircle the axis of the pivoting piece and are distributed, the driven gear is arranged on the shell and meshed with the cover body follow-up gear, one end of the connecting rod is eccentrically connected with the driven gear, the other end of the connecting rod is rotatably connected with the switching gear, and the connecting rod can drive the switching gear to be separated from the meshing of the first follow-up gear and the ribbon driving gear in a cover body cover opening state.

According to some embodiments of the invention, the connecting rod is provided with a long strip hole, the driven gear is provided with a limit cylinder, and the limit cylinder is slidably connected in the long strip hole.

According to some embodiments of the invention, the connecting rod comprises a first rod body and a second rod body hinged to each other, the first rod body is eccentrically connected to the driven gear, and the switching gear is rotatably connected to the second rod body.

According to some embodiments of the invention, the casing is provided with guide holes in a straight line, and the second rod body extends into the guide holes and can slide relative to the guide holes.

According to some embodiments of the invention, the ribbon drive mechanism further comprises an intermediate drive gear, the switch gear, the intermediate drive gear and the ribbon drive gear being sequentially meshed.

According to some embodiments of the invention, the housing is provided with a relief hole for accommodating the intermediate transmission gear therethrough, and the ribbon drive gear is disposed in the cavity.

According to some embodiments of the invention, the ribbon drive mechanism further comprises a cap, the cap is erected on the avoidance hole and detachably connected with the shell, and a pin shaft for rotatably connecting with the intermediate drive gear is arranged on the cap.

According to some embodiments of the invention, the ribbon drive mechanism further comprises a ribbon drive gear and a second follower gear, the ribbon drive shaft is coaxially provided with a ribbon drive gear, and the ribbon drive gear and the second follower gear are driven by a belt.

According to some embodiments of the invention, the first follower gear is belt driven with the motor.

According to some embodiments of the invention, the cover is provided with a hook on a side opposite to the connection pivot for engagement with the housing when the cover is completely closed.

An embodiment of a ribbon drive switching structure of a printer according to the present invention has at least the following advantages: the printer with the ribbon transmission switching structure has the advantages that when the flip is closed, namely the printer works normally, the ribbon driving gear and the ribbon driving shaft are driven by the motor together and drive one side of the ribbon to rotate respectively, so that the whole ribbon can synchronously move for printing. When the ribbon needs to be replaced, the cover body is only required to be opened, and the cover body following gear and the driven gear synchronously rotate along with the cover opening, so that the connecting rod is driven to swing, the connecting rod drives the switching gear to be separated from the engagement of the first following gear and the ribbon driving gear, the ribbon on the side is not driven by the motor, the ribbon on the side can freely rotate, the corresponding ribbon is not stretched, the ribbon is not influenced by static torque of the motor, and the used ribbon is convenient to take off or the new ribbon is convenient to replace. Meanwhile, as one end of the ribbon can automatically rotate, the ribbon can not be broken due to over tightening even if the printing head continuously applies pressure to the ribbon in the process of covering the flip cover. Can reduce the typewriter ribbon probability of damage and improve typewriter ribbon installation convenience through this application.

Drawings

The invention is further described below with reference to the drawings and examples;

FIG. 1 is a schematic view of the whole structure of a ribbon drive switching structure of a printer according to an embodiment of the present invention in a state where a flip cover is fully opened;

FIG. 2 is a schematic diagram showing the whole structure of a ribbon drive switching structure of a printer according to an embodiment of the present invention in a state where a cavity portion is exposed;

FIG. 3 is a schematic diagram showing the whole structure of a ribbon drive switching structure of a printer according to an embodiment of the present invention in a state where a flip cover is completely closed; .

Detailed Description

Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present invention, but not to limit the scope of the present invention.

In the description of the present invention, it should be understood that several means one or more, and that plural means two or more, greater than, less than, exceeding, etc. are understood to not include the present number, and that above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

According to an embodiment of the present invention, a ribbon drive switching structure of a printer, as shown in fig. 1-3, at least includes: a housing 100 including a cavity 110 for mounting a ribbon; the flip cover 200 includes a print head 210 and a cover 220 for covering the cavity 110, the cover 220 is rotatably connected to one side of the housing 100 through a pivot member 230, the print head 210 is convexly arranged at the lower side of the cover 220, and the print head 210 extends into the cavity 110 in the covering state of the cover 220; the ribbon drive mechanism comprises a motor 310, a first follower gear 320, a switching gear 330, a ribbon drive gear 340 and a ribbon drive shaft 350, wherein the first follower gear 320 is driven by the motor 310, the first follower gear 320, the switching gear 330 and the ribbon drive gear 340 can be sequentially meshed, the ribbon drive shaft 350 is driven by the motor 310 to rotate, and the ribbon drive gear 340 and the ribbon drive shaft 350 are respectively arranged at two sides of the cavity 110 and are commonly used for installing a ribbon; the ribbon switching mechanism comprises a cover body following gear 410, a driven gear 420 and a connecting rod, wherein the cover body following gear 410 comprises a plurality of teeth distributed around the axis of the pivoting piece 230, the driven gear 420 is arranged on the shell 100 and meshed with the cover body following gear 410, one end of the connecting rod is eccentrically connected to the driven gear 420, the other end of the connecting rod is rotatably connected with the switching gear 330, and the connecting rod can drive the switching gear 330 to be separated from the meshing of the first following gear 320 and the ribbon driving gear 340 under the cover body 220 uncovering state.

It should be noted that although fig. 1-3 of the present specification show the folder 200 at the upper side of the housing 100, embodiments of the present application are not limited thereto, and in fact, the folder 200 may be disposed at any side of the lower side or the periphery of the housing 100, and the description of the present application is understood to be a positional relationship of the respective members when the folder 200 is directed upward. In addition, the link rod drives the switching gear 330 to disengage from the first follower gear 320 and the ribbon drive gear 340 in fig. 1-3 of the present disclosure is a way of driving the switching gear 330 to ascend, but in practice, a way of driving the switching gear 330 to move downwards or to left and right sides may also be a way of disengaging, which is related to the movement track of the connecting position of the link rod on the driven gear 420, and meanwhile, is related to the arrangement of the positions of the switching gear 330, the first follower gear 320 and the ribbon drive gear 340, for example, the flip 200 is disposed on the left side, the pivoted position is disposed on the lower portion of the left side, and the other side of the flip 200 that is not pivoted is flipped downwards to open the flip 200, at this time, the first follower gear 320 and the ribbon drive gear 340 are disposed on the right side and the upper side of the switching gear 330 respectively, and the switching gear 330 moves to the left side to disengage as the flip 200 is opened. The constructor can select the orientation of each part to finish assembly according to the requirement.

Taking the direction and assembly relation of each component as an example, the ribbon transmission switching structure of the application works as follows: when the folder 200 is closed, that is, the printer is operating normally, the ribbon drive gear 340 and the ribbon drive shaft 350 are driven by the motor 310 together and each drive one side of the ribbon to rotate, so that the ribbon as a whole can move synchronously for printing. When the ribbon needs to be replaced, only the cover 220 needs to be opened upwards, and the cover follower gear 410 and the driven gear 420 synchronously rotate along with the cover opening, so that the connecting rod is driven to swing upwards, the connecting rod drives the switching gear 330 to move upwards, and the switching gear 330 is separated from the engagement with the first follower gear 320 and the ribbon driving gear 340, at the moment, the ribbon driving gear 340 at the side is not driven by the motor 310, so that the left ribbon can rotate freely, and the whole corresponding ribbon is not stretched at the moment and is not influenced by the static moment of the motor 310, so that the used ribbon can be conveniently removed or a new ribbon can be conveniently replaced. Meanwhile, since the left end of the ribbon can rotate freely, even if the printhead 210 continuously applies downward pressure to the ribbon during the process of covering the flip cover 200, since the left ribbon can rotate freely, more ribbon can be released by the rotation of the left ribbon, and more ribbon margin is provided between the two sides, so that the ribbon cannot be broken due to over tightening. Can reduce the typewriter ribbon probability of damage and improve typewriter ribbon installation convenience through this application.

In some embodiments of the present invention, as shown in fig. 1-3, in order to make the switching gear 330 separate from the engaged state and return to the engaged state not too fast, a long hole 431 is further provided on the connecting rod, a limit cylinder 421 is provided on the driven gear 420, and the limit cylinder 421 is slidably connected in the long hole 431, so that a period of time for buffering the switching gear 330 is increased, especially when returning to the engaged state, due to the arrangement of the long hole 431, before the limit cylinder 421 returns to the closed state of the cover 220, the gravity of the switching gear 330 can be utilized to make the switching gear 330 naturally sink, so that the too fast engagement when the switching gear 330 is pressed down can be effectively prevented, and the problem of breakage caused by abrupt tightening of the color ribbon from the loose state is avoided.

On the basis of the previous embodiment, as shown in fig. 1-3, the connecting rod is provided and comprises a first rod body 432 and a second rod body 433 which are hinged with each other, the first rod body 432 is eccentrically connected to the driven gear 420, the switching gear 330 is rotatably connected to the second rod body 433, and as the two parts of the connecting rod are connected through the hinge, and the second rod body 433 and the switching gear 330 have certain gravity, compared with the situation that the first rod body 432 is directly driven by the limiting cylinder 421, the second rod body 433 drives the movement amplitude of the switching gear 330 to be smoother than that of the first rod body 432.

On the basis of the above embodiment, the casing 100 is provided with the guide holes (not shown) which are linearly distributed, and the second rod 433 extends into the guide holes and can slide relative to the guide holes, so that the movement direction of the switching gear 330 can be maintained to a greater extent to be vertically upward or downward, the phenomenon of tooth collision and tooth damage during disengagement is avoided, the connecting rod drives the switching gear 330 to vertically descend when the cover 220 is covered, the meshing relationship of the driving gear of the first motor 310, the switching gear 330 and the ribbon driving gear 340 is conveniently recovered, the possibility of tooth collision and tooth damage phenomenon in the meshing process is reduced, the structure is simple, the printer is prevented from being damaged, and meanwhile, the printer is also conveniently and stably recovered to the working state.

In some embodiments of the present invention, the ribbon drive mechanism further includes an intermediate drive gear 360, and the switching gear 330, the intermediate drive gear 360 and the ribbon drive gear 340 are sequentially meshed, which is suitable for the case that the driving distance between the ribbon installation position and the switching gear 330 is long or the rotational speed of the ribbon needs to be adjusted.

In some embodiments of the present invention, the housing 100 is provided with a avoiding hole (not shown) for accommodating the intermediate transmission gear 360, and the ribbon drive gear 340 is disposed in the cavity 110, so that the switching gear 330 and the intermediate transmission gear 360 are disposed outside the housing 100, thereby optimizing the structure and avoiding the occurrence of motion interference due to too concentrated multi-stage gear transmission distribution.

On the basis of the previous embodiment, the ribbon drive mechanism further includes a cap (not shown) that is mounted on the avoidance hole and detachably connected to the housing 100, and a pin shaft for rotatably connecting with the intermediate drive gear 360 is provided on the cap, and a fixed pin shaft is provided to the intermediate drive gear 360 through the cap. Of course, the constructor can also set a rotating shaft passing through the housing 100, and then fixedly connect the two gears respectively at two times when the rotating shaft is inside and outside the housing 100, so as to realize the space distribution requirement in the embodiment of the upper section.

In some embodiments of the present invention, the ribbon drive mechanism further includes a ribbon drive gear 380 and a second follower gear 390, and the ribbon drive shaft 350 is coaxially provided with the ribbon drive gear 380, and the ribbon drive gear 380 and the second follower gear 390 are driven by a ribbon, that is, the ribbon on the right side in fig. 2-3 may be driven by a ribbon drive. Of course, those skilled in the art may also implement the connection between the motor 310 and the ribbon drive shaft 350 by means of a gear drive or a sprocket drive, or may also implement the connection between the second follower gear 390 and the ribbon drive gear 380 by means of a belt, as shown in fig. 1, and the ribbon drive gear 380 engages with teeth on the ribbon drive shaft 350.

In some embodiments of the invention, the first follower gear 320 is driven with the motor 310 by a belt, wherein the drive is preferably again achieved by a synchronous belt.

In some embodiments of the present invention, the cover 220 is provided with a hook 240 at a side opposite to the connection pivot 230, and the hook 240 is used to engage with the housing 100 when the cover 220 is completely closed, so as to stabilize the closing of the cover 220.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.

Claims

1. A ribbon drive switching structure of a printer, comprising:

a housing including a cavity for mounting a ribbon;

the turnover cover comprises a printing head and a cover body for covering the cavity, the cover body is rotatably connected to one side of the shell through a pivot piece, the printing head is convexly arranged on the lower side of the cover body, and the printing head stretches into the cavity in the cover body covering state;

the ribbon transmission mechanism comprises a motor, a first follow-up gear, a switching gear, a ribbon driving gear and a ribbon driving shaft, wherein the first follow-up gear is driven by the motor, the first follow-up gear, the switching gear and the ribbon driving gear can be meshed in sequence, the ribbon driving shaft responds to the driving of the motor to rotate, and the ribbon driving gear and the ribbon driving shaft are respectively arranged at two sides of the cavity and are commonly used for installing a ribbon;

the ribbon switching mechanism comprises a cover body follow-up gear, a driven gear and a connecting rod, wherein the cover body follow-up gear comprises a plurality of teeth which encircle the axis of the pivoting piece and are distributed, the driven gear is arranged on the shell and meshed with the cover body follow-up gear, one end of the connecting rod is eccentrically connected with the driven gear, the other end of the connecting rod is rotatably connected with the switching gear, and the connecting rod can drive the switching gear to be separated from the meshing of the first follow-up gear and the ribbon driving gear in a cover body cover opening state.

2. The ribbon drive switching structure of a printer according to claim 1, wherein: the connecting rod is provided with rectangular hole, be provided with spacing cylinder on the driven gear, spacing cylinder sliding connection is in the rectangular hole.

3. The ribbon drive switching structure of a printer according to claim 1, wherein: the connecting rod comprises a first rod body and a second rod body which are hinged with each other, the first rod body is eccentrically connected to the driven gear, and the switching gear is rotatably connected to the second rod body.

4. A ribbon drive switching structure for a printer according to claim 3, wherein: the shell is provided with guide holes which are distributed in a straight line, and the second rod body stretches into the guide holes and can slide relative to the guide holes.

5. The ribbon drive switching structure of a printer according to claim 1, wherein: the ribbon drive mechanism further comprises an intermediate drive gear, and the switching gear, the intermediate drive gear and the ribbon drive gear are sequentially meshed.

6. The ribbon drive switching structure of a printer according to claim 5, wherein: the shell is provided with an avoidance hole for accommodating the penetration of the intermediate transmission gear, and the ribbon drive gear is arranged in the cavity.

7. The ribbon drive switching structure of a printer according to claim 6, wherein: the ribbon transmission mechanism further comprises a cover cap, the cover cap is erected on the avoidance hole and detachably connected with the shell, and a pin shaft which is used for being rotatably connected with the intermediate transmission gear is arranged on the cover cap.

8. The ribbon drive switching structure of a printer according to claim 1, wherein: the ribbon drive mechanism further comprises a ribbon drive gear and a second follow-up gear, the ribbon drive shaft is coaxially provided with the ribbon drive gear, and the ribbon drive gear and the second follow-up gear are driven by a belt.

9. The ribbon drive switching structure of a printer according to claim 1, wherein: the first follow-up gear and the motor are driven by a belt.

10. The ribbon drive switching structure of a printer according to claim 1, wherein: the cover body is provided with a hook body at one side opposite to the connecting pivot piece, and the hook body is used for being clamped with the shell when the cover body is covered.