CN111452522A

CN111452522A - Typewriter ribbon transmission switching structure of printer

Info

Publication number: CN111452522A
Application number: CN202010279803.0A
Authority: CN
Inventors: 黄沛强; 陈国昌
Original assignee: JIANGMEN DASCOM COMPUTER PERIPHERAL CO Ltd
Current assignee: Printers Jiangmen Co ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2020-07-28
Anticipated expiration: 2040-04-10
Also published as: CN111452522B

Abstract

The invention discloses a ribbon transmission switching structure of a printer, which comprises: a housing comprising a cavity; a flip cover including a print head and a cover body; the ribbon drive mechanism comprises a motor, a first follow-up gear, a switching gear, a ribbon drive gear and a ribbon drive shaft, wherein the first follow-up gear is driven by the motor, the first follow-up gear, the switching gear and the ribbon drive gear can be meshed in sequence, and the ribbon drive shaft rotates in response to the driving of the motor; 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, 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 disengaged from the first follow-up gear and the ribbon driving gear in the cover body uncovering state. The invention aims to provide a color tape transmission switching structure of a printer, which can reduce the damage probability of the color tape and conveniently install the color tape.

Description

Typewriter 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, various printers on the market need to open the flip cover firstly when the ink ribbon consumables are installed, and then close the flip cover after the ink ribbon is tightened. The printing head is arranged in the flip cover, the flip cover is closed at the moment, and the color ribbon is tightened and difficult to move under the influence of the static moment of the motor because the color ribbon is connected with the motor. At the moment, the turnover cover is closed, the color ribbon is easily damaged or even broken, higher operation requirements are improved when the printer in the prior art is applied to constructors, the constructors are required to maintain the color ribbon consumables to continue using the printer, and therefore the printer has the problems that the color ribbon is easily damaged and the installation difficulty of the color ribbon is high.

Disclosure of Invention

The invention aims to at least solve one of the technical problems in the prior art, and provides a color tape transmission switching structure of a printer, which can reduce the damage probability of the color tape and is convenient to install the color tape.

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 includes at least: the shell comprises a cavity for installing the ribbon; the flip cover comprises a printing head and a cover body used for covering the cavity, the cover body is rotatably connected to one side of the shell through a pivoting piece, the printing head is arranged on the lower side of the cover body in a protruding mode, and the printing head extends into the cavity in the covering state of the cover body; the ribbon driving 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 motor to drive and rotate, and the ribbon driving gear and the ribbon driving shaft are respectively arranged on two sides of the cavity and are used for mounting a ribbon; ribbon switching mechanism, including lid follower gear, driven gear and connecting rod, lid follower gear includes a plurality of encircles the tooth that the pivot subassembly axis distributes, driven gear installs on the casing and with lid follower gear meshing, the one end eccentric of connecting rod is connected on the driven gear, the other end of connecting rod with switching gear swivelling joint, just the connecting rod can drive under the lid state of uncapping switching gear break away from with first follower gear with ribbon drive gear's meshing.

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

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

According to some embodiments of the present invention, the housing is provided with guide holes linearly distributed, and the second rod 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 switching gear, the intermediate drive gear and the ribbon drive gear being sequentially meshed.

According to some embodiments of the invention, the housing defines an avoidance aperture for receiving the intermediate drive gear therethrough, and the ribbon drive gear is disposed within the cavity.

According to some embodiments of the invention, the ribbon drive mechanism further comprises a cap, the cap is erected on the avoiding hole and detachably connected to the housing, and a pin shaft for rotatably connecting to the intermediate transmission gear is provided 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 belt-driven.

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 engaging with the housing when the cover is closed.

According to the embodiment of the ribbon transmission switching structure of the printer, the ribbon transmission switching structure at least has the following beneficial effects: the printer with the ribbon transmission switching structure has the advantages that when the flip cover 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, and therefore the ribbon can be printed in a synchronous motion mode. When the typewriter ribbon is changed to needs, only need open the lid, along with going on that uncaps, lid follower gear and driven gear take place the rotation in step to drive the connecting rod swing, the connecting rod drive switch gear break away from with first follower gear with typewriter ribbon drive gear's meshing, the typewriter ribbon of this side is not driven by the motor, thereby this side typewriter ribbon can free rotation, corresponding typewriter ribbon is not tightened yet and is not influenced by motor static moment, is convenient for take off used typewriter ribbon or change new typewriter ribbon. Meanwhile, one end of the color ribbon can automatically rotate, so that the color ribbon cannot be broken due to too tight tension even if the printing head continuously applies pressure to the color ribbon in the process of covering the turnover cover. Can reduce typewriter ribbon damage probability and improve the convenient degree of typewriter ribbon installation through this application.

Drawings

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

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

FIG. 2 is a schematic view of an overall structure of an embodiment of a ribbon drive switching structure of a printer according to the present invention in a state where a cavity is partially exposed;

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

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it is to be understood that several means are one or more, two or more means are provided, more than, less than, more than, etc. are understood as excluding the present numbers, and more than, less than, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood 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 to 3, includes at least: a housing 100 including a cavity 110 for mounting a ribbon; the flip cover 200 comprises 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 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 when the cover 220 is in a covering state; a ribbon drive mechanism including 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 rotates in response to the driving of the motor 310, and the ribbon drive gear 340 and the ribbon drive shaft 350 are separately arranged at two sides of the cavity 110 and are used for mounting a ribbon together; the ribbon switching mechanism includes a cover follower gear 410, a driven gear 420 and a connecting rod, the cover follower gear 410 includes a plurality of teeth distributed around the axis of the pivot member 230, the driven gear 420 is installed on the casing 100 and engaged with the cover follower 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 disengage from the engagement with the first follower gear 320 and the ribbon drive gear 340 in the state that the cover 220 is opened.

It should be noted that, although fig. 1-3 of the specification of the present application show the flip cover 200 located at the upper side of the housing 100, the embodiment of the present application is not limited thereto, and in fact, the flip cover 200 may be located at the lower side or any side of the periphery of the housing 100, and the description of the present application may be understood as the positional relationship of the components when the flip cover 200 is facing upwards. In addition, the link shown in fig. 1-3 of the specification drives the switching gear 330 to disengage from the first follower gear 320 and the ribbon drive gear 340 by lifting the switching gear 330, but in practice, the switching gear 330 may be moved downward or to the left or right, and the specific disengagement manner is related to the movement trace of the connecting rod at the connecting position of the driven gear 420, also in relation to the positional arrangement of the switching gear 330, the first follower gear 320 and the ribbon drive gear 340, for example, the flip cover 200 is disposed at the left side, and the pivoted position is at the lower part of the left side, and the other side of the flip cover 200, which is not pivoted, is turned downward to open the flip cover 200, and at this time, the first follower gear 320 and the ribbon drive gear 340 are disposed at the right side and the upper side of the switching gear 330, respectively, and the switching gear 330 moves leftward to be disengaged as the flip cover 200 is opened. The constructor can select the orientation of each part to finish the assembly according to the requirement.

Taking the orientation and the assembly relationship of the illustrated components as an example, the color tape drive switching structure of the present application works as follows: when the cover 200 is closed, i.e., 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 be moved synchronously for printing. When the typewriter ribbon needs to be changed, only need upwards open lid 220, go on along with uncapping, lid follow-up gear 410 and driven gear 420 take place the rotation in step, thereby drive the connecting rod luffing motion, the connecting rod drives switching gear 330 upward movement, thereby break away from the meshing with first follow-up gear 320 and typewriter ribbon drive gear 340, the typewriter ribbon drive gear 340 of this side does not receive the drive of motor 310 this moment, thereby left side typewriter ribbon can free rotation, corresponding typewriter ribbon is whole not tightened this moment and also not influenced by motor 310 static moment, be convenient for take off used typewriter ribbon or change new typewriter ribbon. Meanwhile, since the left end of the ribbon can rotate freely, even if the printhead 210 continuously applies a downward pressure to the ribbon while the flip 200 is closed, the ribbon on the left side can rotate freely, so that more ribbons can be released through the rotation of the ribbon on the left side, and more ribbon margin between the two sides is provided, thereby preventing the ribbon from being broken due to over-tightening. Can reduce typewriter ribbon damage probability and improve the convenient degree of typewriter ribbon installation through this application.

In some embodiments of the present invention, as shown in fig. 1 to 3, in order to make the switching gear 330 disengage 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 can be 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 position of the closed state of the cover 220, the switching gear 330 can naturally sink by using the gravity of the switching gear 330, so that the switching gear 330 can be effectively prevented from being engaged too fast when being pressed down, and the breaking problem caused by the ink ribbon being suddenly tightened from the loose state can be avoided.

On the basis of the previous embodiment, as shown in fig. 1-3, the connecting rod includes a first rod 432 and a second rod 433 hinged to each other, the first rod 432 is eccentrically connected to the driven gear 420, and the switching gear 330 is rotatably connected to the second rod 433, because the two parts of the connecting rod are connected by hinging, and the second rod 433 and the switching gear 330 have a certain gravity, compared to the case where the first rod 432 is directly driven by the positioning cylinder 421, the movement range of the switching gear 330 driven by the second rod 433 is more stable than that of the first rod 432.

On the basis of the previous embodiment, the casing 100 is provided with the guide holes (not shown) which are linearly distributed, the second rod body 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 be vertical upward or downward to a greater extent, 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 relation among the first motor 310 driving gear, the switching gear 330 and the ribbon driving gear 340 is convenient to recover, the possibility of recovering the phenomenon of tooth collision and tooth damage during meshing is also reduced, the structure is simple, the printer is prevented from being damaged, and meanwhile, the printer is convenient to stably recover to the working state.

In some embodiments of the present invention, the ribbon drive mechanism further includes an intermediate transmission gear 360, and the switching gear 330, the intermediate transmission gear 360 and the ribbon drive gear 340 are engaged in sequence, which is suitable for the case where the transmission distance between the ribbon installation position and the switching gear 330 is long or the ribbon rotation speed needs to be adjusted.

In some embodiments of the present invention, the casing 100 is provided with an avoiding hole (not shown) for receiving the intermediate transmission gear 360 to pass through, and the ribbon driving gear 340 is disposed in the cavity 110, so that the switching gear 330 and the intermediate transmission gear 360 are disposed outside the casing 100, thereby optimizing the structure and avoiding the motion interference caused by too concentrated transmission distribution of the multiple gears.

On the basis of the former embodiment, the ribbon drive mechanism further includes a cap (not shown) that is erected on the avoiding hole and detachably connected to the casing 100, and a pin shaft for rotatably connecting to the intermediate transmission gear 360 is provided on the cap, and the intermediate transmission gear 360 is provided with a fixed pin shaft through the cap. Of course, the constructor may also set a rotating shaft passing through the casing 100, and then fixedly connect two gears twice inside and outside the casing 100 to achieve the spatial distribution requirement in the above embodiment.

In some embodiments of the present invention, the ribbon drive mechanism further includes a ribbon drive gear 380 and a second follower gear 390, the ribbon drive gear 380 is coaxially disposed on the ribbon drive shaft 350, and the ribbon drive gear 380 and the second follower gear 390 are belt-driven, i.e., the ribbon on the right side of fig. 2-3 can also be belt-driven. Of course, the connection between the motor 310 and the ribbon drive shaft 350 may be achieved by a gear drive or a sprocket drive, etc., or, as shown in fig. 1, the second follower gear 390 may rotate synchronously with the ribbon drive gear 380 via a belt, and the ribbon drive gear 380 may mesh with the teeth on the ribbon drive shaft 350.

In some embodiments of the present invention, the first follower gear 320 and the motor 310 are driven by a belt, wherein the driving is preferably realized 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 for being engaged with the housing 100 when the cover 220 is closed, so as to stabilize 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 those skilled in the art without departing from the gist of the present invention.

Claims

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

the shell comprises a cavity for installing the ribbon;

the flip cover comprises a printing head and a cover body used for covering the cavity, the cover body is rotatably connected to one side of the shell through a pivoting piece, the printing head is arranged on the lower side of the cover body in a protruding mode, and the printing head extends into the cavity in the covering state of the cover body;

the ribbon driving 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 motor to drive and rotate, and the ribbon driving gear and the ribbon driving shaft are respectively arranged on two sides of the cavity and are used for mounting a ribbon;

ribbon switching mechanism, including lid follower gear, driven gear and connecting rod, lid follower gear includes a plurality of encircles the tooth that the pivot subassembly axis distributes, driven gear installs on the casing and with lid follower gear meshing, the one end eccentric of connecting rod is connected on the driven gear, the other end of connecting rod with switching gear swivelling joint, just the connecting rod can drive under the lid state of uncapping switching gear break away from with first follower gear with ribbon drive gear's meshing.

2. An ink 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, but spacing cylinder sliding connection be in rectangular downthehole.

3. An ink 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 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.

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

5. An ink 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 meshed in sequence.

6. An ink ribbon drive switching structure of a printer according to claim 5, wherein: the casing is provided with an avoiding hole for accommodating the middle transmission gear to penetrate through, and the ribbon driving gear is arranged in the cavity.

7. An ink ribbon drive switching structure of a printer according to claim 6, wherein: the ribbon transmission mechanism further comprises a cap, the cap is erected on the avoiding hole and detachably connected with the shell, and a pin shaft which is rotatably connected with the middle transmission gear is arranged on the cap.

8. An ink 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 through a belt.

9. An ink ribbon drive switching structure of a printer according to claim 1, wherein: the first follow-up gear and the motor are in belt transmission.

10. An ink ribbon drive switching structure of a printer according to claim 1, wherein: the cover body is provided with a hook body on one side opposite to the connecting pivoting piece, and the hook body is used for being clamped with the shell when the cover body is closed.