CN210617614U

CN210617614U - Printer and printing method

Info

Publication number: CN210617614U
Application number: CN201920620841.0U
Authority: CN
Inventors: 不公告发明人
Original assignee: Xiamen Hanyin Electronic Technology Co Ltd
Current assignee: Xiamen Hanyin Co ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-05-26
Anticipated expiration: 2029-04-30

Abstract

The utility model provides a printer, which comprises a printing mechanism with a thermal head and a printing roller, a conveying piece driving the printing sheet to move, a bracket supporting the printing roller or the thermal head, and a first driving device; the first driving device comprises a first motor and a transmission mechanism for swinging, the transmission mechanism for swinging comprises a bracket driving part, and when the bracket driving part moves along a preset direction or in the direction opposite to the preset direction, the bracket driving part correspondingly drives the bracket to swing so as to enable the printing roller and the thermal head to be close to or far away from each other; the swing mechanism is characterized in that the swing mechanism also comprises an eccentric part, the bracket driving part is provided with a first wall part which is pushed by the eccentric part to move along a preset direction, and a second wall part which is pushed by the eccentric part to move along the direction opposite to the preset direction, and the eccentric part switches between the states of pushing the first wall part and pushing the second wall part when rotating. Compare in prior art need switch the turning to of motor and adjust support swing position, the mode of the motor adjustment support swing of this application is comparatively simple.

Description

Printer and printing method

Technical Field

The utility model relates to a printer technique specifically relates to a printer.

Background

A conventional printer that operates with a thermal head that generates heat in cooperation with a print roller includes: thermal printers and sublimation printers. Sublimation printers are used in conjunction with ribbon cartridges, typically to print photographic paper. Thermal printers are commonly used to print small sheets of paper. A dye sublimation printer generally includes: the printer comprises a printing mechanism with a thermal head and a printing roller, a bracket which supports the thermal head or the printing roller and can swing within a preset amplitude range, and a driving mechanism which drives the bracket to swing. Patent application CN109249710A is an above-mentioned thermal sublimation printer, which controls the swing of the support by the rack-type engaging portion cooperating with the forward rotation and the reverse rotation of the gear, and in order to cooperate with the forward rotation and the reverse rotation of the gear, the motor for controlling the rotation of the gear also needs to correspond to the forward rotation and the reverse rotation. The present application is proposed in view of the structural characteristics of the existing paper feeding roller and the problems of the application to the specific type of printer.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a printer needs corotation and reversal to correspond control support wobbling problem in order to solve current printer control support wobbling motor is provided.

In order to solve the above technical problem, the present application provides a printer, which includes a printing mechanism having a thermal head and a printing roller, a conveying member for driving a printing sheet to move, a holder for supporting the printing roller or the thermal head, and a first driving device; the first driving device comprises a first motor and a transmission mechanism for swinging, the transmission mechanism for swinging comprises a bracket driving part, and when the bracket driving part moves along a preset direction or in the direction opposite to the preset direction, the bracket driving part correspondingly drives the bracket to swing so as to enable the printing roller and the thermal head to be close to or far away from each other; the swing driving mechanism is characterized by further comprising an eccentric part, the bracket driving part is provided with a first wall part which is pushed by the eccentric part to move along a preset direction, and a second wall part which is pushed by the eccentric part to move along the direction opposite to the preset direction, and the eccentric part is switched between the states of pushing the first wall part and pushing the second wall part when rotating.

Preferably, the first driving device comprises a switching mechanism in transmission connection with the first motor and a transmission mechanism for conveying which drives the conveying member to rotate; the first motor correspondingly switches the transmission connection relationship between the switching mechanism and the transmission mechanism for conveying and the transmission mechanism for swinging by switching the rotation direction of the first motor.

Preferably, the outer circumferential surface of the conveying member about its rotation axis includes: the printing device comprises a contact surface which has a first extension radian and is contacted with a printing sheet to drive the printing sheet to move, and a non-contact surface which has a second extension radian and cannot be contacted with the printing sheet; the contact surface and the non-contact surface alternately face the printing sheet when the conveying member rotates so as to intermittently drive the printing sheet to move.

Preferably, the carriage has a first swing state in which the print roller and the thermal head are in a first close state, and a second swing state in which the print roller and the thermal head are in a second close state; the first close state is a state that the printing sheet and the ribbon are separated and can move independently respectively between the printing roller and the thermal head, and the second close state is a state that the printing sheet and the ribbon are in contact and can only move synchronously between the printing roller and the thermal head.

Preferably, the printer comprises: the buffer piece is provided with an elastic part which can elastically deform when pushed by the pushing piece; one of the pusher and the buffer is configured to rotate with the transport member, and the other is configured to be non-rotatable with the transport member.

By adopting the technical scheme, the utility model discloses can gain following technological effect:

1. according to the printer, the swinging transmission mechanism controls the movement of the support driving part through the rotation of the eccentric part, and the state of pushing the support driving part can be switched when the eccentric part rotates to different positions, so that the requirement for adjusting the swinging position of the support can be met only by rotating the corresponding first motor in one direction, and compared with the prior art that the swinging position of the support is adjusted by switching the steering direction of the motor, the swinging mode of the support is adjusted by the motor is simpler; 2. The utility model provides a first drive arrangement includes switching mechanism and carries under with drive mechanism's the condition, first motor is when different rotation direction switch, can correspond the rotation of drive eccentric part or drive transport piece and rotate, first motor has two kinds of drive function concurrently, compare in setting up the motor in addition and drive alone and carry a rotation, this scheme makes the performance of the first motor of printer can obtain maximum use, and because the motor is the higher part of price, first motor has two convenient effects concurrently, also help saving cost.

3. When the printer is provided with the pushing piece and the buffer piece, the pushing piece pushes the elastic part to deform so that the conveying piece can normally rotate when the printer normally works; when the transport member needs to be stopped urgently, the transport member helps the transport member to be stopped in time so that it is in a state where the non-contact surface faces the print sheet.

Drawings

Fig. 1 illustrates a structure of a conveying member for printing sheets according to an embodiment of the present application;

fig. 2 illustrates a structure of a conveying member for printing sheets according to another embodiment of the present application;

fig. 3 illustrates a structure of a conveying member for printing sheets according to still another embodiment of the present application;

FIGS. 4 and 5 are schematic diagrams of a printer according to an embodiment of the present disclosure from different perspectives, respectively;

FIG. 6 depicts a schematic view of a printer according to another embodiment of the present application;

FIG. 7 is a schematic diagram of a printer according to another embodiment of the present application;

FIG. 8 is a schematic diagram of the printer of FIG. 7 of the present application in a first exploded state;

FIGS. 9 and 10 are schematic diagrams respectively illustrating the printer of FIG. 7 of the present application in a second disassembled state from different perspectives;

FIG. 11 is a schematic view of a first drive and transport portion of the printer of FIG. 7 of the present application;

FIG. 12 depicts an exploded view corresponding to FIG. 11;

FIG. 13 is a diagram showing a state of change in the swing of the print roller holder by the first driving means;

fig. 14 shows a state in which the ribbon cassette is mounted to the printer of fig. 7.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

With reference to fig. 1, in an embodiment, a conveying member 1 for printing sheets of the present application includes: a fulcrum 1C, a main body portion that drives the movement of the printing sheet, the main body portion having a fan-shaped section along the rotation axis L of the transport member 1. The outer peripheral surface of the main body portion about the rotation axis L includes: a contact surface 1A having a first arc of extension and a non-contact surface 1B having a second arc of extension. In this way, the contact surface 1A and the non-contact surface 1B alternately face the print sheet when the transport member 1 rotates, to intermittently drive the print sheet to move, while the contact surface 1A contacts and drives the print sheet to move, and accordingly, the non-contact surface 1B cannot contact the print sheet. The first arc of extension may be approximately 30 to 120 degrees, such as 110 degrees, and the second arc of extension may be approximately 240 to 330 degrees, such as 250 degrees. The support shaft 1C is provided with a trigger 6 and a pusher 7, which rotate synchronously with the conveyor 1, the function of which will be described in more detail below.

The present application is not limited to the embodiment of fig. 1, and in the embodiment of fig. 2, the main body portion may include separate portions with coincident rotation axes, and the two portions may be detachably mounted for adjustment according to different sizes of printing sheets. In the embodiment of fig. 3, the contact surface 1A and the non-contact surface 1B may be separated portions, and the first extending curvature and the second extending curvature respectively correspond to the separated portions. It is easily understood that on the basis of the variant designs of fig. 2 and 3, a person skilled in the art can also easily devise other variants, which shall be understood to belong to the equivalent designs of the present application.

With reference to fig. 4 and 5, a printer according to an embodiment of the present application includes: a conveying member 1, a printing mechanism 2, a driving roller mechanism 3, a first detection mechanism 4, a second detection mechanism 5, a trigger member 6, a pushing member 7, a buffer member 8 and a sheet accommodating member 9. Fig. 4 and 5 do not show the frame, the first driving device capable of driving the conveying element 1 to rotate, and the control mechanism for controlling the operating state of the driving mechanism, wherein the first driving device may be a driving mechanism formed by a common motor and a gear assembly, and the control mechanism is a control mechanism with a circuit board and an operation interface.

The transport member 1 of the embodiment shown in fig. 4 and 5 is the transport member shown in fig. 1, which drives the printing sheet P to the printing mechanism 2, but the transport member 1 may be adjusted to be the transport roller shown in fig. 2 or fig. 3. The printing mechanism 2 has a thermal head 2A and a printing roller 2B between which a printing sheet P is sandwiched, and one of the thermal head 2A and the printing roller 2B is disposed to be movable closer to and farther from the other. Examples of the printing sheet P are photographic printing paper, common receipt printing paper, label printing paper with a removable label, ink paper which can develop colors by the heat of a thermal head, or photographic printing paper which can be used in conjunction with a ribbon cartridge. The driving roller mechanism 3 includes an upper driving roller 3A and a lower driving roller 3B, and is located downstream of the printing mechanism 2 along the printing path, between which the printing sheet P is sandwiched. When the printing sheet P moves to a printing position where the printing sheet P can be printed by the printing mechanism 2 (the printing position in this embodiment is a position where the printing sheet P moves to be clamped and moved by the driving roller mechanism 3), the control mechanism controls the driving roller mechanism 3 according to a first electric signal to pull out the printing sheet P from the sheet accommodating part 9 completely and then reversely drive the printing sheet P to retreat to the printing position), and the first detection mechanism 4 can be triggered by the printing sheet P to generate a first electric signal to the control mechanism, the first detection mechanism 4 in this embodiment is a reflective photoelectric switch, and the emergent light of the first detection mechanism is reflected by the printing sheet P and then returns, and receives the reflective electric signal and generates the first electric signal to the control mechanism, and the first detection mechanism 4 can select other common detection mechanisms. It should be noted that the triggering of the first detection mechanism 4 described herein means that the first detection mechanism can be directly or indirectly triggered by the activity of the printing sheet P, specifically, unlike the present embodiment that the activity of the printing sheet P is directly triggered, in another embodiment, a triggering mechanism that can be synchronously triggered with the printing sheet P may be additionally provided, and the triggering mechanism driven by the triggering mechanism triggers the first detection mechanism 4 to generate an electrical signal. The second detecting mechanism 5 generates a second electrical signal to the control mechanism when triggered, the triggering member 6 rotates synchronously with the conveying member 1 and triggers the second detecting mechanism 5 when the non-contact surface 1B of the conveying member 1 faces the printing sheet P, the triggering member 6 of the opposed-type photoelectric switch of the second detecting mechanism 5 of this embodiment causes the second detecting mechanism 5 to generate the second electrical signal by obstructing the optical path. It should be noted that the second detecting mechanism 5 can be adjusted to other common displacement detecting mechanisms, such as a hall sensor, and the triggering member 6 can be adjusted accordingly. The buffer 8 has an elastic portion 8A that is elastically deformable when pushed by the pusher 7, the pusher 7 is disposed so as to rotate with the conveyor 1, and the buffer 8 is disposed so as not to rotate with the conveyor 1. The conveying member 1 is configured to push the pushing member 7 to the elastic portion 8A when the triggering member 6 triggers the second detecting mechanism 5. In another embodiment, the buffer 8 may be configured to rotate with the transport element 1, and the pusher element 7 may be configured to be non-rotatable with the transport element 1. The sheet container 9 is stacked with the print sheets P.

The printer of the embodiment of fig. 4 and 5 operates as follows: firstly, the conveying piece 1 is driven to drive the trigger piece 6 and the pushing piece 7 to rotate along with the trigger piece and the pushing piece, the contact surface 1A and the non-contact surface 1B of the conveying piece 1 alternately face the printing sheet P, the printing sheet P closest to the conveying piece 1 is further driven to move gradually in an intermittent mode, and meanwhile the pushing piece 7 drives the elastic portion 8A to reciprocate to deform elastically. Further, when the printing sheet P moves to the printing mechanism 2 and the front end is clamped by the driving roller mechanism 3, the first detecting mechanism 4 is triggered to generate a first signal, and at this time, the control mechanism controls the driving roller mechanism 3 to continue rotating according to the first signal so as to completely pull the printing sheet P out of the sheet accommodating part 9, and then the driving roller mechanism 3 reverses to retreat the printing sheet P to a printing position where printing can be performed. Further, when the second detection mechanism 5 is triggered to generate the second electric signal, the control mechanism controls the first driving device to stop driving the conveying member. When the first driving device stops driving the conveying member 1 to rotate, the elastic part 8A plays a role of buffering the rotation of the conveying member 1 by matching with the pushing piece 7.

It is easy to understand that, unlike the embodiment shown in fig. 4 and 5, in other embodiments, the first detection mechanism 4 may not be provided, and the control mechanism controls the first driving device to stop driving the conveying member 1 to rotate only by the second electric signal generated by the second detection mechanism 5. Specifically, the size of the printing sheet P that can be printed by the printer can be preset, the distance that the conveying member 1 can drive the printing sheet P to travel when rotating for one cycle can be preset, and the control mechanism can control the first driving device 16 to stop driving the conveying member 1 to rotate according to one or more second electric signals when the conveying member rotates for one cycle or a plurality of cycles, and at the moment, the printing sheet P correspondingly moves to the position where printing can be performed. For the printing sheet P with a smoother surface, it is preferable that the first detection mechanism 4 and the second detection mechanism 5 cooperate to perform detection, because if the movable position of the printing sheet P is determined only by the second detection mechanism 5, there may be a detection error because the surface of the printing sheet P is too smooth and the conveying member 1 may idle for a part of the time, at which time the control mechanism may misdetermine that the printing sheet P has reached the printing position, and therefore whether to set the two detection mechanisms at the same time can be adjusted according to different types of the printing sheet P. In another embodiment, the buffer and the pusher may not be provided.

Referring to fig. 6, it corresponds to a color printer that can be used in conjunction with a ribbon cassette to form an image on a color-photograph-type printing sheet P. In this embodiment, only the ribbon M of the ribbon cartridge and the take-up spool located at the right side of the ribbon M for rolling up the ribbon M are shown. In this embodiment, the thermal head 2A and the print roller 2B can sandwich the print sheet P and the ink ribbon M therebetween. In addition to the components shown in fig. 4 and 5, the printer further includes a third detecting mechanism 13, the ribbon M is of a conventional structure and has a plurality of identification components, such as stripes or specific shape marks, at specific positions for the third detecting mechanism 13 to detect, and the third detecting mechanism 13 is used for detecting the moving position of the ribbon M so as to transfer the different colors of ink on the ribbon M onto the printing sheet M, and generating a third electrical signal to the control mechanism according to the position change of the ribbon M. The specific steps of the printer of fig. 6 working with an ink ribbon cassette are as follows: t1: the third detection mechanism 13 outputs a third electric signal to the control mechanism when detecting that the take-up reel drives the ribbon M to move to a position where the ribbon M can be matched with the printing sheet P for printing; t2: the printing sheet P is driven by the conveying piece 1 to move to be clamped between the upper transmission roller 3A and the lower transmission roller 3B, the first detection mechanism 4 generates a first electric signal, the second detection mechanism 5 generates a second electric signal, and the conveying piece stops rotating; t3: the thermal head 2A and the printing roller 2B are close to each other, the upper transmission roller 3A and the lower transmission roller 3B drive the printing sheet P to move to the right side in the figure 6, and meanwhile, the take-up reel drives the ribbon M to move normally, namely, the printing sheet P and the ribbon M move synchronously, so that the ink of the first color on the ribbon M is transferred to the printing sheet M; t4, the thermal head 2A and the printing roller 2B are separated from each other, the take-up reel does not drive the ribbon M to move, and the upper transmission roller 3A and the lower transmission roller 3B drive the printing sheet P to move to the left side in the figure 6 to the initial position where printing can be carried out; t5, repeating steps T3 and T4 until the ink of different color on the ribbon M and the protective layer are transferred to the printing sheet P. The third detecting mechanism 13 is selected by matching with the color bar M, such as a correlation type photoelectric switch or a reflection type photoelectric switch, which is a conventional technique and will not be described again. Other characteristics not mentioned in fig. 6 can refer to the foregoing description related to the embodiments of fig. 4 and fig. 5, and are not repeated.

With reference to fig. 7 to 13, a printer according to still another embodiment of the present application is a printer capable of printing a printing sheet of a photo paper type in cooperation with an ink ribbon cassette. Specifically, the printer of the present embodiment includes a frame 11, the conveying member 1, the printing mechanism 2, the driving roller mechanism 3, the first detecting mechanism 4, the second detecting mechanism 5, the trigger member 6, the pushing member 7, and the buffer member 8 of the present embodiment are disposed on the frame 11 in a manner distributed in the embodiment shown in fig. 6, and the frame 11 is provided with a pressing member 10 for pressing the printing sheet. The printing roller 2B is disposed on the printing roller holder 12, the printing roller holder 12 has rotation end portions 12A on both sides, the frame 11 correspondingly has pin member disposition holes 11A on both sides, and the printing roller holder 12 is disposed to be swingable within a predetermined range by passing a pair of pin members through the pair of pin member disposition holes 11A so that the printing roller 2B comes close to or away from the thermal head 2A. Referring to fig. 14, the sheet container 9 may be disposed on the ribbon cassette 22, and the ribbon cassette 22 with the sheet container 9 is conventional technology, which is not essential to the present application and therefore will not be described again.

In this embodiment, the printer includes a first drive device 16, a second drive device 19, a take-up reel drive 15, and a clutch transmission mechanism 14. The first driving device 16 has the function of driving the printing roller support 12 to swing and driving the conveying member 1 to rotate, and the second driving device 19 has the function of driving the lower driving roller 3B to rotate. Referring to fig. 14, the take-up reel driving member 15 is used to drive the take-up reel (not shown) of the ink ribbon cartridge 22 to rotate after the ink ribbon cartridge is mounted on the frame 11. The clutch transmission mechanism 14 is located between the storage reel drive 15 and the lower transmission roller 3B, and can be drivingly connected or disconnected. The specific structure and cooperation of the first drive device 16, the second drive device 19 and the clutch transmission 14 will be described in further detail below.

Referring to fig. 11 and 12, the first driving device 16 includes: a frame body 23, a first motor 17, a switching mechanism 18 in transmission connection with the first motor 17, a transmission mechanism 20 for conveying which drives the conveying member 1 to rotate, and a transmission mechanism 21 for swinging which drives the printing roller bracket 12 to swing. The first motor 17 switches the rotational direction thereof, thereby responding to the transmission connection relationship between the switching mechanism 18, the conveying transmission mechanism 20, and the swinging transmission mechanism 21. The conveying member 1, the second detection mechanism 5 and the buffer member 8 are positioned on the frame body 23.

Among them, switching mechanism 18 includes: an oscillating member 18A, a first switching gear 18B rotatably disposed on the oscillating member 18A, and a first gear set 18C between the oscillating member 18A and the first motor 17, the first gear set 18C being disposed on the frame 23. The conveying transmission mechanism 20 is a gear disposed on the conveying member 1. The swing transmission mechanism 21 includes:

gear members

21A, 21B, 21C, 21D, 21E, an eccentric member 21F, and a carriage driver 21G that pushes the printing roller carriage 12 to oscillate, and a fourth detection mechanism 21H. The eccentric member 21F coincides with the rotational axis of the gear member 21E. When the first motor 17 rotates forward, the first gear set 18C drives the swinging member 18A to swing to make the first switching gear 18B engage with the gear of the transmission mechanism 20 for conveying, and further drives the conveying member 1 to rotate. When the first motor 17 rotates reversely, the first gear set 18C drives the swinging member 18A to swing such that the first switching gear 18B is engaged with the gear member 21A, and the eccentric member 21F rotates. The bracket driver 21G has a slide portion S4 slidably fitted with the frame 11, and by this slide portion S4, the bracket driver 21G is provided so as to be movable only in the X direction and in the X opposite direction. The holder driver 21G has an upper and lower through hole S1 having a substantially elliptical shape, the eccentric member 21F is disposed on the gear member 21E, the peripheral edge of the eccentric member 21F contacts the inner wall of the through hole S1, the portion of the holder driver 21G located on the inner wall of the through hole S1 includes a first wall portion that is moved in the X direction by the eccentric member 21F and a second wall portion that is moved in the direction opposite to the X direction by the eccentric member 21F, and when the eccentric member 21F rotates, the holder driver 21G is switched between the states of moving in the X direction and moving in the direction opposite to the X direction. The bracket driving member 21G has interlocking portions S2 and S3 on both left and right sides thereof, respectively, having engagement surfaces which gradually rise. The print roller holder 12 has a first fitting portion 12C and a second fitting portion 12B. Referring to fig. 13, when the carriage driver 21G is moved in the X direction, the first fitting portion 12C is gradually lifted by being pushed by the interlocking portions S2 and S3, so that the print roller carriage 12 is lifted. Conversely, when the carriage driver 21G is moved in the opposite direction X, the first fitting portion 12C is gradually lowered guided by the interlocking portions S2 and S3, so that the print roller carriage 12 is lowered. As shown in fig. 10, the printer further includes a fourth detecting mechanism 21H for detecting the movable position of the carriage driver 21G in the X direction and the direction opposite to the X direction, the fourth detecting mechanism 21H generates a fourth electrical signal to the control mechanism, and the control mechanism controls whether the first motor 17 stops operating, the fourth detecting mechanism 21H can be configured to directly detect the movable position of the carriage driver 21G or configured to indirectly detect the movable position of the carriage driver 21G by detecting the rotational position of the eccentric member 21F, the fourth detecting mechanism 21H is, for example, a common photoelectric detecting mechanism having a detecting portion, and the carriage driver 21G or the eccentric member 21F can have a scale portion cooperating with the detecting portion. The take-up reel drive 15 includes a gear member 15A. The clutch transmission mechanism 14 includes: a rotating member 14A independently rotatably disposed at one side of the lower driving roller 3B, a rod member 14B connected to the rotating member 14A and located between the first and second

fitting portions

12C and 12B, a gear member 14C rotating with the lower driving roller 3B, and a gear member 14D engaged with the gear member 14C. The rod member 14B is clamped between the first matching part 12C and the second matching part 12B, when the printing roller bracket 12 is lifted, the first matching part 12C pushes the rod member 14B to swing clockwise, and the gear member 14D is meshed with the gear member 15A; when the print roller holder 12 descends, the second engaging portion 12B pushes the lever member 14B to swing counterclockwise, and the gear member 14D and the gear member 15A separate. The second driving device 19 comprises a second motor 19A and a gear assembly between the second motor and the lower driving roller 3B, and in another embodiment, the gear assembly is adjustable to allow the gear assembly to be arranged between the second motor 19A and the upper driving roller 3A. The second motor 19A controls the reciprocating movement of the printing sheet P by forward and reverse rotation to complete the print job in cooperation with the print mechanism and the ribbon. Referring to fig. 13, the engagement surface of the carriage driver 21G has a first section N1, a second section N2, and a third section N3, which are gradually raised in height, and the first engagement portion 12C passes through the first section N1, the second section N2, and the third section N3 in order when the carriage driver 21G moves forward in the X direction, which allows the thermal head 2A and the print roller 2B to have different approach distances. In the second part N2, the print roller holder 12 is in the first half-lifted swing state, and at this time, a gap for moving the ink ribbon and the print sheet is left between the thermal head 2A and the print roller 2B (that is, the thermal head 2A and the print roller 2B are in the first approach state in which the ink ribbon and the print sheet are separated and can move independently therebetween), and at the same time, the rotating member 14A rotates to engage the gear member 14D with the gear member 15A, and at this time, the second motor 19A rotates to drive the storage reel driving member 15 to control the ink ribbon to move to a position where normal printing can be performed. At the third portion N3, the print roller holder 12 is in the second swing state of being fully raised, the thermal head 2A and the print roller 2B are in the second close state of being unable to let the ink ribbon move therebetween, in the second close state, the ink ribbon M and the print sheet are in contact together, under the action of the lower driving roller 3B and the take-up reel driving member 15, the thermal head 2A and the ink ribbon are in sliding frictional contact, the print roller 2B and the print sheet are in rolling contact, and the gear member 14D and the gear member 15A are engaged more tightly.

The specific steps of the printer of fig. 7 to 13 working with the ribbon cassette 24 are as follows: t1: when the third detection mechanism 13 detects that the ribbon moves to a position where the ribbon can be matched with the printing mechanism to print, the control mechanism controls the second motor 19A to stop rotating according to a third electric signal generated by the third detection mechanism 13; t2: the first motor 17 rotates positively to enable the conveying piece 1 to drive the printing sheet P to move to the transmission roller mechanism 3, when the first detection mechanism is triggered to generate a first electric signal, the transmission roller mechanism 3 continues to drive the printing sheet P to move until the printing sheet P is completely separated from the sheet accommodating piece under the action of the positive rotation of the second motor 19A, then the transmission roller mechanism 3 drives the printing sheet P to retreat to a printing position where printing can be carried out under the action of the reverse rotation of the second motor 19A, and the control mechanism controls the first motor to stop working according to the second electric signal so as to avoid the movement of the other printing sheet P; t3: the first motor 17 rotates reversely to make the eccentric part 21F rotate 180 degrees relative to the initial position, the bracket driving part 21G moves a second displacement amount along the X direction relative to the initial position, the printing roller bracket 12 is in a completely lifted state, at this time, the first motor 17 stops rotating, the second motor 19A rotates positively to make the upper transmission roller 3A, the lower transmission roller 3B and the gear part 15A rotate synchronously, and the printing sheet P is driven to further move continuously along the X direction, so that the first layer of ink of the ribbon is thermally transferred to the printing sheet P; t4: the first motor 17 rotates reversely to enable the eccentric part 21F to rotate 360 degrees relative to the initial position, the printing roller bracket 12 is in an un-lifted state, at the moment, the first motor 17 stops rotating, the second motor 19A rotates reversely to enable the lower driving roller 3B to rotate, meanwhile, the upper driving roller 3A rotates in a driven mode, and then the printing sheet P is driven to move to a position where printing can be carried out along the direction opposite to the X direction; t5: repeating the steps T3 and T4 to successively emboss the multilayer ink and the transparent protective layer onto the printing sheet P; t6: after the completion of all the print jobs, the second motor 19A rotates forward to send out the print sheet P on which printing is completed.

In the embodiment of fig. 7 to 13, the approach and the separation of the print roller to and from the thermal head 2A are achieved by the oscillation of the print roller holder 12 within a preset range, but it is easily understood that in another embodiment, the approach and the separation of the thermal head 2A may be achieved by activating the same. Specifically, in another embodiment, the print roller may be made incapable of swinging, and a thermal head holder supporting the thermal head and swinging within a preset range of amplitude may be provided correspondingly to make the thermal head approach or move away from the print roller. Correspondingly, the transmission mechanism for swinging can be correspondingly adjusted to drive the thermal head bracket to swing, and when the thermal head bracket makes the printing roller close to or far away from the thermal head, the clutch transmission mechanism is correspondingly driven to connect or disconnect the receiving scroll driving piece and the lower transmission roller. In another embodiment, the sheet receiving member may not be integrated with the cassette.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A printer, comprising: a printing mechanism (2) with a thermal head (2A) and a printing roller (2B), a conveying member (1) for driving a printing sheet (P) to move, a bracket for supporting the printing roller (2B) or the thermal head (2A), and a first driving device (16); the first driving device (16) comprises a first motor (17) and a transmission mechanism (21) for swinging, the transmission mechanism (21) for swinging comprises a bracket driving part (21G), and when the bracket driving part (21G) moves along a preset direction X or in the direction opposite to the preset direction X, the bracket (12) is correspondingly driven to swing so as to enable the printing roller (2B) and the thermal head (2A) to be close to or far away from each other; the swing transmission mechanism (21) is characterized by further comprising an eccentric part (21F), the bracket driving part (21G) is provided with a first wall part which is pushed by the eccentric part (21F) to move along a preset direction (X), and a second wall part which is pushed by the eccentric part (21F) to move along the direction opposite to the preset direction (X), and the eccentric part (21F) is switched between the states of pushing the first wall part and pushing the second wall part when rotating.

2. The printer according to claim 1, characterized in that said first driving means (16) comprise a switching mechanism (18) in transmission connection with said first motor (17), a transmission mechanism (20) for conveying driving said conveying member (1) to rotate; the first motor (17) switches the rotational direction thereof, thereby correspondingly switching the transmission connection relationship between the switching mechanism (18) and the transmission mechanism (20) for conveyance and the transmission mechanism (21) for swinging.

3. Printer according to claim 2 characterized in that the outer peripheral surface of the transport member (1) around its axis of rotation comprises: a contact surface (1A) which has a first extension radian and contacts the printing sheet to drive the printing sheet to move, and a non-contact surface (1B) which has a second extension radian and can not contact the printing sheet; the contact surface (1A) and the non-contact surface (1B) alternately face the printing sheet (P) when the conveying member (1) rotates, so that the printing sheet (P) is intermittently driven to move.

4. The printer according to claim 1, wherein the carriage (12) has a first oscillation state in which the print roller (2B) and the thermal head (2A) are in a first close state, and a second oscillation state in which the print roller (2B) and the thermal head (2A) are in a second close state; the first close state is a state that the printing sheet and the ribbon are separated and can move independently respectively between the printing roller (2B) and the thermal head (2A), and the second close state is a state that the printing sheet and the ribbon are in contact and can only move synchronously between the printing roller (2B) and the thermal head (2A).

5. The printer according to claim 1, comprising: a pushing member (7) and a buffer member (8), wherein the buffer member (8) is provided with an elastic part (8A) which can elastically deform when pushed by the pushing member (7); one of the pushing element (7) and the buffering element (8) is configured to rotate with the conveying element (1), and the other is configured to be non-rotatable with the conveying element (1).