CN212289245U - Transmission of printer and printer - Google Patents

Abstract

The utility model provides a transmission device of a printer, which relates to the technical field of printing devices and comprises a transmission component, a supply component driven by the transmission component and used for supplying a carbon ribbon, and a furling component for furling the carbon ribbon transmitted from the supply component end; the reversing mechanism selectively transmits the power of the transmission assembly to one of the supply assembly or the take-up assembly so as to correspondingly reverse and forward convey the carbon ribbon. The supply assembly and the winding assembly selectively transmit the power of the transmission assembly to any one end of the carbon ribbon supply position and the winding position at the reversing mechanism, so that the power of the transmission assembly selectively drives one of the two ends to rotate, the carbon ribbon is transmitted only by the supply end or the winding end to realize the supply or the retraction of the carbon ribbon so as to adjust the position, the synchronous transmission of the carbon ribbon at the two ends is ensured all the time, the carbon ribbon is kept in a tight state all the time, the carbon ribbon is prevented from wrinkling, the smoothness of the printing process is ensured, and the printing quality is improved. The present application further provides a printer.

Description

Transmission of printer and printer

Technical Field

The utility model relates to a printing device technical field particularly, relates to a transmission and printer of printer.

Background

The working principle of the carbon ribbon in the thermal transfer printer is as follows: the carbon ribbon advances forward along with consumables such as labels, and the carbon ribbon is retrieved by the carbon ribbon recovery end. Due to the diversity of label sizes (label size and gap size between labels), requirements of optimizing the position of printing content on the label (avoiding waste and other problems caused by blank leaving), and the like, the position of the label paper must be adjusted once when the next new label is printed, and at the moment, the paper must reversely back together with the carbon ribbon, so that the problems of carbon ribbon waste or carbon ribbon wrinkles and the like are avoided.

In the prior art, a mechanism similar to a one-way bearing is generally arranged at each of the supply end and the recovery end of the carbon ribbon. However, in order to ensure the close fit and service life of the universal one-way bearing and the carbon ribbon chuck in the market, the one-way bearing and the carbon ribbon chuck are generally required to be integrally formed by plastic, so that the limitations of high cost, high manufacturing difficulty and the like are caused.

Still like the thermal transfer printer carbon ribbon rollback device disclosed in chinese patent CN203651220U, the recovery end of the carbon ribbon is provided with gears, and gear sets with equal transmission ratios are respectively arranged between the gears at the two ends and the output shaft gear of the stepping motor, under the condition of the same power source and equal transmission ratios, the same linear speed and synchronous action of the gears at the two ends are realized, so that the carbon ribbon is more stable in the printing process, the wrinkling probability of the carbon ribbon is reduced, and the printing quality is improved. However, the method has extremely high requirements on the degree of fit and the transmission precision between the gears, and has the problems of high difficulty in manufacturing and maintenance, and the like, and the gears are easy to be directly driven unevenly due to meshing abrasion or other factors, so that the rotating speeds of the supply end and the recovery end of the driving carbon ribbon are obviously different, and the problems of uneven transmission of the carbon ribbon and the like are caused, and the printing quality is influenced. Moreover, the linear velocities of the supply end gear and the recovery end gear of the carbon ribbon are the same and the motions are synchronous, so that the carbon ribbons arranged at the two ends cannot always have the same transmission speed, because the outer diameters of the two ends of the carbon ribbon are always changed due to the supply and the recovery of the carbon ribbons in the printing process, and the carbon ribbons at the supply position and the recovery position still have different transmission speeds even under the drive of the same rotating speed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a transmission and printer of printer aims at improving among the current printer transmission and realizes printing material and synchronous forward transport of carbon ribbon or reverse the returning through one-way bearing structure, the higher scheduling problem of the cost and the manufacturing degree of difficulty that lead to.

The utility model adopts the following scheme:

the transmission device of the printer comprises a transmission assembly, a feeding assembly and a winding assembly, wherein the feeding assembly is driven by the transmission assembly and is used for feeding a carbon ribbon, and the winding assembly is used for winding the carbon ribbon which is delivered from the end of the feeding assembly; the reversing mechanism selectively transmits the power of the transmission assembly to one of the supply assembly or the take-up assembly so as to correspondingly reverse and convey the carbon ribbon.

As a further improvement, the transmission assembly comprises a driving motor, a first gear set for transmitting power to the supply assembly and a second gear set for transmitting power to the furling assembly, and the driving motor transmits power to the first gear set and the second gear set simultaneously through a driving gear.

As a further improvement, the printing device further comprises a third gear set used for transmitting the power of the driving motor to the printing roller, and the third gear set is driven to rotate by the driving gear.

As a further improvement, the reversing mechanism comprises a reversing gear and a swing rod, the reversing gear is arranged on the swing rod, and the swing rod drives the reversing gear to swing so as to transmit power transmitted by the transmission assembly.

As a further improvement, the reversing mechanism comprises a first reversing assembly used for connecting or disconnecting the supply assembly and a second reversing assembly used for connecting or disconnecting the furling assembly.

As a further improvement, the first gear set is in transmission connection with the reversing gear of the first reversing assembly, and the second gear set is in transmission connection with the reversing gear of the second reversing assembly; and the first gear set and the second gear set are driven by the driving gear to relatively rotate.

As a further improvement, when the driving motor drives the driving gear to rotate forwardly, the driving gear is connected to the supply assembly corresponding to the first reversing assembly in a transmission manner, and the second reversing assembly is separated from the furling assembly relatively; when the driving motor drives the driving gear to rotate reversely, the driving gear is connected to the furling assembly in a transmission mode corresponding to the second reversing assembly, and the first reversing assembly is separated from the supply assembly relatively.

As a further improvement, the device further comprises a limiting mechanism which limits the positions of the first reversing assembly and the second reversing assembly after the first reversing assembly and the second reversing assembly are separated from the corresponding supply assembly and the corresponding furling assembly.

As a further improvement, the limiting mechanism comprises a limiting column, and the limiting column is arranged corresponding to the reversing mechanism to prevent the swing rods of the first reversing assembly and the second reversing assembly from moving continuously along the direction of separating from the supply assembly and the furling assembly, so that each reversing gear is relatively arranged on one side far away from the supply assembly or the furling assembly.

The application provides a printer in addition, including the printer organism and locate on the printer organism the print roll with transmission, the print roll passes through drive assembly drives the rotation in order to be conveyed forward or backward by the printed material.

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

the utility model provides a transmission of printer, the supply assembly of carbon ribbon and roll-up subassembly are at reversing mechanism optional arbitrary one end that passes to carbon ribbon supply department and roll-up department with transmission assembly's power, make one of them production rotation of drive assembly's power selection drive both ends department, thereby only realize the supply of carbon ribbon or roll-back with the adjustment position by supply end or roll-up end with the transmission of carbon ribbon, guarantee the synchronous transport all the time of carbon ribbon in both ends department, so that the carbon ribbon remains the tight state all the time, avoided the carbon ribbon fold, winding and hold back bad phenomenon such as, guarantee printing process smooth and easy and promoted printing quality, and simple structure, be convenient for installation and manufacturing use, effective reduce cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a transmission device according to embodiment 1 of the present invention at a first viewing angle;

fig. 2 is a schematic structural diagram of the transmission device according to embodiment 1 of the present invention at a second viewing angle, wherein the transmission assembly is driven by the first reversing assembly to transmit to the supply assembly, and the arrow in the diagram indicates the movement of the reversing assembly;

FIG. 3 is a schematic structural diagram of the transmission assembly in FIG. 2 driven by the second reversing assembly to transmit to the furling assembly;

fig. 4 is a schematic structural view of the transmission device according to embodiment 1 of the present invention at a third viewing angle;

FIG. 5 is an enlarged view of a portion of FIG. 4 at I;

fig. 6 is a schematic structural diagram of the transmission device according to embodiment 1 of the present invention at a fourth viewing angle, in which the first reversing component of the reversing mechanism is relatively disassembled;

fig. 7 is a schematic structural view of a transmission device according to embodiment 1 of the present invention at a fifth viewing angle;

fig. 8 is a schematic structural view of a transmission device according to embodiment 1 of the present invention at a sixth viewing angle;

fig. 9 is a schematic structural diagram of the transmission device according to embodiment 1 of the present invention at other viewing angles, wherein, for convenience of illustration, the third gear set portion is hidden, and the transmission assembly is driven by the first reversing assembly to transmit to the supply assembly;

FIG. 10 is a schematic structural diagram of the driving assembly of FIG. 9 driving the second reversing assembly to drive the retracting assembly;

fig. 11 is a sectional view of a printer according to embodiment 2 of the present invention;

fig. 12 is a schematic structural view of a printer according to embodiment 2 of the present invention.

Icon: 1-a transmission assembly; 11-a drive motor; 12-a drive gear; 13-a first gear set; 131-a first rotating tooth; 132-a rotating shaft; 14-a second gear set; 141-second rotating teeth; 15-a third gear set; 2-a supply assembly; 3-a furling assembly; 4-a reversing mechanism; 4A-a first commutation component; 4B-a second commutation component; 41-a reversing gear; 42-a swing rod; 5-a limiting column; 6-a spring element; 7-printer body; 8-a print roller; 9-dustproof cover body.

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. 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.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

With reference to fig. 1 to 3, the present embodiment provides a transmission device of a printer, which includes a transmission assembly 1, a feeding assembly 2 driven by the transmission assembly 1 and used for feeding a carbon ribbon, a winding assembly 3 for winding up the carbon ribbon coming out from the end of the feeding assembly 2, and a reversing mechanism 4.

Further, the reversing mechanism 4 selectively transmits the power of the transmission assembly 1 to one of the supply assembly 2 or the take-up assembly 3 so as to correspondingly reverse and convey the carbon ribbon in the reverse direction. Wherein, two ends of the carbon ribbon are respectively arranged on the reel at the supply component 2 and the reel at the take-up component 3, the carbon ribbon is driven by the rotation of the reel so as to convey the carbon ribbon along the printing direction to be supplied to a printing position to print the printing material, the carbon ribbon is conveyed along the opposite direction of printing to match with the printing material to synchronously adjust the printing position, moreover, the feeding component 2 and the furling component 3 of the carbon ribbon can selectively transmit the power of the transmission component 1 to any end of the carbon ribbon supply place and the furling place at the reversing mechanism 4, the carbon tape is conveyed only by the supply end or the winding end to realize carbon tape feeding (forward movement of the carbon tape) or retraction to adjust the position (backward movement of the carbon tape), the synchronous conveying of the carbon tape at the two ends is ensured, so that the carbon ribbon is always kept in a tight state, bad phenomena such as carbon ribbon wrinkles, winding and holding are avoided, smooth printing process is guaranteed, and printing quality is improved.

It should be noted that the supply unit 2 and the take-up unit 3 are linked with each other via the carbon tape, and when the reversing mechanism 4 selectively transmits the power of the transmission unit 1 to the supply unit 2, the supply unit 2 conveys the carbon tape in the opposite direction of printing to reversely retract the adjustment position, and at this time, the supply unit 2 rotating relatively drives the take-up unit 3 to rotate synchronously via the carbon tape. Similarly, when the reversing mechanism 4 selectively transmits the power of the transmission assembly 1 to the winding assembly 3, the winding assembly 3 conveys the carbon ribbon along the printing direction to supply the carbon ribbon to a printing position for printing on the printing material, and the winding assembly 3 which rotates relatively drives the supply assembly 2 to rotate synchronously through the carbon ribbon. The transmission device has simple structure and is convenient to install, manufacture and use.

In this embodiment, the transmission assembly 1 comprises a driving motor 11, a first gear set 13 for transmitting power to the supply assembly 2, a second gear set 14 for transmitting power to the take-up assembly 3, and a third gear set 15 for transmitting power of the driving motor 11 to the printing roller 8. The driving motor 11 transmits power to the first gear set 13 and the second gear set 14 simultaneously through the driving gear 12. The transmission connection between the driving motor 11 and the driving gear 12 may be a transmission manner such as a gear, a belt, a chain, or the like, so as to transmit the driving force of the forward and reverse rotation of the driving motor 11 to the driving gear 12, and correspondingly control the forward and reverse rotation of the driving gear 12. Wherein the third gear set 15 is driven in rotation by the driving gear 12. The driving motor 11 transmits power to the driving gear 12, so as to control the positive and negative rotation of the driving gear 12, and the positive and negative rotation is transmitted to the printing roller 8 to synchronously drive the printing roller 8 to convey printing consumables along the printing direction or reversely convey printing materials to adjust the printing position of the printing materials.

Referring to fig. 3 to 8, the reversing mechanism 4 includes a reversing gear 41 and a swing link 42. The reversing gear 41 is arranged on the swing rod 42, and the swing rod 42 drives the reversing gear 41 to swing so as to transmit power transmitted by the transmission assembly 1. Wherein, the transmission assembly 1 is in transmission connection with the reversing gear 41, and the reversing gear 41 is controlled to be relatively close to the feeding assembly 2 or the winding assembly 3 through the swinging of the swinging rod 42 so as to be in transmission connection or be far away from each other so as to release the transmission. The reversing gear 41 is in transmission connection with one of the feeding assembly 2 or the winding assembly 3 in a controllable manner, so that the power of the transmission assembly 1 is transmitted to the corresponding feeding assembly 2 or the winding assembly 3 through the reversing gear 41, the power is transmitted to one end of one of the carbon ribbon supply part and the winding part, one of the two ends of the carbon ribbon is selectively driven to rotate, and the carbon ribbon is ensured to be transmitted only by one of the supply end or the winding end.

In the present embodiment, the reversing mechanism 4 preferably includes a first reversing assembly 4A for connecting or disconnecting the feeding assembly 2 and a second reversing assembly 4B for connecting or disconnecting the furling assembly 3. The first reversing assembly 4A and the second reversing assembly 4B both include a reversing gear 41 and a swing link 42. The first gear set 13 is drivingly connected to the reversing gear 41 of the first reversing assembly 4A, and the second gear set 14 is drivingly connected to the reversing gear 41 of the second reversing assembly 4B. And the first gear set 13 and the second gear set 14 rotate relatively under the driving of the driving gear 12, when the driving gear 12 is driven by the driving motor 11 to rotate in the forward direction, the first reversing component 4A is connected to the supply component 2 in a transmission manner, and the second reversing component 4B is separated from the furling component 3 relatively. When the driving motor 11 drives the driving gear 12 to rotate reversely, the driving gear is connected to the furling assembly 3 in a transmission way corresponding to the second reversing assembly 4B, and the first reversing assembly 4A is separated from the supply assembly 2 relatively. Correspondingly, in order to reversely retract the carbon ribbon to adjust the position (at the moment, the printing roller 8 correspondingly adjusts the printing consumables in the reverse printing direction), the driving motor 11 drives the gear 12 to rotate in the forward direction, and the first reversing component 4A is in transmission connection with the supply component 2 so as to transmit power to the supply component 2. In order to convey the carbon tape forward to supply the carbon tape (at this time, the printing roller 8 correspondingly conveys printing consumables along the printing direction), the driving motor 11 drives the driving gear 12 to rotate reversely at this time, and the furling assembly 3 of the second reversing assembly 4B is in transmission connection with the furling assembly 3 so as to transmit power to the furling assembly 3.

Referring to fig. 6 to 10, in order to rotate the driving gear 12 forward and backward, the printing consumables are fed along the printing direction in synchronization with the feeding of the thermal tape, or the printing materials are fed along the printing direction in synchronization with the feeding of the thermal tape and adjusted in the printing position. In the present embodiment, the supply assembly 2 and the retraction assembly 3 are respectively located at the left and right sides of the transmission assembly 1, and the first gear set 13 and the second gear set 14 are respectively disposed at the left and right sides of the driving gear 12 in a meshed manner, and the third gear set 15 is disposed at a position above the driving gear 12 in a relatively meshed manner, so that the gear sets rotate relatively. In the present embodiment, the first secondary gear set 13, the second gear set 14 and the third gear set 15 are all driven by the driving gear 12 to share the same driving source. The driving gear 12 rotates positively and reversely relatively, the corresponding reversing mechanism 4 guides the power of the driving gear 12 to the supply component 2 or the take-up component 3 respectively, only one of the two components is controlled by the driving of the driving gear 12, and the other component is connected through the carbon belt and linked relatively, so that the two components synchronously rotate under the condition that one end of the two components is subjected to the driving force to smoothly transmit the carbon belt. Wherein, the driving gear 12 rotates in a forward direction, and the corresponding triggering of the first reversing component 4A causes the driving gear 12 to transmit power only to the feeding component 2 via the first gear set 13, so that the feeding component 2 rotates in a reverse direction relatively to retract the carbon ribbon in a printing reverse direction to realize the retraction of the carbon ribbon, and at this time, the driving gear 12 is transmitted to the printing roller 8 via the third gear set 15, so that the printing roller 8 conveys and adjusts the printing position of the printing material in the printing reverse direction, and the printing position adjustment is performed. The driving gear 12 rotates reversely relatively, the corresponding second reversing component 4B is triggered to enable the driving gear 12 to only transmit power to the furling component 3 through the second gear set 14, so that the furling component 3 rotates forward relatively to pull the carbon ribbon along the printing direction to realize the supply of the carbon ribbon, and at the moment, the driving gear 12 is transmitted to the printing roller 8 through the third gear set 15, so that the printing roller 8 conveys printing consumables along the printing direction to perform printing operation.

Further, the first gear set 13 includes a first rotating tooth 131, and the second gear set 14 includes a second rotating tooth 141. The first rotating teeth 131 and the second rotating teeth 141 are respectively disposed on the left and right sides of the driving gear 12 in a meshing manner. The first reversing assembly 4A is configured to be linked with the first rotating tooth 131, the swing link 42 of the first reversing assembly 4A is rotatably sleeved on the rotating shaft 132 where the first rotating tooth 131 is located, and the reversing gear 41 configured on the swing link 42 is meshed with the first rotating tooth 131, so that the swing link 42 is driven by a radial acting force generated by meshing between the gears under the meshing rotation of the first rotating tooth 131 and the reversing gear 41, so that the swing link drives the reversing gear 41 to relatively move along the periphery of the first rotating tooth 131 until the reversing gear 41 moves to be connected to the supplying assembly 2, and accordingly, the power transmission is completed. Correspondingly, the manner of the second reversing component 4B located at the other side and the second rotating tooth 141 in linkage to realize reversing to complete power transmission is the same as that described above, and is not described herein again.

Specifically, the reversing mechanism 4 can selectively transmit the power of the transmission assembly 1 to one of the supply assembly 2 or the take-up assembly 3 for realizing convenience. In the present embodiment, the first rotating teeth 131 and the second rotating teeth 141 are driven by the same driving gear 12 to respectively provide the power transmission at the end of the winding assembly 3 or the power transmission at the end of the supply assembly 2 in different rotation directions without interfering with each other, and at the same time, a rotation direction (forward rotation or reverse rotation of the driving gear 12) only enables the supply assembly 2 or the winding assembly 3 to rotate at one position.

The driving gear 12 rotates to control the first rotating teeth 131 and the second rotating teeth 141 disposed at two sides in a meshing manner to drive the reversing gear 41 at the respective positions to move in the same direction along the peripheral direction of each rotating tooth. And when the reversing gear 41 at the first rotating tooth 131 moves (in the direction of the arrow in fig. 2 and 9) to be in transmission connection with the supply assembly 2, the reversing gear 41 at the corresponding second rotating tooth 141 moves to a position separated from the furling assembly 3 and is limited relatively at the position, so that the reversing gear 41 at the separated position is limited to continuously move around the periphery of the second rotating tooth 141, and the meshing transmission of other gear sets is prevented from being interfered or the reversing gear 41 at the separated position moves to be in transmission connection with the furling assembly 3 again. Correspondingly, when the reversing gear 41 at the second rotating tooth 141 moves (in the direction of the arrow in fig. 3 and 10) to be in transmission connection with the winding assembly 3, the reversing gear 41 at the corresponding first rotating tooth 131 moves to the position where the reversing gear is separated from the feeding assembly 2 and is limited in position, so that the reversing gear 41 at the separated position is limited to continuously move around the periphery of the first rotating tooth 131, and the meshing transmission of other gear sets is prevented from being interfered or the reversing gear 41 at the separated position is moved to be in transmission connection with the feeding assembly 2 again.

For convenience of explanation, it is defined that each gear rotates in the forward direction as a clockwise direction and in the reverse direction as a counterclockwise direction. The driving gear 12 rotates forward, so that the first rotating tooth 131 and the second rotating tooth 141 both rotate in reverse directions, and correspondingly, the reversing gear 41 on the first rotating tooth 131 and the second rotating tooth 141 both rotate in forward directions, so that the oscillating bar 42 drives the reversing gear 41 to synchronously swing leftward under the driving of the radial force of the gear engagement, and only the transmission to the supply assembly 2 on the left side is achieved. The driving gear 12 rotates reversely, so that the first rotating tooth 131 and the second rotating tooth 141 both rotate in the forward direction, and correspondingly, the reversing gear 41 on the first rotating tooth 131 and the second rotating tooth 141 both rotate in the reverse direction, so that the oscillating bar 42 drives the reversing gear 41 to synchronously swing rightward under the driving of the radial force of the gear engagement, and only the transmission is made to the furling assembly 3 on the right side.

In particular, the reversing gear 41 is moved to the position where the reversing gear is separated from the reversing gear and is limited relatively at the position. In this embodiment, a limiting mechanism (not shown) is further included. The limiting mechanism limits the positions of the first reversing assembly 4A and the second reversing assembly 4B after the first reversing assembly and the second reversing assembly are separated from the corresponding supply assembly 2 and the corresponding furling assembly 3. The limiting mechanism comprises a limiting column 5, the limiting column 5 is correspondingly arranged with the reversing mechanism 4 to prevent the swing rods 42 of the first reversing assembly 4A and the second reversing assembly 4B from continuously moving along the directions of separating from the supply assembly 2 and retracting assembly 3 correspondingly, so that each reversing gear 41 is relatively arranged on one side far away from the supply assembly 2 or retracting assembly 3. Each swing rod 42 is correspondingly matched with a limiting column 5, and the limiting column 5 is arranged on the path of one side of the swing rod 42, which is separated from the transmission, so that the swing rod 42 is abutted to limit the continuous movement of the swing rod 42. The two limit columns 5 are oppositely arranged at intervals, and the problems of interference and the like caused by overlarge swing path of each swing rod 42 are avoided. It should be mentioned that, all gears are engaged with each other in the transmission process to avoid the situation that the gears are locked to each other to cause damage and the like.

Referring to fig. 4, 5 and 6, preferably, the meshing plane where the driving gear 12 and the first and second rotating teeth 131 and 141 are located is located on a different meshing plane than the meshing plane where the first and second rotating teeth 131 and 141 and the respective reversing gear 41 are located. The first rotating teeth 131 and the second rotating teeth 141 have different meshing surfaces which are coaxially arranged, so that the first rotating teeth and the second rotating teeth are meshed with the driving gear 12 and the reversing gear 41 on different meshing planes, and meshing transmission among the gears is further ensured. In the present embodiment, the transmission connection between the supply assembly 2 and the take-up assembly 3 and the respective reversing gear 41 is preferably in a gear engagement manner. The reversing gears 41 are elastically abutted to the respective meshing planes by the spring pieces 6, the spring pieces 6 are arranged between the reversing gears 41 and the swing rods 42 in a compressed mode, one end of each spring piece is abutted to the end face of the reversing gear 41, and the other end of each spring piece is abutted to the end face of the swing rod 42. And the reversing gear 41 at the supply assembly 2 and the supply assembly 2 are in the same meshing plane, and the reversing gear 41 at the take-up assembly 3 and the take-up assembly 3 are in the same meshing plane.

With reference to fig. 8, fig. 11 and fig. 12, the present application provides a printer in addition, including printer body 7, and locate print roller 8 on printer body 7 and the transmission, print roller 8 drives the rotation through drive assembly 1 in order to be printed the material forward or backward conveying, and print roller 8's conveying links mutually with the transport of carbon ribbon, thereby print roller 8 carries the printing consumables along printing direction (printing material forward conveying) when having ensured to supply the carbon ribbon, or print roller 8 carries the printing position of adjustment printing material along printing opposite direction (printing material backward conveying) when rolling back the carbon ribbon.

Wherein, the transmission device is configured at one side of the printer body 7, and the limit column 5 is relatively arranged on the side wall of the printer body 7, so as to be used for protruding to limit each swing link 42 to continuously move towards the direction far away from the supply component 2 or the furling component 3. Preferably, a dust-proof cover 9 for covering the transmission device to prevent transmission interference from foreign matters such as external dust is provided on the side of the printer body 7 where the transmission device is provided, thereby hiding and protecting the transmission device.

Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection.

Claims (10)

1. The transmission device of the printer comprises a transmission assembly, a supply assembly and a winding assembly, wherein the supply assembly is driven by the transmission assembly and is used for supplying a carbon ribbon, the winding assembly is used for winding the carbon ribbon coming out from the end of the supply assembly, and the transmission device is characterized by further comprising a reversing mechanism, and the reversing mechanism selectively transmits the power of the transmission assembly to one of the supply assembly and the winding assembly so as to correspondingly reverse and forward feed the carbon ribbon.

2. The transmission of claim 1, wherein the transmission assembly includes a drive motor, a first gear set for transmitting power to the supply assembly, and a second gear set for transmitting power to the take-up assembly, the drive motor transmitting power to the first gear set and the second gear set simultaneously via a drive gear.

3. The transmission of claim 2, further comprising a third gear set for transmitting power from the drive motor to the print roller, the third gear set being driven for rotation by the drive gear.

4. The transmission of claim 3, wherein the reversing mechanism includes a reversing gear and a rocker arm, the reversing gear is disposed on the rocker arm, and the rocker arm drives the reversing gear to oscillate to transmit power from the transmission assembly.

5. The transmission of claim 4, wherein the reversing mechanism includes a first reversing component for coupling to or decoupling from the supply component and a second reversing component for coupling to or decoupling from the take-up component.

6. The transmission of claim 5, wherein the first gear set is drivingly connected to the reversing gear of the first reversing component and the second gear set is drivingly connected to the reversing gear of the second reversing component; and the first gear set and the second gear set are driven by the driving gear to relatively rotate.

7. The transmission device according to claim 5, wherein when the driving motor drives the driving gear to rotate forward, the driving gear is connected to the supply assembly corresponding to the first reversing assembly in a transmission manner, and the second reversing assembly is separated from the furling assembly relatively; when the driving motor drives the driving gear to rotate reversely, the driving gear is connected to the furling assembly in a transmission mode corresponding to the second reversing assembly, and the first reversing assembly is separated from the supply assembly relatively.

8. The transmission of claim 5, further comprising a limiting mechanism that limits the position of the first reversing assembly and the second reversing assembly after disengaging the respective supply assembly and take-up assembly.

9. The transmission device according to claim 8, wherein the limiting mechanism includes a limiting post, and the limiting post is disposed corresponding to the reversing mechanism to prevent the swing rods of the first reversing assembly and the second reversing assembly from moving continuously in a direction away from the supply assembly and the take-up assembly, so that the reversing gears are disposed on a side away from the supply assembly or the take-up assembly.

10. A printer comprising a printer body, a printing roller arranged on the printer body and a transmission device as claimed in any one of claims 1 to 9, wherein the printing roller is driven to rotate by the transmission assembly to convey a printed material forwards or backwards.

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