阅读说明：本技术 碳带传输磁性离合装置、热转印打印机和工作方法 (Carbon ribbon transmission magnetic clutch device, thermal transfer printer and working method ) 是由 刘瑞垠 李桂海 林艳青 于 2019-10-29 设计创作，主要内容包括：本发明涉及一种碳带传输磁性离合装置、热转印打印机和工作方法,碳带传输磁性离合装置包括机架(1),所述机架(1)上设置有相互平行且转向相同的碳带释放轴(2)和碳带回收轴(3),碳带释放轴(2)和碳带回收轴(3)的第二端分别设置有释放离合机构A(7)和回收离合机构B(8),本发明具有以下效果：本发明结构紧凑、设计合理,磁性环与铁环的配合使用使得不再需要复杂的结构提供摩擦力,有利于实现整机整体的小型化；释放端及回收端需要的零部件可共用互换且数量少,不需要额外的紧固件,制作成本低,整体便于拆装和维护；通过对发条的应用,简化了安装工艺。(The invention relates to a carbon ribbon transmission magnetic clutch device, a thermal transfer printer and a working method, wherein the carbon ribbon transmission magnetic clutch device comprises a rack (1), a carbon ribbon release shaft (2) and a carbon ribbon recovery shaft (3) which are parallel to each other and have the same rotation direction are arranged on the rack (1), and a release clutch mechanism A (7) and a recovery clutch mechanism B (8) are respectively arranged at the second ends of the carbon ribbon release shaft (2) and the carbon ribbon recovery shaft (3), so that the thermal transfer printer has the following effects: the magnetic ring is compact in structure and reasonable in design, and the magnetic ring and the iron ring are matched for use, so that a complex structure is not needed to provide friction force, and the whole miniaturization of the whole machine is facilitated; parts required by the release end and the recovery end can be shared and exchanged, the number is small, additional fasteners are not needed, the manufacturing cost is low, and the whole structure is convenient to disassemble, assemble and maintain; through the application of the spiral power spring, the installation process is simplified.)

1. The utility model provides a carbon ribbon transmission magnetism clutch which characterized in that: the carbon ribbon release mechanism comprises a rack (1), wherein a carbon ribbon release shaft (2) and a carbon ribbon recovery shaft (3) which are parallel to each other and have the same steering direction are arranged on the rack (1), a release clutch mechanism A (7) and a recovery clutch mechanism B (8) are respectively arranged at the second ends of the carbon ribbon release shaft (2) and the carbon ribbon recovery shaft (3), the release clutch mechanism A (7) comprises a first carbon ribbon gear shaft (701), a first magnetic ring (702), a first iron ring (703), a first spring seat (704), a first spring (705) and a first left knob (707) which are sequentially arranged on the first carbon ribbon gear shaft (701), and the first spring (705) provides an anticlockwise tensioning force when the first carbon ribbon release shaft (2) rotates clockwise; the recycling clutch mechanism B (8) comprises a second carbon ribbon gear shaft (801), a second magnetic ring (802), a second iron ring (803), a second spring seat (804), a second spring (805) and a second left knob (806), wherein the second magnetic ring (802), the second iron ring (803), the second spring seat (804), the second spring (805) and the second left knob (806) are sequentially arranged on the second carbon ribbon gear shaft (801), and the second spring (805) provides a clockwise tensioning force when the carbon ribbon recycling shaft (3) rotates clockwise.

2. The carbon ribbon transport magnetic clutch apparatus of claim 1, wherein: the carbon ribbon recovery shaft (3) is driven to rotate by a motor gear assembly on the left side, and one end of the carbon ribbon release shaft (2) and one end of the carbon ribbon recovery shaft (3) on the right side are supported and connected with the rack (1) through a right rotating button.

3. The carbon ribbon transport magnetic clutch apparatus of claim 1, wherein: and a carbon ribbon detection label (706) is arranged among the first spring seat (704), the first spring (705) and the first left knob (707).

4. The carbon ribbon transport magnetic clutch apparatus of claim 3, wherein: the first magnetic ring (702), the first iron ring (703), the first spring seat (704), the first spring (705), the first carbon ribbon detection label (706) and the first left knob (707) are sequentially sleeved into the first carbon ribbon gear shaft (701), the first magnetic ring (702) is fixed on the first carbon ribbon gear shaft (701) through a slotted hole, the first iron ring (703) is fixed on the first spring seat (704) through a slotted hole, one end of the inner side of the first spring (705) is fixed in the groove of the first spring seat (704), one end of the outer side of the first spring (705) is fixed in the groove of the first left knob (707), the carbon ribbon detection label (706) is adhered on the first left knob (707), and the first carbon ribbon gear shaft (701) prevents the first left knob (706) from falling out through the first clamping hook (708) on the shaft.

5. The carbon ribbon transport magnetic clutch apparatus of claim 1, 2, 3, or 4, wherein: the second magnetic ring (802), the second iron ring (803), the second spring seat (804), the second spring (805) and the second left knob (806) are sequentially sleeved into the second carbon ribbon gear shaft (801), the second magnetic ring (802) is fixed on the second carbon ribbon gear shaft (801) through a slotted hole, the second iron ring (803) is fixed on the second spring seat (804) through a slotted hole, one end of the inner side of the second spring (805) is fixed in a groove of the second spring seat (804), one end of the outer side of the second spring (805) is fixed in a groove of the second left knob (806), and the second carbon ribbon gear shaft (801) prevents the second left knob (806) from falling off through a second clamping hook (807) on the shaft.

6. The carbon ribbon transport magnetic clutch apparatus of claim 3, wherein: the carbon ribbon release device is characterized in that a carbon ribbon detection sensor (6) is arranged at the mounting position of the rack (1) and the carbon ribbon release shaft (2), an induction window of the carbon ribbon detection sensor (6) is arranged on the rack (1), and black and white alternate reflecting surfaces are uniformly distributed on the surface of the carbon ribbon detection label (706) facing the carbon ribbon detection sensor (6).

7. The carbon ribbon transport magnetic clutch apparatus of claim 1, wherein: the carbon ribbon recovery device is characterized in that a rubber roller shaft (5) is arranged on the rack (1), a paper feeding gear (14) is arranged at one end of the rubber roller shaft (5) which is located at the same side as the recovery structure B (8), the direction of the rubber roller shaft (5) is opposite to that of the carbon ribbon release shaft (2), a thermal head (4) is arranged above the rubber roller shaft (5), a spring (16) is arranged between the upper side face of the thermal head (4) and the rack (1), the rear portion of the thermal head (4) is hinged to the rack (1), the front portion of the thermal head (4) presses against the rubber roller shaft (5), and the carbon ribbon is led out by the carbon ribbon release shaft (2) to penetrate through a pressing area between the thermal head (4) and the rubber roller shaft.

8. The carbon ribbon transport magnetic clutch apparatus of claim 2, wherein: the power assembly of the motor gear assembly comprises a motor (17), an output gear (11) is arranged on an output shaft of the motor (17), the output gear (11) is in meshing transmission with a transition gear (12), the transition gear (12) is in meshing transmission with a reduction gear (13), the reduction gear (13) is in meshing transmission with a paper feeding gear (14), and the paper feeding gear (14) is in transmission with a second carbon tape gear shaft (801) through a first carbon tape transmission gear (10) and a second carbon tape transmission gear (9) which are arranged on a rack (1).

9. A thermal transfer printer, characterized by: a thermal transfer printer using the thermal transfer magnetic clutch apparatus according to any one of claims 1 to 8.

10. A method of operating a carbon ribbon transport magnetic clutch as defined in any one of claims 1 to 8, characterized by: the first carbon ribbon gear shaft (701) is fixed on the rack (1), the first spring seat (704) is kept relatively fixed under the attraction action of the first magnetic ring (702) and the first iron ring (703), when the carbon ribbon (15) pulls the carbon ribbon to move under the action of the rubber roller shaft (5) and the thermal head (4), the carbon ribbon release shaft (2) is driven to rotate, the carbon ribbon release shaft (2) further drives the first left knob (707) to drive the first spring (705) to tighten, the reaction force of the first spring (705) hinders the rotation of the carbon ribbon release shaft (2), and the carbon ribbon release end is in a tightened state; after the first clockwork spring (705) is tensioned, the carbon ribbon release shaft (2) continues to rotate, the attraction force between the first magnetic ring (702) and the first iron ring (703) is overcome, the first magnetic ring (702) and the first iron ring (703) relatively rotate, the phenomenon of slip and idle rotation occurs, the carbon ribbon (15) is released, and meanwhile, the release end of the carbon ribbon (15) is kept in a tensioned state under the action of the first clockwork spring (705); the carbon ribbon (15)) recovery end is in a tensioned state under the rotation of the carbon ribbon recovery shaft (3), under the condition that the rotation speed of the carbon ribbon recovery shaft (3) is constant, when the carbon ribbon recovery shaft (3) continuously recovers the ribbon, the outer diameter of the ribbon recovery end is increased, the linear speed of the carbon ribbon (15) is increased, in order to prevent the linear speed of the carbon ribbon (15) from being asynchronous with the paper feeding speed, when the speed of the carbon ribbon (15) is about to be greater than the paper feeding speed, the carbon ribbon gear shaft (801) overcomes the attraction between the second magnetic ring (802) and the second iron ring (803), so that the second magnetic ring (802) and the second iron ring (803) rotate relatively to generate a slip and idle rotation phenomenon, and further solve the problem that the linear speed of the carbon ribbon is asynchronous with the paper feeding speed, and the recovery end of the carbon ribbon (15) is kept in a tensioned state under the action of the second spiral spring (805).

The technical field is as follows:

the invention belongs to the technical field of thermal printing equipment, and particularly relates to a thermal transfer printer, a thermal transfer belt transmission magnetic clutch device and a working method.

Background art:

the thermal transfer printer controls the heating element in the thermal head to generate heat, so that the oil film on the carbon ribbon film is converted from a solid state into a liquid state under heating and is transferred to a printing medium, and the storage time of the printing content is much longer than that of thermal transfer printing paper and is not easy to scratch; therefore, the thermal transfer printer is widely applied to printing bar code labels, face sheets and the like in the fields of postal service, transportation, business overload, logistics and the like.

In order to ensure good printing quality, the moving speed of the thermal transfer ribbon needs to be ensured to be synchronous with the paper feeding speed, and at present, the thermal transfer ribbon transmission structure of a common thermal transfer printer generally has the following problems:

1. the carbon tape is not tensioned at the tape collecting end and the releasing end or needs to be retracted during printing, so that the carbon tape is easy to wrinkle or loosen, and poor printing quality is caused.

2. Along with the continuous grow of carbon ribbon external diameter of carbon ribbon receipts area end, under the unchangeable condition of carbon ribbon rotational speed, the tape transport speed of carbon ribbon increases, then probably breaks the carbon ribbon or prints the quality poor, in order to avoid above-mentioned condition to take place, just need set up clutching mechanism on the carbon ribbon retrieves epaxially.

The existing carbon belt transmission clutch mechanism has the defects of large quantity of parts, incapability of mutual replacement, complex production and manufacture and high cost.

The invention content is as follows:

in view of the above, the present invention provides a magnetic clutch device for carbon ribbon transportation, a thermal transfer printer and a working method thereof, which can solve the problems of the prior art, such as a large number of mechanism parts, incapability of mutual replacement, complicated production and manufacture, and high cost.

The invention relates to a carbon ribbon transmission magnetic clutch device, which is characterized in that: the carbon ribbon release mechanism comprises a rack, wherein a carbon ribbon release shaft and a carbon ribbon recovery shaft which are parallel to each other and have the same steering direction are arranged on the rack, a release clutch structure A and a recovery clutch structure B are respectively arranged at the second ends of the carbon ribbon release shaft and the carbon ribbon recovery shaft, the release clutch structure A comprises a first carbon ribbon gear shaft, a first magnetic ring, a first iron ring, a first spring seat, a first spring and a first left knob, which are sequentially arranged on the first carbon ribbon gear shaft, and the first spring provides an anticlockwise tensioning force when the first carbon ribbon release shaft rotates clockwise; retrieve clutch structure B and include second carbon ribbon gear shaft and set gradually second magnetism ring, second hoop, second spring seat, second spring, the left knob of second on the second carbon ribbon gear shaft, the second spring provides a clockwise tensile force when the carbon ribbon retrieves axle clockwise rotation.

Furthermore, the carbon ribbon recovery shaft is driven to rotate by the motor gear assembly on the left side, and the end, on the right side, of the carbon ribbon release shaft and the end, on the right side, of the carbon ribbon recovery shaft are connected with the rack through a right rotating button in a supporting mode.

Furthermore, a carbon ribbon detection label is arranged among the first spring seat, the first spring and the first left-handed button.

Furthermore, above-mentioned first magnetism ring, first hoop, first spring seat, first clockwork spring, first carbon ribbon detects the label, first levogyration button embolias first carbon ribbon gear shaft in proper order, first magnetism ring passes through the slotted hole to be fixed on first carbon ribbon gear shaft, first hoop passes through the slotted hole to be fixed on first spring seat, the inboard one end of first spring is fixed in the groove of first spring seat, first spring outside one end is fixed in the groove of first left knob, carbon ribbon detects the label and glues on first left knob, first carbon ribbon gear shaft prevents through the epaxial first trip that first levogyration button from deviating from.

Furthermore, the second magnetic ring, the second iron ring, the second spring seat, the second spring and the second left-handed button are sequentially sleeved into the second carbon ribbon gear shaft, the second magnetic ring is fixed on the second carbon ribbon gear shaft through a slotted hole, the second iron ring is fixed on the second spring seat through a slotted hole, one end of the inner side of the second spring is fixed in a groove of the second spring seat, one end of the outer side of the second spring is fixed in a groove of the second left-handed button, and the second left-handed button is prevented from being disengaged by the second carbon ribbon gear shaft through an axial second clamping hook.

Furthermore, the installation positions of the rack and the carbon ribbon release mechanism A are provided with a carbon ribbon detection sensor, the rack is provided with a carbon ribbon detection sensor induction window, and black and white reflecting surfaces are uniformly distributed on the surface of the carbon ribbon detection label facing the carbon ribbon detection sensor.

Further, a rubber roll shaft is arranged on the rack, a gear is arranged at one end of the rubber roll shaft, which is on the same side with the recovery mechanism B, the rubber roll shaft and the carbon ribbon release shaft are opposite in rotation direction, a thermal head is arranged above the rubber roll shaft, a spring is arranged between the upper side surface of the thermal head and the rack, the rear part of the thermal head is hinged with the rack, the front part of the thermal head presses against the rubber roll shaft, and the carbon ribbon is led out by the carbon ribbon release shaft, penetrates through a pressing area between the thermal head and the rubber roll shaft and then is led into.

Furthermore, the power assembly of the motor gear assembly is a motor, an output gear is arranged on an output shaft of the motor, the output gear is in meshing transmission with a transition gear, the transition gear is in meshing transmission with a reduction gear, the reduction gear is in meshing transmission with a paper feeding gear, and the paper feeding gear is in transmission with a second carbon tape gear shaft through a first carbon tape transmission gear and a second carbon tape transmission gear which are arranged on the rack.

The thermal transfer printer of the present invention is characterized in that: a thermal transfer printer using the thermal transfer magnetic clutch apparatus according to any one of claims 1 to 8.

The invention relates to a working method of a carbon ribbon transmission magnetic clutch device, which is characterized in that: the first carbon ribbon gear shaft is fixed on the rack, the first spring seat is kept relatively fixed under the attraction of the first magnetic ring and the first iron ring, when the carbon ribbon pulls the carbon ribbon to move under the action of the rubber roll shaft and the thermal head, the carbon ribbon release shaft is driven to rotate, the carbon ribbon release shaft further drives the first left-handed button to drive the first spring to tighten, and the reaction force of the first spring hinders the rotation of the carbon ribbon release shaft, so that the carbon ribbon release end is in a tightened state; when the first spring is tensioned, the carbon ribbon release shaft continues to rotate, the attraction between the first magnetic ring and the first iron ring is overcome, the first magnetic ring and the first iron ring rotate relatively, the phenomenon of slip and idle rotation occurs, the effect of releasing the carbon ribbon is achieved, and meanwhile, the carbon ribbon release end is kept in a tightened state under the effect of the first spring; the carbon ribbon recovery end is in the state of tightening under the rotation of the carbon ribbon recovery shaft, under the certain condition of the rotating speed of the carbon ribbon recovery shaft, along with the continuous belt recovery of the carbon ribbon, the outer diameter of the recovery end can be increased, at the moment, the linear velocity of the carbon ribbon is inevitably increased, the linear velocity of the carbon ribbon is not synchronous with the paper feeding speed, when the speed of the carbon ribbon is larger than the paper feeding speed, the attraction between the second magnetic ring and the second iron ring is overcome by the second carbon ribbon gear shaft, the second magnetic ring and the second iron ring are relatively rotated, the phenomenon of slip and idle rotation occurs, the problem that the linear velocity of the carbon ribbon is not synchronous with the paper feeding speed is further solved, and the carbon ribbon is in the state of tightening under the action of the second clockwork spring.

Compared with the prior art, the invention has the following effects: the magnetic ring is compact in structure and reasonable in design, and the magnetic ring and the iron ring are matched for use, so that a complex structure is not needed to provide friction force, and the whole miniaturization of the whole machine is facilitated; parts needed by the releasing end and the recovery end can be shared and exchanged, the number is small, the manufacturing cost is low, and the whole structure is convenient to disassemble, assemble and maintain; through the application of the spiral power spring, the installation process is simplified.

Description of the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the structure of the present invention;

FIG. 3 is an exploded view of the structure of the carbon ribbon release shaft;

FIG. 4 is an exploded view of the structure of a carbon ribbon take-up shaft;

FIG. 5 is a schematic perspective view of a ribbon release shaft

FIG. 6 is a schematic perspective view of a ribbon release shaft and a ribbon recovery shaft;

FIG. 7 is a schematic perspective view of a ribbon release mechanism from one perspective;

FIG. 8 is a schematic perspective view of another perspective view of a carbon ribbon release mechanism;

FIG. 9 is an exploded perspective view of FIG. 7;

FIG. 10 is an exploded perspective view of FIG. 8;

FIG. 11 is a perspective view of a ribbon recovery mechanism;

FIG. 12 is an exploded perspective view of the ribbon recovery mechanism;

FIG. 13 is an exploded perspective view of another perspective of the ribbon recovery mechanism;

FIG. 14 is a schematic view of the construction of a second spring;

in the figure:

1-a frame; 2-a ribbon release shaft; 3-carbon ribbon recovery shaft; 4-a thermal head; 5-a rubber roll shaft; 6-a carbon ribbon detection sensor; 7-a carbon ribbon release mechanism; 8-a carbon ribbon recovery mechanism; 9-a second ribbon drive gear; 10-a first ribbon drive gear; 11-an output gear; 12-a transition gear; 13-a reduction gear; 14-a paper feed gear; 15-carbon ribbon; 16-a spring; 17-motor.

The specific implementation mode is as follows:

in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to specific embodiments and accompanying drawings.

As shown in fig. 1 to 5, a carbon ribbon transmission magnetic clutch device includes a frame 1, a carbon ribbon release shaft 2 and a carbon ribbon recovery shaft 3 which are parallel to each other and rotate in the same direction are disposed on the frame 1, the carbon ribbon recovery shaft 3 is driven by a left power assembly to rotate, one end of the carbon ribbon release shaft 2 and one end of the carbon ribbon recovery shaft 3 on the right side are supported and connected to the frame 1 through a right-handed knob, the other end is respectively provided with a release clutch structure 7 and a recovery clutch structure 8, the release clutch structure 7 includes a first carbon ribbon gear shaft 701, a first magnetic ring 702, a first iron ring 703, a first spring seat 704, a first spring 705, a carbon ribbon detection tag 706 and a first left knob 707 which are sequentially disposed, the first carbon ribbon release shaft 2 provides an anticlockwise tension when rotating clockwise, and the carbon ribbon 15 needs to have a reverse tension when releasing, the carbon belt 15 is always in a tensioning state in the process of belt walking; the recycling clutch structure 8 comprises a second carbon ribbon gear shaft 801, a second magnetic ring 802, a second iron ring 803, a second spring seat 804, a second spring 805 and a second left knob 806 which are sequentially arranged, and the second spring 805 provides a clockwise tension when the carbon ribbon recycling shaft 3 rotates clockwise.

In this embodiment, a second magnetic ring 802, a second iron ring 803, a second spring seat 804, a second spring 805 and a second left knob 806 are sequentially sleeved into a second carbon ribbon gear shaft 801, the second magnetic ring 802 is fixed on the second carbon ribbon gear shaft 801 through a slotted hole, four convex keys 812 are uniformly distributed on the second carbon ribbon gear shaft 801, a key slot hole 813 matched with the convex keys is arranged in a central hole of the second magnetic ring 802, and the key slot hole is matched with the convex keys, so that the second magnetic ring 802 is sleeved on the second carbon ribbon gear shaft 801 and cannot rotate; the second iron ring 803 is fixed on the second spring seat 804 through a slotted hole, four convex keys are uniformly distributed on the second spring seat 804, a key slot hole matched with the convex keys is formed in a center hole of the second iron ring 803, the key slot hole is matched with the convex keys, the second iron ring 803 is sleeved on the second spring seat 804 and cannot rotate, and the second spring seat 804 and the second iron ring 803 form an integral body which can rotate on the second carbon ribbon gear shaft 801 under the condition of overcoming the magnetic attraction.

One end of the inner side of the second spring 805 is fixed in a groove of a second spring seat 804, one end of the outer side of the second spring 805 is fixed in a groove of a second left knob 806, the head and the tail end of the second spring 805 are both provided with a bending part (the structure of the bending part is the same as that of the first spring), the bending part comprises a long piece 8051, a return piece 8052 and a vertical connecting piece 8053 which are sequentially connected, the long piece 8051 is parallel to the return piece 8052, the return piece is shorter than the long piece, the vertical connecting piece 8053 is vertically connected with the return piece 8052, the vertical connecting piece is connected with the head and the tail end of the second spring 805, one side of the second spring seat 804 facing the second spring 805 is provided with a second inner convex ring 808, the second inner convex ring 808 is arranged on the second inner convex ring 808, the vertical connecting piece 8053 at the inner end of the second spring 805 is clamped in a second inner concave groove 809, one side of the second left knob 806 facing the second spring 805 is provided with a second convex ring 810, the second convex ring 810 is provided with a second concave groove 811, the bent part of the outer end of the second spring 805 is clamped in the second outer slot 811.

The second carbon ribbon gear shaft 801 prevents the second left knob 806 from coming off through the second hook 807 on the shaft, when the power assembly is driven, the second carbon ribbon gear shaft 801 and the second magnetic ring 802 rotate together, the second iron ring 803 rotates along with the second magnetic ring 802 under the action of attractive force, so as to drive the second spring seat 804 to rotate, the second spring seat 804 drives the second left knob 806 to rotate through the second spring 805, and the second left knob 806 is fixedly connected with the carbon ribbon recovery shaft 3, so as to drive the carbon ribbon recovery shaft 3 to rotate; under the condition that the rotation speed of the recovery shaft is constant, the outer diameter of the belt winding end is increased along with continuous belt winding, at the moment, the linear speed of the carbon belt 15 is increased, in order to prevent the linear speed of the carbon belt 15 from being asynchronous with the paper feeding speed, when the speed of the carbon belt 15 is about to be greater than the paper feeding speed, the second carbon belt gear shaft 801 overcomes the attraction force between the second magnetic ring 802 and the second iron ring 803, so that the second magnetic ring 802 and the second iron ring 803 rotate relatively, the phenomenon that the second carbon belt gear shaft 801 slips and idles is generated, the problem that the linear speed of the carbon belt is asynchronous with the paper feeding speed is further solved, and the carbon belt 15 is in a tensioned state under the action of the second spring 805.

In this embodiment, the release clutch mechanism a (7) and the recovery clutch mechanism B (8) have the same structure and basically the same working principle, except that the first carbon ribbon gear shaft 701 is fixed on the frame 1, and the second carbon ribbon gear shaft 801 is rotatably connected to the frame 1; the first carbon ribbon gear shaft 701 and the second carbon ribbon gear shaft 801 have the same structure, the first magnetic ring 702 and the second magnetic ring 802 have the same structure, and the first iron ring 703 and the second iron ring 803 have the same structure, so that the parts can be used and interchanged.

A first magnetic ring 702, a first iron ring 703, a first spring seat 704, a first spring 705, a carbon ribbon detection label 706 and a first left knob 707 are sequentially sleeved into a first carbon ribbon gear shaft 701, the first magnetic ring 702 is fixed on the first carbon ribbon gear shaft 701 through a slotted hole, the first iron ring 703 is fixed on the first spring seat 704 through a slotted hole, four convex keys 714 are uniformly distributed on the first carbon ribbon gear shaft 701, a central hole of the first magnetic ring 702 is provided with a key slot 715 matched with the convex keys, and the key slot is matched with the convex keys, so that the first magnetic ring 702 cannot rotate on the first carbon ribbon gear shaft 701; the first iron ring 703 is fixed on the first spring seat 704 through a slot, four convex keys are uniformly distributed on the first spring seat 704, a key slot matched with the convex keys is formed in a center hole of the first iron ring 703, the key slot is matched with the convex keys, the first iron ring 703 cannot rotate on the first spring seat 704, and the first spring seat 704 and the first iron ring 703 form a whole which can rotate on the first carbon ribbon gear shaft 701 under the condition that the magnetic attraction force can be overcome.

One end of the inner side of the first spring 705 is fixed in a groove of a first spring seat 704, one end of the outer side of the first spring 705 is fixed in a groove of a first left knob 706, the first spring 705 and a second spring 805 have the same structure, the first spring seat 704 and a second spring seat 804 have the same structure, the first left knob 706 and a second left knob 806 have the same structure, namely, the head end and the tail end of the first spring 705 are both provided with a bending part 713, the bending part comprises a long sheet, a return folding sheet and a vertical connecting sheet which are sequentially connected, the long sheet is parallel to the return folding sheet, the return folding sheet is shorter than the long sheet, the vertical connecting sheet is vertically connected with the return folding sheet, the vertical connecting sheet is connected with the head end and the tail end of the first spring 705, one side of the first spring seat 704 facing the first spring 705 is provided with a first inner convex ring 709, the first inner convex ring is provided with a first inner seam groove 710, the vertical connecting sheet at the inner end of the first spring 705 is clamped, a first outer convex ring 711 is arranged on one side of the first left knob 706 facing the first spring 705, a first outer slot 712 matched with the shape of the bent part is arranged on the first outer convex ring, and the bent part at the outer end of the first spring 705 is clamped in the first outer slot.

A carbon tape detection label 706 is stuck on one side surface of the first left knob 707 facing the first carbon tape gear shaft 701, and the first carbon tape gear shaft 701 prevents the first left knob 707 from falling off by a first hook 708 on the shaft; the first carbon ribbon gear shaft 701 is fixed on the frame 1, and the first spring seat 704 is kept relatively fixed under the attraction of the first magnetic ring 702 and the first iron ring 703. When the carbon ribbon 15 pulls the carbon ribbon release shaft 2 to rotate under the action of the rubber roll shaft 5 and the thermal head (4), the carbon ribbon release shaft 2 further drives the first left knob 707 to drive the first spring 705, after the first spring 705 is tensioned, the carbon ribbon release shaft 2 continues to rotate, the attraction force between the first magnetic ring 702 and the first iron ring 703 is overcome, the first magnetic ring 702 and the first iron ring 703 relatively rotate, the phenomenon of slip and idle rotation occurs, the effect of releasing the carbon ribbon 15 is achieved, and meanwhile, the carbon ribbon 15 is in a tensioned state under the effect of the first spring 705.

In this embodiment, frame 1 is provided with carbon ribbon detection sensor 6 with the mounted position of carbon ribbon release axle 2, be provided with the response window that gets into the abdicating to carbon ribbon detection sensor 6 in the frame 1, the alternate plane of reflection of black and white of surface equipartition of carbon ribbon detection label 706, when carbon ribbon 15 used up, 15 release ends stall of carbon ribbon, and carbon ribbon detection label 706 follows the stall, and in certain time, carbon ribbon detection sensor 6 can not detect the change of carbon ribbon detection label 706 black and white plane of reflection, then judges that carbon ribbon 15 used up. The ribbon detection sensor may be a model GP2S700HCP sensor manufactured by sharp corporation.

In this embodiment, a tape roll shaft 5 is arranged on the frame 1, a paper feeding gear 14 is arranged at the end of the tape roll shaft 5 on the same side as the recovery structure 8, the direction of the tape roll shaft 5 is opposite to that of the carbon tape release shaft 2, a thermal head 4 is arranged above the tape roll shaft 5, a spring 16 is arranged between the upper side surface of the thermal head 4 and the frame 1, the rear part of the thermal head 4 is hinged to the frame 1, the front part of the thermal head 4 presses against the tape roll shaft 5, and a carbon tape 15 is led out from the carbon tape release shaft 2, penetrates through a pressing area between the thermal head 4 and the tape roll shaft 5 and then is led into the carbon tape recovery shaft 3.

In this embodiment, the power assembly of the motor gear assembly includes a motor 17, an output gear 11 is disposed on an output shaft of the motor 17, the output gear 11 is in meshing transmission with a transition gear 12, the transition gear 12 is in meshing transmission with a reduction gear 13, the reduction gear 13 is in meshing transmission with a paper feeding gear 14, and the paper feeding gear 14 is in transmission with a carbon tape gear shaft 801 through a first carbon tape transmission gear 10 and a second carbon tape transmission gear 9 disposed on the rack 1. The paper feeding gear 14 and the rubber roller 5 are coaxially fixed, and the paper feeding gear 14 drives the rubber roller 5 to rotate during operation, so that paper feeding and a carbon ribbon are driven. The thermal transfer printer adopts the carbon ribbon transmission magnetic clutch device.

According to the carbon ribbon transmission magnetic clutch device provided by the invention, the parts of the product used by the carbon ribbon release mechanism 7 and the carbon ribbon recovery mechanism 8 are completely the same, the product is directly sleeved on the rack 1, the number of product parts is saved, the disassembly, assembly and maintenance are convenient, the whole volume of the device is small, the disassembly, assembly and miniaturization of the whole machine are facilitated, the cost is reduced, and the reliability of the device and the practical adaptability of the medium are improved.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.