A carbon ribbon slippage detection structure for a printer

Abstract

The present invention provides a carbon ribbon slippage detection structure of a printer, comprising: a top frame; a carbon ribbon active transmission mechanism; a carbon ribbon driven transmission mechanism; and a detection mechanism. The detection structure is formed with a plurality of ratchets arranged at equal intervals on a turntable, and the ratchets are sequentially formed with a first area, a second area, a third area, and a fourth area, wherein the first area and the third area are respectively through holes and spacing grooves, and both can pass detection light, and the second area and the fourth area block the detection light from passing through. During the printing process, the carbon ribbon is continuously transmitted, and the detection light emitted by the corresponding sensor in the rotation direction of the turntable passes through the first area, the second area, the third area, and the fourth area in sequence, and the time periods fed back are the first time period, the second time period, the third time period, and the fourth time period, respectively. The first time period, the second time period, the third time period, and the fourth time period are compared to determine whether their respective durations are equal, so that it is possible to simply and quickly know whether the carbon ribbon is slippage.

Description

Technical Field

[0001] The invention belongs to the technical field of printers, and in particular relates to a carbon ribbon slippage detection structure of a printer. Background Art

[0002] A printer is an electronic device used to convert data from a computer or other digital device into visible text or images, usually output on paper. Printers are one of the common office automation devices in offices and homes, used to print documents, reports, pictures, etc.

[0003] The detection principle of traditional thermal transfer printers is to use a reflective sensor to detect an equally divided turntable (the turntable is equally divided into black and white). When the detection light hits the turntable, the black part of the turntable absorbs part of the light, and the rest of the light is reflected back to the sensor. When the detection light hits the turntable, the white part of the turntable absorbs part of the light, and the rest of the light is reflected back to the sensor. At this time, the strength of the reflected light is used to determine an equidistant position of the turntable. At this time, in different environments and with different material combinations, the reflected light cannot be equal, and the printer cannot determine an equidistant. In this state, the ribbon slippage cannot be detected, or an alarm cannot be generated when the specified distance is exceeded. In addition, the turntable is equally divided, and the size of the absorbed light and the reflected light spot are different, resulting in inconsistent detection time. When the reflected light spot time is small, it causes time confusion. At this time, the following will occur: 1) The printer cannot determine the ribbon slippage phenomenon 2) The ribbon false alarm 3) At this time, the paper and the ribbon slip, and the starting point of the paper cannot be accurately located, causing the offset of the printing position. Therefore, we propose a new ribbon slippage detection structure to solve the existing detection defects. Summary of the invention

[0004] The object of the present invention is to provide a carbon ribbon slippage detection structure for a printer to solve the problems raised in the above background technology.

[0005] In view of this, the present invention provides a ribbon slippage detection structure for a printer, comprising:

[0006] Top frame;

[0007] The carbon ribbon active transmission mechanism is rotatably arranged on the top frame;

[0008] The carbon ribbon driven transmission mechanism is rotatably arranged on the top frame, a carbon ribbon is arranged inside the top frame, and the carbon ribbon transmission is connected between the carbon ribbon active transmission mechanism and the carbon ribbon driven transmission mechanism;

[0009] A detection mechanism is arranged on the top frame, the detection mechanism includes a through-beam sensor and a turntable, the turntable is fixed on the carbon ribbon driven transmission mechanism and is located outside one side of the top frame, the through-beam sensor is arranged outside the top frame, the through-beam sensor is adjustably arranged outside one side of the top frame and configured with the turntable, one side of the through-beam sensor can generate detection light and the other side can receive the detection light and respond to the detection result, the turntable is formed with a first area, a second area, a third area and a fourth area at equal intervals along its circumference, wherein the first area and the third area are for the detection light generated by the through-beam sensor to pass through and be received and responded to on the other side, the second area and the fourth area can prevent the detection light generated by the through-beam sensor from penetrating the turntable, the detection light generated by the through-beam sensor passes through the first area, the second area, the third area and the fourth area to form a first time period, a second time period, a third time period and a fourth time period respectively, and judge whether the duration of several first time periods is equal, whether the duration of the second time period is equal, whether the duration of the third time period is equal and whether the duration of the fourth time period is equal.

[0010] A further embodiment of the present invention is that the first region and the third region have the same arc length in the annular direction, the second region and the fourth region have the same arc length in the annular direction, and the second region and the fourth region are symmetrically arranged on both sides of the first region.

[0011] A further implementation scheme of the present invention is that the detection mechanism includes a turntable, which is fixed on the carbon belt driven transmission mechanism and located outside one side of the top frame. The turntable rotates at a uniform speed, and the corresponding sensor is arranged outside the top frame and is configured to sense the outer side of the turntable.

[0012] A further embodiment of the present invention is that ratchet teeth are evenly arranged in a circumferential direction on the outer side of the turntable, and the ratchet teeth and adjacent ratchet teeth form a first area, a second area, a third area and a fourth area.

[0013] A further implementation scheme of the present invention is that a through hole is opened on the ratchet tooth, the through hole is oblong, a spacing groove is formed between the ratchet teeth, a first area is formed inside the through hole, a second area and a fourth area are located on both sides of the through hole on the ratchet tooth and are symmetrical about the center line of the through hole, and a third area is formed inside the spacing groove.

[0014] A further embodiment of the present invention is that the angle formed between the center line of the through hole and the center line of the spacing groove along the radial direction of the turntable is 10°.

[0015] A further embodiment of the present invention is that the widths of the through holes and the spacing grooves are equal, both being 1.3 mm.

[0016] A further embodiment of the present invention is that the turntable is a black plastic part.

[0017] A further implementation scheme of the present invention is that a limit hook is further provided on the outer side of the top frame below the turntable, the limit hook is rotatably connected to the top frame, the limit hook includes a hook portion, and the hook portion is hooked with the ratchet in a unidirectional direction.

[0018] A further embodiment of the present invention is that the carbon ribbon driven transmission mechanism also includes an end cover, the end cover is located outside the turntable, and the end cover is connected to the carbon ribbon driven transmission mechanism in a unidirectional rotatable form, a connecting rod is provided on the outside of the top frame, and a spring is connected between the connecting rod and the end cover.

[0019] The beneficial effects of the present invention are:

[0020] The detection structure is implemented by a completely black turntable and a through-beam sensor. The completely black turntable can absorb the emitted detection light but prevent it from passing through. A plurality of ratchets are formed on the turntable at equal intervals, and the first area, the second area, the third area and the fourth area are formed on the ratchets in sequence, wherein the first area and the third area are respectively a through hole and a spacing groove, both of which can pass the detection light, and the second area and the fourth area block the detection light from passing through. During the printing process, the carbon ribbon is continuously transmitted, and the through-beam sensor emits detection light in the rotation direction of the turntable through the first area, the second area, the third area and the fourth area in sequence, and the time periods fed back are the first time period, the second time period, the third time period and the fourth time period, respectively. The first time period, the second time period, the third time period and the fourth time period are compared to determine whether their respective durations are equal, so that it is possible to simply and quickly know whether the carbon ribbon is slipping, and the time node when the slipping occurs can be obtained based on the changes in the time period. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 is a cross-sectional view of the present invention;

[0023] Figure 3 It is one of the front views of the present invention;

[0024] Figure 4 for Figure 3 A magnified schematic diagram of the K position in the middle;

[0025] Figure 5 It is a schematic diagram of the structure of the turntable. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0027] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0029] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0030] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0031] Example 1

[0032] This embodiment provides a ribbon slippage detection structure for a printer, including:

[0033] Top frame 1;

[0034] The carbon ribbon active transmission mechanism 2 is rotatably arranged on the top frame 1;

[0035] The carbon ribbon driven transmission mechanism 3 is rotatably arranged on the top frame 1, and a carbon ribbon is arranged inside the top frame 1. The carbon ribbon transmission is connected between the carbon ribbon active transmission mechanism 2 and the carbon ribbon driven transmission mechanism 3. During the printing process, the carbon ribbon is continuously transmitted, and the carbon ribbon matches the print head and paper to print text and patterns on the paper. After working for a long time, the carbon ribbon may become loose, which will cause slipping. It is necessary to detect and feedback the phenomenon, and make timely adjustments to avoid printing errors.

[0036] Therefore, the detection mechanism is arranged on the top frame 1 , and the detection mechanism includes a through-beam sensor 4 and a turntable 5 .

[0037] Specifically, the turntable 5 is fixed on the carbon ribbon driven transmission mechanism 3 and located outside one side of the top frame 1, the turntable 5 generates uniform rotation, the through-beam sensor 4 is arranged outside the top frame 1 and is configured for sensing the outer side of the turntable 5, the turntable 5 is fixed on the carbon ribbon driven transmission mechanism 3 and located outside one side of the top frame 1, the through-beam sensor 4 is arranged outside the top frame 1, the through-beam sensor 4 is adjustably arranged outside one side of the top frame 1 and configured with the turntable 5, one side of the through-beam sensor 4 can generate detection light and the other side can receive the detection light and respond to the detection result, in order to achieve a better light blocking effect on the detection light so that the detection light does not pass through the turntable 5, preferably, the turntable 5 is a black plastic part, the basic principle is that the through-beam sensor 4 can generate detection light, and when the detection light can pass through the turntable 5, it continues to be received by the through-beam sensor 4, thereby obtaining the inductive feedback, therefore, as long as the turntable 5 rotates, there will be an alternating phenomenon of intermittent light passing, light blocking, light passing, and light blocking.

[0038] In this embodiment, the turntable 5 is formed with a first area A, a second area B, a third area C and a fourth area D at equal intervals along its circumference, the first area A and the third area C have the same arc length in the annular direction, the second area B and the fourth area D have the same arc length in the annular direction, the second area B and the fourth area D are symmetrically arranged on both sides of the first area A, respectively, wherein the first area A and the third area C are allowed to allow the detection light generated by the through-beam sensor 4 to pass through and be received and responded to on the other side, the second area B and the fourth area D can prevent the detection light generated by the through-beam sensor 4 from penetrating the turntable 5, the detection light generated by the through-beam sensor 4 passes through the first area A, the second area B, the third area C and the fourth area D to form a first time period, a second time period, a third time period and a fourth time period respectively, and it is judged whether the duration of several first time periods is equal, whether the duration of the second time period is equal, whether the duration of the third time period is equal and whether the duration of the fourth time period is equal.

[0039] In this embodiment, further, ratchet teeth 50 are evenly arranged in the circumferential direction on the outer side of the turntable 5, and the ratchet teeth 50 and the adjacent ratchet teeth 50 form a first area A, a second area B, a third area C and a fourth area D. A through hole 51 is provided on the ratchet teeth 50, and the through hole 51 is an oblong shape. A spacing groove 52 is formed between the ratchet teeth 50, and the first area A is formed inside the through hole 51. The ratchet teeth 50 are located on both sides of the through hole 51 and are symmetrical about the center line of the through hole 51. The third area C is formed inside the spacing groove 52. The angle formed between the center line of the through hole 51 and the center line of the spacing groove 52 along the radial direction of the turntable 5 is 10°, and the widths of the through hole 51 and the spacing groove 52 are equal, both of which are 1.3 mm. Therefore, when the turntable 5 rotates, different time periods corresponding to light transmission and light blocking appear in sequence.

[0040] Therefore, the detection structure is implemented by a completely black turntable 5 and a corresponding radiation sensor 4. The completely black turntable 5 can absorb the emitted detection light but prevent it from passing through. A plurality of ratchet teeth 50 are formed on the turntable 5 at equal intervals, and a first area A, a second area B, a third area C and a fourth area D are formed on the ratchet teeth 50 in sequence, wherein the first area A and the third area C are respectively a through hole 51 and a spacing groove 52, both of which can pass the detection light, and the second area B and the fourth area D block the detection light from passing through. During the printing process, the carbon ribbon is continuously transmitted, and the corresponding radiation sensor 4 emits detection light in the rotation direction of the turntable 5 and passes through the first area A, the second area B, the third area C and the fourth area D in sequence, and the time periods fed back are the first time period, the second time period, the third time period and the fourth time period respectively. By comparing and judging whether the respective durations of the first time period, the second time period, the third time period and the fourth time period are equal, it is possible to simply and quickly know whether the carbon ribbon is slipping, and the time node of the slippage can be obtained according to the change of the time period.

[0041] Example 2

[0042] This embodiment provides a ribbon slippage detection structure for a printer, including:

[0043] Top frame 1;

[0044] The carbon ribbon active transmission mechanism 2 is rotatably arranged on the top frame 1;

[0045] The carbon ribbon driven transmission mechanism 3 is rotatably arranged on the top frame 1, and a carbon ribbon is arranged inside the top frame 1. The carbon ribbon transmission is connected between the carbon ribbon active transmission mechanism 2 and the carbon ribbon driven transmission mechanism 3. During the printing process, the carbon ribbon is continuously transmitted, and the carbon ribbon matches the print head and paper to print text and patterns on the paper. After working for a long time, the carbon ribbon may become loose, which will cause slipping. It is necessary to detect and feedback the phenomenon, and make timely adjustments to avoid printing errors.

[0046] Therefore, the detection mechanism is arranged on the top frame 1 , and the detection mechanism includes a through-beam sensor 4 and a turntable 5 .

[0047] Specifically, the turntable 5 is fixed on the carbon ribbon driven transmission mechanism 3 and located outside one side of the top frame 1, the turntable 5 generates uniform rotation, the through-beam sensor 4 is arranged outside the top frame 1 and is configured for sensing the outer side of the turntable 5, the turntable 5 is fixed on the carbon ribbon driven transmission mechanism 3 and located outside one side of the top frame 1, the through-beam sensor 4 is arranged outside the top frame 1, the through-beam sensor 4 is adjustably arranged outside one side of the top frame 1 and configured with the turntable 5, one side of the through-beam sensor 4 can generate detection light and the other side can receive the detection light and respond to the detection result, in order to achieve a better light blocking effect on the detection light so that the detection light does not pass through the turntable 5, preferably, the turntable 5 is a black plastic part, the basic principle is that the through-beam sensor 4 can generate detection light, and when the detection light can pass through the turntable 5, it continues to be received by the through-beam sensor 4, thereby obtaining the inductive feedback, therefore, as long as the turntable 5 rotates, there will be an alternating phenomenon of intermittent light passing, light blocking, light passing, and light blocking.

[0048] In this embodiment, the turntable 5 is formed with a first area A, a second area B, a third area C and a fourth area D at equal intervals along its circumference, the first area A and the third area C have the same arc length in the annular direction, the second area B and the fourth area D have the same arc length in the annular direction, the second area B and the fourth area D are symmetrically arranged on both sides of the first area A, respectively, wherein the first area A and the third area C are allowed to allow the detection light generated by the through-beam sensor 4 to pass through and be received and responded to on the other side, the second area B and the fourth area D can prevent the detection light generated by the through-beam sensor 4 from penetrating the turntable 5, the detection light generated by the through-beam sensor 4 passes through the first area A, the second area B, the third area C and the fourth area D to form a first time period, a second time period, a third time period and a fourth time period respectively, and it is judged whether the duration of several first time periods is equal, whether the duration of the second time period is equal, whether the duration of the third time period is equal and whether the duration of the fourth time period is equal.

[0049] In this embodiment, further, ratchet teeth 50 are evenly arranged in the circumferential direction on the outer side of the turntable 5, and the ratchet teeth 50 and the adjacent ratchet teeth 50 form a first area A, a second area B, a third area C and a fourth area D. A through hole 51 is provided on the ratchet teeth 50, and the through hole 51 is an oblong shape. A spacing groove 52 is formed between the ratchet teeth 50, and the first area A is formed inside the through hole 51. The ratchet teeth 50 are located on both sides of the through hole 51 and are symmetrical about the center line of the through hole 51. The third area C is formed inside the spacing groove 52. The angle formed between the center line of the through hole 51 and the center line of the spacing groove 52 along the radial direction of the turntable 5 is 10°, and the widths of the through hole 51 and the spacing groove 52 are equal, both of which are 1.3 mm. Therefore, when the turntable 5 rotates, different time periods corresponding to light transmission and light blocking appear in sequence.

[0050] Therefore, the detection structure is implemented by a completely black turntable 5 and a corresponding radiation sensor 4. The completely black turntable 5 can absorb the emitted detection light but prevent it from passing through. A plurality of ratchet teeth 50 are formed on the turntable 5 at equal intervals, and a first area A, a second area B, a third area C and a fourth area D are formed on the ratchet teeth 50 in sequence, wherein the first area A and the third area C are respectively a through hole 51 and a spacing groove 52, both of which can pass the detection light, and the second area B and the fourth area D block the detection light from passing through. During the printing process, the carbon ribbon is continuously transmitted, and the corresponding radiation sensor 4 emits detection light in the rotation direction of the turntable 5 and passes through the first area A, the second area B, the third area C and the fourth area D in sequence, and the time periods fed back are the first time period, the second time period, the third time period and the fourth time period respectively. By comparing and judging whether the respective durations of the first time period, the second time period, the third time period and the fourth time period are equal, it is possible to simply and quickly know whether the carbon ribbon is slipping, and the time node of the slippage can be obtained according to the change of the time period.

[0051] In this embodiment, in order to better prevent the turntable 5 from rotating in the opposite direction, a limit hook 6 is further provided on the outer side of the top frame 1 below the turntable 5. The limit hook 6 is rotatably connected to the top frame 1. The limit hook 6 includes a hook portion 60. The hook portion 60 is hooked with the ratchet 50 in a unidirectional direction, similar to the structure of a bicycle ratchet. The turntable 5 can only rotate in a specified unidirectional direction. The limit hook 6 blocks the ratchet 50 from rotating in the opposite direction, thereby preventing the carbon ribbon from loosening.

[0052] Example 3

[0053] In this embodiment, the carbon ribbon driven transmission mechanism also includes an end cover 7, and the end cover 7 is located on the outside of the turntable 5, and the end cover 7 is connected to the carbon ribbon driven transmission mechanism 3 in a unidirectional rotatable form. A connecting rod 8 is provided on the outside of the top frame 1, and a spring 9 is connected between the connecting rod 8 and the end cover 7. During the rotation process, there can only be a unidirectional trend between the end cover 7 and the carbon ribbon driven transmission mechanism 3 in the same direction as the rotation of the turntable 5. If there is a trend of the carbon ribbon driven transmission mechanism 3 to rotate in the opposite direction, the end cover 7 will first directly clamp the carbon ribbon driven transmission mechanism 3 to limit the reverse movement. At the same time, the spring 9 plays a certain buffering role to comprehensively prevent the carbon ribbon from slipping.

[0054] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A ribbon slippage detection structure for a printer, characterized in that: include: Top frame; The carbon ribbon active transmission mechanism is rotatably arranged on the top frame; The carbon ribbon driven transmission mechanism is rotatably arranged on the top frame, a carbon ribbon is arranged inside the top frame, and the carbon ribbon transmission is connected between the carbon ribbon active transmission mechanism and the carbon ribbon driven transmission mechanism; A detection mechanism is arranged on the top frame, the detection mechanism includes a through-beam sensor and a turntable, the turntable is fixed on the carbon ribbon driven transmission mechanism and is located outside one side of the top frame, the through-beam sensor is arranged outside the top frame, the through-beam sensor is adjustably arranged outside one side of the top frame and configured with the turntable, one side of the through-beam sensor can generate detection light and the other side can receive the detection light and respond to the detection result, the turntable is formed with a first area, a second area, a third area and a fourth area at equal intervals along its circumference, wherein the first area and the third area can allow the detection light generated by the through-beam sensor to pass through and be received and responded to on the other side, the second area and the fourth area can prevent the detection light generated by the through-beam sensor from penetrating the turntable, the detection light generated by the through-beam sensor passes through the first area, the second area, the third area and the fourth area to form a first time period, a second time period, a third time period and a fourth time period respectively, and judge whether the duration of several first time periods is equal, whether the duration of the second time period is equal, whether the duration of the third time period is equal and whether the duration of the fourth time period is equal; The first area and the third area have the same arc length in the annular direction, the second area and the fourth area have the same arc length in the annular direction, and the second area and the fourth area are symmetrical on both sides of the first area; The detection mechanism includes a turntable, which is fixed on the carbon belt driven transmission mechanism and located outside one side of the top frame. The turntable rotates at a constant speed, and the beam sensor is arranged outside the top frame and is inductively configured with the outer side of the turntable. Ratchet teeth are evenly arranged in a circumferential direction on the outer side of the rotating disk, and the ratchet teeth and adjacent ratchet teeth form a first area, a second area, a third area and a fourth area; The ratchet teeth are provided with through holes, which are oblong in shape, and spacing grooves are formed between the ratchet teeth. A first area is formed inside the through holes. The ratchet teeth are provided with second and fourth areas symmetrical about the midline of the through holes on both sides of the through holes, and a third area is formed inside the spacing grooves. The turntable is a black plastic part.

2. The ribbon slippage detection structure of a printer according to claim 1, characterized in that: The angle formed between the center line of the through hole and the center line of the spacing groove along the radial direction of the rotating disk is 10°.

3. The ribbon slippage detection structure of a printer according to claim 2, characterized in that: The widths of the through holes and the spacing grooves are equal, both being 1.3 mm.

4. The ribbon slippage detection structure of a printer according to claim 3, characterized in that: A limit hook is also provided on the outer side of the top frame below the rotating disk. The limit hook is rotatably connected to the top frame. The limit hook includes a hook portion, and the hook portion is hooked with the ratchet in a unidirectional direction.

5. The ribbon slippage detection structure of a printer according to claim 4, characterized in that: The carbon ribbon driven transmission mechanism also includes an end cover, which is located outside the turntable and connected to the carbon ribbon driven transmission mechanism in a unidirectional rotatable manner. A connecting rod is provided outside the top frame, and a spring is connected between the connecting rod and the end cover.

Images