TWI555678B - Roller device and label printer with the same - Google Patents

Description

Roller device and label printer having the same

The present invention relates to a roller device and a label printer having the same, and more particularly to a roller device which can easily remove a waste carbon ribbon with a single hand and a label printer having a roller device.

The label printer is a printing device that can quickly print a lot of self-adhesive labels, tags, etc. The label printer has a built-in font, font file and a considerable number of built-in keyboards without having to be connected to a computer. The label template, through the LCD screen of the fuselage, can directly print, label, and print directly according to the needs of the label content, and is widely used in all aspects of life.

The ribbon printer with the ribbon will produce a waste ribbon after printing. For the purpose of printing quality and easy recycling, the waste ribbon needs to be wrapped with a roller-shaped recycling device to facilitate recycling. However, as more and more waste carbon ribbons are wound around the recycling drum, the waste carbon ribbon will tightly wrap the drum, which makes it difficult for the user to remove the waste carbon ribbon from the recycling device, which requires a large expenditure. The strength can be dismantled, causing inconvenience and trouble to the user.

Therefore, it is necessary to design a new roller device and a label printer having a roller device to overcome the above drawbacks.

It is an object of the present invention to provide a roller device and a label printer having the same, which can be easily removed by a user with one hand, which is convenient for the user to use.

In order to achieve the above object, the present invention provides a roller device for cooperating with a reel, the inner hole of the reel being sleeved on the roller device, the roller device comprising: a rotating shaft having an axial direction One end and a second end, the reel can be removed from the second end; the fixing member is fixed to the rotating shaft, the fixing member has a guiding portion, the guiding portion has a guiding surface, and the guiding surface is inclined along the axial direction of the rotating shaft a slope having a high point and a low point, the lower point of the high point being adjacent to the first end; and the first telescopic plate being movably coupled to the fixing member, the first telescopic plate having an outer surface and an inner surface corresponding to the outer surface The outer surface is adapted to cooperate with the inner hole of the reel, and the inner surface has a first protrusion, the first protrusion is configured to cooperate with the guiding surface and slide along the guiding surface; wherein, when being sleeved on the roller device When the reel is applied with the force in the first direction, the reel applies a frictional force in the first direction to the first telescopic plate, and the first telescopic plate moves along the guiding surface in the first direction due to the frictional force, so that The roller device changes from the first state to the second state. In the first state, the first protrusion cooperates with the high point of the guiding surface, and the distance between the first telescopic plate and the rotating shaft is the first distance, and the first telescopic The plate abuts the inner hole of the top reel, in the second state, the first protrusion and the guiding surface The distance between the first telescopic plate and the rotating shaft is a second distance, and the first telescopic plate has a first gap with the inner hole of the reel, wherein the first spacing is greater than the second spacing, and the first direction is The direction from the first end to the second end.

Preferably, the roller device further includes a drum, the roller sleeve is sleeved on the rotating shaft and covers the fixing member, and the roller is provided with an opening, and the first telescopic plate is disposed at the opening, and when the first telescopic plate moves along the axial direction of the rotating shaft, the roller is It is moved in the axial direction by the movement of the first telescopic plate by the abutment of the first telescopic plate.

Preferably, the drum has a first outer edge, and in the second state, the outer surface of the first telescopic plate is flush with the first outer edge, and the outer surface of the first telescopic plate protrudes first when the roller device is in the first state. Outer edge.

Preferably, the roller device further includes a first elastic member having a first fixed end and a first free end, the first fixed end being connected to the fixing member, the first free end being connected to the drum, and the first free end being The first fixed end is adjacent to the second end of the rotating shaft, the elastic force direction of the first elastic member is the axial direction of the rotating shaft, and when in the second state, the first elastic member is in the stretched state, when the first elastic plate is subjected to the friction When the force disappears, the first elastic element is reset, and as the first elastic element is re-determined, the drum device transitions from the second state to the first state.

Preferably, the roller device further comprises a second elastic element, the second elastic element and the first elastic The structural elements are identical in structure, and the first elastic element and the second elastic element are uniformly or symmetrically distributed along the axis of the rotating shaft.

Preferably, the inner surface has a pair of hooks, and the pair of hooks are symmetrically located on opposite sides of the first protrusion for engaging with the guiding portion, each of the hooks includes a first limiting portion and a first limiting position a second limiting portion that protrudes toward the first protrusion.

Preferably, the guiding portion further has a first surface and a second surface, the first surface and the second surface are adjacent, the first surface is matched with the first limiting portion and has a second gap, the second surface and the second limit The bits cooperate and have a third gap.

Preferably, the first telescopic plate further includes a second protrusion, the second protrusion and the first protrusion structure are the same, and the first protrusion and the second protrusion are distributed along the axial direction of the rotation shaft.

Preferably, the fixing member further has a supporting portion, the first telescopic plate further includes a third protrusion, and the third protrusion is located on the same line as the first protrusion and the second protrusion, and the third protrusion is used for supporting In cooperation, when the roller device is in the first state, the third protrusion abuts against the support portion.

Preferably, the fixing member has a first fixing member and a second fixing member, and the rotating shaft has a third outer edge, and the first fixing member and the second fixing member are fixedly fixed to be sleeved on the third outer edge.

To achieve the above object, the present invention also provides a label printer comprising a transmission mechanism and the above-described roller device, wherein the first end of the rotating shaft of the roller device is fixedly coupled to the transmission mechanism to cause the transmission mechanism to drive the roller device.

Compared with the prior art, the present invention provides a roller device for cooperating with a reel, wherein an inner hole of the reel is sleeved on the roller device, and the reel device includes a rotating shaft, a fixing member and a first telescopic plate, and is fixed. The piece has a guiding portion, the guiding portion has a guiding surface, the guiding surface is a slope inclined along the axial direction of the rotating shaft, the guiding surface has a high point and a low point, and the lower point of the high point is adjacent to the first end, the first telescopic The plate is movably connected to the fixing member, the first telescopic plate has an outer surface and an inner surface corresponding to the outer surface, the outer surface is adapted to cooperate with the inner hole of the reel, the inner surface has a first protrusion, and the first protrusion is used for Cooperating with the guiding surface and sliding along the guiding surface, when the user uses the waste carbon ribbon on the single-hand roller device, the first elastic plate can be guided along the friction of the inner hole of the waste carbon ribbon. Surface movement, during the movement The distance between the telescopic plate and the rotating shaft is reduced, so that there is a gap between the inner hole of the waste carbon ribbon and the first flexible plate, so that the user can take off the waste carbon ribbon; and the guiding surface of the present invention is a sloped surface, and the user Only by overcoming the friction between the telescopic plate and the guiding surface, the first protrusion of the telescopic plate can be slid along the inclined surface, and the relative position of the telescopic plate and the fixing member can be generated in comparison with the prior art to overcome the blocking force. Moving, the user only needs to provide a small force, for example, with one hand, the reel can be easily removed from the roller device of the present invention, and the telescopic plate is easily reset after sliding against the guide surface.

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

001‧‧‧Roller

002‧‧‧ label printer

1‧‧‧ shaft

2‧‧‧Fixed parts

3‧‧‧First expansion board

4‧‧‧Roller

5‧‧‧First elastic element

6‧‧‧Second elastic element

7‧‧‧Second expansion plate

8‧‧‧Transmission mechanism

11‧‧‧ first end

12‧‧‧ second end

13‧‧‧ third outer edge

21‧‧‧ Guidance Department

22‧‧‧First fixture

23‧‧‧Second fixture

24‧‧‧ fixed board

25‧‧‧ first shell

26‧‧‧Second outer casing

27‧‧‧ first side

28‧‧‧ second side

29‧‧‧Support

31‧‧‧ outer surface

32‧‧‧ inner surface

41‧‧‧ openings

42‧‧‧First outer edge

51‧‧‧First fixed end

52‧‧‧First free end

211‧‧‧ Guide surface

212‧‧‧ first surface

213‧‧‧ second surface

321‧‧‧First bulge

322‧‧‧ card hook

323‧‧‧second bulge

324‧‧‧3rd bulge

2111‧‧‧High

2112‧‧‧ low

3221‧‧‧First Limitation

3222‧‧‧Second Limitation

F‧‧‧First direction

H1‧‧‧first distance

H2‧‧‧Second distance

FIG. 1 is a schematic structural view of a roller device according to an embodiment of the present invention in a first state.

Fig. 2 is a schematic cross-sectional view taken along line A-A of the drum unit shown in Fig. 1.

Figure 3 is a cross-sectional view along the line A-A of the fixing device of the roller device shown in Figure 1.

Fig. 4 is a schematic view showing the structure of a fixing member of the drum unit shown in Fig. 1.

Fig. 5 is a schematic structural view of the first telescopic plate shown in Fig. 1.

Figure 6 is a schematic view showing the structure of the roller device in the second state according to the embodiment of the present invention.

Figure 7 is a cross-sectional view of the drum unit of Figure 6 taken along line B-B.

Figure 8 is a schematic view showing the structure of the roller device in the first state in the first state according to the embodiment of the present invention.

Figure 9 is a cross-sectional view of the roller unit of Figure 8 taken along line C-C.

FIG. 10 is a schematic structural view of the roller device in another direction when the roller device is in the second state according to an embodiment of the present invention.

Figure 11 is a cross-sectional view of the roller unit of Figure 10 taken along line D-D.

Figure 12 is a cross-sectional view showing a roller device according to another embodiment of the present invention.

Figure 13 is a partial structural schematic view of a label printer according to an embodiment of the present invention.

In order to further understand the objects, structures, features, and functions of the present invention, the embodiments are described in detail below.

Referring to FIGS. 1 to 12, a schematic structural view of a roller device 001 of the present invention is disclosed. The roller device 001 includes a rotating shaft 1, a fixing member 2, and a first telescopic plate 3. The roller device 001 is configured to cooperate with a reel (not shown), and the inner hole of the reel is sleeved on the roller device 001, and the reel can be, for example, a waste carbon ribbon or a paper roll of the label printer. The fixing member 2 is fixed to the rotating shaft 1, and the fixing member 2 has a guiding portion 21 having a guiding surface 211. The guiding surface 211 is a slope inclined along the axial direction of the rotating shaft 1, and the guiding surface 211 has a high height. Point 2111 and low point 2112, high point 2111 lower point 2112 adjacent to first end 11. The first telescopic plate 3 is movably connected to the fixing member 2, and the first telescopic plate 3 has a first protrusion 321. When the reel sleeved on the roller device 001 is applied with a force in the first direction F, the reel pair The first telescopic plate 3 applies a frictional force in the first direction F, and the first telescopic plate 3 is moved toward the first direction F along the guiding surface 211 by the frictional force, so that the roller device 001 is changed from the first state to the second state. In the first state, the first protrusion 321 cooperates with the high point 2111 of the guiding surface 211, and the distance between the outer surface of the first telescopic plate 3 and the third outer edge 13 of the rotating shaft 1 is the first distance. H1, the first telescopic plate 3 abuts the inner hole of the top reel, and in the second state, the first protrusion 321 cooperates with the low point 2112 of the guiding surface 211, and the outer surface of the first telescopic plate 3 and the outer shaft 1 The distance between the third outer edges 13 is the second distance H2, so that the outer contour of the roller device 001 becomes smaller, that is, the first elastic plate 3 has a first gap with the inner hole of the reel, wherein the first distance H1 is greater than the second distance H2, and the first direction F is a direction in which the first end 11 of the rotating shaft 1 is directed to the second end 12 of the rotating shaft 1. The respective components and the fitting of the roller device 001 of the present invention will be specifically described below.

1 and 2, FIG. 1 is a schematic structural view of a roller device according to an embodiment of the present invention in a first state, and FIG. 2 is a cross-sectional view of the roller device shown in FIG. 1 taken along line A-A. As shown in FIGS. 1 and 2, the rotating shaft 1 has a first end 11 and a second end 12 in the axial direction, and the reel is removed from the second end 12, and the first end 11 is fixedly mounted to the external component. For example, on the transmission mechanism, the rolling device 001 is rotated by the rotation of the external member.

Please continue to refer to Figure 3, which is the fixture along the roller unit shown in Figure 1. Schematic diagram of the A-A profile. 2 and 3, the fixing member 2 is fixed to the rotating shaft 1 so that the fixing member 2 can be rotated by the rotation of the rotating shaft 1, and the fixing member 2 has the guiding portion 21, and the guiding portion 21 has a guide. The guiding surface 211 is a inclined surface inclined along the axial direction of the rotating shaft 1. The guiding surface 211 has a high point 2111 and a low point 2112, and a high point 2111 lower point 2112 is adjacent to the first end 11. Preferably, the guiding portion 21 is a channel structure. For the convenience of assembly, the fixing member 2 can also be designed as a component. As shown in FIG. 4, the fixing member 2 includes a first fixing member 22 and a second fixing member 23, and the rotating shaft 1 has a third outer edge 13 (as shown in FIG. 2). The first fixing member 22 is fixedly coupled to the second fixing member 23 to be sleeved on the third outer edge 13, but is not limited thereto.

Please also refer to FIG. 5, which is a schematic structural view of the first flexible plate shown in FIG. 1. As shown in FIGS. 2 to 5, the first telescopic plate 3 is movably coupled to the fixing member 2, and the first telescopic plate 3 has an outer surface 31 and an inner surface 32 opposite to the outer surface 31. The inner hole 32 of the reel has a first protrusion 321 for engaging with the guiding surface 211 and sliding along the guiding surface 211. In this embodiment, the outer surface 31 is a curved surface corresponding to the shape of the roller device 001. Of course, the design of the outer surface 31 is designed by those skilled in the art according to actual needs, and is not limited thereto.

In addition, the first to seventh figures can be further combined, and the cooperation of the rotating shaft 1, the fixing member 2 and the first telescopic plate 3 can be more clearly understood. When the first protrusion 321 is engaged with the high point 2111 of the guiding surface 211, the roller device 001 is in the first state, and in the first state, the outer surface of the first telescopic plate 3 and the third outer edge 13 of the rotating shaft 1 The distance between the two is a first distance H1, and the first telescopic plate 3 abuts against the inner hole of the top reel to apply a force to the inner hole of the reel to prevent the reel from slipping during the rotation process (as shown in Fig. 1). And FIG. 2); when applying a force in a first direction F (as shown in FIGS. 6 and 7) to a reel set on the roller device 001, the reel is attached to the first retractable plate 3 Applying the frictional force in the first direction F, the first telescopic plate 3 is moved along the guiding surface 211 in the first direction F by the frictional force, so that the roller device 001 is changed from the first state to the second state, and the second In the state, the distance between the outer surface of the first telescopic plate 3 and the third outer edge 13 of the rotating shaft 1 is the second distance H2, that is, the outer contour of the roller device 001 is reduced, the first telescopic plate 3 and the reel Between the inner holes There is a first gap to facilitate removal of the reel from the second end 12 (as shown in Figures 6 and 7). The first distance H1 is greater than the second distance H2, and the first direction F is a direction from the first end 11 to the second end 12. The first gap is smaller than the first predetermined value, and the size of the first predetermined value is determined by the designer according to actual conditions. For example, the first preset value may be 0.05-0.2 mm. Preferably, the second end 12 has a positioning portion to prevent the first telescopic plate 3 from being detached from the second end 12 from the fixing member 2, wherein the positioning portion may be a convex portion, but not limited thereto.

Preferably, as shown in FIG. 5, the inner surface 32 of the first flexible plate 3 has a pair of hooks 322, and a pair of hooks 322 are symmetrically located on opposite sides of the first protrusions 321 for being opposite to the guiding portion 21. Each of the hooks 322 includes a first limiting portion 3221 and a second limiting portion 3222 extending from the first limiting portion 3221 to the first protrusion 321 . As shown in FIG. 3, the guiding portion 21 further has a first surface 212 and a second surface 213, and the first surface 212 and the second surface 213 are adjacent to each other, wherein the first surface 212 is matched with the first limiting portion 3221 And having a second gap, the second surface 213 is matched with the second limiting portion 3222 and has a third gap to define that the first protrusion 321 slides along the guiding surface 211 to prevent the first protrusion of the first telescopic plate 3 When the guiding surface 211 of the 321 detaching guide portion 21 is slid on the guiding surface 211, an offset occurs, and it is ensured that the first protrusion 321 can freely slide along the guiding surface 211. The second gap and the third gap are respectively smaller than the second predetermined value and the third predetermined value, and the magnitudes of the second predetermined value and the third predetermined value are determined by the designer according to actual conditions.

In the above embodiment of the present invention, as shown in FIG. 1, FIG. 2, FIG. 6, and FIG. 7, the roller device 001 further includes a drum 4 which is sleeved on the rotating shaft 1 and covers the fixing member 2, and the roller 4 is provided with an opening 41, the first telescopic plate 3 is disposed at the opening 41, and is freely movable at the opening 41. When the first telescopic plate 3 is axially moved along the rotating shaft 1, the roller 4 is subjected to the first telescopic plate 3 The abutment moves axially as the first telescopic plate 3 moves. That is, when the roller unit 001 is changed from the first state to the second state, the first telescopic plate 3 has both an axial movement and a direction perpendicular to the axial direction, and the drum 4 is only moved in the axial direction. Further, the drum 4 has a first outer edge 42 for cooperating with the reel. When the roller device 001 is in the second state, the outer surface 31 of the first retractable plate 3 is flush with the first outer edge 42, and the roller device 001 In the first state, outside the first expansion panel 3 The surface 31 protrudes from the first outer edge 42 and can be designed by a person skilled in the art as needed, and is not limited thereto. Of course, the drum 4 and the fixing member 2 may also be integrally formed, but not limited thereto.

Preferably, as shown in FIGS. 8 to 11, the roller device 001 further includes a first elastic member 5 having a first fixed end 51 and a first free end 52, the first fixed end 51 and fixed The second free end 52 is connected to the drum 4, the elastic force direction of the first elastic member 5 is the axial direction of the rotating shaft 1, and the first free end 52 is closer to the second end 12 of the rotating shaft than the first fixed end 52. When the roller device 001 is in the second state, the first elastic member 5 is in a stretched state (please refer to FIGS. 8 and 9), and when the frictional force received by the first elastic plate 3 disappears, the first elasticity The element 5 is reset. As the first elastic element 5 is re-set, the drum 4 is reset, and the first telescopic plate 3 is also reset by the abutment of the drum 4, that is, the first protrusion 321 is matched with the high point 2111, that is, the roller device. 001 transitions from the second state to the first state (see Figures 10 and 11). Further, the roller device 001 further includes a second elastic member 6, the second elastic member 6 is identical in structure to the first elastic member 5, and the first elastic member 5 and the second elastic member 6 are uniformly or symmetrically distributed along the axis of the rotating shaft 1. In order to make the roller 4 evenly stressed.

In another embodiment of the present invention, the roller device 001 may not have the drum 4, and the fixing member 2 has a second outer edge for cooperating with the reel. When the roller device 001 is in the second state, the first retractable plate 3 The outer surface 31 is flush with the second outer edge, and when the roller device 001 is in the first state, the outer surface 31 protrudes from the second outer edge. Further, the first outer edge is provided with an accommodating space, and the first elastic plate 3 is located in the accommodating space, and at least a part of the first elastic plate 3 is disposed in the accommodating space. Preferably, the roller device 001 further includes a third elastic member having a second fixed end and a second free end, the second fixed end being connected to the fixing member 2, and the second free end being connected to the first telescopic plate 3, The elastic force direction of the second elastic member is the axial direction of the rotating shaft 1, and the second free end is closer to the second end 12 of the rotating shaft than the second fixed end. When the roller device 001 is in the second state, the second elastic member is pulled. In the extended state, when the frictional force received by the first telescopic plate 3 disappears, the third elastic member is reset, and as the third elastic member is re-determined, the roller device 001 is changed from the second state to the first state.

In practical applications, as shown in FIG. 12, the fixing member 2 can also be designed in the following form: The fixing member 2 includes a fixing plate 24, a first outer casing 25 and a second outer casing 26. The fixing plate 24 is sleeved on the rotating shaft 1, and the first elastic plates 3 are respectively disposed on the first side 27 and the second side 28 of the fixing member 2. The first side 27 and the second side 28 are opposite to each other, and the first outer casing 25 and the second outer casing 26 are connected to the fixing plate 24, and the same effects as those of the above embodiment can be achieved, and can be designed according to actual needs by those skilled in the art, and Not limited to this.

In a practical application, as shown in FIG. 5, the first flexible plate 3 further includes a second protrusion 323, and the first protrusion 321 and the second protrusion 323 have the same structure, and the first protrusion 321 and the second protrusion The 323 is distributed along the axial direction of the rotating shaft 1 so that the first telescopic plate 3 sufficiently abuts against the inner hole of the top reel to prevent the reel from slipping during the rotation. Further, the first telescopic plate 3 further includes a third protrusion 324, and the third protrusion 324 is located on the same line as the first protrusion 321 and the second protrusion 323, and the fixing member 2 further has a supporting portion 29 ( Referring to FIGS. 3 and 4), the third protrusion 324 is adapted to cooperate with the support portion 29, and when the roller device 001 is in the first state, the third protrusion 324 abuts against the support portion 29 to The abutting force of the first telescopic plate 3 on the inner hole of the reel is enhanced to further prevent the reel from slipping during the rotation. Wherein, the two sides of the third protrusion 324 need not be provided with the hook 322, because the third protrusion 324 does not need to cooperate with the corresponding guiding portion 21, and when the roller device 001 is in the second state, the third protrusion 324 does not Cooperating with the support portion 29. Of course, the support portion 29 can also be designed as the structure of the guiding portion 21, and the hooks 322 are required to be disposed on the two sides of the corresponding third protrusions 324 to cooperate with the guiding portion 21, which can be practically determined by those skilled in the art. Design is required and is not limited to this.

In practical applications, as shown in FIG. 1 and FIG. 2, the roller device 001 further includes a second telescopic plate 7 having the same structure as the first telescopic plate 3, and the first telescopic plate 3 and the second The telescopic plates 7 are evenly or symmetrically distributed along the axis of the rotating shaft 1, so that the inner hole of the reel is evenly stressed, so that the reel is not eccentric from the axial force, further preventing the reel from slipping during the rotation. The phenomenon. In this embodiment, a first line between the first elastic member 5 and the second elastic member 6 perpendicular to the rotating shaft 1 and a second line between the first and second telescopic plates 3 and 7 perpendicular to the rotating shaft 1 The connecting line is vertical, that is, the first elastic member 5, the first elastic plate 3, and the second elastic member 6 And the second telescopic plates 7 are sequentially spaced along the circumference of the outer edge of the rotating shaft 1 so as to be evenly stressed, but not limited thereto.

In summary, the present invention provides a roller device for cooperating with a reel, wherein an inner hole of the reel is sleeved on the roller device, and the reel device includes a rotating shaft, a fixing member and a first telescopic plate, and the rotating shaft has an axis along the shaft To the first end and the second end, the reel is removed from the second end, the fixing member is fixed to the rotating shaft, the fixing member has a guiding portion, the guiding portion has a guiding surface, and the guiding surface is an axial direction along the rotating shaft The inclined slope has a high point and a low point, the lower point of the high point is adjacent to the first end, and the first expansion plate is movably connected with the fixing member, and the first expansion plate has an outer surface and an inner surface corresponding to the outer surface The outer surface is adapted to cooperate with the inner hole of the reel, and the inner surface has a first protrusion, the first protrusion is configured to cooperate with the guiding surface and slide along the guiding surface, wherein when being sleeved on the roller device When the reel is applied with the force in the first direction, the reel applies a frictional force in the first direction to the first telescopic plate, and the first telescopic plate moves along the guiding surface in the first direction due to the frictional force, so that The roller device changes from the first state to the second state, in the first state The first protrusion cooperates with the high point of the guiding surface, the distance between the first telescopic plate and the rotating shaft is a first distance, and the first telescopic plate abuts the inner hole of the top reel, that is, a force is applied to the roller The inner hole of the device effectively avoids the phenomenon that the reel slips during the rotation; in the second state, the first protrusion cooperates with the low point of the guiding surface, and the distance between the first telescopic plate and the rotating shaft is the same The two distances, wherein the first spacing is greater than the second spacing, the first gap between the first telescopic plate and the inner hole of the reel has a first gap, that is, the outer contour of the roller device is deformed to facilitate disassembly of the roller device. Compared with the prior art, the guiding surface of the present invention is a beveled surface, and the user only needs to overcome the friction between the telescopic plate and the guiding surface to slide the first protrusion of the telescopic plate along the inclined surface, compared with the prior art. In order to overcome the blocking force, the relative position of the telescopic plate and the fixing member can be moved, and the user can provide a small force, for example, using a single hand, the reel can be easily removed from the roller device of the present invention. Moreover, the expansion plate is also easy to reset after sliding relative to the guide surface.

In practical applications, the roller device 001 shown in Figs. 1 to 12 of the present invention can be applied to a label printer. As shown in Fig. 13, a schematic diagram of the structure of the label printer 002 is disclosed. The label printer 002 includes the transmission mechanism 8 and the roller device 001 of the above embodiment, wherein the roller The first end 11 of the shaft 1 of the device 001 is fixedly coupled to the transmission mechanism 8 to cause the transmission mechanism 8 to drive the roller unit 001. The structure and the operation principle of the roller device 001 can be described with reference to FIGS. 1 to 12 and the above embodiments, and details are not described herein again. Therefore, when the reel set on the roller device 001 is applied with the force of the first direction F, the reel applies a frictional force in the first direction F to the first telescopic plate 3, and the first telescopic plate 3 is subjected to friction. The force moves along the guiding surface 211 toward the first direction F, so that the roller device 001 changes from the first state to the second state. In the first state, the first protrusion 321 is opposite to the high point 2111 of the guiding surface 211. The distance between the outer surface of the first telescopic plate 3 and the third outer edge 13 of the rotating shaft 1 is a first distance H1, and the first telescopic plate 3 abuts against the inner hole of the reel, that is, a force is applied to the sleeve. The inner hole of the roller device 001 effectively avoids the phenomenon that the reel slips during the rotation; in the second state, the first protrusion 321 cooperates with the low point 2112 of the guiding surface 211, and the outer portion of the first telescopic plate 3 The distance between the surface and the third outer edge 13 of the rotating shaft 1 is a second distance H2, wherein the first distance H1 is greater than the second distance H2, and the first expansion plate 3 has a first gap with the inner hole of the reel, That is, the contour of the roller device is deformed to facilitate the disassembly of the reel, that is, the user can easily take the waste carbon ribbon with one hand. It is convenient for users to use.

The present invention has been described by the above related embodiments, but the above embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the invention. Conversely, modifications and refinements made without departing from the spirit and scope of the invention are the scope of the invention.

001‧‧‧Roller

1‧‧‧ shaft

3‧‧‧First expansion board

4‧‧‧Roller

7‧‧‧Second expansion plate

11‧‧‧ first end

31‧‧‧ outer surface

41‧‧‧ openings

42‧‧‧First outer edge

Claims (11)

A roller device for cooperating with a reel, an inner hole of the reel is sleeved on the roller device, the roller device comprises: a rotating shaft having a first end and an axial direction The second end, the reel can be removed from the second end; a fixing member is fixed to the rotating shaft, the fixing member has a guiding portion, the guiding portion has a guiding surface, and the guiding surface is An axially inclined slope along the axis of rotation, the guiding mask has a high point and a low point, the high point is adjacent to the first end; and a first expansion plate is movable with the fixing member Connecting, the first telescopic plate has an outer surface and an inner surface corresponding to the outer surface, the outer surface being adapted to cooperate with the inner hole of the reel, the inner surface having a first protrusion, the first surface a protrusion for engaging with the guiding surface and sliding along the guiding surface; wherein, when the reel sleeved on the roller device is applied with a force in a first direction, the reel pair The first telescopic plate applies a frictional force in the first direction, and the first telescopic plate is subjected to the frictional force The guiding surface moves toward the first direction, so that the roller device changes from a first state to a second state. In the first state, the first protrusion cooperates with the high point of the guiding surface. a distance between the first telescopic plate and the rotating shaft is a first distance, the first telescopic plate abuts the inner hole of the reel, and in the second state, the first protrusion and the guiding surface The lower point of the first telescopic plate and the rotating shaft is a second distance, and the first telescopic plate has a first gap between the inner hole and the inner hole of the reel. A distance is greater than the second distance, the first direction being a direction from the first end to the second end. The roller device of claim 1, further comprising: a roller sleeve disposed on the rotating shaft and covering the fixing member, wherein the roller is provided with an opening, the first elastic plate is disposed at the opening, when When the first telescopic plate moves along the axial direction of the rotating shaft, the roller moves in the axial direction as the first telescopic plate moves due to the abutting of the first telescopic plate. The roller device of claim 2, wherein the roller has a first outer edge, and in the second state, the outer surface of the first flexible plate is flush with the first outer edge, and the roller device is In the first state, the outer surface of the first telescopic plate protrudes from the first outer edge. The roller device of claim 2, further comprising: a first elastic member having a first fixed end and a first free end, the first fixed end being connected to the fixing member, the first a free end is connected to the drum, and the first free end is closer to the second end of the rotating shaft than the first fixed end, and the elastic force direction of the first elastic element is the axial direction of the rotating shaft, when in the In the second state, the first elastic element is in a stretched state, and when the frictional force received by the first telescopic plate disappears, the first elastic element is reset, and the roller device is replaced by the first elastic element The second state transitions to the first state. The roller device of claim 4, further comprising: a second elastic member having the same structure as the first elastic member, and the first elastic member and the second elastic member are along the axis of the rotating shaft The heart is evenly or symmetrically distributed. The roller device of claim 1, wherein the inner surface has a pair of hooks, and the pair of hooks are symmetrically located on opposite sides of the first protrusion for engaging with the guiding portion, each of the hooks The first limiting portion and a second limiting portion extending from the first limiting portion toward the first protrusion are included. The roller device of claim 6, wherein the guiding portion further has a first surface and a second surface, the first surface and the second surface are adjacent to the first surface and the first limiting portion Cooperating and having a second gap, the second surface cooperates with the second limiting portion and has a third gap. The roller device of claim 1, wherein the first telescopic plate further comprises a second protrusion, the second protrusion and the first protrusion structure are the same, and the first protrusion and the second protrusion This axial distribution along the axis of rotation. The roller device of claim 8, wherein the fixing member further has a supporting portion, the first telescopic plate further includes a third protrusion, and the third protrusion and the first protrusion, the first Two convex The third protrusion is configured to cooperate with the support portion, and the third protrusion abuts the support portion when the roller device is in the first state. The roller device of claim 1, wherein the fixing member has a first fixing member and a second fixing member, the rotating shaft has a third outer edge, and the first fixing member is fixedly coupled with the second fixing member. The sleeve is sleeved on the third outer edge. A label printer comprising: a transmission mechanism and the roller device of any one of claims 1 to 10, wherein the first end of the rotating shaft of the roller device is fixedly coupled to the transmission mechanism to enable the transmission The mechanism drives the roller device.