TWI542477B - Ribbon cartridge - Google Patents

Description

Ribbon 匣

The present invention relates to a ribbon cassette for a printer.

The dot matrix type printer printing method utilizes a plurality of needles on the list machine and can control the needle to strike a printing area, wherein the printing area is provided with a ribbon 匣, and the ribbon 匣 is provided with an ink ribbon. The ink on the ribbon can be printed on the paper after the needle hits the printing area, and after the continuous impact through the needle, the paper can form characters or figures.

However, the ribbon on the dot matrix lister needs to provide enough ink for printing, so a long ribbon is used, and the foam layer or the rubber layer on the two transmission wheels are pressed against each other to clamp. The color ribbon is rotated in the opposite direction by the two transmission wheels to drive the foam layer or the rubber layer to move the ribbon, so that the original ink ribbon in the printing area can be replaced with the ink color. Bring it for printing.

However, in order to prevent the foam layer or the rubber layer on the transmission wheel from being pressed against each other due to long-term use, the manufacturer causes the foam layer to be deformed and the ribbon of the ribbon is not smoothly moved. Or the rubber layers are metamorphosed and adhered to each other, which makes the transmission wheel difficult to rotate. Therefore, some manufacturers have developed a ribbon cartridge that can be avoided from the above situation. Please refer to FIG. 13 , which is mainly pivoted in a cassette 80 respectively. a first foaming wheel 81 and a second foaming wheel 82 (hereinafter exemplified by foam) which are relatively rotatable, wherein the first bubble The cotton wheel 81 is pivotally disposed at a fixed position of the cassette 80, and the second foaming wheel 82 is pivotally disposed in a movable pivot hole 801 formed on the cassette 80 and movable at both ends of the movable pivot hole 801; Further, the second foam wheel 82 is provided with a wheel seat 90. The wheel seat 90 is disposed between the wheel base 90 and the side wall of the cassette 80 through a spring 91, and a fixing hole 92 is formed on the wheel base 90; When the belt is not used before, or when it is not used for a certain period of time, the second foaming wheel 82 can be moved to the outside through the wheel base 90, and fixed on the cassette 80 by the fixing hole 92 on the wheel base 90, so that the first The second foaming wheel 82 is located at one end of the movable pivot hole 801 and is separated from the first foaming wheel 81. When starting to use, referring to FIG. 14, the fixing state of the fixing hole 92 is released, and the second bubble is at this time. The cotton wheel 82 is pushed up by the spring 91 and moved to the other end of the movable pivot hole 801, and is engaged with the first foam wheel 81 and can relatively roll the ribbon, thereby moving the driveable ribbon.

The above-mentioned ribbon 匣 which is free from foam deformation or rubber sticking, although the isolation device is provided, the two foam wheels or rubber wheels in the ribbon 免 can be prevented from being squeezed for a long time, but the aforementioned isolation measures will make the ribbon The structure of the crucible tends to be complicated, the manufacturing cost is relatively increased, and the consumer often forgets to release the isolation device, so that the ribbon is broken in the same block and the ribbon is broken, and the problem of failure to be used is not long, and it is necessary to further review. And seek a feasible solution.

The present invention provides a mechanism for preventing the foam deformation or rubber sticking of the transmission wheel of the prior art, which is inconvenient to be relieved by manual operation by the user, and which is complicated in construction and causes cost increase. The ribbon 匣, which prevents the deformation of the foam of the transmission wheel or the rubber sticking mechanism, is designed to be automated, so there is no need to manually remove it. The convenience in use is improved, and the number of components is relatively reduced, thereby reducing the cost.

In order to achieve the above object, the technical means adopted by the present invention is to design a ribbon cartridge, comprising: a casing having an inner space, the casing wall surface being recessed and formed with at least one driving wheel hole and at least one length The shaft portion has a starting end and an ending end; a driving wheel is pivoted in the inner space of the housing and is disposed in the driving wheel hole of the housing, and the driving wheel includes a coaxially disposed one. a gear portion and a clamping portion; a driven wheel movably pivoted in the inner space of the housing and disposed in the long shaft portion of the housing, the passive wheel including a gear portion coaxially disposed and a The clamping portion, the gear portion of the driven wheel meshes with the gear portion of the driving wheel; a lever member is fixed in the inner space of the housing, and one end is disposed between two teeth of the gear portion of the driven wheel; Wherein, when the passive wheel is located at the beginning end of the long axis portion, the passive wheel has a first distance between the driving wheel and the driving wheel; when the passive wheel is located at the end end of the long axis portion, there is a second between the driven wheel and the driving wheel Distance; the first distance is greater than the second distance; Before-use, at the beginning end of the driven pulley, the driven pulley and the driving wheel interposed portion interposed portion separated.

The invention has the advantages that the passive wheel is located at a position not in contact with the clamping portion of the driving wheel before the first use, so that the clamping portion of the driving wheel and the passive wheel can be prevented from being abutted at the same point for a long time. The clamping portion is deformed or deteriorated and is sticky; in use, after the driving wheel rotates, the driven wheel is driven to rotate together by the gear portion, and the passive wheel rotates due to the tooth A lever member is disposed between two teeth of the wheel portion, and the lever member is fixed to the housing, so the passive wheel will move with the lever member as a fulcrum, and after the passive wheel disengages from the lever member, the tangent of the gear portion of the driving wheel continues. Driven by the horizontal component force, the horizontal component of the tangent is much larger than the resistance of the passive wheel. During the movement of the passive wheel, the clamping part of the driving wheel and the passive wheel will gradually abut, thereby achieving the clamping and driving of the ribbon. The utility model can eliminate the distance between the passive wheel and the driving wheel clamping portion without manual operation, thereby preventing the user from continuously moving the needle to the broken position because the user can forget to release the mechanism for preventing the deformation of the transmission wheel. The present invention can thereby effectively improve the convenience in use.

Further, the ribbon cassette has a long axis portion of the housing extending in a horizontal straight line.

Alternatively, the ribbon cassette has a long axis portion of the housing extending obliquely in a straight line.

Or the ribbon cassette, wherein the long shaft portion of the housing extends in a bent manner, and the long shaft portion further includes a turning end; when the driven wheel is at the turning end, there is a between the driven wheel and the driving wheel. a third distance; the aforementioned second distance is greater than the third distance. Moreover, in the ribbon 匣, in the long axis portion of the casing, a straight line extends between the starting end and the turning end, and a straight line extends between the turning end and the ending end.

Further, the ribbon cassette is characterized in that the lever member is a rib and is formed on an inner wall surface of the housing.

Further, the ribbon cassette has a long hole in each long shaft portion of the housing.

Or the ribbon 匣, wherein each long axis portion of the housing For a long slot.

10‧‧‧shell

11‧‧‧Base

111‧‧‧Active wheel hole

112‧‧‧Long shaft

12‧‧‧ Cover

121‧‧‧Active wheel hole

122‧‧‧Long shaft

20‧‧‧Drive wheel

21‧‧‧ Gear Department

22‧‧‧Clamping Department

30‧‧‧passive wheel

31‧‧‧ Gear Department

32‧‧‧Clamping Department

40‧‧‧ lever parts

50‧‧‧ ribbon

61‧‧‧starting end

62‧‧‧ End point

L1‧‧‧ first distance

L2‧‧‧Second distance

L3‧‧‧ third distance

10A‧‧‧shell

112A‧‧‧Long shaft

10B‧‧‧Shell

112B‧‧‧Long shaft

20B‧‧‧Drive wheel

30B‧‧‧passive wheel

50B‧‧‧ ribbon

61B‧‧‧Starting end

62B‧‧‧ Terminal

63B‧‧‧ turning end

80‧‧‧Carmen

801‧‧‧ activities pivot hole

81‧‧‧First foam wheel

82‧‧‧Second foam wheel

90‧‧·wheel seat

91‧‧‧ Spring

92‧‧‧Fixed holes

Figure 1 is a perspective view of the present invention.

Figure 2 is a schematic exploded view of the components of the present invention.

Figure 3 is an exploded view of a portion of the components of the present invention.

Figure 4 is a front elevational view of the front gear portion of the present invention.

Figure 5 is a front elevational view of the intervening portion of the present invention.

Figure 6 is a schematic view showing the movement path of the passive wheel of the present invention.

Figure 7 is a front elevational view of the gear portion in use of the present invention.

Fig. 8 is a front view showing the interposed portion when the present invention is used.

Figure 9 is a front elevational view showing another embodiment of the present invention.

Figure 10 is a front elevational view showing another embodiment of the present invention.

11 is a schematic view showing a moving path of a passive wheel according to still another embodiment of the present invention.

Figure 12 is a diagram showing the force relationship when the present invention is used.

Figure 13 is a front elevational view of a prior art ribbon cartridge prior to use.

Figure 14 is a front elevational view of a prior art ribbon cartridge.

The technical means adopted by the present invention for achieving the intended purpose of the invention are further described below in conjunction with the preferred embodiments of the invention.

Referring to FIGS. 1 to 3, the ribbon cartridge of the present invention comprises a housing 10, a driving wheel 20, a driven wheel 30, a lever member 40 and a ribbon 50.

Referring to FIG. 2 to FIG. 5 , the housing 10 has an internal space, and the housing 10 includes a base 11 and an outer cover 12 . A driving wheel hole 111 and a long shaft portion 112 are disposed through the seat 11, and a driving wheel hole 121 and a long shaft portion 122 are also disposed on the outer cover 12, and the driving wheel holes 111 and 121 of the base 11 and the outer cover 12 are For the circular hole, the long shaft portions 112 and 122 of the base 11 and the outer cover 12 are long holes, but the long shaft portions 112 and 122 may also be long grooves.

The driving wheel 20 is pivotally disposed in the inner space of the housing 10 and includes a gear portion 21 and an clamping portion 22 disposed coaxially. One end of the driving wheel 20 is disposed through the driving wheel hole 111 of the base 11 and the other end. The driving wheel hole 121 of the outer cover 12 is inserted to operate and rotate the mechanism of the printer. In the embodiment, the material of the clamping portion 22 is foam or rubber.

The passive wheel 30 is movably pivoted in the inner space of the housing 10 and includes a gear portion 31 and an clamping portion 32 disposed coaxially; the gear portion 31 of the driven wheel 30 and the gear portion of the driving wheel 20 The two ends of the passive wheel 30 are respectively disposed on the long shaft portions 112 and 122 of the base 11 and the outer cover 12; in the embodiment, the material of the intervening portion 32 is foam or rubber.

Referring to FIG. 3 to FIG. 6 , the moving path of the driven wheel 30 in the casing 10 is the shape of the long shaft portions 112 , 122 of the base 11 and the outer cover 12 . In this embodiment, each long axis The portions 112 and 122 are each a horizontal straight long hole and include a starting end 61 and an ending end 62. When the driven wheel 30 is located at the starting end 61, the passive wheel 30 and the driving wheel 20 have a first distance therebetween. L1; when the passive wheel 30 is at the end point 62, the passive wheel 30 and the driving wheel 20 have a second distance L2; the first distance L1 is greater than the second distance L2; before the first use, the passive wheel 30 is located at the starting end 61, and the clamping portion 32 of the driven wheel 30 and the clamping portion 22 of the driving wheel 20 Separation.

As shown in FIG. 3 and FIG. 4, the lever member 40 is fixed in the inner space of the housing 10. The lever member 40 is a rib and is formed on the inner wall surface of the outer cover 12 of the housing 10. The lever member 40 is formed. One end is disposed between two of the teeth of the gear portion 31 of the driven wheel 30.

Referring to FIG. 2 to FIG. 5, the casing 10 of the present invention is provided with a color ribbon 50. The ribbon 50 is annular, and a portion of the ribbon 50 is exposed outside the casing 10. The ribbon 50 in the casing 10 passes. Between the driving wheels 20 and the clamping portions 22 and 32 of the driven wheel 30.

Referring to FIG. 3 to FIG. 6 , before the first use, the driven wheel 30 is located at the starting end 61 , that is, the farthest distance from the driving wheel 20 . At this time, the driving wheel 20 and the driven wheel 30 only have the gear portion 21 . 31, micro contact and meshing, the driving wheel 20 and the clamping portions 22, 32 of the passive wheel 30 are not in contact, thereby preventing the two clamping portions 22, 32 from abutting at the same point due to long time no rotation to cause Deformed or deteriorated and sticky.

Referring to FIG. 3 and FIG. 6 to FIG. 8 , when the driving wheel 20 is rotated by the mechanism of the printer in use, the driven wheel 30 meshes with the gear portion 21 of the driving wheel 20 due to the gear portion 31 thereof. Therefore, the driven wheel 30 also rotates together; when the driven wheel 30 rotates, at the same time, since the lever member 40 is interposed between the two teeth of the gear portion 31, the lever member 40 is fixed in the housing 10, so the passive wheel 30 will move along the shape of the long shaft portions 112, 122 of the housing 10 with the lever member 40 as a fulcrum, and the driven wheel 30 will move away from the lever member 40 and continue to be driven by the gear portion 21 of the driving wheel 20, in the driven wheel 30. During the movement from the starting end 61 to the end point 62, the clamping portions 22, 32 of the driving wheel 20 and the driven wheel 30 will gradually abut and become more and more tightly clamped. The belt 50, at this time, the rotation of the driving wheel 20 and the driven wheel 30 can drive the ribbon 50 to move, so as to exert the effect of the ribbon ,, and in the whole process, the change state of the resistance is as shown in FIG. 12, at the beginning end. When the point a, the driving wheel 20 applies the horizontal component of the driven wheel 30 greater than 1000 gf (mike force). When the clamping portions 22, 32 of the driving wheel 20 and the driven wheel 30 start to abut (point b), the passive wheel will be made. The resistance received by 30 gradually increases to 100 gf as the clamping portions 22, 32 are squeezed, and when the driven wheel 30 moves to the point of the lever member 40c, the horizontal component of the driving wheel 20 is reduced to 200 gf. Until the end point d point.

Therefore, the present invention can change the clamping portions 22 and 32 of the driving wheel 20 and the driven wheel 30 from the non-contact to the abutting, thereby facilitating the smooth use; the present invention improves the convenience of use and Simplify construction and reduce component count, in addition to significantly reducing costs and reducing failures.

In addition, when the present invention is temporarily not used, the driving wheel 20 is slightly reversely rotated to rotate the driven wheel 30 back to the original position, and the lever member 40 is again disposed between the two teeth of the driven wheel 30, thereby avoiding the initiative. The clamping portions 22, 32 of the wheel 20 and the driven wheel 30 are deformed by a long time; when used next time, the lever member 40 will still function again to push the driven wheel 30 toward the end point 62, so the driving wheel 20 and The passive wheel 30 can still effectively drive the ribbon 50 to move.

Moreover, when the driven wheel 30 is reversely rotated back to the original position or before the first use, since the gear portion 31 of the driven wheel 30 is engaged with the lever member 40, the driven wheel 30 cannot be further reversely rotated, and the driving wheel 20 cannot be coupled. Then reverse rotation, so that the user can avoid the accidental touch or reverse rotation to the driving wheel 20, causing the ribbon 50 to be reversely moved by the driving wheel 20. barrier.

Referring to FIG. 9 , in other embodiments, the long axis portion 112A of the housing 10A may not be a straight long hole in the horizontal direction but an oblique straight long hole, which does not affect the present invention. .

Referring to FIG. 10 and FIG. 11 , in other embodiments, the long-axis portion 112B of the housing 10B may not be a straight long hole but a bent long hole; the long-axis portion 112B further includes a turning end 63B. A straight line extends between the starting end 61B and the turning end 63B, and a straight line extends between the turning end 63B and the ending end 62B. When the driven wheel 30B is located at the turning end 63B, there is a third between the driven wheel 30B and the driving wheel 20B. The distance L3 is smaller than the aforementioned second distance L2; in use, when the driven wheel 30B passes over the turning end 63B, the driven wheel 30B is disengaged from the lever member 40B, but is still driven by the driving wheel 20B.

Since the ribbon 50B is folded into a plurality of layers in the middle portion of the casing 10B and closely arranged (not shown) to raise the total length of the ribbon 50B, the closely arranged ribbons 50B are naturally applied to both sides. A thrust may push the driven wheel 30B from the end point 62B back to the starting end 61B; at this time, a shortest distance turning end 63B is provided between the end point 62B and the starting end 61B to form a resistance against the ribbon 50B. The thrust prevents the passive wheel 30B from being pushed back.

When not in use temporarily, the driving wheel 20B can be manually reversely rotated to force the driven wheel 30B to return to the home position beyond the turning end 63B.

In other embodiments, the lever member may not be formed on the inner wall surface of the outer cover of the housing, but is formed on the inner wall surface of the base, which also does not affect the present invention for its purpose.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and A person skilled in the art can make some modifications or modifications to equivalent embodiments by using the above-disclosed technical contents without departing from the technical scope of the present invention. The present invention is not limited to any simple modifications, equivalent changes and modifications of the above embodiments.

10‧‧‧shell

11‧‧‧Base

112‧‧‧Long shaft

20‧‧‧Drive wheel

21‧‧‧ Gear Department

30‧‧‧passive wheel

31‧‧‧ Gear Department

40‧‧‧ lever parts

50‧‧‧ ribbon

Claims (10)

A ribbon cartridge includes: a casing having an inner space, the casing wall surface being recessed and formed with at least one driving wheel hole and at least one long shaft portion, the long shaft portion including an initial end and an end end; The wheel is pivotally disposed in the inner space of the casing and is disposed in the driving wheel hole of the casing. The driving wheel includes a gear portion and a clamping portion disposed coaxially. The material of the clamping portion of the driving wheel is Foam or rubber; a passive wheel movably pivoted in the inner space of the casing and disposed in the long shaft portion of the casing, the driven wheel includes a gear portion and a clamping portion disposed coaxially The gear portion of the driven wheel meshes with the gear portion of the driving wheel, and the material of the clamping portion of the driven wheel is made of foam or rubber; a lever member is fixed in the inner space of the casing, and the passive wheel is located at the lever member and Between the driving wheels, one end of the lever member is disposed between two teeth of the gear portion of the driven wheel, and the extending direction of the lever member is non-parallel to the extending direction of the long shaft portion of the casing; wherein, when the passive wheel is located on the long axis At the beginning of the part, there is a between the passive wheel and the driving wheel a distance; when the passive wheel is located at the end of the long axis portion, the passive wheel and the driving wheel have a second distance; the first distance is greater than the second distance; before the first use, the passive wheel is located at the starting end, and is The clamping portion of the moving wheel is separated from the clamping portion of the driving wheel. The ribbon cartridge of claim 1, wherein the long axis portion of the housing extends in a horizontal straight line. The ribbon cartridge of claim 1, wherein the long axis portion of the housing extends obliquely in a straight line. The ribbon cartridge of claim 1, wherein the long shaft portion of the housing extends in a bent manner, and the long shaft portion further includes a turning end; when the driven wheel is at the turning end, the passive wheel and the driving wheel have a third distance; the aforementioned second distance is greater than the third distance. The ribbon cassette according to claim 4, wherein in the long axis portion of the housing, a straight line extends between the starting end and the turning end, and a straight line extends between the turning end and the ending end. The ribbon cartridge according to any one of claims 1 to 5, wherein the lever member is a rib and is formed on an inner wall surface of the casing. The ribbon cartridge of any one of claims 1 to 5, wherein each of the long axis portions of the housing is a long hole. The ribbon cartridge of claim 6, wherein each of the long axis portions of the housing is a long hole. The ribbon cartridge of any one of claims 1 to 5, wherein each of the long axis portions of the housing is a long groove. The ribbon cartridge according to claim 6, wherein each of the long axis portions of the housing is a long groove.