CN2900177Y

CN2900177Y - Colour ribbon cartridge

Info

Publication number: CN2900177Y
Application number: CN 200620059029
Authority: CN
Inventors: 黄楠; 罗飞
Original assignee: Print Rite Technology Development Co Ltd of Zhuhai
Current assignee: Print Rite Technology Development Co Ltd of Zhuhai
Priority date: 2006-05-14
Filing date: 2006-05-14
Publication date: 2007-05-16
Anticipated expiration: 2016-05-14

Abstract

A ribbon cassette comprises a cassette, a cover, ribbons in the cassette, a gearing structure to drive these ribbons. Wherein, the gearing structure is composed of a driving shaft, the first and second driven gear, a gear disk on the driving shaft, a gear disk on the first driven gear to joggle with driving shaft and the second driven gear. In addition, the second driven gear is composed of a thru hole and a gear disk to mesh with the first driven gear. Tooth quantity of the gear disk for the driving shaft exceeds that of the first driven gear disk. Reference radius of the gear disk to joggle with the first driven gear and the driving shaft exceeds that of the gear disk to joggle with the second driven gear. One end of the driving shaft is inserted into the thru hole of the second driven gear. The utility model slows down ribbon moving and avoids tattooing needle obstruction or fracture during high-speed printing.

Description

Ribbon cartridge

Technical field

The utility model relates to the ribbon cartridge that impact printer is used, and is specifically related to a kind of ribbon cartridge with gear reduction.

Background technology

Impact printer is office's PRN device commonly used, and ribbon cartridge commonly used is made up of box body and lid, contains colour band and travelling gear in the box body.For example be the ribbon cartridge of traditional structure shown in Fig. 1 and Fig. 2, it comprises box body 100, lid 200, the driven gear 400 of being located at the driven wheel 300 in the box body 100 and meshing with driven wheel 300, the folding colour band 500 that is positioned in the box body 100.Colour band 500 passes the engagement position of driven wheel 300 and driven gear 400, passes from two arm gaps of box body 100, and forms a complete loop.Wherein, for for purpose of brevity, Fig. 1 and Fig. 2 are the omission view, have only expressed the structure at ribbon cartridge two ends, and the ribbon cartridge intermediate structure is omitted.When driven wheel 300 rotated, driven gear 400 also rotated thereupon, because the meshing relation between driven wheel 300 and the driven gear 400, colour band 500 obtains driving force and motion in colour band box body 100.

Now, in order to adapt to the demand of market to flying print, the printer that enhancement mode occurred, promptly on the basis of former printer, use can go out the printhead of pin and back stitching at a high speed, and the print needle of this flying print head more protrudes in the printing basal plane than original print needle, i.e. pitch smaller between print needle and colour band, when printing, can impact colour band quickly.But in print procedure, when printhead and colour band reverse movement, relative velocity between colour band and the printhead equals the movement velocity of colour band and the movement velocity sum of printhead, at this moment, the movement velocity of printhead increases, the speed of related movement of printhead and colour band also increases, if use original ribbon cartridge, the movement velocity of colour band does not become, then the relative velocity of printhead and colour band becomes big, the speed of ribbon motion and the speed of print needle do not match, the situation of print needle extension colour band even broken needle when impacting colour band at a high speed, printhead can take place too soon owing to relative velocity, colour band is also destroyed than being easier to, and makes the client have to change printhead and colour band, improves the cost that maintenance is used.

In order to solve the unmatched problem of colour band and high-speed printer, the producer that has is by new die sinking tool, the mode of redesign gear ratio solves, but because the ribbon cartridge space is less, the printer driver shaft position is fixed, and the change difficulty is bigger, if realize by the method that increases by two idler gears, then can increase material and production cost, die cost is very high.Therefore, provide a kind of and have the novel ribbon cartridge of reducing gear in fact for necessary.

The utility model content

The purpose of this utility model provides a kind of simple in structure, the low-cost ribbon cartridge that also can realize flying print.

For achieving the above object, the utility model provides following technical scheme: ribbon cartridge, comprise: can built-in colour band and be provided with the box body of two arms, the lid that is interlocked with box body, be contained in the colour band in the box body, be used to drive the gear structure that colour band rotates, wherein, described gear structure comprises a driving shaft, first driven gear with the driving shaft engagement, second driven gear with the engagement of first driven gear, driving shaft is provided with a toothed disc, first driven gear have one with driving shaft meshed gears dish and at least one and the second driven gear meshed gears dish, second driven gear comprises through hole and at least one and first a driven gear meshed gears dish longitudinally, the number of teeth of axle shaft gear dish is less than the number of teeth with the first driven gear toothed disc of its engagement, in first driven gear with driving shaft meshed gears dish reference radius greater than the toothed disc reference radius that is meshed with second driven gear, an end of driving shaft inserts in the through hole of second driven gear.

According to the technical solution of the utility model, first driven gear has three toothed discs, and one is meshed with driving shaft, and two are meshed with second driven gear, and second driven gear also has two toothed discs that are meshed with first driven gear.

Compare with previous technology, the utility model ribbon cartridge is by setting up driving shaft, and with the driven gear of driving shaft engagement on the reference radius of different toothed discs is set, the velocity of rotation that the printer driver axle is transmitted reduces, thereby the movement velocity of colour band is reduced, can be complementary with the striking speed of print needle, avoid occurring tuck and the broken needle phenomenon that excessive velocities occurs, and can on original mould, change mould, and realize multiple speed by changing axle shaft gear, be suitable for different types of machines and can not increase a lot of costs.

Description of drawings

Fig. 1 is the decomposing schematic representation of known ribbon cartridge;

Fig. 2 is the plane that lid is removed in ribbon cartridge assembling shown in Figure 1 back;

Fig. 3 is the decomposing schematic representation of the utility model ribbon cartridge;

Fig. 4 is the schematic diagram that is used for the driving shaft of the utility model ribbon cartridge;

Fig. 5 is the bottom view of driving shaft shown in Figure 4;

Fig. 6 is the schematic diagram that is used for first driven gear of the utility model ribbon cartridge;

Fig. 7 is the schematic diagram that is used for second driven gear of the utility model ribbon cartridge;

Fig. 8 removes the axonometric drawing of lid for the utility model ribbon cartridge assembling back;

Fig. 9 is the profile after the ribbon cartridge assembling shown in Figure 8;

The utility model is described in further detail below in conjunction with each figure and most preferred embodiment.

The specific embodiment

For the ease of understanding, the term that occurs in the specification is explained as follows: the gear compound graduation circle, being meant the basic circle that calculates the gear physical dimension, is the circle between gear teeth tip circle and root circle, and the linear velocity during gear movement is directly proportional with this gear compound graduation radius of a circle.

With reference to Fig. 3, the utility model ribbon cartridge comprises box body 1, and lid 2 places the colour band in the box body 1, is located at the gear reduction in the box body 1.Described gear reduction comprises driving shaft 3, the first driven gears 4 and second driven gear 5.Gear reduction is located at the left side of colour band box body 1.Be provided with two through

holes

11,12 in the left side of box body 1, box body 1 two ends respectively are provided with an

extension arm

13,14, at the box body opposite side relative with gear structure, also are provided with a shell fragment 15 that is used to press colour band.The left end of lid 2 is provided with two

perforates

21,22, simultaneously, the two ends of lid also be provided with box body 1 on the

extension arm

23,24 of the corresponding cooperation of extension arm.Be respectively equipped with the installing hole that cooperatively interacts on box body 1 and the lid 2 and projection is installed.

With reference to Fig. 4 to Fig. 7, driving shaft 3 is provided with a toothed disc 30, and this toothed disc 30 is divided into two

parts

301 and 302 up and down with driving shaft.Driving shaft 3 upwards is provided with a cylindrical cavity 31 from its bottom surface, the sidewall of this inner chamber 31 is provided with fin 32.When cooperating with printer, the driving shaft of printer (not shown) will stretch in the groove 31 of driving shaft 3, match with fin 32, and the driving shaft 3 that drives ribbon cartridge rotates.First driven gear 4 comprises three toothed discs, is respectively the dish 41 that cogs, middle gear dish 42 and lower tooth wheel disc 43.Second driven gear 5 comprises two toothed discs, and cog dish 51 and lower tooth wheel disc 52, the second driven gears 5 also comprise a circular hole 50 that vertically connects.Wherein, the middle gear dish 42 of first driven gear 4 is all identical with the number of teeth of next wheel disc 43 and gear compound graduation radius of circle, and the gear compound graduation radius of circle of the dish 41 that cogs is greater than the gear compound graduation radius of circle of middle gear dish 42 and lower tooth wheel disc 43.The number of teeth and the gear compound graduation radius of a circle of the upper and

lower toothed disc

51,52 of second driven gear 5 are also identical.

With reference to Fig. 8 to Fig. 9, in when assembling, the end portion 302 of driving shaft 3 passes the circular hole 50 of second driven gear 5, and and second driven gear 5 be located at through hole 12 places of box body 1 together; And first driven gear 4 is installed in another through hole 11 places on the box body 1, and then lid 2 is placed on the box body 1, and the top that the upper part 301 of driving shaft 3 is piercing in perforate 22, the first driven gears 4 of lid 2 is piercing in the perforate 21 of lid 2.When driving, the toothed disc 30 of driving shaft 3 is meshed with the dish 41 that cogs of first driven gear 4, and the middle gear dish 42 of first driven gear 4 and lower tooth wheel disc 43 mesh respectively at cog dish 51 and the lower tooth wheel disc 52 of second driven gear 5 again.When driving shaft 3 is driven in rotation, the toothed disc 30 of driving shaft 3 drives first driven gear 4 by dish 41 the engagement that cogs with first driven gear 4, and the middle gear dish 42 of first driven gear 4 and lower tooth wheel disc 43 are by driving second driven gear with the toothed disc 51 of second driven

gear

5 and 52 engagement, colour band passes between first driven gear 4 and second driven gear 5, by the engaging friction power driven rotary between first driven gear 4 and second driven gear 5.When rotation, driving shaft 3 has identical linear velocity with first driven gear 4, and the number of teeth of the toothed disc 30 of driving shaft 3 is less than first driven gear 4 dish 41 the number of teeth that cogs, therefore, angular speed when the angular speed when first driven gear 4 rotates rotates less than driving shaft 3, that is, the rotating speed of first driven gear 4 is less than the rotating speed of driving shaft 3; Simultaneously, first driven gear 4 cog the dish 41 and in, lower

tooth wheel disc

42,43 have unequal angular velocity, and cog dish 41 reference radius greater than in, lower

tooth wheel disc

42,43 reference radius, under the situation of same angular velocity, linear velocity is directly proportional with reference radius, the linear velocity of middle gear dish 42 and lower tooth wheel disc 43 can reduce again, so, even the speed of printer driver axle improves, by cooperating of driving shaft 3 and first driven gear 4 and first driven gear 4 and second driven gear 5, the linear velocity of gear motion between first driven gear 4 and second driven gear 5 can be reduced, the while also reduces the speed of ribbon motion.

Really, the number of teeth on the axle shaft gear dish in the present embodiment can also be according to different requirements and different, obtain different speed by changing driving shaft; The toothed disc number of driven gear also can be adjusted as required, for example the middle gear dish 42 of first driven gear and lower tooth wheel disc 43 can be combined into a toothed disc, accordingly, the upper and lower

toothed disc

51,52 of second driven gear that cooperates with it also can be combined into a toothed disc; The lower end that second driven gear can be enclosed within driving shaft also can be enclosed within the upper end of driving shaft, can change as required, all should be included within the described scope of claim such as these minor alterations and equivalent transformation.

Claims

1, ribbon cartridge comprises:

Can built-in colour band and be provided with the box body of two arms;

The lid that is interlocked with box body;

Be contained in the colour band in the box body;

Be used to drive the gear structure that colour band rotates;

It is characterized in that: described gear structure comprises a driving shaft, first driven gear with the driving shaft engagement, second driven gear with the engagement of first driven gear, driving shaft is provided with toothed disc, first driven gear has and driving shaft meshed gears dish and at least one and the second driven gear meshed gears dish, second driven gear comprises through hole and at least one and first a driven gear meshed gears dish longitudinally, wherein, the number of teeth of axle shaft gear dish is less than the number of teeth with the first driven gear toothed disc of its engagement, in first driven gear with driving shaft meshed gears dish reference radius greater than the toothed disc reference radius that is meshed with second driven gear, an end of driving shaft inserts in the through hole of second driven gear.

2, ribbon cartridge according to claim 1, it is characterized in that: described first driven gear has three toothed discs, one is meshed with driving shaft, and two are meshed with second driven gear, and second driven gear also has two toothed discs that are meshed with first driven gear.