JPH07100502B2 - Cassette type label printer - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a label printer that prints labels attached to various products, and particularly to a cassette type printer suitable for printing a large number of various types of labels. Label printers.

[Prior Art] In recent years, with the development of supermarkets and the like that sell a large number of products of various types, a label printer that issues a large number of types of labels most suitable for each product has become widespread. In this type of label printer, generally, a label roll formed by winding a mount on which a label is attached in a roll shape is attached to the printer, and the labels are sequentially transferred and printed. Therefore, it is necessary to mount the label roll when the label is lost during printing or when the label type is exchanged. In this case, the leading end of the label roll has to be pulled around along a predetermined guide to be loaded, which makes the work troublesome, and especially when there are many label types, the replacement work also increases, which is one of the causes of lowering work efficiency. Was becoming. Also,
When replacing the type of label, the leading end of the previously loaded label roll has to be cut at the location of the printing device, and there is the problem that several labels are wasted.

In order to eliminate such inconvenience, the present applicant first
A cassette-type label printer has been proposed (JP-A-60-18).
8821 publication). This is one in which the label roll and the receipt paper are stored in a cassette case so that the label and the receipt paper can be easily replaced.

[Problems to be Solved by the Invention] By the way, in the above-described conventional label printer, the structure is such that the platen roller is built in the cassette case and the paper is sandwiched between the platen roller and the thermal head provided on the main body side. As a result, the pressure between the platen roller and the thermal head becomes uneven depending on the mounting condition of the cassette.
There is a drawback that the print quality varies.

In addition, since the platen roller and the thermal head must be in pressure contact with each other, there are restrictions on the position of the platen roller in the cassette and the arrangement of parts around it.
There was also the problem of reducing the degree of freedom in design.

The present invention has been made under such a background, and an object of the present invention is to provide a cassette type label printer which can always print with high printing quality and has a high degree of freedom in design.

[Means for Solving the Problems] In order to solve the above problems, the present invention stores a label roll and a cassette having a feeding roller for feeding the label, and a mounting for mounting the cassette on the label printer main body side. Section, and a platen roller disposed on the label printer main body side and transferring the label fed from the cassette by the feeding roller with the cassette mounted, the platen roller and the feeding roller are interlocked with each other. And a printing means for printing on the label while sandwiching the label transferred by the platen roller together with the platen roller, the driving means interlocking the platen roller and the feeding roller. While feeding, the direction opposite to the feeding direction of the label It is characterized in that it has a function of rewinding the fed-out label into the inside of the cassette by driving.

[Operation] According to the above configuration, when the cassette is mounted, the leading end of the label fed by the feeding roller is conveyed to the platen roller by the feeding roller. Then, the label transferred to the platen roller is printed while being transferred by the platen roller and being pressed and sandwiched by the printing unit and the platen roller. in this case,
The printing section and the cassette are completely independent,
Since all the printing parts are attached to the label printer body side, it does not depend on the mounting state of the cassette,
Good printing can always be performed.

Further, since it is only necessary to incorporate the feeding roller in the cassette, there is a great degree of freedom in design.

Further, since the feeding roller and the platen roller are interlocked with each other, the once fed label can be rewound into the cassette. Thereby, it is possible to eliminate the waste of the label when the cassette is taken out.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

1 to 8, 1 is a label printer main body, 2
Is a stand for supporting the label printer body 1. A display unit 5 and an operation unit 6 are provided above the front panel 3 of the label printer body 1, and a switch unit 7 is provided below the front panel 3. Further, the label 8 attached to the mount 8a is fed out from the lower right end of the front panel 3,
The take-up reel 9 is adapted to be wound up.

FIG. 2 is a front view showing the configuration of the display unit 5, the operation unit 6, and the switch unit 7.

First, the display unit 5 displays each item to be printed on the label 8, and includes an area 5a for displaying a product name, product attributes, or various messages, a manufacturing date, a product weight, a sales date, etc. Is displayed, an area 5c for displaying a product number and a selling price, and an area 5d for displaying a flight number, a label type and the like. Each area 5a to 5d is composed of a liquid crystal display.

The operation unit 6 is composed of a flat keyboard 6a including ten keys and function keys, and a mode changeover switch 6b for changing over the operation mode of the label printer. The operation modes include a label issuing mode, an online mode, a master registration mode, and a date mode.

The switch unit 7 includes a power switch 7a, a label rewind switch 7b, a label feed switch 7c, a label adjustment sensor sensitivity adjustment knob 7d, and an external device connection connector.
It is composed of 7e.

Next, the main parts of the label printer body 1 and the cassette 30 will be described with reference to FIGS.

In these figures, 10 is a side plate fixed vertically to the main body 1. The central portion and the lower portion of the support plate 11 are superposed and fixed to the front surface of the side plate 10 (FIG. 6). The upper portion of the support plate 11 is bent forward in a stepwise manner, and the cassette mounting plate 12 is fixed to this portion in parallel with the side plate 10.

A stepping motor 13 is fixed to the backside of the side plate 10 in a portion where the side plate 10 and the support plate 11 overlap each other. The shaft 13a of the stepping motor 13 projects toward the front of the support plate 11, and the motor-side gear 14 is fitted in the projecting portion and the shaft 13a
The tip of is fitted into a bearing 16 attached to the bearing plate 15 (Fig. 3). The bearing plate 15 is screwed and fixed to the front surface of the support plate 11. A pulley 17 is fitted on the shaft 13a of the stepping motor 13 on the back side of the side plate 10 (Fig. 8) to drive the timing belt 18. The timing belt 18 rotationally drives the platen roller 21 of the printing unit 20, and includes a pulley 17 and a pulley 22.
A gear that is stretched horizontally between and and shares the axis with the pulley 22.
The platen roller 21 is rotationally driven via a gear 22a having a common axis with the platen roller 21.

A thermal head 23 is disposed above the platen roller 21 so as to face it, and a head pressing spring that urges the thermal head 23 downward.
The platen roller 21 is pressed by 24. Then, the label 8 transferred between the platen roller 21 and the thermal head 23 is printed. This label 8
A pair of upper and lower guide plates 25a, which are fed from the cassette 30,
The platen roller 21 is guided between the guide plates 25 composed of 25b and is fed to the outside by the platen roller 21. A label detection sensor 26 including an emitting element 26a and a light receiving element 26b is provided in the middle of the guide plate 25 to detect the label 8. This detection is
At the space between the labels 8 attached in a line on the mount 8a,
This is done by utilizing the fact that the amount of light received increases.

The printing unit 20 also includes a lever 27 that rotates about a pin 27a.
When the upper end is rotated counterclockwise, the support portion 21a of the platen roller 21 rotates downward about the pin 21b, and the platen roller 21 is separated from the thermal head 23.
The heating element of the thermal head 23 can be cleaned. The support portion 21a is stopped at the position shown in FIG. 3 or FIG. 4 by a pin 21c that fits into the lower end recess of the lever 27. A cutter 28 is provided on the upper front side of the platen roller 21, and a guide plate 29 is provided below the thermal head 23.

Next, the cassette 30 will be described with reference to FIG.

The cassette 30 accommodates the label roll and feeds the leading end of the label 8 to the printing unit 20.
It is composed of a storage unit 30a having a circular container shape and a feeding unit 30b provided below the storage unit 30a.

The storage portion 30a is covered with a circular cassette lid 32 having a handle 31 attached to the center thereof. When the cassette lid 32 is removed, a label roll set shaft 33 protruding from the bottom plate 30c is provided at the center of the storage portion 30a. When the center hole of the label roll is fitted into this shaft 33, the label roll is mounted.
The cassette lid 32 is fixed by a lock pin 33a protruding inward of the label roll set shaft 33 and a fixing plate 31a (Fig. 6) attached to the tip of the handle 31. In addition, at the center of the rear end face of the label roll set shaft 33, the bottom plate 30c
A guide hole 42a 'is provided so as to penetrate through, and a guide hole 42b' is provided near the feeding portion 30b.

The feeding section 30b includes a feeding roller 35, a pinch roller 36 pressed by the feeding roller 35, a guide plate 37 for guiding the fed label, and a rewinding guide plate 38.

The rear end of the shaft of the feeding roller 35 is the bottom plate 30c of the cassette 30.
From the rear, and the gear 35a
Is fixed. The gear 35a is a gear that meshes with the above-described motor-side gear 14 when the cassette 30 is mounted on the main body 1, whereby the feeding roller 35 is rotationally driven. On the other hand, a coil spring 35b that biases the roller 35 rearward is fitted on the front end of the shaft of the feeding roller 35. This is for automatically engaging the stepping motor 13 when the cassette 30 is mounted on the main body 1 even when the motor side gear 14 and the gear 35a do not engage with each other. is there. A manual knob 35c is attached to the front end of the feeding roller 35 so that the label 8 can be manually fed. The gear 35a is covered with a cover 35d.

The pinch roller 36 is rotatably fitted onto the shaft 36a, and the shaft 36a
Both ends of the feeding roller 3 by the coil spring 36b
It is biased in the direction of 5 (Fig. 8). The bearing 36c of the shaft 36a is formed in a long hole shape so that the pinch roller 36 contacts the delivery roller 35 or separates from it. The reason for this will be explained later.

The label 8 transferred between the feeding roller 35 and the pinch roller 36 is a guide plate 3 including upper and lower guide plates 37a and 37b.
It is guided by 7 and transferred to the guide plate 25 on the main body 1 side. A cutter 37c is formed at the tip of the upper guide plate 37a.

The rewinding guide plate 38 is opened and closed by a hinge provided at its lower end (Fig. 4 is in a closed state, Fig. 5 (c)).
Shows the open state), and when the label 8 is rewound, it is prevented from escaping to the outside and is stored in the storage portion 30a.

Next, the mounting portion 40 of the cassette 30 will be described with reference to FIGS. 3, 6, and 8. First, two support rods 41, 41 are erected on the support plate 11 and protrude forward. Similarly, the guide lot 42b is provided near the gear 14, and the guide lot 42a is provided at the center of the cassette mounting plate 12. Then, when the cassette 30 is pushed toward the main body side while being supported by the support rods 41, 41, the guide hole 42a ′ provided in the label roll set shaft 33 of the cassette 30 is fitted into the guide lot 42a, and the guide lot 42b is formed. It fits in the guide hole 42b 'and the cassette 30 is mounted at a predetermined position. In this case, since the guide lot 42b is provided near the gear 14, when the cassette 30 is mounted, the gear on the main body side
The 14 and the gear 35a on the cassette side surely mesh with each other. Further, the space between the bottom plate 30c of the cassette 30 and the cassette mounting plate 12 is kept constant by the four spacers 43. Further, the legs 30f of the cassette 30 fit into the escape holes 44, 44 provided in the cassette mounting plate 12.
Further, the bottom plate 30c is attracted and fixed to the magnets 45,45. Although the cassette 30 is fixed by the magnets 45, 45 in this embodiment, a lock mechanism may be further provided so that the cassette 30 cannot be removed unless the lever is operated.

Next, the cassette type determination mechanism will be described. This distinction is made by applying the backing plate 5 fixed on the bottom plate 30c of the cassette 30.
0 (FIG. 7) is detected by the four limit switches 51a to 51d fixed to the upper bent portion of the cassette mounting plate 12. Here, the limit switches 51a to 51d
Turns on when the contact plate 50 is detected, and turns off when the contact plate 50 is not detected. Therefore, by appropriately disposing the contact plate 50, it is possible to detect whether or not the cassette 30 is attached and 15 kinds of cassettes 30. Ie all limit switches 51a
When ~ 51d is off, it detects that the cassette 30 is not installed, while the limit switch detects the cassette 30 containing 15 label types by the binary value (1-15) made by 51a-51d. To do.

Next, the electrical configuration of this embodiment will be described with reference to FIGS. 9 to 11.

In these figures, 60 is a CPU. CPU60 is ROM61
The printing of the label 8 is controlled by the program stored in. Reference numeral 62 is a RAM, which provides a work area for the CPU 60 and areas for various registers to be described later, and 63 is a communication interface for communicating with an external device.

The print control unit 70 is connected via the printer interface 71.
It is connected to the CPU60. The printer interface 71 includes limit switches 51a-5 for detecting label types.
The output signal of 1d and the output of the light receiving element 26b of the label detection sensor 26 are supplied. From the printer interface 71, a DC motor that drives the take-up reel 9
A control signal is sent to the stepping motor 13 and the stepping motor 13 and a drive signal DP is sent to the drive circuit 73 of the thermal head 23.
However, the print data DATA and the clock CP are supplied to the shift register 74 connected to the preceding stage of the drive circuit 73.

The drive circuit 73 includes an AND gate group 73a and a driver circuit 73b.
The heating elements R1 to Rn of the thermal head 23 are driven to perform dot printing. In addition, the shift register 74 is connected via the printer interface 71.
The print data DATA supplied from the CPU 60 in 8-bit units is shifted and fetched and supplied to the AND gate group 73a.

Next, the label type table 80 stored in the ROM 61 will be described with reference to FIG.

This table 80 has a length L1 in the traveling direction (hereinafter, simply referred to as label length) including a gap portion of the label 8 corresponding to each of 15 label types, as shown in FIG.
Length L2 from front end of label 8 to stop position P, label 8
Length L3 from rear end to stop position P, label detection sensor
Label feed length L4 when adjusting sensitivity of 26, thermal head
Number of labels Co located between 23 and label detection sensor 26
(In this embodiment, since the label is counted when the front end of the label 8 is detected as in the conventional case, in the case of FIG.
Co = 4) and the print format number F are stored. The lengths L1 to L4 are stored as the number of pulses of the stepping motor 13. Also, the lengths L3 and L4 are
The label detection sensor 26 is used for control when the label 8 is fed to perform the sensitivity inspection of the label detection sensor 26.
Since the sensitivity inspection process of 1 is not directly related to the present application, description thereof will be omitted.

With the above configuration, when the cassette 30 on which the label roll is set is mounted on the mounting portion 40, the limit switch 51
When a to 51d detect this, the CPU 60 controls the stepping motor 13 to rotate in the normal direction. As a result, the feeding roller 35 and the platen roller 21 are rotationally driven in conjunction with each other (see FIG. 12 (a)), and the feeding roller 35 causes the label 8 to move.
Take out. The label 8 is shown in FIGS.
As shown in FIG. 3, the sheet is transferred between the platen roller 21 and the thermal head 23 through the guide plate 25 and the label detection sensor 26.

In this case, the label transfer speed by the platen roller 21 is
It is slightly higher than the label transfer speed by the feeding roller 35. As a result, even when the label 8 is loosened between the feeding roller 35 and the platen roller 21, the label 8 can be naturally returned to the tensioned state. Also,
If the tension is excessive, the pinch roller 36 escapes in the direction away from the feeding roller 35, and this tension is eliminated. This is the reason why the bearing 36c of the shaft 36a of the pinch roller 35 has a long hole. In this way, the transfer amount of the label 8 is determined by the platen roller 21, and the predetermined amount is reliably transferred.

On the other hand, when the stepping motor 13 is rotated in the reverse direction, the platen roller 21 and the feeding roller 35 rotate in the direction shown in FIG. 3D, and the label 8 is rewound into the storage portion 30a of the cassette 30. At this time, the guide plate 38 prevents the label 8 from escaping outward (to the right in the drawing). By using this rewinding, the cassette 30
It is not necessary to waste the label 8 located between the label and the printing unit 20.

Next, the operation when the cassette 30 is attached will be described.

FIG. 13 is a general flowchart showing the outline of this operation. When the cassette 30 is loaded, the label 8 starts to be fed out after a certain period of time (step S
1). After a while, when the leading label 8 reaches the label detection sensor 26, the sensor 26 that has been at the “H” level until then
Output goes to "L" level, and when the leading label 8 passes, the output of the sensor 26 changes to "H" level again. Therefore, the length of the leading label can be measured by counting the number of pulses supplied to the stepping motor 13 during the passage of the leading label (step S2). When measuring the label length including the gap length as in the present embodiment, the front end of the leading label, that is, the time when the output of the sensor 26 changes from the “H” level to the “L” level is detected. After that, it is sufficient to count the number of pulses until the front end of the second label is detected.

In this way, if the measured length of the first label is a regular length, this label is set at the print position, but if it is not a regular length, that is, if it was cut in the middle of the label, the next label Set the second label to the print position.
This operation is steps S3 to S5. For the regular length of the label and the length to the print position, see the label type table.
The value stored in 80 is read and used. Further, the label type at this time is determined by the limit switches 51a to 51d.

Next, the details of the above operation will be described with reference to the detail flowchart of FIG.

In this flow chart, steps SP1 to 14 are the process of feeding the label, steps SP15 to 18 are the measurement of the label length, step SP19 is a check whether the leading label length is normal, and steps SP13 and 20 to 22 are the label printing positions. The operation to stop is shown.

First, in step SP1, limit switches 51a-51
It is checked whether all d are off, and when all are off, the area 5a of the display unit 5 displays "No cassette is set". On the other hand, if even one limit switch 51a to 51d is on, the CPU 60 determines the label type from these on patterns (step
SP3). The CPU 60 searches the label type table 80 using this type as a key, and the numerical value L1 corresponding to the attached label is set.
~ L4, Co, print format number F is read out and RAM6
2. Stored in the register secured above (step SP4).

After the above preparations are completed, the CPU 60 sets a timer for 3 seconds (step SP5), and the area 5a of the display unit 5 indicates "The cassette has been set. Feeding will start in 3 seconds."
Is displayed (step SP6). Then, after 3 seconds have elapsed (step SP7), constants are set in the counters SP, LC and PC on the RAM 62. Where counter (stop counter)
SP counts the feed amount in order to stop the feed when the feed of the label 8 exceeds a certain amount, and each time one pulse is supplied to the stepping motor 13,
The initial value PMAX (for example, 4000 steps) is down-counted by one. If the feeding process does not stop even after 4000 steps have been counted, it is determined that a level defect of the label detection sensor 26, a label jam, or the like has occurred, and an abnormality is displayed (step SP23).

The counter (label counter) LC counts the number of labels that have passed through the label detection sensor 26, that is, the number of times the label front end is detected. The counter (pulse counter) PC detects stepping after detecting the label end. It counts the number of pulses supplied to the motor 13, and both are set to an initial value 0 (step SP
8).

Then, in step SP9, after displaying "label feeding in progress", the stepping motor 13 is stepped up by one pulse in the loop of steps SP10 to 17, and the label 8 is fed.

First, in step SP10, the stepping motor 13 is stepped one step, then in step SP11, the stop counter SP is down-counted and the pulse counter PC
Upcount. Then, the stop counter SP is not zero (step SP12), and the pulse counter PC is
If it is not L2 (step SP13), the label detection sensor 26
Drives the stepping motor 13 until the label 8 detects the label 8 (step SP14) (step SP14).
SP10-14).

When the label 8 reaches the label detection sensor 26 and is detected (step SP14), the label counter LC is incremented by 1 (step SP15), and it is checked at step SP16 whether the label counter LC is 2 or not. If it is not 2 (it is 1 at this time), "0" is set to the pulse counter PC (step SP17), and the process returns to step SP10. With this, the preparation for measuring the length of the first label is completed.

If the value of the label counter LC is 2, it means that the leading edge of the second label has been detected. That is, the pulse counter PC contains the length of the first label as a count value. . However, this label length includes the interval between labels. When the label length is detected, the value of the pulse counter PC is stored in the label length register L and the pulse counter PC is cleared (step SP1
8) At step SP19, it is checked whether or not the value L of the label length register L is within the range of the regular label length L1 ± α (where α is a constant small value).

If the label length L at the beginning is within the normal range,
Return from step SP19 to step SP10 and continue feeding. Then, when the value of the pulse counter PC reaches the length L2 to the printing position, the process moves from step SP13 to step SP21, and the value of the label counter LC, that is, the number of labels passing through the label detection sensor 26 (label front end detection It is checked whether the number of times has reached the value Co shown in FIG. 11 (a). In the case of LC = Co, "Label feed completed" is displayed in step SP22, and the feeding process ends. On the other hand, LC ≠
When it is Co, the control is shifted to step SP14 to continue the feeding.

In the above step SP19, if the leading label is not within the range of the regular label length, that is, if the leading label is cut, the value Co is set to 1 in order to stop the second label at the printing position. Up (step SP20),
The process returns to step SP10 and the same processing as above is performed. As a result, the second label stops at the print position.

The above is the operation when the cassette 30 is attached. On the other hand, rewinding is performed by cutting the label 8 on which printing has been issued by the cutter 28 and then pressing the rewinding switch 7b. When the switch 7b is pressed, the stepping motor 13 is reversely rotated by a certain amount, and the label 8 can be rewound to the delivery port of the cassette 30 (see FIG. 12 (d)).

The above is the main operation of this embodiment. According to this embodiment, the following effects can be obtained.

Since the cassette 30 does not include the components of the printing unit 20 such as the platen roller 21, the printing unit 20 and the label feeding unit 30b are completely separate. As a result, the inconvenience that the print quality depends on the mounting state of the cassette 30 is eliminated, and stable print quality can be obtained.

When the cassette 30 is attached, the leading label is automatically transferred to a predetermined print position regardless of the type of label built in, and the label can be printed. As a result, the label replacement work becomes extremely easy.

Since the feeding roller 35 and the platen roller 21 are interlocked with each other, the label 8 can be rewound. As a result, the label cut on the outside of the printing unit 20 will not be rewound by the rewind switch 7b.
As a result, the cassette 30 can be rewound into the storage portion 30a, and the label 8 can be prevented from being wasted when the label is replaced.

Compared with the conventional one in which the platen roller is built in the cassette 30, the degree of freedom in design is increased and the amount of labels that can be stored is also increased. That is, in the conventional cassette,
Since the structure is such that the platen roller is pressed against the thermal head mounted outside the cassette, there are restrictions on the mounting position of the platen roller, which hinders the degree of freedom in design in terms of space. In this embodiment, since the platen roller 21 is placed outside the cassette 30, there is no such restriction.

If the first label fed out was cut midway, the next label is automatically set at the print position.When loading the cassette, check whether the first label was cut midway. , You don't need to check each one.

When the label detection sensor 26 is obstructed or a paper jam occurs and the feed does not stop, the feed is forcibly stopped, and thus unnecessary feed can be stopped to a minimum.

In this embodiment, the following modified examples are possible.

(1) In the present embodiment, the label 8 is continuously wound without being peeled off from the mount, but the present invention is not limited to this, and the label printer is also applied to a label printer configured to peel the label one by one from the mount at the same time. can do. In this case, the label and the mount may be transferred by a feed roller provided outside the thermal head.

(2) In this embodiment, the length from the front end of one label to the front end of the next label is measured as the label length, but the length from the front end to the rear end of the label, that is,
The actual label length not including the label interval may be detected. Further, although the label is stopped at the print position based on the front end of the label, it may be stopped at the print position based on the rear end of the label. As described above, when the label is detected at the rear end of the label, it is necessary to detect the front end and the rear end when measuring the label length at the beginning, which is convenient for detecting label breakage. This is because if the label is not out, the next label should come at a short interval, and if not, it can be immediately determined that the label is out.

(3) In the present embodiment, the label type is detected by the limit switch, but it is also possible to detect it by detecting the length of the label or the mark attached to the label.

[Effects of the Invention] As described above, the present invention stores a label roll and has a cassette having a feeding roller for feeding the label, a mounting portion for mounting the cassette on the label printer body side, and the label printer body. A platen roller that is disposed on the side and that transports the label fed from the cassette by the feeding roller in a state where the cassette is mounted, and a driving unit that drives the platen roller and the feeding roller while interlocking them.
Printing means for printing on the label while sandwiching the label transported by the platen roller together with the platen roller, wherein the driving means feeds the label while interlocking the platen roller and the feeding roller. By driving in the direction opposite to the direction, the fed label has a function of rewinding the fed label inside the cassette, so that the following effects can be obtained.

Since the cassette does not include a printing section component such as a platen roller, the printing section and the cassette are completely separate. As a result, the inconvenience that the print quality depends on the mounting state of the cassette is eliminated, and stable print quality can be obtained.

The degree of freedom in design is increased and the amount of labels that can be stored is increased compared to the conventional one in which the platen roller is built in the cassette. That is, in the conventional cassette, since the platen roller is pressed against the thermal head mounted outside the cassette, the mounting position of the platen roller is limited, and the degree of freedom in design is hindered in terms of space. . In the present invention, since the platen roller is provided outside the cassette, there is no such restriction.

Since the feeding roller and the platen roller work together,
The label can be rewound. As a result, the label cut outside the printing unit can be rewound inside the cassette, and the label can be prevented from being wasted when the label is replaced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an external configuration of a label printer according to an embodiment of the present invention, FIG. 2 is a front view showing the configuration of a display section, an operating section and a switch section of the label printer, and FIG.
FIG. 4 is a side view showing a state before mounting the cassette 30 of the label printer, FIG. 4 is a side view showing a state after mounting the cassette 30 of the label printer, and FIG. 5 is a view showing a configuration of the cassette 30. Figure (a) is a front view, (b) is a side view, (c) is a front view showing the inside, and Figures 6 to 8 are views showing the state when the cassette 30 is mounted. FIG. 7 is a side sectional view, FIG. 7 is a plan view, FIG. 8 is a plan sectional view, FIG. 9 is a block diagram showing an electrical configuration of the label printer, and FIG. 10 is a print controller.
Block diagram showing the configuration of 70, FIG. 11 is a conceptual diagram for explaining the configuration of the label type table and the meaning of each numerical value,
FIG. 14 is a diagram for explaining feeding and rewinding of labels, FIG. 13 is a general flowchart for explaining the operation of the label printer when the cassette is mounted, and FIG. 14 is a detail flowchart for explaining the same operation. Is. 1 ... Label printer body, 8 ... Label, 13 ... Stepping motor, 20 ... Printing section, 21 ... Platen roller, 30 ... Cassette, 35 ... Feed roller, 40 ... Mounting section.

Claims (1)

[Claims] 1. A cassette having a feeding roller for feeding a label roll and feeding a label, a mounting portion for mounting the cassette on a label printer main body side, and a mounting portion arranged on the label printer main body side for mounting the cassette. The platen roller that moves the label fed from the cassette by the feeding roller, a driving unit that drives the platen roller and the feeding roller while interlocking them, and a label that is fed by the platen roller. A printing unit that prints on the label while sandwiching the platen roller with pressure; and the driving unit drives the platen roller and the feeding roller in a direction opposite to the feeding direction of the label by interlocking the platen roller and the feeding roller. , The label that has been fed out is Cassette label printer characterized by having a rewind function therein.