JPS63127658A - Manual scanning type printing device - Google Patents

Abstract

PURPOSE:To attain the print to an optional printing object while avoiding the deterioration in the print quality attended with the slack of a recording medium by suppressing the slack of the recording medium effectively at non-print state. CONSTITUTION:A brake means 30 restricting the drawing of an ink doner film 11 from a supply roll 12 at the progress of a print head 4 and a reverse block means 40 blocking the reversing of a winding roll 13 are provided. A printing head 4 is arranged to a progressing position S1 by the energizing force of an energizing spring 5 at non-print state. Then a nip roll 32 constituting the brake means 30 is progressed and moved together with the print head 4 and clips the ink doner film 11 together with a reception member 31. Then in applying printing and scanning by the device, the device is moved manually while pressing the device onto the recording paper 50 to print out the print data onto the recording paper 50.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a manual scanning type printing device that prints print information by manual scanning, and is particularly applicable to a type having an indirect transfer type printing mechanism. This invention relates to a manual scanning printing device with an improved recording medium supply system.

[Prior Art] As a conventional manual scanning type printing device, one is known in which a print head is appropriately driven according to print information, and a roll of thermal paper is sequentially pulled out and colored according to the print information. ing.

[Problems to be Solved by the Invention] However, with such conventional manual scanning printing devices, the printing target is limited to thermal paper. A problem arises in that it is not possible to print.

As a means to solve such problems, a print mechanism is configured with a print head and a recording medium supply system that supplies the recording medium along the printing surface of the print head, and information from the print head is transferred to the recording medium. It is conceivable to print on an arbitrary printing target via the printer. In this type, the recording medium supply system includes an ink donor film as a recording medium, a supply roll that wraps and holds the ink donor film so that it can be pulled out, and an ink donor film that is rotated in a predetermined direction and pulled out when the device is moved. Usually, the ink donor film is made up of a take-up roll that winds up the ink donor film, but since the ink donor film is extremely thin (approximately 10 μm) compared to the thermal paper, its stiffness is weak and it tends to loosen and wrinkle. This results in a problem of deterioration of print quality.

More specifically, in order to maintain good contact between the print surface of the print head and the ink donor film,
A support structure is adopted that biases the print head toward the ink donor film, so if the device itself is suddenly lifted away from the printing target at the end of manual scanning, the print head will move rapidly and the supply roll will shift accordingly. This causes the ink donor film to rotate more than necessary, causing the ink donor film to become loose.

In addition, immediately after printing is completed, the ink donor film is fused to the printing target side due to the heat of the print head, and if the device itself is lifted immediately after printing is completed, the ink donor film may loosen.

[Means for Solving the Problems] This invention has been made by focusing on the above problems, and is based on a type having an indirect transfer type printing mechanism.
To provide a manual scanning type printing device that can effectively suppress slack in a recording medium and maintain good printing quality.

That is, the present invention includes a print head that can move forward and backward and is appropriately biased in the advancing direction, a recording medium supply system that supplies a recording medium along the printing surface of the print head, and a memory that stores print data. , a scanning speed detecting means for detecting a manual scanning speed, and a drive 'a for reading print data from a memory according to the scanning speed detected by the scanning speed detecting means and driving the print head based on this print data.
tm means is housed in a housing, and the housing is manually moved to transfer information from a print head onto a printing target via a recording medium, the manual scanning type printing bag JA comprising: The recording medium supply system includes a recording medium, a supply roll that wraps and holds the recording medium so that it can be pulled out, a take-up roll that rotates in a predetermined direction when the housing moves and winds up the pulled-out recording medium, and the supply roll. a brake means disposed on the side for suppressing pulling out of the recording medium from the supply roll when the print head advances;
A reverse rotation prevention means is provided on the side of the take-up roll and blocks reverse rotation of the take-up roll.

In such technical means, the design of the housing may be changed as appropriate as long as it has space for arranging each means necessary for printing operation and can be moved smoothly during manual scanning. In addition, as the above-mentioned print head, as long as it can print on the printing target surface via the recording medium, a thermal print head or a wire dot type print head may be selected as appropriate, but it is necessary to maintain good transfer efficiency. From this point of view, it is necessary to bias the print head toward the recording medium in order to ensure the contact between the printing surface of the print head and the recording medium.

Furthermore, although the capacity of the above-mentioned memory can be selected as appropriate, if it is set to a certain amount, it is possible to configure it with an internal power supply so that the printing device can be disconnected from the processing device once the printing data has been stored. It is also possible to separate the printing device and operate it independently. Further, regarding the print data to be stored in the memory, a document reading device may be provided in the same housing, and the document data read by the document reading device may be treated as print data. Furthermore, the detection method of the scanning speed detection means may be selected as appropriate, but it is preferable to design the scanning speed detection means so that the detection operation is performed only during the period when manual scanning is actually performed. Further, regarding the drive control means, a microcomputer may be made to perform a predetermined functional operation, or a controller may be configured for each functional operation.

Further, as the above-mentioned recording medium, known ones such as those coated with heat-melting ink or heat-sublimable ink can be used. Further, even in the case of a single supply system, it is sufficient to have at least a recording medium supply roll and a take-up roll for the recording medium, and the take-up roll may be driven during manual scanning. In this case, the drive source for the take-up roll may be one that transmits and converts the amount of movement during manual scanning, or may be provided with its own drive means. Furthermore, in consideration of the workability of replacing the recording medium, it is desirable to form the basic components of the recording medium supply system into cassettes so that each cassette can be replaced.

Further, the brake means may be designed with appropriate modifications as long as it can restrict the withdrawal of the recording medium from the supply roll during non-printing.

Furthermore, the design of the reversal prevention means may be changed as appropriate as long as it can restrict the rewinding of the recording medium taken up by the take-up roll.

[Function] According to the above-mentioned technical means, since the print head is normally placed in the advanced position when not printing, the brake means regulates the withdrawal of the recording medium from the supply roll, and the above-mentioned The reversal prevention means restricts the rewinding of the recording medium from the take-up roll, thereby suppressing unnecessary slack in the recording medium.

Furthermore, if manual scanning is performed by pressing the print head against the side to be printed during printing, the print head will retreat from the non-printing position, and the brake means will not work, causing the drive rotation of the take-up roll to The recording medium is sequentially pulled out from the supply roll, and print data information from the print head is transferred to the surface to be printed via the recording medium.

[Embodiments] Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a housing in which various means necessary for printing are incorporated, which has a recess 2 for inserting a cassette at its lower end, and a plurality of running rollers in locations other than the recess 2 for inserting a cassette. 3 is arranged so that it can move along a predetermined direction.

Reference numeral 4 denotes a heat-sensitive print head which is disposed on the lower end side of the housing 1 so as to be movable forward and backward, and is composed of a head body 4a and a cover 4b provided on the head body 4at.
It is biased toward the printing target side by a biasing spring 5. Further, reference numeral 6 is a scanning speed detection means for detecting the moving speed of the housing 1 during manual scanning,
A transmission member 7 consisting of one of the above-mentioned running rollers 3, a belt and a boot that transmits the rotation of the running roller 3, and an encoder that outputs a signal indicating the position of the housing 1 based on the rotation speed of the running roller 3. It consists of 8. Furthermore, 9 is a memory stored in the housing 1, and 10 stores print data from an external processing device in the memory 9, and also stores print data from the memory 9 based on the scanning speed information from the scanning speed detection means 6. Read the print data,
This is a drive control means that drives the print head 4 according to this print data.

Further, in this embodiment, a recording medium supply system Δ for transferring information from the print head 4 onto the surface to be printed is housed within the housing 1.

The basic configuration of this recording medium supply system A is as follows: an ink donor film 11 as a recording medium, a supply roll 12 on which the ink donor film 11 is wound and held in advance and drawn out sequentially, and a supply roll 12 on which the ink donor film 11 is drawn out. It is equipped with a take-up roll 13 that winds up one after another, and a guide roll 14 (specifically 14a 114b) that guides and regulates the ink donor film 11 located between the supply roll 12 and the take-up roll 13, and these rolls are connected to the cassette 15.
It is pre-installed inside. Positioning protrusions (not shown) are formed on both sides of the cassette 15, and the cassette 15 is inserted and locked in the cassette insertion recess 2 of the housing 1 so as to be removable. In this embodiment, a slit 16 is provided in the center of the cassette 15, and the print head 4 passes through the slit 16.
are arranged so that they can move forward and backward. In addition, the above supply roll 1
A braking spring 17 is fitted into the support shaft 12a of No. 2,
The biasing force of the braking spring 11 prevents the supply roll 12 from rotating excessively in the direction in which the ink donor film 11 is drawn out. Furthermore, a driving force transmission mechanism 18 is attached to the winding roll 13, and this driving force transmission mechanism 18
A transmission member 19 such as a belt or a boob that transmits the rotation of the running roller 3, a drive side gear 20 provided coaxially with the boob on the side to which the rotation is transmitted, and a scraping roll 13 shown in F.
The driven gear 21 is provided coaxially with the support shaft of the drive gear 20 and meshes with the drive gear 20.

In this embodiment, the -F recording medium supply system A includes a brake means 30 for regulating the withdrawal of the ink donor film 11 from the supply roll 12 when the print head 4 advances.
and a reversal prevention means 40 that prevents the take-up roll 13 from reversing. The brake means 30 is connected to one of the guides [a receiving member 31 which also serves as a call 14a].
and a nip roll 32 fixedly provided on the cover 4b of the print head 4. When the print head 4 is placed in the advanced position, the ink donor film 11 is inserted between the receiving member 31 and the nip roll 32. It is designed to hold the Further, the reverse rotation prevention means 40 is composed of a so-called ratchet wheel device, and includes a sawtooth-shaped ratchet 41 provided coaxially with the driven side gear 21 and a fulcrum outside the ratchet 41. It is composed of a plate spring 42 that comes into elastic contact with the circumferential surface.

Therefore, according to the manual scanning type printing apparatus according to this embodiment, when not printing, the print head 4 is placed at the advanced position S1 by the biasing force of the biasing spring 5, as shown in FIG. At this time, the nip roll 32 constituting the brake means 30 moves forward together with the print head 4, and clamps the ink donor film 11 together with the receiving member 31.

On the other hand, since the distal end edge of the leaf spring 42 of the reverse rotation prevention means 40 is locked to the locking portion 41a of the ratchet 41, the rotational movement of the winding roll 13 in the reverse direction is prevented. Therefore, the brake means 30 restrains the withdrawal of the ink donor film 11 from the supply roll 12, and the reversal prevention means 40 restrains the withdrawal of the ink donor film 11 from the take-up roll 12.
The unwinding of the ink donor film 11 from the position 3 is restrained, and the slack of the ink donor film 11 is effectively suppressed by the cooperative action of the two.

On the other hand, when performing print scanning with the above device, the device may be manually moved while being pressed onto the recording paper 50 as the printing target, and print data may be printed on the recording paper 50. At this time, as shown in FIG. 4, the print head 4 is pressed against the recording paper 50 and moves backward to position 82 against the urging force of the urging spring 5, so that the print head 4 follows the movement of the print head 4. Then, the nip roll 32 serving as the brake means 30 moves backward. Therefore, the bone is released from the nipping operation of the ink donor film 11 by the member 31, the nip roll 32, etc., and the ink donor film 1 from the supply roll 12 is released.
The withdrawal operation of No. 1 is performed freely. In this case as well, the one means 40 for reversing is the valley removing roll 1.
It is in a state where the reverse rotation of 3 is effectively closed and the rotation is 1η. In this state, when the housing 1 is moved,
The winding roll 1 is connected to the winding roll 1 via the driving force transmission mechanism 18
3 is rotationally driven, and as a result, the ink donor film 11 is sequentially pulled out from the supply roll 12 and wound onto the take-up roll 12, while the scanning speed detection means 6
detects the moving speed of the housing 1, and based on this detected information, the drive control means 10 reads print data from the memory 9 and drives the print head 4. Therefore, information from the driven print head 4 is transferred onto the recording paper 50 via the ink donor film 11.

If the housing 1 is lifted immediately after the printing operation is completed, the ink donor film 11 may be pushed out due to the vigorous movement of the print head 4, or the ink donor film 11 may be heated and may be damaged by the recording paper 50. However, since the print head 4 is immediately set to the selected position S1, the brake means 30 is immediately activated as described above, and the ink donor film 11 is reliably drawn out from the supply roll 12. The slack of the ink donor film 11 is effectively suppressed.

[Effects of the Invention] As described above, the manual scanning printing device according to the present invention is of the type that has a printing mechanism consisting of a print head and a recording medium supply system, and is capable of reducing the slack of the recording medium when not printing. Since the present invention is configured to effectively suppress the problem, it is possible to print on any desired printing target while avoiding poor print quality caused by slack in the recording medium.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram showing an embodiment of a manual scanning type printing device according to the present invention, FIG. 2 is a perspective view showing a specific example of a recording medium supply system used in the embodiment, and FIGS. The figures are explanatory diagrams showing states of the manual scanning type printing device according to the embodiment during non-printing and during printing, respectively. (A)...Recording medium supply system (1)...Housing (4)...Print head (5)...Biasing spring (6)...Scanning speed detection means (9)... Memory (10)... Drive control means (11)... Ink donor film (recording medium) (1
2)... Supply roll (13)... Winding roll (30)... Brake means (31)... Receiving member (32)... Nip roll (40)... Reverse rotation prevention means (41 )... Ratchet (42)... Leaf spring patent applicant Fuji Xerox Co., Ltd. Agent
Patent attorney Tomohiro Nakamura (2 others) Exhibit A Seventh Form Exhibition Figure 3 4a Figure 4

Claims (1)

[Claims] 1) A print head that is appropriately biased in the advance direction and can move forward and backward, a recording medium supply system that supplies a recording medium along the printing surface of the print head, and stores print data. a memory, a scanning speed detection means for detecting a manual scanning speed, and a drive control for reading print data from the memory according to the scanning speed detected by the scanning speed detection means and driving the print head based on this print data. In the manual scanning printing device, the recording medium supply system is configured to house a means in a housing, and manually move the housing to transfer information from the print head onto a printing target via a recording medium. , a recording medium, a supply roll that wraps and holds the recording medium so that it can be pulled out, a take-up roll that rotates in a predetermined direction when the housing moves and winds up the pulled-out recording medium, and a take-up roll that is disposed on the supply roll side. It is characterized by comprising a brake means for suppressing the withdrawal of the recording medium from the supply roll when the print head advances, and a reverse rotation prevention means disposed on the take-up roll side to prevent the reversal operation of the take-up roll. Manual scanning printing device. 2) The brake means includes a receiving member disposed along the moving path of the recording medium, and a nip member fixed to the print head to sandwich the recording medium between the receiving member and the receiving member when the print head advances. A manual scanning type printing device according to claim 1, characterized in that it is comprised of: 3) The reversal prevention means includes a sawtooth ratchet provided coaxially with the winding roll, and a leaf spring-like pawl member having a fulcrum outside the ratchet and elastically contacting the peripheral surface of the ratchet. The manual scanning type printing device according to claim 1, characterized in that it is a ratchet wheel device.