CN110525062B - Automatic printhead position adjusting structure and printer - Google Patents
Automatic printhead position adjusting structure and printer Download PDFInfo
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- CN110525062B CN110525062B CN201910890736.3A CN201910890736A CN110525062B CN 110525062 B CN110525062 B CN 110525062B CN 201910890736 A CN201910890736 A CN 201910890736A CN 110525062 B CN110525062 B CN 110525062B
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- 238000007639 printing Methods 0.000 claims abstract description 75
- 230000005540 biological transmission Effects 0.000 claims abstract description 55
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- 230000003028 elevating effect Effects 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000001174 ascending effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000004836 Glue Stick Substances 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000010023 transfer printing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J25/00—Actions or mechanisms not otherwise provided for
- B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
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Abstract
The invention discloses an automatic printing head position adjusting structure and a printer, wherein the automatic printing head position adjusting structure comprises a power component, an execution component and a transmission component, the power component is used for providing power, the execution component is used for driving a printing head to carry out position adjustment, the transmission component is used for transmitting the power of the power component to the execution component, the execution component comprises a lifting component, when printing, the transmission component converts the power output by the power component into the lifting motion of the lifting component, and the printing head drives the printing head to lift or rotate through the lifting motion. And the lifting component can be adjusted to any height, so that the printing head can be adjusted to any position in the stroke range, and the printing effect can be improved.
Description
Technical Field
The invention belongs to the technical field of printers, and particularly relates to an automatic position adjusting structure of a printing head and a printer.
Background
The label printer generally adopts a thermal transfer printing mode to realize printing of labels, and as different types of labels may have differences in thickness, material quality and the like, the printing effect of various labels by the printing heads at the same position is different, in order to improve the printing effect, the printing pressure, the temperature and the like of the printing heads need to be adjusted according to the attribute (thickness, material quality and the like) of the labels, and when the pressure of the printing heads is adjusted, the mode of changing the positions of the printing heads is generally adopted. For example, some label printers are provided with a manual knob for adjusting the position of the printing head, and after the printer determines the thickness and the material of the label to be printed according to experience, the printer manually adjusts the knob to change the position of the printing head; in still other label printers, the properties (thickness, material, etc.) of the label to be printed may be automatically read prior to printing by means of radio frequency identification (Radio Frequency Identification, RFID), etc., and the printer may manually adjust the printhead position based on the read label properties. While existing label printers have been able to achieve adjustment of the printhead position, on the one hand, manual adjustment is inefficient, and on the other hand, labels are of a wide variety, but have limited adjustable gear, and some labels are not adjustable to an optimal position when printed.
Disclosure of Invention
The invention mainly aims to provide an automatic position adjusting structure of a printing head and a printer, so as to improve the printing effect and the printing efficiency.
To achieve the above object and other related objects, the present invention provides the following technical solutions:
a printhead position automatic adjustment structure, comprising:
a power assembly for outputting rotational power;
the execution assembly is used for driving the printing head to carry out position adjustment; the execution assembly comprises a lifting assembly;
a transmission assembly for converting rotational power of the power assembly into elevating movement of the elevating assembly;
the printer comprises a printing head, an executing assembly and a resetting elastic piece, wherein the printing head is arranged on the printer in a lifting or rotating mode, the printing head is connected with the executing assembly or the executing assembly is propped against the printing head, the printer is provided with the resetting elastic piece which is used for driving the printing head to move towards the direction where the executing assembly is located, when the lifting assembly is used for descending, the executing assembly pushes the printing head to descend or rotate downwards, and when the lifting assembly is used for ascending, the resetting elastic piece pushes the printing head to ascend to reset or rotate upwards to reset.
Optionally, the transmission assembly includes a cam, the cam rotates under the drive of the power assembly, wherein, be provided with on the lifting assembly and be used for supporting the position of leaning on the cam profile, be provided with on the printer and be used for making the lifting assembly support the reset elastic component on the cam profile, the cam drives through the rotation lifting assembly goes up and down.
Optionally, the cam is an end cam.
Optionally, the transmission assembly further includes a driving gear, the driving gear rotates under the driving of the power assembly, the cam is a disc cam, and a meshing tooth part for meshing with the driving gear is arranged on the cam, so that the cam rotates under the driving of the driving gear.
Optionally, the transmission assembly further includes a driving wheel, the driving wheel rotates under the driving of the power assembly, the cam is a disc cam, and a driven part for forming a belt transmission assembly or a chain transmission structure with the driving wheel is arranged on the cam, so that the cam rotates under the driving of the driving wheel.
Optionally, the transmission subassembly is including the cover establish the outer rotating member of lifting unit and be used for preventing the gyration structure is prevented in lifting unit gyration, the rotating member is in the effect of power module is rotatory, the rotating member with be provided with the screw thread pair between the lifting unit.
Optionally, the transmission assembly further comprises a worm, the worm is connected with the power assembly, worm gear teeth matched with the worm are arranged on the rotating member, and the axis of the worm is perpendicular to the axis of the rotating member.
Optionally, the automatic adjusting structure further comprises a mounting seat arranged on the printer, a guide hole for guiding the lifting assembly is arranged on the mounting seat, the anti-rotation structure comprises an anti-rotation guide groove and an anti-rotation protrusion which is slidably arranged in the anti-rotation guide groove, and the anti-rotation guide groove is a vertical guide groove consistent with the lifting direction of the lifting assembly;
the anti-rotation guide groove is formed in the inner wall of the guide hole, and the anti-rotation protrusion is arranged on the lifting assembly; or the anti-rotation guide groove is formed on the lifting assembly, and the anti-rotation protrusion is arranged on the inner wall of the guide hole.
Optionally, the execution assembly includes lift power input shaft and lift power output shaft, lift power input shaft and lift power output shaft coaxial arrangement, lift power output shaft with be provided with first elastic component between the print head, make the bottom of lift power input shaft with the top of lift power output shaft offsets.
Optionally, a groove is formed in the top of the lifting power output shaft, and the bottom of the lifting power input shaft is embedded into the groove; or the bottom of the lifting power input shaft is provided with a groove, and the top of the lifting power output shaft is embedded into the groove.
Optionally, the automatic printhead position adjusting structure further comprises a top cover detachably arranged on the mounting seat, the rotary member comprises a central sleeve and a rotary disc integrally arranged on the periphery of the central sleeve, the worm gear teeth are arranged on the outer edge of the rotary disc, a limiting surface for positioning the axial position of the rotary disc is arranged on the mounting seat, a pressing part for pressing the rotary disc on the limiting surface is arranged on the top cover, and an annular elastic sheet is arranged between the pressing part and the rotary disc.
Optionally, the guiding hole extends to the bottom surface of rotary disk, makes the drill way periphery of guiding hole forms the spacing face, the center sleeve stretches into in the guiding hole, be provided with in the center sleeve be used for with lift power input shaft passes through screw thread complex screw thread portion, lift power input shaft runs through the center sleeve with the top cap.
Optionally, the automatic printhead position adjustment structure further includes a position sensor for detecting a lifting position of the printhead.
Optionally, each group of the power components corresponds to a group of transmission components, each group of the execution components corresponds to a group of transmission components, and the number of the transmission components is at least two, so that at least two contact positions exist between the execution components and the printing head, and the contact positions are distributed along the paper width direction corresponding to the printing head.
Optionally, each group of the power components corresponds to a group of transmission components, the executing components correspond to at least one group of transmission components, the number of the transmission components is at least two, so that at least two contact positions exist between the executing components and the transmission components, and each contact position is distributed along the paper width direction corresponding to the printing head;
optionally, the power assembly, the transmission assembly and the execution assembly are all a group.
The invention also provides a label printer which comprises a printing head and any automatic printing head position adjusting structure.
The driving component of the printing head position adjusting structure converts the power of the power component into the lifting motion of the lifting component, and the lifting component drives the printing head to lift or rotate through the lifting motion, so that the automatic adjustment of the position of the printing head can be realized, and the printing efficiency is improved; and the lifting component can be adjusted to any height, so that the printing head can be adjusted to any position in the stroke range, and the printing effect can be improved.
Drawings
FIG. 1 is a schematic three-dimensional view of an exemplary printhead position adjustment structure of the present invention;
FIG. 2 is a schematic view of the printhead position adjustment structure of FIG. 1 with the printhead mount cap removed;
FIG. 3 is a schematic view of the structure of FIG. 2 with the top cover removed;
FIG. 4 is a schematic view of the mounting base of FIG. 2;
FIG. 5 is a schematic view of a partial internal structure of the printhead position adjustment structure of FIG. 2 with the top cover removed;
FIG. 6 is a schematic view of the lifting power take-off shaft of FIG. 5;
FIG. 7 illustrates another exemplary three-dimensional structure of a printhead position adjustment structure of the present invention;
FIG. 8 is a schematic view of the printhead position adjustment structure of FIG. 7 with the printhead mount removed;
FIG. 9 is a schematic view in partial cross-section of FIG. 8;
FIG. 10 illustrates yet another exemplary three-dimensional structure of a printhead position adjustment structure of the present invention;
FIG. 11 is a schematic view of the printhead position adjustment structure of FIG. 10 with the mounting block and printhead mounting block removed;
FIG. 12 is a schematic view in partial cross-section of FIG. 11;
FIG. 13 illustrates yet another exemplary three-dimensional structure of a printhead position adjustment structure of the present invention;
FIG. 14 is a schematic view of the printhead position adjustment structure of FIG. 13 with the mounting block and printhead mounting block removed;
FIG. 15 is a schematic view in partial cross-section of FIG. 13;
fig. 16 is a schematic view showing the internal structure of the medium drive assembly of the printhead position adjusting structure according to the present invention when the medium drive assembly adopts the belt drive system.
FIG. 17 is a schematic diagram of an exemplary configuration of a mounting block;
fig. 18 shows another exemplary structural schematic of the mount.
The reference numerals in the embodiments include:
the printing head comprises a power assembly 1, a transmission assembly 2, an execution assembly 3, a mounting seat 4, a printing head 5, a position sensor 6, a top cover 7 and a printing head mounting seat 8;
cam 21, profile surface 211, meshing teeth 212, driving gear 22, rotary member 23, center sleeve 231, threaded portion 231a, rotary disc 232, worm gear teeth 232a, worm 24, annular spring 25, and driving wheel 26;
the lifting assembly 31, the first elastic member 32, the lifting power input shaft 311, the lifting power output shaft 312, the rotation preventing protrusions 312a, the reflecting portion 312b;
a guide hole 41, an anti-rotation guide groove 42, a limit surface 43, and a reflection part guide groove 44;
a sliding portion 51 and a rotating shaft 52;
a pressing portion 71;
a sliding groove 81 and a shaft hole 82.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the invention.
It should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, like numbers refer to like elements throughout.
The automatic adjustment structure of each embodiment described below is applied to a label printer, which includes a print head and the automatic adjustment structure of the print head position of each embodiment described below. Of course, in practical implementation, the automatic printhead position adjustment structure is not limited to a label printer, and may be applied to other types of printers.
In some embodiments, referring to fig. 1-18 in combination, the printhead position automatic adjustment structure includes:
a power assembly 1 for outputting rotational power;
the execution assembly 3 is used for driving the printing head 5 to carry out position adjustment, and the execution assembly 3 comprises a lifting assembly 31;
a transmission assembly 1 for converting rotational power of the power assembly 1 into elevating movement of the elevating assembly 31;
the print head is arranged on the printer in a lifting or rotating way, the print head is connected with the execution assembly or the execution assembly is abutted against the print head, and a reset elastic piece (not shown) for driving the print head to move towards the direction of the execution assembly is arranged on the printer, so that when the lifting assembly is used for descending, the execution assembly pushes the print head to descend or rotate downwards, and when the lifting assembly 31 is used for ascending, the reset elastic piece pushes the print head to ascend for reset or rotate upwards for reset.
Referring to fig. 13, 14, 15 and 16, the printhead 5 is arranged on the printer in a liftable manner, a printhead mounting seat 8 can be arranged on the printer, a sliding part 51 is arranged on the printhead 5, a sliding groove 81 consistent with the lifting direction of the lifting assembly 31 is arranged on the printhead mounting seat 8, the sliding part 51 is slidably arranged in the sliding groove, the executing assembly 3 comprises a first elastic piece 32, the first elastic piece 31 is connected between the printhead 5 and the lifting assembly 31, when the lifting assembly 31 descends, the first elastic piece 32 can push the printhead 5 to descend, otherwise, when the lifting assembly 31 ascends, the reset elastic piece drives the printhead to ascend and reset, and the position adjustment of the printhead is realized. Of course, in practical implementation, referring to fig. 7, 8, 9, the first elastic member 31 may not be connected to the print head 5, but directly push the print head 5 downward against the print head 5. The first elastic member may be a compression spring, a rubber member, etc., and the provision of the first elastic member is advantageous in improving the quality of the printhead.
For another example, referring to fig. 1 to 6 and 10 to 12, the printhead 5 is rotatably disposed on the printer, a printhead mount 8 may be disposed on the printer, a rotating shaft 52 is disposed on the printhead 5, a shaft hole 82 is disposed on the printhead mount 8, the rotating shaft 52 is inserted into the shaft hole 82, the actuator assembly 3 includes a first elastic member 32 disposed on the lifting assembly 1 and abutting against the printhead 5, such that when the lifting assembly 31 is downward, the first elastic member 32 compresses and pushes the printhead 5 to rotate downward, and otherwise, when the lifting assembly is upward, the reset elastic member pushes the printhead 5 to rotate downward for reset. In an actual implementation process, a link (not shown) may be disposed between the lifting assembly 31 and the print head 5, so that when the lifting assembly 31 lifts, the print head 5 rotates upwards or downwards under the driving of the link.
In the above embodiments, the reset elastic member may be a glue stick, a spring, or the like, as long as the elastic force for resetting the print head 5 can be provided, and the power assembly 1 may be an electric motor. In the above embodiments and the embodiments described below, the upward, downward, upward rotation, and downward rotation are indicated in two opposite directions, and are not merely absolute upward and downward directions.
In some embodiments, referring to fig. 10 to 16, the transmission assembly includes a cam 21, the cam 21 is driven by the power assembly 1 to rotate, an abutment portion for abutting against the cam profile 211 is provided on the lifting assembly 31, a reset elastic member for abutting the lifting assembly 31 against the cam profile 211 is provided on the printer, and the cam 21 drives the lifting assembly 31 to lift by rotation.
When printing, the cam 21 rotates under the action of the power assembly 1, the lifting assembly 31 can be fluctuated along with the cam profile surface 211, the elastic member is reset to self-adaptively adjust the elastic force, when the cam 21 rotates to the vertex position of the cam and the lifting assembly 31 is abutted, the lifting assembly 31 is at the lowest position, and the printing head 5 is at the limit position, namely, when the printing head 5 is lifted along with the lifting assembly 31, the vertex of the cam 21 can be used for limiting the lowest stroke position of the printing head 5, and when the printing head 5 rotates under the action of the lifting assembly 31, the vertex of the cam 21 can be used for limiting the limit angle position of the printing head 5.
In some embodiments, referring to fig. 10 to 15, the transmission assembly further includes a driving gear 22, the driving gear 22 rotates under the driving of the power assembly 1, the cam 21 is a disc cam 21, and an engagement tooth portion 212 for engaging with the driving gear 22 is provided on the cam 21, so that the cam 21 rotates under the driving of the driving gear 22. In other embodiments, referring to fig. 16, the transmission assembly further includes a driving wheel 26, where the driving wheel 26 rotates under the driving of the power assembly 1, and the cam 21 is a disc cam 21, and a driven part for forming a belt transmission assembly or a chain transmission structure with the driving wheel 26 is provided on the cam 21, so that the cam 21 rotates under the driving of the driving wheel. In practical implementations, the cam may also be an end cam, and the lifting assembly 31 is cooperatively provided with an abutment structure that abuts against the cam profile surface of the end cam.
In some embodiments, referring to fig. 1 to 9, the transmission assembly includes a rotation member 23 sleeved outside the lifting assembly 31 and an anti-rotation structure for preventing the lifting assembly 31 from rotating, the rotation member 23 rotates under the action of the power assembly 1, and a screw pair is disposed between the rotation member 23 and the lifting assembly 31.
When the position of the printing head 5 is adjusted, the power component 1 outputs rotary power, the transmission component transmits the rotary power to the lifting component 31 to enable the lifting component 31 to drive the printing head 5 to lift, in the power transmission process, as a thread pair is arranged between the rotary member 23 of the transmission component and the lifting component 31, and the transmission component further comprises an anti-rotation mechanism for preventing the lifting component 31 from rotating, when the rotary member 23 rotates under the action of the power component 1, the lifting component 31 is pushed to lift through the thread pair, so that the printing head 5 is driven to lift.
In some embodiments, the power assembly outputs rotational motion, and the rotational direction of the rotational motion output by the power assembly is the same as the rotational direction of the rotating member, i.e., the power assembly may be directly connected to the rotating member; of course, in the actual implementation process, the rotation direction of the rotation motion output by the power assembly and the rotation direction of the rotating member may be opposite, for example, a power gear may be installed at the output end of the power assembly, and external teeth are provided on the rotating member, so that the power gear and the external teeth are directly or indirectly meshed.
In other embodiments, see fig. 1 and fig. 9 only, the transmission assembly further comprises a worm 24, the worm 24 is connected with the power assembly 1, the rotating member 23 is provided with worm gear teeth 232a matched with the worm, and the axis of the worm 24 is perpendicular to the axis of the rotating member 23. In this arrangement, the worm 24 is arranged horizontally, so that the output shaft of the power assembly 1 (e.g. an electric motor) is also horizontal, which is advantageous in preventing the overall printer from being oversized due to the arrangement of the transmission assembly, and in controlling the overall printer size.
In some embodiments, referring to fig. 1 to 9, the automatic adjustment structure of the print head 5 further includes a mounting seat 4 provided on the printer, a guide hole 41 for guiding the lifting assembly 31 is provided on the mounting seat 4, the anti-rotation structure includes an anti-rotation guide groove 42 and an anti-rotation protrusion 312a slidably provided in the anti-rotation guide groove 42, the anti-rotation guide groove 42 is a vertical guide groove consistent with the lifting direction of the lifting assembly 31, where the anti-rotation guide groove 42 is provided on an inner wall of the guide hole 41, the anti-rotation protrusion 312a is provided on the lifting assembly 31, but in an actual implementation, the anti-rotation guide groove 42 may be provided on the lifting assembly 31, and the anti-rotation protrusion 312a is provided on an inner wall of the guide hole 41.
In some embodiments, referring to fig. 1 to 9, the executing assembly 3 includes a lifting power input shaft 311 and a lifting power output shaft 312, the lifting power input shaft 311 and the lifting power output shaft 312 are coaxially disposed, and a first elastic member 32 is disposed between the lifting power output shaft 312 and the printhead 5 such that a bottom of the lifting power input shaft 311 abuts against a top of the lifting power output shaft 312. This kind of with lifting unit 31 segmentation mode of setting up, on the one hand the dismouting of being convenient for, on the other hand, the segmentation shaping has shortened the axial size of single part in the lifting unit 31, and the shaping quality of whole lifting unit 31 is more easily controlled, and sets up this first elastic component 32 and is favorable to improving printing quality.
In some embodiments, referring to fig. 1 to 9, the top of the lifting power output shaft 312 is provided with a groove, and the bottom of the lifting power input shaft 311 is embedded in the groove; in other embodiments, the bottom of the lift power input shaft is provided with a recess into which the top of the lift power output shaft is embedded. It is more advantageous that the lifting power output shaft 312 is kept coaxial with the lifting power input shaft 311.
In some embodiments, referring to fig. 1 to 9, the automatic printhead position adjusting structure further includes a detachable top cover 7 disposed on the mounting base 4, the rotary member 23 includes a central sleeve 231 and a rotary disc 232 integrally disposed on the periphery of the central sleeve 231, the worm gear is disposed on the outer edge of the rotary disc 232, the mounting base 4 is provided with a limiting surface 43 for positioning the axial position of the rotary disc 232, the top cover 7 is provided with a pressing portion 71 for pressing the rotary disc 232 on the limiting surface 43, and an annular elastic sheet 25 is disposed between the pressing portion 71 and the rotary disc 232.
When the position of the printing head 5 is adjusted, the rotary piece 23 rotates under the drive of the worm, the annular elastic piece 25 is limited by the gland during rotation, the worm gear teeth 232a are extruded by the worm 24 to enable the rotary piece 23 to bear axial force and tangential force, the rotary piece 23 extrudes the annular elastic piece 25 under the action of the axial force, the annular elastic piece 25 is compressed to enable a gap to be formed between the limiting surface 43 and the rotary piece 23, the rotary piece 23 rotates under the action of the tangential force, and when the resilience force of the annular elastic piece 25 is larger than the axial force, the annular elastic piece 25 presses the rotary piece 23 back to the limiting surface 43. The annular elastic sheet 25 is beneficial to counteracting the axial force of the rotating member 23 in the circumferential direction in a relatively balanced manner.
In some embodiments, referring to fig. 1 to 9, the annular elastic piece 25 is a wave spring, which can make the entire annular elastic piece 25 intermittent when contacting with the rotating member 23 in the circumferential direction, so as to reduce friction of the annular elastic piece 25 to the rotating member 23 when the rotating member 23 rotates.
In some embodiments, referring to fig. 1 to 9, the guide hole 41 extends to the bottom surface of the rotary disc 232, such that the aperture periphery of the guide hole 41 forms the limiting surface 43, the center sleeve 231 extends into the guide hole 41, a threaded portion 231a for being screwed with the lifting power input shaft 311 is disposed in the center sleeve 231, and the lifting power input shaft 311 penetrates through the center sleeve 231 and the top cover 7. In the printing process, the lifting action of the lifting assembly 31 can be directly observed by naked eyes, so that the abnormality of the lifting assembly 31 can be found in time.
In some embodiments, the automatic printhead position adjustment structure further includes a position sensor for detecting a lift position of the printhead. Whether the transmission component adopts a cam or a thread pair to drive the lifting component, the transmission component is mounted on the mounting seat, in the practical implementation process, the position sensor 6 can be arranged on the mounting seat 4, the lifting component 31 is provided with a reflecting part 312b opposite to the sensor mounting seat 4, the detection of the lifting component 31 is realized, the conversion of the position of the printing head 5 is carried out, for example, see fig. 1 to 6, the position sensor 6 is positioned outside the guide hole 41, and the inner wall of the guide hole 41 is provided with a reflecting part guide groove 44 for the signal reflecting part 312b to extend out of the guide hole 41. In the actual implementation, the position sensor 6 may be mounted on the print head 5, and a signal reflection surface may be provided on the mount 4 at a position facing the position sensor 6.
In some embodiments, referring to fig. 1 to 9, each power assembly 1 corresponds to a set of transmission assemblies, each executing assembly 3 corresponds to a set of transmission assemblies, and the number of transmission assemblies is at least two, so that at least two contact positions exist between the executing assembly and the printing head, and each contact position is distributed along the paper width direction corresponding to the printing head. When the label paper is printed through the printer, if the width of the label is inconsistent with the width of the base paper, the thickness of the label paper in the width direction is different, and as two contact positions are arranged between the execution assembly and the printing head, the corresponding lifting assemblies at the two contact positions can be lifted to different height positions, so that the lifting degree of each lifting assembly is matched with the thickness of the label paper at the corresponding position, and the quality of the printer is improved.
In some embodiments, referring to fig. 10 to 16, each set of power components corresponds to one set of driving components, each executing component corresponds to at least one set of driving components, and the number of driving components is at least two, so that there are at least two contact positions between the executing component and the driving components, and each contact position is distributed along the direction of the printing head corresponding to the paper width. At this time, through two sets of drive assembly, make lifting assembly in the different height of going up and down of two contact positions to match the thickness in different positions of label paper, be favorable to improving the print quality. Of course, only one set of power components, one set of transmission components and one set of execution components may be provided in the actual implementation.
In the description of the present invention, unless explicitly stated and limited otherwise, the "upper" or "lower" of a first feature in a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact with each other through another feature therebetween.
In the description of the invention, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (7)
1. A printhead position automatic adjustment mechanism, comprising:
a power assembly for outputting rotational power;
the execution assembly is used for driving the printing head to carry out position adjustment and comprises a lifting assembly;
a transmission assembly for converting rotational power of the power assembly into elevating movement of the elevating assembly;
the printer comprises a printing head, an executing assembly, a printer, a reset elastic piece and a lifting assembly, wherein the printing head is arranged on the printer in a lifting or rotatable mode, the printing head is connected with the executing assembly or the executing assembly is abutted against the printing head, the printer is provided with the reset elastic piece for driving the printing head to move towards the direction where the executing assembly is located, when the lifting assembly is arranged downwards, the executing assembly pushes the printing head to downwards or downwards rotate, and when the lifting assembly is arranged upwards, the reset elastic piece pushes the printing head to upwards reset or upwards rotate to reset;
the transmission assembly comprises a rotating member sleeved outside the lifting assembly and an anti-rotation structure used for preventing the lifting assembly from rotating, the rotating member rotates under the action of the power assembly, and a thread pair is arranged between the rotating member and the lifting assembly;
the transmission assembly further comprises a worm, the worm is connected with the power assembly, worm gear teeth matched with the worm are arranged on the rotating member, and the axis of the worm is perpendicular to the axis of the rotating member;
the automatic adjusting structure further comprises a mounting seat arranged on the printer, a guide hole for guiding the lifting assembly is arranged on the mounting seat, the anti-rotation structure comprises an anti-rotation guide groove and an anti-rotation protrusion which is slidably arranged in the anti-rotation guide groove, and the anti-rotation guide groove is a vertical guide groove consistent with the lifting direction of the lifting assembly;
the anti-rotation guide groove is formed in the inner wall of the guide hole, and the anti-rotation protrusion is arranged on the lifting assembly; or the anti-rotation guide groove is formed on the lifting assembly, and the anti-rotation protrusion is arranged on the inner wall of the guide hole;
the execution assembly comprises a lifting power input shaft and a lifting power output shaft, the lifting power input shaft and the lifting power output shaft are coaxially arranged, and a first elastic piece is arranged between the lifting power output shaft and the printing head, so that the bottom of the lifting power input shaft is propped against the top of the lifting power output shaft;
the top of the lifting power output shaft is provided with a groove, and the bottom of the lifting power input shaft is embedded into the groove; or the bottom of the lifting power input shaft is provided with a groove, and the top of the lifting power output shaft is embedded into the groove;
the rotary part comprises a central sleeve and a rotary disc integrally arranged on the periphery of the central sleeve, worm gear teeth are arranged on the outer edge of the rotary disc, a limiting surface for positioning the axial position of the rotary disc is arranged on the mounting seat, a pressing part for pressing the rotary disc on the limiting surface is arranged on the top cover, and an annular elastic sheet is arranged between the pressing part and the rotary disc.
2. The print head position automatic adjustment structure according to claim 1, characterized in that: the transmission assembly comprises a cam which rotates under the drive of the power assembly,
the printer comprises a lifting assembly, a cam, a printer and a printer, wherein the lifting assembly is provided with an abutting part for abutting against the profile surface of the cam, the printer is provided with a reset elastic piece for enabling the lifting assembly to abut against the profile surface of the cam, and the cam drives the lifting assembly to lift through rotation.
3. The print head position automatic adjustment structure according to claim 2, characterized in that:
the cam is an end-face cam,
or (b)
The transmission assembly further comprises a driving gear, the driving gear rotates under the drive of the power assembly, the cam is a disc cam, and the cam is provided with a meshing tooth part for meshing with the driving gear, so that the cam rotates under the drive of the driving gear;
or (b)
The transmission assembly further comprises a driving wheel, the driving wheel rotates under the driving of the power assembly, the cam is a disc cam, and a driven part used for forming a belt transmission assembly or a chain transmission structure with the driving wheel is arranged on the cam, so that the cam rotates under the driving of the driving wheel.
4. The print head position automatic adjustment structure according to claim 1, characterized in that:
the guide hole extends to the bottom surface of the rotary disc, so that the limit surface is formed on the periphery of an orifice of the guide hole, the center sleeve extends into the guide hole, a threaded part which is used for being matched with the lifting power input shaft through threads is arranged in the center sleeve, and the lifting power input shaft penetrates through the center sleeve and the top cover.
5. The print head position automatic adjustment structure according to claim 1, characterized in that: a position sensor for detecting the elevation position of the print head is also included.
6. The print head position automatic adjustment structure according to claim 1, characterized in that:
each group of power components corresponds to one group of transmission components, each group of execution components corresponds to one group of transmission components, the number of the transmission components is at least two, at least two contact positions are arranged between the execution components and the printing head, and the contact positions are distributed along the paper width direction corresponding to the printing head;
or (b)
Each group of power components corresponds to one group of transmission components, each executing component corresponds to at least one group of transmission components, the number of the transmission components is at least two, at least two contact positions are arranged between each executing component and each transmission component, and each contact position is distributed along the paper width direction corresponding to the printing head;
or (b)
The power assembly, the transmission assembly and the execution assembly are all a group.
7. A printer, characterized by: comprising a printhead as claimed in any one of claims 1 to 6.
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