CN216183859U - Print head and printing apparatus - Google Patents

Abstract

The utility model provides a printing head and a printing device. The print head is provided in a printing apparatus that prints on a printing medium using an ink ribbon, and includes: a head unit that guides each of a plurality of printing wires that attach ink of an ink ribbon to a printing medium; a guide roller that protrudes from the print head toward a platen of the printing apparatus, as compared to a head tip surface from which each of the plurality of printing needles protrudes, and that rotates around a predetermined rotation axis; a guide roller support portion connected to the rotary shaft and rotatably supporting the guide roller; a fastening section that fastens the nose section and the guide roller support section; and a support portion that supports at least one of the head portion and the guide roller support portion so that a relative position between a first portion provided on the head portion and a second portion provided on the guide roller support portion does not change.

Description

Print head and printing apparatus

Technical Field

The present disclosure relates to a printing head and a printing apparatus.

Background

Research and development have been conducted on printing apparatuses for printing on print media such as passbooks of banks.

In this regard, a printing apparatus is known which performs printing by a head including a protruding portion which causes at least a part of a plurality of printing wires to protrude and causes ink of an ink ribbon (ink ribbon) to adhere to a printing medium, a head portion which guides each of the plurality of printing wires protruding from the protruding portion, and a guide roller support portion which supports a guide roller which rotates in contact with the printing medium (see patent document 1).

In the head of the printing apparatus described in patent document 1, the guide roller support portion is fastened to the head portion by a screw so that a positional relationship between the head portion and the guide roller support portion becomes a predetermined positional relationship. However, in such fastening by screws, the positional relationship between the organic head and the guide roller support portion may deviate from a predetermined positional relationship due to the torque of the screw.

Patent document 1: japanese patent laid-open publication No. 2006 + 026952

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, one aspect of the present disclosure is a print head provided in a printing apparatus that prints on a print medium using an ink ribbon, the print head including: a head unit that guides each of a plurality of printing wires that attach ink of the ink ribbon to the printing medium; a guide roller that protrudes from the print head toward a platen of the printing apparatus, in comparison with a head tip surface from which each of the plurality of printing needles protrudes, and that rotates around a predetermined rotation axis; a guide roller support portion that is connected to the rotating shaft and rotatably supports the guide roller; a fastening section that fastens the nose section and the guide roller support section; and a support portion that supports at least one of the head portion and the guide roller support portion so that a relative position between a first portion provided on the head portion and a second portion provided on the guide roller support portion does not change.

In the print head of the present disclosure, it is preferable that the first portion is a portion including a first opening among portions provided on the head portion, and the support portion is a pin inserted into the first opening, is provided as the second portion on the guide roller support portion, and supports the head portion by being inserted into the first opening.

In the print head of the present disclosure, it is preferable that the pin has a cylindrical shape, and the head portion is supported by the support portion so as to be rotatable about a center axis of the pin with respect to the guide roller support portion.

In the print head of the present disclosure, it is preferable that the second portion is a portion including a second opening, among portions provided on the guide roller support portion, and the support portion is a pin inserted into the second opening, is provided as the first portion on the head portion, and supports the guide roller support portion by being inserted into the second opening.

In the print head of the present disclosure, it is preferable that the pin has a cylindrical shape, and the guide roller support portion is supported by the support portion so as to be rotatable about a center axis of the pin with respect to the head portion.

In the print head of the present disclosure, it is preferable that the first portion is a portion including a first opening out of portions provided on the head portion, the second portion is a portion including a second opening out of portions provided on the guide roller support portion, and the support portion is a pin inserted through the first opening and the second opening, and supports both the head portion and the guide roller support portion by being inserted through the first opening and the second opening.

In the print head of the present disclosure, it is preferable that the pin has a cylindrical shape, and the head unit and the guide roller support unit are supported by the support unit so as to be rotatable around a center axis of the pin.

In the print head of the present disclosure, it is preferable that a distance between a tip of the guide roller and the first portion in a projecting direction in which each of the plurality of printing pins projects is shorter than a distance between a first end of two ends of the guide roller support portion and the first portion in a crossing direction crossing both a direction parallel to the rotation axis and the projecting direction.

In the print head of the present disclosure, the first portion is preferably a portion closer to a second end portion of the two end portions of the head portion in the intersecting direction than a first end portion of the two end portions of the head portion in the intersecting direction.

Another aspect of the present disclosure is a printing apparatus including the print head.

According to the present invention, it is possible to suppress the positional relationship between the head section and the guide roller support section from deviating from a predetermined positional relationship.

Drawings

Fig. 1 is a perspective view showing an example of an external appearance of a printing apparatus 10 according to an embodiment.

Fig. 2 is a perspective view showing an example of the printing apparatus main body 11.

Fig. 3 is a perspective view showing an example of the configuration of a main part of the printing apparatus main body 11.

Fig. 4 is a diagram showing an example of the structure of the head HD.

Fig. 5 is a perspective view showing an example of the structure of the nose part HD 2.

Fig. 6 is a diagram illustrating torques applied to the guide roller holder HD1 from the tightening portions SC1 and SC2, respectively.

Fig. 7 is a diagram for explaining the roller gap RG.

Detailed Description

Detailed description of the preferred embodiments

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

In addition, hereinafter, the directions in the drawings are explained using a three-dimensional coordinate system TC. The three-dimensional coordinate system TC is a three-dimensional orthogonal coordinate system indicating directions in the respective drawings in which the three-dimensional coordinate system TC is drawn. Hereinafter, for convenience of explanation, the X axis in the three-dimensional coordinate system TC will be referred to as the X axis only. Hereinafter, for convenience of explanation, the Y axis in the three-dimensional coordinate system TC will be referred to as only the Y axis. Hereinafter, for convenience of explanation, the Z axis in the three-dimensional coordinate system TC will be referred to as the Z axis only.

Further, hereinafter, as an example, a case where the negative direction of the Z axis coincides with the gravity direction will be described. Hereinafter, for convenience of explanation, the positive direction of the Z axis is referred to as an upward direction or simply an upward direction. Hereinafter, for convenience of explanation, the negative direction of the Z axis is referred to as a downward direction or simply a downward direction. Hereinafter, for convenience of explanation, the positive direction of the Y axis will be referred to as the right direction or only the right direction. Hereinafter, for convenience of explanation, the negative direction of the Y axis is referred to as the left direction or only the left direction. Hereinafter, for convenience of explanation, the positive direction of the X axis will be referred to as the front direction or simply the front direction. Hereinafter, for convenience of explanation, the negative direction of the X axis will be referred to as the rear direction or simply the rear direction.

Structure of printing device

First, the configuration of the printing apparatus 10 will be described. Fig. 1 is a perspective view showing an example of an external appearance of a printing apparatus 10 according to an embodiment.

The printing device 10 is a dot impact printer. In the example shown in fig. 1, the printing apparatus 10 is a passbook printer which is a kind of dot impact printer. Therefore, hereinafter, a case where the printing apparatus 10 is a passbook printer will be described as an example. Instead of a passbook printer, the printing apparatus 10 may be a click printer of another type.

Since the printing apparatus 10 is a dot impact printer, the printing medium is printed using an ink ribbon. A print medium 100 shown in fig. 1 is an example of a print medium to be printed by the printing apparatus 10. Hereinafter, a case will be described where the printing apparatus 10 performs printing on the printing medium 100 shown in fig. 1 as an example.

Here, the print medium 100 is a sheet on which images such as characters are printed. The print medium 100 may be, for example, a single sheet cut into a predetermined length, or a continuous sheet formed by connecting a plurality of sheets. The single sheet may be, for example, plain paper such as a single sheet or a single copy sheet, a passbook, a postcard, an envelope, or another sheet cut to a predetermined length. The continuous sheet is, for example, continuous paper, continuous carbon paper, or the like. Hereinafter, since the printing apparatus 10 shown in fig. 1 is a passbook printer, a case where the printing medium 100 is a passbook will be described as an example. In this case, the printing medium 100 is configured by binding a plurality of recording sheets together, and a magnetic stripe 101 is provided on a surface which becomes a bottom surface when a recording surface of the recording sheet is opened. The print medium 100 may be a booklet having pages with different thicknesses, such as a passbook. Further, the print medium 100 may not be provided with the magnetic stripe 101.

The printing apparatus 10 includes a printing apparatus main body 11, an upper cover 12 as an exterior body covering the printing apparatus main body 11, an upper housing 13, and a lower housing 14. Further, a manual insertion opening 15 is opened in front surfaces of the upper cover 13 and the lower cover 14. In fig. 1, the printing apparatus main body 11 is not visible because it is located inside the printing apparatus 10.

Fig. 2 is a perspective view showing an example of the printing apparatus main body 11. Fig. 3 is a perspective view showing an example of a configuration of a main part of the printing apparatus main body 11.

The printing apparatus main body 11 includes a main body frame, not shown, including a left side frame 16 and a right side frame 17. In the printing apparatus main body 11, a carriage shaft CA is provided between a left side frame 16 and a right side frame 17 provided in the main body frame. The printing apparatus main body 11 includes a printing mechanism unit PM including a head HD and a carriage CG. The printing apparatus main body 11 includes a platen PL having a flat plate shape that is provided at a position facing the head HD and is movable in a direction approaching the head HD and a direction separating from the head HD.

Here, the head HD is a print head of a dot impact printer. The head HD prints an image such as characters on the printing medium 100 by causing ink of the ink ribbon to adhere to the printing medium 100 by causing at least a part of a plurality of printing wires (pins/pins) to protrude. In other words, the head HD is a print head having an impact system for striking a print pin of the print medium 100.

In the printing apparatus 10, an ink ribbon is disposed between the printing wire protruding from the head HD and the printing medium 100. Therefore, in the case where a certain printing wire protrudes from the head HD, the printing wire protruding from the head HD strikes the ink ribbon and causes the ink of the ink ribbon to be transferred onto the print medium 100. In other words, in this case, the printing wire is pressed against the printing medium 100 via the ink ribbon, and the ink of the ink ribbon is transferred to the printing medium 100. As a result, the printing apparatus 10 forms dots on the print medium 100, and prints images such as characters on the print medium 100. In fig. 2 and 3 showing the head HD, a plurality of printing pins protruding from the head HD are omitted for simplicity.

In fig. 2, the ribbon cassette CT attached between the left side frame 16 and the right side frame 17 shows an example of a ribbon cassette that stores such an ink ribbon in a folded state.

The carriage CG is slidably inserted through a carriage shaft CA. The carriage CG carries a head HD. The carriage CG is coupled to a timing belt, not shown. The timing belt is mounted on a belt driving pulley, not shown, driven by a carriage driving motor, not shown. The carriage CG is moved (scanned) in a range sandwiched between the left side frame 16 and the right side frame 17 in the main scanning direction that coincides with the axial direction of the carriage axis CA and the longitudinal direction of the platen PL by the normal rotation or the reverse rotation of the carriage drive motor. Therefore, the head HD mounted on the carriage CG can perform reciprocating movement in the scanning direction, and can print on the print medium 100 conveyed in the direction orthogonal to the scanning direction. Here, in the example shown in fig. 2 and 3, the axial direction of the carriage axis CA and the longitudinal direction of the platen PL are directions parallel to the Y axis. Further, the transport direction in which the print medium is transported may intersect the scanning direction instead of intersecting the scanning direction. The axial direction of the carriage axis CA and the longitudinal direction of the platen PL may not be parallel to the Y axis.

The printing apparatus main body 11 further includes a conveyance unit H. The transport unit H transports the print medium 100 in a transport direction orthogonal to the scanning direction of the carriage CG. In the example shown in fig. 2 and 3, since the scanning direction of the carriage CG is parallel to the Y axis, the transport unit H transports the printing medium 100 with the front and rear directions of the printing apparatus 10 as the transport directions. Here, the conveyance unit H includes a conveyance motor MT shown in fig. 2 and a plurality of conveyance rollers CR shown in fig. 3. The conveying unit H rotates the plurality of conveying rollers CR through various gears not shown by driving of the conveying motor MT. Here, the direction in which the plurality of conveyance rollers CR rotate is determined according to the rotation direction of the conveyance motor MT. That is, the transport unit H can transport the print medium 100 in either one of the front and rear directions by switching the meshing between these gears when the transport direction is the front direction and when the transport direction is the rear direction. In fig. 2 and 3, in order to prevent the drawings from becoming complicated, the configurations of the conveying unit H other than the conveying motor MT and the plurality of conveying rollers CR are omitted. Further, in fig. 2, the conveying motor MT is drawn as a cube-shaped object for the sake of simplicity. Further, in fig. 2, the conveying motor MT is depicted at a position different from a position where the conveying motor MT is actually disposed, for the sake of simplicity of the drawing.

The printing apparatus main body 11 includes a magnetic data reading/writing unit MR for reading and writing magnetic information from and to a magnetic stripe 101 provided on the printing medium 100.

According to the above configuration, the printing apparatus 10 prints an image such as characters on the printing medium 100 by striking the ink ribbon with the head HD while conveying the printing medium 100.

Structure of printing head

Here, the structure of the head HD will be described in more detail. Fig. 4 is a diagram showing an example of the structure of the head HD. In addition, since the cover covering the head HD is detached from the head HD, the shape of the head HD shown in fig. 4 is different from that of the head HD shown in fig. 3. The head HD may be configured to include such a cover or may not include such a cover.

The head HD includes a clamp portion SC1, a clamp portion SC2, a drive portion PJ, a needle guide WG, a guide roller GR, a guide roller support portion HD1, a head portion HD2, and a support portion SP. The head HD may not include any of the tightening portions SC1 and SC 2. The head HD may be configured to include another fastening portion instead of one or both of the fastening portion SC1 and the fastening portion SC 2. The head HD may be configured to include another fastening portion in addition to one or both of the fastening portion SC1 and the fastening portion SC 2. Further, the fastening portions SC1 and SC2 may be integrally formed.

Fastening portions SC1 and SC2 fasten head portion HD2 and guide roller bearing portion HD 1. In the example shown in fig. 4, fastening portions SC1 and SC2 are screws. Instead of screws, either one or both of fastening section SC1 and fastening section SC2 may be another fastening member capable of fastening nose section HD2 and guide roller support section HD 1.

The drive portion PJ is energized to cause at least a part of the plurality of printing wires to protrude so that ink of the ink ribbon is carried on the printing medium 100. The driving unit PJ is provided above the head HD2, and is located inside a cover that covers the head HD during normal use of the head HD. Therefore, in fig. 4, the driver PJ is not illustrated. Further, the position of the drive section PJ at the head HD is shown in fig. 3.

Here, the plurality of printing pins projecting from the driving unit PJ are arranged in parallel or substantially parallel to each other, and are guided by the printing pin guide WG so as to project in the same direction. The plurality of printing pins protrude from a head end surface M shown in fig. 4 of the surface of the printing pin guide WG toward the outside of the printing pin guide WG. Therefore, through holes through which the respective printing needles included in the plurality of printing needles pass are provided in the head distal end surface M in the same number as the number of printing needles. The head distal end surface M is a surface facing the platen PL among surfaces of the needle guide WG in normal use of the printing apparatus 10. In fig. 4, the leading end surface M is not visible because it is located behind the guide roller GR and the guide roller support portion HD 1. Among the portions of the head HD, a portion including the head distal end surface M and protruding downward from above may be referred to as a protruding portion. In this case, the vertex end surface M may be referred to as a lower surface of the protrusion.

As shown in fig. 4, the guide roller GR projects from the head HD toward the platen PL of the printing apparatus 10, as compared with the head end surface M, and rotates about a predetermined rotation axis AX. In other words, as shown in fig. 4, the guide roller GR protrudes in the protruding direction from the head end surface M and rotates around a predetermined rotation axis AX. Therefore, when printing by the head HD is being performed, the guide roller GR rotates in accordance with the movement of the head HD while contacting the print medium 100 and pressing the print medium 100 from the top to the bottom. Therefore, the rotation axis AX may be an axis parallel to any direction as long as the guide roller GR can rotate in accordance with the movement of the head HD. However, in order to reduce wear of the rotation axis AX, it is preferable that the rotation axis AX is parallel to the X axis as shown in fig. 4.

The guide roller support portion HD1 is connected to the rotation axis AX of the guide roller GR and rotatably supports the guide roller GR, among the members provided in the head HD. The guide roller support portion HD1 is provided with openings, not shown, through which the tightening portions SC1 and SC2 are inserted.

The head HD2 is a member provided with the drive section PJ at the upper portion thereof, and is a member provided with the aforementioned needle guide WG, among the members provided in the head HD. The head HD2 is a member including a flange attached to the carriage CG, among the members provided in the head HD. Therefore, as shown in fig. 5, the nose portion HD2 is provided with an opening FH1 and an opening FH2 through which two screws for fastening the nose portion HD2 to the carriage CG are inserted. Fig. 5 is a perspective view showing an example of the structure of the nose part HD 2. Fig. 5 shows a head part HD2 in which all parts attached to a head part HD2 are removed, in order to clearly show the structure of the head part HD 2.

Further, in the head part HD2, a mounting portion GD where the needle guide WG is mounted is provided. The mounting portion GD is a portion to which the printing pin guide WG is mounted, among portions of the head portion HD 2. In the example shown in fig. 5, the mounting portion GD is a portion having a groove into which the needle guide WG is fitted, among portions included in the head portion HD 2. The needle guide WG is attached to the mounting portion GD, and thus can align the direction in which each of the plurality of printing needles protrudes from the drive section PJ through the head distal end surface M with a predetermined protruding direction. Therefore, the printing needle guide WG is attached to the mounting portion GD, and thus can guide each of the plurality of printing needles in a predetermined projecting direction. In other words, the head part HD2, to which the needle guide WG is attached, guides the plurality of printing needles protruding from the drive part PJ so as to protrude in predetermined directions. Here, in the embodiment, the predetermined projecting direction is a negative direction of the Z axis. In addition, the predetermined projecting direction may be other direction instead of the negative direction of the Z axis. The head HD2 may be integrally formed with at least one of the needle guide WG and the drive section PJ. The needle guide WG may be integrally formed with the drive section PJ. Among the parts of the nose part HD2, a part including the lower end of the mounting part GD and protruding from the top to the bottom is an example of the part included in the aforementioned protruding part.

The nose part HD2 is also a part to which the guide roller support part HD1 is attached, among the parts included in the nose HD. Therefore, the nose part HD2 has a mounting surface MM to which the guide roller bearing part HD1 is mounted. In the example shown in fig. 5, the mounting surface MM is a surface parallel to a YZ plane extended by the Y axis and the Z axis. The mounting surface MM may be a surface that is not parallel to the YZ plane.

For convenience of explanation, a direction parallel to the mounting surface MM and orthogonal to the projecting direction will be referred to as a crossing direction hereinafter. The reason why the direction is referred to as the intersecting direction is that the intersecting direction intersects the protruding direction. The intersecting direction may be referred to as a direction intersecting both a direction parallel to the rotation axis AX of the guide roller GR and a projecting direction. The intersecting direction may be a direction intersecting the projecting direction and not orthogonal to the projecting direction. In the examples shown in fig. 4 and 5, the intersecting direction is a direction parallel to the Y axis.

A mounting portion GD for mounting the printing pin guide member WG is provided at the center of the mounting surface MM in the cross direction. Further, of the positions on the mounting surface MM, screw holes SH1 for fastening the fastening portions SC1 for fastening the guide roller support portions HD1 to the nose portion HD2 are provided at positions between the first end EG11 of the mounting surface MM and the mounting portion GD. The first end EG11 of the mounting surface MM is the end on the negative direction side of the Y axis among the ends that the mounting surface MM has. In other words, the first end EG11 of the mounting surface MM is one of both ends of the mounting surface MM in the cross direction. Further, a screw hole SH2 for fastening the fastening portion SC2 for fastening the guide roller support portion HD1 to the nose portion HD2 is attached to a position between the second end EG12 of the attachment surface MM and the attachment portion GD, among positions on the attachment surface MM. The second end EG12 of the mounting surface MM is an end on the positive direction side of the Y axis among the ends that the mounting surface MM has. In other words, the second end EG12 of the mounting surface MM is the other of the two ends of the mounting surface MM in the cross direction. The first end EG11 is an example of a first end of the nosepiece. Further, the second end EG12 is an example of a second end of the nosepiece.

In the example shown in fig. 4 and 5, the mounting surface MM has a substantially line-symmetrical shape with the mounting portion GD therebetween. However, the mounting surface MM may have a shape different from a shape substantially symmetrical with respect to the line with the mounting portion GD therebetween.

Further, the positions of the screw holes SH1 on the mounting surface MM and the positions of the screw holes SH2 on the mounting surface MM are preferably spaced apart from each other with the mounting portion GD therebetween in order to fasten the guide roller support portions HD1 to the nose portion HD2 more firmly. Therefore, in the example shown in fig. 4 and 5, the screw hole SH1 is provided on the mounting surface MM at a position closer to the first end EG11 than the mounting portion GD. Further, in this example, the screw hole SH2 is provided on the mounting surface MM at a position closer to the second end EG12 than the mounting portion GD.

Here, the guide roller bearing portion HD1 is fastened to the head portion HD2 by a fastening portion SC1 and a fastening portion SC2 as screws so that the positional relationship between the head portion HD2 and the guide roller bearing portion HD1 becomes a predetermined positional relationship. However, when the guide roller support part HD1 is fastened to the nose part HD2 by the fastening part SC1 and the fastening part SC2, torque is transmitted from the fastening part SC1 and the fastening part SC2 to the guide roller support part HD1, respectively, by tightening the screws. As a result, the positional relationship between the nose part HD2 and the guide roller support part HD1 may deviate from the predetermined positional relationship. Fig. 6 is a diagram illustrating torques applied to the guide roller holder HD1 from the tightening portions SC1 and SC2, respectively. Arrow a1 shown in fig. 6 indicates the magnitude and direction of the torque applied from fastening section SC1 to guide roller bearing HD1 in the tightening screw of fastening section SC 1. Further, an arrow mark a2 shown in fig. 6 indicates the magnitude and direction of the torque applied from the fastening section SC2 to the guide roller bearing section HD1 in the tightening screw of the fastening section SC 2. In the case where these torques are applied to the guide roller bearing HD1, there is a case where the positional relationship of the nose portion HD2 and the guide roller bearing HD1 will deviate from the predetermined positional relationship. In order to solve this problem, support portion SP is provided as first portion PH1 of head portion HD2 on mounting surface MM of head portion HD 2.

Support SP is a member that supports guide roller support HD1 so that the relative position of first position PH1 of nose portion HD2 and second position PH2 provided on guide roller support HD1 does not change. In the example shown in fig. 4 and 5, the support portion SP is a cylindrical pin. In this case, a portion including the second opening H2 through which the pin is inserted is provided in the guide roller bearing HD1 as the second portion PH2 of the guide roller bearing HD 1. The support portion SP may be a pin having another shape instead of the cylindrical pin, or may be another member capable of supporting the guide roller support portion HD1 instead of the pin. For example, support SP may be a member that holds guide roller support HD1 so as to immobilize guide roller support HD1 with respect to nose HD2 while maintaining the positional relationship between nose HD2 and guide roller support HD1 in a predetermined positional relationship, among the members provided in nose HD 2. In this case, the first portion PH1 may be any portion as long as it is a portion of the nose portion HD 2. In this case, the second position PH2 may be any position as long as it is a position that the guide roller supporting portion HD1 has.

Here, when the support SP is inserted into the second opening H2 of the second position PH2 with respect to the relative position of the nose portion HD2 and the guide roller support portion HD1, the relative position does not change in the direction parallel to the X axis as shown in fig. 4 and 5. Therefore, in the example shown in fig. 4 and 5, the position of the first portion PH1 is indicated by a cylindrical pin, i.e., a position on the YZ plane of the center axis of the first portion. Further, in this example, the position of the second position PH2 is indicated by a position on the YZ plane of the central axis of the cylindrical second opening H2. When the positions of first position PH1 and second position PH2 are shown in this way, the relative positions of nose portion HD2 and guide roller support portion HD1 do not change even if guide roller support portion HD1 is rotated around the center axis of support portion SP. That is, since support portion SP is configured in this manner, guide roller support portion HD1 can be supported so that the relative position between first portion PH1 provided at nose portion HD2 and second portion PH2 provided at guide roller support portion HD1 does not change.

In the case where the retainer SP is inserted into the second opening H2, even if torque is applied to the guide roller retainer HD1 by the tightening portions SC1 and SC2, respectively, the movement of the guide roller retainer HD1 is restricted by the retainer SP, and the positional relationship between the nose portion HD2 and the guide roller retainer HD1 is maintained at a predetermined positional relationship. That is, the head HD can be prevented from being displaced from the predetermined positional relationship by providing the support portion SP to the guide roller support portion and the nose portion.

Further, of the portions of the guide roller support portion HD1, a portion in the area surrounded by the broken line shown in fig. 4 is an example of the second portion PH 2. However, the second position PH2 of the guide roller supporting portion HD1 may be a position within a wider area than the area shown in fig. 4 instead of the position within the area enclosed by the broken line, or may be a position within a narrower area than the area shown in fig. 4 enclosed by the broken line. In any case, the second portion PH2 is a portion including the second opening H2.

In addition, as first position PH1, support SP may be provided at any position on mounting surface MM of nose portion HD2, except for the positions where screw holes SH1 and SH2 are provided, respectively. In the example shown in fig. 5, as the first position PH1, the support portion SP is provided at a position closer to the screw hole SH2 than the screw hole SH 1. In other words, as the first portion PH1, the support portion SP is provided at a position closer to the second end EG12 in the cross direction than the first end EG11 on the mounting surface MM.

Here, as shown in fig. 4, the distance X1 between the tip E of the guide roller GR and the first portion PH1 in the projecting direction may be shorter than the distance X2 between the first end EG21 of the guide roller supporting portion HD1 and the first portion PH 1. The first end EG21 of the guide roller receiving portion HD1 is the end farther from the second point PH2 of the two ends of the guide roller receiving portion HD1 in the intersecting direction. In this case, the assembling person who assembles the head HD can easily perform the adjustment work of matching the roller gap RG shown in fig. 7 with a predetermined distance. Fig. 7 is a diagram for explaining the roller gap RG. The roller gap RG is a distance between the leading end E of the guide roller GR and the head leading end surface M among the distances in the projecting direction. If the roller gap RG does not coincide with the predetermined distance, the printing device 10 may fail to print the print medium 100. In order to avoid such a problem, the printing apparatus 10 performs adjustment to make the roller gap RG equal to a predetermined distance before shipment. This adjustment is performed manually by the assembler. Therefore, it is important to facilitate the adjustment and to improve the work efficiency of the assembling worker.

In the case where the distance X1 is shorter than the distance X2, even if the assembler moves the first end EG21 of the guide roller support portion HD1 to rotate the guide roller support portion HD1 around the center axis of the first portion PH1 as the support portion SP, the amount of movement of the tip end E of the guide roller GR is smaller than the amount of movement of the first end EG21 of the guide roller support portion HD 1. Therefore, the head HD can easily perform the adjustment of the roller gap RG by the assembling person. However, in order to obtain such an effect, it is necessary that support portion SP is a member having a shape capable of supporting guide roller support portion HD1 so as to be rotatable about the center axis of support portion SP with respect to nose portion HD 2. A cylindrical pin is one example of such a component. Therefore, as in the embodiment, when the support portion SP is a cylindrical pin, the head HD makes the distance X1 shorter than the distance X2, thereby making it easy for an assembler to perform an adjustment operation for matching the roller gap RG with a predetermined distance.

Modification example 1 of the embodiment

Modification 1 of the embodiment will be described below.

In modification 1 of the embodiment, support SP is provided as second position PH2 on guide roller support HD 1. In this case, first portion PH1 including first opening H1 through which support portion SP is inserted is provided on mounting surface MM of nose portion HD 2. That is, the support portion SP according to modification 1 of the embodiment is a member that supports the head portion HD2 so that the relative position between the first portion PH1 provided to the head portion HD2 and the second portion PH2 provided to the guide roller support portion HD1 does not change. In this case, the support portion SP may be a pin having a cylindrical shape or a pin having a shape different from the cylindrical shape. In the case where support portion SP is a cylindrical pin, guide roller support portion HD1 is supported so as to be rotatable about the center axis of support portion SP with respect to nose portion HD 2.

Even with such a configuration, the head HD can suppress the positional relationship between the head part HD2 and the guide roller support part HD1 from deviating from a predetermined positional relationship, as in the embodiment. In the head HD, when the support portion SP is a cylindrical pin, the distance X1 can be made shorter than the distance X2, so that the assembling worker can easily perform the adjustment work for matching the roller gap RG with a predetermined distance.

Modification 2 of the embodiment

Modification 2 of the embodiment will be described below.

In modification 2 of the embodiment, support portion SP is separate from both of head portion HD2 and guide roller support portion HD 1. In this case, first portion PH1 including first opening H1 through which support portion SP is inserted is provided on mounting surface MM of nose portion HD 2. In this case, the guide roller receiving portion HD1 is provided with the second portion PH2 including the second opening H2, as in the embodiment. The support portion SP is inserted into both the first opening H1 and the second opening H2. That is, the support portion SP according to modification 2 of the embodiment is a member that supports both the head portion HD2 and the guide roller support portion HD1 so that the relative position between the first portion PH1 provided on the head portion HD2 and the second portion PH2 provided on the guide roller support portion HD1 does not change. In this case, the head HD may be configured to include a fixing portion that fixes the support portion SP so that the support portion SP does not fall out of each of the first opening H1 and the second opening H2. In this case, the head HD may be configured to adhere or press-contact the support portions SP so that the support portions SP do not fall out of each of the first opening H1 and the second opening H2. In this case, the support portion SP may be a pin having a cylindrical shape or a pin having a shape different from the cylindrical shape. When support portion SP is a cylindrical pin, nose portion HD2 and guide roller support portion HD1 are supported so as to be rotatable about the central axis of support portion SP.

Even with such a configuration, the head HD can suppress the positional relationship between the nose part HD2 and the guide roller support part HD1 from deviating from the predetermined positional relationship, as in the embodiment. Further, in the case where the support portion SP is a pin having a cylindrical shape, the head HD can easily perform an adjustment work of matching the roller gap RG with a predetermined distance by making the distance X1 shorter than the distance X2.

As described above, the head according to the embodiment is a head provided in a printing apparatus that prints on a printing medium using an ink ribbon, and includes: a head unit that guides each of a plurality of printing wires that attach ink of an ink ribbon to a printing medium; a guide roller that protrudes from the print head toward a platen of the printing apparatus, as compared to a head tip surface from which each of the plurality of printing needles protrudes, and that rotates around a predetermined rotation axis; a guide roller support portion connected to the rotation shaft and rotatably supporting the guide roller; a fastening section that fastens the nose section and the guide roller support section; and a support portion that supports at least one of the head portion and the guide roller support portion so that a relative position between a first portion provided on the head portion and a second portion provided on the guide roller support portion does not change. Thus, the print head can suppress the positional relationship between the head section and the guide roller support section from deviating from a predetermined positional relationship. Here, in the example explained in the above, the head HD is one example of a print head. Further, in the example explained in the above, the print medium 100 is one example of a print medium. Further, in the example explained in the above, the set-top HD2 is one example of a set-top. Further, in the example explained in the above, the head end surface M is one example of a head end surface. Further, in the example explained in the above, the platen PL is one example of a platen. Further, in the example explained in the above, the rotation axis AX is one example of a predetermined rotation axis. Further, in the example explained in the above, the guide roller GR is one example of a guide roller. Further, in the example explained in the above, the guide roller bearing portion HD1 is one example of a guide roller bearing portion. Further, in the example explained in the above, the fastening section SC1 and the fastening section SC2 are each one example of a fastening section. In addition, in the example explained in the above, the first part PH1 is an example of the first part. In addition, in the example explained in the above, the second portion PH2 is an example of the second portion. In the example described above, the support portion SP is an example of a support portion.

In the print head, the first portion may be a portion including the first opening, among portions provided in the head portion, and the support portion may be a pin inserted into the first opening, may be provided as the second portion in the guide roller support portion, and may support the head portion by being inserted into the first opening. Here, in the example explained in the above, the first opening H1 is one example of the first opening.

In the print head, the pin may have a cylindrical shape, and the head portion may be supported by the support portion so as to be rotatable about the center axis of the pin with respect to the guide roller support portion.

In the print head, the second portion may be a portion including the second opening, among portions provided on the guide roller support portion, and the support portion may be a pin inserted into the second opening, may be provided as the first portion on the head portion, and may support the guide roller support portion by being inserted into the second opening. Here, in the example explained in the above, the second opening H2 is one example of the second opening.

In the print head, the pin may have a cylindrical shape, and the guide roller support portion may be supported by the support portion so as to be rotatable about a center axis of the pin with respect to the head portion.

In the print head, the first portion may be a portion including the first opening among portions provided on the head portion, the second portion may be a portion including the second opening among portions provided on the guide roller support portion, and the support portion may be a pin inserted through the first opening and the second opening, and may support both the head portion and the guide roller support portion by being inserted through the first opening and the second opening.

In the print head, the pin may have a cylindrical shape, and the head unit and the guide roller support unit may be supported by the support unit so as to be rotatable about the center axis of the pin.

In the print head, a distance between a tip of the guide roller in the projecting direction in which each of the plurality of printing pins projects and the first portion may be shorter than a distance between the first end of the two ends of the roller support portion and the first portion in a direction intersecting both a direction parallel to the rotation axis and the projecting direction. Here, in the example explained in the above, the tip E of the guide roller GR is one example of the tip of the guide roller. In addition, in the example described in the above, the first end EG21 is one example of the first end. Further, in the example explained in the above, the distance X1 is one example of a distance between the tip of the guide roller and the first site in the projecting direction in which the plurality of printing needles each project from the projecting portion. Further, in the example explained in the above, the distance X2 is an example of a distance between the first end and the first site of the two ends of the roller support portion that are guided in the intersecting direction that intersects both the direction parallel to the predetermined rotation axis and the projecting direction.

In the print head, the first portion may be located closer to a second end of the two ends of the head unit in the intersecting direction than a first end of the two ends of the head unit in the intersecting direction. Here, in the example explained in the above, the first end EG11 is one example of the first of the two ends of the nose portion. Further, in the example explained in the above, the second end EG12 is one example of the second of the two ends of the nose portion.

Although the embodiments of the present disclosure have been described in detail with reference to the drawings, the specific configurations are not limited to the embodiments, and may be changed, replaced, deleted, or the like without departing from the spirit of the present disclosure.

Claims (10)

1. A print head provided in a printing apparatus that prints on a print medium using an ink ribbon, the print head comprising:

a head unit that guides each of a plurality of printing wires that attach ink of the ink ribbon to the printing medium;

a guide roller that protrudes from the print head toward a platen of the printing apparatus, in comparison with a head tip surface from which each of the plurality of printing needles protrudes, and that rotates around a predetermined rotation axis;

a guide roller support portion that is connected to the rotating shaft and rotatably supports the guide roller;

a fastening section that fastens the nose section and the guide roller support section;

and a support portion that supports at least one of the head portion and the guide roller support portion so that a relative position between a first portion provided on the head portion and a second portion provided on the guide roller support portion does not change.

2. The printing head of claim 1,

the first portion is a portion including a first opening among portions provided on the nose portion,

the support portion is a pin inserted into the first opening, is provided as the second portion on the guide roller support portion, and supports the nose portion by being inserted into the first opening.

3. The printing head of claim 2,

the shape of the pin is a cylindrical shape,

the nose section is supported by the support section so as to be rotatable about a center axis of the pin with respect to the guide roller support section.

4. The printing head of claim 1,

the second portion is a portion including a second opening among portions provided on the guide roller support portion,

the support portion is a pin inserted into the second opening, is provided as the first portion on the nose portion, and supports the guide roller support portion by being inserted into the second opening.

5. The printing head of claim 4,

the shape of the pin is a cylindrical shape,

the guide roller support portion is supported by the support portion so as to be rotatable about a center axis of the pin with respect to the nose portion.

6. The printing head of claim 1,

the first portion is a portion including a first opening among portions provided on the nose portion,

the second portion is a portion including a second opening among portions provided on the guide roller support portion,

the support portion is a pin inserted into the first opening and the second opening, and supports both the nose portion and the guide roller support portion by being inserted into the first opening and the second opening.

7. The printing head of claim 6,

the shape of the pin is a cylindrical shape,

the nose section and the guide roller support section are supported by the support section so as to be rotatable about a center axis of the pin.

8. The printing head according to any of claims 1 to 7,

the distance between the leading end of the guide roller and the first portion in the projecting direction in which each of the plurality of printing pins projects is shorter than the distance between the first portion and a first one of two ends of the guide roller support portion in a crossing direction crossing both the direction parallel to the rotation axis and the projecting direction.

9. The printing head of claim 8,

the first portion is a portion closer to a second end portion of the two end portions of the nose portion in the intersecting direction than a first end portion of the two end portions of the nose portion in the intersecting direction.

10. A printing apparatus comprising the printing head according to any one of claims 1 to 9.

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