JP6284601B1 - Print head pitch adjustment device - Google Patents

Abstract

Provided is a print head pitch adjusting device capable of adjusting a pitch between a print head and a print medium accurately and accurately. An ink cartridge frame includes a storage groove, a bonding wall, a clamping unit, a variable radius convex wheel, a driving gear group, and an elastic element. The clamping unit is provided between the sliding base 11 and the ink cartridge frame 12, and restricts the movement of the ink cartridge frame relative to the sliding base by selectively clamping the sliding base and the ink cartridge frame. . The elastic element is connected to the bottom of the ink cartridge frame and the sliding base. The drive gear group is installed on the adjustment surface and is coaxially connected to the variable radius convex wheel so as to be able to rotate synchronously. Adjust the height. [Selection] Figure 2A

Description

The present invention relates to an adjustment device for an ink jet printer, and more particularly to a pitch adjustment device for a print head of an ink jet printer.

In general, a large-sized inkjet printer (Wide Format Inkjet printer) used for printing out large drawings may use different types of print media as required. However, different types of print media have different thicknesses. When printing, the difference in distance between the print head of the ink cartridge and the ink surface of the print medium affects the quality of the printed image printed out. Therefore, it is very important to control the pitch of the print head with respect to the print medium, and the precision value to be adjusted needs to be fine.

As the printing resolution is improved and the ink droplets are miniaturized, there is an increasing demand for precision of the airframe structure. Any height or pitch adjustment should not affect accuracy and must maintain accuracy. The print head pitch adjustment device is used to adjust the pitch between the print head and the print medium, and the conventional print head pitch adjustment device is realized by a linear stroke adjustment mechanism using a combination of a ball screw and a guide rod. When using a linear stroke adjustment mechanism that combines a ball screw and guide rod, the pitch between the print head and the print medium cannot be adjusted accurately and accurately, and the cost is high, the size is large, and maintenance is difficult. . There is also a conventional technology that adjusts the pitch by a linear stroke adjustment mechanism that combines a gear and a rack, but the linear stroke adjustment mechanism that combines a gear and a rack can withstand wear due to stress when used. In addition, there is a problem of the back gap, which affects the pitch adjustment accuracy.

Accordingly, an object of the present invention is to provide a print head pitch adjusting device for solving the above-described problems.

The object of the present invention is to adjust the pitch between the print head and the print medium used in an inkjet printer precisely and accurately, low cost, easy maintenance, simple structure, stability It is an object of the present invention to provide a print head pitch adjustment device that is high in level and capable of stepless fine adjustment and control.

Another object of the present invention is to overcome the problem of the back space of the prior art by the stability of the convex wheel, the convenience of the band gear group, and the merits of the spring and other designs. It is an object of the present invention to provide a print head pitch adjusting device which can be precisely adjusted without being required. In addition, because it can be easily installed with sensitive elements by installing it in electrical equipment (for example, motors and solenoid switches), the target value can be obtained by measuring the distance to the paper immediately and transmitting a signal to the control unit. The purpose of automatic adjustment is achieved by controlling the motor. Moreover, the print head pitch adjusting device of the present invention can be easily arranged in a high-stage ink jet printer on the premise that the increase in cost is refrained, and the competitiveness of the product can be enhanced.

To achieve the above object, the present invention provides a print head pitch adjusting device including a sliding base and an ink cartridge frame. The sliding base has a top side, a bottom side, and a first bonding surface. The ink cartridge frame includes a storage groove, a bonding wall, a clamping unit, an elastic element, a variable radius convex wheel, and a drive gear group. The storage groove is provided to store at least one ink cartridge, and the ink cartridge has a print head. A bonding wall has a 2nd bonding surface and an adjustment surface, and a 2nd bonding surface opposes a 1st bonding surface. The clamping unit is connected to the sliding base and the ink cartridge frame, and selectively clamps the sliding base and the ink cartridge frame to limit movement of the ink cartridge frame with respect to the sliding base. The elastic element is connected to the ink cartridge frame and the bottom of the sliding base. The radius-variable convex ring is installed on the second bonding surface and has an outer peripheral edge that comes into contact with the top side of the sliding base. The drive gear group is installed on the adjustment surface, and is coaxially connected to the variable radius convex wheel and can be rotated synchronously. The drive gear group rotates in conjunction with the variable radius convex wheel, thereby increasing the height of the ink cartridge frame relative to the sliding base. Adjust the height.

FIG. 3 is a partial structural diagram in which the print head pitch adjusting device of the present invention is used in an ink jet printer. FIG. 3 is a structural exploded view of the print head pitch adjusting apparatus according to the first preferred embodiment of the present invention at different viewing angles. FIG. 3 is a structural exploded view of the print head pitch adjusting apparatus according to the first preferred embodiment of the present invention at different viewing angles. It is a side view which shows the decomposition | disassembly structure of the pitch adjustment apparatus of the print head shown to FIG. 2A. FIG. 2B is a combined structural diagram of the pitch adjustment device for the print head shown in FIG. 2A. FIG. 3B is a front view of the print head pitch adjusting apparatus shown in FIG. 3A. FIG. 3B is a rear view of the pitch adjustment device for the print head shown in FIG. 3A. It is a front view of the partial structure of the pitch adjustment apparatus of the print head shown to FIG. 3A. It is an operation | movement relational diagram of the clamping unit of the pitch adjustment apparatus of the print head of this invention. It is an operation | movement relational diagram of the clamping unit of the pitch adjustment apparatus of the print head of this invention. FIG. 4 is a front view when the ink cartridge frame of the print head pitch adjusting device of the present invention is adjusted to the lowest point. FIG. 4 is a rear view when the ink cartridge frame of the print head pitch adjusting device of the present invention is adjusted to the lowest point. FIG. 4 is a front view when the ink cartridge frame of the print head pitch adjusting device of the present invention is adjusted to the highest point. FIG. 6 is a rear view when the ink cartridge frame of the print head pitch adjusting device of the present invention is adjusted to the highest point. FIG. 7 is a structural diagram of the print head pitch adjusting apparatus according to the second embodiment of the present invention at different viewing angles. FIG. 10 is a structural diagram of the print head pitch adjusting apparatus according to the third embodiment of the present invention at different viewing angles.

Several embodiments having the features and advantages of the present invention are described in detail below. The present invention has various changes in different embodiments, which do not depart from the scope of the present invention, and that the description and drawings are intended to illustrate the invention and not to limit the invention.

FIG. 1 is a partial structural diagram in which the print head pitch adjusting device of the present invention is used in an ink jet printer. FIGS. 2A and 2B are views of the print head pitch adjusting device of the first preferred embodiment of the present invention at different viewing angles. 2C is a side view showing an exploded structure of the print head pitch adjusting apparatus shown in FIG. 2A, and FIG. 3A is a combined structural view of the print head pitch adjusting apparatus shown in FIG. 3B and 3C are a front view and a rear view, respectively, of the pitch adjustment device for the print head shown in FIG. 3A. As shown in the drawing, the print head pitch adjusting apparatus 1 of the present invention is used in an ink jet printer, for example, a large ink jet printer (Wide Format Inkjet printer), but is not limited thereto. The print head pitch adjusting device 1 is installed on the slide rail 10 of the ink jet printer and is opposed to the print terrace 2 of the ink jet printer so as to adjust the pitch D between the print head 31 of the ink cartridge 3 and the print medium 4. Installed. The print head pitch adjusting device 1 includes a sliding base 11 and an ink cartridge frame 12. The sliding base 11 has a top side 111, a bottom side 112, a first bonding surface 113, and at least one linear sliding block 114, and the linear sliding block 114 is installed on the first bonding surface 113 so as to face each other. The linear sliding block 114 is installed so that the sliding base 11 is fitted to the slide rail 10, and is installed so that the sliding base 11 slides along the slide rail 10. The ink cartridge frame 12 includes a storage groove 121, a bonding wall 122, a clamping unit 123, a variable radius convex wheel 124, a drive gear group 125, and an elastic element 126. The storage groove 121 is configured to store at least the ink cartridge 3, and the ink cartridge 3 includes the print head 31. The bonding wall 122 has a second bonding surface 1221 and an adjustment surface 1222 on opposite sides, respectively, and the second bonding surface 1221 is opposed to the first bonding surface 113 of the sliding base 11. The clamping unit 123 is connected to the sliding base 11 and the ink cartridge frame 12 and selectively moves the ink cartridge frame 12 with respect to the sliding base 11 by clamping the sliding base 11 and the ink cartridge frame 12. Limit. The radius variable convex ring 124 is installed on the second bonding surface 1221 and has an outer peripheral edge 124 a that abuts on the top side 111 of the sliding base 11. The elastic element 126 is installed so as to be connected to the ear portion 1223 of the ink cartridge frame 12 and the bottom 112 of the sliding base 11, thereby pressing the sliding base 11 upward and the outer peripheral edge 124 a of the variable radius convex ring 124. Always presses the top 111 of the sliding base 11, and the ear portion 1223 is formed by extending the second bonding surface 1221 of the bonding wall 122 outward. The drive gear group 125 is installed on the adjustment surface 1222 and is coaxially connected to the variable radius convex wheel 124 and can be rotated synchronously. The drive gear group 125 rotates the variable radius convex wheel 124 in conjunction with the ink cartridge frame 12. The height of the ink cartridge 3 with respect to the sliding base 11 is adjusted, thereby adjusting the pitch between the print head 31 of the ink cartridge 3 and the print medium 4.

In this embodiment, the bonding wall 122 is further provided with at least a guide groove 1224, and the sliding base 11 has guide protrusions 115 provided on the first bonding surface 113 so as to face at least the guide groove 1224. Have. When the first bonding surface 113 and the second bonding surface 1221 are bonded, the guide cartridge 115 is accommodated in the corresponding guide groove 1224 so that the ink cartridge frame 12 moves up and down with respect to the sliding base 11. Limit what you do. In the present embodiment, the extending directions of the guide groove 1224 and the guide protrusion 115 are perpendicular to the extending direction of the slide rail 10, that is, the slide rail 10 extends along the X-axis direction. The protrusion 115 extends along the Z-axis direction to restrict the ink cartridge frame 12 from moving along the Z-axis direction with respect to the sliding base 11. 11 is restricted from moving in the X-axis direction.

In this embodiment, the clamping unit 123 includes at least two auxiliary clamping members 1231 and one clamping arm 1232, and the bonding wall 122 includes one through groove 1225 and at least two concave grooves 1226. The two concave grooves 1226 are located on the second bonding surface 1221 and are located on both sides of the through groove 1225, and include at least two guide holes 116 on the sliding base 11. At least two auxiliary clamping members 1231 are installed adjacent to the top side 111 of the sliding base 11. Each auxiliary clamping member 1231 includes a screw 1231a, a clamping block 1231b, and a spring 1231c, and the screw 1231a is bonded. By passing through the bonding wall 122 from the adjustment surface 1222 of the wall 122 and through the guide hole 116 of the sliding base 11, it is clamped to one end of the clamping block 1231b, and the other end of the clamping block 1231b is a corresponding concave groove. 1226 is stored. The spring 1231c is installed so as to cover the corresponding screw 1231a. The guide hole 116 of the bonding wall 122 realizes a function of limiting the movement of the ink cartridge frame 12 in the Z-axis direction with respect to the sliding base 11 in order to allow the screw 1231a provided therethrough to move in the hole. Can do. Further, the spring 1231c provides a suitable pressure to bond the bonding wall 112 of the ink cartridge frame 12 and the sliding base 11 together. The auxiliary clamping members 1231 installed on both sides allow the ink cartridge frame 12 to move smoothly in the Z-axis direction with respect to the sliding base 11, and the ink cartridge frame 12 and the sliding base 11 are displaced or spaced in the Y-axis direction. Ensure that no occurrence occurs.

In this embodiment, the ink cartridge frame 12 further includes a fastening member 1232b, the fastening member 1232b is installed at the lower edge of the second bonding surface 1221, and the sliding base 11 further includes a positioning groove 112a. 112a is installed on the other surface facing the first bonding surface 113. The clamping arm 1232 has a rotating shaft end 1232a and a torque arm end portion 1232c. The rotating shaft end 1232a is pivotally attached to the bottom of the bonding wall 122 of the ink cartridge frame 12 via a fastening member 1232b and is slidable. 11 is adjacent to the bottom 112 of the sliding base 11 and extends from the bottom 112 of the sliding base 11 to the top 111 of the sliding base 11 through the localization groove 112 a of the sliding base 11. Further, the torque arm end portion 1232 c of the clamping arm 1232 passes through the through groove 1225 of the bonding wall 122 and is located on the same side as the adjustment surface 1222. The clamping arm 1232 is configured such that the clamping arm 1232 slides by applying a force action to the torque arm end portion 1232c using the lever principle with the rotating shaft end 1232a pivotally attached to the fastening member 1232b as an axis. Not only can the positioning groove 112a on the bottom side 112 of the base 11 be pressed or detached from the positioning groove 112a on the bottom side 112 of the sliding base 11, but the ink cartridge frame 12 and the sliding base 11 can be selectively fixed. Thus, the movement of the ink cartridge frame 12 relative to the sliding base 11 can be restricted.

In this embodiment, the first bonding surface 113 of the sliding base 11 and the second bonding surface 1221 of the bonding wall 122 of the ink cartridge frame 12 are bonded to each other by three force action points. Here, at least two auxiliary clamping members 1231 are installed adjacent to the top side 111 of the sliding base 11, and the second bonding surface 1221 of the bonding wall 122 of the ink cartridge frame 12 is the sliding base 11. It abuts in the direction of the first bonding surface 113. The clamping arm 1232 has a rotating shaft end 1232a pivotally attached to the fastening member 1232b as an axis, receives a force action at the end of the torque arm 1232c, and is positioned by the clamping arm 1232 on the bottom 112 of the sliding base 11. Press 112a. Thereby, the 1st bonding surface 113 of the sliding base 11 and the 2nd bonding surface 1221 of the bonding wall 122 of the ink cartridge frame 12 mutually bond by the three force action points mentioned above. In this embodiment, the distance from the torque arm end portion 1232c of the clamping arm 1232 to the rotating shaft end 1232a is larger than the distance from the connection point between the clamping arm 1232 and the positioning groove 112a to the rotating shaft end 1232a. By applying a relatively small acting force to the torque arm end portion 1232c to obtain a relatively large clamping force at the connection point described above, the clamping arm 1232 is restricted from moving with respect to the sliding base 11 of the ink cartridge frame 12. It can be used as a mechanism. In one embodiment, when the clamping arm 1232 is detached from the positioning groove 112a, the driving gear group 125 causes the radius variable convex wheel 124 to roll in conjunction with the outer peripheral edge 124a of the radius variable convex wheel 124. The height of the ink cartridge frame 12 with respect to the sliding base 11 is adjusted. When the clamping arm 1232 comes into contact with the localization groove 112a, the drive gear group 125 cannot roll the radius variable convex ring 124 in conjunction with it.

In this embodiment, the variable radius convex wheel 124 corresponds to different radii at different angles, and the variable radius convex wheel 124 is preferably a cochlear convex wheel. The distance of the ink cartridge frame 12 to the sliding base 11 is related to the radius corresponding to the connection point where the outer peripheral edge 124a of the variable radius convex ring 124 abuts on the top side 111 of the sliding base 11, and the radius is variable corresponding to a different connection point. Since the radius of the convex wheel 124 is different, the pitch of the print head 31 and the print medium 4 can be adjusted by causing the drive gear group 125 to roll the variable radius convex wheel 124 in an interlocking manner.

In this embodiment, the print head pitch adjusting apparatus 1 further includes a motor 127 and a solenoid switch 128, and the motor 127 is installed in the ink cartridge frame 12 and connected to the drive gear group 125 to drive the drive gear group 125. To do. The solenoid switch 128 is installed in the ink cartridge frame 12 and includes an operating portion 128a. The 128a is connected to the torque arm end portion 1232c of the clamping arm 1232 so that the clamping arm 1232 has a stereotaxic groove on the bottom side 112 of the sliding base 11. The ink cartridge frame 12 and the sliding base 11 are selectively fixed using the clamping arm 1232 by controlling the contact with the 112a or detaching from the localization groove 112a of the bottom 112 of the sliding base 11. . In the present embodiment, automatic adjustment of the pitch between the print head 31 and the print medium 4 can be realized by installing the motor 127 and the solenoid switch 128.

FIG. 3D is a front view of a partial structure of the pitch adjustment device for the print head shown in FIG. 3A. In this embodiment, the drive gear group 125 includes a first gear 1251, a second gear 1252, a third gear 1253, and a worm 1254. The first gear 1251 is coaxially connected to the variable radius convex wheel 124 and can be rotated synchronously. . The second gear 1252 and the third gear 1253 are coaxially connected and can rotate synchronously, the second gear 1252 and the third gear 1253 are a single member, and the first gear 1251 and the third gear 1253 are By meshing, the third gear 1253 rotates the first gear 1251 in conjunction. The worm 1254 is directly connected to the drive shaft of the motor 127. When the worm 1254 and the second gear 1252 are engaged with each other, the worm 1254 is interlocked when the motor 127 is operated, and the worm 1254 is linked to the second gear 1252 and the third gear. 1253 is rotated in conjunction with each other, whereby the first gear 1251 is rotated in conjunction with each other. Further, the drive gear group 125 can provide adjustment accuracy and a large torque by the output of the motor 127 interlocking with the variable radius convex wheel 124 after deceleration by the drive gear group 125 as a reduction mechanism. In one embodiment, the diameter of the first gear 1251 is larger than the diameter of the second gear 1252, and the diameter of the second gear 1252 is larger than the third gear 1253, but is not limited thereto.

4A and 4B are operation relation diagrams of the clamping unit of the print head pitch adjusting apparatus according to the present invention, respectively. As shown in FIGS. 3A, 3B, 3C, 3D, 4A, and 4B, the solenoid switch 128 is installed on the top side of the ink cartridge frame 12, and the operating portion 128a and the adjustment surface 1222 are located on the same side. . The torque arm end portion 1232c of the clamping arm 1232 extends through the through hole 1225 of the bonding wall 122 and extends to the operating portion 128a of the solenoid switch 128. In one embodiment, the clamping arm 1232 further includes a spring 1232e and a stereotaxic projection 1232d, and the spring 1232e fits the stereotaxic projection 1232d and abuts the adjustment surface 1222 and the clamping arm 1232. If the solenoid switch 128 is a state of not being activated, as shown in FIG. 4A, operation unit 128a of the solenoid switch 128 extends out of the solenoid switch 128 body, the torque arm end 1232c of the clamping arms 1232 operate Since the portion is connected to the portion 128 a, the portion of the clamping arm 1232 close to the rotating shaft end 1232 a is brought into contact with the localization groove 112 a on the bottom side 112 of the sliding base 11, so that the ink cartridge frame 12 is in contact with the sliding base 11. Cannot move in the Z-axis direction. When the solenoid switch 128 being activated, as shown in FIG. 4B, the actuating portion 128a of the solenoid switch 128 returns to the solenoid switch 128 body, the torque arm end 1232c of the clamping arm 1232 is connected to the operating section 128a Therefore, the portion of the clamping arm 1232 close to the rotating shaft end 1232a is detached from the localization groove 112a on the bottom 112 of the sliding base 11, and the ink cartridge frame 12 moves in the Z-axis direction with respect to the sliding base 11. Can do. In this case, the motor 127 drives and rotates the drive gear group 125, rotates the radius variable convex wheel 124 in conjunction with the drive gear group 125, and the outer peripheral edge 124 a of the radius variable convex wheel 124 has a different connection point. By abutting the top side 111, the height of the ink cartridge 12 with respect to the sliding base 11 is adjusted, and the adjustment of the pitch between the print head and the print medium is realized.

5A and 5B are a front view and a rear view, respectively, when the ink cartridge frame of the print head pitch adjusting apparatus of the present invention is adjusted to the lowest point. 6A and 6B are a front view and a rear view, respectively, when the ink cartridge frame of the print head pitch adjusting apparatus of the present invention is adjusted to the highest point. When adjusting the height of the ink cartridge frame 12 with a pitch adjusting apparatus 1 of the print head, first solenoid switch 128 is activated, this time, the actuating portion 128a of the solenoid switch 128 returns to the solenoid switch 128 the body, the actuating portion 128a is interlocked with the clamping arm 1232 and detached from the localization groove 112a of the bottom 112 of the sliding base 11, and at this time, as shown in FIG. The gear group 125 rotates the variable radius convex wheel 124 in conjunction with the adjustment of the height of the ink cartridge frame 12. In this embodiment, the variable radius convex wheel 124 has a maximum radius R2 and a minimum radius R1, and the outer peripheral edge 124a is formed to be reduced from the maximum radius R2 to the minimum radius R1. When the outer peripheral edge 124a of the variable radius convex ring 124 abuts on the top side 111 of the sliding base 11 at the connection point of the minimum radius R1, the difference in relative height between the sliding base 11 and the ink cartridge frame 12 is the smallest. The results are as shown in FIGS. 5A and 5B. When the outer peripheral edge 124a of the variable radius convex ring 124 abuts on the top side 111 of the sliding base 11 at the connection point of the maximum radius R2, the difference in relative height between the sliding base 11 and the ink cartridge frame 12 is the largest. The results are as shown in FIGS. 6A and 6B. In one embodiment, the top 11 of the sliding base 11 has a limiting block 117, and the variable radius convex ring 124 further has a blocking portion 124b disposed between the maximum radius R2 and the minimum radius R1, By providing the blocking portion 124b and the limit block 117, the rolling range of the variable radius convex wheel 124 can be limited.

In the above-described embodiment, the print head pitch adjusting device 1 further includes the measurement unit 129 installed on the adjustment surface 1222 of the bonding wall 122 corresponding to the drive gear group 125, and the measurement unit 129 is a drive gear group. The rolling angle of the variable radius convex wheel 124 by 125 is measured. The motor 127, the solenoid switch 128, and the measurement unit 129 are electrically connected to a control unit (not shown). The measurement unit 129 transmits a measurement result to the control unit, and the control unit executes the motor 127 based on the measurement result. Control the stop. In one embodiment, the measurement unit 129 includes a measurement unit 129a and a rolling unit 129b, and the rolling unit 129b, the driving gear group 125, and the radius variable convex wheel 124 are coaxially connected and can be rotated synchronously. When the ink cartridge frame 12 of the print head pitch adjusting device 1 is adjusted to the lowest point (shown in FIG. 5A) or highest point (shown in FIG. 6A), the rolling unit 129b of the measuring unit 129 is detected by the measuring unit 129a. At this time, the control unit controls the motor 127 to stop so that the drive gear group 125 cannot roll in the original rolling direction any more, so that damage to the members caused by excessive rolling of the motor 127 occurs. Can be prevented.

FIG. 7 is a structural diagram of the print head pitch adjusting apparatus according to the second embodiment of the present invention. In this embodiment, the print head pitch adjusting apparatus 1a is the print head pitch adjusting apparatus shown in FIGS. 2A to 2C, 3A to 3D, 4A to 4B, 5A to 5B, 6A and 6B. 1, the same member symbols represent the same members, and the description of the structure and function is omitted. Compared to the embodiment described above, in the print head pitch adjusting apparatus 1a, the adjustment knob 5 is used instead of the motor 127 of the embodiment described above, and the solenoid switch 128 and the measurement unit 129 are not installed. The adjustment knob 5 has a tooth portion, and the tooth portion meshes with the second gear 1252 of the gear group 125, thereby manually rotating the adjustment knob 5 to operate the drive gear group 125. The radius variable convex ring 124 rolls by interlocking. After the user manually moves the clamping arm 1232 and removes it from the bottom 112 localization groove 112a of the sliding base 11, the user directly manually rotates the adjustment knob 5 to operate the drive gear group 125, thereby driving the drive gear. The height of the ink cartridge frame 12 relative to the sliding base 11 is adjusted by rolling the variable radius convex wheel 124 in conjunction with the group 125.

FIG. 8 is a structural diagram of a pitch adjusting device for a print head according to a third embodiment of the present invention. In this embodiment, the print head pitch adjusting apparatus 1b is the print head pitch adjusting apparatus shown in FIGS. 2A to 2C, 3A to 3D, 4A to 4B, 5A to 5B, 6A and 6B. 1, the same member symbols represent the same members, and the description of the structure and function is omitted. Compared to the above-described embodiment, in the print head pitch adjusting apparatus 1b, the adjustment knob 5 is used instead of the motor 127 of the above-described embodiment, and the measurement unit 129 is not installed. The adjustment knob 5 has a tooth portion, and the tooth portion meshes with the second gear 1252 of the gear group 125, thereby manually rotating the adjustment knob 5 to operate the drive gear group 125. The radius variable convex ring 124 rolls by interlocking. Further, the print head pitch adjusting device 1 b further includes a gear cover 6 and a sensitive unit 7. By the gear cover 6 is installed outside the adjusting knob 5, store houses the adjusting knob 5 when not in use adjustment knob 5. By sensing unit 7 for connecting the solenoid switch 128 is installed in the gear cover 6 so as to face the position of the adjusting knob 5, activates the solenoid switch 128 when the gear cover 6 is desorbed also exposed from the adjustment knob 5 Then, the actuating part 128a is pulled, and the actuating part 128a pulls the clamping 1232 again to detach the localization groove 112a on the bottom 112 of the sliding base 11. At this time, the user directly manually rotates the adjustment knob 5 to operate the drive gear group 125 and rolls the variable radius convex wheel 124 in conjunction with the drive gear group 125, so that the sliding base 11 of the ink cartridge frame 12 is moved. Adjust the height against. Of course, the present invention is not limited to the setting position and operation method of the sensitive unit 7 described above, but it is sufficient that the solenoid switch 128 can be activated when the adjustment knob 5 performs adjustment work, and the description thereof will be omitted.

According to the above, the pitch adjustment device for the print head used in the ink jet printer provided by the present invention can adjust the pitch between the print head and the print medium precisely and accurately, is low in cost, is easy to maintain, is manufactured. Is simple, highly stable, and can meet the requirements of stepless fine adjustment and control. In addition, the stability of the convex wheel, the convenience of the gear group, and the advantages of the spring and other designs overcome the backlash problem of the prior art, and are easy to operate and do not require a complicated mechanism to achieve precise fine adjustment. can do. In addition, because it can be easily installed with sensitive elements by installing it in electrical equipment (for example, motors and solenoid switches ), the target value can be obtained by measuring the distance to the paper immediately and transmitting a signal to the control unit. To achieve the purpose of automatic adjustment by controlling the motor. Moreover, the print head pitch adjusting device of the present invention can be easily arranged in a high-stage ink jet printer on the premise that the increase in cost is refrained, and the competitiveness of the product can be enhanced.

The present invention can be appropriately modified by those skilled in the art within the scope of the claims, but in any case, the scope of the present invention does not depart from the scope of protection.

DESCRIPTION OF SYMBOLS 1 Print head pitch adjustment apparatus 10 Slide rail 11 Sliding base 111 Top side 112 Bottom side 112a Orientation groove 113 First bonding surface 114 Linear sliding block 115 Guide convex part 116 Guide hole 117 Restriction block 12 Ink cartridge frame 121 Storage groove 122 bonding wall 1221 second bonding surface 1222 adjustment surface 1223 ear part 1224 guide groove 1225 through groove 1226 concave groove 123 clamping unit 1231 auxiliary clamping member 1231a screw 1231b clamping block 1231c spring 1232 clamping arm end 1232a rolling Shaft end portion 1232b Clamping member 1232c Torque arm end portion 1232d Positional convex portion 1232e Spring 124 Radius variable convex wheel 124a Outer peripheral edge 124b Blocking portion 125 Drive gear group 1251 First gear 1252 Second gear 1253 Third gear 1254 Worm 126 Elastic element 127 Motor 128 Solenoid switch 128a Actuating unit 129 Measuring unit 129a Measuring unit 129b Rolling unit 2 Printing terrace 3 Ink cartridge 31 Print head 4 Print medium 5 Adjustment knob 6 Gear cover 7 Sensing unit
D distance
R1 Minimum radius
R2 maximum radius

Claims (12)

In a print head pitch adjusting device including a sliding base and an ink cartridge frame,
The sliding base has a top side, a bottom side and a first bonding surface,
The ink cartridge frame includes a storage groove, a bonding wall, a clamping unit, an elastic element, a radius variable convex wheel, and a drive gear group.
The storage groove stores at least one ink cartridge, and the ink cartridge has a print head,
The bonding wall has a second bonding surface and an adjustment surface, the second bonding surface is opposed to the first bonding surface,
The clamping unit is connected to the sliding base and the ink cartridge frame, and selectively clamps the sliding base and the ink cartridge frame to restrict movement of the ink cartridge frame with respect to the sliding base. And
The elastic element is connected to the bottom of the ink cartridge frame and the sliding base,
The radius variable convex ring is installed on the second bonding surface, and has an outer peripheral edge, abutting on the top side of the sliding base,
The drive gear group is installed on the adjustment surface and is coaxially connected to the radius variable convex wheel so as to be capable of synchronous rotation. The drive gear group rotates the radius variable convex wheel in conjunction with the ink cartridge. Adjusting the height of the print head relative to the sliding base. The print head pitch adjusting device is installed in an ink jet printer, and the ink jet printer includes a slide rail and a printing terrace, and the print head pitch adjusting device is installed on the slide rail so as to face the printing terrace. The sliding base includes at least a linear sliding block, and the linear sliding block is disposed so as to face the first bonding surface; and The print head pitch adjusting apparatus according to claim 1, wherein the sliding base is installed so that the sliding base is fitted to the slide rail and the sliding base slides along the slide rail. . The bonding wall has at least a guide groove, the sliding base has at least a guide protrusion, the guide protrusion is disposed on a first bonding surface and is opposed to the guide groove, and the guide protrusion The print head pitch adjusting device according to claim 1, wherein the vertical movement of the ink cartridge frame relative to the sliding base is controlled by being housed in the guide groove. The clamping unit includes at least two auxiliary clamping members, the bonding wall includes at least two concave grooves located on the second bonding surface, and the sliding base includes at least two guide holes; The at least two auxiliary clamping members are installed adjacent to the top side of the sliding base;
Each auxiliary clamping member includes a screw, a clamping block, and a spring,
The screw passes through the bonding wall from the adjustment surface of the bonding wall, passes through the guide hole of the sliding base,
One end of the clamping block is fastened to the screw, the other end of the clamping block is stored relative to the concave groove,
The print head pitch adjusting apparatus according to claim 1, wherein the spring is provided so as to cover the screw. The clamping unit includes a clamping arm, the ink cartridge frame includes a fastening member installed at a lower edge of the second bonding surface, the bonding wall includes a through groove, and the sliding base includes the sliding base. Including a stereotaxic groove installed on the other surface facing the first bonding surface,
The clamping arm includes a rotating shaft end and a torque arm,
The rolling shaft end is pivotally attached to the bottom side of the bonding wall of the ink cartridge frame via a fastening member, is adjacent to the bottom side of the sliding base, and extends from the bottom side of the sliding base to the sliding base. Through the stereotaxic groove of
The torque arm passes through the through groove of the bonding wall and is located on the same side as the adjustment surface,
The clamping arm selectively fixes the ink cartridge frame and the sliding base by pressing or detaching the positioning groove of the sliding base, and restricts the movement of the ink cartridge frame with respect to the sliding base. The pitch adjusting apparatus for a print head according to claim 1. 6. The solenoid switch according to claim 5, further comprising a solenoid switch and an operating portion, wherein the solenoid switch is installed in an ink cartridge frame, and the operating portion and a torque arm end portion of the clamping arm are connected to each other. Print head pitch adjuster. The printhead pitch adjusting apparatus according to claim 1, further comprising a motor that is installed in the ink cartridge frame and is connected to the drive gear group to operate the drive gear group. The drive gear group includes a first gear, a second gear, a third gear, and a worm,
The first gear is coaxially connected to the variable radius convex wheel and is capable of synchronous rotation.
The third gear is coaxially coupled to the second gear and is capable of synchronous rotation, and meshes with the first gear;
The worm meshes with the second gear and is coupled to the motor;
The print head according to claim 7, wherein the motor operates in conjunction with the worm, and the worm rolls the first gear by interlocking the second gear and the third gear. Pitch adjuster. The print head according to claim 1, further comprising an adjustment knob installed on an adjustment surface, wherein the adjustment knob is connected to the drive gear group to operate the drive gear group. Pitch adjuster. The print head pitch adjusting apparatus according to claim 1, wherein the variable radius convex ring has a maximum radius and a minimum radius, and the outer peripheral edge is formed by gradually decreasing from the maximum radius to the minimum radius. . The sliding base has a limit block, and the variable radius convex ring has a blocking portion installed between the maximum radius and the minimum radius, and the arrangement of the limit block and the blocking portion allows The print head pitch adjusting apparatus according to claim 10, wherein a rolling range of the variable radius convex ring is limited. It further includes a measurement unit, and the measurement unit is installed on the adjustment surface of the bonding wall and corresponds to the drive gear group, thereby measuring a rolling angle at which the drive gear group rolls the radius variable convex ring. The pitch adjusting device for a print head according to claim 1, wherein: