Patent Publication Number: US-7914135-B2

Title: Liquid cartridge and circuit board

Description:
BACKGROUND 
     1. Technical Field 
     The present invention relates to a liquid cartridge that has a circuit board, which has a memory device mounted on a rear surface thereof and is attached to an outer surface of the liquid cartridge in an insertion direction of a resin container main body to be inserted into and mounted on a cartridge mounting portion of a liquid consuming apparatus, and a connection terminal, which is formed on a surface of the circuit board to be contactable with a connector provided in the cartridge mounting portion, thereby allowing the liquid consuming apparatus to read and write information with respect to the memory device. 
     2. Related Art 
     A liquid consuming apparatus includes all kinds of apparatuses that consume a liquid supplied from a predetermined portion during the operation. As a representative liquid jetting apparatus, a liquid ejecting apparatus that ejects liquid droplets from an ejecting head is exemplified. Moreover, the liquid ejecting apparatus is not limited to a recording apparatus, such as an ink jet recording apparatus, a copy machine, or a facsimile machine, which ejects ink from a recording head as a liquid ejecting head to a recording material, such as a recording sheet or the like. For example, the liquid consuming apparatus may be an apparatus that ejects a liquid for a specific purpose, instead of ink, from a liquid ejecting head corresponding to the above-described recording head to a material to be ejected corresponding to the recording material, and causes the liquid to be attached to the material to be ejected. In addition, the liquid ejecting head includes, in addition to the above-described recording head, a color material ejecting head that is used to manufacture color filters of a liquid crystal display or the like, an electrode material (conductive paste) ejecting head that is used to form electrodes of an organic electroluminescent (EL) display or a surface emission display (FED), a bioorganic compound ejecting head that is used to manufacture a bio-chip, a sample ejecting head that ejects a sample as a precision pipette, and so on. 
     The ink jet recording apparatus sends ink, which is stored in an ink cartridge mounted on a cartridge mounting portion in the apparatus to a recording head. The recording head ejects and coats ink droplets to a recording medium, such as a recording sheet or the like, thereby recording images or characters. 
     In the ink jet recording apparatus, the recording head controls the ejection of the ink droplets using heat or vibration. If idle printing occurs in a state where ink in the ink cartridge is exhausted and ink is not supplied, the recording head may be damaged. 
     Accordingly, in the ink jet recording apparatus, in order to prevent idle printing of the recording head, it is necessary to monitor the residual quantity of an ink liquid in the ink cartridge. 
     Further, when the use conditions, for example, full color photograph printing, monochrome text printing, and the like, are different from each other, a difference in color or quantity of an ink liquid to be consumed occurs. Accordingly, in a recent ink jet recording apparatus, some of a plurality of ink cartridges mounted on the apparatus is changed to the ink cartridges according to the use conditions. In such an ink jet recording apparatus, it is necessary to manage the use history regarding whether the ink cartridge mounted on the cartridge mounting portion is a new one or whether a previously used one is remounted. 
     From such a background, there is suggested an ink cartridge as shown in  FIGS. 7 and 8 . 
     An ink cartridge  1  includes a resin container main body  3  that is inserted into and mounted on a cartridge mounting portion  2  of an ink jet recording apparatus, and a circuit board (IC board)  4  that is mounted on an outer surface  3   a  in an insertion direction of the container main body  3  (an up and down direction in the drawings). 
     The container main body  3  is an injection-molded product formed of resin. Inside the container main body  3  is formed a liquid storage portion  3   b  that stores ink to be supplied to the ink jet recording apparatus. A liquid supply port  3   c  is formed at a lower surface of the container main body  3  so as to supply ink stored in the liquid storage portion  3   b  to the ink jet recording apparatus. 
     The circuit board  4  substantially has a rectangular plate shape. As shown in  FIG. 9 , a memory device (IC chip)  5  is mounted on a rear surface of the circuit board  4 . Connection terminals  7  are formed on a front surface of the circuit board  4  so as to serve as input/output terminals with respect to the memory device  5 . The connection terminals  7  are pressed into contact with electrical connector terminals  8  provided in the cartridge mounting portion  2  when the ink cartridge  1  is inserted into and mounted on the cartridge mounting portion  2 . Accordingly, a control circuit of the recording apparatus connected to the connector terminals  8  can read and write information with respect to the memory device  5 . 
     In such an ink cartridge  1 , it is possible to easily manage the ink residual quantity of the recording apparatus by writing information, such as the ink residual quantity or the use history, to the memory device  5 . 
     Until now, the circuit board  4  is attached to the container main body  3  by fitting bosses protruding from the outer surface  3   a  of the container main body  3  into mounting holes and thermally caulking the front ends of the bosses. 
     Specifically, the circuit board  4  is provided with an error absorption notched hole  4   a  and an oval positioning hole  4   b  as the mounting holes on the outer surface  3   a . The error absorption notched hole  4   a  is provided at the front end side in the insertion direction into the cartridge mounting portion  2  (in  FIG. 8 , on a lower side) to have an oval shape in the insertion direction. The oval positioning hole  4   b  is provided at the base end side in the insertion direction. Then, on the outer surface  3   a  of the container main body  3  are provided an oval boss  9  that substantially has an oval cross-sectional shape corresponding to the error absorption notched hole  4   a  and a circular boss  10  that substantially has a circular cross-sectional shape corresponding to the positioning hole  4   b.    
     Here, the bosses  9  and  10  are correspondingly fitted into the mounting holes  4   a  and  4   b  of the circuit board  4 , and then the front ends of the bosses  9  and  10  protruding from the front ends of the mounting holes  4   a  and  4   b  are thermally fastened. Then, the circuit board  4  is fixed to the outer surface  3   a  of the container main body  3 . 
     As shown in  FIGS. 7 and 8 , when a lever member  11  is provided on the outer surface  3   a , on which the circuit board  4  is provided, so as to anchor the container main body  3  to the cartridge mounting portion  2 , the connector terminals  8  are disposed to lean toward the front end side in the insertion direction so as not to interfere with the lever member  11  (see  FIG. 9 ). For this reason, the connection terminals  7  that are provided on the circuit board  4  are also disposed to lean toward the front end side in the insertion direction (that is, on the side of the underlying error absorption notched hole  4   a ) (for example, see Patent Document 1). 
     Patent Document 1: JP-A-2004-90624 
     However, the elution area of the oval boss  9  by thermal caulking is larger than that of the circular boss  10 , and as shown in an enlarged view of  FIG. 9 , a long eluted portion  9   a  is formed in the insertion direction. 
     In the known ink cartridge  1  in which the oval boss  9  is located at the front end side in the insertion direction, when the ink cartridge  1  is inserted into and mounted on the cartridge mounting portion  2 , the long eluted portion  9   a  may rub against the connector terminals  8 , which causes resin fractions. Then, the resin fractions may be stuck to the connection terminals  7 , and thus defective contact may occur between the connector terminals  8  and the connection terminals  7 . 
     In order to prevent the resin fractions, instead of the oval boss  9 , a circular boss having a small cross-sectional shape may be provided. In this case, however, the boss may interfere with other parts and be easily damaged at the front end side in the insertion direction into the cartridge mounting portion  2 , that is, at the corner of the cartridge main body  3 . Accordingly, a boss having an oval shape is formed in order to improve mechanical strength. 
     The error absorption notched hole  4   a , into which the oval boss  9  is fitted, is formed by a two-stage processing shown in  FIGS. 10A and 10B . That is, as shown in  FIG. 10A , first, a circular hole  12   a  is formed using a drill or the like. Then, a square hole  12   b  is punched by a punching die to extend to a lower edge of the board at the width of the circular hole  12   a . During punching the square hole  12   b , a positional shift Ks or a burr Kb easily occurs. 
     The error absorption notched hole  4   a  absorbs a size tolerance of the circuit board  4 , and thus its size is set in advance such that the oval boss  9  is loose-fitted thereinto. However, as described above, since the positional shift Ks or the burr Kb occurs, size accuracy is easily deteriorated. Accordingly, as shown in  FIG. 4B , when the circuit board  4  is positioned, deflection (positional shift) F 1  or F 2  occurs with the circular boss  10  as a rotation fulcrum. 
     As a result, positioning accuracy of the connection terminals  7  disposed on the side of the error absorption notched hole  4   a  having large deflection F 1  or F 2  is lowered, and defective contact may occur with respect to the connector terminals  8 . 
     SUMMARY 
     An object of the invention is to provide a liquid cartridge that can increase position accuracy of connection terminals on a circuit board to be mounted on an outer surface of a container main body and, when inserted into and mounted on a cartridge mounting portion of a liquid consuming apparatus, can suppress fractions from being generated when an eluted portion of a boss for fixing the circuit board to the container main body rubs against connector terminals in the cartridge mounting portion and reliably connect the connection terminals of the circuit board with the connector terminals. 
     According to a first aspect of the invention, a liquid cartridge mountable on a cartridge mounting portion of a liquid consuming apparatus, includes: a circuit board that is attached to an outer surface of the liquid cartridge in an insertion direction of the liquid cartridge into the cartridge mounting portion; and a connection terminal that is formed in the circuit board to be contactable with a connector provided in the cartridge mounting portion, wherein the circuit board has a positioning hole that is formed at a front end side in the insertion direction into the cartridge mounting portion, and an error absorption hole that is formed at a base end side in the insertion direction and has a larger opening area than that of the positioning hole, and the positioning hole is engaged with a positioning boss that is provided in the liquid cartridge, the error absorption hole is engaged with an error absorption boss that is provided in the liquid cartridge, and the circuit board is fixed to a container main body by thermally caulking the bosses. 
     In the liquid cartridge according to the first aspect of the invention, the circuit board may be configured such that the connection terminal is formed between the positioning hole and the error absorption hole so as to be close to the positioning hole. 
     In the liquid cartridge according to the first aspect of the invention, the error absorption hole may be a notch or may be a through hole that passes through the circuit board. 
     According to a second aspect of the invention, a circuit board attachable to a liquid cartridge, includes: a connection terminal; a positioning hole; and an error absorption hole that has a larger opening area than that of the positioning hole, wherein the connection terminal is formed between the positioning hole and the error absorption hole to be close to the positioning hole. 
     In the circuit board according to the second aspect of the invention, the error absorption hole may be a notch or may be a through hole that passes through the circuit board. 
     According to a third aspect of the invention, a liquid cartridge, includes: a circuit board that is attached to an outer surface of the liquid cartridge in an insertion direction of a resin container main body to be inserted into and mounted on a cartridge mounting portion of a liquid consuming apparatus; and a connection terminal that is formed in the circuit board to be contactable with a connector of the cartridge mounting portion, wherein the circuit board has a circular positioning hole that is formed at a front end side in the insertion direction into the cartridge mounting portion, and an oval error absorption notched hole that is formed at a base end side in the insertion direction, and the circular positioning hole is engaged with a circular boss that is provided in the container main body, the error absorption notched hole is engaged with an oval boss that is provided in the container main body, and the circuit board is fixed to the container main body by thermally caulking the bosses. 
     In the liquid cartridge according to the third aspect of the invention, the circuit board may be configured such that the connection terminals are formed between the circular positioning hole and the error absorption notched hole to be close to the circular positioning hole. 
     In the liquid cartridge according to the invention, it is common to the related art in that the fixation of the circuit board to the container main body is performed by engaging two holes formed in the circuit board with the bosses at the corresponding places of the container main body and thermally caulking the front ends of the bosses. However, in the liquid cartridge according to the invention, the hole that is formed at the front end side in the insertion direction of the circuit board is set as the positioning hole, and the hole that is formed at the base end side in the insertion direction is set as the error absorption hole having a larger opening area than the positioning hole. Then, the holes are engaged with the positioning boss and the error absorption boss. For this reason, when the liquid cartridge is inserted into and mounted on the cartridge mounting portion of the liquid consuming apparatus, a boss that rubs against the connector terminals in the cartridge mounting portion is the positioning boss having an eluted portion of a small area. Therefore, a distance at which the eluted portion rubs against the connector terminals when the liquid cartridge is inserted into the cartridge mounting portion is reduced. 
     As a result, fractions can be suppressed from being generated when the eluted portion of the boss for fixing the circuit board to the container main body rubs against the connector terminal in the cartridge mounting portion. Further, defective contact can be prevented from occurring since the fractions are stuck to the connection terminal or the like. Therefore, the circuit board can be reliably connected with the connector terminal. Then, it is possible to accurately manage the residual quantity of a liquid in the liquid cartridge by allowing the liquid consuming apparatus to read and write information with respect to a memory device mounted on the circuit board. 
     The circuit board is attached to the container main body such that the side of the error absorption hole is deflected with the position boss, which is fitted into the positioning hole provided at the front end side in the insertion direction, as the rotation fulcrum. Accordingly, the connection terminals are provided near the positioning hole having high position accuracy. Therefore, it is possible to increase position accuracy of the connection terminals with respect to the connector terminals. Further, it is possible to reliably connect the connection terminals of the circuit board with the connector terminals. 
     In the circuit board according to the invention, the connection terminals are formed between the positioning hole and the error absorption hole to be close to the positioning hole. Therefore, it is possible to increase position accuracy of the connection terminal with respect to the connector terminal. Further, it is possible to reliably connect the connection terminal of the circuit board with the connector terminals. 
     The present disclosure relates to the subject matter contained in Japanese patent application Nos. 2006-085319 filed on Mar. 27, 2006 and 2007-67613 filed on Mar. 15, 2006, which are expressly incorporated herein by reference in its entirety. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The invention will be described with reference to the accompanying drawings, wherein like numbers reference like elements. 
         FIG. 1  is a perspective view of an ink cartridge as an embodiment of a liquid cartridge according to the invention. 
         FIG. 2  is a front view of a container outer surface on which a circuit board of the ink cartridge shown in  FIG. 1  is provided. 
         FIG. 3  is a cross-sectional view showing essential parts in a state where the ink cartridge shown in  FIG. 1  is mounted on a cartridge mounting portion, and an enlarged view of the essential parts. 
         FIG. 4A  is an explanatory view of position accuracy of connection terminals on a container main body shown in  FIG. 2 . 
         FIG. 4B  is an explanatory view of position accuracy of connection terminals on a known ink cartridge. 
         FIG. 5A  is a cross-sectional view illustrating the shape of a circular boss shown in  FIG. 2 . 
         FIG. 5B  is a cross-sectional view showing the shape of another circular boss. 
         FIG. 6A  is a front view of a circuit board showing a modification of a positioning boss and an error absorption boss. 
         FIG. 6B  is a front view of a circuit board showing a modification of an error absorption hole. 
         FIG. 7  is a perspective view of an ink cartridge as an example of a known liquid cartridge. 
         FIG. 8  is a front view of a container outer surface on which a circuit board of the ink cartridge shown in  FIG. 7  is provided. 
         FIG. 9  is a cross-sectional view showing essential parts in a state where the ink cartridge shown in  FIG. 7  is mounted on a cartridge mounting portion, and an enlarged view of the essential parts. 
         FIG. 10A  is a plan view of a circuit board showing a first step of a processing of an error absorption notched hole. 
         FIG. 10B  is a plan view of a circuit board showing a second step of the processing. 
     
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     Hereinafter, preferred embodiments of a liquid cartridge according to the invention will be described in detail with reference to the drawings. 
       FIG. 1  is a perspective view of an ink cartridge as an embodiment of the liquid cartridge according to the invention.  FIG. 2  is a front view of a container outer surface on which a circuit board of the ink cartridge shown in  FIG. 1  is provided.  FIG. 3  is a cross-sectional view showing essential parts in a state where the ink cartridge shown in  FIG. 1  is mounted on a cartridge mounting portion, and an enlarged view of the essential parts. 
     An ink cartridge  21  according to this embodiment includes a container main body  23  that is formed of resin and inserted into and mounted on a cartridge mounting portion  2  of an ink jet recording apparatus as a liquid consuming apparatus, and a circuit board (IC board)  24  that is mounted on a vertical outer surface  23   a  in an insertion direction of the container main body  23  (in an up and down direction in the drawing). 
     The container main body  23  is an injection-molded article formed of resin. Inside the container main body  23  is formed a liquid storage portion  23   b  that stores ink to be supplied to the ink jet recording apparatus. A liquid supply port  23   c  is formed at a lower surface of the container main body  23  so as to supply ink stored in the liquid storage portion  23   b  to the ink jet recording apparatus. On the outer surface  23   a  on which the circuit board  24  is mounted, a lever member  11  is integrally formed to be engaged with an engagement mechanism (not shown) provided in the cartridge mounting portion  2  above a mounting position of the circuit board  24 , thereby fixing the ink cartridge  21  to the cartridge mounting portion  2 . 
     The circuit board  24  substantially has a rectangular plate shape. As shown in  FIG. 3 , a memory device (IC chip)  5  is mounted on a rear surface of the circuit board  24 . Connection terminals  7  are formed on a front surface of the circuit board  24  so as to serve as input/output terminals of the memory device  5 . 
     In this embodiment, like the related art, the circuit board  24  is attached to the container main body  23  by fitting two bosses protruding from the outer surface  23   a  of the container main body  23  into two holes (hereinafter, also referred to as mounting holes) formed in the circuit board  24  and thermally caulking the front ends of the bosses. 
     Meanwhile, as shown in  FIG. 2 , in the circuit board  24 , as the mounting holes with respect to the outer surface  23   a , a circular positioning hole  24   a  is provided at a front end side in the insertion direction into the cartridge mounting portion  2  (a lower side in  FIG. 2 ), and an error absorption hole  24   b  (notch) is provided at a base end side in the insertion direction to be notched in an oval shape in the insertion direction. 
     On the outer surface  23   a  of the container main body  23 , a circular boss (positioning boss)  26  is provided at the front end side in the insertion direction to have a substantially circular cross-sectional shape corresponding to the positioning hole  24   a , and an oval boss (error absorption boss)  27  is provided at the base end side in the insertion direction to have a substantially oval shape corresponding to the error absorption hole  24   b.    
     In this embodiment, as shown in  FIG. 5A  or  5 B, the circuit boss  26  that is provided at a corner of the container main body  23  is formed such that a base portion has a large diameter, thereby improving mechanical strength. That is, in  FIG. 5A , a hem portion as the base portion of the circuit boss  26  is formed as an R portion having a gradually increasing diameter. When the R portion is simply formed, it is necessary to form a release portion of the R portion in the mounting hole of the circuit board  24  into which the boss is fitted. Accordingly, a counter bore  26   a  is formed on the outer surface  23   a  of the container main body  23  to be connected to the R portion. Similarly, in  FIG. 5B , a circular boss  26  has a step  26   b  in the base portion, and a counter bore  26   c  is formed around the step  26   b.    
     With this configuration, in the related art, a boss that is provided at the corner of the container main body  3  and likely to be damaged due to the interference with other parts can have increased mechanical strength. 
     Next, the bosses  26  and  27  are correspondingly fitted into the mounting holes  24   a  and  24   b  of the circuit board  24 , and then the front ends of the bosses  26  and  27  protruding from the front ends of the individual mounting holes  24   a  and  24   b  are thermally fastened, thereby fixing the circuit board  24  to the container main body  23 . 
     In the circuit board  24  of this embodiment, the connection terminals  7  are formed between the positioning hole  24   a  and the error absorption notched hole  24   b . Further, the individual connection terminals  7  are collectively disposed to be close to the positioning hole  24   a  at the front end side in the insertion direction. 
     This is because the lever member  11  is provided on the outer surface  23   a  of the container main body  23  on which the circuit board  24  is provided, and connector terminals  8  serving as a connector provided in the cartridge mounting portion  2  is disposed to lean toward the front end side in the insertion direction so as not to interfere with the lever member  11 . 
     As shown in  FIG. 3 , when the ink cartridge  21  is inserted into and mounted on the cartridge mounting portion  2 , the connection terminals  7  on the circuit board  24  are pressed into contact with the electrical connector terminals  8  provided in the cartridge mounting portion  2 . Accordingly, a control circuit of the recording apparatus connected to the connector terminals  8  can read and write information with respect to the memory device  5 . 
     In such an ink cartridge  21 , it is possible to easily manage the ink residual quantity of the recording apparatus by writing information, such as the ink residual quantity or the use history, to the memory device  5 . 
     In the ink cartridge  21  of this embodiment described above, it is common to the related art in that the circuit board  24  is fixed to the container main body  23  by correspondingly fitting the bosses of the container main body  23  into the two mounting holes formed in the circuit board  24  and thermally caulking the front ends of the bosses. Meanwhile, in the ink cartridge  1  of this embodiment, a mounting hole that is formed at the front end side in the insertion direction of the circuit board  24  is set as the positioning hole  24   a , and a mounting hole that is formed at the base end side in the insertion direction is set as the error absorption hole  24   b  having a larger opening area than the positioning hole  24   a . Then, the circular boss  26  and the oval boss  27  are correspondingly fitted into the mounting holes. 
     For this reason, when the ink cartridge  21  is inserted into and mounted on the cartridge mounting portion  2  of the liquid consuming apparatus, a boss that rubs against the connector terminals  8  in the cartridge mounting portion  2  is the positioning boss having an eluted portion  26   a  of a small area, as shown in  FIG. 3 . Therefore, a distance at which the eluted portion  26   a  rubs against the connector terminals  8  when the ink cartridge  21  is inserted into the cartridge mounting portion  2  is reduced. 
     As a result, fractions can be suppressed from being generated when the eluted portion  26   a  of the boss for fixing the circuit board  24  to the container main body  23  rubs against the connector terminals  8  in the cartridge mounting portion  2 . Further, defective contact can be prevented from occurring since the fractions are stuck to the connection terminals  7  or the like. Therefore, the connection terminals  7  of the circuit board  24  can be reliably connected with the connector terminals  8 . Then, it is possible to accurately manage the residual quantity of a liquid in the ink cartridge  21  by allowing the ink jet recording apparatus to read and write information with respect to the memory device  5  mounted on the circuit board  24 . 
     As shown in  FIG. 4A , the circuit board  24  attached to the container main body  23  is configured such that the side of the error absorption notched hole  24   b  is deflected at a deflection width F 3  or F 4  with the circuit boss  26  fitted into the positioning hole  24   a  as a rotation fulcrum. Accordingly, position accuracy is lowered at a position closer to the error absorption notched hole  24   b.    
     However, like the above-described embodiment, if the connection terminals  7  are collected to be close to the positioning hole  24   a  at the front end side in the insertion direction, deflection can be suppressed from being generated in the connection terminals  7 . Therefore, it is possible to increase position accuracy of the connection terminals  7  with respect to the connector terminals  8 . As a result, it is possible to reliably connect the connection terminals  7  of the circuit board  24  with the connector terminals  8 . 
     In the liquid cartridge of the invention, the shapes of the positioning hole, the error absorption hole, the positioning boss, and the error absorption boss are not limited to the shapes of the above-described embodiment. Various shapes can be used without departing from the spirit of the invention. 
     For example, in a circuit board  124  shown in  FIG. 6A , a square positioning hole  124   a  is provided at the front end side in the insertion direction into the cartridge mounting portion  2  (on a lower side in  FIGS. 6A and 68 ), and an error absorption hole  124   b  is provided at the base end side in the insertion direction to be notched in a rectangular shape in the insertion direction. 
     On the outer surface  23   a  of the container main body  23 , a square boss (positioning boss)  126  is provided at the front end side in the insertion direction to have a substantially square cross-sectional shape corresponding to the positioning hole  124   a , and a rectangular boss (error absorption boss)  127  is provided at the base end side in the insertion direction to have a substantially rectangular shape corresponding to the error absorption hole  124   b.    
     In a circuit board  224  shown in  FIG. 6B , a circular positioning hole  224   a  is provided at the front end side in the insertion direction into the cartridge mounting portion  2 , and an oval error absorption hole  124   b  (through hole) is provided at the base end side in the insertion direction to have an oval shape in the insertion direction. 
     On the outer surface  23   a  of the container main body  23 , a circular boss (positioning boss)  26  is provided at the front end side in the insertion direction to have a substantially circular cross-sectional shape corresponding to the positioning hole  224   a , and an oval boss (error absorption boss)  27  is provided at the base end side in the insertion direction to have a substantially oval shape corresponding to the error absorption hole  224   b.    
     The use of the liquid cartridge according to the invention is not limited to the ink cartridge in the above-described embodiment. Further, the liquid consuming apparatus having the cartridge mounting portion, on which the liquid cartridge according to the invention is mounted, is not limited to the ink jet recording apparatus in the above-described embodiment. 
     Various liquid consuming apparatuses that have the cartridge mounting portion, on which the liquid cartridge is detachably mounted, and are supplied with the liquid stored in the liquid cartridge. Specific examples of the liquid consuming apparatus include an apparatus having a color material jetting head used in manufacturing color filters of a liquid crystal display or the like, an apparatus having an electrode material (conductive paste) jetting head used in forming electrodes of an organic electroluminescent (EL) display or a surface emission display (FED), an apparatus having a bioorganic compound jetting head used in manufacturing a bio-chip, an apparatus having a sample spraying head as a precision pipette, a textile printing apparatus, or a micro dispenser.