JPH05338326A - Printer - Google Patents

Abstract

PURPOSE:To provide a printer on which a printing head is mounted for materializing a conventional cooling function enabling highly-frequent continuous printing in a further reduced size and at lower cost. CONSTITUTION:A printer is constituted of a printing head 10 wherein it is controlled by an electric machine's signal and printing action is accompanied by heating, a shaft 20 fixed to the rear of the printing head 10, a fan 31 having a plurality of blades wherein they are turnable centering around the shaft 20 and possess the same rotary center as that of a fan driving gear 32 and an air blasting function and the fan driving gear 32 and the fan 31 are in monolithic structure, and a rack 41 which is geared with the fan driving gear 32 and a cog is arranged in a moving direction of the printing head 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus, and more particularly, to a printing apparatus which prints by reciprocating a mechanical dot head controlled by an electric signal.

[0002]

2. Description of the Related Art Conventional printers of this type rotate an air blower fan by an electromagnetic motor fixed to the back of the print head in order to suppress an abnormal temperature rise due to a high frequency printing operation, and generate an air flow near the outer circumference of the print head. By doing so, the heat generated from the inside of the print head is radiated into the air around the print head.

[0003]

In the printer having the above structure, the electromagnetic motor is fixed to the back of the print head, resulting in an increase in size of the print head. In addition, a large weight of the electromagnetic motor is added to the weight of the normal print head, which increases the weight of the entire print head, which imposes a heavy load on the drive system for reciprocating the print head. This increase in weight also increases the vibration of the entire printer due to the reciprocating movement of the print head. In addition, driving the electromagnetic motor increases the current consumption of the entire printer and increases the cost of the electromagnetic motor. The present invention has been made to solve the above problems, and an object of the present invention is to provide a print head that realizes a cooling function that enables high-frequency continuous printing, which is achieved by the related art, at a smaller size and at a lower cost. Is to provide a printer equipped with.

[0004]

In order to solve the above problems, a printer according to the present invention is characterized in that a printer is controlled by electric signals and prints by reciprocating movement in a print line direction. A wing having a rotating shaft fixed to the back of the print head and a gear member that is engaged with the rotating shaft in a rotatable state on the rotating shaft and shares the same center of rotation, and further has a blowing function. A plurality of fan members and a rack member that meshes with the gear member and has teeth arranged in the reciprocating direction of the print head. Alternatively, the print head is characterized in that printing is performed by reciprocating movement in the print line direction controlled by an electric signal, a rotary shaft fixed behind the print head, and a rotatable state on the rotary shaft. A fan member having a plurality of blades having a function of blowing air, which is engaged with the rotating shaft, a speed increasing mechanism having a function of increasing the speed of the fan member by rotation of a gear member, and meshing with the gear member. A rack member having teeth arranged in the reciprocating direction of the print head.

[0005]

In the printer having the above structure, the gear member meshes with the teeth of the rack member to rotate as the print head reciprocates. The gear member rotates the fan member to generate a reciprocating air flow around the print head. As a result, the print head is cooled rapidly.

[0006]

【Example】

(Embodiment 1) One embodiment of the present invention will be described with reference to FIGS. 1 is a side sectional view of a print head of a printer showing an embodiment of the present invention, and FIG. 2 is a perspective view of a carriage driving section of a printer showing an embodiment of the present invention.

The structure of the present invention will be described below with reference to FIGS. 1 and 2.

In FIG. 1, 10 is a print head, 11 is a yoke arranged inside the print head 10, and 12 is a yoke 1.
A coil incorporated in the inside of 1 is a radiator which is adjacent to the yoke 11 and radiates heat generated from the coil 12 during printing operation to the outside air through the yoke 11, and 14 is a component inside the print head 10. A back cover that serves to hold it, 20 is a rotating shaft fixed to the back cover 14, 31 is an E ring 2 attached to the rotating shaft 20 in a rotatable state about the rotating shaft 20.
The fan is an integral structure with the fan drive gear 32 that has four blades that are engaged with each other and have a blowing function and that have the same center of rotation. Further, in FIG. 2, reference numeral 41 denotes a rack which is raised from the frame 40 and has a rack at its end, and the fan drive gear 32 and the rack 41 are meshed with each other. Reference numeral 50 is a carriage on which the print head 10 is mounted, and 70 is a guide shaft that serves as a guide in the moving direction of the carriage 50.

Next, the operation of the present invention will be described with reference to FIG. When the carriage 50 moves in the direction of arrow A1 for printing, the fan drive gear 32 meshing with the rack 41 rotates in the direction of arrow C1 with the rotating shaft 20 as the center of rotation. Since the fan drive gear 32 has an integral structure with the fan 31, the fan 31 rotates in the direction of arrow B1. The rotation of the fan 31 causes a flow of air in the vicinity of the outer circumference of the print head 10 in the direction of the arrow D1, and the heat generated from the inside of the print head 10 is rapidly radiated through the radiator 13. Similarly, when the carriage 50 moves in the direction of arrow A2 for printing, the fan drive gear 32 meshed with the rack 41.
Rotates about the rotary shaft 20 in the direction of arrow C2,
The 31 fan rotates in the direction of arrow B2. The rotation of the 31 fan causes an arrow D2 to be drawn in the air near the outer circumference of the print head 10.
A directional flow is generated, and the heat generated from the inside of the print head 10 is rapidly radiated through the radiator 13.

Although omitted in the present embodiment for the sake of simplifying the description, a structure in which the safety of the operator is taken into consideration by providing a breathable cover around the fan 31.

(Embodiment 2) Another embodiment of the present invention will be described with reference to FIG. FIG. 3 is a perspective view of a carriage driving unit of a printer showing an embodiment of the present invention. 10 is a print head having the rotary shaft 20, the fan 31, and the fan drive gear 32 described in FIG. 1 of the first embodiment, and 42 is the frame 4.
A rack that is started from 0 and has a rack at its end,
33 is a speed-increasing gear whose large gear portion meshes with the fan drive gear 32 and whose small gear portion meshes with the rack 42 and which is axially supported by the carriage 51, and 70 and 71 function as guides in the moving direction of the carriage 51. It is a guide axis to be formed.

Next, the operation of the present invention will be described with reference to FIG. When the carriage 51 moves in the direction of arrow E1 for printing, the speed increasing gear 3 meshed with the rack 42.
3 rotates in the arrow G1 direction, and the fan drive gear 32 meshing with the speed increasing gear 33 rotates in the arrow F1 direction with the rotation shaft 20 as the center of rotation. Since the fan drive gear 32 is integrated with the fan 31, the fan 31 rotates in the direction of arrow H1. The print head 1 is rotated by the rotation of the fan 31.
A flow in the direction of arrow I1 is generated in the air around the 0 outer circumference, and the heat generated from the inside of the print head 10 is rapidly radiated through the radiator 13. Similarly, when the carriage 51 moves in the direction of arrow E2 for printing, the speed increasing gear 33 meshing with the rack 42 rotates in the direction of arrow G2, and the fan drive gear 32 has the rotation shaft 20 as the center of rotation. The fan 31 rotates in the arrow F2 direction, and the fan 31 rotates in the arrow H2 direction. Due to the rotation of the fan 31, a flow in the direction of arrow I2 is generated in the air near the outer periphery of the print head 10, and the heat generated from the inside of the print head 10 is rapidly radiated through the radiator 13.

Although omitted in the present embodiment for the sake of simplifying the description, a structure in which the operator 31 is taken into consideration by providing a breathable cover around the fan 31.

[0014]

In the printer using the above structure, the weight of the print head can be significantly reduced as compared with the prior art without lowering the printing frequency, and the drive source of the carriages 50, 51 is not taken by the electromagnetic motor. Since it is obtained from the operation, the manufacturing cost can be kept extremely low. Further, the current consumption of the entire printer can be suppressed to be extremely low as compared with the prior art. As described above, the effect of the present invention is very large.

[Brief description of drawings]

FIG. 1 is a side sectional view of a print head showing a structure of a printer which is an embodiment of the present invention.

FIG. 2 is a perspective view of a carriage driving unit showing a structure of a printer which is an embodiment of the present invention.

FIG. 3 is a perspective view of a carriage driving unit showing a structure of a printer which is an embodiment of the present invention.

[Explanation of symbols]

 10 print head 20 rotating shaft 31 fan 32 fan drive gear 41 rack 50 carriage

Claims (2)

[Claims] 1. A print head which is controlled by an electric signal and prints by reciprocating movement in a print line direction, a rotary shaft installed behind the print head, and the rotary shaft in a rotatable state on the rotary shaft. A fan member having a plurality of blades of a shape having an air blowing function and having a gear member that is engaged with and shares the same center of rotation; and a tooth in the reciprocating direction of the print head that meshes with the gear member. A printer comprising a rack member arranged. 2. A print head which is controlled by an electric signal and prints by reciprocating movement in the print line direction, a rotary shaft installed behind the print head, and the rotary shaft which is rotatable on the rotary shaft. A fan member having a plurality of blades of a shape which is engaged with the fan and has a blowing function, a speed increasing mechanism having a function of increasing the speed of the fan member by the rotation of the gear member, and the print engaging with the gear member. A printer comprising: a rack member having teeth arranged in a reciprocating direction of a head.