JP2013049176A - Printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent motor performance from being adversely affected even when splashes infiltrate into a housing from a discharge port.SOLUTION: This printer includes: a platen roller 111; a thermal line head 112; a motor for driving the platen roller 111; and a motor cover 31 for covering the motor. The motor includes a motor casing 21 and a motor shaft MA. The motor casing 21 includes a first region P located on a lower side from the discharge port 107, a second region Q located on an opposite side from the first region P and a third region R to a cylinder end portion having a substantially cylindrical shape. The motor cover 31 includes a receiving section 34 for receiving splashes when the splashes flow in along a vertical direction from the discharge port 107, an opening section 36 for radiating heating in the motor and a support wall section 32 with a through hole 33 into which the motor shaft MA is penetrated.

Description

  The present invention relates to a printing apparatus that performs desired printing on a printing medium.

  A printing apparatus that performs desired printing on a printing medium is known (for example, see Patent Document 1). This printing apparatus is driven by a motor, and includes a conveyance roller (platen roller) that conveys a medium to be printed (printing paper), and a print head (thermal) that performs desired printing on the medium to be printed conveyed by the conveyance roller. A line head) and a housing (housing) that encloses the conveying roller and the print head and constitutes the outer shell of the apparatus. When the print medium is transported by the transport roller, a desired print is performed on the transported print medium by the print head, and the print medium after printing is discharged to the outside from a discharge port provided in the housing. Is done.

JP 7-309041 A

  By the way, the printing apparatus having the above-described configuration may be used in an environment that may be exposed to rainwater or other water, such as an outdoor environment or a water environment in a building. In such a case, splashes from the outside may enter the inside of the housing through the discharge port, and may adversely affect the motor that drives the transport roller.

  An object of the present invention is to provide a printing apparatus that can prevent the motor performance from being adversely affected even when splashes enter the housing from the discharge port.

  In order to achieve the above-described object, the present invention provides a housing that constitutes the outer shell of the apparatus, a storage portion that is located inside the housing and stores the print target medium so as to be continuously supplied thereto, A conveying roller that is located inside and conveys the printing medium supplied from the storage unit, and performs a desired printing on the printing medium that is located inside the casing and is conveyed by the conveying roller. A print head and a discharge port that is provided to open toward one side in a predetermined first direction of the casing and discharges the print medium on which printing has been performed by the print head to the outside of the casing And a motor that is provided on the other side along the first direction from the discharge port inside the housing, and that drives the transport roller, and a motor cover made of a waterproof material that covers the motor. , The motor in the first direction A substantially cylindrical motor casing having an intersecting second direction as an axial direction, and a motor shaft provided to project from the motor casing to one side along the second direction. A first region located on the other side along the first direction from the discharge port and facing the discharge port along the substantially cylindrical circumferential direction; and the first region along the first direction. A second region along the circumferential direction of the substantially cylindrical shape, which is located on the opposite side of the motor shaft, and a tube end portion of the substantially cylindrical shape located on the one side along the second direction. The motor cover is provided so as to cover a radially outer peripheral side of the first region of the motor casing, and splashes from the discharge port along the first direction. In the event of inflow, catch the splash A receiving portion, and an opening for dissipating heat generated in the motor, which is provided on the radially outer peripheral side of the second region of the motor casing so as to face the second region to the outside of the cover; A support wall provided with a through hole penetrating the motor shaft and provided to cover the third region on the one side along the second direction from the third region of the motor casing. It is characterized by providing.

  In the present invention, a housing, a transport roller, a print head, and a motor are provided inside the housing. The medium to be printed supplied from the storage unit is conveyed by a conveyance roller driven by a motor. Desired printing is performed on the conveyed print medium by the print head, and the print medium after printing is discharged to the outside from the discharge port of the housing.

  At this time, in the present invention, the motor is provided on the other side of the discharge port opened on one side in the predetermined first direction. For this reason, when using the printing device of the present invention in an environment where there is a possibility of being exposed to rainwater or other water, such as an outdoor environment or a water environment in a building, splashes may enter the housing from the discharge port. There is a risk of adversely affecting the motor.

  Therefore, in the present invention, a waterproof motor cover that covers the motor is provided. The motor cover includes a receiving part and an opening. A receiving part is provided so that the radial direction outer peripheral side of the 1st area | region located in the other side along the 1st direction from the discharge port nearest the said inflowing splash may be provided among the motor casings. And this receiving part receives the splash which flows in along a 1st direction from a discharge port as mentioned above. Thereby, it can block that the said splash reaches | attains a motor and it can prevent the bad influence on motor performance from arising.

  On the other hand, the motor cover includes an opening in addition to the receiving portion. This opening part is provided in the radial direction outer peripheral side of the 2nd area | region located on the opposite side of a 1st area | region along a 1st direction among motor casings. Thereby, the heat generated inside the motor can be radiated by the circulation of the air inside and outside the cover through the opening.

  As described above, in the printing apparatus of the present invention, it is possible to prevent the adverse effect on the motor performance by blocking the splashes entering from the outside while ensuring the cooling of the motor.

  According to the present invention, it is possible to prevent the motor performance from being adversely affected even when splashes enter the housing from the discharge port.

1 is a perspective view illustrating an external configuration of a printer according to an embodiment of the present invention. It is the perspective view which looked at the state which removed the top cover of the printer from the front side diagonally upward direction. It is the perspective view which looked at the state which removed the top cover of the printer from the back side slanting upper direction. It is sectional drawing by the FF cross section in FIG. 1, and sectional drawing by the GG cross section. It is a perspective view of the main chassis member to which the motor casing of the motor is attached via the motor cover. It is a disassembled perspective view showing a main chassis member, a motor cover, and a motor casing. It is the front view of the main chassis member to which the motor casing of the motor is attached via the motor cover, the sectional view by an AA section, and the sectional view by a BB section. It is a top view, a left side view, a bottom view, a rear view, and a front view of the motor cover. It is explanatory drawing respectively equivalent to FIG.7 (b) and FIG.7 (c) for demonstrating the behavior when a droplet flows in from a discharge port. It is sectional drawing showing the modification which provided the water absorbing member in the receiving part.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

<Schematic configuration of printer>
The overall configuration of a printer (printing apparatus) 1 according to an embodiment of the present invention will be described with reference to FIGS. In the following description, the lower right direction in FIG. 1 is defined as right, the upper left direction is left, the upper right direction is rearward, the lower left direction is front, the upper direction is upper, and the lower direction is lower (in each figure). (See arrow illustration). In addition, the up-down direction in such a definition corresponds to the first direction described in each claim, and the left-right direction corresponds to the second direction described in each claim.

  The printer 1 prints print data received from an external device (not shown) such as a PC terminal or a mobile phone on a roll paper S (print medium). The printer 1 can be driven using a battery (not shown) as a power source.

  The printer 1 includes a substantially box-shaped casing 100 that is made of, for example, a resin material and that forms an outer shell of the apparatus. The housing 100 includes a top cover 101 that constitutes the upper part of the apparatus outer shell and an under cover 102 that constitutes the lower part of the apparatus outer shell. The top cover 101 includes a front cover portion 101A and a rear cover portion 101B.

  An end portion of the under cover 102 is provided with an insertion portion 102a through which, for example, a strap or the like can be inserted. As a result, the operator can easily carry and use the battery-powered printer 1 in various places (including outdoors) as described above.

  A roll storage portion 161 (storage portion) is provided below the rear cover portion 101B of the top cover 101 (inside the housing 100) (see FIGS. 2 and 3). The roll storage unit 161 stores the roll paper S that is pivotally supported at both ends by the support member 162 so that the roll paper S can be continuously supplied from the roll storage unit 161. It has become. At this time, the rear cover portion 101B is rotatably connected to the rear end portion of the under cover 102 via the hinge portion H, thereby opening the roll storage portion 161 to the outside, and the roll storage portion 161. Can be switched to a closed state in which it is housed. By opening the rear cover portion 101B, the roll storage portion 161 is exposed to the outside of the apparatus, and the roll paper S can be easily attached or replaced.

  A discharge port for discharging the roll paper S after printing (details will be described later) to a substantially central portion in the front-rear direction of the top cover 101 (in this example, the portion where the front cover portion 101A and the rear cover portion 101B are attached). 107 is provided. At this time, the discharge port 107 is provided so as to open toward one side along the vertical direction (in this example, upward).

  A platen roller 111 (conveyance roller) is rotatably supported at the front end portion of the rear cover portion 101B. When the rear cover portion 101B is in the closed state, the platen roller 111 conveys the roll paper S by the rotation of a rotor (not shown) in the motor casing 21 being transmitted (details will be described later). .

  On the other hand, a main chassis member 150 is provided near the center in the front-rear direction inside the housing 100. A head unit HU is disposed on the main chassis member 150 so as to be swingable in the front-rear direction. The head unit HU is provided with an integrated thermal line head 112 (printing head) and a heat sink 114 for cooling the heat generated by the thermal line head 112. The heat sink 114 is urged toward the platen roller 111 (that is, the rear side) by a plurality of (two in this example) coil springs 115 whose front side ends are supported by the main chassis member 150. Thus, when the rear cover portion 101B is in the closed state, the thermal line head 112 contacts the platen roller 111 with a predetermined pressure contact force.

<Overview of printer operation>
In the above configuration, at the time of printing, print data is transmitted from an external device such as a PC terminal or a mobile phone to the printer 1 via wireless communication (or wired communication or infrared communication). Further, the roll paper S is fed out from the roll storage portion 161 by the rotation of the platen roller 111 based on the driving force of the motor. The fed roll paper S is guided to a pressure contact portion between the platen roller 111 and the thermal line head 112 by a guide member 120 provided below the discharge port 107. The thermal line head 112 performs printing in a desired mode on the roll paper S inserted between the thermal line head 112 and the platen roller 111 based on the print data. The printed roll paper S is discharged from the discharge port 107 to the outside of the housing 100. At this time, fixed teeth 160 are attached to the main chassis member 150 along the discharge port 107 inside the discharge port 107. The operator can manually cut the end portion of the roll paper S that has been printed as described above and discharged from the discharge port 107 using the fixed teeth 160.

  When a paper jam or the like occurs, the platen roller 111 is released from the thermal line head 112 and the roll paper S can be easily pulled out by opening the rear cover portion 101B of the top cover 101. Become.

<Features of this embodiment>
In the above basic configuration, the feature of this embodiment is the structure of the motor casing 21 and the motor cover 31 (details will be described later) provided so as to cover the motor casing 21. The details will be described below in order with reference to FIGS.

  As shown in FIGS. 5 and 6, on the left side of the main chassis member 150, a substantially cylindrical motor casing 21 serving as an outer shell of the above-described motor that generates a driving force for rotationally driving the platen roller 111, and a plurality of gears And a gear mechanism 132 that transmits the driving force of the motor to the platen roller 111 by being operatively connected to the platen roller 111 in the closed state of the rear cover portion 101B.

  The motor casing 21 is provided below the discharge port 107 (corresponding to the other side in the first direction described in each claim) inside the housing 100 (see FIG. 4B described above). For this reason, when the printer 1 is used in an environment where there is a possibility of being exposed to rainwater or other water, such as an outdoor environment or a water environment in a building, for example, splashes enter the inside of the housing 100 from the discharge port 107. However, the motor may be adversely affected. Therefore, in the present embodiment, a motor cover 31 that covers the motor casing 21 that is an outer shell of the motor is provided.

<Motor cover and surrounding structure>
As shown in FIGS. 6 and 7, an opening 151 and a screw hole 30 are formed in the bracket portion 152 on the lower left side of the main chassis member 150. Then, the motor cover 31 covering the radially outer peripheral side of the motor casing 21 and the substantially cylindrical motor casing 21 are in a state in which the screw holes 28 and 29 are aligned with the screw holes 30 (this At this time, a through hole 33 of the motor cover 31 described later matches the opening 151) and is fastened and fixed by a screw (not shown).

  The motor casing 21 has a horizontal direction (specifically, a left-right direction) orthogonal to the vertical direction of the casing 100 as an axial direction, and the motor shaft MA of the motor projects from the motor casing 21 to the left side along the horizontal direction, for example. Is provided. At this time, the motor casing 21 is provided on the lower side along the vertical direction from the discharge port 107 and is opposed to the discharge port 107, and the first region P along the substantially cylindrical circumferential direction and the vertical direction. A second region Q along the circumferential direction of the substantially cylindrical shape located on the opposite side from the first region P along the motor axis MA along the left side along the horizontal direction and the cylindrical end of the cylindrical shape And a third region R to be a part. In addition, the second region Q of the motor casing 21 is a wiring introduction portion formed as a notch region positioned in the immediate vicinity of the substrate 26 for introducing a motor wiring motor harness (not shown) connected to the motor. 25.

  The motor cover 31 is made of an appropriate waterproof material and is provided so as to cover the radially outer peripheral side of the first region P of the motor casing 21. That is, the motor cover 31 receives the splashed droplet when the droplet flows in the downward direction from the discharge port 107 (arrow L direction in FIGS. 9A and 9B). 9A and 9B, the receiving portion 34 for escaping in the direction of arrow M, and the second region Q facing the outside of the cover on the radially outer peripheral side of the second region Q of the motor casing 21. And an opening 36 for radiating heat generated in the motor (a missing portion without the receiving portion 34), and the third region R on the left side in the horizontal direction from the third region R of the motor casing 21. And a support wall portion 32 provided with a through hole 33 in the center of a cylindrical projection for allowing the motor shaft MA to pass therethrough.

  The receiving portion 34 has a substantially eaves shape in which the rear side is curved downward and the other front side portion extends substantially horizontally. Furthermore, a blocking wall portion 35 is provided on the rear end side of the receiving portion 34 so as to protrude obliquely upward to prevent the splash received by the receiving portion 34 from flowing forward. The blocking wall 35 is erected on the front side of the receiving portion 34 that is the same side as the wiring introduction portion 25, and prevents the splash received by the receiving portion 34 from flowing to the front side.

  9A and 9B, the head harness 27 to the head unit HU is disposed on the radially outer peripheral side of the receiving portion 34 so as to get over the blocking wall portion 35. There is a case. In such a case, even if the droplets flow along the head harness 27 after flowing in the direction of the arrow L and being received by the receiving portion 34, the droplets are shaken by the climbing structure by the blocking wall portion 35. It can be dropped and stored in the near side area N of the blocking wall 35.

  As described above, in the printer 1 of the present embodiment, the motor cover 31 includes the receiving portion 34 and the opening 36. The receiving part 34 is provided so as to cover the radially outer peripheral side of the first region P located on the lower side along the vertical direction from the discharge port 107, which is closest to the inflowing splash in the motor casing 21. . And this receiving part 34 receives the splash which flows along the up-down direction from the discharge port 107 as mentioned above. Thereby, it can block that the said splash reaches | attains the structure inside the motor casing 21, and it can prevent the bad influence on motor performance from arising. On the other hand, the motor cover 31 includes an opening 36 in addition to the receiving portion 34. The opening 36 is provided on the radially outer peripheral side of the second region Q located on the opposite side of the first region P along the vertical direction of the motor casing 21. Thereby, the heat generated inside the motor can be radiated by the circulation of the air inside and outside the cover through the opening 36. As a result, in the printer 1 of the present embodiment, it is possible to prevent the adverse effect on the motor performance by blocking the splashes entering from the outside while ensuring the cooling of the motor.

  In the present embodiment, in particular, the receiving portion 34 includes the blocking wall portion 35, so that the splash received by the receiving portion 34 is prevented from flowing to the motor harness side and flowing from the wiring introduction portion 25 to the inside of the motor. Thus, adverse effects on the motor performance can be prevented.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and technical idea of the present invention. That is, for example, as shown in FIG. 10, the upper surface of the receiving portion 34 of the motor cover 31 (specifically, the back surface portion of the receiving portion 34 facing the radially outer peripheral side of the first region P of the motor casing 21). In addition, a sheet-like water-absorbing member SH having an appropriate thickness that can absorb and hold the received droplets may be provided. This water-absorbing member Sh is formed of, for example, a polyethylene foam whose surface is perforated, a non-water-absorbing layer that is the lowermost layer, a water-absorbing layer that is formed by continuous foaming that is an intermediate layer, and a perforated process that is the uppermost layer It is formed by the three-layer structure by each skin layer which gave. Thereby, the splash received in the receiving part 34 can be absorbed and can be stably hold | maintained. Moreover, the splash of the state hold | maintained by the water absorption member SH can also be evaporated as it is using the heat_generation | fever of a motor.

  In addition to those already described above, the methods according to the above-described embodiments and modifications may be used in appropriate combination.

  In addition, although not illustrated one by one, the present invention is implemented with various modifications within a range not departing from the gist thereof.

1 Printer (printing device)
DESCRIPTION OF SYMBOLS 21 Motor casing 25 Wiring introduction part 26 Harness 27 Head harness 31 Motor cover 32 Support wall part 34 Receiving part 35 Blocking wall part 36 Opening part 100 Case 101 Top cover 102 Under cover 107 Outlet 111 Platen roller (conveyance roller)
112 Thermal line head (printing head)
161 Roll storage unit (storage unit)
S Roll paper (medium for printing)
MA motor shaft P 1st area Q 2nd area R 3rd area

Claims (3)

A housing constituting the outer shell of the device;
A storage unit that is located inside the housing and stores the print medium so as to be continuously supplied;
A transport roller that is located inside the housing and transports the printing medium supplied from the storage unit;
A print head that is located inside the housing and that performs desired printing on the print-receiving medium conveyed by the conveyance roller;
An outlet that is provided to open toward one side in a predetermined first direction of the casing, and that discharges the medium to be printed on which printing has been performed by the print head, to the outside of the casing;
Inside the housing, provided on the other side (lower side) along the first direction from the discharge port, a motor for driving the transport roller,
A motor cover made of a waterproof material covering the motor;
Have
The motor is
A substantially cylindrical motor casing having an axial direction in a second direction orthogonal to the first direction;
A motor shaft provided to project from the motor casing to one side along the second direction;
With
The motor casing is
A first region located on the other side along the first direction from the discharge port and facing the discharge port along the substantially cylindrical circumferential direction;
A second region along the circumferential direction of the substantially cylindrical shape, located on the opposite side of the motor shaft from the first region along the first direction;
A third region located on the one side along the second direction and serving as the substantially cylindrical tube end;
With
The motor cover is
A receiving portion that is provided so as to cover a radially outer peripheral side of the first region of the motor casing, and receives splashes when splashed from the discharge port along the first direction;
An opening for dissipating heat generated inside the motor, which is provided on the radially outer peripheral side of the second region of the motor casing so as to face the second region to the outside of the cover;
A support wall provided with a through hole penetrating the motor shaft and provided to cover the third region on the one side along the second direction from the third region of the motor casing;
A printing apparatus comprising: The printing apparatus according to claim 1.
The second region of the motor casing is
A wiring introduction part for introducing motor wiring connected to the motor;
The motor cover is
Characterized in that it comprises a blocking wall portion standing on one side of the receiving portion that is the same side as the wiring introduction portion and preventing the splash received by the receiving portion from flowing to the one side. Printing device to do. The printing apparatus according to claim 1 or 2,
Of the receiving portion of the motor cover, on the one side surface along the first direction of the region facing the first region of the motor casing,
A printing apparatus comprising a water absorbing member capable of absorbing and holding the received splash.

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