JP5217445B2 - Electric spool drum - Google Patents

Description

The present invention relates to an electric bobbin drum provided with a motor.

This type of hand-type ink brush is provided with a connecting portion that can be gripped in a drum storage portion that stores a spool drum, and a drawing guide portion that guides out the ink yarn drawn from the spool drum is provided in the connecting portion. In addition, an inking part for storing ink materials such as ink and chalk powder is provided, and the ink thread drawn out from the spool drum is passed through the threading part provided in the pulling guide part and guided out of the guide line. The ink material is configured to adhere to the ink thread by guiding contact.
Here, it is necessary to draw back the ink line drawn from the spool drum to the spool drum after drawing a black line on wood or stone. The rewinding method includes a method of manually rotating the bobbin drum, a method of rotating the bobbin drum by providing a spring as an elastic means, and a method of rotating the bobbin drum by an electric motor. A gear train is used to reduce the rotation of the motor provided with the electric motor, and there is a gear train using a spur gear, a worm gear, and a bevel gear as the reduction gear train. In addition, there is a gear using a planetary gear as a reduction gear train (see, for example, Patent Documents 1 to 4).
Japanese Utility Model Publication No. 52-2698 Japanese Utility Model Publication No. 53-121600 Japanese Utility Model Publication No. 58-117384 JP 2006-326824 A

  However, a clutch using a worm gear as the reduction gear train is required. Further, in the case of using a spur gear or a bevel gear, there is a problem that the reduction gear portion is inevitably enlarged and bulky. On the other hand, using a planetary gear as the reduction gear train has an advantage that the reduction gear portion can be made compact, but there is a problem that the number of parts increases and the assembly work becomes complicated and the cost is increased. The present invention has been made in view of such problems of the prior art, and it is a first object of the present invention to provide an electric bobbin drum that has a small number of components, is compact, can be easily assembled, and can reduce manufacturing costs. Let it be an issue.

The invention according to claim 1 is an electric bobbin drum that winds a yarn by rotating a bobbin drum by a motor, wherein the rotation of the motor is decelerated by a planetary gear mechanism and transmitted to the pincushion drum, and the planetary gear mechanism A ring gear and the drum are engaged by a concave portion and a convex portion , the ring gear is rotatably supported by a cylindrical hole formed inside the ink jet housing, and the pincushion drum is formed on the cylindrical hole and an upper portion of the ink jet housing. It is characterized in that it is rotatably supported by a circular hole formed in a cover, and the pincushion drum, the ink jet housing, and the ring gear are molded of a synthetic resin material .

  According to a second aspect of the present invention, in the electric thread winding drum according to the first aspect, the planetary gear shaft of the planetary gear mechanism is formed integrally with the motor housing.

According to a third aspect of the present invention, in the electric bobbin drum according to the first or second aspect , the switch for controlling the power supply of the motor is covered with a flexible member.

According to the first aspect of the present invention, the ring gear and the spool drum can be engaged with each other by the concave portion and the convex portion. Therefore, the engagement mechanism between the ring gear and the spool drum is simplified, and the assembling work can be performed in a very short time. be able to. In addition, it is not necessary to rotatably support the ring gear and the pincushion drum by providing a bearing, and the bearing can be dispensed with, so that the manufacturing cost can be reduced.

  According to the invention of claim 2, since the planet gear shaft is formed integrally with the motor housing, it is not necessary to separately manufacture the planet gear shaft, the number of parts can be reduced and the assembly time can be shortened. .

According to the invention of claim 3 , a highly reliable electric bobbin drum can be realized.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a central longitudinal cross-sectional view of an electric ink jet showing an embodiment of the present invention, and FIG. 2 is an exploded perspective view showing main components.

  The bobbin drum 2 around which the ink thread 1 is wound is housed in the ink fountain housing 3 in a posture in which the rotation axis is a vertical direction. The ink jet housing 3 has a horizontally divided structure, and the lower ink jet housing 4 is integrally formed with a drum storage portion 5 for storing the pincushion drum 2 and an inked portion 6. The inked portion 6 is loaded with a lower inked ink impregnated material 7 impregnated with inked ink. The upper ink candy housing 8 is divided into a drum upper cover 9 disposed in the pincushion drum 2 and a marking portion cover 11 disposed in the marking portion 6. All the members constituting the ink jet housing 3 are molded of a synthetic resin material.

One side of the inked portion cover 11 is attached to the lower inked housing 4 by a hinge configuration. That is, the inked portion cover 11 is configured to be openable and closable with respect to the lower inked housing 4. The Sumitsuki unit cover 11, stepped openings 12 at positions corresponding to the Sumitsuki portion 6 of the lower ink bottle housing 4 is provided, similar upper India ink impregnated in the inside of the stepped opening 12 and lower India ink impregnation member 7 Material 13 is loaded. Specifically, the upper ink-sink impregnation material 13 is made of a sponge and can be easily loaded by inserting it into the stepped opening 12 in a slightly compressed state. In the upper half of the stepped opening 12, a pressing member 14 that presses the upper ink impregnation material 13 is attached. The pressing member 14 is movable by a predetermined distance in the vertical direction, and is provided with a stopper 15 so as not to drop off. Therefore, when the pressing member 14 is pressed down with a finger, the upper ink-sink impregnated material 13 is pressed and the ink is oozed out in the marking portion 6 . When the finger is released from the pressing member 14, the pressing member 14 is pushed upward by the elastic force of the upper ink impregnation material 13 made of sponge and returns to the original position.

The bobbin drum 2 has a substantially bottomed cylindrical shape, and flanges 16 and 17 for restricting the position where the ink thread 1 is wound are provided at two positions on the side surface of the cylindrical part. The pincushion drum 2 is arranged upside down with respect to the lower ink fountain housing 4. That is, the bottom portion is disposed at the top. The inked thread 1 is wound around a cylindrical portion 18 between two flanges 16 and 17, and the inked thread 1 with a charcoal at one end is drawn out from the drawing guide portion 19 via the inked portion 6. . The lower surface of the lower flange 16 and the upper surface of the upper flange 17 are configured to be sandwiched between the lower ink fountain housing 4 and the drum upper cover 9, but the distance between the lower surface of the lower flange 16 and the upper surface of the upper flange 17 is The distance between the inner surface of the lower ink fountain housing 4 and the drum upper cover 9 is slightly smaller. Therefore, the pincushion drum 2 is not restrained by the lower ink jet housing 4 and the drum upper cover 9, and the pincushion drum 2 is rotatable. Cylindrical portion 21 of the lower portion flange 16 of the lower bobbin drum 2 is rotatably supported by the circular cylinder hole 22 formed within the lower ink bottle housing 4, the upper cylindrical portion 23 from the upper flange 17 of the bobbin drum 2 The drum upper cover 9 is rotatably supported by a circular hole 24 formed therein. Since all of the lower ink brush housing 4, the drum upper cover 9 and the pincushion drum 2 are molded from a synthetic resin material, the sliding resistance against relative motion is small, and the pincushion drum 2 is rotated into the ink jet housing 3 without providing a bearing. It can be supported freely.

  FIG. 3 is an exploded view showing a state in which the pincushion drum 2 is reversed after the inked portion cover 11 is opened with respect to the lower inked cage housing 4 and the drum upper cover 9 is removed. FIG. 4 is a partially exploded view showing a state in which the motor 25 and the ring gear 26 are taken out from the lower ink fountain housing 4, further disassembled from the state of FIG. 3. As shown in FIG. 3, notches 27 serving as recesses are provided at four locations on the cylindrical opening end of the bobbin drum 2.

  The motor 25 is disposed inside the cylinder of the bobbin drum 2 with the shaft end facing downward. The outer diameter dimension of the motor housing 28 is a small diameter with a margin more than the inner diameter dimension of the cylindrical portion of the bobbin drum 2. Therefore, even if the bobbin drum 2 rotates, the inner surface of the bobbin drum 2 and the outer surface of the motor housing 28 do not contact each other. On the lower end surface of the motor housing 28, that is, the end surface on the motor shaft 29 side, female screw holes 31 for fixing the motor 25 to the lower ink jet housing 4 are provided at three positions at intervals of 120 degrees. Further, planet gear shafts 33 for rotatably supporting the planet gear 32 at positions shifted in phase with respect to the female screw holes 31 are provided at three positions on the lower end surface of the motor housing 28. The planet gear shaft 33 and the motor housing 28 are integrally formed of synthetic resin.

At the bottom of the lower ink bottle housing 4 formed inside circle cylinder bore 22, is a ring gear 26 is disposed so as to be concentric with winding drum 2 and the motor shaft 29, the ring gear 26 is lower ink bottle housing 4 The cylindrical hole 22 is rotatably supported. The ring gear 26 is also molded from synthetic resin, and the ring gear 26 is rotatably supported in the cylindrical hole 22 of the lower ink fountain housing 4 without using a bearing. Protrusions 34 serving as convex portions are provided at four locations on the upper end surface of the ring gear 26. These protrusions 34 are provided at radial positions corresponding to four notches 27 provided at the cylindrical opening end of the bobbin drum 2, and in a state where the bobbin drum 2 and the ring gear 26 are stored in the ink jet housing 3. The notch 27 of the bobbin drum 2 and the projection 34 of the ring gear 26 are engaged with each other. Therefore, the rotational torque of the ring gear 26 can be transmitted to the bobbin drum 2 with a very simple structure.

  A sun gear 35 is fixed to the motor shaft 29, and planet gears 32 are rotatably supported by the three planet shafts 33. Each of the gears 26, 32, and 35 is molded from a synthetic resin, can be manufactured at a very low cost, and can be assembled in a short time. Furthermore, since each sliding member can be used without lubrication, it is possible to realize an electric ink brush that does not cause the lubricant to leak.

  A screw hole 36 is disposed in the lower ink fountain housing 4 at a portion corresponding to the position of the female screw 31 provided in the motor housing 28. That is, the screw holes 36 are provided at three locations, and the motor 25 can be fixed to the lower ink fountain housing 4 using the screws 37 from the screw holes 36.

  A battery housing portion 38 is provided on the outer bottom surface of the lower ink fountain housing 4, and both terminals of the battery 39 are electrically connected to the power supply terminal of the motor 25 via the switch 41. Further, the battery housing part 38 is sealed with a lid member 42. Therefore, it is possible to prevent rainwater and ink from entering the battery storage unit 38.

  A switch 41 for controlling the energization of the motor is disposed on the inner surface of the lower ink fountain housing 4 and at the connecting portion between the drum storage portion 5 and the marking portion 6. A packing 43 is provided around the inked part 6, and if normal, the ink does not leak from the ink impregnating material 7, 13, but the packing 43 is damaged due to careless handling. In some cases, the ink may ooze from the ink impregnating materials 7 and 13. Therefore, in the electric ink jet of the present invention, the surface of the switch 41 is covered with a rubber film 44 which is a flexible member. Therefore, even if the packing 43 is damaged and the ink is leaked from the ink impregnating materials 7 and 13, the ink does not enter the switch 41 and does not adversely affect the insulation of the control circuit components.

  A switch button 45 that presses a switch 41 for controlling energization to the motor 25 is mounted on the upper surface of the inked portion cover 11 at a position different from the pressing member 14 that presses the ink impregnating material. The switch 41 is covered with the rubber film 44. However, since the rubber film 44 can be easily deformed, the switch 41 can be operated by pressing the switch button 45 to control the energization to the motor 25. it can.

  As mentioned above, although this invention was demonstrated based on the Example, this invention is not limited to these Examples. For example, in the above embodiment, the notch 27 provided at the lower end of the bobbin drum 2 and the protrusions 34 provided at the upper end of the ring gear 26 are provided at four locations, but the number is not limited to four. Contrary to the present embodiment, the pincushion drum 2 may be provided with a convex portion, and the ring gear 26 may be provided with a concave portion to be engaged. Furthermore, although the planetary gear mechanism in this embodiment is provided with the planet gears 32 at three locations, the number of planet gears 32 is not limited to three.

It is a center longitudinal cross-sectional view of the electric ink jet which shows the Example of this invention. It is a disassembled perspective view which shows the main components of the electric ink brush which shows the Example of this invention. It is an exploded view of the electric ink jet according to the embodiment of the present invention. It is an exploded view of the electric ink jet according to the embodiment of the present invention.

1 Ink Yarn 2 Pincushion Drum 3 (4, 9) Ink Housing
22 Cylindrical hole
24 round holes
25 Motor
27 Recess (Notch)
26 Ring gear
28 Motor housing
33 planetary gear shaft
34 Convex (protrusion)
41 switch
44 Flexible member

Claims (3)

An electric pincushion drum that winds a yarn by rotating a pincushion drum by a motor, wherein the rotation of the motor is decelerated by a planetary gear mechanism and transmitted to the pincushion drum, and the ring gear of the planetary gear mechanism and the pincushion drum are Engaged by recesses and protrusions ,
The ring gear is rotatably supported by a cylindrical hole formed inside the ink jet housing,
The pincushion drum is rotatably supported by the cylindrical hole and a circular hole formed in the upper cover of the ink jet housing,
An electric bobbin drum, wherein the bobbin drum, the ink jet housing, and the ring gear are molded of a synthetic resin material . 2. An electric bobbin drum according to claim 1, wherein the planetary gear shaft of the planetary gear mechanism is formed integrally with the motor housing. The electric bobbin drum according to claim 1 or 2, wherein a switch for controlling a power source of the motor is covered with a flexible member.

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