KR19980072806A - Automatic Dust Collection Blackboard Eraser and its Charging Base - Google Patents

Abstract

The present invention relates to an automatic dust collecting blackboard eraser and a charging stand, wherein the automatic dust collecting blackboard eraser of the present invention is guided by a felt driving roller (41), a driven roller (42), and a guide roller (43) in a body (10). A felt driving roller receives power from the type felt 20, a sluice ratio 71 for continuously hitting the inner surface of the crawler-type felt 20, and an electric motor 44. 41) and a dust extraction driving unit for rotating the pinnacles 71, a dust collector driving unit for transferring and storing the chalk dust exhausted by the pinnacles 71 into the dust collecting container 30, and the electric motor 44 The charging stage 100 of the present invention comprises a mounting portion 110 to which the eraser 1 is mounted, and a plurality of connection terminals 113a to 113c provided in the mounting portion. ) And electrically connected to the connection terminals 113a to 113c It consists of a control unit 120 for selectively supplying a power according to the charge state.

Therefore, after erasing the chalk on the surface of the blackboard (粉 筆跡) is easy to collect and clean the chalk dust on the eraser automatically and easy to charge the secondary battery as a power source is convenient to use.

Description

Automatic Dust Collection Blackboard Eraser and its Charging Base

The present invention relates to an automatic dust-collecting blackboard eraser and a charging stand according to the present invention, and more particularly, to easily clean and clean the chalk powder on the eraser after erasing the chalk marks written on the surface of the blackboard. The present invention relates to an automatic dust collecting blackboard eraser and a charging stand according to which a battery can be charged for convenient use.

In general, when erasing chalk marks written on a blackboard, a sponge or cotton pad is embedded in a cloth, which is usually made of cloth. Chalk powder easily saturated the surface, leaving the chalk powder where the eraser passed on the surface of the blackboard, which made the surface very dirty. Chalk powder fell around the board or flew into the atmosphere, which hindered the educational environment.

Therefore, the present applicant to automatically collect the chalk powder generated by erasing the blackboard to solve the above problems to facilitate the removal and at the same time to prevent the chalk powder flying to improve the educational environment, the user to hold with one hand It was developed as a single piece of the size that can be freely moved to develop a very easy to use automatic blackboard eraser, published in 1996 Patent Application Publication No. 13413.

The above-mentioned automatic blackboard eraser is easy to use because the chalk powder is automatically collected, but when the crawler felt rotates, the rotational load due to frictional resistance between the crawler felt and the anti-skid plate is excessively increased by driving tension. Therefore, the power consumption is increased and at the same time the rotational speed of the trackless felt is reduced, there is a disadvantage that the performance is reduced.

In addition, even when the chalk powder on the tracked felt is exhausted, the frictional resistance with the tracked felt increases, which increases the capacity of the electric motor, making the board eraser's body larger and heavier. Furthermore, the brush, blade drum and screw Since the chalk powder removed from the caterpillar felt is removed by moving it to the dust collecting container, the flying phenomenon occurs in the process of moving the chalk powder, and the screw is rotated to transfer dust in one direction and then the screw Since the blade is provided to be pushed into the dust collecting container, the performance was degraded due to the lack of the dust collection speed and the dust transfer effect.

In addition, since the primary battery (battery) is used for supplying electricity, there is a problem in that it has to be replaced every time, and there is a problem that the cost is continuously generated.

The present invention is to solve the conventional problems as described above, the object of which is to improve the driving force of the crawler-type felt while at the same time reducing the frictional resistance to reduce the power consumption by allowing smooth rotation of the crawler-type felt. The present invention provides an automatic dust collecting blackboard eraser that can reduce the overall size and weight of the body by reducing the capacity of the electric motor.

Another object of the present invention is to effectively shake off the dust on the caterpillar felt felt dust collecting dust collecting dust to improve the dust collection performance and simplify the parts, it is convenient to clean the dust in the dust collecting dust Is to provide an automatic dust collection blackboard eraser.

Still another object of the present invention is to replace the electricity supply with a rechargeable secondary battery and to be able to charge if necessary to remove the hassle of replacing the battery, to reduce the ongoing cost burden charging stand of automatic dust collection blackboard In providing.

1 is a perspective view showing an automatic dust collecting board eraser and charging stand according to the present invention.

Figure 2 is a perspective view of a state in which the left cover of the automatic dust collecting chalkboard eraser according to the present invention.

3 is a cross-sectional view showing the internal structure of the automatic dust collecting blackboard eraser according to the present invention.

4 is a cross-sectional view taken along the line A-A of FIG.

5 is a cross-sectional view taken along the line B-B in FIG.

6 is a cross-sectional view taken along the line C-C of FIG.

FIG. 7 is a cross-sectional view taken along the line D-D of FIG. 5.

8 is a cross-sectional view taken along the line E-E of FIG.

9 is an enlarged cross-sectional view taken along the line F-F in FIG.

10 is a plan view of a charging station according to the present invention.

FIG. 11 is a cross-sectional view taken along the line G-G of FIG. 10.

12 is a cross-sectional view taken along the line H-H of FIG. 10.

13 is a right side view of the charging station according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Eraser 9, 11: Left, right cover

9a: hook protrusion 10: body

10a: hemispherical groove 12, 117: bottom plate

13, 14: left and right plates 13a, 14a: left and right plates

13b: hook holder 15: inner plate

20: caterpillar felt 21: sponge

22: slip plate 30: dust collector

31: discharge cover 32: hinge pin

33: locking projection 34: hook lever

35, 61: tension coil spring 36: see-through window

41: felt driving roller 42: driven roller

43: guide roller 44: electric motor

45: motor pulley 46: pinwheel pulley

47, 53: belt 48, 49, 50: reduction gear group

51, 52: pulley 54a: fixed plate

54b: groove 54c: fixing pin

54, 57: lever 55, 58: upper and lower tension roller

56: torsion spring 59: gear

60: rotation lever 60a: gear portion

60b: inclined portion 60c: protrusion

62, 125, 128: Button 70: Dowel Gears

71: Dolphin 72: Transmission Gear

73, 74: upper and lower dust collecting rollers 75, 76: driven gear

77: relay gear 78: push roller

79: support shaft 81: secondary battery

82a to 82c: Terminal 100: Charging Base

110: mounting portion 111: support wall

112: guide rail 113a to 113c: connection terminal

114: holder 115: ball

116, 131a: spring 118: slide plate

119: holder 120: control unit

121: circuit board 122: adapter

124: charging switch 126, 127: lamp

129: Sol 130: Switch

131: lock button

The above object is guided by a body made of a shape that is easy to grip by hand, a dust collecting casing successively formed in the rear portion of the body, and a felt driving roller, driven roller and guide rollers installed freely on the front and rear sides of the body. A trackless felt that is rotatably installed and partially exposed to the bottom of the body, and a vortex that is installed freely in a body adjacent to the dust collecting container to continuously blow the inner surface of the trackless felt to be exhausted, and the body A dust extraction driving unit for rotating the felt driving roller and the pinnacle by receiving power from the electric motor installed therein, and a dust collecting driving unit for transporting and storing the chalk powder, which is installed between the body and the dust collecting bin, into the dust collecting container. And a second rechargeable battery that is electrically connected to the electric motor to supply power. And a power supply means consisting of a plurality of charging and electric motor driving terminals electrically connected to the battery, the secondary battery and the electric motor and partially exposed to the outside. Can be.

In addition, the present invention is a support wall for supporting both side walls of the eraser, guide rails guided at both sides of the bottom of the eraser by a predetermined height, the bottom plate set the depth so that the trackless felt exposed to the bottom of the eraser does not contact And a plurality of connection terminals provided on the guide rails of the mounting unit so as to face the mounting unit, the fixing unit for fixing the eraser mounted on the mounting unit so that the eraser does not flow, and the charging and electric motor driving terminals of the eraser, It is provided on one side of the mounting part and is electrically connected to the connection terminal to expose power to an electric motor of an eraser or to selectively supply charging power to a secondary battery of an eraser, and is exposed to an upper surface thereof to expose the charge switch to the outside. It includes a control unit having a button that can be operated from Can be achieved by the charging stand of the automatic dust collection blackboard eraser.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing an automatic dust collecting blackboard eraser and a charging stand according to the present invention, Figure 2 is a separation of the left cover of the automatic dust collecting blackboard eraser according to the present invention shows the process of replacing the caterpillar-shaped felt, Figure 3 and Figure 4 is a cross-sectional view showing the internal structure of the automatic dust collecting blackboard eraser according to the present invention, the eraser 1 of the present invention is largely exposed to the body 10, the lower portion of the body 10 is written chalk on the blackboard And a dust collecting container 30 for collecting the chalk powder on the crawling felt 20, and also driving the crawling felt 20 and endless A dust extraction driving unit for shaking off the chalk powder on the track-type felt 20, a dust collection driving unit for collecting the chalk powder shaken from the endless track-type felt 20 into the dust collecting container 30, and a charge for charging the secondary battery Number To be provided in the body (10).

The body 10 is formed of a shape that is easy to grip with one hand and consists of a left and right cover 9, 11 and bottom plate 12 having a predetermined space therein, the left and right cover 9 11, the inner seat plate 13, the inner right plate 14, the inner left plate 13a, the inner right plate 14a and the inner plate 15 for installing various drive parts are formed, and the dust collecting container ( 30 is successively formed at the rear of the body 10 with the inner thick plate 15 therebetween.

In addition, the left cover (9) is detachably installed with the right cover (11), as shown in FIGS. 2 and 3, so that it is possible to replace the trackless felt 20 installed therein, the inner seat ( The hook protrusion 9a formed on the inner wall of the left cover 9 is detachably coupled to the hook holder 13b formed on one side wall of the 13, and the spring 131a is attached to the other side wall of the left cover 9. The locking button 131 is elastically installed to be held on the opposite side wall of the right cover 11 to be detachably coupled.

The crawler-type felt 20 is located between the inner seat plate 13 and the inner right plate 14, and is installed so that a portion penetrates the bottom plate 12 to be exposed to the lower portion of the body 10, FIGS. 4 and FIG. As shown in FIG. 9, a sponge 21 serving as a buffer is interposed between the bottom plate 12 and the inner surface of the crawler felt 20, and between the sponge 21 and the crawler felt 20. An anti-slip plate 22 having irregularities formed on the bottom thereof is interposed to prevent left and right sliding of the crawler-type felt 20.

The exhaust drive unit includes a felt driving roller 41 and a driven roller 42 for holding the caterpillar-type felt 20 at the front and the rear of the body 10, respectively, and a guide roller provided at the rear lower side of the body 10. It consists of a 43, the felt driving roller 41, the driven roller 42 and the guide roller 43 is installed so that both ends rotatably supported on the inner seat plate 13 and the inner right plate (14).

The felt driving roller 41 is rotated by receiving the driving force of the electric motor 44, the power transmission configuration from the electric motor 44 to the felt driving roller 41 is shown in Figures 3 and 6 The motor pulley 45 is installed on the shaft of the electric motor 44, and is positioned below the felt driving roller 41 so that both ends thereof are freely supported by the inner seat 13 and the inner right plate 14 so as to rotate freely. By installing the vortex pulley 46 at one end of the inner seat 13 side of the cuff) and connecting the motor pulley 45 and the vortex pulley 46 with the belt 47, the power of the electric motor 44 is increased by the vortex ratio ( 71) is provided, one end of the inner right plate (14) side of the pinch 71 is provided with a pinch gear 70, as shown in Figure 5 and made of a pair of small gear and large gear When the first reduction gear group 48 meshes with each other, the first reduction gear group 48 continuously engages with the second reduction gear group 49 and the third reduction gear group 50. By thus slowing the rotational speed of the electric motor (44).

In addition, the electric motor 44 by installing pulleys 51 and 52 on one end of the inner right plate 14 side of the felt driving roller 41 and the shaft of the third reduction gear group 50, respectively, and connecting them with a belt 53. The power of) is decelerated through the first to third reduction gear groups 48 to 50 to be transmitted to the felt driving roller 41, whereby the caterpillar-type felt 20 is applied to the rotational force of the felt driving roller 41. To be rotated.

And the upper tension control means for increasing the rotational force of the crawler-like felt 20 on the rotation path of the crawler-like felt 20 rotated as described above, the blackboard with the crawler-like felt 20 is stopped The lower tension control means is provided so as not to flow by contacting the endless track type felt 20 to the bottom plate 12 when clearing.

3 and 4, the upper tension adjusting means pivotally installs the lever 54 on the inner right plate 14 at a position close to the felt driving roller 41, and free end of the lever 54. The upper tension roller 55 is installed freely on the rotating shaft, and the torsion spring 56 is installed on the rotating shaft of the lever 54 so that the upper tension roller 55 always presses the endless-type felt 20 by the felt driving roller. The contact area between the 41 and the crawler felt 20 is increased to increase the driving force.

In addition, as shown in FIG. 5, a fixing plate 54a is formed at the other side of the lever 54, a groove 54b is formed at the fixing plate 54a, and a fixing pin 54c is formed at the inner right plate 14. Installed so that the upper tension roller 55 is rotated a predetermined angle in the upward direction when replacing the caterpillar-type felt (20).

3 through 5, the lower tension adjusting means elastically installs the lever 57 on the inner right plate 14 adjacent to the driven roller 42 with the compression spring 57a so as to be rotatable, and the lever 57. The lower tension roller 58 is installed freely at the free end of the rotation, and the gear shaft 59 is formed on the rotation shaft of the lever 57.

The gear 59 is engaged with and interlocked with the gear part 60a of the rotation lever 60 freely installed on the inner right plate 14, and the tension coil spring 61 is installed at one side of the rotation lever 60. The tension coil spring 61 provides elastic force to the pivoting lever 60 so that the lower tension roller 58 always acts in the direction in which the crawler felt 20 is pressed. At the stop, the lower tension roller 58 always presses and presses the tracked felt 20 so that the tracked felt 20 is pulled toward the bottom plate 12 to be in close contact.

And the lower tension control means, as shown by the phantom line of Figure 4 when the lower tension roller 58 is selectively spaced apart from the tracked felt 20 to relax the tension when driving the tracked felt 20 Tension release means for reducing the frictional resistance is provided.

As shown in FIGS. 5 and 7, the tension release means includes an inclined portion 60b and a protruding piece 60c formed on one side of the rotation lever 60, and the inclined portion 60b is formed on the right side of the body 10. It is interlocked by a button 62 installed to expose a portion of the cover 11, the protrusion piece 60c is configured to partially expose the lower portion of the body 10 through the lower portion of the right cover (11).

Therefore, when one side of the button 62 presses the inclined portion 60b of the pivoting lever 60 according to the push operation of the button 62, the pivoting lever 60 is rotated by the inclined portion of the inclined portion 60b. Since the predetermined rotation in the clockwise direction of the gear 59 in conjunction with this to rotate the lower tension roller 58 as shown in the imaginary line state of Figure 4 to be spaced apart from the caterpillar felt 20, and also the right cover ( 11, when the projection piece 60c exposed to the lower part is pressed, the rotation lever 60 also rotates a predetermined angle in the clockwise direction, so that the lower tension roller 58 is a trackless felt like the push operation of the button 62. The tension that has been spaced apart from 20) acting on the crawler felt 20 is removed.

At this time, the button 62 is for turning on and off the driving of the electric motor 44, the one end of the button 62 is operated on the on, off switch 3 of the interior electrically connected to the electric motor 44 When the button 62 is pressed, the electric motor 44 is driven to perform a dust removal function, and at the same time, the lower tension roller 58 is spaced apart from the crawler felt 20 to rotate the crawler felt 20. When the button 62 is pressed and released, the drive of the electric motor 44 is stopped and the rotation of the endless-type felt 20 is stopped, and at the same time, the elasticity of the tension coil spring 61 is tensioned. By the restoring force, the lower tension roller 58 presses the caterpillar-type felt 20 again to maintain the tension.

Meanwhile, as shown in FIGS. 3, 4 and 6, the dust collecting driving unit of the present invention installs a transmission gear 72 on the inner seat 13 side of the felt driving roller 41, and the transmission gear 72 is installed. It is driven through the power of the electric motor 44 through.

That is, an opening having a predetermined size is formed in the inner plate 15 between the body 10 and the dust collecting container 30, and the upper dust collecting roller 73 and the lower dust collecting roller 74 are installed at the opening position, and both ends thereof are provided. It is installed so as to be rotatably supported on the inner left rear plate 13a and the inner right side plate 14a, and each driven gear 75 at one end of the inner left rear plate 13a of the upper dust collecting roller 73 and the lower dust collecting roller 74, respectively ( 76) to interlock with each other.

In addition, the relay gear 77 is rotatably installed on the inner rear plate 13a between the transmission gear 72 and the driven gear 75 of the upper dust collecting roller 73, and the transmission gear 72 and the driven gear ( 75, respectively, so that the rotational power of the transmission gear 72 is transmitted to the driven gear 75 through the relay gear 77 so that the upper and lower dust collecting rollers 73 and 74 can rotate. And the lower dust collecting rollers 73 and 74 set the diameter so that there is a slight gap for the chalk powder to be transported, while the upper dust collecting roller 73 is a little for preventing the impact interference with the caterpillar-type felt 20. There is a clearance gap, and the upper of the upper dust collecting roller (73) by installing a brush (129) to sweep off the crazy chalk dust.

And by installing a push roller 78 in the lower dust collecting roller 74 to maintain a predetermined gap with the lower dust collecting roller 74, both ends of the push roller 78 is the inner left rear plate 13a and the inner rear plate 14a. ) To be rotatably supported and installed so that the circumferential surface of the push roller 78 is in close contact with the caterpillar-type felt 20 to press a predetermined amount.

At this time, as shown in Figs. 3 and 4, the claw ratio 71 installed in the lower portion of the felt driving roller 41 has a plurality of blades in the axial direction and each of the plurality of blades is arranged to have a predetermined angle phase difference in the circumferential direction. It is installed, the length is set so that the end thereof hits the inside of the endless tracked felt 20 during rotation, to hit the point between the upper dust collecting roller 73 and the push roller 78, the felt driving roller 41 A portion of the felt driving roller 41 which is interfered with the rotation of the pawl ratio 71 is inserted in order to shorten the distance between the pawl ratio 71 and the pawl ratio 71.

Therefore, since the hitting the trackless felt 20 continuously by the rotation of the pinnacle 71, the chalk powder on the surface is separated and falls between the upper dust collecting roller 73 and the push roller 78, the upper dust collecting roller 73 And the lower dust collecting roller 74 is rotated in the direction of the arrow, respectively, as shown in FIG. 4, so that the chalk powder is transferred to the dust collecting container 30 by the upper and lower dust collecting rollers 73 and 74, and is accumulated. The roller 74 rotates clockwise and the push roller 78 is rotated clockwise by the crawler felt 20 so that the chalk powder in the dust collecting container 30 does not flow back between them.

In addition, the support shaft 79 in line contact with the lower dust collecting roller 74 is installed in the dust collecting container 30 so that the chalk powder on the surface of the lower dust collecting roller 74 is removed in the process of making a linear contact with the supporting shaft 79. To be completely transferred to the dust collecting container (30).

The dust collecting container 30 in which chalk powder is collected by the dust collecting driving unit as described above, has a discharge cover 31 for discharging chalk powder in the dust collecting container 30 to the outside as shown in FIGS. 4 and 8, and Locking means for selectively opening and closing the discharge cover 31 is provided.

The discharge cover 31 is formed in the lower portion of the dust collecting container 30 so as to easily discharge the chalk powder, one end is rotatably installed by the hinge pin 32 to enable opening and closing.

In addition, the locking means forms a locking projection 33 on one side of the discharge cover 31, and the hook lever 34, which is selectively retained from the locking projection 33, is rotatably installed on the dust collecting container 30 side. The hook lever 34 can be operated from the outside, and the tension lever spring 35 is installed on the hook lever 34 so that the hook lever 34 is always caught by the catching protrusion 33 of the discharge cover 31. The elastic force acts in the holding direction.

Therefore, the discharge cover 31 is opened and closed by the operation of the hook lever 34, and a part of the rear side of the dust collecting container 30 is formed in the transparent viewing glass 36 to be collected inside the dust collecting container 30. Check the amount of chalk so you can decide when to discharge.

As described above, the dust extraction driving unit and the dust collecting driving unit are driven by the driving force of the electric motor 44, and the electric motor 44 is supplied with power from the secondary battery 81, and the charging means of the secondary battery 81 is As shown in FIG. 5, it consists of three terminals 82a-82c provided in the lower part of the inner right side plate 14 side, For example, among the three terminals 82a-82c, it is the 1st terminal 82a, for example. ) Is used as a common ground, and the second terminal 82b is used for charging to supply power to the secondary battery 81, and the third terminal 82c is to supply power to the electric motor 44. It is used for electric motor driving when driving the dust extraction driving unit and the dust collecting driving unit.

These three terminals 82a to 82c are electrically connected to the secondary battery 81 and the electric motor 44, charge the secondary battery 81 by a charging stand which will be described later, and the electric motor 44 It is used to perform dust removal function by driving).

The automatic blackboard eraser of such a configuration erases the chalk on the blackboard in a state where driving of the caterpillar-type felt 20 is stopped as shown in FIG. As described above, in the state where the driving of the crawler-type felt 20 is stopped, the lower tension roller 58 presses the crawler-type felt 20 by the elastic force of the tension coil spring 61 and comes into close contact with the bottom plate 12. In addition, due to the unevenness of the anti-skid plate 22 provided between the bottom plate 12 and the endless tracked felt 20, the flow of the endless tracked felt 20 and the left and right sliding during friction with the surface of the board. This prevents the board from being erased efficiently.

By erasing the blackboard as described above, the chalk powder buried in the tracked felt 20 can be removed by operating the dust extraction driving unit and the dust collecting driving unit by manipulating the button 62 exposed to the side of the eraser 1. That is, when the button 62 is pressed as shown in FIG. 3, one end of the on / off switch 3 turns on to drive the electric motor 44, and the rotational force of the electric motor 44 is shown in FIG. 6. As shown, it is to rotate the pinnacles 71 through the motor pulley 45 and the pinnacle pulley 46 connected to the belt 47.

Subsequently, the rotational force transmitted to the pinnacle 71 is provided with the pinnacle gear 70 installed at the other end of the pinnacle 71 and the first to third gear groups 48 continuously engaged thereto. The felt driving roller 41 is rotated by the pulleys 51 and 52 connected to the belt 53 and decelerated by the through to 50 to drive the caterpillar-type felt 20.

At this time, the caterpillar-type felt 20 is rotated from the felt driving roller 41 via the driven roller 42 and the guide roller 43, the upper tension roller 55 is always the elastic force of the torsion spring 56. Since the trackless felt 20 is being pressed, the contact area with the felt driving roller 41 is increased to increase the driving force of the trackless roller 20.

5 and 7, one end of the button 62 presses the inclined portion 60b of the rotation lever 60 by pushing the button 62 so that the rotation lever 60 is clockwise. And the gear unit 60a of the rotation lever 60 and the gear 59 of the lower tension roller 58 are engaged with each other, so that the lower tension roller 58 is in an infinite track as shown in the virtual line of FIG. 4. It is spaced apart from the mold felt 20, thereby weakening the tension of the caterpillar felt 20 is smooth rotation.

When the crawler-type felt 20 is smoothly rotated as described above, chalk dust is removed from the crawler-type felt 20 by the dust extraction driving unit and the dust collection driving unit provided between the body 10 and the dust collecting container 30. That is, as shown in FIG. 4, when the swivel ratio 71 rotates and continuously strikes the inside of the crawling crawler felt 20, the chalk powder on the surface of the crawler felt 20 It is separated and falls between the upper dust collecting roller 73 and the push roller 78, the upper, lower dust collecting roller through the transmission gear 72 and the relay gear 77 of the felt driving roller 41 as shown in FIG. Since the rotational force is transmitted to the driven gears 75 and 76 of the 73 and 74, the upper dust collecting roller 73 and the lower dust collecting roller 74 rotate in the direction of the arrow, respectively, as shown in FIG. The chalk powder separated from the felt 20 is transferred to the dust collecting container 30.

At this time, since the push roller 78 and the sole 129 are in close contact with the endless felt 20, there is no fear that the chalk powder will escape to the other side, and the sole 129 is placed on the surface of the rotating endless felt 20 that is rotated. Some of the chalk dust is wiped down, and the lower dust collecting roller 74 and the non-rotating support shaft 79 is in line contact, so the chalk dust on the surface of the lower dust collecting roller 74 is supported by the support shaft 78. Separated and stacked to the dust collector (30).

When the chalk powder is accumulated in the dust collecting container 30 as described above, the user can check the interior through the see-through window 36 formed in the dust collecting container 30 as shown in FIGS. 1 and 8. After confirming, the discharge timing can be determined.

The discharge of the chalk powder is rotated by a predetermined angle from the outside of the hook lever 34 of the dust collecting container 30, the tension coil spring 35 is tensioned while the locking projection of the discharge cover 31 held on the hook lever 34 ( 33) is to be released, so that the discharge cover 31 is opened by rotating around the hinge pin 32 as shown in the virtual line state of Figure 4 to discharge the chalk powder to the outside, the discharge cover Since 31 is located at the bottom of the dust collecting container 30, the discharge of chalk powder is very easy.

After discharging the chalk powder and closing the discharge cover 31 again, the locking projection 33 of the discharge cover 31 is held and closed by the hook lever 34 which is always rotated in the locking direction by the elastic force of the tension spring. The state is maintained.

On the other hand, Figures 10 to 13 shows a charging stand of the automatic dust collecting blackboard eraser according to the present invention, the charging stand is composed of an eraser mounting unit 110 and the control unit 120, the mounting unit 110 is both sides of the eraser (1) A guide rail 112 on which the support wall 111 supporting the wall, the bottom plates 12 at both edges of the trackless felt 20 exposed under the eraser 1 are placed, and the support wall ( The inner side of the 111 is provided with a fixing means for fixing the eraser 1 mounted on the charging stand 100, and corresponds to the terminals for charging and electric motor driving terminals 82a to 82c of the eraser 1; The upper surface of the guide rail 112 is provided with three connecting terminals 113a to 113c electrically connected to the charging and electric motor driving terminals 82a to 82c.

At this time, the fixing means is composed of a plurality of balls 115 installed on the support wall 111 of the mounting portion 110 by the holder 114, the ball 115 is always the support wall 111 by the spring 116. The ball 115 is inserted into the hemispherical groove 10a by forming a hemispherical groove 10a into which the ball 115 is inserted, on both side walls of the eraser 1 corresponding thereto. The eraser 1 is prevented from flowing in a state in which it is mounted on the mounting unit 110 of the charging stand 100.

In addition, the mounting portion 110 is provided with a bottom plate 117 to prevent the chalk powder leaking from the eraser 1 to fall to the bottom, the slide plate 118 is coupled to one side of the bottom plate 117 It is to facilitate the cleaning of the chalk powder dropped on the bottom plate 117, the end of the slide plate 118 is formed higher than the surface of the bottom plate 117 to prevent the leakage of chalk powder as well as from the mounting portion 110 Separating the slide plate 118 to clean and reassemble the accumulated chalk powder, and to install the fixing stand 119 on one side of the support wall 111 to fix the charging table 100 to a fixed object such as a blackboard. do.

Meanwhile, the three connection terminals 113a to 113c are electrically connected to the switch 130 as shown in FIG. 11, and the switch 130 is operated by the button 128 exposed to the outside. When the eraser 1 is mounted to the mounting unit 110, the lower part of the eraser 1 can be turned on by pressing the button 128 to automatically perform the dust removal function at the same time.

The three connection terminals 113a to 113c are electrically connected to the circuit board 121 of the control unit 120, and the adapter 122 is connected to the circuit board 121 as shown in FIG. 1 to supply power. The adapter 122 and the circuit board 121 can be selectively supplied to the three connection terminals 113a to 113c to automatically release the dust when the eraser 1 is mounted to the mounting unit 110. In addition, the circuit board 121 of the control unit 120 includes a charging switch 124 to operate by using the button 125 exposed to the upper surface to selectively perform the charging function.

In addition, two lighting lamps 126 and 127 of red and green are provided on the upper surface of the control unit 120 to be electrically connected to the internal circuit board 121, and the red lighting lamp 126 is connected to the adapter ( 122) is turned on and off when the power supply is connected and short-circuited, and the green lighting lamp 127 is turned on when the charging function is performed and automatically turned off when charging is completed.

1 and 13, the charging stand has the ball 115 of the support wall 111 elastically installed with the spring 116 when the eraser 1 is mounted on the mounting portion 110 of the charging stand 100. ) Is inserted into the hemispherical groove (10a) formed on both sides of the eraser (1), the eraser (1) is fixed to the mounting portion 110 without flow.

In addition, the projecting piece 60c of the pivoting lever 60 exposed downward through the right cover 11 of the eraser 1 is guided in the process of mounting the eraser 1 to the mounting portion 110 of the charging table 100. Since the upper surface of the button 128 located on the rail 112 is pressed, the switch 130 of FIG. 11 is turned on, and the three terminals 82a to 82c provided in the eraser 1 at the same time as the eraser 1 is mounted. ) Is electrically connected in close contact with the three connection terminals 113 to 113c provided on the guide rail 112 of the mounting portion 110.

On the other hand, when the protruding piece 60c of the rotation lever 60 is pressed upward, the tension coil spring 61 is tensioned so that the rotation lever 60 rotates by a predetermined angle, thereby lowering the tension roller through the gear 59. 58 is spaced apart from the crawler felt 20 to relieve tension.

When the eraser 1 is mounted on the charging table 100 in this manner, the tension of the crawler-type felt 20 is alleviated, so that the rotation of the crawler-type felt 20 is smoothed when performing the exhaustion function.

In this state, the electrical connection is automatically made by the switch 130 to perform the dust removal function, and when the button 125 exposed to the upper surface of the control unit 120 is operated, the internal charging switch 124 operates. And the charging mode is to perform the charging function, when performing the exhaust function, the power is supplied to the electric motor 44 of the eraser (1) through the electric motor drive terminal to drive the felt driving unit and the exhaust driving unit, When the charging function is performed, power is supplied to the secondary battery 81 in the eraser 1 through the charging terminal and charged.

When the eraser 1 is removed from the charging stand 100 after the exhaustion or charging function of the eraser 1 is finished, the ball 115 is retracted while the spring 116 is compressed, so that the eraser 1 can be separated. The rotating lever 60, which was rotated by a predetermined angle by pressing the protruding piece 60c on the upper surface of the guide rail 112 of the mounting portion 110, is repositioned by the elastic restoring force of the tension coil spring 61, so that the lower tension roller 58 ) Again to increase the tension of the crawler felt 20.

And in the process of exhausting the eraser 1, if the chalk powder stuck on the trackless felt 20 falls on the bottom plate 117 and the slide plate 118 of the mounting portion 110, the slide in the direction of the arrow of FIG. When the plate 118 is separated from the mounting unit 110, it is easy to clean the chalk powder on the bottom plate 117.

As described above, when the caterpillar felt 20 of the eraser 1 equipped with the dust removing function and the filling function is damaged for a long time, the caterpillar felt 20 can be replaced.

That is, pressing the lock button 131 of the eraser 1 and moving the left cover 9 backward as shown in Figures 2 and 3, while the hook protrusion (9a) and the hook holder (13b) is released Separated from the body 10, the caterpillar felt 20 is exposed.

At this time, by pressing the lever 57 of the lower tension roller 58 in the axial direction, the gear 59 is released from engagement with the gear portion 60a, and then rotated clockwise at an angle, thereby restoring the compression spring 57a. As a result, the gear 59 and the gear part 60a are again engaged with each other, and the lower tension roller 58 is spaced apart from the crawler type felt 20 to maintain a fixed state in a constant upward position.

In addition, when the lever 54 of the upper tension roller 55 is turned counterclockwise, the groove portion 54b of the fixing plate 54a shown in FIG. 5 is inserted into the fixing pin 54c, so that the upper tension roller 55 is fixed. Since the fixed position is maintained in the directional position, the damaged trackless felt 20 can be pulled out to the left and replaced by a new trackless felt 20.

After replacing the endless roller 20, the upper tension roller 55 and the lower tension roller 58 are rotated clockwise and counterclockwise, respectively, in the reverse order of the above-described manner, so as to be in close contact with the endless roller 20. And then, pressing the lock button 131 of the left cover 9 and pushing the left cover 9 forward, the hook protrusion (9a) and the hook holder (13b) is engaged with the body (10) while being held by the track The exchange of the mold felt 20 is completed.

As described above, according to the automatic dust collecting board eraser and the charging stand according to the present invention, when the exhaustion driving is reduced the tension of the caterpillar-type felt is smoothly rotated to reduce the power consumption and exhaustion function is made efficiently, When erasing, the tension of the caterpillar felt is increased to prevent the flow of caterpillar felt, so it is very convenient to use, and the movement of chalk powder to the dust collector after dust extraction is very effective, so the dust collecting performance is improved and the chalk powder is in the driving part. It does not remain or leaks to other parts, so it is always kept clean. It is very convenient to clean the chalk powder in the dust collector. The battery used for driving the eraser can be recharged and the charging operation is made easy by the charging stand. Hassle and need to exchange This cost is eliminated.

In addition, it can be used semi-permanently by replacing only the damaged caterpillar felt, and compared to the conventional eraser has a long life and low cost of the caterpillar felt has the effect of greatly reducing the maintenance cost.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, and such modifications and modifications are within the scope of the appended claims.

Claims (15)

Body 10 made of a shape that is easy to grip by hand, a dust collecting container 30 formed in succession to the rear portion of the body 10, the felt driving roller 41 is installed freely on the front, rear side in the body 10 ), A guide roller 42 and a guide roller 43 are installed to be transported, the tracked felt 20, a part of which is exposed to the lower portion of the body 10, the body close to the dust collecting container 30 Rotating freely installed in the (10) and the driving force is felt driven by receiving the power from the swivel ratio (71), the electric motor (44) installed in the body (10) to continuously blow the inner surface of the trackless felt (20) A dust extraction driving unit for rotating the roller 41 and the claw ratio 71, and is installed between the body 10 and the dust collecting container 30 to transfer the chalk dust debris by the dolbi 71 into the dust collecting container 30. Is electrically connected to the dust collecting driver and the electric motor 44 for storing the The secondary battery 81 is electrically connected to the electric motor 44 and is rechargeable, and the plurality of secondary batteries 81 and the second battery 81 and the electric motor 44 are electrically connected to and partially exposed to the outside. And a power supply means consisting of two charging and electric motor driving terminals (82a) to (82c). According to claim 1, the upper tension adjusting means for pressurizing the tracked felt 20 to increase the contact area of the felt driving roller 41 and the tracked felt 20, and the tracked felt 20 Pressing the tracked felt 20 at the stop of the increase the tension and during the rotation of the tracked felt 20 is spaced apart from the tracked felt 20 further comprises a lower tension control means for relieving tension The automatic dust collecting blackboard eraser characterized in that. 3. The upper tension adjusting means according to claim 2, wherein the upper tension adjusting means includes a lever (54) rotatably installed at a position close to the felt driving roller (41), and an upper tension roller (55) rotatably installed at an end of the lever (54). ), The upper tension roller 55 is spaced apart from the torsion spring (56) and the upper tension roller (55) which acts an elastic force in the direction to press the endless felt 20. And a groove 54b and a fixing pin 54c of the fixing plate 54a to be fixed at a predetermined height. The method of claim 2, wherein the lower tension control means, the lever 57 is installed rotatably in a position close to the driven roller 42, and the rotationally freely installed at the end of the lever 57 endless track felt ( A lower tension roller 58 for selectively pressing 20, a gear 59 fixed to the shaft of the lever 57, and a gear portion 60a meshed with the gear 59, The rotating lever 60 is installed to be rotated at a predetermined angle, and has a tilting portion 60b and a protrusion piece 60c exposed to the outside at one end thereof, and is installed to expose a part of the body 10 to the outside of the rotating lever ( A button 62 for rotating the rotation lever 60 by a predetermined angle by pressing the inclined portion 60b of the 60 and the lower tension roller 58 always press the pivot lever 20 in the direction in which the pivot lever 20 is pressed. The automatic dust collecting blackboard paper, characterized in that made of a tension coil spring (61) providing an elastic force to (60) Dog. According to claim 1, wherein the exhaust drive unit, a motor pulley (45) fixed to the shaft of the electric motor 44, a pinch pulley (46) fixed to one end of the pinch ratio 71, and the motor pulley ( 45) and a belt 47 for connecting the pulley pulley 46, the pinch gear 70 fixed to the other end of the pinch ratio 71, and the small gear meshed with the pinch gear 70 And a first reduction gear group 48 consisting of a pair of and a large gear, second and third reduction gear groups 49 and 50 for being engaged with and decelerated from the first reduction gear group 48 in turn, and the first gear. A pulley 51 fixed to the coaxial of the three reduction gear group 50, a pulley 52 fixed to the shaft of the felt driving roller 41, and a belt 53 connecting the pulleys 51 and 52 to each other. The automatic dust collecting blackboard eraser, characterized in that configured. According to claim 1, wherein the dust collector driving unit, the upper dust collecting roller 73 is installed freely rotatable between the body 10 and the dust collecting container 30, and spaced apart from a certain gap, the upper dust collecting roller 73, The lower dust collecting roller 74 is freely rotated below the dust collecting roller 30 and the lower dust collecting roller 74 is installed so as to maintain a predetermined gap with the upper dust collecting roller 73, and the lower dust collecting roller 74 is installed freely under the lower dust collecting roller ( 74) and a push roller 78 for maintaining a constant clearance and pressurizing the crawler type felt 20 and the shafts of the upper dust collecting roller 73 and the lower dust collecting roller 74 are engaged with each other. Driven gears 75 and 76, a transmission gear 72 provided on a shaft of the felt driving roller 41, and a driven gear 75 and a felt driving roller 41 of the upper dust collecting roller 73. The gears 75 are engaged with each other to transfer the rotational force of the transmission gear 72 to the driven gear 75 of the upper dust collecting roller 73. The automatic eraser dust, characterized by consisting of a relay gear 77 to pass. According to claim 6, The bulge ratio 71 is provided with a plurality of wings in the axial direction, each of the plurality of wings is formed to have a predetermined angle phase difference in the circumferential direction, the plurality of wings are dust-collected during rotation Said automatic dust collecting chalkboard eraser, characterized in that it is installed so as to continuously hit the inner surface of the tracked felt 20 passing through the point between the roller (73) and the push roller (78). The method of claim 1, wherein the sponge 21 between the exposed portion of the crawler felt 20 and the body 10, and has a concave-convex shape between the sponge 21 and the crawler felt 20 The automatic dust collecting blackboard eraser, characterized in that through the non-slip plate (22). The dust collecting container (30) of claim 1, wherein the dust collecting container (30) is rotated about the hinge pin (32) at the lower portion of the discharge cover (31) and a lock to selectively open and close the discharge cover (31). And said means being provided with said automatic dust collecting blackboard eraser. The method of claim 9, wherein the locking means, the locking projection 33 formed on the discharge cover 31, the dust collecting cylinder 30 is installed to be rotatable and a portion of the exposed projection to the outside projection 33 The automatic dust collection, characterized in that the hook lever 34 is selectively held and the tension coil spring 35 which provides an elastic force in the direction in which the hook lever 34 is held by the locking projection 33 at all times. Blackboard eraser. The method of claim 1, wherein the trackless felt 20 is a circular shape and a cloth material of a predetermined width, and after separating the left cover 9 of the eraser 1 from the body 10, the left and right directions The automatic dust collecting blackboard eraser, characterized in that configured to be withdrawn and exchanged. A support wall 111 supporting both side walls of the eraser 1, guide rails 112 guided by spaced apart at a predetermined height from the bottom of the eraser 1, and infinitely exposed to the lower part of the eraser 1. Mounting portion 110, the mounting portion 110 consisting of a bottom plate 117 set the depth so that the track-type felt 20 is not in contact with the slide plate 118 that can be disassembled and assembled to facilitate cleaning. Fixing means for fixing the eraser 1 so as not to flow, provided on the guide rail 112 of the mounting portion 110 to face the terminals for charging and electric motor drive (82a) to (82c) of the eraser (1) A switch electrically connected to one of the plurality of connection terminals 113a to 113c and the connection terminals 113a to 113c so as to supply power to the electric motor 44 for dust-driving driving when the eraser 1 is mounted ( 130, the switch (by pressing the bottom of the eraser when the eraser 1 is mounted) It is provided on one side of the button 128 and the mounting portion 110 to operate the 130, it is electrically connected to the connection terminal (113a) (113c) to supply power for the dust-driving drive and charge power It characterized in that it comprises a control unit 120 having a charge switch 124 for selectively supplying and a button 125 exposed to the upper surface to operate the charge switch 124 from the outside Charging board of dust-collected blackboard eraser. The method of claim 12, wherein the fixing means is a plurality of balls 115 provided on the support wall 111 of the mounting portion 110 by the holder 114, and the ball 115 is elastic from the support wall 111 The automatic, characterized in that the spring 116 and the hemispherical groove (10a) formed on both sides of the eraser (1) opposite to the ball 115 is formed so that the ball 115 is held Charging board of dust-collected blackboard eraser. The charging stand of the automatic dust collecting blackboard eraser according to claim 12, further comprising a fixing stand (119) installed at one side of the mounting part (110) for fixing to any fixed object. The method of claim 12, wherein the control unit 120, the lamp 126 for recognizing that the power is applied to the control unit 120, and when performing the charging function for the secondary battery 81 of the eraser (1) Charging stand of the automatic dust collecting blackboard eraser characterized in that it further comprises a lamp (127) that is turned on and off when charging is completed.