KR100570503B1 - Electronic clutch for paper transport of office equipment - Google Patents

Abstract

The present invention relates to an electronic clutch for conveying paper of an office equipment, comprising: a gear housing having a magnetic material therein so as to be rotated by receiving power from an external power source and to allow attachment of a metallic plate; A rotor facing one side of the plate; A bobbin housing provided on the other side of the rotor to generate an electromagnetic force stronger than the magnetic material so as to integrally attach the rotor and the plate; And a shaft rotatably fitted to a central portion of the gear housing, the rotor, and the bobbin housing, and having an outer circumferential surface fixed to the rotor so that the rotor and the plate are integrally attached to each other by the electromagnetic force generation of the bobbin housing. And, when the electromagnetic force of the bobbin housing is lost, the plate is spaced apart from the rotor by the magnetic material and the operation of the shaft is stopped.

Electronic Clutch, Gear Housing, Rotor, Bobbin Housing, Shaft

Description

Electronic clutch for transferring paper in office automation apparatus

1 is a perspective view showing the mounting position of the electronic clutch for paper transfer of the office equipment according to the prior art,

Figure 2 is an exploded perspective view showing the electronic clutch for paper transfer of the office equipment according to the prior art,

3 is an exploded perspective view showing another embodiment of the gear housing in the electronic clutch for paper transport of the office equipment according to the prior art,

4 is a perspective view showing an electronic clutch for paper transport of an office device according to the present invention;

5 is an exploded perspective view showing an electronic clutch for paper transport of an office device according to the present invention;

Figure 6 is an exploded perspective view showing the gear housing in the electronic clutch for paper transfer of the office equipment according to the present invention,

7 is a cross-sectional view taken along the line VII-VII of FIG. 4 showing the attachment state of the plate and the rotor of the gear housing when a current is provided to the bobbin housing in the electronic clutch for paper transport of the office equipment according to the present invention.

8 is a cross-sectional view taken along the line VII-VII of FIG. 4 showing a separation state between the plate and the rotor of the gear housing when no current is provided to the bobbin housing in the electronic clutch for paper transport of an office equipment according to the present invention. .

Explanation of symbols on the main parts of the drawing

One; Electronic clutch 10a; Outer shaft

10b; Inner shaft 11; Snapping

12; Step 14; Elastic protrusions

15; Locking step 16; Engaging protrusion

17; Holes 18 in the outer shaft; Hole in inner shaft

20; Rotor 21; Groove

22; Hole 30 in the rotor; Bobbin housing

31; Bore 40 in bobbin housing; Gear housing

41; Main body 42; plate

43; Magnetic material 45; saw tooth

46; Hole 47 in the gear housing; Jamming

48; Medial projection 50; Home

51; Fixing plate 52; Snapping

53; Guide protrusion 54; Support

70; Magnetic wire

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an office equipment for feeding and developing paper, and more particularly, to an electronic clutch for paper transport, which is intermittently used to take out a plurality of sheets one by one.

In general, a developing apparatus includes a copier, an inkjet print, a laser print, a photo print, a facsimile, and the like, and these apparatuses generally perform a copy or printing process using a recording paper.

The apparatuses also include a paper feeder loaded with a plurality of sheets for the copying or printing process, and a paper feeder for sequentially fetching a plurality of sheets of paper in the paper cassette one by one. do.

As shown in Fig. 1, this paper sheet feeding device is fixed to a central shaft 101 provided with a semi-cylindrical pick-up roller 100 for drawing out from a sheet located at the top thereof so as to be rotatable in a frame of a developing apparatus. The outer circumferential surface of the pickup roller 100 is provided with a rubber 102 for increasing the frictional force when the paper is pulled out.

And the one end of the central shaft 101 with respect to the pickup roller 100 is provided with an electronic clutch 200 for paper transfer.

As shown in FIG. 2, the electromagnetic clutch 200 includes a gear housing 140, a rotor 120, a shaft 110, a bobbin housing 130, and a press-fit ring 150.

First, the gear housing 140 is rotated by receiving power from an external power source such as a motor. In FIG. 2, the gear housing 140 includes a main body 141, a leaf spring 143, and a plate 142.

First, the main body 141 is formed with one side concave and a hole 146 into which one side of the shaft 110 is fitted is formed in the center, and a plurality of teeth 145 are provided on the outer circumferential surface so as to receive power from an external power source. Is formed.

The leaf spring 143 is made of metal and is fixed to the inside of the body 141 through a plurality of screws 144.

The leaf spring 143 is such that when the rotor 120 and the gear housing 140 are attached to each other, the gear housing 140 is elastically supported by the rotor 120, and the rotor 120 and the gear housing 140 are When spaced apart from each other, the gear housing 140 assists to return in the axial direction from the rotor 120.

The plate 142 is made of metal and is fixed to the main body 141 by a fixing method such as pressing or fusion, which is seated on the upper surface of the leaf spring 143. Unexplained symbol '147' is the melting point.

The plate 142 is a surface facing one side of the rotor 120 when the rotor 120 and the gear housing 140 are attached or spaced apart from each other.

On the other hand, the rotor 120 is provided on one side of the gear housing 140 is to be attached to the plate 142 of the gear housing 140 when the bobbin housing 130 generates an electromagnetic force.

The rotor 120 is made of a metal, and a hole 122 into which the shaft 110 is fitted is formed at the center thereof, and a plurality of grooves 121 are formed around the hole 122. The grooves 111 are fitted with the protrusions 111 of the shaft 110 described below.

The shaft 110 is fitted into the hole 146 of the gear housing 140 and the hole 122 of the rotor 120, and a plurality of protrusions (inserted into the groove 121 of the rotor 120 as described above). 111).

The protrusion 111 causes the shaft 110 to rotate together with the rotor 120 when the rotor 120 rotates. The protrusion 111 has a stepped portion 112 formed stepwise at the center of the shaft 110. Are arranged at regular intervals.

The bobbin housing 130 has a hole 131 at the center for the shaft 110 to be fitted therein, and receives current from a power supply (not shown) so that the plate 142 of the gear housing 140 can be attached to the rotor 120. It is supplied and generates electromagnetic force.

Although not shown separately in the figure, the inside of the bobbin housing 130 is provided with a magnetic wire for generating a magnetic force by receiving a current.

In addition, the press-fit ring 150 is in close contact with the main body 141 of the gear housing 140 such that the gear housing 140, the rotor 120, and the bobbin housing 130 are not separated from the fitted state of the shaft 110. It is fitted to the end of the shaft (110).

The electromagnetic clutch 200 having the above-described configuration is connected to the pickup roller 100 by the central shaft 101. When the gear housing 140 rotates, the pickup roller 100 also rotates while the central shaft 101 rotates. In addition, since the paper is rotated, the paper provided in the paper feed cassette (not shown) can be supplied one by one on the paper feed path.

1 and 2, the operation of the electronic clutch 200, when the user first presses the copy switch of the copier for copying, the print command of the computer through the keyboard or mouse in the print connected to the computer In this case, when a developing signal is provided to the developing apparatus, such as a case in which the transmission signal is input to the facsimile, the gear housing 140 is rotated by receiving power from an external power source.

Here, if the gear housing 140 is separated from the rotor 120, the rotational force of the gear housing 140 may not be transmitted to the shaft 110. For this reason, the pickup roller 100 connected to the shaft 110 and the central shaft 101 may also not rotate.

In this state, as the current is supplied to the bobbin housing 130 as a power source, electromagnetic force is generated in the magnetic wire therein.

The electromagnetic force of the magnetic wire is transmitted to the rotor 120, after which the rotor 120 received the electromagnetic force attracts the plate 142 of the gear housing 140, the rotor 120 and the gear housing 140 These are attached integrally with each other.

As such, when the rotor 120 and the gear housing 140 are integrally attached, the rotational force of the gear housing 140 is transmitted to the shaft 110 via the rotor 120.

When the shaft 110 rotates by the gear housing 140, the central shaft 101 rotates by the rotating shaft 110, and the pickup roller 100 rotates by the rotation of the central shaft 101.

The rotating pickup roller 100 picks up each sheet of paper provided in the paper feed cassette by the rubber 102 provided on the outer circumferential surface and transfers the sheets to the paper feed path.

On the other hand, when the supply of current to the bobbin housing 130 is cut off, the electromagnetic force of the bobbin housing 130 is extinguished, and at the same time the gear housing 140 is the rotor 120 by the restoring force of the leaf spring 143 Return to its original position away from

When the gear housing 140 is returned to its original position, the binding force between the gear housing 140 and the shaft 110 is released, so that the power between the gear housing 140 and the shaft 110 is cut off, and for the next paper. The paper feed setting state is changed.

However, the gear housing 140 fixes the leaf spring 143 through a plurality of screws 144 in the electronic clutch for conveying paper of a conventional office equipment, and compresses or fuses the plate 142 to the main body 141. By doing so, the assembly is difficult, there is a problem in that the production cost, the labor cost and labor costs are increased, the production cost is high.

A conventional gear housing that improves these problems is shown in FIG. 3.

As shown in FIG. 3, another conventional gear housing 300 includes a body 301, a leaf spring 303, and a plate 302.

First, the main body 301 is formed with one side concave and a hole 305 into which one side of the shaft (refer to reference numeral 110 in FIG. 2) is formed at a central portion thereof, and a plurality of main bodies 301 may receive power from an external power source. A tooth 306 is formed on the outer circumferential surface.

The inside of the main body 301 includes a plurality of fusion protrusions 304 around the hole 305 and a plurality of locking protrusions 307 outside the fusion protrusions 304.

The leaf spring 303 is fitted to the plurality of fusion projections 304 as a metal material. The leaf spring 303 is fixed to the inside of the main body 301 by fusion bonding to each of the fusion projections 304 in a state of being fitted to a plurality of fusion projections (304).

Plate 302 is a metal material is seated on one surface of the leaf spring 303, and has a locking jaw (not shown) to be caught to the lower portion of the leaf spring 303, the locking projection 307 of the main body 301 It has a plurality of engaging grooves 308 on the edge to be fitted in the fixed.

However, the gear housing 300 of FIG. 3 having the above-described configuration, unlike the gear housing 140 shown in FIG. 2, does not fasten the leaf spring 303 to the main body 301 by screwing the leaf spring 303. Since fusion is performed to the fusion protrusion in the state of being fitted to the fusion protrusion 304, the assemblability is improved to some extent, but when fusion is applied to the fusion protrusion 304, the fusion temperature and the welding time applied to each fusion protrusion 304 There is a problem that the height is changed for each fixed portion of the leaf spring 303 by the height difference of the fusion projections 304 according to.

As such, the height is changed for each fixed portion of the leaf spring 303 by the height difference of each fusion protrusion 304, so that when the plate 302 is attached to the rotor due to the electromagnetic force generated in the bobbin housing, the rotor and the plate Adhesion time and operation of the 302 is unbalanced, there is a problem that the elastic force of the leaf spring 303 is changed and the appearance of the leaf spring 303 is changed when used for a long time in this state.

In addition, the material of the leaf spring 303 of the gear housing 300 is a metal material, more specifically, stainless steel (strainless steel), there is a problem that the production cost increases.

In addition, since the plate spring 303 is fused to the fusion protrusion 304 in a state in which the plate spring 303 is inserted into the fusion protrusion 304, there are still many working processes and difficult assembly.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides an electronic clutch for conveying paper of an office equipment which maintains a constant time for the gear housing to adhere and restore to the rotor and shortens the restoration time of the gear housing. Its purpose is to.

According to an aspect of the present invention for achieving the above object, a gear housing having a magnetic material therein to enable the attachment of the metallic plate to rotate and receive power from an external power source; A rotor facing one side of the plate; A bobbin housing provided on the other side of the rotor to generate an electromagnetic force stronger than the magnetic material so as to integrally attach the rotor and the plate; And a shaft rotatably fitted to a central portion of the gear housing, the rotor, and the bobbin housing, and having an outer circumferential surface fixed to the rotor so that the rotor and the plate are integrally attached to each other by the electromagnetic force generation of the bobbin housing. Includes, when the electromagnetic force of the bobbin housing is lost, the plate is separated from the rotor by the magnetic material and at the same time the operation of the shaft provides an electronic clutch for paper transport office equipment.

The magnetic body is characterized in that it is fixed by a fixed plate fitted into the central portion of the gear housing.

The fixing plate has a fitting protrusion which is forcibly fitted into the center protrusion jaw protruding from the center portion of the gear housing, and a support portion for consolidating and fixing one surface of the magnetic body to the gear housing side while the fitting protrusion is fitted to the center protrusion jaw. Characterized in having a.

The magnetic material is fixed to the inside of the gear housing with a double-sided tape or adhesive.

The magnetic body is preferably a permanent magnet.

At least two locking protrusions may be provided at an inner edge of the gear housing, and the plate may have a locking groove inserted into the locking protrusion to prevent flow in a rotational direction of the gear housing.

The shaft has an outer shaft which is fitted to the central portion of the bobbin housing and has a locking step formed at one end thereof, and at least two elastic protrusions corresponding to the locking step so that one side is fitted and fixed to the central part of the outer shaft. It characterized in that the outer shaft is made of an inner shaft which is fixed to the outer side.

The inner shaft has at least one fitting protrusion in a direction orthogonal to the rotor, and the rotor has a fitting groove corresponding to the fitting protrusion.

The inner shaft is preferably a synthetic resin material.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the electronic clutch for paper transfer of office equipment according to the present invention.

Figure 4 is a perspective view showing an electronic clutch for paper transfer of the office equipment according to the present invention, Figure 5 is an exploded perspective view showing an electronic clutch for paper transfer of the office equipment according to the present invention, Figure 6 according to the present invention 7 is an exploded perspective view showing a gear housing in an electronic clutch for paper transport of an office equipment, and FIG. 7 shows a plate and a rotor of the gear housing when a current is provided to the bobbin housing in the electronic clutch for paper transport of an office equipment. 4 is a cross-sectional view taken along the line VII-VII of the attachment state, and FIG. 8 is a plate and rotor of the gear housing when no current is provided to the bobbin housing in the electronic clutch for paper transport of an office equipment according to the present invention. 4 is a cross-sectional view taken along the line VII-VII of the separation state of FIG.

As shown in Figures 4 to 6, the configuration of the electronic clutch 1 for paper transfer of the office equipment according to the present invention is a gear housing 40, a rotor 20, a bobbin housing 30 and a shaft (10a) 10b) and the like.

First, the gear housing 40 is rotated by receiving power from an external power source and has a magnetic body 43 therein to enable the attachment of the metallic plate 42.

In an embodiment, the gear housing 40 consists of a body 41, a magnetic body 43 and a plate 42.

The main body 41 has one side formed in a concave side and a hole 46 into which the shafts 10a and 10b are fitted is formed at the center thereof, and a plurality of teeth 45 are formed on the outer circumferential surface to receive power from an external power source. do.

And the central projection jaw 48 is formed in the upper portion of the hole 46. The central projection jaw 48 is a portion to which the fitting protrusion 52 of the fixing plate 51 described below is fitted.

The magnetic body 43 is a plate-shaped permanent magnet, and is fixed to prevent the flow inside the main body 41. The magnetic body 43 enables the detachable attachment of the plate 42 in the gear housing 40.

When the magnetic body 43 is spaced apart in the state where the rotor 20 and the gear housing 40 described below are attached to each other, the plate 42 of the gear housing 40 is axially moved from the rotor 20 by magnetic force. It serves to return quickly.

The magnetic body 43 may be fixed to the main body 41 by various methods such as consolidation by the fixing plate 51 or fixing by double-sided tape or adhesive. In the present invention, consolidation by the fixing plate 51 is performed. The manner is most preferred.

In the figure, the fixing plate 51 is composed of the fitting protrusion 52, the guide protrusion 53 and the support portion 54.

First, the fitting protrusion 52 protrudes in a circular shape to the lower portion of the fixing plate 51, and the outer circumferential surface is forcibly fitted to the inner circumferential surface of the central protrusion jaw 48 formed at the upper portion of the hole 46 of the main body 41. . However, the shape of the fitting protrusion 52 may be changed depending on the shape of the central protrusion jaw 48.

The guide protrusion 53 protrudes in a circular shape on the fixing plate 51 and has a shape corresponding to that of the fitting protrusion 52. When the plate 42 moves in the axial direction, the plate 42 is moved. It serves to guide the central part of the stable.

The support portion 54 may be formed in an annular shape on the outer circumferential surface of the fixing plate 51 or in the form of other protruding granules. The upper surface of 43 is firmly consolidated and fixed to the main body 43 side of the gear housing 40.

In the present invention, the magnetic body 43 of the gear housing 40 is not a way to be fixed to the fusion projections like the plate spring shown in the prior art, the height of each fixed portion of the leaf spring by the height difference of each fusion projections There is no fear of changing, because of this, when the plate 42 is attached to the rotor 20 due to the electromagnetic force generated in the bobbin housing 30, the adhesion time and operation of the rotor 20 and the plate 42 will be imbalanced. There is no concern.

In addition, the magnetic body 43 is not expensive stainless steel (strainless) as in the conventional plate spring, it is a relatively inexpensive permanent magnet, there is an advantage of reducing the production cost.

In addition, since the magnetic body 43 does not perform fusion welding on the fusion protrusion in a state in which the leaf spring is inserted into the fusion protrusion as in the related art, the work process is reduced and the assembly is easy.

The plate 42 is made of metal, and is attached to one surface of the magnetic body 43 to be fixed to the inside of the main body 41 of the gear housing 40.

The plate 42 is a surface directly contacting or facing one side of the rotor 20 when the rotor 20 and the gear housing 40 are attached or spaced apart from each other.

In the drawing, the inner edge of the main body 41 of the gear housing 40 has at least two catching protrusions 47, and the plate 42 is fitted to the catching protrusions 47 of the main body 41 and the gear housing. The locking groove 50 is prevented from flowing in the rotational direction of the 40.

Thus, the locking groove 50 of the plate 42 is caught by the locking protrusion 47 of the main body 41, so that the plate 42 can move in the axial direction, but in the rotational direction of the gear housing 40. The main body 41 and the plate 42 can be prevented from being separated from each other.

On the other hand, the rotor 20 is provided so that one side of the plate 42 of the gear housing 40 to face.

In the embodiment, the rotor 20 is that when the bobbin housing 30 generates an electromagnetic force, the plate 42 of the gear housing 40 is attached, made of a metal material and the shaft (10a, 10b) in the center A hole 22 into which is inserted is formed.

The peripheral surface of the hole 22 has at least one fitting groove 21 in a direction orthogonal to the shafts 10a and 10b. The fitting groove 21 is to fit the fitting protrusion 11 of the inner shaft 10b described below.

The bobbin housing 30 is provided on the other side of the rotor 20 to generate an electromagnetic force stronger than the magnetic body 43 so as to integrally attach the plate 20 of the rotor 20 and the gear housing 40.

In the embodiment, the bobbin housing 30 has a hole 31 in the center for fitting the shafts 10a and 10b, and the power source for attaching the plate 42 of the gear housing 40 to the rotor 20. It receives electric current from (not shown) to generate electromagnetic force.

As described above in the prior art, the inside of the bobbin housing 30 is provided with a magnetic wire 70 that receives a current and generates a magnetic force.

The shafts 10a and 10b are pivotally fitted to the central portions of the gear housing 40, the rotor 20, and the bobbin housing 30, and the rotor 20 and the plate 42 are generated by the electromagnetic force generated by the bobbin housing 30. ) Is integrally attached, the outer circumferential surface is fixed to the rotor 20 so as to be interlocked with the gear housing 40.

In an embodiment, the shafts 10a and 10b consist of an outer shaft 10a and an inner shaft 10b.

First, the outer shaft 10a is fitted into the hole 31 formed in the center of the bobbin housing 30, and the locking step jaw 15 is formed at one end thereof.

The inner shaft 10b has at least two or more elastic protrusions 14 corresponding to the locking step 15 so that one side of the inner shaft 10b is fitted into and fixed to the hole 17 formed at the center of the outer shaft 10a. ) The other outer peripheral surface is fixed.

Here, the elastic protrusions 14 are formed integrally with the inner shaft 10b and are made of the same material. The inner shaft 10b and the elastic protrusions 14 are preferably made of a synthetic resin material to have a predetermined elastic force. Do. In this embodiment, it is most preferable that the inner shaft 10b and the elastic protrusion 14 are made of nylon 66 (NYLON 66) of the synthetic resin material.

This inner shaft 10b has a fitting protrusion 11 corresponding to the fitting groove 21 of the rotor 20, as already described. The fitting protrusion 11 has an inner shaft 10b fixed to the outer shaft 10a together with the rotor 20 when the plate 42 of the gear housing 40 is attached and rotated to the rotor 20. It is to be rotated. The fitting protrusions 11 are arranged at regular intervals on the stepped portion 12 formed stepped to the center portion of the inner shaft 10b in the drawing.

In addition, a hole 18 is formed in the center of the inner shaft 10b, and the coupling protrusion 16 is provided inside the hole 18. As shown in Figs. 7 and 8, the engaging projection 16 is to bind with a portion having a key shape at one end of the central axis (see reference numeral '101' in Fig. 1), the inner shaft 10b ) Rotates, the inner shaft (10b) and the central axis serves to prevent the other from turning.

In the present invention, the elastic projection 14 of the inner shaft 10b is bound to the engaging step 15 of the outer shaft 10a, so that the gear housing 40, the rotor 20 and the bobbin housing 30 are shafted. Departure from (10a, 10b) can be prevented stably. For this reason, it is not necessary to separately provide the press-fit ring (refer to reference numeral '150' of FIG. 2) provided at the end of the shaft as in the prior art.

The operation of the electronic clutch for paper transport of the office equipment according to the present invention is as shown in Figs.

First, when the user presses the copy switch of the copier to make a copy, when the computer sends a print command to the computer through a keyboard or a mouse in a print connected to the computer, a developing signal is sent to the developing device such as when a fax signal is input to the fax. When provided, the gear housing 40 is rotated by receiving power from an external power source.

In this state, when a current is supplied to the bobbin housing 30 through a power source, electromagnetic force is generated in the magnetic wire 70 inside the bobbin housing 30.

The electromagnetic force of the magnetic wire 70 is transmitted to the rotor 20, after which the rotor 20 received the electromagnetic force attracts the magnetic plate 43 and the plate 42 attached to the magnetic force stronger than the magnetic body 43 As shown in FIG. 7, the plate 42 moves axially toward the rotor 20 along the engaging protrusion 47 of the main body 41 and the guide protrusion 53 of the fixed plate 51. The rotor 20 and the gear housing 40 are integrally attached to each other.

When the rotor 20 and the gear housing 40 are integrally attached, the rotational force of the gear housing 40 is transmitted to the shafts 10a and 10b via the rotor 20.

Specifically, since the fitting groove 21 of the rotor 20 and the fitting protrusion 11 of the inner shaft 10b are coupled to each other, the rotational force of the gear housing 40 is transmitted to the shafts 10a and 10b. It is possible.

When the shafts 10a and 10b are rotated by the gear housing 40, the central shaft (see reference numeral 101 in Fig. 1) is rotated by the rotating shafts 10a and 10b, and the central shaft is rotated. The pickup roller (refer to reference numeral '100' in FIG. 1) rotates.

The rotating pickup roller picks up the sheets of paper provided in the paper feed cassette one by one by a rubber (see reference numeral '102' in FIG. 1) provided on the outer circumferential surface and transfers them to the paper feed path.

On the other hand, when the supply of current from the power source to the bobbin housing 30 is cut off, as shown in FIG. 8, the electromagnetic force of the bobbin housing 30 disappears, and at the same time, the magnetic body 43 of the gear housing 40 becomes a rotor. The plate 42 attached to the plate 20 by magnetic force is attracted, and the plate 42 drawn by the magnetic body 43 is guided by the locking protrusion 47 and the fixing plate 51 of the main body 41. Moving axially along the protrusion 53 toward the magnetic body 43, it is attached to the magnetic body 43 and spaced apart from the rotor 20.

In this state, the power transmitted from the gear housing 40 to the shafts 10a and 10b is cut off as the binding force is released between the gear housing 40 and the shafts 10a and 10b, and the developing apparatus feeds the paper for the next sheet. The setting will be switched.

The present invention relates to an electronic clutch for paper conveyance of office equipment, and since the magnetic body is not installed in the gear housing as in the prior art, it is possible to significantly reduce the work process because there is no need to perform a separate fusion process. And, there is an effect that can be easily assembled.

In addition, since the present invention does not need to perform a fusion process separately by installing a magnetic body, since the height is uniform for each fixed portion of the magnetic body and no deviation occurs, when the plate is attached to the rotor due to the electromagnetic force generated by the bobbin housing. There is a good effect that the time and operation of the plate attachment to the rotor can be balanced.

As described above, the present invention is a structure in which the time and operation of attaching the plate to the rotor are balanced, and thus, even when used for a long time, the present invention has an excellent advantage of being able to operate stably without deforming its appearance.

In addition, the present invention has an effect that can significantly shorten the time to restore the plate attached to the rotor by the magnetic body back to the original state.                     

In addition, since the present invention uses inexpensive magnetic material, that is, permanent magnets, without using expensive leaf springs, the present invention can significantly reduce the production cost, and the present invention combines the outer shaft and the inner shaft in a one-touch manner. Since it is easy to assemble, there is an excellent advantage that does not need to use a separate press-fit ring.

Claims (9)

A gear housing having a magnetic material therein to enable rotation of the metal plate and to receive power from an external power source; A rotor facing one side of the plate; A bobbin housing provided on the other side of the rotor to generate an electromagnetic force stronger than the magnetic material so as to integrally attach the rotor and the plate; And When the rotor and the plate are integrally attached to the center of the gear housing, the rotor and the bobbin housing, and the rotor and the plate are integrally attached due to the electromagnetic force generated by the bobbin housing, the outer circumferential surface is fixed to the rotor so as to be interlocked with the shaft. Include, When the electromagnetic force of the bobbin housing is lost, the plate is separated from the rotor by the magnetic material and at the same time the operation of the shaft stops the electronic clutch for the office equipment. The electronic clutch of claim 1, wherein the magnetic material is fixed by a fixing plate fitted into a central portion of the gear housing and consolidated. The gear housing of claim 2, wherein the fixing plate includes a fitting protrusion that is forcibly fitted into the central protrusion jaw protruding from the center portion of the gear housing, and the one surface of the magnetic body in the state where the fitting protrusion is fitted to the central protrusion jaw. An electronic clutch for paper conveyance of an office equipment, characterized by having a support portion fixed to the side. The electronic clutch of claim 1, wherein the magnetic material is fixed to the inside of the gear housing by a double-sided tape or an adhesive. The electronic clutch for paper transport of an office equipment according to any one of claims 1 to 4, wherein the magnetic material is a permanent magnet. According to claim 1, wherein the inner edge of the gear housing having at least two or more locking projections, the plate has a locking groove which is fitted to the locking projections to prevent flow in the rotational direction of the gear housing. Electronic clutch for feeding paper in the machine. According to claim 1, wherein the shaft is fitted to the central portion of the bobbin housing and the outer shaft is formed at the one end end, and at least two or more corresponding to the locking step so that one side is fitted into the central portion of the outer shaft An electronic clutch for paper transport of an office equipment, characterized in that it has an elastic protrusion and an inner shaft on which the other outer circumferential surface of the rotor is locked. 8. The electronic clutch of claim 7, wherein the inner shaft has at least one fitting protrusion in a direction orthogonal to the rotor, and the rotor has a fitting groove corresponding to the fitting protrusion. The electronic clutch of claim 7 or 8, wherein the inner shaft is made of a synthetic resin material.

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