KR101867265B1 - speed reduction device - Google Patents

Abstract

Disclosed is a speed reducing device including a hanging part. The present invention comprises: a gear housing (10) including a first speed reduction gear shaft (12) connected to an operating unit to be rotated by force from the operating unit and including a worm gear part (11) in a side, and a second speed reduction gear shaft (14) including a spur gear part (13) geared orthogonally with the worm gear part (11) of the first speed reduction gear shaft (12); a wire bobbin (20) on which a wire is wound, and including a first shaft insertion hole (21) inserted into the second speed reduction gear shaft (14) of the gear housing (10); a stopper (30) including a second shaft insertion hole (31) inserted into the second speed reduction gear shaft (14), located between the gear housing (10) and the wire bobbin (20) to be rotated at the same speed as the wire bobbin (20), and stopping the unwinding of the wire by stopping the rotation of the wire bobbin (20) when the wire is too quickly unwound from the wire bobbin (20); and a bobbin cover (40) having both sides inserted into both ends of the wire bobbin (20), and preventing the wire from being separated and tangled when the wire is being wound on or unwound from the wire bobbin (20).

Description

[0001] The present invention relates to a speed reduction device,

More particularly, the present invention relates to a decelerating device having a latching part, and more particularly, to a decelerating device having a latching part for preventing a safety accident or a falling accident by stopping a wire releasing operation when a wire of a drying- The present invention relates to a decelerating device having a locking part.

[0002] Generally, a drying rack that can dry laundry is constructed of a ceiling fixed lifting and lowering drying rack which is installed on the top surface of a ceiling and in which a plurality of hanger rods are lifted and lowered by a power means from a ceiling front surface, And a stationary drying rack to allow the user to do the same.

Among the above, in the case of the ceiling-fixed lifting / lowering drum, the motor-driven motor means drives the wires to be unwound and wound so that a plurality of hanger rods are lifted and lowered, and the user directly pulls the ball chain as the power means to rotate the wire bobbin And a hanger lifting mechanism for lifting the hanger rods.

In such a ceiling-mount type ascending / descending drum, the wire bobbin wound with the wire is pulled up by an electric motor, which is usually a power means, or by a user pulling the ball chain, so that the hanger rod is lifted and lowered when the wire is wound on the wire bobbin. The hanger rod is being lowered when it rises.

Therefore, after the user hangs the laundry on the hanger bar or removes the laundry laid on the hanger bar from the hanger bar in a state in which the hanger bar is lowered, and after removing the laundry from the hanger bar or removing the laundry from the hanger bar The lowered hanger rods are raised and lowered to enable space utilization for the lower space of the drying rack.

However, in the conventional ceiling fixed lifting / lowering rack, the wire bobbin is rotated so that the wire is released at a constant speed when the wire is unrolled so that the lowering speed of the hanger rod is kept constant and the binding force is transmitted to the loosened wire, The hanger rod is rapidly lowered beyond a predetermined speed or the binding force of the wire is released so that the hanger rod whose position is stopped is suddenly lowered suddenly.

When the hanger rod rapidly falls or suddenly falls like this, a safety accident that hits the face or the body of the user located on the lower side of the hanger rod occurs, and the hanger rod strikes the pollen or article placed on the lower side of the hanger rod There is a problem that the product is damaged or the product is damaged.

On the other hand, various technologies are being developed to solve such problems.

For example, a wire safety device for an electric laundry drying machine is disclosed in a registration room No. 20-0468161, which includes a roller body having a hollow portion formed therein at the left and right walls thereof and having a hollow portion inside thereof, A roller which is fixed to a roller shaft inserted in the guide hole and is capable of guiding the wire, and a roller which is horizontally installed on the roller body at the upper portion of the roller body, An elastic spring installed vertically to both ends of the roller shaft and the anti-deviation shaft so as to impart elasticity to the roller, a guide bracket fixedly installed on the roller in a form of wrapping the roller inside the roller body, And a ground bracket is connected to a lower portion of the guide bracket to be installed inside the roller body It consists of meat switch, and that the wire is release by a limit switch or the drive of the motor is stopped if the jam occurs.

However, since such a conventional technique can be applied only to an electric drying cabinet because it is possible only by electrical connection between a limit switch and a motor, it is difficult to apply to a semi-automatic or manual drying cabinet, It is impossible to solve the problem that the hanger rod drops quickly as the wire is rapidly released.

Korea Registration Office 20-0468161 (Registered on July 22, 2013) Korea Registration Practice 20-0444716 (registered on May 25, 2009)

An object of the present invention is to provide a deceleration device having a hook so as to prevent the hanger rod from dropping rapidly due to the stop of the wire being stopped by the stopper when the wire is rapidly unwound from the wire bobbin.

In order to achieve the above-mentioned object, the present invention provides a reduction gear transmission including a worm gear unit including a worm gear unit of a first reduction gear shaft and a second reduction gear unit of a second reduction gear, the worm gear unit being rotated by the power of the power unit, A gear housing in which a flat gear part of the shaft is accommodated; A wire bobbin having a first shaft insertion hole fitted in a second reduction gear shaft of the gear housing and wound with a wire; And a second shaft insertion hole which is fitted in the second reduction gear shaft and is located between the gear housing and the wire bobbin and rotated at the same speed as the wire bobbin, A stopper for stopping the rotation of the wire bobbin when the wire bobbin is unwound to block the unwinding of the wire; And a bobbin cover which is connected to both ends of the wire bobbin on both sides to prevent the wire from coming off and tangling when the wire is wound on the wire bobbin side or the wire is loosened from the wire bobbin, Wherein the bobbin cover is provided with a fitting portion which is fitted to the connecting protrusion by elasticity on both sides of the bobbin cover, A cover each having a semicircular shape; A first locking protrusion protruding from the upper end of the semicircular cover and a second locking protrusion protruding from the lower end of the semicircular cover; Wherein the stopper includes a second shaft engaging hole formed in the second reduction gear shaft, and a second shaft engaging hole formed in the second shaft engaging hole and protruding from the cover, A stopper body provided at the center; A guide portion provided on the stopper body; A position variable hole provided along a longitudinal direction of the guide portion; And a second boss portion which is connected to the position variable hole and is located at the guide portion and protrudes from the stopper body by centrifugal force when the wire wound on the wire bobbin is released at a speed higher than a normal speed, And a stopper for stopping the rotation of the wire bobbin connected to the reduction gear shaft to cut off the wire.

Further, the guide portion, the position variable hole provided along the longitudinal direction of the guide portion, and the stopper hole connected to the position variable hole are provided radially with respect to the stopper body.

Further, the guide portion may include a first guide portion and a second guide portion symmetrically provided on both front and rear sides of the stopper body, respectively, and the position variable hole may be formed by a first guide portion and a second guide portion, Wherein the stopper member includes: a first moving surface located at the first guide portion; A second moving surface located in the second guide portion; A hooking surface connecting the first moving surface and the second moving surface; A fitting hole penetrating through the first moving surface and the second moving surface so as to correspond to the position variable hole; And a connection pin connecting the fitting hole and the position variable hole.

Further, the second reduction gear shaft is provided with a first fixing surface formed in a plane, and the first shaft fitting hole of the wire bobbin is provided with a second fixing surface formed in a plane, and the second shaft fitting hole Wherein when the first shaft fitting hole and the second shaft fitting hole are respectively fitted to the second reduction gear shaft, the first fixing surface and the third fixing surface are provided with the second fixing surface and the third fixing surface, respectively, So that the fixing surface is closely contacted.

Further, the gear housing includes: a first housing portion having a first bolting engagement hole and having a first contact surface; And a second housing portion having a second bolting engagement hole corresponding to the first bolting engagement hole and having a second contact surface which is in close contact with the first contact surface in correspondence with the first contact surface of the first housing portion, And the first and second bolt fitting holes are formed in a manner to correspond to each other, and then the first bolting fitting hole and the second bolting fitting hole are bolted to each other.

The second fixing surface of the wire bobbin coupled to the second reduction gear shaft and closely attached to the first fixing surface of the second reduction gear shaft and the third fixing surface of the stopper may be worn A hexagonal fitting groove is provided on an inner surface of a connecting protrusion of the wire bobbin on which the first shaft fitting hole is provided so that the rotation of the wire bobbin is stopped by the rotation of the stopper when the braking is not performed by the stopper, And the shaft fitting hole is provided with a hexagonal fastening protrusion which is closely fitted to the hexagonal fastening groove and is fitted thereto.

The present invention can prevent a wire from being released from a wire bobbin by rapidly stopping the rotation of the wire bobbin when the wire is quickly released from the wire bobbin at a predetermined speed or more, It is possible to prevent the wire from being separated from the wire bobbin by the bobbin cover as well as to prevent the tangling and also to facilitate the separation and connection of the gear housing, The assemblability of housing the first reduction gear shaft having a portion and the second reduction gear shaft having a flat gear portion, as well as workability and work efficiency are greatly improved.

1 is a perspective view showing an example in which a decelerator equipped with a locking part of the present invention is installed.
2 is an exploded perspective view showing a configuration of a speed reducing apparatus provided with a latching portion of the present invention.
3 is a perspective view showing a decelerating device provided with a latching part of the present invention.
Fig. 4 is a configuration diagram showing a configuration of a speed reducing device provided with a latch portion according to the present invention.
5 is an exploded perspective view showing a structure of a gear housing of a speed reducing device provided with a latch portion according to the present invention.
FIG. 6 is an exploded perspective view showing a stopper of a speed reducing apparatus provided with a latch portion of the present invention. FIG.
7 and 8 are block diagrams showing a bobbin cover operation state of a speed reducing device provided with a latch portion according to the present invention.
FIG. 9 is a configuration view showing a state in which the auxiliary stopper portion of the decelerator with the stopper of the present invention is caught in the stopper.
10 and 11 are block diagrams showing a stopper operating state of a speed reducing apparatus provided with a latching portion according to the present invention.

Hereinafter, other objects and features of the present invention will be apparent from the following description of embodiments with reference to the accompanying drawings.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted in an ideal or overly formal sense unless explicitly defined in the present application Do not.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a deceleration device having a latching portion according to an embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

As shown in the drawings, the deceleration device with the stopper according to the present invention includes a gear housing 10, a wire bobbin 20, a stopper 30, and a bobbin cover 40.

The gear housing 10 is connected to the power means and is rotated by the power of the power means and is connected to the worm gear portion 11 of the first reduction gear shaft 12 and the second reduction gear And the flat gear portion 13 of the shaft 14 is accommodated therein.

The wire bobbin 20 is provided with a first shaft insertion hole 21 that is fitted in the second reduction gear shaft 14 of the gear housing 10 and the wire is wound.

The first reduction gear shaft 12 and the second reduction gear shaft 14 protrude from the gear housing 10 which connects the power means 101 to the first reduction gear shaft 12, So as to connect the wire bobbin 20 and the stopper 30 to the reduction gear shaft 14.

The first reduction gear shaft 12 is rotated by the power of the power means 101 and is rotated by the rotation of the first reduction gear shaft 12 so that the worm gear portion 11 And the wire bobbin 20 and the stopper 30 connected to the second reduction gear shaft 14 are rotated while the second reduction gear shaft 14 having the flat gear portion 13 that is orthogonal to the first reduction gear shaft 14 is rotated, The wire is wound around the wire bobbin 20 by the rotation of the bobbin 20 or the wound wire is loosened.

The power unit 101 may be a ball chain as shown in the drawing, or may be an electric motor, or any other means capable of transmitting rotational power.

The stopper 30 is provided with a second shaft insertion hole 31 which is fitted in the second reduction gear shaft 14 and is located between the gear housing 10 and the wire bobbin 20, The wire bobbin 20 is rotated at the same speed as the wire bobbin 20, and when the wire wound on the wire bobbin 20 is released at a speed faster than the normal speed, the rotation of the wire bobbin 20 is stopped.

That is, when the wire bobbin 20 and the stopper 30 are rotated at a normal speed by the rotation of the second reduction gear shaft 14, the second reduction gear shaft 14 and the wire bobbin 20 are rotated, One of gears of the flat gear portion 13 of the second reduction gear shaft 14 that is orthogonal to the worm gear portion 11 of the first reduction gear shaft 12 does not interfere with the rotation operation of the worm gear portion 12, Even if the braking force of the orthogonally coupled worm gear unit 11 and the flat gear unit 13 is released and the second reduction gear shaft 14 is rotated at a speed higher than the normal speed, The first fixing surface 211 of the wire bobbin 20 on the inner surface of the first shaft fitting hole 21 and the third fixing surface 211 of the inner surface of the second shaft fitting hole 31 of the stopper 30 Since the wire bobbin 20 is rapidly rotated at an abnormal speed, the wire wound around the wire bobbin 20 is fixed to the wire bobbin 20, The second reduction gear shaft 14 integrally coupled to the wire bobbin 20 and the stopper 30 are rotated together so that the second reduction gear shaft 14 and the second reduction gear shaft 14 are rotated by the stopper 30, The rotation of the wire bobbin 20 is stopped to block the unwinding of the wire, thereby preventing a safety accident due to the rapid descent of the hook bar connected to the wire.

To this end, the gear housing 10 is provided with a locking part 15 extending in the direction of the wire bobbin 20 extending in the second reduction gear shaft 14.

The stopper 30 of the present invention includes a stopper body 33 provided at a center thereof with an interval portion 32 through which a second shaft insertion hole 31 inserted into the second reduction gear shaft 14 passes, A position changing hole 35 provided along the longitudinal direction of the guide portion 34 and a guide groove 34 connected to the position varying hole 35, When the wire wound on the wire bobbin 20 is loosened at a speed higher than the normal speed, the wire bobbin 20 protrudes from the stopper body 33 by centrifugal force and is caught by the stopper body 15, And a stopper member 36 for stopping the rotation of the wire bobbin 20 connected to the second reduction gear shaft 14 in which the first reduction gear shaft 33 is inserted to stop the unwinding of the wire.

The stopper hole 36 is freely moved along the guide portion 34 provided on the stopper body 33 and is rotated by the normal speed of the second reduction gear shaft 14, When the stopper body 33 of the stopper body 36 is rotated, the position of the stopper tool 36 is changed while rotating along the stopper body 33 where the position of the stopper tool 36 is rotated. At this time, The stopper tool 36 is moved along the guide portion 34 to protrude from the stopper body 33 and the stopper body 33 is rotated by the stopper body 33 36 are moved to the upper side with respect to the stopper body 33, they are moved along the guide portion 34 and are drawn into the stopper body 33 side.

When the wire bobbin 20 and the stopper 30 are rotated at a normal speed by the normal rotation operation of the second reduction gear shaft 14 as described above, the stopper body 33 is positioned below the stopper body 33, The stopper member 36 is retracted toward the stopper body 33 in the process of being positioned on the upper side of the stopper body 33 so that the stopper member 15 extended to the gear housing 10, The second reduction gear shaft 14 does not interfere with the rotation operation of the wire bobbin 20 and the stopper 30, as well as the stopper hole 36,

It is also possible to separate the worm gear unit 11 of the first reduction gear shaft 12 from the flat gear unit 13 of the second reduction gear shaft 14 due to the breakage of the power means or the engagement of the wire bobbin 20 The stopper 30 connected to the second reduction gear shaft 14 to which the wire bobbin 20 is connected is also rapidly rotated when the wire wound around the wire bobbin 20 is quickly released. The stopper member 36 is positioned on the lower side of the stopper body 33 of the stopper 30. When the stopper member 36 protruding from the stopper body 33 is positioned on the upper side of the stopper body 33, The second reduction gear shaft 14 is prevented from being drawn into the body 33 and rotated along the stopper body 33 in a state of protruding from the stopper body 33 so as to be caught by the engagement portion 15, The second reduction gear shaft 14 interferes with the rotation of the bobbin 20 and the stopper 30, Of course, the rotation of the wire bobbin 20 and the stopper 30 is stopped.

As the rotation of the wire bobbin 20 is stopped, the unwinding of the wire wound on the wire bobbin 20 is stopped, thereby preventing a safety accident caused by wire loosening.

The reason that the stopper hole 36 is caught in the engagement portion 15 is that when the stopper body 33 rotates at a normal speed, the stopper hole 36 protruding from the lower side of the stopper body 33 is inserted into the stopper hole 33, When the stopper body 33 rotates faster than the normal speed, the stopper member 36 protrudes from the lower side of the stopper body 33. However, when the stopper body 33 rotates faster than the normal speed, Even when the stopper body 33 is positioned on the upper side of the stopper body 33 by the centrifugal force due to the rapid rotation of the stopper body 33, the stopper body 33 is not pulled toward the stopper body 33 and is positioned as the upper side of the stopper body 33 as it protrudes.

The guide portion 34 includes a first guide portion 341 and a second guide portion 342 symmetrically provided on both front and rear sides of the stopper body 33.

The position variable hole 35 passes through the first guide portion 341 and the second guide portion 342, respectively.

The stopper 36 may include a first moving surface 361 positioned in the first guide portion 341, a second moving surface 362 positioned in the second guide portion 342, The first movable surface 361 and the second movable surface 362 corresponding to the position variable hole 35 and the second movable surface 362 respectively corresponding to the first movable surface 361 and the second movable surface 362, And a connection pin 365 for connecting the fitting hole 364 and the position variable hole 35. [

The first moving surface 361 and the second moving surface 362 of the stopper opening 36 move freely along the first guide portion 341 and the second guide portion 342 of the guide portion 34, do.

Since the fitting hole 364 penetrating the first guide part 341 and the second guide part 342 is connected to the position variable hole 35 by the connecting pin 365, Thereby preventing the stopper opening 36 from completely escaping from the stopper opening 34.

The position variable hole 35 is formed in the longitudinal direction of the guide portion 34 so as to facilitate the stopper opening 36 to protrude from the guide portion 34 or to be pulled toward the guide portion 34 It is made up of a long shape.

The bobbin cover 40 is connected to both ends of the wire bobbin 20 at both sides and is connected to the wire bobbin 20 so that when the wire is wound toward the wire bobbin 20 or the wire is released from the wire bobbin 20, It is a means to prevent tangling.

The position changing hole 35 provided along the longitudinal direction of the guide portion 34 and the guide portion 34 and the stopper opening 36 connected to the position varying hole 35 are formed in the stopper 36, The stopper body 33 may be provided on both sides of the body 33 or may be provided radially with respect to the stopper body 33.

The bobbin cover 40 is provided with a fitting portion 41 which is fitted in the connecting protrusion 22 by itself so as to be elastically fit on both sides of the bobbin cover 40 A first locking protrusion 43 protruding from the upper end of the semicircular cover 42 and a second locking protrusion 43 protruding from the lower end of the semicircular cover 42. [ And an auxiliary locking projection 45 positioned between the first locking projection 43 and the second locking projection 44 and protruding from the cover 42. [

The bobbin cover 40 is formed by fitting the fitting portions 41 provided on both sides of the cover 42 to the connecting protrusions 22 provided at both side ends of the wire bobbin 20 with self- The connection boss 22 of the wire bobbin 20 is connected to the bobbin 20 so that the connection boss 22 of the wire bobbin 20 is freely rotatable with respect to the fitting portion 41 of the bobbin cover 40, It does not interfere with this rotation.

The bobbin cover 40 thus constructed covers the wire bobbin 20 when the wire is loosened from the wire bobbin 20 or the wire is wound toward the wire bobbin 20 as the wire bobbin 20 is covered and laid. To prevent tangling.

In addition, since the bobbin cover 40 is formed in a semicircular shape as shown in the drawing, the wire is loosened from the wire bobbin 20 as a part of the wire bobbin 20 is opened without laying the entire wire bobbin 20 And does not interfere with the wire winding operation toward the wire bobbin 20 at all.

The first locking protrusion 43 protruding from the upper end of the cover 42 and the second locking protrusion 44 protruding from the lower end of the cover 42 as well as the auxiliary locking protrusion 45, The bobbin cover 40 is not rotated 360 degrees. This prevents the wires from being separated from each other, as well as tangling of the wires and does not interfere with unwinding or winding of the wire from the wire bobbin 20.

7, since the first locking projections 43 of the bobbin cover 40 are positioned on the right side of the engaging portion 15 in the drawing, When the wire is wound or unwound by rotating the wire bobbin 20 by rotating the power means 101 of the bobbin cover 20 as shown in Fig. 8, the first locking projection portion 43 is caught by the engagement portion 15, 40, it is prevented that the bobbin cover 40 is positioned on the lower side of the wire bobbin 20, so that it can be prevented from tangling with each other or from being separated from the wire when the wire is unwound or wound.

9, when the wire is wound by rotating the wire bobbin 20 by rotating the power means 101 of the drying band moving up and down the hanging bar of the descending drying hood, the auxiliary staking hole portion 45 And the rotation of the bobbin cover (40) interferes with the engagement with the engaging portion (15).

Thus, the bobbin cover 40 is prevented from being completely rotated in the leftward direction or completely rotated in the rightward direction with respect to the wire bobbin 20.

The second reduction gear shaft 14 of the present invention is provided with a first fixing surface 141 formed in a plane and a second fixing surface 141 formed on the first shaft insertion hole 21 of the wire bobbin 20, And a second fixing hole 31 of the stopper 30 is provided with a third fixing surface 311 formed in a plane.

When the first shaft fitting hole 21 and the second shaft fitting hole 31 are fitted into the second reduction gear shaft 14 respectively, The second reduction gear shaft 14 and the first shaft fitting hole 21 and the second shaft fitting hole 31 are formed integrally with each other so that the surface 211 and the third fixing surface 311 are integrally fixed to each other. A separate piece work process for fixing can be omitted, so that the assembling efficiency and work efficiency due to assembly can be greatly improved.

The gear housing 10 includes a first housing portion 10a having a first bolting engagement hole 16 and a first contact surface 17 and a second housing portion 10b having a first bolting engagement hole 16, And a second housing portion 10b having a second bolting engagement hole 18 formed therein and having a second contact surface 19 which is in close contact with the first contact surface 17 in a corresponding manner.

The first contact surface 17 of the first housing part 10a and the second contact surface 19 of the second housing part 10b are brought into close contact with each other so as to correspond to each other, Since the gear housing 10 can be assembled by bolting the bolting engaging hole 16 and the second bolting engaging hole 18 into the gear housing 10, It is easy to accommodate the worm gear unit 11 provided in the first reduction gear shaft 12 and the flat gear unit 13 of the second reduction gear shaft 14 that is orthogonal to the worm gear unit 11.

When the worm gear unit 11 and the flat gear unit 13 are both worn and are to be replaced, the first housing unit 11 (or the second housing unit) 10a and the second housing part 10b can be easily separated and replaced and reassembled, so that replacement and repair workability is greatly improved.

The gear portion of the second reduction gear shaft 14 of the first reduction gear shaft 12 that is orthogonal to the worm gear portion 11 of the first reduction gear shaft 12 is prevented from being broken, A failure occurs in the first reduction gear shaft 12 and the second reduction gear shaft 14 or the first reduction gear shaft 14 is coupled to the second reduction gear shaft 14, The second fixing surface 211 provided in the first fitting hole 21 of the wire bobbin 20 and the third fixing surface 311 of the stopper 30 which are in close contact with the first bushing 141 are braked An inner surface of the connecting protrusion 22 on which the first axis fitting hole 21 of the wire bobbin 20 is provided is formed with a hexagonal shape so that the rotation of the wire bobbin 20 is stopped by the rotation of the stopper 30. [ A hexagonal fastening protrusion 30a is provided in the second shaft fitting hole 31 of the stopper 30 so as to be in close contact with the hexagonal fastening groove 20a and to be engaged with the hexagonal fastening groove 20a Respectively.

That is, the hexagonal fastening protrusion 30a is fitted into the hexagonal fastening groove 20a, and the wire bobbin 20 and the stopper 30 are integrally tightly joined together, Even if the second fixing surface 211 of the first fitting hole 21 of the wire bobbin 20 integrally coupled to the first fixing surface 141 of the stopper 30 loses its braking force due to abrasion, And prevents the wire bobbin 20 from rotating faster than the normal speed by the fixing surface 311.

The second fixing surface 211 of the wire bobbin 20 integrally coupled to the first fixing surface 141 of the second reduction gear shaft 14 and the third fixing surface 311 of the stopper 30 The hexagonal fastening protrusion 30a of the stopper 30 is tightly coupled to the hexagonal fastening groove 20a of the wire bobbin 20 even if the braking force is lost due to wear of the wire bobbin 20, The stopper 36 of the stopper 30 is rotated by the centrifugal force due to the acceleration of the stopper 30 integrally coupled to the wire bobbin 20 by the second reduction gear shaft 14, The rotation of the wire bobbin 20 is stopped by the third fixing surface 311 of the stopper 30 so that the wire bobbin 20 is rotated at a speed higher than the normal speed by the rotation of the wire bobbin 20 by the stopper 15 of the housing 10, .

The wire bobbin 20 and the stopper 30 can be easily fastened to each other by fastening the hexagonal fastening recess 20a and the hexagonal fastening protrusion 30a so as to correspond to each other, Since the wire bobbin 20 and the stopper 30 can be firmly fixed, the stopping operation of the wire bobbin 20 can be facilitated by the stopping operation of the stopper 30. [

As described above, the present invention has been described with reference to particular embodiments, such as specific elements, and specific embodiments and drawings. However, it should be understood that the present invention is not limited to the above- And various modifications and changes may be made thereto by those skilled in the art to which the present invention pertains.

Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention

10: gear housing 10a: first housing part
10b: second housing part 11: worm gear part
12: first reduction gear shaft 13: flat gear unit
14: second reduction gear shaft 15:
16: first bolting engagement hole 17: first contact surface
18: second bolting engagement hole 19: second contact surface
20: wire bobbin 21: first shaft fitting hole
22: connecting protrusion 30: stopper
31: second shaft fitting hole 32:
33: stopper body 34: guide portion
35: position variable hole 36: stopper hole
40: bobbin cover 41:
42: cover 43:
44: second restraining part 45: auxiliary restraining part
141: first fixing surface 211: second fixing surface
311: third fixing surface 341: first guide portion
342: second guide portion 361: first moving surface
362: second moving surface 363: engaging surface
364: insertion hole 365: connecting pin

Claims (6)

A flat gear portion 14 of a second reduction gear shaft 14 connected to the power means and rotated by the power of the power means and meshed with the worm gear portion 11 of the first reduction gear shaft 12 and the worm gear portion 11 And a first shaft insertion hole 21 fitted to the second reduction gear shaft 14 of the gear housing 10 and a wire bobbin And a second shaft insertion hole 31 fitted in the second reduction gear shaft 14. The second shaft insertion hole 31 is located between the gear housing 10 and the wire bobbin 20, The second reduction gear shaft 14 is rotated at the same speed as the wire bobbin 20 so as to stop the rotation of the wire bobbin 20 when the wire wound on the wire bobbin 20 is quickly released above the normal speed, A stopper body (33) having a center portion (32) in which a second shaft insertion hole (31) A guide portion 34 provided in the topper body 33 and a position variable hole 35 provided along the longitudinal direction of the guide portion 34 and the guide portion 34 connected to the position variable hole 35, And the wire wound on the wire bobbin 20 is quickly released from the stopper body 33 by centrifugal force to be fastened to the stopper body 15 by the centrifugal force so that the stopper body 33 is inserted A stopper 30 having a stopper hole 36 for stopping the rotation of the wire bobbin 20 connected to the reduction gear shaft 14 so as to stop the unwinding of the wire, And a bobbin cover (40) having a semicircular cover (42) to prevent dislocation and tangling of the wire when the wire is wound on the wire bobbin (20) In a reduction device provided with a locking part Come on.
The gear housing 10 is provided with a latching portion 15 extending in the direction of the wire bobbin 20 extending in the second reduction gear shaft 14 and at both sides of the wire bobbin 20, Respectively,
On both sides of the bobbin cover 40,
And fitting portions 41, which are self-resiliently fitted in the connecting protrusions 22,
A first locking protrusion 43 protruding from the upper end of the semicircular cover 42 and a second locking protrusion 44 protruding from the lower end of the semicircular cover 42;
And a second locking protrusion (45) located between the first locking protrusion (43) and the second locking protrusion (44) and projecting from the cover (42).
delete delete The method according to claim 1,
The second reduction gear shaft 14 is provided with a first fixing surface 141 formed in a plane,
The wire bobbin (20) has a second shaft fixing hole (21) formed with a second fixing surface (211)
The second shaft receiving hole 31 of the stopper 30 is provided with a third fixing surface 311 formed in a plane,
When the first shaft fitting hole 21 and the second shaft fitting hole 31 are fitted into the second reduction gear shaft 14, the second fixing surface 211 And the third fixing surface 311 are brought into close contact with each other,
The first reduction gear shaft 14 and the second reduction gear shaft 14 are fixed to the first reduction gear shaft 14 and the second reduction gear shaft 14, The rotation of the wire bobbin 20 is stopped by the rotation of the stopper 30 when the second fixing surface 211 and the third fixing surface 311 of the stopper 30 are not braked by abrasion,
A hexagonal coupling groove 20a is formed on the inner surface of the coupling protrusion 22 where the first shaft insertion hole 21 of the wire bobbin 20 is provided and the second shaft insertion hole 31 of the stopper 30 And a hexagonal fastening protrusion (30a) which is in close contact with the hexagonal fastening groove (20a) and is fitted into the hexagonal fastening groove (20a).
The method according to claim 1,
The gear housing (10)
A first housing portion 10a provided with a first bolting engagement hole 16 and having a first contact surface 17;
A second housing part having a second bolting engagement hole 18 corresponding to the first bolting engagement hole 16 and having a second contact surface 19 which is in close contact with the first contact surface 17 10b,
The first contact surface 17 of the first housing part 10a and the second contact surface 19 of the second housing part 10b are brought into close contact with each other so as to correspond to each other, (16) and the second bolting engagement hole (18) are bolted to each other.
delete

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