JPH0538420Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a reel stand driving device for a recording/reproducing device such as an audio tape recorder or a video tape recorder.

(Prior Art) A recording/reproducing device such as a video tape recorder that uses magnetic tape as a recording medium has a magnetic tape drive device. The magnetic tape drive includes a reel stand drive for winding the tape. The tape winding torque in this reel stand driving device needs to be switched according to each operation mode, and needs to be switched so that it is weak in recording/reproducing mode and strong in fast forward or rewind mode.

As one of the tape winding torque switching devices in the reel stand drive device, the power transmission system consisting of belts, idlers, gears, etc. is equipped with a torque limiter mechanism that is set to the torque suitable for each operating mode, and can be used for various switching. There is a device in which a limiter mechanism suitable for an operating mode is selected by means. The one described in Japanese Patent Application Laid-Open No. 56-93132 is one of them.

Another example of a tape winding torque switching device in a reel stand driving device is to transmit the torque from the motor that is the drive source directly to the reel stand, and to change the voltage generated by switching the voltage applied to the motor. Switch the torque,
There is also a direct drive system that provides torque suitable for each operating mode.

(Problems to be solved by the invention) Among the above conventional reel stand drive devices, although the former has the advantage of being able to obtain stable torque, each torque limiter mechanism is set to a torque suitable for each operation mode. Since a mechanism for selectively switching this is required, there are problems in that the mechanical components are complicated and mechanical noise is likely to be generated.

In addition, the latter of the conventional examples, the direct drive method, has the advantage of simplifying the mechanical components, but since the rotation accuracy of the motor directly affects torque fluctuations and rotational unevenness, Strict rotation accuracy is required. In addition, a wide rotational speed range and voltage range are required for the motor,
In particular, rotation accuracy in the low voltage and low rotation range required for recording and reproducing mode is strictly required, so a highly reliable motor with good starting performance at low voltage is required, which results in an expensive motor. There is a problem.

The purpose of this invention is to solve the problems of conventional reel stand drive devices, and to switch the reel stand between low torque and high torque with a simple configuration and without using a high-performance motor. An object of the present invention is to provide a reel stand driving device that achieves the above-mentioned effects.

(Means for Solving the Problems) The present invention provides a reel stand drive device including a first rotary body rotationally driven by a drive source, a first rotary body disposed coaxially with the first rotary body, and a first rotating body disposed coaxially with the first rotary body and a second rotating body rotatable relative to the rotating body for driving the reel stand; and a second rotating body rotatable integrally with the second rotating body and movable in the axial direction of the second rotating body. an electromagnetic clutch having a movable iron core; and a torque limiter provided between the movable iron core and the first rotating body to transmit the rotational force of the first rotating body to the movable iron core in one operation mode of the electromagnetic clutch. , disposed between the first rotating body and the movable iron core,
and a gear for increasing the speed and transmitting the rotational force of the first rotating body to the movable iron core in another operating mode of the electromagnetic clutch, and releasing the operation of the torque limiter in another operating mode of the electromagnetic clutch. In addition, the first rotating body and the movable iron core are connected via the gear.

(Function) In one operation mode of the electromagnetic clutch, the rotational force of the first rotating body driven by the drive source is transmitted to the movable iron core of the electromagnetic clutch via the torque limiter, and the rotational force of the first rotating body driven by the drive source is transmitted to the movable iron core of the electromagnetic clutch, The rotating body is driven to rotate with low torque. In another mode of operation of the electromagnetic clutch, the operation of the torque limiter is released, the first rotating body and the movable iron core are connected by a speed increasing gear, and the second rotating body is rotationally driven with high torque.

(Example) In FIGS. 1 to 4, a notch or hole is formed in a part of the chassis 1 of the tape recorder. 4 is installed. A mounting angle 2 is further mounted on top plate 4 by screws 5. A cylindrical portion 47 is press-molded in the center of the mounting angle 2, and this cylindrical portion 47
A support post 6 is fixed to. A pulley 8, which is a first rotating body, is rotatably attached to the lower end of the support column 6, and the pulley 8 is rotatably driven by a drive source (not shown) via a belt 7.
An internal gear 9 is formed on the inner peripheral surface of the pulley 8, and a felt 10 is bonded to the inner bottom surface of the pulley 8. A friction plate 11 rotatably attached to the boss portion of the pulley 8 is mounted on the felt 10. Further, on the friction plate 11, a polyslide washer 12, a leaf spring 13, and a crimp collar 14 are placed in this order so as to surround the boss portion of the pulley 8, and on the crimp collar 14, furthermore,
The boss portion 48 of the pulley 15 as a second rotating body is placed on it, and the boss portion 48 of the pulley 15 and the crimp collar 14 fit into each other so that the pulley 15 and the crimp collar 14 are attached to the support column 6. It is designed to rotate around the . Pulley 15
The main body portion of is formed into a cup shape, and a compression spring 17 is dropped into this cup-shaped main body portion. A spring receiver 16 and a polyslide washer 49 are positioned above the spring 17 by being inserted through the support column 6. When the washer 49 comes into contact with the lower surface of the mounting angle 2, the spring 17 is compressed. Due to the elasticity of the pulley 15, crimp collar 1
4. The leaf spring 13, washer 12, and friction plate 11 are pushed down, and the friction plate 11 is brought into pressure contact with the felt 10 with a predetermined pressure contact force.

A movable iron core 18 is mounted above the crimp collar 14 so as to be movable up and down using the outer peripheral surface of the crimp collar 14 as a guide. The movable iron core 18 has a plurality of protrusions in the axial direction on the inner circumference, and by fitting these protrusions into the vertical grooves 25 of the boss portion of the pulley 15, the movable iron core 18 can move relative to the pulley 15 in the axial direction. and can rotate integrally with the pulley 15. A gear 19 is located in the middle of the outer periphery of the movable iron core 18.
is formed. A plurality of leaf springs 13 are provided, and the free ends of the plurality of leaf springs are fixed to the lower end of the movable iron core 18 by a lock pin 20. When the pin 20 is in the state shown in FIG.
8 is pulled down and fitted into the hole 50 of the friction plate 11, so that the friction plate 11 and the movable iron core 18 can rotate together.

The upper plate 4 constitutes a part of an electromagnet that attracts the movable iron core 18, and a fixed iron core 21 is fixed to the center hole of the upper plate 4 so as to surround the boss portion 48 of the pulley 15. A case 24 containing a drive coil 22 is also fixed to the upper plate 4 by caulking. The coil 22 is wound around the fixed iron core 21, and insulating sheets 26, 26 are interposed above and below the coil 22 between the upper plate 4 and the case 24. A conical recess is formed in the lower part of the fixed core 21, and the conical upper end of the movable core 18 can fit into this recess. A polyslide washer 27 is adhered to it. Coil 22, fixed core 21, movable core 1
The components including 8 constitute an electromagnetic clutch.

On the lower surface of the case 24, as shown in FIG. 3, three pairs of columns 28, 51 are fixedly planted downward.
1 is rotatably provided with gears 29 and 30, respectively. Each pair of gears 29 and 30 are always in mesh with each other, and each gear 29 is always in mesh with gear 9 of pulley 8. Gear 1 of the movable iron core 18
9 is a movable iron core 1 as shown in FIG.
Each gear 30 is arranged so that it meshes with each gear 30 in a state where 8 is moved upward.

As shown in FIGS. 1 and 2, a coil 22 is provided between the mounting angle 2 and the top plate 4.
A lead fixing plate 31 is fixed as a relay part for connecting the terminal of the lead to an external circuit. The lead fixing plate 31 has lead wires 32 for external extraction.
a hole into which the lead fixing plate 31 is fitted, a protrusion 33 for fitting into the upper plate 4 and positioning the lead fixing plate 31, and a hole into which the coil 2 is fitted.
A pin 34 is provided for hooking and leading out the second terminal. The case 24 has a lead fixing plate 3.
An opening 36 is provided near the attachment part 1, and when the lead wire 32 is fitted into the hole of the lead fixing plate 31, the conductive end portion 35 of the lead wire 32 advances to the side of the opening 36. The end portion of the coil 22 pulled out from the opening 36 can be wound around the conductive portion 35 and soldered.

The idler lever 39 is fitted to the outer periphery of the cylindrical portion 47 of the mounting angle 2, and a spring locking plate 40 is fitted, and a retaining ring 52 is further fitted to prevent the idler lever 39 and the spring locking plate 40 from coming off. is being done. A support post 38 is provided at the tip of the idler lever 39. An idler 37 is rotatably supported by the support column 38 below an idler lever 39. The idler lever 39 has an elongated hole that fits into the cylindrical portion 47 of the mounting angle 2, and is movable in the longitudinal direction. , the outer peripheral surface of the idler 37 is pressed against the outer peripheral surface of the pulley 15. A guide plate 42 is fixed to the support column 38 below the idler 37. The guide plate 42 is integrally formed with upper and lower guide parts 43 and 44,
By sandwiching the edges of the notch or hole in the chassis 1, the guide portions 43 and 44 prevent rattling when the idler 37 moves with the swinging of the idler lever 39. A leaf spring 45 is press-fitted and fixed under the guide plate 42, and a felt 46 fixed to the bent free end of the leaf spring 45 is pressed against the outer periphery of the pulley 8, so that the felt 46 is attached to the pulley 8. This friction force causes the idler 3 to
7 can be moved. Reel stands (not shown) are arranged on both sides of the idler 37, and the outer circumferential surface of the idler 37 comes into pressure contact with one of the reel stands depending on the moving direction of the idler 37. The surface of the pulley 8 to which the felt 46 is pressed has a stepped surface 53 as shown in FIG. The frictional force between the pulley 8 and the pulley 8 does not fluctuate. The stepped surface 53 of the pulley 8 may be formed by providing a plurality of concentric lines around the pulley 8, or may be formed by forming a single line in a spiral shape.

Polyslide washers 54, 5 are provided between the idler 37, the idler lever 39, and the guide plate 42.
5 is interposed, and a polyslide washer 56 is also installed between the mounting angle 2 and the idler lever 39.
is interposed. These washers and the washers 12, 27, and 49 described above are interposed between members that rub against each other, so as to reduce the frictional force between the members that rub against each other.

Next, the operation of the above embodiment will be explained for each mode.

(1) Recording, playback, special playback, and unloading mode The coil 22 is not excited and the movable iron core 18 is in the second mode.
As shown in the figure, the gear 19 is pulled down by the leaf spring 13 and separated from the gear 30. The pulley 8 is rotationally driven by a drive source via a belt 7, and the rotational force of the pulley 8 is transmitted to a movable iron core 18 having a lock pin 20 via a torque limiter having a felt 10, a friction plate 11, and a compression spring 17. The pulse is transmitted, and the pulley 15 is rotationally driven integrally with the movable iron core 18, and furthermore, the idler 37, which is in pressure contact with the pulley 15, is rotationally driven. The felt 46 receives a frictional force in the direction of the rotation of the pulley 8, and the guide plate 42, the support column 38, and the idler 37, which are substantially integral with the felt 46, are moved in the direction of the frictional force, so that the outer peripheral surface of the idler 37 is moved in the direction of the rotation of the pulley 8. The idler 37 is brought into pressure contact with the outer peripheral surface of one of the reel stands, and the rotational force of the idler 37 is transmitted to that reel stand. At this time, the rotational torque of the reel stand is limited by the set torque of a torque limiter comprising the felt 10, the friction plate 11, and the spring 17. In this mode of operation, normal recording, playback, special playback such as double speed playback, tape unloading, etc. are performed.

Note that when the pulley 8 is rotated in the opposite direction, the idler 37 is moved in the opposite direction and brought into pressure contact with the other reel stand, and is also rotated in the opposite direction to perform regeneration by reverse.

(2) Fast-forward and rewind mode In this mode, the coil 22 is excited, and as shown in FIG. It rises against the elasticity. As a result, the lock pin 20 comes out of the hole 50 of the friction plate 11, and
While the operation of the torque limiter is released, the gear 19 of the movable iron core 18 meshes with the gear 30. The rotational force of the pulley 8 driven by the drive source via the belt 7 is applied to the gear 9 of the pulley 8, the gear 29, and the gear 3.
0, is transmitted to the movable core 18 via a speed increasing gear train consisting of gears 19, and the movable core 18 is driven to rotate at high speed. The rotational force of the movable iron core 18 is further applied to the pulley 1.
5. The information is transmitted to the idler 37, and the idler 37, which moves according to the direction of rotation, presses against one of the reel stands and drives this reel stand to rotate at high speed. Pulley 8 as the first rotating body and pulley 1 as the second rotating body
Since the gear train intervening between 5 and 5 can be regarded as a rigid body,
The pulley 15 and the reel stand with which the pulley 15 comes into pressure contact are driven to rotate with high torque. For example, if the speed increase ratio of the above gear train is set to about 3.3 times, the reel stand can be driven at about 10 times the speed by just increasing the speed of the drive source about 3 times, so it can be used as a drive source. The motor does not need to be of such high performance.

Here, when the reel stand is being driven to rotate at high speed as described above, the lock pin 20 is attached to the friction plate 11.
felt 10 without slipping out from the hole 50,
Assuming that the operation of the torque limiter consisting of the friction plate 11 etc. is not released, the rotation speed of the movable iron core 18 will be lower than the rotation speed of the pulley 8 which is the first rotating body. As a result, the slip rate of the torque limiter increases significantly, which deteriorates the durability of the torque limiter and increases the load on the transmission system due to torque limiter slip in fast forward and rewind modes.

However, according to the above embodiment, when the reel stand is rotated at high speed in the fast forward and rewind modes, the lock pin 20 is inserted into the hole 5 of the friction plate 11.
Since the operation of the torque limiter is canceled by exiting the torque limiter, there is no deterioration in the durability of the torque limiter, and there is no increase in the load on the transmission system due to slipping of the torque limiter, so there is an effect that the power consumption of the drive source can be reduced.

In the embodiments described above, the pulley, which is the first rotating body, is driven to rotate from the motor as the drive source via the belt, but the first rotating body is now directly driven by the direct drive motor. You can. In this case, since the direct drive motor can be easily rotated at high speed, it is not necessarily necessary to use a speed increasing gear train when attempting to rotate the reel stand with high torque. The embodiment shown in FIG. 6 is an example of this.

In FIG. 6, a clutch plate 58 replaces the gears 29 and 30 in the previous embodiment, and the clutch plate 58 uses its elasticity to fit the arm-shaped attachment portion 59 into the fitting portion of the pulley 8. As a result, it is integrally attached to the pulley 8. A partial gear 60 is formed at the tip of the clutch plate 58, and this gear 60 is normally gear 1 of the movable iron core 18.
9, the coil 22, the fixed core 21,
When the electromagnetic clutch having the movable core 18 is energized and the movable core 18 is attracted toward the fixed core 21, the gear 19 of the movable core 18 meshes with the partial gear 60. Since the other configurations are the same as those of the embodiment described above, the same components as those of the embodiment described above are given the same reference numerals, and the explanation of the structure will be omitted.

Assuming that the coil 22 is not energized now, as shown in FIG. The torque is transmitted to the iron core 18 and the pulley 15, and further transmitted to one reel stand via the idler 37, and this reel stand is driven to rotate at a low speed by the torque limited by the torque limiter. Next, when the coil 22 is excited, the movable iron core 18 moves to the fixed iron core 21.
The gear 19 of the movable iron core 18 engages with the partial gear 60 of the clutch plate 58. Therefore, the pulley 8 and the movable iron core 18 are directly connected via the clutch plate 58, and the pulley 15, the idler 37 following it, and one reel stand are rotationally driven with high torque. Further, at this time, the direct drive motor that rotationally drives the pulley 8 is driven to rotate at high speed, and therefore, one of the reel stands is driven to rotate at high speed and with high torque.

Note that a plurality of clutch plates 58 may stand up around the movable iron core 18 and a partial gear may be formed at the tip of each clutch plate, or they may be formed in a disc shape so as to surround the entire circumference of the movable iron core 18. A gear may be formed all around the inner peripheral edge.

As in the embodiments shown in FIGS. 1 to 5, the pulley serving as the first rotating body is rotationally driven from a drive source located elsewhere via a belt, or as in the embodiment shown in FIG. It is optional whether or not the pulley, which is the first rotating body, is directly driven by a direct drive motor.
The drive system can be easily changed by providing a clutch plate 58 instead of the clutch plates 9 and 30 as in the example shown in FIG.

Next, the embodiments shown in FIGS. 7 and 8 will be described. In this embodiment, the positions of the fixed iron core and the movable iron core of the electromagnetic clutch are reversed vertically.

7 and 8, a mounting angle 62 is fixed to the chassis 61 of the tape recorder, and a column 63 is fixed by the mounting angle 62. A fixed core 67 of an electromagnetic clutch is fitted and fixed to the lower end of the column 63, and a lower plate 64 is fixed to the fixed core 67. A case 65 is fixed to the lower plate 64, and a drive coil 66 is arranged in a space surrounded by the lower plate 64 and the case 65. A connecting collar 69 is rotatably inserted into the support column 63 above the fixed iron core 67.
A movable core 68 of an electromagnetic clutch is arranged around the outer periphery of the connecting collar 69. The movable iron core 68 can move relative to the connecting collar 69 in the axial direction and can rotate integrally with the connecting collar 69 by fitting the grooves and protrusions in the axial direction between the movable iron core 68 and the connecting collar 69. . A plate spring 70 is disposed on the upper surface of the movable iron core 68, a lock pin 71 is fixed to the movable iron core 68 through one end of the plate spring 70, and the other end of the plate spring 70 is fixed to the flange of the connecting collar 69. There is. The coil 66, the lower plate 64, the case 65, the fixed core 67, and the movable core 68 constitute an electromagnetic clutch.

A pulley 72 serving as a second rotating body is also arranged above the connecting collar 69 on the support column 63 . An idler for driving the reel stand is in pressure contact with the outer peripheral surface of the pulley 72, as in the previous embodiment. The lower end of the boss portion of the pulley 72 is connected to the connecting collar 6 shown in FIG.
9 and the recesses therebetween, so that the pulley 72 and the connecting collar 69 can rotate together. A boss part of a friction plate 73 is fitted onto the outer periphery of the boss part of the pulley 72, and a spring receiver 78 is fitted and fixed to the boss part of the friction plate 73 inside the pulley 72, and below the spring receiver 78. Pulley 75 as the first rotating body
is rotatably fitted. The pulley 75 is rotationally driven by a drive source via a belt or by a direct drive motor. A felt 76 is fixed to the ceiling surface of the pulley 75, and a compression spring 79 is interposed between the pulley 75 and the spring receiver 78, and the elasticity of the spring 79 causes the felt 76 and the friction plate 73 to move. It is designed to be pressed into contact. A washer 77 is interposed between the friction plate 73 and the flange of the connecting collar 69. As shown in the figure, the movable iron core 68 normally moves up along the boss portion of the connecting collar 69 due to the elasticity of the leaf spring 70, and the lock pin 71 moves up into the hole 74 of the friction plate 73.
is engaged in.

A pair of gears 81 and 82 are provided on the case 65.
The gear 81 is always in mesh with the internal gear 80 of the pulley 75. A gear 83 is formed around the movable iron core 68. This gear 83 can mesh with the gear 82 when the movable iron core 68 is lowered, but when the movable iron core 68 is raised as shown in the figure, the gear 83 can be engaged with the gear 82.
3 is spaced apart from the gear 82.

As shown in the figure, the movable iron core 68 rises and the gear 83
When the gear 82 and the gear 82 are separated, the rotational force of the pulley 75 is transmitted to the movable core 68 via the torque limiter made up of the felt 76 and the friction plate 73 and the pin 71, and further transmitted to the pulley 72 via the connecting collar 69. be done. Therefore, the pulley 72 is driven to rotate at low torque and low speed through the intervention of the torque limiter.

Next, when the coil 66 is energized, the movable iron core 68 is attracted to the fixed iron core 67 and lowered, the gear 83 meshes with the gear 82, and the pin 71 is moved against the friction plate 7.
Get out of the hole 74 in No. 3. Therefore, the rotational force of the pulley 75 is transmitted to the movable iron core 68 via the gear trains 80, 81, 82, 83, and further to the connecting collar 69.
The torque is transmitted to the pulley 72 via the pulley 72, and the pulley 72 is driven to rotate at high torque and high speed.

In each of the embodiments described above, when the second rotary body is driven to rotate at low torque, the gear train or clutch plate required when the second rotary body is driven to rotate at high torque rotates with the rotation of the first rotary body. However, in the embodiment shown in FIG. 9, when the second rotating body is driven to rotate with low torque, the gear train or the clutch plate is not rotated to reduce the load.

In FIG. 9, the movable iron core 86 of the electromagnetic clutch is connected to the boss portion 87 of the pulley, which is the second rotating body.
is provided to be relatively movable in the axial direction and rotatable integrally with the pulley, and the movable iron core 86
A pair of gears 92 and 93 are supported by. The gear 93 is always engaged with the gear 94 of the movable core 86, and when the movable core 86 is raised by driving an electromagnetic clutch (not shown), the gear 92 is engaged with the internal gear 91 of the pulley 85.

Now, as shown in the figure, the electromagnetic clutch is not driven and the movable core 86 is lowered by the elasticity of the compression spring (not shown), and the gears 91 and 92 are separated, and the friction plate 89 is pressed against the felt 88 of the pulley 85.
Assuming that the lock pin 90, which is pressed into contact with the movable iron core 86 and is fixed to the movable iron core 86 via a plate spring (not shown), is engaged with a hole in the friction plate 89, the rotational force of the pulley 85 is applied to the felt 88 and the friction plate. The torque is transmitted to the movable core 86 and the pulley, which is the second rotating body, through the torque limiter 89, and the pulley, which is the second rotating body, is driven to rotate with low torque and at low speed. At this time, the gears 92 and 93 revolve with the rotation of the movable iron core 86, but do not rotate.

Next, when the movable core 86 is raised by driving an electromagnetic clutch (not shown), the rotational force of the pulley 85 is transmitted to the movable core 86 and the second rotating body via the gear trains 91, 92, 93, and 94, and The second rotating body is driven to rotate at high torque and high speed.

Each of the embodiments described above uses an electromagnetic clutch to switch between high-torque drive and low-torque drive, so switching from the outside is easy and the switching system can be simplified. .

In each of the embodiments, the driving means for the first rotating body is arbitrary. For example, a motor for tape loading may be used as a driving source to drive the first rotating body, or a motor as a driving source may be used to drive the first rotating body. Alternatively, the flywheel may be driven to rotate, and the first rotating body may be driven to rotate from the flywheel via a belt.

(Effects of the invention) According to the invention, a torque limiter is used when driving the second rotating body for driving the reel stand with low torque, while a torque limiter is used when driving the second rotating body with high torque. Since the transmission system is connected by a speed increasing gear and the operation of the torque limiter is released, the torque limiter operates while the second rotating body is driven to rotate at high speed and high torque by the speed increasing gear. Therefore, it is possible to prevent deterioration of the durability of the torque limiter and an increase in the load on the transmission system due to slippage of the torque limiter, and it is possible to save power of the drive source. Furthermore, by arbitrarily setting the gear ratio of the speed increasing gear, it is possible to obtain low speed, low torque rotation and high speed, high torque rotation without using a high performance motor, and the torque can be switched using an electromagnetic clutch. , the switching mechanism can be simplified. Furthermore, the gear for connecting the movable iron core and the first rotating body to obtain high speed and high torque can be incorporated into the reel stand drive unit, so the reel stand drive unit can be downsized. Furthermore, since the electromagnetic clutch releases the torque limiter operation when the movable iron core and the first rotating body are connected by gears, the load can be reduced by the amount required to rotate the torque limiter. .

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the present invention;
The figure is a sectional view taken along the line - in Fig. 1, Fig. 3 is a partially sectional plan view showing the first rotating body and gear portion of the above embodiment, and Fig. 4 is a sectional view taken along the line - - in Fig. 1.
5 is a side view showing an enlarged part of the first rotating body used in the above embodiment,
Fig. 6 is a longitudinal sectional view showing another embodiment of the present invention, Fig. 7 is a partially sectional side view showing still another embodiment of the invention, and Fig. 8 is a movable core assembly in the same embodiment. FIG. 9 is a partially cutaway perspective view showing a portion of the present invention, and FIG. 9 is a longitudinal sectional view showing only the main part of still another embodiment of the present invention. 8...First rotating body, 10...Felt constituting the torque limiter, 11...Friction plate constituting the torque limiter, 15...Second rotating body, 18...
...Movable iron core, 9, 29, 30, 19...Gear, 6
0... Gear, 68... Movable iron core, 72... Second rotating body, 75... First rotating body, 80, 81, 82,
83... Gear, 85... First rotating body, 86... Movable iron core, 91, 92, 93, 94... Gear.

Claims (1)

[Claims for Utility Model Registration] A first rotating body rotationally driven by a drive source, and a reel stand disposed coaxially with the first rotating body and rotatable with respect to the first rotating body. a second rotary body for driving; an electromagnetic clutch having a movable iron core that is rotatable integrally with the second rotary body and movable in the axial direction of the second rotary body; and the movable iron core; a torque limiter provided between the first rotating body and transmitting the rotational force of the first rotating body to the movable core in one operation mode of the electromagnetic clutch; a gear disposed between the electromagnetic clutch and configured to speed up and transmit the rotational force of the first rotating body to the movable iron core in another operating mode of the electromagnetic clutch; A reel stand drive device that releases the operation of the torque limiter and connects the first rotating body and the movable iron core via the gear.