KR950009980Y1 - Mode exchange apparatus for magnetic recorder and player - Google Patents

Abstract

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Description

Mode converter of magnetic record player

1 is a plan view showing the configuration of a conventional idler mechanism.

2 is a longitudinal sectional view showing the configuration of a conventional mode converter.

3 is a longitudinal sectional view showing another embodiment of the conventional mode converter.

Figure 4 is a longitudinal cross-sectional view showing the configuration of the mode conversion device according to the present invention.

* Explanation of symbols for main parts of the drawings

40: clutch for idler 41: base

43: input gear pulley 44,44 ': friction member

45: clutch gear 46,46 ': spring

47: cap 48: idler arm

50: idler 50a, 50b: small gear

51: reel gear part 51a, 51b: upper and lower gear

60: rotation lever 62: drive cam

The present invention relates to a mode converting apparatus of a magnetic recording and reproducing apparatus, and more particularly, to a mode converting apparatus which maintains reliability for a long time by preventing the conversion support of the magnetic recording and reproducing portion from rotating at high speed.

A typical idler mechanism is shown in Figure 1 of a typical embodiment thereof.

In the figure, 1 is a supply reel table and 1 'is a take-up reel table. An idler mechanism 3 for driving them is provided between the supply reel table 1 and the take-up reel table 1'.

When the idler mechanism 3 transmits power to the input unit 4 via the belt 2, the idler 8, which is fixed to the idler arm 5 and engaged with the gear of the input unit 4, rotates the input unit 4. The gear part of the feed reel table 1 or the take-up reel table 1 'is engaged with and driven according to the direction.

2 is a cross-sectional view and a bottom view showing the main portion of the idler mechanism, respectively, as shown in the figure, the friction member (7) is attached to the lower surface of the front end of the idler arm (5), the front end of the idler arm (5) The idler 8 is inserted into the shaft 6 fixed to the shaft, the cylindrical spring 9 is inserted into the lower shaft portion, and the washer 10 is fixed to the lower end portion. In addition, the input unit 4 has a friction member 13, a clutch gear 14, a friction member 15, an input gear pulley 16, and a spring 17 from the lower side of the upper support plate 12 on the support member 11. ) Is in turn.

One side of the conventional idler mechanism as described above is provided with a mode conversion device for mode conversion. The conventional mode conversion device includes a connecting gear 19 rotatably coupled to the shaft 18, and the connecting gear. A spring 20 for holding the upper portion 19 upward, a rotation lever 20 rotatably coupled to the shaft 21 to lift the connecting gear 19, and a slide for rotating the rotation lever 20. The operating plate 22 is comprised.

In the conventional idler mechanism as described above, the idler 8 is selectively configured to contact the feeding reel table 1 or the reeling reel table 1 'according to the rotational direction of the driving force transmitted from a separate driving source. As shown in FIG. 2, when the connecting gear 19 is in contact with the clutch gear 14, regeneration or reverse regeneration is performed.

Then, in accordance with the operation of the slide operating plate 22 in the state of FIG. 2, the pivoting lever 20 rotates so that the connecting gear 19 moves downward, and the connecting gear 19 is inputted with the clutch gear 14. When engaged with the gear part of the gear pulley 16, it is possible to perform the fast forward mode, that is, the forward fast forward mode and the reverse fast forward mode (the mode converter REW of the FF magnetic recorder).

The conventional mode converter as described above has a problem that the conversion support is worn by high speed rotation, the reliability deteriorates with long-term use.

3 is a longitudinal cross-sectional view of a main part according to another embodiment of the conventional mode conversion device. As shown in FIG. 3, the lower gear 32 meshing with the input gear pulley 31 is coupled to the shaft 30. The upper gear 33 is elastically supported in the upper direction by the spring 34 in the upper portion, and engaged with the upper gear 33 at the tip of the idler arm 36 rotatably coupled to the upper end of the shaft 30. An idler 36 is coupled, and a rotation lever 37 for moving the upper gear 33 in the vertical direction and a slide operation plate 38 for rotating the pivot lever 37 are provided. have.

As shown in FIG. 3, the conventional mode converting apparatus can perform the replay or reverse play mode in the state where the upper gear 33 is moved upward, and the action of the slide operation plate 38 is shown. When the rotation lever 37 rotates so that the upper gear 33 meshes with the lower gear 32 in the form of teeth, the driving force is directly connected to perform the fast-winding mode.

However, the mode converter of FIG. 3 has a structure in which the upper gear 33 moves up and down to mesh with the lower gear 32, or is separated, so that the driving torque is changed so that the axial force is large when operating. It was a fault that occurred.

The present invention is devised to solve the conventional defects as described above.

In order to solve the above object, the present invention is coupled to the first rotating element rotated by the driving force of the drive source and the clutch structure so that the slip occurs against the overload to the first rotating element to transmit a constant rotational torque to the output side. A second rotating element, an idler arm coupled to be movable up and down in the same axis as the first and second rotating elements, and coupled to a distal end of the idler arm, the first idler arm being moved up and down by the idler arm. And a reel gear unit having an idler for engaging the second rotating element and a smaller gear, and an upper and lower gear for selectively engaging the small gear with the idler according to the up and down movement of the idler arm. And a vertical drive element for moving the idler arm up and down.

The clutch structure may be a friction clutch that combines a first rotating element and a second rotating element with a friction member and a spring.

In addition, the vertical drive element is an elastic member coupled between the cap of the friction clutch and the idler arm to elastically support the idler arm upwards, and a rotation lever for rotating the idler arm downward by rotating by the drive cap on one side of the idler arm. Can be configured.

Hereinafter, an embodiment of the present invention mode converter attached to the drawings will be described in detail as follows.

4 is a longitudinal cross-sectional view showing the configuration of the present invention mode converter, as shown in this, washer 42, gear portion 43a and pulley portion 43b on a shaft 43 'fixed to the base 41; The input gear pulley 43 having a), the friction member 44, the clutch gear 45, the friction member 44 ', the spring 46 is in turn coupled, the cap 47 is coupled to the upper side, The cap 47 comes to the upper side and describes the spring 42 'and the spring 46' so that one end of the idler arm 48 is coupled.

In this structure, the input gear pulley 43 is used as the first rotary element to which the driving force of the driving source is input, and the clutch gear 45 is used as the second rotary element which is slipably coupled thereto, and the friction member as the clutch structure. (44) 44 'and a friction clutch structure by the spring 46 illustrate the form used.

The shaft 49 is fixed to the other end of the idler arm 48, and the shaft 49 has a structure in which a spring 46 ", a washer 42", and an idler 50 are combined.

Upper and lower gears 51a and 51b are formed in the reel gear part 51 that meshes with the idler 50, and the small gear selectively engaged with the reel gear part 51 in the idler 50. 50a and the atmospheric fish 50b are formed.

As an example of the up and down drive element for moving him up and down on the upper side of the idler arm 48, the pivoting lever 60 is coupled to the shaft 60 ', and on one side of the pivoting lever 60 to rotate it. Driving cap 61 is installed.

In addition, a jog clutch 60 is installed at one side of the idler clutch 40, and the jog clutch 60 has a washer 62 and a relay on a shaft 61 fixed to the base 41. A lower gear 63 engaged with the gear 64 is engaged, and a spring 65, an friction member 68, an upper gear 66, and a friction member 68 'engaged with the clutch gear 45 at an upper portion thereof. ) And the cap 67 are combined.

In the present invention as described above, as shown in FIG. 4, the small gear 50a of the idler 50 is engaged with the clutch gear 45 and the upper gear 51a of the reel gear portion 51. In the driving mode is transmitted to the input gear pulley 43 from a separate driving source such as a capstan motor, the mode can be performed in the regeneration mode or reverse regeneration.

When the fast forward mode is to be performed in such a state, the rotation lever 60 is rotated counterclockwise by moving the driving cap 61 moving by the driving force of a driving source such as a loading motor, and the rotation lever 60 is rotated. When rotated counterclockwise, its tip portion moves the idler arm 48 downward, whereby the small gear 50a of the idler 50 coupled to the idler arm 48 moves the upper gear of the reel gear portion 51. 51a and the clutch gear 45, the standby gear 50b of the idler 50 is connected to the lower gear 52b of the reel gear portion 51 and the gear portion 43a of the input gear pulley 43. Since the interlocking operation is completed, the mode conversion is completed, so that the fast forward mode can be performed.

The jog clutch 60 is an upper gear 66 engaged with the clutch gear 45 of the idler clutch 40, and the jog clutch 60 is a clutch gear of the idler clutch 40. The upper gear 66 meshed with the 45 rotates by the rotation of the clutch gear 45, and the lower gear 63 rotates accordingly, and the rotational force of the lower gear 63 causes the relay gear 64 to rotate. It is output to the feed reel table.

Although not shown in the figure, the relay gear 64 is configured to be moved up and down by a separate mechanism may be operated to output a driving force as needed.

According to the present invention as described above, the mode converter mechanism is simple because the idler arm is driven up and down while the reel table is driven by the idler clutch 40 at an appropriate rotational torque. There is an advantage to reduce the cost of the product. In addition, the idler arm 48 moves up and down by the operation of the rotation lever 60 so that the gear bite state of the idler 50 coupled to the end of the idler arm 48 is converted. Since the part is not rotated at high speed, the defects in which the function is deteriorated due to wear can be eliminated, and thus the reliability can be improved.

Claims (3)

A first rotating element that is rotated by a driving force of a driving source and a second rotating element which is coupled in a clutch structure so that slip occurs against an overload on the first rotating element, and transmits a constant rotational torque to an output side; An idler arm coupled up and down to the same axis as the rotating element, coupled to the distal end of the idler arm, which is engaged with the first and second rotating elements in accordance with the up and down movement of the idler arm and its smaller. An idler having a small gear, a reel gear part having upper and lower gears to which the small gear and the standby gear are selectively engaged according to the up and down movement of the idler arm, and an up and down driving element for moving the idler arm up and down. Mode conversion apparatus of the magnetic recording player, characterized in that configured to include. 2. The mode converter of claim 1, wherein the clutch structure is a friction clutch in which a first rotating element and a second rotating element are combined with a friction member and a spring. The idler according to claim 1 or 2, wherein the upper and lower driving elements are coupled between the cap of the friction clutch and the idler arm to elastically support the idler arm upward, and rotate by the drive cam on one side of the idler arm. And a rotation lever for moving the arm downward.