KR19980077146A - Reel Table Brake Device for Tape Recorder - Google Patents

Abstract

The present invention relates to a reel table brake apparatus of a tape recorder for applying braking torque to a reel table provided on a deck of a tape recorder. According to another aspect of the present invention, a reel table brake device of a tape recorder includes a braking torque smaller than a revolving torque of a reel table, through a band member wound around an outer periphery of the reel table and connected to a tension arm at one end thereof and connected to a tension arm or deck. Since the brake torque is larger than that of the reel table, it is configured to provide all the braking torques, so the structure is simplified, contributing to the reduction of the parts cost and the improvement of productivity.

Description

Reel Table Brake Device for Tape Recorder

The present invention relates to a reel table brake device for applying braking torque to a reel table of a tape recorder.

The deck of the tape recorder is rotatably provided with a reel table coupled to the tape reel to rotate the tape reel of the tape cassette seated on the deck, and a reel for applying braking torque to the reel table around the reel table. A table brake device is provided.

Conventionally, a reel table brake apparatus generally includes a tension arm 20 and a reel table 10 mounted on a deck 1 so as to be rotatable about a hinge shaft 25. Wrapped around the outer periphery, both ends of the band member 30 connected to the tension arm 20, and the deck member 1 is installed rotatably around the hinge shaft 45, the end of the lever member coupled to the friction member 50 ( 40). The tension arm 20 is elastically biased in the direction in which the band member 30 is in close contact with the reel table 10 by the tension coil spring 29, and the lever member 40 is rubbed by the tension coil spring 49. The member 50 is elastically biased in the direction away from the reel table 10. Deck 1, the slide member 60 receives the rotational force of the loading motor 90 through the worm 91, the worm gear 92, the connecting gear 93 and the gear 65, arrows (A, It is installed to reciprocate in the direction of B).

In the state where the tension arm 20 is positioned as shown in solid line in FIG. 1, the band member 30 is in contact with the reel table 10 with an appropriate contact force, and the band member 30 is in contact with the reel table 10. By friction, the band member 30 applies an appropriate braking torque of a size smaller than the rotational torque when the reel table 10 rotates. By applying an appropriate braking torque to the reel table 10 as described above, the tape released from the tape reel of the tape cassette coupled to the reel table 10 in the play mode of the tape recorder is released while maintaining the appropriate tension. On the other hand, the tension arm 20 can be rotated to a position as shown in the virtual line in Figure 1 in conjunction with the movement of the slide member (60). When the tension arm 20 is rotated to the position as shown by the imaginary line, the band member 30 connected to both ends of the tension arm 20 is separated from the outer circumferential surface of the reel table 10 and thus the reel table ( 10) is not subjected to braking by the band member (30).

In the stop mode of the tape recorder, the reel table 10 rotated is stopped by the lever member 40 and the friction member 50. That is, when the slide member 60 is moved in the direction of the arrow A by the loading motor 90, and the contact protrusion 41 of the lever member 40 is pressed by the cam part 61 of the slide member 60. The lever member 40 is rotated in the direction of an arrow C so that the friction member 50 is pressed against the reel table 10 as shown in FIG. 2. When the friction member 50 is compressed to the reel table 10 in this manner, the braking torque greater than the rotational torque of the reel table 10 is reeled by the friction force between the reel table 10 and the friction member 50. The reel table 10 is stopped by being applied to the table.

However, in the conventional reel table brake apparatus as described above, since the members for applying a braking torque smaller than the rotational torque of the reel table and the members for applying a braking torque greater than the rotational torque of the reel table are separately provided, There is a problem that the structure for braking the table is complicated and the number of parts is increased.

The present invention has been made to solve this problem, the structure for applying the braking torque to the reel table is improved by a simple configuration, the braking torque smaller than the revolving torque of the reel table and the braking torque greater than the revolving torque of the reel table It is an object of the present invention to provide a reel table brake device of a tape recorder that can be applied.

1 is a schematic plan view of a main portion of a tape recorder employing a conventional reel table brake device;

FIG. 2 is a schematic plan view of a state in which the reel table is braked by the lever member of FIG. 1;

3 is a schematic plan view of main parts of a tape recorder employing a reel table brake device according to the present invention;

FIG. 4 is a view showing a state in which the tension arm of FIG. 3 is rotated to a second rotation position;

FIG. 5 is a view showing a state where the tension arm of FIG. 3 is rotated to a third rotational position. FIG.

Explanation of symbols for main parts of the drawings

1 ... deck 10 ... reel table

30 Band member 120 Tension arm

121 ... first contact protrusion 122 ... second contact protrusion

129.Tension coil spring 160 ... Slide member

161 ... the 1st cam face 162 ... the 2nd cam face

163 ... the third cam

In order to achieve the above object, a reel table brake apparatus of a tape recorder according to the present invention is for braking a reel table installed on a deck of a tape recorder and coupled to a tape reel of a tape cassette; A tension arm which is rotatably installed on the deck, a band member disposed to surround the outer circumference of the reel table, one end of which is connected to the tension arm, and the other end of which is connected to any one of the tension arm and the deck, and the tension arm. Arm rotating means for rotating so as to be selectively positioned at the first rotating position, the second rotating position, and the third rotating position; The band member is spaced apart from the reel table when the tension arm is positioned in the first pivot position, and the band member is in contact with the reel table when the tension arm is positioned in the second pivot position. A braking torque smaller than the rotational torque is applied to the reel table, and when the tension arm is positioned in the third rotational position, the band member is pressed against the rally table to apply a braking torque greater than the rotational torque of the reel table to the reel table. It is characterized by the fact that it is configured to apply.

In the present invention, the arm rotation means is provided with a slide member having a first cam surface, a second cam surface and a third cam surface that is installed to be reciprocally movable on the deck and selectively contact the tension arm according to the movement position. To; The tension arm is located in the first pivot position when in contact with the first cam surface, in the second pivot position when in contact with the second cam surface, and in contact with the third cam surface. It is preferably configured to be located in the rotational position. At this time, the tension arm is elastically in close contact with the first cam surface when the tension arm is positioned at the first pivot position, and the tension arm is positioned at the second rotation position when the tension arm is positioned at the second pivot position. It is preferable to further include elastic means for elastically closely contacting the cam surface.

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

Fig. 3 is a schematic plan view of a main portion of the tape recorder employing the reel table brake device according to the present invention, showing a state in which the tension arm is located at the first rotational position. 4 and 5 are views illustrating a state in which the tension arm of FIG. 3 is rotated to the second rotation position and the third rotation position, respectively. 3 to 5, members or portions having the same reference numerals as the members or portions illustrated in FIGS. 1 and 2 perform the same or similar functions, and detailed descriptions thereof will be omitted.

3 to 5, a reel table brake apparatus according to the present invention is provided around the reel table 10 on the deck 1 of the tape recorder.

The reel table brake device includes a tension arm 120, a band member 30, and arm rotation means.

The tension arm 120 is rotatably installed on the deck 1 about the hinge shaft 125. The band member 30 is disposed to surround the outer circumference of the reel table 10, and both ends thereof are connected to the tension arm 120. The arm rotating means rotates the tension arm 120 so that the tension arm 120 is selectively positioned at the first rotational position, the second rotational position, and the third rotational position. 1) a slide member 160 having a first cam surface 161, a second cam surface 162, and a third cam surface 163, which are installed to be reciprocally movable and selectively contact the tension arm 120 according to the movement position thereof. And the compression coil spring 129 is provided.

As shown in FIG. 1, when the tension arm 120 comes into contact with the first cam surface 161, that is, the first contact protrusion 121 is formed to protrude toward the slide member 160 on the tension arm 120. When in contact with the first cam surface 161, the tension arm 120 is located in the first pivot position. At this time, both ends of the first contact protrusion 121 of the tension arm 120 are elastically supported on the first cam surface 161 by the tension coil spring 129 supported by the tension arm 120 and the deck 1, respectively. Will come into contact. Then, when the tension arm 120 is in contact with the second cam surface 162, that is, when the first contact protrusion 121 of the tension arm 120 is in contact with the second cam surface 162. 120 is located in the second pivot position as shown by the solid line in FIG. At this time, the first contact protrusion 121 of the tension arm 120 is in elastic contact with the first cam surface 161 by the tension coil spring 129. When the tension arm 120 is in contact with the third cam surface 163, in the present embodiment, the second contact protrusion 122 is formed on the tension arm 120 to protrude toward the slide member 160. When in contact with the cam surface 163, the tension arm 120 is located in the third pivot position as shown by the solid line in FIG.

On the other hand, when the tension arm 120 is positioned in the first rotational position, the band member 30 has an appropriate size having both ends interposed between the reel table 10 by the tension arm 120 on the first rotational position. Pulled by force, the reel table 10 is brought into contact with an appropriate contact pressure. When the reel table 10 rotates in such a state, friction force of a predetermined size is generated between the inner circumferential surface of the band member 120 and the outer circumferential surface of the reel table 10, and the reel table 10 is driven by the friction force. An appropriate braking torque of a smaller size than the rotational torque of the reel table 10 is applied.

The reel table 10 is rotated in the direction of the arrow R1 from the state in which the tension arm is positioned in the first rotational position as shown by the solid line in FIG. 3 and the imaginary line in FIG. 4 and shown by the solid line in FIG. 4. 2), the external force that is pulling both ends of the band member 30 is removed when the second member is positioned in the second rotational position adjacent to the reel table 10. Off). In this state, no braking torque is applied by the band member 30 when the reel table 10 rotates.

With the tension arm 120 positioned in the first pivot position as shown by the solid line in FIG. 3 and the phantom line in FIG. 5, in a direction away from the reel table 10 as shown by the arrow R2. In the state of being rotated and positioned in the third rotational position as shown by the solid line in FIG. 5, a greater tensile force is applied to the band member 30 through both ends connected to the tension arm 120. Accordingly, the band member 30 is pressed against the reel table 10 more strongly than when the tension arm 120 is in the first rotational position, and the braking torque is greater than the rotation torque of the reel table 10. It is added to (10).

In the reel table brake apparatus of the tape recorder thus constructed, for example, in the play mode of the tape recorder, the tension arm 120 is positioned at the first rotational position as shown in FIG. Accordingly, the reel table 10 is rotated while receiving the braking torque of the appropriate size by the band member 30 as described above, so that the tape released from the tape reel of the tape cassette coupled to the reel table 10 The proper tension will be released.

If the tension arm 120 is in the first rotational position as shown in FIG. 3, for example, when the fast-winding mode of the tape recorder is performed, the loading motor 90 is operated to warp 91. The slide member 160 is moved in the direction of the arrow A through the worm gear 92, the connecting gear 93, and the gear unit 165. Accordingly, the first contact protrusion 121 is pressed by the inclined portion 164 of the slide member connecting the first cam surface 161 and the second cam surface 162, and in this process, the tension arm 120 is tensioned. The coil spring 129 is rotated in the direction of the arrow R1 while tensioning. As such, the tension arm 120 is rotated in the direction of the arrow R1 so that the first contact protrusion 121 of the tension arm 120 is elastically slid by the tension coil spring 129 as shown in solid line in FIG. 4. When it comes in contact with the second cam surface 162, the tension arm 120 is located in the second rotation position and the operation of the loading motor 90 is stopped. During this process, both ends of the band member 30 connected to the tension arm 120 are loosened from the reel table 10 in accordance with the rotation of the tension arm 120. Therefore, since the friction force does not act between the reel table 10 and the band member 30 when the reel table 10 rotates at a high speed, the brake member 10 does not brake the reel table 10 by the band member 30. Torque is not applied either.

If the tension arm 120 is in the second rotational position as shown in FIG. 4, when the stop mode of the tape recorder is performed, the slide member 160 is moved by the loading motor 90 again to the arrow ( Is moved in the R1) direction. Accordingly, the inclined surface 165 of the slide member 160 presses the second contact protrusion 122 of the tension arm 120 to rotate the tension arm 120 in the direction of the arrow R2. When the movement of the slide member 160 is completed, as shown in the solid line in FIG. 5, as the second contact protrusion 122 contacts the third cam surface 163 of the slide member 160, the tension arm 120 is formed. It is located in the 3rd rotation position. During this process, the band member 30 is applied to both ends of the band member 30 connected to the tension lever 120 more than when the tension lever 120 is in the first rotational position. It is strongly pressed against the reel table 10. Accordingly, the braking torque larger than the rotational torque acts on the reel table 10, so that the rotating band member 120 is stopped.

On the other hand, in the state in which the tension arm 120 is located in the third rotational position as shown by the solid line in FIG. 5, the tension coil spring 129 causes the force in the direction of the arrow R2 to the tension arm 120. Although it is applied, the tension arm 120 is prevented from rotating in the direction of the arrow (R2) by the tensile stress of the band member 30 is subjected to the tensile force.

As described above, in the reel table brake device of the present embodiment, the tension arm 120 is rotated to be selectively positioned at the first pivot position, the second pivot position, and the third pivot position by the movement of the slide member 160, and the reel table The tension of the band member 30 wound on both ends and connected to the tension arm 120 is adjusted by the rotational position of the tension arm 120, so that the desired braking torque is applied to the reel table 10. It is configured to be. Therefore, since there is no need to separately provide the lever member 40, the friction member 50, etc. as described with reference to Figs. 1 and 2, there is a great effect in terms of reducing the parts cost and improving the assembly workability.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to the above embodiments. For example, both ends of the band member 30 should not be connected to the tension arm 120. One end of the band member 30 (the upper end shown in FIG. 3) is the tension arm 120. ) And the other end (end shown above in FIG. 3) is connected to the deck 1, the object of the present invention will be sufficiently achieved. In addition, there may be a variety of structures for causing the tension arm 120 to rotate in conjunction with the movement of the slide member 160, the contact of the cam surface (161, 162, 163) or the tension arm 120 of the slide member 160 The position and shape of the protrusions 121 and 122 may be changed in various forms by those skilled in the art without departing from the technical spirit of the present invention.

As described above, the reel table brake device of the tape recorder according to the present invention is wound around the outer circumference of the reel table, one end of which is connected to the tension arm and the other end of which is connected to the tension arm or the deck through a band member connected to the torque of the reel table. It is configured to provide both smaller braking torque and a larger braking torque than the revolving torque of the reel table, so the structure is simplified, contributing to the reduction of parts cost and improvement of productivity.

Claims (3)

For braking a reel table installed on the deck of the tape recorder and engaged with the tape reel of the tape cassette; A tension arm rotatably installed on the deck, A band member disposed to surround an outer circumference of the reel table, one end of which is connected to the tension arm and the other end of which is connected to any one of the tension arm and the deck; Arm rotating means for rotating the tension arm to be selectively positioned at a first pivot position, a second pivot position, and a third pivot position; When the tension arm is positioned in the first pivot position, the band member contacts the reel table to apply a braking torque to the reel table that is smaller than the rotation torque of the reel table. The band member is spaced apart from the reel table when the tension arm is positioned in the second pivot position, When the tension arm is positioned in the third rotational position, the band member is pressed against the rally table and configured to apply a braking torque to the reel table that is greater than the rotational torque of the reel table. Device. The method of claim 1, The arm rotation means includes a slide member having a first cam surface, a second cam surface, and a third cam surface, which are installed to be reciprocally movable on the deck and selectively contact the tension arm according to the movement position thereof. The tension arm is located in the first pivot position when in contact with the first cam surface, in the second pivot position when in contact with the second cam surface, and in contact with the third cam surface. A reel table brake apparatus for a tape recorder, wherein the reel table is positioned at a rotational position. The method of claim 2, The tension arm is elastically in close contact with the first cam surface when the tension arm is in the first pivot position, and the tension arm is elastically in contact with the second cam surface when the tension arm is in the second pivot position. Reel table brake device of the tape recorder, characterized in that it further comprises an elastic means to be in close contact with.