JPH07105093B2 - Operation mechanism of tape recorder - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an operation mechanism of a tape recorder, and more particularly to an operation mechanism of a tape recorder having a slide type operation member.

(Technical Background of the Invention and Problems Thereof) As an operation mechanism of a tape recorder, one having a slide type operation switch is known. This operation switch is slidably attached to the body of the tape recorder,
It is moved to each mode setting position such as play, stop and recording. Further, this kind of operation mechanism includes a holding means for holding the operation switch at each mode setting position in order to give a click feeling of the operation switch at each mode setting position. As the holding means, for example, a plurality of holes are formed in the operation switch corresponding to each mode setting position, and a ball urged by a leaf spring is engaged with these holes (JP-A-52-40105). ), Or a configuration in which a plurality of grooves are formed in the operation switch and a roller urged by a leaf spring is engaged with these grooves. Usually, at the mode setting position, the recording and reproducing positions are arranged on both sides of the stop with the stop in between. In the case of such an arrangement, in order to reliably set each mode, the operation switch must be securely held in the stop mode setting position.

However, in the conventional operation mechanism, for example, when the leaf spring urging the ball or the roller is weak, the operation switch cannot be reliably held at each mode setting position. Therefore, for example, when the operation switch is moved from the reproduction position to the stop position, there is a risk of jumping over the stop position and moving to the recording position. Also,
In order to prevent the above problem, it is conceivable to increase the biasing force of the leaf spring, but in this case, the holding force at each mode setting position becomes too strong and the operation of the operation switch becomes heavy. Particularly, in the conventional operation mechanism, it is difficult to increase the holding force of the operation switch only at the stop mode setting position because of its configuration.

(Object of the Invention) The present invention has been made in view of the above points, and an object thereof is to reliably set an operating member to a stop mode setting position without causing an erroneous operation such as jumping during operation. It is to provide an operating mechanism of a recorder.

(Summary of the Invention) In order to achieve the above object, an operating mechanism of the present invention has a stop mode setting position and other mode setting positions located on both sides thereof, and is slidably provided for a mode setting operation. A member, a holding means for holding the operating member in the stop mode setting position and another mode setting position, and a pinch roller lever supporting a pinch roller, which is attached to the pinch roller lever when the operating member is in another mode setting position. An urging member that urges the roller lever toward the capstan and an engaging member are provided. The engagement member includes a first position for pressing the biasing member to press the pinch roller against the capstan by the biasing member and permitting the operating member to slide, and an operating member at a stop mode setting position. A second position that engages and prevents movement of the operating member;
Provided movably between a first position and a second position, a neutral position for releasing the pressing of the biasing member to separate the pinch roller from the capstan, and allowing the operation member to slide. The operating member is located at the neutral position while being held at the stop mode setting position by the holding means, and when the operating member slides from the stop mode setting position to another mode setting position, the operating member causes the neutral position. To the first position, and when the operating member slides from another mode setting position to the stop mode setting position, it is temporarily moved to the second position by the biasing member.

According to the above configuration, when the operation member is moved from the other mode setting position to the stop mode setting position, the operation member can surely stop at the stop mode setting position by the action of the engaging member, and an erroneous operation such as jumping can be performed. Can be prevented. Further, since the engaging member is held by using the urging member for urging the pinch roller, it is not necessary to newly provide the urging member, and it is possible to prevent an increase in the number of parts and an increase in manufacturing cost. You can

(Embodiment of the Invention) An embodiment of the present invention will be described in detail below with reference to the drawings.

1 and 2 show a tape recorder provided with an operating mechanism according to an embodiment of the present invention. This tape recorder comprises a base 10, on the upper surface of which a capstan 12, first to third support shafts 14, 15, 16 and support posts 18, guide pins 20, and a pair of guide posts 22 are erected. Has been done. Further, the base 10 has a rectangular opening 24 formed therein. A head lever 28 that supports a magnetic head 26 is rotatably supported on the first support shaft 14. A locking pin 30 is provided on the left end of the head lever, and a pressing pin 31 is provided on the right end of the head lever. As can be seen from FIG. 2, a torsion coil spring 34 is wound around the support pin 32 provided upright on the upper surface of the base 10, and one end of this spring is inserted into a hole 35 formed in the base and the other. The ends are respectively hooked on the locking pins 30 of the head lever. As a result, the head lever 28 is biased counterclockwise around the support shaft 14.

A pinch roller lever 36 having a substantially U-shaped cross section is rotatably supported on the support shaft 15 and positioned above the head lever 28. A pinch roller 38 is rotatably supported by the pinch roller lever 36. Pinch roller lever
36 has an extending portion extending leftward, and the extending end of this extending portion is bent downward to form a bent piece 39. The bent piece 39 projects through the opening 24 to the lower surface side of the substrate 10. On the side surface of the pinch roller lever 36, a pair of long holes 4
0 and 41 are formed and a locking piece 42 is attached. Further, a torsion coil spring 44 as an urging member according to the present invention is wound around the support shaft 15. One end 45 of the spring 44 passes through the long hole 40, and the pinch roller lever
It extends from 36, and the extending end is bent downward. The other end 46 of the spring 44 extends through the long hole 41 and the locking piece 42.

An operation switch 48 as an operation member is slidably attached to the base 10. The operation switch 48 includes an operation plate 54 having an upper plate 50, an intermediate plate 51, a lower plate 52, and a side plate 53 connecting these, and an operation button 55 fitted to the side plate of the operation plate. I have it. An elongated guide hole 56 is formed in the middle plate 51, and the guide pin 20 of the base 10 is inserted into this guide hole.
Thereby, the operation switch 48 is slidably mounted on the base 10, and the lower plate 52 is located on the lower surface side of the base. The middle plate 51 has a protrusion 57 that can come into contact with the locking pin 30 of the head lever 28, and a protrusion 58 that can engage with the other end 46 of the torsion coil spring 44. An end edge of the upper plate 50 on the head lever 28 side forms a guide edge 60 for guiding a guide roller of an engagement lever described later, and a recess 61 is formed at the center of the guide edge. There is. In addition, the side plate 53,
An opening 65 is formed so as to face the operation button 55.

As will be described later, the operation switch 48 is slid between a reproduction mode setting position as another mode setting position, a stop mode setting position, a recording mode setting position as another mode setting position, and a REV mode setting position. It And
The operation button 55 is provided with three engagement grooves 62, 63, 64 formed side by side at a portion facing the opening 65 of the operation plate 54. These engagement grooves are provided at the reproduction mode setting position and the stop mode. It is formed corresponding to the set position and the recording mode set position, respectively. Further, one end of a leaf spring 66 is fixed to the side wall 10a of the base 10, and the leaf spring extends between the upper plate 50 and the middle plate 51 of the operation plate to the vicinity of the opening 65. A roller 67 is rotatably attached to the other end of the leaf spring 66. The roller 67 is biased by the leaf spring and elastically engages with one of the engaging grooves 62, 63, 64 through the opening 65. I am fit. As a result, the operation switch 48 is held at each mode setting position, and the engagement grooves 62,
63, 64, the leaf spring 66 and the roller 67 constitute the holding means in this invention.

An engagement lever 68 as an engagement member is attached to the support shaft 16 of the base 10.
Is rotatably supported, and the upper plate 50 and the middle plate of the operation plate 54
Located between 51 and. On the engagement lever 68, a guide roller 70 that engages with the guide edge 60 of the operation plate 54 is attached. The support shaft 16 has a torsion coil spring 71.
One end of the spring is hooked on the support post 18 of the base 10 and the other end is hooked on the engaging lever 68. As a result, the engagement lever 68 is urged clockwise by the spring 71 about the support shaft 16, and the torsion coil spring 44
Is in contact with one end 45 of the. Note that FIG. 2 shows a stop mode of the tape recorder, and in the stop mode, about half of the guide roller 70 of the engaging lever 68 is located in the recess 61 of the operation plate 54.

Next, the operation of the operation mechanism configured as described above will be described.

First, in the stop mode shown in FIG. 2, the operation switch 48 is in a position where the engagement groove 63 of the operation button 55 engages with the roller 67, and the guide roller 70 of the engagement lever 68 moves into the concave portion of the operation switch 48. It is located half way inside the office 61. In this state, when the operation switch 48 is moved to the reproduction mode setting position or the recording mode setting position, the guide roller 70 can move onto the guide edge 60 of the operation plate 54, and the engagement lever 68 moves. , Which is located at a neutral position where it can be moved to a first position described later.

Further, the protruding portion 57 of the operation switch 48 is in contact with the locking pin 30 of the head lever 28. Thereby, the head lever
28 is rotated clockwise against the urging force of the torsion coil spring 34, and the magnetic head 26 is separated from a magnetic tape (not shown). The pinch roller lever 26 is rotated clockwise around the support shaft 15 by pressing the bent piece 39 thereof against the left end of the head lever 28, and the pinch roller 38 is moved.
Are spaced from the capstan 12.

As shown in FIG. 3, the roller 67 has an engaging groove for the operation button 55.
When the operation switch 48 is moved to the reproduction mode setting position that engages with the 62, the protrusion 57 of the operation switch causes the head lever to
Separated from the locking pin 30 of 28. As a result, the head lever 28 is biased by the torsion coil spring 34 to rotate counterclockwise, and the magnetic head 26 contacts a magnetic tape (not shown). Further, the guide roller 70 of the engaging lever 68 is pressed by the side edge of the upper plate 50 of the operation plate 54 and moves from the recess 61 onto the guide edge 60. As a result, the engagement lever 68 rotates clockwise around the support shaft 16 to the first position shown in the drawing, and presses the one end portion 45 of the torsion coil spring 44. As a result, the engagement lever 68 is pressed against the operation plate 54 by the urging force of the torsion coil spring 44, and is held in the first position. At the same time, the other end 46 of the torsion coil spring 44 is
Is urged counterclockwise around. Then, the other end portion 46 of the torsion coil spring 44 rotates the pinch roller lever 36 counterclockwise. Therefore, the pinch roller 38 comes into contact with the capstan 12, and a predetermined pinch pressure is applied to the pinch roller by the torsion coil spring 44. Thereby, the reproduction mode of the tape recorder is set.

Next, as shown in FIG. 4, when the operation switch 48 is moved from the reproduction mode setting position to the position where the guide pin 20 of the board 10 contacts the right end of the guide hole 56 of the operation switch, the REV mode of the tape recorder is changed. Is set. That is, when the operation switch 48 is moved to the left from the reproduction mode setting position, the roller 67 is disengaged from the engagement groove 62, and the holding force of the operation switch is released. Further, the projection 58 of the operation switch 48 comes into contact with the end portion 46 of the torsion coil spring 44, and deforms the end portion 46 in a direction away from the other end portion 45. As a result, the end portion 46 of the torsion coil spring 44 is separated from the locking piece 42 of the pinch roller lever 36, and the pinch pressure applied to the pinch roller 38 becomes zero. Here, since the end portion 45 of the torsion coil spring 44 abuts the engagement lever 68 and is prevented from moving, a sufficient biasing force is stored at the end portion 46. Therefore, when the operation force applied to the operation switch 48 is released, the operation switch is urged by the end portion 46 to move to the reproduction mode setting position, and the pinch roller lever 36 moves through the locking piece 42. Is biased by the end portion 46. As a result, the pinch roller 38 is pressed against the capstan 12 again. In this way, when the operation force of the operation switch 48 is released, the reproduction mode is automatically set.

On the other hand, when the operation switch 48 is moved from the reproduction mode setting position to the stop mode setting position shown in FIG. 2, the guide roller 70 of the engagement lever 68 causes the operation plate 54 to move when the operation switch reaches the stop mode setting position. It comes off from the guide edge 60 and faces the recess 61 of the operation plate. As a result, the engagement lever 68 is released from being held by the torsion coil spring 44 and the operation switch 48, and can be rotated counterclockwise around the support shaft 16. At the same time, since the engaging lever 68 is biased toward the operation plate 54 by the torsion coil spring 44, the biasing force of this spring 44 causes the engaging lever 68 to contact the bottom of the recess 61 with the guide roller 70. It is once rotated to the position 2. In the second position, the guide roller 70
Is almost entirely housed in the recess 61 of the operation switch 48.
Therefore, the operation switch 48 is prevented from moving by the guide roller 70, and is reliably stopped at the stop mode setting position.

After that, the engagement lever 68 is rotated clockwise around the support shaft 16 by the urging force of the torsion coil spring 71, and is moved to the neutral position shown in FIG. As described above, in this neutral position, about half of the guide roller 70 of the engaging lever 68 is located in the recess 61 of the operation switch 48. Therefore, the engagement lever 68 can move to the first position that allows the movement of the operation switch in response to the movement of the operation switch.

As shown in FIG. 5, when the operation switch 48 is moved from the above-mentioned stop mode setting position to the recording mode setting position where the roller 67 engages with the engagement groove 64 of the operation button 55, the protruding portion 57 of the operation switch is It is separated from the locking pin 30 of the head lever 28. As a result, the head lever 28 is biased by the torsion coil spring 34 to rotate counterclockwise, and the magnetic head 26 contacts the magnetic tape. Further, the guide roller 70 of the engaging lever 68 is pressed by the side edge of the upper plate 50 of the operation plate 54 and moves from the recess 61 onto the guide edge 60. As a result, the engagement lever 68 rotates clockwise around the support shaft 16 to the first position to press the one end portion 45 of the torsion coil spring 44, and as a result, the other end portion 46 of the torsion coil spring 44. Is urged counterclockwise about the support shaft 16. Then, the other end 46 of the torsion coil spring 44 presses the locking piece 42 of the pinch roller lever 36 to rotate the pinch roller lever 36 counterclockwise. Therefore, the pinch roller 38 contacts the capstan 12, and the torsion coil spring 44 applies the pinch pressure to set the recording mode.

According to the operation mechanism of the tape recorder configured as described above, the following operational effects can be obtained.

That is, the operation switch 48 is held at the stop mode setting position, the reproduction mode setting position, and the recording mode setting position by the holding means. In addition to this holding means, when the operation switch 48 is moved to the stop mode setting position,
The engagement lever 68 is pressed by the torsion coil spring 44 and once rotated to the second position, and the guide roller 70 is positioned in the recess 61 of the operation switch. Therefore, the operation switch
The guide roller is prevented from moving by the guide roller, and is reliably held at the stop mode setting position without jumping over the stop mode setting position. Therefore, according to this operation mechanism, another operation mode is not set by mistake,
It is possible to reliably prevent erroneous operation.

Further, since the torsion coil spring 44 for urging the pinch roller lever 36 is also used as the urging member for urging the engaging lever 68, it is not necessary to provide a new urging member, and the number of parts increases and It is possible to prevent the tape recorder from increasing in size.

The present invention is not limited to the above-described embodiments, but can be variously modified within the scope of the present invention. For example,
Although the combination of the engagement groove, the roller and the leaf spring is used as the holding means, the invention is not limited to this, and the combination of the hole, the ball and the leaf spring may be used.

(Effects of the Invention) As described in detail above, according to the operating mechanism of the present invention, when the operating member is slid from the other mode setting position to the stop mode setting position, the operating member is reliably set to the stop mode setting position. It can be stopped and held, and erroneous operations such as jumping can be prevented. Further, since the operating member is held by using the biasing member for biasing the pinch roller, it is not necessary to provide a new biasing member, and it is possible to prevent an increase in the number of parts and an increase in manufacturing cost. it can.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a main part of a tape recorder equipped with an operating mechanism according to an embodiment of the present invention, and FIG. 2 is a plan view of the tape recorder in a stop mode.
FIG. 3 is a plan view of the tape recorder in the reproduction mode, FIG. 4 is a plan view of the tape recorder in the REV mode, and FIG. 5 is a plan view of the tape recorder in the recording mode. 10 …… Base, 12 …… Capstan, 26 …… Magnetic head,
28 …… Head lever, 38 …… Pinch roller, 38 …… Pinch roller, 44 …… Torsion coil spring, 48 …… Operation switch, 60 …… Guide edge, 61 …… Recess, 62,63,64… … Engagement groove, 66 …… Leaf spring, 67 …… Roller, 68 …… Engagement lever, 70 …… Guide roller.

Claims (1)

[Claims] 1. An operation member for mode setting, which is slidably provided and has a stop mode setting position and other mode setting positions located on both sides of the stop mode setting position; A holding member for holding the pinch roller at the mode setting position and a biasing member attached to the pinch roller lever supporting the pinch roller and biasing the pinch roller lever toward the capstan when the operation member is located at another mode setting position. A first position for pressing the biasing member to press the pinch roller against the capstan by the biasing member and allowing the operating member to slide, and engaging the operating member in the stop mode setting position. The pinch roller is released from the capstan by releasing the pressing force of the biasing member which is located between the first position and the second position where the operation member is prevented from moving. A neutral position for allowing the operating member to slide and allowing the operating member to slide, and an engaging member movably provided to the operating member, wherein the operating member is held at the stop mode setting position by the holding means. While in the neutral position, when the operating member slides from the stop mode setting position to another mode setting position, the operating member moves from the neutral position to the first position and the operating member sets another mode. An operating mechanism of a tape recorder, which is temporarily moved to a second position by an urging member when sliding from the position to the stop mode setting position.