JPH054322U - Tape recorder - Google Patents

Abstract

(57) [Summary] [Purpose] A tape recorder with a simple structure that does not operate the automatic stop mechanism that automatically stops the tape running when the end of the tape is reached in the playback mode in the temporary stop mode. To provide. [Structure] The rotational force of a motor is transmitted to a rotating body (constant speed feed reel gear) 25 for tape running drive via a friction transmission mechanism, and a cam mechanism (eccentric cam, pressing protrusion) 3 is also provided.
4, 42 are provided to rotate together with the rotating body 25,
The transmission of the rotational force from the motor to the rotating body 25 is cut off during the temporary stop operation for running the tape.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention detects the end of a tape that is driven to run and releases the tape running mode A simple configuration that prevents the automatic stop mechanism from working when the tape is temporarily stopped. Tape recorder.

[0002]

[Prior art]

  The so-called self-tapping that releases the tape running mode by detecting the end of the running tape. Conventionally, tape recorders equipped with a motion stop mechanism have been used exclusively for tape running systems. It is configured to detect the pulling tension and operate the stop mechanism.

[0003]   However, with such conventional tape tension detection system, tension is applied to the running tape. Since the force detection member is pressed into contact and the change in tension is detected, it is possible It cannot be denied that the desired tension is applied. As a result, tape running is unstable And there is a problem that the tape is easily damaged.

[0004]   In order to deal with such a problem, the tape that is driven by the tape that is being driven is completed. Automatic stop machine that detects the rotation stop of the winding shaft and releases the tape running mode A tape recorder equipped with a structure has been developed.

[0005]   This type of tape recorder is generally a cam that is driven to rotate when the tape is running. The mechanism is engaged with the cam mechanism and is displaced by the rotation of the cam mechanism to cause the tape running mode. Automatic stop mechanism to release the card, and the automatic stop mechanism only when the tape winding shaft rotates. A non-engagement state holding member for holding the cam mechanism in the non-engagement state with respect to the cam mechanism. Composed.

[0006]   According to the device thus configured, the rotation of the tape winding shaft is prevented when the tape is running. When stopped, the non-engagement state of the automatic stop mechanism and the cam mechanism by the non-engagement state holding member Since the state holding action is lost, the automatic stop mechanism is accompanied by the rotation of the cam mechanism. Is activated, which releases the tape running mode.

[0007]   Incidentally, a tape recorder is often provided with a temporary stop mechanism. This species When the tape constant speed running mode is set, The tape running is temporarily stopped while holding the tape.

[0008]   However, if the tape recorder incorporates the above-mentioned automatic stop mechanism, When the automatic stop mechanism operates, whether the automatic stop mechanism described above stops the rotation of the tape winding shaft. However, there is a problem that this is erroneously detected as the end of the tape.

[0009]   To solve such a problem, for example, Japanese Utility Model Publication No. 56-6048 According to the report, when a pause operation is performed, even if the rotation of the tape winding shaft stops, the cam machine In order to prevent the structure from engaging with the automatic stop mechanism, for example, a spring is used to prevent the automatic stop machine. It is disclosed that the engaging member with the cam mechanism of the structure is biased to the non-engaging position.   However, when such a configuration is adopted, the biasing of the engaging member using the spring described above is used. It is necessary to control the gas in accordance with the temporary stop operation, which complicates the configuration. Cannot be denied.

[0010]

[Problems to be solved by the device]

  In this way, in the past, the automatic stop device in the tape recorder was used to run the tape at a constant speed. To make it work only on line, and not on pause, It was undeniable that it would complicate the overall configuration of the tape recorder.

[0011]   The present invention has been made in consideration of such circumstances, and its purpose is to Stops the operation of the tape recorder by detecting the end of the tape only when the tape is running at a constant speed. It is to provide a tape recorder having a simple structure that can be surely performed.

[Means for Solving the Problems]

  In order to achieve the above-mentioned object, the present invention provides a cam mechanism that is rotationally driven when the tape is running. When the tape travels in the tape running mode, the cam mechanism is engaged with the cam mechanism and is displaced by the rotation of the cam mechanism. Release the automatic stop mechanism and the automatic stop mechanism only when the tape take-up shaft rotates. And a non-engaged state holding member for holding the cam mechanism in a non-engaged state. In the precoder,   The torque of the motor is transmitted to the rotating body for tape running drive through the friction transmission mechanism. At the same time, the cam mechanism is provided so as to rotate together with the rotating body, and the tape runs. The transmission of the rotational force from the motor to the rotating body is interrupted during the temporary stop operation for The feature is that it is turned off.

[0012]

[Action]

  With such a structure, the cam mechanism rotates together with the rotating body for driving the tape running. The rotation of the rotating body can be stopped by a temporary stop operation. If the tape running is temporarily interrupted, the cam will stop when the rotating body stops rotating. The rotation of the mechanism also stops.

[0013]   As a result, a temporary stop operation is performed when the tape is running, and the tape take-up shaft stops rotating. However, since the rotation of the cam mechanism itself that activates the automatic stop mechanism also stops, The automatic stop mechanism does not malfunction during the stop operation.

[0014]

【Example】

  An embodiment of the present invention will be described below with reference to the drawings.

[0015]   FIG. 1 is a plan view of the tape recorder according to the present invention in a stopped state, and FIG. 2 is a reproduction state thereof. It is a top view.

[0016]   In both figures, 10 is a tape recorder substrate (hereinafter, simply referred to as a substrate), which is provided on the lower surface thereof. Record, play, rewind, fast forward, stop, and play in sequence from left to right. Each of the operating members 11, 12, 13, 14, 15, 16 of the (temporary stop) is an arrow. It is arranged so as to be reciprocally movable in the directions A and B.

[0017]   These operation members 11 to 16 are moved in the direction of arrow A by a return spring (not shown). The elastic restoring force of is added. Replace each of these operating members 11 to 16 with the return spring. By pushing in the direction of arrow B against the elastic return force, recording, playback, winding Rewind, fast forward, stop, and pause modes are set.

[0018]   On the other hand, the locking member 17 is arranged directly on the substrate 10 in the moving direction of the operation members 11 to 16. They are mounted so as to reciprocate in the intersecting direction, that is, in the directions of arrows C and D. This locking part The material 17 has an inclined surface 18 and a locking step portion 19 on one end side (the left end side in the drawing) and the other. The engaging piece 20 is provided on the end side (the right end side in the drawing).

[0019]   In the reproduction operation member 12 that is pushed in, the locking piece 21 of the playback operation member 12 is tilted. By engaging with the locking step portion 19 via the inclined surface 18 in a detachable manner, the pushing position It is locked at the (playback position).

[0020]   The locking member 17 is biased in the returning direction (arrow C direction) by a return spring (not shown). Has been done.

[0021]   On the upper surface of the substrate 10, a reel shaft (tape winding shaft) 22 on the winding side and a rewinding side The reel shaft 23 and the reel shaft 23 are rotatably arranged. At the lower end of the take-up reel shaft 22 As shown in the cross-sectional structure in Fig. 4, high-speed feed (fast-forward and rewind mode A reel gear (rapid feed gear) 24 for fast feed) is provided so as to rotate coaxially and integrally. ing.

[0022]   That is, the spindle 50 protruding from the substrate 10 is provided with a high-speed feed reel having a central tube portion. Lugear 24 is rotatably fitted. On this high speed reel gear 24 A friction transmission member 51 made of felt or the like is provided on the surface. This friction transmission On the upper surface of the high-speed feed reel gear 24 with the member 51 interposed therebetween, the high-speed feed reel is provided. The constant speed feed reel gear (rotating body) 25 is freely rotatable by being fitted in the central tubular portion of the gear 24. It is provided in.

[0023]   The winding reel shaft 22 described above is the center tube of the high-speed feed reel gear 24. It is fitted and integrated into the upper end of the part. In addition, on the lower surface of the take-up reel shaft 22 A coil spring 53 is incorporated in the provided hole portion, and by the coil spring 53, The constant-speed reel gear 25 transfers the high-speed reel gear 2 via the friction transmission member 51. It is pressed against the upper surface of No. 4.

[0024]   Therefore, the constant speed feed reel gear 25 and the high speed feed reel gear 24 are not The rotation is transmitted via the member 51, and the friction transmission mechanism 51a is configured here.

[0025]   A rotation transmission gear 32, which will be described later, is constantly meshed with the constant speed feed reel gear 25. ing. The high speed feed reel gear 24 is rotatably supported by the substrate 10. The high speed rotating gear 26 is always meshed.

[0026]   An intermediate gear 27 meshes with the high-speed rotation gear 26 in a disengageable manner. This intermediate gear 2 The reference numeral 7 designates a rotation axis rotatably supported on the substrate 10 in the directions of arrows E and F about a shaft 28. It is rotatably supported by the arm 29.

[0027]   When the fast-forward operation member 14 is pushed in the direction of arrow B, the rotating arm is moved. By rotating 29 in the direction of arrow E from the neutral position shown in FIG. Meshes with the high speed rotation gear 26.

[0028]   When the rewinding operation member 13 is pushed in the direction of arrow B, the rotating arm is By rotating 29 in the direction of arrow F from the neutral position shown in FIG. Is a high-speed feed reel provided on the lower end of the rewind-side reel shaft 23 so as to rotate integrally with the same. It engages with the gear wheel 30 so as to engage and disengage freely.

[0029]   When not in the fast forward or rewind mode, the rotating arm 29 is at the neutral position. It

[0030]   On the other hand, the rotary shaft 27a of the intermediate gear 27 is composed of a pulley, an endless belt, etc. not shown. Is connected to the rotary shaft of the motor via a power transmission system consisting of The gear 27 rotates. This power transmission system is a drive system that does not show the rotational force of the motor. It is a separate system from the power transmission system that transmits to Pushtan.

[0031]   A small diameter gear 31 is integrally rotatably provided at the center of the upper surface of the intermediate gear 27. There is.

[0032]   A rotation transmission gear 32 is disengageably engaged with the small diameter gear 31. Rotation transmission The yarn 32 is mounted rotatably in the directions of arrows G and H around the take-up reel shaft 22. The gear plate 33 is rotatably supported on the upper surface on one end side.

[0033]   Then, when the reproduction operation member 12 is pushed in the direction of the arrow B, in relation to this, the illustration is made. The head mounting plate (not shown) reaches the playback position. With this head mounting plate The gear plate 33 is pressed and rotated in the direction of arrow G, and the rotation transmission gear 32 becomes a small diameter gear. It is designed to mesh with 31.

[0034]   That is, when the reproduction operation member 12 is pushed in, a small The rotation of the radial gear 31 is transmitted from the rotation transmission gear 32 to the constant speed feed gear 25, The rotation of the constant-speed feed reel gear 25 of FIG. The reel shaft 22 is rotated by being transmitted to the reel gear 24.

[0035]   In addition, when the fast-forwarding operation member 14 is pushed in, the The rotation of the intermediate gear 27 is transmitted to the high-speed feed reel gear 24 via the high-speed rotation gear 26. The reel shaft 22 on the take-up side is rotated.

[0036]   In the reproduction mode in which the rotation transmission gear 32 meshes with the small diameter gear 31, the pause operation is performed. The pose mode was set by pushing the work member 16 into the pose position. At this time, the tip portion 16a of the pose operating member 16 pushes the other end portion 33a of the gear plate 33. By applying pressure, the gear plate 33 rotates counterclockwise in FIG. The rotation transmission gear 32 is separated from the small diameter gear 31 as shown in FIG. .

[0037]   On the other hand, an eccentric cam having an outer peripheral surface as a cam surface is provided on the upper surface of the constant-speed feed reel gear 25. A (cam mechanism) 34 is integrally rotatably provided. This constant speed reel gear 25, that is, the reel stand also serves as the cam gear. On the cam surface of the eccentric cam 34, The cam slidable contact portion of the control member 35 slidably contacts and separates. Also, on this cam surface, A pressing protrusion (cam mechanism) 42 described below is provided.

[0038]   The control member 35 is mounted on the substrate 10 so as to be swingable about a shaft 36. This The one end side of the control member 35 is branched into a bifurcated shape and protrudes from the lower surface of the tip of the one side piece. The pin 37 provided serves as the cam sliding contact portion and the contact portion that contacts the pressing protrusion 42. There is.

[0039]   The engaging projection 38 provided on the lower surface of the other end of the control member 35 has the above-mentioned engaging portion. The material 17 is brought into contact with and engages with the edge portion on one side of the distal end of the engaging piece portion 20 of the material 17 so as to be freely separable.

[0040]   The pin 37, which is the cam sliding contact portion of the control member 35, is attached to the cam surface of the eccentric cam 34. During the sliding contact, the rotation of the constant-speed feed reel gear 25 in the counterclockwise direction is prevented. The control member 35 rotates counterclockwise about the shaft 36 by the action of the eccentric cam 34 that rotates integrally with the control member 35. Receive a biasing effect.

[0041]   It is located above the eccentric cam 34 and is kept in the disengaged state with respect to the winding reel shaft 22. A holding member 39 is provided. The non-engagement state holding member 39 is a C-shaped fitting portion 4 A pressing piece 41 is provided so as to protrude in the radial direction substantially at the center of the outer periphery of 0. And the fitting part 40 is frictionally fitted to the outer circumference of the take-up reel shaft 22. Rotation detecting member 39 When the take-up reel shaft 22 is rotating counterclockwise, the pressing piece 41 Is pressed against the control member 35 by pressing the other side piece of the control member 35. Then, a clockwise urging force is applied. Due to this biasing force, the eccentric cam 34 The engagement between the pin 37 and the pressing protrusion 42 is avoided.

[0042]   The biasing force of the non-engaged state holding member 39 and the biasing of the eccentric cam 34 As a result, the control member 35 moves around the shaft 36 as the winding-side reel shaft 22 rotates. Rock.

[0043]   When the rotation of the take-up reel shaft 22 is stopped, the rotation detection member 39 Since the turning force in the clockwise direction is not applied to the control member 35, this control The member 35 has a pin 37, which is a cam sliding contact portion, for winding the cam surface of the eccentric cam 34. It is left at the position farthest from the center of the side reel shaft 22.

[0044]   At the position where the pin 37 on the upper surface of the constant-speed feed reel gear 25 is left behind, A pressing protrusion (cam mechanism) 42 that abuts 37 is provided in a protruding manner.

[0045]   Then, with the pressing protrusion 42 in contact with the pin 37 of the control member 35, The feed reel gear 25 continues to rotate in the counterclockwise direction, whereby the control member 3 5 rotates counterclockwise to move the locking member 17 against the urging force of the return spring by the arrow. It moves back in the D direction.

[0046]   Next, the operation of the tape recorder automatic stop device configured as described above will be described with reference to FIGS. This will be described using 5.

[0047]   In the stop state shown in FIG. 1, the reproduction operation member 12 is pushed in the direction of arrow B. Then, the locking piece 21 is engaged with the locking step 19 via the inclined surface 18 of the locking member 17. By fitting, the playback operation member 12 is locked at the push-in position (playback position). Be done. As the reproduction operation member 12 is locked in the pushing position, the reproduction operation is performed. The head mounting plate (not shown) moves in the direction of arrow B in conjunction with the member 12 to reach the playback position. Reach

[0048]   Also, as this head mounting plate reaches the playback position, it will continue to be connected to this head mounting plate. When the gear plate 33 moves in the direction of arrow G, the rotation transmission gear 32 moves to the small diameter gear. 31 is engaged, the motor is energized, and as shown in FIG. 2 and FIG. It becomes raw mode.

[0049]   In such a reproduction mode, the rotation of the motor is the small-diameter gear 31, the rotation transmission gear 3 2, through the constant speed feed reel gear 25 and the friction transmission member 51 in this order, the winding side It is transmitted to the reel shaft 22. Then, it is wound together with the constant-speed feed reel gear 25. The take-up reel shaft 22 rotates counterclockwise at a constant speed. This allows the rewind side The tape is run at a constant speed from the reel shaft 23 side to the take-up reel shaft 22 side for reproduction operation. The work is done.

[0050]   Further, in such a reproduction mode, it is integrally rotated with the constant speed feed reel gear 25. The control member 35 moves the shaft 36 by the action of the rotating eccentric cam 34 and the disengaged state holding member 39. It swings around the center.

[0051]   For this reason, the constant-speed feed reel gear 25 is attached to the pin 37, which is the contact portion of the control member 35. Since the pressing protrusion 42 that rotates integrally with the contact member 1 does not come into contact, the locking member 1 of the reproduction operation member 12 The lock in the pushing position by 7 is not released.

[0052]   In this playback mode, all the tape has been wound up on the winding side reel shaft 22 side. At that time, that is, when the end of the tape is reached, the take-up reel shaft 22 stops The reel reel gear 25 is provided with the friction transmission member 51 with respect to the high speed reel reel 24. It becomes a slip state through. As a result, the take-up reel shaft 22 has stopped rotating. In this state, only the constant speed feed reel gear 25 rotates.

[0053]   Then, the clockwise direction with respect to the control member 35 by the disengaged state holding member 39 The urging force to the direction is no longer applied. Therefore, the pin 37 of the control member 35 is The eccentric cam 34 slides into contact with the farthest position from the center of the reel shaft 22 on the winding side. The oscillating motion stops at a certain position and then stops at that position, resulting in the state shown in FIG. 4 (B). .

[0054]   After this state, the constant-speed feed reel gear 25 further rotates counterclockwise. As a result, as shown by the solid line in FIG. Abut 37.

[0055]   Even after this contact, the constant-speed feed reel gear 25 further rotates counterclockwise. This causes the control member 35 to rotate counterclockwise about the shaft 36, A state in which the locking member 17 moves in the direction of the arrow D along with, and is shown by a chain double-dashed line in FIG. Becomes

[0056]   As a result, from the locking step portion 19 of the locking member 17 to the locking piece 21 of the reproduction operation member 12. When the reproduction operation member 12 is released, the reproduction operation member 12 is biased by the return spring. Then, the actuator moves back in the direction of arrow A to be in the state shown by the chain double-dashed line in FIG.

[0057]   As the reproduction operation member 12 is returned, the head mounting plate, the locking member 17, and the gear When the rate 33 etc. is returned to the initial position shown in Fig. 1, the tape recorder functions automatically. Stop at.

[0058]   By the way, in the playback state shown in FIG. 2, the pause operation member 16 is moved in the direction of arrow B. When the pushing operation is performed, the gear play is performed by the tip portion 16a of the pause operation member 16. The other end 33a of the boot 33 is pressed. For this reason, when the gear plate 33 is reversed in FIG. The rotation transmission gear 32 separates from the small-diameter gear 31 by rotating in the counterclockwise direction.

[0059]   Then, the rotational force of the motor is not transmitted to the reel gear 25 for constant speed feed, As a result, the rotation of the constant-speed feed reel gear 25 and the reel shaft 22 is stopped, The driving is stopped, and the temporary stop state shown in FIG. 3 is entered.

[0060]   In this temporary stop state, the reel gear 25 for constant speed feeding, that is, the cam gear Since the rotation is stopped, the above-mentioned automatic stop mechanism does not operate.

[0061]   Then, in the pause state shown in FIG. 3, the pause operation member 16 in the direction of arrow B When the pushing operation to the direction is released, the gear plate 33 moves clockwise in FIG. Upon rotation return, the rotation transmission gear 32 meshes with the small diameter gear 31, and again shown in FIG. Playback state.

[0062]   Further, in the stopped state shown in FIG. 1, the fast-forward operation member 14 is pushed in the direction of arrow B. When the push-in operation is performed, the rotating arm 29 is rotated in the clockwise direction in association with this, and the intermediate The gear 27 meshes with the high-speed rotation gear 26, and the motor is energized, so It becomes a card.

[0063]   In such a fast-forward mode, the motor is rotated by the intermediate gear 27 and the high-speed rotation gear. The reel 26, the high-speed feed reel gear 24, and the friction transmission member 51 are sequentially passed through the winding device. It is transmitted to the rear reel shaft 22. And with this high speed reel gear 24 The take-up reel shaft 22 rotates at high speed.

[0064]   As a result, the tape is fed from the rewind side reel shaft 23 side to the take-up reel shaft 22 side. The high-speed operation is performed at high speed.

[0065]   Further, in the stopped state shown in FIG. 1, the rewinding operation member 13 is pushed in the direction of arrow B. When the squeezing operation is performed, the rotating arm 29 is rotated in the counterclockwise direction in association with this, The intermediate gear 27 meshes with the high speed feed reel gear 30 of the rewind side reel shaft 23. At the same time, the motor is energized to enter the rewind mode.

[0066]   In such a rewind mode, the rotation of the motor is controlled by the intermediate gear and the high-speed feed reel. It is transmitted to the rewind-side reel shaft 23 via the reel gear 30. And this fast The rewind-side reel shaft 23 rotates at high speed together with the feed reel gear 30.

[0067]   As a result, the tape is wound from the take-up reel shaft 22 side to the rewind side reel shaft 23 side. The high-speed traveling of the pump is performed and the rewinding operation is performed.

[0068]   The present invention is not limited to the above embodiment. In the above example, A cam mechanism consisting of the core cam 34 and the pressing projection 42 is attached to the constant-speed feed reel gear 25. Although it is physically provided, it is realized as another rotating body that rotates in association with the reel gear 25. It is also possible. Further, the reel gear 24 for high speed feeding and the reel shaft 2 on the winding side It is also possible to connect 2 and 2 via a friction transmission mechanism that has an appropriate friction force. Is.

[0069]   Further, the rotational force of the motor is controlled by the constant speed feed reel gear 25 and the high speed feed reel gear 2. The configuration of the rotation transmission mechanism that selectively transmits the transmission power to the vehicle 4 can be modified in various ways.

[0070]   In short, the present invention can be variously modified and implemented without departing from the gist thereof. You can

[0071]

[Effect of device]

  As described above, according to the present invention, when the temporary stop mode is set, the automatic stop operation is performed. Since the rotation of the cam gear to stop it will stop, do not automatically stop in the pause mode. In order to prevent this, the spring that was conventionally provided is no longer necessary, and the number of parts is reduced accordingly. Fewer and easier to configure.

[0072]   Furthermore, if the cam gear is also used as a reel stand, In comparison, the number of parts can be reduced, the configuration is simple, and the installation space is also reduced. It is possible to reduce the number, which is convenient for making the planar shape of the tape recorder compact.

[Brief description of drawings]

FIG. 1 is a plan view showing a stopped state of a tape recorder provided with an automatic stop device according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a reproducing state of the tape recorder.

FIG. 3 is a plan view showing a paused state of the tape recorder.

FIG. 4 is an operation explanatory view of the automatic stop device of the tape recorder.

FIG. 5 is a view showing a cross-sectional structure of a winding shaft portion of the tape recorder.

[Explanation of symbols]

16 Pause operation member 22 Reel side reel shaft (tape winding shaft) 25 Constant speed reel gear (rotating body) 39 Non-engaged state holding member 42 Pressing protrusion (cam mechanism) 51a Friction transmission mechanism

Claims (2)

[Scope of utility model registration request] 1. A cam mechanism that is driven to rotate when a tape is running, an automatic stop mechanism that engages with the cam mechanism and is displaced by rotation of the cam mechanism to release the running mode of the tape, and a tape winding shaft. In a tape recorder provided with a non-engagement state holding member which holds the automatic stop mechanism in a non-engagement state with respect to the cam mechanism only at the time of rotation, the rotational force of the motor is used to drive the tape running through the friction transmission mechanism. And the cam mechanism is provided so as to rotate together with the rotating body, and the transmission of the rotational force from the motor to the rotating body is interrupted during a temporary stop operation for tape running. A tape recorder characterized by. 2. The tape recorder according to claim 1, wherein the cam mechanism is provided integrally with the rotating body.