JPH026525Y2 - - Google Patents

Description

[Detailed description of the invention] In this invention, when a tape cassette is inserted in the longitudinal direction with the tape surface facing the side, the cassette holder automatically moves from the reset position to the set position, starts playing, and then stops. This relates to a cassette tape recorder in which when the operating member is pushed in and the cassette holder is moved in the reset direction, the motor automatically stops and the tape cassette is pushed back in the ejecting direction. The present invention relates to a cassette tape recorder that is compact and simple.

Generally, this type of tape recorder is constructed such that the magnetic head moves toward and away from the cassette holder in conjunction with a stop operation member.

For this reason, conventional tape recorders have the following drawbacks. In other words, when the operating member is pushed in, the magnetic head moves in conjunction with the operating member to separate from the cassette holder, the cassette holder then moves to the reset position, and the tape cassette in the holder is further pushed out in the ejecting direction. However, at this time, if you accidentally pull back the operating member before removing the cassette from the holder, the magnetic head will move towards the cassette holder again in conjunction with this operating member, and the head surface will touch the holder or cassette case. There was a risk that the cartridge would hit the wrong position and be damaged, or the holder or cassette case could be destroyed.
Also, if the operating member is pulled back by mistake after the cassette has been removed from the holder by the stop operation, the head surface may come into contact with an incorrect position in the holder, or the cassette may enter the cassette insertion path in the holder and the cassette may be removed. If the cassette is forced into the magnetic head, the magnetic head may be pushed against the cassette case, causing it to tilt or be damaged. Therefore,
In order to eliminate such problems,
As shown in Publication No. 24915, when the operating member is pushed in to move the cassette holder from the set position to the reset position, there is a mechanism that mechanically locks the operating member in the pushed position in relation to the position of the cassette holder. A device with a coupling mechanism is being considered. However, devices having such an engagement mechanism have a problem that the structure of the engagement mechanism is complicated, which not only increases cost but also increases the overall size.

The present invention has been devised based on the above circumstances, and its purpose is to provide a cassette type tape recorder of the type described above in which erroneous operation of the stop operation member can be reliably prevented with a simple structure.

Hereinafter, the configuration of the present invention will be explained based on illustrated embodiments. Fig. 1 is a plan view showing the mechanical parts of a cassette tape recorder, Fig. 2 is a left side view of the same, and Fig. 3 is a right side view of the same. The head support member, 4 is a locking member, 5 is an interlocking member, and 6 is a stop operation member.

A reel shaft 7, a capstan shaft 8, and a motor 9 for rotationally driving these are mounted on the upper surface side of the fixed substrate 1.

The cassette holder 2 has a flat plate shape and is disposed on the upper surface side of the fixed substrate 1, and one end of the cassette holder 2 is pivoted to the edge on the hand side of the fixed substrate 1 as shown in FIGS. 4a and 4b.
The set position (lowering position) and the fixed board 1 in close contact with
It is rotatable between the reset position (raised position) and the remote position. The left and right ends and the front end of this cassette holder 2 are raised upward to form left and right side walls 10, 11 and a blocking wall 12, respectively, and the tape cassette 13 is held from the hand side, and with the tape surface facing right, the left and right side walls 10 are raised. , 11 can be inserted horizontally. One end of a leaf spring 2a that presses the tape cassette 13 from above is fixed to the blocking wall 12. Further, this cassette holder 2 has an opening 14 in the center, and cutouts 15 and 16 extending from the bottom plate to the side wall 11 on the right side. 15 so that the capstan shafts 8 are inserted into the tape cassettes 13 in the cassette holder 2, respectively. and cassette holder 2
By rotating the tape cassette 13 from the set position to the reset position, the tape cassette 13 is removed from the reel shaft 7 and capstan shaft 8.

The head support member 3 has a flat plate shape, and is attached to the back side of the fixed base plate 1 so as to be slidable in the left and right directions, as shown in FIG. 5, and is always biased leftward by a tension spring 17. This head support member 3 has a magnetic head 18 mounted on its upper surface, and the magnetic head 18 is positioned on the upper surface side of the fixed substrate 1 to the right of the notch 16 on the hand side of the cassette holder 2.

Further, a magnetic head 18 is mounted on the upper surface of the fixed substrate 1.
A pinch arm 19 is rotatably supported via a support shaft 20 at a forward position. This pinch arm 19 has a pinch roller 21 attached to its rotating end, and the pinch roller 21 is positioned to the right of the notch 15 at the front. The pinch roller 21 elastically contacts a part of the head support member 3 and moves the pinch roller 21 to the capstan shaft 8 following the leftward movement of the head support member 3.
Press it against the

The lower end of the locking member 4 is attached to the fixed base plate 1 at a position below the rotating end of the cassette holder 2, as shown in FIG. . Further, as shown in Figure b, a short locking piece 23 and a tall cassette push-out piece 24 are arranged side by side on the left and right, and a spring hanging piece 25 extending leftward is provided at the upper end of the push-out piece 24. . When this locking member 4 rotates in the cassette removal direction, the locking piece 23 moves to the lower surface side of the cassette holder 2 to prohibit rotation of the cassette holder 2 in the setting direction, and the push-out piece 24 The tape cassette 13 inside the cassette holder 2 is pushed back in the ejecting direction. Conversely, when the push-out piece 24 is pushed by the tape cassette 13 inserted into the holder 2, the locking piece 23 comes off from the lower surface of the cassette holder 2. Note that there is a push-out piece 2 at the rotating end of the cassette holder 2.
A recess 2b is formed opposite to 4 (see FIG. 1).

The interlocking member 5 is formed of one plate material,
As shown in FIG. 2, it is rotatably attached to the left side wall 10 of the fixed board 1, and one end is locked to the left edge of the rotating end of the cassette holder 2, so that it rotates in conjunction with the cassette holder 2. It's becoming like that. Also,
This interlocking member 5 is provided with a bifurcated leg 26 extending downward from the center of rotation and a spring hanging piece 5a extending obliquely upward, and between the front and rear legs 26a, 26b of the bifurcated leg 26, A pressing protrusion 6a formed on the operating member 6 is engaged as appropriate.

Each end 27a, 27b of a tension coil spring 27 is locked to each spring hook 25, 5a of the locking member 4 and interlocking member 5, as shown in FIG.
The spring 27 provides a rotational force to the interlocking member 5 to urge the cassette holder 2 toward the set position, and also provides a rotational force to the locking member 4 in the tape cassette removal direction.

As shown in FIG. 5, the stop operation member 6 is attached to the back side of the fixed base plate 1 so as to be slidable in the front and rear directions.
This operation member 6 has its left side edge raised upward to form a press operation section 28, and the press protrusion 6a is positioned in front of the operation section 28. Further, an inclined edge 29 is provided on the right side edge of the operating member 6 and is inclined leftward toward the front. It is pressed into contact. Therefore, the operating member 6 is always pushed by the inclined edge 29 from the right side and urged toward the user's hand. When the operating member 6 is on the hand side, the roller 30 hits the front end of the inclined edge 29 and the head supporting member 3 moves to the leftmost side, moving the magnetic head 18 towards the notch 1.
6 and inserted into the cassette holder 2. In this state, the pinch roller 21 is also inserted into the cassette holder 2 through the notch 15,
It is pressed against the capstan shaft 8 by a spring 22. Further, when the pressing operation part 28 of the operating member 6 is pushed forward, the pressing protrusion 6a enters between the front and rear legs 26a and 26b of the bifurcated leg part 26 of the interlocking member 5 and pushes the front leg part 26a. , the interlocking member 5 is rotated. As the operating member 6 moves forward, the inclined edge 29 pushes the roller 30, moving the head support member 3 rightward and removing the magnetic head 18 from the notch 16. Also,
The pinch roller 21 is also pushed back by the head support member 3 and leaves the notch 15. On the other hand, when the operating member 6 is pushed forward, the interlocking member 5 rotates and the front and rear legs 26a, 26b of the bifurcated leg 26 press the pressing protrusion 6a.
When the cassette holder 2 is locked in the reset position, the operating member 6 is prohibited from returning to the hand side by its rear leg portion 26b. Therefore, even if you accidentally try to pull back the operating member 6 toward your hand when the cassette holder 2 is in the reset position, the locking member 4 prevents the cassette holder 2 from rotating toward the set position. Therefore, this operating member 6
cannot be pulled back. Further, a normally closed power switch (not shown) is arranged in front of the operating member 6, and when the operating member 6 is pushed forward, the switch is turned off to stop the motor 9 and place the tape recorder in playback mode. The mode is switched from to stop mode.

Next, the operation of this tape recorder will be explained.

First, the operation member 6 moves forward, the cassette holder 2 is locked at the reset position, and the magnetic head 18 and the pinch roller 21 are removed from the cassette holder 2, as shown in FIGS. 1 to 3 and 4. When the tape cassette 13 is horizontally inserted into the cassette holder 2 with the tape surface facing right in the stopped state shown in FIG. 12, the tip of the locking piece 23 comes off the bottom surface of the holder 2, the interlocking member 5 and the holder 2 are rotated by the spring 27, and the cassette 13 in the holder 2 is moved to the reel shaft 7 as shown in FIG. 4a. and attach it to the capstan shaft 8. Further, the interlocking member 5 releases the engagement with the operating member 6 (the state of engagement between the rear leg portion 26b of the bifurcated leg portion 26 and the pressing protrusion 6a of the operating member 6). As a result, the operating member 6 is initially pushed back toward the hand side by the elasticity of the springs 27 and 17, and after the pressing protrusion 6a is separated from the bifurcated leg 26, the spring 27 is exclusively applied to the inclined edge 20 of the roller 30. It returns to the hand side due to the pressing force against it. Then, in conjunction with the return operation of the operating member 6, the head support member 3 moves to the left, bringing the magnetic head 18 into contact with the magnetic tape in the cassette 13, and the pinch roller 21 is attached to the capstan shaft 8 via the magnetic tape. Pressure contact.
Further, as the operating member 6 returns, the motor 9 is started, the reel shaft 7 and the capstan shaft 8 are rotated, and the reproducing operation is started.

Next, to stop the tape recorder during the playback operation or after all the tape has been wound, the operation member 6 can be pressed. That is, when the operating member 6 is pushed forward in the state shown in FIG. The tape is removed from the tape cassette 13. When the operating member 6 is further pushed forward, the interlocking member 5 is pushed around by the pressing protrusion 6a, and the cassette holder 2 is rotated toward the reset position, the power switch is turned off, and the motor 9 is stopped. Then, by rotating the cassette holder 2 in the direction of the reset position, the cassette 13 is separated from the reel shaft 7 and the capstan shaft 8, and then the front edge of the holder 2 is disengaged from the locking piece 23 of the locking member 4, and the member 4 is rotated in the cassette ejecting direction by the elasticity of the spring 27, and the cassette pushing piece 24 pushes back the cassette 13 in the ejecting direction while the tip of the locking piece 23 is locked to the lower surface side of the holder 2.

As described above based on the embodiments, according to the tape recorder of the present invention, the interlocking member 5 and the operating member 6 are provided, and when the operating member 6 is pushed in, the interlocking member 5 is rotated by the pushing force. An engagement mechanism for rotating the cassette holder 2 from the set position to the reset position and holding the operating member 6 in the push-in position is provided on the interlocking member 5 in parallel with the direction of movement of the operating member 6. It is composed of an engaging portion consisting of two leg portions 26a and 26b, and a pressing protrusion 6a as an engaged portion provided on the operating member 6 and engaging with the engaging portion. When the cassette holder 2 is in the set position, the leg portion 26a provided at the front with respect to the advancing direction of the pressing protrusion 6a is attached to the pressing protrusion. 6a, and the other leg 26b is located away from the line of motion of the pressing protrusion 6a, and when the cassette holder 2 is in the reset position, the other leg 26b follows the movement of the pressing protrusion 6a. Pressing protrusion 6a on the line
The pressing protrusion 6a is disposed at a position where it engages with the pressing protrusion 6a and prevents the pressing protrusion 6a from returning. Therefore, as long as the cassette holder 2 is locked at the reset position by the locking member 4, the operating member 6 cannot be moved back (pull back), and the extremely simple structure prevents erroneous operation of the operating member 6. can be reliably prevented. Further, since the engagement mechanism is constituted by the legs 26a and 26b extending in a bifurcated shape from the interlocking member 5 and the pressing protrusion 6a that engages with these in the above-mentioned relationship,
In particular, the interlocking member 5 and the legs 26a, 26b are
It is now possible to form one piece from two sheets of plate material,
As a result, it is possible not only to simplify the engagement mechanism, but also to downsize the engagement mechanism and, by extension, downsize the entire engagement mechanism.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a plan view showing the mechanical part of a cassette tape recorder, Fig. 2 is a left side view of the same, Fig. 3 is a right side view of the same, and Fig. 4 Figures a and b are side sectional views showing the relationship between the fixed board and the cassette holder, Figure 5 is a plan view showing the relationship between the fixed board, the operating member, and the head support member, and Figure 6 a is the fixed board and the locking member. Figure b is a front view of the same. 2...Cassette holder, 4...Locking member, 5
... Interlocking member, 6 ... Operation member, 6a ... Pressing protrusion, 7 ... Reel shaft, 13 ... Tape cassette,
18...magnetic head, 26...bifurcated leg.

Claims (1)

[Scope of utility model registration request] A state in which a substrate 1, a reel shaft 7 rotatably provided on the substrate 1, and a tape cassette 13 rotatably attached to the substrate 1 and inserted in a direction perpendicular to the rotation axis center line are held. a cassette holder 2 which is rotatably attached to the base plate 1 and capable of selecting a set position in which the cassette 13 is mounted on the reel shaft 7 and a reset position in which the cassette 13 is detached from the reel shaft 7; When the cassette holder 2 rotates to the reset position, it rotates in a direction to push back the tape cassette 13 inside the holder 2 while locking the cassette holder 2 at the reset position, and the tape cassette 13 inserted into the cassette holder 2 is rotated. a locking member 4 which rotates in a direction to detach from the cassette holder 2 when pushed by the cassette holder 2; The cassette holder 2 of the tape cassette 13 is placed on the other end side.
Two legs 26 arranged side by side in the direction of insertion and removal into the
A bifurcated engaging portion 2 formed by a and 26b
6 and an interlocking member 5 which supports a magnetic head 18 and is reciprocably provided to move the magnetic head 18 toward and away from the tape in the tape cassette 13 held in the cassette holder 2. a spring member 17 that constantly biases the head support member 3 in the direction of advancing the magnetic head 18 toward the tape cassette 13 in the cassette holder 2; The leg portions 26a, 2 constituting the 26
The cassette holder 2 has a pressing protrusion 6a that can be inserted between the cassette holder 6b and a cam portion 29 on the side surface that selectively moves the head support member 3 back against the restoring force of the spring member 17. It is provided so as to be movable in a direction perpendicular to the rotational axis and along the substrate 1, and when the cassette holder 2 is pushed in at the set position, the cam portion 29 supports the head support member 3. Following the retraction, the pressing protrusion 6a forms the two leg portions 26a and 26b that constitute the engaging portion 26.
After rotating the interlocking member 5 to rotate the cassette holder 2 in the reset direction by pressing the leg portion 26a located at the front with respect to the advancing direction of the pressing protrusion 6a, the pressing is performed. Projection 6
a is engaged with the leg portion 26b located at the rear and held in the push-in position, and when the interlocking member 5 rotates in conjunction with the rotation of the cassette holder 2 from the reset position to the set position, the cassette holder 2 is moved to the rear position. After the pushing position holding state by the leg portions 26b is released and the restoring force of the spring member 17 applied via the cam portion 29 starts the return operation to the non-pushing position, the movement of the cam portion 29 is interlocked. A cassette type tape recorder comprising an eject operation member 6 for moving the head support member 3 forward.