KR800001426Y1 - Tape playing machine with movable head mount - Google Patents

Abstract

No content.

Description

Magnetic recording and reproducing device

1 is a perspective view of one embodiment of a device according to the present invention.

2 is a plan view showing only the head substrate 41 of FIG.

3 is a cross-sectional view taken along the line III-III of FIG.

4 is an enlarged cross-sectional view of a portion cut along the line IV-IV of FIG.

5 is an enlarged cross-sectional view of a portion cut along the line V-V in FIG.

Fig. 6 is a plan view showing the head substrate 41 and the previous day's mechanism of force in the direction of movement thereof.

7 is a plan view showing a rocky mechanism formed of a stop lever, a regeneration lever, a recording lever and a lock plate.

The present invention relates to a magnetic recording and reproducing apparatus, and more particularly, to improving the driving mechanism of the head substrate. In the magnetic recording and reproducing apparatus, for example, in the cassette type, the head is moved forward and backward with respect to the magnetic tape sent from the tape cassette mounted so as to advance and retract the head substrate on which the magnetic head and the erasing head for recording and reproduction are mounted. Is doing. In this case, it is necessary to operate the operating force for moving the head substrate to be almost at the center of the head substrate and to apply a force of a different direction component than the moving direction. This is because the force in the direction different from the moving direction not only causes wear of the guide and the like, but also changes the contact relation between the head and the tape, especially in the forward position, and thus changes the recording and reproduction characteristics.

In general, however, the head substrate is advanced in reproduction and recording, and retracted in other cases, i.e., during fast delivery (F.F.) and rewind (REW). Therefore, it is necessary to have a structure that advances when the play button and the record button are pressed. However, as described above, since the point of action of the force applied to the head board and its direction are limited, most conventional ones advance the head board only when the play button is operated. It is a configuration that must be operated. For this reason, the convenience in use is impaired. For convenience, some types of recording can be operated only by the recording button. Of these types, the side-by-side arrangement of the record button and the play button is a cause of malfunction, and it is not desirable to release these two buttons due to the above limitations, which makes the mechanism complicated and difficult to miniaturize. There is a problem. Therefore, the present invention aims to provide a magnetic recording and reproducing apparatus which improves the driving mechanism of the head board to obtain the degree of freedom of the action point of the force applied to the head board, thereby realizing the ease of design, the simplicity of the mechanism, and the possibility of miniaturization. Doing. Hereinafter, an embodiment of a cassette-type magnetic recording and reproducing apparatus according to the present invention will be described with reference to the accompanying drawings.

In FIG. 1, the chassis plate 11 formed of a metal plate or the like is provided with two reel shafts 12 and a capstan 13, and positioning pins 14 for positioning the tape cassette to be mounted. The tape cassette is mounted by the positioning pins 14 so that the horizontal and vertical positions of the tape cassette (the tape cassette is horizontally mounted in FIG. 1) are mounted, and the reel shafts 12 are lower than the reel of the tape cassette. To accept. One end of the chassis 11 is provided with five push buttons 15-19, which are supported on a shaft 25 by rotating material.

These push buttons 15-19 are for designating the respective operating mode of the tape recorder, press button 15 for stop button, press button 16 for F.F. The button and the press button 17 are used together with the play button, the press button 18 with the REW button, and the press button 19 with the recording button. Each of the push buttons is adapted to engage the levers 20-24 and to move the levers of the push buttons and to operate each of them according to the push button operation. When the playback button 17 or the recording button 19 is pressed, the recording playback head 31 is moved in the direction of advancing the tape (the direction indicated by the arrow A in FIG. 1). In this way, the recording / playback head 31 is supported to be advanced or retracted (opposite to the arrow A) with respect to the tape.

This recording and playback head 31 has two screws (one not shown in Fig. 1) in the head assembly 32 formed of a synthetic resin such as two head protectors 33, a tape guide 34, and an arm axis 36 of the erasing head 35. 38) is mounted on the head substrate 41 by 38. The head substrate 41 is mounted so as to be able to move freely in the direction of arrow A in FIG. The coil spring 42 is for knitting the head board 41 to the pressing button 15-19 side (the direction opposite to arrow A).

Here, the two protective holders 33 are installed with the recording and playback head 31 sandwiched therebetween, and if the tape cassette is accidentally loaded and lowered when the head 31 is moving forward, the tape cassette reaches the tip of the protective holder 33, The tape cassette mounted so as not to touch the head 31 prevents the recording and playback head from being shocked or applied to change the position of the traveling tape. The member which has various functions of the locking function of the head protection prop 33, the tape guide 34, the arm 36 of the arm 39 of the erasing head 35, and the coil spring 37 which biases the arm 39 of this erasing head is integrally formed by synthetic resin such as plastic. It is composed. Therefore, it should be noted that the assembly of the various members is completed only by attaching the integrally mounted head mounting body 32 to the head substrate 41.

The pinch roller 26, which is held freely in rotation, is a mechanism (not shown) that can rotate in response to the advance or retreat of the head board 41, and the pinch roller 26 is pressed against the capstan 13 when the head board 41 is advanced. It is.

The head substrate 41 is formed of sheet metal or the like as shown in FIG. 1 or 2, and is shown in FIGS. 2 and 3 so as to move freely in the direction of arrows A of FIGS. 1 and 2 with respect to the chassis 11. Has guides 51, 52, 53 as shown. These guides 51, 52, and 53 have balls 54, 55, 56, such as metal balls, as shown in Fig. 3, and the balls are sandwiched between the chassis 11 and the head board 41, and the head is placed on the chassis 11 above. The substrate 41 is held in parallel as if floating, and free mobility in a predetermined direction is obtained. Each of the guides 51-53 has a structure as shown in FIGS. 4 and 5. That is, the head substrate 41 is formed with an elongate protrusion (parallel when viewed from the top of the head substrate 41) 61 parallel to the arrow A direction by a hole punching or the like. When viewed from the lower surface of the head substrate 41, an elongated convex portion 62 is formed. Seems to be. In the chassis 11, elongated protrusions 63 and 64 (as seen from the top of the substrate 11) are formed in parallel with two rows parallel to the direction of arrow A. This processing is performed by, for example, a hole punching process or the like. In this way, the elongate convex portions 65 are formed in the middle by the two elongated protrusions 63 and 64. The thin elongated concave portion 62 formed on the lower surface of the head substrate 41 and the elongated concave portion 64 formed on the upper surface of the chassis plate 11 are matched, and a rotatable metal hole 55 is disposed in the center. In this way, the head substrate 41 is supported in a floating form on the chassis 11 freely moving in the direction of arrow A or vice versa. Three guides 51, 52 and 53 are provided to support the plane of the head substrate 41 relative to the chassis 11 by three points. In addition, for guide 53, only one protrusion is formed on the chassis 11 (see Fig. 3). Since the plane is defined at three supporting points, there must be three metal holes to define the plane of the head substrate 41. At least two guides 51 and 52 are sufficient to define the direction of movement (arrow A direction). In the case of one guide, the twisting of the head substrate 41 occurs. Accordingly, the guide 53 only serves to support the metal hole 56 to define the plane of the head substrate 41 and does not have to function as a guide for regulating in the direction of the arrow A. For this reason, one projection is provided on the chassis 11. As a result, there is an operational advantage that can avoid the necessity of precisely aligning the degree of position alignment at the time of machining the recessed portion to the recessed portion provided on the chassis plate 11 and the head substrate 41.

In this way, the head board 41 held in parallel while holding a constant distance with respect to the chassis plate 11 falls off in the direction of falling (upward) only by the above configuration. Therefore, this is prevented by the plate screw 43 fixed at both ends of the chassis. In other words, the head substrate 41 is pressed by the metal hole 44 on one side (upper side) and supported by three metal holes 54-56 on the other side (lower side), and the upper and lower surfaces thereof are supported by four metal holes in total. It is sandwiched in the top 11 of the chassis. Long grooves 45 formed on the head substrate 41 which support the metal holes 44 parallel to the arrow A direction to prevent the escape of the metal holes 44 pressed upwards and smooth the movement of the head substrate 41 in the direction of the arrow (and vice versa). It is.

The head substrate 41 is knitted in the opposite direction to the arrow A in FIG. 6 by the coil spring 42, and is in the position shown by the dashed line in FIG. The head substrate 41 has a limiting spring 72 formed of a bent spring bounded at its center at the point 73, and the ends of the limiting spring 72 are locked at the locking sections 74 and 75, respectively. The limiting spring 72 is centered around the point 73, and energy is accumulated as the tip portion is biased in the direction of arrow B, respectively, thus pressing the locking portions 74 and 75 in the direction of arrow B, respectively. In this way, the limiting spring 72 is retained on the head substrate 41 by engaging the point 73 and the locking portions 74 and 75. The point portion 73 and the locking portions 74 and 75 are formed by projections provided on the head substrate 41, and are formed by pulling a part of the head substrate 41 made of sheet metal, for example.

The head substrate 41 is configured to move forward (in the direction of arrow 6 in Fig. 6) when the playback button 17 or the recording button 19 is operated. That is, as shown in detail in FIGS. 6 and 7, when the play button 17 is operated, the play lever 22 proceeds in the opposite direction to the arrow E in FIG. When the record button 19 is pressed, the record lever 24 proceeds in the direction opposite to the arrow E direction in FIG. Therefore, when any one button is operated, the operating portion 82 or 84 of the playback lever 22 or the recording lever 24 proceeds in the direction of the arrow C (see FIG. 6).

As described above, when the regeneration lever 22 or the recording lever 24 proceeds and the operating portion 82 or 84 moves in the direction of the arrow C, the head portion 41 is pressed as a result of pressing the tip portion of the restrictive spring 72 and pressing the branch 73 through the restrictive spring 72. It moves from the position shown by the dotted line in FIG. 6 to the solid line position in the direction of the arrow. In this way, the head board 41 hits the stopper 71 and stops. The stopper 71 is formed on one side of the positioning pin 14. In this way, when the movement of the head substrate 41 is stopped, pressing the pressing button 16 or 19 again, each of the operating parts 82 or 84 is pressed again in the direction of the arrow C. At this time, the head substrate 41 can no longer move in the direction of the arrow A. Therefore, the distal end of the limiting spring 72 is displaced in the direction of the arrow C by the operating part 82 or 84, i.e., against the accumulated elastic knitting force (indicated by arrow B), and the distal end is disengaged from the locking part 74 or 75. Will be done. In this way, the limiting spring 72 acts as a buffering absorber of the rest of the operating force when the limiting action, that is, when the operation force is applied again after the head substrate 41 reaches a predetermined position. In this case, since the point 73 of the limiting spring 72 is almost at the center of the head substrate 41, the force received at any position, for example from the center 82 or 84 at an off-center position, is always transmitted to the center. Therefore, since the head board 41 receives no component of the force deviating from the arrow A direction, the movement of the head board 41 is smooth, and there is little wear or agitation. For this reason, since the positions of the levers 22 and 24 and the actuators 82 and 84 can be freely designed, a design having improved space efficiency is possible.

Therefore, the above structure is extremely simple and is particularly suitable for a miniaturized cassette type magnetic recording and reproducing apparatus. It should also be noted that recording is enabled by only the recording button 19.

When pressing the record button 17 or the play button 19 to operate the record lever 24 or the play lever 22 to move the head board 41, the play lever 22 or the record lever 24 is locked and the head board 41 is held at a predetermined position. However, this lock mechanism will be described in detail again with reference to FIG. The recording lever 24 and the reproduction lever 22 are arranged in the direction of the arrow E by a predetermined unmarked screw or the like, but the lock plate 89 is disposed at right angles to the levers 22 and 24 so as to be in contact with the levers 22 and 24.

The lock plate 89 has lock pieces 92 and 94, and the lock pieces 92 and 94 protrude to the lower side (rear side of the ground in FIG. 7). The actuating portion 82 of the regeneration lever 22 and the actuating portion 84 of the recording lever 24 respectively protrude above, that is, on the surface axis of the ground in FIG. The lock piece 92 slides along the inclined portion 221 when the regenerating lever 22, which is engaged with the inclined portion 221 provided on the regenerative lever 22, is operated in a direction opposite to the arrow E direction. The arrow moves in the opposite direction to the D direction.

The lock plate 89 is knitted by a predetermined screw or the like not shown in the direction of the arrow D. Therefore, the lock piece 92 sliding and moving on the inclined portion 221 is finally inserted into the fitting portion 222, which is the recess portion provided in the regeneration lever 22. Similarly with respect to the recording lever 24, the lock piece 94 provided on the lock plate 89 is adapted to slide along the inclined portion 241 of the recording lever 24 and to fit into the fitting portion 242 which is formed by the concave portion. In this way, the lock pieces 92 or 94 are fitted to the fitting portions 222 or 242 of the levers, respectively, so that the levers 22 and 24 are locked without turning in the direction of the arrow E, respectively. A sliding part 90 is provided at one end of the lock plate 89. This sliding portion 90 is adapted to slide with the inclined portion 201 of the stop lever 20, which in FIG. 7 protrudes to the rear of the paper surface and is arranged on a plane parallel to the lock plate 89. Therefore, in order to release the state of the lock described above, the stop lever is moved in the direction opposite to the direction of arrow E, and the lock plate 89 is moved in the direction opposite to the direction of arrow E due to the sliding of the inclined portion 201 and the sliding portion 90 of the lock plate. Then, the lock pieces 92 and 94 and the joining portions 222 and 242 are loosened, and as a result, the regeneration lever 22 or the recording lever 24 arranged in the direction of the arrow E is returned to its original state.

According to the present invention as described above with reference to the drawings, the drive mechanism of the head substrate is improved, so the simplicity of the mechanism and the freedom of design are realized.

Claims (1)

On a plane parallel to the chassis plate 11, the head spring 41 is freely supported in a predetermined direction, and the restrictive spring inserted into the point portion 73 provided in the substantially central portion of the head substrate 41 ( 72), and transfers the operation force applied to the predetermined end of the restriction spring 72 to the point portion 73 via the restriction spring 72 to move the head substrate 41 in a predetermined direction. Magnetic recording and playback device.