JPH0218899Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a full-movement operating range regulating switch that operates using a full-movement drive source and is suitable for use in equipment equipped with an electric circuit.

2. Description of the Related Art A sound reproduction device is known that reproduces sound and the like using a full-length dance as a driving source. In this case, the Zenbu is used as a rotational drive source for the recording disk. On the other hand, the electric circuit is turned on and off, specifically, the power source is turned on and off by operating a power switch.

Problems to be Solved by the Invention When using the above-mentioned audio playback device, it is necessary to wind up the entire winding, turn on the power switch, and turn off the power switch after the playback operation is finished. be.

When the above-mentioned audio playback device is incorporated into a toy, although it is possible to reliably wind up the entire dance before playback and turn on the power switch, it is easy to forget to turn off the power switch after playback has finished, and the power battery may run out quickly. There is a problem with putting it away.

Means for Solving the Problems This invention focuses on the fact that the winding shaft of the Zenmai rotates in forward and reverse directions, and the power switch is automatically turned off when the Zenmai reaches the release end. be.

On the other hand, when using Zenmai as a driving source, Zenmai's releasing power is utilized, but this releasing power cannot utilize all of Zenmai's stored power.

Therefore, the present invention combines a member that regulates the operating range of the Zenmai and a power switch, and includes a rotating body that rotates forward and backward when the Zenmai is hoisted and released; is in sliding contact with the end face of
a stopper displaceable in the same direction as the rotating body rotates; a regulating means for regulating the displacement range of the stopper; and a stopper integrated with the stopper when the stopper is positioned at least at a fully released end position. a switch that is turned off by a switch portion of the rotary body; an engaging portion is provided on the end face of the rotary body for forcibly moving the stopper; , elastic arms are provided to prevent displacement of the stopper, and the elastic arms maintain the stopper in the switched-on state at a position immediately before the end of the full release, and the engaging portion forcibly moves the stopper to the full release end position. This switch is characterized in that it displaces the rotating body to the position and presses it against the regulating means to stop the rotating body and turn off the switch.

Effect: When the fully wound winding is released, the switch remains on. This state is maintained by the elastic arm of the stopper preventing displacement of the stopper. When the full dance is released just before the end,
The engaging portion of the rotating body forcibly pushes the stopper against the elasticity of the elastic arm to a position where its displacement is regulated. At this position, the switch is turned off and the release force of the whole dance is also restricted. At this time, Zenmai still has stored power, but in order to extract an effective operating range as a driving source, this is regulated before the stored power is completely released.

Embodiment Hereinafter, the present invention will be described in detail based on an embodiment in which the present invention is applied to a magnetic recording and reproducing device.

In FIG. 29, reference numeral 1 indicates a case of a magnetic recording/reproducing device. In this case 1, the 6th
As shown in the figure, a front cover 2 and a back cover 3 are attached, but these covers are omitted. As shown in FIGS. 31 and 35, the base plate 4 of the case 1 has a hole 7 through which the hub 6 of the disk support shaft 5 (see FIG. 8) projects, and a clutch shaft 8 (see FIG. 8) of the adjustment means. ), an elongated hole 9 supporting one end of the magnetic head block 10 so as to be movable in the radial direction; an opening 13 into which the magnetic head block 10 is fitted and having mutually parallel side edges 11 and a first reference surface 12; and a rack portion 14 of the magnetic head block 10. a hole 1 from which a pinion 17 that engages with a rack 16 of the rack portion 14 projects;
8 are formed respectively. On the back surface of the substrate 4, as shown in FIGS. 27 and 36, there is a partial peripheral wall 1 centered on the hole 18 from which the pinion 17 protrudes.
9 and 20 form a Zenbu storage section 22 that stores the Zenbu 21. The full storage section 22 communicates with the outside of the case via the full winding opening 23.
One side edge 24 (see FIG. 35) of the recess 15 is formed parallel to the first reference plane 12. below,
This one side edge is referred to as a second reference surface 24.

As shown in FIG. 4, the case 1 has a hole 26 through which a winding cord 25 as a winding means is passed, and a hole 28 through which a mode switching member 27 is guided in and out.
, a pair of mounting pieces 29, 29 for attaching the case to a toy (not shown), and a printed circuit board 3.
A notch 32 for pulling out the harness 31 connecting the 0 and a battery, speaker, etc. (not shown) out of the case.
A hole 33 is formed in which the winding string 25 can be pulled out by selecting a pull-out position according to the form of the toy.

Also, near the bottom of case 1, there are figures 4 and 6.
35 and 36, a guide portion 34 that guides the mode switching member 27 in a slidable manner
and a guide rail portion 35 that engages the tip of the member.
are formed respectively.

The structure of the magnetic headblock 10 will be explained based on FIGS. 11 to 19. The magnetic head block 10 has a head support hole 37 into which a magnetic head 36 (see FIGS. 5 to 7, and FIGS. 30 and 31) is fitted and supported, and an erasing magnet 38 slidably fitted into the head support hole 37. It consists of a block body 40 in which a guide hole 39 is formed, and a rack part 14 extending from this body. The rack portion 14 is formed with a stepped portion 41 that is continuous with the upper surface of the main body 40. The rack portion 14 is formed with a bulging second sliding contact portion 42 that is brought into contact with the second reference surface 24 (see FIGS. 29 and 31).

An engaging stepped portion 44 is formed at one end of the block body 40 to slide and engage the elastic arm 43 and the side edge 11 of the opening 13 of the base plate 4 from above. The other end of the block body 40 is formed with a first sliding contact portion 45 that slides into engagement with the first reference surface 12 .

The magnetic headblock 10 is shown in FIGS. 10 and 3.
1, the block body 40 is inserted into the opening 1.
3, the rack portions 14 are respectively positioned in the recesses 15, the engagement step portions 44 are engaged with the side edges 11, and the first sliding contact portions 45 are engaged with the first reference surface 12. The arm 43 is elastically engaged with the side edge 11. The magnetic headblock 10 is maintained in an integral posture by pressing the first and second sliding contact portions 45 and 42 against the first and second reference surfaces 12 and 24 by the elasticity of the elastic arm 43. Next, after engaging the engaging end 47 of the block holding member 46 with the locking part 48 of the case 1, the member is fitted into the stepped part 41,
Tightening the fixing screw 49 prevents the block from lifting up. As a result, the magnetic headblock 10 is aligned with the first and second reference planes 1 with respect to the case 1.
This means that it is attached so that it can be moved freely along lines 2 and 24. The lead wire 50 of the magnetic head 36 is connected to the guide portion 3
Three locking pins 51 (sixth
36), and then connected to the printed circuit board 30.

The magnetic head block 10 includes a magnetic disk 5.
A leaf spring pad 54 is supported for pressing the magnetic head 2 against the magnetic head 36 with an appropriate pressing force.
The leaf spring pad support structure will be explained based on FIGS. 13 to 18. A support hole 53 is formed near one end of the block body 40. The leaf spring pad 54 is made of a long leaf spring material, and has a pad member 56 made of felt or the like fixed to the free end 55 at a position facing the magnetic head 36.
The leaf spring pad 54 is bent at a bending portion 57 at an angle slightly more acute than perpendicular to the free end, and then folded back into a V-shape to form an engaging portion 58. The width W1 of the engaging portion 58 is set approximately equal to the width W2 of the support hole 53. A pair of stepped portions 59, 59 are formed near the bent portion of the engaging portion 58. The width W3 of the stepped portions 59, 59 is the width W2 of the support hole 53.
larger than On both sides of the upper end opening of the support hole 53, a plate spring pad 54 is inserted from the side edge 60 on the pad side.
Receiving portions 61, 61 are provided at positions separated by a distance d2 that is approximately equal to the thickness d1. The receiving portions 61, 61 are formed to be equal to or slightly larger than the height of the stepped portions 59, 59.

When the engaging portion 58, which is widened to a greater extent than the depth of the support hole 53, is inserted into the support hole 53, the first
As shown in FIGS. 6 and 17, the stepped portion 59,
59 engages with both side edges 62, 62 of the support hole,
Regulate its insertion. At this time, the portion of the engaging portion that is continuous with the stepped portions 59, 59 is located between the receiving portion 61 and the side edge 60, and the back surface of the stepped portion 59 comes into contact with the receiving portions 61, 61. I'm letting you do it. That is,
The engaging portion 58 whose insertion depth is regulated by the stepped portions 59, 59 has the receiving portions 61, 61 aligned with the side edges 60.
The back surface of the stepped portion can be brought into contact with this receiving portion by being located at a distance equal to the thickness of the spring. In other words, the leaf spring pad 54 is fitted and supported in the support hole 53 without wobbling.
The pad portion at the free end always presses the magnetic disk 52 against the magnetic head 36 with a stable pressing force.

Even if an attempt is made to swing the leaf spring pad 54 fitted into the support hole 53 in the direction of the arrow (in FIG.
Assuming that the receiving part 61 does not exist, it cannot swing because it is backed up by
The engaging portion 58 is easily bent. Note that it is effective to prevent the leaf spring pad from slipping out by forming a step on the inner surface of the support hole 53, as shown by the chain line 53A in FIG. 16, with which the end of the engaging portion 58 engages. .

An erasing magnet 38 is supported on the magnetic headblock so that it can be moved in and out. Erasing magnet 38
is made of, for example, a plastic magnet or an electromagnet, and is loosely inserted into the guide hole 39 of the magnetic headblock 10. As shown in FIGS. 6 and 7, one end of the erasing magnet 38 is a head portion 62 having a width slightly larger than the width of a recording track (not shown), and the other end is provided with a spring 6.
A through-hole 65 is formed through which the locking portion 64 at the tip of No. 3 is inserted.

As shown in FIGS. 20 and 21, the leaf spring 63 is formed by bending a long leaf spring material, and has a locking part 64 bent at right angles at the tip. ing. The leaf spring 63 has a notch 66 formed at its rear end which is bent into an inverted U-shape, and a mounting hole 67 formed at its intermediate portion.

On the bottom surface of the magnetic headblock 10 are shown FIG.
As shown in FIGS. 7, 12, and 19, support portions 68 and 69 are formed to loosely fit into the notch 66 of the leaf spring 63 and the mounting hole 67, respectively. The support portions 68 and 69 are formed to protrude from fulcrum portions 70 and 71 having a roof-shaped cross section, respectively. Then, as shown in FIGS. 6, 7, and 19, the leaf spring 63 inserts the engaging portion 64 into the through hole 65 of the erasing magnet 38, and connects the notch 66 and the mounting hole 67 to the supporting portion 68. 69, respectively, and are attached to the headblock. A cam 73 faces the bent portion 72 of the leaf spring 63 located between the notch 66 and the mounting hole 67 from the side opposite to the headblock (see FIGS. 6 and 7).

The cam 73 is formed to protrude from the upper surface of the rear end portion of the mode switching member 27, as shown in FIGS. 6, 7, and 22 to 26. cam 73
extends parallel to the direction of movement of the headblock and along its area of movement. An elastic stopper 7 is provided at one end of the cam 73 in parallel with the member 27.
4 is provided. Rail portions 75, 75 are formed at the rear end portion of the mode switching member 27. A spring seat 76 is formed between the rail portions 75, 75. Further, switch contact pieces 77, 77 are fixed to the upper surface of the mode switching member 27.

On the other hand, the guide rail section 35 of the case 1 has a sixth
As shown in FIG. 35, the rail portion 7
Guide grooves 78, 78 into which 5, 75 are slidably fitted
and a spring seat 79 are formed, respectively. Further, on the lower surface of the guide portion 34 of the case 1, FIG.
As shown in FIGS. 6 and 36, the stopper 74
A contact portion 80 is formed where the two abut against each other.

As shown in FIGS. 4 and 6, the mode switching member 27 has the operation end 81 protruding from the hole 28 to the outside of the case, and the rail portions 75, 75 are connected to the guide grooves 78, 78.
It is attached to the case 1 by fitting it into the case 1. An elastic biasing spring 82 is elastically mounted between the spring seats 76 and 79. This member 27 is guided by the hole 28, the guide part 34, and the guide rail part 35, and is slidably supported. At this time, the switch contact piece 77 is in contact with the mode switching contact 83 of the printed circuit board 30. As shown in FIG. 4, FIG. 6, FIG. 7, and FIG. 9, the mode switching contact 83 is
It consists of a common contact 83A, a playback mode contact 83B, and a recording mode contact 83C.

The mode switching member 27 has a tendency to move in a direction in which the operating end 81 thereof protrudes outside the case due to the elasticity of the biasing spring 82. Figures 4 and 6
(see figure). At this time, the switch contact piece 77 connects the common contact 83A and the regeneration mode contact 83B, and maintains the circuit (not shown) in the regeneration mode. In other words, the mode switching member 27 is always biased toward the reproduction mode.

As shown in FIG. 6, when the mode switching member 27 is placed in the playback mode, the cam 73 is
The plate spring 63 is brought into contact with a portion 84 located between the support parts 68 and 69, thereby deforming the plate spring.
That is, when the cam 73 presses the portion 84, the leaf spring 63 is pressed against the fulcrum portions 70, 71 and deformed, and moves the erasing magnet 38, which is locked to the locking portion 64, into the guide hole 39. is being drawn into. Note that when an electromagnet is used as the erasing head, it is not necessary to move the head in and out, but it is sufficient to fix the erasing head to the magnetic head block and energize it during the recording mode.

The full-movement drive source and adjustment means will be explained.

In FIG. 8, a pinion 17 that meshes with the rack 16 is formed at one end of a full winding upper shaft 85. The Zenmai winding shaft 85 has an annular circumferential gap 86 and a slit 87 (the 27th
(see figure) and a driving gear 89.
are integrally formed. The pinion 17 is connected to the base plate 4
It protrudes from the hole 18 of the hole 18 and engages with the rack 16. A square shaft portion 90 (see FIG. 4) is formed at the other end of the full winding shaft 85, and this square shaft portion 90 is connected to the inner case 9 fixed to the case 1.
It protrudes into the rotary body storage section 93 (see FIG. 32) through the hole 92 of No. 1. The middle case 91 will be described later. A rotating body 94 is fitted into a square hole 95 in the square shaft portion 90 . A gear 96 formed on the disk support shaft 5 meshes with the drive gear 89 . The disk support shaft 5 is rotatably supported with the base end of the hub 6 fitted into the hole 7 of the substrate 4 and the other end fitted into the support hole 98 of the inner case 91. A gear 99 formed on the clutch shaft 8 meshes with the gear 97. The clutch shaft has another gear, the worm gear 100.
is formed. The clutch shaft 8 is supported in long support holes 9 and 100A (see FIGS. 5 and 38) formed in the base plate 4 and the inner case 91, respectively, centering on the holes 7 and 98 that support the disk support shaft 5. It is movable within the range of these long holes. The worm gear 100 selectively meshes with the worm shaft 102 of the regulating rotor 101 . The regulating rotor 101 is formed in a toe shape and is made of an elastic body such as rubber whose inner end is fixed to the worm shaft 102 . The rotating body 101 has its outer peripheral edge close to the inner peripheral surface of the brake cylinder 103. The brake cylinder 103 is fixed to the bottom surface of the base plate 4, as shown in FIG. The worm shaft 102 is rotatably supported at one end by the brake cylinder 103 and at the other end by a bearing groove 104 (see FIG. 36) of the base plate.

The Zenmai 21 wound around the Zenmai winding shaft 85 is
As shown in FIGS. 27 and 28, the material is fed through the winding opening 23 and wound onto the winding shaft which is rotated for winding the winding. Zenbu winding entrance 2
3 is constituted by a notch formed in the side wall of the case 1 and a closing portion 105 of the inner case 91 that engages with this notch. The outer end 106 of the full body 21 is connected to a locking protrusion 107 formed on the case 1 and the inner case 1.
It is locked by a locking protrusion 108 formed on the upper surface of.

As shown in FIGS. 1 to 4, a winding cord lead-out section 109 is formed in the rotary body storage section 93 that stores the rotary body 94. As shown in FIGS. The rotating body 94 is the eighth
As shown in FIG.
5 is locked at one end 110. This end 11
0 is housed in the recess 111 of the rotating body 94. The winding string 25 is connected to the winding string lead-out portion 109 and the hole 2.
6 (see FIG. 4) to the outside of the case 1.

The configuration of the full motion range regulation switch will be explained.

1, 37 to 40, a shaft portion 113 that rotatably supports a stopper 112 and a shaft portion 113 that rotatably supports a stopper 112 are provided on the peripheral wall of the inner case 91 forming a rotating body storage portion 93. A full winding upper end regulating step 114 and a full winding release end regulating step 115 are formed for regulating the dynamic displacement region. In the illustrated example, another hoisting outlet 116 is provided, which is located in the hole 3 as shown in FIG.
It is connected to 3. A blocking portion 118 is formed to protrude outward from the peripheral wall 117 . Middle case 9
1 has a stepped portion 119 on which one side of the printed circuit board 30 is placed, and screw holes 120 and 120 for fixing the inner case to the case 1, respectively. Further, as shown in FIG. 38, on the upper surface of the middle case 91, a positioning/guide pin 12
1 is formed, and this pin is fitted into a positioning/guide hole 122 (see FIG. 36) of the case 1.

The stopper 112 is shown in FIGS. 1 to 4 and 3.
As shown in FIGS. 2 and 33, a hole 12 is formed by processing a leaf spring material and fits into the shaft portion 113.
3, and a concentric elastic arm 12 centered on this hole.
4 and the switch parts 125, 126, and the rotating body 94 when rotated to the full winding upper end position shown in FIG.
Arm part 1 curved to escape the center of rotation of
27, and a regulating portion 12 formed at the tip of this arm portion.
It consists of 8. The elastic arm 124 extends to a position where it can abut against the blocking portion 118 (see FIG. 2) when the stopper is rotated. The regulating part 128 is bent in a wide-angle V-shape in cross section along the longitudinal direction, and the winding end regulating step part 1 of the entire winding is bent.
14 (see Fig. 4) and release end regulating step 115
(See FIG. 3).

On the peripheral edge of one end surface of the rotating body 94, there is provided a friction force between the stopper and the regulating part 128.
Continuous wavy protrusions 129 are formed. An engaging portion 130 is formed at the interrupted portion of the projection 129 so as to protrude higher than the projection. In the free state, the stopper 112 is connected to the regulating portion 128 and the switch portion 12, as shown in FIG.
5,126 is bent to provide elasticity. Stopper 112 configured in this way
is rotatably attached to the shaft portion 113 with a screw 131, as shown in FIG. At this time,
The regulating portion 128 is elastically brought into sliding contact with the wavy protrusion 129 . On the other hand, at this time, the switch section 12
The tips of 5 and 126 are positioned so as to be able to come into sliding contact with the power contacts 132 and 133 of the printed circuit board 30.
The power contacts 132 and 133 are formed in a partial arc shape around the shaft portion 113, which is the center of rotation of the stopper 112, and are connected to a power source for a recording/reproducing circuit (not shown).

The details will be described later, but when the rotating body 94 rotates,
The stopper 112 is displaced by the frictional force with the wave-like protrusion 129. However, the elastic arm 12
4 collides with the blocking portion 118, it is not displaced by the above-mentioned frictional force, but is displaced when it is forcibly pushed by the engaging portion 130.

In the illustrated embodiment, the rotating body 94 fitted to the square shaft portion 90 of the full winding shaft 85 and the winding string 25 are used as the full winding means, but instead of this, the eighth As shown in the figure, a square hole 13 is provided in the square shaft portion 90.
3, and the winding key 134 may be engaged with the hole and rotated to wind it up.

The magnetic disk 52 has a recording surface attached to the magnetic head 36.
An engagement hole 13 formed in the center of the
5 is engaged with and attached to the hub 6, as shown in FIG. When the leaf spring pad 54 is attached to the head block 10 after the magnetic disk is attached,
The disk is brought into contact with the magnetic head 36 with a predetermined pressure.

The operation of the magnetic recording and reproducing apparatus of the present invention constructed as described above will be explained. This operation can be roughly divided into three types: a recording mode, a playback mode, and a full winding mode that precedes each of these modes, so each mode will be explained below.

Winding Mode This mode is for winding up the entire drive source, the entire drive is released, the power switch is off, and the magnetic head 36 is
It is located at the outermost end of the track on the magnetic disk 52, which is the recording/playback end position.

The position of the magnetic headblock 10 at this time is shown in FIG. 10, and the positions of the rotating body 94 and the stopper 112 are shown in FIG.

In FIG. 10, a magnetic head block 10
Due to the elasticity of the elastic arm 43, the first sliding contact portion 45
is pressed against the first reference surface 12 and the second sliding contact portion 42 is pressed against the second reference surface 24, respectively, and the pinion 17 is engaged with one end of the rack 16.

In FIG. 3, the stopper 112
28 is pressed against the full release termination regulating step portion 115 by the engaging portion 130. At this time, the elastic arm 124 is engaged with the blocking part 118 and is elastically deformed, and the switch part 126 is connected to the power contact 1.
It is far from 32. That is, the power is turned off. In addition, in this state, the rotating body 94
A hoisting string 25 is wound around. The process leading to this state will be explained in the section on recording mode.

In FIG. 3, when the winding cord 25 is pulled out of the case in the direction of the arrow, the rotating body 94 is rotated counterclockwise. Engagement portion 13 of rotating body 94
0 escapes, the stopper 112 swings clockwise due to the elasticity of the elastic arm 124, as shown in FIG. let Thereafter, the stopper 112 is further swung clockwise due to the friction between the wavy protrusion 129 of the rotating body 94 rotating in the opposite direction and the regulating part 128, and collides with the full winding upper end regulating step 114. This prevents it from swinging. Then, the rotating body 94 is moved approximately 400 degrees from the position shown in FIG.
When rotated in the opposite direction, the engaging portion 130 engages with the restriction 128, as shown in FIG. Engagement part 13
By restricting the rotation of 0, the hoisting cord 25
can no longer be drawn, and the winding of the entire dance ends here. At this time, the tip 126a of the switch portion 126 is away from the power contact 132, turning off the power switch. The power switch is turned off after being turned on for a very short period of time during which the stopper 112 swings from the full-wind release end position shown in FIG. 3 to the full-wind up end position shown in FIG. 4. Therefore, the smaller the swing angle of the stopper 112, the shorter the ON time during winding.

The rotating body 94, which is reversely rotated by the tensile force of the winding string 25, reversely rotates the full winding shaft 85,
The Zenmai 21 (see FIGS. 8 and 32), which is locked to this, is wound up. When the winding shaft 85 rotates in the opposite direction, the pinion 17 rotates in the opposite direction to move the magnetic headblock 10 to the starting position.

In FIG. 5, the pinion 17 and the driving gear 89 are rotated counterclockwise by the reverse rotation of the full winding upper shaft 85. When the pinion 17 rotates in the opposite direction, the magnetic head block 10 meshed with it by the rack 16 is moved to the right in FIG. (also shown in FIG. 31). In FIGS. 5 and 8, rotation of drive gear 89 rotates disk support shaft 5 via gear 96. In FIGS. This rotation of the shaft 5 causes the magnetic disk 52 (see FIG. 29) to rotate in the opposite direction. When the disk support shaft 5 rotates counterclockwise in FIG. 5, the gear 99 (see FIG. 8) meshing with the gear 97 of the disk support shaft 5 is planetarily moved around the shaft, and the worm gear 100 is rotated around the worm shaft. 102. The clutch shaft 8, which is the shaft of the gear 99 and the worm gear, has an elongated hole 9,
It moves within a range of 100A (see Figures 35 and 38). The worm gear 100 is the worm shaft 102
Since the braking action by the regulating rotor 101 (see FIG. 8) does not work when the winding is separated from the winding, it is possible to wind up the entire wind lightly.

During the full winding operation, the mode switching member 27 is not operated at all. Therefore, erasure magnet 3
8 is held at a position retracted from the magnetic disk 52 (see FIG. 6).

Recording Mode This mode is a mode in which the whole song is wound up, and the sound is recorded on the magnetic disk while releasing it and rotating the magnetic disk in the forward direction.

As shown in FIG. 4, the state in which the entire winding is wound and the power switch is turned off is maintained by pulling the winding string 25. Then, as shown in FIG. 7, the mode switching member 27 is pushed in against the elasticity of the biasing spring 82 (see FIG. 6). As a result, the switch contact piece 77 successively connects the common contact 83A and the recording mode contact 83C to switch the circuit (not shown) to the recording mode. Further, by switching the mode switching contact 83, a power circuit for a lamp indicating the recording mode may be turned on, and the lamp may be turned on by turning on a power switch, which will be described later.

When the mode switching member 27 is pushed in, its cam 73 faces the bent portion 72 of the leaf spring 63, as shown in FIG. As a result, the leaf spring 63 elastically returns to its free state, and the erasing magnet 38 latched to its free end moves within the guide hole 39 to bring its head portion 62 into contact with the magnetic disk 52. The contact pressure at this time is constant due to the relatively soft elasticity of the free end of the leaf spring 63 with the contact portion between the bent portion 72 and the cam 73 as a fulcrum. It goes without saying that the head section 62 comes into contact with the upstream position of the magnetic track traced by the magnetic head 36 in the direction of rotation of the magnetic disk 52 during recording.

When the mode switching member 27 is pushed in and the restraining force on the hoisting string 25 is cut off, the rotating body 94, which was located as shown in FIG. 4, is moved counterclockwise by the full release force. Rotates forward. When the engaging portion 130 moves in the same direction due to rotation of the rotating body, the stopper 1
12 are swung in the same direction by the friction between the wave-like protrusion 129 and the regulating portion 128. Stoppa 112
When the switch part 126 swings, the tip 12 of the switch part 126 swings.
6a contacts the power contact 132 to turn on the power switch. This power switch is turned on almost immediately after the binding force to the hoisting string 25 is cut off. Therefore, almost at the same time as the restraining force of the hoisting string 25 is cut off, a sound may be emitted toward a microphone (not shown). The winding string 25 is wound around the outer periphery of the rotating body 94.

When the stopper 112, which swings due to friction with the rotating body 94, swings approximately 40 degrees, the tip 124a of the elastic arm 124 collides with the blocking surface 118a of the blocking surface 118, as shown in FIG. Then, the elasticity of the elastic arm 124 overcomes the frictional force between the wavy protrusion 129 and the regulating portion 128, so that the swinging is prevented at this position. The rotating body 94 has a wavy protrusion 1
29, it continues to rotate forward while slidingly contacting the regulating portion 128. As shown in FIG. 2, the stopper 112, which is prevented from swinging by the elastic arm 124, maintains the switch portion 126 in contact with the power contact 132, that is, the power switch is maintained in the on state. become.

On the other hand, when Zenbu is released, Zenbu winding upper shaft 85
rotates forward, causing the pinion 17 to move clockwise (30th
(in the figure). In Figure 30,
When the pinion 17 rotates forward, the rack 16 meshed with it is moved to the left. The rotation of the full winding shaft 85 rotates the gear 99 in the direction of the arrow via the drive gear 89 and gears 96 and 97. A gear 99 rotated by the gear 97 is planetarily moved around the gear 97 and meshes with the worm shaft 102 to rotate it. The rotation of the full-length winding shaft 85 is transmitted to the worm shaft 102 by a speed increasing gear train extending from the drive gear 89 to the worm gear 100, and when the rotation of the governor rotor 101 becomes faster than a predetermined speed, the rotor expands due to centrifugal force, slides into contact with the inner circumferential surface of the brake cylinder 103, and receives braking. The sliding contact and separation between the regulating rotor 101 and the brake cylinder 103 continues until the full release is regulated, and the rotation of the speed increasing gear train is adjusted and maintained at a constant speed. In other words, the disk support shaft 5 and the full winding shaft 85 are
It will be rotated at a constant speed.

Therefore, since the pinion 17 and the hub 6 rotate forward at a predetermined speed in synchronization with each other, the magnetic headblock 10 moved by the pinion 17 moves at a constant speed, and the magnetic disk 52 locked to the hub 6 moves at a constant speed. also rotates at a constant speed. The magnetic head 36 that moves linearly is connected to the magnetic disk 5 that rotates in the forward direction.
2, it comes into sliding contact in a spiral manner. The recording track traced by the magnetic head 36 has its recording erased at the immediately preceding position by the head section 62 of the erasing magnet (see FIG. 29). The magnetic head 36 performs magnetic recording on the erased track. The movement trajectory of the magnetic head 36 and the erasing magnet (head part 62) is as shown by lines L and l in FIG.
It is approximately parallel to the radial direction of the magnetic disk 52.

Magnetic headblock 10 moving for recording
As shown in FIG. 31, the first and second sliding contact portions 45 and 42 are pressed against the first and second reference surfaces 12 and 24, respectively, by the elasticity of the elastic arm 43, so that In other words, the magnetic head 36 can be reliably moved on the line L (see FIG. 29) while maintaining the posture shown in FIG.

A magnetic disk 52 is pressed against the magnetic head 36 by a leaf spring pad 54. The leaf spring pad 54 has an engaging portion 58 at its base end inserted into the support hole 53.
(See FIG. 16) and is supported by the headblock, so that as the magnetic headblock 10 moves, the pad member 56 and the magnetic disk 52
Due to the friction with the magnetic head 36, the free end of the magnetic head 36
Trying to sway in a direction that is more delayed. However, the back surface of the stepped portion 59 of the leaf spring pad 54 is connected to the receiving portion 61.
(See FIG. 16), the swinging of the pad 54 is completely prevented. Therefore, the pad member 56 corresponds to the magnetic head 36 at a constant position from start to finish, and the head and the magnetic disk 5
2 are always in contact with a constant pressing force.

FIG. 2 shows a state in which the stopper 112 maintains the power switch on, but as the full release force approaches the end, the engaging portion 130 of the rotating body 94 engages the restricting portion 128. match.

In FIG. 3, the stopper 112 engaged by the engaging portion 130 is pushed by the normal rotation of the rotating body 94, elastically deforming the arm against the elasticity of the elastic arm 124, and pushing the stopper 112 into the regulating portion 128. The entire movement is brought into contact with the release end regulating step portion 115. Since the movement of the regulating portion 128 is blocked, the rotation of the rotating body 94 is also blocked. At this time, the Zenmai 21 still has surplus power, but in order to create a sufficient operating range as a driving source, the driving force is cut off leaving the surplus power.

When the rotating body 94 stops, the gear train connected thereto also stops. That is, the pinion 17 stops and the movement of the magnetic head block 10 ends, and the hub 6 stops and the rotation of the magnetic disk 52 ends. At this time,
The magnetic head 36 is located at the outermost end of the track of the magnetic disk 52.

On the other hand, when the rotating body 94 forcibly pushes the stopper 112, the switch part 126 has its tip 126a separated from the power contact 132, turning off the power switch, as shown in FIG.

Stopping the forward rotation of the magnetic disk 52, that is,
The end of the recording mode can be recognized by the fact that the hoisting cord 25, which is drawn into the rotating body 94, is no longer drawn in. Alternatively, a recording mode display lamp may be provided that lights up when the mode switching member 27 is pressed and the power switch is on, and the lamp is turned off when the power switch is turned off. In any case, when the pressing force on the mode switching member 27 is released after the full release force is regulated, the head section 62 is brought into contact with the magnetic disk 52 during the recording mode as shown in FIG. As shown in FIG. 6, the eraser magnet 38, which has been removed, is retracted into the guide hole 39 by the leaf spring 63 bent by the cam 73.

Reproduction Mode This mode is a mode for reproducing audio signals recorded on a magnetic disk.

Before executing this mode, the hoisting mode is executed. Since the winding mode has already been explained, the explanation will be omitted here, and only the state of each member at the end of the winding mode will be described.

As shown in FIG. 6, the erasing magnet 38 is
It is drawn into the guide hole 39 by the leaf spring 63 deformed by the cam 73 of the mode switching member 27 . The switch contact piece 77 is a common contact 38A
and a regeneration mode contact 83B to maintain a circuit (not shown) in the regeneration mode.

As shown in FIG. 4, when the stopper 112 is pushed by the engaging portion 130 of the rotating body 94, the power switch is turned off by separating the tip 126a of the switch portion 126 from the power contact 132. has been done.

The winding string 25 is given a binding force that resists the releasing force of Zenmai.

The magnetic head 36 is located at the inner end of a track (not shown) of the magnetic disk 52, as shown in FIGS. 29 and 31. That is,
The position of the magnetic head 36 at this time is the same as the starting position in the recording mode, and it will be automatically positioned at the end of the winding mode.

Then, when the binding force on the hoisting string 25 is released,
The rotating body 94 located as shown in FIG.
It rotates counterclockwise due to Zenmai's release force.
As the rotating body 94 rotates, the stopper 112
The operation leading to the state where the power switch is kept on as shown in FIG. 2 is the same as in the recording mode described above, so a description thereof will be omitted to avoid duplication.

The rotating body 94 is driven by a full release force, and this release force is generated by a speed-increasing force consisting of a drive gear 89, gears 96, 97, 99, and a worm gear 100, as shown in FIG. The speed is controlled by the gear train, the worm shaft 102, the brake rotor 101, and the brake cylinder 103, and drives the pinion 17 and the hub 6 in forward rotation at a constant speed. Therefore, as shown in FIG. 29, the magnetic disk 52 is rotated in the direction indicated by the arrow, and the magnetic head 36 is moved linearly approximately along L. Due to this relative movement between the two, the magnetic head 36 traces the recording track in a spiral manner and reads the audio signal recorded on the track. This audio signal is reproduced through a speaker (not shown). In this reproduction mode, the magnetic head block 10 moves while maintaining a constant posture, and the plate spring pad 54 presses the magnetic disk 52 against the magnetic head 36 in a stable position, as in the recording mode described above.

In this regeneration mode, as shown in FIG. 3, the engaging portion 130 of the rotating body forcibly pushes the stopper 112 to bring the restricting portion 128 into contact with the full release end restricting step portion 115. , the rotation of the rotating body itself is prevented, and the tip 126a of the switch portion 126
The process ends when the switch moves away from the power contact 132 and the power switch is turned off. When the playback mode ends, the winding string 25 is pulled into the case. and,
Since the driving force is mechanically controlled by the full release force, there will be uneven rotation of the magnetic disk itself, but since the driving conditions are approximately constant in recording mode and playback mode, the relative speed difference will be reduced. No sound is produced, and a suitable playback sound can be obtained. In particular, in this case, the gear train up to the worm gear remains in mesh, so there is no relative speed difference.

When the recording mode and the playback mode are finished, the stopper 112 moves the elastic arm 12 as shown in FIG.
4 is elastically deformed and the power switch is held in the off state. In order to prevent this creep of the elastic arm 124, the shape of the blocking portion 118 may be set as shown by reference numeral 118A in FIG. 34. The elastic arm 124A abuts against the blocking surface 118B to maintain the switch-on state (see FIG. 2), and the stopper 112 is forcibly pushed by the engaging portion 130 of the rotating body (see FIG. 3). ), it escapes over the blocking surface 118B to the back of the surface, as shown at 124B. On this back, elastic arms 124B
is not subject to any binding force. In the hoisting mode, when the stopper 112 is swung by the frictional force with the rotating body 94, the elastic arm 124B moves to the slope 118C.
The object slides over the blocking portion 118A.

In the illustrated embodiment, a wavy protrusion 129 is formed on the periphery of the end surface of the rotor 94 in order to increase the friction between the rotor 94 and the stopper 112, which rotate in forward and reverse directions. Either the portion or the regulating portion may have a rough surface, or a high friction material such as a rubber plate may be attached to the rotating body or the regulating portion.

Further, as a power switch, the illustrated example has power contacts 132, 133 and a contact portion 1 of the stopper 112.
Although 25 and 126 are mentioned above, the power switch may be constituted by a non-contact proximity switch in which the contact part is configured as a proximate body, or a reed switch in which a permanent magnet is fixed to the contact part and fixed to the printed circuit board 30.

Effects of the Invention As described above, according to the present invention, the switch is turned on only by the full-length operation, so there is no need for an independent switch operation.

In addition, since the switch is automatically turned off at the position where the release of Zenmai is regulated, there is no problem of forgetting to turn off the switch, and there is no unnecessary loss of power.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the full-motion range regulating switch of the present invention, FIG. 2 is a bottom view showing the above switch in the on state, and FIG. 3 is a bottom view showing the above switch in the off state. Fig. 4 shows the fully wound state, and is a bottom view showing the magnetic recording and reproducing device to which the present invention is applied. Fig. 5 is a plan view showing the same state as the above fully wound state. A in FIG. 4 showing a state in which the mode switching member is placed in the playback mode.
-A sectional view, FIG. 7 is a sectional view showing the same recording mode as above, FIG. 8 is a BB sectional view in FIG. Fig. 10 is a plan view showing the headblock placed at the recording/playback end position, Fig. 11 is a plan view of the headblock, and Fig. 12 is a plan view showing only the main parts.
The figure is a bottom view of the same, Figure 13 is a right side view of the headblock with the leaf spring pad support structure attached, and Figure 14 is a right side view of the headblock with the leaf spring pad support structure installed.
The figure is a side view showing the leaf spring pad and headblock, Figure 15 is a plan view of the same as above, and Figure 16 is the 15th view when the leaf spring pad is attached to the headblock.
17 is a sectional view taken along the line DD in FIG. 15, FIG. 18 is an exploded perspective view showing the main parts of the leaf spring pad support structure, and FIG. 19 is a sectional view taken along the line C--C in FIG. FIG. 20 is a bottom view of the headblock with the in/out mechanism installed; FIG. 20 is a side view of the elongated leaf spring; FIG.
1 is a plan view of the same as above, FIG. 22 is a plan view of the mode switching member, FIG. 23 is a bottom view of the same as above, FIG. 24 is a cross-sectional view taken along the line E-E in FIG. 23, and FIG.
The left side view of the main part of the figure, Figure 26 is the arrow F in Figure 23.
Fig. 27 is a bottom view showing the full-length storage section, Fig. 28 is a collapsed front view showing the full-length retracting opening, and Figure 29 shows the full-length movement area regulating switch of the present invention. FIG. 30 is a plan view showing an example of the applied magnetic recording/reproducing device, and FIG. 30 is a plan view showing the headblock, the full-movement drive source, and the adjusting means, and shows the full-movement release state. FIG. 32 is a sectional view taken along the line GG in FIG. 4, FIG. 33 is a side view showing the stopper in a free state, and FIG. 34 is a modified example of the restricting part. 35 is a plan view of the case, FIG. 36 is a bottom view of the same as above, FIG. 37 is a bottom view of the inner case in which the regulating means is formed, FIG. 39 is a sectional view taken along the line H--H in FIG. 37, and FIG. 40 is a front view of FIG. 37 viewed from the direction of the arrow. 21...Full movement, 94...Rotating body, 112...Stopper, 114...Full movement release end regulating step, 1
15... Full release end regulating step part, 118... Blocking part, 125, 126... Switch part, 128...
Regulation part, 130...Engagement part, 131, 132...
power contact.

Claims (1)

[Scope of utility model registration request] A rotating body that rotates in forward and reverse directions by full hoisting and release, a stopper that is in sliding contact with an end face of the rotating body and is displaceable in the rotational direction of the rotating body, and a displacement area of the stopper. regulatory measures to regulate;
a switch that is turned off by a switch unit integrated with the stopper when the stopper is positioned at least at a fully released end position;
An engaging portion for forcibly moving the stopper is provided on the end face of the rotating body, and an elastic arm is provided on the stopper to overcome the frictional force with the rotating body and prevent displacement of the stopper, The elastic arm maintains the stopper in the switched-on state at a position immediately before the end of the full release, and the engaging portion forcibly displaces the stopper to the end of the full release and presses it against the regulating means to stop the rotating body. A full-motion range regulating switch characterized by stopping the switch and turning off the switch.