JPS59221861A - Lock releasing mechanism of cassette holding part in magnetic tape device - Google Patents

Abstract

PURPOSE:To use no independent driving sources to make a device small-sized and operate the device surely by operating a slider, an intermediate member, etc. with the motion of a loading ring to release the lock and setting the intermediate member to the neutral state thereafter. CONSTITUTION:An engaging piece 152 of a freely slidably supported slider 145 is brought into contact with an operator 158 driven by a lower loading ring 163. A rocker 147 is so provided that it can be brought into contact with an intermediate member 165 which a lock releasing slider 101 is brought into contact with. When the ring 163 is turned counterclockwise in the final stage of tape unloading, the operator 158 is turned right, and the slider 145 is moved left, and the rocker 147 is turned right, and the intermediate member 165 is turned left to press a projecting piece 107 forward, and the lock is released; and thereafter, the member 165 is returned to the neutral state. Thus, an independent driving source is not used to make the device small-sized, and the operation is performed surely.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF THE INVENTION The present invention relates to a novel magnetic tape device with a lock release mechanism for a cartridge holder. For details, please refer to the procedure for unlocking the cassette holder without using its own drive source.
The operation of unlocking the cassette holding unit is performed by picking up the movement of the member that moves during tape loading and tape unloading, that is, indirectly using the driving force of the drive source for tape loading and tape unloading. In this way, the device is made smaller and lighter, and the movement of each member for unlocking the holder by force is made into a two-dimensional movement, thereby ensuring reliable operation. The present invention aims to provide a cassette holder unlocking mechanism for a novel magnetic tape device.

BACKGROUND TECHNOLOGY AND PROBLEMS A magnetic tape recorder (for example, an audio tape recorder) that performs recording and/or playback using a magnetic tape housed in a tape cassette is known as a video tape recorder (hereinafter referred to as an rVTR, etc.). ” and 1.) U), -/
1llt, a cassette holder or l+t for loading the tape cassette into the 91 set position of a VTR, etc.
ii. The tape cassette is removably attached to the tape cassette holding section, and its position is changed when in use and when taking it out.When in use, the tape cassette is attached to the cassette holding section and the tape cassette is attached to the cassette holding section. The cassette holder that has been pushed into the set position is locked in the pushed state by an appropriate locking mechanism, and when taken out, the front or part of the cassette holder is The tape cassette can be taken out by pushing it out of the VTR or the like.

In such a VTR or the like, it is important to be able to reliably control the force state using a locking mechanism. The cassette holding section locked at this set position must be unlocked when the tape cassette is taken out after recording or playback.

By the way, in order to release the locked state of the cassette holding part, it is necessary to mechanically move the mouth/ink member that locks the cassette holding part. Motors and solenoids are generally considered as drive sources for this purpose, but motors and solenoids are relatively large and heavy parts, so it is important to reduce the number of such parts as much as possible. Contributes to miniaturization and weight reduction.

Since the cassette holding section is unlocked after the tape in the tape cassette is used, the cassette holding section picks up the last movement of the member that moves during tape unloading and moves in conjunction with this. By performing the lock release operation, there is no need to independently provide a motor, solenoid, etc. for unlocking the cassette holding portion, and the device neck can be made smaller and lighter.

However, even though the movement of the last part of the moving member is picked up during tape unloading, it must be in a state where it can be opened again when tape uncoding is completed, and it is also necessary to The member that moves during tape loading must also move during tape loading, or even if movement during tape loading is detected, the cassette holder must not be unlocked by this movement.

[I] The present invention has been made in view of the above-mentioned problems,
At the time of tape unloading, the cassette holder is released long, and when tape unloading is completed, the cassette holder can be locked again.The cassette holder is also locked during tape loading. A cassette holder lock release mechanism in a new magnetic tape device that does not release by picking up the movement of members moved during tape rope inking and tape unloading, and enables reliable operation. The purpose is to provide

SUMMARY OF THE INVENTION In order to achieve the above object, the cassette holder unlocking mechanism in the magnetic tape device of the present invention includes an unlocking operation for moving a locking member that locks the cassette holder at a predetermined set position in the unlocking direction; an intermediate member that is rotated between a first position and a second position and that moves the lock release member in the lock release direction when the lock release member is rotated to the first position; and a slider that is moved in the other direction opposite to the direction of the force during tape unloading, and when the slider moves in the one direction, it engages with the intermediate member and moves it to the second direction. and when the slider moves in the other direction, engages with the intermediate member to rotate it to the first position, and the intermediate member is rotated toward the first and second positions. When the slider is rotated to position 2, it is disengaged from the slider and returned to an intermediate position between the two positions.

Therefore, according to the present invention, the movement of the member that moves during tape loading and tape unloading can be detected without using a unique drive source for unlocking the cassette holder. By indirectly using the driving force of the drive source of the unrope ink reservoir to perform the long release operation of the cassette holding section, the device is made smaller and lighter, and the long release operation of the cassette holding section is also made easier. It is possible to provide a mechanism for releasing the cassette holder in a novel magnetic tape device, which enables reliable operation by making all the movements of the various members two-dimensional.

EMBODIMENTS Below, details of the mechanism for releasing the lock of the stent holder in the magnetic tape apparatus of the present invention will be explained according to the illustrated embodiments. The drawings show an embodiment in which the cassette holder long release mechanism of the magnetic tape device of the present invention is applied as a cassette holder opening/release mechanism of a video camera in which a VTR deck is incorporated in the body weight.

Reference numeral 1 denotes a video camera in which a VTR deck is integrally incorporated, and comprises a photographing section 3 including a photographing lens 2 and a fourth VTR deck section 4 disposed behind the photographing section 3. An image pickup tube (not shown) is arranged behind the photographing section 3, and the lens 2
The optical image of the object passed through the camera tube is converted into an electrical video signal, and the video signal is magnetically recorded on a magnetic tape via a magnetic head provided in the VTR deck section 4. It is composed of 5 is photography department 3
An optical view finder is provided on the top of the camera 1 in a foldable state so that it can be protruded toward the side of the camera 1. Reference numeral 6 denotes a handle which also serves as a battery organ, and is provided at the lower part of the fourth side of the VTR deck section 4 so as to be rotatable. The handle 6 is designed to be opened and turned at several predetermined angles, and is unlocked and rotated by pressing a long release button 7 provided at its base end. I can do it. When the camera 1 is used, the diagonal grips 1'' and 6 are placed in the state approximately shown in FIG. When the camera 1 is not in use, rotate the handle 6 upward and move its longitudinal direction to the VTR deck section 4.
By aligning it along the surface, it becomes easier to fit the camera into the concavity 1. 7 is a microphone for recording 11, and the audio captured by this microphone 7 is transferred to a VTR,
A magnetic terminal is provided in the opening part 4, and a magnetic terminal is provided through the magnetic terminal.
- It is configured to be magnetically recorded on the disk. 8.8 is a cuff cover attached to the VTR electric part 4,
Reference numeral 9 denotes a power ceramic mounting section movably provided with respect to the VTR, and reference numeral 10 denotes a cover attached to the outside of the cassette mounting section 9.

Reference numeral 11 designates a tape cassette for a VTR, and within the case of the tape cassette 11 are arranged two tape reels 13 and 14 each having a magnetic tape 12 wound thereon from both ends as shown in FIG. The front part of the case, which is the tape drawer part, has a cover 15 that can be opened and closed freely.
covered with.

Next, as shown in FIGS. 2 to 9, the fourth VTR deck section 4
I will explain it in the section a.

16 is the fourth chassis of the VTR deck section 4. 17.17
is the front side of the chassis 16, that is, the lower side in FIG. The left side is the left.When video camera 1 is in use, the upper part of figure f32 is the lower part, the lower part of figure 2 is the upper part,
Further, the right side in FIG. 2 is the rear part and the left side is the front part, but for convenience of explanation, the positional relationship will be as described above in the following description. ) on the upper surface of the chassis 16 (
Further, the vertical positional relationship will be explained below with the paper surface side at the top and the paper spine side at the bottom in FIG. 2. ) is a reel stand that is rotatably provided in a slightly protruding state, and each reel stand 17
, j7 are integrally provided with retaining levers 18 and 19 that engage with the tape reels 13 and 14 of the tape force center 11, respectively.

Next, the cassette holding mechanism 20 will be explained (see FIG. 3).

Reference numeral 21 denotes a support wall erected along the right side edge of the chassis 16, and the support wall 21 is formed in a substantially gate shape that extends from the front to the front when viewed from the side, and extends from the lower edge of both ends to the left. To L
It is attached on the surface of the chassis 16 by fixing it to the chassis 16 with a mounting piece bent in a letter shape or with a screw. Reference numeral 22 denotes a guide hole formed at a distance of 1υ toward the front side of the support wall 21, and the guide hole 22 extends diagonally from a position closer to the chassis on the front side of the support wall 21 to an intermediate portion toward the opposite side of the chassis. The front end of the guide hole 22 is slightly cut out in an arc shape toward the shear side. A hole 23 (see FIG. 4) is formed in the front of the support wall 21. Reference numeral 24 denotes a support wall that is erected at a position close to the left side edge of the chassis 16 so as to face the support wall 21 in parallel, and the support wall 24 has a guide hole 22 formed in the support wall 21. A kite hole 25 having a similar shape and formed at a position opposite to the position where the guide hole 22 is formed.
In addition, a hole 26 (see FIG. 4) is formed in the front of the support wall 24.

Reference numeral 27 denotes a cassette holder, which is formed into a substantially frame shape with openings on the front side, the front side, and the three sides, by the bottom plate 28 and side plates 29 and 29' that are integrally raised from both left and right ends of the bottom plate 28. ing. The cassette holding mechanism mounting plates 29 and 29' are formed with kite holes 30 and 30' extending approximately parallel to the chassis surface from the center near the upper edge of each to the front side. A pipe-shaped reinforcing beam 31 or frame is passed between the front parts near the front.

32, 33, 32', and 33' are legs that support the cassette holding part 27 movably relative to the support walls 21 and 24, respectively, and the cassette holding part 27 is supported by these legs 32.33, 32', and 33'.
33, 32', and 33', it is supported movably between a position where it fits between the support walls 21 and 24, that is, a set position, and a position where it floats away from the chassis 16, 1δ, that is, a floating position. . That is, the base ends of the legs 32.32' are rotatably supported by the side plates 29.29' of the cassette holding part 27 by pins 34.34', and the base ends of the legs 32.32'
Each free end of 2' has a guide pin 3 protruding from the free end.
The kite hole 22.25i is moved against the support wall 21.24 by the roller 36.36' fitted on the outside of the roller 36.35' and slidably engaged with the inclined guide hole 22.25. supported as possible. The legs 33 are formed in an oval shape. Pins 37 and 37' are protruded from the bent portion of the leg 33 and the base end of the leg 33', respectively.
3.33' is rotatable with respect to the support wall 21.24 by being loosely inserted into each pin 37.37' or the hole 23.26 formed in the support wall 21.24; , rollers 39 and 39' rotatably supported by guide pins 38 and 38' protruding from the respective tips of the legs 33 and 33' are connected to the side plate 2 of the cassette holder 27.
It is movably supported by the side plate 29.29' of the cassette holding portion 27 by being movably engaged with the kite hole 30.30' formed in the kite hole 30.30'.

Note that the portions where the base ends of the legs 32, 32' are rotatably supported by the side plates 29, 29' of the cassette holding part 27 are supported by the reinforcing beams 3.
Each tip of the pin portions 34, 34' at both ends of the pin 1 is caulked to be rotatably supported by the side plate 29, 29',
In addition, the portion where each tip of the leg 32.32' is movably supported in the kite hole 22.25 of the support wall 21.24 has a diameter larger than the width of the guide hole 22.25 on the outside of the roller 36.36'. The formed flanges 40.40' prevent the kite from being removed from the hole 22.25. Further, the bent portion of the leg 33 and the base end of the leg 33' or the support wall 2
1. The part rotatably supported by 24 is each pin 37
．． A ring is engaged with a groove (not shown) formed at the tip of the leg 37' to prevent the leg from being removed from the support wall 21.24. The portion of the side plate 29.29' that is movably supported relative to the kite hole 30.30' is supported by each roller 39.
The guide hole 3 is connected to the guide hole 3 by two flange 41.41' formed inside the kite hole 39' with a diameter larger than the width of the kite hole 30.30'.
A stop has been made to prevent removal from 0.30'. Approximately central portions of the legs 32 and 33 are rotatably connected by a pin 42, and approximately central portions of the legs 32' and 33' are also rotatably connected by a pin 42'. There is.

43 is a tension coil spring, and spring 42
One end is secured to a securing piece 44 that projects inward from the lower blade on the near side of the support wall 21, and the other end is secured to the tip of the bent portion 33a bent downward of the leg 33. The tip of the bent portion 33a is pulled toward the front side of the support wall 21 by a spring 43. Therefore, the leg 33 is urged to rotate so that the end that is engaged with the guide hole 30 formed in the side plate 29 of the cassette holding fjB27 always moves upward, that is, away from the chassis 16. Due to the rotation biasing force of the leg 33, the guide hole 30 of the cassette I/holding portion 27 is pressed toward the side opposite to the chassis by the roller 39 fitted onto the pin 38 at the tip of the leg 33, so that the cassette I/holding portion 27 is pushed against the support wall 21. 24, ie, away from the chassis 16.

Reference numeral 45 denotes a protruding piece that protrudes toward the chassis 16 from approximately the center of the lower end of one side plate 29 of the cassette holder 27. A beveled edge 47 that is cut diagonally toward the side is formed, and a lock pin 48 that protrudes inward is formed above the formation position of the beveled edge 47 on the projecting piece 45.
is provided.

When the cassette holder 27 is pressed toward the chassis 16 from the state where it is floating above the chassis 16 shown in FIG.
' are rotated 5 so as to be folded into each other, and as a result, the cassette holder 27 is moved toward the chassis 16 and placed between the support walls 21 and 24 (set position). The locking pin 48 of the protruding piece 45 that has been moved through the notch 16' formed on the right side edge of the chassis 16 is lengthened by a locking mechanism (not shown).
is long at the set position 1'. Then, when the cassette holding part 27 locked in the vertical position in this way is unlocked from the lock pin 48, the legs 3
3 is rotated by the tensile force of the spring 43, thereby returning to the state where it floats above the chassis 16 shown in FIG.

Reference numeral 49 denotes a reinforcing crosspiece that is placed between the front sides of the upper edges of the side plates 29 and 29' of the cassette holding section 27, and approximately at the center of the crosspiece there is a reinforcing crosspiece whose tip is bent in a V-shape toward the bottom plate 28 side. The plate 50 is attached. Similarly, 51 is the side plate 29.29
The frame is a reinforcing bar extending between the front edges of the upper edge of the frame 51, and mounting holes 52 and 52' are provided from both sides of the front edge of the frame 51, respectively.
Mounting pieces 53 and 53' are formed to protrude forward, and the cover 10 has mounting pieces 53 and 53 formed therein by screws screwed into the mounting holes 52 and 52' on both sides of the lower side of the cover 10.
．． 53'. That is, the force /<-10 constitutes the side surface of the cassette holding portion 27 opposite to the chassis. Furthermore, protrusions 54 and 54' are provided protruding toward the front from both sides of the near side edge of the reinforcing bar 51, and the tips of the protrusions 54 and 54' are bent diagonally toward the chassis side. A small hole 55,55' is formed at the bent tip.

Reel stands 1 are provided on the chassis 16 at positions close to the left and right sides of the bottom plate 28 of the cassette holder 27, respectively.
Openings 56 and 56' corresponding to the positions of the tape reel drive shafts 18 and 19 in 7.17 are formed, and the opening O edge of one of the openings 56 has an opening 56 on the right side of the front edge thereof bent toward the chassis 16 side. A bent protruding piece 57 is formed, and protruding pieces 58 and 59 bent toward the chassis 16 are formed on the left side edge of the opening edge of the other opening 56' and on the front side. There is.

Reference numerals 60 and 60 designate guide pieces for guiding the insertion of the tape cassette, which protrude toward the front from both sides of the front edge of the bottom plate 28 and are bent slightly obliquely toward the chassis 16 side.

Reference numeral 61 denotes a projection formed by cutting and raising the bottom plate 28 toward the chassis 16 at a substantially central position between the opening 56 on one side and the guide piece 60 on the other side. Reference numeral 62 denotes a leaf spring that is provided in a substantially V-shape projecting from the substantially central portion of the front edge of the bottom plate 28 toward the second side.

Reference numerals 63 and 63' designate cassette holders provided at the front g++ near the inner upper edge of the side plates 29 and 29' of the cassette holder 27, respectively. Cassette presser foot 63 and 6
3' consists of base plates 64, 64' rotatably supported by side plates 29 and 29', respectively, and suppressing pieces 65, 65' integrally provided on each base plate 64, 64'. Substrate 64.
64' has its base end rotatably supported by a pin 66, 66' that projects inward from the side plates 29 and 29', and its tip, which is formed approximately in the shape of a bow, is supported by the side plates 29 and 29'. The guide holes 30.30' formed in the guide holes 29.29' extend to the front edge of each of the guide holes 30.30', and
It is said to have a 7'1o beveled edge. Each suppressing piece 65, 65' projects inward from approximately the center of the inner surface of the board 64, 64', and extends from the front side of each suppressing piece 65, 65' through the lower side to the front side. All parts are equipped with anti-slip parts made of material with a high coefficient of friction such as soft rubber.
8.68' is applied. 69.69' is a torsion/<ne, and the intermediate ring-shaped part of each torsion/hene 69.69' is fitted onto a pin 66.66', and one end thereof is connected to a protrusion 54.54' of the reinforcing bar 51. The other end is connected to the hole 55.55' formed in the suppressing piece 65.
65', and is pressed against the upper edge of the cassette presser 63.
63' is biased to rotate toward the chassis 16 by the torsion/henge 69, 69'. Reference numerals 70 and 70' designate rotary stoppers that are integrally formed in an upright manner at approximately the center of the upper edge of the substrates 64 and 64', and whose tips are bent outward. Rotating stone puff 0.
The bent ends 70a, 70a' of the force center holding portion 27 face the upper edges of the side plates 29, 29', respectively.

Thus, when the cassette retainer 27 is in the floating position shown in the third panel, the cassette pressers 63 and 63' are attached to the rollers 39 and 39' attached to the ends of the legs 33 and 33'.
is close to the front end of the guide hole 30, 30',
The beveled edge 67.67' of the tip 11d of the board 64.64' is pressed toward the side opposite to the chassis by the flange 41.41' of the roller 39.39', so that the 1-john spring 6
It is rotated to the opposite side of the chassis against the pressing force of 9.69',
Each pressure hole 165, 65' is placed at a position 16 where the distance between its lower surface and the bottom plate 28 is greatest. In this state, the tape cassette 11 can be inserted into the cassette holding section 27. Then, when the tape cassette 1-11 is inserted into the cassette holder #1 section 27 and the force center holder 27 is moved toward the above-mentioned position, the tape cassette 1-11 is attached to each end of the cassette 33 and 33'. Roller 39, 9
is moved toward the front side of the guide hole 30.30', so that the board 64.64' is caused by the torsion spring 69.6.
9' is rotated toward the chassis 16 side, and accordingly, each suppressing piece 65, 65' moves toward the chassis side, and the lower surface of the suppressing piece 65, 65' moves to the upper side of the tape cassette 11.
Jf is attached to the side.

Note that if the cassette holder 27 is pushed toward the set position when the tape cassette 11 is not installed in the cassette holder 27, the cassette presser 63.6
3' stops rotating when the bent ends 70a, 70a' of the rotation stoppers 70, 70' provided upright on the base plate 64, 64' are engaged with the upper edge of the side plate 29, 29'. The cassette holder 27 is attached to the chassis 16.
Flange 4 of roller 39, 39' when lifted from
1.41' allows for upward rotation.

Next, the cassette holder locking mechanism 71 will be explained (see FIGS. 5 to 9). The locking mechanism 71 is provided on the right side of the VTR deck section 4.

Reference numeral 72 denotes a base on which each member constituting the lock mechanism 71 is supported, and is fixed to the chassis 3.6, and the ring mechanism 71 is provided on the right side of the VTR deck section 4 via this base 72. Reference numeral 73 denotes a locking member disposed corresponding to the lower part of the protruding piece 45 that protrudes downward from approximately the center of the lower edge of the right side plate 29 of the cassette holding portion 27 .

The long member 73 has a central portion having a substantially inverted triangular shape when viewed from the side, and is formed by a lock arm 74 rising upward from the front of the central portion and extending downward from a lower portion of the central portion. It is equipped with a long leg 75 and a long firm 74
At the upper end, there is a claw part 7 bent at a substantially right angle toward the front side.
6 is formed, and a hole 77 is formed at the lower part of the center part.
A pin 78 protruding from the base 72 is inserted into the base 72, so that the base 72 is rotatably supported. The front oblique edge 79 of the center portion of the locking member 73 formed in an inverted triangular shape is located 1 toward the stacked side from the center portion.
Two beveled edges 79a and 79 are bent in a substantially F-shape with a bending point 8o, and have different slope extension directions.
b is formed. Further, a long hole 81 extending in the vertical direction is formed in the lower part of the lock arm 74 of the lock member 73, and a protrusion 82 that projects outward is formed in the lower end of the right side edge of the leg 75. 83 is a tension spring, one end of which is engaged with the protrusion 82 formed at the lower end of the leg 75 of the locking member 73, and the other end of which is attached to the base 7.
The lock member 73 is engaged with a protrusion 84 protruding from the lower part near the front of the lock arm 73. energized. Note that a retaining ring 85 is fitted to the tip of the pin 78, and the locking member 7
3 is prevented from being removed from the pin 78 by this retaining ring 85.

Thus, the locking member 73 configured in this way can be operated by a switch operation member to be described later while the cassette holding portion 27 is not in the setting position 16.
4, the claw 76 at the upper end is held in a state (unlocked) displaced forward (to the right in FIG. 5), and when the cassette holding part 27 is pushed to the set position 1d, the claw 76 is The cassette holding part 27 is locked in the cell I position by engaging the upper side of the lock pin 48 provided on the holding part 27. It works like that.

Reference numeral 86 denotes a switch operating member disposed corresponding to the front side of the central portion of the locking member 73. The swing operation member 86 is formed in a substantially fan shape with a side edge on the tip side formed at a substantially right angle when viewed from the side. A hole 87 is formed in the protrusion.The switch operation member 86
Engagement pins 8 are located coaxially with each other and protrude in the horizontal force direction on both sides of the corner of the right-angled portion on the tip side.
8 and 89 are formed, and the retaining pin 89, which is protruded from the inside of the two retaining pins, is provided with the locking member 73.
A beveled edge 79 on the front side of the central portion of is abutted. Further, the upper part of the switch operation member 86 has a hole 9 for engaging a spring.
0 is formed, and a stopper pin 91 is provided to protrude inward from a position approximately in the center between the chain hole 90 and the base end. The switch operation member 86 has a hole 87 at the base end.
A pin 92 protruding from the base 72 is inserted into the base 72, so that the base 72 is rotatably supported. Reference numeral 93 denotes a retaining ring fitted to the tip of the pin 92, and the switch operating member 86 is prevented from being removed from the pin 92 by the retaining ring 93. Reference numeral 94 denotes a tension spring, one end of which is engaged with a protrusion 95 protruding from the front side of the base 72, and the other end thereof is engaged with the aforementioned hole 90 on the upper part of the swing operating member 86.

Therefore, the switch operating member 86 is biased with a rotational force such that the - tip side is displaced upward by the tensile force of the spring 94, but the rotation of the switch operating member 86 due to the tensile force of the spring 94 is ''-The stopper bin 91 is stopped when it comes into contact with an engagement edge 96 formed in an upright manner on the front side of the base 72. Then, the switch operation member 86 is moved to the position where the per pin 91 is in contact with the engagement edge 96 of the base 72 (hereinafter referred to as
When in this position (referred to as the first position), the engagement pin 89 protruding inward from the tip side corner of the swift operation member 86 engages with the upper beveled edge 79a of the beveled edge 79 of the locking member 73. In this state, the upper oblique edge 79a of the lock member 73 is supported by the engagement pin 89 of the switch operating member 86, so that the upper end of the lock arm 74 is displaced forward. state, ie, in the unlocked position.

The action of holding the link member 73 in the unlocked position by the switch operating member 86 is shown in FIG.
Explain. 9iJJ9 Is the shape 7ffl shown by the solid line in the figure locked? ? 8 shows a state in which the blade 73 is held in the unlocked position by the switch operating member 86. In this state, as described above, the switch operating member 86 is rotated by the tensile force of the spring 94 until the stopper pin 91 comes into contact with the engagement edge 9B of the base 72, that is, the first position. in position 8 above the lock BB material 73
8 beveled edge 79a abuts against engagement pin 89 of switch operating member 86. Even in this state, the locking member 73 is subject to the rotational force exerted by the spring 83, that is, the rotation force 74 is applied to the locking member 73.
The claw portion 76 of the
The locking member 73 is biased downward by a rotational force such that it is displaced.
is prevented from being rotated in such a direction. In other words, in this state, the moment of rotation force applied to the link member 73 causes the upper beveled edge 79a to move toward the engagement pin 8.
Switch operation member 8 via the part that is in contact with 9
6, and the direction of the moment is in the direction shown by the solid arrow in the same figure, that is, from the part where the upper 8Il edge 79a is in contact with the engagement pin 89, the switch operation 88 member 86
The axis of pin 92 on which is supported? 11 (or toward the upper part of the axis. In other words, the moment of the rotational force applied to the locking member 73 in this state S causes the switch operation. The direction of action on the member 86 is such that the swift operation member 86 is pressed against the pin 92;
Alternatively, the direction is such that the switch operation member 86 is rotated so that its tip side is displaced upward, and even if it is subjected to such a moment, the switch operation a++ member 86 will not move from this state. It is prevented from moving at all (by being pressed against the hole 87 or the pin 92, or by being brought into contact with the male stopper pin 91 or the engaging edge 96 of the base). Therefore,
The port/link member 73 is held in the unlocked position by the switch operating member 86 against the tensile force of the spring 83.

Reference numeral 97 is a first switch incorporated in the locking mechanism 71, and this switch 97 is a switch provided to detect that the cassette holding s1+ 27 is locked at a predetermined cent position. It is disposed below the switch operating member 86 and fixed to the side surface of the base 72. Reference numeral 98 designates an operating piece of the switch 97, the tip of which is in contact with the lower edge of the switch operating member 86 at 94. Then, the switch operation member 86
operates the switch 97 from the first position 1ξ(
While being rotated to the position (hereinafter referred to as position 82), the tip mjl of the operating piece 98 is pressed by the lower edge of the switch operating member 86, thereby closing the contact of the switch 97. In addition, the switch operating member is
When the operating piece 98 is returned from the position to the first position, the tip of the operating piece 98 returns upward, thereby opening the contact of the switch 97. That is, when the switch operating member 86 is in the first position, which holds the locking member 73 in the unlocked position, the switch 97 maintains its contacts in an open state.

When the cassette holding part 27 is pushed toward the set position 4 from the state indicated by the solid line in FIGS. 5 and 9, the switch operation member 86 is The engagement pin 89 is connected to the lower beveled edge 7 of the locking member 73.
9b, the locking member 73 is thereby rotated so as to press the cassette holder switch operating member 86, and the contact of the switch 97 is closed.

The operation of each member will be explained in detail with reference to FIG. 9. The state shown by the solid line in FIG. 9 (the switch operating member 86 is in the first position, the locking member 73 is in the switch operating position
It is kept in the unlocked position t5 by the HB material 86, and
When the cassette holder 27 is pushed in with the first switch 97 opening its contacts, the protrusion 45 of the cassette holder 27 is lowered through the outside of the long RS++ material 73, and first the cassette holder 27 is pushed in. Lock pin 48 protruding from piece 45
causes the lock portion 4ia 3 to rotate slightly in the direction indicated by arrow 99 in IA. This is because the lock pin 48 is moved while successively abutting the two-part oblique edge and the tip edge of the claw portion 76 of the lock member 73. At this time, the two-part beveled edge 79a of the locking member 73 on the central hair 11j side temporarily leaves contact with the engagement pin 89 of the switch operating member 86. Then, at a position where the lock pin 48 is no longer in contact with the claw portion 76 of the lock member 73, that is, when the upper surface of the lock pin 48 has been lowered to a height corresponding to the lower retaining edge 100 of the claw portion 76, Or in front of the other party, the lower edge 46 of the protruding piece 45
abuts against the retaining pin 88 on the outside of the switch operating member 86. At this point, the locking member 73 is rotated in the opposite direction of the arrow 99 by the tensile force of the spring 83, since the claw portion 76 and the locking pin 48 are no longer in contact with each other, and the lower peeling edge 79b of the locking member 73 is rotated in the opposite direction of the arrow 99. 86 and is brought into contact with the engagement pin 89 .

When the cassette holding part 27 is further pushed in, the locking of the cassette holding part 27 by the locking member 73 is completed and the contact of the switch 97 is closed. That is, the switch operation member 86 is rotated so that its distal end side is displaced downward when the retaining pin 88 on the outside thereof is pressed by the lower end edge 46 of the protruding piece 45 of the cassette holder 27, and the retaining pin 89 crosses over the bending point 80 from the position where it engages with the 41 edge 79a of the locking member 73 to the lower beveled edge 79
b is moved to a position where it engages with b. The engagement pin 89 of the switch jN/actuating member 86 is connected to the lock member 73 by 1° door 13.
When engaged with the barbed edge 79b, the direction of the moment applied to the locking member 73 changes.

At this time, the direction in which the moment of the rotational force of the old long part 73 acts on the switch operating member 86 is the direction shown by the two-dot chain arrow in the same figure, that is, the direction between the engagement pin 89 and the lower oblique 1k.
79b is the force directed downward from the pin 92 supported by the switch imitation member 86.

Therefore, the direction in which the rotational force of the mouth/ink member 73 acts on the switch operating member 86 at this time is the direction in which the switch operating member 86 is rotated toward the second position 1δ.

Here, the locking member 73 locks the switch operating member 86 into the second position.
This causes the switch 97 to be operated and the switch/operating member 86 to be held in the second position. At the same time, the lower part of the claw B676 engages ik1. OO or engages with lock pin 48°
Lock the cassette holding section 27.

In this embodiment, as described above, the lower edge 46 of the projecting piece 45 of the cassette holding part 27 is connected to the switch operating member 8.
6 was set as the point in time when the cassette holding part 27 was pushed to the set position, that is, the point in time when the lock pin 48 was pushed in to the position where it could be locked by the locking member 73. However, in the present invention, It is not necessary to define the operation timing of each member in this manner. The operation timing required in this invention is as follows.
It is sufficient that the cassette holder 27 be pushed to a position where it can be locked by the lock member 73 at the time when the end operating member 86 is engaged with the lower beveled edge 79b of the lock member 73. This is because when the switch operating member 86 is engaged with the lower beveled edge 79b of the locking member 73, the locking member 73 is necessarily rotated in the locking direction.
As a result, the center holding portion 27 by the locking member 73
This is because the locking and operation of the switch by the switch operation member 86 can be executed reliably.

Reference numeral 101 is a slider for releasing the long length of the cassette holding section 27 by the long member 73. The slider 101 has a kite 102 formed in its longitudinal center and a guide groove 103 formed in its front end.
05, and is slidably supported by the base 72. A pin 106 is provided protruding inside the front end of the slider 101.
06 is engaged with the elongated hole 81 of the locking member 73, whereby the slider 101 is connected to the long member 73. Reference numeral 107 denotes a protrusion protruding from the two-ring edge of the slider 101, and this protrusion 107 is associated with a release mechanism to be described later.
When the eject button for taking out the l is operated, the long release mechanism described in - is operated, and the release mechanism is also operated)', so that the protrusion 107 moves to the front brake (see Figs. 5 and 6).
It is configured so that it can be moved toward the right side in the figure. When the slider 107 is moved forward from the state shown by the solid line in FIG. 6 and the double-dotted dashed line in FIG. By being pulled by 106,
The upper part of the mouth/link arm 74 is rotated so as to be displaced forward. Then, the engaging edge 1 of the claw portion 76 of the locking member 73
The cassette holding part 27 is released from the engagement with the locking pin 48, and the cassette holding part 27 is unlocked by the locking member 73, so that it floats to the removal position 1L. Also, at the same time as the long member 73 is rotated as shown in Figure 2, the switch operating member 86 is
The state in which the switch is operated is released, and the tensioning force of the spring 94 causes the switch to be rotated to a position 115 shown by a solid line in FIG. 9, that is, to the first position. When this is done, the release operation for the slider 101 is released. Then, the locking member 73 is rotated by the tensile force of the splinter 83, but in addition, ΔB#i&f'9a is engaged with the engaging pin 89 inside the switch operating member 86, and is held in the non-snatched state again. be done.

Reference numeral 108 denotes a second switch built into the locking mechanism 71, and this switch 108 is a switch for detecting that the tape force setting 11 is installed in the cassette housing 11 section 27. Yes, in front of Hesfu 2 1"
It is attached to i3. 109 is an operating piece of the switch 108.

110 is a slider that presses the operating piece 109 of the swing 108. The slider 110 has grooves 111 and 112 formed on its front side and front side, respectively, and a protrusion 110a extending downward from the end of the slider 110.
An engaging protrusion 113 bent outward is formed on the front side of the lower end *116, and a protrusion 114 protruding outward is formed on the lower edge of the protruding position on the front side. . In addition, the kite 11η in the front part of the slider 110
A pressing piece 115a bent outward is formed at the tip of the lower piece 115 of the fork-shaped portion due to the formation of the pressing piece 112.

116 is a lever formed in an inverted letter shape.

A hole 117 is formed in the bent portion of the lever 116, and
The tip 1 of the upper piece 116a has a pin 1 protruding from the inner blade.
18, and a small hole 19 is formed at the tip of the lower piece 116b. Reference numeral 120 designates a pin that projects inward from a position close to the slightly distal end of the lower piece 116b of the lever 116.

121 is a detection pin. The detection pin 121 is configured such that when a tape cassette I is mounted in the cassette holding part 27, its two wheels are pushed downward by being pressed by, for example, the bottom surface of the case of the tape cassette 11. I'm here. The detection pin 121 is supported so as to be movable downward by a guide provided at its center or base 72, and a hole 123 is formed in the lower part 9116, and the detection pin 121 is inserted into the chain hole 123 of the lever 116. A pin 118 protruding from the tip of the upper piece 116a is inserted into the upper piece 116a, thereby rotatably connecting it to the tip of the upper piece 116a of the lever 116. The pin 104 protrudes from the base 72 into the hole 117 of the bent portion of the lever 116.
is rotatably supported by the base 72 by being fitted and inserted. Further, the guide groove 111 on the front side of the slider 110 is slidably engaged between the lock member 73 of the pin 78 and the ring 85, and the guide groove 111 on the front side
2 is engaged with a pin 120 protruding from the lower piece 116b of the lever 116, and is slidably supported by the base 72, and is connected to the protrusion 114 and the hole 119 at the tip of the lower piece 116b of the lever 116. The slider 110 is connected to the lever 116 by tensioning the tension restring 124 between them. Note that a protrusion 113 provided at the lower part of the front edge of the slider 110 is connected to the locking member 73.
The front side of the leg 75 is faced.

Reference numeral 125 denotes a guide supported by the base 72, and the upper edge of the front lower piece 115 of the slider 110 is slidably engaged with the lower surface of the chi l'l 25, and the front part of the slider 11O is connected to the guide. 125 to allow stable sliding movement.

Thus, the cassette holding section 27 with the tape cassette 11 attached thereto is shown in FIG. When the second switch 108 is pushed in from the open position, the operating piece 109 of the second switch 108 is pushed in the direction of operating the switch 108 via the detection pin 121, lever 116, and slider 110, thereby causing the contacts of the switch 108 to open. Closed. That is, when the cassette holder 27 is pushed in, the detection pin 12 first
1 is pushed downward by the tape cassette ll, the tip of the upper piece 116a of the lever 116 is accordingly displaced downward, and the lever 116 is rotated counterclockwise in FIGS. 5 and 6. Then lever 1
The tip of the lower piece 116b of 16 is displaced forward, and the tensile force of the spring 124 is increased.
4 to the slider 110, and the slider 1
10 is moved forward, the pressing piece 115a of the lower front piece 115 of the slider 110 presses the switch operation piece 109, and the contact of the switch 108 is closed (the state shown in FIG. 6). When the long member 73 starts unlocking the cassette holding part 27 from the state shown in the figure, the long member 73 is rotated so that the upper part is displaced to the front as described above, and the locking member The leg 75 of 73 is rotated so that its lower end is displaced toward the front. Then, the slider 110 moves to that hand 11'
l'): Protrusion 113 of protrusion 110a formed in iA
is pressed toward the front side by the front edge of the leg 75 of the mouth/ink member 73, and thereby is moved toward the front side while pulling the spring 124. With this, slider 11
0 releases the pressure on the operating piece 109 of the switch 108, and also activates the turning force in the clockwise direction of the lever 116i:J, 1. When the locking member 73 completes the release of the long lock on the cassette holding part 27, the cassette holding part 27 is floated toward the ejecting position and moved clockwise by the tensile force of the lever 116 or the spring 124. The detection pin 121 is rotated, thereby pushing the detection pin 121 upward (returning to the state shown in FIG. 5).

In this embodiment, the first switch 1. The switch 97 and the second switch 108 constitute an AND condition for driving the drive circuit that drives the tape loading mechanism, and the drive circuit operates when the two contacts of both switches 97 and 108 are both closed. The tape loading operation is configured to initiate a tape loading operation.

Reference numeral 126 denotes a drum base fixed at a W-shaped position in front of the chassis 16. A drum mounting portion 127 having a substantially circular planar shape is formed in the center of the drum base 126. Guide end portions 128 and 129 are formed on both sides of the lower portion of the portion 127, each having a step in height from the chassis 16. Guide grooves 130 and 131 are formed in the guide ends 128 and 129 in an arcuate manner, and the surface of the left guide end 129 is closer to the chassis 16 than the surface of the right guide end 128. It is formed with a high height.

132 is a rotating drum, which is equipped with a video head (not shown). The rotating drum 132 is connected to the drum base 12.
It is rotatably supported on the drum mounting portion 127 of No. 6. The upper end edge of the phrase part 127 of the drum base 126 is slightly inclined to the right so that the right force approaches the chassis 16, so that the rotation axis of the rotating drum 132 is aligned with the chassis 16 surface. It is set slightly tilted to the right with respect to the vertical direction.

133 is a loading ring formed in an annular shape, and another loading ring, which will be described later, is provided below this loading ring 133, that is, on the chassis 16 side. It is rotatably supported by the chassis 16 by being engaged with three rollers 134, 134 and 134 rotatably supported on the upper surface. The upper loading ring 133 and the lower loading ring are rotated in opposite directions.

135 and 136 are tape guide blocks, respectively. One guide block 135 has a guide post 13
7 and 138 are erected, and are attached to the two-part loading ring 133 so as to be moved integrally with the upper loading ring 133. The other side block 136 is connected to the lower loading ring via a connecting member (not shown), and is moved as the lower loading ring rotates.

The guide block 136 includes a guide post 13.
9 and 140 are erected.

The guide post 140 is erected at an angle with respect to the guide block 136.

A pair of guide members 141 and 142 guide the movement of the other guide block 136. The guide members 141 and 142 are each formed into a substantially semicircular shape, and rotate clockwise from the substantially left half of the outer circumferential edge of the upper loading ring 133, that is, from the near side of the outer circumferential edge of the upper loading ring 133. The height of the two sides, that is, the height from the chassis 16 surface is from the base end on the front side to the front end of the chassis. The height from the chassis 16 gradually increases toward the bottom. And guide members 141 and 142
are arranged apart from each other to form an arcuate guide groove 143 between them, and the guide groove 14
3 is continuous with the guide groove 131 of the guide end 129 provided on the front left side of the drum base 126.

144 is a drive mechanism disposed near the lower edge of the chassis 16, and is equipped with power transmission members such as a motor, a belt, and a pulley, and the loading ring is rotationally driven by this drive mechanism 144. It looks like this.

Therefore, when the one-part loading ring 133 is rotated counterclockwise from the state shown in FIG. A pin (not shown) protruding from the lower part of the guide block 135 is moved to the right guide end 128 of the drum base 126.
The movement is stopped when it collides with the tip edge of the guide groove 130 formed in the guide groove 130 (the state shown by the two-dot chain line in the figure).
. At the same time, the lower loading ring is rotated clockwise, and the other guide block 136 has a pin (not shown) protruding from the lower part of the guide member 141, 142.
The guide block 136 is moved forward around the outside of the rotating drum 132 while being guided by the guide groove 143 formed by the drum base 126, and the pin (not shown) of the guide block 136 is formed at the front guide end 129 of the drum base 126. The movement is stopped when it collides with the leading edge of the guide groove 131 (the state shown by the two-dot chain line in the figure).

Therefore, when the tape force set hll is set at the set position, the tape path of the magnetic tape 12 is as shown by the thick two-dot chain line in FIG. Since it is located on the inside, from this state the force id broncs 135 and 13
6 is moved as described above, the magnetic tape 1
2 is pulled out from inside the tape force center 11 by each guide post 1-137, 138 and 139, 140 of each guide block 135 and 136, and is wound around the outer peripheral surface of the rotating drum 132 at a predetermined angle.

A slider 145 is slidably disposed on the chassis 16, and is composed of an elongated plate-shaped base plate 1-146 and an oscillator 147 that swings in response to the sliding of the base plate 146 with respect to the chassis 16. Become.

Two elongated holes 148 and 149 are formed in series in the base plate 146 along its longitudinal direction. By being movably engaged, the base plate 146 is slidably supported with respect to the chassis 16. The left end of the base plate 146 is raised upward at a substantially right angle, and the front end of the raised edge projects further toward the front side than the front edge of the base plate 146, and the projecting portion 152 is considered to be the attachment piece. 153 is a pin installed on the chassis 16 in front of the base play 1-146;
A tension coil spring 154 is tensioned between 53 and the engagement piece 152 of the base plate 146. Therefore, when no external force is applied, the base plate h146 is biased in the direction of moving to the right, and the elongated hole 148
The left ends of the guide pins 150 and 151 are in contact with the guide pins 150 and 151.

The rocker 147 is rotatably supported by the pin 151 at its base end. Further, a protrusion 155 is integrally formed at the tip thereof, and an elongated hole 156 is further formed at an intermediate position between the protrusion 15'5 and the rotation fulcrum.

Reference numeral 157 denotes a pin erected on the base plate 146, and the pin 157 is slidably engaged with the elongated hole 156 of the rocker 147. Therefore, the rocker 147 is rotated by the movement of the base plate 146. That is, when the base plate 146 is slid to the right, the rocker 147 is rotated counterclockwise, and when the base plate 146 is slid to the left, the rocker 147 is rotated counterclockwise.
47 is rotated clockwise. During the rotation of the rocker 147, the protrusion 155 is projected from the front edge of the base plate 146.

Reference numeral 158 denotes an actuator, the middle portion of which is rotatably supported by the chassis 16 by a pin 159. Actuator 1
The center of rotation of the slider 58 is located approximately at the midpoint between the base end of the base plate 146 of the slider 145 and the front side of the loading ring 133. The actuator 158 has arm pieces 160 extending in opposite directions from its rotation center.
161 are integrally formed, and the tip of the arm piece 160 on the front side extends to the sliding locus of the loading ring 133. Further, the tip of the arm piece 161 on the near side extends further to the near side from the near side edge of the base end portion of the base plate 1146 of the slider 145, and a retaining piece 162 is formed at the tip. The engagement piece 16
The claw 162a formed at the tip of the base play 1-1
It is engaged with the right side surface of the engagement piece 152 at the end of 46i.

Reference numeral 163 denotes a lower loading ring disposed below and concentrically with the upper loading ring 133, and a pin 164 is fixed to the lower surface of the lower loading ring 163. During tape unloading, the lower loading ring 163 is rotated counterclockwise, and shortly before the rotation ends, it comes into contact with the left side of the arm piece 160 of the actuator 158, and until the lower loading ring 163 stops. The interlocker 158 is rotated clockwise.

When the actuator 158 is rotated clockwise by being pushed by the arm piece 160 or the pin 164, the tip of the other arm piece 161 moves approximately to the left, and therefore the retaining piece 162 also moves. Move to the left. Therefore, the engagement piece 162
The claw piece 162a is the engaging piece 152 of the base plate 146.
base plate 1 because it acts to pull it to the left.
46 is moved to the left against the tensile force of the coil spring 154. When the base plate 146 is moved to the left, the oscillator 147 rotatably supported by the pin 151 on the chassis 16 is pulled to the left by the elongated hole 156 or the pin 157 on the pace plate 146. , rotate clockwise to the position shown in FIG. 11(C).

When the lower loading ring 163 is rotated in the tape loading direction, that is, in the clockwise direction, the actuator 158
Since the pin 164 that was pressing the arm piece 160 of the base plate 146 moves away from the pressing force, the base play 1 146 is moved to the right by the tensile force of the coil spring 154. When the base plate 146 is moved to the right side, the rocker 147 is rotated counterclockwise to the position shown in FIG. 11(E).

Reference numeral 165 denotes an intermediate member, which is formed in an abbreviated shape.

The intermediate member 165 has a central bent portion that is connected to the chassis 16''-
It is rotatably supported with respect to the chassis 16 by a pin 166 provided upright. The tip of one of the two arm pieces 167 and 168 of the intermediate member 165 that extends toward the front is brought close to the front side edge of the base plate 1° 46 of the slider 145. Moreover, the shape of the tip is triangular with a slightly rounded apex.

The other arm of the intermediate member 165 extends approximately to the right and is located in front of the protrusion 107 of the slider 101.

Reference numeral 169 denotes an engagement piece protruding from the outside of the bent portion of the intermediate member 165, and a tension coil spring 17 is inserted between the engagement piece 169 and a pin 170 erected on the chassis 16.
1 is stretched. Therefore, this coil spring 1
Since the outside of the bent portion is pulled by the tensile force of 71, when no other force is applied, the intermediate member 1
65 is maintained in the neutral state shown in FIG. It can be rotated clockwise or counterclockwise depending on the direction.

Next, the mutual movement relationship between the slider 145, the intermediate member 165, and the protrusion 107 of the slider 101 will be explained with reference to FIG.

FIG. 11(A) shows a state during recording, playback, or tape loading, and the intermediate member 165 is in a neutral state. In addition, the slider 145 is pulled by the coil spring 154, and each elongated hole 148.1 of the base plate 146
The left end of the pin 49 is aligned with the pins 150 and 151, that is, it is closest to the right end. In this state, the oscillator 147 is at its most rightward position, and its protrusion 155 is located to the right side of the tip of the arm piece 167 of the intermediate member 165. It is in an IF state. Further, the front edge of the other arm piece 168 of the intermediate member 165 is in contact with the front end of the projecting piece 107 of the slider lot.

At the end of the tape unloading operation, when the actuator 158 is rotated clockwise by the pin 164 of the lower loading ring 163, the actuator 158
The slider 145 is pulled by the engaging piece 162 (against the tensile force of the coil spring 154) and begins to move to the left.

Then, in this process, the oscillator 147 is rotated clockwise, so that the protrusion 155 at the tip of the oscillator 147 touches the intermediate member 1.
65 arm piece 167 (see figure 811 (B))
, and in order to press this to the left, the intermediate member 165 is rotated counterclockwise (see FIGS. 11(B) and 11(C)). When the intermediate member 165 is rotated counterclockwise, the arm piece 168 presses the protruding piece 107 of the slider 101 forward to move it forward (see FIGS. 11(B) and (C)). ). When the protruding piece 107 and therefore the slider 101 are moved forward, the locked state to the cassette holding portion 27 is released as described above.

The rocker 147 rotates clockwise, and the intermediate member 165
are rotated counterclockwise so that their tips point to the left, their tips move away from each other, so that the projection 15 at the tip of the W mover 147 finally
5 passes over the tip of the arm piece 167 of the intermediate member 165 and comes to the left side thereof (FIG. 11(C) shows the state at that moment). Then, the force pressing the tip of the arm piece 167 to the left is removed, and the intermediate member 165 is rotated clockwise by the tensile force of the coil spring 171 to return to the neutral state described above. When the intermediate member 165 returns to the neutral state, the force pressing the protrusion 107 forward is removed, and the slider 101 is slid toward the front by the force of the coil spring 83 indirectly received.

Next, when loading the tape, the lower loading ring 163 rotates clockwise, and the arm piece 1 of the actuator 158
When the pin 164 that was pressing the coil spring 60 to the right moves to the left, the base plate 146 is pressed against the coil spring 15.
Accordingly, the oscillator 147 rotates counterclockwise, and the protrusion 155 at the tip presses the tip of the arm piece 167 of the intermediate member 165 to the right. Therefore, the intermediate member 165 is rotated clockwise (see FIG. 11(D)).

The rocker 147 rotates counterclockwise, and the intermediate member 16
5 are rotated clockwise so that their tips point to the right, their tips move away from each other, so that the projection 15 at the tip of the rocker 147
5 climbs over the tip of the arm piece 167 of the intermediate member 165 and comes to the right side thereof (FIG. 11(E) shows the state at that moment). Then, the force pressing the tip of the arm piece 167 to the right is removed, and the intermediate member 165 is rotated counterclockwise by the tensile force of the coil spring 171, returning to the neutral state described above. (See Mtt diagram (A).) When the base plate 146 of the slider 145 moves to the right, the movement of the slider 146 and the intermediate member 165 has no effect on the locking mechanism of the cassette holding section 27.

Effects of the Invention As is clear from the above description, the cassette holder lock release mechanism in the magnetic tape device of the present invention has the following features:
A lock release member that moves the lock member that locks the cassette holding part in a predetermined set position in the unlock direction; and a slider that is moved in one direction during tape loading and moved in the other direction opposite to the one direction when tape is unloaded. , when the slider moves in the one direction, engages with the intermediate member to rotate it toward the second position, and when the slider moves in the other direction, engages with the intermediate member. and rotate this to the first position, and when the intermediate member is rotated to the first and second positions, it is disengaged from the slider and returned to the intermediate position between the shoulder positions. It is characterized by the following.

Therefore, according to the present invention, the movement of the member that moves during tape loading and tape unloading can be detected without using a unique drive source for unlocking the cassette holder. By indirectly using the driving force of the drive source for unloading to perform the unlocking operation of the cassette holder, the device can be made smaller and lighter, and the cassette holder can be unlocked. It is possible to provide a novel cassette holder unlocking mechanism in a magnetic tape device that allows reliable operation by making all the movements of the respective members two-dimensional.

[Brief explanation of the drawing]

The drawings show an example of an embodiment in which the cassette holder lock release mechanism of a magnetic tape device according to the present invention is applied to a cassette holder lock release mechanism of a video camera in which a VTR deck is integrally incorporated. Fig. 2 is a plan view showing the main parts of the VTR electronics, Fig. 3 is a perspective view of the cassette holding mechanism, and Fig. 4 is a horizontal cross-section of the cassette holding mechanism. Figures 5 to fiS9 show the cassette holder locking mechanism, Fig. 5 is a side view of the cassette holder in the floating position, and Fig. 6 is a side view of the cassette holder in the set position. Side view, Figure 7 is A- in Figure 6.
FIG. 8 is an exploded perspective view of the main parts; FIG. 9 is an enlarged side view showing the operation of the main parts; FIGS. io and 11 show the lock release mechanism; FIG. 10 is a plan view of the main part, and FIG. 11 is a plan view of the main part for explaining the operation. Explanation of symbols 27...Cassette holding part, 101...Lock release member, 1451...Slider, 165...Bag intermediate member

Claims (1)

[Claims] a lock release member that moves the cassette holding part to a predetermined set position and a lock release member that moves the lock member to the lock release operation;
an intermediate member that moves the long release member in the unlocking direction when the long release member is rotated to the position; and an intermediate member that moves in one direction during tape loading and moves in the other direction opposite to the one direction during tape unloading. a slider that is moved, and when the slider moves in the direction of the plastic, it engages with the intermediate member and moves it to the second
When the slider moves in the direction of the external force, the intermediate member is engaged with the intermediate member to rotate it toward the first position, and the intermediate member is rotated toward the first and second positions. A cassette holder lock release mechanism in a magnetic tape device, characterized in that when the cassette holder is rotated to the position, the cassette holder is disengaged from the slider and returned to the intermediate position of the self position.