JPH0724134B2 - Tape Producing Equipment - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to tape loading of a recording / reproducing apparatus for recording or reproducing by winding a tape around a guide drum containing a transducer such as a VTR.

2. Description of the Related Art A conventional tape loading device of this type is disclosed in
As shown in Japanese Patent No. 59-171070, it had the structure shown in FIG.

The tape 103 pulled out from the supply reel 102 of the tape cassette 101 is wound around the guide drum 104 via the guide posts and the erase head by 221 °. The tape 103 exiting the guide drum 104 reaches the take-up reel 106 via the capstan 105. In this conventional example, in order to miniaturize the device, the tape cassette 101 can be slid with respect to the guide drum 104 together with a reel drive mechanism (not shown), and the guide drum 104 is finally opened in the opening portion of the tape cassette 101. It proposes an overlap method of the guide drum 104 and the tape cassette 101 that have entered the 101a.

Another well-known approach to miniaturization is the technique for miniaturizing the guide drum, which is well known in the past. This corresponds to the VHS video standard system shown in FIG.
As shown in the figure, it is called "VHS video movie" of a small guide drum 107 in which the diameter of the standard guide drum 110 is reduced to 2/3 by using 4 heads (A, B, A ', B'heads). It is something that will be done. FIG. 55 shows a deep pattern for explaining that both guide drums are completely compatible. For the small-diameter guide drum 107, the tape winding angle guide drum rotation speed is 3/2 times that of the standard guide drum 110.
As is well known. When this technology is applied to "8 mm video", the specifications are as shown in Fig. 56.

Standard guide drum 104 …… 40mm diameter, 2 heads, 1800rp
m, wrapping angle 221 ° (video part 180 ° + PCM audio part 30 ° + other 11 °) Small diameter guide drum 60 …… 26.7 mm diameter, 4 heads, 2700r
pm, wrapping angle 331.5 ° This is the smallest system that can be considered at present that incorporates both the guide drum and tape cassette overlap method of this guide drum miniaturization technology. One example is shown in FIG. A small diameter guide drum 6 in the opening of the tape cassette 101.
It is an example of a tape loading device in which 0 is arranged and the winding angle of the tape is 331.5 °. This FIG. 57 is the limit of the mechanism that can be considered using the 8 mm tape cassette 101.

Problems to be Solved by the Invention Although the tape loading device shown in FIG. 57 is technically an extremely small size, from the user's point of view, it is obvious that the tape loading device should be lighter and smaller than an audio cassette headphone stereo. To be In the case of headphone stereos, the size and weight of the audio cassette were eventually reduced to a large size, which has become a major driving force for its widespread use. If the 8mm VTR is also considered to be used outdoors, the size of the cassette should be targeted as the final target of these small and light weights. However, in VTR, the tape loading mechanism centering on the guide drum is extremely complicated and occupies space compared to the audio deck,
It was very difficult.

Means for Solving the Problems In order to solve the above problems, the tape loading device centering on the guide drum can be driven with respect to the tape driving device in which the tape cassette is mounted. The guide drum, which is the center of the tape loading device, has a first position facing the cassette reel with the tape stretched in front of the tape cassette, a second position inside the opening of the tape cassette, and a position inside the opening. It is configured to be movable to three positions, which are the third position closer to the cassette reel than the position.

In this way, before loading the tape, the guide drum is at the first position, and when the tape cassette is stored in the cassette holder and the cassette holder is attached to the main body of the apparatus, the guide drum moves from the first position to the second position. After moving to the position, the tape loading operation is completed and a predetermined tape path is obtained. When the cassette holder is mounted on the apparatus main body without accommodating the tape cassette in the cassette holder, the guide drum moves from the first position to the second position and then to the third position. As a result, except when recording / reproducing is performed by the tape cassette device, the tape loading mounting centering on the guide drum is almost entirely absorbed in the space occupied by the tape cassette in a plane, so that the final target tape cassette is loaded. Can achieve size.

Example The structure of the tape cassette of 8 mm standard used in this example will be described with reference to FIGS. 2 to 12.

FIG. 2 is a perspective view of the tape cassette 1 as viewed from above.
When not in use, the tape 4'is wound around a pair of built-in reels 2 and 3 (FIG. 4), and the tape 4'is covered by a rotatable front lid 5 and back lid 6, respectively. In FIG. 4, 7 is an opening for inserting a post or the like to pull out the tape 4 ′ stretched on the front surface, and 8 is a reel lock for preventing the slack of the tape 4. Information such as the thickness, type, and length of the tape 4 is expressed in the information window 9 depending on whether the hole is opened or closed. Reference numeral 10 is a positioning hole for positioning the tape cassette 1 in the main body device. Reference numeral 11 is a sensor hole into which a light emitting element for transmitting the start / end information of the tape 4 is inserted. This light emitting element forms an optical path in the directions of arrows 12 and 13, and is provided with a light receiving element on the facing surface, which is not shown.

6 to 8 show details of the opening / closing operation of the front lid 5 and the back lid 6 in cross-sectional views. The front lid 5 is rotatably supported at both front side ends of the tape cassette 1. Reference numeral 5 is a support shaft that serves as the center of rotation of the front cover 5, and reference numeral 5'is an arm that supports the support shaft 6'of the rear cover 6 in a rotatable manner. The back cover 6 has a protrusion 6 ″, and this protrusion 6 ″ engages with a guide groove 14 formed on a side wall 7 ′ of the opening 7 of the tape cassette 1. The lid mechanism having the above structure is urged by the elastic member in the state shown in FIG.
The locus of lid opening and closing is depicted in Fig. 8 and Fig. 8. At this time, the back cover 6 adopts a guide method of the back cover 6 by the guide groove 14 for the purpose of smoothly opening and closing without touching the tape 4'included therein.

9 and 10 are views in the vicinity of the left side surface 5 ″ of the front lid 5 in FIG. 2, which are detailed views of the lid locking mechanism of the front lid 5 and the back lid 6 described above. It is possible to rotate about the support shaft 5 to a position indicated by a chain double-dashed line, but a protrusion piece 15 formed on the left side surface 5 ″ of the front lid 5 in the vicinity of the support shaft 5 rotates about the claw support point 16. The front lid 5 is prevented from rotating, engaging with one end of the lid lock claw 17 to be obtained. When the projection enters along the hatching portion 18 'in FIG. 10 and the direction of arrow 18 in FIG. 9, it hits the release piece 17' of the lid locking pawl 17 which is urged clockwise by an elastic member (not shown). Contact and rotate the lid lock claw counterclockwise. As a result, the front lid 5 is unlocked and can be opened and closed. The square hole 19 provided on the left side surface 5 ″ of the front lid 5 forms the optical path 12 of the light emitting element shown in FIG. 4 when the front lid 5 is open. The optical path is closed by the left side surface 5 ″ of the lid 5. Of course, since the tape cassette 1 is almost symmetrical, it has the same left and right functions including blocking and opening of the optical path. However, there is only one lid lock mechanism.

11 and 12 are perspective views showing an example of the lid opening / closing operation.
In FIG. 1, the unlocking piece 17 'of the lid lock claw 17 is rotated counterclockwise by the slide plate 20 and the slide pin 21 to unlock the lid.

Further, FIG. 12 shows a state in which the front lid 5 and the back lid 6 are released by the lid opening pin 22 provided on the main body side.

For such a tape cassette 1, the guide drum 60 is
As shown in FIG. 1, it is configured to be movable to three positions C1, C2 and C3. The position of C1 is a position before tape loading, and at this time, although not shown, a plurality of tape pull-out posts are housed in the opening 7 of the tape cassette 1.
The position of C2 is the position where the tape loading is completed, and the tape is wound around the guide drum 60 by a predetermined angle to enable recording and reproduction. The position of C3 is the position of the guide drum when the tape cassette 1 is not attached to the main body, and it is absorbed in the space occupied by the tape cassette 1 in plan view beyond the opening 7 of the tape cassette 1. FIG. 13 shows a state where the tape is wound around the guide drum 60 at a position C2 by a predetermined angle.
The tape 4 delivered from the supply reel 2 reaches the guide drum 60 via the S1 post 31, the S2 post 33, the S3 post 34, the tension post 32, the erase head 58, etc., which are rotating posts.

The guide drum 60 is inclined in the A direction by the lead angle. Since the A direction is parallel to the tape stretched between the S3 post 34 and the guide drum 60, all the tape guide members between the S ₁ post 31 and the S ₄ post 34 including the erase head 58 are all cassettes. Perpendicular to the bottom. On the guide drum 60
The tape wound around 331.5 ° is the T1 post 35, T2 of the rotating post.
The post 36, the T3 post 37, and the fixed post 55 guide the inclined guide post 53. In this, the fixed post
Unlike the other rotating posts, the 55 is formed by winding the tape in a helical shape, so the twisting condition of the tape changes before and after the fixed post 55. Therefore, the tape 4a stretched between the guide drum 60-T1 post 35-fixing post 55, and the fixing post 55-T2 post 36-T3 post 37-
The tape 4b stretched between the inclined guide posts 53 has different twisting conditions. Reference numeral 53 is an inclined guide post for eliminating the set twist according to the twist condition of the tape 4b. The tape 4c emitting from this inclined guide post 53 is released from the twist and runs on the same plane as the tape in the cassette. It is a tape that does. Subsequent rotating post T4 post 38, T
The 5 post 39, the capstan 59, and the pinch roller 30 are formed vertically to the bottom surface of the cassette, like the table guide member on the supply reel 2 side. FIG. 14 is a layout diagram of main components of the tape loading device when the tape cassette 19 is not mounted. Guide drum 60, S3 post 3
4, T1 post 35, T2 post 36, T3 post 37, fixed post 55, inclined guide post 53 move from the state of FIG. 13 by the length of “L” shown in FIG. 1, that is, from C2 to C3. ing. The other posts 31, 32, 33, 38, 39, the erase head 58, the pinch roller 30, and the capstan 59 are in the same positions as in the state shown in FIG. By doing so, the size of the apparatus main body can be reduced by the amount (L) of movement of the tape loading apparatus centering on the guide drum 60. As a result, the mechanism can be reduced to almost the size of the tape cassette 1 in plan view. By not moving the guide drum 60 merely by moving the mechanism, but by moving the casing itself as shown in FIG. 15, the target of the VTR body to be the size of the tape cassette 1 can be achieved.

Since the tape cassette 1 is attached to the VTR main body, the period from when the cassette holder 25 is opened to before the tape cassette 1 is attached to the VTR main body and the tape is loaded,
The case has the largest size of D3. After that, when the tape is loaded and the data can be recorded / reproduced (the state shown in FIG. 13), the housing has a size of D2. Tape cassette 1
If you take out and install only the cassette holder 25 in the VTR body, it becomes the smallest size of the case D1. therefore,
The user can achieve the smallest cassette size when carrying a VTR.

This specific mechanism will be explained starting from FIG. 16th
The figure is a plan view of the apparatus when the housing size is D1. The device is
It comprises reel drive blocks such as a supply reel base 61 and a take-up reel base 62, and a tape loading block centered on the guide drum 60.

As shown in FIG. 17, the chassis has a two-piece structure, 63 is the drive chassis of the reel drive block described above, 64 is the guide shafts 66a, 66b of the shaft housing 65 fixed to the rear surface of the drive chassis 63, and the chassis. The loading chassis is slidably held by a guide A67 and a chassis guide B68 and has a guide drum 60 and the like mounted thereon. The cassette holder mechanism of this device will be described with reference to FIG. The imaginary line in Fig. 18 is the cassette mounting locus. The tape cassette 1 is inserted into the cassette holder in the direction of arrow K. The reason why the device is inserted in the direction opposite to the conventional one is that the size of the device is almost the same as the size of the cassette, so that the device can be constructed in a small space, and since it is a simple fulcrum of rotation, rigidity can be easily obtained.

FIG. 19 shows a side view of the cassette setup state and FIG. 20 shows the cassette down state. FIG. 21 shows a plan view of the cassette down. The holder main body 69 has four guide pins 72, 7 on both sides of which a right side plate 70 and a left side plate 71 are pivotally supported by the holder main body.
3 and long guide holes 70a, 70b, 71a, 71b engaging with them are held slidably up and down. guide pin
Reference numeral 72 also serves as a fulcrum of the cassette pressing spring 74. One end of the cassette pressing spring 74 is in contact with the cassette pressing pin 75 integrated with the right side plate 70 and the left side plate 71, and the other is in contact with the holder body 69. . Therefore, the right side plate 70, the left side plate 71 and the holder body 69
It is urged in the direction to separate from. Reference numeral 76 denotes a holder fulcrum, which is fixed to a right side substrate (not shown) left side substrate 77 fixed to both sides of the drive chassis 63, and engages holes on both side surfaces of the holder body 69 to rotate the holder body 69. Support freely. A holder spring 78 is provided at the holder fulcrum 76 of the left-sided board 7, and one end thereof has a fixing portion 77 of the left-sided board 77.
At a, the other end engages with a cam lever fulcrum pin 79 fixed to the holder body 69, and urges the holder body 69 in the clockwise direction in FIG. The cam lever 80, which is rotatably supported by the cam lever fulcrum pin 79, has a substantially L shape as shown in FIGS. 20 and 22 (viewed in the direction of arrow F in FIG. 20). It has a convex portion 80a that engages with the formed cam groove 77b and a cam pin 82 that engages with the long hole portion 81a of the relay lever 81 shown in FIG. Relay lever 81 has guide pin 72
Is rotatably supported at its one end, and one end thereof is engaged with a lid lock release lever 83 slidably supported on the side surface of the left side plate 71 by a pin A84 and a pin B85 via a release lever pin 86. The relationship between the lid lock release lever 83 and the relay lever 81 is as shown in FIG. 24, and the lid lock release lever 83 has a U-shaped protrusion 83a at the bottom thereof.

Reference numeral 87 is a lock claw that holds the cassette holder 25 and the tape cassette 1 in a state where the tape can be pulled out as shown in FIG. 20 by engaging the claw portion 87a of the lock pin 88 implanted in the holder body 69. . The lock pawl 87 is held at a position rotated counterclockwise against the lock spring 89 in the setup state shown in FIG. 19, and is biased clockwise by the lock spring 89 in the cassette down state shown in FIG. 87a
Engages the lock pin 88. The operation of the lock claw 87 will be described later in the tape loading operation.

The operation of the cassette holder having the above structure will be described below.
In FIG. 19, the tape cassette 1 is inserted from the K direction in the setup state. At this time, the cassette holding spring 74 causes the right side plate 70 and the left side plate 71 to move from the holder body 69 to the guide hole 70.
It is urged downward as long as the long holes of a and 70b permit. Since the distance L1 between the lower end of the cassette pressing pin 75 and the cassette receiving portions 70c, 71c of the right side plate 70 and the left side plate 71 is slightly larger than the thickness L2 of the tape cassette 1, the cassette pressing spring 74 when the tape cassette 1 is inserted. There is no load. Pressing the holder body 69 and rotating the cassette holder around the holder fulcrum 76 against the holder spring 78 causes the cam lever to move.
80 is the 19th position due to the cam groove 77b of the left-hand side substrate 77 to be guided.
In the figure, the cam lever fulcrum pin 79 is rotated counterclockwise. Then, the relay lever 81 becomes the guide pin.
The lid lock release lever 83 is rotated clockwise about 72, and is further slid upward by being guided by the pins A84 and B85. The protrusion 83a of the lid lock release lever 83 is
In FIG. 19, the tape cassette 1 is located at a position lower than the bottom surface of the tape cassette 1, but when it is slid upward, it invades a part of the tape cassette 1 as shown in FIG. 23 (PP sectional view of FIG. 21). To do. This intruding portion corresponds to the position of the lid lock mechanism described in FIGS. 9 and 10, and the protrusion 83a is the lid lock claw 1.
The lid lock claw 17 is rotated counterclockwise around the claw fulcrum 16 along the inclined portion 83b of the protrusion 83a while contacting one end of the claw fulcrum. The projection piece 15 engaged with a part of the lid lock claw 17 is unlocked, and the front lid 5 can be opened. This series of operations is completed by the time the tape cassette 1 moves from P1 to P2 in FIG. 18, and at the position P2, the lid opening pin 90 contacts a part of the front lid 5 of the tape cassette 1. The lid opening / closing pin 90 is fixed to an opener 93 that rotates around an opener fulcrum pin 92 that is planted in the stopper plate 91. Opener 93
Is biased clockwise by the opener return spring 94 and
It stops by abutting a part of the stopper plate 91 at the position indicated by the imaginary line. Therefore, the tape cassette 1
When P moves from P2 to P3, the spring force of the opener return spring 94 is weaker than that of the front cover spring (not shown) that biases the front cover 5 to the closed state, so that the opener 93 rotates counterclockwise. Then, one end of the opener 93 comes into contact with the stopper plate 91. When the cassette holder is further rotated, the front lid 5 is opened as shown by the solid line, and the tape 4 can be pulled out. When reaching the position indicated by the solid line, the lock pin 88 engages with the lock claw 87 as shown in FIG. 20, and the tape cassette insertion operation is completed. At this time, the bottom surface of the tape cassette 1 is supported by cassette positioning pins (not shown) planted in a plurality of drive chassis 63, and the front, rear, left and right directions and height are positioned. The position where the cassette holder is positioned by the lock pin 88 and the lock claw 87 described above is located at a position where the holder main body 69 is further rotated from the position where the tape cassette 1 is in contact with the cassette positioning pin. Only by the cassette pressing spring 74, the tape cassette 1 can be urged downward through the cassette pressing pin 75 to perform firm positioning. The lid opening pin 90
The reason why the structure is rotated is that the operation of the opener 93 is used for detecting the presence or absence of the cassette. If only the cassette holder is installed without a cassette, the opener 93 does not rotate from the position indicated by the imaginary line, so that the presence / absence of a cassette can be detected.

Next, a specific mechanism of the tape loading drive mechanism will be described from FIG. 25 onward. Reference numeral 95 denotes a holder gear having a holder fulcrum 76 shown in FIG. 19 as its center, and rotates together with the holder main body 69. The holder gear 95 meshes with the main gear 96 as shown in FIG. 26, and power is further transmitted to the unload gear A97, the unload gear B98, and the load gear 99. As shown in FIG. 29, the load gear 99 drives the main slide plate 130 provided on the loading chassis 64 to cause the tape loading operation. As shown in FIGS. 25 and 27, the main gear 96 is integrally provided with a gear lock plate 133 on which a gear lock claw 131 is rotatably supported around a lock claw shaft 132, and a main gear shaft 137 is provided. It is the center of rotation. The gear lock claw 131 is biased by a gear spring 135 in a direction in which the gear lock claw 131 is engaged with a gear lock pin 134 planted in the unload gear A97. The unload gear A97 is partially cut in the radial direction and
As shown in FIGS. 6 and 27, an unload wire 138 having a substantially fan-shaped drum portion 97a provided with one end fixed to the wire hook pin 136 is provided.
Is wound around the drum part 97a. Unload wire 1
Since 38 is engaged with the unload spring 140 whose one end is fixed to the left board 77 via the wire guide pin 139, the unload gear 97 is biased clockwise in FIG. 27. . The unload gear B98 has a load gear pin 141 and a holder lock release pin 142 that project toward the left side substrate 77.
And a plate pin 144 that rotatably supports the load spring plate 143. Unload gear B98 Rotation center unload gear shaft 150 Coaxially arranged with load gear 9
As shown in FIG. 26, the ridge gear 9 has a substantially linear groove portion 99a on the side of the unload gear B98. One end of the groove portion 99a is fixed to the load gear 99 and the other end is a load spring. A load spring 146 locked by a spring locking pin 145 of the plate 143 is included. In addition, the road gear 99 is an unload gear
There is a load gear lock pin 147 protruding in the B98 direction, which is in contact with a locking portion 143a of the load spring plate 143 and holds the load spring 146 in a stretched state by a predetermined amount. The load gear lock pin 147 is rotatably supported by the left-side board 77 and is engaged with a load gear lock plate 149 which receives a clockwise biasing force by a load gear lock spring 148. Therefore, the load gear 99 is prevented from rotating clockwise. Figure 27 shows the setup state.
It matches the positional relationship of the cassette holder in Fig. 19. FIG. 28 is a view of the cassette down state, which corresponds to the positional relationship of the cassette holder in FIG.

Next, referring to FIG. 29, the loading chassis 64 slide mechanism connected to the load gear 99 will be described. FIG. 29 is a diagram showing a positional relationship before tape loading, which corresponds to the loading drive mechanism shown in FIGS. 27 and 28. Explanation will be given with reference to the exploded perspective view of the main components shown in FIG. The chassis guide B68 is fixed to the left end of the loading chassis 64 and guided by the guide shaft 66b to slide. The chassis guide B68 also has a mode switching slide plate 151.
Is supported by a slide plate guide pin 152 so that it can slide a little. A mode gear 155 that rotates integrally with the mode arm 153 meshes with the rack portion 151a of the mode switching slide plate 151. Further, the mode switching pin 156 planted in the mode arm 153 is engaged with the guide hole 68a of the chassis guide B68. Mode arm 15
3. The main slide plate 130 for implanting the arm shaft 154 around the rotation center of the mode gear 155 is slidably held relative to the chassis guide B68 via the two elongated holes, and also has a mode on the upper side. A mode spring 157 locked to the switching slide plate 151 is retained. Main slide plate 130
The rack A 130a meshes with the load gear 99, and the rack B 130b meshes with the large diameter portion 158a of the relay gear 158 as shown in FIG. As shown in FIG. 29, 159 is a mode lock plate in which the tip 159a of the mode switching slide plate 151 can selectively contact the mode pin 161 of the mode switching slide plate 151, with the lock plate support shaft 160 of the left substrate 77 as the center of rotation. Is.

A guide drum drive mechanism connected to the main slide plate 130 shown in FIG. 32 will be described. FIG. 32 is a diagram showing a positional relationship before tape loading as in FIG. 29. Fig. 33 shows 32
It is an A-B-C-D-E-F sectional view of the figure. Note that FIG. 33 also shows related parts such as the drive chassis 63 for easy understanding. The relay gear 158 rotatably supported by the relay gear shaft 162 planted in the drive chassis 63 has a large diameter portion 158a on the rack B 130b of the main slide plate 130 and a small diameter portion 158b on the drive chassis 63. Slide guide pin
It meshes with the rack of the sub slide plate A164 guided by 163. The sub-slide plate B172 that shares the slide guide pin 163 as a guide shaft includes a rack portion 172a that meshes with the drum drive gear A165 that is rotatably supported by the loading chassis 64, and a spring hook portion 172b that is bent in a U shape. , A cam portion 172c that abuts the select pin 167 at one end of the select lever 166. On the side opposite to the spring hook 172b, the slide lock plate 168 is supported so as to be slightly movable, and a loading charge spring 173 is arranged between the slide lock plate 168 and the slide lock plate 168 so that the slide lock plate 168 is provided in the long hole 168a. It urges in the M direction as far as it allows. The slide lock plate 168 rotatably supports a slide lock lever 169, and applies a clockwise urging force to the slide lock lever 169 by a slide lock spring 170 provided on the rotation support shaft. Claw 1 of slide lock lever 169
Since 69a is engaged with the slide lock pin 171 provided on the sub slide plate A164, in this state, the sub slide plate A164 and the sub slide plate B172 operate integrally. The drum drive gear A165 that meshes with the rack portion 172a of the sub-slide plate B172 includes a small diameter gear 174a of the drum drive gear B174 and a large diameter gear 174b of the drum drive gear B174.
Is to mesh with the drum drive gear C175. The drum drive gears A165, B174, C175 are provided on the loading chassis 64 as shown in FIG. On the other hand, the large diameter portion 158a of the relay gear 158 meshes with the small diameter gear portion 176a of the reel drive gear A176 as shown in FIGS. 36 and 37, and the small diameter portion 158b of the relay gear 158 corresponds to the S1 post drive gear 177. It also meshes with the large-diameter gear portion 177a. The large-diameter gear portion 176b of the reel drive gear A176 and the small-diameter gear portion 178a of the reel drive gear B178 mesh with the reel drive gear C179. The reel drive gear C179 is a reel drive gear shaft 18 fixed to the shaft housing 65.
It is press-fitted into a slip holder 181 which is rotatably supported at 0. The slip holder 181 includes friction members A182 and B183 on the upper flange portion 181a and serves as a rotation center axis of the reel drive gear D184. Since the reel drive gear D184 is provided with the reel drive clutch spring 185 (compression spring) between the reel drive gears C179, the driving force of the reel drive gear C179 is transmitted to the reel drive gear A184 via the friction member B183. Further, the reel drive gear shaft 180 is provided with a reel drive plate 187 having a reel drive gear E186 that is rotatable and meshes with the reel drive gear D184, and is biased by a leaf spring 188 against a friction member A182. ing. Therefore, when a counterclockwise driving force is generated in the reel drive gear C179 in FIG. 36, a counterclockwise turning moment is generated in the reel drive plate 187 via the slip holder 181 and the friction member A182, and the reel drive gear E186 becomes The relay gear 158 is rotated until it meshes with the gear portion 61a of the supply reel base 61.
To complete the transmission path from the supply reel base 61 to the gear portion 61a. This is for winding the tape that has already been pulled out onto the supply reel 2 during the tape unloading operation. Next S1 succeeding S1 post drive gear 177
The movement mechanism of the post 31, the S2 post 33, and the erase head 58 will be described with reference to FIGS. 38 to 40.

The S1 post drive gear 177 of FIG. 38 shares the center of rotation with the select lever 166 of FIG. 39th
As shown in FIG. 40, the select lever 166 is provided on the large diameter portion below the S1 post drive gear shaft 192 of the drive gear plate 191 fixed to the drive chassis 63 via the collar 190.
Is urged clockwise by a lever spring 193 (FIG. 32). On the other hand, the S1 post drive gear 177 is rotatably supported on the upper small diameter portion. S1 in Fig. 39
The S1 post gear 194 that meshes with the post drive gear 177 is the S1
It is integrated with the post 31 and uses the S1 post shaft 195 as the center of rotation. The erase head boat 196 with the erase head 58 and the S2 post 33 fixed has the boat guide 197.
Two collars 198 inserted in the long hole 197a of the boat, a boat gear 199 having a rack, and a boat retainer 200
Screwed from the bottom of 200. Therefore, the erase head boat 196, the boat gear 199, and the boat retainer 200
Are slidably held by the boat guide 197. As shown in FIG. 38, two collars 201 are also inserted in the other long hole portion 197b of the port guide 197, and the boat retainer 202 is slidable with respect to the boat guide 197. Is held. The boat guide 197 is fixed to the drive chassis 63 by the two collars 204, and the boat gear 199 configured therein has the S1 post gear 19 via the erase relay gear 205.
4 is engaged. S3 Boat Holder 203, S3 Post 34
The S3 boat 206 fixed to the S3 boat 206 is rotatably supported around the boat support shaft 207, but normally, the S3 boat 206 is biased counterclockwise by the boat spring 208, so that the S3 boat 206 is fixed.
The protruding portion 206a is held at a position where it abuts against the side surface of the S3 boat holder 203. Although not shown, the S3 boat spring 209 is housed in the U groove portion of the S3 boat holder 203, and is stretched between the sub slide plate 172 and the S3 boat holder 203. By the pulling force of this boat spring 209,
End surface 172d and S3 of spring hook 172b of sub slide plate B172
The boat holder 203U is held at the position where the groove opening end face portion 203a abuts.

Reference numeral 32 denotes a tension post, which is rotatable about a tension post support shaft 210 and is biased counterclockwise by a tension spring 211. The tension post 32 follows the rotation of the S1 post 31, and the post arm 212 of the tension post 32 can contact the holder portion 31a of the S1 post 31. FIG. 38 is a positional relationship diagram when the guide drum 60 is at the position C3 and the housing size is D1 (FIG. 15).

41 to 43 show an example of the cassette detecting means. When the cassette holder is attached to the main body, it is judged whether the tape cassette 1 is stored in the cassette holder, and the amount of movement of the guide drum 60 and the housing are determined. The movement amount of is automatically switched. For this determination, this embodiment employs a method of detecting the lower portion of the rear surface of the tape cassette 1. Of course, this method is not limited to this position, and many detection methods are conceivable. Now, an example thereof will be described. 41 shows the case where the tape cassette 1 is not mounted, and FIG. 43 shows the time when the tape cassette 1 is used. An actuator holder 214 that rotatably supports the actuator 213 is fixed to the shaft housing 65, and a lock release arm 215 is rotatably supported near the actuator holder 214. Unlock arm 215
Receives a biasing force in the clockwise direction by the lock release spring 216, and a downwardly extending release pin 217 provided at the tip of the arm.
Contact the protrusion 169b of the slide lock lever 169 and resist the slide lock spring 170,
Rotate 69 counterclockwise. Since the spring force of the lock release spring 216 is stronger than the spring force of the slide lock spring 170, the slide lock lever 169 is rotated counterclockwise, and the claw portion 169a of the slide lock lever 169 and the slide of the sub slide plate A164 slide. The lock pin 171 is disengaged.
The arm portion 213a extending below the actuator 213 is in contact with the end portion of the lock release arm 215, and is normally held at a position rotated clockwise by the urging force of the lock release spring 216 as shown in FIG. To be done. In this state, the head portion 213b extending upward, which is opposite to the arm portion 213a of the actuator 213, is in the cassette mounting space, but the position indicated by the solid line is maintained when the cassette is not mounted. But tape cassette 1
Due to the cassette inserting operation, the actuator 213 rotates counterclockwise, and the arm portion 213a of the actuator 213 locks the unlocking arm 21.
Turn 5 counterclockwise. Then, as shown in FIG. 43, the slide lock lever 169 is released from the regulation of the lock release arm 215, so that it is rotated clockwise by the slide lock spring 170, and its claw portion 169a and the slide lock pin 171 of the sub slide plate A164 are engaged. To meet.

Next, the tape loading mechanism near the guide drum 60 will be described. 44 and 45 are layout diagrams of main parts before tape loading, and FIG. 45 is a view as seen from the arrow F of FIG. 44.
Description will be given with reference to the exploded perspective view of FIG. The drum holder 218 tilted by a predetermined angle in the Y direction in FIG. 46 with respect to the loading chassis 64 is the loading chassis 64.
It is configured integrally with. On the upper surface 218a of the drum holder 218, two guide rollers 219 are rotatably supported, and a roller plate 221 which is slightly movable around the center pin 220 holds one guide roller 222 rotatably. It has been stopped. These 3 guide rollers 21
9,222 has a generally rhombus shape, and the guide drum 60
Then, the guide drum 60 is guided to rotate by engaging with the V groove portion 223a of the loading ring 223 which is fixed and integrated at a certain angle (an inclination different from the drum holder). The loading gear 224 is also fixedly integrated with the guide drum 60 at an angle (the same relative angle between the loading ring 223 and the guide drum 60). The rotation planes of the loading ring 223 and the loading gear 224 are
It is a plane parallel to the upper surface 218a of the drum holder 218. With respect to the loading ring 223, the main boat 225 having the T1 post 35, the fixed post 55, and the T2 post 36 is rotatable about the boat fulcrum pin 226, and the main boat spring 2
It is held in a state of being urged clockwise by 27. Further, behind the main boat 225, a sub-boat 228 equipped with a T3 post 37 and an inclined guide post 53 is configured to be guided in the elongated hole of the guide portion 223b of the loading ring 223, and is urged toward the main boat 225 side by the sub-boat spring 229. It is held in a fixed shape. The loading ring 223 is inclined as shown in FIG. 45, but the guide portion 223b for guiding the sub boat 228 is, on the contrary, in a shape of being horizontally guided. 230
Is the sub boat retainer, and screw it from below
The 228 is held by the guide portion 223b so as to be slidable along the elongated hole. 231 is a sub-boat stopper that positions the sub-boat 228 by contacting the tip portion 228a of the sub-boat 228 during the loading process.
It is fixed at 64. 232 is a main boat stopper, which positions the main boat 225 with a stopper plate 234. 235 is an S3 boat guide that guides the S3 post 34 and also performs final positioning.
The downward projection of the post shaft 34a of the S3 post 34 shown in FIG. 39 is engaged and guided. What has been described above is one structural example of the present invention. Next, based on this configuration example, the operation will be described in association with the operation of the cassette holder described above. First, assume that the tape cassette 1 is inserted into the cassette holder and the cassette holder is pushed down to position the cassette holder at a predetermined position. This operation causes the holder gear 95 to move to the 27th
It rotates clockwise from the figure to the position shown in FIG. The holder gear 95 meshes with the main gear 96, and since the main gear 96 is connected via the unload gear A97 and the gear lock claw 131, the main gear 96 and the unload gear A97 are shown in FIG. Rotate counterclockwise to position. Unload wire 13
Since 8 is entrained in the drum portion 97a accordingly, the unload spring 140 is stretched, and the unload gear A97
A moment is stored that rotates the clockwise direction. Since the unload gear B98 also meshes with the unload gear A97, it interlocks with the inserting operation of the cassette holder and rotates clockwise by a predetermined angle to reach the position shown in FIG. But road gear 99
The load gear lock plate 149 prohibits clockwise rotation as shown in FIG.
3 is separated from the load gear lock pin 147, and the load spring 14
Stretch 6 Since the load spring 146 is formed in the groove portion 99a, the load spring 146 is wound toward the unload gear shaft 150 along the substantially linear groove portion 99a. This is because the length change of the load spring 146 is gradually reduced compared to the rotation angle of the unload gear B98, and the load spring 146
This is to minimize the change in the length of the cassette holder and reduce the cassette holder rotation load by the operator. Unload gear A9
For the same reason, the drum portion 97a of 7 is modified into a substantially fan shape and the displacement amount of the unload spring 140 is reduced. When the load spring 146 is continuously charged in the clockwise direction while being charged in this way, the load gear pin 141 of the unload gear B98 is moved to one end of the load gear lock plate 149 as shown in FIG. 28 near the end of the rotation process. Then, the load gear lock plate 149 is rotated counterclockwise against the load gear lock spring 148. Although the rotation of the load gear 99 is blocked by the load gear lock plate 149, the load gear 99 is released and the load gear 99 is rotated clockwise by the spring force of the load spring 146. The lock claw 87 is a lock spring 89.
Although it is urged in the counterclockwise direction by the lock claw set-up state, the holder lock release pin 142 is stopped clockwise by the spring force of the unload spring 140 by the lock claw 87 as shown in FIG. 27. ing. However, since the unload gear B98 rotates clockwise in conjunction with the insertion operation of the cassette holder, the lock claw 87 rotates counterclockwise and can be engaged with the lock pin 88. (Fig. 28) As explained above, the main gear 96, the unload gear A97, and the unload gear B98 rotate in conjunction with the cassette holder insertion / installation operation, but only the load gear 99 operates in the cassette holder insertion / installation operation. Immediately before the completion of the above, the lock is released and the load spring 146 rotates clockwise. This is because the rotation of the load gear 99 is directly connected to the tape loading operation,
It is a necessary condition that the tape cassette 1 is inserted in the specified position and that it can be loaded sufficiently.
Unlike 7,98, the load gear 99 is unlocked by slightly pushing down the cassette holder due to the spring charge operation of the cassette pressing spring 74 after the tape cassette 1 is inserted. This road gear 99
When the lock is released and rotated clockwise, the main slide plate 130 moves from the position shown in FIG. 29 to the position shown in FIG. By moving the main slide plate 130, the relay gear 158 is rotated to move the sub slide plate A164 in the direction opposite to the main slide plate 130 (see FIG. 35). As shown in FIG. 42, the tape cassette 1 is inserted. The attachment causes the actuator 213 to rotate counterclockwise (at the position indicated by the imaginary line), whereby the slide lock lever 169 rotates clockwise in FIG. 41 and engages with the slide lock pin 171. As a result, the positional relationship shown in FIG. 43 is obtained, and the sub slide plate B172 moves together with the sub slide plate A164. The select pin 167 that was in contact with the cam portion 172c at the tip of the sub slide plate B172 is released from the cam portion 172c and rotated clockwise by the lever spring 193 because the sub slide plate B172 moves. Since the U-shaped portion 166a at the other end of the select lever 166 having the select pin 167 at one end is engaged with the mode lock plate 159 shown in FIG. 29, when the select lever 166 is rotated clockwise, the mode lock plate 166 is rotated. Rotate 159 counterclockwise to the position shown in FIG. This mode lock plate 15
Since the rotation of 9 is performed in the initial stage of the movement of the main slide plate 130, if the main slide plate 130 continues to move further, the mode pin 161 of the mode switching slide plate 151 provided in the chassis guide B68 It is located in the moving space, and the tip 159a of the mode pin 161 engages with it. In this way, the mode switching slide plate 151 can be stopped from moving by the mode lock plate 159.
Moves, the mode gear 155 rotates clockwise and the third gear
It looks like Figure 1. Therefore, the chassis guide B68 is relatively separated from the main slide plate 130, and the mode spring 157 is
Stores and holds a large spring force. In this way, the rotation of the load gear 99 is directly transmitted to the main slide plate 130, but the chassis guide B68 moves less than the main slide plate 130. This is because the amount of movement of the main slide plate 130 is C of the guide drum 60 in FIG.
The amount of movement of the chassis guide B68 this time is the same as the amount of movement from the position 1 to the position of the imaginary line of C3.
It is the same as the amount of movement from the position of 1 to the position of the imaginary line of C2. In other words, the amount of relative separation between the main slide plate 130 and the chassis guide B68 due to the clockwise rotation of the mode gear 155 is the value L in FIG.

Next, the operation of the relay gear 158 rotated counterclockwise by the main slide plate 130 will be described. As described above, the sub-slide plate B172 moves integrally with the sub-slide plate A164 in the direction opposite to the main slide plate, but the amount of this movement is reduced by the relay gear 158, and its value is shown in FIG. The length is L. Therefore, since the drum drive gear A165 is provided on the loading chassis 64, it moves the same amount as the chassis guide B68, but the sub-slide plate B172 also moves relatively, and changes from the position shown in FIG. 32 to the position shown in FIG. . The rotation of the drum drive gear A165 obtained by the relative movement of the sub slide plate B172 and the drum drive gear A165 is transmitted to the drum drive gear B174 and the drum drive gear C175, and
Rotate C175 clockwise.

On the other hand, the rotation of the relay gear 158 is the same as that of the S1 post 3 in FIGS.
Also used for moving the S2 post 33 and erase head 58. S1
The post 31 rotates counterclockwise, and the S2 post 33 and the erase head 58 move in the tape cassette direction from the position shown in FIG. 44 to the position shown in FIG. The position of the tension post 32 is
It depends on the S1 post 33, and when the S1 post 33 rotates counterclockwise, the tension spring 211 follows and rotates counterclockwise. In addition, the S3 boat holder 203 that is connected to the sub slide plate B172 by the S3 boat spring 209.
Moves in the direction opposite to the erase head 58 as the sub-slide plate B172 moves. Initially during this movement, the S3 boat 206 is biased to the side surface of the S3 boat holder 203 by the boat spring 208, but the S3 boat guide 235 provided on the loading plate 64 relatively approaches the S3 boat 206,
The S3 post 34 is guided to gradually rotate the S3 boat 206 in the clockwise direction to approach the guide drum 60. Eventually
The S3 boat guide 235 is biased and positioned by the boat spring 209 at the end of the U groove 235a. Thus, the tape loading operation of the tape guide member from the supply reel 2 to the guide drum 60 is completed as shown in FIG. Next, the guide drum 60, the main boat 225, and the sub boat 22
The operation of 8 will be described. Since the loading chassis 64 is integrated with the chassis guide B68, when the load gear 99 and the main slide plate 130 move a predetermined amount (LB), the L of FIG.
Only A changes the relative position to the tape cassette 1. Therefore, the guide drum 60 changes from the position C1 in FIG. 1 to the position C2. With this movement, the guide drum 60 receives the rotational force of the counterclockwise direction because the rotation of the drum drive gear C175 is transmitted to the loading gear 224. Main boat
The 225 is biased counterclockwise by the main boat spring 227, so the T1 post 35, the fixed post 55, and the
The T2 post 36 is in the position shown in FIGS. 44 and 45. Sub boat
Since the 228 is also biased toward the main boat 225 side by the sub-boat spring 229, the T3 post 37 and the inclined guide post 35 before loading are the tape cassette 1 as shown in FIGS. 44 and 45.
In the opening. Now, when the loading chassis 224 is moved to the tape cassette 1 side while rotating the loading gear 224 counterclockwise from this state, approximately 15
The tip portion 228a of the sub boat 228 is rotated by 0 °, and the sub boat stopper 23 provided on the loading chassis 64
Abut 1. FIG. 49 shows a plan view thereof, and FIG. 50 shows a view on arrow X of FIG. 49. Since the center of rotation of the loading ring 223 is inclined by a predetermined angle in the Y direction as described above, T1
Each post from post 35 to the inclined guide post 53
It is the highest position before loading in FIG. 44, and is considerably lower than the tape 4 in FIG. 49 as shown in FIG. 50. When the loading gear 224 is further rotated from this state, the sub boat 228 resists the sub boat spring 229 and is guided by the elongated hole of the guide portion 223b of the loading ring 223 and stopped at that position. At this time, the guide portion 223b of the loading ring 223 is
Since it is a plane inclined at a predetermined angle with respect to
8 rises with respect to the loading ring 223, and at the end of loading, T3 post 37, inclined guide post 53
Changes from the position of the solid line to the position of the imaginary line. On the other hand, in the main boat 225, when the rotation of the loading gear 224 progresses,
The protrusion 225a of the main boat 225 is the main boat stopper 2
It comes into contact with the right side surface portion 232b of the convex portion 232a provided at one end of 32. Thereafter, when the loading gear 224 further rotates, the main boat 225 starts rotating counterclockwise around the boat fulcrum pin 226 against the main boat spring 227.
The protruding portion 225a of the main boat 225 is the main boat stopper 2
The contact portion of 32 with the convex portion 232a is from the right side surface portion 232b to the upper side surface portion 23.
Move to 2c. This causes the main boat 225 to rotate about 120 ° so that the T1 post 35 approaches the guide drum as shown in FIG. At this time, the main boat 225 is positioned by the main boat stopper 232 and the stopper plate 234.
Although the loading gear 224 is stopped in this way, the rotation amount of the drum drive gear A165 by the sub-slide plate B172 is set to be slightly larger than the required rotation amount of the loading gear 224. The stroke in which the chassis 64 moves to the tape cassette 1 side pushes the sub slide plate B172 to the tape cassette 1 side. Figure 35 shows the relationship diagram. The sub-slide plate A164 moves by a predetermined amount, and when the sub-slide plate B172 moves in the opposite direction slightly, the slide lock lever 169 engages with the slide lock pin 171 of the sub-slide plate A164. 169
And slide lock plate 168 is a sub slide plate A164
Along with this, the loading charge spring 173 extends and urges the sub-slide plate B172 in the PP direction. This urging force urges the loading gear 224 in the loading direction, in other words, it is a force that firmly presses the main boat 225 against the main boat stopper 232. The guide drum 60 is tilted as shown in Fig. 44 before loading,
At the end of loading, it is set to satisfy the so-called "U loading tape pass" requirement in which the lead angle is inclined in the direction A as shown in FIG. The operation of the pinch roller 30, T4 post 38, and T5 post 39 and the description of their moving configuration are omitted, but since they are posts perpendicular to the drive chassis 63, the operation of the sub-slide plate A164 is used as an input and conventional means is used. It is not so difficult to move it to a predetermined position. FIG. 48 shows the completed loading in this way.

Next, the tape unloading operation and the cassette ejecting operation will be described. When the cassette take-out command is received, the motor (not shown) causes the unlocking portion 131a of the gear lock pawl 131 in FIG. 28 to receive a force in the FA direction, and the gear lock pawl 131 is rotated clockwise against the gear spring 135. Then, the engagement with the gear lock pin 134 is released. Then, the unload gear A97 is rotated clockwise by the unload spring 140, and the unload gear B98 also starts rotating counterclockwise. When the unload gear B98 rotates counterclockwise, it is stretched between the unload gear B98 and the load gear 99, and the load spring 146 for urging the main slide plate 130 in the loading direction is locked by the locking portion 143a of the load spring plate 143. And the contact of the road gear lock pin 147, the force is lost. Therefore, after that, in the positional relationship in which the locking portion 143a of the load spring plate 143 and the load gear lock pin 147 contact each other, the unload gear B98
27 and the load gear 99 rotate integrally in the counterclockwise direction, and finally the load gear lock pin 147 gets over the claw portion of the load gear lock plate 149 and becomes the positional relationship shown in FIG.
At this time, the rotation of the unload gear B98 releases the bias of the load gear lock plate 149 in the counterclockwise direction by the load gear pin 141, and the load gear lock spring 148 is rotatable by a predetermined amount. For the road gear lock pin 14
7 can be engaged. When the load gear 99 rotates counterclockwise, the main slide plate 130 also starts moving in the unload direction. At this time, by the mode spring 157 stretched between the main slide plate 130 and the mode switching slide plate 151, the mode switching slide plate 151 and the main slide plate 130.
, The mode gear 155 rotates counterclockwise by about 180 °, and the rotation is stopped by the mode switching pin 156 contacting the lowermost end of the guide hole 68a of the chassis guide B68. When the rotation is stopped, the main slide plate 130 and the chassis guide B68 move together in the unload direction. S
The 1st post 31, the S2 post 33, and the erase head 58 also interlock with the main slide plate 130 to perform the unloading operation opposite to the loading operation. Since the tension arm 32 contacts the holder portion 31a of the S1 post 31, the post arm 212 abuts on the S1 post 31.
Similarly, it is rotated clockwise by being pushed by the clockwise rotation of 31 and is housed in the opening of the tape cassette 1 together with the S1 post 31. S3 boat holder 203 with S3 post 34
The sub-slide plate B172 moves to the tape cassette 1 side together with the sub-slide plate A164.
The end 172d of the spring hook 172b and the boat holder 203U of S3
It moves to the reel side in a positional relationship where the groove opening end face portion 203a abuts. Since the S3 boat 206 is released from the regulation of the S3 boat guide 235, the boat spring 208 causes the protrusion 206a to move to the S position.
3 It is held at a position where it comes into contact with the side surface of the boat holder 203. The loading gear 224 is also the sub slide plate B172,
The rotation of the drive gear A165 caused by the relative movement of the drum drive gear A165 is transmitted to rotate the drive gear A165 in the clockwise direction. The main boat 225 has a convex portion 232a of the main boat stopper 232.
The main boat spring 227 causes the main boat spring 227 to rotate clockwise to return as the engagement with the The sub boat 228 also moves to the main boat 225 side by the sub boat spring 229, and then rotates together with the main boat 225 in the clockwise direction integrally with the loading ring 223 and the guide drum 60 to return to the position shown in FIG. 44 and stop. Further, the T4 post 38, the pinch roller 30, and the T5 post 39 also return to the predetermined positions in conjunction with this unloading operation. The supply reel base 61 drive mechanism is used to absorb the slack of the tape caused by this unloading operation. This is shown in FIG. 36. Since the reel drive plate 187 has a friction transmission function as described above, the counterclockwise rotation of the reel drive gear C179 due to the clockwise rotation of the relay gear 158 is prevented from occurring. 187 is rotated counterclockwise so that the reel drive gear E186, which meshes with the reel drive gear D184, meshes with the gear portion 61a of the supply reel base 61. At this time, since the reel drive gear D184 is frictionally transmitted from the reel drive gear C179, the change in the required rotation number of the reel base due to the difference in the amount of tape wound around the supply reel 2 is the required rotation number when there is no tape. If set as + α, the excess will be absorbed by slip. Immediately before the end of the unloading operation, the holder lock release pin 1 of the unload gear B98
42 rotates the lock claw 87 clockwise against the lock spring 89. Therefore, the lock pin 88 is released from the lock claw 87, and the garage holder is moved by the holder spring 78.
19 Turn clockwise as shown in the figure and stop. During this pivoting process, the front lid 5 and the back lid 6 are closed, and the projection 83a of the lid lock release lever 83 is retracted from the tape cassette 1, so that the front lid 5 and the back lid 6 cannot be opened. The main gear 96 meshed with the holder gear 95 by this rotation is the gear lock claw 131.
At the same time, it rotates clockwise from FIG. 28 to FIG. Then, the gear lock pin 134 and the gear lock claw 131 of the unload gear A97 are engaged immediately before the end of the rotation of the cassette holder, and the second lock is performed.
7 Return to the positional relationship shown in Fig. The opener 93 is also rotated and returned clockwise by the opener return spring 94. Further, the actuator of the cassette detecting means shown in FIG. 42 returns to the position indicated by the solid line by taking out the tape cassette 1 from the cassette holder, and as shown in FIG. 41, the sub-slide plate A164 and the sub-slide plate which have returned to the reel stand side. The engagement of B172 is released. With this, everything returned to the state before mounting the cassette.

Next, the case where the tape cassette 1 is installed in the main body device without housing the tape cassette 1 will be described focusing on the different points. Since the tape cassette 1 is not mounted, the actuator 213 is not rotated and is at the position indicated by the solid line.
Therefore, by the relay gear 158, the sub slide plate A164 is
Although moving in the opposite direction to the main slide plate 130, the sub slide plate B172 is fixed at the position shown in FIG. 41, and the main slide plate 130, the sub slide plate A164, and the sub slide plate B172 are fixed.
Changes from FIG. 32 to FIG. Further, since the sub-slide B172 does not move, the select lever 166 also rotates in the counterclockwise direction, and the mode lock plate 159 does not change from the state before loading in FIG. 29. Therefore, when the main slide plate 130 is moved to the reel stand side by the load gear 99, the mode pin 161 of the mode switching slide plate 151 does not engage with the mode lock plate 159, and the main slide plate 1
The movement amount of 30 = the movement amount of the loading chassis 64. The result is shown in Fig. 30. Sub slide plate B172
Is fixed to the drive chassis 63, but the loading chassis 64
Since the amount of movement increased compared to when the tape cassette 1 is installed, the relative positional relationship between the sub slide plate B172 and the drum drive gear A165 at the end of loading is
This is the same as FIG. 34 when not mounted and in FIG. 35 when the tape cassette 1 is mounted. This means loading ring 223 and loading gear on loading chassis 64.
It can be said that the rotation angle of 224 does not change either. Therefore, the operation of the main boat 225 and the sub boat 228 depends on the tape cassette 1.
No difference from the case of wearing. However, sub slide plate
Since the position of B172 does not change, S3 boat holder 203
Although the position with the drive chassis 63 does not change from that before loading, the S3 boat 206 is guided by the S3 boat guide 235 provided on the loading chassis 64 and is guided by the guide drum 6
Close to 0. As a result, the positional relationship becomes as shown in Fig. 14 at the end of loading. The positions of the T4 post 38, the pinch roller 30, and the T5 post 39 are the same as the positions in FIG. 48 (also in FIG. 13). S1 post 31, tension post 32, erase head 5
The 8, S2 post 33 is also identical to FIG. S3 Post 34, T
1 post 35, fixed post 55, T2 post 36, T3 post 37, inclined guide post 53, guide drum 60 are shown in FIG.
The position is changed by the length "L" shown in the figure. The unloading operation does not change from time to time, and after the unloading is completed, the operation is the same as when the tape cassette 1 is used.

In this way, when the cassette holder is pushed down without mounting the tape cassette 1 on the cassette holder, that is, in the VTR carrying state when not in use, the loading operation is automatically performed for each post, so that the cassette size is almost compact. It can be carried in a shape.

Effects of the Invention According to the present invention described above, the following effects can be considered.

(1) It is a tape path that can achieve the smallest possible mechanism when using a tape cassette.

(2) If the tape cassette is not attached to the main unit,
For example, the ultimate size of the tape cassette 1 size can be achieved when the main body is carried or stored.

(3) Even when the tape cassette is not mounted on the main body of the device, the tape loading operation is performed in the same manner as when the tape cassette is mounted. Therefore, the plurality of posts located at the tape cassette opening are guided by the drive chassis. Move to a position away from the drum. As a result, when the guide drum and the guide drum in the vicinity of the reel stand are located at the position C3, the small space between them is not occupied by the post group.

(4) A cassette size mechanism has been achieved by applying the guide drum moving mechanism that was introduced to minimize the size when using a tape cassette, so there are few parts necessary to achieve the cassette size. I'm done.

[Brief description of drawings]

FIG. 1 is a plan view of the guide drum movement trajectory according to the present invention, FIG. 2 is a top perspective view of an 8 mm VTR tape cassette, FIG. 3 is a back perspective view of the tape cassette, FIG. 4 is a plan view of the tape cassette, and FIG. Is a side view of the tape cassette, and FIG.
7 is a sectional view taken along the line BB of FIG. 4, and FIG. 9 is a partial sectional view of the cassette lid lock portion.
FIG. 11 is a side view of the cassette lid lock part, FIG. 11 is a perspective view of one embodiment of the lid lock release, FIG. 12 is a perspective view of one embodiment of the lid opening / closing mechanism, and FIG. 13 is one embodiment of the present invention. FIG. 14 is a plan view of the tape loading device, FIG. 14 is a plan view of the tape loading device according to the embodiment of the present invention when a tape cassette is not mounted, and FIG. 15 is a housing structure of the tape loading device according to the embodiment of the present invention. FIG. 16 is a perspective view of a specific embodiment of the present invention, FIG. 17 is a perspective view of a chassis structure,
FIG. 18 is a side view of the cassette holder, FIG. 19 is a side view of the cassette holder in a setup state, FIG. 20 is a side view of the cassette holder in the cassette down state, FIG. 21 is a plan view of the cassette holder, and FIG. Is a partial front view of the cassette holder, FIG. 23 is a sectional view taken along the line PP of FIG. 21, FIG. 24 is a perspective view of a lid lock release mechanism of the cassette holder, and FIG.
Fig. 26 is a main exploded perspective view of the tape loading drive mechanism. Fig. 26 is a view of the KK arrow of Fig. 27. Fig. 27 is a side view of the tape loading drive mechanism in the setup state. Fig. 28 is a cassette down state. 29 is a side view of the tape loading drive mechanism of FIG. 29, FIG. 29 is a side view of the loading chassis moving mechanism before tape loading, FIG. 30 is a side view of the loading chassis moving mechanism after tape loading when the tape cassette is not installed, and FIG. 31 is Side view of the loading chassis moving mechanism after tape loading when using a tape cassette, FIG. 32 is a plan view of the loading chassis moving mechanism before tape loading, FIG. 33 is a front view of the loading chassis moving mechanism, and FIG. Top view of loading chassis moving mechanism after loading tape when mounted FIG. 35 is a plan view of a loading chassis moving mechanism after tape loading when a tape cassette is used, FIG. 36 is a plan view of a supply reel drive mechanism, FIG. 37 is a side sectional view of a supply reel drive mechanism, and FIG. 38 is a supply reel. A plan view of the side tape guide member (after loading when the tape cassette is not mounted), FIG. 39 is a side sectional view of the supply reel side tape guide member, FIG. 40 is a main exploded perspective view of the loading chassis moving mechanism, and FIG. Figure is a plan view of the cassette detection mechanism, Figure 42 is a side view of the cassette detection mechanism, Figure 43 is a plan view of the cassette detection mechanism when the tape cassette is installed, and Figure 44 is a plan view of the tape guide member before loading. Fig. 45 is a front view of the tape guide member before loading, Fig. 46 is a plan view of parts on the loading chassis after loading, and Fig. 47 is a tape guide member after loading. Fig. 48 is a plan view of the tape guide member after loading the tape when using the tape cassette, Fig. 49 is a plan view of the tape guide member which comes into contact with the sub boat or the sub boat stopper during the tape loading, and Fig. 50 is the plan view. 49 is a view taken in the direction of arrow X, FIG. 51 is an exploded perspective view of the main portion of tape loading, FIG. 52 is a plan view of a conventional example of a guide drum and tape cassette overlap system, FIG. 53 is a VHS standard tape path diagram, Fig. 54 is a tape pass diagram for a VHS 4-head compact guide drum, Fig. 55 is a tape pattern diagram for a VHS compact guide drum and standard guide drum, and Fig. 56 is an 8 mm VT.
FIG. 57 is a plan view of the tape loading device when the small guide drum is adopted in the 8 mm VTR, and the standard guide drum and the small guide drum in R are shown. 1 …… Tape cassette, 34 …… S3 post, 35 …… T1 post, 36 …… T2 post, 37 …… T3 post, 38 …… T4 post, 53 …… Inclined guide boss, 55 …… Fixed post, 59 …
… Capstan, 60… Guide drum, 63… Drive chassis, 64… Loading chassis, 68… Chassis guide B, 69… Holder body, 96… Main gear, 97…
… Unload gear A, 98 …… Unload gear B, 99 ……
Road gear, 130 ... Main slide plate, 158 ... Relay gear, 164 ... Sub slide plate A, 172 ... Sub slide plate B, 223 ... Loading ring, 224 ... Loading gear, 225 ... Main boat, 228 ...... Sub boat.

Claims (3)

[Claims] 1. A guide drum is movable so that the position of the guide drum is relatively close to and separated from the reel shaft, and the guide drum and the reel shaft sandwich the tape stretched over the front surface of the tape cassette. A first position facing each other, a second position inside the tape cassette opening into which a tape pull-out post is inserted beyond the tension position of the tape stretched on the front surface, and at least a part of the guide drum is A tape loading device capable of moving beyond a tape cassette opening to a third position close to the reel shaft. 2. The tape loading device according to claim 1, wherein at the second position, the tape is wound around the guide drum by a predetermined angle so that the tape can be recorded and reproduced. 3. The tape loading device according to claim 1, wherein the guide drum is movable to a third position under the condition that the tape cassette is not attached to the main body of the device.