JPS61180956A - Tape loading device - Google Patents

Abstract

PURPOSE:To miniaturize a video tape recorder by providing a guide drum shift means which turns in one body with a tape lead-out post with a tape loading action, and at the same time, secures the linear approximation of a guide drum to a tape cassette. CONSTITUTION:A guide drum is turned in one body with a tape lead-out post with a tape loading action. Accordingly a loading ring and a ring mechanism to be provided around a guide drum are made unnecessary, therefore the occupting area of a tape loading mechanism is reduced. In addition, a guide drum shift means is provided to have the linear approximation and separation of the entire guide drum revolving mechanism to and from a tape cassette. This, the large-size parts like a conventional loading ring, etc. is omitted, and the factors which prevent the miniaturization of a video tape recorder is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape loading device for a recording/playback device such as a VTR that records or plays back by winding a tape around a guide drum incorporating a transducer. .

Conventional technology In order to wind tape around a guide drum, the tape stretched in front of the tape force center is pulled out, and a guide ring is placed around the guide drum as a guide means for the tape pull-out post that rotates around the guide drum. It was common to have one. There is also a tape loading method using a link mechanism using levers instead of a guide ring, but in either case, the guide drum was usually fixed to the board. On the other hand, as a type in which the guide drum is not fixed to the substrate, there is a parallel two-reel cassette equipped with a reel 103 shown in Japanese Patent Laid-Open No. 59-3635TJ.

The substrate 104 has erase heads 1o6. Capstan 1o6. audio head 1o7. Guide post AlO
3, Guide post) B109 is fixed retail. Reference numeral 110 denotes a loading ring, which is rotatably supported by the base plate 104 and integrally fixes the guide drum 111. Ring post C114.

A ring post D115 is also planted on the loading ring 11o. Further, the opening of the tape cassette 101 includes a drawer boss 116 and a pinch roller 117. When the loading ring 110 is rotated counterclockwise from this state by a motor or the like, the rotation center of the loading ring 110 is 01, and the rotation center of the guide drum 111 is G2, which is slightly deviated from the center. The loading operation ends with the positional relationship as shown in the figure. The guide drum 111 moves toward the tape cassette 101 by twice its eccentricity.

As a result, the area occupied by the tape path is reduced accordingly, contributing to miniaturization, and the guide drum 101 and its entrance and exit posts, such as the ring post A112 and the ring post D115.
It has the advantage that the configuration can be simplified because the relative relationships between the two do not change.

Problems to be Solved by the Invention In this conventional system, when the aim is to downsize, the contribution is at most 2 of the eccentricity of the guide drum and loading ring.
It's double. The guide drum before loading cannot be positioned beyond the tape stretched in front of the thermal tape cassette, so even if you try to set the guide drum position after loading closer to the tape cassette than in the conventional case, It just makes the loading ring bigger.

As a result, even if the tape path at the end of loading could be formed by moving the guide drum closer to the tape cassette, the area occupied by the loading ring and tape cassette would not be reduced, and this would not lead to miniaturization of the entire device. There are naturally limits to miniaturization. In addition, an increase in the size of the loading ring due to an increase in eccentricity causes problems in the arrangement of other components.

Means for Solving the Problems In view of the above-mentioned problems, the present invention aims to reduce the size of the VTR device by rotating the guide drum integrally with the tape draw-out post during the tape loading operation. A guide drum transport means is provided for bringing the tape linearly close to the tape cassette.

Operation By rotating the guide drum integrally with the tape pull-out post during the tape loading operation, there is no need for a loading ring or link mechanism around the guide drum, thereby reducing the area occupied by the tape loading mechanism. Furthermore, the guide drum transport means that moves the entire guide drum rotating mechanism linearly toward and away from the tape cassette eliminates the need for large parts such as conventional loading rings, and in principle allows for a smaller device. It is possible to remove the causes of limitations in the process.

Embodiment First, the structure of a tape cassette (8 mm tape cassette) used in this embodiment will be explained. The explanation will be continued with reference to Figures 2 to 12.〈0 Figure 2 is a perspective view seen from the top, and when the tape cassette 1 is not in use, a pair of built-in reels 2゜3 (Figure 4) wrapped around the tape 4
' are respectively covered by a rotatable front cover 5 and back cover 6.

7 is an opening into which a post or the like is inserted to pull out the tape 4' stretched on the front side; 8 is a reel lock for preventing the tape 4 from sagging; and 8 is the thickness of the tape 4.

Information such as type and length is expressed in the information window 9 by whether the hole is open or closed. 1o is a positioning hole for positioning the tape cassette 1 in the main unit. Reference numeral 11 designates a sensor hole into which a light emitting element for transmitting information on the beginning and end of the tape 4 is inserted. This light-emitting element forms an optical path in the direction of arrows 12 and 13, and has a light-receiving element on the thermally opposing surface.

6 to 8 show the front lid 5. The details of the opening/closing operation of the back cover 6 are presented in a sectional view. The front lid 5 is rotatably supported at both front ends of the side surfaces of the tape cassette 1. 5″
is a support shaft around which the front cover 5 rotates, and 5' is an arm that rotatably supports a support shaft 6' of the back cover 6. This back cover 6 has a projection 6'' which engages in a guide groove 14 formed in the side wall 7' of the opening 7 of the tape cassette 1. The lid mechanism configured as described above is biased by the elastic member to the state shown in FIG. 6, but the lid opens and closes in the state shown in FIGS. 7 and 8 due to an external intention. At this time, the back cover 6 is guided by a guide groove 14 for the purpose of opening and closing smoothly without coming into contact with the tape 4' contained therein.

9 and 10 are views of the left side surface of the front lid 5 in FIG. 2 near the five values, and are detailed views of the lid locking mechanisms of the front lid 6 and the back lid 6 described above. The front cover 6 is prevented from rotating around the support shaft 6"'. When the protrusion enters the hatching part in FIG. 10 and along the arrow direction in FIG. 9, the elastic member (
Release piece 1 of the lid lock claw 17 which is biased by the
7' and rotate the lid lock claw counterclockwise.

This releases the front lid 5 lock and allows it to be opened and closed freely.

The square hole 19 provided on the left side surface 5'' of the front cover 6 forms the optical path 12 of the light emitting element shown in FIG. 4 when the front cover 5 is open. It is closed. Hot theory This tape cassette 1 is
Since it is almost symmetrical, the left and right sides have the same functions, including blocking and opening the optical path. However, the lid locking mechanism is only on one side.

11 and 12 are perspective views showing an example of the lid opening/closing operation. In FIG. 11, the release piece 17' of the lid locking claw 1 is moved to the slide plate 20. The lid is intended to be unlocked by rotating it counterclockwise using the slide pin 21.

Figure 12 also shows the lid opening pin 2 provided on the main unit side.
2. Front lid 5. This shows a state in which the back cover 6 is released.

Next, it is generally well known as a guide drum miniaturization technology.
The method used will be explained with reference to FIGS. 13 to 16. FIG. 13 shows a standard system diagram of VH3/, in which the tape is wound around a guide drum 118 1900 times. On the other hand, the "rVHS video movie" shown in FIG. 14 maintains compatibility with the VHS' standard system shown in FIG. 13 with the following specifications.

Small diameter guide drum 122... Diameter is %, 4 heads sequential recording method Number of revolutions per rotation 180 Orpm x I = 270 Orpm Tape winding angle 19 o 0 x I = 28
6. Since FIG. 14 shows an rVHs video movie, the tape cassette 123 is an rVH3'-C cassette with a recording time of 20 minutes. In other words, according to this method, it is possible to easily reduce the diameter of the guide drum by 50%. 1st
Figure 6 shows a tape pattern that proves that both guide drums are compatible with each other. When this method is applied to an 8mm video guide drum, the result is as follows.

Standard guide drum 126...Diameter 40mm, 2
Head, 1800 rpm, tape wrapping angle 2210
(Video section 180'+PCM, t-dio section 3o0+other 11 degrees) Small diameter guide drum 60...Diameter 40X%=2
6.7 mm IJ, 4 heads sequential switching system, 5 rotations 270
Orpm, tape wrapping angle 221 x i = 3 31.5
” This small-diameter guide drum 60 and the 8mm tape cassette 1 are used to downsize the mechanism, but the guide drum 60 is located at CI, as shown in FIG.
It moves linearly to C2 and C3 and is absorbed into the tape cassette 1. Before loading, it is in the C1 position,
As the tape is wound around the guide drum 6o, the guide drum moves from C1 to C2. When recording and reproducing using the tape cassette 1, the housing size is reduced from D3 to D2 as shown in FIG. When carrying the VTR main body without attaching the tape cassette 1, the guide drum eO is constructed so that it can be stored from 01 to 02 to a position C3. Therefore, the casing has the smallest casing dimension Dl. Next, the tape path employed in this embodiment will be explained with reference to FIG.

The tape 4 fed out from the supply reel 2 is a rotating post S1 post 31.32 Post 33°S3 post 34
．． Tension post 32. It reaches the guide drum 6o via the erase head S8 and others. The guide drum 6o is inclined in the entry direction by a lead angle. Since the input direction is parallel to the tape stretched between the S3 post 34 and the guide drum 60, all tape guide members between the supply reel 2 and the guide drum 60, including the erase head 68, are placed on the bottom of the cassette. Vertical. 33 to guide drum 6o
The tape wound 1.5° is attached to T1 post 3 of the rotating post.
5. It is guided by the T2 post 3e, the T3 post 37, and the fixed post 56, and reaches the inclined guide post 63. Among these, the fixed post 66 differs from the other rotating posts in that it is made by winding tape in a helical shape, so that the twisting conditions of the tape change before and after the fixed post 65. Therefore, the guide drum 6O-TI post 35-
Twisting conditions are different between the tape 4a stretched between the fixed posts 66 and the tape 4b stretched between the fixed posts 55, T2 posts 3e, T3 posts 37, and the inclined guide post 53. Reference numeral 53 denotes an inclined guide post for eliminating the set twist according to the twist condition of the tape 4b, and the tape 4C emitted from this inclined guide post 53 is
The twist is eliminated and the tape runs on the same plane as the tape inside the cassette. T4 boss of subsequent rotating post) 38. T5 post 39 and capstan 69. The pinch roller 3o, like the tape guide member on the supply reel 2 side, is arranged perpendicular to the bottom surface of the cassette.

FIG. 18 shows a case in which the tape cassette 1 is not installed, for example, V
It shows the positional relationship of the loading members when the TR is being carried. The guide drum 60 is at the 03 position as explained in FIG. 17, and accordingly, the S3 post 34
, T1 post 35. Fixed post 55. T2 post 36
, T3 post 37° inclined guide post 63 is closer to the tape cassette 1 by a length component L'' in FIG. 17 compared to FIG. The other tape guide members, capstan 69, etc. are in the same positional relationship when viewed from the tape cassette 1 as in FIG. 17. The state in Fig. 18 is the 19th state.
This corresponds to the casing dimension D1 in the figure, and the state in FIG. 1 corresponds to the casing dimension D2 in FIG. 19.

Next, from FIG. 20 onwards, the specific mechanism will be explained.

FIG. 20 is a plan view of the entire device, and FIG.
This is the case where the housing size is D1 in FIG. The apparatus consists of reel drive blocks such as a supply reel stand 611 and a take-up reel stand 62, and a tape loading block centered around a guide drum 6°.

As shown in Figure 21, the chassis has a two-piece structure, with 63
64 is a drive chassis of the reel drive block described above, and 64 is a guide shaft 66a of a shaft housing 66 fixed to the back surface of the drive chassis 63.

66b, chassis guide A67, chassis guide 86
The guide drum 60 is slidably held by the guide drum 60.
It is a loading chassis on which etc. are placed. The cassette holder mechanism of this device will be explained with reference to FIG. 22. The imaginary line in FIG. 22 shows the cassette attachment attachment locus. The tape cassette 1 is inserted into the cassette holder in the direction of the arrow. The reason why the device is inserted in the opposite direction from the conventional method is that the device is almost the same size as a cassette, so it can be constructed in a small space, and it is easy to obtain rigidity because it has a simple fulcrum of rotation.

FIG. 23 shows a side view of the cassette in the cassette up state, and FIG. 24 shows a side view of the cassette down state. FIG. 12 shows a plan view of the cassette down. The holder main body 69 has a right side plate 70 on both sides. The left side plate A1 is supported by four guide pins 72 and 73 that are pivotally supported by the holder main body, and the elongated guide hole 7 that engages with the four guide pins 72 and 73.
0a, 70b.

It is held by 71a and 71b so as to be able to slide up and down a little. The guide pin 72 also serves as a fulcrum for the cassette presser spring 74, and one end of the cassette presser spring 74 is connected to the right side plate 70. The other end of a cassette holding pin 75 integral with the left side plate 71 is in contact with the holder main body 69. Therefore, the right side plate 70. The left side plate 71 is biased in a direction to be separated from the holder main body 69. Reference numeral 76 denotes a holder fulcrum, which is fixed to a right side board (not shown) and a left side board 77 fixed to both sides of the drive chassis 63, and engages with holes on both sides of the holder body 69 to support the holder body 69. Supports rotatably. Holder fulcrum 76 of left board 77
is provided with a holder spring 78, one end of which engages with a fixing portion 77a of the left side board 77 and the other end of which engages with a cam lever fulcrum pin 79 fixed to the holder main body 69, so that the holder main body 69 In the figure, it is biased clockwise. A cam lever 80 rotatably supported by a cam lever fulcrum pin 79
As shown in FIGS. 24 and 26 (view of arrow F in FIG. 24), the projection 80a has an abbreviated shape and engages with the cam groove 77b formed on the left board 77; A cam pin 82 is provided which engages with a long hole 81a of a relay lever 81 shown in FIG. The relay lever 81 is rotatably supported by the guide pin 2, and one end of the relay lever 81 is connected via the lid release lever 83 and the release lever pin 86, which are slidably supported on the side surface of the left side surface 71 by a pin A84 and a pin B85. engaged. Lid lock release lever 8
3 and the relay lever 81 are as shown in FIG. 28, and the lid release lever 83 has a U-shaped protrusion 83a formed at its lower part. Reference numeral 87 denotes a lock claw whose claw portion 87a engages with a lock bin 88 implanted in the holder main body 69 to hold the cassette holder and tape cassette 1 in a state in which the tape can be pulled out. lock claw 8
7 is the lock spring 89 in the cassette setup state shown in FIG.
The 24th
The operation of the lock claw 87, which is biased clockwise by the lock spring 89 and the claw portion 87a engages with the lock bin 88 in the case-down state in the figure, will be described later in the tape loading operation.

The operation of the cassette holder configured as above will be explained next.

Fig. 23 Direction of holder body 6 in cassette setup state
9, it is urged downward as far as the long holes of the guide holes 70a and 70b allow. The lower end of the cassette holding bin 75 and the right side plate 70. Since the distance L1 between the cassette holder of the left side plate 71 and the section Toe, 71c is slightly larger than the thickness L2 of the tape cassette 1, there is no load on the cassette presser spring 74 when the tape cassette 1 is inserted. When the holder main body 69 is pushed and the cassette holder is rotated about the holder fulcrum 76 against the holder spring 78, the cam lever 8
0 is rotated counterclockwise around the cam lever fulcrum pin 79 in FIG. 23 by the guided cam groove 7 of the left board π. Then, the relay lever 81 is rotated clockwise around the guide pin 72, and the lid release lever 83 is further rotated around the guide pin 72. It is guided by pin B85 and slid upward. Although the protrusion 83a of the lid lock release lever 83 is located at a lower position than the bottom surface of the tape cassette 1 in FIG. 23, by sliding it upward, it is removed as shown in FIG. Intrudes into a part of the tape cassette 1. This intrusion portion corresponds to the position of the lid locking mechanism explained in FIGS.
The lid lock pawl 17 is rotated counterclockwise around the nail skin point 16 along the inclined portion 83b of the protrusion 83a.

The protrusion piece 16 that was engaged with a part of the lid lock claw 17 is unlocked, and the front lid 6 can be opened. This series of operations is shown in FIG. 22 as tape cassette 1 moves from Pl to
At position P2, the lid opening pin 90 comes into contact with a part of the front lid 6 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 implanted in a stopper plate 91. The opener 93 has an opener return spring 94
It is urged clockwise by this and comes into contact with a part of the stopper plate 91 at the position indicated by the imaginary line in FIG. 22, thereby stopping. Therefore, when the tape cassette 1 moves from P2 to P3, the front lid spring (
Since the spring force of the opener return spring 94 is weaker than the opener return spring 94 (not shown), the opener 93 rotates counterclockwise, and one end of the opener 93 contacts the stopper plate 91. When the cassette holder is further rotated, the front lid 5 opens as shown by the solid line, and the tape 4 can be pulled out.

When the position shown by the solid line is reached, the lock pin 88 engages with the lock pawl 87, 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) installed in a plurality of drive chassis 63, and the tape cassette 1 is positioned in the front-rear, left-right direction, and height. The position of the cassette holder positioned by the aforementioned lock pin 88 and lock pawl 87 is at a position where the holder main body 69 is rotated further than the position where this tape cassette 1 abuts the cassette positioning pin, so the difference is Accordingly, the tape cassette 1 can be strongly positioned by urging the tape cassette 1 downward by the cassette pressing spring 74 via the cassette pressing pin 76. The reason why the lid opening pin 90 is configured to rotate is that the operation of the opener 93 is used to detect the presence or absence of a cassette. When only the cassette holder is mounted without a cassette, the opener 93 does not rotate from the imaginary line position, so it is possible to detect the presence or absence of a cassette.

Next, the specific mechanism of the tape loading drive mechanism will be explained from FIG. 16 onwards. Reference numeral 96 denotes a holder gear whose center is the holder fulcrum 76 in FIG. 23, which rotates integrally with the holder main body 69. This holder gear 95 meshes with a main gear 96 as shown in FIG. 30, and further includes unload gear A97, unload gear B98. road gear 99
Power is transmitted to. This load gear 99 is a main slide plate 1 provided on the loading shear 764.
30 to perform a tape loading operation. The main gear 96 has a gear lock pawl 131
is integrally equipped with a gear lock plate 133 that is rotatably supported around a lock claw shaft 132, and the main gear shaft 1
37 is the center of rotation. The gear lock pawl 131 is urged by a gear spring 136 in a direction to engage a gear lock pin 134 implanted in the unload gear A97.

The unloading gear A97 has a notch partially in the radial direction, and is provided with a generally fan-shaped drum portion 97a as shown in FIG. It is wound around 97a.

Since the unload wire 138 is engaged with an unload spring 140 having one end fixed to the left side board 77 via a wire guide pin 139, the unload gear A97 is biased clockwise. Unload gear B98 is
Load gear pin 141 (holder lock release pin 142 and load spring plate) 14 protruding toward the left board 77
3 is provided with a plate pin 144 that rotatably supports the plate. The load gear 99, which is disposed coaxially with the unload gear shaft 160 that is the center of rotation of the unload gear B9El, has a substantially linear groove 99a on the unload gear B98 side. , connect one end to the road gear 99
A load spring 146 is fixed to the load spring plate 143 and has its other end locked to a spring locking pin 146 of the load spring plate 143. Also, the load gear 99 is the unload gear B98.
There is a load gear lock pin 147 that protrudes in the direction, and comes into contact with the locking part 143a of the load spring plate 143,
The load spring 146 is held stretched by a predetermined amount. The load gear lock pin 147 is rotatably supported by the left side substrate 77 and engaged with a load gear lock plate 149 that receives a clockwise biasing force from a load gear lock spring 148. Therefore, Road Gear 99
is prevented from rotating clockwise. Figure 31 shows
In the cassette amplifier state, the positional relationship of the cassette holder corresponds to that of FIG. 23. FIG. 32 is a diagram of the cassette in the down state, and the positional relationship of the cassette holder matches that of FIG. 24.

Next, the loading chassis 64 slide mechanism' connected to the load gear 99 will be explained with reference to FIG. 33rd
This figure shows the positional relationship before tape loading, and corresponds to the loading drive mechanism shown in FIGS. 31 and 32. The explanation will be given with reference to the exploded perspective view of the main components shown in FIG. 29. The chassis guide B68 is fixed to the left end of the loading chassis 64 and slides while being guided by the guide shaft 66b. The chassis guide 868 also supports a mode switching slide plate 151 by means of a slide plate guide pin 152 so as to allow slight sliding. A mode gear 155 that rotates integrally with the mode arm 153 meshes with the rack portion 151a of the mode switching slide plate 161. Furthermore, this mode arm 153
The mode switching pin 156 implanted in is engaged with the guide hole 68a of the chassis guide B68. Mode arm 163. Arm shaft 15 which is the center of rotation of mode gear 155
The main slide plate 130 on which the 4 is installed is held slidably relative to the chassis guide Bes through two elongated holes, and has a mode spring 157 on the top thereof which is engaged with the mode switching slide plate 161. It is fastened. In the main slide plate 130, the rack A1 soa meshes with the load gear 99, and the rack B13ob meshes with the large diameter portion 168a of the relay gear 168. 159 rotates around the lock plate support shaft 160 of the left board A7;
On the mode pin 161 of the mode switching slide plate 151,
The distal end portion 169a is a mode-lock plate that can be selectively abutted.

A guide drum drive mechanism connected to this main slide plate 130 will be explained in FIG. 36. FIG. 36 is a diagram showing the positional relationship 2 before tape loading, similar to FIG. 33.

FIG. 37 is a sectional view taken along A-B-C-D-E-F in FIG. 36. For ease of understanding, FIG. 37 also shows related parts such as the drive chassis 63. The relay gear 158 is rotatably supported by the relay gear shaft 162 implanted in the drive shear 63. The large diameter portion 158a is attached to the rack B130b of the main slide plate 130, and the small diameter portion 16 is attached to the rack B130b of the main slide plate 130.
8b is a slide guide pin 163 attached to the drive chassis 63.
It meshes with the rack of the sub-slide plate A164 guided by. A rack part 172a that is a sub-slide sheet metal that shares the slide guide bin 163 as a guide shaft, a spring hook part 172b bent in a U-shape, and a select lever 166.
Cam portion 172c that comes into contact with select pin 167 at one end
Consists of. The spring hook supports the slide lock plate 168 so as to be slightly movable on the side opposite to the portion 172b, and a loading charge spring 173 is disposed between the slide lock plate 168 and the slide lock plate 168.
68 is biased in the M direction as far as the elongated hole 168a allows. The slide lock plate 168 rotatably supports the slide lock lever 169, and applies a clockwise urging force to the slide lock lever 169 by a slide lock spring 170 provided on its pivot shaft. Since the claw portion 169a of the slide lock lever 169 is engaged with the slide lock pin 171 provided on the sub-slide plate A164, in this state, the sub-slide plate A16
4 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 is the drum drive gear B1.
74 small diameter gear 174a, drum drive gear B17
The No. 4 large diameter gear 174b meshes with the drum drive gear C175. Note that these drum drive gears A
165. B174. C176 is provided on the loading shear 764 as shown in FIG. On the other hand, the large diameter portion 168a of the relay gear 168 is shown in FIG.
As shown in the diagram, small diameter gear part 1 of reel drive gear A176
The small diameter portion 158b of the relay gear 168 that meshes with 76a and is separated is the large diameter gear portion 177a of the S1 post drive gear 177.
Both are compatible. The large diameter gear portion 176b of the reel drive gear A176 meshes with the small diameter gear portion 178a of the reel drive gear B178, and the large diameter gear portion 178b meshes with the reel drive gear C179, resulting in increased speed transmission. The reel drive gear C179 is a slip holder 1 rotatably supported by a reel drive gear shaft 180 fixed to the shirt tonneau 1 housing 65.
81B183 and reel drive gear D18
It forms the center axis of rotation of 4. Reel drive gear D1
84 is provided with a reel drive clutch spring 185 (compression spring) between the reel drive gear C179.
The driving force of the reel drive gear C179 is generated by the friction member B1.
83'! i to the reel drive gear D184. In addition, the reel drive gear shaft 18o has
A reel drive plate 187 is provided with a rotatable reel drive gear E186 that meshes with the reel drive gear D184 and is biased by a plate spring 188 to the friction member A182. Therefore, when a counterclockwise driving force is generated in the reel drive gear C179 in FIG. It rotates until it meshes with the gear portion 61a of the reel stand 61, and winds up the tape that has already been pulled out onto the supply reel 2 during the relay gearing operation. Next, the S1 post 31, S2 post 33, which connects to the 81 post drive gear 177. The moving mechanism of the erase head 58 will be explained with reference to FIGS. 42 to 44.

The S1 post drive gear 177 shares its center of rotation with the select lever 166 in FIG. 36, and as shown in FIG. A select lever 166 is provided on the lower large diameter portion of the gear shaft 192 and is biased clockwise by a lever spring 193 (FIG. 36), and an 81 post drive gear 177 is rotatably supported on the upper small diameter portion. The S1 post gear 194 that meshes with the S1 post drive gear 177 is integrated with the S1 post 31 and rotates around the S1 post shaft 195. Erase boat 19 to which the erase head 68 and S2 post 33 are fixed
6 is a boat gear 1 having two collars 198 inserted into long holes 197a of a board guide 197 and a rack.
99 and a port holder 200 are screwed from the bottom surface of the port holder 200. For this reason, erase hesodo boat 1
96, boat gear 199, and boat presser foot 2oO are slidably held by boat guide 197. Two collars 201 are similarly inserted into the other elongated hole 197b of this boat guide 197, and a 53 boat holder 203 is held by a boat holder 202 so as to be slidable relative to the boat guide 197. The port guide 197 is fixed to the drive chassis 63 by two collars 204, and a boat gear 199 configured therein is engaged with the S1 boss gear 194 via an erase relay gear 205. S3 boat holder 20
3 [, 33 The S3 boat 206 with the post 34 fixed is attached to the boat spindle 20? Although it is rotatably supported at the center, the S3 bow) 206 is normally biased counterclockwise by the boat spring 208, so that the protrusion 206a of the S3 bow) 206 is attached to the 83 boat holder 203. It is held in a position where it touches the side. An S3 boat spring 209 is housed in the U groove of the S3 boat holder 203.
Sub slide plate B172 and S3 bottom holder 203
stretched between. Due to the tensile force of the port spring 209, the spring hook of the sub-slide plate B172 is held at a position where the end surface portion 172d of the portion 172b and the groove open end surface portion 203a of the S3 bottle holder 2o3U are in contact with each other. Reference numeral 32 denotes a tension post, which is rotatable around a tension post support shaft 21° and biased in the counterclockwise direction by a tension spring 211. This tension post 32 is S1
It follows the rotation of the post 31, and the post arm 212 of the tension post 32 can come into contact with the holder portion 31a of the S1 post 31. FIG. 42 is a diagram showing the positional relationship when the tape cassette 1 is not installed.

45 to 47 show an example of a cassette detection means, which determines whether the tape cassette 1 is loaded and automatically switches the amount of movement of the guide drum. In order to make this determination, this embodiment employs a method of detecting the lower part of the rear surface of the tape cassette 1. Thermal theory This method does not place any particular emphasis on this position, and many detection methods can be considered. An example of this will now be described. Fourth
5 is a plan view of the cassette detection means when the tape cassette 1 is not installed, and FIG. 47 shows the tape cassette 1 when it is installed. The actuator 2 is attached to the shaft housing 66.
An actuator holder 214 that rotatably supports the actuator 13 is fixed, and a lock release arm 216 is rotatably supported near the actuator holder 214. The lock release arm 215 is biased clockwise by the lock release spring 216, and the release pin 217 provided at the tip of the arm and extending downward is connected to the slide lock lever 169.
The slide lock lever 169 is rotated counterclockwise against the slide lock spring 170. 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 sub-slide plate are rotated. The slide lock bin 171 of A164 is disengaged.

The arm portion 213a extending downward of the actuator 213 is in contact with the end of the lock release arm 216, and is normally held in a clockwise rotated position by the biasing force of the lock release spring 216 as shown in FIG. be done. The head portion 213b of the actuator 213, which extends upward in the opposite direction to the arm portion 213a, is in the cassette mounting space in this state, but when the cassette is not mounted, the position indicated by the solid line is maintained. However, in the case of the tape cassette 1, the actuator 213 rotates counterclockwise due to the cassette insertion operation, and its arm portion 213a rotates the lock release arm 215 counterclockwise. Then, as shown in FIG. 47, the slide lock lever 169 is released from the restriction of the lock release arm 215, so it is rotated clockwise by the slide lock spring 170, and the claw portion 169a of the slide lock lever 169 and the sub slide plate A
164 slide lock pins 171 are engaged.

Next, the tape loading mechanism near the guide drum 60 will be explained. 48 and 49 are layout diagrams of the main parts before tape loading, and FIG. 49 is a view taken in the direction of arrow F in FIG. 48. A drum holder 218, which will be described with reference to the exploded perspective view of FIG. 65, is integrally formed with the loading chassis 64 and is inclined at a predetermined angle in the Y direction of FIG. 50 with respect to the loading chassis 64. Two guide rollers 219 are rotatably supported on the upper surface 218a of the drum holder 218, and a roller plate 221, which is movable to a certain extent around a center pin 220, rotatably holds one guide roller 222. It is recognized. These three guide rollers 219, 222 are
The V-shaped portion 2 of the loading ring 223 is approximately diamond-shaped and is fixed and integrated with the guide drum 6o at a certain angle of inclination (a different inclination from the drum holder).
23a to rotationally guide the guide drum 6o. The loading gear 224 is also fixedly integrated with the guide drum 60 at a certain angle (the same angle as the relative angle between the loading ring 223 and the guide drum 6o). The rotation plane of the loading ring 223 and the loading gear 224 is a plane parallel to the upper surface 218a of the drum holder 218. For this loading ring 223, the T1 post 36. Fixed post 55, T2 post 36
The main boat 225 is equipped with a boat fulcrum pin 226.
It is rotatable around the center and held in a clockwise biased state by a main boat spring 227. Also, behind the main boat 225, there is a T3 post 37. A sub-boat 228 equipped with an inclined guide post 53 is configured to be guided into the elongated hole of the guide portion 223b of the loading ring 223, and is held in a state where it is biased toward the main boat 225 by a sub-boat spring 229. loading ring 2
23 is inclined in the Y direction as mentioned above, so the 49th
When shown in the diagram, it appears to be tilted as shown in the diagram, but the sub-boat 22
The guide portion 223b that guides the loading ring 223 has a plane that is inclined relative to the loading ring 223, so in this figure, on the contrary, it is guided horizontally. 230 is a sub-boat holder, which is screwed from below to sub-boat 228.
is held in the guide plate 223b so as to be slidable along the elongated hole. Reference numeral 231 denotes a sub-boat stopper which is fixed to the loading chassis 64 and is abutted by the tip end 228a of the sub-boat 228 to position the sub-boat 228 during the loading process. A main boat stopper 232 positions the main boat 226 in conjunction with a stopper plate 234. 235 is S3
The S3 boat guide guides the post 34 and also performs final positioning, and the downward protrusion of the post 34a of the S3 post 34 shown in FIG. 43 is engaged with and guided by the U groove 235a of the S3 boat guide. What has been described above is one configuration example of the present invention.

Next, the operation will be explained based on this configuration example in relation to the operation of the aforementioned cassette holder. First, it is assumed that the tape cassette 1 is used, 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. With this operation, the holder gear 96 rotates in the special training direction from the position shown in FIG. 31 to the position shown in FIG. 32. The holder gear 95 meshes with the main gear 96, and since the main gear 96 is not connected to the unload gear A97 via the gear lock pawl 131, the main gear 96 and the unload gear A97 are in the position shown in FIG. and rotate counterclockwise. Since the unloading wire 138 is accordingly wound around the drum portion 97a, the unheating spring 140 is stretched and the unloading gear A
A moment is accumulated to rotate 97 clockwise.

Since the unloading gear B98 also meshes with the unloading gear A97, it rotates by a predetermined angle clockwise in conjunction with the insertion operation of the cassette holder and reaches the position shown in FIG. 32. However, since the load gear lock plate 149 prohibits clockwise rotation of the load gear 99 as shown in FIG.
The load spring 146 is stretched. Since the load spring 146 is formed within the groove portion 9a, it is wound toward the unload gear shaft 150 along the approximately linear groove portion 99a. This is because the load spring 146 is larger than the rotation angle of the unload gear B98.
This is to gradually reduce the change in the length of the load spring 146, thereby minimizing the change in the length of the load spring 146 and reducing the load on the cassette holder rotation by the operator. Unload gear A97
It is for the same reason that the drum portion 97a is modified to have a substantially fan shape to reduce the amount of displacement of the unload spring 140. Now, as the load spring 146 continues to rotate clockwise while being charged, the load gear pin 141 of the unload gear B98 moves to the 32nd position near the end of the rotation process.
As shown in the figure, it contacts one end of the load gear lock plate 149 and rotates the load gear lock plate 149 counterclockwise against the load gear lock spring 148. The load gear 99 was prevented from rotating by the load gear lock plate 149, but this releases it and the load gear 99 is prevented from rotating.
is rotated clockwise by the spring force of the load spring 146. The lock pawl 87 is biased counterclockwise by a lock spring 89, but in the cassette setup state, the lock pawl 87 is biased counterclockwise by a lock spring 89.
As shown in the figure, the holder candle release bottle 142 is locked by the locking claw 87.
Due to the spring force of the unload spring 140, it is rotated clockwise and stopped. However, since the unload gear B98 rotates clockwise in conjunction with the insertion operation of the cassette holder, the lock pawl 87 rotates counterclockwise and can engage with the lock pin 88. (Fig. 32) As explained above, main gear 96. Unload gear A97
．． The unload gear Bss rotates in conjunction with the cassette holder insertion operation, but only the load gear 99 is unlocked immediately before the cassette holder insertion operation is completed, and is rotated clockwise by the load spring 146. . This is because the rotation of the load gear 99 is directly connected to the tape loading operation, so it is necessary that the tape cassette 1 is inserted in a predetermined position and that loading is possible. The difference is that after the tape cassette 1 is inserted, the load gear 99 is unlocked by pushing down the cassette holder a little more because of the spring charging operation of the cassette presser spring 74. When the load gear 99 is unlocked and rotated clockwise, the main slide plate 130 moves from the position shown in FIG. 33 to the position shown in FIG. 39. By moving the main slide plate 130, the relay gear 158 is rotated,
The sub-slide plate A164 is moved in the opposite direction to the main slide plate 130 (see FIG. 39). When the tape cassette 1 is installed as shown in FIG.
3 rotates counterclockwise (as shown by the imaginary line), thereby the slide lock lever 169 rotates clockwise in FIG. 45 and engages with the slide lock pin 171. As a result, the sub-slide plate B172 moves together with the sub-slide plate A164.

As shown in FIG. 39, the select pin 167 that had been in contact with the cam portion 172c at the tip of the sub-slide plate B172 is moved by the cam portion 172c as the sub-slide plate B172 moves.
is released and rotated clockwise by lever spring 193. The select lever 166, which has the select pin 167 at one end, has a U-shaped portion 166a at the other end.
Because it is engaged with the mode lock plate 159 in Figure 3,
When the select lever 166 rotates clockwise, the mode lock plate 159 rotates counterclockwise to the position shown in FIG. 35. This rotation of the mode lock plate 169 is performed at the beginning of the movement of the main slide plate 130, so if the main slide plate 130 continues to move further, the mode switching slide plate 161 provided on the chassis guide B68 will change the mode. Since it is located in the movement space of the pin 161, its tip 159a engages with the mode pin 161. In this way, the mode switching slide plate 151 is stopped from moving by the mode lock plate 159, but the mode gear 165 is stopped together with the main slide plate 130.
Since the arm shaft 164, which is the center of rotation, moves, the mode gear 155 rotates clockwise, as shown in FIG. Therefore, the chassis guide B68 is spaced apart from the main slide plate 130, and the mode spring 157 stores and is held with a large spring force. In this way, the rotation of the road gear is directly transmitted to the main slide plate 130,
The chassis guide Bes will move less than the main slide plate 130. This means that the amount of movement of the main slide plate 130 is the same as that of the guide drum 6 in FIG.
The amount of movement of the chassis guide Bsa this time is the same as the amount of movement of the guide drum 6o from the position of 01 to the position of the imaginary line of 02. So it becomes. In other words, the relative separation amount between the main slide plate 130 and the chassis guide B68 due to the clockwise rotation of the mode gear 156 is the first
This is the value of L in Figure 7.

Next, the operation of the relay gear 158, which is rotated counterclockwise by the main slide plate 130, will be described.

As mentioned above, the sub-slide plate B172 moves integrally with the sub-slide plate A164 in the opposite direction to the main slide plate, but the amount of this movement is reduced by the relay gear 158, and the value is as shown in FIG. The length is L. Therefore, since the drum drive gear A165 is provided on the loading chassis 64, it moves by the same amount as the chassis guide Bes, but the sub-slide plate B172 also moves relatively, changing from the position shown in FIG. 36 to the position shown in FIG. 39. . This sub slide plate B172 and drum drive gear A16
Drum drive gear A obtained by relative movement of 5
The rotation of 165 is transmitted to drum drive gear B174 and drum drive gear C175, causing drum drive gear C175 to rotate clockwise.

On the other hand, the rotation of the relay gear 168 is
1 post 31. S2 post 33. It also serves to move the erase head 58. The S1 post 31 rotates counterclockwise, and the S2 post 33. The erase head 58 moves toward the tape cassette from the position shown in FIG. 48 to the position shown in FIG. 52. The tension post 32 is located at the S1 post 33.
When the S1 post 33 rotates counterclockwise, the tension spring 211 rotates counterclockwise accordingly. In addition, the S3 boat holder 203, which is connected to the sub-slide plate B172 by the S3 port spring 209, moves as the sub-slide plate B172 moves.
The erase head 58 moves in the opposite direction. During this movement, the S3 boat 206 is initially urged against the side of the 83 boat holder 203 by the boat spring 208, but the S3 boat guide 236 provided on the loading plate 64
is relatively close to 83 boat 206, and S3 post 34
206 in a clockwise direction to approach the guide drum 6o. eventually,
The S3 boat guide 235 is biased and positioned at the end of the U groove 236a by the boat spring 209. The tape loading operation of the tape guide member from the supply reel 2 to the guide drum 6o is thus completed as shown in FIG. 52. Next, the operations of the guide drum 6o, main boat 226, and sub boat 228 will be explained. Since the loading shear 764 is integrated with the chassis guide B6B, when the load gear 99 and the main slide plate 130 move by a predetermined amount (LB), the relative position with respect to the tape cassette 1 changes by LA in FIG. 17. Therefore, the guide drum 6o changes from the position C1 in FIG. 17 to the position C2. Along with this movement, the guide drum 60 receives a counterclockwise rotational force because the rotation of the drum drive gear C176 is transmitted to the loading gear 224. Since the main boat 226 is biased counterclockwise by the main boat spring 227, the T1 post 35.
The fixed post 65 and T2 post 36 are shown in Figs. 48 and 49.
Located at the location shown in the diagram. Sub-Boat) 228 is also Sub-Boat Spring 2
29 to the main boat 226 side, T3 post 37. before loading. Inclined guide post 63
For example, it is located in the opening of the tape cassette 1 as shown in FIGS. 48 and 49. Now, from this state, loading gear 224
Do not rotate the loading chassis 6 counterclockwise.
4 towards the tape cassette 1 side, approximately 160
When the sub-boat 228 has rotated 0 times, the tip 228a of the sub-boat 228 comes into contact with the sub-boat stopper 231 provided on the loading chassis 64. The plan view is shown in Figure 53.
FIG. 4 shows a view taken along the X arrow in FIG. 53. Since the rotation center of the loading ring 223 is inclined at a predetermined angle in the Y direction as described above, each post from the T1 post 35 to the inclined guide post 63 is at the highest position before loading as shown in FIG. , in FIG. 53, it is considerably lower than the tape 4 as shown in FIG. 54. When the loading gear 224 is further rotated from this state, the sub-boat 228 is guided by the elongated hole of the guide portion 223b of the loading ring 223 against the sub-boat spring 229 and stopped at that position. At this time, since the guide portion 223b of the loading ring 223 is a plane inclined at a predetermined angle with respect to the loading ring 223, the sub-boat 228 is
It rises and when loading is finished, T3 post 37. The inclined guide post 53 changes from the position shown by the solid line to the position shown by the imaginary line. On the other hand, in the main port 225, as the loading gear 224 rotates, the protrusion 226a of the main boat 225 comes into contact with the right side surface 232b of the protrusion 232a provided at one end of the main boat stopper 232 (
(See Figures 50 and 65). Thereafter, as the loading gear 224 rotates further, the main boat 225 begins to rotate counterclockwise about the boat fulcrum pin 226 against the main boat spring 227. main boat 225
The protrusion 226a has a contact portion with the convex portion 232a of the main boat stopper 232 that extends from the right side portion 232b to the upper side portion 2.
Move to 32C. The main boat 225 is thereby rotated approximately 120 degrees, and the T1 post 35 approaches the guide drum as shown in FIG. Main bow at this time) 225
1"j, and is positioned by the main boat stopper 232 and the stopper plate 234.

In this way, the loading gear 224 stops, but the sub-slide plate B
Since the amount of rotation of drum drive gear A166 by 172 is set somewhat larger, loading gear 22
4 stops, the stroke of the loading chassis 64 moving toward the tape cassette 1 side is the sub-slide plate B.
172 to the tape cassette 1 side. 0 Sub-slide plate A164, whose relationship diagram is shown in FIG. Because it is engaged with the slide lock lever 169,! The varnish slide lock plate 168 is the sub-slide plate A16.
4, the loading charge spring 173 extends and biases the sub-slide plate B172 in the PP direction.

This biasing force biases the loading gear 224 in the loading direction, in other words, it biases the main boat 226.
This provides a force that firmly presses against the main boat stopper 232. The guide drum 6o is inclined as shown in FIG. 48 before loading, but at the end of loading, it is inclined in the entry direction by the lead angle as shown in FIG.
It is set to satisfy the requirements of "Coloring Tape Bath". Also, pinch roller 30, T4 boss 3
B.

Although the explanation of the operation of the T5 post 39 and its movement configuration has been omitted, since both posts are perpendicular to the drive chassis 63,
It is not difficult to move the sub-slide plate A164 to a predetermined position using conventional means using the movement of the sub-slide plate A164 as an input. FIG. 52 shows the loading completed in this way.

Next, the tape unloading operation and cassette ejecting operation will be explained. When a cassette removal command is received, a motor (not shown) causes the gear lock pawl 1 in FIG.
The lock release portion 131a of 31 receives a force in the FA direction, rotates the gear lock pawl 131 clockwise against the gear spring 136, and releases the engagement with the gear lock bin 134. Then, the unload gear A97
0, the unload gear Bsa rotates clockwise and the unload gear Bsa also begins to rotate counterclockwise. Unload gear 89B
When the main slide plate-13 rotates counterclockwise, it is stretched between the unload gear Bsa and the load gear 99, and the main slide plate-13
The load spring 146 that biases the load spring 146 in the loading direction loses its force when the locking portion 143a of the load spring plate 143 comes into contact with the load gear lock bin 1470. Therefore, from now on, with the positional relationship in which the locking portion 143a of the load spring plate 143 and the load gear lock bin 147 come into contact, the unload gear Bsa and the load gear 99 integrally rotate counterclockwise, and finally, the load gear The lock pin 147 climbs over the claw portion of the load gear lock plate 149, resulting in the positional relationship shown in FIG. 31. At this time, unload gaff 898
When the load gear lock plate 149 is turned 0, the load gear lock plate 149 is no longer biased counterclockwise by the load gear pin 141 and can be rotated by a predetermined amount under the bias of the load gear lock spring 148. Guarantee becomes possible. As the load gear 99 rotates counterclockwise, the main slide plate 130 also starts moving in the unloading direction.

At this time, due to the mode spring 16 stretched between the main slide plate 130 and the mode switching slide plate 151, the mode switching slide plate 161 and the main slide plate 130 approach each other, so that the mode gear 165 moves counterclockwise by 180 degrees.
The mode switching bin 166 rotates approximately .degree., and the rotation stops when the mode switching bin 166 comes into contact with the lowermost end of the guide hole 68a of the chassis guide Bes. When rotation stops, main slide plate 1
30 and chassis guide B68 move together in the unloading direction. S1 post 31.32 post 33. The erase head 58 also performs an unloading operation, which is the opposite of loading, in conjunction with the main slide plate 130. Since the post arm 212 comes into contact with the holder portion 31a of the S1 post 31, the tension post 32 similarly rotates clockwise as it is pushed by the clockwise rotation of the S1 post 31, and together with the S1 post 31, the tension post 32 rotates clockwise. It is stored in the opening of the cassette 1. Since the S3 boat holder 203Fi equipped with the S3 post 34 and the sub-slide plate B172 move toward the chief cassette 1 side together with the sub-slide plate A164, the spring hook of the sub-slide plate B172 is connected to the end surface 172d of the portion 172b and the S3 point holder. The 203U groove open end surface portion 203a moves toward the reel in the abutted positional relationship. The S3 boat 206 is held in a position where it abuts against the side of the S3 boat guide 203. loading gear 2
24 also rotates clockwise due to the rotation of the drum drive gear A1660 caused by the relative movement of the sub-slide plate B172 and the drum drive gear A166. As the main port 225 disengages from the convex portion 232a of the main port stopper 232, the main port spring 2
27, the rotation is returned to the clockwise direction. sub port 22
8 is also connected to the main port 22 by the sub port spring 229.
After moving to the 6 side, the main port 226 and the loading ring 223. It rotates clockwise together with the guide drum eO, returns to the position shown in FIG. 48, and stops. Also, T4 post 38° pinch roller 30, Ts post 39
It also returns to its predetermined position in conjunction with this unloading operation.

A supply reel stand 61 drive mechanism is used to absorb tape slack caused by this unloading operation. This is shown in FIG. 40. As mentioned above, since the reel drive plate 187 has a friction transmission function, the counterclockwise rotation of the reel drive gear C179 due to the clockwise rotation of the relay gear 168 is caused by the reel drive plate 187 in the counterclockwise direction, and the reel drive gear E18 meshes with the reel drive gear D184.
6 is meshed with the gear portion 61a of the supply reel stand 61. At this time, the reel drive gear D184 is frictionally transmitted from the reel drive gear C179, so the change in the required rotation speed of the reel stand due to the difference in the amount of tape wound on the supply reel 2 is the required rotation speed when there is no tape at all. If you set it to +α, the excess will be absorbed by the slip. Immediately before the unloading operation ends, unload gear B9B
The holder lock release pin 142 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 to the second position by the holder spring 78.
Rotate clockwise and stop as shown in Figure 3. During this rotation process, the front cover 6. The back cover 6 is closed and e cannot be opened.

Furthermore, the main gear 96 meshed with the holder gear 96 due to this rotation is shown in FIGS.
Rotate clockwise as shown. Then, the gear lock pin 134 of the unload gear 897 and the gear lock claw 131
is engaged just before the cassette holder rotation ends, and returns to the positional relationship shown in FIG. 31. Opener 93 also has opener return spring 9
At step 4, rotate clockwise to return. Furthermore, the actuator of the cassette detection means in FIG. 46 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. The binding of B172 is released. Everything is now back to the state it was in before the cassette was installed.

Next, a case where the tape cassette 1 is not housed in the cassette holder but the cassette holder is attached to the main body of the apparatus, for example when the main body of the apparatus is carried, will be explained.

The explanation will focus on the differences from the case where one tape cassette is installed. When the tape cassette 1 is not installed, the actuator 213 does not rotate and remains at the position shown by the solid line. Therefore, although the sub-slide plate A164 is moved in the opposite direction to the main slide plate 130 by the relay gear 158, the sub-slide plate B172 is fixed at the position shown in FIG. 45, and the main slide plate 130. The sub-slide plate A164 and the sub-slide plate B172 change from FIG. 36 to FIG. 38. Furthermore, since the sub-slide plate B172 does not move, the select lever 166 also remains rotated counterclockwise, and the mode lock plate 159 does not change from the state before loading in FIG. 33. Therefore, when the main slide plate 130 is moved toward 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 130
The amount of movement of the loading chassis 64 = the amount of movement of the loading chassis 64. The result will be as shown in Figure 34. Sub slide plate B
172 is fixed to the drive chassis 63, but since the loading chassis 64 has more movement than when one tape cassette is installed, the sub-slide plate B at the end of loading
The relative positional relationship between the drum drive gear A 172 and the drum drive gear A 165 is the same as shown in FIG. 38 when the tape cassette 1 is not installed and FIG. 39 when the tape cassette 1 is installed. This means that the loading ring 223 . It can be said that the rotation angle of the loading gear 224 also remains unchanged. Therefore, the main boat is 225. The operation of the sub-boat 228 is completely the same as when the tape cassette 1 is attached. However, since the position of the sub-slide plate B172 does not change, the position of the 83-boat holder 203 with respect to the drive chassis 63 does not change from before loading. The S3 port 206 is guided by an S3 port guide 235 provided on the loading shear 764 and approaches the guide drum 60. When the result loading is finished,
The tape path shown in FIG. 18 is obtained. T4 post 38. Pinch roller 30. The position of the T5 post 39 is shown in Figure 62 (1st
The position is the same as in the figure). S1 Bost 31. The tension post 32, erase head 58, 32 post 33 are also the same as in FIG. S3 Post) 34, TI Bost 35. Fixed post 55, T2 post 36°, T3 post 37. Inclined guide post 63. The guide drum 60 has a length rLJ shown in FIGS. 17 and 18 in comparison with FIG. 52.
only the position changes. There is no particular change in the unloading operation, and after the unloading is completed, everything is the same as when the tape cassette 1 is used.

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

(1) It is a tape bus that can achieve the smallest possible mechanism when using an 8 mm tape cassette.

(2) Since the guide drum is moved linearly, it is extremely easy to handle cases where a large amount of movement of the guide drum is required when the tape cassette is not installed and miniaturization is promoted as in the present invention. .

(3) T that guides the tape exiting the guide drum
Since the 1 post is integrally constructed with the guide drum, it is easy to ensure mutual positional accuracy.0(4) Since the main boat is rotatably supported with respect to the guide drum, as in the present invention, Even if the tape winding angle around the guide drum is large and the gap between the guide drum and the T1 post is small, enough space can be secured between the T1 post and the guide drum to insert the tape when the cassette is installed.

(6) During loading and unloading of the sub-boat and the main boat, the heights of the posts attached to both boats are almost the same, so there is little risk of damaging the tape. Furthermore, as the sub-boat spring is charged and the main boat and sub-port move apart, the sub-boat gradually rises to the required height, so care has been taken to avoid applying excessive force to the tape.

(6) Since the loading ring is configured at an angle with respect to the chassis, each post on the main boat
Although it is at the lowest position at the loading end, it is possible to set the height to almost the same as the tape height in the cassette before loading, and as a result, it is possible to adopt a system that rotates integrally with the guide drum. Ta.

[Brief explanation of the drawing]

Fig. 1 is a tape bus diagram when the tape cassette of the present invention is installed, Fig. 2 is a top perspective view of the tape cassette of an 8 mm VTR,
Fig. 3 is a perspective view of the back of the tape cassette, Fig. 4 is a plan view of the tape cassette, Fig. 5 is a side view of the tape cassette, Fig. 6 is a sectional view taken along line A-A of Fig. 4, and Figs. Figure 4B-
B sectional view, FIG. 9 is a partial sectional view of the cassette lid lock, FIG. 10 is a side view of the cassette lid, FIG. 11 is a perspective view of an embodiment of the lid release, and FIG. 12 is the lid opening/closing operation. A perspective view of one embodiment, FIG. 13 is a VH8 standard tape path diagram, FIG. 14 is a VH3 tape path diagram of a VHS video movie with 4-head sequential switching system, and FIG. 15 is a VH8 standard tape path diagram.
Tape pattern diagrams of the standard guide drum for S-video and the small guide drum for VHS video movies, Figure 16 is a diagram of the movement trajectory of the guide drum in Figure 17 of an 8mm VTR, and Figure 18 is the main loading process when no tape cassette is installed. Figure 19 is a perspective view of the main body of the VTR device,
FIG. 20 is a plan view of a specific embodiment of the present invention, FIG. 21 is a perspective view of the chassis structure, FIG. 22 is a side view of the cassette holder, FIG. 23 is a side view of the cassette holder in a cassette setup state, and FIG. Figure 24 is a side view of the cassette holder in the cassette down state, Figure 25 is a plan view of the cassette holder, Figure 26 is a partial front view of the cassette holder, and Figure 27 is a side view of the cassette holder in the cassette down state.
The figure is a sectional view taken along the line P-P in FIG. 25, FIG. 28 is a perspective view of the cassette holder lid release mechanism, FIG. 29 is an exploded perspective view of the tape loading drive mechanism, and FIG. 30 is the same as in FIG. Figure 31 is a side view of the tape loading drive and drive mechanism in the cassette setup state, Figure 32 is a side view of the tape loading drive mechanism in the cassette down state, and Figure 33 is the loading chassis movement before tape loading. A side view of the mechanism, FIG. 34 is a side view of the tape carding chassis moving mechanism, FIG. 36 is a side view of the loading chassis moving mechanism after tape loading when a tape cassette is attached, and FIG. 36 is a loading before tape loading.・/A plan view of the palm moving mechanism, FIG. 37 is a front view of the loading chassis moving mechanism, FIG. 38 is a plan view of the loading chassis moving mechanism after tape loading without a tape cassette installed, and FIG. 39 is a tape cassette installed. Top view of the loading chassis movement mechanism after tape loading in case of
FIG. 40 is a plan view of the supply reel drive mechanism, FIG. 41 is a sectional view of the supply reel drive mechanism, and FIG. 42 is a plan view of the tape guide member on the supply reel side (after loading when no tape cassette is installed). Fig. 43 is a side sectional view of the tape guide member on the supply reel side, Fig. 44 is a main exploded perspective view of the loading chassis moving mechanism, Fig. 45 is a plan view of the cassette detection mechanism, and Fig. 46 is a side view of the cassette detection mechanism. ,
FIG. 47 is a plan view of the cassette detection mechanism door member when the tape cassette is attached, FIG. 49 is a front view of the tape guide member before loading, FIG. 50 is a plan view of the upper part of the loading chassis after loading, and FIG. The figure is a front view of the tape guide member after loading, Figure 62 is a plan view of the tape guide member after loading the tape when the tape cassette is attached, and Figure 53 is halfway through tape loading when it comes into contact with the sub-boat or sub-boat stopper. Fig. 54 is a view taken in the direction of the X arrow in Fig. 53, Fig. 66 is an exploded perspective view of the main parts of tape loading, Fig. 56 is a plan view of the conventional loading device before loading, Fig. 57 is the conventional FIG. 3 is a plan view of the loading device after loading. 1...Tape cassette, 34...S3
Bost, 35...T1 post, 36...-
・T2 Bost, 3A...T3 Bost, 38...
...T4 Bost, 53. River... Slanted Guide Post,
66... Fixed post, 69... Capstan, 6o... Guide drum, 63... Body, 96... Main gear, 97...・・Unload gear A198 ・・・Unload gear B199
...Load gear, 130...-Main slide plate, 158...Relay gear, 164...
...Sub slide plate A, 172...Sub slide plate B, 223...Loading ring, 2
24...Loading gear, 225...
・Main boat, 228...Sub port. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4 Figure 5! Tabuka set Figure 8 Figure 9! Fig. 10 Fig. 12 Fig. 13 /1// Kant F" Ram Fig. 14 Fig. 124 Saari reel f?, 5 Te A7
A.9 No. Reno V Fig. 15 Fig. 16 Fig. 17 Fig. 18 Fig. 19 Fig. 24 Fig. 17v Oboro Fig. 25 Fig. 1E27 Fig.
91h le 9'', small I reference 2 reno 1 part - Fig. 30 Fig. 31■ Fig. 36 Fig. 137 cause ゛゛hL child A 3rd &ta /, 30 Meishisurai F call ζ 1R39 Fig. 40/12 Figure 142Figure 43Figure 144Figure 45Figure 46Figure 47TemplateFigure 53Me7'7Small-TokuiVToolm1E54Figure 55Figure 56

Claims (5)

[Claims] (1) A tape loading device in which the position of the guide drum is relatively close to and distant from the reel axis, and the tape being stretched on the front side of the tape cassette is sandwiched between the guide drum and the guide drum, and the guide drum is placed in the front side from a first position facing the reel axis. a guide drum transport means for linearly transporting the guide drum to a second position beyond the tape stretching position; and a guide drum transporting means for linearly transporting the guide drum to a second position beyond the tape stretching position; A tape loading device comprising a guide drum rotating means. (2) Rotation of a guide drum integrated with a post unit equipped with the tape drawer post so that the tape drawer post guides the tape stretched on the front surface of the tape cassette downward from the height of the tape. The tape loading device according to claim 1, wherein the central axis is inclined at a predetermined angle with respect to the reel axis. (3) Claim 1, wherein the post unit comprises a first post unit supported by a guide drum so as to be rotatable at a predetermined angle, and a second post unit slidably held by the guide drum. Tape loading device as described. (4) The first post unit is moved with an elastic member in a direction in which the first drawer post, which is provided on the first post unit and directly receives and guides the tape sent out from the guide drum, is separated from the guide drum. The tape loading device according to claim 3, wherein the tape loading device is energized. (5) The second post unit is held by the guide drum so as to be close to and away from the first post unit, and the second post unit is relative to the guide drum when the second post unit approaches the first post unit. The height is the first
2. The tape loading device according to claim 1, wherein the tape loading device is configured to be lower than when separated from the post.