JP3153916B2 - Tape player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel tape player. Specifically, a tape cassette provided with a rotatable lid that is moved between a closed position that covers the tape passing through the tape drawing surface and an upper open position thereby is used, and the tape cassette is mounted. A head drum is disposed near the cassette mounting portion, and at least at the final stage of mounting the tape cassette in the cassette mounting portion, the tape cassette is moved in a direction substantially parallel to the axis of the head drum, and during the movement, the tape cassette is moved. This relates to a tape player in which the lid of the cassette is moved to the open position, and the tape rides on the head drum caused by the movement of the lid to the open position with the tape stuck to the lid due to static electricity. A new tape play that can be prevented and can be performed without using special means It is intended to provide a ya.

[0002]

2. Description of the Related Art A video tape player (VTR) and a rotary head digital audio tape player (R-D
A tape cassette used for a tape player such as an AT) is usually provided with a lid for protecting a tape led out of the cassette case when not in use.

A tape cassette a shown in FIGS. 9 and 10 is a tape cassette for a VTR.
Is a thin box-shaped cassette case b and a magnetic tape c
Are wound around a cassette case b and are rotatably housed in a cassette case b. Two tape reels d and d for the S side and a T side, and a rotatable lid f for opening and closing a tape drawing surface e which is one side surface of the cassette case b. The magnetic tape c at the portion between the tape reels d and d is drawn out of the cassette case b from the tape outlets g formed at both ends of the tape drawing surface e and passes through the tape drawing surface e. Is done.

[0004] Reference numeral h denotes a tape pull-out recess located behind the magnetic tape c passing through the tape pull-out surface e.

[0005] The lid f has a closed position for covering the magnetic tape c passing through the tape drawing-out surface e from the front as shown by a two-dot chain line in Fig. 10 and a tape drawing-out surface e as shown by a solid line in the same figure. The tape cassette a is rotatably supported by the cassette case b so as to move between the open position and the open position, and is moved to the open position when the tape cassette a is mounted on the VTRi.
In other cases, the magnetic tape c is held in the closed position by a lock means (not shown), thereby protecting the magnetic tape c.

[0006] Recording and reading of signals by this type of tape player is usually performed by a helical scan method in which a rotary magnetic head scans a recording surface of a magnetic tape in a direction inclined with respect to the running direction. The recording / reproducing unit is provided with a head drum provided with a rotating magnetic head that moves along a rotation locus, and at least when performing recording or reproduction, pulls out a magnetic tape from a tape cassette mounted on the cassette mounting unit. A part of the tape is wound around the outer peripheral surface of the head drum by a predetermined winding angle, and the rotating magnetic head is rotated while the tape loading is completed, and the magnetic tape is run.

Therefore, in such a tape player, the head drum is disposed near the cassette mounting portion due to the above-described tape loading, and the mounting of the tape cassette to the cassette mounting portion is performed by using the tape drawing surface. Is moved in a direction facing the head drum, and at least in a final stage thereof, in a direction substantially parallel to the axis of the head drum.

That is, in the figure, j is a mechanical chassis of the VTRi, k is a head drum supported by the mechanical chassis j, l, m and l ', m' are moving tape guides for tape loading; Cassette a is VTRi
, The moving tape guides l, m and l ', m
Is relatively positioned in the tape pull-out recess h of the cassette case b, and the lid f moves to the open position at least before the tape loading starts.

When the tape loading starts, the moving tape guides l, m and l ', m' are shown in FIG.
The magnetic tape c is moved to the loading completion position indicated by the dashed line, whereby the magnetic tape c is pulled out of the cassette case b by a predetermined amount, and a part of the magnetic tape c is wound around the outer peripheral surface of the head drum k.

Incidentally, the cassette case b and the lid f
Are generally formed of a synthetic resin, and if the lid f or the magnetic tape c is charged with static electricity, the magnetic tape c sticks to the lid f. When the lid f moves to the open position from that state, the tape withdrawal surface e
As a result, the magnetic tape c is pulled upward together with the lid f, and as a result, the magnetic tape c is indicated by the dashed line in FIG. 10 and the upper surface of the head drum k as indicated by the thin dashed line in FIG. May get on.

From such a state, the moving tape guide l,
When m and l ', m' move toward the loading completion position, in many cases, the magnetic tape c is moved backward over the head drum k, and the magnetic tape c is moved as shown by a thick dashed line in FIG. It is positioned so as to surround the drum k from behind.

In such a case, not only recording and reproduction cannot be performed, but also the magnetic tape c cannot be wound into the cassette case b, so that the tape cassette a cannot be taken out. Or the magnetic tape c may be removed, but the magnetic tape c may be jammed, or the magnetic tape c may be torn, such as a fatal damage to the magnetic tape c, or an accident to the tape player. I will.

In order to prevent the magnetic tape c from getting on the head drum k, which causes such an accident, some means have conventionally been proposed.

FIGS. 11 to 14 show other examples of such means.

In FIG. 11, n is a slide-off piece attached to an end of the upper drum v (fixed drum) of the head drum k on the cassette mounting portion side, and is a synthetic resin piece having flexibility. And has a guide portion o inclined so as to be displaced toward the cassette mounting portion side as going downward.
When the magnetic tape c is pulled along with the movement of the lid f to the open position, the magnetic tape c is moved to the tape cassette a.
Is guided by the guide portion o with the downward movement of the head drum k, and is dropped before the head drum k.

In FIG. 13, p is a scrap off piece attached to the outer peripheral portion of the upper end surface of the upper drum w (rotary drum) of the head drum k, and the tape cassette a is mounted on the cassette mounting portion. At times, the upper drum w is temporarily rotated so that the magnetic tape c riding on the upper surface of the upper drum w is wiped off.

Further, in FIG. 14, q is a cassette carrier into which a tape cassette a is removably mounted.
It is moved between an eject position indicated by a solid line and a cassette mounting position indicated by a two-dot chain line.

R is a scraper whose one end is rotatably supported at substantially the center of the upper part of the cassette carrier q, and s is a substantially inverted L
The lower end is a rotating lever rotatably supported on one side of the cassette carrier q, and the swab r and the rotating lever s are interlocked with each other via a wire t. The rotation lever s is urged to rotate counterclockwise by a tension spring u bridged between the rotation lever s and the cassette carrier q, and rotates in the same direction by a stopper (not shown). Thus, when the cassette carrier q is at the eject position, the wiper r is held in a posture extending straight.

Then, when the cassette carrier q is moved downward from the eject position and the rotating end of the wiper r reaches near the upper end surface of the head drum k as shown by the dashed line, the rotating lever s Is rotated clockwise by being pressed by a pressing member (not shown), and accordingly, the wiper r is also rotated clockwise. As a result, the magnetic tape c running on the head drum k is removed by the scrap r.

[0020]

However, each of the above means has several problems.

Since the slide-off piece n shown in FIG. 11 needs a certain height, a space for arranging the slide-down piece n above the head drum k is required. Furthermore, there is a problem that the inclination of the guide portion o and the position of the leading end are slightly varied, so that the magnetic tape c is not surely slipped off.

The head drum k is a tape cassette a
12, when the tape cassette a is in the mounting position, the guide portion o remains bent as shown in FIG. 12, and the tape cassette a remains bent in a high-temperature environment. There is a problem in that a song is attached, and thereafter, the function as a guide unit is not fulfilled.

The sweeping member p shown in FIG. 13 moves along the longitudinal direction of the magnetic tape c riding on the head drum k. There is no guarantee that this will be done reliably.

FIG. 14 has a problem that it requires a large number of parts and is costly. In addition, in order to prevent the magnetic tape c from being damaged, the wiping piece r is made of synthetic resin. Therefore, there is a problem that it is difficult to obtain dimensional accuracy, and it is easy to be deformed by the environmental temperature, so that the wiping is not reliable.

[0025]

In order to solve the above-mentioned problems, a tape player according to the present invention is designed to measure the distance between the tip of the lid and the head drum in a state where the tape cassette is completely mounted, by measuring the tape width. From 1.2 times to approximately 1.
The distance between the tip of the lid and the upper surface of the head drum in the thickness direction of the tape cassette is 3 times the tape width.
That is, it is reduced from two-fourths to approximately three-quarters .

[0026]

Therefore, in the tape player of the present invention, when the tape cassette is completely mounted, the tape width between the leading end of the lid of the tape cassette and the head drum is reduced.
Since there is a distance of 1.2 times to about 1.4 times , even if the tape that has been passed through the tape drawing surface is dragged by the lid that moves to the open position, the tape may not move between the lid and the head drum. There is almost no possibility of being bridged between,
Moreover, in the thickness direction of the tape cassette , two-thirds of the tape width is provided between the tip of the lid and the upper surface of the head drum.
Is approximately three-quarters of the distance from the tape draw-out surface and the top surface of the head drum, so that even if the tape gets on the head drum, the tape will still remain on the tape draw-out surface of the tape cassette. Since the tape is positioned almost in front, the tape wound on the head drum can be reliably wound into the cassette case by executing the tape winding by the tape reel after the cassette is mounted.

In the present invention, no special member is required to prevent the tape from running on the head drum, so that the cost is not increased, and the positional relationship between the head drum and the cassette mounting portion is determined by a predetermined value. Since it is only necessary to specify the dimensions, there is no influence from variations in parts, environmental changes, and changes over time, so that extremely high reliability can be obtained. Also as above
At the end of the lid when the tape cassette is
Is the distance between the end and the head drum 1.2 times the tape width?
About 1.4 times, the top of the lid and the top of the head drum
The distance in the thickness direction of the tape cassette between
In the case of 2/3 to about 3/4 of the tape width, tape
There is almost no need to worry about upsizing of the player.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the tape player of the present invention will be described below with reference to the embodiments shown in the accompanying drawings.

The embodiments shown in the drawings illustrate the present invention.
The outer shape and dimensions conform to the 8mm video standard, and
The present invention is applied to a video tape recorder (hereinafter, referred to as "VTR") using a tape cassette having two lids for protecting a tape.

FIGS. 1 to 6 show a first embodiment 1 of a VTR to which the present invention is applied.

Before describing the VTR 1, the tape cassette 2 used for the VTR 1 will be described (see FIGS. 2 to 6).

Reference numeral 3 denotes a cassette case of the tape cassette 2, which is a relatively thin box having a rectangular shape when viewed from the thickness direction by integrally connecting the upper and lower two case halves 4 and 4 '. The one side surface 5 in the width direction is a tape drawing surface. Tape outlets 6 are formed at both left and right ends of the tape pull-out surface 5, and tape guide portions are integrally formed with the peripheral wall 7 of the cassette case 3 at front end portions of inner surfaces of the tape outlets 6 near each other. 8, 8 are formed, and a tape draw-out recess 9 opened upward, downward, and forward is formed in a portion between the tape outlets 6.

In the cassette case 3, a pair of tape reels 11 and 12 around which the magnetic tape 10 is wound, that is, a supply-side tape reel 11 (hereinafter, referred to as an "S-reel") and a take-up-side tape reel 12 are provided. (Hereinafter, referred to as “T reel”) is rotatably stored. These tape reels 11 and 12 have cylindrical hubs 13 and 13 that are short in the axial direction for their diameter, that is, tape winding portions 13 and 13,
A central portion comprises a pair of upper and lower flange plates 14, 14 and 14 ', 14' respectively connected to upper and lower ends of the hubs 13, 13, respectively. 13a, 13a are formed. And
The lower ends of the hubs 13, 13 are connected to lower flange plates 14 ', 1
4 ', the tape reels 11, 12 protrude downward from the bottom of the cassette case 3 and are provided in the bottom holes 15a, 15a of the cassette case 3 with a margin. 3 rotatably supported.

The magnetic tape 10 exits from the S reel 11 and is wound around one of the tape guides 8 and is led out of the cassette case 3, and is introduced into the cassette case 3 after being wound around the other tape guide 8. Thus, a part of the magnetic tape 10 is positioned so as to extend along the tape pull-out surface 5 while being stretched between the two tape guide portions 8.

Reference numeral 16 denotes a lid (hereinafter, referred to as a “front lid”) for opening and closing the tape pull-out surface 5, and a plate-like front portion 16 a having substantially the same size as the tape pull-out surface 5.
And a narrow upper surface portion 1 extending slightly upward from the upper edge to the rear.
6b, side portions 16c, 16c protruding rearward from both left and right ends of the front portion 16a, fulcrum shafts 16d, 16d protruding inward from positions slightly closer to the center than the center of the side portions 16c, 16c, The support arms 16e, 16e, which protrude downward from the positions near the left and right ends of the portion 16b, are integrally formed of synthetic resin.
d and 16d are rotatably supported by the front ends of the left and right sides of the peripheral wall 7 of the cassette case 3.

As shown in FIG. 4, the front lid 16 has a closed position in which the front portion 16a covers the magnetic tape 10 located on the tape drawing-out surface 5 from the front, and FIG. As shown, approximately 90 ° from the closed position
The tape is moved upward and is moved between an open position where the tape drawing surface 5 is opened.

The front lid 16 is urged by a resilient means (not shown) toward the closing position, and when it comes to the closing position, is locked at that position by locking means (not shown). Tape cassette 2 is V
When it is mounted on TR1, it is moved to the open position, otherwise it is held in the closed position.

Reference numeral 17 denotes another lid (hereinafter referred to as "back lid"). The back lid 17 has a length in the left-right direction substantially equal to the length in the left-right direction of the tape pull-out recess 9, and has a main portion 17a having a width slightly longer than the thickness of the cassette case 3, and a narrow band plate. An upper surface portion 17b whose middle portion in the width direction is connected to the upper edge of the main portion 17a, small protrusions 17c, 17c protruding from substantially the middle of the left and right end surfaces of the main portion 17a, Projecting pieces 17d projecting rearward from both left and right ends of the lower end of the
17d and guided pins 17e, 17e protruding outward from the rear ends of the protruding pieces 17d, 17d are integrally formed of synthetic resin.

The back lid 17 is connected to the projection 17
c, 17c are supporting arms 16e, 16 of the front lid 16.
e is rotatably supported on the lower end of the front lid 16 to be connected to the front lid 16 and to be guided by pins 17e, 17e.
Is slidably engaged with the guide grooves 18 formed in the cassette case 3, thereby restricting the posture during the movement.

The guide grooves 18 are formed in the peripheral wall 7 of the cassette case 3 so as to extend substantially vertically in opposite surfaces of portions defining the left and right ends of the tape pull-out recess 9, and extend in the left-right direction. It is located on the front side of the pivot point of the front lid 16 as viewed from above.

Thus, when the front lid 16 is at the closed position, the back lid 17 is held at the closed position shown in FIG. 4, and in this state, the main portion 17a is tilted backward and the tape is pulled out. The upper surface portion 17b is located so as to cover the magnetic tape 10 passing through the surface 5 from behind.
Are positioned so as to fill the space between the upper surface 16b of the front lid 16 and the upper surface wall 19 of the cassette case 3.

When the front lid 16 moves to the open position, the back lid 17 moves to the open position shown in FIG. 5, and in this state, the main portion 17a assumes a substantially horizontal posture and the upper surface of the cassette case 3 It is positioned so as to protrude forward from a position slightly higher than the wall 19, and its tip is positioned slightly behind the tape pull-out surface 5 when viewed from above and below, and the upper surface 17b is positioned behind the upper surface 16b of the front lid 16. I do.

When the front lid 16 and the back lid 17 are in the closed position, the magnetic tape 10 that has passed through the tape pull-out surface 5 is not used.
Since the magnetic tape 10 is located in the space closed by the back lid 6 and the back lid 17, it is possible to prevent the magnetic tape 10 from being touched by hands or to adhere to dust. Closed.

When the front lid 16 and the back lid 17 have moved to the open positions, the tape pull-out surface 5 is opened.

Reference numerals 20, 20,... Denote positioning holes respectively formed at positions close to the left and right ends of the rear end of the bottom plate 15 of the cassette case 3 and the left and right ends of the tape drawing recess 9.

Next, the VTR 1 will be described.

A mechanical chassis 21 of the VTR 1 has a front half (the direction toward the lower right in FIG. 1 is the front side, and the direction toward the upper left is the rear side).
In addition, the direction going to the lower left in the figure is the left side, and the direction going to the upper right is the right side. In the following description, the direction is indicated by this direction. ) Is a cassette mounting portion in which the tape cassette 2 is removably mounted. That is, four cassette positioning pins 23, 23,... On which the cassette case 3 is mounted are erected on the upper surface of the front half of the mechanical chassis 21, and the two reel bases 2 are separated in the left-right direction.
4, 25, that is, the S-side reel base 24 to which the S reel 11 is engaged and the T-side reel base 25 to which the T reel 12 is engaged are rotatably arranged. These reel stands 24, 25
Is composed of gear parts 24a and 25a coaxially located, reel mounting parts 24b and 25b, reel engaging shafts 24c and 25c, and the like.

Reference numeral 26 denotes a cassette carrier for holding the tape cassette 2 and mounting the tape cassette 2 on the cassette mounting portion 22. The frame has substantially the same size as the outer shape of the cassette case 3 viewed from the width direction when viewed from the front and rear directions. The cassette holding portion 27 has two long arms 28, 28 extending rearward from both left and right ends thereof, and two holes 29a, 29a spaced apart in the left and right direction are formed in the bottom plate 29 of the cassette holding portion 27.
And stoppers 29b, 29b protruding upward from a position separated to the left and right of the rear side edge.

Reference numerals 30, 30 denote support pieces fixed to the left and right ends of the upper surface of the rear end of the mechanical chassis 21, and the rear ends of the arms 28, 28 of the cassette carrier 26
The cassette carrier 26 is supported on the cassette carrier 26 at a position slightly higher than the mechanical chassis 21 with the cassette holding portion 27 in a horizontal posture as shown in FIG. 4, and the cassette holding portion 27 moves backward and downward as shown in FIG. 4, and moves to an eject position which is located considerably above the cassette mounting position.

The loading and unloading of the tape cassette 2 to and from the cassette carrier 26 is performed in a state where the cassette carrier 26 is at the eject position, and the loading is performed at the left and right ends of the front end face of the bottom plate 15 of the peripheral wall 7 of the cassette case 3. The process is completed when the stoppers 29b come into contact with the distal ends of the stoppers 29b.

When the cassette carrier 26 is moved to the cassette mounting position from the state where the tape cassette 2 is loaded, the positioning holes 20 and 2 of the cassette case 3 are moved.
0, ..., cassette positioning pins 23, 23, ...
Are inserted and the opening edges of the positioning holes 20, 20,... Are placed on the shoulders of the positioning pins 23, 23,. ,
As a result, the tape cassette 2 is mounted on the cassette mounting portion 22 with the tape cassette 2 positioned.

When the tape cassette 2 is mounted in the cassette mounting section 22 in this manner, the reel tables 24, 2
5 above the reel mounting portions 24b, 25b are holes 29a, 29 formed in the bottom plate 29 of the cassette carrier 26.
a, and is projected upward through the reel mounting portion 24b,
The reel hub 1 of the tape reels 11 and 12 is provided on 25b.
The lower end of each of the reel engagement shafts 3 and 13 is placed on the reel engagement shaft 24.
c, 25c are reel base engaging holes 13a of the hubs 13, 13.
13a, whereby the S reel 11 and the T reel 12 are coupled to rotate integrally with the S reel base 25 and the T reel base 25, respectively.

Reference numeral 31 denotes a rising piece projecting upward from a substantially middle portion of the left side edge of the mechanical chassis 21 in the front-rear direction, and a lid-raising pin 32 is protruded rightward from the upper end thereof. .

When the tape cassette 2 is loaded into the cassette carrier 26, the position of the left side surface 16c of the front lid 16 closer to the front surface 16a than the fulcrum shaft 16d is above the front end of the lid raising pin 32. Located in. Therefore, when the cassette carrier 26 moves downward from this state, the side surface portion 16c is relatively pressed substantially upward by the lid raising pin 32, so that the front lid 16 and the back lid 17 are moved to the open position. .

The lock applied to the front lid 16 is released by a lock release means (not shown) provided in the cassette holder 27 when the tape cassette 2 is loaded in the cassette holder 27.

Reference numeral 33 denotes a head drum. The head drum 33 includes a fixed drum 33a fixed to a drum support seat 34 disposed below the mechanical chassis 21, a rotating drum 33b rotatably supported by the fixed drum 33a,
It comprises a plurality of rotating magnetic heads (not shown) supported by the rotating drum 33b while being positioned between the fixed drum 33a and the rotating drum 33b. When recording or reproduction on the magnetic tape 10 is performed, the rotating drum 33b or the like is used. Are rotated at a high speed integrally by a drum motor (not shown), and the rotating magnetic head is
It moves along the outer peripheral surface of.

The axis of the head drum 33 is inclined to the left front to some extent.

The positional relationship between the head drum 33 and the back lid 17 of the tape cassette 2 mounted on the cassette mounting section 22 is defined as follows.

That is, when the tape cassette 2 is mounted on the cassette mounting section 22, the front end of the back lid 17 of the tape cassette 2 and the upper end face of the head drum 33 are connected to the cassette mounting section 22.
Is approximately 1.4 times the width of the magnetic tape 10, and the distance L2 between the two in the thickness direction of the tape cassette 2 is
It is approximately three quarters of the width of zero.

As described above, the distance L1 is substantially equal to the tape width.
1.4 times, and the distance L2 was set to approximately 3/4 of the tape width.
What's the best thing about this distance?
Prevents the tape from running on the head drum
And the tape player is still larger.
This is because it can be kept within the range that can be proud.

When the front lid 16 and the back lid 17 move to the open position, the magnetic tape 10 passing through the tape pull-out surface 5 is pulled by the lids 16 and 17 due to the electrostatic attraction. Even if it goes to a position higher than the upper surface of the head drum 33,
Since the distance between the tip of the back lid 17 and the head drum 33 is larger than the width of the magnetic tape 10, the magnetic tape 10 cannot be bridged between the back lid 17 and the head drum 33. Also, lid 1
Even if the magnetic tape 10 is pulled backward after being dragged by the heads 6 and 17, the magnetic tape 10 falls before the head drum 33 unless the magnetic tape 10 has an excessively large slack.
There is no possibility of getting on the upper surface of the head drum 33.

Also, assuming that the magnetic tape 10 being passed through the tape pull-out surface 5 has been pulled as described above, the tape is wound by a tape reel after the tape cassette 2 has been mounted. . This winding is performed, for example, by rotating the S-side reel base 24 in the tape winding direction with the brake applied to the T-side reel base 25. That is, when it is detected that the mounting of the tape cassette 2 is completed, the brake means (not shown) for the T-side reel base 25 is driven to apply a brake to the T-side reel base 25, and then the reel base drive means S side reel stand 24
Is rotated counterclockwise as viewed from above.

Accordingly, when the magnetic tape 10 is
In the case where the magnetic tape 10 is pulled upward and loosened, the loosened magnetic tape 10 is wound around the S reel 11 so that the slack is eliminated.

When such winding is performed, the distance L2 is an extremely effective factor. That is, since this winding operation is an operation for returning the magnetic tape 10 pulled by the lids 16 and 17 onto the tape drawing surface 5, the distance L2 is small and the tape drawing surface 5 and the head drum 33 are separated. If there is no step between them, there is a high possibility that the magnetic tape 10 is caught on the upper surface of the head drum 33 or the back lid 17 and cannot be returned to the tape drawing surface 5 smoothly.

The magnetic tape 10 may be wound by rotating the T-side reel stand 25.
In this case, the brake may be applied to the S-side reel base 24.

Reference numeral 35 denotes a capstan provided so as to protrude upward from a position on the right side of the head drum 33 in the mechanical chassis 21, and has a lower end provided with a flywheel 36 positioned below the mechanical chassis 21. (See FIG. 2).

Numerals 37 and 37 'denote tape loading blocks for carrying out tape loading. The tapes include moving bases 38, 38 and roller guides 39, 39 and moving inclination guides 40, 40 supported by the moving bases 38, 38. The moving bases 38, 38 are provided with the mechanical chassis 21.
The guide grooves 21a, 21a are supported so as to move along the guide grooves 21a, 21a, and the front ends of the guide grooves 21a, 21a correspond to the tape pull-out recesses 9 of the tape cassette 2 mounted on the cassette mounting portion 22. , And the rear ends of the head drum 33 extend to the left and right sides of the rear end of the head drum 33, respectively.

Reference numeral 41 denotes a fixed tape guide disposed at a position substantially opposite to the capstan 35 across the head drum 33 in the mechanical chassis 21, reference numeral 42 denotes a pinch roller, reference numeral 43 denotes a flexible guide, and reference numeral 44 denotes a ten leg pin. Roller 42, Flexure Guide 43, Tenregi Pin 4
Numeral 4 is supported by the rotating ends of three arms (not shown) whose one end is rotatably supported by the mechanical chassis 21.

In the state before the tape loading is started, the tape loading block 3
7, 37 'are at the front ends of the guide grooves 21a, 21a, and the pinch roller 42 is at the right side of the tape loading block 37.
, The feeder guide 43 is at a position substantially to the right of the pinch roller 42, the ten leg pin 44 is waiting behind the left tape loading block 37, and the tape cassette 2 is in the cassette mounting section. 22
The roller guides 39, 39, the moving inclination guides 40, 40, the pinch roller 42, the flexible guide 43, and the tension pin 44 are all located in the tape pull-out recess 9 of the cassette case 3.

When the tape loading is started, the tape loading blocks 37 and 37 ', the pinch roller 42, the flexible guide 43, and the ten pin 44 are moved to the positions shown by two-dot chain lines in FIG. 3, that is, the tape loading blocks 37 and 37' To the rear ends of the guide grooves 21a, 21a, the pinch roller 42 is moved to the position where it is pressed against the capstan 35, the fly guide 43 is moved to a position slightly before the tape outlet 6 on the right side of the tape cassette 2, and the ten leg pin 44 is moved to the It moves to a position slightly ahead of the tape outlet 6 on the left side of the cassette 2.

As a result, a predetermined amount of the magnetic tape 10 is pulled out from the cassette case 3, passed through a predetermined tape path, and a part thereof is wound around the outer peripheral surface of the head drum 33.

The tape loading is performed in this manner.

FIGS. 7 and 8 show the tape player of the present invention
This shows a second embodiment 45 applied to a TR.

The difference between the VTR 45 shown in the second embodiment and the VTR 1 shown in the first embodiment is mainly that the cassette mounting portion and the head drum are relatively slidable. The two drums are separately supported, and the head drum is positioned in the cassette case of the tape cassette when performing recording and reproduction. Therefore,
In the drawings, only the main parts are shown, and the description is made only for the above differences, and the remaining portions are the same as those in the first embodiment with the same reference numerals as in the first embodiment. The description will be omitted by appending “.

Reference numeral 46 denotes a fixed chassis on which the head drum 33 is supported on its upper surface, and guide walls 47, 47 (only one is shown in the drawing) rising from both left and right edges thereof and an upper surface of its front end. Guide pillars 48, 48 (only one of which is shown) are provided upright at both left and right ends, and the guide walls 47, 47 have guided grooves 4 extending in the front-rear direction.
7a and 47a are formed.

Reference numeral 49 denotes a slide chassis provided with a cassette mounting portion 22 on the upper surface thereof, and engagement grooves 50, 50 (only one is shown in the drawing) extending in the front-rear direction are formed at both left and right ends. Also, leg pieces 51, 51 (only one is shown in the drawing) are suspended from the rear ends of the left and right side edges, and guided shafts 52, 52 are horizontally mounted on the leg pieces 51, 51. It is projected.

The guided shafts 52, 52 are slidable in guide grooves 47a, 47a formed in the fixed chassis 46, and upper end portions of the guide columns 48, 48 erected on the fixed chassis 46. Are slidably engaged with the guided grooves 50, 50 of the slide chassis 49, whereby the slide chassis 49 is slightly higher than the fixed chassis 46 and is slidably movable in the front-rear direction with the fixed chassis 46. Supported.

Incidentally, such a slide chassis 46 is
As shown in FIG. 7, between the drawn-out position where the rear end faces the front end of the fixed chassis 46, and the drawn-in position where the substantially rear half thereof faces the front half of the fixed chassis 46 as shown in FIG. Will be moved.

Reference numeral 53 denotes a cassette carrier into which the tape cassette 2 is removably mounted. The cassette carrier 53 can be moved vertically in the slide chassis 49 via a pantograph-like support mechanism 54, that is, the cassette mounting shown by a solid line in FIG. The cassette carrier 53 is supported so as to move between the tape cassette 2 and an eject position indicated by a two-dot chain line in FIG. 2, the front lid 16 and the back lid 17 of the tape cassette 2 are moved to the open position.

Also in this embodiment, the distance L1 between the tip of the back lid 17 of the tape cassette 2 mounted on the cassette mounting section 22 and the head drum 33 is 1.2 times the width of the magnetic tape 10. The distance L2 between the tip of the back lid 17 and the head drum 33 in the thickness direction of the tape cassette 2 is at least two thirds of the width of the magnetic tape 10.

When it is detected that the cassette carrier 53 has reached the cassette mounting position, first, the tape is wound, and then the slide chassis 49 is moved to the retracted position.

With this movement, the front end of the head drum 33 is positioned in a relatively large notch (not shown) formed in the slide chassis 49 and the tape pull-out recess 9 of the cassette case 3 (see FIG. 8). Tape loading starts.

In this VTR 45, the front end of the head drum 33 is located in the cassette case 3 when the tape cassette 2 and the head drum 33 are present at a relatively large distance when the tape cassette 2 is mounted. The distance L1 does not cause an increase in the shape of the VTR 45.

[0084]

As is apparent from the above description, the tape player according to the present invention can be moved between the closed position covering the tape passing through the tape drawing surface and the open position above it. A tape cassette provided with a movable lid is used, and a head drum is arranged near a cassette mounting portion where the tape cassette is mounted, and the tape cassette is headed at least at the final stage of mounting the tape cassette on the cassette mounting portion. A tape player which is moved in a direction substantially parallel to the axis of a drum, and in which a lid of a tape cassette is moved to an open position during the movement, wherein a tip of the lid and a head in a state where the mounting of the tape cassette is completed. Is the distance from the drum 1.2 times the tape width?
And 1.4 times approximately et al., Tape the distance in the thickness direction of the tape cassette between the upper surface of the tip and the head drum of the lid
It is characterized in that the width is set from two-thirds to approximately three-fourths .

[0085] Therefore, in the present invention a tape player, the tape between the tip and the head drum of the lid of the tape cassette in the state where the mounting of the tape cassette is completed
Since there is a distance of 1.2 times to 1.4 times the width, even if the tape that has been passed through the tape drawing surface is dragged by the lid that moves to the open position, the tape remains in contact with the lid and the head. There is almost no possibility that the tape will be hung over the drum, and in the thickness direction of the tape cassette, the distance between the tip of the lid and the upper surface of the head drum is 3 minutes of the tape width.
Since there is a distance of approximately 3/4 from 2 above , there is a step between the tape draw-out surface and the top surface of the head drum, so even if the tape gets on the head drum, the tape can be pulled out of the tape cassette. Since the tape is positioned almost in front of the surface, the tape wound on the head drum can be reliably wound into the cassette case by executing the tape winding by the tape reel after the cassette is mounted.

In the present invention, no special member is required to prevent the tape from getting on the head drum, so that the cost is not increased, and the positional relationship between the head drum and the cassette mounting portion is determined. Since it is only necessary to define the dimensions, there is no influence from variations in parts, environmental changes, and changes over time, and therefore, extremely high reliability can be obtained. Also, as mentioned above,
Of the lid when the tape cassette is
Distance from the pad drum to approximately 1.2 times the tape width
1.4 times, between the top of the lid and the top of the head drum.
The distance in the thickness direction of the tape cassette between the tape width
In the case of 2/3 to about 3/4 of the tape
There is almost no need to worry about the size of the layer.

In the second embodiment, the cassette mounting portion and the head drum are separately provided on two relatively slidable chassis, and one chassis after the tape cassette is mounted on the cassette mounting portion. By moving the head drum, a part of the head drum is located in the cassette case, but by doing so, the distance between the lid and the head drum when the cassette is mounted is substantially what. Space loss.

Further, in the above embodiment, the present invention is applied to the one using a tape cassette provided with two lids for protecting the tape. However, the tape player to which the present invention can be applied is applied to the one using such a tape cassette. There is no limit.

In addition, the structure or shape of each part shown in each of the above embodiments, in particular, means for mounting the tape cassette in the cassette mounting part, means for moving the lid of the tape cassette, and the type of tape player, etc. Is merely an example of an embodiment for carrying out the present invention, and the technical scope of the present invention should not be limitedly interpreted by these.

[Brief description of the drawings]

FIG. 1 shows a first embodiment in which the tape player of the present invention is applied to an 8 mm VTR using a tape cassette with a back lid together with FIGS. 2 to 6, and FIG. 1 is a perspective view showing the entirety.

FIG. 2 is an overall plan view.

FIG. 3 is a plan view showing a state in which the tape cassette is mounted by cutting the tape cassette horizontally.

FIG. 4 is a side view showing a state where the cassette carrier is at an eject position by cutting the tape cassette.

FIG. 5 is a side view showing a state in which the cassette carrier has reached a cassette mounting position by cutting the tape cassette;

FIG. 6 is a perspective view showing an example of a tape cassette.

FIG. 7 shows a second embodiment of the tape player of the present invention together with FIG. 8, and is a side view showing a state where the slide chassis is at a pull-out position, with a part of the tape cassette being cut away. .

FIG. 8 is a side view showing a state where the slide chassis has been moved to the retracted position, with a part of the tape cassette cut away.

9 shows an example of a conventional VTR together with FIG. 10, and FIG. 9 is a plan view showing a tape cassette with a part cut away.

FIG. 10 is a side view of a main part.

FIG. 11 is a side view showing an example of a conventional tape rising prevention means.

FIG. 12 is a side view showing a problem of the means of FIG. 11;

FIG. 13 is a side view showing another example of the conventional tape rising prevention means.

FIG. 14 is a front view showing still another example of the conventional tape rising prevention means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tape player 2 Tape cassette 5 Tape drawing-out surface 10 Tape 16 Lid 17 Lid 22 Cassette mounting part 33 Head drum 45 Tape player

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hideji Yoshida 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (56) References JP-A-63-181153 (JP, A) (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 15 / 665,15 / 675

Claims (1)

(57) [Claims] 1. A tape cassette provided with a rotatable lid which is moved between a closed position covering a tape passing through a tape drawing surface and an open position above the tape cassette. The head drum is arranged near the cassette mounting portion to be mounted, and at least at the final stage of mounting the tape cassette on the cassette mounting portion, the tape cassette is moved in a direction substantially parallel to the axis of the head drum, and during the movement. A tape player in which a lid of a tape cassette is moved to an open position, wherein a distance between a leading end of the lid and a head drum in a state where the tape cassette is completely mounted is reduced from 1.2 times the tape width to about 1 .4 times and then <br/>, 2 the distance in the thickness direction of the tape cassette between the upper surface of the tip and the head drum of the lid of the third of the tape width
Characterized in that the tape player is approximately three quarters of the tape player.