JP2853852B2 - Tape player tape guide device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The tape guide device of the tape player of the present invention is described below.
Explanation will be given according to the items. A. Industrial application field B. Summary of the invention C. Prior art a. General background b. Example of conventional tape guide [Fig. 6] D. Problems to be solved by the invention [Fig. 7] E. Means for Solving Problems F. Embodiment a. Mechanical Chassis [FIGS. 1 and 2] b. Capstan and Reel Stand [FIGS. 2 and 3] c. Tape Cassette And loading the tape cassette into the player
Wear [FIGS. 2 and 3] d. Head base block [FIGS. 1 to 5] d-1. Head base [FIGS. 1, 2, 4 and 5]
Figure] d-2. Head holding member, main tape guide [Fig.
Fig. 5] d-3. Magnetic head [Figs. 1 to 5] d-4. Auxiliary tape guide [Figs. 1 to 5] d-5. Head holding member and head guide of tape guide member
D-6. Positional relationship between main tape guide and auxiliary tape guide
[FIG. 1, FIG. 3, FIG. 5] d-7. Movement to play position e. Pinch roller, reel stand, drive gear [FIG. 2, FIG.
Figure] f. Running of tape g. Reproduction operation [FIGS. 3 and 5] g-1. Regulation of contact position of magnetic tape with magnetic head g-1-a. Contact state of magnetic tape such as tape guide
[Fig. 3] g-1-b. Regulation by auxiliary tape guide [Fig. 3, Fig. 5
Figure] g-1-c. Regulation by main tape guide [FIG. 3, FIG.
Figure] g-2. Playback h. Playback level test G. Effect of the invention (A. Industrial application field) The present invention is a novel tape guide device for a tape player
About. For details, record or record signals on a magnetic tape.
Indicates that the playback of the recorded signal is almost
For magnetic heads with a core gap extending in the intersecting direction
When running while running with the magnetic tape in contact
In both cases, the contact position of the magnetic tape with respect to the magnetic head
The tape contact surface with which the recording surface of the tape contacts and the tape
A regulating piece that protrudes from the contact surface and contacts both sides of the tape
Tape player performed by tape guide means having
Tape guide device, for example, a so-called compact cassette
Audio tape using a tape cassette called
Related to the tape guide device of the player,
By improving the tape guide, the magnetic tape
It is impossible to regulate the contact position with the magnetic head on the magnetic tape.
New that can be performed with high accuracy without causing
To provide a tape guide device for a regular tape player
Is what you do. (B. Summary of the Invention) The tape guide device of the tape player of the present invention
Of the contact position of the tape with the magnetic head
The tape contact surface where the surfaces are in contact with and protruding from the tape contact surface
And a tape guard having a regulating piece with which both side edges of the tape come into contact.
Tape guide of tape player performed by guide means
In the device, both the magnetic heads in the tape running direction
A first tape guide means is provided on the side and the first tape guide means is provided.
A second tape guide is provided at a position slightly separated from the tape guide means.
To the magnetic head of the tape running with the
The regulation of the contact position is different from the regulation by the second tape guide means.
Subsequent regulation by the first tape guide means
To be performed in two steps,
Performing the control accurately without causing excessive force on the tape
Is made possible. (C. Conventional technology) (a. General background) In a recording / reproducing apparatus using a magnetic tape as a recording medium,
The contact position of the magnetic tape with the magnetic head is highly accurate.
Need to be regulated. That is, the recording track on the magnetic tape is
Core gap (hereinafter referred to as “core gap”)
U. ) In the tape width direction.
Or, the direction of the recording magnetic signal and the direction of the core gap are
When the magnetic tape does not match well, the magnetic tape
Contact will reduce the playback output of the recorded signal.
In particular, the decrease in playback output due to these causes is recorded.
The higher the frequency of the signal, the more noticeable. Therefore, the magnetic tape moves the recording head relative to the magnetic head.
The hook is not displaced with respect to the core gap.
In addition, the direction of the recording magnetic signal and the direction of the core gap match.
Must be in contact with each other.
The contact position of the magnetic tape with the magnetic head is precisely regulated.
Need to be done. By the way, the storage of signals on the magnetic tape is
Do not form recording tracks extending in the direction parallel to the running direction.
In the case of Tep players, etc., which are performed in
The tape cassette holds the magnetic tape housed in it.
The part that passes through the front of the cassette case is
Attached to the recording / reproducing unit in a direction facing the head, and
The position of the tape cassette in the recording and
Is defined by the cassette holding means loaded with the
The magnetic head is relatively forward with respect to the magnetic tape
The magnetic tape on the head surface of the magnetic head
It is to be contacted. Therefore, in such a tape player etc.
The position where the tape contacts the magnetic head is the tape cassette.
Of the recording / reproducing section
Is regulated to some extent, but the magnetic head and
The positional relationship with the set holding means and the cassette
Position of the tape cassette or the tape cassette
To always have a certain high precision in dimensional accuracy etc. of each part
Is virtually impossible, and running magnetic tape
Slightly in the width direction due to changes in back tension
Position of the magnetic tape will change.
The cassette holding means regulates the contact position with respect to the magnetic head.
It is extremely difficult to perform the operation with high accuracy by the method described above. Therefore, this type of tape player has been
The contact position of the magnetic tape with the magnetic head.
The tape guide for controlling
The engagement is provided in a fixed state. (B. Example of conventional tape guide) [FIG. 6] FIG. 6 shows a conventional tape guide provided in a tape player or the like.
3 shows an example of a tape guide. In the same figure, a indicates a magnetic head b and a head holding.
The head holding member a is separated in the left-right direction,
And two side plates c and c 'which are positioned in parallel and opposed to each other.
The upper plate d and the upper plate d connecting the rear portions of the upper and lower edges of the side plates c and c '.
And the lower plate e is a substantially horizontal and long rectangular frame when viewed from the front and back.
And the front edges of the side plates c and c '.
Notch to test a roughly U-shaped shape that is long in the vertical direction when viewed from the side
f, f 'are formed, and the upper and lower sides of the notches f, f' are formed.
Surface (hereinafter, referred to as “tape contact surface”)
g, g 'and the tape contact surfaces g, g' from the upper and lower ends.
The part protruding toward (hereinafter referred to as "restriction piece")
h and h 'constitute tape guides i and i'.
You. j is a head case of the magnetic head b,
The front surface of the source j, that is, the head surface k is
This head surface is formed so as to form a kana arc surface.
k, while the tip surfaces of the head cores l, l 'are vertically
It is arranged at a distance. m and m 'are the core gaps of the head cores l and l'.
And the core gaps m and m 'extend in the vertical direction.
positioned. The top of the head surface k of the magnetic head b
A little before tape contact surface g, g 'of tape guide i, i'
To the head holding member a in a state where it protrudes toward
And the core gaps m and m 'are positioned at the top.
It is location. Therefore, the magnetic head b is moved relative to the magnetic tape n.
Forward, the magnetic tapes n are separated from each other in the running direction.
The two positions are the tape contact surfaces of the tape guides i and i '.
g, g 'and both side edges are lighter than the regulating pieces h, h'.
And the middle part between the above two positions
The magnetic head b comes into contact with a substantially top portion of the head surface k.
You. Thus, the portion of the magnetic tape n facing the magnetic head b
The position of this part with respect to the magnetic head b
The position is regulated by the tape guides i and i '.
Will be regulated. (D. Problems to be solved by the invention) [FIG. 6, FIG.
Figure] However, such a tape guide i, i '
And the contact position of the magnetic tape n with the magnetic head b.
The control is performed on both sides of the magnetic head b in the tape running direction.
That is, at a position immediately before contact with the head surface k of the magnetic head b,
For example, for some reason.
The tape cassette is positioned slightly higher than the magnetic head b.
When mounted or slightly lower
Means that the magnetic tape n contacts the tape guides i and i '.
Of the part where the front of the cassette case is passed
Is curved downward as shown by the dashed line in FIG.
Or it will be curved upward,
The two parts in contact with the tape guides i, i '
Since the portion between them is also curved, the magnetic head of the magnetic tape n
The problem that the contact position for b will be considerably shifted
There is a title. Incidentally, such a displacement of the contact position is caused by the tape cassette.
Limited to positional deviation in the height direction from the magnetic head b
The guide inside the cassette provided on the tape cassette
The inclination of the tape can be changed by a sudden change in tape tension, etc.
May occur. Therefore, in the height direction between the magnetic tape n and the magnetic head b,
Head of magnetic tape n even if there is a displacement
The position of contact with b is regulated as accurately as possible
The magnetic head n of the magnetic tape n
Of the tape in the width direction.
The magnetic tape is one of the two restricting pieces of the tape guide
Made contact with the magnetic head when pressed
Tape guides have been proposed. That is, FIG. 7 is described in Japanese Utility Model Publication No. 60-67535.
The tape guides o and o 'are shown.
The tape contact surfaces p, p 'of the ids o, o' are
Guide surfaces q, q 'having a length slightly shorter than the tape width of
It is continuous with the lower end of the guide surface q, q '
From the back of the magnetic tape n
The biasing surfaces r and r 'are inclined, and the magnetic tape n
When traveling while contacting these tape guides o and o ', magnetic
The lower side edge of the air tape n has the urging surfaces r and r '.
The upward movement force caused by moving in contact
Will be energized. Therefore, the magnetic tape n
Contact position of the part facing the magnetic head b with the magnetic head b
In the regulation, the upper side edge of the magnetic tape n is the upper regulation piece h,
h 'to be regulated.
You. However, such tape guides o and o '
Also determines the contact position of the magnetic tape n with the magnetic head b.
Control only at the position immediately before contact with the magnetic head b.
The path of the magnetic tape n is curved as described above.
If it is, the magnetic head b must face
Position is also offset from the magnetic head b
Will be. (E. Means for Solving the Problems) Therefore, the tape guide device of the tape player of the present invention
In order to solve the above problems,
And both ends of the magnetic head
And the tape contacts from the thickness direction
First and second tapes formed to have a width smaller than the width of the tape
A contact surface and a portion above the first and second tape contact surfaces.
Tape that projects almost perpendicular to the tape contact surface from the end
Slant forward from the path reference part and the lower edge of the tape contact surface
A first tape gear having a downwardly projecting biasing inclined portion;
On both sides of the magnetic head in the tape running direction.
At a position separated from the first tape guide means,
Third and fourth tapes formed to have a width greater than the width of the tape
The contact surface and the upper and lower ends of the third and fourth tape contact surfaces.
A pair of restricting pieces each protruding from the portion,
The center in the tape width direction of the tape contact surface of No. 4 is
It is arranged at the same height position as the center in the tape width direction.
And second tape guide means. Therefore, the tape guide device of the tape player of the present invention
According to the contact position of the running tape with the magnetic head
The direct regulation of the position is made by the first
This will be done by the tape guide means of
The restriction of the contact position by the first tape guide means is
The upper edge is pressed against the regulating piece by the movement force acting on the biasing surface.
And the second
The position is roughly regulated by the tape guide means.
Will be. Therefore, the first tape guide of the tape
Control of the contact position with the magnetic head by means of tape
To the position just before contact with the magnetic head.
Without changing the tape path suddenly
The contact position of the tape with the magnetic head
Can be regulated with high accuracy and the condition is stable
Can be held. (F. Example) The tape guide device of the tape player of the present invention is described below.
Will be described in accordance with an embodiment shown in the accompanying drawings. It should be noted that the embodiment shown in the drawings applies the present invention to a dual-caps
Applied to tongue type audio tape player 1
Things. (A. Mechanical Chassis) [FIGS. 1 and 2] Reference numeral 2 denotes a mechanical chassis formed of a synthetic resin. The mechanical chassis 2 is formed in a long plate shape in the left-right direction.
And reels from both left and right ends near the rear edge
The table support shafts 3 and 3 'are located at the left of the portion near the front edge.
Arm support shafts 4 and 4 'from both right ends and the front end
A predetermined distance in the left and right direction of the part slightly behind the edge
The cassette positioning pins 5, 5 'are separated from the separated positions.
Each is integrally formed so as to protrude upward
You. Reference numerals 6 and 6 'denote the positions of the cassettes in the mechanical chassis 2.
The mechanism is located at a position slightly separated from the
Support provided while penetrating chassis 2 in the thickness direction
A sleeve, which will be described later on the support sleeves 6 and 6 '.
Capstan is supported. In addition, about the parts other than the above of the mechanical chassis 2,
This will be described later in the description of each member. (B. Capstan, reel base) [FIGS. 2 and 3] Reference numerals 7 and 7 'denote capstans, and these capstans are provided.
7, 7 'are located below the mechanical chassis 2 and the motor 8
From a capstan pulley (not shown)
The support sleeve is erected and substantially lower half thereof is the support sleeve.
6, 6 'rotatably supported. And the right side of these two castons 7, 7 '
7 (hereinafter referred to as “F-side capster”)
Display mode, that is, the magnetic tape is moved in the forward direction.
Keys that function in the mode of playing while running
The capstan and the capstan 7 'on the left (hereinafter
"R side castan" is called. ) Reverse play mode
While the magnetic tape is running in the reverse direction.
Capsta functioning in playback mode
And the F-side capstan 7 rotates counterclockwise in FIG.
Direction, the R side capstan 7 'is clockwise.
It can be rotated at the same time. Reference numerals 9 and 9 'denote reel bases.
Spur gear-shaped gear portions 9a, 9a'a and gear portions 9a, 9'a
And reel engaging shafts 9b, 9'b, which are erected from the center of the upper surface of
Are integrally formed, and the reel support shaft is
3, 3 'rotatably supported. 10 is rotatably provided on the rear end of the upper surface of the mechanical chassis 2.
The intermediate gear 10 is provided with the two gears described above.
9 (hereinafter referred to as "F-side reel table")
Say ) Gear part 9a from the front left side
I have. (C. Tape cassette, tape cassette to player
2 and 3] 11 is a tape cassette called a so-called compact cassette
It is. 12 is a cassette case for the tape cassette 11.
Windows 13, 13,... On the front wall 12 a of the cassette case 12.
・ Is formed. 14 and 14 'are in the cassette case 12.
The tape reel 15 is rotatably housed.
And fixed to the reels 14 and 14 'and wound in a predetermined amount.
Air tape, 16 and 16 'are the left of the front part in the cassette case 12.
The folding guides, 17, 17, ...
The part close to the front wall 12a of the set case 12 is
Position facing the portion where the windows 13, 13, ... are not formed
Guide inside the cassette installed in the cassette, 18 is the cassette case
At a position substantially supported by the leaf spring 19 at the approximate center of the front of
It is a pad placed. A part of the magnetic tape 15 is the cassette case 12.
Between the front surface 12a of the cassette and the guides 17, 17, ... in the cassette
Through the path extending through the
At positions corresponding to the recording windows 13, 13,.
You will be outside of case 12. Then, the tape cassette 11 is attached to the player 1.
When the tape cassette 11 is installed, the cassette case
The mechanical chassis 2 is inserted into a positioning hole (not shown) formed in
The cassette positioning pins 5 and 5 '
To position the player 1
A not-shown cap formed at the front end of the cassette case 12
The capstans 7, 7 'are inserted into the
The air tape 15 approaches the capstans 7 and 7 'from the front side.
Or lightly touched and two tapes
The reels 14, 14 'are the reel engaging shafts 9b of the reel bases 9, 9',
9'b and the right tape reel 14 (hereinafter referred to as "T
". ) And the F side reel base 9 are tapes on the left side.
Reel 14 '(hereinafter, referred to as "S reel") and the left reel.
Table 9 '(hereinafter referred to as "R-side reel table").
Each of them rotates integrally. (D. Head Base Block) [FIGS. 1 to 5] Reference numeral 20 denotes a head base block.
The lock 20 moves on the upper surface of the mechanical chassis 2 in the front-rear direction.
Head base supported at the moment and attached to the head base
Head holding member, tape guide member, and head
The magnetic head held by the holding member and the head holding member
Provided on the main tape guide provided and the tape guide member
And an auxiliary tape guide. (D-1. Head base) [FIG. 1, FIG. 2, FIG. 4, FIG.
5] 21 is a head base. The head base 21 is formed in a plate shape that is substantially long in the left-right direction.
From the front side edge of the main portion 21a so as to form a substantially inverted L-shape.
A push button 23 is attached to the protruding portion 22, and the main portion 21a
Control pieces 24, 24 'project rearward from rear edge of
Have been. 25, 25 'are formed near the left and right edges of the main part 21a.
Long holes in the front and rear direction, 26 and 27 are at the rear right of the main part 21a.
Front / rear direction formed near the side edge and near the center of the front
Long guided hole, 28 is the spring arrangement hole, 29 is the spring arrangement hole
It is a spring hook hole formed behind 28. The head base 21 is located on both left and right edges of the main portion 21a.
And the side edges of the guided holes 26 and 27 are on the upper surface of the mechanical chassis 2.
Slides in the guide grooves of the guide projections 30, 30,.
By movably engaging the upper surface of the mechanical chassis 2
When supported movably within a certain range in the front-back direction,
The front end portion is arranged in the arrangement hole 28 and the front end thereof is
The rear end of the tension spring 31 attached to the
Engages forward movement force by being hooked into hook hole 29
And it is not pressed backward.
The notch is a notch formed at the center of the left edge of the spring arrangement hole 28
Stopper with rear edge of 28a formed on mechanical chassis 2
By contacting the projection 32, the position shown in FIG.
In addition, a magnetic head described later is attached to the tape player 1.
Between the front of the cassette case 12 of the tape cassette 11
Position facing each other (hereinafter referred to as “non-play position”)
U. ). In addition, the cassette positioning erect from the mechanical chassis 2
The lower ends of the pins 5, 5 'are elongated holes 25, 25' of the head base 21.
It is located relatively movably within. (D-2. Head holding member, main tape guide) [Fig.
To FIG. 5] 33 is a head holding member. The head holding member 33 is provided on the main portion 21a of the head base 21.
Left and right sides having a length of about half the length in the left and right direction
To the bottom plate 34, which is elongated in
It is located opposite the row and has a substantially rectangular plate shape when viewed from the side
The lower half of the bottom plate is near the left and right ends of the bottom plate 34.
Wall plates 35, 35 'connected to the position and the upper ends of the wall plates 35, 35'
With the upper plate 36 positioned so as to be bridged between the front ends of the
Left and right ends of the bottom plate 34
Mounting holes 37 and 37 'are formed in the portion. 38, 38 'after the wall plates 35, 35' of the head holding member 33
A main tape guide integrally formed at an end of the main tape guide;
Loop guides 38, 38 'on the rear end faces of the wall plates 35, 35'
Cutouts 39 and 39 'that are long in the vertical direction
It is formed by cutting. That is, the main tape guides 38, 38 'are at the rear ends of the wall plates 35, 35'.
Restriction pieces 4 located on both the upper and lower sides of the notches 39, 39 '
0, 40 ', biasing pieces 41, 41' and notches 39, 39 '
A tape consisting of a part other than the part forming the lower surface of the restraint pieces 40, 40 '
And contact portions 42, 42 '.
Tape contact surfaces 42 and 42 '.
In addition, the tape contact surfaces 42 and 42 '
a, 42'a and the lower end of the contact surface 42a, 42'a.
As it moves away from the contact surfaces 42a and 42'a, it is almost diagonally downward and rearward.
Biasing surfaces 42b and 42'b which are displaced toward. And, in the vertical direction of the contact surfaces 42a, 42'a
Length L ₁ (See FIG. 5) is the tape width of the magnetic tape 15.
It is slightly shorter. Also, the upper and lower surfaces of the urging surfaces 42b and 42'b
The inclination angle α with respect to the direction (see FIG. 5) is stipulated.
You can't do that, but you should generally choose between 40 ゜ and 60 ゜
It is preferable that the angle is approximately 40 ° in this embodiment.
You. As shown in FIG. 3, the tape contact portions 42 and 42 'are
Make a gentle arc surface that projects backwards when viewed from the side
Is formed. (D-3. Magnetic Head) [FIGS. 1 to 5] Reference numeral 43 denotes a magnetic head. 44 is a shield case of the magnetic head 43,
The surface 44a facing the rear of the case 44, that is, the head surface
Has a gentle arc that protrudes backward when viewed from above
It is formed for. 45L, 45R, 46L, 46R is the head core (the front end in the drawing
Only the surface is shown. ) And these head cores 45L, 4
5R, 46L, 46R are arranged at predetermined intervals in the vertical direction
And the core gaps 47, 47, ... are formed.
Provided with the front end face located at the head face 44a.
Have been. The magnetic head 43 has two head surfaces 44a.
Between the main tape guides 38, 38 'and the head
The top of the surface 44a is the contact surface 42a, 4 of the main tape guide 38, 38 '.
Hold the head while projecting slightly backward from 2'a
It is held by a member 33. (D-4. Auxiliary Tape Guide) [FIGS. 1 to 5] Reference numeral 48 denotes a tape guide member. The tape guide member 48 is provided at the bottom of the head holding member 33.
Formed in a plate shape that is slightly longer than plate 34
Base 49, and upward from both left and right ends of the base 49
The rising portions 50, 50 'and the rear portions of the rising portions 50, 50'
Protruding rearward from the part closer to the top facing the
Guide that is substantially rectangular in the vertical direction when viewed from behind
The parts 51 and 51 'are integrally formed of a synthetic resin. 52, 52 'are located at the rear ends of the guide portions 51, 51'
An auxiliary tape guide, and the auxiliary tape guides 52 and 5
2 'is a part excluding the upper and lower ends of the rear end of the guide parts 51, 51'
Tape contact surfaces 53, 53 'and the tape contact surfaces 53, 5
Control pieces 54, 54 'and 5 projecting rearward from upper and lower ends of 3'
5 and 55 ', the vertical direction of the tape contact surfaces 53 and 53'
Length L at _Two (See FIG. 5)
Slightly longer than the loop width. Note that the tape contact surfaces 53 and 53 'face rearward when viewed from above.
It is formed in the shape of a gentle arc that protrudes,
Its width, that is, its length in the left-right direction, is
The length is about half of the length. Then, a mounting hole is provided at a position near the rising portion 50, 50 'of the base 49.
56 and 56 'are formed. 57 is a positioning projection formed on the lower surface of the base 49. (D-5. Head of head holding member and tape guide member
FIGS. 1 to 5] 58 and 58 'are the front edges of the main portion 21a of the head base 21.
Screw holes formed at positions spaced apart in the left-right direction.
Are the front guided hole 27 and the left screw hole 5 of the main portion 21a.
This is a positioning hole formed at a position between 8 ′. The head holding member 33 and the tape guide member
48 is attached to the head base 21 as follows. That is, the head holding member 33 and the tape guide member 48
The tape guide member 48 is located above the main portion 21a of the headon base 21.
A positioning projection 57 is formed on the head base 21 at the front edge of the surface.
Into the positioning hole 59
Front and rear with respect to the head base 21 by the positioning means
Positioning in the horizontal and horizontal directions, and holding the head
The member 33 is not shown on the upper surface of the base 49 of the tape guide member 48.
Position with respect to the tape guide member 48
The mounting holes 37 and 37 'of the head holding member 33
And in the mounting holes 56, 56 'of the tape guide member 48 in this order.
The end of the threaded screws 60, 60 'is formed on the head base 21
Into the screw holes 58, 58 'formed by the
Fixed to the base 21. (D-6. Positioning of main tape guide and auxiliary tape guide
1, 3 and 5] The main tape guides 38 and 38 'and the auxiliary tape guides
The guides 52 and 52 'are located between them and the magnetic head 43 and the like.
It has the following positional relationship. That is, the left-right direction (this direction is the running direction of the magnetic tape 15)
In the same direction. ) In the main tape guide 38,
38 'are located on both sides of the head surface 44a of the magnetic head 43,
Whether the auxiliary tape guides 52, 52 'are the main tape guides 38, 38'
From the anti-magnetic head 43 side with a predetermined distance
You. Also, the tape contact portions 42 of the main tape guides 38, 38 ',
42 'contact surfaces 42a, 42'a and auxiliary tape guides 52, 52'
Tape contact surfaces 53, 53 'are arranged on a straight line in the horizontal direction
Therefore, in the front-back direction,
Is located. And, in the height direction, the auxiliary tape guide 52,
In the height direction of the tape contact surface 53, 53 'of 52'
The position is four head cores 45L, 45R, 46L of the magnetic head 43
And the middle position in the height direction of the portion where 46R is arranged
(Hereinafter referred to as “reference position”).
Of the main tape guides 38, 38 '.
The upper ends of the contact surfaces 42a, 42'a are auxiliary tape guides 52, 52 '.
Slightly lower than the upper ends of the tape contact surfaces 53, 53 '
Is placed. The magnetic head 43 has its reference position
The magnetic tape of the tape cassette 11 mounted on the
Position of the tape 15 opposite to the center of the tape width.
Therefore, the tape cassette 11 is transferred to the tape player 1.
When installed, the tape contact section of the main tape guides 38, 38 '
Tape contact surfaces of 42, 42 'and auxiliary tape guides 52, 52'
53, 53 'and the magnetic tape 15 should face each other at almost the same height
become. (D-7. Movement to Play Position) However, as described above, the head base 21 moves backward.
Front end of the movement range while not pressed toward
Is held in the non-play position.
When the tape cassette 11 is mounted on the tape player 1,
Magnetic head 43, main tape guides 38, 38 'and auxiliary tape
The guides 52 and 52 'are the cassette cases 12 of the magnetic tape 15.
At a slight distance from the front where the front part of
Will face each other. Then, the head base 21 is pushed backward by a predetermined amount.
When the head base 21 is
And the magnetic head 43, main tape guide
Tapes 38, 38 'and auxiliary tape guides 52, 52'
The front of the cassette case 12 formed on the front wall 12a of the cassette 11
Entry into cassette case 12 through windows 13, 13, ...
As a result, the head surface 44a of the magnetic head 43 and the main
Tape guide surfaces 42, 42 'of tape guides 38, 38' and auxiliary tape.
The tape contact surfaces 53, 53 'of the tape guides 52, 52'
It will come into contact with the recording surface of the loop 15. Incidentally, the magnetic head 43 and the like move the magnetic tape 15 in this manner.
The position of the head base 21 in contact with the
I position ". (E. Pinch roller, reel base, drive gear) [FIG.
3] 61 and 61 'are pinch rollers, and the pinch rollers 61, 61'
61 'is the arm whose base end is provided on the mechanical chassis 2.
Pinch roller arm rotatably supported on support shafts 4 and 4 '
Are rotatably supported by the rotating ends of the arms 62, 62 ',
When the head base 21 is at the non-play position, the second
As shown in the figure, all of them are capstans 7, 7 '.
Are positioned at a slight distance forward, and the head base 21 is
When it is moved backward by being moved to the a position
In both cases, the tape running direction is the forward direction (hereinafter
Below, it is called "forward state". )
The right pinch roller 61 is pressed against the F-side capstan 7
When the tape running direction is the reverse direction (hereinafter,
Berth state ". ) Indicates the left pin
So that the chill roller 61 'is pressed against the R-side capstan 7'.
It has become. 63 has a substantially central portion provided at the rear end of the mechanical chassis 2.
Swinging lever rotatably supported by the support shaft 64
And the reel is attached to the support shaft 63a that projects downward from the rear end.
The table drive gear 65 is rotatably supported and the reel base
Illustration in which the large gear 65a of the drive gear 65 is rotated by a motor
Not always engaged with the transmission gear. Then, the swing lever 63 is not played by the head base 21.
When in the position, as shown in FIG.
The position of the protrusion 63b provided in the portion is
The reel is regulated by the control pieces 24 and 24 '.
The small gear 65b of the table drive gear 65 is
Neutral that does not mesh with any of the gear portions 9'a of the rule base 9 '
Position, and forward
When the head base 21 moves to the play position from the state
Small gear of reel base drive gear 65 rotated clockwise
65b is connected to the gear portion 9a of the F-side reel base 9 via the intermediate gear 10.
The head base 21 is in the play position from the reverse state when meshed.
When the reel moves to the counterclockwise direction,
The small gear 65b of the stand drive gear 65 is the gear part of the R side reel stand 9 '.
9'b. (F. Running of tape) Then, the tape cassette 11 is mounted on the player 1.
The head base 21 to the play position
When it moves, the motor 8 rotates and the capstans 7, 7 '
Is rotated in the above-described direction, and the reel base drive gear 65 is rotated.
Is rotated counterclockwise and forward
, The small gear 65b of the reel base drive gear 65 is the intermediate gear 1
0, the F side reel base 9 is engaged with the F side reel base 9.
The table 9 and the T-reel 14 engaged with it are rotated counterclockwise.
The pinch roller 61 on the right side
Since it is crimped to the F-side capstan 7 with the
The air tape 15 moves in the forward direction, that is, from the S reel 14 '.
Runs in the direction in which it is fed out and wound on the T reel 14.
You will be squeezed. In the reverse state, the reel base drive gear 65
Of the R side reel base 9 ', the small gear 65b of the
When the reel base 9 'and the S reel 14' engaged with the reel base 9 '
When the pinch roller 61 'on the left
It is crimped to the R-side capstan 7 ′ with the magnetic tape 15
Therefore, the magnetic tape 15 moves in the reverse direction,
From the reel and wound on the S reel 14 '
Will be run to. (G. Playback operation) [FIGS. 3 and 5]
The reproducing operation is performed at the contact position of the magnetic tape 15 with the magnetic head 43.
The main tape guides 38, 38 'and the auxiliary tape guide 52,
Be performed in a state regulated precisely by 52 '
become. (G-1. Rule of contact position of magnetic tape to magnetic head)
First, the magnetic properties of the tape guides 38, 38 'and 52, 52'
Regulation of the contact position of the tape 15 with the magnetic head 43
Will be explained. (G-1-a. Contact to Magnetic Tape such as Tape Guide
(State) [FIG. 3] As described above, the head base 21 is moved to the play position.
When moved, the head surface 44a of the magnetic head 43 and the main tape guide
Tape contact portions 42, 42 'of the
The tape contact surfaces 53, 53 'of the magnetic tapes 52, 52'
Touch the part where the front part of the cassette case 12 is passed
Will do. In this case, the head surface 44a of the magnetic head 43 is
Tape contacts 42, 42 'of the tape guides 38, 38' and auxiliary
The tape contact surfaces 53, 53 'of the tape guides 52, 52' are shown in FIG.
As shown in, the guide 1 in the cassette of the tape cassette 11
Move to a position slightly behind the front side of 7, 17, ...
Be moved. Therefore, in the two cassettes on the left side of the magnetic tape 15,
Guide in the cassette between the guides 17 and 17 and the right side
The path between 17 and 17 is almost at the center of these parts
The tape contact surfaces 53 and 53 'of the tape guides 52 and 52'
Is pushed slightly backwards,
The two inner magnetic tapes 15 adjacent to each other
The part between the guides 17 and 17 in the set is almost
The top of the head surface 44a of the air head 43, that is, the head core 45
Core gaps 47, 47, ... of L, 45R, 46L, 46R are located
Contact with the part that is
The head is pressed against the head surface 44a with strong pressing force,
The part on both sides of the part that is in contact with the
Tape guides 42, 42 'of tape guides 38, 38' come into contact
This results in a shape slightly pressed backward. Thus, the magnetic tape 15 is attached to the main tape guides 38 and 38 '.
The tape contacts 42, 42 'and the auxiliary tape guides 52, 52'
Contact surfaces 53, 53 'and the head surface 44a of the magnetic head 43.
It is wound with a moderately strong tension
Will be in contact. (G-1-b. Regulation by the auxiliary tape guide) [FIG.
FIG. 5] Then, the contact position of the magnetic tape 15 with the magnetic head 43
Before the contact with the magnetic head 43, the auxiliary
Guides 52, 52 'with the approximate accuracy
You. That is, as described above, the auxiliary tape guides 52 and 52 '
The length of the tape contact surfaces 53 and 53 'in the vertical direction is magnetic.
Slightly longer than the tape width of the air tape 15 and in the vertical direction
Is the reference position of the head surface 44a of the magnetic head 43.
Is located at the same height as the
Of the part that is passed through the front of the
Contacts the tape contact surfaces 53, 53 'of the tape guides 52, 52'.
The two positions (hereinafter, referred to as “primary regulated positions”)
The height of the center in the width direction of the portion between them is the first
The height of the regulation position in the tape width direction is
Restricted by the control pieces 54, 54 'and 55, 55'
By doing so, the height is substantially the same as the reference position of the magnetic head 43.
It will be regulated. In this case, the state in which the tape player 1 is mounted
Of the tape cassette 11 in the vertical direction of the magnetic tape 15
Depending on the position accuracy, the width of the magnetic tape 15
Height of the center of the magnetic head 43 with respect to the reference position
Direction, the magnitude of the deviation is extremely small.
It will be kept to a very small amount. (G-1-c. Regulation by main tape guide) [FIG. 3, FIG.
5] Then, the contact position of the magnetic tape 15 with the magnetic head 43
The final restriction on the placement is that
This is done by the tape guides 38, 38 '. That is, as described above, the main tape guides 38, 38 '
The tape contact portions 42 and 42 'are slightly shorter than the tape width.
Continuous to the contact surfaces 42a, 42'a and the lower ends of the contact surfaces 42b, 42b'b
And the biasing surfaces 42b and 42g'b,
Contacts the tape contact parts 42 and 42 ',
The side edges contact the urging surfaces 42b, 42'b,
Therefore, when the magnetic tape 15 runs in such a state,
The side edges moving in contact with the urging surfaces 42b and 42'b
The movement force to the direction will be energized. Therefore, the main tape guides 38 and 38 'of the magnetic tape 15
Between two positions in contact with the tape contacts 42, 42 'of the
The upper side edge is above the main tape guides 38, 38 '.
Pressing from below onto the lower surface of the side regulating pieces 40, 40 '
And the height with respect to the magnetic head 43 is
It will be tightly regulated. In addition, the main tape guides 38, 38 '
The height of the magnetic tape 15 with respect to the magnetic head 43 is
Performed in a state roughly adjusted by loop guides 52 and 52 '
Without imposing excessive force on the magnetic tape 15,
Without changing the tape path suddenly in the height direction
Will be done. Then, the contact of the magnetic tape 15 with the magnetic head 43
The position is roughly regulated by the auxiliary tape guides 52 and 52 '.
Two stages of high-precision regulation by the main tape guides 38 and 38 '
Will be regulated. (G-2. Playback) However, in the play mode, the magnetic tape 15
The contact position with respect to the air head 43 was regulated as described above.
In the forward state, and
The upper two 45 of the four head cores of the ki head 43
L and 45R are provided with pickup function and on magnetic tape 15
Is played for the two forward tracks,
In the reverse state, the lower two head cores
46L and 46R are provided with pickup function and magnetic tape
15 two reverse tracks are played
Will be. (H. Playback level test) Tables 1 and 2 are for the magnetic head 43 of the magnetic tape 15.
The main tape guides 38, 38 'and
When using the auxiliary tape guides 52 and 52 '
It shows a part of the test effect that tested the effect.
The data described in Tables 1 and 2 are obtained by the magnetic head 43.
The reproduction level was measured under the following conditions. That is, as a standard tape for level checking,
A first standard tape with the number recorded at a frequency of 315 Hz;
The audio signal has a frequency of 10 KHz and the first standard tape
2nd standard tape recorded at 10dB lower level
In addition to preparing the types, two tape players (hereinafter referred to as
Below, it is called "test machine". ) For each
Guides 38, 38 'and auxiliary tape guides 52, 52'
The first test state where the auxiliary tape guide 52
A second test condition with only 52 ', main tape guide 38,
A third test condition with only 38 ', main tape guide 38,
38 'and auxiliary tape guides 52, 52'
In four kinds of test states of four test states, the first, second,
Measure the playback level for the two standard tapes and
The measured reproduction level for the first standard low and the second
The difference between the playback level and the standard tape
is there. In addition, such a measurement of the reproduction level is performed by the above-described four methods.
On magnetic tape 15 with head cores 45L, 45R, 46L and 46R
For each of the playback levels for the
Done. That is, “NL” in Tables 1 and 2 is
The playback level of the forward L channel, "N-R"
The playback level of the forward R channel, "RL"
Source L channel playback level, "RR" is reverse
Indicates the reproduction level of the R channel. Therefore, in such tests, the first standard data
Playback level for the tape and the second standard tape
The difference from the playback level should be -10dB or this value
A close value, for example, a value within the allowable range of about -10 ± 2 dB
If so, the contact of the magnetic tape 15 with the magnetic head 43
Position regulation is not enough to obtain good playback output.
That is to say, it has been done with reasonable accuracy. However, as shown by the numerical values in 1 and Table 2, there are four types
The fourth test state among the test states of
Both the guides 38, 38 'and the auxiliary tape guides 52, 52'
In the case of a beam, either the first tester or the second tester
Value within the range of -10 ± 2dB
As a result, the magnetic head of the magnetic tape 15 is
Auxiliary tape guides 52, 52 'regulate contact position with respect to 43.
Regulation and regulation by main tape guides 38 and 38 '
If you are on the floor, the above contact position by this kind of tape guide
Regulations can always be stably and accurately performed
I understand. (G. Effects of the Invention) As is clear from the above description, the present invention
The tape guide device of the tape player uses a magnetic head
And both ends of the magnetic head
And the tape contacts from the thickness direction
First and second tapes formed to have a width smaller than the width of the tape
Between the tape contact surface and the first and second tape contact surfaces.
Projects almost perpendicularly to the tape contact surface from the upper end
Before the tape path reference part and the lower edge of the tape contact surface
And a biasing inclined portion projecting obliquely downward.
Tape guide means and both sides of the magnetic head in the tape running direction.
At a position separated from the first tape guide means.
Third and fourth tapes formed to be wider than the width of the tape.
Tape contact surface and the upper and lower sides of the third and fourth tape contact surfaces.
A pair of restricting pieces each protruding from the end,
The center of the fourth tape contact surface in the tape width direction is the magnetic head
Position so that it is at the same height as the center in the tape width direction.
And second tape guide means.
You. Therefore, according to the present invention, the magnetic head of the running tape is
First, the contact position with respect to the magnetic
When it comes to a position slightly before the position where it contacts the
Can slightly move in the tape width direction by the tape guide means
Regulated with sufficient margin, i.e. roughly
And then come to a position where it contacts the magnetic head
The upper edge of the first tape guide means is a tape path base.
It will be regulated by being pressed against the subsection
You. That is, the contact position of the tape with the magnetic head is the second position.
By the tape guide means and the first main tape guide
What is done by two-stage regulation by means of means
Become. Thus, the tape guide device of the tape player of the present invention
According to the position, the contact of the running tape with the magnetic head
The final restrictions on position are located on both sides of the magnetic head.
To be performed by the first tape guide means.
However, the regulation by the first tape guide means is the second tape.
The condition is generally regulated by loop guide means
To the tape's magnetic head
Accurate without restricting the contact position on the tape
The recording surface of the tape and the magnetic field
Precise positioning between the air gap and the core gap
Can be adjusted automatically. In the embodiment described above, the first tape guide hand is used.
Shows the step and the second tape guide means as separate parts
However, these two types of tape guide means are integrally formed.
You may do it. In the above embodiment, the present invention is applied only to the reproducing function.
Audio tape player with two keys
The ones applied to those with capstan are shown,
The invention is not limited to such application examples.
Tape player with a capstan
Various tapes such as tape players with recording and playback functions
Can be applied to players. Also, the present invention relates to a tape player having recording and reproducing functions.
Layer, that is, when applied to a so-called recording / reproducing machine,
An erase current is supplied to the tape contact surface of the guide means.
An erase head to erase the recording signal
Supply the erase current to the erase head only during recording.
It is possible to do. This way, in particular,
When performing so-called self-recording
Make sure that the path and the tape path during playback are exactly the same.
it can.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 5 show an embodiment in which a tape guide device of a tape player according to the present invention is applied to an audio tape player, and FIG. 1 shows one example of a mechanical chassis and a head base. FIG. 2 is a schematic plan view showing the mechanical deck in a non-reproduction state, FIG. 3 is a partially omitted enlarged sectional view taken along the line III-III of FIG. 1, and FIG. FIG. 5 is an enlarged perspective view showing the head base block in an exploded state, and FIG.
FIG. 6 is an enlarged sectional view taken along the line V, FIG. 6 is a front view showing an example of a conventional tape guide, and FIG. 7 is a perspective view showing another example of a conventional tape guide. Explanation of reference numerals 1 ... tape player, 15 ... tape, 38, 38 '...
First tape guide means, 40, 40 ',... Tape path reference portion (of first tape guide means), 42a... First tape contact surface (of first tape guide means), 42'a ......
A second tape contact surface (of the first tape guide means), 42
b, 42'b ... biasing inclined portion (of the first tape guide means), 43 ... magnetic head, 52, 52 '... second tape guide means, 53 ... (second tape guide means) ) Third tape contact surface, 53 '... (of the second tape guide means) fourth tape contact surface, 54, 54', 55, 55 '... (of the second tape guide means) Piece

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Takeyoshi Takashina               4-814 Matsugishicho, Choshi City Co., Ltd.               In the Talon                (56) References JP-A-61-258362 (JP, A)                 JP-A-59-144061 (JP, A)                 60-67535 (JP, U)

Claims (1)

(57) [Claims] A first and a second, which are disposed on both sides of the magnetic head in the tape running direction, project forward from both ends of the magnetic head, and are formed to have a width smaller than the width of the tape by contacting the tape from its thickness direction. A tape contact surface, a tape path reference portion projecting substantially perpendicularly to the tape contact surface from an upper end of each of the first and second tape contact surfaces, and a front diagonal from a lower end of the tape contact surface. A first tape guide having a biasing inclined portion protruding downward; and a width wider than the width of the tape at a position separated from the first tape guide on both sides of the magnetic head in the tape running direction. And a pair of regulating pieces protruding from upper and lower ends of the third and fourth tape contact surfaces, respectively. 4 The center of the tape contact surface in the tape width direction A tape guide device for a tape player, comprising: a second tape guide means disposed at the same height position as the center of the magnetic head in the tape width direction. 2. The upper ends of the first and second tape contact surfaces are the third tape contact surfaces.
2. The apparatus according to claim 1, wherein said first tape guide means is disposed with respect to said second tape guide means so as to be lower than an upper end of a fourth tape contact surface. Tape guide device for tape players.