JPS63100663A - Elevating device for magnetic tape cassette - Google Patents

Abstract

PURPOSE:To reduce load both when a holder holding a cassette goes up and when it finishes its rise by constituting such that a spring energizes a moving member in one direction and such that the holder goes down to a tape travel position due to the rotation and drive of a cam and the moving member. CONSTITUTION:The cassette is inserted in a direction A1. Upon the completion of the insertion, a motor drives to rotate the cam 112. The spring 125 energizes the moving member 124 in the direction F1. Due to the turn of the cam 112, a follower 133d turns counterclockwise with a shaft 133c as a center, and the member 124 is pushed in a direction F2. A drive member 137 turns counterclockwise, the moving member 146 moves in the direction F1, while a longitudinal member 144 moves in the direction A1. The cassette holder 14 goes down to move to the tape travel position. Unless the holder goes down, the spring 125 energizes the moving member to abut the cam and the follower. Hence the load is reduced when the holder goes up and when its rise is completed.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a lifting device for magnetic tape cassettes.

In the magnetic tape recording/reproducing device mounted on the vehicle, it is necessary to apply a biasing force to the magnetic tape cassette in order to stabilize the tape running during the movement of the vehicle.

The prior art of such a vibration isolation mechanism is shown in FIG. A holder 301 holding a magnetic tape cassette 300 is moved up and down by a lifting lever 302.

One end of a spring 303 is connected to the chassis, and the other end of the spring 303 is connected to this lifting lever 302. The lifting lever 302 is angularly displaced around the shaft 304, thereby causing the holder 301 to move up and down. FIG. The magnetic tape cassette 300 is pressed onto the magnetic tape cassette 300 by the force of the spring 303 . Therefore, even if the tape deck vibrates, the tape can always run stably. In such prior art, the lifting/lowering operation of the magnetic tape cassette 300 is performed using the lifting lever 30.
2 is angularly displaced clockwise in FIG. 32(1) against the spring force of the spring 303. As a result, the holder 301 performs a lifting operation in the lifting direction E1, and rises to the lifting position completion position shown in PIS 32 (2).

Problems to be Solved by the Invention In the above prior art, when the holder 301 moves up, the spring 3
It is necessary to angularly displace the lifting lever 302 against the spring force of 03, so a large load is applied when lifting.
A pair are provided on each of the left and right sides of the holder 301. Therefore, the number of parts increases.

An object of the present invention is to solve the above-mentioned technical problem and to reduce the load on the holder holding the magnetic tape cassette when the holder is raised and at the completed position of the magnetic tape cassette. The purpose is to provide equipment.

Means for Solving the Problems The present invention provides a holder that holds a magnetic tape cassette 13 and is movable between a tjS1 position for inserting/ejecting the magnetic tape cassette 13 and a second position for running the magnetic tape cassette 13. 14as14b, and is provided in relation to the holders 14a and 14b, and is provided in one direction F1.
a spring 125 that biases the moving member 124 in the moving direction F1; a follower 133d associated with the moving member 124;
33d, and has a cam surface 112a that drives the spring 12.
Eff7133d except when the holders 14a, 14b are at least in the ttS2 position due to the spring force of Eff7133d.
is brought into contact with the cam surface 112a by the spring force of the spring 125,
When the holders 14a and 14b are in the second position and are supported in contact with the fixed position, the follower 133d is in contact with the cam surface 1.
12a and such a cam means spaced apart from each other.

Function According to the present invention, the moving member 124 provided in association with the holders 14a and 14b is movable in one direction F1,
This moving member 124 is urged in the moving direction F1 by a spring 125. Further, the moving member 124 is driven via the follower 133d by driving of the cam means. At the second position where the magnetic tape cassette runs the tape, the cam surface 112a of the cam means is separated from the follower 133d, and therefore the holders 14a, 141+ are pressed together by the spring force of the spring 125. Also, the magnetic tape cassette 13 is pressed from the second position where the tape is transported, and the holders 14a and 14b are moved to the first position where the tape is inserted/ejected.
When displacing, the cam means is driven, the cam surface 112a of the cam means and the follower 133d abut against each other by the spring force of the spring 125, and the moving member 124 is displaced against the spring force of the spring 125, As a result, the holders 14a, 14
b is moved up and down to the first position.

In this way, one spring 125 has the dual functions of sucking and crimping the magnetic T-cassette 13, thereby reducing the load on the holders 14a and 14b when they are raised and at the completed position. Can be done. Further, it is sufficient to provide only one spring 125, and the number of parts can be reduced. In addition, holders 14a and 14b
The holders 14a, 14b do not receive the spring force of the spring 125 when the lift is completed, and the load can be reduced.

Embodiment FIG. 1 shows a magnetic tape recording/reproducing device W according to an embodiment of the present invention.
FIG. 2 is a front view of L10, FIG. 3 is a rear view thereof, :jSJ is a right side view thereof, FIG. 5 is a left side view thereof, and FIG. Figure 6 is its rear view. Referring to these drawings, magnetic tape recording/
Reproduction r! The left and right sides of the chassis of i (hereinafter referred to as tape deck) 10! ! 11a and 11b are provided with holders 14a and 14b that hold the magnetic tape cassette 13 so as to be movable up and down.

The magnetic tape cassette 13 is placed horizontally in the holders 14a and 14b, and the magnetic tape is inserted in the insertion direction AlflI.

Bottom of the chassis! ! ! 15 (in front of the page in Figure 1)
1l) is equipped with a gripping means 16 for gripping the magnetic tape cassette 13. This gripping means 16 is a gripping member 16
a, 16b. The gripping members 16a, 1 (ib) are supported by a driving member 17 and are movably driven within a plane including the upper surface of the magnetic tape cassette 13.
a, 1 lb, but the idle rail 18a, 1
8b along the insertion direction A1 and the ejection direction A2.

A moving member 124 that is movable along the moving direction F (left-right direction in FIG. 1) is disposed on the loading frame 19.
This moving member 124 is combined with an operating lever 21 . The loading frame 19 is formed with a guide elongated hole 22 extending along the insertion direction A1 of the magnetic tape cassette 13. The drive member 17 is displaced along this guide slot 22 as described in fi, so that the magnetic tape cassette 13
It is also possible to move from the tape insertion end position to the ejection position via the gripping means 16.

FIG. 6A is a simplified diagram showing the drive system of the tape deck 10. Referring also to FIGS. 1 to 6, rtL of the chassis! ! ! 15 is provided with a motor 23. A pulley 24 is fixed to the output shaft of this motor 23. An endless belt 26 is attached to the pulley 24 and the right seven live wheels 25a.
is wrapped around. Further, the belt 26 is in contact with a 7-life wheel 25b, and the 7-life wheels 25a and 25b are driven by the motor 23 to rotate in the direction of the arrow in the #SQA diagram. The flywheel 25a has
The marking/re-soil surface nL27 is fixed coaxially. Gears 28 and 29 mesh with this recording/reproducing gear 27.
8 meshes with a gear 30, and 21 gears 31 are coaxially attached to this gear 30. A gear 32 meshes with the gear 31, and a drive gear 33 is fixed coaxially to the gear 32.

A performance/fast-forward switching gear 35 is interposed between the gear 29 and the flywheel 25bl: a fast-forwarding surface wheel 34 which is coaxially fixed to the flywheel 25bl. (see Fig. 6), the drive mechanism (to be described later) is used for fast forwarding 1! When the electromagnet 36 is in the OFF state, the switching tll is engaged.
tL35 meshes with gear 29.

teeth! 1135 meshes with gear 37, and this tooth $137 meshes with tooth $381: meshes, 2f) tl 11381: j
! S'r -E/ f) Bottom! ! ! An idler gear 39 is fixed coaxially at a position above 15. This tooth 1138 and the idler tooth 7t139 are used for tape running switching 8! which will be described later. Depending on the mechanism, the m wheel 41 meshes with either the gear 40a or the gear 41 which is coaxially fixed to the pivot of the left take-up reel 40, and the m wheel 41 is coaxially fixed to the pivot of the right take-up reel 42. Idler teeth that mesh with the 42m gear! 'l! 39 is a tooth]? When meshing with L41, the right take-up reel 42 is driven to rotate in the direction of the arrow, and when the idler gear 39 is released from meshing with teeth $41, and when meshing with teeth 1iL 40 m, the left take-up reel 42 rotates in the direction of the arrow. ? The IIS reel 40 is driven to rotate.

The gear 29 also meshes with a gear 43, to which a drive gear 44 is fixed coaxially. This drive gear 44
meshes with the forward and backward notch teeth lI45 of the head stand.

FIG. 7 is an exploded perspective view of the gripping members 1ea, 16b and related parts, and FIG. 8 is an exploded perspective view of the gripping members 1ea, 16b and parts related thereto.
6b is a simplified plan view of the vicinity; FIG.

The gripping member 16m includes a straight portion 50 and a bent portion 51. With respect to the insertion direction A1 of the magnetic tape cassette 13 of the curved portion 51, an ascending grip member 16 is provided at the upstream end.
A holding claw 52 is formed that extends toward the proximal direction of b.

The upstream end surface of the holding claw 52 in the insertion direction A1 constitutes a guide surface 53 that guides the text part 13m of the magnetic tape cassette 13, and the downstream end face of the holding claw 52 in the insertion direction A1 is formed as a guide surface 53 for guiding the text part 13m of the magnetic tape cassette 13. The end surface constitutes a retaining surface 54 that engages and holds the protrusion 13a of the magnetic tape force set 13. A boss 55 having a shaft hole is formed at the downstream IN end of the bent portion 51 in the insertion direction A1.

Further, the straight portion 50 of the gripping member 16a has a locking hole 56.
is formed, and a tension spring 57 is connected to this locking 7tuk 56. Further, a guide shaft 58 is formed in this straight portion 50 and extends downward.

The other gripping member 16b also has the same configuration as the gripping member 16a, and corresponding parts are shown with subscripts.

! ! The moving member 17 includes a flat base 60 and a flat base 60.
Guide grooves 63 and 84 are formed in the guide pieces 61 and 62, which are provided at both ends in the width direction. A gripping member 16a is provided on the front side of the base 60.

A step surface 65 is formed so that the tension spring 57 does not come into contact with the upper surface of the base 60 when the tension spring 16b is inserted onto the drive member 17 along the insertion direction A1. A notch 66 is formed continuous with this stepped surface 65.

Further, on the front surface 60a of the base portion 60, locking pieces 67 and 68 are formed that hang down near both ends in the width direction.

A notch 69.70 is also formed in the base g60.

This notch 69 has a support surface 7 parallel to the upper surface of the base 60.
1 and a circular arc surface 72 that is perpendicular to this support surface 71. Similarly to the notch 69, the other notch 70 is defined by a support surface 73 and a circular arc surface 74. A pivot shaft 75 is erected on the support surface 71 and inserted through the insertion hole of the boss 55 . Another support surface 7
3 is provided with a pivot shaft 76 that is inserted through the insertion hole of the boss 55b.

The base 60 is also formed with guide slots 77,78. The guide holes 77, 78 have the gripping members 16a, 16
The guide shafts 58, 58b of b are inserted, and the gripping members 16a, 1
6b is displaced along the guide slots 77 and 78 as the magnetic tape cassette 13 is inserted/ejected. ? A guide shaft 79 is provided upright on the rear side of the & portion 60. Further, a guide shaft 80 extending downward is formed on the lower surface of the end of the base 1560. This guide shaft 80 is connected to the guide slot 22 of the loading frame 19.
Get stuck in.

The actuating lever 21 includes a base u81 and a boss 82 fixed to the lower surface of the base 81. The base g81 has a guide piece 83.
is formed, and a guide hole 84 is formed in this guide piece 83. A guide hole 85 is also formed in the base 81 into which the guide shaft 79 fits. This guide hole 8
5 is a straight #1 portion 85a extending in the longitudinal direction of the base n81 and an inclined portion 85 bent and extending toward the insertion direction All.
b, and a lock portion 85e. base 81
One end of a torsion spring 88 is connected to f! of this torsion spring 88. ! The end is fixed to the loading frame 19.

Pressing surfaces 89 are formed on the base 81, and these eight pressing surfaces cause the limit switches S W 1 to 7 as described later.
The cutter 90 can be pressed.

Next, the mounting state of the gripping member IGa=113b, the driving member 17, and the operating lever 21 will be explained.

The guide shafts 58, 58b of the gripping members 16a, IGb fit into the guide elongated holes 77, 78 of the drive member 17, and the insertion holes of the bosses 55, 55b of the gripping members 16a, 16b fit into the pivot shafts 75 of each drive member 17. .76 is inserted. Thereby, the gripping members 16a, 1f3b are spring-biased by the spring force of the spring 57 in a direction toward each other around the pivot shafts 75,76. As a result, the magnetic tape cassette 13
When inserted, the protrusion 13m is held by the holding claws 52, 52.
It can be held securely by b.

FIG. 9 is a sectional view taken from the cutting plane line ff-IM in figure MS8, tJSl (l is a sectional view seen from the cutting plane line xx in FIG. 8, and FIG. 11 is a sectional view taken from the cutting plane line ff-IM in FIG. Cutting surface 1n-xt
FIG. Engagement pins 91a*91b protruding outward are formed in the holders 14a and 14b, respectively. These engagement pins 91a, 91b are connected to guide elongated holes 11a3.11 formed in the side walls 11a+11b of the shaft.
b3 (magnetic tape cassette that fits into figure fls4 and (see figure /rrS5)) 13 is placed horizontally, and holder 1
4a, 14b are inserted from the front side toward the insertion direction A1.

Referring to FIG. 10, the ffi moving member 17 has a guide piece 61.
62, supported by the idle rails 18a and 18b,
In addition, it is supported by a retaining ring 93 that is locked to the lower end of the guide shaft 80. In this way, since the drive member 17 is supported on the chassis at three points, it does not wobble due to vibrations, etc., and therefore the magnetic tape cassette 13 can be inserted/ejected smoothly. can. Furthermore, even if an undesired force is applied when inserting/ejecting the magnetic tape cassette 13, the drive member 17 will not be angularly displaced within the plane including the guide rails 18a, 18b, thus ensuring smooth insertion/ejection. can perform actions.

Furthermore, as shown in FIG. 11, the guide wheel 58b and the boss 55
Therefore, when the protrusion 13a presses the guide surface 53.degree. Even if a force is applied in the direction indicated by , the gripping members 16a and 16b do not tilt and can maintain a horizontal state.

Therefore, the protrusion 13a of the magnetic tape cassette 13 can be reliably held by the holding claws 52, 52b.

FIG. 12 is a diagram for explaining the operation of the gripping members 16a, 16b when inserting/ejecting the magnetic tape cassette 13. The magnetic tape cassette 13 is inserted into the holders 14a, 14b from the front side in a lateral direction. At this time, the gripping members 16a and 16b are in the state shown in FIG. Manually insert the magnetic tape holder 3 in direction A.
As a result, the protrusion 13a of the magnetic tape cassette 13 comes into contact with the guide surface 53 as shown in FIG. 12(1). When the magnetic tape cassette 13 is further pushed in in this state, the gripping members 16a,
16b is pushed out in the direction indicated by arrow 95 in FIG. 12(1) within a plane including the upper surface of the magnetic tape cassette 13 against the spring force of the spring 57, and is expanded in the insertion direction A1 of the protrusion 13a.
After both ends of the downstream side of the magnetic tape cassette 13 pass the top of the holding claw 52.52b, they are closed by the spring force of the spring 57 by the engaging surface 54. 17 locking pieces 67.68 (
(see FIG. 7), and the magnetic tape cassette 13 is securely gripped by the engaging surfaces 54, 54b as shown in FIG. 12(2). In this way, the gripping members 16a, 16
b is configured to be openable and closable along the top surface of the magnetic tape cassette 13, and holds the protrusion 13a of the magnetic tape cassette 13 by holding claws 52, 52b, as shown in Pt513, the gripping member 16a, Since the upper surface of 16b is gripped in a lower state, the tape deck can be made thinner.

Next, the magnetic tape cassette 1 shown in FIG. 12 (2)
When the forger further pushes in the magnetic tape cassette 13 slightly while it is being held by the gripping members 16a and IGb of No. 3, the drive member 17 is actuated by the spring force of the torsion spring 88 in the state shown in Fig. 3 (2) of fjS12. The drive member 17 is pushed in the insertion direction A1 by the action of the lever 21, that is, the drive member 17 is moved in the insertion direction A1 via the guide ring 79 by the clockwise angular displacement of the operating lever 21 in FIG. 12(2). until it reaches the end position in the insertion direction. When the magnetic tape cassette 13 reaches the extreme position in the insertion direction, the pressing surface 89 of the actuating lever 21 presses the seventh actuator 90 of the limit switch SWI. As a result, limit switch SW1 becomes conductive, and motor 2
3 is powered.

By energizing the motor 23, the holders 14a and 14b begin to move downward, as will be described later.

When ejecting the magnetic tape force set 13, an eject button (not shown) is operated, thereby releasing the electromagnetic plunger 10.
2 (see FIG. 15) becomes conductive, and the electromagnetic plunger 102
The drive shaft 102a (see FIG. 15) retracts. This allows rotation of the upper notch m wheel 103 (see FIG. 15). Therefore, the holders 14a*14b are raised/lowered Jf
One mechanism raises the magnetic tape cassette from the loading completion position and reaches the magnetic tape cassette insertion end position. This upward movement of the holders 14a and 14b causes the pongee 138 (
7 and 15) is displaced from the straight portion 85a of the guide hole 85 of the actuating lever 21 to the inclined portion 85b, whereby the actuating lever 21 moves around the axis of the boss 82 at the arrow mark G (see Fig. 7). begins to undergo angular displacement in the direction.

As a result, the driving member 17 and the gripping member 16a.

16b begins to move toward the discharge direction A2. Tsumugi 138
When the guide hole 85 moves to the lock portion 85c of the guide hole 85, the driving member 17 and the gripping member 16a=16b reach the ejection direction completion position. It should be noted that at the end of the ejection, the magnetic tape cassette 13 is held by the gripping members 16a and 16b, and therefore the magnetic tape cassette 13 is prevented from flying out from the ejection port due to the ejection operation. After that, the agitator pulls out the magnetic tape cassette 13 toward the front (in the ejection direction), and as a result, the holding claws 52 and 52b holding the text section 13 m are angularly displaced in the direction of arrow 95 in FIG. 12 (2). , the magnetic tape cassette 13 is the gripping member 1
The held states from 6a and 16b are released.

In this way, the gripping members 16a and 16b can be freely opened along the upper surface of the magnetic tape cassette 13, and the text part 13a of the magnetic tape cassette 13 is held by the opening and closing operations of the holding claws 52 and 52b of the gripping members 16a and 16b. hand,
Since the tape deck 1o is moved for insertion/ejection, it is possible to make the tape deck 1o thinner. Further, the drive member 17 is supported at three points, the guide pieces 61 and 62, and the guide 180, and the drive member 17 is detached from the idle rail 18a,
18b and the guide elongated hole 22 to allow reciprocating displacement, angular displacement in a plane including the insertion direction of the drive member 17 is prevented, and furthermore, the drive member 17 is prevented from being angularly displaced in a plane that includes the insertion direction. Angular displacement can be prevented and extremely smooth insertion/ejection operations can be performed. Furthermore, by providing the locking pieces 67 and 68 as the contact surface of the magnetic tape force set 13 of the drive member 17, the contact area can be reduced. I! The influence of warpage or deformation of the single member 17 and impact force of the magnetic tape cassette 13 can be further reduced. Furthermore, one spring 57
Since the holding claws 52, 52b are opened and closed by the spring force, the number of parts can be reduced.

FIG. 14 is a plan view of the elevating mechanism for the magnetic tape cassette 13, and FIGS. 15 and 16 are exploded perspective views of the elevating mechanism and its related components. Chassis bottom wall 15
A pongee 110 is erected.

This ring 110 has an upper notched gear 103 and a lower notched tooth! $
1104 is rotatably supported. This lower notch tooth 1
Notches 104tt 104b are formed at t1104 at intervals of 18° in the circumferential direction. Lower notch gear 1
04 has upwardly protruding protrusions 104c and 10
4d will be erected. In addition, a protrusion 104e having an insertion hole through which the pongee 110 is inserted is provided in the center part of the lower notch TA wheel 104.
will be erected. This protrusion 104e is a circle f2g104
f, and drive parts 104g, 104 that protrude outward in the radial direction at 180° intervals on the outer circumferential surface of this circular part 1°4f.
h.

One end of a torsion spring 111 is in contact with either the projection 104c or the projection 104d, and the other end of this torsion spring 111 is in contact with the ground 123k of the blocking member 123, and the ring portion 1
11a is fitted into and fixed to the post 123b. A semi-circular cam 104k is formed on the lower surface of the lower notched gear 104, as shown in FIG. 15A.

A notch 103a is formed in the upper notch gear 103. A cam 112 is fixed to the upper surface of this upper notched gear 103. The cam surface 112& of this cam 112 has an I:lS1 force surface 113 that extends linearly, and an arc-like shape that is connected to the upper notch of the f:rs1 cam surface 113 and the upstream end in the rotational direction Y of the m wheel 103. It has a Pr 52 force surface 114 and a substantially S-shaped 13 force surface 115 extending between the first cam surface 113 and the second cam surface 114 . The second cam surface 114 is
The end part connected to the ptSl cam surface 113 has a minimum diameter R1 with respect to the shaft hole 116, and the diameter gradually increases as it goes in the opposite direction of the rotation direction Y, and reaches the maximum diameter R2 at the end part connected to the tjS3 cam surface 115. It is curved into a circular arc.

The vicinity of the minimum diameter of the second cam surface 114 faces the notch 103m. One end of a torsion spring 117 comes into contact with the cam surfaces 113, 114° 115.

The ring portion 117a of this torsion spring 117 is connected to the movable member 118.
tj3 of the torsion spring 117.
is fixed to the chassis. Therefore, the upper notch ti car 1
03 is spring biased in the rotational direction Y by a torsion spring 117.

A boss 1181+ having an insertion hole coaxial with the projection 118a is formed on the lower surface of the movable member 118. A pivot 119 provided upright on the chassis fits into this boss 118b. This allows the movable member 118 to be angularly displaced about the axis of the pivot 119 . The movable member 118 includes
At the end opposite to the protrusion 118a, a head stand 160
(See FIG. 21) A locking recess 118c is formed that can lock the locking pin 120 that is provided upright. Further, the movable member 118 includes protrusions 104c and 10 of the lower notched gear 104.
It has a locking surface 118d that can come into contact with 4d.

Furthermore, this movable member 118 has an upper notched tooth I'111.
A locking protrusion 118e that comes into contact with a locking surface 500d (see FIG. 17) formed on the lower surface of 03 is formed.

One end of a screw spring 121 is connected to this movable member 118, and the shaft portion 121a of this torsion spring 121 is fitted into the boss 118b, so that the torsion spring 121 is rotated. The ends are fixed to the chassis. As a result, the movable member 118 is biased in the direction of arrow C by the spring force of the torsion spring 121.

Upper notch teeth! A cam 500 coaxial with the shaft hole 116 is formed on the lower surface of the tt103, as shown in FIG. This cam 500 is partially cut out, and has an arc-shaped cam surface 500a whose diameter gradually increases toward the downstream side in the rotation direction Y.
and a planar, radially outwardly extending locking surface 500.
b, 500c, the locking surfaces 500b, 500c
are formed at intervals of 180° in the circumferential direction, and drive pieces 12 of a blocking member 123 that prevents rotation of the upper notched gear 103.
It comes into contact with the locking surface 123al of 3a. During performance, the movable member 118 engages with the locking surface 500d of the cam 500 of the upper notched tooth IL103, thereby preventing the upper notched gear 103 from rotating. In this state, the lower notched gear 104 does not mesh with the 7-force gear 33, and therefore the upper notched gear 103 does not rotate. However, if the electromagnetic plunger 102 is energized by mistake, the Then, the blocking member 123 is angularly displaced to release the upper notched bevel gear 103 from blocking rotation. Therefore, the locking protrusion 118e of the movable member 118 allows the upper notch tooth 11 to
If the rotation of the magnetic tape cassette 103 is not prevented, the upper notch gear 103 will rotate by mistake, and this will cause the magnetic tape cassette 13 to start moving upward, resulting in damage to the head, etc. is prevented.

A boss 123b is provided upright on the blocking member 123. This boss 123b has lllff51 of the torsion spring 111.
11m will be covered. A shaft (not shown) that stands up on the chassis is inserted into the insertion hole of the boss 123b, thereby allowing the blocking member 123 to be angularly displaced around the axis. The blocking member 123 has a drive! ! ! ll teeth rrL33
An insertion hole 123c is formed through which the insertion hole 123c is inserted. Furthermore, guide projections 123b and 123i are provided upright on the blocking member 123. As a result, the magnetic head 162 and the printed circuit board 680
The lexical board 681 that electrically connects the 7 lexiple board 681 is prevented from coming into contact with the blocking member 123 and other displaced or rotating members. Further, this blocking member 123 is formed with a hanging portion 123d. A lock @123e is formed in this hanging portion 123J. This locking ryt12
3el:? When the electromagnetic plant gear 102 into which the retaining part 102b formed at the end of the magnetic run gear m of the four-magnetic plant gear 102 is energized and the ff1a pongee 102a retracts, the blocking member 123 moves in the direction of the arrow D (Fig. 15). reference)
The notch gear 103 is slightly angularly displaced in the opposite direction, and the notched gear 103 is meshed with the drive tooth rrL33 by the spring force of the spring 117. This a electromagnetic plunger 102 is demagnetized, and the spring 11
A spring force of 1 returns the blocking member 123 to the predetermined position.

A loading frame 19 is constructed above the upper notched bevel gear 103, the blocking member 123, and the like. A moving member 124 that can be displaced in a direction F perpendicular to the insertion direction A1 of the magnetic tape cassette 13 is mounted on the loading frame 19.

One end of a tension spring 125 is connected to the moving member 124, and the 1! ! ! The end is a rope.

It is connected to the locking 7 hook 126 of the wing frame 19.

As a result, the moving member 124 is spring-biased in the direction of arrow F1. The moving member 124 is formed with guide elongated holes 127, 128, and 129 extending along the moving direction F1. A guide protrusion 130 erected on the loading pedestal 19 is fitted into the guide elongated hole 127, a guide protrusion 131 erected on the loading pedestal 19 is fitted into the guide elongated hole 128,
A guide protrusion 132 erected on the loading frame 19 is fitted into the guide elongated hole 129, and a guide hole 133b erected on the drive piece 133a of the drive fIJ member 133 is fitted into the guide hole 124. 135 is formed.

This guide hole 135 is inserted in the insertion direction A1 of the magnetic tape cassette.
extends in the direction. Furthermore, the moving member 124 is provided with approximately L
A portion 13 formed in a letter shape and extending along the moving direction F1
6a and a portion 136 extending orthogonally to this portion 136a.
A guide hole 136 having a diameter of 1.b is formed. This guide hole 1
The drive protrusion 137a of the drive member 137 fits into the drive member 36.

A pongee 1 is attached to the right side of the movable member 124 in FIG.
38 will be erected.

This sleeve 138 fits into the guide hole 85 of the actuation lever 21.

A shaft hole 139 is formed in the loading frame 19, into which the pivot shaft 133C of the drive member 133 is fitted. Cam surface 1 of upper notched gear 103
A follower 133d that protrudes so as to come into contact with 13, 114, and 115 is fixed. This follower 133d fits gently into the curved guide hole 142 of one loading frame 19, and the cam 1 disposed below the loading frame 19.
12 cam surfaces 113, 114, and 115. By rotating the upper notch 1111103 in the Y direction, the follower 1
33d is from end P1 to end P2 of PIS2 cam surface 114
The period during which the follower 13 is in contact with the
The period when 3d is in contact with the third cam surface 115 from the end P2 is the insertion operation period, and when it is in contact with the #S1 cam surface 113, it is the 3-down operation period. Loading frame 19
A limit switch SWI is attached to the limit switch SWI, and an insertion hole 143 through which the protrusion 123r of the blocking member 123 is inserted is formed near the cutter 90 of the limit switch SWI. Further, a guide groove 600 into which the protrusion 137a of the drive member 137 fits is formed.

Further, a ring 900 is erected on the loading frame 19, and this sleeve 900 is inserted through the insertion hole of the post 82 of the actuation lever 21. This allows the operating lever 21 to be angularly displaced around the pongee 900.

Note that the actuating lever 21 is connected to the torsion spring 88 as described above.
The pongee 900 is biased clockwise in FIG. 15 by the pongee 900.

When the upper notched bevel gear 103 is rotationally driven by the drive gear 33, it is guided by the second cam surface 114 of the cam 112, and
The follower 133d is angularly displaced about the axis R of the pivot 133c in the counterclockwise direction in FIG.

As a result, the moving member 124 is displaced in a direction opposite to the moving direction F1. Further, the follower 133d is connected to the third cam surface 115.
When the #Sl cam surface 113 is reached from the spring 125
The moving member 124 is displaced along the moving direction F1 by the spring force.

Referring to FIG. 16, lW of the chassis:! l1a, 11
Longitudinal members 144a and 144b are attached to the outer side of b. rc Senju member 44ait shape connecting piece 145
It is connected to the moving member 146 via.

Further, the other longitudinal member 144b is a fan-shaped connecting piece 1.
It is connected to the moving member 14G via 47.

The connecting piece 145 is angularly displaceable around the sleeve 145a, and the other connecting piece 147 is angularly displaceable around the sleeve 147. A guide hole 149 is formed in the longitudinal member 144b, through which the projection 148a of the lifting lever 148 is inserted. This guide hole 149 is formed to extend in a direction perpendicular to the longitudinal direction of the longitudinal member 144b. Further, a guide hole 150 that extends in the longitudinal direction is formed in this longitudinal member 144b, and this guide hole 150 has an I! ! ! The protrusion 11b1 formed on llb is inserted gently. Such a configuration of the longitudinal member 144b is similar to that of the other longitudinal member 144a.
The same applies to

A shaft hole 148C is formed in the lifting lever 148, and a ring 11b2 formed on the fI wall 11b is fitted into the shaft hole 148c, whereby the lifting lever 148 is angularly displaced around the pongee 11b2. It is possible.

1lllllb has a lifting guide hole 11b3 extending along the lifting direction E. 11b4 is formed. Holder 14b
The engagement pin 91b of (1!II!!!) is inserted through the guide hole 11b3 of 11b, and further inserted through the guide hole 148b of the lifting lever 148.
b1 is inserted through the guide hole 11b4 of the side gttb.

As a result, the holder 14b moves up and down along the ascending direction E1 or the descending direction E2 by the angular displacement of the lever 148 about M11b2.

The protrusion 111J1 of the side wall 11b is easily inserted into the guide hole 150 of the longitudinal member 144b. As the longitudinal member 144b is displaced in the insertion direction A1 or A2, the protrusion 148a of the lifting lever 148 is displaced, and the lifting lever 14
8 is angularly displaced around the ring 11b2.

The elevating lever 148 and its related structure are also provided on the longitudinal member 144al.

At the end of the longitudinal member 144bill of the moving member 146,
Retention holes 400 and 401 are formed. This retaining hole 400
A biasing member 153 having a retaining hole 152 at a position corresponding to
is supported by the movable member 14G by a pin 154 so as to be angularly displaceable. One end of a tension spring 155 is connected to one end of this biasing member 153.
! ! The end is connected to a locking hook 156 of the moving member 14G. ! ! ! ! The driving protrusion 137b of the moving member 137 is inserted through the engagement hole 152 of the biasing member 153 and the engagement hole 400 of the moving member 146. Angular displacement of the driving member 137 causes the moving member 146 to move in the moving direction F1 or F2.
direction, thereby elongate member 144a;
144b is displaced in the insertion direction A1 or A2 direction. Along with this displacement of the longitudinal members 144a+144b, the lever 148 is angularly displaced, thereby causing the holders 14a, 14b
performs a lifting motion along the lifting direction.

! ! FIG. S18 is a simplified diagram showing the elevating mechanism of the magnetic tape cassette 13. FIG. 18 shows a state in which the discharge is completed, and in this state, the upper notch gear 103 is prevented from rotating by the blocking member 123. Also motor 2
3 is deactivated. Furthermore, since the drive protrusion 138 is located at the locking portion 85e of the guide hole 85 of the operating lever 21, the operating lever 21 resists the spring force of the torsion spring 88 and stops in the state shown in the second plS18 figure. . This state is also caused by the follower 133 as shown in FIG. 18A (1).
d is spaced apart from the cam 112. In this state, the magnetic tape cassette 13 is inserted, and the gripping members 16a, 1
6b, and the locking piece 67. of the drive member 17.
When the end surface of the magnetic tape cassette 13 comes into contact with 68 and is further pushed in slightly, the actuating lever 21 is angularly displaced clockwise in the figure PTS 18 by the spring force of the torsion spring 88. As a result, the magnetic tape cassette 13 reaches the end position in the insertion direction A1 together with the drive member 17, as shown in FIG. 19. In this state, the protrusion 137a of the drive member 137 is inserted into the portion 13 of the guide hole 136 of the moving member 124.
6a, and angular displacement of the drive member 137 is prevented.

In such a state shown in FIG.
is energized. At the same time, the moving member 124 is slightly moved by the spring force of the spring 125 along the moving direction F1. As a result, the follower 133d comes into contact with the cam surface 115 of the cam 112, and at the same time, as shown in FIG. is removed, ffi! ! ! ! The circulation blocking state of the 1 member 137 is released. In this state, as described above, the drive gear 33 rotates due to the electric power applied to the motor 23, which causes the upper notch tooth $1103 to rotate, so that the follower 133d comes into contact with the t53 cam surface 115. Therefore, the moving member 124 moves slowly along the moving direction F1 as the upper notch tooth f11103 rotates. Accompanying this, the driving member 137 is angularly displaced, and the moving member 146 is displaced in the moving direction F2 by the action of the driving protrusion 137b. Therefore, the longitudinal members 144a, 144b
is displaced in the insertion direction A1, and the lever 148 is moved in the direction of arrow 1'7B.
angular displacement in the direction (see figure IjS20I3). As a result, as described above, the holders 14a and 14b descend in the E2 direction, and the movable member 124 moves
The state in which the magnetic tape cassette 13 has reached the "ra" position is the state in which the fall of the magnetic tape cassette 13 has been completed, and such a state is shown in FIG. This completes loading of the magnetic tape cassette 13. In addition, in such a state where the fall is completed, Pt518
As shown in Figure B (1), the locking surface 123 of the blocking member 123
al is in contact with the locking surface 500b of the cam SOO, and the rotation of the upper notched gear 1.3 is locked.

At the time of ejection, the electromagnetic plant gear 102 is turned on, thereby causing the blocking member 123 to be angularly displaced and the upper notch gear 103 to be unlocked. Therefore, the upper notched gear 10
3 is rotationally driven, thereby causing the follower 133d to rotate to the second position.
The moving member 124 is guided along the cam surface 114, thereby displacing the moving member 124 in the moving direction F2. Along with this, the drive 5!1 member 137 is angularly displaced in the counterclockwise direction in FIG.

Therefore, the moving member 14G moves along the moving direction F1, and as a result, the holders 14a and 14b rise. In the raised state, as shown in FIG. 19, the drive protrusion 137a of the drive member 137 fits into the portion 136a of the guide hole 136, thereby preventing the drive member 137 from rotating.

Therefore, the rising operation is locked. - the crab notch gear 103 rotates further, thereby causing the first
From the insertion-most position shown in FIG. 9, the follower 133d is further moved in the moving direction F2. Therefore, the actuating lever 21 is angularly displaced against the spring force of the torsion spring 88 while being guided by the protrusion 138 inserted through the guide hole 85 of the actuating lever 21 .

As a result, the drive member 17 moves in the discharge direction A2 and reaches the discharge completion position shown in FIG. 18. In the ejection completion state shown in FIG. 18, the blocking member 12
3 and the cam 500 are in the ra relationship shown in FIG. 18B (2), so the drive protrusion 123r of the blocking member 123 maintains the conductive state of the limit switch SWI. Therefore, the upper notched gear 103 continues to rotate, and the blocking member 123 comes into contact with the locking surface 500c of the upper notched tooth 103 as shown in FIG. 188 (3), so that the blocking member 123° is normally After the angular displacement reaches the position, the pressing force of the limit switch SWI's 7 actuator 90 is released. At the same time, the motor 23 stops. The ejection operation is thus completed.

In this way, the upper notch 1 is opened by driving the motor 23.
Since the cam 112 and the follower 133d of the 1J car 103 are used to perform the lifting and lowering operations, smooth lifting and lowering can be achieved with quiet operation noise. Further, although a plunger dedicated to lifting and lowering has been used in the past, this embodiment does not use such a plunger, thereby reducing the number of parts.

Moreover, the timing of the insertion operation, insertion completion operation, and dropping operation of the magnetic tape cassette 13 can be performed reliably with a simple mechanism.

Note that when the magnetic tape cassette 13 has been raised completely, the second
As shown in Figure 0A, the driving protrusion 137b is connected to the retaining hole 152.
The contact surface 152a facing the upstream side of the moving direction F1 and the engagement hole 4
The drive protrusion 1 is held between the contact surface 400a facing the downstream side in the moving direction F1 of
37b is biased in the moving direction F311111, the retaining pins 91a, 91b are further biased in the upward direction E1 while in contact with the guide holes 11a3°11b3, as shown in FIG. 20B. Therefore, the holder 14a,
14b is reliably positioned in the height direction at the raised position. Also, the spring 155 for applying this biasing force is
Since no Fj V is applied during the rise, the load during the rise is reduced.

Furthermore, in this embodiment, the tension spring 125 serves both of the functions of sucking in the magnetic tape cassette 13 and crimping the magnetic tape cassette 13, so that even when the tape deck 10 vibrates, a stable state can be maintained. can do.

In the conventional technology for stabilizing the magnetic tape cassette 13 during such vibrations of the tape deck 10, two springs are used, and a locking mechanism that uses the spring force of these springs to keep the magnetic tape cassette 13 in a locked state even when ejection is completed is used. A force is applied in the direction E2 to move the magnetic tape cassette 13 downward, and therefore a large load is applied to release the lock fil. These problems of the prior art can be solved by providing a locking mechanism using one spring 125 and the actuating lever 21 so that no spring force is applied to the holders 14a, 14b during locking.

FIG. 21 is a plan view of the head stand 160 and the vicinity of the upstream tape running switch Isokare 161, and FIG.
FIG. 23 is an exploded perspective view of the tape running switching switch 161. Referring to these drawings, the head stand 160 includes a mounting portion 163 to which the magnetic head 162 is mounted, and a mounting portion 163 to which the magnetic head 162 is mounted.
Magnetic tape y! from both ends of 163! c A pair of IFNIISl 64.16 extending to the filling opening side (lower side in Fig. 21)
5.

Near both ends of the mounting portion 163, there are pinch a-ra 166a.
, 166b, holding members 167a and IG
7b is arranged. This holding member 167a is rotatably supported around a sleeve 168a provided upright on the chassis. Another holding member 167b is rotatably supported by a base 168b that is provided upright on the chassis. The holding member 167a includes a pair of upper and lower holding pieces 169a.
, 170a and a connecting portion 700a connecting these holding pieces 169a and 170a, a torsion bone 171a is interposed between the holding piece 169a and the holding piece 170a,
This torsion spring 171a is attached to the sleeve 168a.

One end of the screw spring 171a abuts the connecting portion 700m,
The a end of the torsion spring 171a is attached to the mounting part 1 of the head stand 160.
Locking piece 163al erected at 63: Abuts. Another holding member 167bt has a similar configuration, and corresponding parts are shown with suffixes. The crimping torsion springs 171m+171b are crimped to the holding members 167a, 1 (S7b
Since both ends are connected to each other, by pressing am of torsion springs IVia and 171b as described later, pinch rollers 166a and 166b can be brought into pressure contact with capstans 174 and 175, and the head When the stand 160 retreats, the springs 171a, 171
The head stand 160 can be moved backward without the load b.

Guide holes 18 are provided in the legs 164 and 165 of the head stand 160.
0,181 is formed. A shaft 182 erected on the chassis is inserted into the guide hole 180 , and a wheel 16 is inserted into the guide hole 181 .
8b is inserted. A retaining hole 183 is also formed in the n portion 164 . Further, a through hole 184 is formed in the leg portion 165, and a locking hook 185 is provided in this through hole 184.

One end of a tension spring 186 is connected to this locking pin 185. Further, a guide hole 950 is formed in the leg portion 165, and a sleeve 95, which is provided upright on the chassis, is provided in the guide hole 950.
1 is inserted. Further, one end of a tension spring 1B7, 188 is connected to the leg portion 165, 164.
87.188! The ends are fixed to the chassis. As a result, the head stand 160 is biased toward the forward direction H1 by the spring force of the springs 187 and 188.

With reference to FIG.
60 forward direction II. Direction perpendicular to F1.60. F2
and a moving piece 191 that can be displaced along.

The tape running T-te switching piece 190 may be movable around the pongee 37a of the gear 37, and the pongee 38m of the gear 38 is fixed to this tape running switching piece 190. Further, a guide protrusion 190afJf is provided on the lower surface of the downstream end of the tape running switching piece 190 in the forward direction H1. This protrusion 190a fits into an arc-shaped guide hole 192 formed in the chassis, and one end of a screw spring 193 is connected to a portion of this protrusion 190a that protrudes below the chassis. The other end is connected to a catch 194 formed on the underside of the chassis. An engagement tag 190C is formed at the upstream end of the tape running switching piece 190 in the head stand advancement direction H1.

The moving piece 191 has a lower notch t! Jr! Contact pieces 191a and 191b that function as followers that can come into contact with the semi-circular cam 104k are provided upright.

Contact pieces 191a, 191 that contact the lower notch gear 104
b is the 23rd cam so that the cam 104k can be driven smoothly.
As shown in Figure A, it extends above the center 104R of the cam 104. This prevents the cam 104k from being twisted and damaged when it comes into contact with the abutment piece 191a or the abutment piece 191b. This contact piece 191a
A through hole 191c is formed between , 191b, and the shaft 110, which is provided upright on the chassis, is inserted through this through hole 191c and through the insertion hole 1041 of the lower notch tooth $104. By rotating the lower notch tooth frl104, the cam 1
04k comes into contact with the contact piece 191a or 191b and moves in the moving direction F1. The moving piece 191 is driven and displaced in the F2 direction. By this movement of the moving piece 191, the tape running switching piece 190 is angularly displaced around the pongee 37m, and the three idler gears mesh with the gear 40a (see FIG. 6A), causing the left g
The A8 reel 40 is driven or the teeth ItL
41, and the right Is reel 42 is driven. In this manner, the tape running is switched in accordance with the rotation of the lower tooth 41104. The lower notch 11 wheel 104 is the notch 104a or the notch 10 during recording/reproduction.
4 is in a state facing the drive gear 33. Therefore, the drive of the lower notch gear 104 is stopped. In this state, when the end position of the magnetic tape is detected by a detection means (not shown), the electromagnetic plunger 102
is excited, thereby releasing the locked state of the lower notched gear 104 by the blocking member 123, and lower notched gear 1
04 meshes with the drive gear 33, thereby rotationally driving the lower notch gear 104, and as described above, the movable piece 191 is displaced by the action of the cam 104, and tape running is automatically switched. 3. When the moving piece 191 moves in the direction of arrow F1 as shown in FIG. 23B due to tape running switching, the holding member 167a fJ'p is
tS23 The pinch roller 166a and the capstan 174 are angularly displaced in the direction of the arrow in FIG.

Similarly, when the switching piece 191 moves in the opposite direction to the direction F1, the pinch roller 166b is slightly separated from the capstan 175 due to the movement of the inclined surface 650b. With such a configuration, smooth tape recording/playback can be achieved.

A head stand advancement/retraction driving member 200 is provided below the leg portion 165 of the head stand 160 .

An exploded perspective view of the vicinity of this drive member 200 is shown in FIG. This driving member 200 includes a first movable piece 201 and a t
The movable piece 201, which includes the rS2 movable piece 202 and the connection g203 that connects the movable pieces 201 and 202, has a driving protrusion 201a erected thereon, and a locking pin 201b is formed thereon. The other end of the tension spring 186 is connected to the lock 7 hook 201b.

The driving protrusion 201a is connected to the locking piece 2 of the leg portion 165 of the head stand.
Contact with 04. In addition, the movable piece 202 has a guide slot 202.
a is formed. The driving member 200 can be angularly displaced by a pongee 653 erected on the chassis that passes through the connecting portion 203 .

A protrusion 45m protruding from the lower surface of the notched gear 45 fits into the guide slot 202a, and this notched tooth! tt4
5, a blocking piece 45b is provided coaxially with the ring of the notched gear 45. This blocking piece 45b is engaged with the locking surface 204a of the locking piece 204. This locking piece 204 is swingable around $111205 which is installed upright on the chassis. Further, the other end of a tension spring 206, one end of which is fixed to the chassis, is connected to the locking piece 204, thereby biasing the tension spring 206 counterclockwise in the tJ%24 diagram.

This locking piece 204 is formed with a locking ffl 204 c into which a retaining portion 207b formed at the end of the drive shaft 207a of the electromagnetic plunger 207 is fitted.

Next, the forward and backward movement t1 of the head stand 160 will be explained. When the head stand is located at the extreme end position in the backward direction H2, the drive member 200 is located at the extreme end position along the backward direction H2, as shown in FIG. In this state, the notched gear 45 has its notched portion facing the heptad gear 44. Therefore, the notched gear 45 is loaded with the magnetic tape cassette 13 to which no driving force is transmitted, and the electromagnetic plunger 207 is excited while being lowered from the insertion-most position. As a result, the locking piece 204
is displaced clockwise in FIG. 25, and the locked state is released. At the same time, the notch tooth TIt45 is moved to the drive tooth 1 via the drive member 200 by the spring force of the bone 1B7.188.
1144, and rotational force is applied. Note that the electromagnetic plunger 207 is immediately magnetized 217, so that the locking piece 204 returns to its original state again. In this state, the notched gear 45 is rotationally driven in the counterclockwise direction in FIG. 25, and the drive member 200 is accordingly angularly displaced in the counterclockwise direction around the shaft 653. Along with this, the head stand 16
0 is displaced along the forward direction H1 as the driving member 200 is angularly displaced by the springs 187 and 188. In this way, the driving member 200 is in the locked state in the state shown in FIG. 26 in which the locking surface 204a of the locking piece 204 is locked again to the blocking piece 45b, and the forward movement of the head stand 160 is thereby stopped.

With the start of the forward motion of the head stand IGO, the RA portions of the torsion springs 171a and 17 lb (see FIG. 22) are pressed by the abutment piece 163a, and thereby the holding members 1137a and 167b are held against the capstan. 174
, 175. Then, when the head stand 160 reaches the extreme end position m1 in the forward direction H1, the magnetic tape is moved to the pinch roller 166a.

166b brings about a state in which they are pressed together. As a result, the tape 71 is recorded while the magnetic tape is in contact with the magnetic head 162, and the recording/reproducing operation of the magnetic tape is performed. When the recording/reproducing operation is stopped and an inoet (not shown) is operated to eject the magnetic tape cassette 13, the plunger 207 is energized again, so that the plunger 207 is turned off via the drive member 200 by the spring force of the spring 186. The missing gear 45 meshes with the drive tooth 1144 again and rotational force is applied. As a result, the drive member 200 is angularly displaced in the clockwise direction in FIG.
01a presses the locking surface 165a of the head stand 160, and moves the head stand 160 in the backward direction H2 against the spring force of the springs 187 and 188. In this way,
When the terminal position in the backward direction H2 is reached, the notched gear 45 is locked again by the locking piece 204, and the notched portion of the notched tooth 11145 is exposed to the W moving gear 44. Then, the rotational drive of the notch tooth 1'tt45 is stopped.

In such a forward/backward mechanism for the head stand 160, the spring force of the tension spring 186 for reliably meshing with the notched TFLL wheel 45 and all 45 teeth rtI44 is determined by the force of the tension spring 186 when the drive protrusion 201a is in contact with the locking surface 165a. (while the head pedestal is retracting or moving forward), there is no load on the rotation of the notched gear 45, and conventionally, the spring that meshes the notched tooth 11145 with the drive gear 44 is The problem of the prior art, which is a load when the platform is retracted, is solved.

27 and 28 are X for explaining the operation of the movable member 118. In FIG. Pt527, the locking pin 120 is
is locked, whereby the head stand 160 is in a locked state. When the head stand 160 moves along the forward direction H1, the movable member 118 is angularly displaced clockwise in FIG. When the head stand 160 reaches this position, as shown in FIG. 28, the movable member 118 is unlocked from the locking pin 120.

When the head stand IGO performs a backward movement, the movable member 118 is returned to its original state by the spring force of the torsion spring 121. With this structure, the load caused by the torsion spring 121 does not act on the driving force that drives the head stand 160 when the head stand is retracted, so that the load when the head stand is retracted can be reduced. Further, although conventionally a guide groove was formed in the movable member 118 for the locking pin 120 to take its place when the head stand retreated, there is no need to provide such a guide groove, and therefore, due to the conventional guide groove being formed. However, these problems are solved in examples y and a of the present invention, although operation has been made unstable due to , deformation, shape deformation, and dimensional defects.

FIG. 29 is a simplified plan view of a curved rock bottom tank (hereinafter referred to as APS rock structure), and Pt530 is an exploded perspective view of FIG. 29. The APSfi structure 250 includes a drive member 251 that drives the performance/fast-forward switching gear 35, a first movable piece 252, a second movable piece 253, and an electromagnet 36. The drive member 251 is rotated by the shaft 37m of the gear 37. freely supported.

The switching tooth 113 is provided at one end of the drive member 251.
5 is rotatably supported. The drive member 251 is connected to the 29th
It is biased clockwise in the figure. Further, a driving protrusion 256 is provided upright on this driving member 251 .

A retaining hole 257 into which the driving protrusion 256 fits is formed in the first movable piece 252 . Further, a retaining hole 258 is formed into which a driving protrusion 258& fixed to the chassis fits. Further, a driving protrusion 259 that fits into a retaining hole 183 formed in the leg portion 164 of the head stand 160 is provided on the first movable piece 252 . N section 16 of head stand 160
One end of a tension spring 260 is connected to the locking hook 164a of No. 4, and the fI! The end is connected to the locking pin 261 of the movable piece 252. Further, this movable piece 252 is connected to a movable piece 253 by a shaft 262,
The tension spring 260 is biased counterclockwise in the fjS30 diagram by the spring force of the tension spring 260.

An iron piece 263 is fixed to the movable piece 253. This iron piece 2
An electromagnet 36 is placed facing 63.

During the magnetic tape playback operation, the electromagnet 3G is demagnetized, and therefore the driving member 251 is moved by the spring force of the spring 255 to the switching tooth If! 35 is in mesh with the gear 29. As a result, rotational driving force is transmitted to the gear 35 from the seven-wheeled wheel 25m via the gear 27 and two gears.

During such an operation, when the fast-forwarding copper is suppressed, the electromagnetic plunger 207 is excited, thereby causing the head stand 160 to retreat along the H2 direction. This backward movement of the head stand 160 causes the driving member 251 to angularly displace around the wheel 37a in the counterclockwise direction in FIG. 29, as will be described later. As a result, the gear 35 separates from the eleventh wheel 29, and when the head stand 160 reaches the extreme end position in the backward direction H2, the tiIt 135 is in a neutral position in which it does not mesh with either the gear 25b or the gear 29.

Therefore, when the unrotated head stand 160 reaches the extreme end position in the retraction direction H2, the take-up reel 40.42 moves the protrusion 1000 (
ff131 and C/see Figure 22) is switch 5W4.
(see Figure 15), and this causes the switch S
W4 becomes ON state. This causes the electromagnet 36 to
In the N state, the iron piece 263 is magnetically attracted to the electromagnet 36.

Next, a detection means (not shown) detects that the electromagnet 36 is in the ON state, and thereby the electromagnetic planter 207 is turned ON again. With this, head stand 1
60 moves forward along the forward direction H1, and the magnetic head 162
reaches the fast-forward position where it lightly touches the magnetic tape. As will be described later, as the head stand 160 moves forward, the drive member 251 further angularly displaces around the pongee 37m in the counterclockwise direction in FIG. meshes with the gear 34 as shown in figure ff131.
is transmitted to the gear 35, so that the rotational driving force of the tooth Itt
35 is driven to rotate at high speed. As a result, the right take-up reel 40 or the left fIq take-up reel 42 is driven to rotate at a high speed, thereby achieving rapid forwarding.

When the beginning of the next song is detected during such a fast-forward operation, the electromagnet 36 is turned off, and as a result, the driving member 251 is angularly displaced clockwise in the Pt530 diagram around the sleeve 37m, as will be described later. This allows the second
Teeth shown in Figure 9! tL35 returns to the playing state in which it meshes with gear 29.

Next, the operation of the drive member 251 will be described in more detail with reference to FIG. 31A. In FIG. 31A (1), a playing state is shown, and in this FIG. 31A (1), the spring force of the spring 255 is Dl, and the spring force of the spring 260 is D1.
2, the distance between the spring 255 and the cypress 37a is 11, the distance between the drive protrusion 256 and the sleeve 37a is -2, the distance between the drive protrusion 256 and the drive protrusion 259 is 3,
In this Pt5318 (1), where the distance between the drive protrusion 259 and the spring 260 is -4, the drive protrusion 256 is the fulcrum, so the upward force D' and the downward force on the drive protrusion 256 are The force D2' is shown in the fjS1 equation and the second equation.

In the first and second equations, the force D1' and the force D2' satisfy the third equation.

DI'>D2'...(3
) Therefore Kaku! I! The lIg material 251 is biased clockwise around the sleeve 37a.

When the fast-forwarding copper is pressed and operated as described above in this state, the head stand 160 performs a backward movement, whereby the TRS1 movable piece 252 moves the drive protrusion 258a into the engagement hole 258 by the spring force of the spring 260. It comes into contact with the inner peripheral surface and stops. As a result, the driving member 251 is angularly displaced counterclockwise around the wheel 37a, and the gear 35 is positioned at the neutral position.

The action of force at such a head stand retracted position is caused by the third
This is shown in Figure 1A (2). In FIG. 31A (2), the distance between the drive protrusion 256 and the drive protrusion 258m is -6, and the distance between the drive protrusion 258a and the spring 260 is -6.
5, and the upward force of the driving protrusion 25G is D1'
and the downward force of the drive protrusion 256 is D2''. At this time, the drive protrusion 256 is in contact with the inner circumferential surface of the engagement hole 257, and the drive protrusion 258a is in contact with the inner circumference of the engagement hole 258. The drive protrusion 259 is in contact with the engagement hole 18.
The force relationship of the drive protrusion 256 in such a head stand retracted position where it does not abut on the inner circumferential surface of
It is shown in the fifth equation.

Further, the force D2' and the force D1' satisfy the sixth formula.

D2″〉D1′
(6) When the head 160 moves forward from the electromagnetic plunger locked state, the first movable piece 252 rotates clockwise about the pongee 262, thereby closing the engagement hole 183.
The inner circumferential surface of the engagement hole 2 contacts the drive protrusion 259, so that the engagement hole 2
57 presses the drive protrusion 25G. Therefore, the drive member 251 rotates counterclockwise and the tooth IT! 35 is tooth JfL
In this way, the circulation driving force of the flywheel 25bl is transmitted to the gear 35, and rapid forwarding is executed.

After Iflly A is completely ejected, the electromagnet 36 is turned off, and the head stand IGO moves further forward.
Move to the playing state position. At the same time, the second movable piece 25
The lock state of the sleeve 262 of No. 3 is released, and the driving member 251
All the locks are removed, and the playing state is restored by the above-mentioned equations 1 to 3. Now APS! ! I! +The work is completed.

Effects As described above, according to the present invention, one spring 125 can perform both the suction operation and the crimping operation of the magnetic tape cassette 13.
One bone 12 that can reduce the load at the upper FL rising completion position of the holders 14a and 14b.
5 is sufficient, and the number of parts can be reduced. In addition, when the holder 125 is raised and the holders 14a and 14b are finished being raised, the holders 14a and 14b are not affected by the spring force of the spring 125, and the load can be reduced.

[Brief explanation of the drawing]

Figure P141 shows a magnetic tape recording/reproducing device r! according to an embodiment of the present invention. 110, FIG. 2 is its front view, FIG. 3 is its back view, FIG. 4 is its right side view, FIG. 5 is its left side view, FIG. 6 is its bottom view, and the ptSGA diagram is Tape deck 10's drive! ! 11%, FIG. 7 is an exploded perspective view of the gripping members 16a, 16b and related parts, rjS8 is a simplified plan view of the vicinity of the gripping members 16a, 16b, and FIG. Cutting plane line I in Figure 8! - A cross-sectional view as seen from [ is ζ], Fig. 10 is a cross-sectional view taken along the section line X-X of Fig. 8, and Fig. 11 is a cross-sectional view taken along the section line
12 is a diagram for explaining the operation of the gripping members 16a, 16b when inserting/ejecting the magnetic tape force set 13, and FIG. 13 is a sectional view of the gripping members 16a, 16b.
Fig. 14 is a plan view of the magnetic tape cassette being held in the elevator, and Figs. The exploded perspective view, Figure 17, shows the upper notch (Ill
FIG. 18 is a perspective view showing the bottom of the tunnel 103, and FIG. Diagram showing a simplified structure, mlaA
The figure is a diagram for explaining the relationship between the cam 112 and the follower 133d, and the figure ff118B shows the cam 500 and the blocking member 123.
Figure 11R19 and 2nd diagram to explain the relationship between
20A is a plan view showing the arrangement of the drive member 137 and the moving member 146, and FIG.
21 is a side view showing the configuration of the surrounding area, and FIG.
2 is an exploded perspective view of the head stand 160 and its related components, FIG. 23 is an exploded perspective view of the vicinity of the tape run switching bracket 161, and FIG. 23A is an operation of the moving piece 191 and the lower notch gear 104. 23B is a plan view showing the configuration near the moving piece 191, FIG. 24 is an exploded perspective view near the drive member 200, PIS 25 view, and ? tS
Figure 2G is a simplified plan view showing the operating state of the VI structure near the drive member 200, PIS 27 Figure 28 is a diagram for explaining the operation of the movable member 118, and Figure 29 is an AP diagram.
FIG. 30 is a simplified plan view of the S machine groove, FIG. 30 is an exploded perspective view of FIG.
P.S. 8! Diagram for explaining the operation of $4, No. 32
The figure shows a typical prior art. 10...Tape deck, 11a3, 11b3.7
? . 78... Guide hole, 13... Magnetic tape cassette, 1
3a ”・Protrusion, 14a, 14b-Holder, 16a, 1
6b - Gripping member, 17, 133, 137, 200, 2
51... Drive member, 21... Actuation lever, 23...
・Motor, 25 a, 25 b-7 Rye wheel, 27
,28,29,30.34,35,37,40,41,
42.43... Gear, 33.44... Drive gear,
39...Fidler gear, 45.103.104...
Notched gear, 52.52b...holding claw, 57,125
,155,186,187,188.206,255,
260... tension spring, 58,581+, 79...
Guide shaft, 61. G2... Guide piece, 63, 64... Guide groove, 88, 111, 117, 121. 171a, 17
1b, 193... Torsion spring, 90... Actuator, 91a, 9 lb-retaining pin, 102.207.
... Denji Plant Tsuya, 104, 112,500 ・
...Cam, 113...First cam surface, 114...tj
S2 cam surface, 115... Third cam surface, 118... Engaging piece, 123... Blocking member, 123i, 123h...
・Guide projection, 124° 14 G...Moving member, 13
3b, 137a, 137b, 138s201a, 256
+258a-259... Drive protrusion, 133d... Follower, 148... Lifting lever, 152.183,2
57,258.400...Engagement hole, 152a, 40
0m--contact surface, 153--biasing member, 160--head stand, 161--tape running switching rR structure, 162
...Magnetic head, 1I36a, 166b...Pinch roller, 167a, 167b-holding piece, 174.175
...Capstan, 190...Tape running switching piece, 191-...Movable piece, 191a, 19 lb.=Abutment piece, 252.253...Movable piece, 680...Printed circuit board, 681.・・7 Lexiple board, A1...
Insertion direction, A2... Ejection direction, El... Ascending direction,
F2...Descent direction, Fl, F2...Movement direction, F3
...Biasing direction by the spring 155 of the biasing member 153, H
l...forward direction, H2...reverse direction, SWI...
Limit switch agent Patent attorney Number of strokes Keiichi Figure 6A Figure 7 Figure 8 Figure 9 Figure 140 14a Figure 10 Figure 11 Figure 12 Figure 13 Figure 17 Figure 18 Figure 18A Figure 18B Figure Figure 19 Figure 20 Figure 20A! ff2OB figure 23A figure 23B figure 25 figure 26 figure 07a '207b figure 31A

Claims (1)

[Claims] Holders 14a and 14b that are movable between a first position where the magnetic tape cassette 13 is held and inserted/ejected, and a second position where the magnetic tape cassette 13 is moved.
and, provided in relation to the holders 14a and 14b, and one-way F1
a spring 12 that biases the moving member 124 in the moving direction F1;
5, a follower 133d related to the moving member 124, and a follower 1
33d, and has a cam surface 112a that drives the spring 12.
The follower 133d is brought into contact with the cam surface 112a by the spring force of the spring 125, except when the holders 14a and 14 are at least in the second position.
A magnetic tape cassette characterized in that the follower 133d is separated from the cam surface 112a when 4a and 14b are in the second position and are supported in contact with the fixed position. Lifting device.