JPH0411248Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention is applicable to car stereos and portable devices, for example.
This relates to the tape cassette loading and ejecting mechanism of small tape players used in VTRs and the like.

(b) Prior Art Conventionally, there has been known a slot-in type tape cassette loading/ejecting mechanism in which a tape cassette inserted from a tape cassette insertion slot is pulled in and then moved in the direction of its thickness to be in a playing state.

However, in such devices, in order to move the cage-like member that directly holds the inserted tape cassette between the retracted position and the play position, the cage-like member is swingable at the tip of the lifting arm. However, since the sides of the cage-shaped member cannot be pivoted because the head etc. come into contact with them, this pivot-supporting part protrudes from the top surface of the cage-shaped member, and the thickness direction of the entire device is reduced. This was a factor in making it bigger.

In addition, at least a support shaft is required for pivoting, which has the disadvantage that the number of parts increases and the number of assembly steps increases accordingly.

(c) Problems to be solved by the invention The purpose of this invention is to improve the above-mentioned drawbacks of the conventional device. To provide a tape cassette loading/ejecting mechanism for a tape player which is equipped with a support part that is easy to assemble.

(d) Means for Solving the Problems In order to achieve the above object, the tape cassette loading/ejecting mechanism of the tape player of this invention has a structure in which the top plate of the basket-shaped member is folded upward on both sides in the width direction. A bent part is formed, and an engaging groove is provided that extends from the top plate to the bent part, and L-shaped engaging protrusions that protrude outward on both sides of the tip of the lifting arm are connected to the engaging groove of the cage-shaped member. engage each other,
When the elevating arm rotates to the play position, the engagement protrusion is inclined within the engagement groove.

(E) Effect By doing this, the dimensions of the bent portion protruding from the top surface of the cage-shaped member can be made extremely small, and no other parts are required to assemble the supporting part, making the assembly easier. This is extremely simple because it is sufficient to simply insert the engaging protrusion of the lifting arm into the engaging groove of the cage-like member.

(F) Embodiment An embodiment in which this invention is applied to a car stereo will be described with reference to the drawings.

FIG. 1 is a plan view showing the entire device, and FIG. 1A shows the tape cassette in the inserted state (and ejected state), and FIG. 1B shows the tape cassette in the retracted state.

FIG. 2 is a left-hand side view of the tape cassette, and FIG. 2A and B correspond to FIGS. 1A and 1B, and FIG.

The tape player is configured as an auto-reverse type, with a tape cassette loading/ejecting mechanism,
It is equipped with a head extension and direction switching mechanism, an FF/REW mechanism, etc., and also includes a main motor MM, a first sub-motor SM1, and a second sub-motor SM2 for driving these mechanisms.

The configuration and operation of these mechanisms will be sequentially explained below.

<Tape cassette loading/ejecting mechanism> The tape cassette insertion slot into which the tape cassette 1 is inserted and ejected is located at the front (lower side in Figure 1, second
A cage-like member 2 that directly holds the inserted tape cassette 1 is attached to the lifting arm 4 (on the right side in the figure).
It is swingably supported at the tip of the

The cassette sliding member 3 is slidably engaged with a long groove 2a formed in the top plate of the cage member 2, and moves between the squid insertion position and the retraction position to pull in and push out the tape cassette 1. Let's do it.

The lifting arm 4 has its base end pivoted to the chassis 4.
a, and the cage member 2 is lowered and raised between the retracted position and the play position.

The width of the bottom plate of the cage member 2 gradually becomes narrower toward the tape cassette insertion opening, and a downwardly inclined projecting piece 2b is provided at the tip thereof.

Therefore, even if the tape cassette 1 is inserted into the tape cassette insertion slot in a slightly twisted state,
It is guided by the protrusion piece 2b and the part that gradually becomes wider in succession thereto, and is surely inserted into the cage-shaped member 2.

The protruding piece 2b may be provided near the center of the tape cassette insertion opening as shown in FIG. 1, or may be provided at the left or right end of the tape cassette insertion opening.

As shown in FIG. 3, the cassette sliding member 3
is a shaft 3a with a flange protruding from its upper side.
A long groove 2a formed in the top plate of the basket-like member 2 by
A metal cylindrical roller 3b is inserted between the shaft portion of the flanged shaft 3a and the wall of the long groove 2a to prevent wear caused by sliding contact between metals.
However, an annular washer 3c made of synthetic resin is provided between the collar and the upper surface of the cage member 2.

As shown in FIG. 4, the cassette sliding member 3 is provided with an elastic engagement protrusion 3d in its central portion, and this engagement protrusion 3d engages with the reel shaft hole of the inserted tape cassette 1. Combine tape cassette 1
hold it lightly.

The cassette sliding member 3 has a rotating lever 5 that rotates horizontally in a slit 3e formed at its rear end.
A long pin 5a at the tip of the tape cassette 1 is engaged with the tape cassette 1, and the tape cassette 1 is moved back and forth by the rotation of the rotating lever 5, thereby pulling in the inserted tape cassette 1 and pushing it out when ejecting the tape cassette 1.

As shown in the exploded perspective view of FIG. 5, the rotating lever 5 is coupled to the first cam lever 6 via a torsion spring 5b, and when the torsion spring 5b is deflected, only the rotating lever 5 moves slightly backward. It is designed to be able to rotate.

As a result, as shown in FIG. 4, when the tape cassette 1 is manually inserted from the tape cassette insertion slot, the torsion spring 5b is
Due to the deflection, the cassette sliding member 3 moves back a little, and its operating piece 3f rotates the switch lever 7 and starts the main motor M.

The torsion spring 5b is relatively loosely wound, its free length is several percent longer than the interval between the torsion spring mounting portions at the base end of the rotary lever 5, and is mounted in a compressed state.

Due to this configuration, the torsion spring 5b is difficult to tilt, and even if it tilts and contacts the support shaft, the contact force is weak, so there is a risk that the support shaft will be scraped over a long period of time and metal powder will scatter. There is no need to interpose a spacer between the torsion spring and the support shaft to prevent contact, as in conventional devices.

A driving pin 9a protruding from the carrier 9 is engaged with the cam groove 6a of the first cam lever 6, so that when the carrier 9 rotates, the cassette sliding member 3 moves.

As shown in FIG. 6, upwardly bent portions 2c are formed at the left end of the top plate of the basket-shaped member 2 and at positions to the right of the center, and each bent portion 2c is extended from the top plate to the right side of the center. An L-shaped engagement groove 2d is formed.

L-shaped engaging protrusions 4b are provided on both sides of the distal end of the lifting arm 4, with their distal ends projecting outward, and as shown in FIG. 7, these engaging protrusions 4b
is engaged with the engagement groove 2d of the cage-shaped member 2.

The engagement protrusion 4b is formed in a so-called half-opened shape,
Since it is slightly lower than the lifting arm 4, the head of the bent portion 2c does not protrude from the top of the device, which is extremely effective in car stereos where it is desired to reduce the thickness of the tape player as much as possible.

When the lifting arm 4 rotates and moves to the play position as shown in FIG.
It is inclined within the engagement groove 2d.

The length of the left engagement groove 2d is the length of the left engagement protrusion 4.
The cage member 2 is slightly longer than the length in the width direction of the distal end of the member b, and the cage member 2 is urged toward the right side when viewed from the front with respect to the lifting arm 4, thereby causing the engagement protrusion 4b to move into the engagement groove. This prevents it from falling off from 2d.

To assemble the cage member 2 and the lifting arm 4, first, engage the right engagement protrusion 4b with the engagement groove 2d, then engage the left side, and then push the cage member 2 to the right. , it is extremely simple.

As shown in FIG. 8, a spring 4c is provided between the tip of the lifting arm 4 and the side wall of the chassis. Press the tip (that is, the cage member 2) downward.

When the lifting arm 4 is in the retracted position in FIG.
The second
The cage member 2 is held in the raised position by the biasing force of the spring 4d.

As shown in the figure B, the second cam lever 8
When the engaging end of the cam lever 8 is retracted, the lifting arm 4 moves the pivoting cage member 2 clockwise in the figure to the play position, and the second cam lever 8 is further retracted and separated from the spring 4d.

As shown in FIGS. 1, 2, and 8, a long leaf spring 4e is protruded from the tip of the lifting arm 4, and its tip abuts against the top plate of the cage-like member 2.
In the states shown in FIG. 2C and FIG. 8B, rotational force is applied in the clockwise direction.

The purpose is that the engagement groove 2d of the cage member 2 is located forward of the center of gravity of the cage member 2 when the cassette is retracted (because the amount of rotation of the lifting arm 4 cannot be increased). This is to prevent the cage member 2 from tilting counterclockwise due to gravity during movement between the retracted position and the play position.

First cam lever 6 and second cam lever 8
are both drive pins 9a protruding from the carrier 9.
Driven by.

Since the shapes of the cam grooves 6a and 8a are as shown in FIGS. 9A and 9B, respectively, when the carrier 9 rotates clockwise as shown by the dotted line, the first cam lever 6 rotates counterclockwise, and the final slight rotation causes the second
The cam lever 8 rotates clockwise.

While the first cam lever 6 is initially rotating,
The second cam lever 8 does not rotate, and when the second cam lever 8 finally rotates, the first cam lever 6 does not rotate.

That is, the cassette sliding member 3 is first moved backward to move the inserted tape cassette 1 to the retracted position, and then the lifting arm 4 is rotated to lower the tape cassette 1 to the play position.

At the time of ejection, the carrier 9 rotates in the opposite direction and ejects the tape cassette following a completely opposite process.

<Drive Mechanism> FIG. 10 schematically shows the drive mechanism.

The forward side flywheel 10 and the reverse side flywheel 11 are driven by the main motor MM via the main belt, and either one of the reel stands 14 and 15 is driven via the play idler gear 12 or 13 depending on the tape running direction. Rotationally driven.

gears 16 and 18 with loading torque limiters from the play idler gear 12 on the forward side;
A large gear 19a fixed coaxially with the sun gear 19 is driven through the sun gear 19.

The first sub-motor SM1 moves the rotary head out and switches the pinch roller and play idler gear.

The second sub motor SM2 allows FF/REEW
The idler gear 22 is switched.

FIG. 11 shows the loading torque limiter mechanism.

A large-diameter gear 1 is disposed between a small-diameter gear 18 and a friction disk 18a coaxially fixed to the small-diameter gear 18 with a space therebetween.
6 is rotatably supported, and an elastic curved spring member 17 having three legs as shown in FIG. is pressed against the friction disk 18a to frictionally engage the two.

By doing this, if the tape cassette loading/ejecting mechanism stops midway due to a failure or the like, the large diameter gear 16 and the friction disk 18a
There is no risk that the frictional engagement with the drive mechanism will be disengaged and an excessive load will be applied to the drive mechanism upstream of the drive mechanism.

FIG. 12 shows a planetary gear mechanism which is the drive mechanism of the tape cassette loading/ejecting mechanism.

A planetary gear 20 meshes with a sun gear 19 coaxially fixed with a large-diameter gear 19a.
0 meshes with a partially toothed internal tooth sun gear 21 that is provided on the chassis coaxially with the sun gear 19 and does not rotate.

The planetary gear 20 is supported by a carrier 9 coaxially supported with the sun gear 19, and the carrier 9 is frictionally engaged with the sun gear 19 with a weak force.

A drive pin 9a protruding from the carrier 9 serves as a first cam lever 6 for moving the cassette sliding member 3.
and engages with cam grooves 6a and 8a of the second cam lever 8 that rotates the lifting arm 4 (see FIG. 9).

To explain its operation, when the main motor MM rotates in the forward direction, the sun gear 19 and the planetary gears 20 rotate in the direction shown by the arrow.
Since the planetary gear 20 is meshed with the partially toothed internal sun gear 21, the carrier 9 rotates clockwise and reaches the position shown in FIG.
0 comes off from the partially toothed internal sun gear 21 and the carrier 9 stops.

In the meantime, the first and second cam levers 6 and 8 are rotated to draw in the tape cassette 1 and lower it to the play position.

Since the carrier 9 is frictionally engaged with the sun gear 19 with a weak force, if the main motor MM continues to rotate in the forward direction, it will stop at the position shown in FIG.

If the main motor MM rotates in the opposite direction, the carrier 9
rotates a little counterclockwise together with the sun gear 19, and the planetary gear 20 meshes with the partially toothed internal tooth sun gear 21. After that, the carrier 9 rotates in the opposite direction (counterclockwise) to when the tape cassette was inserted. When the motor continues to reach the position A in the figure, the switch lever 7 rotates and the main motor MM stops.

<Head extension and direction switching mechanism> As shown in FIG. 13, the head extension and direction switching mechanism is driven by a cam gear 23 that is rotated in the forward and reverse directions via a worm gear 220 by the first sub-motor SM1. Ru.

The cam gear 23 is disposed vertically on the right side of the first sub-motor SM1, and a pin 23a protruding from the left side of the cam gear 23 serves as a dogleg-shaped head rotating arm 2 for switching the direction of the rotating head 24.
engages with a long groove 25a provided in one arm of 5;
Furthermore, an end of a semicircular cam 23b protruding from the same side of the cam gear 23 is supported by a sliding lever 26 so as to be slidable in the front-rear direction (left-right direction in the figure).
It comes into contact with the cam ridge 26a of.

This figure shows a standby state for forward play or music search, and when the cam gear 23 rotates in the direction of the arrow, the head rotation arm 25 does not (substantially) rotate, and only the sliding lever 26 ( (in the figure) to the left to take out the head and move the pinch roller and play idler gear as described later.

Conversely, if the cam gear 23 rotates in the direction opposite to the arrow from the state shown in the figure, the head rotation arm 25 first rotates clockwise to reverse the rotation head 25, and then the anticircular cam 23b The sliding lever 26 is moved to the right by contacting the left side of the left end cam ridge 26a (in the same figure).

The moving position of the sliding lever 26 (that is, the rotational position of the cam gear 23) is different between play and music search, and the rotary head 24 is stopped just before the play position during music search.

FIG. 14 shows an anti-circular cam 23b of the cam gear 23.
This figure shows the state of contact between the cam ridge 26a of the sliding lever 26, and FIG.

In either state, the semicircular cam 23b
The tangential plane of the contact portion between the contact portion and the cam ridge 26a is shifted by a certain angle (for example, θ=20° to 50°) from the direction of the straight line connecting the contact portion and the center of the cam gear 23.

The reason for this is that the sliding lever 26
Since the stop position is controlled by detecting the rotational position of the cam gear 23, this is to prevent an error in the stop position of the cam gear 23 from directly appearing as an error in the stop position of the sliding lever 26.
That is, this is to reduce errors in the stop position, and thereby the accuracy of the stop position of the sliding lever 26 can be increased.

Furthermore, the positions of the abutting portions of the semicircular cam 23b and the cam ridges 26a are set to be different during the music search and during the play. The error in the stopping position can be adjusted independently.

A U-shaped engagement portion 25b is formed on the other arm of the head rotation arm 25, and as shown in FIG. 15 (right side view, reversed from FIG. The cam gear 24 engages with the engaging protrusion 24b of the sector gear 24a, and is switched to the forward side and the reverse side by rotation of the cam gear 23, respectively.

As shown in FIG. 16, the engaging protrusion 24b of the fan-shaped gear 24a has a tapered portion at its tip and engages with the U-shaped engaging portion 25b of the head rotating arm 25 only when the rotating head 24 is in the release position. engage,
As the rotating head 24 moves further forward (to the left in the figure), it separates from the U-shaped engaging portion 25b, and the gap therebetween gradually becomes larger.

As a result, when the head is taken out (because the cam gear 23 is rotating), the head rotation arm 25
This prevents the rotary head 24 from rotating inadvertently even if the head 24 rotates somewhat. Further, when the rotary head 24 moves from the play position to the release position, the engaging protrusion 24b reliably engages with the U-shaped engaging portion 25b of the head rotating arm.

Above the rotating head 24, there is an azimuth fixing plate 24 made of an elongated elastic member and having two holes at both ends.
1 is provided, and these two holes are provided with forward and reverse azimuth screws, 242 and 24.
3 are penetrated and their screw heads are bond-locked to the azimuth fixing plate 241.

The center portion of the azimuth fixing plate 241 is in contact with the head stand 24c, and acts as a lock for the azimuth screws 242 and 243 during azimuth adjustment, and serves as a substrate for bond-locking them after adjustment.

In addition, the azimuth fixing plate 241 and the head stand 24c
A washer 244 made of an elastic material such as rubber or plastic is provided between the two. By providing the washer 244, the azimuth fixing plate can be made of a thin, weak member or a member that has no elasticity at all.

In order to control the rotational position of the cam gear 23, an elastic contact 23c is provided on the right side of the cam gear 23 as shown in FIG. The contact 23c is in sliding contact with the metal pattern to generate a rotational position detection signal for the cam gear 23.

As shown in FIG. 18, the sliding lever 26 is provided with engaging recesses 26b at its front and rear (upper and lower in the figure), and rotating arms 27 and 28 are provided symmetrically at the front and rear of the rotating head 24, respectively. pin 27a
and 28a are engaged with the engagement recesses 26b, respectively, to rotate the rotation arms 27 and 28.

The rotating arms 27 and 28 rotate synchronously in the same direction, one of which moves the head, and the other moves the pinch roller and play idler gear on the forward or reverse side depending on the tape running direction. Let's do it.

The rear pivot arm 27 will be described since its construction and operation are completely symmetrical with respect to the pivot head 24.

As shown in FIG.
are the bent portion 27b that contacts the pinch spring 29b of the pinch holder 29, and the contact portion 3 of the lock arm 30.
0c and an arm 27d that comes into contact with the engaging piece 24d of the head stand 24c.

The pinch holder 29 is always urged counterclockwise by a spring (not shown) provided on the support shaft 29d. In addition, in the through hole 29a provided in the lower plate member of the pinch holder 29,
A pin 31a protruding from the idler arm 31 is inserted loosely.

A lock arm 30 is placed under the pinch holder 29.
and an idler arm 31 are arranged. The lock arm 30 is attached to a pinch holder 29 on the chassis.
The spring 30a is supported coaxially with the idler arm 29d, and includes a spring 30a that biases the idler arm 31 in a counterclockwise direction and a locking portion 30b that locks the idler arm 31 in the release position.

In the state shown in the figure, the idler arm 31 is at the release position with its hook portion 31b locked by the locking portion 30b of the lock arm 30, and its pin 3
1a is in contact with the left end of the through hole 29a of the pinch holder 29.

To explain the operation in the case of forward play, the sliding lever 26 moves rearward (upward in FIG. 18) and the rotating arm 27 rotates counterclockwise. The pinch holder 29 is rotated clockwise to press the pinch roller against the forward side capstan, and then the arm 2
7c pushes the abutting part 30c of the lock arm 30 and rotates it clockwise, whereby the locking part 30b comes off the hook part 31b and the idler arm 3
1 rotates counterclockwise (by the urging force of the spring 30a), and the play idler gear 12 meshes with the reel gear 14b.

At this time, the front rotating arm 28 also rotates counterclockwise in synchronization, and its arm 28d contacts the engaging piece 24d of the head stand to move the head stand 24c to the play position.

In addition, when transitioning from the play state to the release state, the sliding lever 26 moves forward, the rotating arm 27 rotates clockwise, and the lock arm 3
0 rotates counterclockwise, the idler arm 30 remains in the play position because it is biased by the spring 30a, the pinch holder 29 rotates counterclockwise, and the pinch roller first separates from the capstan. Next, pin 3 of idler arm 31
1a is pushed by the left end of the through hole 29a of the pinch holder 29, the idler arm 31 rotates clockwise, and the play idler gear 12 moves to the reel gear 14b.
The idler arm 31 separates from its hook portion 31b.
engages with the locking portion 30b of the lock arm 30 and is locked in the release position.

In this way, by shifting the timing of the operations of the pinch roller and the play idler gear, the tape will not shift when transitioning from the release state to the play state, so there is no risk of the beginning of the song being missed. Furthermore, when transitioning from the play state to the release state, slack in the tape can be taken up.

During reverse play, the rotating arms 27 and 28 rotate in a direction opposite to that during forward play and change their roles.

When performing a search search, use the sliding lever 26.
The amount of movement is slightly less, the rotary head 24 stops slightly before the play position, and the pinch roller and play idler do not reach the operating position.

FIG. 20 shows a sectional view of the torque switching mechanism provided below the reel stands 14 and 15.

Annular friction surfaces 14a and 14d are formed by fixing felt and artificial leather, respectively, on opposing surfaces of two discs coaxially provided on the reel stand 14, and between them, large and small diameter discs made of polyacetal resin are formed. reel gears 14b and 14c are rotatably supported.

Large diameter reel gear 14b and small diameter reel gear 1
4c, a coil spring 14e is provided to press the two reel gears against the upper and lower annular friction surfaces, each with an appropriate friction coefficient (for example, μ=
0.18 and μ=0.49).

The large diameter reel gear 14b is for playing, and the small diameter reel gear 14c is for FF/REW.

Incidentally, even if polyacetal inorganic additives are used instead of artificial leather as the annular friction surface 14d, substantially the same coefficient of friction can be obtained.

As shown in FIG. 21, a guide roller 33 having an outer diameter slightly larger than the outer diameter of the pivot support is rotatably provided at the upper end of the shaft that pivotally supports the front pinch holder 32. When the tape cassette is inserted, it is guided by the guide rollers 33 and is smoothly inserted into the cage member 2.

<FF/REW mechanism> As shown in Figures 22 and 23,
In the FF/REW operation, the second sub-motor SM2 rotates the switching gear 34 arranged vertically on the right side via the worm gear 230, rotates the L-shaped arm 35, and moves the FF/REW gear 22 to the forward side. Flywheel 10 and reel gear 14c
or between the reverse side flywheel 11
This is done by engaging the reel gear 15c and the reel gear 15c.

Elastic contacts and metal patterns as shown in FIGS. 17A and 17B are also provided on the right side of the switching gear 34 and the chassis wall facing it, and these contact in sliding contact to control the rotational position of the switching gear 34. It is designed to generate a detection signal for

The second sub-motor SM2 is attached to the corner of the chassis where the top plate and the vertical wall intersect by a single elastic auxiliary plate 36 without using any fixing means such as screws.

As shown in FIG. 24, the elastic auxiliary plate 36
consists of a flat plate portion having three cut and bent portions 36a, 36b, and 36c protruding alternately to different sides, and two bent portions 36d connected thereto.

The top plate of the chassis is provided with U-shaped grooves 37a and 38a into which the front and rear bearings of the sub-motor SM2 fit, respectively, as shown in FIG. Bent pieces 37 and 38 are formed.

At the upper end portions of the U-shaped grooves 37a and 38a on the opposite side from the vertical wall, there are claw portions 37b that protrude toward the vertical wall.
38b are formed respectively.

In addition, an elastic auxiliary plate 36 is provided on the vertical wall of the chassis.
Two engagement holes 39 are formed in which the cut and bent portions 36a and 36c engage.

Figure 26 shows the installation state, in which the front and rear bearings of the second sub-motor SM2 are
When the elastic auxiliary plate 36 is fitted into the letter-shaped grooves 37a and 38a and press-fitted into the gap between the sub motor SM2 and the vertical wall from above as shown in the same figure, the cut and bent portion 3
6a and 36c engage with the engagement hole 39 of the vertical wall, and the cut and bent portion 36b protruding on the opposite side presses the sub-motor SM2 in the direction of the arrow. Bent portion 36d and U-shaped groove claw portions 37b and 38
b and is firmly fixed.

Although the sub-motor SM2 will not come off even if the claws 37b and 38b of the U-shaped groove are not provided, the sub-motor SM2 will be more firmly fixed if they are provided.

If it becomes necessary to remove the sub motor SM2, cut and bend parts 36a and 36c of the elastic auxiliary plate.
The sub motor SM2 can be easily removed by pushing it strongly with the tip of a screwdriver, for example, to remove it from the engagement hole 39, and then pulling out the elastic auxiliary plate 36.

Such a mounting mechanism can be commonly used as long as the bottom and all four sides are defined by walls or locking parts and the mounting and removal can be performed only from above.

<Operation> The overall operation will be briefly explained.

When the tape cassette 1 is inserted from the front, the switch lever 7 is pressed and the main motor MM is activated to pull in the tape cassette and lower it to the play position.Then, the first sub motor SM1 operates to bring out the head and change the direction. Then, the main motor rotates in the forward direction, and the performance continues from the state where the previous performance ended (for example, from the beginning of the reverse play if the previous forward play ended).

Music search, tape reversal, FF, REW
When an operation button such as the above button is pressed, the first or second sub-motor is operated to perform a desired operation as appropriate.

When the eject button is pressed at the end of the tape playback or in the middle, the main motor rotates in the opposite direction, raises and pushes out the tape cassette, and stops all operations.

(g) Effects of the invention As explained above, the tape cassette loading/ejecting mechanism of the tape player of this invention has upwardly bent portions formed on both sides of the top plate of the cage-like member in the width direction. An engagement groove is provided that extends from the top plate to the bent portion, and L-shaped engagement protrusions that protrude outward on both sides of the tip of the lifting arm are respectively engaged with the engagement grooves of the cage-shaped member. By making the engaging protrusion tilt within the engaging groove when the tape player rotates to the play position, the thickness of the tape player can be reduced, the structure is simple, the number of parts is small, and assembly is extremely easy. It is something that can be done.

[Brief explanation of drawings]

Fig. 1... A plan view showing the tape cassette insertion state and the retracted state of an embodiment in which this invention is applied to a car stereo. Fig. 2... A left side view showing the tape cassette insertion state, the retracted state and the playback state. Fig. 3... A vertical sectional view of the support part of the cassette sliding member, Fig. 4... A plan view of the cassette sliding member, Fig. 5... Relationship between the rotating lever and cam lever that drive the cassette sliding member. Fig. 6...A perspective view showing the right support part of the cage member, Fig. 7...Left side view of the left support part of the cage member, Fig. 8...Illustration of the cage member. Left side view in retracted position and role play position, Figure 9...1
FIG. 10 is a plan view of the drive mechanism, FIG. 11 is a vertical sectional view of the loading torque limiter, and FIG. 12 is a plan view of its spring member. A plan view of the planetary gear mechanism, Fig. 13... A left side view of the head extraction and switching mechanism, Fig. 14... A left side view showing the engagement between the semicircular cam of the cam gear and the cam ridge of the sliding lever, Fig. 14... Figure 15... Right side view showing the engaged state of the head rotating arm and sector gear, Figure 16... Plan view of the rotating head, Figure 17... Right side view of the squid gear and left side of the side wall of the chassis facing it. figure,
Figure 18...A plan view of the sliding lever and two rotating arms, Figure 19...An exploded plan view showing the operation of the rear rotating arm, the pinch holder, and the lower idler arm, Figure 20...The torque switching mechanism Vertical sectional view, Fig. 21...Perspective view of guide roller, Fig. 22...Left side view of FF/REW drive mechanism, Fig. 23...
Fig. 24: A perspective view of the elastic auxiliary plate, Fig. 25: A perspective view of the second sub-motor installation part, Fig. 26: A plan view showing the FF/REW gear switching, Fig. 24: A perspective view of the elastic auxiliary plate, Fig. 26: A perspective view of the second sub-motor installed. Side view. 1...Tape cassette, 2...Cage-shaped member, 2
c...Bending portion, 2d...Engaging groove, 4...Elevating arm, 4b...Engaging protrusion.

Claims (1)

[Claims for Utility Model Registration] (1) Comprising a cage-like member that directly holds an inserted tape cassette, and an elevating arm whose base end is pivotally supported by a chassis and whose distal end swingably supports the cage-like member. In a slot-in type tape cassette loading/ejecting mechanism in which the cage-like member is parallel to the chassis at least in the cassette insertion position, retraction position, and play position, there are two tape cassettes on both sides of the top plate of the cage-like member in the width direction. The cage member has a bent portion facing upward, an engaging groove extending from the top plate to the bent portion, and L-shaped engaging protrusions protruding outward on both sides of the tip of the lifting arm. A tape cassette loading and ejecting mechanism for a tape player, characterized in that the engaging protrusions are respectively engaged with the engaging grooves of the tape player and the engaging protrusions are inclined within the engaging grooves when the elevating arm is rotated to the play position. (2) The length of one of the engagement grooves is longer than the length in the width direction of the tip of the engagement protrusion that engages with the engagement groove, and the cage-like member is biased toward the other engagement groove. A tape cassette loading/ejecting mechanism for a tape player according to claim 1, characterized in that: