JPS6037724Y2 - Cassette loading mechanism - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cassette loading mechanism that automates most of the cassette pack insertion operations.

In a cassette tape player used in a car stereo or the like, the cassette pack is normally inserted horizontally from the pack insertion slot, and when the pack is pushed in a predetermined stroke, it automatically lowers to a fully installed state (playing state).

Incidentally, the entire stroke of the above-described horizontal pushing operation of the cassette pack has conventionally been performed manually, that is, by the user pressing the rear end of the pack.

Therefore, there is a drawback that the operation feeling when inserting the pack is poor.

This is because the pack insertion does not simply apply the load of the pack body, but also energizes other mechanisms that are linked to the pack insertion operation.

Further, when the front surface area is reduced due to miniaturization of the player, a scale plate, a volume (particularly a sliding type), switches, etc. are arranged at the lower end of the pack insertion opening.

For this reason, the distance from the opening end of the pack insertion slot on the front of the player to the position where the pack insertion operation is actually completed is longer than the length and width of the pack body. It is necessary to press the rear end.

However, since the width of the pack insertion opening is usually about 13 mm, it is not preferable to insert the user's finger into the pack insertion opening.

In order to solve the above-mentioned drawbacks, the present invention aims to provide a cassette loading mechanism that automates most of the cassette pack insertion operations so that the user only needs to push the rear end of the pack slightly. .

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In the following explanation, mechanisms necessary for driving the cassette tape and the like are omitted.

FIG. 1 is a top view of the main body of the player with the ceiling plate removed. Reference numeral 11 indicates a chassis, and reference numerals 12 and 13 indicate side plates with both ends of the chassis 11 raised vertically.

A head stand 15 on which a magnetic head 14 is mounted is supported on the upper surface of the chassis 11 so as to be slidable back and forth.

Reference numerals 16 and 17 denote side plates with both ends of the head stand 15 raised vertically.

An operating lever 18 used for eject operation, etc. is attached to the front end of the head stand 15.

The head stand 15 is always subjected to elasticity forward, that is, in the direction of arrow A, by a compressible head stand advancement spring 19, 20 suspended between it and the chassis 11, and is biased forward in the playing state.

The state shown in FIG. 1 is at the time of ejection, and the head stand 15 is retreating against the elasticity of the springs 19, 20, that is, it is biased in the direction of the arrow.

Reference numerals 21 and 22 are conversion levers that move in the opposite direction to the head stand 15.

The conversion levers 21 and 22 have base end portions supported by the chassis 11 through shafts 23 and 24, and intersecting intermediate portions which are rotatably connected to each other via a fulcrum 25.

On the free end side of the conversion lever 21, 22, a locking pin 26, 27, which will be described later, is planted upward, and on the board side, there is an engaging part 28, 29 bent in a U-shape. It has become.

The retaining portions 28 and 29 include engagement pieces 28 a during ejection,
29 a and the engaging piece 28 a when inserting the pack, 29
A is provided.

The engaging pieces 28 at 29 a are the side plates 1 of the head stand 15.
The engagement pieces 28a, 29a are pushed in by the bent end portions 16a, 17a of the side plates 16, 17, and the engagement pieces 28a, 29a are pulled in by the protrusions 16b, 17b projecting downward from the side plates 16, 17.

In the above configuration, when the operating lever 18 is pushed in the direction of the arrow as shown in the figure and the head stand 15 is retreated, the side plate 16,
Since the bent portions 16a and 17a of 17 press the engagement pieces 28a and 29a of the conversion lever 21.22, the conversion lever 21
．． 22 rotates clockwise (counterclockwise) around shafts 23 and 24.

Therefore, the pins 26, 27 of the conversion lever 21, 22 move in the direction of arrow A, opposite to the head stand 15.

In this case, by setting the positions of the shafts 23 and 24 of the conversion levers 21 and 22, it is easy to make the moving distance of the pins 26 and 27 several times the moving distance of the head stand 15.

The head stand 15 in the illustrated state is locked in the retracted position (described later).

Then, when a cassette pack (not shown) is slightly inserted in the direction of the arrow, the lock is released, and the head stand 15 quickly moves forward in the direction of the arrow A by the elasticity of the springs 19 and 20.

At this time, the protrusions 1 on the lower ends of the side plates 16 and 17 of the head stand 15
6b, 17b are the engagement pieces 28b of the conversion lever 21.22,
29b, the conversion lever 21.22 is moved to the shaft 23,
24 in a counterclockwise (clockwise) direction, and then rotate pin 26.
27 retreats rapidly (see Figure 4).

In this embodiment, the cassette pack is automatically sucked in the direction of the arrow by the above-mentioned backward movement of the pins 26 and 27.

This interlocking mechanism will be explained with reference to FIG. This figure is a partially transparent plan view mainly showing the portion related to the ceiling plate located above in FIG. 1.

The ceiling plate 30 is fixed to the upper ends of the side plates 12 and 13 of the chassis 11, and has three deformable elongated holes 30a, 30b, and 30c.
has.

A modified cross-shaped sliding plate 32 in which a pin 31 is engaged with an elongated sliding hole 30a extending back and forth is slidably supported on the lower surface of the ceiling plate 30.

Elongated holes 32a, 32 extending left and right are provided in both wing parts of the sliding plate 32.
b is provided, where the conversion lever 21 shown in FIG.
．． 22 pins 26, 27 are slidably engaged.

A base end portion of a leaf spring 33 of the cassette back engaging portion is fixed to the upper surface of the body of the sliding plate 32 with a pin 31.

The head 33a of this leaf spring 33 bulges downward.

The sliding plate 32 is always subjected to elasticity in the direction of arrow A by contractile eject auxiliary springs 34 and 35 suspended between it and the ceiling plate 30.

Reference numerals 36 and 37 designate a pair of lock levers having a substantially symmetrical structure, which are pivotally supported by a fulcrum 38 so as to overlap the lower surface of the rear end of the body of the sliding plate 32.

The lock levers 36 and 37 are always elastically applied inward by a contractile spring 39, and the locking pins 40 and 41 installed on the upper surface of the central part are inserted into the long holes 30b and 30c of the ceiling plate 30.
It is in sliding contact with the inside of the

The state shown in the figure is the ejected state, and the pin 40°41
are engaged with the locking recesses 30d and 30e of the elongated holes 30b and 30c.

Arm portions 36a and 37a extending forward from both ends of the lock levers 36 and 37 respectively abut against a portion of the front end surface of the cassette link that is not the tape exposed portion.

When the pack is inserted, the arm portion 36at37a is pushed in the direction of the arrow at the front end of the pack, so that the lock lever 3
6°37 rotates clockwise (counterclockwise) against the elasticity of the spring 39, and as a result, the pins 40, 41 move into the recess 30 (L30).
The locked state is released by releasing e.

At this time, a force is applied to the pins 26, 27 of the conversion lever in the direction of the arrow by the forward movement springs 19, 20 of the head stand (Fig. 1) 15, so that the sliding plate 32, the lock lever 3
6, 37 and the leaf spring 33 are retracted integrally.

Here, by setting the head 33a of the leaf spring 33 to engage with the step on the front surface of the cassette pack before the locks of the pins 40 and 41 are released, the pack can also be pulled in integrally. be caught.

Conversely, when the operating lever 1B is pushed into the engagement position indicated by the arrow A, the pins 26 and 27 move forward towards the engagement indicated by the arrow A, contrary to the movement of the head stand 15, so the sliding plate 32 and the lock levers 36 and 37 are integrated. The arm portions 36a and 37a eject the pack in the direction of arrow A.

At the end of this eject operation, pin 40.4
1 is engaged in the illustrated state, the head stand 15 and the operating lever 18 are also held in the retracted position.

The pack mounting operation includes not only the above-mentioned horizontal movement of the pack but also the lowering movement, which will be explained with reference to the operation state diagrams of FIGS. 3 and 4.

FIG. 3 is a cross-sectional view taken along line XX in FIG. 2, and FIG. 3a shows the initial state of insertion of the cassette pack 42.

When the pack 42 is manually inserted from an insertion port (not shown) in the direction of the arrow, its front end surface 42a is aligned with the leaf spring 3.
It collides with the head 33a of No. 3.

When the pack 42 is further pushed in the same direction from this state, the head 33a of the leaf spring 33 temporarily escapes upward (to the dashed-dot line position) due to the elasticity of its body.

When the front end surface of the pack 42 presses the arm 36a of the lock lever 36 and rotates the lever 36 by a predetermined angle clockwise in FIG. The portion 33a engages with the rear portion of the high step portion 42b on the upper surface of the bag 42 in a press-contact state.

At this stage, pins 40 and 41 (Fig. 2) are connected to the ceiling plate 3.
Therefore, when the rear end of the pack 42 is pushed slightly in the direction of the arrow, the pins 40 and 41 are unlocked, and the pins 27 and 41 of the conversion lever (Fig. 1) are released. The slide plate 32, the leaf spring 33, and the lock levers 36, 37 move back together in conjunction with the sudden movement of the slide plate 32, the leaf spring 33, and the lock levers 36, 37 to move back together.

As a result, the pack 42 is hooked onto the head 33a of the leaf spring 33 and is automatically retracted to the final position in the direction of the arrow as shown in FIG. 3C.

Out of the entire stroke of the horizontal insertion operation of the pack 42 described above, only a small stroke from the position a to b in FIG. 3 requires manual operation by the user. resolved.

Puck 4 has reached its final horizontal position as shown in Figure 3C.
2 then descends in the direction of the arrow and enters the playing state, as shown by the dashed line in the figure.

This operation will be explained with reference to FIG. This figure is a sectional view taken along the X-Y line in FIG. 1, and only shows the side plate 12 of the chassis 11 and the side plate 16 of the head stand 15.
The opposite side has a similar structure.

A cam groove 43 is formed in the side plate 16 of the head stand 15.

This cam groove 43 has a cam part 43a for horizontal pack movement that is horizontal at the uppermost part, a cam part 43b for lifting and lowering the pack that slopes down from one end of this cam part 43a, and this cam part 4.
Cam part 43 for head advancement extending horizontally from the lower end of 3b
It consists of c.

On the other hand, the side plate 12 of the chassis 11 has three vertical sliding slots 44a and 44b.

44c is provided.

These elongated holes 44a, 44b, 44c have pins 4, respectively.
5a, 45b, and 45c are slidably fitted together.

Of these, the pin 45b is also slidably fitted into the cam groove 43.

These pins 45 a, 45 b, and 45 c are fixed to the pack holder 46 inside the side plate 16 of the head stand 15.

This holder 46 has a U-shaped cross section and guides the side end of the pack 42 (FIG. 3) between the upper piece 46a and the lower piece 46b.

The state in Figure 4a corresponds to Figure 3a, and the head stand 1
5 is biased in the direction of the arrow, the pin 45b is located at the front end of the cam portion 43a, and the holder 46 is raised in the two directions of the arrow.

The state of Fig. 4 corresponds to Fig. 3 C, and the head stand 1
5, the pin 45b is located at the rear end of the cam portion 43a.

Since the total length of the cam portion 43a corresponds to the entire insertion stroke of the pack 42 (including the transmission ratio of the conversion lever 21.22), the pin 41.
42 (FIG. 2) is unlocked.

When the head stand 15 further advances in the direction of arrow A, the pin 45
b is guided by the cam portion 43b and descends along the elongated hole 44b of the side plate 12.

Therefore, the holder 46 also descends in the direction of the arrow at the same time.

This state corresponds to the position shown by the dashed-dotted line in FIG. 3C.

At this time, the pins 45at 45bt 45c are connected to the elongated hole 4.
4a, 44b, 44c, the holder 4
6 moves in parallel and descends.

At this stage, the pack 42 is fitted onto a reel shaft (not shown).

After this, the head stand 15 further moves forward in the direction of arrow A.

During this movement process, the pin 45b relatively slides within the cam portion 43c, so the holder 46 does not change its position.

Then, the head 14 shown in FIG. 1 moves forward in accordance with the movement of the head stand 15 and comes into pressure contact with the tape exposed from the front end surface of the back 42.

Incidentally, all the ejecting operations are performed in the reverse process to the above.

With the cassette loading mechanism of the present invention as described above, it is only necessary to push the cassette pack slightly, so switches etc. are placed at the lower end of the front insertion opening of a cassette tape player used in a car stereo etc. Even when the distance from the mouth opening end face to the pack mounting position is long, manual operation of inserting a finger into the insertion opening and pushing in the rear end of the pack is necessary.

In addition, when manually operating the pack when inserting the pack, the load suddenly becomes negative (sucked in) after the lock is released, so the operating feeling is improved.

[Brief explanation of drawings]

Figures 1 to 4 are diagrams showing one embodiment of the present invention.
The figure is a top view with the ceiling plate removed, Figure 2 is a top view mainly showing the ceiling plate part, Figures 3a to C are cross-sectional diagrams of each operation state taken along line X-X in Figure 2, and Figure 4a ~d are Y in Figure 1
It is each operation state diagram taken as a cross section along -Y. 11... Chassis, 12, 13... Side plate, 14... Magnetic head, 15... Head stand, 16, 17... Side plate , 18...
・Operation lever, 19, 20... Head stand forward spring, 21, 22... Conversion lever, 26.27.
...Pin, 28, 29...Engagement part, 30.
...Ceiling board, 30 d, 30 e...
Lock recess, 32...Sliding plate, 33...
...Plate spring, 34, 35...Eject auxiliary spring, 36.37...Lock lever 136a, 3
7a...Arm portion, 39...Spring, 40,
41...Lock pin, 42...Cassette pack, 43...Cam groove, 44a to 44c
・・・・・・Elongated hole, 45a~45c・・・Pin,
46...Pack holder.

Claims (1)

[Scope of utility model registration request] A head stand for mounting a magnetic head that is provided on the top surface of the chassis so as to be slidable back and forth, a head stand advancement spring that biases the head stand forward, and a head stand that rotates in conjunction with the head stand and moves toward its free end side. A conversion lever that moves the provided engagement pin in the opposite direction to the head stand, a ceiling plate attached to the side plate at the end of the chassis above the head stand, and a lever that slides back and forth on the underside of the ceiling plate. A sliding plate that is movably provided and has an elongated hole that engages with a pin of the conversion lever, and a pin that is pivotally supported by the sliding plate and that engages with a locking recess provided in the ceiling plate. The cassette pack is equipped with a lock lever and an eject auxiliary lever that biases the sliding plate forward. When released by inserting the part,
A cassette mounting mechanism characterized in that the cassette pack is configured to move backward by indirectly receiving the elasticity of the head platform advance spring while the high stage portion is pressed by the plate spring.