JPH0422425Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention is designed to elastically press a cassette holder in two positions, ie, a cassette insertion position and a cassette mounting position, in a front loading type recording/reproducing apparatus, for example. This invention relates to a cassette loading device.

[Summary of the invention] This invention allows the cassette holder to be reciprocated from the cassette insertion position to the cassette attachment position by means of a relatively rotatable drive gear and rotation arm along the guide groove of the holder support plate. In a cassette loading device configured to allow
A storage section for storing a limiter spring is provided on the side surface of the drive gear, and first and second protrusions are provided that abut on both sides of the limiter spring, and both inner surfaces intersecting the sliding direction are provided at a predetermined distance from the outer surface of the storage section. By fitting the long-separated slider into the storage part, and providing first and second pressing parts on the side surface of the rotating arm facing the drive gear that abut both outer surfaces intersecting the sliding direction of the slider, The cassette can be elastically pressed to the cassette insertion position and the cassette attachment position, the cassette holder can also function as a buffer when stopping the cassette holder at the cassette insertion position, and the structure can be simplified.

[Conventional technology]

Conventionally, in a cassette loading device for a recording/playback device, such as a video tape recorder (VTR),
When the cassette loading mechanism reciprocates the cassette holder between the cassette insertion position where the cassette is inserted and the cassette loading position where the cassette tape is recorded or played back, the one-way limiter spring moves the cassette to the cassette loading position. (on the cassette positioning pin).

In such a cassette loading device, when the cassette holder moves back from the cassette loading position to the cassette insertion position, the one-way limiter spring does not work at all, so the guide roller of the cassette holder does not close to the edge of the guide groove provided on the holder support plate. It collides with a section and stops. Therefore, there is a problem that the gears of the cassette loading mechanism are likely to become locked.

Therefore, if a limiter spring in the other direction is provided to buffer the impact when the guide roller comes into contact with the end of the guide groove and stops when the cassette holder moves back to the cassette insertion position, the cassette loading mechanism The lock that causes the gears to engage will no longer occur.

However, if a one-way limiter spring and a second-way limiter spring are installed symmetrically on the opposite side of the drive arm, and the two limiter springs simply suspend the rotary arm at a neutral position in the forward and reverse rotational directions of the drive gear, When the rotating arm is rotated in forward and reverse directions via the drive gear, vibrations are generated in the rotating arm due to the two limiter springs. Therefore, the cassette holder vibrates due to the vibration of the rotating arm, making it impossible to smoothly reciprocate the cassette holder along the guide groove. Another problem is that the number of assembly steps increases.

Therefore, the present applicant proposed a cassette loading device (Utility Application No. 150508/1986) to solve the above-mentioned problems.
was proposed first. This cassette mounting device will be explained below with reference to FIGS. 5 and 6.

In these figures, 1 indicates a holder support plate, and L-shaped guide grooves 2A, 2B, and 2C are provided therein.

Reference numeral 3 indicates a cassette holder, and guide pins 4A, 4B, and 4C located in guide grooves 2A to 2C of a pair of holder support plates 1 are implanted on the side surface of the cassette holder.
Guide rollers 5A, 5B, 5 loosely fitted into A to 2C
C is rotatably attached.

Reference numeral 6 indicates a rotation center shaft installed in the holder support plate 1, and a pair of rotation arms 7, 8 and a drive gear 12 are attached so as to be relatively rotatable. The guide roller 5B of the cassette holder 3 is loosely fitted into the opposing surfaces 7A, 8A of the pair of rotating arms 7, 8, and the limiter spring 11 is fitted into the locking portions 9, 10 provided on the rotating arms 7, 8. It is strung up. Therefore, the limiter spring 11
A and 8A urge the rotating arms 7 and 8 to sandwich the guide roller 5B. And drive gear 1
A drive pin 13 is provided at an eccentric position of 2,
This drive pin 13 is located between the opposing surfaces 7A and 8B of the pair of rotating arms 7 and 8.

Reference numeral 14 denotes a transmission gear that meshes with the drive gear 13, and an interlocking rotation shaft 15 is pivotally supported by the holder support plate 1.

The cassette loading device configured as above is
As can be understood from FIG. 6, since the drive pin 13 of the drive gear 12 presses the rotating arm 7,
The rotating arm 8 elastically presses the guide roller 5B against the one end 2a of the guide groove 2B of the holder support plate 1 by the urging force generated by the extension of the limiter spring 11.

Therefore, when the cassette holder 3 moves back from the cassette mounting position to the cassette insertion position, the gears of the cassette loading mechanism are engaged by the action of the limiter spring 11 and are no longer locked, and when the cassette holder stops, It can also act as a buffer.

When the drive gear 12 rotates clockwise to move the cassette holder 3 from the cassette insertion position to the cassette mounting position, the guide roller 5B
After colliding with the other end 2b of the guide groove 2B of the holder support plate 1, the drive pin 13 rotates the rotating arm 8 by a predetermined angle, so that the rotating arm 7 is guided by the biasing force of the limiter spring 11 extended. Press the roller 5B. Therefore, the cassette holder 3 is elastically pressed to the cassette mounting position by the action of the limiter spring 11.

[Problem that the invention attempts to solve]

However, in order to speed up the response of the cassette loading mechanism, the distance between the opposing surfaces 7A and 8A of the pair of rotating arms 7 and 8 is made approximately equal to the diameters of the guide roller 5B and the drive pin 13.
B. When the rattling of the drive pin 13 is eliminated, the pair of rotating arms 7 and 8 are biased to sandwich the guide roller 5B and the drive pin 13 by the limiter spring 11, so the guide roller 5B and the drive pin 13
is tightened by the rotating arms 7 and 8.

Therefore, there is a problem in that the biasing force of the limiter spring 11 increases the load on the drive motor of the cassette loading mechanism.

This invention provides a cassette mounting device that solves the above-mentioned problems.

[Means for solving problems]

The cassette mounting device of this invention is provided with a storage section for loading a limiter spring on the side surface of the drive gear, first and second protrusions that abut on both ends of the limiter spring, and a cassette mounting device on both inner surfaces intersecting the sliding direction. a slider which is spaced a predetermined distance from the outer surface of the storage section, is mounted on the storage section, and a first and a second first and second slider are mounted on the side surface of the rotary arm facing the drive gear and abut against both outer surfaces intersecting the sliding direction of the slider. The configuration includes a pressing portion.

[Effect]

In the cassette loading device of this invention, when the cassette holder moves to the cassette insertion position and the cassette loading position,
Since the pressing portion presses the limiter spring via the first and second protrusions of the slider, the cassette holder can be elastically pressed to that position by the biasing force of the limiter spring.

〔Example〕

FIG. 1 is an exploded perspective view showing the main parts of a cassette loading device which is an embodiment of this invention, and FIGS.
The same reference numerals as in the figure indicate the same parts.

In FIG. 1, reference numeral 21 denotes a rotating arm rotatably supported by the rotation center shaft 6, and a long hole 22 into which the guide roller 5B of the cassette holder 3 is loosely fitted, and a first and a second rotating arm. Pressing portions 23A and 23B are provided. The interval d between the elongated holes 22 is approximately the same as the diameter of the guide roller 5B, so that the guide roller 5B does not wobble.

Reference numeral 24 indicates a drive gear which is pivotally supported by the rotational center shaft 6, and a storage portion 25 in which a limiter spring 26 is loaded is provided.

A slider 27 is provided with first and second protrusions 28A and 28B that abut against both ends of the limiter spring 26, and when the slider 27 is mounted on the storage portion 25, the slider 27 crosses the sliding direction of the slider 27. Both outer surfaces 25O ₁ and 25O ₂ of the storage portion 25 and both inner surfaces 27I ₁ and 27I ₂ of the slider 27 are spaced apart from each other. Then, the first and second pressing portions 23A and 23B of the rotating arm 21 come into contact with both outer surfaces 27O ₁ and 27O ₂ of the slider 27, which intersect with the sliding direction.

In the cassette loading device of this invention constructed as described above, when the cassette holder 3 is in the cassette insertion position shown in FIG.
B abuts one end 2a of the guide groove 2B of the holder support plate 1. Then, the storage section 2 of the drive gear 24
Since the limiter spring 26 loaded in the slider 27 is biased to press the first protrusion 28A of the slider 27, the outer surface _25O1 of the storage portion 25 and the slider 2
The inner surface 27I ₁ of 7 is close to each other, and the outer surface 25O ₂ and the inner surface 27I ₂ are separated. Therefore, the biasing force of the limiter spring 26 can elastically press the cassette holder 3 to the cassette insertion position.

When the cassette C is inserted into the cassette holder 3 in this state as shown by the one-dot chain line, the cassette insertion detection switch (not shown) provided on the cassette holder 3 is activated and the drive motor of the cassette loading mechanism (not shown) is activated. rotates in the normal direction and rotates the drive gear 24 clockwise via the transmission gear 14, so first, only the drive gear 24 rotates clockwise. Then, when the biasing force of the limiter spring _{26 is} released, that _{is ,} as shown in FIG. It rotates clockwise together with the gear 24.

Therefore, the guide roller 5B is pressed rightward, and the guide rollers 5A to 5C are pressed against the holder support plate 1.
By moving along the guide grooves 2A to 2C, the cassette holder 3 moves horizontally and then descends, moving from the cassette insertion position to the cassette mounting position.

When the drive gear 24 rotates further and the cassette holder 3 reaches the cassette mounting position as shown in FIG. 26 presses the second protrusion 28b of the slider 27, so that the outer surface 2 of the storage portion 25
5O ₁ and the inner surface 27I ₁ of the slider 27 are close to each other,
The outer surface 25O ₂ and the inner surface 27I ₂ become separated and the drive motor stops. Therefore, the biasing force of the limiter spring 26 can elastically press the cassette holder 3 to the cassette mounting position.

Next, when ejecting the cassette C after recording or playback is completed, the drive motor is reversed by operating an eject button (not shown), and the drive gear 24 is moved counterclockwise via the transmission gear 14. Since it is rotated, first, only the drive gear 24 is rotated counterclockwise. Then, the biasing force of the limiter spring 26 is released, and the outer surface 2 of the storage portion 25
5O ₁ , 25O ₂ and the inner surface 27I ₁ of the slider 27,
When 27I ₂ and 2 are approximately the same distance apart, the rotating arm 2
1 also rotates counterclockwise together with the drive gear 24,
The cassette holder 3 rotates from the cassette mounting position to the cassette insertion position.

When the drive gear 24 rotates further and the cassette holder 3 reaches the cassette insertion position as shown in FIG.
6 to press the first protrusion 28A of the slider 27, the outer surface 25 of the storage portion 25
O ₁ and the inner surface 27I ₁ of the slider 27 become close to each other, and the outer surface 25O ₂ and the inner surface 27I ₂ become separated, and the drive motor stops. Therefore, the biasing force of the limiter spring 26 can elastically press the cassette holder 3 to the cassette insertion position. When the cassette holder 3 reaches the cassette insertion position, the cassette C is ejected from the cassette holder 3 as shown by the two-dot chain line (FIG. 2), and the cassette insertion switch is not activated.

As explained above, the cassette loading device of this invention can elastically press the cassette holder 3 to the cassette insertion position and the cassette loading position with one limiter spring 26, and can also move the cassette holder 3 back to the cassette insertion position. It also provides a buffering function when the cassette loading mechanism stops, thereby preventing the gears of the cassette loading mechanism from becoming locked.

And since only one limiter spring 26 is required,
The configuration can be simplified.

Moreover, the guide roller 5B is not tightened by the biasing force of the limiter spring 26, and the rotating arm 21
Since it is engaged with the elongated hole 22, the load on the drive motor of the cassette loading mechanism is not increased.

Although the above-mentioned embodiment has been described with respect to a VTR using a cassette tape as a recording medium, it can also be applied to a cassette-type recording and reproducing apparatus that records and reproduces a recording medium other than a cassette tape, and a cassette mounting apparatus such as an information processing apparatus.

[Effect of idea]

As explained above, in the cassette loading device of this invention, when the cassette holder moves to the cassette insertion position and the cassette loading position, the first and second pressing parts of the rotary arm are pressed against the first and second pressing parts of the slider. Since the limiter spring is pressed through the protrusion, the cassette holder can be elastically pressed to that position by the biasing force of the limiter spring.

Therefore, one limiter spring can elastically press the cassette holder to the cassette insertion position and the cassette mounting position, and can also provide a buffering function when the cassette holder moves back to the cassette insertion position and stops. It is possible to prevent the gears of the cassette loading mechanism from becoming locked. Furthermore, since only one limiter spring is required, the configuration can be simplified.

Further, since the guide roller engages with the rotating arm without being tightened by the biasing force of the limiter spring, there is an effect that the load on the drive motor of the cassette loading mechanism is not increased.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing the main parts of a cassette loading device which is an embodiment of this invention, Fig. 2 is a side view showing the cassette holder in the cassette insertion position, and Fig. 3 is a view showing the attachment of the limiter spring. FIG. 4 is an explanatory view showing the cassette holder in the cassette mounting position; FIG.
The figure is an exploded perspective view showing the main parts of a cassette loading device previously proposed by the applicant, and FIG. 6 is a side view showing the cassette holder in the cassette insertion position. In the figure, 21 is a rotating arm, 22 is a long hole, and 23
A and 23B are first and second pressing parts, 24 is a drive gear, 25 is a storage part, 25O ₁ and 25O ₂ are outer surfaces,
26 is a limiter spring, 27 is a slider, 27I ₁ ,
27I ₂ is the inner surface, 27O ₁ and 27O ₂ are the outer surface, 2
8A and 28B indicate first and second protrusions.

Claims (1)

[Scope of utility model registration request] A cassette holder provided with a plurality of guide rollers that loosely fit into a plurality of guide grooves provided on the holder support plate is coaxially supported by the holder support plate,
A cassette mounting device configured to be able to reciprocate from a cassette insertion position to a cassette mounting position by a relatively rotatable drive gear and a rotation arm engaged with one of the guide rollers. A storage portion for loading a limiter spring is provided on a side surface of the drive gear, first and second protrusions are provided that contact both ends of the limiter spring, and both inner surfaces intersecting the sliding direction are provided in the storage portion. A slider that is spaced a predetermined distance from an outer surface of the rotary arm is mounted on the housing portion, and a first and a first slider that abuts both outer surfaces of the rotating arm that are opposite to the drive gear and intersect with the sliding direction of the slider are mounted on the storage portion. 1. A cassette loading device, characterized in that said cassette holder is elastically pressed to a cassette insertion position and a cassette mounting position by the biasing force of said limiter spring.