JPH0519892Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a tape loading mechanism of a small tape cassette adapter used, for example, when loading a small tape cassette into a standard tape cassette recording/reproducing device. More specifically, the present invention relates to a tape loading mechanism for a small tape cassette adapter, which is a partially improved mechanism.

[Conventional technology]

FIG. 5 shows the tape loading mechanism of the first conventional adapter 1 for small tape cassettes which the present applicant has already disclosed in Utility Application No. 116938/1983. It shows the state that has been applied. This tape loading mechanism consists of an operating knob 3 consisting of a rotating disc, a special chain 4 linked to the operating knob 3, and a movement of the special chain 4 to move the arrows A ₁ , A ₂ around a shaft 5.
A first loading arm 7 that rotates in the direction shown in FIG. Arrow X ₁ , X ₂
A link 9 that moves linearly in a direction, a change lever 11 connected by a shaft 10 at one end of this link 9, a gear train 12 that meshes with this change lever 11, and a shaft that interlocks with this gear train 12. The main mechanical element is constituted by a second loading arm 15 which rotates in the directions of arrows B ₁ and B ₂ about 13 and has a loading pole 14 for guiding the tape hanging from its tip.

As shown in the exploded perspective view of FIG. 6, the change lever 11 has a fan-shaped cam portion 11a formed therein, and is supported on the frame of the adapter 1 by a shaft 10 consisting of a screw, a washer, a collar, etc. gear train 12
is a transmission mechanism element that supplements the clearance between the change lever 11 and the second loading arm 15, and includes a plurality of first, second, and third gears 12a,
It consists of 12b and 12c, and is biased by a spring (not shown) to prevent crashing. The second loading arm 15 consists of a plate 16, a loading pole 14 hanging from the plate 16, and a gear 17 formed at the tip of the shaft 13, and the gear 17 meshes with the third gear 12c. .

Note that the gear train 23 includes the operation knob 3 and the take-up reel 2.
1 to wind up the magnetic tape 18.

The operation of this tape loading mechanism will be explained below. This tape loading mechanism operates the first and second loading arms 7, 15 located on the left and right sides of the frame of the adapter 1 through the small tape cassette 2 during tape loading.
It performs a tape feeding operation that expands in the A ₁ and B ₂ directions and pushes the tape to the front of the cassette 1, and during tape unloading, it contracts and closes in the A ₂ and B ₂ directions, respectively, and pulls the tape in the 2 directions of the small tape cassette. Perform tape winding operation. Then, when the operation knob 3 is rotated clockwise, the special chain 4
is pulled into the J-shaped guide groove 20, and the first loading arm 7 is pulled by the special chain 4 and rotates clockwise about the shaft 5 to the position shown by the two-dot chain line. Further, the rotation of the first loading arm 7 is converted into a linear motion via the link 9 and moves in the direction of the arrow _X1 , and this linear motion is caused by the cam portion 11a of the change lever 11 integrated with the link 9 The cam movement is transmitted to the first, second, third gears 12a, 12b,
12c and converted into rotational motion, and the third
The gear 17 of the second loading arm 15 that meshes with the gear 12c is rotated, and the second loading arm 15 moves counterclockwise around the shaft 13 to the position shown by the chain double-dashed line by the transmitted rotational force. Rotate until. By the rotation of the first and second loading arms 7 and 15, the loading poles 6 and 14 pull out the magnetic tape 18 from the small tape cassette 2 stored in the cassette storage section, and load the tape inside the adapter 1. A dewing operation is performed to form a tape path 19 on the front side of the standard tape cassette. In this state, the adapter 1 is attached to a standard recording/reproducing device in the same way as the standard tape cassette, and recording and reproduction are performed on the magnetic tape 18 of the small tape cassette 2.

Further, when unloading the tape forming the tape path into the small tape cassette 2, the operation knob 3 is operated counterclockwise. By this operation, the special chain 4 is paid out, the first loading arm 7 is rotated counterclockwise, and the second loading arm 7 is moved through the link 9 moving in the direction of the arrow _X2 and the gear train 8. The loading arm 15 rotates clockwise, and furthermore, the rotation of the operating knob 3 is transmitted via the gear train 12 to the take-up reel 15 in the small tape cassette 2, which rotates clockwise to take out the tape. Wind it up. This results in
The magnetic tape 18 is wound and stored in the cassette 2, and tape unloading is performed. After this,
Open the top cover 22 and remove the small tape cassette 2.
Push up and take out the small tape cassette 2 from the storage section.

Next, the differences between the tape loading mechanism of the second conventional small tape cassette adapter disclosed by the present applicant in Utility Application No. 106331/1988 from the first conventional example will be explained.

This tape loading mechanism has the first, second and third gears 12a, 12b, 12c of the conventional example.
Instead of the gear train 12 consisting of a push lever, a single push lever is used and an integrated cam is provided on the push lever. The signal is transmitted to the second loading arm via the tape, and the second loading arm rotates to form a predetermined tape path. Further, a lock lever is provided to press and hold the loading pole of the second loading arm during tape loading.

[Problem that the invention attempts to solve]

As shown in the exploded perspective view of FIG. 6, the transmission and crimping mechanism elements interposed between the second loading pole and the link are provided by a plurality of gears corresponding to the clearance of the cassette of the first conventional example. A gear train 12, that is, a first gear, a second gear, a third gear 12a,
12b and 12c, and the second
A mechanical element for engaging and interlocking with this gear train 12, that is, a change lever 11 on which a gear 17 and a cam portion 11a are formed, is linked to the second loading arm and link, respectively. It had to be installed in one piece.

On the other hand, in the second conventional cassette, in addition to the connecting rod (push lever), a cam integrated therewith was provided, and a crimping member such as a lock lever was also required.

Therefore, in both the first and second conventional examples, the number of parts used as mechanical elements is large, and the assembly work of the tape loading mechanism is also troublesome.
Overall, costs were high. In addition, the mechanical mechanism was complicated, and as a result, there was a risk of malfunctions occurring.

The purpose of the present invention is to provide a tape loading mechanism for a small tape cassette adapter that solves the above-mentioned problems, reduces the number of parts, improves assembly workability, and simplifies the mechanism. shall be.

[Means for solving problems]

In order to achieve the above object, the tape loading mechanism of the small tape cassette adapter of the present invention pulls out the recording tape of the stored small tape cassette by opening the first and second loading arms, and loads it onto a predetermined tape. In the tape loading mechanism of the small tape cassette adapter formed by forming a path, a flat push lever is provided which interlocks with the second loading arm, and a predetermined interval is maintained at the forward end of the push lever. A crimping portion consisting of a plurality of hook-shaped portions arranged in parallel in a vertically protruding manner is formed integrally with the push lever, and the crimping portion is formed integrally with the push lever so that the second loading arm is moved in the forward direction during the tape loading operation. The hook-shaped portion of the push lever contacts the loading pole of the second loading arm and presses the loading pole toward the stopper, thereby forming the predetermined tape path. This is an adapter for small tape cassettes with special features.

[Effect]

During tape loading, the loading pole of the second loading arm simply moves the push lever in the forward direction, and the forward end of the push lever comes into contact with the crimping part formed integrally with the push lever, so that the loading pole of the second loading arm is accurately attached to the stopper. A predetermined tape path can be easily formed.

Further, during tape unloading, the loading pole is released from the pressure bonding by the pressure bonding portion as the push lever moves backward, and the recording tape is easily stored in the small tape cassette.

〔Example〕

Hereinafter, one embodiment of the tape loading mechanism of the small tape cassette adapter according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view of the tape loading mechanism seen from the back side with the cover of the adapter 30 removed, and shows a small tape cassette 22 set therein.
Indicates tape loading status. FIG. 2 is an exploded perspective view of the crimping mechanism of the second loading arm.

The tape loading mechanism of the adapter for small tape cassettes of the present invention includes an operating knob 3 that rotates manually or driven by a motor, a lock lever 31 that locks the first loading arm 7, and a linear motion of the link 9 that converts the linear motion into a rotational motion. A cylindrical change plate 32 that converts into
By inserting the rotation shaft 33 of 2, change plate 3
2, the push lever 35 linearly moves in the forward direction Y ₁ and the rear direction Y ₂ and has a crimp portion 34 formed at its front end, and rotates in conjunction with this push lever 35 to the stopper 36 position. Its main mechanical element is composed of a moving second loading arm 37.

As shown in the exploded perspective view of FIG. 2, the change plate 32 consists of two upper and lower discs 32a and 32b into which the push lever 35 is inserted, and a hole 32c is bored in the center through which the rotating shaft 33 passes. ing. The upper disk 32a has a cutout 32d extending outward from its approximate center and a circular protrusion 32e, and a screw, collar, etc., which is screwed into the hole 32f of the protrusion 32e, can be tightened. It is connected to the link 9 by a tool.

The push lever 35 consists of a plate 35a and an L-shaped plate 35b that are integrally molded during the manufacturing process.The plate 35a has a step equal to the thickness of the upper disk 32a of the change plate 32, and the L-shaped plate 35b is formed at the front end of the plate 35a. It has a structure that is suspended from the ceiling. Further, the plate 35a has two elongated holes 35c and 35d arranged in parallel approximately in the center thereof, and a notch 35e extending outward at the rear end thereof, coaxially along the direction of movement. As shown in the crimping mechanism around the loading arm in FIGS. 3A and 3B, fixing pins 37a and 37b and a rotating shaft 33 pass through these elongated holes 35c and 35d and the notch 35e, respectively, and are guided by these. push lever 35
linear movement is performed reliably and smoothly. The fixing pins 38a, 38b and the rotation shaft 33 are mounted on pedestals 39a, 39b, which are integrally molded with the frame of the adapter 1.
The shaft is fixed to 39c.

Further, a first engagement pin 39a and a second engagement pin 39b are integrally formed with the plate 35a at predetermined positions on the plate 35a. The first engagement pin 40a is formed close to the fixed pin 40b and with a predetermined gap therebetween, taking into account the relative positional relationship between the pins, and engages and interlocks the push lever 35 and the second loading arm 37. This is for converting and transmitting the linear motion of the push lever 35 into a smooth rotational motion of the second loading arm 37. The crimping part 34 includes two hook-shaped parts 34 arranged vertically and flush with each other with a predetermined interval maintained at the front ends of the plate 35a and the L-shaped plate 35b.
It consists of a and 34b. L of hook-shaped parts 34a, 34b
The recessed portions 34c and 34d have a predetermined length and a notch angle so as to come into contact with a loading pole 41 of a second loading arm 37, which will be described later, to reliably press it and press it against the stopper 36.

The second loading arm 37 includes an S-shaped plate 37a and a spindle-shaped loading pole 41 suspended from the outer end of the plate 37a for guiding the magnetic tape. The proximal end of the plate 37a is widened, and a hole 37b and an arcuate hole 37c, through which the fixing pin 38a and the first engagement pin 40b pass through, respectively, are formed at predetermined positions in this widened portion. It is drilled in. Arc-shaped hole 37c
When the push lever 35 and the second loading arm 37 are interlocked, the second loading arm 37 moves to the stopper 36 earlier than the forward movement of the push lever 35 during tape loading.
Rotate the loading pole 4 in this position.
1 is reliably crimped onto the crimping portion 34 of the push lever 35, a predetermined arc width and radius of curvature of the arc are determined.

The operation of the tape loading mechanism of this embodiment having such a configuration will be explained with reference to FIGS. 3 and 4.

FIGS. 3A and 3B are a plan view and a view of the crimping mechanism around the second loading arm during tape unloading, respectively;
FIGS. 4A and 4B are a plan view and a view, respectively, showing the crimping mechanism around the second loading arm during tape loading, and a view taken along the - line.

During tape unloading before a tape loading operation, the magnetic tape 18 is stored in the small tape cassette 22, and the first and second loading arms 7, 37 are attached to the small tape cassette 22.
It is contracted and closed in the direction. From this state, when the operating knob 3 is rotated clockwise and the first loading arm 7 is rotated via a transmission element such as the special chain 4, the link 9 connected thereto is
X pulled in _one direction. Accordingly, the change plate 32 connected by the shaft 10 is rotated by the clamp mechanism by a predetermined amount in the direction indicated by the arrow around the rotation shaft 33. This rotational movement is caused by the second engagement pin 40b.
is transmitted to the push lever 35 which engages with the change plate 32, and the push lever 35 slides through the notch 32d along the elongated holes 35c and 35d while being reliably guided by the two fixing pins 38a and 38b in the forward direction _Y1 . The second engagement pin 40b moves linearly and smoothly by the amount of movement of the moving second engagement pin 40b.

As the push lever 35 moves linearly, the first engagement pin 40a on the push lever 35 that engages with the second loading arm 37 also moves smoothly in the forward direction _Y1 along the arc-shaped hole 37c. As a result, the second loading arm 37 rotates in the stopper direction _A1 about the fixing pin 38a while pressing the magnetic tape 18. In this case, the second loading arm 37 reaches the stopper 36 position earlier than the push lever 35 due to the upright position of the first engagement pin 40a and the drilled position and width of the arcuate hole 37c.

And as shown in Figure 4, loading pole 41
When the push lever 35 is pressed, the push lever 35 comes into contact with the L-shaped recesses 34c and 34d of the crimping part 34 formed at the tip of the push lever 35, and is securely crimped into the V-groove of the stopper 36 due to its upper and lower two-point support. Hold the lever. Then, a predetermined tape path is formed so that the tape can be mounted on a recording/reproducing head of a standard recording/reproducing device. During this tape loading, the first loading arm 7 is locked by the lock lever 31 at the stopper position.
This state continues to be maintained unless the operation knob 3 is operated.

At the time of tape unloading, all the mechanical elements are rotated or moved in the opposite direction to that at the time of tape loading by rotating the operating knob 3 counterclockwise, thereby releasing the lock of the first loading arm 7. At the same time, the pressure on the push lever 37 is released to release the second loading arm 37 from its pressed state. As a result, the first and second loading arms 7, 37 contract and close in the direction of the small tape cassette 22, and the magnetic tape 18
will be stored in the small tape cassette 22.

In this embodiment, the push lever 35 may be biased in the _Y1 direction by a spring.
This has the advantage that the pressure of the pressure-bonding portion 34 against the loading pole 41 is increased, and the tape loading state can be maintained more stably.

[Effect of idea]

As explained above, according to the tape loading mechanism of the adapter for small tape cassettes according to the present invention, the crimping part consisting of a hook-shaped part is formed integrally with the push lever at the tip of the push lever.
The number of parts in the tape loading mechanism can be reduced compared to the conventional one, which improves the ease of assembly of the tape loading mechanism, and also simplifies the mechanism, making it possible to provide an adapter for small tape cassettes that is low cost and has fewer failures. effective.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the tape loading mechanism of the small tape cassette adapter according to the present invention, FIG. 2 is an exploded perspective view of the crimping mechanism of the second loading arm, and FIGS. The figures are diagrams for explaining tape unloading and tape loading in one embodiment, FIG. 5 is a plan view showing a tape loading mechanism of a first conventional adapter for a small tape cassette, and FIG. 5 is an exploded perspective view of the crimping mechanism of FIG. 5. FIG. 1...Adapter for small tape cassette, 2...
Small tape cassette, 3...operation knob, 7...first loading arm, 9...link, 32...
...Change plate, 34...Crimping part, 34a,
34b... hook-shaped part, 35... push lever, 3
6...stopper, 37...second loading arm, 41...loading pole.

Claims (1)

[Scope of utility model registration request] In the tape loading mechanism of the adapter for a small tape cassette, the tape loading mechanism of the adapter for a small tape cassette is configured to draw out the recording tape of the stored small tape cassette and form a predetermined tape path by the opening operation of the first and second loading arms. A flat push lever is provided which interlocks with the loading arm of the push lever, and a crimping section consisting of a plurality of hook-shaped sections which are arranged in parallel and projecting vertically at a predetermined interval is provided at the forward end of the push lever. integrally formed, and the hook-shaped portion of the push lever is connected to the loading pole of the second loading arm by the forward movement of the second loading arm accompanying the tape loading operation. An adapter for a small tape cassette, characterized in that the loading pole is pressed against the stopper in the direction of the stopper so that the predetermined tape path is formed.