JPS59113557A - Cassette loading device - Google Patents

Abstract

PURPOSE:To reduce the speed for the rise of a cassette, by providing a lock release charging member which charges a lock lever in such a direction that the falling motion of a lock member placed in a lock lever guiding part is stopped. CONSTITUTION:In case that a cassette holder placed in a cassette-down position is raised to a cassette-up position, a release action lever 17 supported freely turnably by a pin 18 stood on a substrate is brought into contact with a lock release kick pin 14 and is rotated counterclockwise to rotate a lock lever 26 clockwise, and the locking force due to a lock release spring 15 is released, and the lock state of a lock roll 11 fixed to a lock fixing part 26B is released, and the lock roll 11 is moved in the direction of an arrow (a), and thus, the cassette holder rises to the cassette-up position. At this time, since the lock roll 11 is charged through a guide face of the lock lever 26 by the lock release spring 15 in such a direction that the lock roll 11 counters the charging force of a cassette holder spring 27, its speed is reduced.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a cuff set attachment device.

Structure of a conventional example and its problems A conventional cassette loading device will be explained with reference to FIGS. 1 to 4. FIG. 1 is a perspective view, and FIGS. 2 to 4 are explanatory diagrams of the operation of the locking mechanism.

In Figures 1 to 4, '(1) is a cassette holder, which is used to store a cassette (not shown) loaded with magnetic tape, etc., and to move the cassette to the cassette set-up position and cassette down position. It is a member. (2)
is a cassette holder lid fixed to the cassette holder (1). (3) and (4) are presser levers for holding down the cassette, which are rotatably supported by the cassette holder (1) and configured to press and fix the cassette with springs or the like (not shown).

(5) is a sub arm, (6) is a holder support,
One end of each is rotatably supported by a cassette holder (1), and the other end is rotatably supported by a stand (7). The stand (7) is fixed to a substrate (8) such as an aluminum chassis with screws or the like. (9) is a lock pin that is fixed to the holder support (6) at one end, attached to the stand (7) at the other end, and hung on the cassette holder panel Q□. Cassette holder spring α (the other end is the stand (
7). A lock roller 0) is rotatably supported on the outer periphery of the lock pin (9). o3 lock lever This is a lock lever pin installed in Q3. Q4 is a lock release kick pin installed in the lock lever @. Qθ is a kick pin α that unlocks one end →
This is a lock release spring that is hung on the stand (7) and the other end is hung on the stand (7). The lock lever (6) is attached to the stand (7).
) is configured to rotate around a lock stand pin M implanted in a fulcrum.

1.171 is a release action lever rotatably supported by an action pin a frame fixed to the stand (7). 0 is an up detection switch that is switched by the rotation of the up detection lever Cυ rotatably supported by a pin (E), and (A) is a down detection lever (Cυ) rotatably supported by a pin (G). This is a down detection switch that switches by rotating C). The down detection lever eq is urged counterclockwise by a spring (c) (not shown) whose one end is hung on the stand (7).

Next, the operation of this device will be explained. As shown in Figures 1 and 2, when the cassette holder (1) is in the cassette setup position (a position where a cassette can be inserted into the cassette holder (1)), the lock pin (9) is activated to move the up detection lever to 0.
1) is rotated counterclockwise and switch m is turned on.
The down detection lever (C) is rotated counterclockwise by the spring (C) and the switch (A) is turned ON.
become. Insert the cassette into the cassette holder (1) at this cassette position, and as you push down the cassette holder lid (2), the cassette holder (1), sub-arm (5) and holder support (6) will move to the stand (7).
) as a fulcrum, and descends using the holder support (6) as a fulcrum.
) and lock roller a supported by lock pin (9) and lock roller a
Both υ fall in the direction of arrow A as shown in FIG.

Therefore, the up detection lever ◇ rotates clockwise due to the elasticity of the movable contact piece of the switch 0, and the switch 0 turns OFF. As the lock pin (9) descends in the direction of arrow A, the guide portion (12A) of the lock lever (6) is pushed by the lock roller (11) and moves in the direction of the arrow. Therefore, the lock lever pin a3 installed in the lock lever (6) moves in the direction of the arrow, and presses the protrusion of the down detection lever (c) in the direction of the arrow against the spring (c). , the down detection lever C241 is rotated clockwise, so the switch (A) is turned OFF.

Further, when the cassette holder (1) is pressed and lowered, the lock roller αη moves beyond the guide part (12A) of the lock lever @ to the lock fixing part (12B) of the lock lever θ, as shown in FIG. Lock the cassette holder (1) to the cassette loading position (cassette down position). At this time, the lock lever (1', 4 is the lock release spring Q9)
Since the lock lever pin 0 is biased by , the lock lever pin 0 moves in the direction of the arrow C. As a result, the down detection lever (c) rotates counterclockwise and the switch (a) is turned on again. Note that at this time, the switch is kept in the OFF state.

Also, the cassette holder in this cassette down position (
1) When raising the cassette to the cassette setup position, the board (
The release action lever αη, which is rotatably supported by the pin (G) implanted in the lock release kick pin (14), is
1 and rotate it counterclockwise, the lock lever @ rotates clockwise, releasing the lock release spring (A).
The locking force is released and the locked state of the lock roller Ql) fixed to the lock fixing part (12B) is released, so the lock roller θυ moves in the direction of the arrow small, and the cassette holder (1) returns to the cassette setup position. rise to By releasing the lock in this way, the lock roller aυ
During the short time it takes for the lock roller αV to rise to the cassette set-up position, the down detection lever (9) turns the switch OFF, but when the lock roller αV reaches the cassette set-up position, the down detection lever (c) switches back to the switch (a). O
Switch to N and hold. Further, when the lock roller (l→ reaches the cassette set-up position), the up detection lever al rotates to turn on the switch Q again. Repeat the same operation below.

In the cassette mounting device configured in this way, the spring force of the cassette holder spring θ1 required to completely raise the cassette to the cassette setup position is applied to the cassette holder spring θ1, which is required to completely raise the cassette to the cassette setup position. It was set to the necessary biasing force. That is, from the cassette down position to the up position, the biasing force of the cassette holder spring that raises the cassette is sufficient if it is the force set above. However, from the old cassette holder spring 0, the spring is stretched and stretched in the set-down position compared to the up position, and due to the spring constant, the spring force of the cassette holder spring OI in the cassette-down position is extremely large. turn into. If the spring force of the cassette holder spring is large at the cassette down position, the speed at which the cassette holder rises from the down position to the up position increases, causing a problem that the impact upon completion of raising the cassette setup position becomes large.

In addition, there are two ways to use the device: horizontally and vertically; when used vertically, the weight of the cassette and cassette holder, etc. that was acting when used horizontally is canceled out, so the cassette There is a problem in that the load when raising the cassette is reduced, the speed at which the cassette moves up from the down position to the cassette set-up position is extremely fast, and the impact upon completion of the cassette up is extremely large.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a cassette mounting device that reduces the speed at which the cassette is completely raised from the cassette down position to the cassette set up position, which is the problem mentioned above.

Structure of the Invention In order to achieve the above-mentioned object, the present invention includes a cassette up-and-down mechanism that moves the cassette holder up and down between a cassette set-up position and a cassette-down position, and a cassette up-and-down mechanism that is provided in the cassette up-and-down mechanism to move the cassette holder up and down. a locking member that moves in conjunction with the vertical movement of the cassette; a biasing member that biases the cassette up-and-down mechanism and the locking member in the direction of the cassette setup position; The cassette holder has a guide part that comes into contact with the locking member when the holder is in the up position and when it is lowered, and a lock fixing part that comes into contact with the locking member when the locking member moves beyond the guide part and the cassette holder is lowered to the cassette down position. The structure includes a lock lever and a lock release biasing member that biases the lock lever in a direction to prevent the lock member located in the lock lever guide portion from moving downward, thereby reducing the speed when the cassette is raised. It is something that can be done.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on the drawings. Fifth
7 to 7 are explanatory views of the operation of the locking mechanism section of the cassette loading device which is an embodiment of the present invention. (1) to (9) in the figure
), α→, 0 to g5 are the same as those with the same numbers shown in FIGS. 1 to 4, and have the same structure. In (A), the lock lever 1 is a cassette holder dowel spring, and the lock lever (A) is in contact with the lock roller aη even in the cassette set-up position.

When the cassette holder (1) is in this cassette mounting device, the lock lever (c) is slightly rotated clockwise by the lock roller αη. Therefore, the down detection lever (A) is also rotated clockwise, and the switch (A) is turned OFF.

to the cassette holder (1) in this cassette setup position.

Insert the cassette and press down on the cassette holder lid (2) until the cassette holder (1) is removed.

The sub-arm (5) and holder support (6) descend using the stand (7) as a fulcrum, and the lock pin (9) and lock roller αυ supported by the holder support (6) both move as shown in FIG. Descend in the direction of arrow A. Therefore, the up detection lever H is set to switch (19).
Due to the elasticity of the movable contact piece, it rotates clockwise and the switch θ is turned off. And lock pin (9)
As the lock lever (C) descends in the direction of arrow A, the guide portion (26A) of the lock lever (C) is further pushed by the lock roller αη and moves in the direction of the arrow. Therefore, the lock lever pin a3 installed in the lock lever (c) moves in the direction of the arrow opening, presses the protrusion of the down detection lever ■ in the direction of the arrow opening against the spring (a), and down To further rotate the detection lever (c) clockwise, turn the switch (c) off.
maintain the condition.

Furthermore, when the cassette holder (1) is depressed and lowered, the lock roller Qv moves over the guide part (26A) of the lock lever (A) to the lock fixing part (26B) of the lock lever (A), and as shown in FIG. Lock the cassette holder (1) in the cassette mounting position (cassette down position) as shown.

At this time, the lock lever (C) is biased by the lock release spring (C), so the lock lever moves in the direction of the arrow C.This causes the down detection lever (C) to move.
rotates counterclockwise and turn the switch (a) on again. Note that at this time, the switch 0 is kept in the OFF state.

Also, the cassette holder in this cassette down position (
1) When raising the cassette to the cassette setup position, the board (
The release action lever (17) rotatably supported by the pin α8) installed in the unlocking kick pin α
The lock lever (A) rotates clockwise by contacting it with ■ and rotating it counterclockwise, and the lock release spring q
9 is released and the locked state of the lock roller (1) fixed to the lock fixing part (26B) is released, so the lock roller gυ moves in the direction of the arrow small, and the cassette holder (1) Raise to the cassette setup position.

At this time, the lock roller αη is released from the cassette holder spring (
Since it is urged in a direction that resists the urging force of (a), its speed is reduced. Then, for a short period of time when 1υ rises to the cassette setup position, the lock roller (on the down detection lever) turns off the switch (a), but when the lock roller U, ]) reaches the cassette setup position, the down detection lever ( In c), switch (a) is turned ON again and held. Further, when the lock roller 01) reaches the cassette setup position, the up detection lever &]) rotates and the switch H is turned ON again. Repeat the same operation below.

In the conventional cassette mounting device, the spring force of the cassette holder spring aO required to completely raise the cassette will be explained with reference to FIG.

W: Cassette holder weight θl: Angle l between action bin (18) and lock pin (9) center line O and perpendicular P FB: Spring force na of cassette holder spring θ0
: Number of fulcrums supported on cassette holder (1) nb: Number of fulcrums supported on stand (7) μ: Friction coefficient at each fulcrum FA, : Force required to hold W FA2: Friction at each fulcrum of cassette holder Resistance force FA3: Frictional resistance force at each fulcrum of the stand.

Binding, W=500 frl θ1=35°, θ2-45
If °na = 4 points, nb = 5 points, μ = 0.8, then FAl -W//S■θ1 v-500/5i0
35° = 871frFA2 = (W/na
X 1t ) X na = (500/4X0.8)
X4 = 150fr FA3 = (w/nb X p ) X nb-(5
00/4 X O, 8)
fr.

Therefore, the spring force FB required for the cassette holder spring 01 is FB=FA/sinθ2=1171/5in45°=
It will be 1656gr.

Next, in the cassette loading device of the present invention, the spring force of the cassette holder spring @ required to completely raise the cassette will be explained based on FIG.

W: θ1. θ2,0. P is the same as in FIG.

FC: Spring force of lock release spring QE) 11: Length between lock stand pin 0Q and lock release kick pin α→ θ3: Angle between perpendicular direction to 21 and direction of action of lock release spring (1→) X: Lock roller 0p and Guide part of lock lever (a) (
26A) Contact point Q: Line connecting X with the center of lock roller (11) and lock pin (9) Q2: Length of perpendicular line from lock stand bin 0Q to straight line Q FE: Lock lever released by lock release spring 09 (G) Force acting on the lock roller μυ via the guide part (26A) FF: Force acting on the lock release spring Q9 to raise the cassette θ4: Angle between straight line O and straight line Q, na = 5 points , nb=5 points, norr=2
．． 8mm, 12=32Hθ3-8°, θ4-10°, F
Assuming C=1400gr, find the force FF acting on the lock release spring 09 to raise the cassette.

FD=FCcoss°=1400XCOS8°=1
886frFE = FDX 11/L+ 7i-1
218frFF = FEsin 10' = 241
It becomes fr.

Next, find FA: FA = W/sin θ= 500/sin 85
° =87H7rFA2 = (W/naXμ)Xna
= (50015X0.8)X4 =-= 150
fr FAs = (W/nbx μ) Xnb = (50
015X O, 8) X 4 = 1501/r, and FA becomes 1171fr.

Therefore, the force FH required to raise the cassette using the cassette holder spring (a) is FA - FF = 1171-241 = 980 f
r, and the spring force FG required for the cassette holder (5) is FG=FH/sinθ2=980/5in45°=1
It will be 815 years.

As mentioned above, it was possible to reduce the cassette holder spring force of 1815 fr, about 341 Fr, from the conventional cassette holder spring force of 1656 fr. As a result, as shown in FIG. 10, the time required to rise from the cassette down position to the cassette set up position (ejection time) could be reduced from the conventional straight line (e) to a straight line. In other words, when used vertically,
．． 0.12 seconds from 0.09 seconds, conventional 0.16 when used horizontally
It was possible to increase the length from seconds to 0.22 seconds, and it was possible to slow down the speed when rising from the cassette down position to the cassette set up position.

Effects of the Invention According to the present invention, by bringing the lock lever into contact with the locking member, the urging force of the lock release urging member can be effectively used, and the impact when the cassette set-up position has been raised can be significantly reduced. Moreover, it can be realized with a simple configuration, and its effects are extremely large.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a conventional cassette loading device, FIGS. 2 to 4 are explanatory diagrams of the operation of the locking mechanism of the same device, and FIGS. 5 to 7 are cassette loading devices according to an embodiment of the present invention. FIG. 8 and FIG. 9 are explanatory diagrams for calculating the cassette holder springs of the conventional and present invention, respectively, and FIG. 10 is a characteristic diagram without showing the ejection time. (υ...Cassette holder, (9)...Lock pin,
Qυ...Lock roller, ([3...Lock lever pin, a4)...Lock release kick pin, θ...Lock release spring, Oη...Release action lever, (A)...Lock lever -1 (26A)...Guide section, (2
6B)...Lock fixing part, (A)...Cassette holder spring agent Yoshihiro Morimoto @qFigure 10

Claims (1)

[Claims] 1. A cassette up and down mechanism that moves the cassette holder up and down between a cassette setup position and a cassette down position;
a locking member that is provided on the cassette upper and lower base structure and moves in conjunction with the vertical movement of the cassette holder; and an urging member that urges the cassette up and down mechanism and the locking member in the cassette setup position 14 direction. a guide part which is rotatably held on a substrate and comes into contact with the locking member when the cassette holder is in an up position and is lowered; and when the locking member moves beyond the guide part and the cassette holder is lowered to a cassette down position. A lock lever having a lock fixing part that engages with the lock member, and a lock release urging member located in a guide part of the lock lever and urging the lock lever in a direction to prevent the lock member from moving downward. Cassette loading device.