JPS6325541Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recorder, particularly a cassette tape recorder, and is intended to improve the operating mechanism of the cassette holder ejector and power switch.

Conventionally, cassette tape recorders have been configured so that the cassette holder eject and power switch are operated by separate operating levers, which requires a large number of parts and a complicated configuration, resulting in high costs and complicated operations. There were disadvantages such as sexual inconvenience.

Therefore, the present invention has been devised to eliminate such drawbacks.

A specific example of the present invention will be explained below with reference to the drawings.
The drawing shows an example of a cassette tape recorder to which the present invention is applied, with the tape drive system and other members not directly related to the present invention being omitted.

In the figure, reference numeral 1 indicates a group of operation buttons, namely a fast forward button (hereinafter referred to as FF button) 1a, and a rewind button (hereinafter referred to as REW button).
button) 1b, play forward button (hereinafter referred to as FWD button) 1c, record button (hereinafter referred to as REC button) 1d
and a stop/eject button (hereinafter referred to as ST/EJ button) 1e.
The EJ button 1e is arranged in a superposed state with the FWD button 1c, so it is illustrated by a two-dot chain line. 2 is ST/EJ
The button lock plate 2 of this example shows a button lock plate that locks each push button in its pressed position except for the button 1e.
FF button 1a, REW button 1b, FWD button 1c and REC
It has locking pieces 2a, 2b, 2c, and 2d corresponding to the buttons 1d, and protrusions 2e corresponding to the ST/EJ buttons 1e, and the shaft lever 3 allows sliding in the left-right direction in FIG. It is pivoted so that it can move and rotate up and down. That is, this button lock plate 2 has ST/EJ button 1 on each locking piece 2a, 2b, 2c, and 2d.
Each pushbutton except e and integrated operating levers 4a, 4
locking pieces 5a protruding from b, 4c and 4d;
The torsion coil spring 6 is mounted between the support 7 and the pivot ring portion 8 of the button lock plate 2 by the pivot lever 3 so that the torsion coil spring 6 is engaged with the pushbuttons 5b, 5c, and 5d by pressing each pushbutton.
the ends 6a and 6b of the button lock plate 2.
is elastically engaged with the inner surface of the chassis 9 and the inner edge of the chassis 9, thereby constantly applying a sliding biasing force to the right in FIG. 1 and a rotational biasing force upward.

When the locking pieces 2a...2d and 5a...5d engage, the locking pieces 5a of the FF button 1a and the REW button 1b
and 5b are engaged more deeply than the engaged state of the locking piece 5d of the REC button 1d. That is, the locking pieces 2a, 2b, 2d
and 5a, 5b, 5d are triangular locking pieces 2a, 2
b, 5a, 5b engagement width T ₁ and locking pieces 2d and 5d
The engagement width _T2 is configured such that _T1 > _T2 . The locking piece 2c has a four-sided shape with an inclined sliding surface, and the locking piece 5c of the FWD button 1c has a step 5c' formed on the sliding surface, and this step 5c' forms the front edge of the locking piece 2c. The relationship between the engagement width T ₃ of the two pieces 2c and 5c and the above-mentioned engagement width T ₁ is such that T ₃ ≧T ₁ .

Guide grooves 10a, 10b, 10c are formed in the operating levers 4a, 4b, 4c of the FF button 1a, REW button 1b, and FWD button 1c in the sliding direction thereof, and guide protrusions 11a, 11a, 11a, 10c, and 10c are formed in the sliding direction of the operating levers 4a, 4b, 4c of the FF button 1a, REW button 1b, and FWD button 1c, respectively. 11b,
11c so that it always slides in a normal state, and its respective operation levers 4a, 4b, 4
c is biased in the push-out direction of the button by springs 12a, 12b, and 12c.

Further, an arm piece 13 is protruded and extended from the operating lever 4d of the REC button 1d in the lateral direction, that is, in the direction of the operating lever 4c of the FWD button 1c, and is engaged in the pushing direction with an engaging stepped portion 14 formed on the operating lever 4c. Further, the above-mentioned locking piece 5d is provided on the edge of this arm piece 13 to protrude upwardly.

The ST/EJ button 1e is provided with a protruding pressing piece 5e facing the protrusion 2e of the button lock plate 2.
By pressing the ST/EJ button 1e, the protrusion 2e is pressed and the button lock plate 2 is rotated downward in FIG.

Next, the operational relationship between the operation push button group 1 and the button lock plate 2 constructed as described above will be explained.

First, press FF button 1a, REW button 1b or REC button 1d.
When pushed in, the locking pieces 5a, 5b or 5d
The inclined side edges of the locking pieces 2a, 2 of the button lock plate 2
The coil spring 6 slides into contact with the inclined side edge of b or 2d and presses along the inclination to twist the button lock plate 2.
in the left direction (arrow a) in Figure 1 against the biasing force of
direction) and lock the locking pieces 5a, 5b or 5d.
When the button gets over the locking pieces 2a, 2b or 2d, the button lock plate 2 is slid back to the right (in the direction of arrow a'), and the locking pieces 5a, 5b or 5d move over the locking pieces 2a, 2b or 2d.
Engaged with the front edge of 2b or 2d and pushed in
The FF button 1a, REW button 1b, or REC button 1d is locked in the pressed state.

When the FWD button 1c is pushed in, the locking piece 5c slides against the sliding surface of the locking piece 2c of the button lock plate 2 and presses along the slope of the surface, twisting the button lock plate 2 and deflecting the coil spring 6. When the locking piece 5c overcomes the locking piece 2c by rotating downward in FIG. 1 (in the direction of arrow b in FIG. 6) against the force, the button lock plate 2 is rotated upward (in the direction of arrow b' in FIG. 6). ), the stepped portion 5c' of the locking piece 5c is engaged with the front edge of the locking piece 2c, and the FWD is activated.
The button 1c is locked in the pressed state.

When the REC button 1d is pressed in the above operation, the operating lever 4d is engaged with the operating lever 4c of the FWD button 1c in the pushing direction via the arm piece 13, so the operating lever 4c also slides together with the operating lever 4d. and FWD button 1c is
Both buttons 1c and 1d are pressed simultaneously in conjunction with the REC button 1d, and the button lock plate 2 undergoes both sliding and rotational movements as described above, and both buttons 1c and 1d are locked. and enters the recording operation state.

When the FF button 1a or the REW button 1b is pressed in this state, the button lock plate 2 is slid in the direction of the arrow a as described above, but the locking piece 2a or 2b and the FF button 1a or the REW button are
The engagement width T1 between the locking piece 5a or 5b of the button _1b is the engagement width between the locking piece 2d and the locking piece 5d of the REC button 1d.
Since it is larger than T ₂ , the engagement between the locking pieces 2d and 5d is released, and only the REC button 1d is unlocked.
It will be in fast forward or rewind mode.

Also, when FWD button 1c is in the locked state, REC button 1d is pressed.
When pushed in, the button lock plate 2 slides in the direction of arrow a, but the engagement width _T3 between the locking piece 2c and the locking piece 5c of the FWD button 1c is such that the button lock plate 2 is not engaged with the REC button 1d. The FWD button 1c is larger than the length of the pressing and sliding movement by the locking piece 5d, that is, the engagement width _T2 between the locking pieces 2d and 5d.
is held in the locked state, and the REC button 1d is locked in the depressed state, resulting in a so-called post-recording operation state.

To unlock each of the operation push buttons 1a...1d, when the ST/EJ button 1e is pressed, the pressing piece 5e comes into contact with the protrusion 2e of the button lock plate 2 and is pressed. The locking pieces 5 of the buttons 1a...1d are rotated downward (in the direction of the arrow b in FIG. 6) against the biasing force of the buttons 1a...2d.
a...This is done by separating downward from 5d and releasing the engagement. The lock can also be released by sliding the button lock plate 2 in the direction of arrow a in FIG.

Next, the operating mechanism of the eject power switch implemented in this example will be explained.

In the figure, 21 is an ejector lever formed in a π-shape, and a horizontally long piece 21a is disposed opposite to a protrusion 5c'' protruding from the edge of the operating lever 4c of the FWD button 1c. 21a' faces the loading surface of the cassette so that the lock pawl 22 of the cassette holder (not shown) engages from the inner edge thereof, and the inner edge end is connected to the receiving part 2 on the chassis 9 side.
3 and serves as a rotational fulcrum, and the central inner edge is engaged with a pin 24 protruding from the chassis 9. Further, one vertically long piece 21b has a tip 21b' extended so as to face the ST/EJ button 1e, and an engagement piece 5e' that is longer than the pressing piece 5e protruding from the ST/EJ button 1e. An engagement groove 25 is formed in which the button 1 is engaged with a concave and convex portion, and an oblique elongated hole 26 that is inclined at a predetermined angle with respect to the operating direction of the ST/EJ button 1e is formed near the connecting portion with the horizontally long piece portion 21a. The eject lever 21 is slidably supported by being engaged with a shaft 27 protruding from the chassis 9, and the tip 21c' of the other vertically long piece 21c is the FF button 1a,
It is bent laterally so as to be located between the protrusions 5a' and 5b' protruding from the operating levers 4a and 4b of the REW button 1b and the power switch 28, and the chassis facing surface of this tip 21c' A projecting piece 29 is provided protruding from the side and faces the operator 28a of the power switch 28.

The ejector lever 21 configured in this way is
A spring 30 is stretched between the inner edge of one of the vertically long pieces 21b and the chassis 9 so as to be always biased in the direction of the operating push button group 1.

To explain the operation of the ejector lever 21, first, when a cassette is accommodated and set in the cassette holder in the state shown in FIG. One end 21 of the horizontally long piece 21a of
a' to maintain the set state of the cassette. For example, when the FWD button 1c is pressed, the operating lever 4c is slid and the protrusion 5c'' on the edge presses the horizontally long piece 21a, so that the ejector lever 4c
1 is rotated as a whole (clockwise in the figure). That is, the one end 21a' of the horizontally long piece 21a is rotated against the biasing force of the spring 30 using the abutment engagement part with the receiving part 23 as a fulcrum, and this rotation causes the tip 21b of the one vertically long piece 21b to rotate. ' is ST/EJ
As the position facing the button 1e is shifted, the tip 21c' of the other vertically long piece 21c is moved toward the power switch 28, and the protruding piece 29 presses the operator 28a of the power switch 28 to turn the switch on. Even if the ST/EJ button 1e is pressed in this state, the engagement piece 5e' is not engaged with the tip engagement groove 25 of one vertically long piece 21b, and therefore one vertically long piece 21b is not pressed. The ejector lever 21 is held in the above-mentioned state, and the locked state of the cassette holder by the one end 21a' of the horizontally long piece 21a is maintained.

Then, press the ST/EJ button 1e further and press the pressing piece 5e.
Press the protrusion 2e of the button lock plate 2 to rotate the button lock plate 2 and release the lock of the FWD button 1c.
When it returns to the stopped state, the eject lever 2
1 is returned to its original state by the biasing force of the spring 30, and the pressure on the operator 28a of the power switch 28 is also released, resulting in an OFF state (the state shown in FIG. 7A). When the ST/EJ button 1e is pressed again in this state, the engagement piece 5e' is engaged with the tip engagement groove 25 of one vertically long piece 21b of the eject lever 21 and presses the vertically long piece 21b. As a result, the inner edge of the inclined elongated hole 26 is engaged with the shaft 27, and the eject lever 21 as a whole moves in the opposite direction to the above case (counterclockwise in the figure) using the engaged part as a fulcrum. ), one end 21a' of the horizontally long piece 21a is separated from the lock claw 22 of the cassette holder, and the lock can be released and the cassette can be taken out. At this time, the tip 21c' of the other vertically long piece 21c of the ejector lever 21 is further separated from the power switch 28, so the power switch 28
remains off.

The above operation is performed by operating the FF button 1a and the REW button 1b, and by sliding the operating levers 4a and 4b, the protrusions 5a' and 5b' are moved to the tip 21c of the other vertically long piece 21c of the eject lever 21. Fast forwarding or rewinding is performed in the same way by contacting and pressing REC button 1d, and when recording is performed by operating REC button 1d, FWD button 1 is pressed in conjunction with the pressing operation of REC button 1d.
Since c is operated, the operation is the same as described above.

Note that if the REC button 1d and FWD button 1c are configured to be operated separately, the REC button 1d and FWD button 1c may be operated separately.
The operating lever 4d of the button 1d may be brought into contact with the ejector lever 21 in the same manner as the operating lever 4c of the FWD button 1c.

As described above, according to the present invention, the lock part of the cassette holder, the operation part of the power switch, and the engagement part of the ejector operation button are formed on the ejector lever, and the ejector lever can be used as the feed lever, the fast-forward lever, and the winding lever. It is arranged opposite to the operating direction of the travel control lever such as the return lever, and is rotated by operating one travel control lever to turn on the power switch, and is configured to release the set lock of the cassette holder by operating the eject operation button. Furthermore, since the ejector of the cassette holder and the power switch are operated by the operation of an integrated operating lever, the structure is simplified, the cost can be reduced, and the operability is significantly improved.

[Brief explanation of drawings]

Fig. 1 is a schematic plan view of the main parts of an example of a cassette tape recorder to which the present invention is applied, Fig. 2 is a perspective view of the lock part, Fig. 3 is a perspective view of the eject part, and Fig. 4 is a button lock. a cross-sectional view of a portion of the plate;
FIG. 5 is a longitudinal sectional view of the same, FIG. 6 is an enlarged longitudinal sectional view of other parts of the button lock plate, and FIG. 7 is an explanatory diagram of the operation of the eject portion. In the figure, 1 is a group of operation push buttons, 1e is a stop/eject button, 2 is a lock plate, 2a...2d is a locking piece, 4a, 4b, 4c are each travel control lever, 5
a', 5b', 5c'' are projections, 21 is an eject lever, 21a' is a lock portion, 23 is a receiving portion, 25 is an engagement groove, 26 is an oblique oblong hole, 27 is a groove, 28 is a power switch, Reference numeral 29 is a protrusion that serves as an operating section of the power switch.

Claims (1)

[Scope of utility model registration request] A cassette holder, an eject operation button, a traveling operation lever, a power switch, a lock portion that locks the cassette holder, an operation portion of the power switch, and an engaging portion that engages with the projections and recesses when the eject operation button is pressed. an eject lever having an inclined elongated hole formed therein and inclined at a predetermined angle with respect to the operation direction of the eject operation button; and a shaft that is inserted into the inclined elongated hole and supports the eject lever so as to be slidable and rotatable. , and a receiving portion serving as a rotational fulcrum for the ejector lever, and the ejector lever is rotated in a first direction about the receiving portion as a fulcrum by operation of the traveling operation lever, thereby controlling the operating portion of the power switch. Even when the power switch is turned on, the locking state of the cassette holder is maintained by the locking portion provided near the rotational fulcrum, and when the engaging portion is engaged with the concave and convex portions by pressing the eject operation button, the cassette holder is pressed. A tape recorder characterized in that the cassette holder is released from the set lock of the cassette holder by the locking portion of the cassette holder by being supported by the shaft and rotating and sliding in a direction opposite to the first direction.