JPS581878Y2 - Reciprocating type cassette tape recorder - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a reciprocating type cassette tape recorder, and its purpose is to prevent erroneous erasure of the tape.

An embodiment of this invention will be described with reference to FIGS. 1 to 3.

1, motor 2 and left and right reel stands 3,
4 and the like, and 5 is an upper substrate held by a spindle (not shown) provided on the lower substrate 1.

The left and right reel stands 3.4 are rotatably supported, pass through holes 5a and 5b of the upper substrate 5, and are engaged with the reel hub (not shown) of the cassette at the upper part thereof. It has reel drive parts 3a and 4a to do this.

Left and right idler rods 8 and 9 with left and right idlers 6.7 pivotally attached to them, respectively, are slidably disposed on the upper substrate 5, and these left and right idlers 6.7 are connected to the upper substrate 5. The direction in which the left and right capstans 12 and 13, which are also pivotally connected to the upper board 5, are brought into pressure contact with the left and right reel stands 3 and 4 by the left and right springs io and il, each of which has one end latched to the is being energized.

In addition, the left and right capstans 12 and 13 are the left and right capstans, respectively.
The right flywheel (not shown) is integrally formed, and the motor 2 and an endless belt (not shown) stretched between the left and right flywheels (not shown) rotate each other in opposite directions. It is configured to rotate in the direction.

Further, the left and right pinch roller arms 14 and 15 are rotatably attached to the upper substrate 5 by left and right shafts 16 and 17, respectively, and the left and right pinch rollers 18 and 19 are respectively attached to the left and right pinch rollers. It is rotatably mounted on left and right shafts 20, 21 arranged at one end of the roller arm 14, 15.

On the other hand, the recording/playback head 22 and the left and right erasing heads 23
．． A head board 25 on which parts 24 and the like are disposed is arranged on the upper board 5 so as to be able to move forward and backward with respect to the cassette 26, and when the regeneration operation member 27 is depressed, a spring 28 whose one end is fixed to the head board 25 is used to release the regeneration operation member 27. It is configured to move forward by coming into elastic contact with a shaft 29 provided in the operating member 27 and loosely passing through the through hole 5c of the upper substrate 5.

Note that this playback operation member 27 is biased in the direction of retreating from the cassette 26 by a spring (not shown).

Further, the left and right arm portions 25a of the head substrate 25.

25b engages with the ends 8a and 9a of the left and right idler rods 8 and 9, respectively, and the left and right idlers 6°7 engage with the left and right reel stands 3 and 4 and the left and right capstans 12, respectively.
．． 13, and left and right through holes 25c.

25d are left and right pinch roller arms 14.1, respectively.
One end 14b of the left and right pinch roller arms 14 and 15 engages with the lower pins 14a and 15a of the left and right pinch roller arms 14 and 15, respectively, with one end fixed to the head substrate 25 and the other end thereof.

Left and right pinch roller springs 30°31 engaged with 15b
The left and right pinch rollers 18.19 are configured to control the pressing of the left and right pinch rollers 18.19 onto the left and right capstans 12.13 in cooperation with the capstans 12.13 and 12.13, respectively.

Next, as shown in FIG. 2, between the head board 25 and the upper board 5, a resident switching rod 32, a switching arm 33,
The right/reverse selection rod 34 is arranged in the following configuration.

1. A spring 35 whose one end is locked to the right end 32a of the seven-tank switching rod 32a and whose other end is locked to the upper substrate 5.
Although the seven-tank switching rod 32 is biased to the right by
The shaft 36 established near the right end of the switch arm 33 is connected to the through hole 3 of the switching arm 33.
It is stabilized in the position shown in the figure by coming into contact with the right end portion 33b of 3a.

In addition, the shaft 37 established at the left end of the seven-way switching rod 32 is
A drive lever 39 pivotally connected to a shaft 38 established on the lower board 1
is engaged with one end 39a of.

Further, the other end 39b of this drive lever 39 is in contact with a cam portion 40a of a cam pulley 40 pivotally attached to the lower board 1.

Next, the switching arm 33 is pivotally connected to a shaft 41 established on the upper substrate 5, and a shaft 42 established at the upper end of this switching arm 33 is engaged with the right/reverse selection rod 34.

Further, two sloped portions 33c and 33d are formed at the left end of the through hole 33a of the switching arm 33.

Next, the seven selection rods 34b, the left and right elongated holes 34a
, 34b are pivotally supported by the left and right shafts 16, 17 and are attached to be slidable in the left-right direction.

The two sloped portions 34c and 34d provided on the seven-sided selection rod 34 rotate the left and right shafts 20° in order to prevent the left and right pinch rollers 18 and 19 from moving forward as the head substrate 25 moves forward, respectively. 21.

In addition, the upper slope portions 34e and 34f of the shed selection rod 34
are pins 8b and 9 of the left and right idler rods 8 and 9 to control the movement of the left and right idler rods 8 and 9, respectively.
It is configured to be able to engage with b.

Further, one end portion 44a of a lever 44, which is a switching member, is pivotally connected to a shaft 43 provided in the upper substrate 5, and is engaged with the through hole 34g in the center of the seven-panel selection rod 34.

Since this seven-tank selection rod 34 is provided with a click spring 45 whose one end is locked to the left end and the other end is locked to the upper substrate 5, the left and right elongated holes 34a and 34b are connected to each other. The first one whose right end is in contact with the left and right shafts 16 and 17, respectively.
Two stable positions are possible: a position in which the left-hand end rests on the left and right axes 16, 17, respectively.

- Left and right shafts 46 and 47 provided above the sumo wrestler board 5 are pivotally mounted with trident-shaped left and right claw detection members 48 and 49, and their first ends 48a.

49a are claw portions 26a of the cassette 26, respectively.

26b (see FIGS. 1 and 3), the second ends 48b and 49b of which correspond to the aforementioned lever 44.
The third end portions 48c and 49c are configured to be able to come into contact with the other end portion 44b, and the third end portions 48c and 49c are connected to a shaft 50 with one end established in the lower substrate 1.
It is configured to be able to engage with pins 51a and 51b that are provided on a control arm 51 that is pivotally connected to the upper substrate 5 and loosely pass through through holes 5d and 5e of the upper substrate 5.

The claw detection members 48 and 49 have ends 53a and 53b of a two-pronged spring 53 that is engaged with a shaft 52 provided at the upper center of the upper substrate 5, respectively, at first ends of the claw detection members 48 and 49. 48a.

49a, the first end 48a
, 49a are the claw portions 26a, 26b of the cassette 26, respectively.
(See FIG. 1 and FIG. 3).

In FIG. 3, reference numeral 54 denotes a recording blocking member, whose arms 54a and 54b (shown in FIG. 1) are held by the fixed holding parts 5f and 5g of the upper substrate 5 (
(shown in FIG. 1) is mounted rotatably around arm portions 54a and 54b, and its rear recessed portion 54c is rotated in the direction of the watch housing by a compression spring 55 whose one end is locked to the upper substrate 5. Forced.

Further, the central leg portion 54d of the recording blocking member 54 is configured to loosely pass through the through hole 5h of the upper substrate 5 and come into contact with the end portion 51c of the control arm 51.

Further, the tip end 54e of the recording blocking member 54 loosely passes through the through hole 51 of the upper substrate 5, and further loosely penetrates the through hole 56a of the recording operation member 56 that is slidably attached between the upper and lower substrates 5 and 1. are doing.

The control arm 51 is urged to rotate counterclockwise in FIG. 2 by a spring 57 whose one end is locked to the lower board 1.

The recording operation member 56 is configured so that when the button is pressed to the left as shown in FIG. 3, the electric circuit is switched to the recording state, and is operated together with the playback operation member 27 (shown in FIG. 1) The device is configured such that when the device is turned on, it is locked and held in the operating position by known means to enable predetermined recording.

The configuration of this embodiment is as described above, and its operation will be explained next.

FIG. 1 shows a state in which tape running is stopped when the forward/reverse selection rod 34 is switched to the forward path state. When the playback operation member 27 is suppressed from this state, the head board 25 moves forward and the tape travels to the left and right. Regarding the idler 6.7, the ends 8a and 9a of the left and right idler rods 8 and 9 and the left and right arms 25a and 25b of the head board 25 are disengaged, and the left and right pinch rollers are removed from the housing. For is and is, the lower pin 14a of the left and right pinch roller arms 14 and 15
, 15a and the left and right through holes 25c, 25 of the head substrate 25.
d becomes disengaged.

However, since the reversal switching rod 34 is on the left, the pin 8b of the left idler rod 8 engages with the upper slope portion 34e of the E reversal selection rod 34 as shown in FIG. The shaft 20 is inclined to the inclined portion 34c of the fertilizer selection rod 34, and as a result, the left idler 6 is prevented from being pressed against the left reel stand 3 and the left capstan 12.

On the other hand, it is pressed against the right reel stand 4 button and the right capstan 13, and the right pinch roller 19 is pressed against the right capstan 13, making it possible to play the forward path.

When the pulley 40 is rotated by a predetermined amount by an external operation or an operation of the internal drive system in the forward path regeneration state shown in FIG. It moves to the left against the biasing force of the spring 35.

At this time, the shaft 36 is connected to one slope 33d of the switching arm 33.
, the switching arm 33 rotates clockwise around the shaft 41 , and as a result, the shaft 42 moves to the right, so the anti-flooding selection rod 34 overcomes the click spring 45 and begins to move to the right, and the clinic spring 45 Due to the biasing force, the left ends of the left and right elongated holes 34a and 34b are moved rightward and stably held at position 1 where they abut the left and right shafts 16 and 17, respectively.

As a result, the left/right relationship between the left and right idlers 6.7 and the left and right pinch rollers 18.19 is reversed, and the regeneration state is changed from the forward path to the backward path.

In FIG. 1 and FIG. 2 (outbound state), the lever 44
The other end 44b presses the second end 49b of the claw detection member 49 against the biasing force of the two-pronged spring 53, so that the first end 49a of the claw 49 contacts the claw 26b of the cassette 26. are in a separated state, and the second end 48b of the claw detection member 48 is not engaged with the other end 44b of the lever 44.
The first end portion 48a is in a state where it can press against the claw portion 26a of the cassette 26.

Therefore, if the cassette 26 with the claw portion 26a on the forward side is mounted in the above state, the first end 48a of the claw detection member 48 is pressed by the claw portion 26a, and the claw detection member 48 is pressed by the claw portion 26a.
rotates clockwise, and the third end 48 of the claw detection member 48
c and the pin 51a of the control arm 51 are separated from each other, and as a result, the control arm 51 is rotated counterclockwise in FIG.
The end portion 51c presses the central foot portion 54d of the recording blocking member 54 against the biasing force of the compression spring 55, so that the recording blocking member 54 rotates at position 1 shown by the imaginary line in FIG.

At the position of this imaginary line, the tip 54e of the recording blocking member 54 is outside the through hole 56a of the recording operating member 56, so that the recording operating member 56 can be pressed.

On the other hand, when the cassette 26 without the claw portion 26a on the outward path side is loaded, the claw detection member 48 is at the position 11 shown in FIGS. 1 and 2, and the third end 48 of the claw detection member 4B
Since 11 c is engaged with the pin 51a of the control arm 51, the control arm 51 resists the biasing force of the spring 57 and
It is held in the position shown.

This state is shown by the solid line in FIG. 3, and the end 51c of the control arm 51 is in a position where it is not engaged with the central foot 54d of the recording blocking member 54, so that the recording operating member 56 is not engaged in this state. When pressed, the end of the through hole 56a comes into contact with the tip 54e of the recording blocking member 54, and the suppressing operation of the recording blocking member 56 is blocked.

Next, considering the recording operation during the return trip, when the button shown in FIG. 1 and FIG. The second end 49b of the detection member 49 and the other end 44b of the lever 44 are separated from each other, and the claw detection member 49 is rotated clockwise by the biasing force of the spring 53 to close the claw portion 26b of the cassette 26.
At the same time, the second end 48b of the pawl detection member 48 and the other end 44b of the lever 44 engage, and the pawl detection member 48 rotates counterclockwise against the biasing force of the spring 53. Since the cassette 26 is separated from the claw portion 26a of the cassette 26, the state is the same as that on the outward journey, and the same operation is performed by the same operation as on the outward journey.

Since this embodiment is configured in this manner, the following effects are produced.

(A) With a simple configuration, it is possible to reliably switch between tape running on the outbound and return trips.

When a cassette 26 that does not have a claw portion on the running side is mounted on either the outward or return trip, the recording operation becomes impossible, and the tape can be prevented from being erased accidentally.

(0) Regardless of whether the button is pressed on the outbound or return trip, recording operation is possible when the cassette 26 that has a claw on the running side is installed, regardless of the presence or absence of the claw on the non-travel side. When a cassette 26 that does not have a cassette 26 is installed, recording operation becomes impossible.

(D) Left and right pinch roller arms 14.15 holding left and right pinch rollers 18.19, respectively.
Since the right shafts 16 and 17 are also used as sliding support shafts for the forward/reverse selection rod 34, which is a selection member that selects the outbound and return travel, the left and right shafts are a problem when switching between the outbound and return travel. - Check the accuracy of the timing for switching the right pinch roller 18.19 to the left/right capstan 16.17.
Left and right pinch roller arms 14.15 left and right axes 1
6.17 can be easily increased compared to the case where the fertilizer selection rod 34 is supported by a different shaft.

Furthermore, the number of parts can be reduced. As described above, the reciprocating type cassette tape recorder of this invention has the effect of preventing erroneous erasure of the tape.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the stopped state while traveling on the outward route;
The figure is a plan view showing the reproduction state during forward travel, and FIG. 3 is a side view of the main part of the recording blocking member. 26...Cassette, 36a, 26b...
・Claw part, 44... Lever 4B, 49...
- Claw detection member, 51... Control arm, 54...
...Recording blocking member, 55...Recording operation member.

Claims (1)

[Scope of utility model registration request] A recording operating member that switches an electric circuit to a recording state in conjunction with a recording button, a recording blocking member that can take a first position that enables operation of the recording operating member and a second position that disables operation, and a cassette. A first and a second claw detection member which can be pressed against a pair of accidental erasure prevention claws and is always biased toward the accidental erasure prevention claws of the cassette, and which respond to the outward and return travel of the tape. During the outward trip, the first claw detection member is held in a state in which it does not pass through the position of the claw of the cassette, and during the return trip, the second claw detection member is held in a state in which it does not pass through the position of the claw in the cassette. When neither the switching member nor the first and second claw detection members pass through the position of the claw of the cassette, the recording blocking member is biased to the first position, and vice versa. and a control member that urges the recording blocking member to the second position when either the first button or the second claw detection member passes the position of the claw of the cassette. cassette tape recorder.