JPS5853713Y2 - tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a tape recorder that is equipped with a forward head and a reverse head and is programmable (manual reverse).

In tape recorders with forward and reverse heads, when in record mode, the program (manual reverse) can be programmed, for example by inadvertently pressing the program button.
may be performed.

Such a malfunction in the recording mode is undesirable because the recording is shifted from the A side to the B side, preventing normal recording on the A side, and unnecessary recording is made on the B side.

In particular, in the case that necessary music, etc. has already been recorded on the B side, in order to avoid the risk of irreparable inconvenience, the present inventor made it possible to program only in playback mode and disable programming in recording mode. devised by.

For example, in connection with the operation for setting the recording mode, programming in the recording mode can be disabled by turning off a switch in the plunger drive circuit or by locking the program button so that it cannot be suppressed.

However, the former requires a switch, and the latter requires a locking mechanism for the program button, both of which increase the number of parts and are undesirable in terms of cost and space.

In particular, the latter has the disadvantage that it tends to be structurally complicated due to its locking mechanism.

The purpose of this invention is to provide a tape recorder with a simple configuration that does not allow programming in the recording mode without increasing the number of parts.

Embodiments of this invention will be described in detail below with reference to the drawings.

In the embodiments, this invention is disclosed as a tape recorder in which the recording mode and the playback mode are set by raising a movable chassis on which reels, capstans, etc. are installed, but it goes without saying that the invention is not limited to this type of tape recorder. Nor.

In FIG. 1, a movable chassis 12 of a tape recorder 10 is shown.
is placed in a downward resting position by a mooring mechanism (not shown).

Here, the movable chassis 12, on which the capstan 14, reel shafts 15, 16, etc. are set, is rotatably attached to the fixed chassis 20 by a pair of rotary pins 17, 18.

A pinch roller 22, a recording/playback head 24, and an erasing head 26 are installed on the fixed chassis 20.

Since the movable chassis 12 is biased upward by the compression coil spring 27, it can be moved upward by pressing, for example, with a cassette tape (not shown), an unmooring knob (not shown) that releases the mooring at the stop position. , second
You can set the state in which recording and playback are possible as shown in the figure.

As shown in FIGS. 1 to 3, particularly FIG. 3, the erasing head 26 on the stationary chassis 20 is fixed to a support arm 28, which is screwed to a head mounting plate 30.

The head mounting plate 30 is rotatably attached to the fixed chassis 20 by a pivot pin 32.

Additionally, a torsion spring 34 is wrapped around the pivot pin 32 to bias the head mounting plate 30 toward the stop 36.

A record operating member 38 is slidably attached to the fixed chassis 20.

As can be clearly seen from Fig. 3, this record operating member 3
8 has long grooves 42 and 43 on the top and side surfaces, into which pins 40 and 41 fixed to the fixed chassis 20 are loosely fitted and snapped together.

In addition, the record operating member 38 is moved in a direction away from the fixed chassis 20 by a tension coil spring 48 stretched between a pin 46 fixed to a support piece 44 protruding from the fixed chassis 20 and the record operating member 38 It is biased towards the front (front).

Furthermore, a notch 50 is formed on the upper surface of the record operating member 38, and the supporting arm 28 of the erasing head 26 is connected to the head mounting plate 3.
The lower end of the screw 52 that screws into the hole extends into this notch.

Therefore, when the record operating member 38 is slid forward by the tension spring 48 until the pins 40 and 41 come into contact with the rear sides of the long grooves 42 and 43, the screw 52 is pressed by the edge of the notch 50.

Therefore, the head mounting plate 30 is rotated around the rotation pin 32 in a direction away from the stopper 36 against the biasing force of the torsion spring 34.

In this state, the erasing head 26 retreats to a position away from the tape running path and does not come into contact with the tape.

Further, a notch 54 is formed on the side surface of the record operating member 38 to allow the movable chassis 12 to descend.

゛As shown in FIGS. 1 to 3, a pin 56 that functions as a protruding locking member protrudes from the side surface of the record operating member 38, and a pair of notches that function as a locking groove are provided at the upper end of the side surface of the movable chassis 12. 58°59 is formed.

Of these notches 58 and 59, the notch 58 on the front side of the tape recorder is formed when the record operating member 38 is protruded by the biasing force of the tension spring 48, that is, when the pins 40, 4
1 is formed to be located below the pin 56 when it comes into contact with the rear side of the long groove 42, 43.

Further, the notch 59 on the back side is formed so as to be located below the pin 56 when the pins 40, 41 slide to the pushed-in position where they abut the front sides of the long grooves 42, 43.

Further, a program switch such as a microswitch 60 for changing the tape running direction is attached to the side surface of the record operating member 38.

When the record operating member 38 slides to the protruding position, the microswitch 60 moves within the stroke range of a program button 62 attached to a case (not shown) and can be pressed by the program button. .

Notches 58, 5 corresponding to two positions of a protruding locking member such as a pin 56 attached to the sliding record operating member 38
A locking groove like 9 is formed on the upper end of the side surface of the movable chassis 12, and the rear notch 58 is connected to the front notch 5 for recording mode.
9 is configured for playback mode.

Therefore, if the movable chassis 12 is raised at the protruding position of the record operating member 38, the pin 56 will move into the notch 59.
It is inserted and locked inside.

Further, when the movable chassis 12 is raised in the push-in position where the record operating member 38 is pressed against the biasing force of the tension spring 48, the pin 56 is inserted into the notch 59 and locked.

In this way, when the pin 56 is locked in either of the notches 58 and 59, the record operating member 38 is fixed and prevented from sliding, so there is no room for malfunction of the record operating member, and the recording state or The regeneration state can be maintained reliably.

Release of the pin 56 from the notch 58,59 is facilitated by pressing the movable chassis 12 downward.

Further, a head mounting plate 30 on which the erasing head 26 is arranged is rotatably attached to the fixed chassis 20, and a torsion spring 34 is wound around the rotation pin 32 of the head mounting plate 30.
is biased toward the stopper 36.

When the head mounting plate 30 comes into contact with the stopper 36, the erasing head 26 is positioned facing the tape running path so that it can come into contact with it.

A notch 50 is formed in the upper surface of the record operating member 38, into which a screw 52 protruding from the head mounting plate 30 is inserted.

Here, if the record operating member 38 is in the protruding position, the edge of the notch 50 contacts the screw 52 and rotates the head mounting plate 30 against the biasing force of the torsion spring 34, thereby retracting the erasing head 26. This makes contact between the erasing head and the tape impossible.

Therefore, the record operating member 38 is in the protruding position and the pin 5
In the reproduction mode in which the tape 6 is locked in the notch 59, the erasing head 26 does not operate at all, completely preventing erasure of the tape due to malfunction during reproduction.

As described above, according to this invention, a microswitch 60 for switching the tape running direction is attached to the record operating member 38.

In the recording mode in which the record operating member 38 is pushed in and the pin 56 is locked in the notch 58, this microswitch 60 is located outside the stroke range of the program button 62, so the program button 62 malfunctions in the recording mode. does not touch the program button even when pressed.

Therefore, even if the program button 62 is pressed inadvertently, the microswitch does not operate, the program state cannot be set, and normal recording continues.

In this invention, by attaching the program switch to the record operating member, the program button is not locked, and the program switch is prevented from operating in the recording mode, making programming impossible.The number of parts does not increase, and the structure is simple. You can get a tape recorder.

[Brief explanation of drawings]

The drawings show one embodiment of this invention; FIG. 1 is a perspective view of the main part of the tape recorder with the movable chassis in the lowered position, FIG. 2 is a perspective view of the main part of the tape recorder in the recording mode, and FIG. FIG. 2 is a partially enlarged view of FIG. 2; 10... tape recorder, 12... movable chassis,
20...Fixed chassis, 26...Erasing head, 34
...Torsion spring, 38...Record operation member, 48
...Tension coil spring, 50...Top surface notch, 52.
...screw, 56...pin, 58.59...notch,
60...Micro switch, 62...Program button.

Claims (1)

[Scope of utility model registration request] In a tape recorder equipped with a forward head and a reverse head, a program switch is slidably attached to the movable chassis and is used to set the recording mode. Therefore, by attaching it to the record operating member that is pressed further back than in the playback mode and retracting the program switch out of the stroke range of the program button in the record mode, it is possible to program in the playback mode, and to program in the record mode. A tape recorder characterized by being disabled.