JPH0643865Y2 - Auto-reverse type tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is an auto-reverse type tape recorder using a tape recorder substrate in which a synthetic resin main substrate is sandwiched between metal first and second sub substrates. Regarding

(Prior Art) As a conventional tape recorder substrate, (1) one composed of one metal plate (2) one composed of one synthetic resin plate (3) part of one metal plate It is known that each is constructed by attaching a synthetic resin plate to the upper surface.

(Problems to be Solved by the Invention) Among these conventional techniques, the one of (1) requires mounting screws or the like for mounting many movable parts on the substrate, and therefore,
The number of parts and assembly man-hours increase.

In point (2), since all the shafts can be molded integrally with the board, it has the advantage of reducing the number of parts and the number of assembly steps, but on the other hand, the plate thickness is reduced to compensate for mechanical weakness. Therefore, the thickness of the tape recorder must be increased, which is disadvantageous in reducing the overall thickness of the tape recorder.

Further, the item (3) has the advantages and disadvantages of the items (1) and (2) half by half, and can reduce the number of parts and the assembly man-hour to some extent, but it is still unsatisfactory in reducing the thickness of the entire tape recorder. It was something.

In particular, in an auto-reverse type tape recorder, since many moving parts are common, consideration was given to arranging multiple boards in parallel at intervals to increase the part mounting area. It was more difficult to reduce the thickness.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an auto-reverse type tape recorder which can reduce the number of parts and the number of assembling steps and can be easily thinned.

(Means for Solving the Problems) In order to achieve the above object, the auto-reverse type tape recorder of the present invention has a synthetic resin main main substrate made of a metal
The main board is sandwiched by sub-boards, and a bottomed recess is formed on the upper surface of the main board to accommodate a pair of reel gears. Of the constant speed rotation transmission gear and the high speed rotation transmission gear are respectively supported by the supporting arms rotatably provided on the first sub-board, and the first sub-board supports each pinch roller. A support shaft pivotally supporting the pair was erected, and a plurality of plate-like levers were inserted in a gap between the main board and the second sub-board so as to be movable back and forth along a guide formed on the main board. It is characterized by that.

(Function) In the auto-reverse type tape recorder, many movable parts must be attached to the board, but a bottomed recess for accommodating a pair of reel gears is formed on the main board made of synthetic resin, and each pair of constant speeds is formed. A space for accommodating the rotation transmission gear and the high-speed rotation transmission gear is formed by penetrating the plate thickness of the main board, and a plurality of plate-shaped operation levers are provided in the gap between the main board and the second sub board. Since it is inserted so that it can move back and forth along the guide formed on the board, it is possible to omit the mounting screws for mounting the multiple plate-shaped operating levers forward and backward, thus reducing the number of parts and the number of assembly steps. be able to.

Moreover, since the synthetic resin main substrate is reinforced by being sandwiched between the first and second metal sub substrates, a predetermined strength can be maintained.

Further, since the reel gear is housed in the bottomed recess provided on the main board, and the constant speed rotation transmission gear and the high speed rotation transmission gear are housed in the space provided on the main board, respectively, from the top surface of the main board of these gears. The amount of protrusion of can be suppressed to zero or a slight amount. As a result, the position of the reel receiver can be lowered, and the tape recorder as a whole can be made thinner. Further, the support shaft of the pinch roller support is made of a metal first
It can be firmly attached to the sub-board.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. First
FIG. 1 is a perspective view of an auto-reverse type tape recorder equipped with the substrate of the present invention, and FIG.
Is a substrate and includes a main substrate 2 made of synthetic resin, and first and second sub-substrates 3 and 4 made of metal having a small plate thickness.

The main board 2 is provided with a reel gear, a capstan and other parts to be described later, and has a sufficiently thin plate as a whole.

The first sub-board 3 is attached with a support shaft of a pinch roller support, which will be described later, and is fixed by being superposed on a part of the upper surface of the main board 2.

The second sub-board 4 is fixed so as to overlap a part of the lower surface of the main board 2, and a gap is partially provided between the main board 2 and the second sub-board 4, and in the gap, Various plate-like operation levers described later are inserted along a guide provided on the main board 2 so as to be movable back and forth.

The main board 2 has a first part in the front side of the substantially middle part in the front-rear direction.
And a plurality of screws 5 ₁ sandwiched by the second sub-boards 3 and 4.
By co-fastening with 5 ₅ it is reinforced.

On the rear upper surface of the main board 2, as shown in FIG.
a and 6b are arranged symmetrically, and reel receivers 70a and 70b provided with reel gears 7a and 7b at the lower ends of the reel shafts 6a and 6b,
A rotation detecting member 8a, which is arranged below each reel gear 7a, 7b,
It is rotatably supported with 8b. Each rotation detection member 8
Springs 9a, 9b, 10a and 10b are provided at the central portions of a and 8b. The reel gears 7a, 7b and the rotation detecting members 8a, 8b are housed in bottomed recesses 71a, 71b provided in the main board 2, and the lower ends of the reel shafts 6a, 6b are reel receivers 70a, 70b and reel gears 7a, 7b.
b, the rotation detection members 8a, 8b and the bottom portions of the space portions 71a, 71b are penetrated to protrude to the lower surface side of the main board 2, and the protruding end portions are fitted with the retaining members 11a, 11b. Also, small cylindrical protrusions 12a, 12b integrally formed on the left and right of the upper surface of the main substrate 2 on the front side.
Idler gear support arms 13a, 13b are rotatably attached to the outer periphery of the idler gear support arms 13a, 13b.
Idler gears for constant speed rotation transmission (constant speed rotation transmission gears) 14a, 14b are rotatably supported on shafts (not shown) on the bottom surface of the end of b, and by attaching the retaining members 15a, 15b to these shafts. The idler gears 14a and 14b are prevented from coming off. Each idler gear 14a, 14b is composed of a pair of large and small gears, and the small gear located on the upper surface side is within the range of the plate thickness in the space portions 72a, 72b penetrating the plate thickness of the main board 2 and opening. Housed in. The idler gear support arms 13a and 13b are prevented from coming off by a head mounting plate 16 which is arranged so as to overlap therewith. Further, a motor switch 17 is attached to the lower surface of one side of the main board. This motor switch 17
Is pushed by a switch actuating member 51, which will be described later, which slides to the right in association with reproduction, fast-forwarding and rewinding operations, and switches from off to on. Since the first sub-board 3 arranged on the upper surface side of the main board 2 is slightly larger than the second sub-board 4 on the lower surface side, it is also attached to the main board 2 by screws 25 ₁ and 25 ₂ . . Pinch roller supports 20a, 20b are rotatably attached to the support shafts 18a, 18b attached by caulking or the like on the left and right of the upper surface of the first sub-board 3 via torsion springs 19a, 19b. These pinch roller supports 20
Pinch rollers 21a and 21b are rotatably supported by the rotating ends of a and 20b. Further, the rotating ends of the pinch roller supports 20a, 20b are engaged with the pressing springs 22a, 22b attached to both ends of the head attaching plate 16. A plate-shaped operating lever 23 for constant speed operation is integrally formed at the front end of the head mounting plate 16, and the magnetic head 24 is taped integrally with the head mounting plate 16 by pressing the plate-shaped operating lever 23. It can be moved to the playback position and can be fed at a constant speed. One ends of the torsion springs 19a, 19b are in contact with the idler gear support arms 13a, 13b to urge the idler gear support arms 13a, 13b to rotate in one direction. The other ends of the torsion springs 19a, 19b are attached to the mounting shafts 12a, 1 of the main board 2.
It comes into contact with an oilless metal (not shown) that supports the center shafts 61a and 61b of the flywheels 60a and 60b, which are provided on the 2b and is described later. It flows to the substrate 3. The static electricity that has flowed to the first sub-board 3 flows from a mounting foot portion 42a of a switch mounting bracket 42 described later to the ground side of an electric circuit (not shown). In addition,
The ground terminal (not shown) of the magnetic head 24 may be connected to the mounting foot portion 42a of the switch mounting bracket 42.

Further, a tape running direction manual switching operation member 27 for manually switching the tape running direction is rotatably supported on a support shaft 26 mounted by caulking or the like on one side of the upper surface of the first sub-board 3. The tape traveling direction manual switching operation member 27 is biased in one direction by a spring 28. Between the first sub-board 3 and the main board 2, left and right high speed rotation transmission gears 29a, 29b are rotatably arranged. This high-speed rotation transmission gear 29a,
29b is composed of a pair of large and small gears, and the small gear located on the upper surface side is a space portion 73a, 73 which penetrates the main substrate 2 and opens.
It is housed in b. Further, a tape running direction switching plate 30 for automatically switching the tape running direction is arranged between the first sub-board 3 and the main board 2. The tape traveling direction switching plate 30 has one end engaged with the tape traveling direction manual switching operation member 27 and the other end engaged with the head signal changeover switch 31.

A cassette guide shaft 32a integrally formed on the upper surface of the main board 2,
The reference numeral 32b projects above the first sub-board 3, and the head mounting plate 16 is mounted on these cassette guide shafts 32a, 32b so as to be slidable forward and backward. A tape guide member 33 is provided on the upper surface of the head mounting plate 16. The tape guide member 33 has columnar parts 35a and 35b on the upper surfaces of both ends of the horizontal wall 34.
And the tape guides 36a and 36b are integrally provided on one side surface of the columnar portions 35a and 35b. The tape guide member 33 is attached to the head attachment plate 16 with screws 37a and 37b screwed into the columnar portions 35a and 35b. The magnetic head 24 is mounted on the horizontal wall 34 of the tape guide member 33 via a leaf spring 38 with screws 39a and 39b. By tightening these screws 39a, 39b, the leaf spring 38 is elastically deformed, and the repulsive force prevents loosening of the screws 39a, 39b. Further, the magnetic head 24 can be adjusted to an arbitrary height position with respect to the head mounting plate 16 and azimuth can be adjusted by the tightening degree of the screws 39a and 39b. At first glance, it seems difficult to adjust the height of the magnetic head 24 with respect to the head mounting plate 16, but while the tape is running, it is easy to adjust the height of the magnetic head 24 according to the height of the tape. Can be set to. As a result, when the magnetic head 24 is attached to the head mounting plate 16 in the related art, the spacer that is interposed between the magnetic head 24 and the head mounting plate 16 according to the height of the head becomes unnecessary. One end of a tape-shaped flexible printed circuit board 40 is attached to the magnetic head 24.
A head signal changeover switch 31 and a mounting bracket 42 so as to cover the switch 31 are attached to the other end of the switch via a plate 41. The mounting foot portion 42a of the mounting bracket 42 is mounted on the upper surface of the first sub-board 3 with screws 43. A short-axis flat tubular rubber 44 is fitted on the protrusion 16a protruding from the head mounting plate 16, and the rubber 44 and the other side surface of the column portion 35b of the tape guide member 33 (on the side opposite to the tape guide 36b). A part of the flexible printed circuit board 40 is sandwiched and fixed between it and the surface). As a result, the elastic force of the rubber 44 causes a part of the printed circuit board 40 to be constantly pressed against the one columnar portion 35b of the tape guide member 33.
0 is reliably held, and damage to the conductive portion of the printed board 40 is prevented. The head mounting plate 16 is biased in two directions by a spring 45. That is, one end is a direction in which the head mounting plate 16 is in close contact with the main substrate 2 because one end of the spring 45 is hooked to the second sub-substrate 4 below the main substrate 2, and the other is magnetic. This is a direction in which the head 24 is separated from the tape cassette.

Between the second sub-board 4 attached and fixed to the lower surface of the main board 2 and the main board 2, plate-like operation levers 46a, 46b for high-speed operation and a plate-like stop operation lever 47 are slidably arranged. Each of these operating levers 46a, 46b and 47 has springs 48a, 48b and 49
Is biased in one direction by. Each operating lever 46a, 46b,
47 is reciprocally supported by attaching the second sub-board 4 to the first sub-board 3 via the main board 2.
The second sub-board 4 has its one side edge in the width direction bent at a right angle, and the bent part reinforces the second sub-board 4 itself. In addition, the main substrate 2 includes the first and second
Since it is sandwiched by the sub-boards 3 and 4, it is reinforced and the molding strain of the main board 2 itself is corrected. Also,
On the lower surface of the second sub-board 4, a plate-like locking lever 50 and a plate-like switch actuating lever 51, which are overlapped with each other, are provided on the sleeves 52a,
52b and screws 53a, 53b are slidably arranged. These screws 53a and 53b are fitted in the sleeves 52a and 52b, penetrate the fitting holes of the second sub-board 4 and the main board 2 and
It is screwed into the screw hole of the sub-board 3. A spring 54 is attached to the lower surface of the second sub-board 4. Locking member
Reference numeral 50 is for locking each of the plate-shaped operation levers 46a, 46b for high speed operation except for the stop operation lever 47 in a predetermined operation mode. The switch operating lever 51 turns on the motor switch 17 in the tape running mode (playback, fast-forward and rewind mode). A metal motor mounting bracket 55 is provided with screws 56a and 56b on one side of the lower surface of the main board 2.
Mounted on the top of this bracket 55 with a motor 57
Are attached with screws 58a and 58b. This motor 5
A motor pulley 59 is attached to the shaft of 7. Second
A pair of flywheels 60a, 60b are rotatably arranged on the lower surface of the sub-board 4. These flywheels 60a,
The center axis (capstan) 61a, 61b of the 60b passes through the fitting holes 62a, 62b of the second sub-board 4 and is attached to the mounting axis 1 of the main board 2.
Fitted in the center holes of 2a, 12b and protruding upward, washers 63a, 63b and retaining members 64a, 64b are fitted to these protruding ends. In addition, 65a and 65b in FIG. 2 are flywheels 6.
Small diameter gears formed at the base ends of the center shafts 61a, 61b of the gears 0a, 60b mesh with the idler gears 14a, 14b. Then, the idler gear support arms 13a, 13b rotate in the direction of the center of the main board 2, the idler gears 14a, 14b mesh with the reel gears 7a, 7b, and the flywheels 60a, 60b rotate via the idler gears 14a, 14b. Is transmitted to the reel shafts 6a and 6b. One ends of the idler gear support arms 13a and 13b are engaged with the tape running direction switching plate 30, and when the tape running direction switching plate 30 moves left and right, the idler gear supporting arms 13a and 13b rotate in the left and right directions, respectively. To do. Therefore, when one idler gear is transmitting the rotational force to the reel shaft, the other idler gear is separated from the reel shaft and the rotational force is not transmitted. Also, 66a and 66b are
The central shafts 61a, 61b are located on the upper surfaces of these small diameter gears 65a, 65b.
The washer, 67, is fitted on both flywheels 60a, 60
It is an endless belt that is looped over b, the motor pulley 59, and the idler pulley 68. The idler pulley 68 is rotatably mounted on a mounting shaft 69 on the lower surface of one corner of the main board 2.

(Advantages of the Invention) As described above, according to the tape recorder of the present invention, the mounting screws for mounting the plurality of plate-shaped operation levers so that they can move back and forth can be omitted, and the number of parts can be reduced.

Moreover, since the synthetic resin main substrate is reinforced by being sandwiched by the metal first and second sub substrates, the conventional tape recorder substrate composed of one synthetic resin plate or the upper surface of the metal plate is synthesized. Even if it is thinner than the conventional tape recorder substrate in which only resin plates are stacked, a predetermined strength can be maintained.

Further, in a conventional tape recorder substrate in which a synthetic resin plate is simply laminated on the upper surface of a metal plate, gears such as a reel gear, a constant speed rotation transmission gear and a high speed rotation transmission gear must be attached to the upper surface of the synthetic resin plate. However, in the present invention, the reel gear is housed in the bottomed recess provided on the main board, and the constant speed rotation transmission gear and the high speed rotation transmission gear are housed in the spaces provided on the main board, respectively. The amount of protrusion from the upper surface of the substrate can be suppressed to zero or a slight amount. As a result, the position of the reel receiver can be lowered, and the tape recorder as a whole can be made thinner.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a perspective view showing the components of a tape recorder, and FIG. 2 is an exploded perspective view of the same. 1 ... Substrate, 2 ... Main substrate, 3 ... First sub-substrate, 4 ...
Second sub-board, 7a, 7b ... Reel gear, 14a, 14b ... Idler gear for constant speed rotation transmission (constant speed rotation transmission gear), 18a, 18
b …… Support shaft, 20a, 20b …… Pinch roller support, 21a, 21
b …… Pinch roller, 23 …… Plate-shaped operating lever for constant speed operation, 29a, 29b …… Gear for high-speed rotation transmission, 30 …… Tape running direction switching plate, 46a, 46b… Plate-shaped for high-speed operation Operating lever, 47 …… Plate-shaped stop operating lever, 61a, 61b …… Central shaft (capstan), 70a, 70b …… Reel receiver, 71a, 71b…
… Recesses with bottoms, 72a, 72b, 73a, 73b… Spaces.

Claims (2)

[Scope of utility model registration request] 1. A tape recorder substrate formed by sandwiching a part of a synthetic resin main substrate (2) between metal first and second sub substrates (3, 4) and a reel gear (7a) at the lower end. , 7b) equipped with 1
A pair of reel receivers (70a, 70b), a pair of capstans (61
a, 61b), a pair of pinch roller supports (20a, 20b) pivotally supporting the pinch rollers (21a, 21b), and the capstans (6).
1a, 61b) each pair of constant speed rotation transmission gears (14a, 14b) and high speed rotation transmission gears (29a, 29b) for transmitting the rotation to the respective reel gears (7a, 7b) are attached, and constant speed operation is performed. Plate operating lever (23), a pair of high speed operating levers (46a, 46b), plate operating lever (4)
7), and a tape running direction switching plate (30) and the like, which are movably attached, the auto-reverse type tape recorder, wherein the pair of reel gears (7a, 7a, 7a, 7a, 7a
a bottomed recess (71a, 71b) for accommodating b) is provided, and the pair of constant speed rotation transmission gears (14a, 14b) and the high speed rotation transmission gear penetrate the plate thickness of the main board (2). (29a, 29b)
To form a space (72a, 72b, 73a, 73b) for accommodating each of them, and a supporting arm (13a, 13b) rotatably provided on the main board (2) is provided with the constant speed rotation transmission gear (14a, 14b) and high-speed rotation transmission gears (29a, 29b), respectively, and support shafts (18a, 18) erected on the first sub-board (3).
Each pinch roller support (20a, 20b) is pivotally supported on b), and a plurality of plate-like operation levers (46a, 46b, 47a, 47b) are attached to the main board (2) and the second sub-board (4). An auto-reverse type tape recorder, characterized in that it is inserted in a gap between the main substrate (2) so as to be movable back and forth along a guide formed on the main substrate (2). 2. The auto-reverse type according to claim 1, wherein the space for accommodating each of the pair of constant speed rotation transmission gears and high speed rotation transmission gears is an opening formed through the main substrate. Tape recorder.