JPS6346957Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a framework device for a magnetic recording/reproducing machine, and particularly to a framework device incorporating a drive device for a cassette-type magnetic recording/reproducing machine.

[Technical background of the invention and its problems]

Conventionally, a cassette-type magnetic recording/reproducing machine has a first plate-shaped chassis with a plurality of protruding supports, and a second plate-shaped chassis that is screwed to the supports and arranged parallel to the first chassis. It is formed by assembling a mechanical drive mechanism such as a flywheel, a drive device consisting of an attached electric component such as a motor and a plunger, a magnetic head for recording and playback, etc. to a frame device formed into a frame shape. There are many things that are done.

By the way, the above drive device of the magnetic recording/playback machine is
The need to improve the running characteristics of the magnetic tape requires strict assembly precision, but as a prerequisite for this, a large number of supports are installed in order to increase the strength and precision of the frame device into which the drive device is installed and to obtain stability. In some cases, the sheet metal chassis was bent to provide support.

However, a framework device with this type of structure has a large number of supports, which makes it heavy and difficult to handle, and it is also large in size.Furthermore, there are many screw-fastening points, making it difficult to assemble. ,
Processing is troublesome because bending is required.

[Purpose of invention]

The present invention was devised in view of the above points, and aims to provide a framework device for a magnetic recording/reproducing machine that has sufficient strength and precision, is lightweight and compact, and is easy to assemble and process. It is something to do.

[Summary of the idea]

The framework device for a magnetic recording/reproducing machine of the present invention includes a plate-shaped first chassis in which a plurality of supports and substrate holders are implanted on the inner surface by outsert molding, and a plate-shaped first chassis that is screwed to the above-mentioned supports and attached to the first chassis. a second chassis arranged in parallel and having a substrate holder corresponding to at least one of the substrate holders of the first chassis implanted on the inner surface by outsert molding;
first and second printed wiring boards held between the first and second chassis by the respective board holders so as to be orthogonal to each of the chassis; It is characterized in that it is formed into a frame shape by the first and second printed wiring boards, and a magnetic recording/reproducing drive device is held inside.

[Example of the invention]

Hereinafter, one embodiment of the present invention will be described based on the drawings.

The drawing shows a so-called auto-reverse cassette-type magnetic recording and reproducing machine, in which a cassette tape is mechanically inserted into a chassis assembly 1 as a frame device formed in the shape of a frame. A magnetic recording/reproducing drive device 2 consisting of a drive mechanism and electric parts attached thereto is arranged.

The chassis assembly 1 includes a plate-shaped first chassis 6 in which a plurality of columns 3 and first and second board holders 4 and 5 are implanted on the inner surface by outsert molding, and a screw 7 is attached to the column 3. A third substrate holder 8 is screwed and arranged parallel to the first chassis 6, and a third substrate holder 8 corresponding to the second substrate holder 5 is implanted on the inner surface by outsert molding. 4, a second chassis 10 having a mounting piece 9 protrudingly provided at a position corresponding to the first chassis 10;
and a first printed wiring board 11 held between the second chassis 6 and 10 by the first board holder 4 and the mounting piece 9;
The second substrate holder 5 is placed between the chassis 6 and 10.
and a second printed wiring board 12 held by the third board holder 8, and these first and second chassis 6, 10, first and second printed wiring boards 11, 12 It is formed into a frame shape.

Further, as shown in FIGS. 2 to 4, a second chassis 1 located outside the chassis assembly 1 is provided.
A third printed circuit board 13 is connected to the second chassis 10 along the outer surface of the chassis 10 by a fourth board holder 14 implanted on the outer surface of the second chassis 10 by outsert molding.
is held parallel to the chassis 10 of.

The drive device 2 includes a gear (not shown) that rotatably drives a reel stand 21 rotatably protruding from the outer surface of the first chassis 6, and a gear (not shown) that rotatably drives a reel stand 21 rotatably provided on the outer surface of the first chassis 6. A first partially toothed gear 22 for selecting an operation mode, a second partially toothed gear 23 for auto-reverse drive, and two metal bearings 24 protruding from the first chassis 6 are rotatably inserted, respectively. first and second flywheels 27 and 28 having first and second capstan shafts 25 and 26, respectively; and the first chassis 6.
The first partially toothed gear 22, which is slidably provided at the center of the inner surface of the 22 is slightly rotated to engage the gear portion 30 of the first partially toothed gear 22 and the gear 31 attached to the first capstan shaft 25 of the first flywheel 27, and the first partially partially toothed gear 22 is rotated. A drive mechanism equipped with a sliding body 32 that provides a stiffness, a first motor 34 for recording and playback that rotates the flywheels 27 and 28 at a constant speed with a rubber belt 33, and a gear 35 that rotates the reel stand 21 at high speed. A second motor 36 for fast forwarding and rewinding is rotated, and a first engagement (not shown) whose one end is engaged with and disengaged from an engagement protrusion protruding from the first partially toothed gear 22 and whose central part is rotatably supported. a mode switching first plunger 37 that engages with the other end of the locking arm and rotates the first locking arm to release or stop rotation of the first partially toothed gear 22; Similarly to 37, it is comprised of electrical components such as a second plunger 39 for auto-reverse switching, which releases or locks the rotation of the second partially toothed gear 23 via a second locking arm 38. Each component of the drive device 2 is appropriately arranged within the chassis assembly 1.

As shown in FIG. 1, the first chassis 6 has a plurality of holes drilled in a rectangular iron plate, and is formed by outsert molding on the inner surface facing the second chassis 10 through the holes. In addition to the first and second substrate holders 4, 5 and the plurality of supports 3,
A plurality of component holders 41 for holding these components and bearings (not shown) are implanted in the arrangement of each component of the drive device 2. The first and second substrate holders 4 and 5 are installed on both sides of the first chassis 6 in the longitudinal direction, respectively. In addition, the first chassis 6 on which the second substrate holder 5 is implanted
A plurality of lever holders 42 are arranged in parallel on one side by outsert molding. Further, a cassette holder 44 for holding a cassette half 43 is implanted on the outer surface of the first chassis 6 by outsert molding. Further, screw holes 45 are formed at the tips of each of the above-mentioned pillars 3, respectively.

As shown in FIG. 6, the second chassis 10 has a plurality of holes drilled in a rectangular iron plate, and the inner surface facing the first chassis 6 is provided with holes through the holes.
By outsert molding, in addition to the third board holder 8, support holders 51 that correspond to and hold the respective pillars 3, and parts of the component holders 41 that hold the first motor 34 are formed. Holder 4
1, a first motor holder 52 that crimply supports the first motor 34, and each of the component holders 41
Among them, a second motor holder 54 that corresponds to the component holder 41 that holds the second motor 36 and holds the bearing portion 53 of the second motor 36, and each capstan shaft 25, 2 of each of the flywheels 27, 28.
Each capstan shaft 2 abuts on the base end of 6.
A capstan bearing 55 for preventing the metal bearings 5 and 26 from coming off from the metal bearing 24, and a presser bar 56 whose tip abuts against the sliding body 32 are installed.

The pillar holder 51 has a screw hole 58 drilled in the center of a disc portion 57 that corresponds to the screw hole 45 of the pillar 3, and three engagements around the screw hole 58 that hold the outer periphery of the pillar 3. A protrusion 59 is provided in the vicinity of the third substrate holder 8,
The third board holder 8 utilizes the engagement protrusion 59 of the column holder 51.
The second printed wiring board 12 is held between the two. Further, the first motor holder 52
A plate spring part 60 is provided along the second chassis 10, and a support rod 61 is provided protruding from the tip of the plate spring part 60, the tip of which comes into contact with the first motor 34. The holder 54 has an engagement protrusion 63 protruding from a disc portion 62 that holds the outer periphery of the bearing portion 53 of the second motor 36 .

Note that there is no strut holder 51 corresponding to the strut 3 provided at the corner of the first chassis 6, and this strut 3 is screwed through a screw hole 64 drilled at the corner of the second chassis 10. Ru.

Also, a mounting piece 9 of the second chassis 10 corresponding to the first substrate holder 4 of the first chassis 6 is provided.
is formed into a substantially L-shape, as shown in FIG.
A screw hole 65 is formed at the tip.

The second chassis 10 is shown in FIG.
As shown in FIG. 3, they are arranged parallel to the first chassis 6 by screws 7 which are screwed into the threaded holes 45 of the pillar 3 through the screw holes 58 of the pillar holder 51.

The first printed wiring board 11 is a circuit board for recording and reproducing, and is connected to a magnetic head (not shown) provided on the outer surface of the first chassis 6 using a lead wire, and has a rectangular shape and is approximately at the center. Part 2 above
A locking hole corresponding to the screw hole 65 of the mounting piece 9 of the chassis 10 is bored, and a first connector 71 for connecting to an external electric circuit is provided on one side. The other side of the first printed wiring board 11 is held by the first board holder 4 of the first chassis 6, and the center part is attached to the mounting piece 9 of the second chassis 10 through the locking hole. Each chassis 6,
It is held between each chassis 6 and 10 so as to be perpendicular to the chassis 10.

The second printed wiring board 12 is a circuit board provided with drive circuits for each of the motors 34 and 36 and each plunger 37 and 39, and a detection circuit for detecting the type of cassette tape and whether recording has been completed or not.
Each of the above motors 34, 36 and each plunger 3
7, 39 with lead wires,
Multiple detection switches 81 formed by two leaf springs
are arranged in parallel, and a second connector 82 for connecting to an external electric circuit is provided on one side. and,
The second printed wiring board 12 is held on the other side by the second board holder 5 of the first chassis 6, and on one side is held by the third board holder 8 of the second chassis 10. is held between each chassis 6 and 10 so as to be perpendicular to each other. At this time, one end of the detection switch 81 engages with the information setting part of the cassette half 43 held in the cassette holder 44, and the center part engages with the lever holder 42 of the first chassis 6 so as to be rotatable. It comes into contact with the other end of the inserted detection lever 83, and is opened and closed by rotation of the detection lever 83 to determine the type of cassette tape.

The third printed wiring board 13 is a recording/playback circuit board similar to the first printed wiring board 11, and has a rectangular shape and has a third connector connected to the first printed wiring board 11 on one side. 91 are provided, and are arranged parallel to the second chassis 10 with both sides and the center thereof being held by the fourth substrate holder 14 .

Then, the drive device 2 is assembled according to the following procedure.

First, before assembling, check the detection switch 81, each connector 71, 82, 91, each motor 34, 36, each plunger 37, 39,
Electrical parts such as magnetic heads are mounted on each printed wiring board 1.
1, 12, and 13 directly or via lead wires.

Next, gears for rotating the reel stand 21, toothless gears 22, 23, flywheels 27, 28, sliding bodies 32, and motors are mounted on the component holders 41 and bearings formed on the inner surface of the first chassis 6. 34,3
6 and each plunger 37, 39, and the first and second
The first and second printed wiring boards 11 and 12 are mounted on the board holders 4 and 5. At this time, since the mounting direction of each component and each printed wiring board 11, 12 is limited to one direction toward the inner surface of the first chassis 6, the mounting operation is easy.

Then, each column holder 51 is made to correspond to each column 3 of the first chassis 6, and the second chassis 10 is mounted and fixed with the screws 7. Then, the first and second motors 34 and 36 are held between the respective chassis 6 and 10 by the first and second motor holders 52 and 54, and the sliding body 32 is held by the presser bar 56.
The first partially toothed gear 22 is held down so that it does not come off the cam 29, and the second printed wiring board 1
2 is held by second and third substrate holders 5 and 8 and sandwiched between respective chassis 6 and 10.

Further, the center part of the first printed wiring board 11 is fixed to the mounting piece 9 of the second chassis 10 with a screw 72, and while being connected to this first printed wiring board 11 with a third connector 91, a third The printed wiring board 13 is attached to a fourth board holder 14 embedded in the outer surface of the second chassis 10.

The first and second chassis 6, 10 are arranged in parallel with each other via each support 3, and the first and second printed wiring boards 11, 12 are arranged between each chassis 6, 10. , 10 so that each chassis 6, 1
0. A strong frame-like chassis assembly 1 is integrally formed as a frame device by each support 3 and each printed wiring board 11, 12.

Furthermore, since the drive mechanism and electrical components of the drive device 2 are held between the first and second chassis 6, 10 by the respective holders 41, 51, 52, 54, the capstan bearing 55, and the presser bar 56, the drive The device 2 is held in place without the use of screws or other fasteners.

Further, each printed wiring board 11, 12, 13 is connected to a first chassis 6, a second chassis 6, which incorporates a drive device 2,
10, the wiring distance of the lead wires can be extremely short, and there is no need for many lead wires to extend from the mechanical unit.

Furthermore, since each printed wiring board 11, 12, 13 can be wired in advance before assembling the drive device 2, each printed wiring board 11, 12, 13,
13 is easy to assemble, and each chassis 6, 1
When the drive device 2 held between 0 and 0 is further assembled into the main body of the device, connection with other electric circuits is made by the first and second connectors 71 and 82, and no soldering work using lead wires is required.

[Effect of idea]

According to the present invention, the first and second chassis are arranged perpendicularly to each chassis by the substrate holder between the first and second chassis arranged in parallel via the support.
Since it is formed into a frame shape with several printed wiring boards, it is reinforced by each printed wiring board, the number of supports is minimized, and sufficient strength and precision can be obtained without bending each chassis. I can do it.

Furthermore, since the number of columns can be reduced, the device can be made lighter and smaller, and at the same time as the number of columns is reduced, there are also fewer places to screw onto the columns, making assembly easier.

Further, since each chassis does not require bending, processing is easy.

[Brief explanation of the drawing]

The figures show one embodiment of the device of the present invention, and Fig. 1 is a front view with the second chassis removed;
2 is a right side view, FIG. 3 is a left side view, FIG. 4 is a longitudinal sectional view of the central portion, FIG. 5 is a plan view, and FIG. 6 is a front view of the second chassis. 3... Support column, 4, 5, 8... Board holder, 6...
...First chassis, 10...Second chassis, 1
1... First printed wiring board, 12... Second printed wiring board.

Claims (1)

[Claims for Utility Model Registration] A plate-shaped first chassis with a plurality of supports and board holders implanted on the inner surface by outsert molding, and a plate-shaped first chassis that is screwed to the above-mentioned supports and arranged in parallel with the first chassis. a second chassis having a substrate holder corresponding to at least one of the substrate holders of the first chassis embedded in the inner surface by outsert molding; Therefore, the first and second printed wiring boards are held perpendicularly to each of the chassis, and the first and second chassis and the first and second printed wiring boards form a frame body. 1. A framework device for a magnetic recording/reproducing machine, characterized in that it is formed as follows.