JPS6412020B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a cassette type tape recorder, particularly to an operating section thereof.

Conventional configurations and their problems In recent years, cassette tape recorders have become smaller, thinner, and more individualized based on market needs. Many types of stereo players have been commercialized.

Generally, when using this type of cassette type tape recorder, a cassette tape is loaded into the main body of the device, and operation buttons such as a play button and a fast forward button are then operated to drive the tape. In this case, a cassette holder section (hereinafter referred to as the holder section) into which the cassette tape is mounted and a section in which various operation buttons are arranged (hereinafter referred to as the operation section) are separated. For this reason, when the main body of the device is miniaturized to the point that it approaches the size of the cassette, the area on the top surface other than the holder section becomes extremely small, so if the operation buttons are placed here, each operation button will become too small. , resulting in poor operability. Therefore, some devices have no choice but to place the operating section on a surface other than the top of the holder, such as on the side or back of the tape recorder, but it is difficult to see the cassette tape inside the holder and the operating section at the same time. It was a bad thing. Additionally, tape recorders with an operation section on the back side had the disadvantage that they were difficult to operate when placed on a desk or the like.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems, and provides a compact and easy-to-operate cassette-type tape recorder in which the operation of running the tape can be performed on the upper surface of the holder part with a simple structure. With the goal.

Structure of the Invention The cassette tape recorder of the present invention has a see-through window through which the cassette tape can be seen, and a keyboard switch for constant-speed playback of the cassette tape, on the top surface of the lid that covers the cassette tape mounted on the reel stand. and a high-speed running unit that operates a transmission mechanism means provided inside the reel stand so as to be able to transmit a high-speed running operation command in the reel axis direction to perform an operation for high-speed running, and the regeneration operation section is provided close to the outside of the high-speed travel operation section, and the protrusion dimension from the top surface of the lid to the pressing plane of the regeneration operation section is equal to the protrusion dimension from the top surface of the lid to the pressing plane of the high-speed travel operation section. It is characterized by being smaller than the dimensions.

DESCRIPTION OF EMBODIMENTS FIGS. 1 and 2 are external perspective views of a cassette tape recorder according to an embodiment of the present invention, and FIGS.
4 is a sectional view taken along the line AA, FIG. 5 is a sectional view taken along the line BB, and FIGS. 6 and 7 are sectional views of the reel stand drive section for explaining the operation.

1 is the main body of the tape recorder, and 2 is a holder portion for storing a cassette tape. A see-through window 3 made of a transparent member is provided on the upper surface of the holder part 2, and when the cassette tape is attached, the display label of the cassette tape and the running state of the tape can be seen through the see-through window 3. .
Further, the back side of the peripheral edge 4 of the transparent window 3 is printed with silk printing or the like, making it opaque. Note that many methods can be applied to form this opaque portion, such as pasting an opaque sheet and surface roughening such as sandblasting. Further, a holder body 2a for holding a cassette tape is fixed to the inside of the holder portion 2.

As shown in FIG. 2, the tape recorder main body 1 includes a forward rotation capstan 5a and a reverse rotation capstan 5.
b, tape running system parts such as a forward rotation pinch roller 6a, a reverse rotation pinch roller 6b, tape guides 7a and 7b, and a magnetic head 8 are respectively arranged. Although not shown, pinch rollers 6a, 6b for normal rotation and reversal, tape guides 7a, 7b,
A protective cover is attached to the top of the magnetic head 8. Further, inside the tape recorder main body 1, a mechanical section for running the tape and an electric section for driving the tape running and signal amplification are housed.

On the top surface of the holder part 2, there are a group of operation buttons: a forward run playback button 11, a reverse run playback button 12, and a fast forward button 1.
3. A rewind button 14 is provided. These operation button groups will be explained in detail using FIGS. 4 to 7. Reference numeral 16 denotes a button guide having a through hole in the center thereof, and is fitted into the periphery of the hole 15 formed in the see-through window 3. Insert the normal rotation regeneration button (hereinafter referred to as regeneration button) 11 into the through hole of this button guide 16 from the back side, lock the large diameter part of the regeneration button 11 on the periphery of the button guide 16, and move the regeneration button 11 upward. It has a structure that prevents it from coming off. Furthermore, a keyboard switch 18 having electrical contacts 18a and 18b is placed on the back side of the button guide 16 by inserting a conductive and elastic movable contact piece 17, and the button is pressed while the movable contact piece 17 and the electric contact 18a are in contact with each other. The keyboard switch 18 is fixed to the back surface of the holder part 2 by heating and welding the protruding shaft protruding from the guide 16. With this configuration, when the playback button 11 is pressed, the protrusion 11a at the lower end of the playback button 11 deflects the movable contact piece 17, and the electrical contacts 18a and 18b of the keyboard switch 18 are connected via the movable contact piece 17.

19 is a lead wire that connects the keyboard switch 18 to an electric circuit, and in order to miniaturize the entire tape recorder, a flexible printed wiring board is used to connect the keyboard switch 18 to the electric circuit.
They are arranged as shown in FIG. An opaque portion is formed on the peripheral edge 4 of the transparent window 3 by silk printing or the like, and the lead wire 19 is fixed by adhesive along this opaque portion to the back of the holder portion 2. This lead wire 19 is connected to the holder part 2.
It is routed in an unfixed state from near the hinge at the back of the
Utilizing the flexibility of the flexible printed wiring board, the battery 20 is connected from the top of the storage section through the rear part of the mechanism section to a printed circuit board 21 disposed at the bottom of the housing. With this configuration, when the holder part 2 is opened and closed by the hinge, the unfixed part of the lead wire 19 moves slightly, and rotation of the holder part 2 is not hindered and strong tension is not applied to the lead wire 19.

Also, a part of the holder body 2a (metal body) fixed inside the holder part 2 is arranged below the lead wire 19, so that the cassette tape does not touch the lead wire 19 when the cassette tape is attached or removed. There is no need to worry about disconnections, etc.

Note that the reversing travel regeneration button 12 side also has the same configuration as the regeneration button 11 side. Further, 29 is a stop button.

Next, the fast forward button 13 is inserted into the hole 23 formed in the transparent window 3 from the back side of the holder part 2, and the
Button guide 24 provided integrally with transparent window 3 on the periphery of 3
This prevents it from coming out upwards. Then, after inserting the spring 25 into the back side of the fast forward button 13,
A fast forward button holding member 26 formed in a ring shape is fixed to the back surface of the see-through window 3 using an ultraviolet curable adhesive (UV adhesive method) or the like to prevent the button 5 from falling. At this time, the lower protrusion 27 of the fast forward button 13 is attached to the holding member 2.
It is provided so as to face the hole 28 of No. 6. With this configuration, when the fast forward button 13 is pushed in against the biasing force of the spring 25, the lower protrusion 27 passes through the hole 28 and presses the head of the reel stand. Also play button 11
and the fast forward button 13 are provided close to each other. Note that the rewind button 14 side has the same configuration as the fast forward button 13 side.

Here, since the playback button 11 activates the keyboard switch 18 provided at the bottom to obtain the operation mode, the pressing operation stroke is very small. In comparison, the fast forward button 13 has a large pressing operation stroke because it obtains an operation mode by pressing the head of the reel stand and lowering the reel stand. For this reason, the play button 11 can be operated even if its pressing plane has a small area, but compared to this, the fast forward button 13
The pressing plane has a relatively large area to facilitate operation.

Furthermore, as described above, since the pressing operation stroke of the regeneration button 11 is small, if some object comes into contact with the top surface of the holder part 2 in a flat manner, the regeneration button 11 may be pressed slightly by mistake, causing a malfunction. There is a risk. In order to prevent this, in this embodiment, the protrusion dimension from the top surface of the holder part 2 to the pressing plane of the playback button 11 is configured to be smaller than the protrusion dimension from the top surface of the holder part 2 to the pressing plane of the fast forward button 13. This prevents the playback button 11, which has a small protruding dimension, from malfunctioning due to the object coming into contact with the fast forward button 13 when the object comes into contact with the upper surface of the holder part 2 in a plane.

Furthermore, since it is possible that an object may come into contact with the playback button 11 locally, in this embodiment, the dimensions are set so that the pressing plane of the playback button 11 does not protrude beyond the top surface of the button guide 16 to prevent malfunction of the playback button. are doing.

Incidentally, the relationship between the reverse run playback button 12 and the rewind button 14 is also configured in the same manner.

On the other hand, in FIGS. 6 and 7, a reel stand 30 is rotatably attached along the outer periphery of a boss 32 provided on a substrate 31. Further, the reel stand 30 integrally has two gears 33 and 34 having different diameters at its lower part. 35 is a shaft that passes through the inside of the boss 32 and is slidable in the axial direction with respect to the boss 32. A compression spring 36 is inserted between the lower step of the boss 32 and the lower surface of the reel stand 30, and exerts an elastic force in a direction to separate the reel stand 30 from the base plate 31.

A locking portion 37 is attached to the upper end of the shaft 35 by screwing or the like to determine the upper end position of the reel stand 30 which is urged upward by a compression spring 36. On the other hand, a conical portion 35b is provided at the lower end of the shaft 35 via a small diameter portion 35a. Further, a switch 39 is provided on the substrate 31 so that the contact portion 38 faces the tip of the conical portion 35b.

On the other hand, two rotatable gears 41 and 42 are pivotally supported on a shaft 40 formed on a boss fixed to the substrate 31. These two gears 41 and 42 are frictionally connected by a felt 43 inserted between them and a spring 44 pressed against one end of the shaft 40. In addition, the gear 41 is connected to the reel stand 30 as shown in FIG.
The gear 42 meshes with the gear 33 of the reel stand 30 only when the reel stand 30 is pushed down, and the gear 42 meshes with the gear 34 of the reel stand 30 only when the reel stand 30 is not pushed down, as shown in FIG. It is located.

Reference numeral 45 denotes a locking plate slidably held along the base plate 31, and biased by a weak spring 46 in the direction of the conical portion 35b at the lower end of the shaft 35.

Further, 47 is a control circuit, and 48 is a drive circuit that drives the motor 49 based on commands from the control circuit 47.

The operation of the tape recorder configured as above will be explained below. First, FIG. 6 shows the stopped state. In this state, the reel stand 30 has a spring 36
, and the shaft 35 is in the upper position. Therefore, the contact 38 of the switch 39 is in an open state. Further, the gear 42 is in mesh with the gear 34, and the gear 43 and the gear 33 are in a non-meshing state. In this state, the motor 49 is not driven and the reel stand 30 does not rotate.

Next, the reproduction operation will be described. First, when the operator presses the reproduction button 11, the protrusion 11a of the reproduction button 11 bends the movable contact piece 17, and the contacts 18a and 18b of the keyboard switch 18 are electrically connected. This command is transmitted to the control circuit 47, and further to the drive circuit 48.
The motor 49 is driven through the motor 49. As a result, the gear 41 obtains rotational force and rotates the frictionally coupled gear 42. Furthermore, the gear 34 meshing with the gear 42
As the magnetic tape rotates, the reel stand 30 is driven at a speed corresponding to the reproduction time and winds up the magnetic tape.

Next, to explain the fast-forwarding operation, first, when the operator pushes the fast-forwarding button 13 against the biasing force of the spring 25, the lower protrusion 27 contacts the head of the reel stand 30 through the hole 28 and pushes it downward. Press down. As a result, the reel stand 30 and the shaft 35 slide together inside and outside the boss 32 and descend. Then, as shown in FIG. 7, the gear 34 and the gear 42 are disengaged, and the gear 33 and the gear 41 are engaged. Further, the conical portion 35b at the lower end of the shaft 35 presses the contact portion 38 of the switch 39 to close it.

At this time, the locking plate 45 biased by the spring 46 is once displaced to the right in the figure along the outer surface of the conical portion 35b, and then the tip of the locking plate 45 is attached to the small diameter portion 35b.
5a and is held in that state by a spring 46. That is, the shaft 35 is locked in the downwardly pressed state by the locking plate 45 in the state shown in FIG.

As described above, the contact portion 38 of the switch 39 is in the closed state due to the action of the locking plate 45, and the gear 33 and the gear 4 are in the closed state.
1, the contact portion 38 is maintained in an engaged state.
The output of the control circuit 47 is inputted to the control circuit 47.
The output of 7 switches a signal system circuit (not shown) to a predetermined state, drives the motor 49 via the drive circuit 48, transmits force to the gear 41, and drives the gear 3.
Rotate 3. That is, the reel stand 30 is rotated at high speed to perform fast-forward winding of the tape. Although not shown, the rewinding operation by the rewinding button 14 is also exactly the same.

According to the above embodiment, forward rotation, reverse rotation playback button 1
1, 12, the fast forward button 13 and the rewind button 14 are arranged on the top surface of the holder part 2, so that even when the tape recorder main body is downsized to the point that it approaches the size of a cassette, each operation button can be easily operated on the tape recorder. There is no need to place them on the side or back, and there is no need to make the operation buttons smaller, making them easier to operate.

In addition, a see-through window 3 provided on the top surface of the holder part 2 allows the tape running state such as the tape running direction within the cassette tape to be seen through, and the see-through window 3 allows forward rotation, reverse run, playback buttons 11, 12, fast forward button 13, and winding. Since the return button 14 is arranged, the position of the operation button can be checked at the same time as checking the running direction of the tape, etc., so that there is no possibility of making a mistake in operation, and the device has good operability.

In addition, a keyboard switch is used for the forward and reverse playback buttons 11 and 12, and the fast forward button 13 and rewind button 14.
By adopting a mechanical switching mechanism for operating the reel stand, the main operation buttons can be concentrated on the top surface of the holder part 2, and switching between playback running and fast forward speed can be done by sliding the reel stand 30 up and down. This can be implemented with a simple configuration in which the gears 33 and 34 integrally provided on the reel stand 30 are engaged with and disengaged from the gears 41 and 42 provided coaxially on the board 31, and the ratio of the number of teeth of the meshing gears is changed. can.

Also, the lead wire 19 of the keyboard switch 18
is an opaque portion 4 provided at the periphery of the back surface of the transparent window 3.
Since it is adhesively fixed to the cassette tape, it is not visible from the top surface of the transparent window 3. On the other hand, a part of the metal holder body 2a is arranged below the lead wire 19, so when the cassette tape is attached or removed, this cassette tape There is no possibility of damage caused by hitting it. This lead wire 19 is fixed to the back of the holder part 2, and the part introduced into the device from near the hinge part is in an unfixed state, so when the holder part 2 is opened and closed, this unfixed part moves slightly. , there is no risk of interfering with opening/closing or breaking of the lead wire 19.

Effects of the Invention The present invention has a see-through window through which the cassette tape can be seen on the upper surface of the lid that covers the cassette tape mounted on the reel stand, and a playback operation that operates a keyboard switch for constant speed running playback of the cassette tape. and a high-speed running operation unit that operates a transmission mechanism provided inside the reel stand so as to be able to transmit high-speed running operation commands in the reel axis direction to perform operations for high-speed running. Even if the recorder main body is reduced in size to approximately the same size as a cassette tape, each of the operating sections described above can be formed sufficiently large and operability can be improved. Furthermore, since the see-through window and the operation section are located on the top surface of the cassette holder, you can check the tape running status of the cassette tape while also checking the position of the main operation section on the same plane and performing operations, reducing the risk of erroneous operation. Improved operability. Furthermore, the regeneration operation section is provided close to the outside of the high-speed travel operation section, and the protrusion dimension from the top surface of the lid to the pressing plane of the regeneration operation section is the protrusion dimension from the top surface of the lid to the pressing plane of the high-speed travel operation section. By configuring the playback operation unit to be smaller than this, even if an object comes into contact with the flat surface of the lid, it is possible to prevent the playback operation unit from being pushed and malfunctioning. In addition, if you route the lead wires of the keyboard switch along the inner surface of the lid and form an opaque area by silk printing on the see-through window located above the lead wires, the lead wires can be seen from the outside and the appearance can be improved. Thus, the present invention can realize a compact cassette tape recorder with a simple structure and good operability.

[Brief explanation of the drawing]

1 and 2 are external perspective views of a cassette tape recorder according to an embodiment of the present invention, FIG. 3 is a top view of the same, FIG. 4 is a cross-sectional view taken along line A-A, and FIG. B sectional view, FIGS. 6 and 7 are sectional views of main parts for explaining the operation. 2...Cassette holder part, 3...See-through window, 4
... Peripheral section, 11 ... Normal rotation playback button, 12 ...
Reverse run playback button, 13... Fast forward button, 14... Rewind button, 16... Button guide, 18... Keyboard switch, 19... Lead wire, 30... Reel stand, 35... Shaft, 33, 34 ,41,42
...Gear, 39...Switch.

Claims (1)

[Scope of Claims] 1. A see-through window through which the cassette tape can be seen on the top surface of the lid covering the cassette tape mounted on the reel stand, and a playback operation for operating a keyboard switch for constant-speed running playback of the cassette tape. and a high-speed running operation unit that operates a transmission mechanism provided inside the reel stand so as to be able to transmit a high-speed running operation command in the reel axis direction to perform an operation for high-speed running, and the regeneration operation A portion is provided close to the outside of the high-speed travel operation portion, and a protrusion dimension from the top surface of the lid portion to a pressing plane of the regeneration operation portion is smaller than a protrusion dimension from the top surface of the lid portion to the pressing plane of the high-speed travel operation portion. A cassette-type tape recorder characterized by: 2. Claim 1, characterized in that the lead wire of the keyboard switch is routed along the inner surface of the lid part, and an opaque part is formed by silk printing or the like on the see-through window located above the routed lead wire. The cassette-type tape recorder described in Section 1.