JPH0434219B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates in particular to small cassette tape players.

(Prior Art) Small, easily portable cassette tape players (hereinafter abbreviated as players) have become widespread. This type of player is particularly required to be small, compact, lightweight, and inexpensive due to its intended use, and in recent years, players that are smaller than the cassette tape itself have come into practical use.

Conventionally, such a miniaturized player includes a player main body 2 and a wrist 3 rotatably supported at one end by the player main body 2, as shown in FIG. 5, for example. is provided with a capstan shaft, and the other Rit 3 is provided with a pinch roller. And Rituto 3
It can be played by opening the cassette tape C, inserting the cassette tape C, closing the cartridge 3, and operating the play mode button.

In particular, in conventional players, the pinch roller (and head) is mounted on the support plate on the lit side.
This support plate is further connected to the play mode button via a link mechanism, so that the support plate and the play mode button are linked. This allows the pinch roller and the capstan shaft to be separated by at least a predetermined width until the cassette tape is set in the rim and closed relative to the player body, so that the tape can enter the running path reliably and easily.On the other hand, when playing When you press the play mode button, the support plate moves in conjunction with this, and as a result, the head comes into contact with the tape surface, the pinch roller also comes into contact with the capstan shaft with the tape in between, and the electrical switch is also turned on. The capstan shaft and take-up reel stand rotate.

(Problems to be Solved by the Invention) However, conventional players have the following problems.

First, the operating system has a play mode button and a pinch roller that are mechanically linked. In other words, a support plate, a link mechanism, etc. are required, making the operation system extremely complicated, and it is not possible to achieve the small size, compactness, weight reduction, and cost reduction required for this type of player. There are problems such as an increased likelihood of failure.

Second, the mechanical connection between the play mode button and the pinch roller limits the placement position of the play mode button.
Moreover, since the play mode button is limited to a type in which the button is pressed with a certain stroke, the operation system becomes even larger. Incidentally, a touch switch or the like using a solenoid plunger or the like has been put into practical use, but the reality is that it cannot meet the demands of this type of player in terms of cost reduction, miniaturization, etc.

Therefore, the present invention eliminates these conventional problems and provides a cassette tape player that is smaller, lighter, and significantly less expensive, is less likely to break down, and has a play mode button layout that is more flexible and significantly simpler. This is what we intend to provide.

(Means for Solving the Problems) The present invention particularly provides a player body 2 as shown in the drawings.
The player main body 2 is rotatably supported at one end and is provided with a rim 3 for setting a cassette tape C, a capstan shaft 4 is arranged on the player main body 2, and a pinch roller 5 is arranged on the rim 3. It is applied to a cassette tape player 1, and its features include an arm member 6 having an intermediate portion pivotally supported on the cartridge 3, a pinch roller 5 being pivotally supported at one end of the arm member 6, and a pinch roller 5 being pivotally supported at the other end of the arm member 6. cam follower 7
A contact portion 10a is provided which contacts the front end of the cassette tape 10 via an elastic member 10. On the other hand, a cam portion 8 with which the cam follower portion 7 engages is provided on the player body 2, and the shape of the cam portion 8 is , the pinch roller 5 and the capstan shaft 4 are separated from each other when the wrist 3 is open, and the pinch roller 5 and the capstan shaft 4 are pressed together with a predetermined pressing force by a cassette tape when the wrist 3 is closed. It is in.

(effect) Next, the operation of the present invention will be explained.

First, the cassette tape C is inserted and set inside the rim 3 with the rim 3 in the open position.
In this case, the cam follower 7 is pushed toward the cassette tape C side by the cam section 8, and as a result, the pinch roller 5 is moved to a position opposite to the cassette tape C side, that is, at a position away from the capstan shaft 4. It is displaced to. Therefore, when the ribbon 3 is closed in this state, the tape T is reliably inserted between the capstan shaft 4 and the pinch roller 5. On the other hand, at the time when the lid is almost completely closed, the pinch roller is pressed against the capstan shaft 4 with the tape T sandwiched therebetween due to the cam action of the cam part 8, the pressing action of the cassette tape C, and the elastic action of the elastic member 10, and Apply the set pressing force. In addition, cassette tape C
If there is no pressing action of the cassette tape T, the pinch roller 5 will have a certain amount of play with respect to the capstan shaft 4, and deformation of the pinch roller 5 can be prevented. Further, when the lid 3 is closed, the cassette tape C is positioned and fixed by a cassette tape post or the like on the player body 2 side. Therefore, to operate the play mode, turn the electric switch 9.
It is sufficient just to turn it on, and now the tape T can be run.

(Example) Below, preferred examples according to the present invention will be described in detail with reference to the drawings.

First, in order to make the present invention more clear, the overall structure including the external appearance of the player will be described with reference to FIGS. 5 to 8. 5 is a side view of the player according to the present invention with the lid opened, FIG. 6 is a perspective view of the same player with the lid closed, FIG. 7 is a rear view of the player, and FIG. 8 is a side view of the player with the lid closed. 7
It is a sectional view taken along the line - in the figure.

The player designated by reference numeral 1 includes a player body 2 and a lid 3 rotatably supported on both sides of the rear end of the player body 2, and the lid 3 can be opened and closed by raising and lowering its front edge.

The player main body 2 has a built-in battery, a drive system, and a circuit system, and has a take-up reel stand 11 and a supply reel stand 12 on the left and right sides relatively toward the front on its top surface 2a, and a capstan relatively toward the rear left. Axis 4 (3rd
Figure).

On the other hand, when paying attention to the cartridge 3, its front surface is opened and becomes a cassette insertion section 3a, and this insertion section 3a
The cassette tape C can be set in the lit 3 by inserting it parallel to the surface of the lit 3. Therefore, a cassette insertion guide is provided on the inner surface of the lit 3 to guide insertion of the cassette tape. Incidentally, when the cassette tape C is set in the lit 3, a part of the cassette tape C is exposed to the outside as shown in FIG.

Further, a transparent window 13 is provided in a part of the lit 3 so that the remaining amount of the filled cassette tape C, etc. can be visually observed. Furthermore, as shown in FIG. 6, a pinch roller 5, a head 14, and a tape guide 15 are disposed on the inner surface of the ribbon 3 from the left, which will be described in detail later. Furthermore, a lit stopper 16 is provided on the inner surface of the lit 3, and when the lit 3 is closed, the stopper 16 clicks onto the upper end of the supply reel stand 12 to prevent the lit 3 from opening.
figure).

Incidentally, positioning when loading the cassette tape C is as follows. First, in the vertical direction, as shown in FIG. 8, a notch is provided in the upper surface 2a of the player main body 2 to form a leaf spring-shaped pressing piece 17 that is slightly raised upward. A cassette tape C is held between the cartridge and the cartridge 3. In particular, the cassette tape C is pressed against the lit 3 side to which the head 14 is attached for accurate positioning. Further, positioning in the front and back direction is performed by inserting a cassette guide post 18 provided on the player body 2 into a guide hole provided in the cassette tape C, and also by each reel stand 11, 12.

On the other hand, an operation panel 30 is provided on the back of the player 1, as shown in FIG. On this panel 30 are a headphone jack 31 and a volume control knob 3.
2. A fast forward button 33 and a play mode switch 9 are respectively arranged. In particular, the play mode switch 9 is simply an ON-OF switch with electrical contacts.

Next, the main structure of the present invention will be explained with reference to FIGS. 1 to 5. FIG. 1 is a plan view of the pinch roller device and the vicinity of the head device, FIG. 2 is a front view of the same, FIG. 3 is a left side view of the same, and FIG. 4 is a partial perspective view of the tape guide.

First, the pinch roller device will be explained. The device, designated by reference numeral 40, is supported by a support shaft 41 fixed to the inner surface 3b of the rim 3. The device 40 includes an arm member 6, which includes an arm body 42 and a coil spring 43 that engages with the arm body 42. The arm body 42 includes an intermediate portion 42a bent to have a U-shaped cross section and this intermediate portion 42.
Upper and lower pinch roller support plate parts 42b and 42c integrally extended to the right from the upper and lower plate parts of a, and the other,
It consists of a dowel forming part 42d integrally extending leftward from the vertical plate part of the intermediate part 42a. A pinch roller 5 is rotatably attached to a support shaft 44 installed between each support plate part 42b and 42c, and a hemispherical bulge is formed near the tip of the dowel forming part 42d from the front side to the rear side. A dowel 45 is formed, and this dowel 4
5 is the cam follower section 7.

A bearing hole 46 is formed in the upper and lower plate portions of the intermediate portion 42a of the arm body 42, and the bearing hole 46 is rotatably supported on the support shaft 41. In addition, the intermediate portion 42
A coil spring 43 is fitted into the support shaft 41 between the upper and lower plate parts of a, and one end of this coil spring is inserted into the elongated hole 42e formed in the upper plate part of the intermediate part 42a.
At the same time, the other end extends toward the dowel 45 side, and a rod-shaped tonga pin 47 is fitted into the front end bent forward. Note that the spring 43 acts to urge the trigger pin 47 forward. For this purpose, a spring guide portion 44 bent upward is formed in the lower plate portion of the intermediate portion 42a, and the spring 43
The other end is locked and it is restricted so that it can only be displaced within a certain range. Therefore, when the trigger pin 47 is pushed rearward, the arm body 42 rotates about the support shaft 41, and the pinch roller 5 is displaced forward. Note that, due to the action of the spring 43, the trigger pin 47 is elastically coupled to the arm body 42 in the right rotation direction.

Further, reference numeral 48 denotes a position regulating pin integrally molded with the rim 3, and is provided protruding from the rear of the intermediate portion 42a with a certain clearance, and this clearance is made such that it is created slightly when the rim 3 is opened, for example. Prevents unnecessary rattling. This clearance is about 0.6 mm in the example.

Note that, as shown in FIG. 3, the dowel forming portion 42d is formed with a cue button attachment portion 42g integrally extending upward, and this attachment portion 42g is provided with an attachment hole 42h. And the Kyu button shaft 5 with a groove formed on the front part.
The front end of the button shaft 50 is locked in the mounting hole 42h, and the rear end of the button shaft 50 extends rearward, penetrates the back surface of the rim 3, and is exposed to the outside. Therefore, Kyu button axis 5
The part exposed to the outside of 0 becomes the cue button 33, and when this cue button 33 is pushed in during the play mode, the dowel forming part 42d is displaced and the pinch roller 5
can be moved away from the capstan shaft 4 to enter the fast forward queue mode. And Kyu button 3
When the pressure 3 is released, the spring 43 returns to the original position.

On the other hand, on the upper surface 2a of the player main body 2, a cam portion 8 is provided oppositely to the rear of the dowel 45. The front surface of this cam portion 8 becomes a cam surface 61, and the dowel 45 is arranged so as to come into contact with this cam surface 61. The cam surface 61 consists of a first cam surface 62 of approximately 1/4 circle from the upper end to the front end, and a second cam surface 63 that is concave backward in a dogleg shape from the front end. To explain the function of the cam part 61, first, the first cam surface 62 displaces the dowel 45 forward when the lid 3 is opened, and separates the pinch roller 5 from the capstan shaft 4 (for example, by about 1.5 mm). ), but
The second cam surface 63 is attached to the dowel 45 when the lid 3 is closed.
Allows for backward displacement. Then, by pressing the cassette tape C, the dowel 45 enters the second cam surface 63, and the pinch roller 5 comes into pressure contact with the pinch roller shaft 4. At this time, the distance between the dowel 45 and the second cam surface 63 is a small distance of about 0.2 mm.

Next, the head device will be explained.

A head device 70 is located on the right side of the pinch roller device 40. First of all, the inner surface 3 of Ritsuto 3
4b has a pair of left and right mounting columns 71, 72 protruding downward, and the mounting columns 71, 72 have a head 1 on the upper surface.
4 is fixed on the head support plate 73 with screws 74 and 75.
Install by. In this case, one mounting column 71
, the other mounting post 72 is made shorter than the mounting post 71, and the other mounting post 72 is completely fixed with the screw 74.
A spring 76 is compressed and tightened between the support plate 73 and the support plate 73. Thereby, by rotating the screw 75, the inclination of the head 14, that is, the azimuth adjustment can be performed. In this way, the head 14 will be fixed to the lit 3.

On the other hand, further to the right of the head device 70, a tape guide 15 is provided which is integrally formed on the inner surface of the ribbon 3. As shown in FIG. 4, this tape guide 15 has a U-shaped guide recess 81 in which the tape T enters and regulates the vertical direction at the front end.

Next, the usage method and functions will be explained.

First, assume that the lid 3 is opened as shown in FIG. In this case, the dowel 450 engages with the first cam surface 62 as shown by the imaginary line in FIG. 3, and the pinch roller 5 is in a position away from the capstan shaft 4.

Next, the cassette tape C is inserted through the insertion section 3a of the cartridge 3. As a result, the front end of the cassette tape C comes into contact with the trigger pin 47 and acts in the pushing direction, but since the cam portion 8 and the dowel 45 engage, the pinch roller 5 maintains its position.

Next, when the rim is closed while pressing the cassette tape C, the dowel 45 slides along the first cam surface 62, but the action of the first cam surface 62 causes the pinch roller 5 to close until the rim 3 is closed. remains in its current position. That is, since the pinch roller 5 and the capstan 4 are in a separated state, the tape T can be interposed between them reliably and smoothly.

Then, when the lid 3 is closed (or just before closing), the dowel 45 is displaced rearward by the action of the second cam surface 63, and the pinch roller 5 comes into contact with the capstan shaft 4 with the tape T in between. By the way, the stroke until the pinch roller 5 comes into contact with the capstan shaft 4 is shorter than the stroke of the trigger pin 47 when the cassette tape C is loaded. Therefore, due to the pressing action of the cassette tape C, the spring 43 is contracted by the difference between the respective strokes, and is applied to the pinch roller 5 as an elastic force. This pinch pressure is about 140 g to 180 g, and the pinch roller 5 comes into pressure contact with the capstan shaft 4.

When the lid 3 is closed, the tape T comes into contact with the head 14 and enters the guide recess 81 of the tape guide 15.

Therefore, when the play mode switch 9 is turned on, the electric system is energized, the capstan shaft 4 and the take-up reel stand 11 are rotated, and the cassette tape C is played back. Furthermore, as described above, pressing the cue button 33 during playback allows fast-forward cue playback. Furthermore, when taking out the cassette tape C, the above-mentioned procedure may be reversed.

Note that when the cassette tape C is not set and the rim 3 is closed, that is, when it is not in use, there is no pressing action on the cassette tape C, so the pinch roller 5 has a certain amount of play with respect to the capstan shaft 4, and the pinch roller 5 There is no problem such as permanent plastic deformation of the roller 5.

In the above description, the cassette tape of the cassette tape player referred to in the present invention is a broad concept that includes audio tapes, video tapes, etc., and the player is a broad concept that includes not only playback but also recording and recording functions.

Furthermore, the present invention is not limited to the above embodiments. For example, the cam portion may be provided as a rim, and the cam follower portion may be provided on the main body. Further, the spring 43 can be replaced with other elastic means or can be omitted. Furthermore, although the present invention has been applied to the case where the pinch roller is arranged in a cartridge, it can also be applied to a format in which the pinch roller device according to the present invention is disposed in the player body and a cassette tape is attached to the player body. be able to.

(Effects of the Invention) As described above, the player according to the present invention includes an arm member having an intermediate portion pivotally supported on the wrist, a pinch roller being pivotally supported at one end of the arm member, and a cam follower at the other end. A contact part is provided which contacts the front end of the cassette tape via the cassette tape and an elastic member, and a cam part is provided on the player body with which the cam driven part engages, and the shape of the cam part is adjusted to the position where the rim is open. Since the pinch roller and the capstan shaft are separated from each other, and the pinch roller and the capstan shaft are pressed against each other by the cassette tape at the closed position of the lid, the following remarkable effects can be obtained.

The operating system can be extremely simplified, eliminating the need for relatively large support plates and link mechanisms like in the past.
Furthermore, a play mode button etc. is completely unnecessary.
Therefore, it is possible to significantly improve the size, weight, and cost required for this type of player, and moreover, it is less likely to break down.

As for the play mode switch, only an electric switch is sufficient. Therefore, it can be placed at any position on the player, and it is possible to improve the appearance, make it more compact, and improve operability.

Since a constant pressing force is applied between the capstan shaft and the pinch roller by the pressing action of the cassette tape, no pressing force is applied when the cassette tape is not in use and the sound quality due to deformation of the pinch roller is reduced. Deterioration and other harmful effects will be completely eliminated.

[Brief explanation of drawings]

The drawings show an embodiment according to the present invention, and FIG. 1 is a plan view of the pinch roller device and the vicinity of the head device, FIG. 2 is a front view of the same, FIG. 3 is a left side view of the same, and FIG. 4 is a view of the tape. 5 is a side view of the player with the lid open; FIG. 6 is a perspective view of the player with the lid closed; FIG. 7 is a rear view of the player; FIG.
The figure is a cross-sectional view taken along the line in FIG. 7. In the drawing, 1...cassette tape player, 2
... Player main body, 3 ... Ritsu, 4 ... Capstan shaft, 5 ... Pinch roller, 6 ... Arm member, 7 ... Cam driven part, 8 ... Cam part, 10 ...
Elastic means, 10a... contact portion, C... cassette tape.

Claims (1)

[Scope of Claims] 1. A player body, one end of which is rotatably supported, and a lip for setting a cassette tape, a capstan shaft is arranged in the player body, and a pinch roller is arranged in the Rit. In a cassette tape player, an arm member having an intermediate portion pivotally supported on a wrist is disposed, a pinch roller is pivotally supported at one end of the arm member, and a cassette tape is connected to the other end via a cam follower and an elastic member. A contact portion is provided that contacts the front end of the player body, and a cam portion that engages with the cam driven portion is provided on the player body, and the shape of the cam portion is such that the pinch roller and the capstan shaft are separated from each other when the wrist is open. A cassette tape player characterized in that the pinch roller and the capstan shaft are pressed against each other by the cassette tape with a predetermined pressing force when the lid is closed. 2. The cassette tape player according to claim 1, wherein the elastic member is a coil spring wound around a support shaft that pivotally supports the arm member.