JPH05182291A - Detector for tape player - Google Patents

Abstract

PURPOSE:To detect misinsertion of a cassette provided with reel holes on one side only at the time of inserting it into a cassette holder. CONSTITUTION:When the cassette Cb is inserted in its normal direction, a detecting projection part 37 is entered into a recessed part 4 formed on the cassette, and hence the state of an insertion detecting switch 39 is on while a switch 31 is off. Then, when the cassette Cb is inserted in the wrong direction (under the state of its side formed with no reel holes, facing a tape driving part), the detecting projection part 37 is kept on the upper surface of the cassette Cb as it is, and the state of the insertion detecting switch 39 is off while the switch 31 is on. By this difference in the detecting output, the misinsertion of the cassette Cb can be detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents erroneous insertion when a cassette having reel holes formed on only one surface is loaded, and further, another cassette having a smaller thickness than this cassette can be installed. The present invention relates to a detection device for a tape player that prevents false detection even when loaded.

[0002]

2. Description of the Related Art A conventional tape player uses a tape cassette Ca as shown in FIG. This cassette Ca is called a compact cassette tape, and reel holes 1a and 1b penetrating the upper and lower surfaces are formed in the case body 1. Inside the holes 1a and 1b, there are a supply side and a winding side. Each tape reel R1 and R2 is located. Further, protruding portions 1c are formed on the upper and lower surfaces of the exposed portion of the tape T, respectively.
An insertion hole 1d for the capstan and an insertion hole 1e for inserting a positioning locator or the like are formed therein.

For example, when the cassette Ca having the above structure is inserted into a stationary tape player having a rotary type cassette holder, the tape cassette Ca is inserted into the cassette holder in the direction of the arrow shown in FIG. It A guide portion for guiding the outer periphery of the cassette is formed in the cassette holder. When the cassette Ca is inserted, the cassette holder moves in the closing direction and is loaded into the tape drive unit, and reel reels 1a and 1b and respective holes 1d are attached to the reel base, capstan, and locator provided in the tape drive unit. 1e is attached. Since the reel holes 1a and 1b penetrate the upper and lower surfaces of the cassette Ca as described above, this cassette Ca is inserted when the upper and lower surfaces (A surface and B surface shown in FIG. 11) are reversed. However, it can be loaded into the tape drive.

[0004]

However, in the recent audio device, the audio cassette shown in FIG.
It is considered to use the tape cassette Cb shown in FIG. This cassette Cb is used for, for example, digital recording and reproduction, and is a cassette case 2
The tape exposure holes 2a and 2b formed in the front surface of the lid can be closed by the lid 3. Of the tape exposure holes, 2a is a magnetic head insertion hole, and 2b is a pinch roller insertion hole. The lid 3 is always closed by the spring ((a)
The tape exposure holes 2a and 2b are opened by forcibly sliding in the (b) direction.

Further, as shown in FIG. 10, the reel hole is not formed on the upper surface (the surface on the side a) of the cassette case 2, and the reel hole is formed only on the lower surface (the surface on the side b) of the case 2. The reel hole is exposed when the lid 3 is opened in the (B) direction. The conventional cassette Ca shown in FIG. 11 and the cassette Cb shown in FIG. 10 are interchangeable, and the center position of the tape reel, the facing position of the magnetic head, the capstan insertion position, and the pinch roller facing position are the same. Is becoming Therefore,
In future tape players, it is necessary to be able to use both of the above two types of cassettes Ca and Cb.

However, when the above-mentioned cassette Cb is inserted into the cassette holder, the upper surface (the surface on the side a) is mistakenly inserted so as to face the tape drive portion of the tape player, and then the cassette holder is directly inserted into the tape drive portion. If the lid 3 is opened in the (b) direction at this point, the surface where the reel hole is not exposed hits the reel base of the tape drive unit, and the cassette Cb is moved.
Not only becomes impossible to load, but also the mechanism provided in the tape drive may be damaged.

The present invention is to solve the above-mentioned conventional problems, and when loading a cassette having a reel hole formed on only one surface thereof, it is possible to determine an erroneous insertion at the time of insertion into the guide portion. An object of the present invention is to provide a detection device for a tape player, which can prevent erroneous detection when another cassette is inserted.

[0008]

SUMMARY OF THE INVENTION A detection device according to the present invention is a cassette in which a reel hole is formed only on one surface and a recess is formed on the surface opposite to the surface where the reel hole is formed. In the tape player to be loaded, the guide portion of the cassette is provided with a detection member for detecting whether or not the concave portion is present when the cassette is inserted into the guide portion.

Further, a first cassette in which a reel hole is formed only on one surface and a concave portion is formed on the surface opposite to the surface on which the reel hole is formed, and more than the first cassette. In a tape player in which a second cassette having a small thickness dimension is loaded, the guide portion of the cassette is
At the time when the cassette is inserted into the guide portion, the same detection state is obtained when the concave portions face each other and when the second cassette having a small thickness dimension faces each other, and a portion other than the concave portion of the first cassette is It is characterized in that a detection member which is in a detection state different from the above when provided is provided.

[0010]

According to the first means, when the tape cassette is inserted into the guide portion such as the cassette holder, the detecting member detects whether or not the concave portion faces the detecting member. Since the recess is formed on the surface opposite to the surface on which the reel hole is formed, when the recess is detected, it can be confirmed that the cassette has been inserted in the proper direction. When the concave portion is not detected, it is possible to detect that the cassette is erroneously inserted.

Further, in the second means, when a second cassette having a small width dimension other than the first cassette in which the reel hole is formed only on one surface is inserted, the detection state by the detection member is This is the same as when facing the recess, and a different detection state is obtained when a portion of the first cassette other than the recess faces the detection member. By obtaining different detection states only when the first cassette is erroneously inserted, this erroneous insertion state can be accurately recognized, and erroneous detection due to the insertion of the second cassette does not occur. ..

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a schematic side view of a tape player provided with a detection device according to an embodiment of the present invention, FIG. 2 is a plan view of a cassette holder shown in FIG. 1, and FIG. 3 is a view of the cassette holder shown in FIG. The front view, FIG. 4 and FIG. 5 are side views each having a partial cross section for explaining the detection operation when the cassette having the reel holes provided on only one surface is inserted from the normal direction, and FIG. A side view having a partial cross section for explaining a detection operation when the cassette is erroneously inserted,
FIG. 7 is a plan view having a partial cross section for explaining the detection operation when another cassette is inserted, and FIG. 8 is a schematic side view for explaining the difference in the thickness dimension of each cassette. The present embodiment is applied to a stationary tape player as an example, and both the tape cassette Ca shown in FIG. 11 and the tape cassette Cb shown in FIG. 10 can be inserted.

A cassette holder 20 is provided in the tape player shown in FIG. This cassette holder 20
Has a front guide surface 21, a side guide surface 22, and a rear guide surface 23, and is formed in a box shape into which a cassette can be inserted, and an insertion hole 24 is formed in the upward direction of FIG. ing. The rear guide surface 23 is formed with a constant width on both sides so that the reel hole direction of the cassette can be exposed. A leaf spring 25 for urging the cassette toward the main body chassis B of the tape player is provided on both inner sides of the front guide surface 21, and the cassette inserted in the cassette holder 20 has the leaf spring 25 and the rear guide surface. It is elastically held between 23 and. Further, a pair of mounting pins 26 that contact the front surface of the cassette on the insertion side and determine the insertion position of the cassette are provided in the lower part inside the front guide surface 21.

The cassette holder 20 is supported on the chassis B of the tape player by a shaft B1 so as to be rotatable in the X1-X2 directions. A tape drive unit A is provided on the front surface of the main body chassis B. When the cassette holder 20 rotates in the X1 direction, the cassette holder 20 is locked by a lock mechanism (not shown). In this state, the tape cassette inserted in the cassette holder 20 is pressed against the tape drive unit A by the leaf spring 25. A pair of reel bases 4 into which the tape reels in the tape cassette Ca or Cb are fitted are attached to the tape drive unit A.
2 and 43, a magnetic head H, a capstan (not shown), a pinch roller (not shown) and the like.

The cassette holder 20 includes a lid opening device 6
Is provided. The lid opening device 6 includes an opening arm 7 rotatably attached to the outside of the front guide surface 21 of the cassette holder 20, and a winding spring 8 that applies a biasing force to the opening arm 7 in a clockwise direction. It is composed of An opening pin 9 is fixed to one end of the opening arm 7, and the opening pin 9 is adapted to rotate inside an arc-shaped elongated hole 27 formed by penetrating the front guide surface 21. ing. The elongated hole 27 extends in an arc shape with a predetermined radius centered on the shaft 10 serving as a pivotal fulcrum of the open arm 7. The opening pin 9 is hooked on the tip of the lid 3 with respect to the tape cassette Cb shown in FIG. 10, and the lid 3 is opened by a relative operation with the tape cassette Cb. Further, when the tape cassette Ca shown in FIG. 11 is inserted, the opening pin 9 is inserted into the cassette C.
The front side of the insertion side of a is simply slid.

The other end of the arm 7 has a front guide surface 21.
A support portion 11 is attached to the rotary shaft 10 provided on the shaft so as to be rotatable, and a support portion 11 for supporting one end of the winding spring 8 is formed between both end portions. The coil spring 8 is attached across the support portion 11 of the arm 7, the rotary shaft 10, and the support portion 12 formed on the cassette holder, and the arm 7 is indicated by an arrow (d).
Biased in the direction. When the cassette Ca or Cb is completely inserted into the cassette holder 20 and the opening arm 7 rotates counterclockwise, the elastic force of the winding spring 8 exerts an upward discharging force on the cassette. The Ca or Cb is held by the leaf spring 25 provided in the cassette holder 20 to prevent the discharge. Alternatively, a lock mechanism may be provided to lock the open arm 7 when the open arm 7 rotates counterclockwise.

Reference numeral 31 in the drawing is a switch as a detection member which operates in response to displacement of the cassette in the thickness direction,
It is attached to the outside of the front guide surface 21 by a base 32. On this base 32, conductive leaf springs 33 and 34 are arranged in parallel. A contact member 35 is provided at the tip of the leaf spring 33, and a contact member 36 facing the contact member 35 is provided on the leaf spring 34.
A detection protrusion 37 is provided at the tip of the inner leaf spring 34 in the direction opposite to the contact member 36. The detection protrusion 37 is formed so as to protrude inward from a through hole 38 provided in the front guide surface 21.

As shown in FIG. 6, the contact member 35 and the contact member 36 come into contact with each other when the leaf spring 34 is elastically deformed by being pressed by the cassette Ca into which the detection protrusion 37 is erroneously inserted and turned on ( Switching) is designed to work. Reference numeral 39 in the drawing is a switch for detecting the state in which the cassette is inserted into the holder 20, and
When the front side of the insertion side of a or the cassette Cb hits, an on (switching) operation is performed. The detection of erroneous insertion or normal insertion of the cassette is performed by the switch 3 when the switch 39 is turned on and the insertion of the cassette is detected.
It is determined according to whether 1 is on or off. When it is determined that the cassette holder 20 is erroneously inserted, the cassette holder 20 is locked so as not to rotate in the X1 direction,
Or a warning is given by a display or sound.

The dimensions of the cassettes Ca and Cb in the thickness direction will be described with reference to FIG. As shown in FIG. 8, the tape cassette C without the lid shown in FIG.
The thickness dimension of the portion of a other than the protruding portion 1c is Ta, and the thickness dimension of the tape cassette Cb having the lid shown in FIG.
b, the depth dimension of the concave portion 4 of the tape cassette Cb is Th. Comparing the dimensions of the digital tape cassette Cb shown in FIG. 10 and the analog compact cassette shown in FIG. 11, the size Ta of the cassette Ca is formed to be approximately 1 mm thinner than the size Tb of the cassette Cb. .. Further, the depth dimension Th of the recess 4 is larger than the dimension difference ΔT between the cassette Cb and the cassette Ca.

Therefore, the facing distance between the contact members 35 and 36 in the switch 31 is separated from each other when the detection protrusion 37 is in the recess 4 of the cassette Cb, and the detection protrusion 37 is switched off. Switch off from each other when facing or sliding against the surface of
The detection protrusions 37 are set so as to come into contact with each other and switch on when the detection protrusions 37 ride on the surface of the cassette Cb other than the recesses 4.

Next, the inserting operation of each cassette will be described with reference to the drawings. First, the case where the tape cassette Cb having the lid 3 is inserted in the normal direction will be described with reference to FIGS. 4 and 5. In the cassette holder 20,
When the tape cassette Cb is inserted with the surface on the b side (see FIG. 10) facing the tape drive section A, and the tip of the cassette is pushed to the position of the detection projection 37, the detection projection 37 is placed on the upper surface of the cassette Cb. The leaf spring 34 elastically deforms in the direction of the arrow Y1 shown in the drawing, and the contact member 35 and the contact member 3
6 once contacts (state of FIG. 4). At this point in time, the switch 39 is not operating (OFF state), so the ON signal of the switch 31 is ignored in the circuit.

When the cassette Cb is pushed in as it is, and the cassette Cb is completely inserted, the detection projection 37 enters the recess 4, the leaf spring 34 returns in the Y2 direction in the figure, and the contact members 35 and 36 do not contact each other. Return to the state of. At this time, the insertion detecting switch 39 is turned on, and the switch 31 is turned off at this time, so that it is determined that the cassette Cb is inserted in a normal state. At this time, the opening arm 7 rotates counterclockwise and the lid 3 is completely opened by the opening pin 9, so that the tape exposing portions 2a and 2a.
While b is opened, the reel hole is exposed on the surface on the b side. Therefore, by rotating the cassette holder 20 as it is in the X1 direction in FIG. 1, the cassette Cb is loaded into the tape drive unit A, and the reel stands 42 and 43 are inserted into the tape reel in the cassette.

Next, the cassette Cb is oriented in the wrong direction, for example, the surface on the a side shown in FIG. 10 is directed toward the tape drive section A, or the surface on the b side is directed toward the tape drive section A. 6 will be described with reference to FIG. 6 in the case of being inserted in the cassette holder 20 with the end face opposite to the left and right direction of FIG. 10, that is, the end surface on the opposite side of the lid 3 facing the insertion direction. When the tip of the cassette Cb is pushed to the position of the detection protrusion 37, the detection protrusion 37 rides on the cassette Cb and the leaf spring 34 is elastically deformed in the direction of the arrow Y1 to bring the contact members 35 and 36 into contact with each other. Switch 31 is turned on.
When the cassette Cb is pushed in as it is and the switch 39 is turned on, the switch 31 is still on. At this time, it is determined that the cassette Cb is erroneously inserted, and the cassette holder 20 is locked, for example, and X
It is prohibited to move in one direction, and a warning sound, a warning display, or other appropriate means is used for notification.

Next, the case where the tape cassette Ca having no lid is inserted will be described with reference to FIG.
As described above, when the detection protrusion 37 faces or slides on the surface of the tape cassette Ca, the contact member 35
And 36 remain separated and switch 31 remains off. Therefore, when the switch 39 is on, the switch 31
Is off, it is determined that the tape cassette Ca is normally loaded. That is, in the above-described embodiment, when the cassette Ca is inserted and when the cassette Cb is inserted in the normal direction, the switch 31 is off at the time when the switch 39 is on, and the erroneous insertion is not determined.
Only when the cassette Cb is inserted from the wrong direction, the switch 31 is turned on at the time when the switch 39 is turned on, and only at this time is it determined that the insertion is wrong.

FIG. 9 shows a switch 31a according to another embodiment which can be installed in place of the switch 31 shown in FIG. This switch 31a is provided with two contact members 36a and 36b on an inner leaf spring 34 provided on a base 32, and two contact members 35a and 35b facing the respective contact members 36a and 36b are separated by separate plates. The springs 33a and 33b are provided so as to face each other, and the leaf springs 33a and 33b have different height positions. In this case, when the detection protrusion 37 enters the recess 4, the two pairs of contact members 35a, 35
6a and 35b, 36b are all off, and when the detection protrusion 37 rides on the cassette Ca, the pair of contact members 3
5a and 36a are turned on, and the other pair of contact members 35b and 36b are turned off. Further, when the detection protrusion 37 rides on a portion other than the concave portion 4 of the cassette Cb, two pairs of contact members 35a, 36a and 35b and 36b are both turned on. As a result, it is possible to detect an erroneous insertion of the tape cassette Cb as well as the above, and it is also possible to detect the types of the cassettes Ca and Cb.

Alternatively, the switch 31 shown in the above embodiment
Alternatively, a switch that is turned on / off depending on the difference in thickness between the cassettes Ca and Cb may be separately provided, and the types of the cassettes Ca and Cb may be detected at the same time as the above-mentioned detection of erroneous insertion of the cassette Cb.

[0027]

As described above, according to the first aspect of the present invention, erroneous insertion of a cassette having a reel hole only on one surface can be detected when it is inserted into a guide portion such as a cassette holder. , It is possible to prevent the cassette with the wrong orientation from being loaded in the tape drive unit.

Further, according to the second aspect of the present invention, not only can the erroneous insertion of the cassette having the reel hole formed on only one surface be detected, but the erroneous insertion detection state cannot be detected when another cassette is inserted. Therefore, the detection member does not malfunction due to the insertion of another cassette.

[Brief description of drawings]

FIG. 1 is a schematic side view of a tape player provided with a detection device according to an embodiment of the present invention.

FIG. 2 is a plan view of the cassette holder shown in FIG.

FIG. 3 is a front view of the cassette holder shown in FIG.

FIG. 4 is a side view having a partial cross section for explaining a detection operation when a cassette having reel holes only on one surface is inserted from a normal direction.

FIG. 5 is a side view having a partial cross section for explaining a detection operation when a cassette having reel holes provided on only one surface is inserted from a normal direction.

FIG. 6 is a side view having a partial cross section for explaining a detection operation when a cassette having reel holes only on one surface is inserted from an abnormal direction.

FIG. 7 is a plan view having a partial cross section for explaining a detection operation when a cassette having a reel hole penetrating therethrough is inserted.

FIG. 8 is a schematic side view for explaining a difference in thickness dimension of each cassette.

FIG. 9 is a perspective view showing another embodiment of the detection member.

FIG. 10 is a perspective view showing a tape cassette in which a reel hole is exposed on only one surface.

FIG. 11 is a partially enlarged perspective view of a tape cassette having a reel hole penetrating therethrough.

[Explanation of symbols]

Ca Tape cassette with reel hole penetrating through Cb Tape cassette with reel hole provided on only one surface 3 Lid 4 Recess 6 Opening member 7 Opening arm 9 Opening pin 20 Cassette holder 31, 31a Switch for detecting incorrect insertion 32 Base 33, 34 Leaf spring 35, 36 Contact member 37 Detection protrusion 39 Cassette insertion detection switch

Claims (2)

[Claims] 1. A tape player in a tape player, wherein a reel hole is formed only on one surface and a recess is formed on the surface opposite to the surface on which the reel hole is formed. A detection device for a tape player, wherein the tape player is provided with a detection member for detecting whether or not the concave portion is present when the cassette is inserted into the guide portion. 2. A first cassette in which a reel hole is formed only on one surface and a concave portion is formed on a surface opposite to the surface on which the reel hole is formed, and a first cassette more than the first cassette. In a tape player in which a second cassette having a small thickness dimension is loaded, the guide portion of the cassette has a second thickness having a smaller thickness dimension when the cassette is inserted into the guide portion than when the concave portion is opposed. The tape player is provided with a detection member which has the same detection state when the cassettes face each other and has a detection state different from the above when the portions other than the concave portions of the first cassette face each other. Detection device.