JPH05334841A - Tape cassette - Google Patents

Abstract

(57) [Abstract] [Purpose] A tape cassette that satisfies the dust-proof structure of the magnetic tape and has a structure that sufficiently covers the opening for inserting the post group, and provides an excellent tape cassette design. .. [Structure] A front lid 8 that moves a fulcrum after a pivoting operation, a canopy 9 that interlocks with the fulcrum, and a bottom lid that moves from a position that covers the lower surface of the cassette housing 2 to an upper surface, following these movements. 10 is a tape running guide body including [Effect] The bottom cover can cover the bottom surface of the opening of the cassette housing, particularly the inner wall portion. Therefore, when the lid is closed, since the opening is almost covered, the appearance of the tape cassette is close to that of a complete housing, which is excellent in design.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cassette containing a tape-shaped recording medium.

[0002]

2. Description of the Related Art As is well known, what is called a tape cassette is used in a conventional cassette type video tape recorder (hereinafter referred to as VCR) and a cassette type audio tape recorder. A magnetic tape, which is a recording medium, is housed in this tape cassette and mounted on the VCR body to record and reproduce signals.

FIG. 10 is a perspective view showing an example of a conventional tape cassette applied to a VCR as viewed from the bottom surface direction. FIG. 11 is a partial cross-sectional view of the tape cassette 101 seen from the AA direction in FIG. 101 in FIGS.
In this tape cassette, a magnetic tape 104 whose ends are locked to the supply-side reel 102 and the winding-side reel 103 is stretched over the front surface. A cassette housing 105 including an upper half 105a and a lower half 105b has a supply reel 102 and a take-up reel 103 built therein. Cassette housing 10
5 has an inner wall 106a formed along the supply reel 102 and the take-up reel 103 from the bottom surface to the top surface, and the opening 106 is formed inside the inner wall 106a and the magnetic tape 104 stretched on the front surface. Will be shaped.
The opening 106 is large in size for inserting posts of the VCR and a recording / reproducing unit (not shown). Reference numeral 107 denotes a front lid which is supported by the cassette housing 105 at a pivot point 107a. Further, reference numeral 108 denotes a rear lid which has a fulcrum on an arm 107a provided integrally with the front lid 107 and whose movement is restricted by a guide 108a guided by a cam groove 109. The magnetic tape 104 stretched over the front surface of the cassette housing 105 is protected by a front lid 107 and a rear lid 108 from intrusion of dust or moisture from the outside or inadvertently being touched by fingers. FIG. 12 shows the magnetic tape 10.
4 is a partial cross-sectional view showing a state in which a front lid 107 and a rear lid 108 are opened in order to expose 4 in FIG. In order to shift from the state of FIG. 11 to the state of FIG. 12, first, the front lid 107 is pushed up by the opening member (not shown) of the VCR, and the pivot point 107 is rotated.
Rotation is performed around a. The rear lid 108 having a fulcrum on the arm 107a is a guide 1 that is engaged with the cam groove 109.
The movement of the front lid 107 is interlocked with the movement of the front lid 107, while the movement of the front lid 107 is restricted by 08a. By restricting the movement of the rear lid 108, the magnetic tape 104 is not caught and damaged during the reciprocating operation from the opening to the closing. Figure 1
In the state of No. 2, the opening 106 is completely open, and a group of VCR posts (not shown) is inserted into the opening 106 and the magnetic tape 104 is pulled out from the cassette housing 105 to record / reproduce the VCR. It can be attached to (not shown).

[0004]

However, in the above-mentioned conventional tape cassette 101, the magnetic tape 104 is protected by the rear lid 108, but the opening 106 is not completely covered. Therefore, even when the lid is closed, the supply reel 1 is attached to the bottom surface of the tape cassette 101.
02, the inner wall 106a along the take-up reel 103 remains exposed without changing to the open state, and is not covered by the rear lid 108. This did not mean that the tape cassette was aesthetically superior.

The present invention solves the above-mentioned problems of the prior art, and has a structure in which the magnetic tape satisfies the dustproof structure, and the opening for inserting the post group is sufficiently covered.
The purpose is to provide a tape cassette excellent in design.

[0006]

In order to achieve this object, a tape cassette of the present invention comprises a cassette housing having openings on the upper and lower surfaces inside a tape-shaped recording medium suspended on the front surface, and It is rotatable between a first position that covers the outside of the tape-shaped recording medium and a second position that exposes the tape-shaped recording medium, and a third position in the rear surface direction of the cassette housing from the second position. A front lid movably supported by the cassette housing and a front lid that covers the upper surface of the opening of the cassette housing when the front lid is in the first position, and the front lid is in the first position. From the above to the second position, the canopy that moves in conjunction with the front lid to a position where the upper surface of the opening of the cassette housing is opened; and when the front lid is in the first position. Cover the lower surface of the opening of the cassette housing, The front lid from the first position the third
When it is moved to the position, it has a bottom lid that moves to the upper surface of the cassette housing in conjunction with the front lid.

[0007]

According to the present invention, the bottom lid covering the lower surface of the opening portion of the tape cassette is interlocked with the front lid when the VCR is not attached to the VCR, and the bottom lid is moved from the rotating operation. Can be brought from the bottom to the top of the cassette housing.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a tape cassette 1 to which the present invention is applied.
3 is an exploded perspective view of a lid portion of FIG. FIG. 2 shows a plan view of the tape cassette 1 in the closed state. FIG. 3 is a side view of the tape cassette 1 seen from the direction of arrow C in FIG. Further, FIG. 4 shows a cross-sectional view taken along the line DD in FIG. 2 and viewed from the direction of the arrow. 1 to 4,
On the front surface of the cassette housing 2 composed of the upper half 2a and the lower half 2b, there are formed tape outlets 3 which are open on both left and right sides when viewed in the longitudinal direction of the tape cassette 1. A magnetic tape 4 is stretched across the left and right sides of the tape outlet 3. The cassette housing 2 has an inner wall 5 inside a magnetic tape 4 stretched over the front surface, and an opening formed by the magnetic tape 4 and the inner wall 5, and left and right side walls 6 connecting the tape outlet 3 and the inner wall 5. There is a section 7. When the tape cassette 1 is not used, in order to protect the magnetic tape 4 stretched over the front surface from fingers, dust, moisture, etc., the front surface, the top surface, and the bottom surface of the opening 7 are respectively covered with a front lid 8, a canopy 9, and a bottom lid. 1
Covered by 0. The front lid 8 includes a front surface portion 11 that covers the magnetic tape 4 substantially in parallel when the lid is closed at the first position, and left and right side surface portions 12 that are connected to the front surface portion 11 and have a U-shape.
A rotation support shaft 13 is formed inside the side surface portion 12 and is rotatably engaged with a rotation center hole 15 formed in the side surface 14 of the cassette housing 2. A torsion coil spring 16 for biasing the front lid 8 in the closing direction is fitted and inserted into the rotation support shaft 13, and is arranged between the side surface portion 12 of the front lid 8 and the side surface 14 of the cassette housing 2. .. One end of the torsion coil spring 16 is a protrusion 12 provided inside the side surface portion 12 of the front lid 8.
a and the other end is hooked on a step portion 14 a provided on the side surface 14 of the cassette housing 2. In the closed state where the front lid 8 is in the first position, the jaw portion 3a protruding from the tape outlet 3 of the cassette housing 2 and the notch portion 11a provided on the front surface portion 11 of the front lid 8 are butted against each other. The position of the front lid 8 is regulated. The canopy 9 includes an upper surface portion 17 having a shape covering the upper surface of the opening portion 7 and a side surface portion 18 continuous with the upper surface portion 17. This side part 1
8 includes a cassette housing 2 for restricting movement of the canopy 9.
A guide shaft 20 that engages with a guide groove 19 formed on the side surface 14 of the is provided inside. Further, an engaging shaft 21 is provided inside the side surface portion 18 of the canopy 9 in order to interlock the movements of the front cover 8 and the canopy 9, and an engaging hole 22 for engaging with the engaging shaft 21 is provided with an engaging hole 22. 8 is formed on the front surface portion 11. As a result, the movements of the front lid 8 and the canopy 9 are interlocked, and the front lid 8
The movement of the canopy 9 is regulated by the guide groove 19 in accordance with the rotation operation of the above, and the upper surface of the opening 7 is covered by the torsion coil spring 16 when the tape cassette 1 is not used. The bottom cover 10 has a shape that covers the opening 7, and has a guide shaft 23 that restricts its movement on the side.
Is a cam groove 24 formed on the side wall 6 of the cassette housing 2.
Is engaged with. The position of the bottom lid 10 is regulated by the lower end of the front surface portion 11 of the front lid 8 and the step portion 5a formed on the inner wall 5 of the cassette housing 2 when the lid lid is closed. The canopy 9 and the bottom cover 10 are connected by a link member 25 for interlocking movement. That is, at both ends of the link member 25, a support shaft a27 that engages with a bearing portion 26 provided inside the upper surface portion 17 of the canopy 9, and a bearing portion 2 provided on the upper surface of the bottom lid 10.
A support shaft b29 engaging with 8 is formed. The configuration described above is basically bilaterally symmetrical with respect to DD in FIG.

The tape cassette 1 configured as described above
On the other hand, the lid opening operation will be described in more detail. FIG. 5 and FIG. 6 show views in which the lid is opened until the magnetic tape 4 can be pulled out from the tape cassette 1. At this time, the front lid 8 is in the third position moved from the rotating position. FIG. 5 is a side view of the tape cassette 1 corresponding to FIG.
4 is a cross-sectional view corresponding to FIG. 4, taken along the line DD in FIG. 2 and viewed from the direction of the arrow. As shown in FIGS. 5 and 6, the front lid 8, the canopy 9, and the bottom lid 10 are all lifted up to the upper surface of the cassette housing. The movement of the lid moving from FIG. 4 to FIG. 6 is shown in FIGS. 7 and 8 in order. In FIG. 7, the front lid 8 has about 45
It is a cross-sectional view of a state of being rotated. In this state, the front lid 8
Makes a simple rotation and the canopy 9 moves while being guided by the guide groove 19. The bottom lid 10 is connected to the canopy 9 by a link member 25, and is lifted while the posture is regulated by the cam groove 24 according to the movement of the canopy 9. At this time, the bottom lid 10
The leading end of the magnetic tape 4 rises while escaping the lower end of the magnetic tape 4.
Therefore, the bottom lid 10 does not catch the magnetic tape 4 and damage it during the opening and closing operations. FIG. 8 is a cross-sectional view of the front lid 8 rotated by about 90 °, which is the second position where the magnetic tape 4 is exposed. here,
The canopy 9 extends from the position covering the upper surface of the opening 7 to the cassette housing 2
It has moved completely toward the rear side. The front surface portion 11 of the front lid 8 which is rotated about 90 ° instead is located on the upper surface of the opening portion 7. At this time, the bottom cover 10 is pulled up to the middle of the opening 7 via the link member 25. Here, the relationship between the rotation support shaft 13 of the front lid 8 and the rotation center hole 15 provided in the side surface portion 14 of the cassette housing 2 shown in FIG. 9 will be described. In FIG. 9, a cross section of the rotation support shaft 13 has a shape in which a cylinder is cut on both sides in the axial direction, and the rotation center hole 15 has an arc portion 15a fitted to the cylindrical portion of the rotation support shaft 13 and a rotating portion. It is composed of an elongated hole portion 15b having the same chord width as the cut of the drive shaft 13. The front cover 8 is about 90 ° in 13a shown by an imaginary line.
9 is a cross section of the rotating support shaft 13 in the rotated state of FIG. 8. The rotation support shaft 13 can be pulled down in the rear surface direction of the cassette housing 2 along the elongated hole portion 15b of the rotation center hole 15, and the position at this time is shown by an imaginary line 13b. Rotating support shaft 1
When 3 moves from the position 13a to the position 13b, the state of FIG. 8 shifts to the state of FIG. That is, the front lid 8 and the canopy 9 move from the state of FIG. 8 in parallel with the upper surface of the cassette housing 2, and accordingly, the bottom lid 10 further moves up and moves toward the rear surface of the cassette housing 2. As a result, in FIG. 6, the front portion 11 of the front lid 8 and the bottom lid 1 are
0 can open the opening 7 from the upper surface to the lower surface to insert a post group (not shown).

[0011]

As described above, in the tape cassette according to the present invention, the bottom surface of the opening of the cassette housing, particularly the inner wall portion, can be covered by the bottom lid. Therefore, when the lid is closed, since the opening is almost covered, the appearance of the tape cassette is close to that of a complete housing, which is excellent in design and has a large practical effect.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a tape cassette according to an embodiment of the present invention.

FIG. 2 is a plan view of a closed state of the tape cassette according to the embodiment of the present invention.

FIG. 3 is a side view of the tape cassette in the closed state according to the embodiment of the present invention.

FIG. 4 is a full sectional view of a tape cassette in a closed state according to an embodiment of the present invention.

FIG. 5 is a side view of the tape cassette in the opened state according to the embodiment of the present invention.

FIG. 6 is a full sectional view of a tape cassette in an opened state according to an embodiment of the present invention.

FIG. 7 is a full sectional view of the tape cassette according to the embodiment of the present invention during the lid opening operation.

FIG. 8 is a full sectional view of the tape cassette according to the embodiment of the present invention during the lid opening operation.

FIG. 9 is a partially enlarged view of a front lid rotation supporting shaft of a tape cassette according to an embodiment of the present invention.

FIG. 10 is a perspective view of an example of a conventional tape cassette.

FIG. 11 is a partial sectional view of an example of a conventional tape cassette in a closed state.

FIG. 12 is a partial sectional view of an example of a conventional tape cassette in an open state.

[Explanation of symbols]

 1 tape cassette 2 cassette housing 4 tape recording medium 7 opening 8 front lid 9 canopy 10 bottom lid

Claims (1)

[Claims] 1. A cassette housing having opening portions on the upper and lower surfaces inside a tape-shaped recording medium stretched over the front surface, a first position for covering the outside of the tape-shaped recording medium, and the tape-shaped recording medium. A front lid rotatably supported between the second positions for exposing the cassette housing and movably supported by the cassette housing from the second position to a third position in the rear surface direction of the cassette housing; When the front lid is in the first position, it covers the upper surface of the opening of the cassette housing, and when the front lid is rotated from the first position to the second position, it interlocks with the front lid. A canopy that moves to a position where the upper surface of the opening of the cassette housing is opened; and a front cover that covers the lower surface of the opening of the cassette housing when the front lid is in the first position, When moving from position 1 to position 3 Tape cassette, characterized in that it and a bottom cover to move to the upper surface of the cassette housing in conjunction with.