JPH01109585A - Tape cassette - Google Patents

Abstract

PURPOSE:To ensure the engaging of a slider cover in open position and to prevent a malfunction by constituting the title cassette so that an engaging member is pushed to the rear of an engaging member when the slide cover is opened, and the protruding part of the engaging member is intruded into the through hole in the slide cover. CONSTITUTION:When the slide cover 7 slides to a position to open the lower half of the front surface of a main body case 5, the position of the through hole 11 of the cover 7 and that of the protruding part 10 of the engaging member 13 are made coincident with each other and the protruding part 10 is intruded into the hole 11 and simultaneously the engaging member 14 supported pivotally to the case 5 is pushed by a spring 12 provided between the case 5 and the cover 7 and rotated to position itself in the rear of the member 13. Thus the member 13 is energized by the engaging member 14 to allow the protruding part 10 to intrude into the through hole 11 of the cover 7. As a result, even if the elasticity of the engaging member 13 is reduced, the sliding cover 7 can be exactly engaged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a tape cassette of a type in which the tape is pulled out from the main case during use.

(Prior Art) Video tape cassettes and digital recording audio tape cassettes employ a system in which the tape is pulled out from the front of the main body case when loaded into a deck.

For such tape cassettes, the front side of the case must be opened to pull out the tape when the deck is attached, and the bottom side of the case must be opened to install the tape pull-out device.Furthermore, in order to protect the tape from objects entering from the outside when not in use, These openings must be opened.

For this reason, conventionally, a swing cover that can swing to cover the front of the main body case and a slide cover that can slide to cover the bottom surface of the main case have been installed, and the slide cover opens to the position that opens the front bottom surface of the main case. It is slidable so that it can assume two positions, and is generally biased toward the closed position by a spring.

A mechanism for locking the slide cover in a position that opens or closes the front lower surface of the main body case was developed in Japanese Patent Application Laid-Open No. 1983-1989.
-214487, JP-A-61-22485, and JP-A-61-292285. JP-A-60-2
14487 and JP-A-61-22485, the locking member for locking the slide cover is integrally provided on the bottom wall of the main body case as a cantilever spring extending in the sliding direction of the slide cover. -2
92285 is configured such that the locking member extends perpendicularly to the sliding direction of the slide cover.

There is also a method in which the locking member as described above is biased by a spring provided separately from the main body.

[Problem that the invention seeks to solve]

The above-mentioned conventional techniques for slide cover locks have the following drawbacks.

In other words, in the first mechanism in which the lock member is integrally provided on the bottom wall of the main body case as a cantilever spring extending in the sliding direction of the slide cover, the biasing force of the lock member increases as the slide cover is repeatedly slid and locked. It becomes weak and cannot be locked reliably, and if sliding locking is repeated, eventually it will not lock at all.

This is because the locking member is formed integrally with the main body, and the cantilever spring is made of resin, which cannot withstand repeated use.

The second Akebonobashi mechanism, in which the locking member extends perpendicular to the slide direction of the slide cover, has better durability than the first mechanism because the direction of the force applied to the locking member is different, but it will still not lock after repeated use. .

The TA structure, in which the locking member is biased by a spring, has better durability, but since two locking members are generally provided, two small springs must be incorporated, which increases the number of parts and requires detailed assembly work. become.

The present invention has been made to solve the above problems,
To provide a locking mechanism for a tape cassette slide cover that is highly durable and easy to assemble.

[Means for solving problems]

In a tape cassette that has an opening for tape loading on the lower front surface of the main case, and the opening is opened and closed by a slide cover that can slide in the front and back direction, the bottom wall of the main case has a protrusion at the tip. A locking member made of a cantilever spring is provided, a through hole is provided in the slide cover, a spring is installed between the main body case and the slide cover to bias the slide cover in the forward direction, and the spring is swung against the main body case. The locking member is engaged with a freely pivotally mounted swinging member, and when the slide cover is opened, the swinging member is pushed behind the locking member, and the protrusion of the locking member is inserted into the through hole of the slide cover. energize.

[For production]

When the slide cover slides to the position that releases the front lower surface of the main case, the position of the through hole in the slide cover and the position of the protrusion on the locking member match, allowing the protrusion on the locking member to enter the through hole in the slide cover. becomes. At the same time, the swinging member pivotally connected to the main body case is rotated by the spring installed between the main body case and the slide cover and comes to be located behind the locking member. In this way, the locking member is urged by the swinging member and the protrusion enters the through hole of the slide cover. Therefore, even if the elasticity of the locking member decreases, the slide cover can be reliably locked. When sliding the slide cover to the position where the front lower surface of the main body case is closed, use the slide cover disengagement pin provided on the deck to push the protrusion against the elasticity of the locking member and the swinging member to release the protrusion from the slide cover. from the through hole, and slide the slide cover forward using the biasing spring provided between the slide cover and the main body case.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the magnetic tape 2 wound on a reel 1.1 is wound inside a main body case 5, which is made by butting and tightening a lower half 3 and an upper half 4 made of plastic. It is stored so that it can be returned freely. A part of the main body case 5 is made up of a transparent plate 6, so that the winding state of the magnetic tape 2 can be observed. The slide cover 7 attached to the lower half 3 moves between the position shown by the solid line in Fig. 2, which is the position where the front lower surface is closed, and the position shown by the dashed line in Fig. 2, which is the position where the front lower surface of the main body case is opened. It is slidable and biased by a spring 12 in the direction of the arrow shown.

A swing cover 8 attached to the upper half 4 is swingable between a closed position shown in FIGS. 1 to 3 and an open position shown in FIG. 4. The magnetic tape 1 is wound through the front of a rib 9.9 (Fig. 5) which is made integrally with the lower half 3 and has screw holes for tightening the upper half.
(Not shown in Figures 5 to 9) When the slide cover 7 and swing cover 8 are opened as shown in Figure 4, the tape drawer provided on the deck is located under the front of the tape cassette. It is possible to enter the tape cassette from the side and pull the tape forward.

When the tape cassette is not in use, the slide cover 7 and the swing cover 8 are in a position to close the internal space, as shown in FIG. 3, to prevent fingers and dust from entering the tape cassette.

In this way, the slide cover 7 has two positions, the position where the main body case is gripped and the position where it is opened. An example will be explained.

The spring 12 is a torsion coil spring, and the central coil portion is attached to a bin integrally provided with the slide cover 7, and the end portions of both arms are wound around the swinging member 14. The swinging member 14 is pivotally connected to the lower half 3 by a pin 15, and therefore the spring 12 is mounted between the main body case and the slide cover via the swinging member 14. Furthermore, torsion spring 1
2 has a shape that narrows the angle at which it can be held between both arms, and urges the slide cover 7 in the direction of the arrow shown. When the slide cover 7 is slid from the position shown in Fig. 5 to the position shown in Fig. 6 by the operation of the deck bottle, the lock, which is a cantilever spring provided integrally with the lower half, as shown in Fig. 7, is released. The position of the tip protrusion 10 of the member 13 and the position of the through hole 11' provided in the slide cover match, and the swinging member 14
is pushed by the spring 12 and pushed behind the locking member 13, and the projection 10 of the locking member plunges into the through hole 11' due to the action of the elasticity of the locking member itself and the pressure of the swinging member 14, and closes the slide cover. lock. In this way, the slide cover is reliably locked in the open position, and locking failures due to deterioration of the elasticity of the locking member can be prevented. When closing the slide cover 7, the slide cover lock release pin provided in the deck pushes the protrusion of the lock member against the elasticity of the lock member 13 and the swinging member 14, thereby releasing the lock member. The slide cover is closed by the action of the spring 12, and the position of the tip protrusion 10 of the locking member matches the position of the through hole 11 of the slide cover, and the protrusion 10 enters the through hole 11 and the slide cover is locked. .

Next, a second embodiment of the invention will be demonstrated with reference to FIGS. 8 and 9.

In this embodiment, the spring 12 is attached to the pin of the slide cover 7, and both arms are wound around the pin of the swinging member 14, as in the first embodiment. In this case, the tips of both arms of the spring 12 extend further and engage with a plate 16 erected on the lower half 3. Even with this configuration, the slide cover 7 is urged forward by the spring 12, and when the slide cover is opened, the swinging member 1 is pushed forward by the action of the spring 120.
4 is pushed behind the locking member 13, and the same effect as in the first embodiment is performed.

〔Effect of the invention〕

As mentioned above, the sliding cover is reliably locked in the open position by pressing the back of the locking member with the swinging member provided on the sliding cover, and even after long-term use, the locking does not occur due to elastic deterioration of the locking member. No malfunctions occur due to poor stopping.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a tape cassette according to an embodiment of the present invention viewed diagonally from above, Fig. 2 is a perspective view of the tape cassette seen diagonally from below, and Fig. 3 shows the swing cover and slide of the tape cassette. A side view showing the closed state of the cover;
FIG. 4 is a side view showing the tape cassette with its swing cover and slide cover open; FIG. 5 is a sectional view taken along the line A-A in FIG. The figure is B- in FIG. 4 showing the first embodiment of the present invention.
8 is a sectional view taken along the line C-C in FIG. 6, FIG. 8 is a sectional view taken along the line A-A in FIG. 3 showing the second embodiment of the present invention, and FIG. The figure is a sectional view taken along the line BB in FIG. 4, showing a second embodiment of the present invention. 1... Reel, 2... Magnetic tape, 3... Lower half, 4... Upper half, 5... Main body case, 6...
Transparent plate, 7...Slide cover, 8...Swing cover, 9...Rib, 10...Protrusion, 11...Through hole, 12...Spring, 13...Lock member, 14-・
- Swinging member, 15... bottle, 16... plate. Applicant's agent Hiroshi Fujimoto Hiroshi 12 Figure 3 Figure 4 Figure 6 Figure 7 Figure 6 Figure 9

Claims (1)

[Claims] In a tape cassette that has an opening for tape loading on the lower front surface of the main case, and the opening is opened and closed by a slide cover that can slide in the front and back direction, the bottom wall of the main case has a protrusion at the tip. A locking member made of a cantilever spring having a diameter is provided, a through hole is provided in the slide cover,
A spring that urges the slide cover forward is installed between the main body case and the slide cover, and the spring engages with a swinging member pivotally connected to the main body case so that the slide cover is opened. In the tape cassette, the swinging member is pushed behind the locking member to urge the protrusion of the locking member to enter the through hole of the slide cover.