JPH07153233A - Cassette for recording and reproducing device - Google Patents

Abstract

PURPOSE:To facilitate slide operation by exposing an exposing surface of a miserasing preventing plug to two surfaces or more of a cassette main body and making the plug easily movable by the ball of a finger. CONSTITUTION:The miserasing preventing plug 5 is freely slidably provided in the cassette main body 1. A miserasing preventing detection hole 10 of the cassette main body 1 is opened by sliding this plug 5, so that recorded information is prevented from being miserased. The miserasing preventing plug 5 has exposing surfaces 5c and 5d to be exposed on two surfaces or more of the cassette main body 1. The cassette main body 1 has an opening which continues over adjacent two surfaces, while the miserasing preventing plug 5 has two continuous exposing surfaces 5c and 5d exposed in an opening 8, thus making the constitution effective. Moreover, continuous exposing surfaces 14a, 14b and 14c of a main body 14 are exposed on the adjacent two surfaces of a plug main body 12, and are engaged with guide grooves 21a and 21b of the plug main body 12. The plug 13 can easily be slid by pinching the exposing surfaces 14a, 14b and 14c, and the recording state can easily be seen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents accidental erasure of information recorded on a recording medium such as a magnetic tape, a magnetic disk or an optical disk by sliding an accidental erasure prevention plug to open an erroneous erasure prevention detection hole. The present invention relates to a cassette for a recording / reproducing device, and more particularly to a cassette for a recording / reproducing device in which an accidental erasure prevention plug can be easily slid with a finger.

[0002]

2. Description of the Related Art Conventionally, as a cassette for a recording / reproducing apparatus equipped with this kind of accidental erasure prevention plug, for example,
There is one as shown in FIG. This Figure 12 is 8mm
It shows a video cassette, 1 in the figure is the cassette body,
2 is a cassette lid, and the cassette body 1 is an upper half 1a
And the lower half 1b. On the back surface of the cassette body 1, there is provided an erroneous erasure prevention display window 3 for indicating whether or not information can be recorded on a magnetic tape housed inside, and the erroneous erasure prevention display window 3 is provided on the display window 3. The plug 4 is slidably attached.

The erroneous erasure prevention plug 4 is provided with a plug body 4a for opening and closing an erroneous erasure prevention detection hole provided in the cassette body 1 in order to prevent information recorded on a magnetic tape from being accidentally erased. The main body 4a has a claw portion 4b engaged with the erroneous erasure prevention display window 3 for opening and closing the erroneous erasure prevention detection hole. When the information can be recorded on the magnetic tape, only the claw portion 4b is displayed on the display window 3.
On the other hand, while the erroneous erasure prevention detection hole is closed by the plug body 4a, when the information recording is impossible, the display window 3 is closed and the erroneous erasure prevention detection hole is opened by the plug body 4a including the claw portion 4b. .

[0004]

However, in the conventional recording / reproducing apparatus cassette as described above, the cassette body 1 is sufficiently miniaturized, and the erroneous erasure prevention display window 3 and the erroneous erasure prevention plug are provided. 4 is formed sufficiently small, and the claw portion 4b is not recessed in the display window 3 so that its tip is not projected outward from the outer surface of the cassette body 1. Further, the erroneous erasure prevention plug 4 does not easily move due to vibration during transportation or impact when dropped, and the erroneous erasure prevention plug 4 has a large operating force so that it does not move only when a predetermined force or more is applied. It is set. Therefore, there is a problem that it is difficult for the finger to be caught in the claw portion 4b and the operation for opening and closing the erroneous erasure prevention plug 4 is difficult.

The present invention has been made in view of such conventional problems, and by exposing the erroneous erasure prevention plug largely on the outer surface of the cassette body, a finger can be easily hooked on the erroneous erasure prevention plug. It is an object of the present invention to provide a cassette for a recording / reproducing device that can be easily slid while securing a certain operating force of the erroneous erasure prevention plug.

[0006]

In order to solve the above-mentioned problems and to achieve the above-mentioned object, the present invention, for example, as shown in FIGS. 1 to 11, is a cassette containing a recording medium. Accidental erasure prevention plug (5, 1) on the body (1, 12)
3) is provided slidably, and the erroneous erasure prevention plugs (5, 13) are slid so that the cassette body (1, 1
In a cassette for a recording / reproducing apparatus, which prevents accidental erasure of information recorded on a recording medium by opening the erroneous erasure prevention detection hole 10 formed in 2), an erroneous erasure prevention plug (5, 1)
3) is an exposed surface (5c, 5d, 14a, 14b, 1) of two or more surfaces exposed on two or more surfaces of the cassette body (1, 12).
4c).

The recording / reproducing apparatus cassette of the present invention is, for example, as shown in FIGS.
Has a continuous opening 8 on two adjacent surfaces, and the erroneous erasure prevention plug 5 preferably has a continuous two exposed surfaces 5c and 5d exposed on the opening 8.

Further, the erroneous erasure prevention plug 13 according to the cassette for the recording / reproducing apparatus of the present invention is, for example, as shown in FIGS. 6 to 11, an exposed surface 14a which is continuous to at least two adjacent surfaces of the cassette body 12, The plug main body 14 having 14b and 14c and the engaging claws 15a and 15b that are provided in the plug main body 14 and that engage with the guide grooves 21a and 21b formed in the cassette main body 12 may be configured.

[0009]

The present invention has the above-mentioned configuration,
Two or more surfaces of the cassette body (1, 12) and two or more exposed surfaces (5c, 5d, 14) of the erroneous erasure prevention plugs (5, 13)
a, 14b, 14c) are exposed, the exposed surface (5
(c, 5d, 14a, 14b, 14c) is put on the finger, pinched, etc. to prevent accidental erasure.
13) can be easily slid.

Further, since the two consecutive exposed surfaces 5c and 5d of the erroneous erasure prevention plug 5 are exposed in the opening 8 which is continuous with the two adjacent surfaces of the cassette body 1, the erroneous erasure prevention plug 5 can be touched with a finger. It can be easily slid according to the belly.

Further, at least two continuous exposed surfaces 14a, 14b, 14c of the plug body 14 are exposed on at least two adjacent surfaces of the cassette body 12, and engaging claws 15a, 15b provided on the plug body 14 are provided. Since it engages with the guide grooves 21a, 21b of the cassette body 12, the erroneous erasure prevention plug 13 can be easily slid by pinching its exposed surfaces 14a, 14b, 14c.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show a first embodiment of the present invention, and FIGS.
Shows a second embodiment of the present invention. still,
1 to 11, the same parts as those in FIG. 12 showing the conventional example are designated by the same reference numerals and described.

In FIG. 1, reference numeral 1 denotes a cassette body formed of a synthetic resin having an appropriate rigidity, and the cassette body 1 is composed of an upper half 1a and a lower half 1b which are superposed on each other. . The cassette body 1 contains a supply reel and a take-up reel on which a magnetic tape showing a specific example of a recording medium is wound, and a part of the magnetic tape is exposed on the front surface of the cassette body 1. There is. The front surface of the cassette body 1 from which the magnetic tape is exposed is openable / closable by a cassette lid 2 rotatably attached to the front portion of the cassette body 1.

An erroneous erasure prevention plug 5 for preventing erroneous erasure of information recorded on the magnetic tape is provided at the corner of the cassette body 1 where the erroneous erasure prevention detection hole 10 is provided. It is installed. As shown in the enlarged view of FIG. 3, the erroneous erasure prevention plug 5 includes a block-shaped plug body 5a and a claw portion 5b provided on one surface of the plug body 5a. And, in the plug body 5a,
By providing the slit 6, the elastic piece 7 having a proper elasticity is formed. The elastic piece 7 is formed on the lower surface side of the cassette body 1 in the plug body 5a, and the lower surface thereof is provided with an arcuate convex portion 7a.

An opening 8 as an erroneous erasure prevention display window is provided at the corner of the cassette body 1 in which the erroneous erasure prevention plug 5 having such a structure is arranged and which is continuous with two adjacent back and side surfaces. ing. The opening 8 is formed by an L-shaped cutout portion 8a provided in the upper half 1a and an L-shaped cutout portion 8b provided in the lower half 1b so as to be symmetrical to this. As shown in FIGS. 3 to 5, guide ridges 9a and 9b for ensuring the sliding operation of the erroneous erasure prevention plug 5 are formed on the upper and lower halves 1a and 1b, respectively. Further, the lower half 1b is fitted with the erroneous erasure prevention detection hole 10 opened and closed by the plug body 5a based on the sliding operation of the erroneous erasure prevention plug 5 and the protrusion 7a of the elastic piece 7 alternately based on the sliding operation. A pair of hemispherical recesses 11a and 11b are provided.

The openings 8 of the upper and lower halves 1a and 1b as described above.
The erroneous erasure prevention plug 5 is slidably attached to the cassette body 1 with the claw portion 5b inserted therein. Therefore, in the opening 8, a rear surface 5c having the claw portion 5b of the erroneous erasure prevention plug 5 and a side surface 5d continuous with the rear surface 5c.
And the two surfaces are exposed, which form exposed surfaces 5c and 5d of the erroneous erasure prevention plug 5.

In this case, in the recordable state (shown by the solid line in FIG. 4) with the accidental erasure prevention plug 5 pulled out, the accidental erasure prevention detection hole 10 is closed by the plug body 5a and is integrally formed with the plug body 5a. Elastic piece 7
The convex portion 7a is engaged with one concave portion 11a. And
In the non-recordable state in which the erroneous erasure prevention plug 5 is pushed (shown by a chain double-dashed line in FIG. 4), the erroneous erasure prevention detection hole 10 closed by the plug body 5a is opened, and the convex portion 7a of the elastic piece 7 is The other concave portion 11b is engaged.

The convex portion 7a of the elastic piece 7 is the concave portion 11 on one side.
The erroneous erasure prevention plug 5 is caused by the frictional force based on the elasticity of the elastic piece 7 until it exits a and enters the other recess 11b (the same applies when exiting the other recess 11b and entering one recess 11a). Is prevented from moving easily due to vibration or the like to give the erroneous erasure prevention plug 5 a click feeling when sliding.

The sliding operation of the erroneous erasure prevention plug 5 for opening the erroneous erasure prevention detection hole 10 (recording disabled state) can be easily performed by, for example, the following operation. That is, in the opening 8, two exposed surfaces 5c,
It is only necessary to push the claw portion 5b of the accidental erasure prevention plug 5 having the exposed portion 5d or the vicinity thereof with the pad of the finger, whereby the accidental erasure prevention plug 5 can be slid very easily.

In this case, the opening 8 which is an erroneous erasure prevention display window
Is provided at the corner of the cassette body 1, and the opening 8
Since the two exposed surfaces 5c and 5d continuous from the back surface to the side surface of the erroneous erasure prevention plug 5 are exposed, the exposed surface 5
A finger pad can be applied to the slide-side exposed surface 5d of c and 5d. Thus, by pressing the exposed surface 5d of the erroneous erasure prevention plug 5 with the pad of the finger, the erroneous erasure prevention plug 5 can be easily slid. Therefore, the operability of the erroneous erasure prevention plug 5 for switching from the recordable state to the recordable state can be improved.

On the other hand, when the erasure prevention plug 5 is returned to the recordable state, the claw portion 5b is in close contact with one side of the opening 8 and the finger pad is claw portion 5b, as in the conventional example shown in FIG. Never get caught in. Therefore, the erroneous erasure prevention plug 5 cannot be easily moved, and it becomes necessary to hook it with a tool such as a fingernail or a screwdriver for sliding operation. Therefore, the operability for switching from the non-recordable state to the recordable state can be suppressed to a low level, and therefore the occurrence of erroneous operation of accidentally sliding the erroneous erasure prevention plug 5 to the recordable state can be reduced.

In the second embodiment shown in FIGS. 6 to 11, the accidental erasure prevention plug 13 is slidably mounted on the outer surface of the cassette body 12. As shown in FIGS. 6 to 10, the erroneous erasure prevention plug 13 is provided on the plug body 14 having a U-shaped continuous upper surface plate 14a, a rear surface plate 14b, and a lower surface plate 14c. And a pair of engaging claws 15a and 15b, which are integrally formed of an appropriate material such as synthetic resin or metal. The pair of engaging claws 15a and 15b have a wedge shape and are formed on the inner surfaces of the open ends of the upper plate 14a and the lower plate 14c, respectively. Further, the rear plate 14b has engaging claws 15a,
Two slits 16 extending in the same direction as 15b are provided, and thereby an elastic piece 17 is formed between the slits 16 and 16. Then, the inner surface of the elastic piece 17 on the tip side is provided with a convex portion 17a that prevents the elastic piece 17 from sliding easily and gives a click feeling when sliding.

The cassette body 12 is composed of an upper half 12a and a lower half 12b, and the cassette lid 2 is rotatably attached to the front part thereof, as in the first embodiment. As shown in FIGS. 6 to 9 and 11, a continuous U-shaped concave portion 18 is formed on the back surface of the cassette body 12 so as to extend over the three adjacent surfaces. This recess 1
Reference numeral 8 denotes an upper surface and a back surface formed on the upper half 12a, and a lower surface and a lower surface formed on the lower half 12b. Then, two recesses 20a and 20b, which are engaged with the protrusions 17a provided on the elastic piece 17 of the erroneous erasure prevention plug 13, are formed in the rear surface joint portion.
It is set to be separated for a predetermined period according to the slide amount of 3.

Further, a guide groove 21 extending in the lateral direction is formed in each of the upper and lower surfaces of the recess 18 of the cassette body 12.
a and 21b are formed. Then, as shown in a cross section in FIG. 9, engaging claws 15a, 15b provided on the inner surface of the opening side tip of the erroneous erasure prevention plug 13 mounted in the recessed portion 18 are respectively provided in these guide grooves 21a, 21b. Engaged. Further, an erroneous erasure prevention detection hole 10 that is opened and closed by the plug body 14 based on the sliding operation of the erroneous erasure prevention plug 13 is provided on the lower surface of the recessed portion 18 of the lower half 12b.

In the second embodiment having such a structure, the erroneous erasure prevention plug 13 is mounted on the outside of the cassette body 12, and the protrusion 17a provided on the elastic piece 17 is provided on the cassette body 12. The recesses 20a and 20b are engaged with one of the recesses 20a and 20b, whereby the erroneous erasure prevention plug 13 is held in one of the recordable state and the non-recordable state. Then, by sliding the erroneous erasure prevention plug 13 to the left or right, the erroneous erasure prevention detection hole 10 is opened or closed, and the above recording state is selected.

In this case, the continuous three surfaces of the erroneous erasure prevention plug 13 are exposed to the outside of the cassette body 12, and for example, the upper and lower two surfaces of the upper plate 14a and the lower plate 14c can be easily picked with fingers. Therefore, the erasure prevention plug 13
Since a force can be easily applied to the finger picked up, the erroneous erasure prevention plug 13 can be easily slid. Moreover, when the erroneous erasure prevention plug 13 is in the recordable state or the recordable state, the elastic piece 1
7 is provided with a convex portion 17a which is a concave portion 18 of the cassette body 12.
Since it engages with one of the two recesses 20a and 20b provided in the above, it does not move easily due to vibration or the like during transportation and slides the erroneous erasure prevention plug 13 only when a certain amount of force is applied. be able to. Therefore, the erroneous erasure prevention plug 13 can be slid only when it is intended to be switched, and there is no fear that the erroneous erasure prevention plug 13 will malfunction due to vibration or the like not intended to be switched.

Further, by making the plug body 14 of the erroneous erasure prevention plug 13 elastic, and pushing the erroneous erasure prevention plug 13 into the recess 18 with a certain amount of force, the upper surface plate 14a and the lower surface plate of the plug body 14 are pushed. Since it is elastically deformed with 14c, it can be easily attached to the cassette body 12. Moreover, after the mounting, the engaging claws 15a and 15b provided on the plug body 14 are engaged with the guide grooves 21a and 2 of the recessed portion 18.
The erroneous erasure prevention plug 13 cannot be easily removed because it enters the inside of 1b and is hard to be coupled out by these.

Note that, for example, as shown in FIG. 6, the cassette body 12 has a recordable state REC and a recordable state SAV.
By providing a symbol such as an arrow indicating the state on the erroneous erasure prevention plug 13 while providing a display indicating E, the recording state can be clearly shown. Therefore, it is possible to obtain an 8 mm video cassette or the like in which the recording state is easy to see. Further, reference numeral 22 shown in FIGS. 6 and 7 and the like denotes unevenness for preventing slippage.

As described above, the present invention is not limited to the above embodiment. For example, in the above second embodiment, the upper plate 14a to the rear plate 14b exposed in the recess 18 of the cassette body 1 are exposed. An example of the erroneous erasure prevention plug 13 having continuous exposed surfaces on three surfaces from the bottom plate 14c to the bottom plate 14c has been described.
It is also possible to have a structure having an exposed surface that is continuous to the two surfaces up to 4b or the back surface plate 14b to the lower surface plate 14c.

Furthermore, in the above embodiment, an example in which the recording medium is a magnetic tape 8 mm video cassette has been described, but in addition to this, for example, a floppy disk cassette (also referred to as a cartridge) in which the recording medium is a magnetic disk. .) Or a recording medium is an optical disk, and can be applied to an optical disk cassette or the like. in this way,
The present invention can be variously modified without departing from the spirit thereof.

[0031]

As described above, according to the present invention,
Since the exposed surface of the erroneous erasure prevention plug is exposed on two or more surfaces of the cassette body, it is possible to hang or pinch a finger pad on the exposed surface. Therefore, it is possible to easily move the erroneous erasure prevention plug by pushing or pinching the erroneous erasure prevention plug with a finger pad or the like, and it is possible to provide a cassette for a recording / reproducing device in which a slide operation is easy. Is obtained.

Further, by exposing the continuous exposed surfaces of the erroneous erasure prevention plugs in the openings continuous with the two adjacent surfaces of the cassette body, the erroneous erasure prevention plugs can be easily moved by the pad of the finger or the like. It is possible to obtain a cassette for a recording / reproducing device which can be easily slid.

Further, by exposing at least two continuous exposed surfaces of the plug main body on at least two adjacent surfaces of the cassette main body, the engaging claws provided on the plug main body are engaged with the guide grooves of the cassette main body. By accidentally pinching or hooking the exposed surface with a finger, the erroneous erasure prevention plug can be easily slid, and a cassette for a recording / reproducing apparatus in which the recording state is easy to see can be obtained.

[Brief description of drawings]

FIG. 1 is an external perspective view showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing an enlarged main part of FIG.

FIG. 3 is an exploded perspective view of FIG.

FIG. 4 is a plan view showing the same in a horizontal cross section.

FIG. 5 is a side view showing the same in a vertical cross section.

FIG. 6 is an external perspective view showing a second embodiment of the present invention.

FIG. 7 is a perspective view from below showing a recordable state by enlarging the main part of FIG. 6;

FIG. 8 is a perspective view from below showing a recording disabled state.

FIG. 9 is a side view showing the same in a vertical cross section.

FIG. 10 is a perspective view of an erroneous erasure prevention plug according to a second embodiment of the present invention.

11 is a perspective view showing a state in which an erroneous erasure prevention plug is removed in FIG.

FIG. 12 is an external perspective view showing a conventional 8 mm video cassette.

[Explanation of symbols]

 1,12 Cassette body 1a, 12a Upper half 1b, 12b Lower half 5,13 Accidental erasure prevention plug 5a, 14 Plug body 5b Claw portion 5c, 5d, 14a, 14b, 14c Exposed surface 7, 17 Elastic piece 7a, 17a Convex Part 8 Opening (wrong erasure prevention display window) 10 Wrong erasure prevention detection hole 11a, 11b, 20a, 20b Recess 15a, 15b Engaging claw 18 Recessed part 21a, 21b Guide groove

Claims (3)

[Claims] 1. The above-mentioned recording is provided by slidably providing an erroneous erasure prevention plug in a cassette body containing a recording medium, and sliding the erroneous erasure prevention plug to open an erroneous erasure prevention detection hole formed in the cassette body. In a cassette for a recording / reproducing apparatus for preventing erroneous erasure of information recorded on a medium, the erroneous erasure prevention plug has two or more exposed surfaces exposed on two or more surfaces of the cassette body. Cassette for playback device. 2. The cassette for a recording / reproducing apparatus according to claim 1, wherein the cassette body has an opening continuous to two adjacent surfaces, and the erroneous erasure prevention plug exposes the continuous two surfaces exposed to the opening. A cassette for a recording / reproducing apparatus having a surface. 3. The cassette for recording / reproducing apparatus according to claim 1, wherein the erroneous erasure prevention plug has a plug main body having an exposed surface continuous with at least two adjacent surfaces of the cassette main body.
A cassette for a recording / reproducing apparatus, comprising: an engaging claw provided in the plug body and engaging with a guide groove formed in the cassette body.