JP3315604B2 - Magnetic device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a magnetic device for moving a cassette containing a recording medium on which information is recorded to a predetermined position, mounting the cassette, and extracting information from the recording medium.

[0002]

2. Description of the Related Art Conventionally, a video tape recorder (hereinafter abbreviated as "VTR") generally used in households as one of magnetic devices for recording and reproducing images, for example, has a video tape cassette (hereinafter simply referred to as "cassette"). The cassette is used to record and reproduce a video such as a television broadcast. As a cassette mounting method at that time, a front insertion mounting method (front loading method) has been adopted in most VTRs in recent years.

In such a conventional VTR, a schematic configuration of a cassette mounting portion for mounting a cassette at a recording / reproducing position for recording / reproducing a video such as a television broadcast as information will be described below.

FIG. 4 is a schematic structural view of the vicinity of a cassette mounting portion in a VTR which is a conventional magnetic device. As shown in FIG. 4, the cassette mounting section 1 is disposed at the back of the cassette insertion slot 3 formed on the front panel 2 and stores video information and audio information on a metal mechanism board 4. Cassette 5 containing magnetic tape as recording medium for recording
Holding unit 6 that moves to a recording / reproducing position where information can be recorded / reproduced while holding the oscillating shaft,
The cassette holder 6 is driven so that the cassette holder 6 moves in the direction shown by the arrow Y1 via the engaging portion 8 that engages with the projection 6a formed on the cassette holder 6 by swinging as shown in FIG. The cassette 5 is mounted at the recording / reproducing position by moving the cassette holding unit 6 in the direction indicated by the arrow Y1.

[0005] In the above configuration, the holding / moving drive section 9 includes:
Through a gear 10 formed on the shaft core J1, a drive transmission bar 12 having an arc-shaped rack 11 formed so as to mesh with the gear 10 is engaged.
2 is driven by a motor to move in the direction indicated by arrow Y2 and the gear 10 is driven to rotate, so that the swing shaft 7 is
Rocks as

[0006] The cassette mounting section 1 configured as described above.
Will be described below. Here, the schematic operation of the cassette mounting unit 1 from the state before the cassette insertion (that is, the state where the cassette 5 is removed) to the state where the cassette mounting is completed (that is, the state where the cassette 5 is mounted at the recording / reproducing position). Will be described.

[0007] As shown in FIG.
When it is inserted into the cassette holding section 6 as shown by, the state is detected and the drive transmission bar 12 slides in the direction of arrow Y4 by rotation of a motor (not shown). The slide of the drive transmission bar 12 causes the drive transmission bar 1
The gear 10 of the holding / moving drive unit 9 meshing with the second arc-shaped rack 11 rotates, and at the same time, the holding / moving drive unit 9 swings in the direction of arrow Y5 with the swing shaft 7 as the axis J1 as shown in FIG. Move.

The swing of the holding / moving drive unit 9 causes the cassette holding unit 6 holding the cassette 5 to have its projection 6a engaged with the engaging portion 8 of the holding / moving drive unit 9. The protrusion 6a and the protrusion 6b are respectively
While moving along the guide groove 14a and the guide groove 14b formed in the direction indicated by the arrow Y6. A guide groove similar to the guide groove 14a and the guide groove 14b is also formed on the side plate 13, and the protrusion 6a
The same applies to the projection 6b.

In this manner, the cassette holding portion 6 holds the cassette 5 placed on the cassette receiving portion 6c, and the first position (in FIG. 4, the solid line in FIG. 4) in the state where the cassette 5 is taken out. From the same position as the position (indicated by the dotted line in FIG. 4) from the same position as the position indicated by the dotted line in FIG. , The cassette 5 is mounted at a position where the cassette 5 can be driven with respect to the magnetic tape therein, that is, at a recording / reproducing position,
For example, video information and audio information in a television broadcast can be recorded or reproduced on the magnetic tape in the cassette 5.

In the above description, when the cassette holding portion 6 is at the second position, the cassette receiving portion 6c allows the pull-out post P1 to pull out the magnetic tape from the cassette 5 along the post guide groove 4a with an arrow Y7. In order not to hinder the movement in the direction shown, the cassette receiving portion 6c is cut off at a portion overlapping the moving range of the drawer post P1.

In recent years, resin molded products have been used for the side plates 13 and 14 in order to reduce the weight of the entire apparatus, and in addition, the thickness has been further reduced in order to reduce the size and cost of the apparatus. .

[0012]

However, in the conventional magnetic device as described above, when the cassette holding portion 6 is at the second position, the cassette receiving portion 6c is pulled out as shown in FIG. Since the cassette receiving portion 6c is partially cut away so as not to hinder the movement of the post P1, when the cassette holding portion 6 is at the first position, as shown in FIG.
When there is no member overlapping the cassette holding portion 6 from the upper surface of the cassette holding portion 6 to the vicinity of the upper surface of the substrate 4 below the above.

Further, in recent years, resin molded products have been used for the side plates 13 and 14 in order to reduce the weight of the entire apparatus, and in addition, the thickness has been further reduced in order to reduce the size and cost of the apparatus. As shown in FIG. 7, the degree of engagement between the projections 6a and 6b of the cassette holding portion 6 and the guide grooves 14a and 14b of the side plate 14 is small.

Therefore, when the cassette 5 is not inserted into the apparatus and the cassette holding section 6 is at the first position,
That is, for example, when the device is dropped on the floor during the delivery of the device or when the user removes the cassette 5 from the device and is not in use, for example, if the device is dropped on the floor, the device may be dropped to the device in a short time. As shown in FIG. 6, a large acting force is applied to the cassette holding portion 6 with an arrow Y10.
A large acceleration gravitational force G acts as shown by the arrow, and the cassette receiving portion 6c of the cassette receiving portion 6c is curved as shown by a two-dot chain line.
Have come off the guide grooves 14a and the guide grooves 14b of the side plate 14 and fall on the substrate 4, so that the cassette 5 cannot be inserted into the apparatus and becomes unusable.

The present invention solves the above-mentioned conventional problems, and a cassette generated by an impact at that time even if the apparatus falls during delivery of the apparatus or when the apparatus is not in use. Provided is a magnetic device capable of preventing a holding portion from falling off and preventing a cassette from being inserted into a device and becoming unusable.

[0016]

In order to solve the above-mentioned problems, according to the magnetic apparatus of the present invention, when the cassette holding portion is at the first position, the cassette receiving portion is viewed from the upper surface of the cassette holding portion. Are partially overlapped with a certain area of the reel base, and when the cassette receiving part is moved to the second position, the cassette receiving portion is not obstructed by the movement of the drawer post.

As described above, even when the apparatus falls during delivery of the apparatus or when the apparatus is not used by the user, it is possible to prevent the cassette holder from falling off due to the impact at that time. Can be prevented from being unusable due to being unable to be inserted into the device.

[0018]

A magnetic device according to a first aspect of the present invention includes a cassette holding portion for holding a cassette containing a recording medium on which information is recorded while receiving the cassette from below, on a substrate. In a state where the cassette holding unit holds the cassette mounted on the cassette receiving portion, the second position when the recording medium can be driven by the rotationally driven reel base from the first position when the cassette is taken out. In the magnetic device for mounting the cassette at a position where the cassette can be driven with respect to the recording medium by moving the cassette holding portion, when the cassette holding portion is at the first position, a part of the cassette receiving portion is located on the reel base. When the recording medium is located at the upper position and is at the second position, the recording medium is pulled out of the cassette by the cassette receiving portion. It came out to construct such that it does not interfere with the operation of pulling out the post.

According to this configuration, when the cassette holding portion is at the first position, a part of the cassette receiving portion is overlapped with a certain range of the reel base when viewed from the top surface of the cassette holding portion, and the second position is set. When the cassette is moved to the position, the cassette receiving portion is not hindered from moving the drawer post.

Hereinafter, a magnetic device according to an embodiment of the present invention will be described in detail with reference to the drawings, taking a general household VTR described in the conventional example as an example. FIG.
FIG. 1 is a schematic configuration diagram of a vicinity of a cassette mounting portion in a VTR which is one of the magnetic devices of the present embodiment.

The overall configuration of the cassette mounting portion is basically the same as that of the conventional example shown in FIG. In other words, as shown in FIG. 1, the cassette mounting section 20 has a recording medium on which video information and audio information are recorded on a metal substrate 4 configured to serve as a base, for example, a magnetic tape. 5 (indicated by a two-dot chain line in order to make the structure of the mechanism part easy to understand) received from below and held, and the information on the recording medium, that is, the magnetic tape Cassette holder 21 which moves to a recording / reproducing position where recording / reproducing is possible
And the swinging shaft 7 is pivoted about the axis J1, so that the cassette holding portion 21 is moved in the direction shown by the arrow Y1 via the engaging portion 8 which engages with the projection 21a formed on the cassette holding portion 21. A holding movement driving unit 9 for driving the cassette holding unit 21 so as to move is provided.

Then, with the cassette holder 21 holding the cassette 5 placed on the cassette receiving portion 21c, the cassette holder 21 is rotated from the first position (indicated by a solid line in FIG. 1) when the cassette 5 is taken out. The second position (indicated by a two-dot chain line in FIG. 1) in a state where the magnetic tape can be driven by the driven reel base L1.
(The cassette 5 is a recording / reproducing position at which information can be recorded / reproduced on / from the magnetic tape) by moving the cassette 5 to a position where it can be driven / recorded / reproduced with respect to the magnetic tape. It is configured to be worn.

In this VTR, the cassette holder 2
1, when a part of the cassette receiving part 21c is located above the reel base L1 as shown in FIG. 2 when it is at the first position, and when it is at the second position, the cassette receiving part 21c As shown in FIG. 1, in order not to hinder the tape pull-out operation of the pull-out post P1 for pulling out the tape from the cassette 5,
The projection T1 is formed on the cassette receiving portion 21c by expanding the cassette receiving portion 21c to a range corresponding to a position above the reel base 1.

The protrusion T1 is formed in such a size that the protrusion T1 does not hinder the tape pull-out operation of the pull-out post P1 when the cassette holder 21 is at the second position. I have.

According to the above configuration, as shown in FIG.
When the cassette holding portion 21 is at the first position, the projection T1 of the cassette receiving portion 21c is overlapped with a certain range of the reel base L1 when viewed from the top surface of the cassette holding portion 21. When moved, the cassette receiving portion 21c can be prevented from obstructing the movement of the drawer post P1 in the direction of the arrow Y7.

Here, FIGS. 2 and 3 are drawings for making it easier to understand the positional relationship between the cassette receiving portion 21c and the reel base L1 when the cassette holding portion 21 is at the first position. Seeing them together also makes them easier to understand.

As described above, even if the apparatus falls during delivery of the apparatus or when the apparatus is not used by the user, it is possible to prevent the cassette holder from dropping off due to the impact at that time. Can be prevented from being unusable due to being unable to be inserted into the device.

As a result, the side plate that engages with the cassette holding portion can be further reduced in thickness, and the size and weight of the apparatus and the cost can be further reduced.

[0029]

As described above, according to the present invention, when the cassette holding portion is at the first position, a part of the cassette receiving portion is located within a certain range of the reel base when viewed from the top surface of the cassette holding portion. And when the cassette is moved to the second position, the cassette receiving portion can be prevented from obstructing the movement of the drawer post.

Therefore, even if the apparatus is dropped during delivery of the apparatus or when the apparatus is not used by the user, it is possible to prevent the cassette holder from dropping off due to an impact at that time, and the cassette can be removed. It is possible to prevent the device from being unusable due to being unable to be inserted into the device.

As a result, the side plate that engages with the cassette holding portion can be further reduced in thickness, and the size and weight of the apparatus and the cost can be further reduced.

[Brief description of the drawings]

FIG. 1 is a main part configuration diagram of a VTR which is a magnetic device according to an embodiment of the present invention.

FIG. 2 is a side sectional view showing a main part configuration of the embodiment.

FIG. 3 is a perspective view showing a main part configuration of the embodiment.

FIG. 4 is a configuration diagram of a main part of a VTR that is a conventional magnetic device.

FIG. 5 is a side sectional view showing a configuration of a main part of the conventional example.

FIG. 6 is a front view showing a configuration of a main part of the conventional example.

FIG. 7 is a perspective view showing a configuration of a main part of the conventional example.

[Explanation of symbols]

 21 Cassette holding part 21c Cassette receiving part L1 Reel stand P1 Pull-out post T1 Projecting part

Claims (1)

(57) [Claims] 1. A cassette holding section for holding a cassette containing a recording medium on which information is recorded, from below, on a substrate, wherein the cassette holding section is mounted on the cassette receiving section. With the cassette held, from the first position when the cassette is taken out,
In a magnetic device for mounting a cassette at a position where the cassette can be driven relative to the recording medium by moving to a second position when the rotationally driven reel base can be driven relative to the recording medium, the cassette holding unit includes When the cassette receiving portion is at the first position, a part of the cassette receiving portion is located above the reel base, and when the cassette receiving portion is at the second position, the drawer post for pulling out the recording medium from the cassette is performed by the cassette receiving portion. A magnetic device configured to not interfere.