JPH0459697B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a recording disk reproducing device in which a record case containing a disk-shaped recording medium (record) is opened and inserted into and taken out from the device. be.

Structure of a conventional example and its problems FIGS. 1 to 3 show the structure of a record case that can be used in the recording disc playback device according to the present invention. The cover 3 is detachably connected to an opening 7 provided on the front side of the case 2 in the insertion direction _X1 into the device. The case 2 and the lid 3 are made of styrene resin, for example.

The case 2 is made up of a pair of halves 4 molded with the same mold and pasted together, and the interior has a flat record storage space 5 (height is equal to the thickness of the record 6) over its entire width and length. A record 6 (recording medium) is stored in this space 5. This space 5 has an opening 7 on the insertion direction _X1 side, and is closed on the remaining three sides. The constituent parts of the case 2 are arranged so that the same constituent parts are located at diametrically opposite positions when viewed from the direction of arrow _X1 with the center line l in the insertion direction as the center.

Each half 4 is comprised of a flat plate part 8 having recesses 17 on the left and right sides that serve as hinges when expanded, and protrusions 9, 10, 11 along the three edges. Looking at the lower half 4 in FIG. 1, there are windows 1 on the left and right sides near the opening 7 side of the flat plate portion 8 that are engaged with expansion arms to be described later.
2 is formed in the center of the vicinity of the opening 7, and an engagement hole 13 is formed in the center near the opening 7, into which a convex portion of the lid, which will be described later, is engaged. Further, a pair of tapered portions 14 are formed symmetrically on the edge of the opening 7. This is for guiding the insertion of the arm of the latching mechanism, which will be described later. Further, in the inner part, protrusions 15 are formed at positions shifted to the right and left from the center line l, with which the record 6 comes into contact. Further, on the inner surface of the protrusions 9 and 10 in the vicinity of the openings, there are recesses 16 into which a protrusion of the lid 3, which will be described later, engages.
is provided. The ridge body 4 formed in this way
is adhered to the entire circumference or a portion of the protruding portions 9, 10, and 11 to form the case 2.

At the end of the lid 3, there is a flange portion 1 that closes the opening 7 of the case 2 when the lid 3 is engaged and fixed to the case 2.
8, and symmetrically with respect to the center line l, a notch 19 into which an expanding arm described below can enter, a sloped portion 27 for guiding a disc holding arm in a playback device described later, and a glue guard for the record 6. A guide groove 20 having a thinner wall portion 28 is formed on both sides, and a convex portion 21 that engages with the hole 13 of the case 2 is formed on both sides on the center line l. Further, an inclined part 22 and a tapered part 23 are provided to guide the lid 3 when it enters the case 2, and a protrusion 24 that engages with the aforementioned recess 16 to fix the lid 3 to the case 2 is provided. It is provided on an arm 25 that utilizes the flexibility of resin, and a sloped portion 26 that engages with the release member of the lid 3 is provided at its tip.

FIG. 2 shows a state in which the record 6 and the lid 3 are assembled into the case 2. This state will be explained with reference to FIG. 1.
It comes into contact with and is locked in the depth direction, and is locked in the width direction by the protrusions 9 and 10. The lid 3 is
The protrusion 24 engages with the recess 16, and the protrusion 2
1 is engaged with the hole 13, thereby closing the opening 7 and coupling.

As a result, the record 6 is regulated by the arcuate portion 29 of the lid 3 also in the insertion direction _X1 , and is stored without falling out of the case 2. The thickness of the portion of the lid 3 that enters the case 2 is approximately the same thickness as the storage space 5 of the case 2, and the record 6 will not fall out of the gap.

FIG. 3 is a detailed view of the lid 3, and the shape of the side facing the record 6 is, for example, an arc with gaps b at both ends larger than gaps a in the center. This is to ensure stable operation even if the relative positions of the lid 3 and the record 6 deviate somewhat in the direction of arrow Z during a playback operation to be described later.

FIG. 4 is a schematic diagram of a conventional example of a recording disk reproducing apparatus using the above-mentioned cassette case. This playback device 50 includes an expansion mechanism 51 that expands the opening 7 of the case 2, a turntable 52 on which the record 6 is placed, a mechanism 53 that clamps the record 6, a mechanism 54 that latches the lid 3, and the like. have. The expansion mechanism 51 of the case 2 is located near the record case insertion opening 55 of the playback device 50, and is guided by guide rails 56 on both sides to move reversibly in the directions of arrows X ₁ and X ₂ . This expanding mechanism 51 is made up of an upper beam 57 and a lower beam 58 extending in the width direction of the playback device 50, and each beam 57, 58 is a movable body 51a sliding on the guide rail 56.
It is provided rotatably through rotational fulcrums 57b and 58b (see FIG. 5), and has a pair of expansion arms 59 and protrusions 57a and 58a formed to engage with the hole 13 of the case. are doing. When each of the beams 57, 58 is located near the record case insertion opening 55, the beams 57, 58 are inclined by the action of a coil spring or the like so that the expanding arms 59 of the beams 57, 58 are positioned together. The beams 57 and 58 are arranged so that the expansion mechanism 51 moves in the direction of _arrow According to
They each rotate horizontally, and the expansion arms 59 rotate vertically away from each other.

In such a configuration, the record case 1 is inserted into the playback device 5 through the insertion slot 56 with the lid 3 facing forward.
0, the closed expansion arm 59 opens into the lid 3.
The case expansion mechanism 51 moves in the direction of the arrow _X1 as the cartridge is inserted. Note that the expansion arm 59 enters into the case 2 reliably by the action of the tapered portion 14 provided in the opening 7 of the case 2. At this time,
The tips of the expanding arms 59 are located at positions corresponding to the windows 12 of the case 2, respectively. When the case expansion mechanism 51 moves, the expansion arms 59 rotate in the direction of opening each other, and the case 2 is pushed open with the protrusions 57a and 58a locked in the hole 13, and the case 2 is expanded. Thereafter, the case 2 is inserted in the direction of arrow _X1 in the expanded state.
Here, since the case 2 is provided with the recess 17 as described above, the above-mentioned expansion operation is performed in conjunction with the insertion operation with a relatively light force. Furthermore, in this state, since the aforementioned protrusion 24 of the lid 3 is engaged with the recess 16 of the case 2, even if the cartridge is pulled out halfway, the lid 3 will move together with the case 2, and only the lid 3 will remain in the playback device 50. Nothing is left in the middle. In addition, a turntable 52, a clamping mechanism 53,
The structure and operation of the lid latching mechanism 54 and other mechanisms are similar to the conventional example described in, for example, Japanese Patent Laid-Open No. 57-205853.

However, the conventional expansion mechanism 51 described above has the following problems. That is, the fifth
Figures A to D explain the operation of the expanding mechanism 51 in relation to the record case 1.
Although the operation of No. 1 is as described above, a step-by-step explanation will be given here to particularly clarify the problems that occur in the conventional example.

FIG. 5A shows the state before the case 2 comes into contact with the expansion mechanism 51. From this state, the case 2 comes into contact with the expansion mechanism 51 as shown by the arrow E, the beams 57 and 58 rotate in the direction of the arrow F by the action of the tapered portion 62 (see FIG. 4), and the case 2
expand.

FIG. 5B shows the state in the middle of expansion. In other words, the roller 61 in FIG. 4 is located at the midpoint of the tapered portion 62. In this state, the protrusions 57a and 58a are still in the hole 13 of the case 2.
is not locked. However, since the roller 61 is located in the middle of the tapered portion 62, it can be returned to the state shown in A by the action of the above-mentioned coil spring or the like.

Next, the expansion progresses further, and the fully expanded state is shown in FIG. 5C. In this state, case 2
Projections 57a and 58a are locked in the holes 13.

When used by a normal user, the above figure 5 A,
The expansion mechanism 51 operates as shown in (b) and (c).
Also, when removing the case 2, the expansion 51
It works completely in reverse, like Ha → Ro → I.
However, when the user inserts and takes out the record case 1 at an abnormally fast speed, the expanding mechanism 51 is moved near the insertion slot 55 so that the expanding mechanism 51 operates in the order of A → B → C, C → B → A. may be shaken. In such an operation, since the expansion mechanism 51 has a certain degree of inertia, the expansion mechanism 51 will run in the direction of arrow E due to the impact when the case 2 comes into contact with the expansion mechanism 51. , as shown in Fig. 5C, the hole 13 of the case 2 is completely
The protrusions 57a and 58a are not engaged with each other, resulting in the state shown in FIG. 5D. In other words, even though the case 2 is near the insertion port 55, the expansion mechanism 51
is located inside the playback device 50.

In this state, the roller 61 completely rides on the tapered portion 62, and the expansion mechanism 51 is forced to close the insertion opening 55 by the force of the aforementioned coil spring.
It is not possible to return to the vicinity of In this state, it is impossible to reinsert the case 2 and operate the expansion mechanism 51 normally, and in order to restore the normal state, the playback device 50 must be disassembled and repaired. In other words, once an abnormal situation like the one described above occurs, the user cannot restore the normal state, and the record cannot be played back. Of course, such an abnormal situation does not occur often, but once it occurs, it will cause a major failure, so it is a problem that must be solved in order to improve reliability.

OBJECTS OF THE INVENTION It is an object of the present invention to solve these problems and to dramatically improve the reliability of a playback device.

Structure of the Invention In order to achieve this object, the present invention provides a record case that has an opening at one end, has a storage space inside that can accommodate a disc-shaped recording medium, and has an engagement hole near the opening. In a recording disc playback device into which a record case consisting of a main body and a lid removably engages with the opening is inserted, the opening can be expanded in conjunction with the operation of inserting the record case into the device. At the same time, an expanding mechanism movable in the inserting direction of the record case is provided within the device, and this expanding mechanism has a movement blocking position that prevents movement of the expanding mechanism and a movement that allows movement of the expanding mechanism. It has a movement blocking mechanism that is movable between a blocking release position and an abutting end with which the edge of the opening can come into contact as the record case is inserted, and a contacting end with which the edge of the opening can come into contact. an engagement end capable of engaging with the engagement hole as a result of the abutting operation; and an engagement end capable of engaging with the movement prevention member in the movement prevention position to prevent displacement of the movement prevention member; The engaging member has an end portion that is disengaged from the movement prevention member as the edge of the member comes into contact with the abutting end.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below. 6 and 7 show the basic configuration of an embodiment of a recording disk reproducing apparatus according to the present invention. FIG. 6 shows an expansion mechanism 20 according to the present invention in place of the expansion mechanism 51 of the conventional example for the conventional reproduction device 50 described above.
An example in which 0 is combined is shown.

The expansion mechanism 200 is configured to move along a rail 201 fixed to the upper part of the turntable 52 of the playback device 50. 202 is a cam plate fixed to the side of the rail 201. 20
3 is a roller that rolls along the rail, and base 2
07 and is rotatably supported by a pin 204. Guide members 205 are fixed to both sides of the base 207 and serve to guide both sides of the case 2, and at the same time guide the playback device 5.
The expansion mechanism 200 engages with a wedge-shaped member 206 as a holding member fixed to the front plate 50a of the
When the expansion mechanism 200 is near the insertion opening 55, it serves to prevent the expansion mechanism 200 from shaking in the vertical direction, as shown in FIG. 8A.

208 is a slide plate as a movement prevention member, and pins 209 and 21 implanted in the base 207
0 and an elongated hole 208a, it is supported by the base 207 so as to be slidable only in the Z ₁ and Z ₂ directions in the figure. A roller 211 can come into contact with the cam plate 202, and is rotatably supported by the slide plate 208 by a pin 212. 213 is base 207
This is a coil spring placed between the slide plate 208 and the slide plate 208, and urges the slide plate 208 in the _Z1 direction in the figure. 214, the expansion member 215 is the slide plate 2
08, and is fixed to the slide plate 208. Expanding member 21
5 is rotatably supported by the base 207.
A support member 216 is fixed to the base 207. 217 is a latch as an engaging member that engages with the hole 13 of the case 2;
20, it is rotatably supported by a base 207 as shown by an arrow Y in the figure. The latch 217 is also biased in the direction of arrow Y by a spring 219.

FIG. 7 shows the configuration of the expansion mechanism 200 and the rail 201. The cross section of the rail 201 is C-shaped as shown in the figure. This shape can be easily manufactured by extruding aluminum, for example. As shown in the figure, the roller 203 has a V-shaped groove formed on its outer periphery, and this groove portion is connected to the guide portion 201a of the rail 201 and the roller 20
3 is starting to roll. 4 rollers 20
3 are guided in this way and arranged as shown in FIG.
can guide the movement of the case 2 from the front to the rear in a stable state in the X direction of the playback device 50.

The above is the general configuration of the playback device according to the present invention, and below, the operation of the expansion mechanism 200 will be mainly explained.

FIGS. 8A, 8B, and 8C are views of the movement of the expanding mechanism 200 seen from the top and front sides of the playback device 50, respectively. This figure shows the state before the case 2 is inserted into the playback device 50. C is an enlarged view of the P section of B. The roller 211 attached to the slide plate 208 is also urged in the Z ₁ direction because the slide plate 208 is urged in the Z ₁ direction, that is, in the movement prevention position by the coil spring 213. And by the action of the slope of the cam plate 202,
The entire expansion mechanism 200 is biased in the _X2 direction and pressed against the front plate 50a. Furthermore, even if the expansion mechanism 200 is pushed in the _X1 direction in the figure by some force in this state, the end 217a of the latch 217 and the notch 208b provided in the slide plate 208 will not engage with each other. Therefore, the slide plate 208 cannot move in the _Z2 direction in the figure, and therefore the roller 211 climbs the slope 202a and closes the expansion mechanism 2.
00 never moves in the _X1 direction. The record case 1 containing the record 6 or the empty record case 1 is inserted into the expanding mechanism 200 in this state. In the figure, a record case 1 in which a record 6 is stored is partially cut away. In this state, record case ₁ is
When inserted in this direction, the record case 1 is guided by the guide member 205 and comes into contact with the expanding member 215. Further, the expansion member 215 is attached to both the left and right lids 3.
Since the lid 3 and the expansion mechanism 215 are provided at a position corresponding to the notch 19, there is no interference between the lid 3 and the expansion mechanism 215. As shown in FIG.
4a, and the slide plate 208 is engaged with the slide plate 208 in the figure.
When it slides in the _Z2 direction, it rotates in the W direction in the figure about the fulcrum 222.

Next, the operations of the expanding member 215 and the latch 217 associated with the insertion of the record case 1 will be explained.
9A, 9B, and 9C are cross-sectional views of the expansion mechanism 200, illustrating the movements of the expansion member 215 and the latch 217 as the case 2 is inserted. Here, in order to make the figure easier to understand, the record 6 and the lid 3 are omitted. As shown in FIG. 9A, the latch 217
is urged by a spring 219 in the direction of arrow Y in the figure. In this state, since the notch 208b of the slide plate 208 and the end 217a of the latch 217 are engaged as described above, the slide plate 208
cannot move in the _Z direction. Expanding member 215
As shown in the figure, the case 2 is combined with a support member 216 to guide the case 2, and is configured to have a bullet-like side surface shape so that the case 2 can be easily expanded. Further, in the figure, 221 is a bearing, 222 is a fulcrum fixed to the expanding member 215, and the expanding member 215 is configured to be able to rotate as described above.

When the case 2 is pushed into the expanding member 215 in the _X1 direction and comes into contact with the expanding member 215, the case 2 is expanded along the slope of the expanding member 215 as shown in FIG. 9B. When the case 2 further advances in the _X1 direction, the lower part of the case 2 moves from the expansion member 215 to the support member 216.
and further expanded. Furthermore, case 2
When moves in the _X1 direction, latch 2 is released as shown in Figure 9
The end of the case 2 comes into contact with the contact end 217b of the latch 217, and the latch 217 rotates in the _Y2 direction in the figure. At the same time, the engaging end 217c of the latch 217 enters the hole 13 of the case 2 and locks the case 2. In this state, the case 2 is expanded as shown in the figure and supported by the expansion member 215 and the support member 216. Further, the engagement between the end 217a of the latch 217 and the notch 208b of the slide plate 208 is released, and the slide plate 208 can slide in the _Z2 direction.

When the case 2 is further pushed in, the slide plate 208 can slide in the _Z2 direction, that is, to the movement prevention release position, so the roller 211 in FIG. 8 can climb the slope 202a of the cam plate 202, and the expansion mechanism 200 is X ₁ with case 2
can move in the direction. In this state, as the slide plate 208 moves in the _Z2 direction, the latch 217 is locked by the slide plate 208 at the end 217a and is held in the state shown in FIG. and the engaging end 217 of the latch 217.
The engagement of c never comes off. As a result, by inserting the record case 1 into the device 50, the case 2 is moved within the playback device 50 while being expanded by the expansion mechanism 200.

FIG. 10A shows a state in which the roller 211 climbs the slope 202a as indicated by arrow Q in the figure.
In this state, as the slide plate 208 slides in the _Z2 direction, the expansion member 215 rotates in the W direction while keeping the case 2 expanded, and
As shown in FIG. In addition, FIG. 10C is an enlarged view of the N part of B.

When pulling out the record case 1, use the expansion mechanism 2.
The movement of 00 is completely opposite to the above explanation.
In other words, the expansion mechanism 200 is pulled by the case 2.
When the roller 211 moves in the _X2 direction and is applied to the slope 202a, the roller 211 descends the slope 202a due to the urging force of the coil spring 213, and the slide plate 208 slides in the _Z1 direction at the same time, as shown in FIG. Return to normal state. As a result, the latch 217, which was locked in the state shown in FIG. , the expansion 200 returns to its original state. At this time,
As shown in FIG. 11A, the guide member 205 engages with the wedge-shaped member 206 fixed to the front plate 50a, resulting in the state shown in FIG. For example, even if the playback device 50 falls while packed, no problem will occur. Furthermore, since there is little wobbling, the record case 1 can be inserted smoothly.

The above is a description of the embodiment of the expansion mechanism according to the present invention, but the configuration and operation of other parts of the playback device 50 are completely the same as those of the prior art example described above.

Effects of the Invention As described above, according to the present invention, after the case is expanded, the case advances to a predetermined position and the expansion mechanism can only move when the latch locks the case. There is no problem in which the case and the expansion mechanism become separated due to severe use by the user and the expansion mechanism runs independently as in the example above. Furthermore, the configuration of parts is simpler than in the conventional example. In other words, according to the present invention, the reliability of the playback device itself can be made perfect, and the structure is simple, so it is suitable for mass production.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing an example of a record case used in the present invention, Fig. 2 is a perspective view of the record case in a stored state, and Fig. 3 A, B, and C are the lids of the record case, respectively. 4A, 4B are partially cutaway perspective views showing the configuration of a conventional recording disc playback device, and FIGS. 6 is a partially cutaway perspective view showing the configuration of the recording disk reproducing apparatus according to the present invention, FIG. 7 is a cross-sectional view of the main part, and FIG. 8 A, B, and C are enlarged views. Figures 9A, 9B, and 9C are cross-sectional views illustrating the movement of the expansion member and latch as the case is inserted;
B and C are diagrams showing the expanded state of the case.
1A and 1B are views showing engagement between a holding member and a held member. DESCRIPTION OF SYMBOLS 1...Record case, 2...Record case body, 3...Lid, 5...Record storage space, 6...Record (recording medium), 7...Opening, 13...Engagement hole, 2
00... Expansion mechanism, 208... Slide plate (movement prevention member), 217... Latch (engaging member), 217a...
End portion, 217b...Abutment end, 217c...Engagement end.

Claims (1)

[Claims] 1. A record case body that has an opening at one end, has a storage space inside that can store a disk-shaped recording medium, and has an engagement hole near the opening, and is removably engaged with the opening. A record disc playback device that receives a record case having a lid that is inserted into the device, the opening portion being expandable in conjunction with the operation of inserting the record case into the device, and the record case being inserted into the device. An expansion mechanism is provided that is movable in the insertion direction of the expansion mechanism, and the expansion mechanism is movable between a movement prevention position that prevents movement of the expansion mechanism and a movement prevention release position that allows movement of the expansion mechanism. a contact end with which the edge of the opening can come into contact as the record case is inserted; and a contact end with which the edge of the opening comes into contact with the contact end. an engagement end capable of engaging with the hole; and an engagement end capable of engaging with the movement prevention member at the movement prevention position to prevent displacement of the movement prevention member, and abutting the edge of the opening with the abutment end. 1. A recording disk reproducing device comprising an engaging member having an end portion that is disengaged from the movement prevention member as the movement is performed.