JP3095455U - Disc player - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To efficiently incorporate a drive chassis into a housing. SOLUTION: On the other end of the front surface of a drive chassis 8, a positioning projection 26 having a projection length h substantially the same as each of the fixed cam shafts 10a and 10b and a horizontal level L substantially the same as each of the fixed cam shafts 10a and 10b is integrated. A pair of left and right pedestals 27 and 28 are provided at the front of the housing 2 so as to face the positioning protrusion 26 and the front one end side fixed cam shaft 10b. 2, the cam shafts 10a, 10b, and 17 are mounted on the respective cam holes of the cam plate 5 by mounting the positioning projections 26 and the fixed cam shaft 10b on the front end side on the receiving tables 27 and 28, respectively. 5a-5
c.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention is applicable to optical disks such as CDs and DVDs and magneto-optical disks (hereinafter referred to as disk (Hereinafter abbreviated as ") for playing, recording or erasing.

[0002]

[Prior art]

  Conventionally, as a technology of a disc player, there is one described in Patent Document 1 or the like. An example will be described with reference to FIGS. 8 to 10. This is a synthetic resin tray. (1) Open the rear surface at the rear part of the synthetic resin casing 2 in which the forward and backward movements a and b are arranged. A pair of left and right bearings 3 each having a substantially U-shaped cross section are provided, and a rear surface opening of each bearing 3 is provided. An elastic plate 4 for closing the portion is integrally formed with the housing 2, and a cam plate 5 is provided on the front portion of the housing 2. Can be slid left and right along the transverse direction orthogonal to the forward and backward directions a and b. Drive chassis 8 mounted with turntable 6 and optical pickup 7 A pair of left and right pivot shafts 9 are projectingly provided at the base ends of the drive chassis 8 and A pair of fixed cam shafts 10a and 10b are provided at the center portion of the surface and one end portion of the front surface, and The pivot shaft 9 is fitted into each bearing 3, and each fixed cam shaft 10a, 10b is attached to a cam plate. 5, the drive chassis 8 is inserted into the cam holes 5a, 5b It is incorporated in 2 so that it can be moved up and down around the pivot 9, e and f. In addition, in FIG. 10, 1 Reference numeral 3 is an intermediate gear pivotally mounted on the right end of the front cross girder portion 2a of the housing 2 so as to be capable of forward and reverse rotations g and h. The rack 14 is provided on the lower surface of the tray 1 so as to face the large diameter portion 13a of the intermediate gear 13. Are formed along the forward and backward directions a and b, and the upper part of the small diameter portion 13b of the intermediate gear 13 is formed. A rack 15 is formed at one end of the cam plate 5 so as to face the lower end of the small diameter portion 13b. The drive pinion 16 (see FIG. 11) can rotate on the front part of the drive chassis 8 facing each other. It is located in Noh. 17 is a left and right slide c on the front center of the drive chassis 8. , D is a movable cam shaft arranged so as to be capable of being fitted into the cam hole 5c of the cam plate 5. It In FIG. 9, reference numeral 18 denotes a top plate portion that is installed above the housing 2 so as to face the turntable 6. 2b is a disk holder with a magnet 20 that is vertically movable in a central storage portion 19 Then, the disc D on the tray 1 is clamped by the turntable 6 [see FIG. 9 (a)]. Teru].

[0003]   Explaining the unloading operation, as shown in the solid line of FIG. 8 and FIG. The feed motor 22 (see FIG. 3) drives the optical pin via the gear mechanism with clutch 23. Based on the unloading signal, with the back-up 7 returned to the start position. , The feed motor 22 slides the movable cam shaft 17 to the right through the gear mechanism 23. c, whereby the cam plate 5 is slightly slid in the same direction c and the rack 15 Is engaged with the small diameter portion 13b of the intermediate gear 13.

[0004]   Next, by the feed motor 22 through the gear mechanism 23 and the drive pinion 16. The intermediate gear 13 is normally rotated g. This allows the cam plate 5 to slide right c Allows the drive chassis 8 to be pivotally supported via the cam hole 5a and the right fixed cam shaft 10a. A downward movement e is performed around the shaft 9 (see FIG. 9B).

[0005]   Then, the engagement between the rack 15 and the small diameter portion 13b is released, and the engagement pin of the cam plate 5 is released. By engaging 24 (see FIG. 12) with the tray 1, the tray 1 is slightly The rack 14 is engaged with the large-diameter portion 13a of the intermediate gear 13 by advancing a and the phantom line in FIG. And as shown in FIG. 9 (b), the feed motor 22 drives the gear mechanism 23 and the drive pin. The tray 1 is moved forward a through the union 16, the intermediate gear 13 and the rack 14.

[0006]   The loading operation is almost the reverse of the above procedure, starting from the state shown in Fig. 9 (b). After the lay 1 is moved backward b, the cam plate 5 is slid to the left d and the cam hole 5a and the right The drive chassis 8 is moved upward f around both pivot shafts 9 via the constant cam shaft 10a. FIG. 9A]].

[0007]   The procedure of assembling the drive chassis 8 will be described. As shown in FIG. With the slide plate 5 slid to the left, turn the case 2 over and from the bottom side of the case 2. Insert the drive chassis 8 and press the pivot shafts 9 against the elastic plates 4, By elastically deforming the flexible plate 4 so that each pivot shaft 9 faces each bearing 3. In both cases, the drive chassis 8 is held in a substantially horizontal state, and the cam shafts 10a and 10b are , 17 are concentrically positioned in the cam holes 5a to 5c (see FIG. 12). Then, By moving the live chassis 8 forward a, the pivot shafts 9 are fitted into the bearings 3. At the same time, each cam shaft 10a, 10b, 17 is fitted into each cam hole 5a-5c.

[0008]

[Patent Document 1]   Japanese Unexamined Patent Publication No. 10-293993

[0009]

[Problems to be solved by the device]

  In the above conventional configuration, when the drive chassis 8 is incorporated into the housing 2, one of With each elastic plate 4 forcedly bent and elastically deformed by hand, dry with the other hand. By forcibly pushing the chassis 8 into the housing 2, the pivot shafts 9 are moved to the bearings 3 And the drive chassis 8 in a substantially horizontal state, each cam shaft 10 It is necessary to position a, 10b and 17 concentrically in each cam hole 5a to 5c. At the time of positioning, drive by elastic repulsive force due to elastic deformation of each elastic plate 4 Since the front part of the chassis 8 is easily tilted vertically and horizontally and its posture is unstable, The support shaft 9 is fitted into each bearing 3, and each cam shaft 10a, 10b, 17 is connected to each cam. It is troublesome and time-consuming to fit the holes 5a to 5c, and the workability of assembling is high. The rate is low.

[0010]   In view of the above-mentioned drawbacks, the present invention efficiently incorporates the drive chassis into the housing. It is an object of the present invention to provide a disc player capable of playing.

[0011]

[Means for Solving the Problems]

  In order to achieve the above object, the device according to claim 1 is arranged such that a tray can be moved forward and backward. A pair of left and right bearings, each of which has a substantially U-shaped cross section and whose rear surface is opened, are provided at the rear of the housing. At the same time, an elastic plate for closing the rear opening of each bearing is formed integrally with the housing. A cam plate can be slid along the transverse direction, which is orthogonal to the forward / backward direction, on the front of the housing Of the drive chassis, which is equipped with a turntable and an optical pickup. A pair of left and right pivot shafts are projectingly provided on the base end portion, and one is formed on the front surface of the drive chassis. A pair of fixed cam shafts and movable cam shafts are projected at a predetermined distance from each other and elastically plate each elastic plate. And each cam shaft is fitted into each bearing, and each cam shaft is attached to a cam plate. The drive chassis can be moved up and down in the housing by inserting it into the cam hole of It is built in and slides the cam plate in one direction based on the unloading signal. Drive chassis down through both pivots via each cam hole and each cam shaft. After that, the tray is moved forward, and based on the loading signal, the tray is moved backward. After that, slide the cam plate in the other direction and drive through each cam hole and each cam shaft. In a disc player that moves the chassis upward around both pivots, One of the fixed cam shafts is projected from the front end of the drive chassis. In addition, at the other end of the front surface of the drive chassis, the same protrusions as the fixed cam shafts are provided. Positioning projections, which are substantially the same horizontal level as the fixed cam shafts in projecting length, are integrally projected. , Facing the positioning protrusion and the fixed cam shaft on the front end side, and at the front of the casing. A pair of left and right pedestals are provided so that when the drive chassis is installed in the chassis, the front Place the positioning protrusion and the fixed camshaft on the front end side on each pedestal. Is characterized in that each cam shaft is positioned in each cam hole.

[0012]   The above configuration corresponds to one embodiment (see FIGS. 1 to 7), and According to the above, at the other end of the front surface of the drive chassis, the protruding length is almost the same as each fixed cam shaft. In addition, positioning projections of substantially the same horizontal level as the fixed cam shafts are integrally provided. The positioning projection and the fixed cam shaft on the front end on the pair of left and right pedestals. By placing them respectively, the front part of the drive chassis can The cam shaft can be easily positioned in each cam hole, and can be used for elastic deformation of each elastic plate. Even if there is elastic repulsion due to, each pivot shaft is fitted into each bearing and each cam shaft is It can be easily inserted into each cam hole to perform the assembling work efficiently. Since the fixed cam shaft on the front end is also used for positioning the drive chassis, The production cost is reduced by simplifying the shape of the drive chassis as much as it is also used. be able to.

[0013]   If the drive chassis is moved upward during loading, the drive chassis The front of the chassis abuts each cradle and the drive chassis rests in place. , By this, reproduction or recording or erasing with an optical pickup for the disc Can be performed quickly and accurately, and each pedestal has a drive chassis for loading. Since it also serves as the stationary member of the chassis, the structure is simplified by the amount The cost of production can be further reduced.

[0014]   According to a second aspect of the present invention, a rear surface is provided at a rear portion of a housing in which a tray is arranged so as to be able to move forward and backward. A pair of left and right bearings having a substantially U-shaped cross section with an opening An elastic plate for closing the surface opening is formed integrally with the housing, and a cam plate is provided at the front of the housing. The turntable is slidable along the transverse direction that is orthogonal to the forward and backward direction. And a pair of left and right pivots at the base end of the drive chassis equipped with an optical pickup. A shaft is provided so as to project, and a pair of fixed cam shafts and a movable cover are provided on the front surface of the drive chassis. And a shaft, which are projected at a predetermined distance from each other, elastically deform the elastic plates to support the pivots. Insert the shafts into the bearings and the cam shafts into the cam holes of the cam plate. The drive chassis is incorporated in the chassis so that it can move up and down. Based on the loading signal, slide the cam plate in one direction to Move the drive chassis downward around both pivots via the camshaft and then advance the tray. Then, based on the loading signal, move the tray backward and then move the cam plate in the other direction. Slide the drive chassis around both pivots through each cam hole and each cam shaft. In a disc player that is designed to be moved up by Drive is installed on the pedestal when the drive chassis is installed in the chassis. Position each cam shaft in each cam hole by placing the front part of the chassis. It is characterized by having done.

[0015]   According to the above configuration, when the drive chassis is assembled in the housing, each elastic plate is The drive chassis is almost completely immersed in water with the pivot shafts facing each bearing. When positioning each cam shaft concentrically in each cam hole in a flat state, the drive shaft Place the front part of the chassis on the pedestal to stabilize the posture of the drive chassis. Therefore, even if there is an elastic repulsive force due to elastic deformation of each elastic plate 4, As well as fitting it into the bearing, it is easy to fit each cam shaft into each cam hole for assembly work. You can do it efficiently.

[0016]   If the drive chassis is moved upward during loading, the drive chassis The front of the chassis abuts each cradle and the drive chassis rests in place. , By this, reproduction or recording or erasing with an optical pickup for the disc Can be performed quickly and accurately, and each pedestal has a drive chassis for loading. Since it also serves as the stationary member of the chassis, the structure is simplified by the amount The cost of production can be further reduced.

[0017]   A third aspect of the present invention is the device of the second aspect, wherein the drive chassis is provided. At the front end of the chassis, one of the fixed cam shafts is projected and At the other end of the front face of the live chassis, the fixed cam shafts with substantially the same protruding length are Positioning protrusions that are almost the same horizontal level as the constant cam shaft are provided so as to project A pair of left and right pedestals are provided so as to face the protrusion and the fixed cam shaft on the front end side. When the drive chassis is installed in the housing, the positioning protrusion and the front end Place the fixed side cam shafts on the pedestals so that each cam shaft The feature is that it is positioned.

[0018]   According to the above structure, the fixed cam shafts are almost the same on the other end of the front surface of the drive chassis. Positioning protrusions of one protrusion length and almost the same horizontal level as the fixed cam shafts are integrally projected. Therefore, the positioning protrusion and the front end one end side fixed cam shaft are paired to the left and right. By placing each on the pedestal, the front part of the drive chassis is almost horizontal And each cam shaft can be easily positioned in each cam hole. Since the fixed cam shaft on one end side is also used for positioning the drive chassis, It is possible to reduce the manufacturing cost by simplifying the shape of the drive chassis as much as it is used. it can.

[0019]

[Embodiment of device]

  1 to 3 show a disc player which is an embodiment of the present invention. Then, a positioning protrusion 26 is integrally provided on the right end of the front surface of the drive chassis 8. Opposed to the positioning protrusion 26 and the left fixed cam shaft (fixed cam shaft on the front end side) 10b Then, a pair of left and right pedestals 27 and 28 are provided. In addition, 29 is the cam plate 5 and the front side A spring having a weak biasing force interposed between the cross girder portion 2a and the right slide c or What prevents the left slide d cam plate 5 from unexpectedly sliding in the opposite direction Is.

[0020]   The pedestals 27 and 28 are integrally provided on the front cross girder portion 2a of the housing 2, and When incorporating the live chassis 8 into the housing 2, the positioning protrusion 26 and the left fixing cover The front portion of the drive chassis 8 is supported via the shaft 10b and the loading is performed. At this time (see FIG. 9A), if the drive chassis 8 is moved upward f, the drive chassis 8 is moved. The front portion of the chassis 8 is brought into contact with the respective pedestals 27 and 28, and the drive chassis 8 is located Since the disc is stopped at a fixed position, the optical D pickup 7 plays back or writes to the disc D. Recording or erasing can be performed quickly and accurately.

[0021]   As shown in FIG. 7, the positioning protrusions 26 are provided on the fixed cam shafts 10a and 10b. And the same horizontal level L as the fixed cam shafts 10a and 10b with a projection length h that is substantially the same as The positioning protrusion 26 and the left fixed cam shaft 10b are attached to the receiving bases 27, 28. In front of the drive chassis 8 by mounting them on each [see FIG. 6 (c)]. With each part held in a substantially horizontal state, each cam shaft 10a, 10b, 17 is connected to each cam hole 5a- 5c can be easily positioned (see FIG. 7).

[0022]   As shown in FIGS. 4 and 5, the bearing 3 is laterally mounted on a support frame 30 formed integrally with the housing 2. It is formed in a substantially U-shaped cross section and has an opening 3a formed in its rear surface. As shown by the phantom line, the pivot 9 is pressed against the elastic plate 4 to elastically deform the elastic plate 4. By making the pivot shaft 9 face each bearing 3 by making the drive chassis 8 By advancing a, the pivot shaft 9 is fitted into the bearing 3 (see solid lines in FIG. 4 and FIG. 5). reference).

[0023]   The unloading operation and the loading operation according to the above configuration will be described with reference to FIGS. Since it is almost the same as the conventional example shown in FIG.

[0024]   The procedure of assembling the drive chassis 8 will be described. As shown in FIG. With the plate 5 slid to the left d, turn the case 2 over and turn the case 2 from the bottom side. Insert the live chassis 8 and press the pivot shafts 9 against the elastic plates 4, By elastically deforming the plate 4, it is possible to make each of the pivot shafts 9 face the bearings 3. In addition, the positioning protrusion 26 and the left fixed cam shaft 10b are respectively placed on the pedestals 27 and 28. The drive chassis 8 is held in a substantially horizontal state by placing it on each cam. The shafts 10a, 10b, 17 are concentrically positioned in the cam holes 5a-5c (see FIG. 7). ). Then, the drive chassis 8 is moved forward a to move the pivot shafts 9 into the respective axes. The cam shafts 10a, 10b and 17 are fitted in the receiving plate 3 and the cam holes 5a to 5c. (See FIG. 10).

[0025]

[Effect of device]

  According to the invention as set forth in claim 1, it is shown in one embodiment (see FIGS. 1 to 7). At the other end of the front face of the drive chassis with the same protruding length as each fixed cam shaft. Since the positioning projections of the same horizontal level as the fixed cam shafts are integrally projected. , The positioning protrusion and the fixed cam shaft on the front end side on the pair of left and right pedestals, respectively. By placing it on the front of the drive chassis, the front The shaft can be easily positioned in each cam hole, and the elastic deformation of each elastic plate 4 causes Even if there is an elastic repulsion force, each pivot shaft is fitted into each bearing and each cam shaft It can be easily inserted into the cam hole to perform the assembling work efficiently. Since the fixed cam shaft on one end side of the surface is also used for positioning the drive chassis, The manufacturing cost can be reduced by simplifying the shape of the drive chassis as much as You can

[0026]   If the drive chassis is moved upward during loading, the drive chassis The front of the chassis abuts each cradle and the drive chassis rests in place. , By this, reproduction or recording or erasing with an optical pickup for the disc Can be performed quickly and accurately, and each pedestal has a drive chassis for loading. Since it also serves as the stationary member of the chassis, the structure is simplified by the amount The cost of production can be further reduced.

[0027]   According to the invention of claim 2, when the drive chassis is assembled in the housing, With each elastic plate elastically deformed and each pivot shaft facing each bearing, When positioning each camshaft concentrically in each cam hole with the chassis almost horizontal, By placing the front part of the drive chassis on the pedestal, Since the posture is stable, even if there is an elastic repulsive force due to elastic deformation of each elastic plate 4, Fit each pivot shaft into each bearing and easily fit each cam shaft into each cam hole. , The embedded work can be performed efficiently.

[0028]   If the drive chassis is moved upward during loading, the drive chassis The front of the chassis abuts each cradle and the drive chassis rests in place. , By this, reproduction or recording or erasing with an optical pickup for the disc Can be performed quickly and accurately, and each pedestal has a drive chassis for loading. Since it also serves as the stationary member of the chassis, the structure is simplified by the amount The cost of production can be further reduced.

[0029]   According to the third aspect of the present invention, each fixed cover is attached to the other front end of the drive chassis. Positioning protrusions that have substantially the same protrusion length as the horizontal axis and approximately the same horizontal level as the fixed cam shafts. Since the part is integrally projected, the positioning protrusion and the fixed cam shaft on the front end side The front part of the drive chassis by placing the Each cam shaft can be easily positioned in each cam hole by making it almost horizontal, In addition, the fixed cam shaft on the front end side is also used for positioning the drive chassis. Therefore, the manufacturing cost is reduced by simplifying the shape of the drive chassis as much as it is also used. You can do it.

[Brief description of drawings]

FIG. 1 is a plan view of a disc player according to an embodiment of the present invention.

FIG. 2 is a perspective view of the same housing.

FIG. 3 is a rear view of the same chassis and a drive chassis incorporated therein.

FIG. 4 is an enlarged horizontal sectional view of the bearing.

5 is a view on arrow AA of FIG. 4. FIG.

6 (a) and 6 (b) are schematic plan views showing an assembling procedure of the drive chassis, and FIG. 6 (c) is a BB arrow view of FIG. 6 (a).

FIG. 7 is an exploded perspective view showing a positional relationship between each cam shaft and each cam hole.

FIG. 8 is a schematic plan view showing a conventional example.

FIG. 9A is a schematic vertical sectional view in a loading state,
(B) is a schematic longitudinal sectional view in an unloading state.

FIG. 10 is a view on arrow CC of FIG. 9 (a).

11A and 11B are schematic plan views showing a procedure of assembling the drive chassis.

FIG. 12 is an exploded perspective view showing a positional relationship between each cam shaft and each cam hole.

[Explanation of symbols]

1 tray 2 housing 3 bearings 4 elastic plate 5a-5c Cam hole 6 turntable 7 Optical pickup 8 drive chassis 9 pivots 10a Right fixed cam shaft 10b Left fixed camshaft (fixed camshaft on the front end side) 17 Movable cam shaft 26 Positioning protrusion 27, 28 cradle h Projecting length of positioning protrusion L Positioning protrusion horizontal level

Claims (3)

[Scope of utility model registration request] 1. A pair of left and right bearings each having a substantially U-shaped cross section and having a rear surface opened are provided at a rear portion of a housing in which a tray is arranged so as to be able to move forward and backward, and a rear surface opening portion of each of the bearings is closed. An elastic plate is formed integrally with the housing, and a cam plate is slidably arranged at a front portion of the housing along a transverse direction orthogonal to the forward-backward traveling direction.The base of a drive chassis equipped with a turntable and an optical pickup. A pair of left and right pivotal shafts are provided at the ends of the drive chassis, and a pair of fixed cam shafts and movable cam shafts are provided at the front surface of the drive chassis at predetermined intervals to elastically deform the elastic plates. The drive chassis is vertically movably incorporated in the housing by fitting the respective pivot shafts into the bearings and fitting the cam shafts into the cam holes of the cam plate. Based on cam Slide the plate in one direction to move the drive chassis downwards around both pivots through each cam hole and each cam shaft, then move the tray forward, and based on the loading signal, move the tray backward and then move the cam. In a disc player in which a plate is slid in the other direction to move the drive chassis upward around both pivots through each cam hole and each cam shaft, both fixed cams are provided at one end of the front face of the drive chassis. One of the shafts is provided in a protruding manner, and a positioning protrusion having substantially the same protrusion length as the fixed cam shafts and substantially the same horizontal level as the fixed cam shafts is integrally formed at the other end of the front surface of the drive chassis. A pair of left and right pedestals are projectingly provided on the front part of the housing so as to face the positioning projections and the fixed cam shafts on the one end side of the front surface. Disc player, characterized in that each cam shaft by placing each positioning protrusion and the front end side fixed cam shaft on each cradle was to position the respective cam holes. 2. A pair of left and right bearings, each having a substantially U-shaped cross section and having a rear surface opened, are provided at a rear portion of a housing in which a tray is arranged so that the tray can move forward and backward, and the rear surface opening portions of the respective bearings are closed. An elastic plate is formed integrally with the housing, and a cam plate is slidably arranged in the front part of the housing along a transverse direction orthogonal to the forward-backward traveling direction.The base of a drive chassis equipped with a turntable and an optical pickup. A pair of left and right pivotal shafts are provided at the ends of the drive chassis, and a pair of fixed cam shafts and movable cam shafts are provided at the front surface of the drive chassis at predetermined intervals to elastically deform the elastic plates. The drive chassis is vertically movably incorporated in the housing by fitting the respective pivot shafts into the bearings and fitting the cam shafts into the cam holes of the cam plate. Based on cam Slide the plate in one direction to move the drive chassis downwards around both pivots through each cam hole and each cam shaft, then move the tray forward, and based on the loading signal, move the tray backward and then move the cam. In a disc player in which a plate is slid in the other direction to move a drive chassis upward around both pivotal shafts through respective cam holes and respective cam shafts, a pedestal is projectingly provided at a front portion of the casing. A disc player characterized in that when the drive chassis is incorporated in a housing, each cam shaft is positioned in each cam hole by placing a front portion of the drive chassis on the pedestal. 3. A front end portion of the drive chassis,
One of the two fixed cam shafts is provided so as to project, and the other end of the front surface of the drive chassis is positioned at substantially the same horizontal level as the fixed cam shafts and has substantially the same protruding length as the fixed cam shafts. The protrusion is integrally projected, and the pair of left and right pedestals are protruded so as to face the positioning protrusion and the fixed cam shaft on the front end side, and when the drive chassis is assembled in the housing, the positioning protrusion is provided. 3. The disc player according to claim 2, wherein the fixed cam shafts on the one end side of the front surface are respectively placed on the respective pedestals so that the respective cam shafts are positioned in the respective cam holes.