JPS6011361B2 - record player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cord player, and particularly to a record player in which a record is sucked onto a turntable by a suction action such as a suction pump. It is an object of the present invention to provide a cord player that can be manufactured at low cost by forming a suction port on the center side of the table and a suitable ventilation passage, and also allows the use of a turntable with a flat top surface. do.

The cutting device is configured to attract the lacquer disk onto a turntable in order to perform the cutting operation accurately.

The turntable of this device has the structure shown in FIGS. 1 and 2, and the suction operation is performed in the state shown in FIG. 3.
The turntable 1 is formed by combining a turntable main body 2 and a central member 7, and the turntable main body 2 has a plurality of concentric grooves 3a divided into four in the circumferential direction on the upper surface.
~3d, 4a~4d, 5a~5d, 6a~6d are formed, and each groove divided in the circumferential direction is fitted through a hole. Further, the grooves 3a to 3d extend in the radial direction through the lotus passage holes 3e, the grooves 4a to 4d through the lotus passage holes 4e, the grooves 5a to 5d through the lotus passage holes 5e, and the grooves 6a to 6d through the passage holes 6e, respectively. It communicates to the periphery of the central member 7. The center member 7 has a plurality of grooves formed on its circumferential surface, and can be rotated and fixed in any direction, and is connected to the hole 9 in the spindle 8 and the above-mentioned transport holes 3e, 4e,
5e and 6e are selectively combined. As shown in FIG. 3, the turntable 1 is fixed on a rotating table 10.
The lacquer disc 11 is placed on a turntable top plate 12 that has been remounted on the turntable 1.

This upper plate 12 has a large number of concentric grooves 1 separated from each other.
3, and a through hole 14 is bored at the bottom of each groove. When the cap 15 is attached to the spindle 8 and a suction pump (not shown) is driven, the air on the upper plate 12 is
The lacquer disc 11 is suctioned onto the top plate 12 by suction through the through hole 14, the plurality of grooves 3a to 3d, etc., the lotus through hole 3e, etc., and further through the spindle hole 9. In the above configuration device, the turntable main body 2, the center village 7, the upper plate 12, and the rotary table 10 are all made of metal, and since high precision is required, they are manufactured by cutting with a lathe or the like.

As a result, the weight of the device becomes considerably large, and the manufacturing cost becomes extremely high, so that it cannot be applied to a general record player with the above structure.
Therefore, it has been desired to realize a cord suction mechanism that can be applied to general record players. The present invention satisfies the above-mentioned requirements, and each embodiment thereof will be described below with reference to the drawings.

FIG. 4 shows a first embodiment of a record player according to the present invention, and FIGS. 5A and 5B each show the shape of a turntable sheet, which is a main part of the present invention in FIG. In FIG. 4, the turntable 2 is made of aluminum die-casting as in the prior art, and has a flat top surface, and its hap portion is fixed to the tapered portion of the rotating shaft 21 with iron. The rotating shaft 21 has its lower surface supported by a steel ball 22, and is rotatably held within a bearing body 23. The rotary shaft 21 has a hole 2 in its direction.
1a, an upper diametrical hole 21b that communicates with the upper part of the axial hole 21a and closes to the upper surface side of a turntable sheet 26, which will be described later, and a lower diametrical hole 21c that communicates with the lower part of the hole 21a and closes to the space 23a, respectively. It has been drilled. Further, a suction hole 24 is provided on the side surface of the bearing body 23, through which the space 23a and the suction pump 25 are connected. The turntable sheet 26 is made of an elastic material such as rubber or plastic and is molded as shown in FIGS. 5A and 5B, and is placed on the turntable 20.

This seat 26 has a plurality of arcuate protrusions 26b protruding from the inner side of an annular protrusion 26a on the outermost periphery. The plurality of protrusions 26b are provided on a plurality of circles, and the dividing points thereof are aligned on the same radius divided into six equal parts in the circumferential direction. Thereby, a groove space 26c extending in the cylindrical direction between the radially adjacent step portions, and a groove space 26d extending in the radial direction between the circumferentially adjacent step portions are formed. As shown in FIGS. 4 and 5B, each of the groove spaces 26c and 26d is cut off from the outside by the record 27 being dispatched, and the circumferential air passage 28 is closed in cooperation with the record 27. and a radial ventilation passage 29. Also, the diametrical hole 21b serves as a turntable sheet 26 and a cord board 2.
7 is closed as a suction closure 21d.
When the suction pump 25 is operated when playing a record, the air in the circumferential ventilation passage 28 is guided toward the center of the turntable through the radial ventilation passage 29.
It is sucked into the hole 21b through the suction closure 21d.

Further, the air is discharged to the outside by a suction pump 25 through the holes 21a, 21c and the suction hole 24, and the record 27 is sucked onto the turntable sheet 26. This results in
The record disc 27 is played without any howling or the like, and even if it is warped, the warp is corrected and there is no noise, distortion, etc. FIGS. 6A and 6B respectively show other embodiments of the turntable sheet described above and applicable to the code player.

In the turntable sheet 30' to be replaced on the turntable 20, as in the above case, a large number of arcuate protrusions 30b are arranged in the same circular shape inside the outermost annular protrusion 30a. It becomes. Further, the circumferentially divided portions of the arcuate step portion 30b are arranged at different positions for each adjacent concentric circle portion. As a result, a groove space 30c that extends in the circumferential direction between the radially adjacent step portions is formed, and a groove that extends in the radial direction in a zigzag shape shown by a large broken line is formed between the circumferentially adjacent step portions. A space 30d is formed. Groove space 30d
cooperates with the reworked record 27 to form a radial ventilation passage 31, and another groove space 30c likewise forms a circumferential ventilation passage 32. When the suction pump is activated, the air in the circumferential ventilation path 32 is guided toward the center of the turntable through the radial ventilation path 31 and is discharged to the outside.
7 is attracted onto the sheet 30 as shown in FIG. In this case, since the arcuate protrusions 30b are arranged alternately in the radial direction, the record disc 27 is held substantially uniformly over the entire surface and is attracted to the record disc 27. FIGS. 7A and 7B each show other embodiments of the turntable sheet. Turntable sheet 3
5 has an annular protrusion 35a formed on the outermost periphery, and a linear protrusion 35b extending in the radial direction in a region surrounded by the annular protrusion 35a.
A large number of them are arranged spaced apart from each other. As a result, the groove space 3
5c is formed extending in the radial direction, and this groove space 35c
is covered by the record disc 27 arranged as shown in FIG. When the suction pump is activated, the air in the groove space 35c is guided to the center of the turntable through the ventilation path 36 and discharged to the outside, and the record 27 is attracted onto the turntable sheet 35.

FIGS. 8A and 8B each show still other embodiments of the turntable sheet.

The turntable sheet 430 has an annular protrusion 40a formed on its outermost periphery, and a large number of flat cylindrical protrusions 40b spaced apart from each other in a region that is rested on the annular protrusion 40a. As a result, a mesh-like flat space 40c is formed between the adjacent flat cylindrical protrusions 40b, and this space 40c is suitable for the central part of the three turntable seats 40. This mesh-like flat space 40c is covered with the record disc 27 as shown in FIG. 2B, and becomes a ventilation path 41 extending approximately in the radial direction. When the suction pump is activated, the air in the flat space 40c is guided to the center of the turntable through the ventilation path 41 and discharged to the outside.
is absorbed onto the sheet 40. This turntable sheet 401 uniformly holds the record disc 27 in the same machine as the turntable sheet 30 shown in FIG. 6, and molds for molding can be manufactured relatively easily compared to other sheets.

Next, another embodiment of the turntable sheet will be described with reference to FIGS. 9 and 10. In this embodiment, the record is attracted to the sheet by suction operation, and the sheet itself is also turned. It is designed to be attached to a table.

In the turntable sheet 45 shown in FIGS. 9A and 9B, an annular protrusion 45a is formed at the outermost periphery thereof,
There are also a plurality of annular protrusions 45b within the area surrounded by this.
are arranged concentrically, and an annular groove 45c is formed between adjacent annular protrusions 45b.

Further, on the lower surface side of the sheet 45, a plurality of narrow grooves 45d extending in the radial direction are radially formed. These pongee width grooves 45d do not reach the outer circumferential end on the outer circumferential side, do not enter into the outer circumferential side surface, and extend to the vicinity of the outer circumference,
The inner peripheral side portion opens into an annular groove 45e at the center. Further, a through hole 45f is formed in the annular groove 45c at a position corresponding to the pongee width groove 45d on the lower surface side. When the turntable sheet 45 is mounted on the flat turntable 20, the narrow groove 45d becomes a radial ventilation passage 46, and the annular groove 45c becomes a central space 47.

Further, when the record disc 27 is placed on the sheet 45, the annular groove 45c becomes an annular space 48. In addition, the suction opening 21d of the diametrical hole 21b of the turntable rotation shaft 21 is
is located at a height corresponding to the central space 47. child)
When the suction pump is activated, a plurality of annular spaces 48
The air inside is guided through the through hole 45f to a ventilation path 46 on the lower surface side of the seat, and is further collected into a central space 47 at the center of the turntable through this ventilation path 46, and is then collected in a central space 47 at the center of the turntable.
d into the hole 21b in the rotating shaft 21 and discharged to the outside by the pump.

By suctioning the air in the annular space 48, the record 27
is attracted onto the sheet 45, and at the same time, the sheet 45 is attracted onto the turntable 20 by suction of the air in the ventilation passage 46, thereby more strongly damping the vibration of the record. In this sheet 45, the protruding portion 45b
Since it is formed in a continuous annular shape, even if the regenerated needle is accidentally placed on the sheet 45, there is less dust that could damage the regenerated needle.

The top surface of the turntable sheet 5 shown in FIGS. 10A and 10B is flat and has a large number of through holes 50a formed therein. On the lower surface side, an annular protruding part 50b is formed at the outermost periphery thereof, and a plurality of arcuate protruding parts 50c are arranged in the same circular shape within the area that is loosened by the annular protruding part 50b, A pattern similar to that of the turntable sheet 26 shown in FIG. 5 is formed. Note that a groove 50d extending in the radial direction is formed by the circumferentially dividing portion of the arcuate protruding portion 50c. Further, the plurality of through holes 50a are bored corresponding to the arcuate grooves 50e between the radially adjacent arcuate protrusions 50c and the grooves 50d. When the turntable sheet 50 is placed on the turntable 20, the groove 50d becomes a radial ventilation passage 51, and the groove 50d becomes a radial ventilation passage 51.
e is an arcuate ventilation path 52.

When the suction pump is activated with the record 27 placed on the sheet 50, the air on the upper surface of the sheet 50 is sucked into the arcuate air passage 52 on the lower surface of the sheet through the numerous through holes 50a. Further, the air is collected in the center through the radial ventilation passage 51, is sucked into the holes 21b and 21a in the rotating shaft 21 through the suction opening 21d, and is discharged to the outside by a pump.

In this case, the record 27 is attracted to the upper surface of the sheet 50 by suction of the air on the upper surface side of the sheet, and the air passages 52 and 51
The sheet 50 is moved to the turntable 20 by suction of the air inside.
is absorbed on top. In particular, since the contact area between the record 27 and the sheet 50 is large, howling is effectively prevented. The sheet 50 can also be used with the upper and lower surfaces reversed, and in this case as well, the suction operation is performed on the upper and lower surfaces of the sheet. In addition, in the turntable sheets 45 and 50, the record sticks to the upper surface of the sheet and the sheet itself sticks to the turntable, so that the record, the sheet, and the turntable stick to each other and become a single unit. In addition to exhibiting excellent vibration-proofing effects, there is no slippage on the rear surface, allowing the record to rotate stably.

Next, another embodiment of the record player according to the present invention will be described. In this embodiment, the outer circumferential end of the radial air passage is appropriately changed according to the diameter of the record to be sent. The record disc is also configured to be able to be adsorbed in the same way as a large diameter record disc.

In the cutting device shown in FIGS. 1 to 3, by appropriately changing the rotation setting position of the central member 7, the grooves that fit the suction hole 9 can be changed to grooves 3, 3, 4, and 3.
, 4, 5, and further grooves 3, 4, 5, and 6, and the grooves that perform the suction function are set according to the size of the lacquer disc, so that lacquer discs of various sizes can be suctioned without any problem. It has a configuration that allows for. However, this configuration is complicated and cannot be applied to record players. The (split type) turntable seat 55 shown in FIGS. 11A and 11B includes a disc-shaped turntable seat part 56 with a diameter of D, and an annular turntable seat part 57 with an inner diameter of D and an outer diameter of D2. A large number of arcuate protrusions 58 and 59 are arranged in the same circle on the upper surface of each.

Note that the above-mentioned folding point D is defined at the inner surface position of the circular arc-shaped protrusion portion 59 on the innermost circumferential side. Further, the arcuate protruding portion 58,
59 forms the same pattern as in the sheet 26 shown in FIG. 5, with radial air passages 60 and 61 extending through the vents to the location of the outermost annular step 62. When you send Daiyo's record 63 to Hagi and activate the suction pump,
The air above each sheet portion 57, 56 is collected in the center through ventilation passages 61, 60 and exhausted to the outside,
3 are attracted onto the sheet parts 57 and 56, as shown in FIG.

In addition, when adsorbing a small-diameter record 64, the first
As shown in FIGS. 2A and 2B, the annular turntable seat portion 57 on the outer peripheral side is inverted. ), each sheet part 5
6, 57, the thickness t of the flat plate portion is larger than the protruding height h of the protruding portions 58, 59, so by reversing the sheet 57, the radial air passage 60 is formed on the inner peripheral end surface of the sheet portion 57. It is restricted at every position (position of diameter D), and is shorter than in the above case. When the above-mentioned suction operation is carried out with the chord board 64 in a closed position, the air on the seat 57 is not suctioned, and the air on the seat part 56 is collected in the center through the radial air passage 60 and discharged to the outside. Then, the small-diameter record disc 64 is attracted onto the sheet portion 56.

13 and 14 show another embodiment of the turntable sheet. The turntable seat 65 shown in FIGS. 13A and 13B is made by iron-coupling a disc-shaped turntable seat part 66 with a diameter D and an annular turntable seat part 67 with an inner diameter D and an outer diameter D2. are combined and reproduced on the turntable 20. A large number of arcuate protrusions 68 are provided on the upper surfaces of the turntable seat parts 66 and 67, respectively.
and 69 are formed in substantially the same pattern as in the case of the evening table sheet 55. Further, the respective seat portions 66 and 67 are positioned so that their respective radial ventilation passages 70 and 71 are aligned. Further, the -pair of seat portions 66 and 67 are combined with an arcuate stepped portion 68 and an arcuate stepped portion 69 facing each other. Furthermore, the ventilation passage 71 extends to the position of the annular protrusion 72 on the outermost periphery. When the large-diameter record 63 is drummed to activate the suction pump, the air on each seat section 67, 66 is collected in the center through the ventilation passages 71, 70 and exhausted to the outside, and the record 63 is As shown in FIG. B, it is attracted onto the sheet parts 67 and 66. When adsorbing a small-diameter record 64, as shown in FIGS. 14A and 14B, the annular seat portion 6
7 is rotated by a predetermined angle independently of the disk-shaped seat portion 66. As the seat portion 67 rotates, the ventilation passages 70 and 71 are displaced, and the ventilation passage 70 is blocked from extending in the outer circumferential direction by the innermost portion of the arcuate stepped portion 69 of the seat portion 67. When the cord board 64 is spread and the suction operation is performed as described above, the air only on the sheet part 66 is collected in the center part through the ventilation path 70 and discharged to the outside, without unnecessary suction.
The record disc 64 is sucked onto the sheet portion 66.

The operation of shifting the position of the annular turntable seat portion 67 in the circumferential direction is easier than the reversing operation described above, and improves operability.

FIGS. 15 to 17 show still another embodiment of the turntable sheet.

The turntable sheet 75 shown in FIGS. 15A and 15B is
A disc-shaped turntable sheet part 76 with a diameter of D, and an annular turntable sheet 77 with an inner diameter of D and an outer diameter of D2 are iron-bonded and mounted on the turntable 20. . The turntable sheet 76 has a plurality of annular protrusions 78 concentrically protruding from its upper surface, with the outermost periphery being the protrusion, and a ventilation passage 79 extending in the radial direction is formed on its lower surface. A through hole 80 is bored at the bottom of each groove at a position corresponding to the ventilation passage 79. In addition, the turntable seat part 77 has a plurality of annular protrusions 82 on its upper surface side, which protrude in the same circular manner with the outermost and innermost circumferential sides as protrusions, and the lower surface thereof in a radial direction. ventilation passage 8 extending to
3, and a through hole 84 is bored at the bottom of each groove at a position corresponding to the ventilation path 83. In addition, the ventilation path 7
9 and 83 match, and the outer circumferential side of the annular protruding portion 78 and the inner circumferential side of the annular protruding portion are in contact with each other. When the suction pump is activated with a large-diameter record 63 in use, the air in the grooves of the respective seat parts 77 and 76 is pumped into the through holes 84 and 8.
0 and further through the ventilation holes 83 and 79 to be collected in the center and discharged to the outside, and the record disc 63 is sucked onto the sheet parts 76 and 77 as shown in FIG.

At this time, each seat portion 76, 77 is connected to the turntable 20.
is absorbed on top. When a small-diameter record/recording board 64 is to be attracted to the singing evening table sheet 75, the annular sheet portion 77 is shifted in the circumferential direction as shown in FIG. 16, or as shown in FIG. Invert the sheet portion 77 as shown in FIG.

First, as a first method, when the annular seat part 77 is shifted in the circumferential direction, as shown in FIGS. be locked down.

If the suction operation is performed in this state, the air on the upper surface side of the sheet portion 77 will not be suctioned, and the air on the upper surface side of the sheet portion 76 will be discharged to the outside through the through hole 80 and the ventilation path 79, and the record disc will be 64 is a seat portion 76 as shown in FIG.
is absorbed on top. As a second method, when the annular seat portion 77 is reversed, the outer peripheral side of the air passage 79 is closed on the side of the innermost peripheral protrusion 82 of the seat portion 77, as shown in FIGS. 17A and 17B. Closed by a wall.

If a suction operation is performed in this state, only the air on the upper surface side of the seat section 76 will be suctioned and discharged in the same way as in the above case.
The record disc 64 is sucked onto the sheet portion 76 as shown in FIG. In the above embodiment, when the record discs 63 and 64 are sucked, the turntable sheet section 7
6 and 77 are attracted onto the turntable 20.

Next, another embodiment of the turntaple sheet will be described.

The turntable sheet 85 shown in FIGS. 18A and 18B is
A disc-shaped turntable sheet portion 86 with a diameter D, and an annular turntable sheet portion 87 with an inner ridge D and an outer ridge D2 are made of competing silk and placed on the turntable 20. . The turntable sheets 86 and 87 each have a large number of arcuate protrusions 88 and 89 arranged in the same circle on the lower surface side, and a large number of through holes 90 and 91 formed in correspondence with the lower side grooves. As a whole, a protrusion pattern substantially similar to that of the turntable sheet 50 shown in FIG. 10 is formed. Further, the ventilation passages 92 and 93 extending in the radial direction are aligned on the same radius. When a large-diameter record 63 is used for suction operation, the air on the upper surface of each sheet portion 87, 86 passes through the through holes 91, 90, and then passes through the ventilation passages 93, 92 to the center of the turntable. and discharged to the outside.

As a result, the record disc 63 is attracted onto each of the sheet parts 87 and 86. When adsorbing a small-diameter record 64, as shown in FIGS. 19A and 19B, the annular seat portion 8
7 is inverted and connected to the seat portion 86 again. As a result, the outer circumferential side of the air passage 92 of the seat portion 86 is closed by the inner circumferential side surface of the seat portion 87 . Above code board 6
4 to perform the suction operation, the air on the upper surface side of the sheet portion 87 is not suctioned, and the air on the upper surface side of the sheet portion 86 is discharged to the outside through the through hole 90 and the ventilation path 92, and the record is removed. The board 64 is attracted onto the sheet part 86 with substantially the entire surface of the board in contact with the board 64. In this case, the record 64
Since the contact area between the seat portion 86 and the seat portion 86 is large, howling is particularly effectively prevented. Furthermore, the seat portion 86
is also attracted onto the turntable 20, exhibiting an excellent vibration-proofing effect. In addition, in the above-mentioned split type turntable seat, there is one annular turntable seat part, but it is not limited to this, and it is also possible to have a configuration in which a plurality of turntable seat parts are arranged in the same circle. record discs can be adsorbed as appropriate.

Although the above turntable sheet can be manufactured with high precision by machining a metal disc using a lathe, etc., if a hard foreign object gets between the sheet and the chord disc, it may damage the record disc. , undesirable.

For this reason, the turntable sheet is manufactured by molding a material such as rubber or synthetic resin, and it is more practical if it has some elasticity. As described above, according to the record player of the present invention, in a record player that sucks the air above the turntable through the suction port to attract the record onto the turntable, the record player is mounted on the turntable. An annular protrusion is formed on the outer periphery of the turntable sheet, and a plurality of protrusions having the same height as the annular protrusion extend in the radial direction within an area that is relieved by the annular protrusion. The turntable itself has a structure in which ventilation passages are formed radially between the plurality of protrusions, and the passages are passed through the suction gate, so that the ventilation passages are formed in the turntable itself. However, the turntable itself can have a structure without ventilation passages, and it is relatively easy to make the turntable sheet the above structure, so it is possible to have a ring-shaped structure on the turntable itself. Compared to a configuration in which a protrusion and a ventilation passage are provided, the record player can be made considerably cheaper, and furthermore, the central disc-shaped seat portion formed by each turntable sheet forming a ventilation passage can be made considerably cheaper. and at least one annular sheet part that fits around the periphery, and by moving or inverting the annular sheet part in the circumferential direction, a ventilation passage extending radially from the center can be created at an appropriate point along the way. The structure is such that the area that is blocked and the suction operation is performed in the sheet is determined according to the size of the record, so it has excellent features such as being able to perform the normal suction operation of records of various sizes with simple operation. have

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 are a plan view and a sectional view showing the turntable mechanism of a record cutting device, respectively, and FIG. 3 is a diagram showing the mechanism shown in FIG. 1 and the mechanism that cooperates with it. FIG. 4 is a cross-sectional view showing the configuration of the essential parts of one embodiment of the record player according to the present invention, and FIGS. 5A and B are respectively on the turntable of the record player shown in FIG. A plan view and a sectional view of the laminated turntable sheet, FIGS. 6A and B, FIGS. 7A and B, FIGS. 8A and B, FIGS. 9A and B, and FIG. 10A. B is a plan view and a sectional view showing each example of a turntable sheet applicable to the record player shown in FIG. 4, and FIGS. 11A and B are split type turntable sheets applicable to the record player shown in FIG. A plan view and a cross-sectional view showing a part of the table sheet; FIGS. 12A and B are a plan view and a cross-sectional view showing the inverted state of the annular seat portion in FIG. 11; FIGS. 13A and B are split type turn 14 A and B are a plan view and a sectional view showing a part of another example of the table sheet, respectively. Figure A and a plan view and a cross-sectional view showing a part of another example of a turntable sheet with each side split, 1st
6A, B and 17A, B are respectively a plan view and a sectional view of the annular seat portion in FIG. 19A and 19B are plan views and cross-sectional views showing a portion of yet another example of the split turntable seat, respectively, and FIGS. 19A and 19B are plane views of FIG. 18 with the annular seat portion of the seat shifted in the circumferential direction. They are a figure and a sectional view.

20... Turntable, 21... Rotating shaft, 21a... Axial hole, 21b, 21c...
...Diameter hole, 21d...Suction closing, 23...
...・Bearing body, 25 ... Suction pump, 26, 30, 35,
40, 45, 50... Turntable sheet, 26a,
30a, 35a, 40a, 45a, 45b, 50b, 7
8, 82... Annular protrusion, 26b, 30b,
50c, 58, 59, 68, 69, 88, 89...
Arc-shaped protrusion, 26c, 26d, 30c, 30d, 35
c...Groove space, 27...Record, 29, 31, 36
,41,46,51,60,61,70,71,79,
83, 91, 93... Radial ventilation passage, 35b...
... linear protrusion, 40b... flat cylindrical protrusion,
40c...mesh space, 45c...circular groove,
45d...Narrow groove, 45e...Central annular groove, 45f, 50a, 80, 84, 90, 91...Through hole, 47...Central space, 55, 65 ,75,8
5...Divided turntable sheet, 56, 66, 76
, 86...disc-shaped turntable sheet portion, 57,
67, 77, 87... Annular turntable seat section, 63... Oyo record disc, 64... Small diameter record disc.

Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 ‘A.I. [81 Figure 6 ‘A.I. [B' Figure 7 [A1 [B’ Figure 8 rAI ‘B’ Figure 9 [A’ [BI 27 Figure 10 fA' 'BI Figure 11 ‘A’ -S7 'BI Figure 12 [A1 [B- Figure 13 ‘A.I. [81 Figure 14 Kuken 1 ′,. [B’ 68. Figure 15 ‘A’ 'B1 8o Figure 16 ‘A.I. ‘B’8 Figure 17 {AI 'BI 77 78 Figure 18 89 [Al 85 /1 86- Old Figure 19 [AI ‘B’

Claims (1)

[Claims] 1. In a record player that sucks air above a turntable through a suction opening to suck a record onto the turntable, an annular shape is provided on the outer periphery of a turntable sheet placed on the turntable. forming a protrusion, and forming a plurality of protrusions extending in the radial direction and having the same height as the annular protrusion in a region surrounded by the annular protrusion; A record player characterized in that air passages are formed in a radial manner and communicate with a suction opening. 2. In a record player that suctions the air above the turntable through a suction opening to attract the record onto the turntable, the turntable sheet placed on the turntable is connected to the disc-shaped turntable sheet part and the circular and at least one annular turntable sheet part that fits around the plate-like turntable sheet part, and each turntable sheet part has an air passageway that connects the recesses provided on the upper surface of the turntable sheet part with each other. By independently moving or inverting the annular turntable sheet portion in the circumferential direction, the radial length of the air passage communicating with the suction opening is changed, and the air above the nuclear turntable sheet is sucked. What is claimed is: 1. A record player characterized in that the record player is configured to be able to switch between areas. 3. The disc-shaped turntable seat part has an arc-shaped protrusion on the outermost circumferential side, and the annular turntable seat part has an arc-shaped protrusion on the innermost circumference side, and the circular The annular turntable seat section is moved in the circumferential direction so that the outer circumferential end of the air passage of the disc-shaped turntable seat section is closed off by the inner circumferential side wall surface of the annular turntable seat section. A record player according to claim 2, characterized in that: