CN111128246B - Tone arm and record player with same - Google Patents
Tone arm and record player with same Download PDFInfo
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- CN111128246B CN111128246B CN202010069546.8A CN202010069546A CN111128246B CN 111128246 B CN111128246 B CN 111128246B CN 202010069546 A CN202010069546 A CN 202010069546A CN 111128246 B CN111128246 B CN 111128246B
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- rotating shaft
- tone arm
- base
- turntable
- singing
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- 230000005484 gravity Effects 0.000 claims abstract description 8
- 230000008602 contraction Effects 0.000 claims description 5
- 238000012986 modification Methods 0.000 description 2
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- 241001422033 Thestylus Species 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 230000005236 sound signal Effects 0.000 description 1
Abstract
The invention discloses a tone arm, comprising: a base; the bracket is connected with the base through a rotating shaft and can rotate along with the rotating shaft; one end of the singing rod is connected with a singing head; the adjusting component is arranged on the support and comprises a rotating shaft, a counterweight mechanism and a dynamic balancing mechanism, wherein the counterweight mechanism is positioned on the rotating shaft and used for balancing the gravity of the turntable, the dynamic balancing mechanism is used for dynamically adjusting the needle pressure of the turntable, and the rotating shaft is connected with the singing rod. Compared with the prior art, the invention ensures that the singing rods positioned at the front end and the rear end of the bracket are balanced through the counterweight mechanism, and then the pressure is applied to the singing rods positioned at the front end of the bracket through the dynamic balance structure so as to reach the required value of the needle pressure of the record head, namely, the downward pressure angle of the singing rods is dynamically regulated through the dynamic balance mechanism, and the needle pressure of the record head is further dynamically regulated so as to prevent the needle jump of the record arm from causing incorrect tracking. A record player with the tone arm is also disclosed.
Description
Technical Field
The invention relates to the technical field of record equipment, in particular to a tone arm and a record player with the tone arm.
Background
The record player is a sound playing device which is mature and classical, and the playing principle is as follows: the record is placed on the turntable of the record player to rotate, and the stylus of the tone arm is contacted with the arc notch of the record, so that the corresponding sound signal is read and amplified for playback.
Most of the gramophone among the prior art adopts the horizontal form of putting promptly, and the tone arm is parallel with the desktop, applys the acupressure through the counter weight that is located the tone arm end for the needle that is located its front end, however horizontal gramophone occupation space is great, is unfavorable for the effective utilization in space, in order to solve this technical problem, people set up the gramophone as vertical, carousel and tone arm install perpendicularly on the gramophone base promptly, however because gravity is parallel with the carousel surface, the tone arm can't applys the acupressure for the needle to can lead to tone arm needle, can't correct tracking.
Disclosure of Invention
The invention aims to solve the technical problem of providing a tone arm aiming at the defects in the prior art.
Another object of the present invention is to provide a gramophone that overcomes the above-mentioned drawbacks of the prior art.
To solve the above technical problem, according to an aspect of the present invention, there is provided a tone arm including:
A base;
The bracket is connected with the base through a rotating shaft and can rotate along with the rotating shaft;
One end of the singing rod is connected with a singing head;
the adjusting component is arranged on the support and comprises a rotating shaft, a counterweight mechanism and a dynamic balancing mechanism, wherein the counterweight mechanism is positioned on the rotating shaft and used for balancing the gravity of the turntable, the dynamic balancing mechanism is used for dynamically adjusting the needle pressure of the turntable, and the rotating shaft is connected with the singing rod.
The further technical scheme is as follows: the dynamic balance mechanism comprises an elastic piece and a pressure regulating piece, wherein the pressure regulating piece is arranged on the support, a first fixed block is arranged in the rotating shaft, the elastic piece is positioned in the rotating shaft, one side of the elastic piece is connected to the first fixed block, and the other side of the elastic piece penetrates through the rotating shaft to be connected to the pressure regulating piece, so that the expansion and contraction of the elastic piece are regulated through the pressure regulating piece.
The further technical scheme is as follows: the pressure regulating piece comprises a first regulating rod and a pull wire, one end of the first regulating rod is connected to the inner side wall at the top of the support, the other end of the first regulating rod penetrates through the inner side wall to be located outside the support, one end of the pull wire is wound on the first regulating rod, and the other end of the pull wire is connected with the elastic piece.
The further technical scheme is as follows: the pressure regulating part also comprises a fulcrum which is positioned in the rotating shaft and between the two ends of the stay wire to press and hold the stay wire.
The further technical scheme is as follows: the pressure regulating piece comprises a second regulating rod and a connecting block, wherein two ends of the second regulating rod are connected to the inner side wall of the top of the support, the connecting block is sleeved on the second regulating rod and can move left and right along the second regulating rod, and the connecting block is connected with the elastic piece to regulate the expansion and contraction of the elastic piece when the connecting block moves left and right.
The further technical scheme is as follows: and two sides of the rotating shaft are connected with a rotating bearing, the side wall of the bracket corresponding to the position of the rotating bearing is provided with a fastening through hole, and one end of a fastening screw penetrates through the fastening through hole and is positioned in a bearing hole of the rotating bearing.
The further technical scheme is as follows: the tone arm also comprises a clamping device, the clamping device is positioned on the base, and the top surface of the clamping device is provided with an arc-shaped surface matched with the tone arm so as to clamp and hold the tone arm.
The further technical scheme is as follows: the base comprises a hollow base column and a base plate sleeved at the top of the base column, the support is mounted on the base plate through a screw, a transverse rotating bearing is arranged in an inner cavity of the base column, the top end of the rotating shaft is connected with the support, the bottom end of the rotating shaft is connected with the bearing in a shaft joint mode, and the rotating shaft rotates to drive the support to rotate.
In order to solve the above technical problems, according to another aspect of the present invention, there is provided a record player, which includes a base, a mounting plate, a turntable and a tone arm, wherein the mounting plate is vertically disposed on the base, the turntable is disposed on the mounting plate, a record fixing member for pressing a record against the turntable is disposed in the middle of the turntable, the tone arm is disposed on the base to contact with a surface of a record to realize a playing function, and the tone arm is the tone arm.
The further technical scheme is as follows: the over distance of the gramophone is calculated according to the formula d= 3768.665/L, and the compensation angle is calculated according to the formula β= 5229.6/L, wherein L is the effective arm length of the gramophone's tone arm.
Compared with the prior art, the invention ensures that the singing rods positioned at the front end and the rear end of the bracket are balanced through the counterweight mechanism, and then the pressure is applied to the singing rods positioned at the front end of the bracket through the dynamic balance structure so as to reach the required value of the needle pressure of the record head, namely, the downward pressure angle of the singing rods is dynamically regulated through the dynamic balance mechanism, and the needle pressure of the record head is further dynamically regulated so as to prevent the needle jump of the record arm from causing incorrect tracking.
Drawings
Fig. 1 is a perspective view of a first embodiment of the tone arm of the present invention.
Fig. 2 is a schematic view of the tone arm of fig. 1 with the rotational shaft and weight removed.
Fig. 3 is a schematic view of the structure of the first embodiment of the tone arm of the present invention.
Fig. 4 is an exploded view of a part of the structure of the tone arm of the first embodiment of the present invention.
Fig. 5 is a perspective view of a second embodiment of the tone arm of the present invention.
Fig. 6 is a schematic view of the structure of a second embodiment of the tone arm of the present invention.
Fig. 7 is a schematic structural view of an embodiment of the turntable of the present invention.
Detailed Description
The present invention will be further described with reference to the drawings and examples below in order to more clearly understand the objects, technical solutions and advantages of the present invention to those skilled in the art.
Referring to fig. 1 to 4, fig. 1 to 4 show a first embodiment of the tone arm 1 of the present invention. In the embodiment shown in the drawings, the tone arm 1 includes a base 10, a support 20, a tone arm 30, and an adjusting assembly, where the support 20 is connected to the base 10 through a rotation shaft 50 and can rotate along with the rotation shaft 50, one end of the tone arm 30 is connected to a turntable 60, and the adjusting assembly is disposed on the support 20, and includes a rotation shaft 401, a weight mechanism 402 located on the rotation shaft 401 and used for balancing gravity of the turntable 60, and a dynamic balancing mechanism used for dynamically adjusting needle pressure of the turntable 60, and the rotation shaft 401 is connected to the tone arm 30. As can be appreciated, the connection between the bracket 20 and the adjusting assembly is the axial position of the tone arm 1, in the present invention, in order to ensure that the front and rear tone arm segments of the tone arm 1 are balanced, the front and rear tone arm moments remain balanced, whereas the tone arm front moment tf=wf=wf×elf×sin (R), the tone arm rear moment tr=wr=wr=elr×sin (R), where Wf is the tone arm front mass, lf is the tone arm front distance vector, if is the tone arm front mass (i.e. the end tone arm 1 center of gravity to the tone arm 1 center of gravity distance), wr is the tone arm rear distance vector, lr is the tone arm rear distance vector, and R is the tone arm offset angle, wf=elr=elr, whereby the tone arm weight is calculated by setting the weight value of the tone arm weight of the tone arm 1 and the tone arm weight of the tone arm 60 at the position of the tone arm 60. Based on the above design, the balance weight mechanism 402 is used to balance the singing rods 30 at the front and rear ends of the support 20, and the dynamic balance mechanism is used to apply pressure to the singing rods 30 at the front end of the support 20, so as to achieve the required value of the needle pressure of the turntable 60, namely, the dynamic balance mechanism is used to dynamically adjust the pressing angle of the singing rods 30, and further dynamically adjust the needle pressure of the turntable 60, so as to prevent the needle skipping of the tone arm 1 and incorrect tracking.
With continued reference to fig. 1 to 3, in some embodiments, the dynamic balancing mechanism includes an elastic member 4031 and a pressure regulating member 4033, the pressure regulating member 4033 is disposed on the support 20, a first fixing block 4034 is disposed in the rotating shaft 401, in this embodiment, the first fixing block 4034 is located at the end of the rotating shaft 401, the elastic member 4031 is located in the rotating shaft 401, and one side of the elastic member is connected to the first fixing block 4034, and the other side of the elastic member is connected to the pressure regulating member 4033 by penetrating through the rotating shaft 401, so as to regulate the expansion and contraction of the elastic member 4031 through the pressure regulating member 4033.
Specifically, in the present embodiment, the pressure adjusting member 4033 includes a first adjusting rod 331a, a pull wire 332 and a support shaft 333, one end of the first adjusting rod 331a is connected to the inner side wall at the top of the bracket 20, the other end of the first adjusting rod passes through the inner side wall and is located outside the bracket 20, one end of the pull wire 332 is wound on the first adjusting rod 331a, the other end of the pull wire is connected to the elastic member 4031, and the support shaft 333 is located in the rotating shaft 401 and is located between two ends of the pull wire 332 to hold the pull wire 332.
It can be seen that, in this embodiment, rotating the first adjusting lever 331a counterclockwise tightens the pull cord 332, so that the spring lengthens to increase the tension, the acting force of the pull cord 332 pulls the rear end of the record stem 30 upward, and the front end of the record stem 30 is pressed down by leverage to apply pressure to the turntable platter 60 to achieve the required value of the needle pressure of the turntable platter 60, thereby achieving the contact between the turntable platter 60 and the record surface.
In the embodiment shown in the drawings, the base 10 includes a hollow base column 101 and a base plate 102 sleeved on the top of the base column 101, the support 20 is mounted on the base plate 102 by a screw, a transverse rotating bearing is disposed in an inner cavity of the base column 101, the top end of the rotating shaft 50 is connected with the support 20, the bottom end is axially connected with the bearing, and the rotating shaft 50 rotates to drive the support 20 to rotate, so that the singing arm 1 and the singing rod 30 are rotated.
With continued reference to fig. 1 and 4, it is preferable that a rotating shaft 70 is connected to both sides of the rotating shaft 401, a fastening through hole 203 is provided on the side wall of the bracket 20 corresponding to the position of the rotating shaft 70, and one end of a fastening screw 80 is inserted through one fastening through hole 203 and is located in a bearing hole of the rotating shaft 70. Specifically, the rotating bearings 70 are sleeved at two ends of the rotating shaft 401, the rotating bearings 70 can rotate relative to the rotating shaft 401, and the rotating bearings 70 are stably installed through the fastening screws 80, so that effective subsequent adjustment is ensured.
In this embodiment, the bracket 20 includes a chassis 201 mounted on the base plate 102, and two connection plates 202 extending upward from two sides of the surface of the chassis 201, the top end of the rotation shaft 50 is connected to the chassis 201, and each connection plate 202 is provided with a fastening through hole 203 through which the fastening screw 80 passes.
In the embodiment shown in the drawings, the tone arm 1 further includes a clamping device 90, the clamping device 90 is located on the base 10, and an arc surface 901 adapted to the tone arm 30 is provided on the top surface of the clamping device 90, so as to clamp and accommodate the tone arm 30, so as to limit the front end of the tone arm 30 during use, and ensure the stability of use of the tone arm 1. Preferably, the tone arm 1 further includes a stopping control device 902 for lifting the tone arm 30 away from the surface of the record when the tone arm 1 is required to stop operation, and it is understood that the stopping control device 902 is well known to those skilled in the art, and the structure thereof will not be described herein.
Referring to fig. 5 and 6, fig. 5 and 6 show a second embodiment of the tone arm 1 of the present invention. This embodiment is different from the first embodiment in that the specific structures of the regulator 4033, the bracket 20, and the first fixing block 4034 are different, and the remaining structures are the same or similar. In this embodiment, the bracket 20 further includes a fixing plate 204 located at the top ends of the two connection plates 202 and bridging the two connection plates 202, and a rectangular slot is formed on the fixing plate 204; the first fixing block 4034 is disposed in the rotating shaft 401, and has a cylindrical shape, and one end of the elastic member 4031 is hooked on the first cylindrical fixing block 4034; the pressure adjusting member 4033 includes a second adjusting rod 331b and a connecting block 334, two ends of the second adjusting rod 331b are connected to the inner side wall of the top of the bracket 20, that is, the second adjusting rod 331b is located in the rectangular slot, two ends of the second adjusting rod 331b are connected to the inner side wall of the fixing plate 204, the connecting block 334 is sleeved on the second adjusting rod 331b and can move left and right along the second adjusting rod 331b, and the connecting block 334 is connected with the other end of the elastic member 4031 to adjust the expansion and contraction of the elastic member 4031 when the connecting block moves left and right. It will be appreciated that, in this embodiment, moving the connection block 334 to the left may cause the spring to lift, and the spring may provide a reaction force in an oblique direction, so that the rear end of the singing pole 30 (i.e., the end far away from the turntable head 60) is lifted upwards, and the front end of the singing pole 30 is pressed down by the leverage to apply pressure to the turntable head 60, so as to achieve contact between the turntable head 60 and the surface of the record, and the magnitude of the force becomes larger/smaller as the adjustment connection block 334 moves to the left/right.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a gramophone 100 according to an embodiment of the present invention. In some embodiments, the turntable 100 includes a base 2, a mounting plate, a turntable 4, and a tone arm 1, where the mounting plate is vertically disposed on the base 2, preferably, in this embodiment, a mounting surface having a certain inclination angle with respect to a horizontal plane is formed on the mounting plate, the turntable 4 is disposed on the mounting surface inclined with respect to the mounting plate so as to be obliquely disposed with respect to the base 2, a driving shaft 7 is disposed on the base 2, the driving shaft 7 drives the turntable 4 to rotate by a belt 6, and a record fixing member 5 for pressing a record against the turntable 4 is disposed in the middle of the turntable 4, and the tone arm 1 is disposed on the base 2 so as to be in contact with a surface of the record to implement a playing function, and the tone arm 1 is a tone arm according to any of the foregoing embodiments.
The turntable platter 100 of the present invention has a dynamic balance structure in the tone arm 1 to apply pressure to the tone arm 30 at the front end of the stand 20, thereby dynamically adjusting the needle pressure of the turntable platter 60, so as to solve the problem that the turntable platter 60 is in good contact with a record as in a horizontal turntable platter due to the gravity applied to the tone arm 1 in the turntable platter 100 of the present invention.
Pall (b.b.bauer) published in 1945 an article TRACKING ANGLE IN phonograph pickups, which describes the calculation of the optimal superstance D and the compensation angle beta derived therefrom, wherein,
，Where L is the effective arm length of the tone arm 1,And
The innermost circle radius and the outermost circle radius respectively corresponding to the nicking of the black recordAndIs published in different times and different countries, such as: the standards of the United states standards RIAA E4-1963 and E1& E4-1978, british standards BS1928-1965, german standards DIN45547-1981, japanese standards JIS S8502-1973, international electrotechnical IEC98-1987 and IEC 60098, among which are chosen for maximum compatibilityMinimum sum of (2)Maximum value of (i), i.e=57.5mm，The distance d= 3768.665/L, the compensation angle β= 5229.6/L, and the distance and compensation angle of the present invention are calculated according to the above equation.
In summary, the balance mechanism is used to balance the singing rods at the front and rear ends of the support, and the dynamic balance structure is used to apply pressure to the singing rods at the front end of the support, so as to achieve the required value of the needle pressure of the record head, namely, the dynamic balance mechanism is used to dynamically adjust the pressing angle of the singing rods, and further dynamically adjust the needle pressure of the record head, so that the problem that the record arm jumps the needle and cannot track correctly is avoided.
The foregoing is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Various equivalent changes and modifications can be made by those skilled in the art based on the above embodiments, and all equivalent changes or modifications made within the scope of the claims shall fall within the scope of the present invention.
Claims (5)
1. A tone arm, the tone arm comprising:
A base;
The bracket is connected with the base through a rotating shaft and can rotate along with the rotating shaft;
One end of the singing rod is connected with a singing head;
the clamping device is positioned on the base, and the top surface of the clamping device is provided with an arc-shaped surface matched with the singing rod so as to clamp and accommodate the singing rod;
The adjusting component is arranged on the bracket and comprises a rotating shaft, a weight balancing mechanism and a dynamic balancing mechanism, wherein the weight balancing mechanism is arranged on the rotating shaft and used for balancing the gravity of the turntable, the dynamic balancing mechanism is used for dynamically adjusting the needle pressure of the turntable, the rotating shaft is connected with the turntable, the dynamic balancing mechanism comprises an elastic piece and a pressure adjusting piece, the pressure adjusting piece is arranged on the bracket, a first fixed block is arranged in the rotating shaft, the elastic piece is arranged in the rotating shaft, one side of the elastic piece is connected to the first fixed block, and the other side of the elastic piece penetrates through the rotating shaft and is connected to the pressure adjusting piece so as to adjust the expansion of the elastic piece through the pressure adjusting piece;
The pressure regulating piece comprises a first regulating rod, a fulcrum and a pull wire, one end of the first regulating rod is connected to the inner side wall at the top of the support, the other end of the first regulating rod penetrates through the inner side wall and is positioned outside the support, one end of the pull wire is wound on the first regulating rod, the other end of the pull wire is connected with the elastic piece, and the fulcrum is positioned in the rotating shaft and positioned between the two ends of the pull wire to press and hold the pull wire;
Or, the pressure regulating piece comprises a second regulating rod and a connecting block, wherein two ends of the second regulating rod are connected to the inner side wall at the top of the support, the connecting block is sleeved on the second regulating rod and can move left and right along the second regulating rod, and the connecting block is connected with the elastic piece to regulate the expansion and contraction of the elastic piece when the connecting block moves left and right.
2. The tone arm of claim 1, wherein: and two sides of the rotating shaft are connected with a rotating bearing, the side wall of the bracket corresponding to the position of the rotating bearing is provided with a fastening through hole, and one end of a fastening screw penetrates through the fastening through hole and is positioned in a bearing hole of the rotating bearing.
3. The tone arm of claim 1, wherein: the base comprises a hollow base column and a base plate sleeved at the top of the base column, the support is mounted on the base plate through a screw, a transverse rotating bearing is arranged in an inner cavity of the base column, the top end of the rotating shaft is connected with the support, the bottom end of the rotating shaft is connected with the bearing in a shaft joint mode, and the rotating shaft rotates to drive the support to rotate.
4. A record player, characterized by: the gramophone comprises a base, a mounting plate, a turntable and a tone arm, wherein the mounting plate is vertically arranged on the base, the turntable is arranged on the mounting plate, a record fixing piece for propping a record against the turntable is arranged in the middle of the turntable, the tone arm is arranged on the base and is contacted with the surface of the record to realize a playing function, and the tone arm is the tone arm according to any one of claims 1-3.
5. The turntable as set forth in claim 4, wherein: the over distance of the gramophone is calculated according to the formula d= 3768.665/L, and the compensation angle is calculated according to the formula β= 5229.6/L, wherein L is the effective arm length of the gramophone's tone arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010069546.8A CN111128246B (en) | 2020-01-21 | Tone arm and record player with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010069546.8A CN111128246B (en) | 2020-01-21 | Tone arm and record player with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111128246A CN111128246A (en) | 2020-05-08 |
| CN111128246B true CN111128246B (en) | 2024-07-05 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211062464U (en) * | 2020-01-21 | 2020-07-21 | 深圳梵尼诗文化科技有限公司 | Tone arm and have record player of this tone arm |
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211062464U (en) * | 2020-01-21 | 2020-07-21 | 深圳梵尼诗文化科技有限公司 | Tone arm and have record player of this tone arm |
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