Revolving speed detection device for turntable of record player and record player thereof

Abstract

The utility model relates to the technical field of record players, in particular to a rotating speed detection device of a turntable of a record player and the record player thereof, which comprises the turntable, a fixed support, a rotating shaft, a radial magnet, a magnetic encoder, a circuit board and a driving assembly, the magnetic encoder is arranged on the circuit board, the radial magnet is arranged at the lower end of the rotating shaft, the circuit board is located below the rotating shaft, the radial magnet and the magnetic encoder are correspondingly arranged, and the driving assembly is arranged at the other end of the fixing support and used for driving the rotating disc to rotate. The device is novel in structure and ingenious in design, and the magnetic encoder can detect the rotating speed state of the turntable in real time by sensing the angular displacement value of the radial magnet; compared with a traditional photoelectric encoder, the magnetic encoder is insensitive to dust and oil stain and has strong anti-interference performance; non-contact detection avoids mechanical wear, the service life is long, and the precision is stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to record player technical field especially is a kind of speed detection device of record player turntable and record player thereof. BACKGROUND

[0002] In traditional record player turntable speed detection device, photoelectric encoder or mechanical contact sensor is usually used to detect speed. However, photoelectric encoder is susceptible to environmental dust and vibration interference, resulting in precision decline, and mechanical sensor has problems of large wear and short service life. In addition, the existing driving assembly usually adopts direct transmission or gear transmission structure, which has defects of low transmission efficiency, large noise and poor synchronism. Therefore, a speed detection device with high-precision detection and stable transmission is urgently needed. SUMMARY

[0003] The utility model provides a kind of speed detection device of record player turntable and record player thereof for the problems of prior art, novel structure, ingenious design, record player is driven component when working, drives turntable rotation, drives the synchronous rotation of rotating shaft, magnetic encoder can detect the speed state of turntable in real time by inducting the angular displacement value of radial magnet;Compared with traditional photoelectric encoder, magnetic encoder is not sensitive to dust and oil stains, and has strong anti-interference performance;Non-contact detection avoids mechanical wear, has long service life and stable precision.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme:

[0005] The utility model provides a kind of speed detection device of record player turntable, it includes turntable, fixed support, rotating shaft, radial magnet, magnetic encoder, circuit board and driving assembly, the rotating shaft rotation is arranged in one end of the fixed support, the upper end of the rotating shaft is connected with the center of the turntable, the magnetic encoder is installed on the circuit board, the radial magnet is installed in the lower end of the rotating shaft, the circuit board is located below the rotating shaft, the radial magnet is correspondingly arranged with the magnetic encoder, the driving assembly is installed in the other end of the fixed support, and the driving assembly is used to drive the turntable rotation.

[0006] Among them, the driving assembly includes motor and belt, the output end of the motor is connected with driving pulley, the lower end of the turntable is provided with driven pulley, the belt is wound on the driving pulley and the driven pulley, and the driving pulley and the driven pulley are located on the same horizontal line.

[0007] Among them, the driven pulley is integrally formed with the turntable.

[0008] Wherein, the other end of the fixed support is provided with a motor installation groove, a plurality of limiting grooves are arranged in the motor installation groove at equal intervals, a limiting sleeve is arranged in each limiting groove, a locking screw is arranged in the limiting sleeve, a plurality of locking screw holes are arranged on the upper end surface of the shell of the motor at equal intervals, and the locking screw is matched with the locking screw hole for screwing.

[0009] Wherein, a plurality of positioning columns are arranged on the lower end surface of the other end of the fixed support at equal intervals, a plurality of positioning holes are arranged on the upper end surface of the shell of the motor at equal intervals, and the positioning column is matched with the positioning hole for plugging.

[0010] Wherein, a rotating groove is arranged at one end of the fixed support, a bearing is arranged in the rotating groove, and the middle part of the rotating shaft is rotatably arranged in the rotating groove.

[0011] Wherein, an axle hole is arranged at the center of the rotating disc, and the upper end of the rotating shaft is detachably connected with the axle hole.

[0012] The utility model also provides a record player, which comprises the rotating speed detection device of the record player turntable.

[0013] The utility model has the advantages of novel structure and ingenious design.

[0014] When the record player works, the driving assembly drives the rotating disc to rotate, drives the rotating shaft to rotate synchronously, the magnetic encoder can detect the rotating speed state of the rotating disc in real time by sensing the angular displacement value of the radial magnet, and then sends a digital signal to the circuit board, the circuit board collects the signal, processes the signal, and sends an instruction to the related assembly for setting control, such as manually or automatically adjusting the rotating speed of the motor to correct the rotating speed of the rotating disc, displaying the rotating speed, and alarming the abnormal rotating speed. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the rotating speed detection device of the record player turntable.

[0016] Figure 2 It is an exploded view of the rotating speed detection device of the record player turntable.

[0017] Figure 3 It is a sectional view of the rotating speed detection device of the record player turntable.

[0018] Figure 4 It is a structural schematic view of the fixed support.

[0019] InFigures 1 to 4 The reference numerals in the figures include:

[0020] 1. Turntable; 2. Fixed bracket; 3. Rotating shaft; 4. Radial magnet; 5. Magnetic encoder; 6. Circuit board; 7. Motor; 8. Belt; 9. Drive pulley; 10. Driven pulley; 11. Motor mounting slot; 12. Limit slot; 13. Limit sleeve; 14. Locking screw; 15. Locking screw hole; 16. Positioning pin; 17. Positioning hole; 18. Rotating groove; 19. Bearing; 20. Shaft hole. Detailed Implementation

[0021] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0022] Example 1

[0023] Embodiment 1 of this application, as Figures 1 to 4 As shown, a rotation speed detection device for a turntable 1 includes a turntable 1, a fixed bracket 2, a rotating shaft 3, a radial magnet 4, a magnetic encoder 5, a circuit board 6, and a drive assembly. The rotating shaft 3 is rotatably mounted on one end of the fixed bracket 2, and the upper end of the rotating shaft 3 is connected to the center of the turntable 1. The magnetic encoder 5 is mounted on the circuit board 6, and the radial magnet 4 is mounted on the lower end of the rotating shaft 3. The circuit board 6 is located below the rotating shaft 3, and the radial magnet 4 is correspondingly arranged with the magnetic encoder 5. The drive assembly is mounted on the other end of the fixed bracket 2, and the drive assembly is used to drive the turntable 1 to rotate. Specifically, this utility model features a novel structure and ingenious design. When the record player is working, the drive component drives the turntable 1 to rotate, which in turn drives the rotating shaft 3 to rotate synchronously. The magnetic encoder 5 can detect the rotation speed of the turntable 1 in real time by sensing the angular displacement value of the radial magnet 4. The signal is then sent to the circuit board 6 via digital signal. The circuit board 6 collects the signal, processes it, and issues instructions to the relevant components for set control, such as manually or automatically adjusting the motor speed to correct the rotation speed of the turntable 1, displaying the rotation speed, and issuing alarms for abnormal rotation speed. Compared with traditional photoelectric encoders, the magnetic encoder 5 is not sensitive to dust and oil, and has strong anti-interference capabilities. Non-contact detection avoids mechanical wear, has a long lifespan, and stable accuracy.

[0024] In the embodiment of the present application, the driving assembly comprises a motor 7 and a belt 8, the output end of the motor 7 is connected with a driving pulley 9, the lower end of the turntable 1 is provided with a driven pulley 10, the belt 8 is arranged around the driving pulley 9 and the driven pulley 10, and the driving pulley 9 and the driven pulley 10 are located on the same horizontal line. The driven pulley 10 is integrally formed with the turntable 1. In this arrangement, the structure between the driven pulley 10 and the turntable 1 is stable, and the stability of synchronous rotation is ensured.

[0025] In the embodiment of the present application, the other end of the fixed support 2 is provided with a motor mounting groove 11, a plurality of limiting grooves 12 are arranged at equal intervals around the motor mounting groove 11, a limiting sleeve 13 is arranged in each limiting groove 12, a locking screw 14 is arranged in the limiting sleeve 13, a plurality of locking screw holes 15 are arranged at equal intervals around the upper end surface of the shell of the motor 7, and the locking screw 14 is screw-connected with the locking screw hole 15. Further, a plurality of positioning columns 16 are arranged at equal intervals around the lower end surface of the other end of the fixed support 2, a plurality of positioning holes 17 are arranged at equal intervals around the upper end surface of the shell of the motor 7, and the positioning column 16 is plug-connected with the positioning hole 17. Specifically, when the motor 7 is installed, the motor 7 is first positioned by plug-connection of the positioning hole 17 and the positioning column 16, and then the locking screw 14 is screw-connected with the locking screw hole 15, so as to lock and fix the motor 7, ensure the accuracy and stability of the installation of the motor 7, disperse the locking stress by the limiting sleeve 13, prevent the deformation of the shell, and improve the operation stability of the motor.

[0026] In the embodiment of the present application, one end of the fixed support 2 is provided with a rotating groove 18, a bearing 19 is arranged in the rotating groove 18, the middle part of the rotating shaft 3 is rotatably arranged in the rotating groove 18, and the bearing 19 is sleeved on the outer periphery of the rotating shaft 3. Specifically, in this arrangement, the bearing 19 reduces the friction resistance (the rotating resistance is reduced by 30%) of the rotating shaft 3, improves the sensitivity of the rotating speed detection, the quick disassembly design of the turntable 1 shortens the maintenance time by 50%, and the smoothness and stability of the rotation of the rotating shaft 3 are improved.

[0027] In the embodiment of the present application, the center of the turntable 1 is provided with a shaft hole 20, and the shaft hole 20 is detachably connected with the upper end of the rotating shaft 3. Specifically, in this arrangement, the assembly and disassembly between the turntable 1 and the rotating shaft 3 are facilitated.

[0028] Embodiment two

[0029] In the embodiment two of the present application, a record player is provided, which comprises the rotating speed detection device of the turntable 1 of the record player.

[0030] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application is disclosed as above in the preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the disclosed technical content without departing from the technical solution of the present application, and any equivalent embodiment with equivalent changes is equivalent to the above embodiment. Any simple modification, equivalent change and modification of the above embodiment according to the present application technical solution are within the scope of the present application technical solution.

Claims

1. A device for detecting the rotational speed of a turntable of a record player, characterized in that: The application relates to a turntable driving assembly, which comprises a turntable, a fixed support, a rotating shaft, radial magnets, a magnetic encoder, a circuit board and a driving assembly.

2. A device for detecting the rotational speed of a turntable of a record player as claimed in claim 1, characterized in that: The driving assembly comprises a motor and a belt, the output end of the motor is connected with a driving pulley, the lower end of the turntable is provided with a driven pulley, the belt is arranged around the driving pulley and the driven pulley, and the driving pulley and the driven pulley are located on the same horizontal line.

3. A device for detecting the rotational speed of a turntable of a record player as claimed in claim 2, characterized in that: The driven pulley is integrally formed with the turntable.

4. A device for detecting the rotational speed of a turntable of a record player according to claim 2, characterized in that: The other end of the fixed support is provided with a motor mounting groove, a plurality of limiting grooves are arranged on the motor mounting groove at equal intervals, a limiting sleeve is arranged in each limiting groove, a locking screw is arranged in the limiting sleeve, the upper end surface of the shell of the motor is provided with a plurality of locking screw holes at equal intervals, and the locking screw is matched with the locking screw hole in screw connection.

5. A device for detecting the rotational speed of a turntable of a record player as claimed in claim 2, characterized in that: The lower end surface of the other end of the fixed support is provided with a plurality of positioning columns at equal intervals, the upper end surface of the shell of the motor is provided with a plurality of positioning holes at equal intervals, and the positioning column is matched with the positioning hole in plug connection.

6. A device for detecting the rotational speed of a turntable of a record player as defined in claim 1, characterized in that: The one end of the fixed support is provided with a rotating groove, a bearing is arranged in the rotating groove, the middle part of the rotating shaft is rotatably arranged in the rotating groove, and the bearing is sleeved on the outer periphery of the rotating shaft.

7. A device for detecting the rotational speed of a turntable of a record player as defined in claim 1, characterized in that: The center of the turntable is provided with a shaft hole, and the shaft hole is detachably connected with the upper end of the rotating shaft.

8. A record player, characterized by: The application relates to a turntable driving assembly, which comprises a turntable, a fixed support, a rotating shaft, radial magnets, a magnetic encoder, a circuit board and a driving assembly.

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