Speed regulating device of phonograph

Abstract

The utility model discloses a phonograph speed regulation device which comprises a box body, a first rotating shaft is rotatably connected to the left side of the interior of the box body, a first driven gear is fixedly connected to the upper portion of the first rotating shaft, a second driven gear is fixedly connected to the middle of the first rotating shaft, and a lifting device is fixedly connected to the right side of the interior of the box body. A rotating rod is arranged on the right side of the lifting device, a rotary knob is fixedly connected to the right end of the rotating rod, a motor is fixedly connected to the upper portion of the lifting device, a second rotating shaft is fixedly connected to the output end of the motor, and a first driving gear is fixedly connected to the upper end of the second rotating shaft; and the lower end of the second rotating shaft is fixedly connected with a second driving gear. Through the above structure, the speed of the phonograph can be adjusted, and the speed of the phonograph can be adjusted by using the knob, thereby preventing a user from touching the phonograph by mistake.

Description

Technical Field

[0001] The utility model relates to the technical field of speed regulating devices, in particular to a speed regulating device for a record player. Background Art

[0002] The speed control device of a record player is often referred to as a "turntable control system" and is used to ensure that the record rotates at the correct speed during playback to maintain the accurate pitch and rhythm of the music. This system usually consists of the following main components: Motor: The motor of the record player is responsible for driving the record turntable to rotate. Control circuit: The control circuit is responsible for receiving feedback signals from the speed sensor and adjusting the power or frequency of the motor as needed to keep the turntable at a constant rotation speed. These control circuits can include feedback control loops and PID controllers to achieve precise speed adjustment. Speed ​​adjustment button / knob: Record players are usually equipped with buttons or knobs for manually adjusting the rotation speed. Through these controls, users can fine-tune the speed of the turntable to ensure accurate playback of music. Automatic speed correction system: Some high-end record players may be equipped with an automatic speed correction system that can automatically detect and adjust the rotation speed of the turntable to ensure that it matches the standard playback speed. Through the above components, the speed control device of the record player can ensure that the record rotates at a constant and accurate speed during playback, thereby ensuring a high-quality playback experience of music.

[0003] In the prior art, some record players cannot adjust the speed, so that the record players cannot increase the speed according to the user's wishes. Some record player speed adjustment devices use push rods to adjust the speed, which may be accidentally touched during use. Utility Model Content

[0004] The utility model aims to provide a record player speed regulating device, which can regulate the speed of the record player and utilizes a knob to regulate the speed of the record player, thereby avoiding accidental touch by the user.

[0005] To achieve the above object, a speed regulating device for a record player is provided, comprising a box, a turntable is rotatably connected to the top of the box, a first rotating shaft is fixedly connected to the middle of the turntable, a rotating block is fixedly connected to the right side of the upper surface of the box, a rotor is fixedly connected to the right side of the upper surface of the box, a tonearm is rotatably connected to the top of the rotor, a cartridge is fixedly connected to the front end of the tonearm, and a stylus is fixedly connected to the lower surface of the cartridge;

[0006] The left side of the interior of the box is rotatably connected with a first rotating shaft, the top of the first rotating shaft is fixedly connected with a first driven gear, the middle of the first rotating shaft is fixedly connected with a second driven gear, the right side of the interior of the box is fixedly connected with a lifting device, a rotating rod is provided on the right side of the lifting device, the right end of the rotating rod is fixedly connected with a knob, the top of the lifting device is fixedly connected with a motor, the output end of the motor is fixedly connected with a second rotating shaft, the upper end of the second rotating shaft is fixedly connected with the first driving gear, and the lower end of the second rotating shaft is fixedly connected with the second driving gear.

[0007] According to the record player speed regulating device, an opening button is arranged on the upper surface of the box, and a closing button is arranged on the upper surface of the box.

[0008] According to the record player speed regulating device, a transparent scale is provided on the right side of the box.

[0009] According to the described record player speed regulating device, a threaded rod is rotatably connected inside the lifting device, a driven bevel gear is fixedly connected below the threaded rod, a nut seat is threadedly connected above the threaded rod, limiting rods are fixedly connected to the left and right sides of the nut seat, support columns are fixedly connected to the left and right sides of the upper surface of the nut seat, a top block is fixedly connected to the upper end of the support column, and a slide groove is provided on the right side of the lifting device.

[0010] According to the speed regulating device for a record player, the right side of the driven bevel gear is meshed with a driving bevel gear, the right side of the driving bevel gear is fixedly connected with a rotating rod, and the other end of the rotating rod is fixedly connected with a knob.

[0011] According to the speed regulating device for a record player, a pointer is fixedly connected to the right end of the right-side limit rod, and a transparent scale is slidably connected to the other end of the pointer.

[0012] According to the speed regulating device for a record player, the gear ratio between the first driving gear and the first driven gear is 1:1.

[0013] According to the speed regulating device for a record player, the gear ratio of the second driving gear to the second driven gear is 2:1.

[0014] The utility model has the following beneficial effects:

[0015] 1. Compared with the prior art, the speed regulating device of the record player, driven by the motor, makes the second shaft rotate, and the second shaft drives the first driving gear and the second driving gear to rotate simultaneously. When the first driving gear is meshed with the first driven gear, the rotation speed of the first shaft is twice the rotation speed of the second shaft. When the second driving gear is meshed with the second driven gear, the rotation speed of the first shaft is the same as the rotation speed of the second shaft.

[0016] 2. Compared with the prior art, the speed regulating device of the record player drives the rotating rod to rotate by turning the knob, and the rotating rod drives the active bevel gear to rotate, the active bevel gear is linked to the driven bevel gear to rotate, the driven bevel gear drives the threaded rod to rotate, and the threaded rod drives the nut seat to move up and down. When the nut seat moves upward, it pushes the support column to move upward, the support column pushes the top block to move upward, and the top block pushes the motor to move upward. When the top block runs to the upper vertex, the first driving gear is separated from the first driven gear, and the second driving gear is meshed with the second driven gear. When the nut seat moves downward, it drives the support column to move downward, the support column drives the top block to move downward, and the top block drives the motor to move downward. When the top block runs to the lower vertex, the first driving gear is meshed with the first driven gear, and the second driving gear is separated from the second driven gear.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0019] Figure 1 It is a three-dimensional diagram of a speed regulating device of a record player of the utility model;

[0020] Figure 2 It is a cross-sectional view of a speed regulating device of a record player of the utility model;

[0021] Figure 3 This is a cross-sectional view of a lifting device of a speed regulating device of a record player according to the utility model;

[0022] Figure 4 The utility model is a circuit schematic diagram of a speed regulating device for a record player.

[0023] Legend:

[0024] 1. Box; 2. Turntable; 3. First rotating shaft; 4. Turning block; 5. Rotor; 6. Tonearm; 7. Pickup; 8. Stylus; 9. On button; 10. Off button; 11. First driven gear; 12. Second driven gear; 13. Lifting device; 14. Turning rod; 15. Knob; 16. Pointer; 17. Transparent scale; 18. Motor; 19. Second rotating shaft; 20. Second driving gear; 21. First driving gear.

[0025] 131. threaded rod; 132. driven bevel gear; 133. nut seat; 134. limit rod; 135. support column; 136. top block; 137. slide groove; 138. driving bevel gear. DETAILED DESCRIPTION

[0026] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0027] Reference Figure 1-4 The utility model embodiment is a speed regulating device for a record player, which includes a box body 1, an opening button 9 is arranged on the upper surface of the box body 1, a closing button 10 is arranged on the upper surface of the box body 1, a turntable 2 is rotatably connected to the top of the box body 1, a first rotating shaft 3 is fixedly connected to the middle of the turntable 2, a rotating block 4 is fixedly connected to the right side of the upper surface of the box body 1, a rotor 5 is fixedly connected to the right side of the upper surface of the box body 1, a tonearm 6 is rotatably connected to the top of the rotor 5, a cartridge 7 is fixedly connected to the front end of the tonearm 6, a stylus 8 is fixedly connected to the lower surface of the cartridge 7, a transparent scale 17 is arranged on the right side of the box body 1, a first rotating shaft 3 is rotatably connected to the left side of the interior of the box body 1, and a stylus 8 is fixedly connected to the top of the first rotating shaft 3. A first driven gear 11, a second driven gear 12 is fixedly connected to the middle of the first rotating shaft 3, a lifting device 13 is fixedly connected to the right side of the inside of the box body 1, a rotating rod 14 is provided on the right side of the lifting device 13, a knob 15 is fixedly connected to the right end of the rotating rod 14, a motor 18 is fixedly connected to the top of the lifting device 13, a second rotating shaft 19 is fixedly connected to the output end of the motor 18, a first driving gear 21 is fixedly connected to the upper end of the second rotating shaft 19, a gear ratio of the first driving gear 21 to the first driven gear 11 is 1:1, a second driving gear 20 is fixedly connected to the lower end of the second rotating shaft 19, and a gear ratio of the second driving gear 20 to the second driven gear 12 is 2:1.

[0028] The above structure can place a record by providing a turntable 2, and a tonearm 6 is provided, and a pickup 7 is provided at the front end of the tonearm 6, and a stylus 8 is fixedly connected to the lower end of the stylus 7. When the tonearm 6 is rotated and the stylus 8 is pressed against the record, the record rotates under the drive of the turntable 2, thereby realizing the operation of the record player.

[0029] Driven by the motor 18, the second rotating shaft 19 rotates, and the second rotating shaft 19 drives the first driving gear 21 and the second driving gear 20 to rotate simultaneously. When the first driving gear 21 is meshed with the first driven gear 11, the rotation speed of the first rotating shaft 3 is twice the rotation speed of the second rotating shaft 19. When the second driving gear 20 is meshed with the second driven gear 12, the rotation speed of the first rotating shaft 3 is the same as the rotation speed of the second rotating shaft 19.

[0030] By providing the pointer 16 and the transparent scale 17, when the second driving gear 20 is meshed with the second driven gear 12, the pointer 16 will be located above the transparent scale 17, and when the first driving gear 21 is meshed with the first driven gear 11, the pointer 16 will be located below the transparent scale 17. After adjusting the speed, the user can intuitively observe whether the current speed is single speed or double speed.

[0031] The lifting device 13 is rotatably connected with a threaded rod 131 inside, a driven bevel gear 132 is fixedly connected to the bottom of the threaded rod 131, a driving bevel gear 138 is meshed on the right side of the driven bevel gear 132, a rotating rod 14 is fixedly connected to the right side of the driving bevel gear 138, a knob 15 is fixedly connected to the other end of the rotating rod 14, a nut seat 133 is threadedly connected to the top of the threaded rod 131, a limiting rod 134 is fixedly connected to the left and right sides of the nut seat 133, a pointer 16 is fixedly connected to the right end of the right limiting rod 134, a transparent scale 17 is slidably connected to the other end of the pointer 16, a supporting column 135 is fixedly connected to the left and right sides of the upper surface of the nut seat 133, a top block 136 is fixedly connected to the upper end of the supporting column 135, and a slide groove 137 is provided on the right side of the lifting device 13.

[0032] By turning the knob 15, the rotating rod 14 is driven to rotate, the rotating rod 14 drives the active bevel gear 138 to rotate, the active bevel gear 138 is linked to the driven bevel gear 132 to rotate, the driven bevel gear 132 drives the threaded rod 131 to rotate, the threaded rod 131 drives the nut seat 133 to move up and down, when the nut seat 133 moves upward, the support column 135 is pushed upward, the support column 135 pushes the top block 136 to move upward, the top block 136 pushes the motor 18 to move upward, when the top block When 136 runs to the upper vertex, the first driving gear 21 is separated from the first driven gear 11, and the second driving gear 20 is meshed with the second driven gear 12. When the nut seat 133 moves downward, it drives the support column 135 to move downward, the support column 135 drives the top block 136 to move downward, and the top block 136 drives the motor 18 to move downward. When the top block 136 runs to the lower vertex, the first driving gear 21 is meshed with the first driven gear 11, and the second driving gear 20 is separated from the second driven gear 12.

[0033] By providing the limiting rod 134 , the stability of the nut seat 133 can be maintained when it moves up and down.

[0034] Working principle: When the speed regulating device of the record player is working, the switch of the motor 18 is first turned on, but the motor 18 is not working at this time. The record is placed on the turntable 2, and the tonearm 6 is rotated so that the stylus 8 is pressed onto the record. At this time, the start button 9 is pressed, and the motor 18 starts to work, driving the turntable 2 to run. By turning the knob 15, the speed of the turntable 2 can be adjusted, that is, the speed of the record can be adjusted. By observing the transparent scale 17, it can be observed that the working state of this device is at one speed or at two speeds.

[0035] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A speed regulating device for a record player, characterized in that: The invention comprises a housing (1), wherein a turntable (2) is rotatably connected to the top of the housing (1), a first rotating shaft (3) is fixedly connected to the middle of the turntable (2), a rotating block (4) is fixedly connected to the right side of the upper surface of the housing (1), a rotor (5) is fixedly connected to the right side of the upper surface of the housing (1), a tonearm (6) is rotatably connected to the top of the rotor (5), a pickup (7) is fixedly connected to the front end of the tonearm (6), and a stylus (8) is fixedly connected to the bottom surface of the pickup (7); the first rotating shaft (3) is rotatably connected to the left side of the interior of the housing (1), and a first driven gear (9) is fixedly connected to the top of the first rotating shaft (3). 11), a second driven gear (12) is fixedly connected to the middle of the first rotating shaft (3), a lifting device (13) is fixedly connected to the right side of the interior of the box body (1), a rotating rod (14) is arranged on the right side of the lifting device (13), a knob (15) is fixedly connected to the right end of the rotating rod (14), a motor (18) is fixedly connected to the top of the lifting device (13), a second rotating shaft (19) is fixedly connected to the output end of the motor (18), a first driving gear (21) is fixedly connected to the upper end of the second rotating shaft (19), and a second driving gear (20) is fixedly connected to the lower end of the second rotating shaft (19).

2. A record player speed regulating device according to claim 1, characterized in that: An opening button (9) is provided on the upper surface of the box body (1), and a closing button (10) is provided on the upper surface of the box body (1).

3. A record player speed regulating device according to claim 1, characterized in that: A transparent scale (17) is arranged on the right side of the box (1).

4. A record player speed regulating device according to claim 1, characterized in that: The lifting device (13) is rotatably connected to a threaded rod (131) inside, a driven bevel gear (132) is fixedly connected to the bottom of the threaded rod (131), a nut seat (133) is threadedly connected to the top of the threaded rod (131), and limit rods (134) are fixedly connected to the left and right sides of the nut seat (133), and support columns (135) are fixedly connected to the left and right sides of the upper surface of the nut seat (133), and a top block (136) is fixedly connected to the upper end of the support column (135). A slide groove (137) is provided on the right side of the lifting device (13).

5. A record player speed regulating device according to claim 4, characterized in that: The right side of the driven bevel gear (132) is meshed with a driving bevel gear (138), the right side of the driving bevel gear (138) is fixedly connected to a rotating rod (14), and the other end of the rotating rod (14) is fixedly connected to a knob (15).

6. A record player speed regulating device according to claim 4, characterized in that: The right end of the right-side limiting rod (134) is fixedly connected to a pointer (16), and the other end of the pointer (16) is slidably connected to a transparent scale (17).

7. A record player speed regulating device according to claim 1, characterized in that: The gear ratio between the first driving gear (21) and the first driven gear (11) is 1:

1.

8. A record player speed regulating device according to claim 1, characterized in that: The gear ratio between the second driving gear (20) and the second driven gear (12) is 2:1.

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