CN216084304U - Tone arm - Google Patents

Abstract

The utility model discloses a tone arm, which comprises a tone arm unit and a base support, wherein the tone arm unit is arranged on the base support and comprises a pulley, a guide rail and a tone arm rod, the guide rail is arranged at the top end of the pulley and can slide on the surface of the pulley, the tone arm rod is arranged at the top end of the guide rail, the guide rail and the tone arm rod are fixedly connected through a connecting block, the tone arm rod comprises a tone head, a tone head frame and a balancing weight, the tone head frame is arranged at one end of the tone arm rod, the tone head is arranged on the tone head frame, and the balancing weight is arranged at the other end of the tone arm rod.

Description

Tone arm

Technical Field

The utility model belongs to the technical field of sound equipment, and particularly relates to a tone arm.

Background

In the conventional vinyl record playing system, the main task of the tone arm is to carry the pickup head so that the stylus picks up the signal, and it is the first important to how the stylus picks up the most accurate signal, and all the concepts of the tone arm design are designed to achieve this task. According to the tracking operation of the tone arm, the fixed-fulcrum tone arm and the linear tracking tone arm (also called tangential tone arm or direct-cut tone arm) can be divided.

Fixing a fulcrum tone arm: most of the tone arms on the market are still fixed fulcrum tone arms, the fixed fulcrum tone arms are fixed on one side of a turntable and pass through the turntable in an arc shape in a mode of rotating tone arm fulcrum shafts, because the slicing knife works in a tangent mode when a disc master disc is carved, but due to the physical characteristics, the fixed fulcrum tone arms work only when the fixed fulcrum tone arms run to be vertical to the radius of a circle, so that the needle can fall on the tangent point position, and even if the fixed fulcrum tone arms work in an arc shape, only one point and two points show tangents, and the rest have errors which are called tracking errors.

Linear tracking tone arm: since the linear tracking tone arm has a working mode closest to the engraving, the linear tracking tone arm is always ideal for sound designers, but the linear tracking tone arm can be manufactured only in the near future, in the seventies, the first hardman Kardon manufactures a first turntable of the linear tracking tone arm driven by a motor according to the motor driving principle of a disc engraving machine, and therefore, various factories in japan also mass-produce the linear tracking tone arm (also called an electric servo linear tracking tone arm) driven by the motor.

However, for various reasons (e.g., the inability to adjust the needle pressure due to structural constraints, and the availability of a dedicated T4P cartridge), this type of product has failed to enter the hall of high-class tone arms, and until the eighties, the first family found a straight tracking tone arm without motor power, namely the ET1 tone arm of the american ET (engine technology), which was the earliest passive straight tracking tone arm, was of an air-bearing design, and from which substantially all of the tone arms of the air-bearing design have been derived. However, the air-float design has many problems, such as different sound quality of the played back sound and blockage of the air port, which are affected by the air pressure of the air supply.

Later, Souther in the united states manufactured a completely mechanical linear tracking tone arm, used a smooth quartz rod as a linear tracking guide rail, and used a small pulley to carry a tone head to move on a record, so as to normally walk and make linear tracking. Moreover, when the tone arm rod floats up and down along with the record, the pulley participates in the up-and-down floating to generate angular displacement, so that the radial and axial loads of the pulley bearing are variable, slight angular displacement between the inner ring and the outer ring of the bearing is caused, and the tracking precision is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model solves the problems that: the tone arm rod is connected with the guide rail, the lower end of the guide rail is provided with the pulley, so that the tracking precision of the tone arm is improved, the number of virtual positions is small during working, the structure is stable, and the needle pressure of a stylus is stable.

In order to achieve the purpose, the technical scheme of the utility model is as follows: the utility model provides a tone arm, includes tone arm unit and base support, be equipped with on the base support tone arm unit, tone arm unit includes pulley, guide rail and singing armed lever, the top of pulley is equipped with the guide rail, the guide rail can the pulley surface slides, the guide rail top is equipped with singing armed lever, the guide rail with through connecting block fixed connection between the singing armed lever, the singing armed lever includes record head, record head frame and balancing weight, record arm lever one end the singing head frame, record head frame has the record head, the record arm lever other end is equipped with the balancing weight.

Furthermore, the bottom end of the base support is fixedly connected with the surface of a turntable chassis, and a turntable is arranged on the surface of the turntable chassis.

Further, the base support is also provided with a lifting arm support and a signal wire suspension frame.

Furthermore, the signal wire suspension frame is provided with a signal wire.

Furthermore, the number of the pulleys is two, and the pulleys are fixed on the base support.

Further, the pulley external diameter is 30 mm.

Further, the signal line is a 4-core flexible wire.

The utility model has the technical effects and advantages that: singing the armed lever with the guide rail links together and forms integrative constitution structure, the pulley is located the lower extreme of guide rail, this structure is eliminated when singing, singing the armed lever when the record fluctuates, make the pulley participates in this fluctuation and the angle displacement that produces to avoided traditional singing armed lever and pulley integral type design to lead to the situation of slight angle displacement between the bearing inner and outer lane that pulley bearing is radial and the changeable arouses of axial load, the utility model makes the pulley only bears radial load this design at the during operation can make singing arm tracking precision improves, and the during operation virtual position is few, stable in structure, and the needle pressure of gramophone is stable.

Drawings

Fig. 1 is an overall top view of the present invention.

Fig. 2 is a schematic side view of the present invention.

Fig. 3 is a schematic diagram of the tone arm unit of the present invention.

Fig. 4 is a schematic overall front view structure of the present invention.

Detailed Description

As shown in fig. 1 to 4, a tone arm includes a tone arm unit 100 and a base frame 200, wherein the tone arm unit 100 is provided on the base frame 200.

The bottom end of the base support 200 is fixedly connected with the surface of a turntable chassis 10, a turntable 11 is arranged on the surface of the turntable chassis 10, when the turntable is used, a record is placed on the turntable 11, and the turntable 11 drives the record to rotate.

The tone arm unit 100 includes a pulley 110, a guide rail 120, and a tone arm lever 130, wherein the guide rail 120 is disposed at a top end of the pulley 110, the guide rail 120 is slidable on a surface of the pulley 110, and the tone arm lever 130 is disposed at a top end of the guide rail 120.

In a specific implementation, the guide rail 120 and the tone arm 130 are fixedly connected 111 through a connecting block, the pulley 110 allows the tone arm 130 to translate with the lowest friction resistance, and when the diameter of the bearing is fixed and the friction coefficient of the bearing is fixed, the larger the diameter of the wheel is, the smaller the rolling friction resistance of the wheel rolling on the wheel circumference is.

The pulley 110 sets up to two, all fixes on the base support 200, the pulley 110 external diameter is 30mm, and effective roll diameter is 20 mm.

The tone arm lever 130 includes a tone head 131, a tone head holder 132 and a weight 133, the tone head holder 132 is disposed at one end of the tone arm lever 130, the tone head holder 132 is disposed with the tone head 131, and the tone head 131 contacts with the recording surface on the surface of the turntable 11 during operation.

The other end of the tone arm 130 is provided with the weight 133.

The base bracket 200 is further provided with a lifting arm frame 210 and a signal wire suspension frame 220, the signal wire suspension frame 220 is provided with a signal wire 221, and the signal wire 221 is a 4-core flexible wire.

When the record player is used, tone arm rod 130 with guide rail 120 links together and forms integrative constitution structure, pulley 110 locates the lower extreme of guide rail 120, this structure is eliminated when singing, tone arm rod 130 makes when the record floats from top to bottom along with the pulley 110 participates in this fluctuation and the angle displacement that produces to avoided traditional tone arm rod and pulley integral type design to lead to the condition of slight angle displacement between the bearing inner and outer lane that pulley bearing radial and axial load are changeable to arouse, the utility model discloses make pulley 110 only bears radial load this design at the during operation and can make tone arm tracking precision improves, and the during operation virtual position is few, stable in structure, and the needle pressure of the gramophone is stable.

Claims (7)

1. A tone arm, comprising: comprises a tone arm unit (100) and a base support (200), wherein the tone arm unit (100) is arranged on the base support (200),

the tone arm unit (100) comprises a pulley (110), a guide rail (120) and a tone arm rod (130), the guide rail (120) is arranged at the top end of the pulley (110), the guide rail (120) can slide on the surface of the pulley (110), the tone arm rod (130) is arranged at the top end of the guide rail (120),

the guide rail (120) and the vocal arm lever (130) are fixedly connected through a connecting block (111),

the singing arm rod (130) comprises a singing head (131), a singing head frame (132) and a balancing weight (133), one end of the singing arm rod (130) is connected with the singing head frame (132), the singing head frame (132) is provided with the singing head (131), and the balancing weight (133) is arranged at the other end of the singing arm rod (130).

2. The tone arm of claim 1, wherein: the bottom end of the base support (200) is fixedly connected with the surface of a disc base (10), and a disc turntable (11) is arranged on the surface of the disc base (10).

3. The tone arm of claim 1, wherein: the base support (200) is provided with a lifting arm support (210) and a signal wire suspension frame (220).

4. A tone arm in accordance with claim 3, wherein: the signal wire hanging frame (220) is provided with a signal wire (221).

5. The tone arm of claim 1, wherein: the number of the pulleys (110) is two, and the pulleys are fixed on the base support (200).

6. The tone arm of claim 1, wherein: the outer diameter of the pulley (110) is 30 mm.

7. The tone arm of claim 4, wherein: the signal wire (221) is a 4-core flexible wire.

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