JPS5824555Y2 - Pickup Cartridge - Google Patents

Description

[Detailed explanation of the invention] This invention is an MC (moving coil) for stereo playback.
This relates to a type pickup cartridge.

Generally, it is desirable for the vibration system of a big amplifier cartridge to vibrate faithfully according to the vibration waveform carved in the sound groove of a record, but external factors that affect the vibration of the vibration system during playback and their magnitude are It varies depending on the direction, and is particularly different between the horizontal direction and the vertical direction.

For example, the vibration caused by the warping of a record has almost a vertical component and very little horizontal component, and the stylus pressure load applied to the stylus at the tip of the vibration system acts vertically and has almost no horizontal component. It doesn't matter.

When dealing with this difference in the effects on vibration in the vertical and horizontal directions, it may be better to make the mechanical vibration characteristics of the pickup cartridge different in the horizontal and vertical directions. be.

For example, when trying to eliminate the effects of vibrations caused by warped records as mentioned above, it is important to note that most of the vibrations in the ultra-low frequency range caused by warped records are vertical components, and the sound grooves of records are Most of the components in the ultra-low frequency range of a musical sound signal recorded in a music signal are in-phase components of the left and right channels, that is, they are horizontal components. It is considered that it is sufficient to cut only the vertical component of .

However, if we simply increase the stiffness of the entire damper to support the vibration system, all vibrations in the ultra-low range will be cut out, both vertically and horizontally.As a result, the record as described above This results in the inconvenience that not only the vertical vibrations caused by the warping of the disc but also the horizontal vibrations of the ultra-low range components of the musical tone signal must be cut.

However, in conventional pickup cartridges, the vibration waveforms of the left and right channels, which are carved on each slope of the sound groove of a record that is 90 degrees to each other and inclined 45 degrees with respect to the horizontal direction, are transmitted in a direction perpendicular to each slope. In other words, since the signal output of the left and right channels is directly detected as vibrations tilted at 45 degrees in the horizontal and vertical directions, complete structural and electrical symmetry is required, and therefore the vibration system must be completely symmetrical. It has been inappropriate and difficult to differentiate the mechanical vibration characteristics in the horizontal and vertical directions.

For example, as shown in FIGS. 1 and 2 in the case of a conventional MC type pickup cartridge, a cantilever 2 having a regenerating needle 1 at its tip is attached to the base end of the cantilever 2 along two directions inclined at 45 degrees with respect to the horizontal and vertical directions. An X-shaped armature 3, in other words, an armature 3 formed with protruding pieces 3A to 3D protruding in four directions inclined at 45 degrees with respect to the horizontal and vertical directions is attached, and each protruding piece 3A of this armature 3 is attached.
A known system is one in which a pair of left and right detection coils 4A and 4B are wound around 3D, and a vibration system 5 configured in this manner is arranged such that the armature 3 is located in the gap 1 of the magnetic circuit 6. , the button on the MC type pickup cartridge with this configuration is 45 mm on the left and right with respect to the vertical direction.
Since the vibration of the playback needle 1 in the direction inclined by 1 degree is detected as the rotation of the armature 3 around the axis in the above direction, it is necessary to have symmetry in that the button can be pressed in a direction inclined 45 degrees to the left and right with respect to the vertical direction. Therefore, it is extremely difficult to construct a vibration system that is suitable for both horizontal and vertical vibrations.

This idea was devised in view of the above circumstances, and was developed in order to advantageously deal with the difference in the effects of vertical and horizontal vibrations, such as vibrations caused by warping of records. The object of this invention is to configure a vibration system to be compatible with both directional vibration and vertical vibration.

In other words, this idea is based on the vibration waveform of the left and right slopes of the sound groove of a record, in other words, the vibration waveform of the left and right channels, in which the sum of the left and right signals is carved in the horizontal direction, and the difference between the left and right signals is carved in the vertical direction. Focusing on this, the horizontal vibration and vertical vibration are detected, and the signal output of the left or right channel is obtained by the sum, and the signal output of the right or left channel is obtained by the difference. The stiffness in the vertical direction is higher than the stiffness in the horizontal direction, and by matching the direction in which the mechanical vibration characteristics are different with the vibration detection direction, the mechanical characteristics in the direction of the vibration force of the vibration system can be improved. The structure for making the difference is simplified, and noise caused by, for example, warping of a record disc can be easily reduced without adversely affecting the pond.

Hereinafter, embodiments of this invention will be described in detail with reference to the drawings.

FIG. 3 is a diagram schematically showing the overall configuration of the MC type pickup cartridge according to this invention, in which the magnetic circuit 10 is composed of a permanent magnet 11 and a permanent magnet 110 having both poles, similar to the known orthophone type MC type pink amplifier cartridge. The magnet connected to the yoke piece 12.13 made of material,
From the end side of one yoke piece 12 to the other yoke piece 13
A gap (magnetic gap) 15 is formed between the tip of the pole piece 14 and the yoke piece 13, and the tip of the yoke piece 13 has a An insertion hole 16 is formed into which a cantilever, which will be described later, is inserted.

An armature 18 made of a highly permeable magnetic material such as Permalloy or Alperm is attached to the tip of the pole piece 14 via a damper 17 made of an elastic material such as rubber.

This armature 18 is attached to the rear end of a cantilever 200 that has a regenerated needle 19 attached to its tip.
A vibration system 21 (see FIG. 4) is constituted by these.

Further, as shown in FIGS. 4 and 5, the armature 18 includes a pair of vertical protruding pieces 18B and 18C that protrude substantially vertically upward and substantially vertically downward from the central portion 18A, and a pair of vertical protrusions 18B and 18C that protrude substantially horizontally from the central portion 18A. A pair of horizontal projecting pieces 18D projecting to the left and right.

18E is formed, thereby making the overall shape of a vertical button and a cross along the horizontal direction.

In this embodiment, the horizontal projecting piece 18D. 18E, the protrusion length gL from the central portion 18A is the vertical protrusion portion 18B, 1
It is set to be shorter than the same protruding length L' of 8C.

Note that the back surface of the armature 18 is the disk-shaped damper 17.
The center of the armature 18 is connected to the pole piece 1 by a suspension wire (not shown).
4, so that the armature 18 vibrates with its center as the fulcrum O.

As will be described later, the armature 18 also has vibrations in the vertical direction of the regeneration needle 19, that is, the armature 18.
Vertical coil group 22 for detecting rotation around the horizontal axis of
and a horizontal coil group 23 for detecting the horizontal vibration of the regeneration needle 19, that is, the rotation of the armature 18 around the vertical axis.

With the above configuration, the armature 18 contacts the damper 17 over a long distance in the vertical direction from the central fulcrum O, and contacts the damper 17 over a short distance in the horizontal direction from the fulcrum 07Jh.

Therefore, the armature 18 has different mechanical vibration characteristics for vibrations around the horizontal axis, that is, vertical vibrations of the regeneration needle 19, and mechanical vibration characteristics for vibrations around the vertical axis, that is, horizontal vibrations of the regeneration needle 19. It is difficult to rotate in response to vibrations in the vertical direction, and easy to rotate in response to vibrations in the horizontal direction.

For this reason, while the vertical component of ultra-low frequency vibrations is cut out, the horizontal component is hardly cut out.

FIG. 5 and FIG. 6 are diagrams showing other configuration examples for differentiating mechanical vibration characteristics in the horizontal direction and the vertical direction. , 18E are different from the example shown in FIG. 4, and have approximately the same length.

On the other hand, the damper 17 inserted between the armature 18 and the pole piece 14 includes a pair of upper and lower first damper pieces 17A, 17A made of an elastic material with low compliance;
' and a central second damper piece 17B made of an elastic material with large compliance. Projection piece 18D, 1
8E and the central portion 18A are supported by the second projecting piece 17B, and the lower vertical projecting piece 18C is supported by the other first damper piece 17A.
’ is supported.

Note that the armature 18 is held by the pole piece 14c by a suspension wire, as in the previous embodiment.

In this configuration, the rotation of the armature 18 around the horizontal axis is mainly caused by the first
Since the damper pieces 17A and 17A' act, the regenerated needle 19
The second damper piece 17B exhibits stiffness and deflection against vibrations in the vertical direction, while compliance mainly changes against rotation around the vertical axis of the Ryoichi maturer 18.
acts, the stiffness becomes small with respect to the horizontal vibration of the reproduction needle 19, and as a result, as mentioned above, the vertical component of ultra-low frequency vibration is cut out, but the horizontal component is almost cancelled. Not possible.

Next, to explain the specific winding mode of the vertical coil group 22 and the horizontal coil group 23, FIG. For example, it is composed of a first vertical coil 22Ai- and a second vertical coil 22B, both vertical coils 22A,
22B are wound in the same direction across both vertical projecting pieces 18B and 18C, respectively.

The cut horizontal coil group 23 also includes an even number of horizontal coils, for example, the first horizontal coil 23A and the second horizontal coil 2.
3B, and the horizontal coils 23A and 23B are wound in the same direction across both horizontal projecting pieces 18D and 18E, respectively.

Here, the positive terminals Va and Vb are the upper ends of both vertical coils 22A and 22B in the diagram, and the negative terminals Va and Vb are the lower ends of the diagram, and the left terminals of both horizontal coils 23A and 23B are If the terminals are assumed to be positive terminals Ha and Hb, and the terminals on the right side of the diagram are assumed to be negative terminals Ha and Hb, each coil 22A.

22B, 23A, 23Bvi are connected as shown in FIG.

That is, the negative terminal Ha of the first horizontal coil 23A and the first
is connected to the positive terminal Va of the vertical coil 22A, and the positive terminal Ha of the first horizontal coil 23A is connected to the positive terminal Ha of the first vertical coil 22A.
The negative terminal Va of A is the left channel output terminal.

The negative terminal HB of the twisted second horizontal coil 23B and the negative terminal vb of the second vertical coil 23B are connected, and the positive terminal HB of the second horizontal coil 23B and the positive terminal vb of the second vertical coil 22B are connected. This is the right channel output terminal.

Therefore, while the first horizontal coil 23A and the first vertical coil 22A are electrically connected in the forward direction,
The second horizontal coil 23B and the second vertical coil 22B are electrically connected in opposite directions.

In the above configuration, when the button is pressed during playback, the playback needle 1 follows the waveform of the left and right slopes of the sound groove of the record (not shown).
9 vibrates, the armature 18 also vibrates within the magnetic gap 15, and each coil traverses the magnetic flux, and the vertical coils 22A and 22B each obtain a voltage output Ev proportional to the vibration speed in the vertical direction. , and horizontal coil 23
A.

From 23B, a voltage output E■ proportional to the vibration speed in the horizontal direction is obtained.

Here, the vibration waveforms of the left and right channels are separately engraved on the 45-degree slope on the left and right of the sound groove of the record, but as mentioned above, the sum of the left and right signals in the horizontal direction is the same as the sum of the left and right signals in the vertical direction. Since the signal difference is sharp, the horizontal coils 23A and 2
The output EH of 3B is the sum of the signal voltage EL of the left channel and the signal voltage ER of the right channel.
The output Ev of 2A and 22B is the signal voltage E of the left and right channels.
This is the difference between L and ER.

That is, EH = EL + ER (1) Ev = E
L-ER・-”・”(2)

On the other hand, since the first horizontal coil 23AJ- and the first vertical coil 22Ari are electrically connected in series in the forward direction, the output Ea generated between the terminals Ha and Va at both ends of this series coil is the vertical output E (1) is the sum of the horizontal output EH, and since the second horizontal coil 23B and the second vertical coil 22B are electrically connected in opposite directions, the output is generated between the terminals Hb and Vb at both ends of this series coil. The output Eb is the difference between the horizontal output EH and the vertical output Ev.

That is, E a = EH + EV・””(3) Eb = EH - Ev (4).

As is clear from equations (1) to (4), Ea=2EL
・・・・・・・・・(5) Eb=2E4 ・・
......(6).

That is, the output Ea between the terminals Ha and Va is proportional to the signal output of the left channel, and the output Ea between the terminals Ha and Va is proportional to the signal output of the left channel.

Since the output Eb between Vb and Vb is proportional to the signal output of the right channel, the left and right channel signals can be separated and extracted.

The vertical coil group 22 button and the horizontal coil group 23 do not necessarily have to be composed of an even number of coils. Depending on the wiring method, one coil group may be composed of an even number of coils and the other coil group may be composed of an odd number of coils. It may be composed of a coil.

For example, the vertical coil group 22 may be configured with one vertical coil 22A, and the horizontal coil group may be configured with a first horizontal coil 23A and a second horizontal coil 23B.

In this case, the winding configuration for the armature 18 is the seventh
Any configuration may be used as long as the second vertical coil 22B shown in the figure is removed.

Also in this case, the coils 22A and 23A. 23B is the 9th
Just connect the wires as shown in the figure.

That is, the first horizontal coil 23A and the vertical coil 22A are electrically connected in series in the forward direction, and the terminals Ha at both ends thereof are connected in series.
, if Va is set as the left channel output terminal, and the vertical coil 22A and the second horizontal coil 23B are electrically connected in series in opposite directions, and the terminals Va and Hb at both ends are set as the right channel output terminals. good.

Therefore, in this connection, the vertical coil 22A is commonly connected to both horizontal coils 23A and 23B.

With this configuration, an output 2EL proportional to the sum of the horizontal output EH and the vertical output E■, that is, the left channel signal output EL, is obtained between the terminals Ha and Va, and the output 2EL is proportional to the left channel signal output EL.
.

An output 2ER proportional to the difference between the horizontal output EH and the vertical output EV, that is, the output ER of the right channel, is obtained between Hb and Hb.

For example, the vertical coil group 22 is connected to the first vertical coil 22A.
and a second vertical coil 22B, and the horizontal coil group 23 may be composed of one horizontal coil 23A.

In this case, the winding configuration for the armature 18 is the seventh
The configuration is such that the second horizontal coil 23B shown in the figure is removed.

In the case of the great octopus, each coil 22A, 22B. 23B is the 10th
Just connect the wires as shown in the figure.

That is, the horizontal coil 23A and the first vertical coil 22A are electrically connected in series in the forward direction, and the terminals Ha at both ends are connected.
, Va may be used as the left channel output terminal, and the horizontal coil 23A and the second vertical coil 22B may be electrically connected in series in opposite directions, and the terminals Ha and Vb at both ends thereof may be used as the right channel output terminals. .

Therefore, in this configuration, the horizontal coil 23A is commonly connected to both vertical coils 22A and 22B.

With this configuration, an output 2EL proportional to the sum of the horizontal button and vertical output EH9Ev, that is, the left channel output ELK, can be obtained from between the terminals Ha and Va, and the output 2EL proportional to the left channel output ELK can be obtained from the terminals Ha and Va.
Signal of difference between horizontal and vertical output EH9EV from Vb,
That is, the signal output of the right channel ERK proportional output 2
ER is obtained.

Furthermore, even if an even number of horizontal and vertical coils are wound as described above, it is not necessarily necessary to overlap each other, and the coils may be wound independently and separately on each of the protruding pieces 18B to 18E of the armature.

For example, as shown in FIG.
A first horizontal coil 23A is wound around D, and a second horizontal coil 23B is wound around the right horizontal projecting piece 18E in the same direction as the first horizontal coil 23A, and a lower vertical projecting piece 18E is wound with a second horizontal coil 23B. 18C, and a second vertical coil 22B is wound around the upper vertical projecting piece 18B in the same direction as the first vertical coil 22A, thereby forming the i-th horizontal coil 23A. The first vertical coil 22A is electrically connected in series in the forward direction, and the second horizontal coil 22A is electrically connected in series in the forward direction.
3B and the second vertical coil 22B are electrically connected in series in opposite directions.

In this case, between the terminals Ha and Va at both ends of the series circuit formed by the first horizontal coil 23A and the first vertical coil /R2A, the sum of the outputs EH1Ev of both coils, that is, the output 2EL proportional to the signal output ELF of the left channel is generated. The second one that got nine
The difference between the outputs EH1Ev of both coils, that is, the signal output ER of the right channel, between the terminals Hb and Vb at both ends of the series circuit formed by the horizontal coil 23B and the second vertical coil 22B.
An output 2ER proportional to is obtained.

According to such a configuration, the wires of each coil are not located in the central portion 18AK of the armature 18.

Therefore, when winding each coil, the coil wire can be wound without passing near the cantilever 20, making the coil winding work simple and easy.

In addition, in the embodiment, both horizontal coils 23A, 23
B are wound in the same direction and both vertical coils 22A,
Although the connection shown in 11 is when the coils 22B are wound in the same direction, it is also possible to connect both horizontal coils 23A and 23B in opposite directions, or connect both vertical coils 23A and 23B in opposite directions.
22A and 22B may be connected in opposite directions, and in either case, take into account the winding direction of each coil and calculate the sum, total, and difference between the output of the horizontal coil and the output of the vertical coil. All you have to do is connect each coil.

In the above embodiment, the horizontal coil and the vertical coil are wound separately and connected.
Of course, the horizontal coil and the vertical coil may be wound continuously.

As shown in the above embodiments, if the stiffness against vertical vibrations is higher than the stiffness against horizontal vibrations, it is possible to cut only the vertical components without canting the horizontal components of vibrations in the ultra-low frequency range. becomes possible.

The vibrations caused by the warping of the record are mainly vibrations in the ultrasonic range of about 1OH2 or less, and most of these vibrations have vertical components. Musical tone signals are mostly in-phase components, that is, horizontal signals.

Therefore, according to each of the above-mentioned embodiments, only the vibration caused by the warping of the record can be cut, and the musical tone signal can be
can be effectively reproduced.

As is clear from the above explanation, the pick amplifier cartridge of this invention detects the difference between the horizontal signal and vertical signal from the sound groove of a record to obtain left and right channel signals, and also detects the stiffness in the vertical direction. Since the stiffness is larger than the stiffness in the horizontal direction, factors that affect the vibration system are It is possible to obtain the optimal vibration characteristics as a countermeasure by taking into account the difference between the two directions and the vertical direction.In particular, it is possible to obtain the optimum vibration characteristics as a countermeasure by taking into account the difference between the two directions in which the mechanical vibration characteristics are different and the vibration detection direction of the vibration system. This has the effect of simplifying the configuration for varying the vibration characteristics.

[Brief explanation of drawings]

Fig. 1 is a schematic side view showing an example of a conventional pickup cartridge, Fig. 2 is a perspective view showing the vibrating part of the pink-up cartridge shown in Fig. 1, and Fig. 3 is an implementation of this invention applied to an MC type pickup cartridge. (Figure 4 is a perspective view showing an example of the vibrating part of the pickup cartridge in Figure 3. Figure 5 is the pink amplifier car in Figure 3.) 6 is a side view of the armature and damper, FIG. 7 is a schematic diagram showing an example of the winding configuration of the coil used in the cartridge of FIG. 3. , FIGS. 8 to 10 are diagrams each showing an example of the connection of the coil used in the cartridge of FIG. 3, and FIG. 11 is a schematic diagram showing another example of the winding configuration. 10... Magnetic circuit, 11... Magnet, 1
5... Gap, 17... Damper, 1
7A, 17A'... Damper piece, 18...
・Armature, 18I3.18C... Vertical projecting piece part, 18D, 18E... Horizontal projecting piece part, 19.
...Regenerated needle, 20...Cantilever, 2
1... Vibration section, 22A, 22B... Vertical coil, 23A. 23B...Horizontal coil.

Claims (3)

[Scope of utility model registration request] (1) Attach a button to the moving coil type pickup cartridge, provide a regeneration needle at the tip of the power/chire bar, attach an armature to the base end of the power/chire bar, attach this armature to the pole piece via a Danopa, and attach the regeneration needle to the base end of the power/chire bar. A coil wound around the armature detects the horizontal vibration and vertical vibration of the armature, and detects the left and right chamfers by the sum and difference of the horizontal signal and the vertical signal.
Configured to obtain the signal of the danopa network,
A pink-up cartridge configured such that the compliance of the armature with respect to horizontal vibrations is greater than the compliance of the armature with respect to vertical vibrations. (2) The armature is formed in the shape of a cross, including a horizontal projecting piece that projects left and right in the horizontal direction and a vertical projecting piece that projects up and down in the vertical direction. The pickup cartridge described in item 1. (3) The pink amplifier cartridge according to claim 1 or 2, wherein the armature is made of a high permeability magnetic material.