JPS5934238Y2 - Moving coil type pick-up cartridge - Google Patents

Description

[Detailed description of the invention] This invention relates to a moving coil type pink amplifier cartridge for stereo reproduction.

In general, moving coil type pink amplifier cartridges can be roughly divided into types in which the coil moves rotationally in a magnetic field and types in which the coil moves linearly in terms of the movement form of the generating coil in the vibration system.

Considering these two types, in the case where the coil rotates in a magnetic field, the magnetic gap cannot be made narrow due to the form of the coil's motion, and the coil cuts the magnetic flux in an oblique manner. Therefore, the drawback is that the power generation efficiency is generally low.

In order to obtain a high output voltage with this type of pink amplifier cartridge, the coil can be constructed by winding it around a core made of a high magnetic permeability material such as iron, but in such a configuration, the mass of the vibration system is This results in deterioration of characteristics such as compliance and trackability.

On the other hand, with a coil that moves linearly in a magnetic field, the magnetic gap can be made narrower and the magnetic flux density of the magnetic field can be increased, and the coil can cut the magnetic flux orthogonally, making effective use of the magnetic flux. power generation efficiency.

Therefore, in this type of pick amplifier cartridge, the power generation coil can be configured with a so-called air-core coil, the mass of the vibration system can be reduced, and each of the above-mentioned characteristics can be obtained favorably.

In addition, when considering the mechanical vibration characteristics of the generating coil of a moving coil type pickup amplifier cartridge from the perspective of obtaining a stereo signal, it is found that in a conventional moving coil type pickup cartridge, the waveform of each slope of the sound groove of a record is A method is adopted in which vibrations are directly detected in a direction perpendicular to the horizontal direction, that is, a direction inclined at 45 degrees with respect to the horizontal direction.

However, if we consider the mechanical vibration characteristics of the vibration system of a pick amplifier cartridge, we find that while the load applied to the stylus at the tip of the vibration system acts only in the vertical direction, it has almost no relation to the vibration in the horizontal direction. The factors that affect vibration and the magnitude thereof are different between the vertical and horizontal directions, such as the vibration caused by the warping of the motor acting only in the vertical direction.

Therefore, in the pickup cartridge, the structure should be adapted to the horizontal and vertical movements in order to eliminate the negative effects caused by each factor, taking into consideration the differences in the factors that affect horizontal and vertical vibrations. This is desirable.

In other words, it is desirable that the mechanical vibration characteristics of the vibration system be different in the horizontal and vertical directions.

However, in the conventional general vibration detection method, the output of the left and right channels is directly obtained by detecting vibrations in directions tilted 45 degrees to the left and right with respect to the horizontal and vertical directions.
Structural and electrical symmetry is required, and therefore it is inappropriate and difficult to make the mechanical vibration characteristics of the vibration system different in the horizontal and vertical directions as described above.

By the way, in the vibration waveform of the left and right slopes of the sound groove of a typical record, in other words, the vibration waveform of the left and right channels, 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.

Therefore, the tip of the needle in contact with the left and right slopes of the sound groove vibrates horizontally in accordance with the sum signal of the left and right channels, and vibrates in the vertical direction in accordance with the difference signal of the left and right channels.

Therefore, if the vertical vibration and horizontal vibration of the needle tip are detected separately and their sum signal and difference signal are obtained, the output signals of the left and right channels can be obtained.

According to such a detection method, vibrations are detected separately in the vertical and horizontal directions, so it is easily possible to construct a vibration system that is suitable for each of the vertical and horizontal movements, as described above. Become.

From the above-mentioned viewpoints, the applicant has developed a vibration system machine by linearly moving the coil of the vibration system to obtain a high output voltage, and by detecting the signal separately into horizontal vibration and vertical vibration. We have developed the moving coil type pink-up cartridge shown in Figures 1 and 2 to solve problems based on the vibration characteristics of the robot.

That is, in FIGS. 1 and 2, a disk-shaped coil support 3 is attached to the rear of a cantilever 2 having a needle tip 1 at its tip, and a coil support 3 is attached to the periphery of the coil support 3 in the vertical direction of the cantilever 2. Vertical coils 4a, 4
d and horizontal coils 4bt4c located in the left-right direction of the cantilever 2.

In this case, the vertical coil 4a. 4d is located on a vertical plane passing through the axis of the cantilever 2, and horizontal coil 4b
, 4c are located on a plane passing through the axis of the cantilever 2 and perpendicular to the vertical plane.

The cantilever 2 and coil support 3 are supported by a support 6 via a damper 5.

On the other hand, each coil 4a is centered around the axis of the cantilever 2.
In the circumferential direction where ~4d is located, magnets)7a~7d
are arranged in a ring shape, and each coil 4 is arranged between each of these magnets.
Magnetic gaps 8a to 8d are formed having magnetic fields in directions orthogonal to a to 4d, respectively.

However, when the pink amplifier cartridge configured as described above is pressed, when the stylus 1 captures a signal from the sound groove of the record 9 as a mechanical vibration, this vibration is transmitted to the cantilever 2,
The signal is transmitted to each coil 4a to 4d via the coil support 3.

Each of the coils 4a to 4d vibrates at a vibration center on the axis of the cantilever 2, for example, the center of the coil support 3, in the direction of the arrow shown in the figure, orthogonal to the magnetic flux B in the magnetic gaps 8a to 8d, so as to cut it. .

Due to the arrangement positions of the coils 4a to 4d, voltage is induced in the vertical coils 4a and 4d only by vibration in the vertical direction, and voltage is induced in the horizontal coils 4b and 4c only by vibration in the horizontal direction. .

Therefore, according to the above configuration, each coil 4a to 4d
Since the vertical coil 4a moves in a straight line, the magnetic flux can be used effectively and a high output voltage can be obtained.On the other hand, since the signal of the record sound groove is detected separately into vertical vibration and horizontal vibration, the vertical coil 4a , 4 d and horizontal coil 4 b , 4
There are advantages such as being able to compensate for deterioration of electrical characteristics etc. by appropriately adjusting the mechanical vibration characteristics with c.

However, according to the pink amplifier cartridge mentioned above,
Since the coils 4a to 4d of the vibration system are arranged in the vertical and horizontal directions of the cantilever 2, the vertical coil 4d among the coils 4a to 4d occupies the space below the cantilever 2, i.e. The shape of this pink-up cartridge is such that the rear lower part of the cantilever 2 bulges toward the record surface, and the length of the cantilever 2 is such that its tip position (the position where the needle tip 1 is attached) is shown in the figure A. If the length of the pick amplifier cartridge is short as shown in FIG. Therefore, problems such as an increase in the effective mass of the vibration system and a decrease in power generation efficiency occur.

This invention provides a moving coil type pink-up cartridge that eliminates the above drawbacks.
A vertical coil and left and right horizontal coils are placed on the rear peripheral edge of the cantilever, respectively, on an upper vertical imaginary plane passing through the axis of the cantilever and on horizontal imaginary planes on both left and right sides passing through the coaxial line. A vibration system is constructed by supporting the end portion so as to vibrate with the vibration center, and first to fourth magnets for applying a magnetic field to the coil are arranged between the respective coils, and these first to fourth magnets are connected to the entire body. The opposing end surfaces of these first to fourth magnets are respectively different single polarity magnetic pole surfaces, and there is a magnetic circuit between these opposing end surfaces. A magnetic field parallel to the coil axis direction is applied over the entire surface of the vertical coil and left and right horizontal coils arranged respectively, and the horizontal coil and the vertical coil are connected to a voltage induced by the horizontal coil. The wires are connected so as to obtain a sum voltage and a differential voltage with respect to the voltage induced by the vertical coil.

Each of the coils is composed of two horizontal coils, the horizontal coils being disposed on the left and right sides of the cantilever, and the vertical coils being composed of two vertical coils disposed above the cantilever.

Further, the two vertical coils are each configured in a spiral shape with different winding directions along a vertical plane, and the terminals on the inner end of the spiral of these vertical coils are connected, and the terminals on the outer end of each spiral are connected. This serves as an output terminal.

Further, the vertical coil may be composed of one vertical coil.

Furthermore, the horizontal coil and the vertical coil are connected so that a sum voltage and a differential voltage of the voltages induced by these coils can be obtained.

Embodiments of this invention will be described below with reference to FIGS. 3 to 9.

In these figures, the same parts as in the conventional example shown in FIGS. 1 and 2 are designated by the same reference numerals.

Figure 3 is a diagram showing the overall configuration of the pink amplifier cartridge according to this invention, where 1 is the needle tip, 2 is the cantilever, 3 is the coil support, 5 is the damper, 11a, 11a
' is a vertical coil unit, 11b.

11c is a horizontal coil unit, 7 b 27 a,
7C.

7d is a magnet; 12 is a support 6 for each of the magnets;
A fixing member to be fixed to the side, 13 is a holding member for the support body 6, 1
4 is an exterior case.

Figures 4 and 5 show details of the main parts of the above configuration.
The needle tip 1 is attached to the tip 2a of the cantilever 2, and the coil support 3 is attached to the rear part 2b of the cantilever 2.

The coil support 3 is formed into a disk shape from a non-magnetic material such as synthetic resin, and is fitted and fixed to the cantilever 2 through a hole 15 formed in the center thereof.

Coil unit mounting grooves 16a to 16c are formed on the peripheral edge of the coil support 3 in the positional relationship shown in the figure, with the cantilever 2 at the center, above the cantilever 2, and in the left and right directions.A vertical coil unit is formed in the upper coil unit mounting groove 16a. )11a.

11a' is installed, and a horizontal coil unit (11b) is installed in the left and right coil unit installation grooves 16b and 16c, respectively.
t11c is installed.

Each of the coil bases) 11a to 11c has a similar structure, and if a fallen tree is used, the vertical coil unit 11a
As the details are shown in FIGS. 6 to 8, the coil base 17 is obtained by forming a silicone resin into a square plate.
A spiral vertical coil 4a made of a conductive material such as copper or aluminum is formed on one surface of the vertical coil 4a.
An insulating layer 18 made of an insulating material such as polyurethane or enamel resin is formed to cover the area a.

In this case, the vertical coil 4a is formed on the coil base 17a by means such as photoetching.

Further, in this vertical coil unit 11a, the connection terminal 19 on the spiral outer end side of the vertical coil 4a is connected to the coil base 1.
One side of 7a (the side where the vertical coil 4a is formed)
The connecting terminal 20 on the inner spiral end side passes through the coil base 17a and is led out to the other surface.

The vertical coil unit Nla is constructed as described above, and similarly, the vertical coil unit 11a' is constructed by forming a vertical coil 4a' on a coil base 17a' and forming an insulating layer 18. The horizontal coil unit 11b has a horizontal coil 4b on the coil base 17b.
The horizontal coil unit 11c is constructed by forming the horizontal coil 4c on the coil space 17c and forming the insulating layer 18 thereon.

And these coil units 11a, 11a
't 11b and 11c have one corner of each coil base as the mounting part (for example, the vertical coil unit 11
(In a, the corner 21 of the coil base 17a is used as the mounting part) The corresponding coil unit mounting grooves 16a to 1
6c is fitted and fixed.

In this case vertical coil base) 11 a, 11 a'
As shown in FIG. 9, both connecting terminals 20, 20 are connected, and the surfaces of the coil bases 17a, 17a' on which these connecting terminals 20, 20 are formed are pasted together, and these vertical coil units 11a, lla ' are integrated and the connecting terminals 19, 19 are used as output terminals and are fitted and fixed in the coil unit mounting groove 16a.

In this state, the spiral winding directions of the vertical coils 48 j 4 a' are opposite to each other, but the electrical winding directions are the same.

Each coil base N1a is attached to the coil support 3 in this way.

11b and 11c are vertical coil units 11a.

Cantilever 2 where 11a' passes through the axis of cantilever 2
(horizontal coil unit) located along the vertical virtual plane above the
11 b t 11 c A plane passing through the axis of the cantilever 2 and perpendicular to the vertical imaginary plane (horizontal imaginary plane passing through the axis of the cantilever 2 in the states shown in FIGS. 4 and 5)
It is located along.

Here, the coil axes of each of the coils 4a, 4a', 4b, and 4c are located perpendicular to the corresponding virtual plane.

The cantilever 2 and the coil support 3 are attached to the front surface of a cylindrical support 6 via a disc-shaped damper 5 made of an elastic material such as rubber.

That is, the damper 5 is interposed between the rear surface of the coil support 3 and the front surface of the support body 6, and the damper 5 is interposed between the rear surface of the coil support 3 and the front surface of the support body 6.
The suspension wire 26 is passed through the center hole 25 of the damper 5 between the support member 22 filled inside and the support member 24 inserted into the hole 23 in the center axial direction of the support body 6. is stretched and fixed, and the cantilever 2 and coil support 3 are supported by the suspension wire 26 on the support body 6 side.

Thus, needle tip 1, cantilever 2, coil support 3
, each coil unit 11a, 1la)llb.

11c, the damper 5, the support member 22, and the suspension wire 26 constitute a vibration system of this pick amplifier cartridge.

In this case, the center of vibration in this vibration system is set to be at the midpoint in the thickness direction of the coil support 3 on the axis of the cantilever 2, that is, at the rear end of the cantilever indicated by reference numeral 27 in FIG.

On the other hand, magnets 7a to 7d are annularly arranged in the circumferential direction around the axis of the cantilever 2, where the coil units 11a, 11a', llb, and 11c are located.

Magnets) 7a to 7d, each magnetic pole opening direction is curved along the circumferential direction, and each coil/l/, 1m is placed between the magnetic poles of adjacent magnets.
a, 11a', 11Lz11c coils 4a, 4a',
4b, 4c (coils 4a, 4a', 4b
, 4c) are formed in magnetic gaps 8a to 8c in which a magnetic field is formed.

That is, the N pole of magnet 7a and the S pole of magnet 7b
A magnetic gap 8a with vertical coil units lla and 11a' is formed between the magnets 7b and 7c, and a magnetic gap 8b with a horizontal coil unit H1b is formed between the magnets 7b and 7c.
A magnetic gap 8c having a horizontal coil unit l11c therebetween is formed.

In this case, each coil unit 11a, lla', 11b
.

11c is arranged so that the rear half of each coil 4a, 4a', 4b, 4c faces into the corresponding magnetic gap 8a to 8c.

At this time, the magnets 7a and 7b each have the shape of a single piece obtained by dividing a cylindrical body into four equal parts in the axial direction, but the magnets 7c and 7d are obtained by cutting the same divided piece further in the axial direction. exhibits a shape.

In other words, the magnets 7c and 7d are respectively arranged on the circumference centered on the axis of the cantilever 2,
The lower portions are cut 28 and 29 parallel to the plane where the horizontal coil units Nib and 11c are located, so that the lower portions are cut out.

In this way, the lower part of magnets 7c and 7d is cut 2.
8 and 29, so that there is a large space between the bottom surface of the pink amplifier cartridge and the record disc.

In addition, gap forming members 30 to 33 made of non-magnetic material such as synthetic resin and having the same cross-sectional shape as the magnets are attached to the front end surfaces of the magnets 7a to 7d. Unit 11a
, 11a', llb.

Braking material filling gaps 34 to 36 are formed in the front half of 11c, respectively, and are continuous with the corresponding magnetic gaps 8a to 8C and have the same gap width as these magnetic gaps.

These gaps 34-36 and magnetic gaps 8a-
During 8c, each near Ai/L/ :L Knee 7th 11
a) 11 a't 1 l b.

A braking material made of a viscous fluid such as syringe oil is interposed to provide a braking action to 11c.

As shown in FIG. 3, the magnets 7a to 7d are fixed to the front end of a fixed member 12 attached to a support 6 by bolts 37, and the support 6 gives a predetermined vertical tracking angle to the vibration system. It is attached to the holding member 13.

In the above configuration, each coil 4a, 4a' of the vibration system.

4bt4c, since the vertical coils 4a and 4a' are arranged vertically and the horizontal coils 4b and 4c are arranged horizontally, voltage is induced in the vertical coils 4a and 4a' only by vibration in the vertical direction. horizontal coil 4b
, 4c, a voltage is induced only by the horizontal vibration.

Therefore, in this vibration system, the signal carved in the sound groove of the record is detected separately into the vertical vibration component and the horizontal vibration component, so the vertical coil 4 a s 4
Deterioration of the electrical output characteristics can be prevented by appropriately varying the mechanical vibration characteristics of the horizontal coils d and the horizontal coils 4 b and 4 c.

That is, in this vibration system, vertical coil units 11a, 11a' and horizontal coil units llb.

11c, or change the vertical and horizontal stiffness of the damper 5, thereby vertical coils 4a, 4a and horizontal coil 4b,
4c and each corresponding mechanical vibration characteristics are different, resulting in vertical coil 4a 24a' and horizontal coil 4b
, 4c are configured so that differences in electrical output characteristics do not occur due to differences in respective movement directions.

Next, each coil 4a, 4a in the vibration system
.

To explain the connection state of the vertical coils 4b and 4c, as described above, the vertical coils 4a and 4a' are connected so that their winding directions are electrically the same, that is, the vertical coils 4a and 4a' Each output voltage v1゜■2
is connected so that it is positive.

In addition, the horizontal coils 4 b and 4 c have respective output voltages H1 and H
The horizontal coil 4a and the horizontal coil 4b are connected in a push-pull manner so that the number 2 is added.

As described above, since the sum output of the horizontal vibration output and the vertical vibration output is the left channel signal and the same difference output is the right channel signal, the vertical coil 4
The output terminals of each set of a, 4 a' and the horizontal coils 4b, 4c are connected to the sum voltage (v1+V2) of the output voltage H1 of the horizontal coil 4b and the output voltage (v1+V2) of the vertical coils 4a, 4a'.
H1+("1+V2)], that is, the left channel signal output is obtained, and at the same time the horizontal coil 4
Difference voltage between output voltage H2 of c and output voltage (■1 +■2) of vertical coils 4a and 4a' [H2-(v, +V2)
], that is, they are connected so that the right channel signal output can be obtained.

Note that the horizontal coil 4b. 4c each output voltage H1, H
2b, vertical coil 4a.

It is preferable to set the number of turns of the coil so that it is approximately equal to or equal to the output voltage (Vl +V2) of 4a'.

Based on the above configuration, in this pink-up cartridge, the lower portions of the magnets 7c and 7d are cut out, so that the lower portions of the magnets 7c and 7d do not bulge out, and as shown in FIG. Sufficient space can be obtained between the board and the board 50.

In this pickup cartridge, when the stylus 1 captures a signal from the sound groove of the record as a mechanical vibration, this vibration is transmitted to the cantilever 2 and the coil "J".
3 to each coil unit 11a, 11a with brL
, 11b, 11c, and each coil 4a, 4
Magnetic gaps 8a to which a', 4b, and 4c correspond, respectively.
Cut the magnetic flux of ~8c and connect vertical coils 4a, 4a'
A voltage due to vertical vibration is induced in the horizontal coil 4.
A voltage due to horizontal vibration is induced in b and 4c.

In this case, the movement direction of each coil 4a, 4a', 4b, 4c is a front-back direction with the vibration center position 27 of the vibration system as a fulcrum;
In other words, the cantilever 2 moves approximately linearly along the axial direction in the magnetic field of the corresponding magnetic gaps 8a to 8c, and each coil 4a, 4a', 4b, 4c crosses the magnetic flux in the magnetic field. It will be cut in a straight line.

For example, the vertical coils 4 a and 4 a' vibrate substantially linearly in a direction perpendicular to the direction of the magnetic flux B, as shown by arrows in FIG.

In addition, vertical coils 4 a, 4 a' and horizontal coil 4
b and 4c are designed to have different mechanical vibration characteristics so as to vibrate in the most suitable state for each vibration direction, so the movement can be performed without causing differences in electrical output characteristics due to differences in each movement direction. do.

Thus, the voltage due to vertical vibration taken out by the vertical coils 4a, 4a' and the voltage due to horizontal vibration taken out by the horizontal coils 4b, 4c are the sum voltage and the difference voltage of each set of coils. Therefore, the left and right channel signal voltages are separated and extracted.

In the above embodiment, we have described the case where the vibration system consists of two vertical coils (vertical coils 4 a and 4 a'), but as shown in FIG. may be configured.

That is, in FIG. 10, the vertical coil unit 11a is installed in the coil unit mounting groove 16a of the coil support 3.
The vertical coil is comprised only of the vertical coil 4a formed in the same coil unit 11a.

In this case, the connection state of each coil 4a, 4b 74c is determined by the output voltage V1. of each coil 4a, 4b, 4c. H
1, H2 is [H1+■1]-left channel signal, [
H2-vl]--The wiring should be connected so that it can be taken out as the right channel signal.

As is clear from the above description, according to this invention, a vertical coil and left and right horizontal coils are attached to the rear peripheral edge of the cantilever on an upper vertical imaginary plane passing through the axis of the cantilever and on both left and right sides passing through the coaxial line. The horizontal coil is arranged on a horizontal virtual plane, and a magnetic field parallel to the coil axis direction is applied to each coil, and the horizontal coil and the vertical coil are connected to each other by a voltage induced by the horizontal coil and a voltage induced by the vertical coil. The electrical and mechanical vibration characteristics in the horizontal and vertical directions can be easily varied as necessary, and the resulting As a result, the electrical output characteristics in the vertical and horizontal directions can be controlled, and excellent characteristics such as signal quality and separation between left and right channels can be obtained.

Furthermore, the configuration can be simplified compared to the conventional pink amplifier cartridge of this type that detects horizontal and vertical vibrations separately.

In addition, the magnetic field applied to the coil was created by having single-polarity magnetic pole faces facing each other, and the direction of the magnetic field was positioned parallel to the coil axis, and the coil moved linearly perpendicular to the magnetic field. The magnetic flux density can be increased and the magnetic flux can be used effectively, and as a result, high power generation efficiency can be obtained.

In addition, the coil does not protrude downward, and the magnetic circuit
Since the lower side is omitted, there is no bulge formed below the rear end of the cantilever, and therefore a sufficient space can be obtained between the lower surface of the pickup cartridge and the record surface.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view of a conventional pick amplifier cartridge, Fig. 2 is a view seen from the direction ◯ in Fig. 1, Fig. 3 is a partially sectional side view of the pickup cartridge according to this invention, and Fig. 4 5 is a front view of the same main part, FIG. 6 is a front view of the vertical coil unit in the pickup cartridge, FIG. 7 is a side view of the same, and FIG. 8 is an enlarged longitudinal sectional view of the main part. FIG. 9 is an explanatory view showing how the vertical coil unit is installed, and FIG. 10 is a front view of a main part showing another embodiment of the pickup amp car ridge. 11... Needle tip, 2... Cantilever 3... Coil support, 4 a, 4 a'-vertical coil, 4 b
, 4C...Horizontal coil, 7a-7d...Magnet, 8a-8c...Magnetic gap, 11a, 11
d... Vertical coil unit P:)') 11b, 11c.
...Horizontal coil unit, 19.20...Connection terminal.

Claims (4)

[Scope of utility model registration request] (1) Attach a vertical coil and left and right horizontal coils to the rear peripheral edge of a cantilever having a needle tip at its tip, on an upper vertical imaginary plane passing through the axis of the cantilever and on horizontal imaginary planes on both left and right sides passing through the coaxial line. A vibration system is constructed by arranging and attaching each coil axis such that each coil axis is perpendicular to each virtual plane corresponding to A first and a second magnet are placed between the plane and the left and right horizontal plate planes, with both end faces of each of these magnets facing the respective corresponding virtual planes, and one end face of each of these magnets facing each other. are arranged so that they face each other, and third and fourth magnets are arranged at positions opposite to the first and second magnets with respect to each of the left and right horizontal planes, and one of each of these magnets is arranged to face each other. are arranged so that the end faces of the magnets face the corresponding other end faces of the first and second magnets, and these first to fourth magnets collectively form a magnetic circuit in an annular arrangement with a missing portion on the lower side. These first to fourth
The opposing end faces of the magnet are each different single polarity magnetic pole faces, and a magnetic field parallel to the coil axis direction is applied over the entire surface of the vertical coil and left and right horizontal coils arranged between these opposing end faces. The horizontal coil and the vertical coil are connected to obtain a sum voltage and a difference voltage between the voltage induced by the horizontal coil and the voltage induced by the vertical coil. Features a moving coil pickup cartridge. (2) A request for registration of a utility model in which the horizontal coil is composed of two horizontal coils arranged on the left and right sides of the cantilever, and the vertical coil is composed of two vertical coils arranged above the cantilever. The moving coil type pink-up cartridge described in item 1. (3) The two vertical coils are configured in a spiral shape with different winding directions along a vertical plane, and the terminals on the inner end of the spiral are connected, and the terminals on the outer end of each spiral are connected. A moving coil type pick amplifier cartridge according to claim 2, which serves as an output terminal. (4) A request for registration of a utility model in which the horizontal coil is composed of two horizontal coils arranged on the left and right sides of the cantilever, and the vertical coil is composed of one vertical coil arranged above the cantilever. The moving coil type pink amplifier cartridge described in item 1.