JPS6276396A - Pickup cartridge - Google Patents

Abstract

PURPOSE:To heighten teh efficiency of power generation and to miniaturize a device by providing a yoke having four leg parts on which coils are wound at the upper part of an armature and connecting two coils so as to offset an induced signal due to a prescribed inclination vibration of the armature. CONSTITUTION:At the other end of a cantilever 2, on one end of which a stylus 1 is mounted, a discoid armature 3 magnetized in the thickness direction is mounted. The armature 3 is supported so as to be able to vibrate obliquely setting the center in the thickness direction of a center axis as a supporting point. A yoke 8 having four leg parts 8-1-8-4 thinner than the armature 3 is arranged at the upper part of the armature 3. Coils L1, L2, R1 and R2 are wound on each of the leg parts 8-1-8-4. The coils R1 and R2 are connected so as to offset the induced voltage against the inclination vibration in Y direction of the armature and to add the induced voltage against the vibration in X direction. The coils L1 and L2 are connected reversely compared with the above.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a so-called moving magnet type pickup cartridge, and particularly to a pickup cartridge that is optimal as a structure using a flat armature that is magnetized in the thickness direction.

Traditionally, this type of pickup cartridge (hereinafter referred to as
The cartridges shown in FIGS. 1 and 2 are known (simply referred to as "cartridges"). The cartridge shown in FIG. 1 has a cantilever 2 with a front needle 1 attached to one end and a flat armature 3 magnetized in the thickness direction extending perpendicularly to the axial direction of the cantilever 2 at the other end. This flat armature 3 is supported in the yoke L so as to be able to vibrate tiltingly in the front and back direction (in the direction of the arrow) about the fulcrum 5, and the flat armature 3 is tilted to one side due to the (the state shown by the imaginary line), the direction of the magnetic flux flowing through the yoke L is switched, and a voltage is generated in the wire ring 6 wound around the yoke f. However, in the configuration shown in FIG. 1, when the flat armature 3 vibrates, the magnetic pole part of the flat armature 3 moves only a little with respect to the yoke 2, and moreover, with respect to the dimension in the thickness direction of the flat armature 3, Since the yoke L facing this is long, as shown in the figure, in addition to the effective magnetic flux φA that interlinks with the wire 6, a large amount of invalid magnetic flux φB that does not interlink with the wire 6 is generated, resulting in poor sensitivity. difficult to obtain.

In contrast, the cartridge shown in FIG.

A yoke l with a nearly figure-8 cross section, whose center = iP1 is
It is arranged so as to face the periphery of the flat armature 3 at an appropriate interval when it is at rest, and when the flat armature 3 oscillates (the state in which it tilts to one side due to vibration is shown by the imaginary line), its periphery is The yoke 70 depends on whether it approaches the front magnetic pole P of yoke 2 or the rear aaPs.
The wire ring 6 is wound around the wire ring 6, and the direction of the magnetic flux flowing through the skin portion is switched, so that a voltage is applied to the wire ring 6. In this way, in the configuration shown in FIG. 2, when the flat armature 3 is tilted, the central magnetic field % P is placed on one of the peripheral magnetic fields.
It approaches t by destroying the magnetic balance, but the change l in the distance between the other magnetic pole and the front or rear magnetic poles p and op3 is small, so it cannot be said that the power generation efficiency is high. .

Furthermore, in the configuration shown in FIGS. 1 and 2 above.

6 wire wheels and this 7-roll yoke! Alternatively, since each of these is configured to detect the vibration b' in one direction independently, for general two-channel stereo use, one for L channel (left channel), and one for R channel (right channel). Two sets, each with the same configuration, are required, and due to the structure of the magnetic abrasive surface, the yoke L
In addition, it is necessary to bend a magnetic material such as permalloy in the thickness direction in the shape of a = character, which may lead to deterioration of the magnetic material. Therefore, these conventional configurations cannot be said to be preferable in terms of yoke farming, ease of assembling the yoke, and variations in molding and customs.

The present invention has been made based on the above circumstances, and aims to provide a cartridge which has a high X-generating efficiency, is particularly electromagnetic, is easy to form, and can be molded into a large volume. The purpose is

Hereinafter, the present invention will be described in detail using examples with reference to FIG. 3 and subsequent figures.

FIG. 3 is a perspective view showing an embodiment of the invention, and FIG. 4 is a front view thereof. In the figure, a cantilever 26 has a front needle 1 attached to one end, a circular plate-shaped flat armature 3 magnetized in the thickness direction is attached to the other end of the cantilever 26, and a cantilever 26 has a north pole facing forward.
The flat armature 3't is mounted so as to extend orthogonally to the axial direction of the flat armature 3't. - (Illustrated Eve) - 2 is supported and configured to be biased to a predetermined position. Furthermore, it has three legs 8-1.8-2.8-3 that are thinner than the flat armature 3 and are on the same plane as the extending plane of the flat armature 3 located on the biasing ring or on a flat hitting surface. A yoke 8 is disposed above the flat armature 3, and this yoke 8
The tip magnetic pole surfaces of both side legs 8-1 and 8-2 are arranged to face the left and right side surfaces of the peripheral edge of the flat armature 3 with an appropriate distance therebetween, and the tip of the center leg 8-3 'a The movable surface faces the upper side surface with an appropriate interval, and each of these legs Fl -1m g -2+8
-3 has wire rings L on both side legs 8-1 and ll-2, respectively.
1 and R1 and the magnetic path 8 without the center leg 8-3t2.
-4. For FI-5, one magnetic path 8-4T/C wire ring,
The wire ring R2 is wound around the other @road 8-5. Said wire ring L1
As will be described later, the induced signal 1 other than the induced signal corresponding to the predetermined tilt vibration of the armature 3 based on the vibration of the positioning needle 1 cancels out and corresponds to the predetermined tilt vibration. The induced signal is added to two square wires, each with the positioning needle 1.
The L channel and R channel signals corresponding to the vibrations of the L channel and R side track are taken out.

Next, the principle of power generation in the above configuration will be explained in detail. That is, from the state shown in FIG. 4), the positioning hand 1 is displaced as shown in FIG. If it is tilted in the Y direction forming an angle of Part 8-
Since the S pole approaches the tip magnetic pole surface of each of the yoke 8, a magnetic flux φ is generated in the yoke 8 as shown in FIG. , φ8 , φ2
, φ3 occurs.

(However, φ0kiφl+φ2+φ3) Therefore, the left leg 1l-IVC-wrapped transportation L1, the center leg s-so
On the other hand, o:aHs -J Itc winding Llf1m L!
In each case, the four I kings shown in the diagram are induced, and these lines sL
If L and L2 are set as L measurement station 1 by looking down so that the induced voltage is applied as shown in the figure, the flat armature 3
Due to the above-mentioned gradient vibration of xx'52b, a voltage proportional to the change in the magnetic flux can be taken out from the L side gland ring. on the other hand,
Voltages of the polarities shown are induced in the six-wire ring R wound around the right leg 8-2 of the yoke 5 and the other magnetic path 8-5 of the center leg 8-3, respectively. However, these Sukhan R1
+ ELz t- As shown in the figure, by drawing a chain line as R side line wheel & so that the two induced pressures are canceled out, R ( In this case, the relationship between the turns ratio of the coils R and R3 is as follows: If the number of turns is N RI and NR, then the voltage induced on the coil R is It is not necessary to set the voltage so as to satisfy the relationship that the voltage induced in the ring R1 is equal to the voltage induced in the ring R1.

In addition, contrary to the above, the flat armature 3 rotates the gravel from the state shown in Fig. 4 to the direction shown in Fig. 6, Y-Y, and makes an angle of 5'' with respect to the hand rotation direction with respect to the base 4 surface. If there is an inclination deviation in the direction of the Approaching the tip of 3,
Magnetic flux φ in the direction shown. ′, φ, ′, φ2′.

φ,' occurs, and in this case, as mentioned above, if the bare 'ta Rs and R1 and Ll are connected, then the linear ring R□,
The voltage induced in R2 is added to the psychogenic voltage, and the voltage induced in L*-Lx is canceled out, and in terms of R side, the axis of the flat armature 30Y-Y' line is A voltage proportional to the change in magnetic flux caused by the gradient vibration is induced, and when the Y-Y' gland is glazed, no voltage is induced in the L-side gland by the vibration. In this case, it goes without saying that the turn ratio of the front 4 L 1 and L2 is set similarly to the turn ratio of the above-mentioned inspection RX and R2.

I have heard that there are many advantages to the cartridge of the above-mentioned structure with such a protruding original fang, but also in Japan. That is, II' as described above: the three legs 8-1 of the S yoke extending over 18 sections of the flat armature 3;
．． 8-2. Thickness of 8-3 1. As shown in the side view in Figure 7, the flat armature is oriented in the direction of the bulge.
Because the thick tongue T and thin V are set, less invalid magnetic flux is generated compared to conventional bookkeeping (for example, Fig. 1).
Even with small displacements of the flat armature 3, a difference in position occurs between the 8 legs of the yoke, resulting in high power generation efficiency. Furthermore, in this case, the interval between the flat armature 3 and the yoke leg portions 8-1.8-2.8-3 can be easily set to be narrower, so that the power generation efficiency can be further improved.

In addition, since the thickness of the flat armature 3 can be made thinner and the outer diameter can be made smaller in order to improve the power generation efficiency, the vibration system can be made into an @1 type, and frequency characteristics and mechanical impedance customization can be improved. 7. Since the configuration does not include a yoke below the flat armature 3 (below the record cover surface), it should be placed on the lower side of the power generator as shown in FIG.
can be made wider, which makes it easier to design the vertical tracking angle β, and it is also easier to shorten the length of the force/tilt lever 2 to make the vibration system more compact. Furthermore, the magnetic path 11-4 of the central leg portion 8-3 of the yoke. By winding it around G-5 and appropriately setting the windings of L2 and R2, the crosstalk value between the L and R channels can be improved and can be arbitrarily selected within a certain light range. It is also possible to set the magnetic path in the yoke as short as possible, and there is no need for bending the yoke, so there is less magnetic loss.In particular, in the bookstore mentioned above, since bending is not required, lamination of the yoke is possible. In other words, it is easy to create a stratified structure,
The frequency characteristics of the magnetic circuit can be easily improved. Also,
Since there is no yoke below the flat armature 3, when attaching and detaching the vibration system, it is possible to attach and detach from below instead of from the front as in the conventional case, which simplifies attachment and detachment of the vibration system, so-called needle replacement. can be converted into ), legs 3-1, 8-2 and 3-3 of yoke 8! Road 3-4゜8-5
Since the spacing between the parts to be wound can be widened, the winding work can be simplified. In addition, conventionally, two-channel stereo cartridges required two sets of yokes, one for the qL channel and one for the R channel, but according to the above structure, only one yoke was needed. This is advantageous in terms of manufacturing the yoke and actually assembling the cartridge, and reduces manufacturing costs. In addition, there are various other effects resulting from the fact that it is small, lightweight, and easy to manufacture.

In addition, in the above-mentioned measurement, three legs /I-1, 8-2,
The yoke 1 having the armature 8-3 is disposed in a direction perpendicular to the direction of the armature 30, which is similar to the boom 1
At the end of the 30th lap, the tips of the three legs are facing each other, and if the three legs are magnetically connected via the two a-way IJ-4, 3-5, then The arrangement is as shown in Fig. 8 as a yoke cylinder with a shape like that shown in Fig. 9.
In the same embodiment, a circular plate-shaped flat armature 3 is used, but a rod-shaped armature 11 shown in FIG. 10 is used, and the armature 11 is Three legs 73-1 in a magnetic plane parallel to the feldspar direction.

12-2. Providing a yoke 12 with 12-3 facing each other
It may be made up of 14 pieces. In this case, the leg 12-1.12
-2. It is preferable that the facing machine surface of 12-3 is longer than the armature 11.

In addition, within the scope of the present invention, the gist of the invention shall not be changed.
It can be implemented with various modifications.

For example, FIG. 11 is a perspective view showing another embodiment of the present invention,
FIG. 12 is a front view thereof. In the figure, a circular plate-shaped flat armature 3 magnetized in the thickness direction is attached to the other end of the cantilever 2, which has the front needle 1 attached to one end, and extends orthogonally to the downward direction of the cantilever 2, with the front section being 8. This flat armature 3 is supported via a suitable dunnage (not shown) in such a way that the flat armature 3 can be swung diagonally using the center in the thickness direction on its central axis as a fulcrum. However, it is configured to stop the planned number one alliance. Furthermore,
Four water legs thinner than the flat armature 3 are placed on a plane that is the same as or parallel to the extending plane of the flat armature 3 located above the diversion ring. A floating yoke 8 is disposed above the flat armature 3, and the magnetic tip 5 surfaces of both legs Hvs-z and 8-2 of the yoke 80 are located on the left and right sides of the circumference of the flat armature 3, respectively. The top magnetic surface of the central leg 13-3. In the parts 8-1, ll-2, 8-3, and ll-4, front wheels and R are wrapped around both side leg parts s-r and 8-2, respectively, and the central leg part 8-3°3- 4 is wrapped with wires Jli L 2 and R2. Said Tsuta L! and R2 and R1 and 1. Based on a hunch of the front needle I, which will be described later. The induced signals other than the induced signal corresponding to I7 are canceled and added to the induced signal corresponding to the predetermined oscillation effect around 1, and the L channel and R channel corresponding to the vibration of the front needle 1 are connected. L-piece 1 to extract the signal
13 rings and R side Akagame 3 and eggplant.

Next, the principle of power generation in the above a configuration will be explained in detail. That is, from the state shown in FIG. 12, the front needle 1 is displaced as shown in FIG. 13, and the flat armature 3 is moved to a position where the axis x-x' in the figure is 8 and 45' with respect to the direction perpendicular to the reference plane (record surface). make an angle? If the tip of the left leg El-1 of the yoke 8 approaches the magnetic pole face flat armature 3ON pressure, the center leg 8-3, 8-4
Since the S coffin approaches the tip magnetic pole surface of each of the right leg portion 8-2, the magnetic flux φ is applied to the yoke 8 as shown in FIG.
. ,φ,.

φ8. φ3 occurs. (However, φ.kiφ, 〒φ2+φko) Therefore, the ``1L='' wrapped around the left measuring part 8-1 and the 9-position NLs, and the ``Roku 1L='' wrapped with the 4-way leg part 8-3VC are shown in the figure.
If the induced voltage is added to R2 as shown in the figure, and if the root of the word ``uni'' is expressed as ``L-side alternation'', then the above X-X'i of the flat armature 3 is
Due to the change in magnetic flux due to the gradient vibration force, a voltage of 1jL can be extracted from the L-side gland. On the other hand, a voltage of one tune fL is induced in each of the t core wire R, which is wound around the right leg 8-2 of the yoke cap, and the series R2, which is wound around the middle J part 8-4. However, as shown in the diagram, these glands R,,R,i
! Let's make it R (III gland R) so that EE cancels out:
A voltage is not induced in the RgI viscera by the gradient vibration force that makes X'i thin. In this case, if the number of turns is NR and NR2 in the relationship between the turns ratio of the coils R8 and R2, then the voltage induced in the coil R3 will be equal to the voltage induced in the coil R:. Needless to say, it is unnecessary to set the relationship so that it satisfies the relationship.

), and in contrast to the above, the flat armature 3 is in the state shown in Fig. 22, and in Fig. 14: If the inclination is eccentric in the direction of forming the middle =, the N yoke of Rihira armature 3 approaches the tip magnet of the stone side leg Mi 8S-2, and the S healing Ir
: Magnetic flux φ approaches the tip magnetic pole surfaces of the left leg portion 8-1 and the center S portions B-3 and 8-4 in the illustrated direction. I,φr.

φ2' and φ3' occur, and in this case, as mentioned above, if the captives R1 and R- and Ll and R2 are M A c, the intestinal ring R,
, R, is added, and the voltage induced in L1+L2 is canceled out.As a result, the voltage induced in R is calculated with Y - Y'a of flat armature 3 as the axis. A voltage proportional to the change in magnetic flux due to the gradient vibration force is induced, and with such a gradient vibration force centered on the Y-Y' line, no voltage is induced in the L@gland theory. In this case, it is 4rJ theory that the turns ratio of Lx and R2 is also set to the same root as the turns ratio of IJ vines R1 and R3 mentioned above.

The cartridge of the above construction, which is suitable for this type of development, has the usual differences in size, size, size, and size, and also in terms of agricultural production. In the above description, the four '' of the yoke L extending around the periphery of the flat armatinia 30! B1 part 8-
The thickness tl of 1p & -2+ 8-3 +3-4 is set to be much thinner than the thickness t of the flat armature 3 which is exposed (in the thickness direction) in the side view shown in Fig. 15. Therefore, compared to the conventional one-piece structure (for example, Fig. 1), there is less occurrence of invalid positioning, and even with a slight construction of the flat armature 3, a position difference occurs between the yokes 8 and 8j. The power generation efficiency is high. Moreover, in this case, due to the construction, the legs 3-1, 8-2, FI-3,
Since it is possible to easily set the distance between the two and ll-4 to be narrower, the power generation efficiency can be further increased. In addition, for better power generation efficiency, the thickness of the flat armature 3 can be made thinner and the outer shape smaller, so the vibration system can be improved! 111, and the frequency layer and mechanical impedance characteristics can be improved. In addition, since the configuration does not include a yoke below the flat armature 3 (accessing the record surface), it is possible to have a wide clearance α between the lower side of the power generator and the record surface, as shown in Fig. 15. It is easy to design the tracking angle β, and it is also easy to reduce the running force/length of the tilter 2 to the length of the vibration system. Further, the central leg portion 8-3 of the yoke.
8-4 and by appropriately setting the number of turns of the nine-wire ring L2zR2, it is possible to obtain a good crosstalk value between the L and R channels, and it can also be arbitrarily selected within a certain range. I can do it. The magnetic path in the yoke can be set short and there is no need to bend the yoke, resulting in less magnetic loss. In particular, since the above structure does not require bending, the yoke portion can be easily laminated, that is, formed into a layered structure, and the frequency characteristics of the magnetic circuit can be easily improved. In addition, since there is no yoke below the flat armature 3, when attaching and detaching the vibration system, it is possible to attach and detach the vibration system by applying downward force instead of attaching and detaching it from the front, which is the conventional method. Needle replacement can be simplified. Mano, legs of yoke 3 3-1.3-2+3-3.8-, J (09$
L, rR, , L2 , R, can be rolled up and the opening of the S part can be done twice, so 11 hours of winding work can be achieved. Also, conventionally,
A 2-channel stereo cartridge requires two sets of yokes, one for the L channel and one for the R channel, but according to the four configurations above, only one set of yokes is required; This is advantageous in manufacturing the cartridge and in assembling the cartridge), and the manufacturing cost can be reduced.

In addition, there are effects of tightness caused by the small size, coarse size, and the fact that the kozo is a spacing wheel.

In addition, in the above example, the thickness of the armature 3 -:(
The four legs 8-1.8-2.
8-3. A yoke having a yoke ll-4 is disposed in a direction perpendicular to the magnetization direction of the armature 3, and the tip of the ylJ portion of the 4 water is opposed to this on the circumference of the armature 3, and the yoke has four legs. As long as the parts are magnetically connected, the yoke 10 may have the shape shown in FIG. 16, for example, or the yoke 10 may have the shape shown in FIG. 17.

By the way, in the same example, a circular plate-shaped flat armature 3 was used, but a rod-shaped armature II was used as shown in Fig. 18, and the direction was set by the length of the armature 1 with respect to this armature z1. Four legs 1 part 12-1.12-2.12-3. .

12-4 may be provided with a separate yoke I2f facing each other. In this case, leg 12-1512-2.12-3
．． It is preferable that the opposing magnetic surface of 12-4 be longer than the armature 1z. The shape of the uninvented armature is not limited to a circular shape, but also a square shape as shown in FIG. 19(a), and a square shape as shown in FIG. 19(b).
It is approximately semicircular as shown in Figure (c), and approximately triangular as shown in Figure (c).
Of course, a substantially convex shape as shown in d) may also be used.

In addition, it can be modified in many ways and performed rituals without changing the gist of the present invention.

As detailed above, the present invention has high power generation efficiency,
Electromagnetic inferior vagina! /c It is excellent, has a simple structure, and can be easily molded to provide two cartridges.

[Brief explanation of drawings]

FIG. 1 is a schematic circuit diagram of an example of a conventional pickup cartridge, FIG. 2 is a circuit diagram of an example of a conventional pickup cartridge, and FIG. 3 is a schematic diagram of an electric circuit diagram of an example of a conventional pickup cartridge. FIG. 4 is a front view of the embodiment, FIGS. 5 and 6 are diagrams for explaining the power generation principle of the embodiment,
Figure 7 shows a side view of the same embodiment. ! 1. Figures 8 to 10 are perspective views illustrating two different embodiments of the present invention, and Figures 11 to 15 are perspective views showing further embodiments of the present invention. In the diagram shown in Figure 11, it is approximately 3y!
A perspective view showing the configuration. Figure 12 is a front view, and Figures 13 to 1.
Figure 5 is a diagram for explaining the principle of power generation, and Figures 16 to 1
FIG. 8 is a diagram showing another embodiment of the armature of the present invention, and FIG. 19 is a diagram showing a modified example of the armature of the present invention. 2... Position needle, 2... Cantilever, 3.11...
A, Chini 7.3 r 9.10112” York,
8-1.3-2. #-3.12-1.12-2゜12-
3 ”'legs, 8-4+3-5m1'!-4+12-5
...Magnetic path or h7A section, Dan...L survey line shoulder, Dan...R
! lll taiwa, L,, Lyu p R1, R2...Naked theory. ] Hyakunin Agent Patent Attorney Reiji Takeshi No changes to the contents of the terrorist matter) O 1 Figure number, 2 Figure 23 off figure 8 figure 1, 9 figure S, 12 figure 13 figure fan] 4 figure figure 15 Old Fang 16 Illustrated Fang] 8 Illustrated Fang 19 [! ] (a) (b) (C) (d
) Procedural amendment June 23, 1988 Michibe Uga, Director General of the Patent Office1, Indication of the case Patent Application No. 118717/19822, Name of the invention Pick-up cartridge 3, Relationship with the person making the amendment Patent application Person (240) Sansui Denki Co., Ltd. 4, Agent No. 17 Mori Building 6, 1-26-5 Toranomon, Minato-ku, Tokyo.
Description subject to amendment Document 1, Title of the invention Pickup cartridge 2, Claims A front needle is attached to one end of a cantilever, and an armature magnetized in the axial direction of this cantilever is attached to the other end, This armature is supported so as to be able to tilt and vibrate and to be biased and stationary in one position, and two legs are opposed to the upper 1/4 peripheral side surface of the armature in this biased stationary position, and 1/4 peripheral side surfaces on both left and right sides. Each has two legs facing each other, and a yoke is provided in which these four legs are connected. A wire ring is wound around each of the two legs, and these wire rings are wound around the front needle. The wires are connected so that the induced signals other than the induced signals corresponding to the predetermined tilt vibration of the armature caused by the vibration applied to the armature are canceled out, and the induced signals corresponding to the predetermined tilt vibration are added, and the wires are connected to the front needle. A pickup cartridge characterized in that a signal corresponding to the tilted vibration of the armature is obtained by the applied vibration. 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to the structure of a so-called moving magnet type pickup cartridge, and particularly to a pickup cartridge that is optimal as a structure using a flat armature magnetized in the thickness direction. . [Prior Art] Conventionally, this type of pickup cartridge (hereinafter referred to as
As a cartridge (simply referred to as a "cartridge"), those shown in FIGS. 1O and 11 are known. The cartridge shown in FIG. 10 has a cantilever 2 with a front needle l attached to one end and a flat armature 3 magnetized in the thickness direction extending perpendicularly to the axial direction of the cantilever 2 at the other end. Take this flat armature 3
is supported in the yoke 4 so as to be able to tilt and vibrate in the front-rear direction (in the direction of arrow A) about the fulcrum 5, and when the flat armature 3 tilts (the state in which it is tilted in one direction due to vibration is shown by the imaginary line), the yoke The direction of the magnetic flux flowing through the yoke 4 is switched, and a voltage is induced in the coil 6 wound around the yoke 4. In the configuration shown in FIG. 10, the magnetic pole part of the flat armature 3 moves only a small amount, and the dimension of the yoke 4 facing it is long compared to the dimension of the magnetized thickness direction. In addition to the effective magnetic flux φA that interlinks with the wire 6, a large amount of invalid magnetic flux φB that does not interlink with the wire 6 is generated, making it difficult to obtain good sensitivity. On the other hand, the cartridge shown in FIG. 11 has a cross section approximately E.
The letter-shaped yoke 7 is arranged so that its central magnetic pole P1 faces the peripheral edge of the flat armature 3 at rest with an appropriate interval, and the tilted vibration of the flat armature 3 (a hypothetical state in which the tilt is shifted to one side due to vibration) is performed. ), the direction of the magnetic flux flowing through the part of the yoke 7 around which the wire ring 6 is wound is switched depending on whether the peripheral edge approaches the front magnetic pole P2 or the rear magnetic pole P3 of the yoke 7, and the voltage is applied to the wire ring 6. It is designed to induce In the configuration shown in FIG. 11, when the flat armature 3 tilts, one of the magnetic poles on its periphery is shifted to the central magnetic pole P.
However, since the amount of change in the distance that the other magnetic pole approaches and separates from the front or rear magnetic poles P2 and P3 is small, it cannot be said that the power generation efficiency is high. Furthermore, in the configurations shown in FIGS. 10 and 11 above, vibrations in one direction are detected independently in the wire ring 6 and the yoke 4 or 7 around which it is wound, so the general two For channel stereo use, one set of the same configuration is required for the L channel (left channel) and the R channel (right channel), respectively.
Moreover, due to the structure of the magnetic pole surfaces, the yokes 4 and 7 must be made of a magnetic material such as permalloy and bent into a U-shape in the thickness direction, which may lead to deterioration of magnetic properties. Therefore, these conventional configurations are not preferable in terms of ease of manufacturing the yoke, ease of assembling the yoke, and variations in manufacturing and characteristics. [Problems to be solved by the invention] In the conventional configurations as shown in FIGS. 10 and 11 above,
There were many problems, such as it was difficult to increase sensitivity and power generation efficiency, magnetic properties tended to deteriorate, yokes were difficult to assemble during manufacturing, and characteristics tended to vary. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve these problems and provide a cartridge that has high power generation efficiency, excellent electromagnetic characteristics, has a simple structure, and can be easily manufactured. [Means and effects for solving the problem] The cartridge according to the present invention has a positioning needle attached to one end of the cantilever, and an armature magnetized in the axial direction of the cantilever attached to the other end. , supports this armature so as to be able to tilt and vibrate and to be biased and stationary in one position, two legs facing the sides of the upper 1/4 periphery of the armature in this energized and stationary position, and 1/4 periphery on both left and right sides of the armature. A yoke is provided which has two legs facing each other on each side and connects these four legs, and a coil is wound around each of the two legs, and these coils are connected to the above-mentioned needle. The wires are connected so that the induced signals other than the induced signals corresponding to the predetermined tilting vibration of the armature caused by the vibrations applied to the armature are canceled out, and the induced signals corresponding to the predetermined tilted vibration are added, and the wires are applied to the position needle. The present invention is characterized in that a signal corresponding to the tilting vibration of the armature described in (1) is obtained by the vibration generated. [Embodiment] FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a front view thereof. In the figure, a circular plate-shaped flat armature 3 magnetized in the thickness direction is attached to the other end of a cantilever 2 with a positioning needle 1 attached to one end, with the front being the north pole and extending perpendicularly to the axial direction of the cantilever 2. This flat armature 3 is supported via a suitable damper (not shown) so that it can vibrate obliquely with the center in the thickness direction on its central axis as a fulcrum. It is configured to be biased and stationary in position. Furthermore, four legs 8-1.8-2 which are thinner than the flat armature 3 are placed on a plane that is the same as or parallel to the plane in which the flat armature 3 in this biased rest position extends.
．． A yoke 8 having a diameter of 8-3 and 8-4 is disposed above the flat armature 3, and the tip magnetic pole surfaces of both side legs 8-1 and 8-2 of this yoke 8 are located at the periphery of the flat armature 3, respectively. ′□ Facing the left and right sides with appropriate spacing □
In addition, the tip magnetic pole surfaces of the central leg portions 8-3, 8-4 are arranged to face the left and right upper side surfaces with an appropriate distance therebetween, and each of these leg portions 8-1, 8- 2.8-3.8
-4, the wire rings L1 and R1 are wound around both side legs 8-1 and 8-2, respectively, and the center leg 8-3 < 8-
4 is wound with wire rings L2 and R2. Top □Register ring L
1 and R2 and R1 and R2 are respectively at the rear □□ As mentioned above, armature 3' is based on the vibration of the positioning needle l.
An induced signal other than the induced signal corresponding to a given tilt vibration of □
The signals are connected so that they cancel each other out and the induced signals corresponding to the predetermined tilt vibrations are added, and the vibrations of the positioning needle 1 are respectively 1; l: *
et: L f + , 1. tb and d R+
+ > -f-)Lt (7) (@q: L side line ring to be taken out and R side line ring R. □Next, the principle of power generation in the above configuration will be explained in detail. That is, from the state shown in Fig. 2 , as shown in Fig. 3, the front needle 1 is displaced and the flat armature 3 is rotated at an angle of 45° with respect to the direction perpendicular to the reference plane (record surface), with the axis of the X-X= line shown in the figure.
If it is tilted in the Y' direction forming an angle of
The N poles of the center leg 8-3.8-4 and the right leg 8
Since the S pole approaches the tip magnetic pole surface of each of -2,
As shown in FIG. 3, magnetic fluxes φ0, φ1, φ2 are applied to the yoke 8.
, φ3 (however, φ0−φl+φ2+φ3). Therefore, voltages of the polarities shown are induced in the wire L1 wound around the left leg 8-1 and the wire L2 wound around the center leg 8-3, respectively, causing these wires L1 and Ll to move as shown in the figure. If the wires are connected so that the above-mentioned induced voltage is added to the L-side wire ring, a voltage proportional to the change in magnetic flux due to the tilted vibration of the flat armature 8 centered on the X-x- line will be generated from the L-side wire ring. It can be taken out. On the other hand, the right leg 8-2 of the yoke 8
The wire ring R1 wound around the center leg portion 8-4 and the wire ring R wound around the central leg portion 8-4
2, or by connecting these wire wheels R1 and R2 as shown in the figure so that the above-mentioned induced voltages are canceled out as the R side wire ring R, the above-mentioned polarity of the flat armature 3 can be induced. No voltage is induced in the R lateral line R by the tilt vibration about the X--X line. In this case, the relationship between the turns ratios of 1lR1 and R2 satisfies the relationship such that the voltage induced in the coil R1 is equal to the voltage induced in the coil R2, if the respective numbers of turns are NRI and NR2. Needless to say, set the settings accordingly. In addition, contrary to the above, the flat armature 3 is tilted in the X' direction from the state shown in FIG. If it is deflected, the N pole of the flat armature 3 approaches the tip magnetic pole surface of the right leg 8-2 of the yoke 8, and the S pole approaches the tip magnetic pole surface of the right leg 8-1 of the yoke 8.
magnetic fluxes φO', φ1', φ2-1φ3' are generated in the directions shown near the tip magnetic pole surface of the central leg 8-3, 8-4, and in this case, as described above, the wire rings R1, R2 and When Ll and Ll are connected, the voltages induced in the coils R1 and R2 are added, and the voltages induced in the coils LL and Ll are canceled out, and as a result, the R side coil R has a flat surface. A voltage proportional to the change in magnetic flux due to the tilt vibration of the armature 3 centered around the Y-Y- line is induced, and with such tilt vibration centered around the Y-Y- line, a voltage is induced in the L side ring. Not done. In this case, the turns ratio of the wires L1 and Ll is also the same as the above-mentioned wires R1 and R.
Of course, the turn ratio is set similarly to the turn ratio of 2. The cartridge constructed as described above based on such a power generation principle has various advantages in terms of performance and manufacturing. That is, in the above description, the four legs 8-1, 8-2, .
8-3. Since the thickness tl of 8-4 is set thinner than the thickness t2 of the flat armature 3 which is magnetized in the thickness direction as shown in the side view shown in FIG. For example, compared to FIG. 10), less reactive magnetic flux is generated, and even a slight displacement of the flat armature 3 generates a magnetic potential difference between the 8 legs of the yoke, resulting in high power generation efficiency. Moreover, in this case, the spacing between the flat armature 3 and the legs 8-1.8-2.8-3.8-4 of the yoke 8 can be easily set to be narrower due to the structure, so power generation efficiency can be further improved. . Moreover, since the power generation efficiency is high, the thickness of the flat armature 3 can be made thinner and the outer shape can be made smaller, so that the weight of the vibration system can be reduced and the frequency characteristics and mechanical impedance characteristics can be improved. In addition, since the configuration does not include a yoke below the flat armature 3 (on the record surface side), the distance α between the lower side of the power generator and the record surface can be widened as shown in FIG. 5, and therefore the vertical tracking angle It is easy to design β, and it is also easy to reduce the weight of the vibration system by shortening the length of the cantilever 2. Furthermore, by appropriately setting the number of turns of the coils L2 and R2 wound around the central leg portion 8-3, 8-4 of the yoke 8, it is possible to improve the value of crosstalk between the L and R channels. Moreover, it can be arbitrarily selected within a certain range. The magnetic path in the yoke 8 can be set short, and there is no need to bend the yoke.
Low magnetic loss. In particular, since bending is not required when the above (I) is formed, lamination of the yoke portion, that is, formation of a layered structure, can be easily performed, and the frequency characteristics of the magnetic circuit can be easily improved. Since there are no holes, when attaching and detaching the vibration system, instead of attaching and detaching from the front as in the past, it is possible to attach and detach from below, which simplifies attachment and detachment of the vibration system, so-called needle exchange.In addition, the legs of the yoke 8 Part 8-1.8-2.8-3.8
Since the intervals between the portions on which the -4 wire rings Ll, R1, R2, and R2 are wound can be widened, the winding work can be simplified. In addition, conventionally, a two-channel stereo cartridge required a total of 2 yokes, one for the R channel and one for the R channel, but with the above configuration, only one yoke 8 is required. This is advantageous in manufacturing the yoke 8 and assembling the cartridge, and can reduce manufacturing costs. In addition, there are various effects resulting from the small size, light weight, simple structure, etc. In the above embodiment, the four legs 8-1 and 8-2 are thinner than the armature 3 (thickness and magnetization direction dimension).
．． A yoke 8 having a yoke 8-3.8-4 is disposed in a direction perpendicular to the magnetization direction of the armature 3, with the tips of the four legs facing the periphery of the armature 3,
As long as the legs of the book are connected magnetically, for example, the sixth
The yoke 9 may have a shape as shown in the figure, or the yoke lO may have a shape as shown in FIG. 7. In addition, in the same embodiment, a circular plate-shaped flat armature 3 was used, but as shown in FIG. Four legs 12-
1.12-2.12-3 yoke 12 facing each other may be provided. In this case, the leg 12
-1.12-2.12-3.12-4 is preferably longer than the armature 11. Further, the shape of the armature of the present invention is not limited to a circular shape, but is also square as shown in FIG. 9(a), approximately semicircular as shown in FIG.
Of course, it may be approximately triangular as shown in ), or approximately convex as shown in FIG. 2(d). In addition, the present invention can be implemented with various modifications without changing the gist thereof. [Effects of the Invention] According to the present invention, it is possible to provide a cartridge with high power generation efficiency, excellent electromagnetic structure, simple structure, and easy manufacture. 4. Brief description of the drawings Fig. 1 is a perspective view showing a schematic configuration of an embodiment of the present invention, Fig. 2 is a front view of the embodiment, and Figs. 3 and 4 show the power generation principle of the embodiment. FIG. 5 is a schematic configuration diagram showing a side view of the same embodiment, and FIGS. 6 to 8 are schematic diagrams of different embodiments of the present invention. Cantilever, 3,11 armature, 8. 9. 10.
12...Yoke, 8-1, 8-2°8-3. 8-
4.12-1.12-2.12-3.12-4...Leg, L...L side track wheel, R...R side track wheel, LL, R2
, R1°R2... Line wheel. Applicant's agent Patent attorney Takehiko Suzue's drawings! F (within ai - no change) Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 (a) (b) Figure 10 Procedure Ne city official book (method) Showa Chi 1.1 and 2 were also Commissioner of the Patent Office Black 1) Mr. Akio 1, Indication of the case Patent Application No. 118717/1982 2, Name of the invention Pick-up cartridge 3, Person making the amendment Relationship with the case Patent applicant ( 240) Sansui Denki Co., Ltd. 4, Agent

Claims (1)

[Claims] A tone needle is attached to one end of the cantilever, and an armature magnetized in the axial direction of the cantilever is attached to the other end, and this armature is supported so as to be able to tilt and vibrate and to be biased and stationary at one position, The armature in the biased stationary position has two legs facing the upper 1/4 circumferential side and two legs facing each of the left and right 1/4 circumferential sides, and these four legs A wire ring is wound around each of the two legs, and these wire rings are used to generate an induced signal other than the induced signal corresponding to the predetermined tilt vibration of the armature due to the vibration given to the tone needle. The wires are connected so that the induced signals cancel each other out, and the induced signals corresponding to the predetermined tilted vibration are added, so that a signal corresponding to the tilted vibration of the armature is obtained by the vibration given to the tone needle. pickup cartridge.