JPS58186295A - Stylus constituent of pickup cartridge - Google Patents

Abstract

PURPOSE:To attain sure mounting to a cartridge main body with a simple operation, by taking the mounting of a stylus constituent as a spring action construction. CONSTITUTION:A seat 34 of a knob member 22 is inserted to a recess 16 formed at the inside from a window 6 of the cartridge main body 1 and a hook 38 is retained to a retain bearing 17. In turning the knob member 22 clockwise taking a hook 38 as a fulcrum forcedly, a projection 40 formed on a tongue 39 contacts a retain stepped part 5 being a front wall 4 of a shield case 3, overrides the retain stepped part 5 with the spring action of the tongue 39 and is coupled elastically with the step 5. Then, both side walls 32, 32 of the knob member 22 are fitted so as to grip both sides of the shield case 3. Then, the stylus 2 is mounted to the cartridge main body 1 lightly and tightly with the spring action of the toung 39 in turning the knob member 22 taking the hook 38 as the fulcrum.

Description

[Detailed Description of the Invention] This invention provides a sound groove jF recorded on a record disc.
There is one related to a side structure for a pickup cartridge that generates M.

Electromagnetic type cartridges such as the ringing magnet type and the moving iron piece type are equipped with a built-in electromagnetic transducer to facilitate needle replacement.
-The needle structure can be attached to the l/1j main body using the detachable ijj function. In addition, recently, an electrodynamic type cartridge containing a single-acting coil has been proposed in which the needle can be replaced with the same simple operation as the electromagnetic type. In the case of a side structure having a pair of γ-mer y-nias oriented in the shape of a cantilever and mounted on the cartridge body from a direction perpendicular to the axis of the cantilever, It is provided with a frictional engagement surface that joins, and is configured to be held on the cartridge main body side mainly by the frictional engagement force of the frictional engagement surface. However, according to this method, there is a risk that the frictional engagement may decrease with repeated use, and if the cartridge is to be made smaller, the design requires a larger friction that can sufficiently hold the needle structure. Since an engaging surface could not be obtained, it was difficult to apply this method as is.

Previously, the purpose of this invention was to
1 L, Vitta γ Sofno J- is equipped with a link mechanism that allows for secure installation with simple operation.
An object of the present invention is to provide a needle structure for Torisi.

In the following, the present invention will be described in detail with reference to embodiments shown in the accompanying drawings.

FIG. 1 illustrates an embodiment in which the present invention is applied to a movable magnet type cartridge. That is, this pickup cartridge includes a Tsunonitrilan main body 1 containing an electromagnetic transducer, and a vibration string that is removably attached to the cartridge main body 1 and that absorbs the mechanical vibrations of the 1° i-groove modulation wall force of the record. The needle structure 2 includes:

The main body 1 of the needle 7 has a needle case 3 consisting of a horizontally long box-shaped body with an open rear end surface, and the needle structure 2 is mounted on the front wall 4 of the case 3, which is placed on the left side of the drawing. A locking step 5 formed in a mountain shape for locking is provided, and the needle structure 2 is fitted onto the bottom wall m1 side of the one-shield base 3. A window 6 is formed for receiving. The electromagnetic converter should be placed in the clearance 0 house 1 that opens toward the window 6 mentioned above! two pairs of magnetic pole huffs, 8 and 9,1, forming two independent actuation cathodes;
0 (Fig. 2 radiation heat). In this example,
The magnetic poles B 7 , 9 on the one hand and the magnetic pole pieces 8 , 10 on the other hand are combined with each other by means of a cylinder member 11 made of synthetic resin; It is formed into a bifurcated shape so as to face the magnetic pole piece 7.9. A coil 13 is wound around the cylinder member 11 in relation to the yoke height IS of each magnetic pole piece, and this coil 13 is connected to a solinter through a wire (not shown) drawn out from the winding start and winding ends. It is electrically connected to terminal bins 14, 14 installed in the moon 11. In addition, in the case of a stereo cartolison, two pairs of magnetic pole pieces 7, 8 and 9,
Two coils will be provided in association with each magnetic circuit including 10, but in FIG. The cylinder member 11 , :] The coil 3 and the terminal bin 14 are connected to a synthetic resin flock 15 ((l), which is formed into a shape that conducts electricity inside the coil 3 and hardens.
Both synthetic resin flocks 15L are inserted into the root case 3. In that case, the synthetic resin flock 15 is provided with a recess 16 that communicates with the window 6 described above, and the rear wall of the four parts I6 and the inner wall of the window 6, i.e., the bottom wall of the root case 3. A locking receiving portion 17 for holding the side structure 2 is formed by the inner surface.

The needle structure 2 according to the present invention holds the stylus assembly free 21 constituting the vibration system and the stylus assembly tree 21, and also attaches the stylus assembly 21 to the cartridge main body 1.
It consists of a tab bar 22 for removably attaching it to the.

The stylus assembly free 21 includes a nonon-f-lever 24 equipped with a needle tip 23 at the tip, and a rear end of this cantilever 21.
4. Illustrated on a virtual vertical plane containing the axis of the horn/narrow horn so as to correspond to each of the two sound groove modulation walls of the screen J-1.
It includes one pair of arches/tubes γ25 symmetrically oriented with a chromaticity of 5 degrees. In this case, only one armature γ 25 is shown in FIG. 1 for convenience. In this embodiment, the lever 24 is made of an injection molded body of conductive synthetic resin mixed with carphone powder, etc. It is attached to the retroflexed side of the cantilene \-24 so that the proximal end is sometimes buried. The armature 25ζ is constructed from a cylindrical net magnetized in the longitudinal direction. This stylus assembly free 21 is integrally attached to the rear end of the Cannagino
It is first attached to the No. 7 menher 22 via a mounting loft 27 fitted over the No. 7 menher.

During this installation, a 4V lick-shaped braking member 28 made of a viscoelastic comb material is interposed between the cannazino\-24 and the nofmenha-22.

Referring also to Figure 3, Nofumen/<-22(9j
1 Bottom wall: 3 (,, 1-1 A pair of side walls 32 and 32, which are formed so as to rise from both side edges of this bottom wall 31, and a front wall 33 connected between those edges. A squill assembly 21 is fixed to the center portion of the bottom wall 31, and functions as a guide member to be removed within the window when the nof assembly 22 is attached to the cartridge body l. There is also a pedestal 31 erected.

That is, this pedestal 34 (4L: 35 which is installed in the horizontal direction for the 1, 10 side 27) and the screw hole 36 which is opened perpendicularly to this hole 35 from below. The mounting rod 1-27 is tightened in the hole 5 by a tightening hole 37 provided in the screw hole 36,
In this way, the stylus assembly 21 is firmly attached to the nofmeter 22. Further, a hook member 38 is integrally connected to the rear of the base 34 and is formed to fit into the recess 16 of the main body 1 of the cart 1 described above and cooperate with the locking receiving part 17. 1. The side walls 32, 32 are formed to engage with both side walls of the shield case 3 with an appropriate frictional force. front wall 4
A live B:39 formed so as to be elastically deformable is connected to the central portion thereof. And this tongue)'+390) At the F end,
A protrusion 10 is formed which extends over the engagement step 5 provided on the belt case 3 side and is engaged with it. Unlike this embodiment, a concave portion may be provided at the lower end of the tongue piece 39, and the tongue piece 39 may elastically fit the concave portion into the engagement step portion 5. It is also possible to provide the above-described four parts that cooperate with the protrusion 1 in the part where the stepped part 5 is provided.
A curtain plate 11 is provided to cover the front of the vehicle 9, and a company mark, a cartorisson west marker, etc. are attached to this curtain plate 41.

With the configuration described above, the hook structure 2 is attached to the cartridge body as follows.
First, place the pedestal 34 of Nosomenohar 22 on the cart.
' / Insert the hook 38 into the lock receiving part 17 by inserting it into the four parts 16 formed inside the main body 1 through the window (). Then, using the hook 38 as a fulcrum, the nofume/bar 2 is
2 forcibly rotated clockwise in Figure 1, the tongue piece 39
The protrusion 40 (1↑, /) formed on the front wall 4 of the root case 3 contacts the engagement step 5, causing the tongue 39 to slip.
Due to the action of the locking mechanism, it passes over the retaining step 5 and engages elastically therein. Also, along with this, /
Both side walls 32, 32 of the fumenha 22 are attached so as to invite both sides of the shield case 3. In this way, the needle assembly 2 is securely attached to the car+-IJ joint body 1, and each of the armatures 25 is placed in its proper position within the corresponding actuation cap. on the other hand,
To remove the needle structure 2 from the car 1-ridge main body l, apply a force to the front wall 39 of the knife 22 in the counterclockwise direction in FIG. Forcibly disengage the engaged state with the part 5. In a case where the force is stored in a housing made of synthetic resin, it is preferable to form an engaging stepped part on the front wall of the housing. It may also be a movable ml coil, in which case the car 1 - IJ body 1
A macnet for forming a magnetic cat between each magnetic pole piece is provided within the magnetic pole piece.

As is clear from the description of the above-mentioned embodiments, according to the present invention, when the nofumenohar 22 is rotated using the knock 38 as a fulcrum, the link γ-kunyon of the tongue piece 39,
The needle structure 2 can be easily moved against the cartridge body 1, and
It can be installed in one go. In that case, there is almost no deterioration in holding power due to repeated use unlike in the past, and
The user can feel that the needle structure 2 has been definitely disassembled due to the Snoring Ackunyon that has collapsed.
It is extremely convenient in terms of operation.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the present invention, with the cartridge main body L nozzle/bar separated; Fig. 2 is a perspective view of the cartridge main body viewed from below; In the figure, %1(, is the force). %1 is the force. 2 is the needle structure, 3 is the bolt case, 5 is the retaining step, 6 is the window. /, 17 is a locking receiver, 21 is a squirrel assembly tree, 22 is a nofmenher, 24 is a can J lever, 25 is an armature, 26
27 is the mounting lot, 28 is the braking member, 34 is the pedestal, 38Lf notch, 39 is the tongue, and 4o is the protrusion.

Claims (1)

[Scope of Claims] The front wall has a locking step extending laterally, and the bottom wall is open. a casing in which a window is perforated, and an electromagnetic transducer provided in the cane, two pairs of actuating keys 1' forming two actuating keys 1' horns in a clearance open towards said window. The device includes a magnetic pole and a locking receiving portion formed on an inner wall portion on the rear end side in relation to the window. -ψ: A pair of armatures fixed to the other end of the cantilever 7'-mus with a needle tip at M, which corresponds to the modulation wall of the sound groove of a record. a wire fixed to the other end of the cantilever arm and extending therefrom, and a mounting bar fixed to the other end; A nofmenher having a hole for receiving a metsuba; a damper made of an elastic material disposed between the pair of armatures and the nofmenha; and the locking receiving portion! : a first hook member formed at the rear end of the nof member to cooperate with each other; and a tongue piece formed on the nof member for elastic deformation so as to face the front wall of the casing. , and a protrusion acting on the locking stepped portion at its end, and the nofmenher is forcibly rotated about the hook member that cooperates with the locking receiving portion as a fulcrum. Move21. f, ; The front d is attached to the casing through elastic engagement between the protrusion of the tongue piece and the locking step;
A needle assembly for a pick-up cartridge, characterized in that the pair of armatures are properly disposed in relation to each of the actuation keys and knobs.