JPS59198501A - Pickup device for playing record disc - Google Patents

Abstract

PURPOSE:To trace accurately a sound groove of a record disc by providing a holding arm freely bent and deformed holding a pickup cartridge so as to allow the pickup cartridge to move freely along a guide lever. CONSTITUTION:The 1st and 2nd arms 20, 21 are connected freely bent and deformed via a bearing 22. When a reproducing stylus 4b of a cartridge main body 4a is positioned and descended onto an outer circumferential groove of the record disc D by taking a finger bar 18 while a record disc D is rotated, the pickup cartridge 4 brings a running bearing 3 in rolling movement on a guide bar 2 and moves straightward toward the center of the record disc D while bending and deforming an arm 5. Although an angle between the 1st arm 20 and the 2nd arm 21 of the arm 5 is changed and the horizontal component of force of the arm 5 exerted to the pickup cartridge 4 is increased gradually toward the inner circumference of the record disc, the tip of the guide bar 2 is tilted slightly upward, allowing to attain uniform trace.

Description

[Detailed Description of the Invention] The present invention relates to a pickup device for playing records,
More specifically, the present invention relates to a linear tracking type pickup device that can be easily attached to an existing record player.

Pickup devices used in record players can be broadly classified into two types, one-arm type and the other type, linear tracking arm type. In this case, compared to the offset angle A mentioned above, the latter tracking arm has almost no problems such as inside hoses, and the effect of improving the acoustic characteristics can be obtained.
Conventional linear tracking arms have problems in that the electrical and mechanical mechanisms for linearly moving the arm are complicated, and the mounting position and space are restricted. Further, since the movement of the pickup car 1 to the recorder, which are moved by the rotation of the record, is tracked and controlled by the base of the arm, it is extremely difficult to make the offset angle zero at the stylus tip position.

The present invention was made in view of the above circumstances, and the gist thereof is to provide a pickup cartridge having a guide bar held substantially horizontally above a turntable, and a traveling means for rolling on the guide bar. The pickup car 1 is composed of a bendable and deformable holding arm that holds the pickup cartridge so that the ridge can move freely along the guide lever, and can be easily attached to existing record players. It is an object of the present invention to provide a linear racking arm type pickup device which can be mounted on a record disc and which can accurately track the sound of a record.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a front view of the pickup device of this invention.

FIG. 2 is a plan view of the pickup device 1, and FIG. 3 is a perspective view of the pickup device 1 in use. . That is, this pickup device 1 has a guide bar 2 that is held substantially horizontally above the turntable B, and a pick amplifier car 1 that has a ridge 4 that has a bearing 3 as a traveling means that rolls on the guide bar 2. and a bendable and deformable arm 1.5 that holds the pickup car 1-ridge 4 so that it can freely move along the guide bar 2.

In this embodiment, the guide bar 2 includes a base member that includes a base 6 that is screwed, for example, to the turn T-pull board C, and a fixing plate 8 that is fixed to the base 6 via support legs 7. It is rotatably mounted in the vertical direction via a bearing '10 on a support column 9 standing upright. It is also tilted slightly upwards with respect to the virtual tree line.

A rope I2 like a hanging string extending from the upper part of the support column 11 erected on the fixed Fj, 8 is tightly attached to its tip. That is, the cable 12 is stretched between the tip of the guide bar 2 and the upper end of the support column 11, so that the guide bar 2 is held substantially horizontally above the turntable B.

In this case, a spring 13 for adjusting needle pressure and an adjustment screw 14 such as a cap screw for connecting this spring 13 to the support 11 are connected to the support side of the cable 12, and the adjustment screw I4 is connected to the support support. It is screwed into a screw hole 11a provided in 11, and the stylus pressure can be adjusted by adjusting the screwing amount. Note that the spring 13 can also be provided on the tip side of the guide bar 2.

On the other hand, the pickup cartridge 4 includes a head shell 15 having a running bearing 3 that rolls on the guide bar 2, and a car 1 mounted on the head shell 15.
- A ridge main body 4a, and weights 1G for balance adjustment are provided at both ends of the herad shell 15 in the moving direction, respectively.

17 is adjustable with screws 16a and 17b. In this case, due to the relationship between the linear velocity when the pickup car 1 to the rod 4 are mounted on the guide bar 2 and move toward the inner periphery of the record (not shown), the spatula 1 and the shell 1 are
5 may be tilted counterclockwise in Figure 2,
It is preferable that the balance adjustment weight 17 on the proximal end is at least twice as heavy as the balance adjustment weight 1G on the distal end. The running bearing 3 is rotatably supported by a part of a finger bar 18 that projects horizontally from the head shell 5.

The arm 5 also has a first end 1120 pivotably mounted to the top of the support leg 7 via a bearing 19 so as to be rotatable in the vertical direction.

is pivotably mounted to the free end of the arm 20 to be rotatable in a vertical direction;
It also includes a second arm 21 whose other end is pivotably mounted on the upper surface of the head shell 15 so as to be rotatable in the vertical direction. That is, the first and second arms 20.21 are
They are connected through a bearing 22 so that they can be bent and deformed, so that the traveling bearing 3 of the bitter up car 1-ridge 4 moves on the guide bar 2, and the car 1
- The playback button 4b of the ridge main body 4a is designed to trace one sound groove of a record. In this case, the pink up car 1-ridge 4 moves toward the inner circumference of the record disc, and along with this, the first and second arms 20.2
When the angle 1 opens, the horizontal force received from the arm 5 increases, so the pickup cartridge 4 tends to race faster toward the inner circumference of the record. The tip of the bar 2 is provided with an upwardly inclined angle O. In this way, the tracing force of the pickup cartridge 4 is controlled and the displacement of the guide bar 2 is kept constant. In addition, the upper surface of the tip of the guide bar 2 may be coated with a material 2a having high friction (see Fig. 4), or the tip of the guide bar 2 may be coated with a material that gradually increases the contact area with the running bearing 3. A widened portion 2b may be formed (see FIG. 5), which allows better control of the tracing force and better control of the chi 1-bar 2. The displacement of can be kept constant.

Incidentally, reference numeral 23 denotes a holding portion attached to the support column 11, and is formed so as to be able to hold the guide bar 2 in the rest 1-state. Further, 24 is a fixing screw for adjusting the position of the support leg 7, and 25 is a terminal board having a pin jack, which connects the car to the car via a vinyl-covered wire 2G.
- It is connected to the main body 4a.

To install this pickup device 1, first remove the dust cover (not shown) of the record player A, and attach it to the turntable board C at an appropriate location with screws or double-sided adhesive tape. Place the axial tip of bar 2 on turntable B.
Complete the installation by aligning it with the center spin 1-rule 13'.

Next, the operation mode of this pink-up device 1 will be explained. When the record disc is rotating, the playback needle 4b of the cartridge body 4a is positioned in the outer circumferential groove of the record disc using the finger hook bar 18. When you lower it,
The big asophonist cartridge 4 moves linearly toward the center of the record disc while rolling the running bearing 3 along the guide bar 2 and bending the arm 5. At this time, the angle formed by the first arm 20 and the second arm 21 in the arm 5 changes, and the horizontal component force of the arm 5 applied to the pickup cartridge 4 gradually increases along the inner circumference of the record. ,
As mentioned above, by making the tip of the guide bar 2 slightly tilted upward or by coating it with material 2a that has high frictional resistance, the negative effects of this can be eliminated and a uniform lace can be achieved. can be done.

51j,'' - Example ('lJ,, J-no-ga, r doper 2 is used to move and hold the pickup car 1-ridge 4, but two similar guide bars are arranged in parallel. established,
If the running bearing 3 of the pickup cartridge 4 is removably placed on each guide bar, the pickup device can be made even more stable.

As is clear from the description of the embodiments described above, according to the present invention, the mechanism is much simpler than that of the conventional linear tracking arm, and it is possible to accurately trace the existing linear tracking arm. To provide a linear to ranking type pickup device which can be easily attached to a record player.

[Brief explanation of the drawing]

FIG. 1 is a front view of the pickup device of this invention, FIG. 2 is a plan view thereof, FIG. 3 is a perspective view showing the pickup device of this invention in use, and FIGS. 4 and 5 are guides in this invention. FIG. 7 is a cross-sectional view and a plan view of a main part showing another embodiment of the bar. In the figure, 2 is a kite bar, 2a is 4, 4 with high frictional resistance
2b is the expansion part, 3 is the running bearing link, 4 is the pickup car 1-ridge, 4a is the car 1-ridge body, 4b
1 is a regenerating needle, 5 is an arm, 6 is a base, 7 is a supporting leg, 11 is a column, 11. a is a screw hole, 12 is a cable, 13 is a spring, 14 is an adjustment gz screw, 15 is a shell, 16
, 1.7 is a balance adjustment weight, 20 is a first arm, 21 is a second arm, and 22 is a bearing. Patent applicant: Audio Technica Co., Ltd. Agent: Patent attorney: Takuya Ohara

Claims (8)

[Claims] (1) A guide bar held substantially horizontally above a turntable, and a pickup cartridge having a traveling means that rolls on the guide bar, so that the pickup cartridge can freely move along the guide bar. What is claimed is: 1. A pickup device for playing a record, comprising a holding arm that can be bent and deformed to hold the pickup cartridge. (2) The guide bar is rotatably pivoted in a vertical direction to a base installed on the turntable, and
(7) L/cord according to claim 1, characterized in that the L/cord is held in a substantially horizontal state by a cable stretched between it and a column erected on the base. Pink-up device for performance. (3) The e-pickup device for playing records according to claim 2, wherein a spring and an adjustment screw for adjusting four pressures of the pickup cartridge are connected to the cable. (4) A pickup device for playing a record according to claim 1, wherein the tip of the guide bar is slightly inclined upward. (5) The pickup device for playing a record according to claim 1, wherein the top surface of the tip of the guide bar is coated with a member having high frictional resistance. (6) A pickup device for playing a record according to claim 1, wherein the tip of the guide bar is widened so that the area of contact with the traveling means of the pickup cartridge is rounded. . (7) A pickup device for playing a record according to claim 1, wherein balance adjusting weights are adjustably attached to both ends of the pickup cartridge along the guide bar. (8) The arm includes a first arm rotatably connected in a vertical direction to the base, and one end rotatably connected in a vertical direction to a free end of the first arm. ,and,
2. A pickup device for playing a record according to claim 1, wherein the other end comprises a second arm pivotally connected to the pickup force=tridge side.