JPH0721038Y2 - Cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a cartridge, and more particularly to a piezoelectric cartridge having a feature in an output terminal mounting structure.

(Prior Art) Conventionally, various types of piezoelectric cartridges have been provided in which vibration of a cantilever is applied to a piezoelectric element and an electric signal generated from the piezoelectric element is taken out.

In these cartridges, to output the output signal of the piezoelectric element to the outside, for example, a lead made of gold or the like is connected to the piezoelectric element, the lead is connected to the connection terminal attached to the piezoelectric element, and the connection terminal is integrated. The converted cartridge is attached to a head shell or the like to electrically connect the terminal on the tone arm side and the connection terminal.

However, this requires a lot of work for connecting the lead to the piezoelectric element and connecting the lead and the connection terminal, and has a drawback that the cost is high because a gold wire is usually used as the lead. Was there.

(Purpose of Invention) The present invention has been proposed to solve the above-mentioned drawbacks.
The purpose is to make the electrical connection between the piezoelectric element and the terminal on the tone arm side only by the connection terminal attached to the cartridge case that holds the piezoelectric element. An object of the present invention is to provide a cartridge that is easy and can reduce costs.

(Configuration of Device) The present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view showing an embodiment of the present invention. In the figure, reference numeral 1 is an armature having a stylus 2 fixed to the lower surface of the tip, and inside thereof is a rod-shaped piezoelectric element made of Rothsiel salt crystals or the like. An end portion of an element (hereinafter referred to as an element) 3 is embedded, and the element 3 extends toward the rear of the armature 1. A disk-shaped damper rubber 4 is covered in the middle of the element 3, and a support rubber 5 having a substantially rectangular parallelepiped shape is attached to the rear end of the element 3.

Next, 6A and 6B are cartridge cases which hold the armature 1, the damper rubber 4, the support rubber 5 and the like from both sides. Here, since these cartridge cases 6A and 6B have substantially symmetrical structures, one of the cartridge cases 6A will be described below in order to avoid duplication. First, at the front of the inner surface of the cartridge case 6A, an opening end 6a having a substantially U shape is formed together with the other cartridge case 6B.
Is formed, and a recess 6b for receiving the base of the armature 1 is formed behind the open end 6a. A recess groove 6c for holding the outer peripheral surface of the damper rubber 4 is formed behind the recess 6b, and a recess 6d for holding the support rubber 5 is provided behind the recess groove 6c.

Further, a notch 6e is provided at the rear end of the recess 6d so that one end of a connection terminal 7 described later can be inserted therethrough. A mounting recess 6f for mounting the other end of the connection terminal 7 is formed on the outer surface of the cartridge case 6A. This mounting recess 6f is shown in FIG. Is illustrated in.

In addition, a plurality of bosses 6g are provided at appropriate positions above and below the inner surface of the cartridge case 6A so as to match the holes (not shown) formed at the corresponding positions of the other cartridge case 6B. It has become.

Next, the connection terminal 7 has a substantially strip shape, and the terminal portion 7a inserted into the support rubber 5 is superposed on the end portion of the element 3 inserted into the support rubber 5 so as to be electrically connected. And a cartridge case on the other end
6A, 6B has a substantially circular mounting end 7b provided with a hole that matches the boss 6h formed in the mounting recess 6f, a pair is formed corresponding to the pair of cartridge cases 6A, 6B, respectively. There is.

To assemble this, armature 1 integrated by element 3, damper rubber 4 and support rubber 5
To the recesses 6b and 6d and the recessed groove 6 of one cartridge case 6A.
The terminal portion 7a which is housed in c and then bent inside the pair of connection terminals 7 is inserted into the gap between the support rubber 5 and the element 3.

Next, by attaching the other cartridge case 6B to the one cartridge case 6A, the armature 1, the element 3, the damper rubber 4 and the support rubber 5 are held, and both the cartridge cases 6A and 6B are adhered to each other. Join. Then, using a suitable jig, the connecting terminal 7 is bent along the mounting recess 6f on the outer surface of the cartridge case 6A, 6B at a substantially right angle as shown by the imaginary line in FIG.
It suffices to lock 7b on boss 6h. At this time, the connection terminal 7 is securely fixed by heat-crimping the tip of the boss 6h.

Note that FIG. 2 shows a state in which the connection terminal 7 is inserted between the support rubber 5 and the element 3 and is bent along the cartridge cases 6A and 6B, as seen from the rear of the support rubber 5. .

Further, FIGS. 3 and 4 show the appearance of the present invention assembled in this way. As shown in FIG. 3, a part of the connection terminal 7 in the mounting recess 6f is slightly projected to the outside,
Connection with a terminal (not shown) on the tone arm side provided on the inner surface of the head shell or the like can be easily performed.

As described above, in the present invention, the vibration of the stylus 2 or the armature 1 corresponding to the sound groove of the record is transmitted to the element 3, and the electric signal corresponding to the distortion of the element 3 is pressed against the rear end of the element 3. Since it is transmitted to the connection terminal 7 via the portion 7a, the vibration of the stylus 2 can be converted into an electric signal and transmitted to the circuit on the tone arm side simply by inserting and attaching the cartridge to the inner surface of the head shell. A type of cartridge can be easily realized.

Although a monaural type cartridge is described in this embodiment, the present invention can also be applied to a stereo type cartridge.

As described above, according to the present invention, the stylus is integrally attached to the piezoelectric element element that follows the armature, and the piezoelectric element element is attached to the piezoelectric element element and held by the cartridge case. One end is inserted and pressed between the support member and the piezoelectric element, and the other end is led out to the outer surface of the cartridge case so as to be connectable to the terminal on the tone arm side. Since the piezoelectric element and the terminal on the tone arm side can be electrically connected only by the connecting terminal, the lead of gold wire or the like can be connected to the piezoelectric element or the connecting terminal as in the past. There is no need for connection, and there are effects such as facilitating manufacturing and assembling work and reducing costs. Further, since the armature, the element, etc. having the stylus are located in the cartridge case, they are protected, the connection terminal is incorporated in the cartridge case, and a part of the other end side of the connection terminal bent to the outside is protected. Since it is projected outward, the connection with the terminal on the tone arm side provided on the inner surface of the head shell can be performed easily and reliably.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 4 show an embodiment of the present invention.
FIG. 1 is an exploded perspective view, FIG. 2 is a rear view of essential parts, FIG. 3 is a plan view, and FIG. 4 is a side view. 1 ... Armature, 2 ... Stylus, 3 ... Piezoelectric element, 4 ... Damper rubber, 5 ... Support rubber, 6A, 6B ... Cartridge case, 7 ... Connection terminal, 7
a …… Terminal part, 7b …… Mounting end

Claims (1)

[Scope of utility model registration request] 1. A piezoelectric element (3) driven by an armature (1) integrally attached with a stylus (2).
And a support member that is mounted on the piezoelectric element (3) and is held by the cartridge case (6A, 6B), and one end is bent between the support member and the piezoelectric element (3). Located inside the cartridge case (6A, 6B) and in pressure contact with the piezoelectric element (3), the other end being bent outward and led out to the outer surface of the cartridge case (6A, 6B), and A cartridge having a connection terminal (7), a part of which protrudes to the outside so as to be connectable to a terminal on the tone arm side.