JPS6347320B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a pick-up cartridge, which greatly facilitates assembly.

Among the pick-up cartridges, the moving magnet type has a cantilever with a stylus attached to the tip that follows the record groove, which is swingably supported. It is placed inside the pole piece formed by inserting it into the core, and the electromotive force generated in the coil by the vibration of the magnet is
It is taken out via a connection pin and used as an output signal.

A pick-up cartridge with such a structure is entirely covered with a housing member and is attached to the head of the tone arm, but conventionally, each of the components making up the pickup cartridge has been assembled and assembled into one piece. There is no directionality, and therefore the workability in assembling parts is poor, and this also causes the problem of high costs.

The present invention has been made to solve such problems. One embodiment of the present invention will be explained with reference to the drawings. In Fig. 1, one bobbin is shown,
It forms the basis of the bobbin member described later. This bobbin 1 is manufactured by molding synthetic resin, and a coil 5 (see Fig. 2) is wound around a shaft portion 4 formed between a flange portion 2 at the tip and a boss portion 3 at the rear end. It turns out. A hole 6 is provided in the flange portion 2 , the shaft portion 4 , and the boss portion 3 in a portion reaching approximately the center thereof, and this hole 6 is communicated with a hole 7 opened in the side portion of the boss portion 3 . . Further, a connecting pin 8 of the coil 5 is made to protrude rearward from the base of the boss part 3, and a part thereof is made to protrude up and down to form a coil connecting part 9.

FIG. 2 shows a bobbin member in which a coil 5 is wound around the bobbin 1 of FIG. 1. That is, the bobbin member 10 is constructed by winding a coil 5 around the shaft portion 4 of the bobbin 1 shown in FIG. It is made by inserting The externally exposed portion of the core member 11 extends along the coil 5, and the bobbin member 10 is connected to a bobbin support member 12 (described later).
(See FIG. 3), so that when it is inserted into the case member 13, it comes into contact with the inner wall of the case member 13. Both ends of the coil 5 are connected to the coil connection portion 9 .

The bobbin support member 12 will be explained with reference to FIG. 3. The bobbin support member 12 is an L-shaped member made of synthetic resin and having a block portion 14 and rod-shaped portions 15 protruding from one side and both sides thereof. This bobbin support member 12
is the bar-shaped portion 15 from the side from which the bar-shaped portion 15 protrudes.
A part of the pole piece 16 made of a metal material is made to protrude along. A portion of this pole piece 16 is bent inside the block part 14 and faces into a hole 17 provided in the block part 14, so as to correspond to a magnet at the base of the cantilever (not shown).

The bobbin support member 12 has the protruding side of the pole piece 16 facing forward, and the two bobbin members 10 are inserted into the bobbin support member 12 in such a way that the pole piece 16 is inserted into the shaft core from the direction of the arrow.
The bobbin member 10 will be attached to. Next, a case member 13 shown in FIG.
The opening 13a of the bobbin member 10, the bobbin support member 12, and the case member 13 are inserted into the integral part from the same direction in which the bobbin member 10 was inserted into the bobbin support member 12. Unify.

FIG. 5 shows a state in which the three parts are integrated in this way. Next, as shown in FIG. 6, a housing member 20 having a recess 19 is moved to this three-part product 18 from the same direction as the above,
The three-piece integral part 18 is fitted into the recess 19, the connecting pin 8 is made to protrude from the hole 21 provided at the rear of the housing member 20, and then screwed from the outside to complete the method of manufacturing the pick-up cartridge of the present invention. .

Since the present invention is a method for manufacturing a pick-up cartridge constructed as described above, each part can be assembled one by one by inserting and inserting them all from the same direction, making assembly easy. Moreover, it has the advantage that it can be done quickly. It also helps reduce costs.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a bobbin used in the method of the present invention, Fig. 2 is a perspective view of a bobbin member, Fig. 3 is a perspective view of a bobbin support member, Fig. 4 is a perspective view of a case member, and Fig. 5 is a perspective view of a bobbin member. A perspective view of the three-part product, Figure 6 is the 5th
FIG. 3 is a perspective view showing the three-piece assembly and housing member shown in the figure. 1... Bobbin, 5... Coil, 8... Connection terminal, 10
...Bobbin member, 11...Core member, 12...Bobbin support member, 13...Case member, 16...Pole piece, 17...Hole, 18...Three-part product, 19...Recessed part,
20...Housing member.

Claims (1)

[Claims] 1. A bobbin support member in which a pair of pole pieces is formed inside a hole into which a cantilever is inserted, a part of the pole pieces protrudes to one side, and a coil is wound around a part of the bobbin support member, and a shaft core of the coil is formed. Two bobbin members each having a U-shaped core member that is partially inserted into the bobbin member, and a part of which is provided with a connecting pin for the coil, the bobbin support member, and the two bobbin members are stored. and a housing member having a recess into which the case member is fitted on one side and a hole into which the connection pin is fitted on the other side, the pole piece of the bobbin support member protrudes. From the side, insert the protruding pole piece into the shaft core part 2.
The two bobbin members are fitted and attached, and the opening of the case member is directed to the bobbin support member which is integrated by fitting the two bobbin members, and the bobbin support member is attached to the bobbin support member. Insert it into the component from the same direction as when it was inserted into it, and integrate it.
Moving the housing member from the same direction as the above-mentioned direction, fitting the three-part unit into the recess, and protruding the connection pin from the hole into which the connection pin is inserted. . A method of manufacturing a pick-up cartridge, comprising: then fixing the three-piece assembly fitted into the housing member with screws inserted from the outside of the housing member.