JPH046288Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a telephone unit.

(Prior Art and its Problems) Conventionally, in most telephone units of this type, the unit case and the terminal plate with a tap are integrally molded. Therefore, a terminal component for relaying the lead wire and the terminal board with a tap has become necessary.

Furthermore, in the conventional case where the unit case and the terminal board with taps are integrated, soldering is required on the external surface in order to connect with the terminal parts. Therefore, when connecting with a lead-open type terminal, the insertion direction is one direction or one side opposite to the soldering part, so the unit case must be positioned when inserted into the handset, making assembly difficult. It was complicated and hot.

In addition, since the legs of the coil or internal relay terminal are soldered, the soldered part has a protruding convex shape, and the convex shape gets in the way when inserting the lug, so the mounting direction must be carefully determined. This also has the disadvantage that the assembly is complicated because it has to be oriented in a direction that does not require soldering.

Moreover, when soldering the lead wires, the lead wires are soldered while being stretched, so there is a high possibility that the lead wires will break due to fatigue or shock stress during continuous loading. The dot was hot.

(Means for solving the problems) The present invention was proposed in view of the above points, and its purpose is to reduce the number of parts, facilitate assembly, and reduce costs. It is an object of the present invention to provide a highly reliable telephone unit capable of preventing breakage of lead wires.

That is, in order to achieve the above object, the present invention is provided with an electroacoustic transducer 5 inside, a terminal plate 8 with a tap on the top surface, and a terminal plate 8 with a tap in the vicinity of the terminal plate 8 with a tap. A frame assembly 4 is formed with a concave lead wire slack portion 4c for loosening a lead wire 6d of a voice coil 6a constituting the voice coil 5, and a unit case 1 houses the frame assembly 4 therein.
The lead wire 6d is pulled out to the terminal plate 8 with a tap through the lead wire slack portion 4c and connected by soldering, and the frame assembly 4 and the unit case 1 housing it are inserted from the outside.
The gist is that the terminal plate 8 with a tap is integrated by a screw 12 screwed into a screw attachment portion 8b provided on the terminal plate 8 with a tap.

(Example) Fig. 1 is an exploded perspective view of a telephone unit according to an embodiment of the present invention, Fig. 2 is a side sectional view showing the assembled state, and Fig. 3 is an enlarged view of the main part of part A in Fig. 2. It is a schematic sectional view.

1 in these figures is a roughly bowl-shaped unit made of synthetic resin, and this unit case 1
A unit cover 3, which has a cylindrical shape with a bottom and has a plurality of sound holes 2 formed in its lower surface, is attached to the unit cover 3.
Further, 4 is a frame assembly, and an electrodynamic electroacoustic transducer 5 is built in a case 4A constituting this frame assembly.

This electro-acoustic transducer 5 includes a cylindrical voice coil 6a provided inside the central portion, a diaphragm 6b and a fixed portion 6c sequentially provided on the outer periphery, and a lead wire 6d drawn out from the voice coil 6a. A fixed portion 6c of the vibration system 6 is fixed to the lower surface of the case 4A of the frame assembly 4. Further, inside the case 4A, there is provided a magnetic circuit 7 comprising a permanent magnet 7a, a yoke 7b having a through hole 7b' formed in the center in the axial direction, a plate 7c, etc., which constitute the electroacoustic transducer 5. The voice coil 6a is disposed within the magnetic gap.

Also, case 4A of frame assembly 4
A through-hole 4b corresponding to the through-hole 7b' is formed approximately at the center of the circular top surface of the terminal board, and on both sides thereof there is a terminal board with a tap having a concave shape for accommodating a part of the terminal board with a tap 8. Storage portions 4a are respectively formed, and when the lead wire 6d of the voice coil 6a is run up to the terminal plate 8 with a tap and connected by soldering, slack is provided in the lead wire 6d to prevent disconnection. A concave lead wire slack portion 4c is formed to prevent this. Note that the case 4A of the frame assembly 4 corresponds to this recess 4c.
A cutout-shaped lead wire guide portion 4d for guiding the lead wire 6d toward the lead wire slack portion 4c and eventually toward the terminal plate 8 with a tap is formed in a part of the outer peripheral surface of the lead wire guide portion 4d.

When assembling, while attaching the vibration system 6 to the case 4A of the frame assembly 4 in which the magnetic circuit 7 is built-in, attach the terminal plate 8 with a tap on the top of the case to the terminal plate 8 protruding from the lead wire storage part 4a. It is attached via the welding boss portion 4e and integrated by applying heat and caulking. This installation procedure is appropriately determined in consideration of workability. The lead wire 6d of the voice coil 6a is pulled out toward the upper surface side via the lead wire guide portion 4d formed on the outer circumferential surface of the case 4A, and is forced to run along the inside of the lead wire slack portion 4c. The conductive portion 8a of each terminal plate 8 with a tap is soldered to the conductive portion 8a. In this case, as shown in FIG. 3, anti-corrosion grease 9 is applied around the soldering to prevent wire breakage due to corrosion. In addition, through hole 7
A braking material 10 is provided on the upper part of b', and the frame assembly 4 is assembled in this manner.

This frame assembly 4 is then housed within the unit case 1. In this case, a screw attachment part 8b is formed approximately in the center of the terminal plate 8 with a tap, and a screw 12 is inserted into the screw hole 1a from the upper part of the unit case 1 through a washer 11.
Furthermore, by threading the threaded portions of the screws 12 into the screw attachment portions 8b, the frame assembly 4 can be easily housed and integrated within the unit case 1. Further, the screw 12 portion is electrically connected to the conductive portion 8a of the terminal plate 8 with a tap.

Thus, by attaching the unit cover 3 with the dust-proof cloth 13 provided inside to the unit case 1, the telephone unit can be completed.

FIG. 4 is a plan view of this telephone unit, and FIG. 5 is a side sectional view of a portion different from that in FIG. 2.

If the washer 11 is replaced by a tab terminal 14 with a washer as shown in FIGS. 6A and 6B, and the terminal is screwed, it is very easy to use common parts as a plug-in unit.

In this case, a recess 1 having a screw hole 1a formed in the upper part of the unit case 1 as shown in FIG.
Since a' is formed in a shape corresponding to the washered tab terminal 14 in consideration of workability during assembly, rotation of the screw 12 is prevented when tightening, resulting in good workability.

(Effects of the invention) As described above, according to the present invention, the terminal board with taps is housed inside the unit case and the lead wires are soldered directly, so there is no need for relay terminal parts, and the terminal board with taps is no longer required with the conventional unit case. Compared to a molded product with an attached terminal plate, if a separate terminal plate with taps is provided in the frame assembly case like this, the parts cost will be lower.
Automatic assembly has the effect of significantly reducing product costs.

Further, the workability when assembling the telephone unit into the handset is good and the assembly is easy. In other words, in the previous model, the lead wires were soldered to the legs of the relay terminal board provided externally, and this part protruded and became a hindrance during assembly, but in the present invention, the terminal board with taps is used. is provided inside, and there is no protrusion on the outside, so workability during assembly is good.

Furthermore, since a part of the lead wire is forcibly loosened before soldering, the chance of wire breakage due to fatigue or shock wire breakage is significantly reduced.At the same time, protecting the area around the terminal with anti-corrosion grease prevents corrosion. This also has the effect of preventing wire breakage.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of one embodiment of the present invention;
3 is an enlarged schematic side sectional view of the main part of part A in FIG. 2, FIG. 4 is a plan view of the unit, and FIG. 5 is a sectional view of the unit in the assembled state. FIG. 6A is a plan view of the tab terminal with a washer, and FIG. 6B is a side view thereof. 1...Unit case, 3...Unit cover, 4...Frame assembly, 4d...Lead wire, 4A...Case, 4c...Lead wire slack portion, 8...Terminal plate with tap, 8b... Screw mounting part, 12...screw.

Claims (1)

[Scope of utility model registration request] An electroacoustic transducer 5 is provided inside, and a terminal plate 8 with a tap is provided on the top surface, and a lead wire 6d of a voice coil 6a constituting the electroacoustic transducer 5 is loosely connected near the terminal plate 8 with a tap. A frame assembly 4 in which a concave lead wire slack portion 4c is formed, and this frame assembly 4
The lead wire 6d is pulled out to the terminal plate 8 with a tap through the lead wire slack portion 4c and connected by soldering, and the frame assembly 4 and the unit case 1 in which it is stored are provided. The unit case 1 is inserted from the outside,
A telephone unit characterized in that the telephone unit is integrated by a screw 12 screwed into a screw attachment portion 8b provided on the terminal plate 8 with a tap.