JPS6019513Y2 - Structure of terminal case for preventing radio wave interference - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a terminal case for preventing radio interference, which is electrically connected to the brushes of a small motor or the like in order to prevent radio interference.

Conventionally, choke coils for preventing radio wave interference have been inserted and installed inside the motor case, which has had the disadvantage of poor assembly workability.

The purpose of the present invention is to provide a structure of a terminal case for preventing radio wave interference, which eliminates the above-mentioned drawbacks and improves the productivity of motors with choke coils. The coupler that can be attached to the outside of the motor case is constructed by a bendable coupler body and a coupler cover that accommodates the coupler in the unfolded state together with the choke coil, so that the coupler body can be molded in the folded state. and that a suitable number of choke coils are provided at both ends of the coupler, each having an insert fitting and a receiving fitting, and which can be electrically connected to brushes and other electrical parts of the motor.

. An example of implementing the present invention will be described below with reference to the drawings.

As shown in FIG. 1, an insert fitting 3 and a receiving fitting 4 are fixed to both ends of a choke coil 1 which has been wound a suitable number of times around a winding core 2 by tightening or welding.

On the other hand, FIG. 2 shows the coupler body 5, which is an integrally molded product made of synthetic resin or the like, and is molded in the state shown in FIG. Ru.

The main body 5 is composed of a box-shaped insertion terminal 6, a receiving terminal 7, and a flat connecting portion 8 that bendably connects the two terminals 6.7.

A suitable number of holes 10 (six holes in the figure) through which the insertion metal fitting 3 can be inserted and held are bored in the partition wall 9 of the insertion metal terminal 6,
A suitable number of holes 12 (six holes in the figure) through which the receiving fittings 4 can be inserted and held are bored in the partition wall 11 of the receiving fitting terminal 7.

The holding structure for both metal fittings 3 and 4 is preferably such that a claw protruding from the latter insertion fitting is locked in a part of the hole.

In addition, a fitting groove 13 is formed in the center of the pair of side surfaces of the insertion metal terminal 6 in the longitudinal direction, and a fitting protrusion 14 and a retaining protrusion 15 are formed at one end of the pair of side surfaces of the receiving metal terminal 7. Each is installed protrudingly.

Next, FIG. 3 shows a coupler cover 16, which is an integrally molded product made of synthetic resin or the like, has a box shape with one end cut off diagonally, and is open at both ends, and is attached to the coupler body 5 externally. Can be inserted.

The inner surface of the pair of side surfaces of the cover 16 includes a protrusion 17 that fits into the fitting groove 13, a fitting groove 18 that fits the fitting protrusion 14, and a fitting groove that engages with the retaining protrusion 15. Recesses 19 for preventing removal are formed in appropriate correspondence, and the cover 16
A protruding portion 20 is provided on the inner surface of the ceiling surface of the plug terminal 6 to abut on the ceiling surface of the insertion terminal 6.

Further, a pair of mounting portions 21 for fixing the coupler to the outside of the motor case are provided protruding from the outer surface of the ceiling surface of the cover 16.

Next, the procedure for assembling the above-mentioned components and the procedure for attaching the assembled attachment parts of the present invention to the motor will be explained.

First, the choke coil 1 shown in FIG. 1 is attached to the coupler body 5 shown in FIG.
By inserting and holding them into the holes 10 and 12, an appropriate number of pieces (
Usually 3).

When the coupler body 5 is expanded from the state shown in FIG. 2 to the state shown in FIG. 4, each choke coil 1 fits exactly into the space 8' formed between the two terminals 6.7.

At this time, as shown in FIG. 4, mutual interference between the coils is prevented by appropriately changing each posture of the choke coil 1.

In addition, the remaining parts 10 and 12 of both terminals 6 and 7 are as follows:
Insert fittings 3 and receiving fittings 4 fixed to lead wires 22 for carrying out predetermined electrical wiring are inserted and held as appropriate.

Subsequently, the coupler cover 16 shown in FIG. 3 is inserted over the coupler body 5 to which the choke coil 1 is attached, as shown in FIG. 5, from the receiving terminal 7 side.

At this time, the fitting groove 13 in the main body 5, the fitting protrusion 14,
The retaining protrusion 15 and the protruding portion 17 of the cover 16, the fitting groove 18, and the retaining recess 19 are respectively fitted or engaged, and the protruding portion 20 is in contact with the ceiling surface of the plug terminal 6, and the main body 5 and the cover 16 are fixed.

As shown in FIG. 6, the thus assembled mounting part 23 of the present invention is connected to the mating terminal 25 which is normally provided (or specially provided in advance) outside the motor 24 for electrical wiring to each part. Connect the bracket terminal 7, and
By fitting the attachment part 21 of the coupler cover 16 to the end of the water prevention cover 26, which is a part of the bottom plate that is normally provided (or specially provided) on the outside of the motor 24, mounted on.

Incidentally, the water-preventing cover 26 also functions to guide adaptation to the terminal 25.

Further, the coupler cover 16 of the present invention also functions as a water-preventing cover after installation.

As described above, according to the present invention, since the choke coil can be attached to the outside of the motor, the installation workability is superior to the case where the choke coil is attached to the inside of the motor, and this contributes to improving the production efficiency of motors having choke coils.

In addition, since the choke coil is electrically connected from the outside, it is possible to manufacture motors with choke coils with the same specifications as motors without choke coils, and it is possible to unify the production line, thereby reducing the overall Improve productivity.

Furthermore, the coupler body, which constitutes the main part of the mounting part of the present invention, has a complicated shape in which box-shaped terminals are connected to both ends of a flat connecting part, but it has a structure that allows bending at both ends of the connecting part. Productivity is high because it can be molded in a bent state and can be easily plastic molded together with the coupler cover.

Further, the attachment work of the present invention to the outside of the motor can be easily done by simply connecting the terminals without requiring complicated work such as soldering or tightening.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention. Figure 1 is a perspective view of the choke coil, Figures 2A and B are side and front views of the coupler body, and Figures 3A and B are front views of the coupler cover. 4 is a plan view of the choke coil in its attached state, FIG. 5 is a front sectional view of the assembled state, and FIG. 6 is a perspective view of the motor in its attached state. Explanation of symbols of main parts, 1: Choke coil, 3: Plug-in fitting, 4: Receiver, 5: Coupler body, 6: Plug-in terminal, 7: Receiver terminal, 8: Connecting part, 10: Plug-in Metal fitting insertion and holding hole, 12: Receiving metal fitting insertion and holding hole, 16: Coupler cover, 21: Mounting part, 23: Mounting part of the present invention, 24
:motor.

Claims (1)

[Scope of utility model registration request] Box-shaped insertion terminals 6 are attached to both ends of the flat connecting portion 8.
A coupler main body 5 is provided which connects the receiver terminal 7 in a bendable manner, and this is molded in the bent state, and an appropriate number of choke coils 1 are arranged near the connecting portion 8 in the unfolded state, and a suitable number of choke coils 1 are arranged at both ends of the coupler body 5. A terminal for preventing radio wave interference, in which a coupler cover 16 which can be fixed to the outside of the motor is inserted into a coupler body 5 in which the insertion fitting 3 and the receiving fitting 4 can be inserted and held into the holes 10.12 in both terminals 6.7. Case structure.