JPH0631655Y2 - Power supply terminal - Google Patents

Description

TECHNICAL FIELD The present invention relates to a power supply terminal used for electronic devices such as radios and cordless telephones.

2. Description of the Related Art FIG. 3 shows the structure of a conventional power supply terminal.

In FIG. 3, reference numeral 12 is a power supply terminal in contact with a movable contact (not shown) of an electronic device such as a wireless device, and 13 is a case of the power supply. 14 is a backing plate, and the terminal 12 and the backing plate 14 are cases.
It is welded by spot welding as if sandwiching 13. Further, another conventional example is shown in FIG.

Reference numeral 15 is a power supply terminal in contact with a movable contact (not shown), and 16 is a power supply case. Reference numeral 17 is a plate with holes for crimping.

The power supply terminal 15 is fixed together with the contact plate 17 so as to sandwich the case 16 when the power supply terminal 15 is caulked from below in the drawing.

Thus, even in the conventional power supply terminal, the terminals 12 and 15 can be fixed to the cases 13 and 16 of the power supply by spot welding and caulking, respectively.

However, in the former power supply terminal, since the contact plate 14 is fixed by spot welding, it is necessary to control the strength of spot welding, or the contact plate 14 is located in a narrow place or a complicated place. In some cases, there is a problem in assembling workability.

On the other hand, in the latter power supply terminal, since the terminal 15 is crimped, there is a problem that an electric contact failure occurs due to loosening of the crimped portion.

The present invention solves such a conventional problem, does not require strength control in spot welding, can improve assembly workability, and is an excellent power supply that does not cause electrical contact failure. The purpose is to provide a terminal.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a screw-formed terminal head and a mounting bracket on the outside of a power supply case,
The screw is prevented from loosening by tightening it so as to sandwich it from the inside and providing a spring washer between the terminal and the fitting.

Effect Since the present invention is configured in this way, when tightening the terminal and the mounting bracket together with the spring washer, it is possible to fix the terminal to the case of the power supply with stable strength while controlling tightening torque. Also, since the head of the terminal faces the outside of the case, the workability of tightening is also simple.

Embodiment FIG. 1 is a sectional view showing an embodiment of a power supply terminal according to the present invention, and FIG. 2 is an external view showing a radio device using the power supply terminal of FIG.

In FIG. 1, reference numeral 4 denotes a movable contact mounted so as to be movable in a direction perpendicular to a surface of a case 6 of a radio main body 1 (FIG. 2), and 5 denotes a movable contact 4 which is a power supply terminal 3 (see FIG. (Fig. 2)
Is a coil spring for urging the movable terminal 4
Is an E-ring attached to the movable terminal 4 so as not to come off from the case 6.

Reference numeral 8 denotes a terminal for electrically connecting the movable terminal 4 and the power supply 2 to each other. The terminal 8 has a circular shape or a polygonal shape (for example, a hexagonal shape) having a diameter larger than the hole formed in the case 9 of the power supply 2. And a screw portion 8b having a smaller diameter than the hole of the case 9 and having a thread formed therein.

Reference numeral 10 denotes a mounting metal fitting for fixing the terminal 8 to the case 9. The mounting metal fitting 10 has a screw for engaging with the threaded portion 8b of the terminal 8 formed on the inner side surface and a diameter of the outer surface. The case 9 is composed of a cylindrical portion 10a having the same diameter as the hole and a case 10 having a larger diameter than the hole, for example, an annular flange portion 10b.

Reference numeral 11 denotes a spring washer for preventing the screw engagement from loosening when the screw portion 8b of the terminal 8 is tightened to the screw portion of the mounting member 10.

Next, the operation when the power supply terminal 3 is attached to the power supply 2 will be described.

In FIG. 1, after the cylindrical portion 10a of the mounting bracket 10 is fitted into the hole from the back side of the case 9, the head 8a of the terminal 8 having the spring washer 11 attached to the screw portion 8b is tightened from the front side of the case 9, The screw part 8b of 8 and the screw part of the mounting bracket 10 are screwed together,
Therefore, the head portion 8a of the terminal 8 and the flange portion 10 of the mounting bracket 10
The b is attached so as to sandwich the case 9. in this case,
Since the spring washer 11 is attached to the threaded portion 8b of the terminal 8, the threaded portion 8b of the terminal 8 and the threaded portion of the mounting bracket 10 are not loosely screwed together.

Therefore, according to the above-described embodiment, by controlling the torque when tightening the terminal 8, the attachment strength between the terminal 8 and the case 9 is stable, and the terminal 8 that is tightened by the screw structure is used.
Since it is fastened on the outside of the case 9, there is an effect that the terminal 8 can be easily fixed with a general-purpose tool, for example, a spanner, without using a caulking jig or a spot welding machine as in the conventional example. .

Effect of the Invention As is apparent from the above-described embodiment, the head of the terminal on which the screw is formed and the mounting bracket are tightened so that the power supply case is sandwiched from the outside and the inside, respectively, and is loosened between the terminal and the mounting bracket. A spring washer for prevention is provided, and by controlling the torque when tightening, the terminal can be fixed to the case with stable strength, and the assembly can be easily performed.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a power supply terminal according to the present invention, FIG. 2 is an external view showing a radio device in which the power supply terminal of FIG. 1 is used, and FIGS. 3 is a cross-sectional view showing the power supply terminal of FIG. 2 ... Power supply, 3 ... Power supply terminal, 8 ... Terminal, 8a ... Head part, 8b ... Screw part, 9 ... Case, 10 ... Mounting bracket, 10
a …… Cylinder part, 10b …… Flange part, 11 …… Spring washer.

Claims (1)

[Scope of utility model registration request] 1. A head having a diameter larger than a hole formed in a case of a power supply, a terminal having a screw portion formed with a screw and having a diameter smaller than the hole of the case, and a screw portion of the terminal. In order to fit together, a screw is formed on the inner surface, and a fitting with a cylindrical part whose outer diameter matches the hole of the case and a flange part whose diameter is larger than the hole of the case is provided. Attach the terminal attached from the outside of the case,
A power supply terminal, characterized in that the mounting bracket is mounted from the inside of the case, and the screw part of the terminal and the screw part of the mounting bracket are tightened.