JPH0747822Y2 - Car plug - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a car plug which is inserted into a socket of a cigarette lighter of an automobile to obtain a power source for devices such as a car stereo, a pot, and a portable vacuum cleaner. is there.

[Conventional technology and its problems]

Conventionally, many car plugs are commercially available, and they are used by inserting them into the socket of the cigarette lighter of each car to obtain a power source and connecting them to each device with a cord, but each car manufacturer has different socket inner diameters. It is slightly different, and in particular, European cars use sockets whose inner diameter is about 2 mm larger than that of domestic cars.

However, the car plugs currently on the market are manufactured based on domestic cars, and the cylindrical body has a slightly smaller diameter than the socket, and has a bulge that bulges in the outer circumferential direction of the body. Even if it can be used for a small diameter cigarette lighter socket of a domestic car, when it is used for a large diameter cigarette lighter socket of a foreign car, it will loosen and fall off immediately after insertion, turning It is impossible to maintain a stable electrical connection due to a short circuit or a short circuit in the socket.Therefore, the user folds the shaft or toothpick of the match and inserts it into the gap to fix it, which is dangerous. It is often the case that the car plug slips out during driving, and the driver had a problem that could be catastrophic and disastrous.

[Means for solving problems]

SUMMARY OF THE INVENTION In view of the above problems, the present invention solves the problems by keeping the outer diameter of the tubular body of a car plug that has been commercially available in Japan as it is and radiating the elastic contact portions to the elastic terminals in at least three directions. Even if it is inserted into the socket of a large-sized cigarette lighter equipped on a foreign car, it can be firmly inserted by firmly applying elastic pressure radially, and it can slip out or rotate. It does not happen.

[Purpose of device]

The present invention is to provide an elastic terminal of a car plug that can be used for domestic cars as well as foreign cars.It can be inserted into a small-sized cigarette lighter socket of a domestic car or a foreign car equipped with a large-sized cigarette lighter socket. Even so, it is an object of the present invention to provide a car plug capable of maintaining a stable insertion state and obtaining a stable electrical connection.

[Constitution of device]

According to the structure of the present invention, the contact terminal is projected on the tubular body accommodating the tube fuse and the contact portion formed with the female thread portion is screwed, and the elastic contact portion of the elastic terminal is bulged to the tubular body. A car plug, in which a small-diameter tubular portion is formed on the tubular body through an inner flange portion, a tube fuse insertion hole is provided at the center of the small-diameter tubular portion, and a male thread portion is formed. Forming a bottomed groove in the direction, forming a notch connected to the groove on the waist of the cylindrical body, and forming a washer-shaped base with a circular hole at the center on the elastic terminal, Plate-like pieces are extended from the outer peripheral edge in at least three directions, each plate-like piece is bent to form a plate-like piece, and each plate-like piece is provided with an elastic contact portion curved in the outer peripheral direction. Each of the elastic contact portions is extended, and an insertion portion for inserting the inside of the cylindrical main body is extended to the tip end side of each elastic contact portion. It is formed.

[Function of device]

According to the present invention, when the base portion of the elastic terminal is brought into contact with the tip end surface of the small-diameter cylindrical portion, each plate-shaped piece is inserted in the groove portion while the insertion portion is inserted inside the cylindrical main body, and The female screw portion of the contact portion is screwed onto the male screw portion of the main body, and the elastic contact portion of the elastic terminal is bulged in at least three directions from the cutout portion of the tubular main body.

〔Example〕

 The present invention will be described below with reference to the drawings of the embodiments.

FIG. 1 is an external perspective view of the car plug of the embodiment, and FIG.
The drawing is a sectional view thereof, and FIG. 3 is a perspective view of the elastic terminal.

The present invention relates to a car plug which is inserted into a socket of a cigarette lighter of an automobile to obtain a power source for devices such as car stereos, pots, and portable vacuum cleaners, and a tip side of a tubular body 1 containing a tube fuse. The contact terminal 2 is made to protrude to the inside and the cap-shaped contact portion 3 having the female thread portion 3a formed on the inner side of the base end side is detachably screwed, and the elasticity of the elastic terminal 6 is attached to the waist 5 of the cylindrical main body 1. A car plug having a bulging contact portion 6d, which is provided on the inner flange portion 1a of the tubular body 1 toward the front end side.
A small-diameter tubular portion 1b having a small diameter is integrally formed with the small-diameter tubular portion 1b, a tube fuse insertion hole is provided at the center of the small-diameter tubular portion 1b, and a male threaded portion 4 is formed on the outer periphery of the male threaded portion 4. Grooves 1c having bottoms are formed radially and at equal intervals in at least three directions, and notches 7 connected to the respective grooves 1c are respectively provided in the waist 5 of the cylindrical main body 1 and the elastic terminals 6 are provided. To the small diameter cylinder
A washer-shaped base portion 6a having a circular hole having the same outer diameter as the tip surface of 1b and having the same inner diameter as the tube fuse insertion hole of the small-diameter cylindrical portion 1b is formed in the center, and the base portion 6a is formed. The plate-shaped pieces 6b are extended radially and at equal intervals in at least three directions by matching the position and number of the groove portions 1c from the outer peripheral edge of the plate-shaped pieces 6b, and the base ends of the respective plate-shaped pieces 6b are substantially aligned in the same direction. Forming plate-like pieces 6b which are bent at right angles and are inserted into the respective groove portions 1c, the plate-like pieces 6b are bulged outward from the notches 7 of the cylindrical body 1 toward the tip end side of the plate-like pieces 6b. For this purpose, the elastic contact portions 6d curved in the outer peripheral direction are respectively extended, and the cylindrical main body 1 is provided to the tip side of each elastic contact portion 6d.
A plate-shaped insertion portion 6c to be inserted into the inside of the base plate 6a is extended, and the plate-shaped piece 6a of the elastic terminal 6 is inserted into the groove portion 1c and the base portion 6a
Is brought into contact with the tip end surface of the small-diameter tubular portion 1b to screw the female threaded portion 3a of the contact portion 3 to the male threaded portion 4 of the tubular main body 1, so that The elastic contact portion 6d of the elastic terminal 6 is bulged in at least three directions from the cutout portion 7.

That is, the car plug in which the elastic terminal 6 of the present invention is assembled can be used for a cigarette lighter socket of a domestic car, and a cigarette lighter socket having a diameter larger than that of a foreign car such as a European car. Even if it is inserted into, it will not come loose or fall out.

The contact part 3 for a car plug of the present invention is a cap-shaped, and has a through hole for the contact terminal 2 formed at the tip thereof, and the contact terminal 2 is protruded so as to be able to advance and retract into the through hole to be connected to a power battery of an automobile. The power source on the positive side is obtained by contacting the terminal mounted on the center bottom of the cigarette lighter socket.
A female thread portion 3a that is screwed to a male thread portion 4 that is threaded on a small-diameter tubular portion 1b of the tubular body 1 to be described later is screwed to the inner circumference on the base end side, and an inward elastic portion described later is screwed to the inside. A standing rib that presses the base 6a of the terminal 6 is formed, and a coil spring that presses the end face of the tube fuse is installed inside the contact terminal 2.

Then, a small-diameter cylindrical portion 1b having a small diameter is integrally formed on the distal end side of the cylindrical main body 1 via the inner flange portion 1a.
A tube fuse insertion hole for inserting a tube fuse from the tip end surface is provided at the center of the core, and a male threaded portion 4 that is screwed with the female threaded portion 3a of the contact portion 3 is formed on the outer periphery of the small diameter tubular portion 1b. In addition, the male threaded portion 4 extends through the threaded portion radially in the axial direction and has groove portions 1c having a bottom in at least three directions at equal intervals.
Is formed.

The bottomed groove portion 1c is a plate-shaped piece of each elastic terminal 6 described later.
6b is inserted in a buried state, and each of the groove portions
Notches 7 connected to 1c are respectively formed through the body 5 of the cylindrical body 1.

The elastic terminal 6 of the present invention is formed of a conductive metal plate, and the base portion 6a has an outer diameter that is the same as the tip surface of the small-diameter cylindrical portion 1b that has a small diameter of the cylindrical main body 1, and the tube of the small-diameter cylindrical portion 1b is centered. A flat washer is formed by forming a circular hole having the same inner diameter as the fuse insertion hole, and the inner diameter allows the tube fuse accommodated in the car plug to be freely inserted and removed. The base 6a of the elastic terminal 6 is formed. Is the male screw part 4
And the female threaded portion 3a are screwed together to form a small-diameter tubular portion of the tubular body 1.
It is sandwiched between the tip surface of 1b and the standing rib inside the contact portion 3.

Then, the plate-shaped pieces 6b of a number and a number matching the groove portion 1b are radially extended from the outer peripheral edge of the base 6a at equal intervals, but in the illustrated embodiment, four plate-shaped pieces 6b are provided. It is extended, and the number is suitably three to five, and each plate-shaped piece 6b bends the base end of the outer peripheral edge of the base portion 6a in the same direction at a substantially right angle, and has a tubular shape toward the tip. A lead wire connecting portion is provided which forms an insertion portion 6c which is re-inserted into the body 5 of the main body 1, and at least one end portion of the insertion portion 6c can be connected to a ground side lead wire from a device. Further, the elastic contact portion 6d curved in an arc shape in the outer peripheral direction in order to bulge from the waist 5 of the cylindrical main body 1 to an intermediate portion between the plate-shaped piece 6b and the insertion portion 6c.
The elastic contact portions 6d swell out from the notches 7 to contact the ground terminal provided on the inner peripheral wall of the socket of the cigarette lighter and to apply elastic pressure outwardly of the inner peripheral wall. is there.

The car plug of the present invention is provided with a contact portion 3 that is a contact terminal 2 that comes in contact with a terminal provided at the center bottom portion of a socket of a cigarette lighter that is connected to a power battery of an automobile and obtains a positive side power source so that the contact terminal 3 can be advanced and retracted. The cylindrical main body 1 is formed by the female thread 3a.
A slit-shaped notch that is screwed to a male threaded portion 4 formed at the tip of the elastic body 6 and that bulges elastic contact portions 6d radially formed on the elastic terminal 6 at equal intervals to the body wall 5 of the cylindrical main body 1. The notch 7 has a sufficient length so as not to hinder the elastic force of the elastic terminal 6, and the threaded portion 4 has a bottomed portion connected to the notch 7. The groove 1c is formed, and the width of the groove 1c and the notch 7 is slightly wider than the width of the plate-like piece 6b of the elastic terminal 6 and the elastic contact 6d.

In assembling the car plug of the present invention, the tube fuse is inserted through the tube fuse insertion hole formed in the small-diameter cylindrical portion 1b of the cylindrical main body 1, and one of the insertion portions 6c of the elastic terminal 6 is connected to the ground side lead. The tip portion is fixed by welding, crimping, or screwing, and the insertion portion 6c side of the elastic terminal 6 is inserted from the tip of the cylindrical main body 1 so that the plate portion 6d is inserted into the groove portion 1c to be embedded and elastic. Notch 7 with contact 6d formed on the waist 5
When the insertion portion 6c is further bulged and at the same time the insertion portion 6c is inserted into the waist 5 on the proximal end side of the tubular main body 1, the base portion 6a comes into contact with the tip end surface of the small diameter tubular portion 1b of the tubular main body 1, Then, in advance,
The female screw portion 3a of the contact portion 3 incorporating the contact terminal 2 and the coil spring is formed on the small diameter cylindrical portion 1b of the cylindrical body 1 and is screwed to the male screw portion 4 having the bottomed groove portion. By
The base portion 6a of the elastic terminal 6 is sandwiched between the tip surface of the small diameter cylindrical portion 1b and the standing rib of the contact portion 3.

The cross-sectional view of the car plug shown in FIG. 2 shows the cross section of the cylindrical body 1 divided in two in the axial direction, and the rear end side is fixed by a ring-shaped fixing tool. is there.

[Effect of device]

According to the present invention, the plate-shaped piece is extended from the outer periphery of the flat washer-shaped base, and the base end of the plate-shaped piece is bent in the same direction at a substantially right angle to facilitate the manufacture of the elastic terminal.
Since the base of the elastic terminal is sandwiched between the contact surface and the tip surface of the tubular body by screwing the contact portion onto the tubular body, the assembly for fixing the elastic terminal is not particularly required. In addition, the tube fuse can be easily replaced by simply unscrewing the contact point at the tip. In addition, the socket of a cigarette lighter has a small diameter due to the configuration in which plate-shaped pieces are provided in at least three directions. It can be used for both domestic cars equipped with the above and European cars equipped with a cigarette lighter socket with a large diameter, and it is not necessary to change the car plug of various equipment to be used by the vehicle, and the socket has a large diameter. There is no risk that the car plug will slacken or fall off, or the electrical connection will become defective, even if it is inserted into the In which connection the resultant can provide highly reliable car plug.

[Brief description of drawings]

FIG. 1 is an external perspective view of the car plug of the embodiment, and FIG.
The drawing is a sectional view thereof, and FIG. 3 is a perspective view of the elastic terminal. 1 ... Cylinder body, 1a ... Inner flange part, 1b ... Small diameter cylinder part, 1c ... Groove part, 2 ... Contact terminal, 3 ... Contact part, 3a ...
… Female screw part, 4 …… Male screw part, 5 …… Waist circumference, 6 …… Elastic terminal, 6a …… Base part, 6b… Plate-like piece, 6c… Insert part, 6d…
… Elastic contact part, 7 …… Notch part.

Claims (1)

[Scope of utility model registration request] 1. A tubular main body accommodating a tube fuse, a contact terminal projecting from the distal end side, and a cap-shaped contact part having a female thread portion formed inside the proximal end side, detachably screwed, A car plug in which an elastic contact portion of an elastic terminal is bulged to the body surroundings of a cylindrical body, and a small diameter cylindrical portion having a small diameter is integrally formed on the distal end side of the cylindrical body via an inner flange portion, A tube fuse insertion hole is provided at the center of the small-diameter cylindrical portion, male threads are formed on the outer circumference, and grooves are formed in the male threads radially and at equal intervals in at least three directions. The cutouts connected to each other are provided so as to penetrate into the circumference of the tubular body, and the elastic terminals have an outer diameter of the same diameter as the tip surface of the small diameter tubular portion, and a tube fuse insertion hole of the small diameter tubular portion is centered. Forming a washer-shaped base portion having a circular hole having the same inner diameter as that of the outer peripheral edge of the base portion. Made to match the number and position of the groove is extended in at least three directions at equal intervals the plate-like pieces radially
The base ends of the respective plate-shaped pieces are bent at substantially right angles in the same direction to form plate-shaped pieces to be inserted into the respective groove portions, and the tubular main body is provided to the tip side of the respective plate-shaped pieces. A plate-shaped insertion portion is provided which extends elastic contact portions curved in the outer peripheral direction in order to bulge outward from the cutout portions, and which is inserted into the inside of the cylindrical main body at the tip end side of each elastic contact portion. By extending the base portion of the elastic terminal against the distal end surface of the small-diameter tubular portion and screwing the female thread portion of the contact portion onto the male thread portion of the tubular body. A car plug characterized in that elastic contact portions of an elastic terminal are bulged in at least three directions from the notch portion.