JP2003187927A - Plug - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To change the direction of a terminal part of a plug. <P>SOLUTION: For the plug 1, a rotation part 2 fixed by an integrally molded part 23 is supported to rotate freely by a supporting part 3 through which, a wiring cord 22 is penetrating and drawn out, in a state that the angle between the direction of center line of a plug pin 21 and the connecting direction of a wiring cord 22 connected to the plug pin is approximately 135°. The first state that the direction of the center line of a plug pin 21 is approximately parallel with the direction of drawing out a wiring cord 22, and the second state that the angle between the direction of the center line of a plug pin 21 and the connecting direction of a wiring cord 22 is approximately 90°, are interchangeable. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug connected to audio equipment.

[0002]

2. Description of the Related Art Conventionally, a plug used for audio input / output of an audio device includes a contact terminal portion of the plug, that is, a straight plug in which the direction of the plug pin is parallel to the pulling direction of the wiring cord, and a plug pin. There is an L-shaped plug whose direction is 90 ° with respect to the wiring cord withdrawing direction.

Straight plugs are used for connecting to stationary audio equipment and small remote controllers of portable audio equipment. On the other hand, the L-shaped plug is used when connecting to the main body of a portable audio device and the like, and since the wiring is drawn out along one surface of the main body, unnecessary stress acting on the wiring cord can be reduced. It is also suitable for space saving.

In recent years, as portable audio equipment has been downsized and the types of audio equipment owned by users have been increasing, there is a demand for a plug that can switch and use both a straight plug and an L-shaped plug. It is rare.

In order to meet such a demand, for example, as disclosed in Japanese Utility Model Laid-Open No. 60-3575, a device for rotating an outlet of a wiring cord of a plug or a plug for an audio device, but a power supply is not used. Regarding the plug for use in, for example, Japanese Unexamined Patent Publication No. 11-144792 and Japanese Utility Model Publication No. 56
As disclosed in Japanese Patent No. 41979, it is devised that the plug portion rotates.

[0006]

However, in the plug described in Japanese Utility Model Laid-Open No. 60-3575, the solder connecting portion for connecting the plug pin and the wiring cord and the rotating bushing portion are separated from each other. Therefore, the rotation of the bushing portion puts stress on the solder connection portion, resulting in low reliability and impracticality.

Further, the above-mentioned JP-A-11-144792.
The plugs described in Japanese Patent Publication No. 56-41979 and Japanese Utility Model Application Laid-Open No. 56-41979 are premised to be used as power supply terminals. They are assembly type and have a very large number of parts, resulting in high production cost and large size. Therefore, it was difficult to apply it to an inexpensive and small plug for audio.

Therefore, an object of the present invention is to provide an inexpensive and small-sized plug which can change the direction of the plug pin and is connected to an audio device.

[0009]

In order to achieve the above-mentioned object, a plug according to the present invention is a plug to be connected to an audio device, wherein a plug terminal and a center line of the plug terminal are provided at a base end portion of the plug terminal. And a wiring cord connected at a predetermined angle with respect to a first state in which the wiring cord withdrawal direction is substantially parallel to the plug terminal centerline and the wiring cord withdrawal direction with respect to the plug terminal centerline Is provided with a switching means for switching to a second state in which the angle becomes a predetermined angle.

In the plug according to the present invention having the above-mentioned structure, the switching means causes the wiring cord to be pulled out in a direction substantially parallel to the center line of the plug terminal.
The direction of the plug terminals is switched so that the wiring cord pulls out in a second state in which the wiring cord pulls out at a predetermined angle with respect to the center line.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A plug to which the present invention is applied will be described below with reference to the drawings.

As shown in FIG. 1, the plug 1 has a first state in which it has substantially the same shape as a straight plug, and as shown in FIG. 2, a second state in which it has substantially the same shape as an L-shaped plug. The state can be arbitrarily switched, and for example, it can be connected to an audio device or the like.

As shown in FIG. 3, the plug 1 includes a rotating portion 2 which is rotatable about a rotation axis, and a supporting portion 3 which rotatably supports the rotating portion 2 as shown in FIG. I have it.

In the plug 1 in the first state, as shown in FIGS. 5 to 9, the center line of the plug pin 21 described later and the direction of drawing out the wiring cord 22 described later from the support portion 3 are substantially parallel to each other. So that the supporting part 3 causes the rotating part 2 to
Are supported and fixed.

5 shows the plug 1 viewed from the front, FIG. 6 shows the plug 1 viewed from above, FIG. 7 shows the plug 1 viewed from below, and FIG. 8 is viewed from the right side surface. FIG. 9 shows the plug 1, and FIG. 9 shows the plug 1 viewed from the left side surface. The back side of the plug 1 in the first state is substantially the same as that shown in FIG.

In the second state, the plug 1 is
As shown in FIGS. 10 to 14, the plug pin 2 described later is used.
1 center line and a wiring cord 22 to be described later from the supporting portion 3.
So that the angle formed by the pull-out direction of the
The rotating portion 2 is supported and fixed by the supporting portion 3.

Here, FIG. 10 shows the plug 1 viewed from the front, FIG. 11 shows the plug 1 viewed from above, FIG. 12 shows the plug 1 viewed from below, and FIG. 13 is viewed from the right side surface. FIG. 14 shows the plug 1, and FIG. 14 shows the plug 1 viewed from the left side surface.
Is shown. The back side of the plug 1 in the second state is substantially the same as in FIG.

As shown in FIG. 3, the rotating portion 2 has a plug pin 21 serving as a connection terminal connected to an audio device or the like.
And a wiring cord 2 electrically connected to the plug pin 21
2 and an integrally molded portion 23 that protects and fixes the connection portion between the plug pin 21 and the wiring cord 22.

The plug pin 21 is a connection terminal having a substantially cylindrical shape, and when inserted into a socket provided in an audio device or the like, the plug pin 21 is electrically connected to the audio device and receives an electric signal output from the audio device. Alternatively, the electrical signal input from the wiring cord side 22 is output to the audio device. The plug pin 21 is provided with, for example, three terminals for transmitting an audio signal corresponding to stereo audio.

The wiring cord 22 is a cable in which two coaxial cables are joined in parallel, and one end of each core conductor is soldered to the plug pin 21 and electrically connected to the plug pin 21. The wiring cord 22 has, for example, a headphone speaker, a microphone,
It is electrically connected to a remote controller or the like.

The integrally molded portion 23 is integrally molded by hard press molding with a hard resin such as polypropylene so as to protect and fix the connection portion between the plug pin 21 and the wiring cord 22. Further, the integrally molded portion 23 fixes the plug pin 21 and the wiring cord 22 so that the angle formed by the center line of the plug pin 21 and the connecting direction of the wiring cord 22 is approximately 135 °. In addition, the integrally molded portion 23,
The side surface in the rotation direction is a curved surface so that the rotating portion 2 can smoothly rotate, and the rotating portion 2 can be downsized.

The integrally molded part 23 has a rotary convex part 24 on both surfaces corresponding to the rotary shaft of the rotary part 2 and two positionings for positioning the rotary part 2 at a fixed position in the first state and the second state. It has a part 25.

The rotating convex portions 24 are provided on both surfaces facing the supporting portion 3 so as to correspond to the rotating shaft of the rotating portion 2 and engage with the rotating holes 32 of the supporting portion 3 which will be described later, to thereby rotate the rotating portion 2. Are rotatably supported by the support portion 3. Also,
The rotation convex portion 24 has a shape in which the tip has a larger diameter than the middle portion, and prevents the rotation convex portion 24 from coming off from the rotation hole 32.

As shown in FIGS. 15 and 16, the positioning portion 25 is arranged so that the plug 1 positions and fixes the rotating portion 2 in the first state and the second state. The positioning portion 25 engages with the positioning portion 34 of the support portion 3 to be described later, so that the rotating portion 2 is in the first state and the second state.
Are to be positioned.

The supporting portion 3 is a holding member that covers the integrally molded portion 23 of the rotating portion 2 so as to rotatably support the rotating portion 2, and a notch portion 31 for the plug pin 21 of the rotating portion 2 to move. It has a rotation hole 32 corresponding to the rotation convex portion 24 of the rotation unit 2, a penetration portion 33 through which the wiring cord 22 penetrates and is drawn out, and a positioning portion 34 corresponding to the positioning portion 25. The support portion 3 is integrally molded of a soft resin such as polypropylene, and is made of a resin material softer than the integrally molded portion 23 of the rotating portion 2.

The notch 31 is an opening through which the plug pin 21 projects from the support portion 3 and also serves as an insertion opening when the rotary portion 2 is inserted into the support portion 3. Notch 31
Is about 90 ° with the rotation of the rotating part 2.
It is provided long along the moving direction of the plug pin 21 so as to be movable within the range.

The rotating hole 32 is an opening for rotatably supporting the rotating portion 2 by engaging with the rotating convex portion 24 of the rotating portion 2.

The penetrating portion 33 is an outlet for pulling out the wiring cord 22 of the rotating portion 2 supported and fixed by the supporting portion 3 from the supporting portion 3, and the wiring cord 22 is penetrated to
The wiring cord 22 is pulled out from the support portion 3. Further, the penetrating portion 33 is provided with a plurality of slits, so that the bending of the wiring cord 22 in the vicinity of the outlet of the wiring cord 22 from the support portion 3 can be suppressed and the wiring cord 22 can be protected. Has become.

As shown in FIGS. 15 and 16, the positioning portion 34 is provided corresponding to the positioning portion 25 of the rotating portion 2, and by engaging with one of the two positioning portions 25, the rotating portion 2 Is positioned and fixed in the first state and the second state. When the rotating unit 2 rotates, the positioning unit 34 opens one of the positioning units 25 by rotating the rotating unit 2 with a predetermined force from the first state, so that the positioning unit 34 enters the second state. Then, the other positioning portion 25 of the rotating portion 2 is positioned and fixed at the fixed position.

Further, the positioning unit 34 is the positioning unit 25.
When it is engaged with, it is pressed by the positioning portion 25 and is pushed outward from the rotary shaft, and then engages with the positioning portion 25, which gives vibration to the user, so-called click feeling,
It can be seen that it is properly positioned in the first state or the second state.

In the plug 1 constructed as described above, the rotating portion 2 is rotatably held by the supporting portion 3 within a predetermined range, and the wiring cord 22 can be pulled out from the holding portion 3 in a constant direction. The direction of the plug pin 21 can be arbitrarily switched between the first state and the second state, as shown in FIGS. 1 and 2. Therefore, the plug 1 can be appropriately changed between the first state and the second state according to the audio device used, and can be selectively used depending on the case, and the convenience for the user can be improved. .

In the plug 1, the angle between the center line of the plug pin 21 and the connecting direction of the wiring cord 22 is about 13.
Since the angle is 5 °, the bending of the wiring cord 22 in the first state and the second state is within a range in which the bending of the wiring cord 22 can be sufficiently absorbed by the elasticity of the wiring cord 22 itself. As a result, in the plug 1, since the wiring cord 22 is not greatly bent and is not subjected to stress, it is possible to prevent the wiring cord 22 from breaking and improve the reliability.

Further, in the plug 1, since the solder connection portion between the plug pin 21 and the wiring cord 22 is fixed and integrated by the integrally molded portion 23, the rotation portion 2 rotates, so that the solder connection portion is stressed. Can be prevented and reliability can be improved.

Furthermore, since the plug 1 can be realized with a simple structure without increasing the number of parts,
It can be manufactured at low cost and in a small size.

In the plug 1 described above, the rotation hole 32 is provided in the holding portion 3. However, a concave portion corresponding to the rotation convex portion 24 is provided inside the holding portion 3 and the concave portion and the rotation convex portion 24 are provided. May be engaged. In this case, the plug 1
Since the rotation hole 32 that penetrates the holding portion 3 is not provided, the rotation convex portion 24 is not exposed outside the holding portion 3 of the plug 1, and it is possible to express characters or characters due to unevenness on this side surface. The sides can be used effectively. Also,
In the plug 1, the rotary convex portion 24 is formed as a concave portion and the rotary hole 32 is formed as a convex portion, so that the same effect as described above can be obtained.

Although the plug 1 has been described as being capable of arbitrarily switching between the first state and the second state, other than the first state and the second state, it is stepwise or continuously. You may make it change a state. For example, when the rotating portion 2 is positioned and fixed stepwise, the rotating portion 2 can be positioned and fixed according to the position of the rotating protruding portion 25 by increasing the number of the rotating protruding portions 25 provided. . As a result, the plug 1 can be switched to a state other than the first state and the second state by increasing the number of the rotation convex portions 25 without increasing the number of parts, which is convenient for the user. The property is improved.

As an example of the plug to which the present invention is applied, as shown in FIGS. 17 and 18, a supporting portion 42 in which the rotating portion 41 and the notch 31 are formed wider than the plug 1.
The plug 40 may include The plug 40
Except for the notch 31 of the supporting portion 42, the configuration is substantially the same as that of the plug 1, and the configuration substantially the same as that of the plug 1 is denoted by the same reference numeral and description thereof is omitted.

Similar to the plug 1, such a plug 40 has a first state in which it has a substantially similar shape to a straight plug as shown in FIG. 17, and an L-shaped plug as shown in FIG. The second state having substantially the same shape can be arbitrarily switched, and for example, it can be connected to an audio device or the like.

In the plug 40 configured as described above, the notch 31 of the supporting portion 42 is formed wider than the plug 1, so that the moving range of the plug pin 21 becomes 90 ° or more, and the audio device The degree of freedom in connecting to etc. is improved.

Further, in the plug 40, since the notch 31 of the support portion 42 is formed wider than the plug 1,
The angle between the plug pin 21 and the connecting direction of the wiring cord 22 connected to the plug pin 21 is approximately 120 ° to 150 °.
Can be set in the range of, and the degree of freedom in design is improved.

Also in the plug 1, the angle formed between the plug pin 21 and the connection direction of the wiring cord 22 connected to the plug pin 21 is approximately 120 ° to 150 ° by widening the inside of the support portion 3. It can be set, and the degree of freedom in design can be improved.

[0042]

As described above, the plug according to the present invention is
Switching means for switching between a first state in which the center line of the plug terminal is parallel to the drawing direction of the wiring cord and a second state in which the angle formed by the center line of the plug terminal and the drawing direction of the wiring cord is a predetermined angle. Can be switched arbitrarily.

As a result, the above-mentioned plug can be appropriately changed between the first state and the second state according to the audio equipment to be used, and can be used properly according to the case.
The convenience of the user can be improved. Also, the first
Even when switching between the state 1 and the second state, the wiring cord is not greatly bent and is not stressed, so that the wiring cord can be prevented from being broken and the reliability can be improved. Furthermore, since the connection portion between the plug terminal and the wiring cord is fixed and integrated, it is possible to prevent stress from being applied to the connection portion and improve reliability.

Further, since the above-mentioned plug can be realized with a simple structure without increasing the number of parts,
It can be manufactured at low cost and in a small size.

[Brief description of drawings]

FIG. 1 is a perspective view showing an external appearance of a plug to which the present invention is applied in a first state.

FIG. 2 is a perspective view showing an appearance of the plug in a second state.

FIG. 3 is a perspective view showing an appearance of a rotating portion of the plug.

FIG. 4 is a perspective view showing an outer appearance of a support portion of the plug.

FIG. 5 is a plan view seen from a side surface of the plug in a first state.

FIG. 6 is a plan view of the plug as viewed from above in a first state.

FIG. 7 is a plan view of the plug as viewed from below in a first state.

FIG. 8 is a plan view of the plug in the first state as viewed from the wiring cord withdrawal direction.

FIG. 9 is a plan view of the plug in the first state, as viewed from the direction in which the plug pins extend.

FIG. 10 is a plan view of the plug as seen from a side surface in a second state.

FIG. 11 is a plan view of the plug as viewed from above in a second state.

FIG. 12 is a plan view of the plug as viewed from below in a second state.

FIG. 13 is a plan view of the plug as viewed in a pulling-out direction of a wiring cord in a second state.

FIG. 14 is a plan view of the plug as viewed from the left side of FIG. 10 in a first state.

FIG. 15 is a cross-sectional view of the center line of the plug pin in the first plane of the plug, taken within the plane of rotation.

FIG. 16 is a cross-sectional view of the center line of the plug pin in the second plane of the plug, taken within the plane of rotation.

FIG. 17 is a perspective view showing an appearance of another plug to which the present invention is applied in a first state.

FIG. 18 is a perspective view showing an appearance of the plug in a second state.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 plug, 2 rotation part, 3 support part, 21 plug pin, 22 wiring code, 23 integral molding part, 24 rotation convex part, 25 positioning part, 31 notch part, 32 rotation hole, 33 penetration part, 34 positioning part

Claims (5)

[Claims] 1. A plug to be connected to an audio device, a plug terminal, a wiring cord connected to a base end portion of the plug terminal at a predetermined angle with respect to a center line of the plug terminal, and the plug terminal. A first state in which the wiring cord withdrawal direction is substantially parallel to the center line of the plug terminal, and a second state in which the wiring cord withdrawal direction is at a predetermined angle with respect to the center line of the plug terminal. A plug having switching means for switching. 2. The switching means includes a fixing member that covers a connecting portion between the plug terminal and the wiring cord and integrally fixes a base end portion of the plug terminal and a connecting end portion of the wiring cord, and the wiring. The plug according to claim 1, further comprising a holding member that rotatably holds the fixing member, the cord penetrating therethrough. 3. The switching means is provided in the holding member with a notch for protruding the plug terminal so that the plug terminal is movable in a range between the first state and the second state. 3. The plug according to claim 2, wherein a positioning portion is provided on the fixing member and the holding member, and the holding member positions the fixing member at a predetermined position by the positioning portion. 4. The fixing member has a connecting direction of the wiring cord with respect to a center line of the plug terminal of approximately 120 ° to 1 °.
The plug according to claim 2, wherein the plug terminal and the wiring cord are integrally fixed to each other so as to form an angle of 50 °. 5. The plug according to claim 4, wherein the fixing member integrally fixes the plug terminal and the wiring cord so that a connection direction of the wiring cord with respect to a center line of the plug terminal is approximately 135 °. .