JP4026213B2 - Headphone and two parallel cords suitable for use with the headphone - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to headphones in which two parallel cords with plugs are led out only from one ear side, and more particularly to the two parallel cords with plugs.
[0002]
[Prior art]
First, the structure of a conventional stereo headphone will be described with reference to FIGS.
3 is a circuit diagram of a general stereo headphone, FIG. 4 is a rear view schematically showing the structure of the first stereo headphone of the prior art, and FIG. 5 is a headphone wearing the stereo headphone shown in FIG. 6 is a rear view schematically showing the structure of the second stereo headphones of the prior art, and FIG. 7 is a schematic line showing the state in which the stereo headphones shown in FIG. 6 are mounted on the head. FIG. 8 is a cross-sectional view showing a conventional two-parallel cord used in a conventional stereo headphone.
[0003]
First, a general stereo headphone circuit will be described with reference to FIG. Normally, the stereo headphones composed of the left speaker Lsp and the right speaker Rsp are connected to one end of the two core wires of the parallel cords Lw and Rw, and the other end of the two core wires is plugged into each speaker Lsp and Rsp. A configuration is adopted in which the left terminal Lt and the ground terminal Gt of each P and the right terminal Rt and the ground terminal Gt are connected to each other.
[0004]
Such a circuit connection is adopted in the stereo headphones 10 of the first form of the prior art shown in FIG. 4 and also in the stereo headphones 20 of the second form of the prior art shown in FIG.
The stereo headphone 10 of the first form of the prior art shown in FIG. 4 is usually a low-end stereo headphone, and from the viewpoint of cost, the parallel cords Lw and Rw are usually provided from the left speaker Lsp and the right speaker Rsp. Each derived structure is adopted. The signal line of the parallel code Lw is soldered to the L terminal of the left speaker Lsp, the ground line is soldered to the ground terminal, the signal line of the parallel code Rw is connected to the R terminal of the right speaker Rsp, and the ground line is the ground. Soldered to the terminal.
In the stereo headphone 10 having such a structure, as shown in FIG. 5, both the left speaker Lsp and the right speaker Rsp are connected by a headband HB or the like which is a connecting member. Or, when removing from this wearing state, it was necessary to move the pendant over the head.
[0005]
As described above, the double-headed stereo headphone 10 in which the cords are led out from both speakers has a problem that it is troublesome to attach to and detach from the head H. As a solution to this problem, there is a one-way stereo headphone 20 in which a cord is derived from only one speaker as shown in FIGS. The stereo headphones 20 are easier to attach to and detach from the head H than the stereo headphones 10 of the double-out type, and feel less uncomfortable with the cord hanging during use.
[0006]
[Problems to be solved by the invention]
However, the stereo headphone 20 is connected to a cord from one speaker to the other speaker via a headband HB or the like, and in the illustrated example, is connected to the right speaker Rsp from the left speaker Lsp. Two soldering points for the cord Hw and one relay connection were necessary, and a minimum of seven were necessary.
For this reason, the one-way stereo headphone 20 has been used for a high added value compared with the double-head stereo headphones 10.
In general, as shown in FIG. 8, the two parallel cords Lw and Rw have the same thickness as the core conductor and the covering.
However, the crossover cord Hw is required to be thin from both the mechanism and appearance sides, and the cord from the speaker to the plug P is required to have strength against pulling and bending, A certain degree of thickness is required due to the balance.
[0007]
The present invention has been made to solve these problems, and it is an object of the present invention to provide a highly reliable but inexpensive headphone and a parallel cord suitable for use in the headphone.
[0008]
[Means for Solving the Problems]
Therefore, in the invention of claim 1 and 2 of the present invention, a headphone, composed of only the left and right speakers and one loudspeaker of the left and right speakers to derive a second parallel corded plugs, as the code Using two long and short parallel cords, the shorter parallel cord is connected to the speaker from which the cord with the plug is derived, and the longer parallel cord is directly connected to the other speaker. The above-mentioned problem is solved by constituting the structure in which a plug is connected to another common tip and making the strength of the shorter parallel cord to be pulled and bent larger than the strength of the longer parallel cord .
[0009]
Further, according to the third and fourth aspects of the present invention, in the stereo headphones, a cord having a different coating thickness of the core wire is used as the two long and short parallel cords, and the shorter one of the two short and long parallel cords is used. The above problem is solved by using a cord having a large coating thickness for the parallel cords and using a cord having a thin coating thickness for the long parallel cords.
[0010]
Furthermore, in the invention of claim 5 of the present invention, as two parallel cords suitable for use in stereo headphones, two parallel cords are coupled to each other over a predetermined length in the longitudinal direction. The above-mentioned problem is solved by configuring the coatings with different thicknesses covering the core wires of the parallel cords.
[0011]
Therefore, the headphone according to the present invention can reduce the number of soldering locations to the minimum of four locations, reduce the occurrence rate of defects, and improve the reliability. Further, the parallel cord of the present invention is difficult to be disconnected, and the reliability can be improved from this point.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the embodiment embodying the present invention in a stereo headphone is described with reference to FIG.
Figure 1 is a rear view showing schematic illustrating a structure of a stereo headphone to which the present invention, and FIG. 2 is a sectional view showing a second parallel cord preferred present invention with reference to the stereo headphone of the present invention .
In the stereo headphones embodying the present invention , the same components as those of the stereo headphones of the prior art will be described with the same reference numerals.
[0013]
In FIG. 1, reference numeral 1 denotes a stereo headphone according to an embodiment of the present invention. This stereo headphone 1 is of a one-way type, in which a left speaker Lsp and a right speaker Rsp are connected by a parallel cord Rw that is a cross cord, and a two parallel cord W with a plug P is connected from the left speaker Lsp. Has been derived.
[0014]
The two parallel cords W are composed of two long and short parallel cords. The shorter parallel cord Lw is connected by soldering the signal line to the L terminal of the left speaker Lsp and the ground line to the G terminal. The parallel cord Rw is soldered at the left speaker Lsp and connected directly to the right speaker Rsp by soldering the signal line to the R terminal and the ground line to the G terminal without being relayed. And the plug P is connected to the other common tip part of both parallel cords Lw and Rw.
Therefore, by adopting such a structure, the stereo headphones 1 of the present invention can realize a one-sided structure, and can reduce the number of soldering locations to a minimum of four.
[0015]
In addition, the cord with a plug needs to have a certain thickness in view of the balance with the appearance, in addition to the strength of the cord and the strength against bending disconnection.
As a code that satisfies such a requirement, FIG. 2 shows a 2- parallel code W according to an embodiment of the present invention. The two parallel cords W have a structure in which two parallel cords Lw and Rw are coupled to each other, and the thicknesses of the respective core wire conductors Co are the same, but the thickness of the covering covering the respective core wire conductors Co. Are different. The thicker coating was labeled Cc-1, and the thinner coating was labeled Cc-2.
[0016]
When applying 2 parallel code W of the present invention shown in FIG. 2 to 2 parallel code W of the stereo headphone 1 shown in FIG. 1, a thick coating Cc-1 code to the short parallel cords Lw, the Using a thin coated Cc-2 cord for the long parallel cord Rw, the signal wire of the thick coated Cc-1 cord to the L terminal of the left speaker Lsp, the ground wire to the G terminal, and a similarly thin coated Cc-2 cord Are directly soldered to the R terminal of the right speaker Rsp and the ground line is directly soldered to the G terminal. These parallel cords Lw and Rw are coupled to each other from the front end where the plug P is connected to the left speaker Lsp.
[0017]
In this way, the two parallel cords W are made different in thickness, the narrower parallel cord Rw is passed through the headband, etc., and the speaker on which the two parallel cords W are not derived is connected to the right speaker Rsp in the embodiment. The thicker parallel cord Lw is used for the speaker on the side that requires strength against pulling and bending and requires a certain degree of thickness in appearance, and for the left speaker Lsp in the embodiment.
When passing the cord through the headband, etc., if the thickness of the cord is large, it will be necessary to widen the groove of the headband, etc. The thinner the thickness, the better the design and design freedom.
[0018]
【The invention's effect】
As is clear from the above description, according to the headphones of the present invention, the soldering location can be reduced to the minimum of 4 locations, and the cost and the yield and reliability can be improved by reducing the defect occurrence rate. Can do. For this reason, it has become possible to introduce one-sided headphones to the price range of conventional low-end corded-out headphones.
In addition, by passing the narrower parallel cord through the headband of the connecting member, the headband is not subject to any special restrictions, and the thicker parallel cord maintains the strength of pulling and bending the cord. The headphones which do not spoil the sound were obtained.
[Brief description of the drawings]
1 is a schematic diagram showing a structure of a stereo headphone to which the present invention.
FIG. 2 is a cross-sectional view showing a two parallel cord of the present invention suitable for use in the headphone of the present invention.
FIG. 3 is a circuit diagram of a general stereo headphone.
FIG. 4 is a rear view schematically showing the structure of a first stereo headphones of the prior art.
5 is a schematic diagram showing a state in which the stereo headphones shown in FIG. 4 are mounted on the head. FIG.
FIG. 6 is a rear view schematically showing the structure of a second stereo headphones of the prior art.
7 is a schematic diagram showing a state in which the stereo headphones shown in FIG. 6 are worn on the head. FIG.
FIG. 8 is a cross-sectional view showing a conventional 2-parallel cord used in a conventional stereo headphone.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Stereo headphone of embodiment of this invention, Lsp ... Left speaker, Rsp ... Right speaker, Lw, Rw ... Parallel cord, Hw ... Cross cord, Cc-1 ... Thick coating, Cc-2 ... Thin coating, Co ... Core wire Conductor, W: Two parallel cords P of the embodiment of the present invention P: Plug, HB: Headband

Claims (5)

In the one-way headphone in which the two parallel cords with plugs are derived only from the left and right speakers and one of the left and right speakers,
The two parallel cords are a combination of two long and short parallel cords,
The end of the shorter parallel cord is connected to one of the left and right speakers from which the two parallel cords with plugs are derived,
Connect the end of the longer parallel cord directly to the other of the left and right speakers,
The headphones according to claim 1, wherein the shorter parallel cord has higher strength against pulling and bending than the longer parallel cord. The headphones according to claim 1,
Further equipped with a headband,
The headphone according to claim 1, wherein the longer parallel cord is connected to the other of the left and right speakers via the headband . In the one-way headphone in which the two parallel cords with plugs are derived only from the left and right speakers and one of the left and right speakers,
The two parallel cords are a combination of two long and short parallel cords,
The end of the shorter parallel cord is connected to one of the left and right speakers from which the two parallel cords with plugs are derived,
Connect the end of the longer parallel cord directly to the other of the left and right speakers,
Headphones characterized in that the thickness of the shorter parallel cord covering of the two long and short parallel cords is larger than the thickness of the longer parallel cord covering . The headphones according to claim 3,
Further equipped with a headband,
  The headphone characterized in that the longer parallel cord is connected to the other of the left and right speakers via the headband. In two parallel cords used for headphones
The two parallel cords are a combination of two long and short parallel cords,
  Connect the end of the shorter parallel cord to one of the left and right speakers from which the two parallel cords are derived,
  Connect the end of the longer parallel cord directly to the other of the left and right speakers,
  The two parallel cords characterized in that the coating thickness of the shorter parallel cord of the two long and short parallel cords is larger than the coating thickness of the longer parallel cord.

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