JPS6029269Y2 - Headphone shaft mechanism - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of the shaft and bearing structure of a universal joint type in headphones, and a stopper mechanism is provided on the shaft.

Headphones are a speaker system that allows individuals to enjoy music etc. without leaking sound to the outside by placing the speakers in close contact with the ears. Many ideas have been devised to allow the pad to move freely in the summer.

Among these, the structure that supports the headphone body, which consists of a housing part of the headphone and a pad surface that is connected to the housing part and comes into direct contact with the ear, is designed to actively conform to the shape of the human head and ears. There is a universal joint type that allows the main body to move freely.

FIG. 1 atb is a side view and a front view showing a conventional headphone having the above-mentioned universal joint type shaft and bearing structure, and as is clear from the drawing, the shaft 1a,
la', 2a, 2a' and bearings 1b, lb',
There are 4 locations of 2b and 2b', each bearing lb,
The first outer frame and housing part 2 supported by lb', 2b, and 2b' are connected to the shaft 2 at which is provided in the first outer frame 1.
28' and the shafts 1a, 1a provided in the second outer frame 6
Since the ear pads 3 can be freely rotated back and forth and left and right around ', and the ear pads 3 can move in any direction, it is possible to wear the headphones without causing discomfort to the ears.

However, as shown in FIG. 1, the cord 4 and plug 5 that transmit electrical signals to the diaphragm provided inside the housing part 2 must be directly routed into the housing part 2 from the outside. The movement of the earphones caused a sudden swell, which caused discomfort in the ears.

Furthermore, since the plug 5 must be provided separately in the housing portion 2, this causes an increase in the number of steps, which in turn causes an increase in costs.

Therefore, in order to eliminate the above-mentioned drawbacks, the present inventor devised a headphone having a shaft mechanism centered around a plug containing an electric signal line inside between the first outer frame and the housing part. In order to fix the shaft mechanism within the housing part, some sort of fixing means is required, but no such stopper mechanism has been devised.

The present invention was developed in view of the above circumstances, and includes a plug including a lead wire for transmitting an electric signal, which is inserted from the outside to serve as a plug and rotation shaft, and is attached to the axial side of the tip of the plug shaft. This invention relates to a headphone shaft mechanism in which a long groove is provided vertically, the plug is fitted inside a housing, and the plug is fixed by a fixing plate inside the housing.

Hereinafter, one embodiment of the stopper mechanism of the headphone shaft mechanism according to the present invention will be described with reference to the accompanying drawings.

Figures 2a and 2b are a side view and a front view showing a universal joint type headphone using the stopper mechanism of the shaft mechanism according to the present invention, in which 10 is an ear pad that comes into direct contact with the ear, and 11 is an inner ear pad. A housing portion provided with a diaphragm, 12 a first outer frame provided outside the housing portion, 1
3 is a second outer frame provided outside the first outer frame 12, and the first outer frame 12 has a shaft 13a bored through the second outer frame 13.
, 13a' are provided on the first outer frame 12,
12a', it is pivotally supported and can freely rotate left and right as seen from the drawing, as shown by arrow A in FIG. 2a.

Next, as shown in FIG. 2, the housing part 11 is fitted with a shaft 14 protruding from its head and a bearing 14b provided on the first outer frame 12, and a stopper mechanism according to the present invention is installed. By fitting and fixing the provided plug/rotating shaft 15 into a bearing 14b' provided on the first outer frame 12 and a fitting hole of the shaft 14 provided inside the housing portion 11, which will be described later, the above-mentioned The housing 11 is pivotally supported and is rotatable left and right as viewed in the drawing, as already shown in FIG.

Fig. 3a is an enlarged view showing a method of fixing the plug/rotating shaft 15 provided with a stopper mechanism according to the present invention, 15' is the shaft portion, and a pair of key grooves 16 at the tip are perpendicular to the axial direction. It is set in.

17 is a substantially U-shaped fixing plate that fits into the keyway 16;
As shown in FIG. 3, by fitting the U-shaped long groove 17' provided in the fixing plate 17 into the key groove 16, the plug/rotating shaft can be attached to the wall of the housing part 11. 11
’.

Note that 18 is a cord that includes a lead wire for transmitting electrical signals inside.

The headphone shaft structure stopper mechanism according to the present invention has the above-mentioned structure, and in particular, the universal joint type shaft and bearing are used as a plug and rotation shaft that also serves as the plug and shaft of the headphone structure. , the structure of the headphones has become simpler and the appearance is sleeker.

Furthermore, since the plug-cum-rotation shaft maintains sufficient strength as a shaft, failures such as breakage of lead wires around the plug are eliminated, and electrical reliability is improved, which is highly effective.

[Brief explanation of drawings]

Figures 1a and b are side and front views of conventional universal joint headphones; Figures 2a and b are
3A is a side view and a front view showing a universal joint type headphone using a stopper mechanism of a headphone shaft structure according to the present invention, and FIG. 3a is a perspective view showing a stopper mechanism of a headphone shaft structure according to the present invention. b is a perspective view showing the state of use. 1.12...First outer frame, 2,11...
・Housing part, 3, 10...Ear pad, 4.18...Cord, 5...Plug, 6.13...Second outer Frame, 15...
Plug and rotating shaft, la, la't 2at 2a't
13 a+ 14”-”” single shaft, lb, lb
', 2bt 2b't 12at 12a'+
14bt 14b"""" bearing.

Claims (1)

[Scope of utility model registration request] A key groove is provided perpendicular to the axial direction at the tip of the shaft of the plug/rotating shaft provided between the outer frame and the housing that form the universal joint, and a U-shaped fixing member that fits into the groove. A shaft mechanism for headphones, comprising a shaft fixing means made of a plate.