JPH0648184U - Electrical equipment with plug blade - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent the backward installation of electrical equipment equipped with a plug blade to the outlet. [Structure] The width sizes a and b of a pair of left and right parallel plug blades 9 and 10 provided near the end of the device body 1 are made different.
As a result, even if the plug blades 9 and 10 can be inserted into the blade receiving holes 11 and 12 of the outlet 7 in the correct orientation, they cannot be inserted in the opposite orientation.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric device equipped with a plug blade represented by an electric razor and a foot light.

[0002]

[Prior art]

 Examples of this type of electric equipment include rechargeable electric equipment such as the rechargeable electric razor shown in FIG. 4 and small electric equipment such as foot lights and floor lamps shown in FIG. In some of these devices, a plug plug 8 is provided near the lower end of the device body 1, and the plug plug 8 has a pair of left and right parallel plug blades 9 and 10 having the same width size.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned electric device provided with left and right plug blades 9 and 10 having the same width size, for example, a rechargeable electric device, it is not inserted into the wall outlet 7 in the correct direction during charging, but is inserted into the wrong direction. Sometimes. That is, in the electric shaver shown in FIG. 4, originally, in order to stably insert the electric shaver into the outlet 7, the head portion 1a of the electric shaver 1 is oriented downward as shown by the chain double-dashed line in FIG. The plug blades 9 and 10 protruding toward the lower end should be inserted into the concentrator 7, but on the contrary, as shown by the solid line in the figure, they may be inserted into an unstable posture with the head portion 1a facing upward. . In this way, the electric razor that is inserted and installed upside down with respect to the receptacle 7 cannot support the weight of the device body 1 only with the plug blades 9 and 10 when the head portion 1a begins to tilt even a little. , It may fall on the floor and suffer damage. However, in order to prevent such reverse mounting, it is conceivable to provide a special projecting body on the device body 1 side, but in such a case the structure becomes complicated and the outlet 7 is generally flat. At present, it is difficult to provide such a protrusion because it is flat on a large wall.

In addition, in an electric device such as the foot lamp or the floor lamp shown in FIG. 5 which is used in an upward direction, the heat of the heat generation load is applied to the device body 1 when used in an inverted mounting orientation. May have an unexpected adverse effect on. For example, accidents such as destruction of circuit constants and smoking.

An object of the present invention is to provide an electric device having a pair of left and right parallel plug blades near the ends of the device body as described above, and to prevent the electric device from being plugged into the outlet by simple reverse mounting prevention means. The point is to encourage the user to insert it in the correct orientation, and to prevent accidents such as damage to the device body during charging by dropping it and heat generation during use.

[0006]

[Means for Solving the Problems]

 In the electric device of the present invention, as shown in the illustrated example, of the pair of left and right parallel plug blades 9 and 10 provided near the ends of the device body 1, the width size a of one plug blade 9 and the other plug blade 9 are provided. The width size b of the blade 10 is different.

[0007]

[Action]

 If the width sizes a and b of the left and right plug blades 9 and 10 are different in this way, when the plug blades 9 and 10 are inserted into the left and right blade receiving holes 11 and 12 of different lengths, The insertion mounting can be performed only in a predetermined direction in which the width sizes a and b and the lengths of the blade receiving holes 11 and 12 match, and in the opposite direction, the insertion mounting cannot be performed.

[0008]

【Example】

 FIG. 1 shows an embodiment in which the present invention is applied to a rechargeable electric shaver. The device main body 1 has an outer blade 2 and an inner blade 3 in a head portion 1a thereof, and houses a motor 4 for driving the inner blade 3 and an electric circuit 5 including a charging device therein. . A pair of left and right parallel plug blades 9 and 10 capable of supplying power from the wall outlet 7 to the electric circuit 5 are arranged in the width direction X of the device body 1 near the lower end of one side surface 6 of the device body 1. Preparing for the condition. Of course, the plugs 9 and 10 may be provided on the main surface orthogonal to the width direction X of the device body 1, and the device body 1 may have any shape such as a substantially cylindrical shape. The width size a of the left plug blade 9 is set to be larger than the width size b of the right plug blade 10. In this case, the left and right blade receiving holes 11 and 12 of the receptacle 7 are long and the right blade receiving hole 12 is short when viewed from the front, as defined in JIS C8303. Since the width size a of the left side plug blade 9 is set to the length A of the blade receiving hole 11 on the long side, the width size b of the right side plug blade 10 is set to the length of the blade receiving hole 12 on the short side. The dimensions are set so as to correspond to the size B, respectively.

In such a case, this electric razor makes the head portion 1a of the device body 1 face down. Under proper charging posture, insert the left and right plug blades 9 and 10 into the left and right blade receiving holes 11 and 12 of the outlet 7. However, on the contrary, in an unfavorable charging posture with the head portion 1a facing upward, the left and right plug blades 9 and 10 cannot be inserted into the left and right blade receiving holes 11 and 12 of the outlet 7, It is possible to prevent accidents such as a drop that occurs when the product is installed. Further, in this state, the head portion 1a faces downward, and the electric circuit 5 that generates heat is located above the head portion 1a. Therefore, heat dissipation of the electric circuit 5 is assisted and unnecessary heating of the head portion 1a is suppressed. Of course, the same can be done with a normal charger.

FIG. 2 shows another embodiment applied to a portable electric lamp. In this case, a pair of left and right parallel plug blades 9 and 10 having different width sizes are provided near the lower end of one side surface 6 of the device body 1 so as to be aligned in the longitudinal direction Y of the device body 1. As shown in FIG. 3 (A), when this portable electric lamp is inserted into the outlet 7 in a horizontal position, it tilts by the amount of play (tolerance) between the plug blades 9 and 10 and the blade receiving holes 11 and 12. The tilt angle α ₁ is as shown in (B) of the figure when a portable electric lamp having a pair of left and right parallel plug blades 9 and 10 having the same width size is inserted sideways into the container 7. It is possible to make the angle α ₂ smaller than the angle α ₂ that occurs, so that it is possible to prevent a fall accident due to the inclination.

In this case, in the positional relationship between the plug blades 9 and 10 and the center of gravity G of the device body 1, the plug blade 9 having a large width size a moves away from the position of the center of gravity G of the device body 1 and has a small width size b. It is preferable to set the plug blade 10 in a positional relationship in which it approaches the position of the center of gravity G, because the tilt angle α ₁ can be made smaller than that in a positional relationship opposite to that.

In the above-described embodiment shown in FIG. 1, the plug blades 9 and 10 are provided so as to be able to move in and out of the device body 1 by the operation knob 13. However, instead of this, the plug blades 9 and 10 are provided at the end of the device body 1. The present invention can be similarly applied to a device which is always provided in a protruding state toward the part, or detachably or pivotally provided so as to be provided at a predetermined position when the outlet 7 is inserted.

[0013]

[Effect of device]

 According to the present invention, it is possible to prevent an unfavorable insertion operation such as mounting the socket 7 in the reverse direction by a simple means of changing the width size of the pair of left and right parallel plug blades 9 and 10 of the device body 1. It is possible to prevent accidents such as drop damage of the device body 1 and heat destruction during charging, and enhance safety.

[Brief description of drawings]

FIG. 1 is a perspective view of a rechargeable electric razor and an outlet.

FIG. 2 is a perspective view of a portable electric lamp and an outlet.

FIG. 3A is a front view showing a tilted state when the portable electric lamp of the present invention is inserted into an outlet, and FIG. 3B is a front view showing a tilted state when the conventional portable electric lamp is inserted into the outlet. .

FIG. 4 is a side view showing a state where the conventional electric shaver is undesirably inserted into an outlet.

FIG. 5 is a side view showing a state where a conventional foot lamp is unfavorably inserted into an outlet.

[Explanation of symbols]

 1 Device body 7 Outlet 9/10 Plug blade

Claims (1)

[Scope of utility model registration request] 1. In an electric device having a pair of left and right parallel plug blades 9 and 10 near the end of the device body 1, the width sizes a and b of the left and right plug blades 9 and 10 are different. Electrical equipment with a characteristic plug blade.