JPH083977Y2 - Rotating plug for electrical equipment - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a rotary plug in which a blade is protruded and housed by rotation of an electric device.

[Prior art]

In this rotating plug, when the blade is stored, the electrical connection with the blade inside the electric device is cut off,
There is one in which when the blade is projected, electrical connection with the blade inside is also made. An example is shown in FIG.
In the figure, 3 is a blade, and 30 is a rotating shaft portion that holds the blade 3 integrally and is rotatably attached to the device body. The bent portion of the contact spring 35 that is bent in a circular shape is located. The figure shows a state in which the blade 3 is housed and the blade 3 is not in contact with the contact spring 35. From this state, the rotary shaft portion 30 and the blade 3 are rotated 90 ° in the direction of the arrow in the figure. Then, the blade 3 protrudes from the main body of the device, and the base end of the blade 3 receives the guide of the guide portion 35c at the tip of the contact spring 35 and rides on one surface of the contact spring 35 to contact the contact spring 35. To do. 39 in the figure
Is a contact spring stopper.

[Problems to be solved by the device]

In this case, when the blade 3 rotates and comes into contact with the contact spring 35, the side edge of the blade 3 makes sliding contact with the edge 35e of the contact spring 35 as shown in FIG. For this reason, if edges are raised or burrs are formed on both sides, the reliability of the contact is deteriorated, and the contact spring 35 may be deformed due to biting. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a rotary plug of an electric device having high contact reliability between a rotating blade and a contact spring.

[Means for Solving the Problems]

In the present invention, however, the base end of the blade is rotatably attached to the main body of the device so that the blade can be housed in a protruding manner and is bent in a V shape so that this bent portion is located at the base end side of the blade. The device main body is provided with a contact spring that can be freely contacted with the end, and the blade and the contact spring come into contact with each other when the blade is projected to make an electrical connection, and the blade and the contact spring are not in contact when the blade is stored. In a rotary plug of an electric device, the bent portion of the contact spring has a ridge line intersecting with a line extending from the rotation center of the blade to the outer periphery, and this ridge line serves as a sliding contact portion with the side edge of the blade. It is characterized by being [Operation] According to the present invention, since the sliding contact portion on the contact spring side is formed by the ridge line, sliding contact with the rotation of the blade is made smooth, and biting does not occur. is there. [Embodiment] The present invention will be described in detail below with reference to the illustrated embodiment. A heater shown in FIG. 2 and FIG. 3 is a heater used for heating the hair curler 2, and a device body thereof. The upper housing 12 and the lower housing 13 form a body, and three rod-shaped support portions 11 on which the hair curlers 2 are mounted are projecting upward from the upper surface of the upper housing 12. ing. In the device body, a pair of blades 3, 3 having a rotating shaft portion 30 attached to the base end side are rotatably arranged, and each tapered support portion 11 having a thin tip side. Inside, a pair of connection terminals 41, 42 to be respectively connected to both blades 3, 3 are provided. In the figure, reference numeral 14 denotes a ridge for floating the hair curler 2 from the upper surface of the device body when the hair curler 2 is mounted on the supporting portion 11, and 17 is protruded from the lower housing 23 to support the connection terminals 41 and 42. It is a supporting pillar to do. The hair curler 2 has a heating element (not shown) including a positive temperature coefficient thermistor and the like, and a coaxial connecting terminal pin 24 connected to a pair of electrode plates contacting both surfaces of the heating element.
If the connection terminal pin 24 is inserted into the support portion 11 through the insertion hole that opens at the end face of the support portion 11, the connection terminal pin
24 is connected to the connection terminals 41 and 42. The connection terminals 41, 42 are connected to the blades 30, 30 via the terminal plates 40, 40 for connecting the connection terminals 41, 42 and the contact springs 35, 35 bent in a V shape, respectively. It has become. In the figure, 43 is a fuse. The pair of blades 3, 3 which are rotatable by the pivot shaft 30 being pivotally supported by the device body, have the tips of the blades 3, 3 when they are housed in the device body. Is located in a recess 16 formed in the lower surface of the device body. Further, the rotating shaft portion 30 has a cam body 36 urged by a spring 38.
Are in contact with each other, and an appropriate load is applied to the rotation of the rotation shaft portion 30 and the blade 3. By the way, the blade 3 and the contact spring 35 come into contact with each other when the blade 3 is rotated to project from the device body, and the blade 3
However, the contact spring 35 has a bent portion for forming a dogleg shape, as shown in FIG. 1, and three ridge lines gather at one point. The ridge line 35a of the three ridge lines intersects the line extending from the center of rotation of the blade 3 toward the outer circumference so that a triangular surface is located on the side of the rotating shaft 30. Further, a guide portion 35c is formed at the tip end portion via a bent portion 35b. In the contact spring 35 thus formed, the blade 3
Is rotated from the illustrated storage state, the side edge of the blade 3 is slidably contacted along the ridgeline 35a of the three ridgelines, and finally the apex 35d of the blades 3 where the three ridgelines gather. The surfaces are in contact with each other, and the ridge line 35a is connected to the guide portion 35c, and the ridge line from the center of the rotating shaft portion 30.
A ridge line 35a is formed so that the dimension of the blade 35a up to the contact point of the blade 3 gradually increases as the blade 3 rotates, and smooth contact without biting is obtained. Has become.

[Effect of device]

As described above, in the present invention, since the sliding contact portion of the contact spring with the side edge of the blade is formed by the ridge line, at least the contact portion on the contact spring side has an edge or burrs. Is something that will never happen,
For this reason, sliding contact with the rotation of the blade is made smooth, and reliable contact reliability can be obtained without biting.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, FIGS. 2 and 3 are a cutaway plan view and a cutaway side view of an example of an electric device having a rotary plug of the same, and FIGS. It is a perspective view of an example, 3 is a blade, 30 is a rotating shaft part, 35 is a contact spring, 35a shows a ridgeline.

Claims (1)

[Scope of utility model registration request] 1. A base end of a blade is rotatably attached to a device body so that the blade can be housed in a protruding manner, and is bent in a V shape so that the bent portion is a base end of the blade. The device body is equipped with a contact spring that can be freely contacted with the blade, and the blade and the contact spring come into contact with each other when the blade protrudes to make an electrical connection, and the blade and the contact spring are not in contact when the blade is stored. In the rotary plug of the device, the bent portion of the contact spring has a ridge line intersecting with a line extending from the center of rotation of the blade to the outer periphery, and this ridge line is a sliding contact portion with the side edge of the blade. A rotating plug for electrical equipment.