JP6604897B2 - Plug structure - Google Patents

Description

  The present invention relates to a plug having a plug blade on a main body. In particular, the present invention relates to a plug having a main body with an outlet for supplying electric power obtained from the plug blade to a load side electric circuit.

  A plug that inserts and connects a plug blade into an outlet provided in a construction material or the like and supplies power to a load-side electric circuit is well known. On the other hand, a plug having a function of selectively switching power supply to the load-side electric circuit inside the plug body is disclosed in, for example, an earth leakage breaker with a plug blade as disclosed in Patent Document 1, Patent Document 2 Earth leakage protection plugs as disclosed are known. Further, a plug provided with a mechanism capable of increasing or decreasing the number of plug blades corresponding to the wiring form of the outlet inside the plug body is a 2P3P combined plug as disclosed in Patent Document 3 (2P is 2 poles, 3P is 2 poles) Known as having a polar ground terminal).

  The earth leakage circuit breaker with a plug blade of Patent Document 1 electrically connects an outlet and a load device, and when a leakage occurs in the load device, it detects this instantaneously and interrupts the energization of the load device. The leakage protection plug of Patent Document 2 is the same as that of Patent Document 1.

In the plug of Patent Document 3, the outer periphery of the main body is provided so as to be rotatable with respect to the inside, and the number of plug blades is increased or decreased by displacing the position of the plug blade of the ground electrode in conjunction with the rotation of the outer periphery A form that can be connected to both a three-pole outlet and a two-pole outlet is configured.

Japanese Utility Model Publication No. 63-079043 JP 2002-216613 A JP 2013-45634 A

  As described above, in the plug having an additional function provided with the function of switching the power supply and the function of increasing / decreasing the number of plug blades inside the plug body, it is necessary to store the components constituting these additional functions. Therefore, the size of the plug body is larger than that of the plug not having the above function, and the weight tends to increase.

  In a plug having such an additional function, it is necessary to firmly grasp the main body and connect it to an outlet. That is, in the plugs disclosed in Patent Documents 1 and 2, the plug blade is securely inserted into the receptacle blade of the outlet by grasping a surface (side surface) orthogonal to the surface on which the plug blade is disposed. Connect as follows.

  However, when the plug body is gripped, the fingers may wrap around the surface on which the plug blade is disposed, and the fingers may be sandwiched between the plug body and the outlet. In addition, if the plug body is inserted into an outlet while the finger that has been turned around accidentally touches the plug blade, there is a risk of electric shock.

  Further, in the plug disclosed in Patent Document 3, since the outer periphery of the main body is provided so as to be rotatable with respect to the inside, when the plug main body is inserted into the outlet, the receptacle blade is provided with the position of the plug blade. There is a risk that the position is not well defined.

  In view of the above points, an object of the present invention is to provide a plug having a main body structure that can be firmly grasped without pinching fingers when the plug main body is inserted and connected to an outlet.

  The plug structure of the present invention includes a plug body having a plug blade on a predetermined surface, a base portion having a first width forming the predetermined surface, and a second width larger than the first width. And a content storage unit connected to the base. The grip portion of the main body is formed by the step portion formed by the difference in width between the content storage portion and the base portion and the content storage portion.

  Thereby, the main body can be firmly grasped by the grasping portion composed of the content accommodating portion and the step portion. In addition, since the fingers can be hung on the stepped portion, the fingers are not accidentally pinched when the plug body is inserted into the outlet and connected.

  In other words, the plug structure according to one aspect of the present invention forms a main body from a base portion and a content storage portion connected to the base portion. By making the width of the base portion different from the width of the content storage portion and forming the width of the content storage portion larger than the width of the base portion, a step portion resulting from the difference in width is provided. A grip portion of the main body is formed by the step portion and the content storage portion.

  According to this aspect, when grasping the main body of the plug, the main body can be firmly grasped by grasping the grip portion. Thereby, a plug main body can be reliably inserted and connected to an outlet. In addition, when the plug body is removed from the outlet, the grip portion can be firmly held and pulled out.

  Further, the step portion may be configured to have a finger storage portion for storing a finger gripping the main body in the protruding direction of the plug blade.

  In addition to being able to grasp the main body firmly by positioning the finger in the finger storage part when inserting the plug main body into the outlet, it is possible to accidentally pinch fingers when inserting and connecting the plug main body to the outlet. Disappear.

  Further, the content container constituting the main body may be configured in a substantially cylindrical shape having a radial direction in the protruding direction of the plug blade and a length direction in a direction orthogonal to the protruding direction of the plug blade. Good.

  Thereby, when grasping an object, since the substantially cylindrical main body is grasped along the arch shape formed by fingers, the main body can be firmly grasped.

  According to the present invention, it is possible to firmly hold the grip portion formed by the base and the content storage portion, and connect the plug body to the outlet. In addition, when the plug body is plugged into an outlet and connected, there is no possibility of accidentally pinching fingers.

It is an external view of the plug which concerns on this embodiment. It is the external view seen from the upper surface of the plug. It is the schematic in the case of plugging in and connecting to an outlet. It is a schematic diagram when a plug is grasped. It is the schematic which divided | segmented the plug main body. It is the figure which showed the prior art example. It is the figure which showed the prior art example. It is the figure which showed the prior art example.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following preferred embodiments are merely exemplary in nature and are not intended to limit the invention, its scope of application or its uses.

(Outline of the plug)

  The plug 10 according to the present embodiment is a plug that is used by being plugged and connected to an outlet 200 (referred to as a primary side outlet for distinction) arranged in a construction material or the like. The main body of the plug 10 is provided with outlets 31 and 33 (referred to as secondary outlets for distinction), and the load of the load device or the like is inserted into the outlet of the main body of the plug 10 and connected thereto. Supply power to equipment.

  In addition, if a leakage occurs in the main body of the plug 10 due to insulation deterioration of the load device or electrical wiring, this is detected instantaneously and the supply of power from the primary outlet 200 to the load device is cut off. The earth leakage detector and the breaking mechanism are accommodated, and the plug 10 as a whole constitutes a plug-type earth leakage breaker. In particular, the plug 10 is a plug having a total of three plug blades, each of which is connected to a voltage phase and a neutral phase, and a plug blade (referred to as an earth pin) connected to a ground electrode. This is a plug that can be used both when the side outlet 200 is a three-pole outlet with a ground pin insertion hole and when it is a two-pole outlet without a ground pin insertion hole.

  In the following, in a state where the plug 10 is inserted into the primary outlet 200, the surface of the plug 10 facing the front side is referred to as “front surface”, and the surface facing the outlet is referred to as “rear surface”. The directions of “up”, “down”, “left”, and “right” are defined based on the state where the plug 10 is inserted into the outlet.

  As shown in FIG. 1, the plug 10 includes a plug body 20 having a substantially cylindrical shape having a size (for example, 110 × 50 × 55 mm) that can be held by a user (operator) with one finger. The plug main body 20 accommodates contents such as the leakage detecting portion and a blocking mechanism.

  The outer shape of the main body of the plug 10 has a substantially cylindrical shape formed by a base portion 20b2 having a plug blade on a predetermined surface and content storage portions 20b1 and 20a connected to the base portion 20b2.

  The base portion 20b2 is formed to have a width (for example, 30 mm) enough to include a plug blade. The content container 20b1 connected to the base 20b2 is formed to have a width (for example, 50 mm) larger than the base 20b2.

  Due to the difference in the widths, a step 20b3 is formed in the main body 20 of the plug 10. By this step portion 20b3, a finger hook portion can be provided in the main body as an outer shape, and the grip portion of the main body 20 of the plug 10 is formed in combination with the shape of the substantially cylindrical shaped content storage portions 20a and 20b. .

  On the other hand, the step portion 20b3 is provided with a finger storage portion 20b4 for storing a finger that holds the main body 20 in the protruding direction of the plug blade. The finger storage portion 20b4 is formed by a recess formed between the left and right side portions of the base portion 20b2 and the left and right side portions of the content storage portion 20b.

  Since the width of the left and right side surfaces of the base portion 20b2 is smaller than the width of the content container 20 in the left-right direction, when the periphery of the content container 20 is gripped with fingers, Fingers are stored. The fingertips are positioned on the left and right side surfaces of the base portion 20b2, so that the main body 20 can be firmly grasped, and the fingertips are prevented from reaching the rear surface of the base portion 20b2.

  The plug body 20 can be separated forward and backward at the center portion in the front-rear direction, and FIG. 6 shows a state where the plug body 20 is separated forward and backward.

  The plug body 20 includes a front cover 20a constituting the front half and a rear cover 20b constituting the rear half. The front cover 20a has a bottomed box shape that opens to the rear side, and the rear cover 20b has a bottomed box shape that opens to the front side. Further, an engagement claw 20c is provided at the left end of the front cover 20a, and an engagement recess 20d that can be engaged with the engagement claw 20c is provided at the rear cover 20b at a position corresponding to the engagement claw 20c. It has been. Then, the engaging claw portion 20c of the front cover 20a and the engaging concave portion 20d of the rear cover 20b are engaged with each other with the openings of the covers 20a and 20b abutting each other. As a result, the covers 20a and 20b are integrally assembled to form the plug body 20, and a closed space is formed therein. After the assembly, the front cover 20a and the rear cover 20b are screwed and fixed at four corners on the rear surface side of the rear cover 20b by tapping screws (not shown).

  Hereinafter, the plug body 20 simply refers to the plug body after the screwing and fixing. That is, the plug body 20 after screwing and fixing is a front wall portion formed of the bottom wall of the front cover 20a, a rear wall portion disposed on the rear side of the front wall portion and formed of the bottom wall of the rear cover 20b, It consists of surrounding walls of both the front cover 20a and the rear cover 20b, and has four side walls that connect the front wall and the rear wall. The said side wall part is comprised by the up-and-down and right and left wall part. The covering wall part is composed of a front wall part and four side wall parts.

  Although not shown, the leakage protection unit 50 includes a leakage detection unit that detects leakage, and a connection blocking unit that blocks connection between the input and output of the plug when the leakage detection unit detects overcurrent / leakage. . Conventional configurations can be applied to the configurations of the leakage protection unit and the connection blocking unit, and detailed description thereof is omitted here.

  On the rear wall portion of the plug main body 20, an insertion plug 25 composed of two electrode plugs 29, 29 and a ground plug 27 projects from a position near the upper end. A crimp terminal 26 having a function of a ground terminal of the plug 10 is provided at the lower left corner of the same rear wall. The plug 10 is configured to electrically connect the outlet and the load device by inserting the plug 25 into the outlet and inserting the plug of the load device into the three-pole outlet portions 31 and 31 described later.

  On the front wall portion of the plug main body 20, push-type ON buttons 23 and test buttons 24 are arranged in the order of description from the top at intermediate positions in the vertical and horizontal directions. The ON button 23 is a switch that turns on the supply of commercial power to a load device (sets the connected state). The test button 24 turns off the supply of commercial power to the load device in order to check whether the plug 10 operates normally (that is, whether the supply of commercial power to the load device is interrupted when a leakage occurs). It is a switch to be set to (blocking state).

  In addition, on the front wall portion of the plug body 20, a single insertion port 31 (corresponding to a three-pole plug) for inserting a plug of a load device or the like is provided below the test button 24. Although not shown, one similar insertion port is also provided at the center of the lower wall portion which is a part of the side wall portion of the plug body 20. In the lower part of the plug main body 20, a common blade receiving bracket 32 to which a power plug and a grounding plug of a load device or the like inserted from both the insertion ports 31 is fitted is provided.

  On the front wall of the plug body 20, the power supply display unit 21 is provided at a position near the left end above the ON button 23, and the pole number display unit 22 is provided at a position near the right end so as to be at the same height. ing.

  The power display unit 21 is composed of, for example, an LED. When it is detected that the ON button 23 has been pushed and inserted into the outlet, it is possible to energize between the outlet and the load device via the plug 10. Lights when the camera is in a bad state. Thereby, the user who uses the plug 10 can grasp that the commercial power and the load device are normally conducted. On the other hand, the power source display unit 21 is turned off when the plug 10 is in a non-energized state, for example, when an interruption operation is performed by the leakage protection unit 50 that detects overcurrent or leakage. As a result, the user can grasp that an overcurrent or a leakage has occurred, or that the test has been performed normally.

  After the overcurrent or leakage occurs, and after the confirmation of the operation of the plug 10 by the test button 24 is completed, the plug 10 can be used again as a leakage detection breaker by pressing the ON button 23 again. Become.

  The pole number display part 22 represents the state of the number of poles of the plug 25, and a pole number display window 22a formed through the front wall of the plug body 20 and a plug on the rear side of the pole number display window 22a. It consists of a color display section 46a, which will be described later, arranged in the main body 20. In other words, the pole number display unit 22 is configured so that the display color of the color display unit 46a can be seen through the pole number display window 22a.

  In the left wall portion of the plug body 20, a circular recess 28 a having a peripheral wall portion having an arcuate cross section is formed at a position near the upper end. A rectangular button insertion hole 28b is formed so as to penetrate the left side wall portion from the bottom to the front end of the recess 28a. A push-type release button 41 as an operation means is movably inserted into the button insertion hole 28b. The release button 41 has a rod portion 41c extending in the right direction, and prevents the plug body 20 from coming off at a position (hereinafter also referred to as a button reference position) where a tip end (left end portion) projects out of the plug body 20. Has been. The release button 41 is always urged in the protruding direction by a release button spring 42 (see FIG. 2) around the rod portion 41c. That is, the release button 41 is configured to be pushed into the plug body 20 when an operating force is applied, and to return to the protruding position when the operating force is released.

  The present invention is a plug having a main body with an outlet for supplying electric power obtained from a plug blade to a load-side electric circuit, and the main body is formed in a substantially cylindrical shape. Therefore, the present invention is useful as a wide range of plugs in addition to plug-type leakage breakers having a leakage detection function, a breakage function, and the like.

DESCRIPTION OF SYMBOLS 10 Plug 20 Main body 20a Content storage part 20b Content storage part 20b2 Base part 20b3 Step part 20b4 Finger storage part

Claims (3)

A plug having a plug blade on a predetermined surface,
A main body comprising a base portion having a first width forming a predetermined surface, and a content accommodating portion connected to the base having a second width larger than the first width;
A step portion is formed by a difference in width between the content storage portion and the base portion, and the step portion and the content storage portion
A plug structure in which a grip portion of the main body is formed. In claim 1,
The plug according to claim 1, wherein the step portion has a finger storage portion for storing a finger gripping the main body in the protruding direction of the plug blade. In claim 1 or claim 2,
The content container constituting the main body has a substantially cylindrical shape having a radial direction in the protruding direction of the plug blade and a length direction in a direction orthogonal to the protruding direction of the plug blade. To plug.

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