JP2010086820A - Plug socket device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plug socket device readily stopping pull-out of a plug and releasing stopping in exerting excessive external force. <P>SOLUTION: The plug socket device P includes a vessel 1 having blade inserting holes 10a-10c in one surface 1a. A locking strip 13 locking a locked strip (a fixed part) 115 on the plug 110 to fix the plug 110 at an insertion/pull-out position. A state of locking the locking strip 13 to the locked strip 115 is released when force exceeding a predetermined value is exerted onto the plug 110 and the vessel 1 in mutually separating directions. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an outlet device.

  Conventionally, various types of outlet devices (outlets) have been proposed. In the outlet, the plug is connected to the outlet by holding the plug blade of the plug (plug-in plug) with the blade holder of the outlet. For this reason, the plug can be easily pulled out by external force, for example, the operation of the electric device stops unexpectedly when the plug is pulled out, or the contact area between the plug blade of the plug and the blade holder is reduced, resulting in contact resistance. There is a possibility that a problem arises that high heat is generated due to an increase in the temperature.

Therefore, various structures have been proposed in order to prevent such plugs from coming off. For example, in Patent Document 1, by connecting a plug to an outlet and rotating the plug by a predetermined angle, a projection provided on the receptacle of the outlet enters a through hole provided in the plug blade of the plug to prevent the plug from being removed. A structure is disclosed.
JP 2001-185289 A

  However, in the above-described Patent Document 1, in order to prevent the plug from being detached, the plug must be rotated by a predetermined angle after being connected to the outlet, and the retaining operation is troublesome.

  Moreover, in what is shown in patent document 1, a plug is firmly prevented from detaching and cannot be easily detached. However, for safety reasons, it may be better to disconnect the plug from the outlet when excessive external force is applied. For example, in the case of an electric device that has little influence even when power feeding such as a dryer or rice cooker is stopped, it is preferable that the retaining of the plug is released when an excessive external force is applied. This is because the advantages of preventing breakage of plugs and outlets, disconnection of the cord, and the fall of a person who gets caught in the cord outweigh the demerit that power supply is stopped.

  The present invention has been made in view of the above points, and provides an outlet that can easily prevent a plug from being removed and can release the retaining when an excessive external force is applied. It is in.

  In order to solve the above-described problems, in the invention of claim 1, the container body having a plug blade insertion hole into which the plug blade of the plug is inserted is brought into contact with the plug blade inserted into the plug blade insertion hole. And a plurality of fixing parts comprising a fixing means for fixing the plug and a plurality of fixed parts provided on the plug. The fixing means is configured to release the plug when a force of a predetermined value or more is applied in a direction in which the plug and the body are separated from each other.

  According to the present invention, when a plug having a fixed part is connected, the plug is fixed to the container by the fixed part of the plug and the fixing part of the container. Therefore, unlike the conventional example, it is not necessary to rotate the plug, and the plug can be easily prevented from coming off. In addition, when a force of a predetermined value or more is applied in a direction in which the plug and the container are separated from each other, the fixing of the plug (preventing the plug from being removed) is released. Therefore, when a person gets caught in the plug cord and an excessive external force is applied, the plug is prevented from coming off, thereby preventing the plug from being damaged, the cord from being disconnected, or a person from falling. Can be safe.

  According to a second aspect of the present invention, in the first aspect of the present invention, a peripheral wall portion surrounding the plug is provided on the one surface side of the container body.

  According to the present invention, when the plug is connected to the outlet, it becomes difficult for the finger to touch the plug blade of the plug, so that the possibility of electric shock at the time of connection can be reduced. In addition, since dust does not easily accumulate between plug blades, the possibility of fire due to tracking can be reduced.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the plurality of fixing portions are provided at positions that are point-symmetric with respect to the central axis of the plug.

  According to the present invention, since the load applied in the direction of pulling out the plug can be efficiently distributed by the plurality of fixing portions, the fixing state of the plug is stabilized, and the plug blade of the plug is pulled out from the plug blade insertion hole halfway. State (half-missing state) is less likely to occur.

  The present invention can easily prevent the plug from being detached, and can release the retaining when excessive external force is applied, thereby preventing breakage of the plug, breakage of the cord, falling of the person, etc. It is effective and can be used safely.

  The outlet device (hereinafter simply referred to as “outlet”) P according to an embodiment of the present invention is an indoor outlet used for power supply from a commercial power source, for example.

  For example, as shown in FIGS. 4 and 5, a plug 110 provided at one end of the cord 100 is connected to such an outlet P. The plug 110 has a main body 111 formed in a hollow cylindrical shape from an insulating resin material. The cord 100 protrudes from the rear end surface (upper surface in FIG. 5) of the main body 111. Here, the cord 100 has a three-core structure in which three insulation-coated electric wires are arranged in one insulation tube, and two of the three insulation-coated electric wires are used to connect voltage electrodes. The remaining one is used to connect the ground electrode.

  From the front end surface of the main body 111 (the front end surface, the lower surface in FIG. 5), a total of three plug blades (two flat blades 112a, 112b and one round bar-shaped plug blade 112c) ( The pin is protruding. Here, the two flat-shaped plug blades 112a and 112b are plug blades for voltage electrodes, and a locking hole (through hole) 113 having a circular cross section is provided through the tip portion in the thickness direction. . The round bar-shaped plug blade 112c is a plug blade for the ground electrode. Within the main body 111, the two plug blades 112 a and 112 b are connected to one end of two insulation-coated wires for the voltage electrode of the cord 100, and the plug blade 112 c is connected to one end of the insulation-coated wire for the ground electrode of the cord 100. It is connected.

  Incidentally, two grooves 114 are formed on the outer surface of the plug 110 shown in FIGS. Each groove portion 114 has a longitudinal direction in the axial direction of the main body 111 (insertion / removal direction of the plug 110), and one end thereof (the front end side of the main body 111) is open. The two groove portions 114 are provided at positions that are point-symmetric with respect to the center of the main body 111 (the position of the central axis of the main body 111 in a plane parallel to the tip surface of the main body 111).

  A lock piece 115 is extended from the surface on the other end side in the longitudinal direction of the groove 114 (the rear end side of the main body 111).

  The lock piece 115 has a long elastic piece 115a whose longitudinal direction is a direction along the insertion / extraction direction of the plug 110 (vertical direction in FIG. 5). The elastic piece 115a is formed in a shape having elasticity in a direction intersecting with the insertion / extraction direction of the plug 110, and the length of the elastic piece 115a is the tip of the plug 110 (the plug blades 112a to 112c It is the length which does not protrude outward from the surface to be protruded (the lower surface in FIG. 5). A claw portion 115b for fixing the plug 110 to the outlet P is provided at the tip of the elastic piece 115a. As shown in FIG. 5, the claw portion 115b is formed in a substantially triangular cross section whose size in the insertion / removal direction becomes smaller as it protrudes, and the protrusion direction is opposite to the plug 110 side of the elastic piece 115a (insertion / removal). Projecting in a direction intersecting the direction). Further, a pressing protrusion 115c for easily bending the elastic piece 115a is formed on the middle part of the elastic piece 115a. Further, in the lock piece 115, when the load is not applied to the lock piece 115 (the lock piece 115 is not deformed), the claw portion 115b and the pressing projection 115c protrude outward from the groove portion 114. It is formed into a shape.

  The outlet P of the present embodiment is configured so that both the plug 110 having the lock piece 115 as described above and the general plug 110 having no lock piece 115 can be connected. The general plug 110 here is assumed to be a plug that is widely distributed in the market according to standards such as JIS. In the following description, in order to distinguish between the plug 110 having the lock piece 115 and the general plug 110 having no lock piece 115, the plug 110 having the lock piece 115 is referred to as a “dedicated plug” as necessary. The plug 110 that does not have the lock piece 115 is referred to as a “normal plug”.

  As shown in FIGS. 1 and 2, the outlet P of the present embodiment includes a container 1.

  The container body 1 is a resin molded product made of, for example, an insulating resin material, and is formed in a rectangular parallelepiped box shape. Here, the external size of the container 1 is set to a size that can be housed in an embedded box (switch box) (not shown) embedded in a wall surface of a house, for example.

  Moreover, as shown in FIG. 2, two sets of three plug blade insertion holes 10a to 10c are provided on one surface (one surface in the thickness direction, the upper surface in FIG. 1B) 1a. It has been.

  The plug blade insertion holes 10a and 10b are plug electrode insertion holes for voltage electrodes, and the plug blades 112a and 112b for voltage electrodes of the plug 110 are respectively inserted therein. The plug blade insertion hole 10c is a plug blade insertion hole for the ground electrode, and the plug blade 112c for the ground electrode of the plug 110 is inserted therein. The body 1 is embedded in a wall surface (inner wall surface) of a house using the above-described embedded box so that one surface 1a is exposed, whereby the outlet P is installed on the wall surface (inner wall surface) of the house. .

  Each plug blade insertion hole 10a, 10b is formed in a slit shape as shown in FIG. On the other hand, the plug blade insertion hole 10c is formed in a substantially circular shape.

  In addition, two recesses 11 are formed on one surface 1a of the vessel body 1. The recesses 11 are separated from each other in the longitudinal direction of the vessel 1 (vertical direction in FIG. 2). The cross-sectional shape (opening shape) of the recess 11 is a perfect circular shape having a size (a radius slightly larger than the radius of the main body 111) such that almost no gap is formed between the main body 111 of the dedicated plug 110. . The plug blade insertion holes 10a to 10c are formed on the bottom surfaces of the two recesses 11 one by one. On the other hand, wiring insertion for inserting wiring for a power supply (commercial power supply in the case of this embodiment) is performed on the other surface of the container body 1 (the other surface in the thickness direction, the lower surface in FIG. 1B). A hole (not shown) is formed.

  The container 1 described above accommodates an electrical connection (not shown) for electrically connecting the plug 110 to a power source (commercial power source). The electrical connection part has a blade receiving part (not shown) and a terminal part (not shown). Here, the blade receiving portion has three blade supports for holding the respective plug blades 112a to 112c in contact with each other. In addition, the terminal portion includes, for example, a pair of fast connection terminals for power supply to which power supply wiring is connected and a quick connection terminal for grounding to which a ground line is connected. Since such an electrical connection part can employ | adopt a conventionally well-known thing, detailed description is abbreviate | omitted.

  In order to prevent the dedicated plug 110 from coming off, the outlet P of the present embodiment includes two locking voids 12 into which the claw portions 115b of the two lock pieces 115 enter. In addition, a locking piece 13 that locks the claw portion 115 that has entered the space portion 12 is formed by a portion between the space portion 12 and the opening edge of the recess 11. In other words, in the container 1, the fixing means for fixing the dedicated plug 110 and the locking pieces serving as a plurality of fixing portions individually configured by the lock pieces 115 serving as the plurality of fixed portions provided in the dedicated plug 110. 13 is provided.

  Here, in the present embodiment, as shown in FIG. 3, the corners on the opening edge side of the recesses 11 in the locking pieces 13 (upper corners in FIG. 3) are cut out in a tapered shape to form the inclined surfaces 13 b. It is said. Therefore, it is easier to insert the claw portion 115b into the recess 11 than in the case where the taper is not cut out.

  Therefore, in the case of the dedicated plug 110, the plug blades 112 a to 112 c of the dedicated plug 110 are inserted into the plug blade insertion holes 10 a to 10 c opened in the bottom surface of the recess 11, and the tip of the plug 110 is inserted into the recess 11. If inserted, the claw portion 115 b of the lock piece 115 is locked by the locking piece 13. As a result, the plug 110 is prevented from being detached from the container 1.

  When the dedicated plug 110 fixed to the container body 1 by the fixing means described above is pulled out from the outlet P, the tip of the elastic piece 115a is separated from the inner peripheral surface of the recess 11 by pressing the pressing projection 115c. The elastic piece 115a may be deformed as described above to release the locking state of the claw portion 115b by the locking piece 13.

  Further, since the elastic piece 115a has elasticity, when a force of a predetermined value or more is applied in a direction in which the plug 110 and the container 1 are separated from each other (a direction in which the plug 110 is relatively separated from the container 1). The elastic piece 115a is deformed by such a force, and the locking state of the claw portion 115b by the locking piece 13 is released (fixing of the plug 110 is released).

  That is, the fixing means releases the plug 110 when a force of a predetermined value or more is applied in a direction in which the plug 110 and the container 1 are separated from each other. Here, the above-mentioned predetermined value indicates that the plug 110 is connected to the outlet P before the plug 110 or the outlet P is damaged, the cord 110 of the plug 110 is disconnected, or a person who has caught his / her foot on the cord 110 falls. It is set to a value that will leave The predetermined value is determined by the rigidity of the elastic piece 115a and the shape of the claw portion 115b and the locking piece 13 (particularly, the angle of the contact surface between the claw portion 115b and the locking piece 13). For example, in this embodiment, as shown in FIG. 3, the corners on the side of the void portion 12 in the locking piece 13 are notched in a tapered shape to form an inclined surface 13 a. Therefore, compared with the case where the taper is not cut out, the locked state between the claw portion 115b and the locking piece 13 is easily released.

  As described above, the outlet P of the present embodiment includes the container body 1 having the plug blade insertion holes 10a to 10c into which the plug blades 112a to 112c of the plug 110 are inserted, and the plug blade insertion holes 10a to 10c. It has a blade receiving portion that comes into contact with the inserted plug blades 112a to 112c and an electrical connection portion having a terminal portion connected to a power source. The container body 1 has a plurality of (this book) individually configured with fixing means for fixing the plug 110 with a plurality of (two in the present embodiment) lock pieces 115 that are fixed portions provided in the plug 110. In the embodiment, there are provided locking pieces 13 that are two fixing portions. This fixing means releases the fixing of the plug 110 when a force of a predetermined value or more is applied in a direction in which the plug 110 and the container 1 are separated from each other (a direction in which the plug 110 is relatively separated from the container 1).

  Therefore, according to the outlet P of the present embodiment, when the dedicated plug 110 is connected, the dedicated plug 110 is fixed to the body 1 by the lock piece 115 of the dedicated plug 110 and the locking piece 13 of the body 1. Therefore, unlike the conventional example, there is no need to rotate the plug 110, and the plug 110 can be easily prevented from coming off. Moreover, when the force of a predetermined value or more is applied in the direction in which the dedicated plug 110 and the container body 1 are separated from each other, the fixing of the dedicated plug 110 (preventing plug removal) is released. Therefore, when an excessive external force is applied to the cord 100 of the dedicated plug 110 due to a person's foot being pulled, the retaining of the dedicated plug 110 is released. As a result, it is possible to prevent damage to the dedicated plug 110, breakage of the cord 100, falling of a person, etc., and safety is high. In addition, since the plurality of locking pieces 13 are provided at positions that are point-symmetric with respect to the central axis of the dedicated plug 110, the loads in the direction of pulling out the dedicated plug 110 are efficiently handled by the plurality of locking pieces 13. Can be dispersed. For this reason, the retaining state (fixed state) of the dedicated plug 110 is stable, and it is difficult for the plug blades 112a to 112c of the plug 110 to come off from the plug blade insertion holes 10a to 10c halfway (half-detached state). Become.

  By the way, as the fixing means, in addition to the above-described one composed of the lock piece 115 and the locking piece 13, one using a magnetic force can be employed. Such a fixing means is, for example, a plate made of a material (magnetic material) adsorbed by the magnet on the tip surface of the plug 110 by providing a plate-like fixing portion made of a magnet (permanent magnet) on the one surface 1a of the vessel 1. This can be realized by providing a fixed portion having a shape. If a fixing means using such a magnetic force is used, the operation of fixing the fixed portion to the fixing portion can be easily performed, so that the plug 110 can be easily connected. In this case, the predetermined value can be set according to the strength of the magnet. Further, instead of using the fixed portion as a magnet, the fixed portion may be a magnet. In short, one of the fixed portion and the fixed portion is a magnet, and the other of the fixed portion and the fixed portion is attracted to the magnet. Any material may be used.

  Furthermore, in the outlet P of the present embodiment, the inner surface portion of the recess 11 serves as a peripheral wall portion surrounding the distal end portion of the plug 110 (that is, the distal end portion of the plug 110 is surrounded on the one surface 1a side of the body 1). A peripheral wall portion is provided). Therefore, when connecting the plug 110 to the outlet P, it becomes difficult for a finger to touch the plug blades 112a to 112c of the plug 110, so that the possibility of electric shock during connection can be reduced. In addition, since dust does not easily accumulate between the plug blades 112a and 112b of the plug 110, it is possible to reduce the possibility of fire due to tracking. The depth of the recess 11 is set to a depth suitable for preventing the occurrence of electric shock. Such a depth may be appropriately set in consideration of the size of a human finger or the like.

  In particular, since the cross-sectional shape of the recess 11 is a perfect circular shape with such a size that almost no gap is generated between the main body 111 of the dedicated plug 110 and the dedicated plug 110 is connected to the outlet P. , Dust is less likely to accumulate between the plug blades 112a and 112b of the dedicated plug 110.

  By the way, an indoor outlet is generally attached to the switch box or the like using an attachment frame. In such a case, the decorative plate 14 (see FIG. 6) is used to hide the mounting frame and improve the appearance. Such a decorative plate 14 is formed in a rectangular frame shape having an opening 14 a that exposes one surface 1 a of the container 1. And the decorative plate 14 is arrange | positioned at the one surface 1a side of the container 1. FIG.

  Therefore, such a decorative plate 14 can be used as a part of the container 1. For example, the decorative plate 14 shown in FIG. 6 is provided with a peripheral wall portion 14b. Here, the peripheral wall portion 14 b is formed to surround the tip portion of the plug 110. In addition, the above-described void portion 12 is provided on the inner surface of the peripheral wall portion 14b, and the locking piece 13 is configured by a portion between the void portion 12 and the distal end surface of the peripheral wall portion 14b. . That is, in the example shown in FIG. 6, the recess 11 is not provided on the one surface 1 a of the container 1.

  When the dedicated plug 110 is connected to the outlet P shown in FIG. 6, the plug 110 is inserted so that the plug blades 112 a to 112 c of the dedicated plug 110 are inserted into the plug blade insertion holes 10 a to 10 c provided on one surface of the container 1. Is inserted into the peripheral wall portion 14b. As a result, the claw portion 115 b of the lock piece 115 is locked by the locking piece 13, and the plug 110 is prevented from being detached from the body 1 through the decorative plate 14.

  When the dedicated plug 110 fixed to the container body 1 is pulled out from the outlet P, pressing the pressing projection 115c elastically separates the tip of the elastic piece 115a from the inner peripheral surface of the peripheral wall portion 14b. The piece 115a may be deformed to release the locking state of the claw portion 115b by the locking piece 13.

  Further, since the elastic piece 115a has elasticity, when a force of a predetermined value or more is applied in a direction in which the plug 110 and the container 1 are separated from each other (a direction in which the plug 110 is relatively separated from the container 1). The elastic piece 115a is deformed by such a force, and the locking state of the claw portion 115b by the locking piece 13 is released (fixing of the plug 110 is released).

  Therefore, even with the outlet P shown in FIG. 6, the same effect as the outlet P shown in FIGS.

  By the way, as shown in FIGS. 7 and 8, the plug blade insertion holes 10a to 10c may each be formed in an arc shape having a central angle smaller than 90 degrees. In this case, after the plug 110 is connected to the outlet P, the plug 110 can be rotated by a predetermined angle in a plane parallel to the one surface 1a of the container 1. That is, the plug blade insertion holes 10a to 10c are connected to the plug 110 by a later-described insertion / extraction position where the plug blades 112a to 112c of the plug 110 can be inserted / removed and a later-described retaining portion in a plane parallel to the one surface 1a of the container body 1. The plug 110 is formed so as to be rotatable between a later-described retaining position where the retaining member is prevented from coming off. The pair of plug blade insertion holes 10a, 10b for the voltage electrode are located on substantially the same circumference, but the plug blade insertion hole 10c for the ground electrode is a pair of plug blade insertion holes 10a, 10b. It is located on a different circumference.

  In this case, the cross-sectional shape (opening shape) of the recess 11 is such that the tip of the normal plug 110 can rotate between an insertion / extraction position described later and a retaining position described later, and the main body of the dedicated plug 110. It is a perfect circle shape having a size (a radius that is slightly larger than the radius of the main body 111) so that there is almost no gap between it and 111.

  And the electrical connection part 2 which has the blade receiving part 3 as shown in FIG. 7 is accommodated in the container 1 which has the plug blade insertion holes 10a-10c as shown in FIG.7 and FIG.8. In addition, about the terminal part of the electrical connection part 2, since there is no place different from what is shown in FIGS. 1-3, description is abbreviate | omitted.

  The blade receiver 3 includes blade receivers 3a to 3c that come into contact with the plug blades 112a to 112c inserted into the plug blade insertion holes 10a to 10c, respectively. The blade receivers 3a and 3b are blade holders for voltage electrodes, and the blade receiver 3c is a blade holder for ground electrodes. The pair of blade receptacles 3a, 3b for the voltage electrode is accommodated in the container 1 in a form corresponding to each of the pair of plug blade insertion holes 10a, 10b, and the blade receptacle 3c for the ground electrode corresponds to the plug blade insertion hole 10c. It is stored in the container 1 in the form.

  The blade holder 3c for the ground electrode has a pair of blade receiving springs 30c and 31c that sandwich the plug blade 112c of the plug 110. Each of the pair of blade receiving springs 30c and 31c is formed such that a cross-sectional shape in a plane parallel to the one surface 1a of the container body 1 is an arc shape.

  On the other hand, the blade holder 3a for a voltage electrode has a pair of blade receiving springs 30a and 31a for holding the plug blade 112a. The blade receiving spring 30a (the blade receiving spring that is in contact with the surface of the plug blade 112a opposite to the other plug blade 112b side) 30a has an arcuate cross-sectional shape in a plane parallel to the one surface 1a of the container body 1. It is formed as follows. The blade receiving spring (the blade receiving spring that is in contact with the surface of the plug blade 112a facing the other plug blade 112b) 31a has a cross-sectional shape in a plane parallel to the one surface 1a of the container 1, and the central portion is the blade receiving spring. It is formed in a substantially square shape projecting toward the 30a side. Therefore, the blade receiving spring 31a has two surfaces facing the blade receiving spring 30a, one surface is provided with a locking projection 32, and the other surface is a flat surface. The locking protrusion 32 is used to prevent the plug 110 from coming off, and is formed in a size that enters the locking hole 113 of the plug 110.

  Similarly to the blade receiver 3a, the voltage electrode blade receiver 3b includes a pair of blade receiver springs 30b and 31b that sandwich the plug blade 112b. Each of the blade receiving springs 30b and 31b is formed in the same shape as each of the blade receiving springs 30a and 31a of the blade receiving 3a. Similarly to the blade receiving spring 31a, the blade receiving spring 31b has two surfaces facing the blade receiving spring 30b. One surface is provided with a locking projection 32, and the other surface is flat. Surface.

  A pair of blade receptacles 3 a and 3 b for voltage electrodes are usually arranged at positions that are point-symmetric with respect to the rotation center of the plug 110. Therefore, one surface of the blade receiving spring 31a (the surface on which the locking projection 32 is provided) and one surface of the blade receiving spring 31b (the surface on which the locking projection 32 is provided) are parallel to each other, and the blade receiving spring. The other surface of 31a and the other surface of blade receiving spring 31b are parallel to each other.

  Here, the insertion / extraction position is such that the plug blade 112a is held between the other surface of the blade receiving spring 31a and the blade receiving spring 30a, and the plug blade 112b is connected to the other surface of the blade receiving spring 31b and the blade. This is a position where the plug 110 is connected to the outlet P at a position held between the receiving spring 30b. In this case, since the other surfaces of the blade receiving springs 31a and 31b are flat surfaces, the plug blades 112a and 112b can be freely inserted and removed from the plug blade insertion holes 10a and 10b.

  On the other hand, the above-mentioned retaining position is such that the plug blade 112a is held between one surface of the blade receiving spring 31a and the blade receiving spring 30a, and the plug blade 112b is engaged with one surface of the blade receiving spring 31b. This is a position where the plug 110 is connected to the outlet P at a position held between the spring 30b. At this time, since each locking projection 31 enters the locking hole 113 of each plug blade 112a, 112b of the plug 110, the plug blade 112a, 112b cannot be freely inserted and removed from the plug blade insertion holes 10a, 10b. The plug 110 is prevented from coming off.

  The insertion / extraction position and the removal prevention position can be switched by rotating the normal plug 110 in a plane parallel to the one surface 1a of the container body 1. In addition, the shape of each blade receptacle 3a-3c is suitably set according to the specification of the plug 110 assumed to be used.

  Here, since the exclusive plug 110 has the lock piece 115 as described above, it cannot be rotated between the insertion / extraction position and the removal prevention position, and can be connected to the outlet P only at the insertion / extraction position. .

  As described above, the outlet P shown in FIGS. 7 and 8 includes the container body 1 having the plug blade insertion holes 10a to 10c into which the plug blades 112a to 112c of the plug 110 are inserted, and the plug blade insertion hole 10a. 10c inserted into the blade insertion holes 10a and 10b, and the blade connection portion 3 that is in contact with the blades 112a to 112c inserted into the blade blades 112a to 112c and the terminal portion connected to the power source. 112b is provided with a locking projection 32 that is mechanically coupled to 112b and serves as a retaining portion for retaining the plug 110. The plug blade insertion holes 10a to 10c are prevented from coming off by the insertion / removal positions where the plug blades 112a to 112c of the plug 110 can be inserted / removed and the locking projections 32 in a plane parallel to the one surface 1a of the container body 1. The plug 110 is formed so as to be rotatable between the retaining position.

  In the container 1, a plurality of fixing means for fixing the plug 110 at the insertion / extraction position are individually configured with a plurality of lock pieces 115 (two in the illustrated example) to be fixed provided on the plug 110. Locking pieces 13 which are (in the illustrated example, two) fixing portions are provided. This fixing means releases the fixing of the plug 110 when a force of a predetermined value or more is applied in a direction in which the plug 110 and the container 1 are separated from each other (a direction in which the plug 110 is relatively separated from the container 1).

  Therefore, according to the outlet P shown in FIGS. 7 and 8, when the dedicated plug 110 is connected, the locking piece 115 of the dedicated plug 110 and the container 1 are locked when the dedicated plug 110 is positioned at the insertion / extraction position. The dedicated plug 120 is fixed to the container 1 by the piece 13. Therefore, the dedicated plug 110 can be prevented from being detached, and the dedicated plug 110 can be prevented from coming off unexpectedly. Moreover, when the force of a predetermined value or more is applied in the direction in which the dedicated plug 110 and the container body 1 are separated from each other, the fixing of the dedicated plug 110 (preventing plug removal) is released. Therefore, when an excessive external force is applied to the cord 100 of the dedicated plug 110 due to a person's foot being pulled, the retaining of the dedicated plug 110 is released. As a result, it is possible to prevent damage to the dedicated plug 110, breakage of the cord 100, falling of a person, etc., and safety is high.

  The lock piece 115 and the locking piece 13 constitute a fixing means, and the lock piece 115 is locked by the locking piece 13 simply by inserting the lock piece 115 into the space 12. Therefore, unlike the case of the normal plug 110, it is not necessary to rotate from the insertion / extraction position to the rotation position, so that the connection work of the dedicated plug 110 can be easily performed.

  In addition, since the plurality of locking pieces 13 are provided at positions that are point-symmetric with respect to the central axis of the dedicated plug 110 located at the insertion / extraction position, a load applied in the direction in which the dedicated plug 110 is pulled out is locked in the plurality of The pieces 13 can be efficiently dispersed. For this reason, the retaining state (fixed state) of the dedicated plug 110 is stable, and it is difficult for the plug blades 112a to 112c of the plug 110 to come off from the plug blade insertion holes 10a to 10c halfway (half-detached state). Become.

  On the other hand, in the case of the normal plug 110, the plug blades 112a to 112c of the plug 110 are inserted into the plug blade insertion holes 10a to 10c opened in the bottom surface of the recess 11, and the tip of the plug 110 is inserted into the recess 11. After that, by rotating it by a predetermined angle and positioning it at the retaining position, the retaining protrusion 32 fits into the retaining hole 113 of the plug blade 112a, 112b of the plug 110, and the plug 110 is prevented from coming off. Therefore, it is possible to prevent the normal plug 110 from coming off unexpectedly.

  As described above, according to the outlet P shown in FIGS. 7 and 8, the plug 110 can be prevented from being pulled out regardless of the presence or absence of the lock piece 115, and when the plug 110 has the lock piece 115 (with the dedicated plug 110). In some cases, the retainer can be released when an excessive external force is applied.

  Therefore, in the outlet P shown in FIG. 7 and FIG. 8, in an electrical device that requires constant power supply such as a personal computer or a server, it is normally connected using the plug 110, and power supply to the dryer or rice cooker is stopped. However, in an electrical device or the like that has little influence, it can be connected using the dedicated plug 110. Therefore, the strength of retaining can be properly used according to the type of electric equipment to be used.

  Further, in the outlet P shown in FIGS. 7 and 8, the inner surface portion of the recess 11 becomes a peripheral wall portion that surrounds the tip portion of the plug 110 so as to be rotatable between the insertion / extraction position and the prevention position (that is, On the one surface 1a side of the vessel body 1 is provided a peripheral wall portion surrounding the tip portion of the plug 110 so as to be rotatable between an insertion / extraction position and a removal prevention position. Therefore, when connecting the plug 110 to the outlet P, it becomes difficult for a finger to touch the plug blades 112a to 112c of the plug 110, so that the possibility of electric shock during connection can be reduced. In addition, since dust does not easily accumulate between the plug blades 112a and 112b of the plug 110, it is possible to reduce the possibility of fire due to tracking. The depth of the recess 11 is set to a depth suitable for preventing the occurrence of electric shock. Such a depth may be appropriately set in consideration of the size of a human finger or the like.

  In particular, since the cross-sectional shape of the recess 11 is a perfect circular shape with such a size that almost no gap is generated between the main body 111 of the dedicated plug 110 and the dedicated plug 110 is connected to the outlet P. , Dust is less likely to accumulate between the plug blades 112a and 112b of the dedicated plug 110.

  By the way, as the dedicated plug 110, the one shown in FIG. 9 can also be used. The dedicated plug 110 shown in FIG. 9 is different from that shown in FIGS. 4 and 5 in that it mainly includes a waterproof cover 116.

  The waterproof cover 116 is formed of a flexible resin material (for example, an elastomer such as rubber). The waterproof cover 116 is integrally provided with a cylindrical side wall 116 a that covers the outer peripheral surface of the main body 111 and a rear wall 116 b that covers the rear end surface of the main body 111.

  The outer diameter of the side wall 116 a is set to a size (a value slightly smaller than the inner diameter of the recess 11) such that the outer surface of the side wall 116 a is in close contact with the inner surface of the recess 11. The front end surface (the lower end surface in FIG. 9) of the side wall 116 a is located on the same plane as the plane including the front end surface of the dedicated plug 110. Therefore, when the dedicated plug 110 is connected to the outlet P, the side wall portion 116a is not disturbed (the side wall portion 116a does not cause a gap between the front end surface of the dedicated plug 110 and the outlet P). )

  Further, a claw portion 116c is integrally projected on the distal end side of the outer side surface of the side wall portion 116a. In the dedicated plug 110 shown in FIG. 9, the claw portion 116 c serves as a fixed portion that is locked to the locking piece 13 of the outlet P. Two claw portions 116c are provided on the side wall portion 116a, and the two claw portions 116c are arranged in the diameter direction of the side wall portion 116a. Similar to the above-described claw portion 115c, the claw portion 116c is formed in a substantially triangular cross section whose size in the insertion / removal direction decreases as it protrudes.

  Although not shown in FIG. 9, an insertion hole through which the cord 100 passes is provided in the rear wall portion 116b in the thickness direction (front-rear direction).

  On the other hand, in the main body 111 shown in FIG. 9, a support piece 117 is extended from the surface on the other end side in the longitudinal direction of the groove 114 (the rear end side of the main body 111) instead of the lock piece 115.

  The support piece 117 is for applying a predetermined urging force to the claw portion 116 c of the waterproof portion 116. The support piece 117 has a long elastic piece 117a whose longitudinal direction is the direction along the plug 110 insertion / extraction direction (vertical direction in FIG. 9).

  The elastic piece 117a is formed in a shape having elasticity in a direction crossing the insertion / extraction direction of the plug 110, and the length of the elastic piece 117a does not protrude outward from the tip surface of the plug 110. It is. A support portion 117b is provided at the tip of the elastic piece 117a.

  The support portion 117b is formed in contact with the inner surface of the side wall portion 116a opposite to the claw portion 116c. Thereby, a predetermined urging force is applied to the claw portion 116c.

  Further, a pressing protrusion 117c for easily bending the elastic piece 117a is formed on the middle part of the elastic piece 117a. The support portion 117b and the pressing projection 117c are formed so as not to protrude outward from the groove portion 114 when no load is applied to the support piece 117 (the support piece 117 is not deformed). ing.

  When the dedicated plug 110 shown in FIG. 9 is connected to the outlet P shown in FIG. 1, the plug blades 112 a to 112 c of the dedicated plug 110 are inserted into the plug blade insertion holes 10 a to 10 c opened in the bottom surface of the recess 11. The tip of the plug 110 is inserted into the recess 11. At this time, the claw portion 116 c of the waterproof cover 116 is locked by the locking piece 13, whereby the plug 110 is prevented from being detached from the container body 1. Here, the outer diameter of the side wall 116 a is set to a size such that the outer surface of the side wall 116 a is in close contact with the inner surface of the recess 11. Therefore, in a state where the dedicated plug 110 is connected to the outlet P, water or the like enters the plug blade insertion holes 10a to 10c through the gap between the dedicated plug 110 and the recess 11 and an electrical accident such as a short circuit or a leakage occurs. Can be prevented.

  When the dedicated plug 110 shown in FIG. 9 is pulled out from the outlet P, the elastic piece 117a is moved so that the tip of the elastic piece 117a is separated from the inner peripheral surface of the recess 11 by pressing the pressing projection 117c. Deform. In this way, the support portion 117b is separated from the inner surface of the side wall portion 116a, and a predetermined urging force is not applied to the claw portion 116c. Therefore, by the operation of pulling out the dedicated plug 110 from the outlet P, the locking state of the claw portion 116c by the locking piece 13 is easily released.

  Further, since the elastic piece 117a has elasticity, when a force of a predetermined value or more is applied in a direction in which the plug 110 and the container 1 are separated from each other (a direction in which the plug 110 is relatively separated from the container 1). Thus, the elastic piece 117a is deformed by such a force, and the locking state of the claw portion 116b by the locking piece 13 is released (fixing of the plug 110 is released).

  As described above, even the dedicated plug 110 shown in FIG. 9 can prevent the dedicated plug 110 from being disconnected from the outlet P in the same manner as the dedicated plug 110 shown in FIGS. Can be prevented from coming off. In addition, when a force of a predetermined value or more is applied in a direction in which the dedicated plug 110 and the container 1 are separated from each other, the fixing of the dedicated plug 110 (prevention of plug disconnection) is released, so It is possible to prevent disconnection of wires and falls of people and is highly safe.

  By the way, the technical idea of the present invention can be applied not only to an indoor outlet as described above but also to an outdoor outlet.

  FIGS. 10A and 10B show an outdoor outlet P to which the technical idea of the present invention is applied.

  The outlet P shown in FIG. 10A includes a rectangular plate-like base portion 4 attached to a wall surface (outer wall surface) W of a building (for example, a house). The pedestal 4 is made of an insulating resin material.

  The container 1 is attached to the side opposite to the wall surface W side in the pedestal 4 (the right side in FIG. 10A).

  The container 1 shown in FIG. 10A is formed in a fan-shaped box shape with a central angle of 90 degrees in cross section. The container body 1 has one surface 1a corresponding to one radius of the fan shape directed to one end side in the longitudinal direction of the base portion 4 (lower end side in FIG. 10A) and the other surface corresponding to the other radius of the fan shape. It is attached to the base part 4 in a state facing the base part 4 side. In addition, a pair of plug blade insertion holes 10a and 10b for a voltage electrode and a plug blade insertion hole 10c for a ground electrode are formed on one surface 1a of the container body 1 like the outlet P shown in FIGS. Is formed. Therefore, the electrical connection part similar to the outlet P shown in FIGS. 1-3 is accommodated in the container 1 shown to Fig.10 (a).

  Although not shown in FIG. 10 (a), the container body 1 is provided with a recess 11, a cavity portion 12, and a locking piece 13 like the outlet P shown in FIGS. ing.

  Therefore, even with the outlet P as shown in FIG. 10A, the plug 110 can be easily prevented from coming off as in the case shown in FIGS. In addition, when an excessive external force is applied, the dedicated plug 110 is released from being prevented from being detached. Therefore, the dedicated plug 110 can be prevented from being damaged, the cord 100 can be disconnected, and a person can fall over. The effect that can be obtained.

  Furthermore, in the outlet P shown in FIG. 10A, a waterproof collar 5 is provided at the end of the one surface 1a of the container 1 opposite to the base 4 side. The flange portion 5 can suppress, for example, splashing from being applied to the blade receiving portion 3 in the plug blade insertion holes 10 a to 10 c and the plug blades 112 a to 112 c of the plug 110.

  On the other hand, the outlet P shown in FIG. 10 (b) has a base 4 similar to that shown in FIG. 10 (a), but the shape of the container 1 is different. 10B, the upper side in FIG. 10B is the upper side of the body 1, the lower side in FIG. 10B is the lower side of the body 1, and the left side in FIG. 1 and the right side in FIG. 10B are defined as the front of the body 1.

  The container 1 shown in FIG. 10 (b) has one surface 1a whose normal direction is directed obliquely downward. A pair of plug blade insertion holes 10a and 10b for the voltage electrode and a plug blade insertion hole 10c for the ground electrode are formed on the one surface 1a, similarly to the outlet P shown in FIGS. Therefore, the electrical connection part similar to the outlet P shown in FIGS. 1-3 is accommodated in the container 1 shown to Fig.10 (a).

  Moreover, the container 1 is provided with the recessed part 11, the cavity part 12, and the locking piece 13 similarly to the electrical outlet P shown in FIGS. However, in FIG. 10B, illustration of the void portion 12 and the locking piece 13 is omitted.

  Therefore, even with the outlet P as shown in FIG. 10B, the plug 110 can be easily prevented from coming off as in the case shown in FIGS. In addition, when an excessive external force is applied, the dedicated plug 110 is released from being prevented from being detached. Therefore, the dedicated plug 110 can be prevented from being damaged, the cord 100 can be disconnected, and a person can fall over. The effect that can be obtained.

  Furthermore, the outlet P shown in FIG. 10B includes a waterproof cover 6. The waterproof cover 6 includes a rectangular plate-shaped flat plate portion 60 having a size that can cover the one surface 1 a of the container 1. The flat plate portion 60 is rotatably attached to the upper end side of the one surface 1a of the container body 1 with the width direction of the container body 1 (the normal direction of the paper surface in FIG. 10B) as the rotation axis direction. Here, the range in which the flat plate portion 60 rotates includes a closed position (a position indicated by a dotted line in FIG. 10B) covering the one surface 1a of the container 1 and an open position (FIG. 10) opening the one surface 1a of the container 1. (Position indicated by a solid line in (b)). Further, the flat plate portion 60 is normally biased so as to be positioned at the closed position by using biasing means such as a torsion coil spring. On the other hand, a fixing piece 15 is provided on the lower end side of the one surface 1a of the container body 1 in order to fix the flat plate portion 60 in the closed position. The fixed piece 15 has an elastic piece 15a that protrudes from the container 1 and a fixed claw portion 15b that is formed at the tip of the elastic piece 15a. The fixed claw portion 15 is formed in such a shape that the edge portion of the surface of the flat plate portion 60 opposite to the one surface 1a side can be hooked in a state where the flat plate portion 60 is located at the closed position.

  As described above, since the waterproof cover 6 is normally in the closed position, the one surface 1a of the container 1 is covered with the flat plate portion 60 when the plug 110 is not connected. Therefore, it is possible to reliably prevent the splash from splashing on the blade receiving portion 3 in the plug blade insertion holes 10a to 10c and the plug blades 112a to 112c of the plug 110.

  When connecting the plug 110 to the outlet P shown in FIG. 10B, after the waterproof cover 6 is moved from the closed position to the open position, the plug blades 112a to 112c of the plug 110 are inserted into the plug blade insertion holes 10a to 10c. Insert it into At this time, since the flat plate portion 60 is biased so as to be positioned at the closed position, the flat plate portion 60 comes into elastic contact with the rear end portion of the main body portion 111. In this state, the waterproof cover 6 exhibits the same effect as that of the flange portion 5 shown in FIG. That is, it is possible to prevent the splash from being applied to the blade receiving part 3 in the plug blade insertion holes 10a to 10c and the plug blades 112a to 112c of the plug 110. Further, the flat plate portion 60 of the waterproof cover 6 is integrally provided with a retaining rib 61 that contacts the rear end surface of the main body 111 connected to the outlet P. By providing the retaining rib 61, the waterproof cover 6 can be provided with a function as a plug 110 retaining member.

  10 (a) and 10 (b), the plug blade insertion holes 10a to 10c and the electrical connection portion 2 of the outlet P shown in FIGS. 7 and 8 may be employed. In this case, the same effect as the outlet P shown in FIGS. 7 and 8 can be obtained.

  The above-mentioned outdoor outlet P as shown in FIGS. 10A and 10B is used for charging an electric vehicle C as shown in FIG. 11, for example. Here, the electric vehicle refers to a vehicle on which a battery (secondary battery) and an electric motor (motor) are mounted. This includes a so-called hybrid car in which an internal combustion engine (gasoline engine) and an electric motor are mounted, and a plug. In-hybrid cars are also included.

  The electric vehicle C is provided with an inlet for feeding. The inlet of the electric vehicle adopts a suitable shape and structure according to the standard of the battery mounted on the electric vehicle C and the like. In addition, when the electric vehicle C is equipped with a charging device (not shown) that converts AC power into DC power and charges the battery, the inlet is connected to an AC power source (for example, AC 200V having a frequency of 50 Hz or 60 Hz). It can be connected to a commercial power source.

  In charging the battery of such an electric vehicle C, an electric vehicle charging cord set (hereinafter abbreviated as “code set”) S is used.

  The cord set S is a power cord set used for connecting an outlet corresponding to an AC power source and an inlet of an electric vehicle. A cord set S shown in FIG. 11 is provided on a cord (power-side cord) 100 provided with a plug 110 connected to an outlet P installed on a wall surface (outer wall surface) of a building (for example, a house) and an inlet of an automobile C. A cord (load-side cord) 130 provided with a connector 120 to be connected, and a leakage breaker 140 that connects the power-side cord 100 and the load-side cord 120 and breaks the electrical path between the cords 100 and 120 when a leakage occurs. I have.

  Note that the use of the outdoor outlet P is not limited to the charging of the electric vehicle C, and can be used for various purposes such as feeding power to a garden lamp installed in a garden.

  As mentioned above, although embodiment of the outlet apparatus of this invention was described, the above-mentioned example is only an example to the last. Therefore, the technical scope of the present invention is not limited to the above examples, and each embodiment can be changed without departing from the spirit of the present invention.

  For example, in the above example, the locking projections 32 provided on the pair of blade receivers 3a and 3b for the voltage electrode constitute a retaining portion. However, the retaining portion only needs to be mechanically coupled to the plug blades 112a to 112c inserted into the plug blade insertion holes 10a to 10c to prevent the plug 110 from being detached. For example, as the retaining portion, a hook receiving portion for hooking a hook-type plug blade defined in JIS may be employed. That is, as the retaining portion of the outlet P, those widely used in accordance with JIS (JIS C8303-1993) and other standards can be adopted. Further, the shape of the vessel body 1, particularly the shape of the plug blade insertion holes 10 a to 10 c is not limited to the above example, and may be configured to have no plug blade insertion hole 10 c for the ground electrode. .

The outlet apparatus of one Embodiment of this invention is shown, (a) is a partial front view, (b) is explanatory drawing of a connection state with a plug. It is a front view of an outlet apparatus same as the above. It is a fragmentary sectional view of an outlet apparatus same as the above. It is a perspective view of a plug. It is a side view of a plug. It is sectional drawing of the other example of an outlet apparatus same as the above. It is a partial front view of the outlet apparatus of other embodiment of this invention. It is a front view of an outlet apparatus same as the above. It is a side view which shows the other example of a dedicated plug. It is a side view of the outlet apparatus of further another embodiment of this invention. It is use explanatory drawing of an outlet apparatus same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Container 1a One surface 2 Electrical connection part 3 Blade receiving part 10a-10c Plug blade insertion hole 13 Locking piece (fixing part)
14b Peripheral wall part 32 Locking protrusion (Retaining part)
110 Plug 115 Lock piece (fixed part)
P Outlet device

Claims (3)

An electrical connection portion having a container body having a plug blade insertion hole on one side into which the plug blade of the plug is inserted, a blade receiving portion that contacts the plug blade inserted in the plug blade insertion hole, and a terminal portion connected to a power source And
The vessel body is provided with a plurality of fixing portions configured with fixing means for fixing the plug and a plurality of fixed portions provided on the plug,
The outlet device characterized in that the fixing means releases the plug when a force of a predetermined value or more is applied in a direction in which the plug and the body are separated from each other.   The outlet device according to claim 1, wherein a peripheral wall portion surrounding the plug is provided on the one surface side of the container body.   The outlet device according to claim 1 or 2, wherein the plurality of fixing portions are provided at positions that are point-symmetric with respect to a central axis of the plug.

Images