TWI438978B - Receptacle - Google Patents

Description

socket

The present invention relates to a receptacle capable of preventing a plug from coming loose.

A conventional socket which can prevent the plug from being loosened has been disclosed in, for example, Japanese Unexamined Patent Application Publication No. 2001-185289. In the above socket, when the plug of the plug is inserted into the plug-pin insertion port of the socket, the plug-pin receiving spring protrudes. It will engage the through-hole provided by the pin. Therefore, the plug can be prevented from coming loose from the socket.

In the above conventional socket, when the plug is rotated, a force is applied to the pin receiving spring to elastically extend the pin receiving spring. Therefore, when the number of times of connecting and separating the pins is increased, the force of the pin receiving spring for holding the pins is weakened. Therefore, it is difficult to ensure that the plug and the socket can be connected and separated considerably and the durability of the socket needs to be improved.

Based on the above, it is an object of the present invention to provide a socket that can improve its durability by ensuring that the plug and the socket can be connected and separated considerably.

The present invention provides a socket including a casing having a plug connection part for detachably connecting a plug having a plurality of circular pins and a peripheral wall surrounding the pins The plug connecting portion includes: a plurality of pin insertion holes for respectively inserting the pins, the pin insertion opening opening on the surface of the outer casing; an insertion groove for inserting the peripheral wall of the plug, inserting the groove a surface disposed on the outer casing; and a plurality of plug-pin receivers for inserting and electrically connecting the pins via the pin insertion holes, wherein the insertion groove is provided with a peripheral wall retaining portion (peripheral wall) Holding part) for holding the peripheral wall of the plug in a state where the peripheral wall is inserted into the insertion groove.

The peripheral wall holding portion described above may be disposed at an opposite position of the insertion groove in a state in which the pin insertion hole is interposed therebetween.

Alternatively, the peripheral wall holding portion described above may be disposed in a side wall surface of the insertion groove extending in a direction in which the pin insertion hooks are aligned.

Further, the portion surrounded by the insertion groove described above may be formed in a substantially quadrangular shape.

The peripheral wall retaining portion described above may be constituted by a recess provided in a side wall surface of the insertion groove for engaging with a claw disposed on a peripheral wall of the plug to prevent the plug from being loose from the socket Take off.

The recess described above can be disposed in the outer sidewall surface opposite the pin insertion bore.

A plurality of the plug connection portions described above may be provided; and a cable may be extended from the outer casing, the wires being electrically connected to the pin receivers respectively and having a plug at the front end of the wires.

The present invention provides a socket that can be improved in durability by ensuring that the plug and the socket can be connected and separated considerably.

In order to make the above features and advantages of the present invention more comprehensible, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

(First Embodiment)

The technical concept of the present invention will be described as a first embodiment by exemplifying a socket attached to an electric appliance with reference to FIGS. 1 to 7. The socket 1 of the first embodiment is suitable, for example, for supplying a direct current (DC) voltage to a socket of a communication device (so-called information socket), which is attached to a communication for accommodating, for example, a router or a hub. Rack of equipment (so-called information rack). International Electrotechnical Commission (IEC) standards will be used in Safety Extra Low Voltage (SELV) circuits, Extra Low Voltage (ELV) circuits, and Functional Extra Low Voltage (FELV). Circuits and the like are standardized as a power supply circuit that acts as a power source. In the present embodiment, a safety ultra low voltage (SELV) circuit is employed as a power supply circuit for supplying a direct current (DC) of 48 volts (V) to the socket 1. Hereinafter, the upper and lower and left and right directions will be defined according to the direction shown in FIG. 3A unless otherwise specified, and the upper and lower directions of FIG. 5 indicate the front and rear directions. These directions are defined for ease of explanation and do not necessarily correspond to the direction of the actual use state.

The socket 1 is provided with a casing 2 in the shape of a rectangular parallelepiped as shown in Figs. 1 and 2 . On a surface of the outer casing 2, a plurality of plug connection portions 3 (e.g., six portions of the illustrated example) for removably connecting the plugs 50 are provided. The electric wire 4 extends from one longitudinal end of the outer casing 2. The other plug 15 having the same structure as that of the plug 50 is connected to the front end portion of the electric wire. By connecting the plug 15 to another socket, direct current (DC) power can be supplied to the plug connection portion 3 via the electric wires 4, respectively. Please note that the wire 4 includes two power wires and one ground wire.

The outer casing 2 includes: a socket body 5 made of an insulating synthetic resin, which is substantially shaped like a box and has an opening on the upper side; and a terminal cover 6 made of synthetic resin to cover the socket body 5 A longitudinal end portion of the opening; and a cover 7, made of synthetic resin, covers the remainder of the opening of the socket body 5. On both longitudinal sides of the outer casing 2, through holes 12 for inserting screws are provided to secure the outer casing 2 to the aforementioned information frame.

For example, a cable connecting terminal (not shown) for connecting the electric wires 4 and composed of screw terminals is now housed in the housing space defined by the socket body 5 and the terminal cover 6.

Further, the plug connecting portions 3 disposed on the cover 7 are spaced apart from each other by a predetermined interval in the longitudinal direction. Each of the plug connecting portions 3 has three pin insertions 8a, 8b, and 8c opening to the surface (front surface 7a) of the cover 7, and each of the pins 52a, 52b, and 52c of the plug 50 is inserted for insertion The needle is inserted into the files 8a to 8c. Also, each of the plug connecting portions 3 has an insertion groove disposed at the front surface 7a of the cover 7 so as to be inserted around the pin insertions 8a to 8c to which the peripheral wall 53 of the plug 50 is to be inserted. Further, in the accommodation space defined by the socket body 5 and the cover 7, the contact parts that are electrically connected to the pins 52a to 52c inserted through the pin insertions 8a to 8c, respectively, have been accommodated (plugged in) Needle receivers) 11a to 11c. The contact portions 11a to 11c are electrically connected to the wire connection terminals, and supply direct current (DC) power to the contact portions 11a to 11c when the plug 15 is connected to a socket (not shown). Here, on the surface of the cover 7, a portion surrounded by the insertion groove 9 (hereinafter referred to as "plug receiving part 10") is formed into a substantially quadrangular shape when viewed from the front thereof. Here, the substantially square shape represents a shape of a square including a square or at least one corner thereof and having a beveled corner.

Meanwhile, the socket 1 of the present embodiment is suitable for a DC (DC) 48 volt (V) socket. The lower right corner and the lower left corner of the plug receiving portion 10 will be cut away from the oblique angle, and the insertion groove 9 is formed in accordance with the outer peripheral shape of the plug receiving portion 10. Please note that the International Electrotechnical Commission (IEC) standard specifies DC (DC) 6 volts (V), DC (DC) 12 volts (V), and DC (DC) 24 volts (V) as safe ultra low voltage (SELV) circuits. The voltage is the same as DC (DC) 48 volts (V) in the SELV circuit. In the socket 1, in order to recognize the voltage difference in appearance, the insertion groove 9 and the plug receiving portion 10 have different shapes according to their voltage values. Regarding the DC (DC) 6 volt (V) socket 1, as shown in FIG. 6A, the lower right corner of the plug receiving portion 10 will be chamfered to provide a slope 10a, and the shape of the insertion groove 9 formed corresponds to the plug. The outer peripheral shape of the receiving portion 10 is received. Further, with respect to the DC 1 (V) 12 volt (V) socket 1, as shown in Fig. 6B, the lower left corner of the plug receiving portion 10 will be chamfered to provide the slope 10a, and the shape of the insertion groove 9 formed corresponds to The outer peripheral shape of the plug receiving portion 10. Further, as shown in FIG. 6C, with respect to the direct current (DC) 24 volt (V) socket 1, no slope is disposed at the corner of the plug receiving portion 10, so that the plug receiving portion 10 has a substantially quadrangular (rectangular) shape, and The shape of the insertion groove 9 formed corresponds to the outer peripheral shape of the plug receiving portion 10.

Thus, a direct current (DC) 24 volt (V) socket 1 has a substantially rectangular shape when viewed from its front, and has direct current (DC) of 6 volts (V), 12 volts (V), and 48 volts (V). The socket 1 has a quadrangular shape in which at least one corner thereof is cut obliquely. Therefore, since the plug receiving portion 10 has different outer peripheral shapes according to different power supply voltages, the outer peripheral shape of the plug receiving portion 10 makes it easy to recognize the corresponding power supply voltage. Therefore, it is possible to avoid the unsuitability of the different power supply voltages for the plug 50 to be connected to the socket 1. Note that the outer peripheral shape of the plug receiving portion 10 is formed into a quadrangular shape (rectangular shape) in which at least one corner thereof is cut obliquely according to the power source voltage. Since the plug receiving portion 10 has no portion protruding outward from the rectangular periphery when viewed from the front thereof, the plug connecting portion 3 can be narrowed. Also, since the orientation of the plug 50 to be connected can be easily identified, the insertion operation can be improved. In the present embodiment, the plug receiving portion 10 has a different shape according to the voltage value by cutting the lower corner of the plug receiving portion 10 in accordance with the type of the power source voltage. However, the position or number of corners to be cut is not limited to the above. Further, the shape of the portion to be cut is not limited to the above. For example, as shown in FIG. 6D, the corner of the plug receiving portion 10 can be cut at substantially right angles to provide a recessed part 10b.

At the same time, each of the plug connecting portions 3 is provided with three pin insertions 8a to 8c which are open to the plug receiving portion 10. The two pin insertions 8a and 8b for respectively receiving the power pins 52a and 52b of the plug 50 are aligned in the left-right direction along the upper side of the plug receiving portion 10, and are positioned closer to the upper side of the plug receiving portion 10 Far below. And for receiving The pin insertion hole 8c of the ground pin 52c is disposed in the middle portion between the two pin insertion ports 8a and 8b in the left-right direction, and its position is closer to the lower side.

Further, on the outer side wall surface of the insertion groove 9 having the pin insertion jaws 8a to 8c interposed therebetween and opposed to each other in the left-right direction, recesses for respectively engaging the claws 56 formed on the peripheral wall 53 of the plug 50 are provided. Block 13. In other words, in a state where the peripheral wall 53 of the plug 50 is inserted into the insertion groove 9, the claws 56 respectively engaged with the recess 13 prevent the plug 50 from coming loose.

Next, the plug 50 for detachably connecting the socket 1 of the present embodiment will be described with reference to Figs. 1 to 5 . In the description of the plug 50, one side of the plug 50 pointing to the socket 1 when the plug 50 is connected to the socket 1 will be defined as "front" and the opposite side will be defined as "back".

The plug 50 includes a plug body 51 having a substantially rectangular parallelepiped shape that is sized to be held by a hand. The electric wire 60 connecting the plug body 51 and the electric device extends from the rear of the plug body 51. Note that the electric wires 60 are omitted in FIGS. 4 and 5.

On the front surface of the plug body 51, round pins 52a to 52c for inserting into the pin insertions 8a to 8c, respectively, are provided, and the pins 52a to 52c protrude forward. Here, the pins 52a and 52b are power supply pins serving as power supply electrodes, and the pins 52c are ground pins serving as ground electrodes. The peripheral wall 53 surrounding the pins 52a to 52c is disposed on the front surface of the plug body 51. The peripheral wall 53 projects forward more than the pins 52a to 52c, and has a substantially quadrangular shape corresponding to the insertion groove 9 of the socket 1 when viewed from the front.

Further, on the right side and the left side portion of the plug body 51, a lock is provided Lock pieces 55, each of which has a claw 56 for engaging a corresponding recess 13. The lock piece 55 is coupled to the front end portion of the peripheral wall 53, and the lock piece 55 is separated from the plug body 51 by slits 54 at portions other than the front end portion of the peripheral wall 53. The rear end portion of each of the locking pieces 55 is rotatable in the left-right direction as a fulcrum around the front end portion of the peripheral wall 53. Further, an operation piece 55a projecting outward in the left-right direction (the opposite direction to the center of the plug body 51) is disposed at the rear end portion of each of the locking pieces 55, and the claw 56 for engaging the recess 13 A portion of each of the locking pieces 55 corresponding to the recess 13 is disposed. Note that the claws 56 form a taper whose amount of protrusion is larger toward the back.

Next, the operation of connecting and disconnecting the plug 50 to the socket 1 of the first embodiment will be described below. As shown in FIGS. 1 and 5, when the user holds the plug 50 in the correct orientation and inserts the plug 50 into the plug connecting portion 3, the pins 52a to 52c are inserted into the pin insertions 8a to 8c, respectively, and the peripheral wall. 53 will be inserted into the insertion groove 9. The pins 52a to 52c are inserted into the inside of the casing 2 via the pin insertion ports 8a to 8c, and then connected to the respective contact portions 11a to 11c, respectively, to supply direct current (DC) power to the plug 50. Further, when the peripheral wall 53 is inserted into the insertion groove 9, the claw 56 is pushed toward the peripheral wall 53 so that the rear end side of the lock piece 55 is deformed inward in the left-right direction. When the tip end of the peripheral wall 53 is fully inserted into the insertion groove 9, the claws 56 will respectively engage with the recesses 13 disposed on the outer side wall surface of the insertion groove 9, while each of the locking pieces 55 is elastically restored by its elasticity. Extend outward in the left and right direction. At this time, the claws 56 of each of the locking pieces 55 are hooked to the rear surface of the front wall of the cover 7 to prevent the plug 50 from coming loose from the plug connecting portion 3. Therefore, the plug 50 can be left in the plug Block 1 in. Since the claws 56 are tapered, the claws 56 can be engaged with the recesses 13 by merely inserting the plug 50 without additional operations to maintain the connected state. Meanwhile, when the plug 50 is connected and separated from the socket 1, an arc may occur. In the case where the plug 50 is used to supply an alternating current (AC) voltage, the arc will extinguish when the supply voltage crosses zero volts, whereas in the case where the plug 50 is used to supply a direct current (DC) voltage, the arc may continue. In the plug 50 of the present embodiment, when the pins 52a to 52c are respectively connected to the contact portions 11a to 11c, the tip end of the peripheral wall 53 has been inserted into the insertion groove 9. Therefore, even if an arc occurs when the pins 52a to 52c are respectively connected to the contact portions 11a to 11c, the arc cannot be seen from the outside.

On the other hand, in the case where the plug 50 is separated from the socket 1, when the user pushes the right locking piece 55 and the operating portion 55a of the left locking piece 55 inward in the left-right direction so that each of the locking pieces 55 surrounds (the plug body 51) The front end portion of the cantilever is deformed (rotated) inward in the left-right direction as a fulcrum. When the lock piece 55 is deformed inward in the left-right direction, the claws 56 are respectively detached from the recess 13, whereby the release claw 56 is hooked to the state of the front wall of the cover 7 (the locked state). After releasing the locked state, the plug body 51 will be pulled away from the socket 1. Then, the peripheral wall 53 is detached from the insertion groove 9 and the pins 52a to 52c are detached from the pin insertions 8a to 8c, respectively, so that the plug 50 is separated from the socket 1. When the pins 52a to 52c are separated from the contact portions 11a to 11c, the tip end of the peripheral wall 53 is still inserted into the recess 9. Therefore, even if an arc occurs when the pins 52a to 52c are separated from the contact portions 11a to 11c, the arc cannot be seen from the outside.

In the socket 1 of the present embodiment, as described above, the insertion groove 9 is provided The peripheral wall holding portion is for the peripheral wall 53 to maintain the state in which the peripheral wall 53 of the plug 50 is inserted into the insertion groove 9. In other words, the recess 13 engaged with the claw 56 disposed on the peripheral wall 53 of the plug 50 will be disposed on the inner surface of the insertion groove 9 and the claws 56 will respectively engage the recess 13 to prevent the plug 50 from coming loose. Therefore, unintentional loosening of the plug 50 caused by, for example, accidental pulling of the electric wire 60 can be avoided. Further, unlike the conventional example described above, even if the number of times of connecting and separating the plugs is increased, there is no fear that the force for holding the pins 52a to 52c is weak. Therefore, it is possible to provide the socket 1 which is improved in durability by ensuring that the plug and the socket 1 can be connected and separated multiple times.

If the recesses 13 for respectively engaging the claws 56 are disposed on the upper and lower outer wall surfaces of the insertion recess 9, one of the plugs 50 connected to the plug connecting portions 3 adjacent to each other may interfere with the locking tabs of the other plugs. 55 operation. On the other hand, in the present embodiment, since the recess 13 is disposed on the left and right outer side wall surfaces of the insertion groove 9, the lock piece 55 can be easily operated even if the plug 50 is connected to the plug connecting portions 3 adjacent to each other. Further, the plug 50 can be more stably held in comparison with the case where the single locking piece 55 and the single recess 13 are engaged with each other so as to stably maintain the state in which the plug 50 is connected to the socket 1. Note that the recess 13 for engaging the claw 56 can be disposed in the left or right outer side wall surface of the insertion groove 9.

Further, if the plug connecting portions 3 adjacent to each other in the up and down direction are separated by a sufficient distance, as shown in FIG. 7, only one recess 13 can be disposed on the upper outer side wall surface of the insertion groove 9 or under the insertion groove 9. In the outer sidewall surface. In the case where the locking piece 55 and the recess 13 are engaged with each other at two points, respectively, when the plug 50 is separated from the socket 1, it is necessary to simultaneously operate the two locking pieces 55. anti- Since the lock piece 55 and the recess 13 are engaged with each other only at one point, operability can be improved. Also, since the one recess 13 located on the upper outer side wall surface of the insertion groove 9 is disposed at an intermediate portion between the two power supply pins 52a and 52b, the plug 50 is firmly held in the socket 1. If the recess 13 is only disposed in the lower outer side wall surface of the insertion groove 9, which will be the lower side of the plug receiving portion 10 in the use state, the locking piece 55 of the plug 50 will be located on the lower side. Therefore, the locking piece 55 is made inconspicuous and the appearance of the plug 50 can be improved.

Further, the portion surrounded by the insertion groove 9 forms a substantially quadrangular shape. This makes it easier to form the insertion groove 9 and the recess 13 as compared with the case where the portion surrounded by the insertion groove 9 forms a complicated shape. Further, it is easy to visually recognize the orientation of the plug 50 to be connected.

At the same time, according to the voltage value of the present embodiment, the plug receiving portion 10 has a different shape when viewed from the front. Therefore, the width "D1" (see Fig. 3A) of the outer side wall surface of the insertion groove 9 in which the recess 13 is disposed varies depending on whether or not the slope 10a formed in the plug receiving portion 10 is present. Here, in the case where the inclined surface 10a is provided, the width "D2" of the recess 13 is designed to be smaller than the width "D1" of the outer side wall surface of the insertion groove 9. Therefore, the recess 13 and the locking piece 55 are generally applicable to all of the plug connecting portions 3 of the insertion grooves 9 having different shapes.

Further, in the present embodiment, the recess 13 for engaging the claw 56 is provided by forming an opening on the outer side wall surface of the insertion groove 9. Therefore, since the recess 13 is provided only by forming the opening on the outer side wall surface of the insertion groove 9, it is easy to manufacture the socket 1. Inserted in order to form the recess 13 In the case where the inner side wall surface of the recess 9 (i.e., the side wall surface of the plug receiving portion 10) is opened, the claw 56 should be prevented from interfering with the contact portions 11a to 11c located inside the plug receiving portion 10. However, in the present embodiment, the opening is disposed on the outer side wall surface of the insertion groove 9, opposite to the side wall surface of the plug receiving portion 10, that is, opposite to the contact portions 11a to 11c. Therefore, it is not necessary to design to prevent the claw 56 from interfering with the contact portions 11a to 11c, and thus it is easy to manufacture the socket 1.

Further, the portion of the recess 13 to be hooked by the claw 56 forms a double-step shape, the structure of which is: a step 13a which is closer to the insertion groove 9; and a step 13b which is located behind the step 13a (see the figure). 5). In the case where the recess 13 is formed in a single-step shape, as shown by the broken line 13c of FIG. 5, the thickness of the mold to be inserted from the rear side of FIG. 5 for forming the recess 13 is reduced, and thus the strength of the mold is disadvantageously deterioration. On the other hand, in the case where the recess 13 forms a double-step shape, the mold to be inserted from the back of Fig. 5 will have a sufficient thickness, so that the mold will have higher strength and a longer life.

(Second embodiment)

The second embodiment will be described with reference to Figs. 8A and 8B. The same reference numerals will be assigned to the same common elements as the first embodiment, the unnecessary description thereof will be omitted, and the features of the second embodiment will be mainly explained.

In the present embodiment, as shown in FIGS. 8A and 8B, the inner side wall surface of the insertion groove 9 (i.e., the inner side wall surface of the plug receiving portion 10) will be partially recessed to be formed to respectively engage the claw 56. The recess 14 is. In the plug 50 to which the socket 1 is to be connected, the lock piece 55 supported by the plug body 51 is provided at its intermediate portion in the front-rear direction. In addition, the claws 56 are disposed on each of the locking pieces 55. The front end side, and the operating member 55a is disposed on the rear end side thereof. When the user pushes the right operating member 55a and the left operating member 55a inward in the left-right direction, the front end portion of the locking piece 55 is rotated outward in the left-right direction with the intermediate portion in the front-rear direction as a fulcrum. Also, when the user releases his/her hand by the operating member 55a, the front end portion of each of the locking pieces 55 will be restored to its original state by the elastic restoring force of the locking piece 55.

When the user inserts the plug 50 into the plug connecting portion 3 in the correct direction, the peripheral wall 53 is inserted into the insertion groove 9 so that the pins 52a to 52c are respectively inserted into their corresponding pin insertions 8a to 8c. The pins 52a to 52c inserted into the outer casing 2 via the pin insertion ports 8a to 8c, respectively, will be connected to their corresponding contact portions 11a to 11c, and then supply direct current (DC) power to the plug 50. Further, when the tip end of the peripheral wall 53 is inserted into the insertion groove 9, the claw 56 is pushed toward the peripheral wall 53 so that the front end side of the lock piece 55 is deformed outward in the left-right direction. When the tip end of the peripheral wall 53 is fully inserted into the insertion groove 9, the claws 56 will respectively enter the recesses 14 disposed on the inner side wall surface of the insertion groove 9. Then, the tip end portion of each of the locking pieces 55 is moved inward in the left-right direction by the elastic restoring force of the locking piece 55, and the claws 56 are engaged with the recess 14. At this time, by hooking the claw 56 to the edge of the recess 14, the plug 50 can be prevented from being released from the socket 1 to maintain the connected state. Since the claws 56 are tapered, the claws 56 can be held in a connected state only by inserting the plug 50 without additional manipulation to engage the claws 56 with the recesses 14.

On the other hand, in the case where the plug 50 is separated from the socket 1, when the user pushes the right locking piece 55 and the operating portion 55a of the left locking piece 55 inward in the left-right direction to be inward, the front end portion of the locking piece 55 will surround the front-rear direction. Middle part Deformed outward (pivot) in the left and right direction as a fulcrum. When the front end portion of each of the locking pieces 55 is outwardly deformed in the left-right direction, the claws 56 are disengaged from the recess 14 to release the state in which the claws 56 are engaged with the recesses 14 (the locked state). After the locked state is released, if the plug body 51 is pulled in a direction away from the socket 1, the peripheral wall 53 will be detached from the insertion groove 9, while the pins 52a to 52c are detached from the pin insertions 8a to 8c, respectively. Therefore, the plug 50 is pulled out from the socket 1.

A recess 14 for engaging the claw 56 is disposed on the inner side wall surface of the insertion groove 9 on the side of the plug receiving portion 10. However, the recess 14 is partially pressed into the inner side wall surface so that an opening cannot be formed via the inner side wall. Therefore, there is no fear that the claws 56 interfere with the respective contact portions 11a to 11c.

(Third embodiment)

A socket attached to an electric appliance is exemplified in the first and second embodiments. Hereinafter, a socket attached to a mounting surface (for example, a wall) will be described as an embodiment of the present invention.

Figure 9 is a front elevational view of the socket 20 secured to the mounting surface. The socket 20 is designed to have a size in accordance with Japanese Industrial Standards (see JIS C 8303) and its housing 21 size (single module size) allows three sockets having this single module size to be accommodated in a large rectangular string wiring. Mounting bracket for accessories (see JIS C 8375). The plug connecting portion 3 described in the first and second embodiments is disposed on the front surface of the outer casing 21. Since the structure of the plug connecting portion 3 is the same as that of the first and second embodiments, like reference numerals will be assigned to the same elements as the first and second embodiments, and unnecessary description thereof will be omitted. Reference numeral 30 of Figure 9 indicates attachment to a large rectangular string fitting. A decorative plate on the front surface of the mounting bracket. The functional surface of the socket 20 in which the plug connection portion 3 is disposed is exposed via an aperture 31 of the trim panel 30.

In the socket 20 of the present embodiment, the recesses 13 for respectively engaging the claws 56 disposed on the peripheral wall 53 of the plug 50 are disposed on the outer side wall surface of the insertion groove 9. The jaws 56 are respectively engaged with the recess 13 to prevent the plug 50 from being detached from the socket 20. Unlike the conventional socket, even if the number of times the pins are connected and separated is increased, there is no fear that the force for holding the pins 52a to 52c is weak. Accordingly, the socket 20 is provided which is improved in durability by ensuring that the plug and the socket 20 can be connected and separated considerably.

In the first to third embodiments, the socket fixed to the device (information frame) and the mounting surface has been described. However, the technical concept of the present invention can be applied to, for example, a socket of a multi-socket placed on the floor or suspended for use.

Further, in the above embodiment, the socket which can be connected to the plug 50 having the pin 52c as the ground electrode has been described. However, the present invention is applicable to a socket that does not have the pin insertion port 8c and the contact portion 11c.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

1,20. . . socket

2, 21. . . shell

3. . . Plug connection

4, 60. . . wire

5. . . Socket body

6. . . Terminal cover

7. . . cover

7a. . . Front surface of cover 7

8a, 8b, 8c. . . Pin insertion埠

9. . . Insert groove

10. . . Plug receiving part

10a. . . Bevel

10b. . . Sag part

11a, 11b, 11c. . . Contact part

12. . . Through hole

13, 14. . . Recess

13a, 13b. . . Order

13c. . . a dotted line representing a single-order shape

15, 50. . . plug

30. . . Decorative plates

31. . . Aperture

51. . . Plug body

52a, 52b, 52c. . . Pin

53. . . Peripheral wall

54. . . Slit

55. . . Locking plate

55a. . . Operating part

56. . . claw

D1. . . The width of the outer side wall surface of the insertion groove 9

D2. . . The width of the recess 13

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a socket and a plug in accordance with a first embodiment of the present invention.

Figure 2 is a perspective view showing a state in which the plug is connected to the socket of the first embodiment.

Fig. 3A is an enlarged front view of a main portion of the socket of the first embodiment, and Fig. 3B is an enlarged perspective view of the main portion.

Figure 4 is a front elevational view showing the state in which the plug is connected to the socket of the first embodiment.

Figure 5 is a cross-sectional view taken along line A-A of Figure 4, showing the state before the plug is connected to the socket of the first embodiment.

6A to 6D are front views of a main portion of a modification of the first embodiment.

Fig. 7 is a front elevational view of the main part of another modification of the first embodiment.

Fig. 8A is a front view of a main portion of a socket in accordance with a second embodiment of the present invention, and Fig. 8B is a cross-sectional view showing a state in which the plug is connected to the socket.

Figure 9 is a front elevational view of a socket in accordance with a third embodiment of the present invention.

1. . . socket

2. . . shell

3. . . Plug connection

5. . . Socket body

7. . . cover

8a, 8b, 8c. . . Pin insertion埠

9. . . Insert groove

10. . . Plug receiving part

11a, 11b, 11c. . . Contact part

12. . . Through hole

13, 14. . . Recess

50. . . plug

51. . . Plug body

52a, 52b, 52c. . . Pin

53. . . Peripheral wall

54. . . Slit

55. . . Locking plate

55a. . . Operating part

56. . . claw

60. . . wire

Claims (9)

A socket comprising a housing, the housing comprising a plug connection portion for removably connecting a plug, the plug having a plurality of pins and a peripheral wall surrounding the pins, wherein the plug connection portion comprises: a plurality of a pin insertion opening opening into the surface of the outer casing for respectively inserting the pin; an insertion groove disposed in the surface of the outer casing for inserting the peripheral wall of the plug; a plurality of pin receivers for inserting and electrically connecting the pins via the pin insertion holes, respectively, and wherein the insertion grooves are provided with at least one peripheral wall holding portion for the periphery The peripheral wall of the plug is held in a state in which the wall is inserted into the insertion groove, wherein the peripheral wall protrudes further forward than the pin, and wherein the width of the insertion groove is set to be The peripheral wall is allowed to deform when the plug is detached from the socket. The socket according to claim 1, wherein the peripheral wall holding portion is disposed at an opposite position of the insertion groove in a state in which the pin insertion hole is interposed therebetween. The socket of claim 1, wherein the peripheral wall holding portion is disposed on a side wall surface of the insertion groove extending in a direction in which the pin insertion jaws are aligned. Insertion as described in any one of claims 1 to 3 a seat in which a portion surrounded by the insertion groove is formed in a substantially quadrangular shape. The socket according to any one of claims 1 to 3, wherein the peripheral wall holding portion is constituted by a recess disposed on a surface of the side wall of the insertion groove, the recess Used to engage a pawl disposed on the peripheral wall of the plug to prevent the plug from being detached from the socket. The socket of claim 5, wherein the recess is disposed in an outer sidewall surface of the insertion groove opposite to the pin insertion pocket. A socket according to any one of claims 1 to 3, wherein a plurality of said plug connection portions are provided; and an electric wire is extended from said outer casing, said electric wires being electrically connected to said pin respectively And having a plug at the front end of the wire. The socket of claim 5, wherein the recess is disposed on an inner sidewall surface of the insertion groove. The socket of claim 8, wherein the plug has a locking piece, wherein the claw is disposed on a front end side of the locking piece, and an operating member is disposed on a rear end side of the locking piece, The front end side of the locking piece pivots outward based on an operation of the operating member.