JP2014072131A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector that can be locked only by a simple fitting operation and is not unlocked even by shock or vibration.SOLUTION: A connector is constituted by a receptacle comprising a housing-shaped plug and a pair of rail-like side faces. The plug is provided with a protrusion on its outer face. The receptacle comprises: a lever that is opposed adjacent to a receptacle side face, whose plug connection direction end is fixed to the receptacle side face, and whose plug detachment direction end projects and extends from the receptacle side face; and a claw formed above the lever to cover the lever via a gap. The lever comprises: a lever tip formed on its plug detachment direction end; and a step formed so that the lever tip side is an upper stage part and the plug connection direction end side is a lower stage part. In a process of fitting the plug and the receptacle, the protrusion presses down the lever tip, and therefore, the vertical direction width of a gap between the upper stage part and a lower face of the claw is enlarged to be equal to or more than the vertical direction width of the protrusion.

Description

  The present invention relates to a connector comprising a plug and a receptacle.

  In conventional connectors, when the plug and receptacle are mated, the operator holds the plug with his / her finger, aligns it with the receptacle, inserts the plug into the receptacle, and then changes the plug from the metal frame to the receptacle. The metal frame has to be rotated or slid to cover the plug with the metal frame to lock the plug (for example, Patent Document 1).

  Also, with conventional connectors, the operator can hold the plug and simply insert (insert) it into the receptacle, so that the elastic lock claw provided on the receptacle can prevent the connector from pulling upward. There are also some (for example, patent document 2).

JP 2012-164488 A JP 2011-243415 A

  In the connector of Patent Document 1, it takes time to fit the connector. On the other hand, in the connector of Patent Document 2, the plug is always pressed upward by being pushed up to the contact of the receptacle in the fitted state, and the lock claw is elastically deformed even by a slight impact / vibration and the lock is locked. It is released and the plug comes off. Therefore, an object of the present invention is to provide a connector that can be locked only by a simple fitting operation and cannot be unlocked by impact or vibration.

  The connector of the present invention includes a receptacle having a housing-shaped plug and a pair of rail-shaped side surfaces.

  The plug has a protrusion on its outer surface, the receptacle is close to and opposed to the side surface of the receptacle, the plug connection direction end is fixed to the receptacle side, and the plug escape direction end is projected and extended from the receptacle side; A claw formed so as to cover the lever is provided above the lever through a gap.

  The lever includes a lever tip formed at an end portion in the plug withdrawal direction, and a step formed with the upper surface on the lever tip portion side as an upper step portion and the upper surface on the plug connection direction end portion side of the lever as a lower step portion.

  In the process of fitting the plug and the receptacle, the projection pushes down the tip of the lever so that the vertical width of the gap provided between the upper step portion and the lower surface of the claw is equal to or equal to the vertical width of the projection. In the state where the lever is elastically restored upward, the vertical width of the gap provided between the lower surface of the claw and the lower step is equal to or greater than the vertical width of the protrusion. It is characterized by becoming.

  According to the connector of the present invention, it can be locked only by a simple fitting operation, and the lock is not released even by impact or vibration.

The disassembled perspective view of the plug of Example 1 seen from diagonally upward direction. The disassembled perspective view of the plug of Example 1 seen from diagonally downward. FIG. 3 is a perspective view illustrating an appearance of a plug according to the first embodiment. FIG. 3 is a perspective view illustrating an appearance of the receptacle according to the first embodiment. The perspective view which shows the fitting state of the plug and receptacle of Example 1. FIG. The figure shown about the operation | movement at the time of the fitting of the plug of Example 1 and a receptacle. The enlarged view of the engagement position in the state in which the protrusion of the connector of Example 1, the lever, and the nail | claw were mutually engaged.

  Hereinafter, embodiments of the present invention will be described in detail. In addition, the same number is attached | subjected to the structure part which has the same function, and duplication description is abbreviate | omitted.

  Hereinafter, with reference to FIGS. 1 to 3, a plug constituting the connector according to Embodiment 1 of the present invention will be described. FIG. 1 is an exploded perspective view of the plug 100 according to the present embodiment as viewed obliquely from above. FIG. 2 is an exploded perspective view of the plug 100 of the present embodiment as viewed obliquely from below. FIG. 3 is a perspective view showing the appearance of the plug 100 of this embodiment.

  As shown in FIG. 1, the plug 100 according to the present embodiment includes a cover 10, a base 20, a cable bundle 30, a cable bundle 40, and a cable case 50. The cover 10 is made of metal, for example, and includes a rectangular upper surface portion 11. Both ends of the upper surface portion 11 in the short direction are stretched and bent at a right angle to form a side surface portion 12 that is opposed to the upper surface portion 11. One end in the longitudinal direction of the upper surface portion 11 is projected and extended from the upper surface portion 11 in the longitudinal direction, and an upper surface 17 of the cable housing portion is formed to protrude. The cable housing portion upper surface 17 includes a cable housing portion side surface 18 formed by extending in the short direction of the cover 10 and bending it at a right angle.

  A rectangular notch 15 having a width that is approximately half the height of the side surface 12 in the height direction is formed at a substantially central lower end of the side surface 12. In the vicinity of the center of the side surface 12 in the height direction, in the longitudinal direction of the side surface portion 12, rectangular convex portions 14 a and 14 b that protrude toward the outside of the cover 10, rectangular concave portions 13 a and 13 b that protrude toward the inner lumen of the cover 10, 13c is formed. These rectangular convex portions and rectangular concave portions are formed by pressing or the like, and when formed as convex portions when viewed from the surface, they are concave when viewed from the back side, and conversely formed as concave portions when viewed from the surface. In this case, it is a convex portion when viewed from the back side. These rectangular convex portions, cutout portions, and rectangular concave portions are arranged in the order of the rectangular convex portion 14b, the rectangular concave portion 13c, the rectangular convex portion 14a, the cutout portion 15, the rectangular concave portion 13b, and the rectangular concave portion 13a from the side closer to the cable housing side surface 18. It is formed to become. Further, the side surface 12 is extended in the longitudinal direction of the cover in the vicinity of the center in the height direction of one end of the side surface 12 near the side surface 18 of the cable housing, and is bent at a substantially right angle toward the outside of the cover 10 to form a rectangular plate-shaped protrusion 16. Is formed. Further, as shown in FIG. 3, the side surface portion 12 is extended in the longitudinal direction of the cover in the vicinity of the center in the height direction of one end of the side surface portion 12 far from the cable housing side surface 18, and is bent at a substantially right angle toward the inner side of the cover 10. In addition, a soldering terminal 19 is formed by extending and bending the further bent tip vertically downward.

  As shown in FIG. 1, the base 20 is a square plate. Two oblong terminal insertion holes 21 are formed at one end of the upper surface of the base 20 in the longitudinal direction, and are formed in a row in the short direction of the base 20 so that the short diameter direction is the longitudinal direction of the base 20. A rectangular groove 22 is formed on the substantially central side surface of the base 20 in the longitudinal direction so that the width in the longitudinal direction is substantially equal to the notch 15 described above.

The cables of the cable bundle 30 are arranged close to each other in a line in the short direction of the base 20. The cables of the cable bundle 30 are arranged so that the cable tips 31 are aligned in the longitudinal direction and are located near the center of the upper surface of the base 20. At the cable tip 31 of the cable bundle 30, the insulation coating is peeled off, and the exposed cable core is soldered and connected to a cable connection terminal (not shown) on the upper surface of the base 20. The cable bundle 30 is, for example, an AWG 30 simple line, an AWG 32-38 simple line with a shield, an AWG 34 thin coaxial line, or the like. In addition, an optical fiber can be used instead of the thin coaxial line. As shown in FIG. 2, the first terminals are arranged in a row in the short direction of the board, near the end where the terminal insertion holes 21 are formed on the lower surface of the board 20. A row 23a is formed. In addition, a second terminal row 23b is formed in one row in the short-side direction of the substrate in parallel with the first terminal row 23a and close to the first terminal row 23a. These first and second terminal rows 23a and 23b are brought into contact with a first plug connection terminal row 83a and a second plug connection terminal row 83b of a receptacle contact 80, which will be described later, and conduct electrical signals.

  Each cable of the cable bundle 40 is arranged close to each other in a row in the short direction of the base 20. The cables of the cable bundle 40 are arranged so that the cable tips 41 are aligned in the longitudinal direction and are located near the center of the lower surface of the base 20. At the cable tip 41 of the cable bundle 40, the insulation coating is peeled off, and the exposed cable core is soldered and connected to a cable connection terminal (not shown) on the lower surface of the base board 20. The cable bundle 40 is bundled with the cable bundle 30. The cable bundle 40 is, for example, an AWG 44 thin coaxial line.

  As shown in FIG. 1, the cable case 50 is made of, for example, metal and includes a square bottom plate portion 51. Both ends of the bottom plate portion 51 in a direction perpendicular to the cable extension direction are extended, and are provided with side portions 52 that are bent at a right angle so as to face each other. One end of the bottom plate portion 51 in the cable extending direction is projected and extended from the bottom plate portion 51 in the cable extending direction to form a cable housing portion lower surface 57. The cable housing portion lower surface 57 includes a cable housing portion side surface 58 that extends horizontally in a direction perpendicular to the cable extension direction and is bent at a right angle so as to face the cable housing portion.

  In the vicinity of the center of the side surface portion 52 in the height direction, rectangular holes 54 a and 54 b having inner portions that are substantially equal to the outer periphery of the rectangular convex portion described above are formed in a line in the longitudinal direction of the side surface portion 52. The rectangular holes are formed in the order of the rectangular hole 54b and the rectangular hole 54a from the side close to the cable housing portion side surface 58.

  Next, assembly of the plug 100 will be described with reference to FIG. The rectangular convex portion 14 a of the cover 10 is fitted into the rectangular hole 54 a of the cable case 50. Similarly, the rectangular convex portion 14 b of the cover 10 is fitted into the rectangular hole 54 b of the cable case 50. At this time, the protrusion 16 provided in the cover 10 protrudes toward the outside of the cable case from a gap formed between the side surface portion 52 of the cable case 50 and the cable housing portion side surface 58. Further, the cable housing portion side surface 58 is overlapped so as to include the cable housing portion side surface 18. The overlapped side surfaces (18, 58), the cable housing upper surface 17 and the cable housing lower surface 57 are integrated to form a sleeve having a rectangular cross section. The cable bundles 30 and 40 described above are accommodated together in the sleeve lumen. In this way, the cover 10 and the cable case 50 are assembled.

  On the other hand, the soldering terminals 19 of the cover 10 are inserted into the terminal insertion holes 21 of the base 20 from the upper surface side of the base 20 and are soldered and bonded. The upper surface and side surfaces of the base 20 are accommodated in the lumen of the cover 10. At this time, the upper surface of the base 20 comes into contact with the lower ends of the rectangular recesses 13a, 13b, and 13c protruding toward the lumen of the cover 10 to prevent deep penetration of the base 20 into the cover 10 lumen. A predetermined space is secured in the cavity. In this space, a part including the cable tip 31 of the cable bundle 30 is accommodated. At this time, the cutout portion 15 of the cover 10 and the groove portion 22 of the base 20 are arranged at positions that overlap each other. Accordingly, the groove portion 22 of the base 20 is exposed from the side surface 12 of the cover 10 through the notch portion 15. In this way, the parts are assembled to form a plug 100 having a substantially housing shape as shown in FIG.

  Next, the receptacle constituting the connector according to Embodiment 1 of the present invention will be described with reference to FIG. FIG. 4 is a perspective view showing the appearance of the receptacle 200 of this embodiment. In the description of the receptacle 200, the plug tip direction when the connector is fitted is referred to as a plug connection direction, and the direction opposite to the plug tip direction is referred to as a plug escape direction. As shown in FIG. 4, the receptacle 200 is formed by combining a plug housing case 60, a body 70, and contacts 80.

  The plug housing case 60 can be made of metal, for example. The plug housing case 60 includes a guide rail 62, an upper surface portion 61, and a lever 64. The guide rails 62 are a pair of substantially strip-shaped (rail-shaped) plate pieces arranged substantially in parallel. The upper surface of the end portion in the plug connection direction of the guide rail 62 is connected by extending in the inner direction of the plug housing case 60 to form an upper surface portion 61 having a rectangular bowl shape. The upper surface part 61 is provided with a hook-shaped guide frame 61-1 which is raised obliquely upward at one end of the plug escape direction.

  Furthermore, the guide rail 62 includes a hook-shaped claw 68 formed by extending the upper surface of the guide rail 62 in the inner direction of the plug housing case 60 from the vicinity of the center in the longitudinal direction to the upper surface portion 61. At one end of the claw 68 in the plug escape direction, the claw 68 is further extended inwardly of the plug housing case 60 and is bent at a substantially right angle vertically downward to form a positioning portion 63. When the plug 100 and the receptacle 200 are in the fitted state, the positioning portion 63 is fitted with the groove portion 22 of the plug 100 described above. Accordingly, the positioning part 63 has a size slightly smaller than the inner part of the groove part 22 described above.

  A region surrounded by the upper surface portion 61, the pair of guide rails 62, and the claws 68 is referred to as a case lumen 69, and a body 70 and a contact 80 described later are accommodated in the case lumen 69.

  Further, the guide rail 62 includes a hook-shaped claw 65 formed by extending the upper surface of the end portion of the plug escape direction inward of the plug housing case 60. Further, the guide rail 62 includes a soldering terminal 66 formed by extending the plug escape direction end portion and the lower surface of the plug connection direction end portion inward of the plug housing case 60. Further, the guide rail 62 includes a plug placement base 67 formed by extending a lower surface close to the soldering terminal 66 and close to the end portion in the plug removal direction inward of the plug housing case 60. The plug placement table 67 is formed by being slightly lifted vertically upward from the soldering terminal 66. The plug 100 described above is placed on the upper surface of the plug placing table 67 and appropriately positioned in the vertical direction so that the plug 100 and the receptacle 200 are in good contact with each other.

  Further, a pair of substantially strip-shaped levers 64 are formed so as to be close to and opposed to each inner side surface of the guide rail 62 and substantially parallel to the guide rail 62. The plug connection direction end of the lever 64 is connected to the guide rail 62 on the upper surface near the longitudinal center of the guide rail 62. The plug withdrawal direction end of the lever 64 protrudes and extends from the plug withdrawal direction end of the guide rail 62 to form a lever tip 64-1. Since the lever 64 is connected and fixed to the guide rail 62 only at the plug connection direction end, if the lever tip 64-1 is pressed from above, the lever 64 is elastically deformed, whereby the lever tip 64. -1 sinks slightly downward. When the upward pressing is lost, the lever tip 64-1 returns upward due to the elastic force of the lever 64. Similarly, if the lever tip 64-1 is pressed from the lateral direction, the lever tip 64-1 is elastically deformed in that direction, and returns to its original position when there is no more pressure from the lateral direction.

  The upper surface of the lever 64 is slightly cut out in the vertical direction in the middle in the longitudinal direction, the lever tip 64-1 side is the upper step portion 64-2, and the lever middle side (plug connection direction end side) is the lower step. A step serving as a portion 64-3 is formed. At this time, the claw 65 described above is positioned above the lever 64 so as to cover the upper step portion 64-2 and the lower step portion 64-3, and the lower surface of the claw 65 and the upper step portion 64-2 are slightly spaced from each other. Is facing through. Similarly, the lower surface of the claw 65 and the lower step portion 64-3 are slightly opposed to each other with a gap. When the lever 64 is not pressed, the vertical width of the gap provided between the lower surface of the claw 65 and the upper step portion 64-2 is smaller than the vertical width of the protrusion 16 described above. The vertical width of the gap provided between the portion 64-3 is about the same as or slightly larger than the vertical width of the protrusion 16 described above. On the other hand, if the lever 64 is pressed vertically downward, the lever tip 64-1 slightly sinks downward, and the vertical direction of the gap provided between the lower surface of the claw 65 and the upper step portion 64-2. The width is expanded to the same level as or more than the vertical width of the protrusion 16 described above.

  The body 70 has a substantially square shape, and can be made of, for example, a resin. The body 70 includes a plurality of grooves having a plug connection-escape direction as a longitudinal direction from a substantially central portion of the upper surface of the body 70 to an end portion in the plug connection direction. One groove row 71 is provided with the grooves arranged in a row in the short direction. Similarly, a second groove row 72 composed of a plurality of grooves whose longitudinal direction is the plug connection-escape direction extends from the substantially central portion of the upper surface of the body 70 to the end portion of the plug escape direction. Is provided.

  The contact 80 is press-fitted and attached to each groove of the first movable terminal row 81 composed of a plurality of movable terminals press-fitted and attached to each groove of the first groove row 71 described above. And a second movable terminal row 82 composed of a plurality of movable terminals. Each movable terminal of the first movable terminal row 81 has a needle shape, and includes a base connection terminal row at the plug connection direction end and a first plug connection terminal row 83a at the plug escape direction end. Since the first movable terminal row 81 is press-fitted and fixed to the body 70 in a state where it rises obliquely upward from the plug connection direction end, the first plug connection terminal row 83a protrudes slightly above the upper surface of the body 70. The first terminal row 23a of the plug 100 described above is connected well and conducts an electric signal. Similarly, each movable terminal of the second movable terminal row 82 has a needle shape, and is provided with a base connection terminal row at an end portion in the plug escape direction and a second plug connection terminal row 83b at an end portion in the plug connection direction. Since the second movable terminal row 82 is press-fitted and fixed to the body 70 in a state where it rises obliquely upward from the end of the plug escape direction, the second plug connection terminal row 83b protrudes slightly above the upper surface of the body 70. The second terminal row 23b of the plug 100 described above is satisfactorily connected to conduct an electrical signal. The first plug connection terminal row 83 a and the second plug connection terminal row 83 b are spaced apart from each other by a predetermined distance in the longitudinal direction, and both are disposed facing each other near the approximate center of the body 70.

  Next, with reference to FIGS. 5 to 7, the attachment of the receptacle 200 of this embodiment to the base 300 and the fitting operation of the plug 100 and the receptacle 200 of this embodiment will be described. FIG. 5 is a perspective view showing a fitting state of the plug 100 and the receptacle 200 of this embodiment. FIG. 6 is a diagram illustrating an operation when the plug 100 and the receptacle 200 according to this embodiment are fitted. 6A shows a state immediately before the plug 100 is inserted into the receptacle 200, FIG. 6B shows a state in which the tip of the base 20 of the plug 100 is inserted into the case lumen 69 of the receptacle 200, and FIG. 6D shows a state in which the protrusion 16 provided in the plug 100 pushes down the lever tip 64-1, and FIG. 6D shows the plug 100 in the lateral direction (plug connection direction) from the state of FIG. ) And the lever 64, the protrusion 16, and the claw 65 are engaged with each other. FIG. 7 is an enlarged view of the engaging position in a state where the protrusion 16, the lever 64, and the claw 65 of the connector of this embodiment are engaged with each other.

  As shown in FIG. 5, the lower surface of the soldering terminal 66 of the receptacle 200 is mounted by being soldered and fixed to the upper surface of the substrate 300. At this time, the board connection terminal rows of the first and second movable terminal rows 81 and 82 described above are soldered and fixed to the terminal pattern formed on the upper surface of the board 300. Further, the lower portion of the plug 100 is accommodated in the case lumen 69 of the receptacle 200 in the fitted state.

  Next, the fitting operation between the plug 100 and the receptacle 200 will be described. As shown by the arrow in FIG. 6A, the base 20 end on the side where the terminal insertion hole 21 is formed is the front end, and the front end of the base 20 is inserted into the case lumen 69 obliquely upward (state of FIG. 6B). Next, as shown by the arrow in FIG. 6B, the plug 100 is rotated downward with the tip of the base 20 as the center of rotation until the plug 100 and the base 300 are substantially parallel. In this process, the lower surface of the protrusion 16 provided on the plug 100 is in contact with the upper surface of the lever tip 64-1, and a predetermined pressure is applied to the contact point vertically downward. As a result, the lever front end portion 64-1 slightly sinks downward, and the vertical width of the gap provided between the lower surface of the claw 65 and the upper step portion 64-2 is slightly expanded (state shown in FIG. 6C). Next, as shown by the arrow in FIG. 6C, by sliding the plug 100 in the plug connection direction, the protrusion 16 slides in the plug connection direction along with the plug 100, and the protrusion 16 is connected to the lower surface of the claw 65 and the upper stage. It passes through a gap provided between the portion 64-2. In the process in which the protrusion 16 slides in the plug connection direction, if the protrusion 16 passes through the step (the boundary between the upper step portion 64-2 and the lower step portion 64-3), the protrusion 16 falls to the lower step portion 64-3, and thus in the vertically downward direction. The applied lever 64 is no longer pressed, and the lever tip 64-1 returns elastically in the vertically upward direction (state shown in FIG. 6D).

  FIG. 7 is an enlarged view of the vicinity of the engagement position of the protrusion 16, the lever 64, and the claw 65, showing only the cover 10 and the plug housing case 60 in the engaged state of FIG. 6D. FIG. 7A is an enlarged view showing only the cover 10. FIG. 7B is an enlarged view showing only the cover 10 and the plug housing case 60. As shown in FIG. 7B, the upper surface and the lower surface of the protrusion 16 are sandwiched between the lower surface of the claw 65 and the lower step portion 64-3 of the lever 64, thereby preventing the plug 100 from coming off upward. The Further, the side surface of the protrusion 16 in the plug escape direction is engaged and fixed by the stepped-up portion of the step formed by the upper step portion 64-2 and the lower step portion 64-3 of the lever 64, whereby the horizontal direction of the plug 100 (plug escape direction). ) Is prevented.

  In addition, since the tip of the base 20 of the plug 100 is inserted into the case lumen 69, the upper surface portion 61 formed in a bowl shape prevents the plug 100 from coming off upward. Further, the guide rail 62 prevents the plug 100 from shifting in the horizontal direction. Furthermore, since the positioning part 63 of the receptacle 200 and the groove part 22 of the plug 100 are fitted, the positioning part 63 functions as a guide for positioning when the plug is inserted.

  Moreover, since the plug 100 is covered with the receptacle 200 at the time of fitting, it is possible to protect components and soldered portions on the base 20 of the plug 100.

  When the plug 100 is removed from the receptacle 200, the lever tip 64-1 is first pushed vertically downward with a finger to keep the gap between the lower surface of the claw 65 and the upper surface of the upper step portion 64-2 expanded. However, the plug 100 can be easily escaped by sliding the plug 100 in the plug withdrawal direction to release the engagement of the protrusion 16, the lever 64, and the claw 65.

DESCRIPTION OF SYMBOLS 100 Plug 10 Cover 11 Upper surface part 12 Side surface part 13a, 13b, 13c Rectangular recessed part 14a, 14b Rectangular convex part 15 Notch part 16 Protrusion 17 Cable accommodating part upper surface 18 Cable accommodating part side surface 19 Soldering terminal 20 Base 21 Terminal insertion hole 22 Groove 23a First terminal row 23b Second terminal row 30 Cable bundle 31 Cable tip 40 Cable bundle 41 Cable tip 50 Cable case 51 Bottom plate portion 52 Side surface portions 54a, 54b Rectangular hole 57 Cable housing portion lower surface 58 Cable housing portion side surface 200 Receptacle 60 Plug housing case 61 Upper surface portion 61-1 Guide frame 62 Guide rail 63 Positioning portion 64 Lever 64-1 Lever tip portion 64-2 Upper step portion 64-3 Lower step portion 65 Claw 66 Soldering terminal 67 Plug placement table 68 Claw 69 Inside the case Cavity 70 Body 71 First groove row 72 Second groove row 80 Contact 81 First movable terminal row 82 Second movable terminal row 83a First plug connection terminal row 83b Second plug connection terminal row

Claims (3)

A connector composed of a receptacle having a housing-shaped plug and a pair of rail-shaped side surfaces,
The plug includes a protrusion on its outer surface,
The receptacle is close to and opposed to the side surface of the receptacle, the plug connection direction end is fixed to the receptacle side, and the plug escape direction end is projected and extended from the receptacle side; and
A claw formed to cover the lever through a gap above the lever,
The lever has a lever tip formed at an end of the plug exit direction;
The upper surface of the lever tip portion side is an upper step portion, and the step formed with the upper surface of the lever on the plug connection direction end portion side as a lower step portion,
In the fitting process between the plug and the receptacle, the projection pushes down the lever tip so that the vertical width of the gap provided between the upper step portion and the lower surface of the claw is the vertical direction of the projection. Expanded to be equal to or greater than the width,
In a state where the lever is elastically restored upward, the vertical width of the gap provided between the lower surface of the claw and the lower step portion is equal to or greater than the vertical width of the protrusion. Characteristic connector. The connector according to claim 1,
Providing a groove on the outer surface of the plug;
A connector characterized in that a positioning portion for fitting with the groove portion is provided on an inner surface of the receptacle. The connector according to claim 1 or 2,
The receptacle further comprises a bowl-shaped upper surface portion formed by extending the upper surface of the plug connection direction end of the side surface of the receptacle in the receptacle inner direction,
The connector is characterized in that when the plug and the receptacle are fitted, an end portion in the plug connection direction of the plug is accommodated below the upper surface portion.

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