JPH07320809A - Double pin locking type multipolar plug - Google Patents

Abstract

PURPOSE:To facilitate checking a lock condition to improve a locking condition. CONSTITUTION:This plug is composed of the assembly of front and rear parts 66 and 42 wherein plural pins 10 are installed one by one in respective holes 46, and is constituted of an insulating pin holder 68 wherein locking protruded parts 50 for pressing the rear ends 32 of the elastic plate bodies 18 of the respective pins 10 are provided respectively in the respective holes 46 of the rear part 42, a shield metallic case surrounding the pin holder 68, and an insulating case covering them. A space for housing locking pieces 44 to be communicated with the respective holes 46 is provided on the rear part 42 of the insulating pin holder 68, and the locking pieces 44, wherein plural locking protruded parts 58 pressing the rear end 77 of one side side wall plate 20 of the respective pins 10 installed in a locking condition where all the locking pieces 44 are pushed and receding from the respective rear ends 77 of the locking pieces 44 in a lock releasing condition where part of them is protruded outside, is installed in the housing space.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multipolar plug which is suitable for use in audio-related products and which is designed to prevent the contact pin from coming off.

[0002]

2. Description of the Related Art Conventionally, a multipolar plug has been used in combination with a pair of sockets. Since this socket is embedded in the wall surface of the case of an electronic device, normally only the connection surface is exposed to the outside. If you insert an ordinary multi-pole plug into it, the plug, cord, etc. will project vertically straight from the wall of the case. Therefore, since it is difficult to insert the plug in a narrow space, an L-shaped multipolar plug has been developed and used. Usually, these multi-pole plugs consist of an insulating pin holder that installs and supports a large number of contact pins in each pin installation hole, a shield metal case that surrounds the pin holder, and an insulating case that covers them. Become.

The contact pin 10 is usually shown in FIGS.
2 is formed by punching out from a flat plate as shown in FIG. 2 and bending the necessary parts appropriately, and providing a contacting tube body 12 with a closed tip at the front end, and a center line 14 of the tube body 12 at the center. An elastic plate body (blade) 18 having a base portion at the front end with the receiving surface 16 inclined to the fulcrum and a rear end being a free end, and both side wall plates 20 (20) located on both sides of the elastic plate body 18 (20)
a, 20b) and two pieces 2 for crimping with a straight line at the rear end.
2 (22a, 22b) and both pieces 24 for crimping the covered electric wire
(24a, 24b) is used. In addition, the insulating pin holder uses an assembly that is divided into a front part and a rear part and integrally connected to each other. As shown in FIG. 13, the center of the inner upper wall near the front edge of each pin installation hole 28 of the rear part 26 is used. The locking protrusions 30 are provided respectively. Therefore, during assembly, the contact pin 10 is placed inside each pin installation hole 28 of the insulating pin holder.
When each of them is inserted from the rear, the locking protrusion 30 rides on the receiving surface 16 of the elastic plate member 18. Moreover, as the contact pin 10 is inserted, the elastic plate 18 is gradually lowered by being pushed by the locking projection 30.

Therefore, as shown in FIG. 14, the locking projection 30 rides over the rear end 32 of the elastic plate member 18, which abuts on the free end of the elastic plate member 18, and the tubular member 12 is pulled out from the pin installation hole 28 and protrudes forward to form the elastic plate member. 18 also returns to the original position according to the elastic force. Then, even if the contact pin 10 is pulled out backward from the insulating pin holder 34, the rear end 32 of the elastic plate body 18 hits the front surface of the protrusion 30 and cannot be pulled out. In addition, 36 is an oval bulge provided near the front end (near the root) of the elastic plate body 18 to increase the elastic force, and 38 is provided near the rear end 32 of the elastic plate body 18 opened in the side wall plate 20. A positioning hole for inserting the protruding portion, and 40 indicates the position of the covered electric wire connected to the contact pin 10.

[0005]

However, in such a locking method, if the insertion state of the contact pin 10 is insufficient, the elastic plate body 10 is not locked well by the protrusion 30,
The contact pin 10 may fall out of the pin installation hole 28. Even if one out of 100,000 contact pins of the multipolar plug is pulled out, the defect is large and becomes a problem.

The present invention has been made in view of the above conventional problems, and an object thereof is to provide a pin double lock type multipolar plug which can easily check the locked state and has a good locked state. To do.

[0007]

In order to achieve the above object, in the pin double lock type multipolar plug 122 according to the present invention, as the contact pin 10, a contact tube body 12 having a closed front end is provided at the front end portion. , An elastic plate 18 having a base portion at the front end with a receiving surface 16 inclined with respect to the center line 14 of the tube body 12 in the central portion as a fulcrum, and a rear end being a free end and both sides of the elastic plate body 18 A plurality of those having both side wall plates 20 located at and rear wire end caulking pieces 22 and 24 are used. Then, the contact pins 10 of them are attached to the respective pin installation holes 4
Installed one inside each of 6, 74, and a plurality of contact pins 1
A lock that consists of an assembly divided into a front part 66 and a rear part 42 for supporting 0 in a distributed manner, and holds the rear end 32 of the elastic plate body 18 of each contact pin 10 inside each pin installation hole 46 of the rear part 42. Insulating pin holders 68 provided with respective projecting portions 50, a shield metal case 82 surrounding the insulating pin holders 68, and insulating cases 114 and 116 covering them.
And constitute the multipolar plug 122.

In addition, the insulating pin holder 68 further accommodates the lock piece 44 at the rear portion 42 thereof, and the pin mounting holes 46 are provided.
A space 76 communicating with the lock piece storage space 76
The lock release state in which the rear end 32 of one side wall plate 20 of each of the plurality of contact pins 10 installed in a locked state in which all the lock pieces 44 are pushed inside is held, and a part of the lock pieces 44 protrudes to the outside. Then, the lock piece 44 provided with the plurality of locking projections 58 respectively separated from the respective rear ends 32 is installed.

At this time, the locking piece 44 is formed in a substantially U-shape as a whole, and a plurality of locking projections 58 are provided at the same position on both sides of each of the opposing leg portions 56 along the longitudinal direction of the leg portion 56. It is preferable to use the one provided at the place.

Further, the elastic plate 18 of the contact pin 10 installed inside the central portion of the connecting portion 60 connecting the two leg portions 56 even in the unlocked state in which a part of the lock piece 44 projects to the outside.
It is preferable to provide a locking projection 62 that holds the rear end 32.

[0011]

With the above construction, the locking projections 50 are provided inside the pin installation holes 46 of the rear portion 42 of the insulating pin holder 68, and the lock pieces 44 are housed in the rear portion 42 to install each pin. When the space 76 communicating with the hole 46 is provided and the lock piece 44 provided with the plurality of locking projections 58 is installed inside the lock piece storage space 76, the contact pin installed inside each pin installation hole 46 10, the former locking projections 50 press the rear end 32 of the elastic plate 18 of each contact pin 10, and the latter locking projections 58 project into the pin installation holes 46. The rear end 77 of one side wall plate 20 of the contact pin 10 can be pressed. Therefore,
Each contact pin 10 can be doubly locked against pulling out backwards. Moreover, each contact pin 10 can be doubly locked when the lock piece 44 is completely pushed into the storage space 76, and cannot be doubly locked when a part of the lock piece 44 projects to the outside. Therefore, the locked state can be checked by the presence or absence of the protrusion of the lock piece 44.

The locking piece 44 is formed in a U-shape as a whole, and a plurality of locking projections 58 are provided at the same position on both sides of each of the opposing leg portions 56 along the longitudinal direction of the leg portion 56. When the lock pieces 44 are used, the locking projections 58 are projected into the pin installation holes 46 by the operation of pushing all the locking pieces 44 into the storage space 76, and are arranged in a plurality of columns and four rows in the insulating pin holder 68. Each contact pin 10
The rear end 77 of one of the side wall plates 20 is pressed by each locking projection 58, so that each contact pin 10 can be locked all at once. It should be noted that when a part of the lock piece 44 is projected to the outside, it is in a released state, and the locking projections 5 provided on the both leg portions 56.
All 8 is retracted from the pin installation holes 46 and 74.

Further, the rear end 32 of the elastic plate body 18 of the installed contact pin 10 is pressed even in the unlocked state in which a part of the lock piece 44 is projected to the outside inside the center of the connecting portion 60 connecting the both leg portions 56. If the locking projection 62 is provided, the inside of the pin installation hole 46 where the locking projection 50 is not provided near the outer side of one of the 3rd and 4th rows of the pin installation holes 46 arranged in a plurality of columns and 4 rows. Even in the unlocked state in which a part of the lock piece 44 is projected to the outside with respect to the contact pin 10 installed at, the rear end 32 of the elastic plate body 18 of the contact pin 10 can be pressed and locked. Therefore, all the lock pieces 44 are stored in the storage space 7.
When it is pushed into the inside of 6, the locking projection 62 further projects into the inside of the pin installation hole 46, and the locked state is further improved.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a partial sectional view of an insulating pin holder showing a state in which one contact pin of a pin double lock type round multipole L-shaped plug of a variable code direction type to which the present invention is applied is installed. FIG. FIG. 3 is a rear view showing an unlocked state in which a part of the stored lock piece in the rear part projects, and FIG. 3 is a front view of the lock piece. In the figure, 42 is a rear part of an insulating pin holder consisting of a front part and a rear part, and 44 is a lock piece housed in a space provided in the forefront central part of the rear part 42. The rear portion 42 is a symmetrical disk body having a lock piece storage space made of plastic, and 13 square pin installation holes 46 (46a, 46a, 46 m) are provided in a distributed manner, and the positioning protrusions 48 are provided on the four sides of the peripheral surface, that is, on the left and right on the upper surface side and on the left and right on the lower surface side.
(48a, ... 46d) are provided so as to project obliquely upward and downward.
And among these pin installation holes 46, 12 pieces are arranged in three rows,
They are evenly arranged in four rows, and one is provided near the upper side between the third and fourth rows. Further, each pin arrangement hole 46 arranged in a matrix is provided with a rectangular locking protrusion 50 (50a, ... 50l) at the center of the inner upper wall near the front edge thereof. or,
A groove 52 (5) for inserting both arms for connection provided in the front part of the insulating pin holder at the center of the left and right surfaces along the axis along the peripheral surface.
2a, 52b), and a groove 54 for operating a hook piece (described later) is provided at the center of the lower surface. Since the upper wall of the pin installation hole 46m located at the center of the upper side is thin or absent, the locking projection cannot be provided inside.

Further, the locking piece 44 is formed in a U shape as a whole, and locking projections 58 {58a (58) are provided at the same positions on the left and right sides of the leg portions 56 (56a, 56b) facing each other.
a1 ... 58a6), 58b (58b1, ... 58b6)
)} Are provided at equal intervals along the longitudinal direction of the leg portion 56.
At that time, a part of the rear side of each of the locking protrusions 58 is projected downward as shown in FIG. 4 to form a hook shape. However, each leg 5
Locking projections 58a1, a2, b1, b at the base of 6
2 has a hook-like shape in which only the rear portion is projected downward, but the other locking protrusions 58a3, ... A6, b3
, ... b6 are all hook-shaped projections.

Further, the rear end 32 of the elastic plate body 18 of the installed contact pin 10 is pressed even in the unlocked state in which a part of the lock piece 44 projects to the outside inside the center of the connecting portion 60 connecting the both leg portions 56. A rectangular locking protrusion 62 is provided. Moreover, the locking projection 62 is formed in each pin installation hole 46.
The same shape and size as the locking projection 50 provided inside. In addition, each leg portion 56 also has its tip end portion protruded to the left and right, and then the protrusions 64 (64
a, 64b) respectively.

FIG. 5 is a rear view showing a locked state in which all the stored lock pieces at the rear of the insulating pin holder are pushed in. The unlocked state as shown in FIG. 2, that is, the lock piece 44
Is housed in the main body of the rear portion 42 and a part of the rear portion is projected outward by a certain width.
None of the locking projections 58 provided on the above-mentioned projections project into the respective pin placement holes 46 arranged in a matrix of 3 columns and 4 rows, and only the locking projections 62 provided on the connecting portion 60 are on the upper side. It projects inside the pin installation hole 46m provided at the center. At that time, the locking projections 50, 62 for the respective pin installation holes 46
The projecting states of are equal. The lock piece storage space communicates with each pin installation hole 46. In the locked state as shown in FIG. 5, that is, when the lock pieces 44 are all pushed into the main body of the rear portion 42, the locking projections 58 provided on both leg portions 56 of the lock pieces 44 are provided with corresponding pins. The locking projection 62 provided on the connecting portion 60 projects inside the hole 46, and projects further inside the pin installation hole 46m. The lock piece 4
4 of the leg portions 56 of the No. 4 are 1, 2 between the pin installation holes 46 and 3, 4
Place between each line.

FIG. 6 is a perspective view seen from the rear side showing a lock release state in which a part of the lock piece housed in the insulating pin holder projects to the outside. The insulating pin holder 68 is completed by integrally joining the front portion 66 to the rear portion 42 in the unlocked state shown in FIG. The front portion 66 is also a left-right symmetric disk body having the same diameter as the plastic rear portion 42,
Similar to the rear part 42, 13 rectangular pin installation holes penetrating in the front and rear are distributedly provided in the central part thereof, and four positioning protrusions 70 and hook piece operation grooves are provided on the peripheral surface. However, a groove is not provided at the center of the left and right surfaces, and an arm 72 (72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72b, 72c, 72c, 72c, 72c, 72c, 72c, 72d, 72c, 72c, 72d, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72a, 72c, 42d, 42c, 42d, 42c, 42d, 42c, 42d, 42d, 42d, 42d, 42d, 42d, 42d, 42d, 42d, 42d, 42d, 42d, 42d, 42d, 42d, 42d, 42d, 42d, 42d, 42d, 42d, 42d, 42d.
72b) is provided.

Such an insulating pin holder 68 is shown in FIG.
As shown in, each pin installation hole 74 of the front portion 66 and each pin installation hole 46 of the rear portion 42 communicate with each other in a linearly corresponding hole,
The lock piece storage space 76 intersects and communicates with the central portion. The locking projection 50 exists near the lock piece storage space 76 inside the communicating pin installation holes 46 and 74. However, the locking projection 62 of the locking piece 44 occupies that position in the pin installation holes 46 and 74 at the upper center. In addition,
The pin installation hole 74 of the front portion 66 prevents the contact pin 10 inserted from the rear from coming out forward, so that the upper wall portion 78 near the front edge is slightly projected into the pin installation hole 74.

At the time of assembling the pin double lock type multipolar L-shaped plug, a part of the lock piece 44 is projected to the outside so as to be in an unlocked state, and each pin installation hole 4 of the insulating pin holder 68
The contact pins 10 are inserted from the rear into the insides of 6 and 74, respectively, and installed. Then, as in the conventional case, each locking projection 50
(62) rides over the free end of the elastic plate 18 and
Protrudes forward from the pin installation holes 46 and 74, and the elastic plate body 18 also returns to the original position according to the elastic force. Therefore, the rear end 3 of the elastic plate body 18 is locked by the locking projection 50 (62).
2 can be pressed and locked to prevent backward slipping. It should be noted that when a part of the lock piece 44 is projected to the outside, the lock is released, and the locking projections 58 provided on the both leg portions 56 are provided.
All retract from the pin installation hole 46.

Then, the lock pieces 44 are all pushed into the storage space 76. Then, as shown in FIG. 1, the locking projections 58 provided on the leg portions 56 of the lock piece 44 simultaneously project into the pin installation holes 46, and the contact pins arranged in three rows and four rows. The rear end 77 of one of the side wall plates 20
Contact each. Therefore, the rear end 77 of the side wall plate 20 can be further pressed and locked by the locking projection 58, and the rearward removal can be prevented. The locking projection 62 provided on the connecting portion 60 of the lock piece 44 further protrudes into the pin installation hole 46m when the lock piece 44 is fully pushed, so that the locked state is further improved. In this manner, the 13 contact pins 10 are connected to the pin mounting holes 46 of the insulating pin holder 68.
Each of the 12 contact pins 10 arranged in a matrix is doubly locked by the locking projections 50 and 58 against the backward pull-out when installed one by one inside the Yes, one contact pin 10 in the upper center
Can be strengthened by the locking projection 62. Moreover, each contact pin 10 can be checked for the locked state by the pushing state of the lock piece 44, that is, the presence or absence of the protrusion of the lock piece 44.

FIG. 8 is a perspective view showing the connection state of the cord to the insulating pin holder and the shield metal case accommodating the insulating pin holder. In the figure, 80 is a cord and 82 is a shield metal case. The cord 80 has a shield metal net and contains 13 covered electric wires 40 inside, and each covered electric wire 40 is connected to the contact pin 10.
The connection between each covered electric wire 40 and each contact pin 10 is performed before each contact pin 10 is inserted into the insulating pin holder 68. The 13 covered electric wires 40 are bundled with an insulating tape 83.

The shield metal case 82 is formed by punching and bending a single flat plate, and has a main body cylinder 84 that covers and surrounds the peripheral surface of the insulating pin holder 68 and an E-shaped lock protruding rearward from a part of its rear end. And a part 86. And
The body cylinder 84 is provided with four rectangular holes 88 at its rear portion, into which the positioning protrusions 48 and 70 of the insulating pin holder 68 are respectively fitted. Also, the lock parts 86 are adjacent to each other.
It is located between the positioning projection fitting holes 88 at some locations and projects rearward along the axis. The lock portion 86 includes a base portion 90 and three legs 92 protruding forward from both ends and the center thereof.
The legs 92 on both sides are connected to the main body cylinder 84, and the inner legs 92 are hook pieces having hooks for connecting to the socket side at the tips, and are protruded up to near the front end of the main body cylinder 84. Further, the terminal piece 94 is provided on the side opposite to the middle leg 92 of the base 90.
And a tip of a shield metal net 96 arranged linearly is connected thereto. When the insulating pin holder 68 is housed in a predetermined position of the main body cylinder 84 of the shield metal case 82 as shown in FIG. 8, the lock piece 44 is pressed by the inner wall of the cylinder 84 from the outside. Therefore, a part of the lock piece 44 does not project to the outside, and the locked state is maintained well.

Next, a shield metal cap 98 is attached to the insulating pin holder 68, the shield metal case 82 and the like assembled as shown in FIG. This shield metal cap 98 is also formed by punching and bending from a single flat plate, has a cylindrical body 100 at the front end, and has two cord crimping pieces 102 with a short projecting length from the center to the rear end. The portion is also provided with two cord crimping pieces 104 having a long protruding length. Moreover, in the cylindrical body 100, four holes are provided in the front portion except the rear end portion, and the holes 1 for installing the hook pieces of the lock portion 86 are provided.
06 are arranged at equal intervals along a circle centered on the axis line by 90 degrees apart from each other. In addition, the cylindrical body 100
Holes 108 into which the positioning protrusions 48 and 70 of the insulating pin holder 68 are fitted are provided at the front end portions between the hook piece installation holes 106. Further, the rear portion 112 connected to the circular lid portion 110 that closes the rear end of the cylindrical body 100 has a cord caulking piece 10.
2, 104, and project in the direction perpendicular to the axis. In addition,
When the placement of the shield metal cap 98 with respect to the rear portion of the shield metal case 82 is changed by appropriately rotating it by 90 degrees at the time of mounting, each positioning protrusion 4 of the insulating pin holder 68 is changed.
The hole 108 into which the holes 8 and 70 are fitted, the hole 106 into which the hook piece of the lock portion 86 is installed, and the like can be selected. Therefore, the protruding direction of the cord 80 can be appropriately selected while keeping the rear portion 112 of the shield metal cap 98 in the direction perpendicular to the axis of the shield metal case 82.

Next, as shown in FIG. 10, the insulating case main body 114 and the insulating case lid 116 for closing the rear surface opening are attached to these assembled parts. The insulating case body 114 has a central storage chamber opened before and after storing the insulating pin holder 68, the rear portion of the shield metal case 82, the cylindrical body 100 of the shield metal cap 98, the end portion of the cord 80, and the shield metal cap. There is provided a cord storage chamber for storing the rear portion 112 of 98 and the like. Then, a step is formed on the inner diameter of the central storage chamber, the front side thereof is matched with the outer shape of the shield metal case 82, and the rear side thereof is matched with the outer diameter of the cylindrical body 100 of the shield metal cap 98. The cord storage chamber is provided below the rear end of the central storage chamber so as to communicate with the central storage chamber, and the rear surface and the bottom surface are opened. or,
Holes 118 for hooking the hook pieces of the insulating case lid 110 are provided at symmetrical positions of the center of the rear portion of the top wall of the central storage chamber, the left and right side walls of the cord storage chamber, and the front and rear end portions of the corners of the front wall. Further, rectangular hook operation pieces 120 for operating the hook pieces of the lock portion 86 are provided at the central portions of the left and right side walls of the central storage chamber. In addition, each hook operation piece 120
Make a U-shaped hole around the three sides.

In this manner, the positioning protrusions 48 and 70 of the insulating pin holder 68 are inserted, and the rear portion of the shielded metal case 82 and the cylindrical body 100 of the shielded metal cap 98, etc., are inserted into the insulating cases 114 and 116. When held from the outside, not only will the connections between the parts become stronger, but the contact condition of the overlapping parts will also be better, and the code 80 with the variable code direction pin double lock type round multi-pole L type The plug 122 is completed. In the figure, 124 is a hook piece that hits the middle leg of the lock portion 86, 126 is an inwardly projecting positioning projection used for connection with the socket side, and 128 (128a, 128b) is the tip of each hook piece provided on the right side. The hook 130 provided on the part is also the finger hanging concave and convex portion on the right side. Regarding this type of variable cord direction round multi-pole L-type plug, the present applicant has previously filed Japanese Patent Application No. 5-55005.

[0027]

According to the present invention described above, claim 1
Then, hold the rear end of the elastic plate of the contact pin with the lock projections provided in the pin installation holes at the rear of the insulating pin holder, and then further lock the lock projections of the lock pieces stored in the lock piece storage space at the rear. Since the rear end of the side wall plate of one of the contact pins is pressed by the portion, each contact pin can be doubly locked against the backward slip. Moreover, when the lock piece is fully pushed into the storage space, each contact pin can be locked, and when part of the lock piece is projected to the outside, the lock is in the unlocked state. Easy to check.

According to the present invention, since the whole is formed in a U shape, and the locking projections are provided at the same position on both sides of the opposing leg portions, respectively, at a plurality of positions along the longitudinal direction of the leg portion. By simply pushing all the lock pieces into the storage space, it is possible to lock all the contact pins arranged in a plurality of columns and four rows in the insulating pin holder at once. Therefore, the assembly efficiency of the pin double lock type multipolar plug is improved.

According to a third aspect of the present invention, the rear end of the elastic plate body of the installed contact pin is held inside the center of the connecting portion connecting both legs of the lock piece even in the unlocked state in which a part of the lock piece projects to the outside. Installed in the pin installation hole where the locking projection is not provided near the outside of one of the 3rd and 4th rows of the pin installation holes arranged in multiple columns and 4 rows of the insulating pin holder to provide the locking projections. The contact pin can be locked by pressing the rear end of the elastic plate of the contact pin even in the released state where a part of the lock piece protrudes to the outside. Can be good.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing an installed state of one contact pin of an insulating pin holder of a pin double lock type round multipole L-shaped plug of a variable code direction type to which the present invention is applied.

FIG. 2 is a rear view showing an unlocked state in which a part of a lock piece housed in a rear portion of the insulating pin holder projects to the outside.

FIG. 3 is a front view of the lock piece.

FIG. 4 is a partial right side view of the lock piece.

FIG. 5 is a rear view showing a locked state in which all of the stored lock pieces at the rear of the insulating pin holder are pushed in.

FIG. 6 is a perspective view seen from the back side showing a lock released state in which a part of the lock piece housed in the insulating pin holder projects to the outside.

FIG. 7 is a partial cross-sectional view of an insulating pin holder showing a 1-pin installation hole with the lock piece removed.

FIG. 8 is a perspective view showing an assembly of the insulating pin holder and a shield metal case or the like.

FIG. 9 is a perspective view showing how the shield metal cap is attached to the assembly.

FIG. 10 is a right side view showing a completed state of the pin double lock type round multipolar L-shaped plug of the same code direction variable type.

FIG. 11 is a right side view of the contact pin.

FIG. 12 is a plan view of the contact pin.

FIG. 13 is a rear view of a rear portion of an insulating pin holder of a conventional cord direction variable type round multipole L-shaped plug.

FIG. 14 is a partial cross-sectional view showing an installed state of one contact pin of the insulating pin holder.

[Explanation of symbols]

10 ... Contact pin 12 ... Contact tube 14 ... Center line 1
6 ... Receiving surface 18 ... Elastic plate body 20 ... Side wall plate 22, 2
4 ... Wire crimping piece 32, 77 ... Rear end 40 ... Coated electric wire
42 ... Rear part 44 ... Lock piece 46, 74 ... Pin installation hole 48, 70 ... Positioning projection 50, 58, 62 ... Lock projection 52 ... Arm installation groove 54 ... Lock part installation groove 56 ... Leg 60 ... Connection part 64 … Prevention protrusion 66
Front part 68 Insulation pin holder 72 Arm 76 Lock piece storage space 80 Cord 82 Shield metal case 84 Main body cylinder 86 Lock part 94 Terminal piece 9
6 ... Shield metal net 98 ... Shield metal cap 1
00 ... Cylindrical body 102, 104 ... Cord caulking piece 106 ... Hook piece installation hole 110 ... Circular lid 114, 116 ... Insulating case 120 ... Hook operation piece
122 ... Pin double lock type round multi-pole L-shaped plug 124
… Hook piece

Claims (3)

[Claims] 1. A contact tube having a closed tip is provided at a front end, and a root portion at a front end having a receiving surface inclined with respect to a center line of the tube is provided as a fulcrum at a central portion, and a rear end is provided at the rear end. An elastic plate body which is a free end and both side wall plates located on both sides of the elastic plate body are provided, and one contact pin having a wire crimping piece at the rear end is installed in each pin installation hole. It consists of an assembly that is divided into a front part and a rear part that disperse and support the contact pins of each, and a locking projection that holds the rear end of the elastic plate of each contact pin is provided in each pin installation hole at the rear part. In a multi-pole plug including an insulating pin holder, a shield metal case surrounding the insulating pin holder, and an insulating case covering the insulating pin holder, a lock piece is housed in the rear part of the insulating pin holder and is continuously connected to each pin installation hole. The space for the lock is provided in the lock piece storage space. Push in all the lock pieces Press the rear end of one side wall plate of each contact pin installed in the locked state, and in the unlocked state where a part of the lock piece projects to the outside, from the respective rear ends A pin double lock multipolar plug characterized by installing a lock piece provided with a plurality of locking projections that are separated from each other. 2. A lock piece having a U-shape as a whole and provided with a plurality of locking protrusions at the same position on opposite sides of each of the opposing leg portions along the longitudinal direction of the leg portion. The double pin lock type multipolar plug according to claim 1. 3. A locking projection for pressing the rear end of the elastic plate of the installed contact pin is provided inside the center of the connecting portion connecting both legs, even in the unlocked state in which a part of the lock piece projects to the outside. The pin double lock type multipolar plug according to claim 2, wherein