JP2002042973A - Mark key structure of connector, connector having the key structure, mark key formation element used in the key structure, and mark key formation member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mark key structure of a connector capable of easily cope with diversity of mark keys for preventing erroneous fitting. SOLUTION: This mark key structure of the connector in which a first mark key 20 and a second mark key 40 are fitted mutually when a first connector 10 having the first mark key 20 and a second connector 30 having the second mark key 40 are mutually fitted is constituted such that at least one key groove 41 extending in the direction of fitting of both connectors 10, 30 is arranged in parallel on at least one sidewall face of a housing 34 in the second connector 30 and the second mark key 40 forms a mutually compensating shape of the first mark key 20 by inserting and fixing a mark key formation element 60 in the specific key groove 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a code key structure of a connector used in various electronic devices such as communication devices such as electronic exchanges and electronic transmission devices and computer devices. Here, the code key is used to prevent erroneous fitting between connectors having similar shapes, and includes a first code key having a specific shape and the first code key.
It has a pair structure including a second code key selectively fitted to the code key. The present invention particularly provides a second connector which is fitted only to a first code key provided on a board side male connector.
The present invention relates to a cable-side female connector having a code key.

[0002]

2. Description of the Related Art For example, in an electronic exchange, many connector pairs are used. These connector pairs are composed of a board side male connector and a cable side female connector that are very similar in shape. Therefore, when connecting the connector pair, the operator may connect the cable side female connector to the board side male connector which should not be connected. In order to prevent erroneous connection between connectors, a code key pair having a specific concavo-convex pattern different for each connector pair, that is, a first code key and a second code key are provided in each connector.

[0003] Each code key is provided to a connector as follows, for example.

[0004] The first configuration (for example, Japanese Patent Laid-Open No. 3-1141)
No. 55 and IEC standard 176/99), as shown in FIG. 1, is a type in which housings 112 and 132 of connectors 110 and 130 are molded and then code keys 116 and 134 separately prepared are attached. . That is, the housing 112 of the male connector 110 is
4, while molding a housing 132 of the female connector 130 having a terminal hole 134 for receiving the terminal hole pin 114. Then, as shown in FIG. 1, the separately prepared first code key 116 is attached to the inner surface of the housing 112 of the male connector 110, and the separately prepared second code key 134 is attached to the outside of the housing 132 of the female connector 130. It is attached to the wall.

The second configuration is of a type in which a code key is integrally formed when molding the housing of each connector (not shown). That is, the first code key and the second code key are integrally formed on the male connector housing and the female connector housing, respectively.

However, the first configuration has a problem that it is difficult to diversify the code key pairs. That is, in order to increase the variation of the code key pair, it is necessary to have various types of code key pairs. This can be costly due to the need to manufacture various types of code key pairs, difficult to manage because the code key shapes are very similar, In such a case, there is a problem that an unnecessary code key pair must always be prepared so that the work is not interrupted due to lack of the key. In the second configuration, as in the case of the above-described first configuration, various types of connectors must be separately provided, which further increases the manufacturing cost of the connectors, is difficult to manage, and is inherently unnecessary. There are problems such as the necessity of preparing even the most important items.

[0007]

SUMMARY OF THE INVENTION Accordingly, the technical problem to be solved by the present invention is to provide a code key structure for a connector which can easily cope with diversification of code keys for preventing erroneous fitting. An object of the present invention is to provide a connector having the key structure, a code key forming element used for the key structure, and a code key forming member.

[0008]

In order to solve the above technical problems, a code key structure according to the present invention comprises:
When the first connector having the first code key and the second connector having the second code key are fitted, the code key structure of the connector in which the first code key and the second code key are fitted, In the two-connector, at least one key groove extending in a fitting direction of the two connectors is arranged in parallel on at least one side wall surface of the housing, and a code key forming element is inserted into a specific key groove. Thus, the second code key has a complementary shape to the first code key.

According to the above configuration, a specific key groove in each key groove row provided on at least one side wall surface of the housing of the second connector is matched with the first sign key of the first connector. The code key forming element is inserted by various known methods such as press-fitting, fitting or bonding. As a result, a second code key having a shape complementary to the first code key is formed on the side wall surface of the second connector housing. When connecting various mating connectors on site, the operator prepares the minimum necessary second connectors and code key forming elements without preparing many unnecessary second connectors and second code keys. Then, a second code key having a shape corresponding to the first code key is created at the connection site using a code key forming element prepared in advance. That is, the operator can flexibly create the second code key at the connection site according to the various first code keys. Therefore, according to the code key structure of the connector according to the present invention, various second
It is not necessary to manufacture, always hold, or prepare the code key and the second connector. The keyway is usually provided on one side wall surface of the housing of the second connector, but by providing it on each of the other side wall surfaces, the connector key structure can be further diversified.

Preferably, the key groove of the second connector comprises a locking groove having a dovetail shape and an insertion groove having a rectangular cross section smaller in size than the locking groove. It comprises a distal insertion portion having a complementary shape to the groove, and a proximal insertion portion connected to the distal insertion portion in a direction opposite to the insertion direction and complementary to the locking groove.

According to the above configuration, in the key groove, the locking groove has a "dovetail" shape, that is, a trapezoidal shape in which the cross section is widened on the bottom side.
It has a proximal insert that is complementary to the "dovetail" shape. Therefore, due to the engagement of the two dovetails,
Dropping in a direction orthogonal to the connector fitting direction is prevented. Since the cross section of the insertion groove is a rectangular shape smaller than the dovetail-shaped locking groove, a step as a stopper surface is formed at the boundary between the insertion groove and the locking groove. Similarly,
In the code key forming element, a step as a stopper is formed at a boundary between the distal end insertion portion and the base end insertion portion. Therefore, when the code key forming element is inserted into the key groove of the second connector, the step of the code key forming element contacts the step of the key groove, and the code key forming element is positioned in the key groove. You.

Preferably, the base end insertion portion has a through hole extending in the insertion direction of the code key forming element at a central portion thereof, and the locking portion projects outward and engages with the side surface of the locking groove. Is provided on at least one side surface, and when the code key forming element is inserted into the key groove, the locking portion of the code key forming element elastically contacts the side surface of the locking groove.

The locking portion of the proximal insertion portion is provided on a side surface of the proximal insertion portion and provides an elastic force to the side surface of the locking groove. As the locking portion, for example, a configuration in which a rib is provided on the outer surface of a flat plate side wall formed by providing a through hole extending in the insertion direction at the center portion of the base insertion portion, the center of the base insertion portion, In which a side wall formed by providing a through hole extending in the insertion direction in the portion is curved outward, or a rigid body without a through hole extending in the insertion direction at the center of the base end insertion portion A type is used.

By providing a through hole extending in the insertion direction at the center of the code key forming element, the side wall of the code key forming element becomes a plate-like spring body. Then, the width of the through hole becomes the deformable amount of the side wall as the plate-shaped spring body. When the code key forming element is inserted into the key groove, the locking portion displaced in the center direction because the locking portion protruding outward receives a force deforming in the center direction from the side wall surface of the key groove. The reaction force acts on the side wall surface of the keyway. By such elastic contact between the side wall surface of the key groove and the locking portion of the code key forming element,
Since the two are frictionally engaged, the code key forming element is prevented from dropping from the keyway in the direction opposite to the insertion direction. In addition, even if the code key forming element has a dimensional tolerance, the plate key spring structure can absorb the dimensional tolerance, so that the code key forming element can be easily manufactured.

The rib is preferably provided on the outer surface of the flat side wall of the code key forming element. However, the rib may be provided on the side wall surface of the key groove of the second connector or on both the code key forming element and the key groove. It is. Further, since the key groove of the second connector has a dovetail shape, the code key forming element fitted in the key groove is prevented from falling off in a direction orthogonal to the insertion direction of the code key forming element.

The above-mentioned key structure is applicable to the male connector on the board side and the female connector on the cable side. In the case of the male connector on the board side, the first code key is usually provided in advance, so the second code is used. Apply the key to the female connector on the cable side.

The code key forming element is provided on the second connector so that the second code key provided on the second connector is complementarily fitted to the first code key provided on the first connector. It is inserted into a dovetail-shaped keyway. That is, the code key forming element has a base end insertion portion having a shape complementary to the key groove, the base end insertion portion has a fitting convex portion thereon, and a central portion thereof extends in the insertion direction. And at least one side surface has a locking portion that protrudes outward and engages the side surface of the key groove. When the base end insertion portion is inserted along the key groove, the first A second code key is formed which is complementary to the code key.

The code key forming element configured as described above has
While it can be easily inserted into the keyway, it is extremely difficult to come off the keyway. Therefore, the second code key having the above-described structure has the same fitting property as that of the second code key member or the housing-integrated molded product described in the related art.

The code key forming member includes a code key forming element and a grip portion connected to the code key forming element, and has a break at a boundary between the code key forming element and the grip portion.

That is, according to such a configuration, the operator inserts and inserts the code key forming element at a predetermined position in the key groove of the second connector while holding the grip portion of the code key forming member. Then, by bending or rotating the grip, the code key forming element is cut off from the grip at the break. Although the code key forming member is a small chip-shaped member, it is difficult to handle it manually, but the above configuration improves the handleability.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cable-side female connector 30, a code key forming element 60 inserted into the cable-side female connector 30, and a code key including the code key forming element 60 according to an embodiment of the present invention will be described below. The forming member 50 will be described in detail with reference to FIGS.

FIG. 2 is a perspective view of the board-side male connector 10 as the first connector and the cable-side female connector 30 as the second connector.

The board side male connector 10 has conductive pins 16 fixedly arranged at a predetermined pitch with respect to the insulating board 12,
And a housing 14 fixed to the substrate 12 so as to surround the conductive pins 16. The housing 14
It has a substantially rectangular parallelepiped frame shape and is formed by molding an insulating resin material (for example, a general-purpose engineering resin such as PBT, PCT, or nylon).

In FIG. 2, the first code key 20 is formed integrally with the inner surface of the upper wall of the housing 14 when the housing 14 is formed. The first code key 20 has a so-called key shape, and complementarily fits with the second code key 40 of the connector to be fitted, that is, the female connector 30 on the cable side, to form a code key pair. In the first sign key 20 shown in FIG. 2, the first key flat portion 22, the first key groove portion 24, the first key flat portion 22, and the first key protrusion portion 2 are arranged in order from the left.
6, the first key flat portion 22, the first key protrusion portion 26, the first key flat portion 22, the first key protrusion portion 26, and the first
This is a code key pattern in which the key flat portions 22 are arranged. The first key groove 24 and the first key protrusion 26
Are concave and convex portions each having a substantially rectangular parallelepiped shape extending in the connector fitting direction.

The cable-side female connector 30 includes a housing 34 and a socket terminal (not shown). The housing 34 has a substantially rectangular parallelepiped shape, and is dimensioned so as to fit with the housing 34 of the male connector 10 on the board side. A plurality of terminal holes 36 are provided in the housing 34 at positions corresponding to the conductive pins 16, and socket terminals are arranged in the terminal holes 36.

Since the housing 34 requires high mechanical strength for fitting with the housing 14 and press-fitting and insertion of the code key forming element 60, glass fiber is used for general-purpose engineering resin such as PBT, LCP, and nylon. Those added are preferred. Specifically, for each engineering resin of PBT, LCP, nylon,
Add 10-40% glass fiber. In this case, one having an elastic modulus of 5,000 to 10,000 MPa is obtained.

In FIG. 2, four second keyways 41 for the second code key 40 are integrally formed on the outer surface of the upper wall of the housing 34 when the housing 34 is formed. Each of the second key grooves 41 includes an insertion groove 42 and a locking groove 44 extending in the connector fitting direction. For example,
In a 5 × 6 metric connector, a second sign key 40 is provided on at least one side wall surface. The second
The code key 40 has 1 to 5 second key grooves 41 arranged in parallel.

The locking groove 44 has a dovetail shape, that is, a trapezoidal shape having a cross section that expands at the bottom. The insertion groove 42 has a rectangular shape whose cross section has a smaller area than the locking groove. Therefore, a stopper surface 46 is formed at the boundary between the insertion groove 42 and the locking groove 44.

The insertion groove 42 usually has a length (l ₃ ) of 0.5.
-10mm, width 1-10mm, depth 0.5-3mm
It is. Preferably, the length is 3.5 mm and the width is 1.0 m
m, depth is 0.9 mm. Normally, the locking groove 44 has a length (l ₄ ) of 1 to 10 mm, an upper width of 1 to 10 mm, a depth of 0.5 to 3 mm, and an angle (θ) between the vertical surface of the upper side and the oblique side of 5 mm. ~ 45 degrees. Preferably, the length is 6 m
m, the upper width is 1.5 mm, the depth is 0.9 mm, and the angle (θ) is 15 degrees. Note that the above angle range is preferable because when the angle (θ) between the vertical surface of the upper side and the oblique side is less than 5 degrees, the angle tends to deviate, and when the angle (θ) is more than 45 degrees, the moldability of the resin deteriorates. It is.

FIG. 3 shows a code key forming member 5 according to the present invention.
0 is a perspective view of the code key forming element 60 viewed from the bottom side, and thus the code key forming element 60 is illustrated in a so-called inverted trapezoidal shape.

The code key forming member 50 has a so-called key shape, and is composed of a code key forming element 60 and a grip portion 54 extending in the insertion direction as a whole.

The grip portion 54 is a substantially square flat plate, and has a substantially rectangular parallelepiped support portion extending from the substantially square flat plate in the insertion direction. At a boundary between the code key forming element 60 and the support portion, a notch (break portion) 58 for breaking the code key forming element 60 from the grip portion 54 is formed.
The notch 58 does not break when press-fitted and inserted into the key groove 41, but has a mechanical strength such that the notch 58 can be broken when it is cut off from the grip portion 54.

FIG. 5 is a bottom view of the code key forming element 60. The code key forming element 60 extends in the connector fitting direction as a whole, and includes a proximal insertion portion 62 and a proximal insertion portion 6.
The insertion base portion 74 includes a tip insertion portion 64 extending from the insertion base portion 2, and a fitting convex portion 72 formed on the insertion base portion 74. The distal end insertion portion 64 has a substantially rectangular shape when viewed from the bottom. The base end insertion portion 62 has a substantially rectangular shape in bottom view that is slightly larger than the front end insertion portion 64. Therefore, the boundary between the distal end insertion portion 64 and the proximal end insertion portion 62 becomes a step,
This is the stopper 65.

The code key forming element 60 includes the second keyway 41
That mechanical strength is required for press-fitting and insertion into a small chip-shaped member,
It is made of a general-purpose engineering resin such as PBT, nylon, PC, ABS, etc. for reasons such as being used in various environments (for example, high temperatures). Although it is possible to use a general-purpose engineering resin without adding glass fiber, it is preferable to add glass fiber. The amount of glass fiber to be added is appropriately selected according to the material and size of the second key groove 41 to be inserted, but 0 to 30% of glass fiber is added to the general-purpose engineering resin. With the addition of glass fibers, both stress relaxation resistance (set resistance) and mechanical strength can be obtained.

The tip insertion portion 64 usually has a length (l ₁ ) of 0.5 to 10 mm and a width of 1 to 10 mm. Preferably, the length (l ₁ ) is 4 mm and the width is 1.0 mm. The proximal insertion portion 62 usually has a length (l ₂ ) of 1 to 10 mm and an upper width of 1 to 6 mm. Preferably, the length (l ₂ ) is 5.
6 mm, top width is 1.9 mm. The distal end portion 70 of the distal end insertion portion 64 is tapered to facilitate insertion.

A through hole 66 extending in the connector insertion direction is formed at the center of the base insertion portion 62. The through hole 66 has a length covering the above-mentioned two ribs 68, and usually has a length of 0.5 to 9.5 mm and a width of 0.3 to 5 mm. Preferably, the length is 3 mm and the width is 0.4 mm. Therefore, on both sides of the through hole 66, a flat side wall 63 that is elastically deformed in a direction perpendicular to the connector insertion direction is formed.

On the outer surfaces of both side walls 63 of the base insertion portion 62,
Two ribs 68 projecting in a direction perpendicular to the insertion direction are arranged in parallel along the insertion direction. Two or more ribs 68 can be provided, and the ribs 68 on both side walls 63 can be symmetrically or staggered. The rib 68 usually has a protruding height of 0.05 to 1 mm, preferably,
0.1 mm.

The locking portion comprises a flat side wall 63 and a rib 68. The rib 68 on the flat side wall 63 is
4 is elastically engaged with the side wall surface.

Further, as shown in FIG. 7, the code key forming element 60 has a two-stage configuration in which a fitting projection 72 having a rectangular shape in a side view is formed on an insertion base 74. The trapezoidal portion of the insertion base 74 has a shape complementary to the locking groove 44, and usually has an upper side of 1 to 6 mm, a height of 0.5 to 3 mm, and an angle between a vertical surface of the upper side and the oblique side. (Θ) is 5 to 45 degrees. Preferably, the upper side is 1.9
mm, the height is 0.9 mm, and the angle (θ) is 15 degrees.
The rectangular portion of the insertion base 74 has a shape complementary to the insertion groove 42, and usually has a width of 1 to 10 mm and a height of 0.5 to 3 mm. Preferably, the width is 1.5 m
m, height is 0.9 mm.

The square fitting projection 72 has a shape complementary to the first keyway portion 24 of the first sign key 20, and usually has a width of 1 to 6 mm and a height of 0.1 mm. 5 to 2 mm
It is. Preferably, the width is 1.9 mm and the height is 1.0 mm
It is.

Next, a method of forming the second code key 40 by press-fitting and inserting the code key forming element 60 into the second key groove 41 will be described with reference to FIGS.

FIG. 4 shows the code key forming member 5 shown in FIG.
It is explanatory drawing which shows a mode that the code key forming element 60 is inserted in the 2nd keyway 41 of the cable side female connector 30 using 0. FIG. 6 is a partial cross-sectional view showing a state where the code key forming element 60 is inserted into the second key groove 41.

The operator inserts the code key forming element 60 along the second key groove 41 of the cable-side female connector 30 while holding the grip portion 54 of the code key forming member 50 provided with the code key forming element 60. The base part 74 is press-fitted and inserted.
Since the stopper 65 of the inserted code key forming member 50 abuts against the stopper surface 46, the code key forming member 5
0 is further restricted from being inserted, and the code key forming member 50 is positioned with respect to the second key groove 41.

After the code key forming element 60 is inserted into the second key groove 41, the code key forming element 60 is provided at the tip of the support of the grip section 54 by rotating or bending the grip section 54. It is cut and separated from the notch 58. Usually, the code key forming member 50 has a small chip shape and is difficult to handle by hand. However, according to the above configuration, the code key forming member 50 is easy to handle.

When the code key forming element 60 is inserted into the second key groove 41, both side walls 63 having outwardly projecting ribs 68 apply a force for deforming in the center direction to the side of the second key groove 41. Received from the wall. At this time, the through holes 66 reduce the through space, so that the side walls 63 having the ribs 68 are displaced toward the center. That is, the rib 68
The side walls 63 having the function as a plate-shaped spring body. The both side wall surfaces of the second key groove 41 and the ribs 68 of the code key forming element 60 are elastically contacted with each other and frictionally engaged with each other.
Is prevented from falling off in the direction opposite to the insertion direction. Further, even if the code key forming element 60 has a dimensional tolerance,
Since the dimensional tolerance is absorbed by the elastic contact of the sign key forming element 60 with the second key groove 41, the sign key forming element 60 can be easily manufactured.

Since the code key forming element 60 having a shape complementary to the second key groove 41 is fitted in the dovetail shape with the second key groove 41 having the dovetail shape, the code is formed. The key forming element 60 is prevented from dropping from the second key groove 41 in the height direction of the code key forming element 60.

As shown in FIG. 8A, the second keyway 4 of the second code key 40 of the cable-side female connector 30 is provided.
1, the second key flat portion 67 and the second fitting convex portion 72
The first key protruding portion 26, the first key flat portion 22, and the first key groove portion 24 of the first code key 20 of the board-side male connector 10 are respectively fitted. FIG. 8B shows another code key pattern. As in FIG. 8A, the concave, convex, and flat portions of the second code key 40 of the cable-side female connector 30 are respectively formed on the substrate. Side male connector 10
The first sign key 20 is fitted with the convex part, the concave part and the flat part.

The relationship between the code key forming element 60 and the second keyway 41, which are dimensioned as described above, will be described.

Since the width of the code key forming element 60 is larger than the width of the second key groove 41, the code key forming element 60 is press-fitted into the second key groove 41. For example, the code key forming element 60 and the second keyway 41
Is 2.1 mm and 1.4 mm, respectively, then 2.1 ÷ 1.4 = 1.5, so the press-fit margin is 50%. The press-fit margin is preferably 40 to 80%.

The locking portion shown in FIGS. 3 and 5 is of a rib flat spring type having a rib 68 protruding from the outer surface of the flat side wall 63, but various other configurations are possible. . For example, a curved plate spring type in which a through hole 66 is provided at the center of the base insertion portion 62 and the side wall 63 is curved outward can be used. Further, the second keyway 4 is provided without providing the through hole 66 at the center of the base end insertion portion 62.
It may be a rigid type one size larger than one.

The rib flat spring type is usually 5 to
It can be press-fitted into the second key groove 41 with a force of 25N, and preferably, it is press-fitted with a force of 15N. In the case of the rigid type, the second keyway 4 is formed with a force of 7 to 30N.
1 and can be press-fitted and inserted, preferably with a force of 10N. This means that the code key forming element 60
This is because when the press-fitting insertion is performed with a force larger than N, the proximal insertion portion 62 is easily damaged. Code key forming element 60 is 5N
When press-fitting with a smaller force, the code key forming element 60
Is easy to come out of the second key groove 41. If the press-fitting force does not change with time, the second keyway 4
1 serves as a holding force for the code key forming element 60.

The second code key 4 described in the present embodiment
Numeral 0 denotes a type in which the code key forming element 60 is press-fitted and inserted into each of the second key grooves 41, but various known methods such as mechanical fitting or bonding can be used.

Although the illustrated insertion groove 42 has a rectangular shape having a smaller cross section than the locking groove, the insertion groove 42 may have a dovetail shape similar to the locking groove 44. Even in this case, the boundary between the insertion groove 42 and the locking groove 44
A stopper surface 46 is formed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a conventional board side male connector and a cable side female connector.

FIG. 2 is a perspective view of a board-side male connector and a cable-side female connector according to the present invention.

FIG. 3 is a perspective view of a code key forming member according to the present invention.

FIG. 4 is an explanatory diagram showing a state in which a code key forming element is inserted into a groove of a cable-side female connector using the code key forming member shown in FIG. 3;

FIG. 5 is a bottom view of the code key forming element according to the present invention.

FIG. 6 is a cross-sectional view of the second female connector on the cable side shown in FIG. 2;
FIG. 11 is a partial cross-sectional view showing a state where a second code key forming element is inserted into a code key groove.

FIG. 7 shows a second connector of the female connector on the cable side in FIG.
It is the elements on larger scale which showed the code key periphery typically.

FIG. 8 is an explanatory view showing a fitted state between a first code key of the male connector on the board side and a second code key of the female connector on the cable side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Board side male connector (1st connector) 12 Board 14 Housing 16 Conductive pin 20 1st sign key 22 1st key flat part 24 1st key groove part 26 1st key protrusion 30 Cable side female connector (2nd connector) Reference Signs List 34 housing 36 terminal hole 40 second sign key 41 second key groove 42 locking groove 44 insertion groove 46 stopper surface 50 sign key forming member 54 gripping part 58 notch (break part) 60 sign key forming element 62 base end inserting part 63 Side wall (locking portion) 65 Stopper portion 64 Tip insertion portion 66 Through hole 67 Second key flat portion 68 Rib (locking portion) 70 Tip portion 72 Fitting convex portion 74 Insertion base portion

Claims (7)

[Claims] When the first connector (10) having the first code key (20) and the second connector (30) having the second code key (40) are fitted, the first code key (20) is fitted. 20) and a code key structure of a connector in which the second code key (40) is fitted. In the second connector (30), both connectors (1
At least one keyway (41) extending in the fitting direction of (0, 30) is arranged side by side on at least one side wall surface of the housing (34). By inserting the key forming element (60), the second code key (4
0) has a complementary shape to the first code key (20). 2. The key groove (41) includes a dovetail-shaped locking groove (42) and an insertion groove (44) having a rectangular cross section smaller than the locking groove (42). The code key forming element (60) is provided in the insertion groove (44).
A distal end insertion portion (64) having a complementary shape to the front end insertion portion (64), and a proximal end insertion portion (62) connected to the distal insertion portion (64) in a direction opposite to the insertion direction and complementary to the locking groove (42). The code key structure for a connector according to claim 1, wherein the code key structure comprises: 3. The base insertion portion (62) has a through hole (66) extending in the insertion direction at the center thereof, and protrudes outward to engage with a side surface of the locking groove (42). A mating locking portion (63, 68) on at least one side surface, the locking of the code key forming element (60) when the code key forming element (60) is inserted into the key groove (41). The code key structure for a connector according to claim 2, wherein the portion (63, 68) elastically abuts a side surface of the locking groove (42). 4. A connector having the key structure according to claim 1. 5. The connector according to claim 4, wherein said connector is a cable-side female connector (30). 6. A first connector (10) provided on a first connector (10).
A dovetail-shaped key provided on the second connector (30) so that the second code key (40) provided on the second connector (30) complementarily fits with the code key (20). Code key forming element (6) inserted into groove (41)
0), wherein the code key forming element (60) is provided with the key groove (41).
And a base insertion portion (62) having a complementary shape to the base insertion portion (62). The base insertion portion (62) has a fitting protrusion (24) thereon, and has a central portion extending in the insertion direction. A locking portion (63, 63) having a through hole (66) and projecting outward on at least one side surface and engaging with the side surface of the key groove (41).
68), and when the base insertion portion (62) is inserted along the key groove (41), a second code key (40) having a complementary shape to the first code key (20) is formed. A code key forming element. 7. The code key forming element according to claim 6, wherein
0) and a grip portion (54) connected to the code key forming element (60).
A sign key forming member having a break portion (58) at a boundary between the grip portion (0) and the grip portion (54).