JP3043306U - Key attachment structure for preventing incorrect mating in electrical connectors - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To prevent incorrect mating in an electrical connector, in which an incorrect mating prevention key is securely engaged with an insulating housing and does not come off, and can be repeatedly mounted. It is intended to provide a key mounting structure. A misfit preventing key (11) has a key plate portion (19).
Engaging legs 20 are provided to extend rearward on both sides of the rear end, engaging protrusions 21 are formed on the outside of the free ends of the engaging legs 20, and fitting protrusions are formed on both side edges of the intermediate portion of the key plate portion 19. 22 is formed. Insulation housing 12 of electrical connector 10
Is the fitting surface 12c of the electrical connector 10 on the outer wall surface 12b.
Guide ridges 17 extending rearward from are provided facing each other at intervals substantially equal to the width of the key plate portion 19. The engagement protrusion 21 formed on the engagement leg 20 of the mis-fitting prevention key 11 engages with the rear end 17b of the guide protrusion 17, and the engagement protrusion 22 formed on the key plate portion 19 forms the guide protrusion 17. It is fitted and attached to a receiving groove 18 formed in cooperation with the outer wall surface 12b of the insulating housing 12 on the fitting surface side.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to an erroneous mating prevention key mounting structure that is mounted on an insulating housing of an electrical connector to prevent erroneous mating of a mating electrical connector.

[0002]

[Prior art]

 Conventionally, to prevent the wrong mating partner of the electrical connector from being selected and causing malfunction or destruction of the electric circuit or electronic circuit, a key for preventing mis-mating is provided in the insulation housing that constitutes the electrical connector. Is provided so that only the specified mating electrical connector can be fitted. This mis-mating prevention key is generally installed later in the insulating housing of the completed electrical connector, so that even with multiple electrical connectors of the same structure, the presence or absence of mis-mating prevention keys and changes in the arrangement This allows the individual electrical connectors to be distinguished.

FIG. 13 shows an example of a structure for attaching a conventional mis-fitting prevention key to an insulating housing. As shown in the figure, the protrusions 2 are provided on both side edges of the mis-fitting prevention key 1. On the other hand, the insulating housing 3 is provided with a groove 6 which allows the projecting piece 2 to be fitted to the engaging wall 5 provided by projecting on the outer wall 4, and the projecting piece 2 is press-fitted into the groove 6. I was installing it. The incorrect fitting prevention key 1 has a structure in which it is held only by the friction between the protruding piece 2 and the groove 6.

[0004]

[Problems to be solved by the device]

 As illustrated above, the conventional misfitting prevention key mounting structure has a problem that the misfitting prevention key is easily removed. If the incorrect mating prevention key were removed, the identification provided to the electrical connector would be lost, and the function of preventing the incorrect mating of the mating electrical connector would be lost. Further, as the incorrect mating prevention key is repeatedly attached and removed, the holding force of the friction engagement portion is lost or the friction engagement structure itself (the engagement wall 5 in FIG. 13) is separated. In some cases, it became impossible to install the key for preventing incorrect mating.

The present invention has been made in view of the above problems, and it is possible to prevent the mis-fitting prevention key from securely engaging the insulating housing and coming off, and also to cope with repeated mounting. It is an object of the present invention to provide a mounting structure for a key for preventing incorrect mating in an electrical connector.

[0006]

[Means for Solving the Problems]

 The present invention that achieves the above object has a structure in which an incorrect fitting prevention key is attached to an insulating housing of an electrical connector. The incorrect fitting prevention key has engaging legs extending rearward on both sides of the rear end of the key plate portion. The engaging projection is formed on the outside of the free end of the engaging leg, and the fitting projections are formed on both side edges of the intermediate portion of the key plate portion. Guide ridges extending rearward from the fitting surface of the electrical connector are provided on the outer wall so as to face each other at intervals substantially equal to the width of the key plate portion, and are formed on the engaging legs of the erroneous fitting prevention key. Receiving formed by the engaging projection that engages with the rear end of the guide projection, and the fitting projection that is formed on the key plate part is formed on the fitting surface side of the guide projection in cooperation with the outer wall surface of the insulating housing. Prevents mis-mating in electrical connectors characterized by being fitted in the groove. It is a mounting structure of the use key.

Further, in such an attachment structure, the guide protrusion has a taper surface opposed to the engagement protrusion on the side wall of the electric connector on the side of the fitting surface. This is a structure for mounting a mis-fitting prevention key in an electrical connector in which the engaging legs can be curved inward when mounting.

In addition, with such a mounting structure, the erroneous fitting prevention key is erroneous in an electrical connector that is installed by projecting the front side of the key plate portion forward of the fitting surface of the insulating housing. It is a fitting prevention key attachment structure.

Further, in such an attachment structure, a plurality of pairs of guide ridges of the insulating housing are provided for one electric connector, and the mis-fitting prevention key is selected from a plurality of pairs of guide ridges. It is a structure for mounting a misfit prevention key in an electrical connector that is mounted between a pair of guide ridges.

Further, in such an attachment structure, a plurality of pairs of guide ridges is a structure for attaching an erroneous mating prevention key in an electrical connector in which adjacent guide ridges are integrally formed. is there.

[0011]

[Action]

 According to the present invention, the fitting protrusion of the mis-fitting prevention key is fitted into the receiving groove on the insulating housing side, and the engagement projection provided on the mis-fitting prevention key is guided on the insulating housing side. Since the mounting structure is engaged with the rear end of the ridge, the mis-fitting prevention key can be firmly mounted on the insulating housing, and there is no risk of it coming off. Also, because the holding structure is engaged with each other instead of only by friction, it is possible to eliminate the possibility of being unable to mount due to wear or damage even if the wrong fitting prevention key is repeatedly attached and removed. it can.

[0012]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIGS. 1 and 2 are enlarged views of the electrical connector 10 shown in FIGS. 3 to 6, in which a portion to which a mis-fitting prevention key 11 is attached is taken out. The mis-fitting prevention key 11 has the structure shown in FIGS. The electrical connector 10 is mounted in the insulating housing 12 and in the insulating housing 12 at a predetermined pitch in the longitudinal direction (left and right direction in FIG. 3) and the height direction (up and down direction in FIG. 3). It is composed of a large number of terminals 13. The tail portion 14 of each terminal 13 goes out from the rear end 12a of the insulating housing 12, the portions of the solder tails 15 hang down at a right angle, and the guide plates 16 are attached to hold the positions of these solder tails 15. ing.

In FIGS. 1 and 2, reference numeral 17 is a guide protrusion provided on the bottom surface 12 b of the insulating housing 12 for the mis-fitting prevention key 11. As shown in FIG. 4, a plurality of pairs of the guide ridges 17 face the bottom surface 12b of the insulating housing 12 from the fitting surface 12c of the insulating housing 12 toward the rear end 12a at predetermined intervals. The guide ridges 17 adjacent to each other are integrated, and have a width twice that of the guide ridges 17 provided on both sides of the insulating housing 12. The guide ridge 17 has a rectangular columnar shape and has three tapered side surfaces 17a on the fitting surface 12c side of the insulating housing 12 and an insulating part on the fitting surface 12c side. The receiving groove 18 is formed in cooperation with the outer surface of the bottom wall of the housing 12, that is, the bottom surface 12b.

The mis-fitting prevention key 11 is provided with engaging legs 20 extending from both sides of the rear end of the key plate portion 19 having a width W substantially equal to the facing interval of the guide ridges 17. An engaging protrusion 21 is formed outside the free end of 20. The key plate portion 19 also has square fitting protrusions 22 formed on both side edges of the middle portion thereof. This key plate portion 19 allows only a particular electrical connector of the other side to be fitted, and prevents mis-mating of other electrical connectors, and is approximately the same in the width direction (vertical direction in FIG. 7). One half portion 19a is formed thicker than the other portion 19b, and the surface 23 of the key plate portion 19 has a stepped shape (see FIGS. 10 and 11).

The mis-fitting prevention key 11 having the above-described shape is slid with respect to the electrical connector 10 along the bottom surface 12b from the fitting surface 12c side of the insulating housing 12 toward the rear end 12a. To install. The engaging legs 20 extending from the key plate portion 19 are directed toward the rear end 12a of the insulating housing, and the stepped surface 23 of the key plate portion 19 formed by varying the thickness is placed outside. When the mis-fitting prevention key 11 is attached in this manner, first, the engaging protrusion 21 formed on the outer side of the free end of the engaging leg 20 faces the tapered surface 17a of the guide protrusion 17, so that the sliding protrusion is followed. , The engagement leg 20 is curved inward. When the slide is further advanced, the engagement protrusion 21 reaches the rear end 17b of the guide protrusion 17, the curvature of the engagement leg 20 is released, and the original state is restored, and the engagement protrusion 21 moves the guide protrusion 21. It engages with the rear end 17b of the member 17 oppositely. At the same time, the fitting projections 22 formed on both side edges of the key plate portion 19 are formed on the fitting surface 12c side of the guide projection 17 in the receiving groove 18 formed in cooperation with the outer wall of the insulating housing 12. (See FIGS. 1 and 2). In this state, the mis-fitting prevention key 11 has the engagement projection 21 engaged with the rear end 17b of the guide projection 17, and the fitting projection 22 fitted in the receiving groove 18, The attached state is securely retained, and it is prevented from accidentally slipping out or coming off. If the engaging leg 20 is forcibly curved inward by an appropriate tool and the engaging projection 21 and the rear end 17b of the guide projection 17 are disengaged, the entire misfit preventing key 11 is insulated. Since it can be slid toward the fitting surface 12c of 12, the erroneous fitting prevention key 11 can be easily removed. Therefore, repeated attachment and detachment of the incorrect fitting prevention key 11 can be dealt with without any problem.

As shown in FIGS. 1 and 2, in the state where the mis-fitting prevention key 11 is attached to the insulating housing 12, the front side of the key plate portion 19 is closer to the fitting surface 12 c of the insulating housing 12. It projects forward. Therefore, when the mating electric connector is fitted, the mis-fitting prevention key 11 first identifies the mating electric connector. That is, it is discriminated whether or not the erroneous fitting prevention key (not shown) of the mating electric connector is provided with a portion adapted to the key plate portion 19. Therefore, it is possible to surely prevent incorrect fitting.

As shown in FIG. 4, a plurality of pairs of guide ridges 17 are provided on the bottom surface 12 b of the insulating housing 12 to prevent the mis-fitting between any selected guide ridges 17. This is because the key 11 is attached. By changing the mounting pattern of the mis-fitting prevention key 11, even if the same electrical connector 10 is used, each of them can be made a different electrical connector 10 so that mis-fitting can be individually prevented. It is possible. The guide ridges 17 are provided at both ends of the insulating housing 12, whereas the intermediate ridges are formed to have a double width. It is also possible to attach the fitting prevention key 11. Therefore, the number of attachment patterns of the mis-fitting prevention key 11 can be widened, which is suitable when a large number of electrical connectors 10 are used at the same time.

In the figure, 24 is a printed circuit board on which the electrical connector 10 is mounted, 25 is a guide boss provided on the bottom surface 12b of the insulating housing 12, and 26 is a mounting boss.

[0020]

[Effect of the invention]

 As described above, according to the mis-mating prevention key mounting structure of the present invention, the mis-mating prevention key is securely attached and is not likely to come off. The effect is that the electric connector can be always exhibited, and the electric connector and the electric and electronic circuits connected to the electric connector can be surely protected.

According to the mounting structure of the second aspect, the effect that the mounting can be easily carried out can be obtained only by sliding the erroneous fitting prevention key along the bottom surface of the insulating housing.

According to the mounting structure of the third aspect, since the key plate portion of the erroneous mating prevention key projects forward of the mating surface of the insulating housing, when the electrical connectors are mated with each other, erroneous The effect that the action of the fitting prevention key can be first exerted is obtained.

Further, according to the mounting structure of claim 4, various mounting patterns of the mis-fitting prevention key are possible, which is suitable when a large number of electric connectors are used at the same time.

According to the mounting structure of claim 5, the outer wall surface of the insulating housing provided with the guide ridges can be effectively used to enable setting of a mounting pattern for a large number of misfitting prevention keys. effective.

[Brief description of the drawings]

FIG. 1 is an enlarged bottom view of a part of an electrical connector having a wrong fitting prevention key according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of the electric connector to which the mis-fitting prevention key of the embodiment is also attached.

FIG. 3 is a front view of the electric connector before a wrong fitting prevention key is attached.

FIG. 4 is a bottom view of the electric connector in a state before the mis-fitting prevention key is also attached.

FIG. 5 is a plan view of the electric connector before the mis-fitting prevention key is attached.

FIG. 6 is likewise a side view of the electric connector before a misfitting prevention key is attached.

FIG. 7 is a plan view of an incorrect fitting prevention key according to an embodiment of the present invention.

FIG. 8 is a front view of the incorrect fitting prevention key of the embodiment.

FIG. 9 is a bottom view of the wrong fitting prevention key of the embodiment.

FIG. 10 is a side view of the mis-fitting prevention key as viewed from the left side of FIG. 9.

FIG. 11 is a side view of the mis-fitting prevention key as viewed from the right side of FIG. 9.

FIG. 12 is a sectional view of the mis-fitting prevention key of the embodiment.

FIG. 13 is a diagram illustrating a conventional mounting structure for a mis-fitting prevention key.

[Explanation of symbols]

 10 Electrical Connector 11 Key for Preventing Incorrect Fitting 12 Insulation Housing 12a Rear End of Insulation Housing 12b Bottom Surface of Insulation Housing 12c Insulation Housing Mating Surface 13 Terminal 14 Terminal Tail Part 15 Solder Tail 16 Guide Plate 17 Guide Protrusion 17a Guide Protrusion Tapered surface of the strip 17b Rear end of the guide projection 18 Receiving groove 19 Key plate part 19a One part of the key plate part 19b The other part of the key plate part 20 Engaging leg 21 Engaging projecting piece 22 Fitting projecting piece 23 Key plate Part surface 24 Printed circuit board 25 Guide boss 26 Mounting boss

Claims (5)

[Utility model registration claims] 1. An insulating housing 1 for an electrical connector 10.
In the structure in which the mis-fitting prevention key 11 is attached to 2, the mis-fitting prevention key 11 is provided with the engaging legs 20 extending rearward on both sides of the rear end of the key plate portion 19, and the free ends of the engaging legs 20 are provided. An engaging projection 21 is formed on the outside, and the key plate portion 19
Fitting protrusions 22 are formed on both side edges of the intermediate portion of the electric connector 10.
The guide protrusions 17 extending rearward from the fitting surface 12c of the electric connector 10 are provided in b so as to face each other at intervals substantially equal to the width of the key plate portion 19. The engaging projection 21 formed on the compound leg 20 engages with the rear end 17b of the guide projection 17, and the fitting projection 22 formed on the key plate portion 19 is provided on the fitting surface side of the guide projection 17 on the insulating housing 12 side. A fitting structure for a wrong fitting prevention key in an electric connector, which is fitted and fitted in a receiving groove 18 formed in cooperation with the outer wall surface 12b of the above. 2. The guide ridge 17 includes an electrical connector 10.
A tapered surface 17a facing the engaging protrusion 21 is formed on the side wall of the fitting surface of the engaging leg 20 so that the engaging leg 20 can be curved inward when the incorrect fitting preventing key 11 is attached. A structure for mounting a key for preventing incorrect fitting in the electrical connector according to Item 1. 3. The incorrect fitting prevention key 11 comprises a key plate portion 1
The mounting structure for the mis-fitting prevention key in the electrical connector according to claim 1, wherein the front side of 9 is mounted so as to project forward from the fitting surface 12c of the insulating housing 12. 4. The guide projection 17 of the insulating housing 12
Are provided in a plurality of pairs for one electric connector 10, and the mis-fitting prevention key 11 is provided in
The mounting structure for the mis-fitting prevention key in the electrical connector according to claim 1, wherein the mounting structure is provided between the selected pair of guide ridges 17. 5. The plurality of pairs of guide ridges 17 are formed integrally with the guide ridges 17 adjacent to each other.
A structure for mounting a key for preventing incorrect mating in the electrical connector described in.