JP4335039B2 - Single waterproof crimp connector and assembly method thereof - Google Patents

Description

  The present invention relates to a single waterproof crimp connector used for a machine tool, a robot, or the like, and particularly to a connection structure of each insert having a waterproof structure.

  Conventional single-piece waterproof receptacle connectors having a plurality of pin contacts have mainly used soldered pin contacts as shown in FIGS. This conventional example will be described with reference to the drawings. FIG. 5 shows the assembled state, FIG. 5 (a) is a front view, and FIG. 5 (b) is a side sectional view. FIG. 6 is a side sectional view of a single component part of the receptacle connector. 5 and 6, reference numeral 91 denotes a receptacle shell. A flange 91a is provided with a mounting hole 91b, and other than the flange 91a is formed in a cylindrical shape. The outer periphery of the cylindrical portion on the connection side with the plug is shown in FIG. A screw portion 91c that is screwed with a screw portion provided on the inner peripheral surface of the coupling shell (not shown) is provided. For example, an aluminum alloy is used as the material of the receptacle shell. Reference numeral 92 denotes a rear insert, and reference numeral 93 denotes an intermediate insert, each of which is made of, for example, an insulating synthetic resin, and is provided with a plurality of pin contact insertion holes 92a and 93a described later.

  Reference numeral 94 denotes a front insert, which is made of synthetic rubber such as silicon rubber, and is provided with a plurality of pin contact insertion holes 94a as in the case of the intermediate insert 93. The inner diameter of the insertion hole 94a is a pin contact. It is formed slightly smaller than the outer diameter. Reference numeral 95 denotes a soldering pin contact, which is made of, for example, a copper alloy, and a connecting portion (soldering portion) 95a is formed at the rear end thereof. Reference numeral 951 denotes a ground pin contact. Reference numeral 96 denotes a retainer ring, which is made of, for example, a copper alloy, and bent portions 96a for attaching / detaching operations to the receptacle shell 91 are formed at both ends thereof. A gasket made of synthetic rubber or the like is attached to the flange 91a of the receptacle shell 91, but is omitted here.

  In the assembly of the receptacle connector, a plurality of solder pin contacts 95 are inserted into the respective insertion holes 92a of the rear insert 92 from the rear, and then the intermediate insert 93 and the front insert 94 are inserted from the front of the solder pin contacts 95. The holes 93a and 94a are inserted and sequentially attached. However, since the inner diameter of the insertion hole 94a of the front insert 94 is slightly smaller than the outer diameter of the portion where the socket contact of the soldering pin contact 95 is fitted as described above, the soldering pin contact 95 is attached by press fitting. This press-fit state has a waterproof function. The insert assembly thus assembled is mounted on the receptacle shell 91 from behind, and then the retainer ring 96 is mounted in the retainer ring mounting groove of the receptacle shell 91 to fix the insert assembly to the receptacle shell 91.

  However, since the above-described receptacle connector uses the soldering pin contact 95 which is a type in which the pin contact is incorporated in a component state, there is no particular problem. However, when the crimp pin contact is used for the pin contact, the crimp pin contact is not used. This is a so-called rear release structure in which a connection line is connected and then inserted from the rear insert side provided with contact retention. Therefore, when the crimp pin contact is press-fitted to the front insert 94 assembled on the front side of the intermediate insert 93, the insertion hole portion of the front insert 94 is pushed up by the tip of the crimp pin contact, and is lifted from the intermediate insert 93. As a result, there was a problem that assembly was not easy.

If the crimp pin contact is assembled at the receptacle connector assembly factory, it is conceivable to assemble it using a jig that holds the periphery of each insertion hole 94a of the front insert 94 on the front side of the front insert 94. The crimp pin contact to which the wire is connected is assembled at the site where the receptacle connector is used. Therefore, it is required that the crimp pin contact is easily assembled and is securely press-fitted to the front insert 94. Therefore, the present applicant has proposed a single waterproof connector 90 configured as shown in Patent Document 1.
Japanese Patent No. 32741979 is a single waterproof connector used in industrial machines and the like. The claims of Japanese Patent No. 3274799 include a receptacle shell, an intermediate insert made of an insulating material having an insertion hole for a plurality of crimp pin contacts and attached to the receptacle shell, and the same number of crimp pins as the intermediate insert It has a contact insertion hole, and has a front insert made of an insulating elastic body integrally formed on the adhesive-coated surface on the front side of the intermediate insert, and the same number of crimp pin contact insertion holes as the intermediate insert. And a rear insert made of an insulating material provided with contact retention in the insertion hole and attached to the rear surface of the intermediate insert, a retainer ring for fixing the intermediate insert, the front insert and the rear insert to the receptacle shell, Intermediate inserter , Simple waterproof crimp connector comprising a crimp pin contacts to be mounted on the front insert and insert configured Riaririzu structure from rear insert is disclosed.

In recent years, demands for downsizing machine tools, control panels, and the like have become even stronger. Under such circumstances, the contact pitch of a single waterproof connector having a rear release structure as in Patent Document 1 has been reduced. Thus, it is difficult to apply the adhesive only to the adhesive application surface other than the insertion hole on the front side of the intermediate insert, and the adhesive may enter the insertion hole, which may hinder the assembly of the connector.
Moreover, in the single waterproof connector of the rear release structure as in Patent Document 1, since the adhesive is applied only to the adhesive application surface other than the insertion hole on the front side of the intermediate insert, it takes time to apply and the assembly is performed. It was cumbersome and led to increased costs.

  The present invention has been made in view of such a conventional problem, and provides a single release connector having a rear release structure that can be easily assembled even when the pitch is narrowed and does not increase the cost. It is.

The object is to provide the receptacle shell 60, the intermediate insert 30 having the insertion holes 32 of the plurality of crimp pin contacts 50 and made of an insulating material to be attached to the receptacle shell 60, and the same number of crimp pin contacts 50 as the intermediate inserts 30. A front insert 20 made of an insulating elastic body held on the front side of the intermediate insert 30, and insertion holes 42 for the same number of crimp pin contacts 50 as the intermediate insert 30. 42 is provided with contact retention, and a rear insert 40 made of an insulating material attached to the rear surface of the intermediate insert 30, and a retainer ring 70 for fixing the intermediate insert 30, the front insert 20 and the rear insert 40 to the receptacle shell 60. In the single waterproof crimp connector 10 including a crimp pin contact 50 attached to an insert having a rear release structure constituted by the intermediate insert 30, the front insert 20 and the rear insert 40, the front insert 20 or the intermediate insert 30 is provided. At least one engagement protrusion 24 that protrudes toward the intermediate insert 30 or the front insert 20 is provided, and an extending portion 27 is provided at the tip of the engagement protrusion 24, so that the intermediate insert 30 or the front insert 20 is provided. said locking means provided at a position corresponding to the engaging projection 24 of the front insert 20 or the intermediate insert 30, the front insert 20 or the intermediate insert by pulling the extension portion 27 to the The engagement protrusion 24 of 30 is engaged with the intermediate insert 30 or the front insert 20, and after the engagement, the extending portion 27 is cut, and the metal crimp pin contact 50 is inserted. This can be achieved by providing at least one or more ring-shaped convex portions 29 in the insertion hole 22 of the front insert 20.

As the locking means, the intermediate insert 30 or the front insert 20 is provided with a locking portion that engages with the engagement protrusion 24 at a position corresponding to the engagement protrusion 24 of the front insert 20 or the intermediate insert 30. .
As the locking means, the intermediate insert 30 is provided with a locking hole 34 that engages with the engagement protrusion 24 at a position corresponding to the engagement protrusion 24 of the front insert 20, and the rear insert 40 has the A relief portion 44 of the engagement protrusion 24 is provided at a position corresponding to the engagement protrusion 24 of the front insert 20.

  The engagement protrusions 24 are provided at five locations at the center of the front insert 20 and at intervals of 90 degrees. By disposing the engaging protrusions 24 in this way, the intermediate insert 30 can be evenly connected to the front insert 20.

In the single waterproof crimp connector 10 having the above structure, the engaging protrusion 24 of the front insert 20 cannot be easily engaged when engaged with the intermediate insert 30. If the hardness of the front insert 20 is increased, the engaging protrusion 24 cannot be engaged with the engaging hole 34 of the intermediate insert 30 (the engaging protrusion 24 may be damaged if forced to insert). On the contrary, if the hardness is softened, the holding force between the front insert 20 and the intermediate insert 30 is lowered, and a stable holding force cannot be obtained. I thought of a way.
First, in the method of assembling the single waterproof crimp connector 10 having the above structure , the extending portion 27 is provided at the tip of the engaging projection 24, and the engaging projection 24 of the front insert 20 is pulled by pulling the extending portion 27. The extended portion 27 is cut after being engaged with the intermediate insert 30 and being engaged.
In addition, a notch is provided between the distal end of the engaging protrusion 24 and the extending portion 27, and after the engaging protrusion 24 of the front insert 20 is engaged with the intermediate insert 30, the extending portion is simply pulled. The part 27 is cut off.

As is clear from the above description, according to the single waterproof connector 10 of the present invention, the following excellent effects can be obtained.
(1) An intermediate insert 30 made of an insulating material having an insertion hole 32 for the receptacle shell 60 and a plurality of crimp pin contacts 50 and attached to the receptacle shell 60, and the same number of crimp pin contacts 50 as the intermediate inserts 30. A front insert 20 made of an insulating elastic body held on the front side of the intermediate insert 30, and insertion holes 42 for the same number of crimp pin contacts 50 as the intermediate insert 30. 42 is provided with contact retention, and a rear insert 40 made of an insulating material attached to the rear surface of the intermediate insert 30, and a retainer ring 70 for fixing the intermediate insert 30, the front insert 20 and the rear insert 40 to the receptacle shell 60. When In the single waterproof crimp connector 10 having a crimp pin contact 50 attached to an insert having a rear release structure composed of the intermediate insert 30, the front insert 20 and the rear insert 40, the front insert 20 or At least one engaging protrusion 24 protruding toward the intermediate insert 30 side or the front insert 20 side of the intermediate insert 30 is provided, and the front insert is provided on the intermediate insert 30 or the front insert 20 as the locking means. 20 or a position of the intermediate insert 30 corresponding to the engaging protrusion 24 is provided with a locking portion that engages with the engaging protrusion 24, so that it is necessary to apply an adhesive even if the pitch is narrowed. Not for cost Without leading to-up, it can be easily connected to the intermediate insert 30 and said front insert 20.
(2) The receptacle shell 60, the intermediate insert 30 made of an insulating material having the insertion holes 32 for the plurality of crimp pin contacts 50 and attached to the receptacle shell 60, and the same number of crimp pin contacts 50 as the intermediate inserts 30. A front insert 20 made of an insulating elastic body held on the front side of the intermediate insert 30, and insertion holes 42 for the same number of crimp pin contacts 50 as the intermediate insert 30. 42 is provided with contact retention, and a rear insert 40 made of an insulating material attached to the rear surface of the intermediate insert 30, and a retainer ring 70 for fixing the intermediate insert 30, the front insert 20 and the rear insert 40 to the receptacle shell 60. When In the single waterproof crimp connector 10 including a crimp pin contact 50 attached to an insert having a rear release structure constituted by the intermediate insert 30, the front insert 20 and the rear insert 40, the front insert 20 is used as the engaging means. At least one engaging protrusion 24 protruding toward the intermediate insert 30 is provided, and the engaging protrusion is provided at a position corresponding to the engaging protrusion 24 of the front insert 20 on the intermediate insert 30 as the locking means. 24 is provided, and the rear insert 40 is provided with a relief portion 44 of the engagement protrusion 24 at a position corresponding to the engagement protrusion 24 of the front insert 20, so that the pitch is narrow. Increased cost because it is not necessary to apply adhesives Without lead, easily the can be connected with the intermediate insert 30 and said front insert 20 can have a sufficient strength to the engaging projection 24.
(3) Since the engagement protrusions 24 are provided at the center of the front insert 20 and at five positions at intervals of 90 degrees, the intermediate insert 30 can be connected to the front insert 20 evenly and reliably.
(4) Since at least one or more ring-shaped convex portions 29 are provided in the insertion hole 22 of the front insert 20 into which the crimp pin contact 50 is inserted, and the crimp pin contact 50 portion has a waterproof structure. Each pin contact 50 can have a waterproof structure, and the entire connector can be easily waterproofed.
(5) Since the front insert 20 is formed of an elastic body, the protrusion 29 is crushed when the crimp pin contact 50 is inserted into the insertion hole 22 of the front insert 20, and the crimp pin contact 50 is easily formed. Can be inserted and can be easily waterproofed.

(6) In the assembling method of the single waterproof crimp connector 10 having the above structure , the extending portion 27 is provided at the tip of the engaging protrusion 24, and the extending portion 27 is pulled to engage the engaging protrusion 24 of the front insert 20. Is engaged with the intermediate insert 30, and the extended portion 27 is cut after the engagement, so that the engagement protrusion 24 of the front insert 20 and the intermediate insert 30 can be easily engaged with each other. As well as being able to obtain a predetermined holding force, the engagement protrusion 24 is not damaged and can be easily engaged without a jig.
(7) In the method of assembling the single waterproof crimp connector 10 having the above structure , a notch is provided between the distal end of the engaging protrusion 24 and the extending portion 27, and the engaging protrusion 24 of the front insert 20 is connected to the intermediate portion. Since the extended portion 27 is cut only by further pulling after engaging with the insert 30, the extended portion 27 can be easily cut without a jig.

The single waterproof connector 10 of the present invention will be described based on the drawings.
FIG. 1A is a perspective view of a single waterproof connector viewed from the fitting side, and FIG. 1B is a perspective view of the single waterproof connector viewed from the connection side. 2A is a perspective view of the front insert, the intermediate insert, the rear insert, and the crimp contact as viewed from the fitting side, and FIG. 2B is a perspective view of the front insert, the intermediate insert, the rear insert, and the crimp contact as viewed from the connection side. FIG. 3A is a cross-sectional view of the insertion hole of the crimp pin contact and the ground contact in a state in which the front insert, the intermediate insert, and the rear insert are assembled, and FIG. 3B is the front insert, the intermediate insert, and the rear insert. It is sectional drawing of the insertion hole of a crimp pin contact and a ground contact in the state which inserted the crimp pin contact and the ground contact.
The single waterproof connector 10 of the present invention includes a receptacle shell 60, an intermediate insert 30, a front insert 20, a rear insert 40, a retainer ring 70, and a crimp pin contact 50.

  Before describing the structure of the component parts, the main features of the present invention will be described. The main object of the present invention is to provide a single waterproof connector 10 in which the front insert 20 and the intermediate insert 30 are not separated when the crimp pin contact 50 is attached to an insert having a rear release structure. 20 or the intermediate insert 30 is provided with an engaging means on the intermediate insert 30 side or the front insert 20 side, and the other insert contacting the insert provided with the engaging means is engaged with the engaging means. Means are provided. That is, the front insert 20 or the intermediate insert 30 is provided with at least one engagement protrusion 24 that protrudes toward the intermediate insert 30 or the front insert 20, and the front insert 20 is provided on the intermediate insert 30 or the front insert 20. An engaging portion that engages with the engaging protrusion 24 is provided at a position corresponding to the engaging protrusion 24 of the insert 20 or the intermediate insert 30. The rear release structure is a structure in which the crimp pin contact 50 is inserted and fixed from the rear insert 40 side.

Hereinafter, the structure of each component will be described with reference to the drawings.
First, the front insert 20 which is the point of this invention is demonstrated. The front insert 20 is an elastic body, and is manufactured by a known transfer molding or compression molding. These materials are appropriately selected in consideration of dimensional stability, workability, cost, etc., but chloroprene rubber or ethylene Examples include propylene rubber and silicon rubber. The front insert 20 has a substantially cylindrical shape, and is provided with a plurality of insertion holes 22 into which the crimp pin contacts 50 are inserted. The size of the insertion hole 22 is about 0.1 to 0.4 mm smaller than the crimp pin contact 50, and at least one ring is inserted into the insertion hole 22 of the front insert 20 into which the crimp pin contact 50 is inserted. When the crimp pin contact 50 is inserted into the insertion hole 22, the crimp pin contact 50 is crushed by the crimp pin contact 50, so that the crimp pin contact 50 portion has a waterproof structure. The size of the convex portion 29 is appropriately designed in consideration of the role of a waterproof structure, the ease of insertion of the crimp pin contact 50 and the formability, but in this embodiment, the size of the convex portion 29 is made to protrude by about 0.15 to 0.2 mm. ing. The number of the convex portions 29 is set to two in this embodiment for the purpose of reliable waterproofing and quality stability.

The periphery of the insertion hole 22 of the front insert 20 on the fitting opening 62 side is projected in a columnar shape to increase the edge distance as shown in FIG. 2A, and the insertion on the opposite side (connection side) is performed. As shown in FIG. 2B, the periphery of the hole 22 is recessed by one step and protruded in a cylindrical shape in order to increase the edge distance.
In the present embodiment, as shown in FIG. 2, the engaging protrusion 24 as the engaging means is provided on the front insert 20 side. In the present embodiment, the engagement protrusions 24 are evenly arranged so as not to be separated when the front insert 20 and the intermediate insert 30 are engaged, and on the circumference shifted by 90 degrees from the center of the insert 20. A total of five locations were provided.
An engaging portion 26 having a frustoconical shape is formed coaxially with a neck detail 28 at the tip of the engaging protrusion 24. The engaging portion 26 engages with the engaging portion of the intermediate insert 30 or the rear insert 40, so that the front insert 20 and the intermediate insert 30 are not separated. The size of the engaging portion 26 is appropriately designed in consideration of workability, strength when the front insert 20 and the intermediate insert 30 are engaged, workability, and the like. In this embodiment, the size of the engaging portion 26 protrudes about 4 mm. I am letting. The relationship between the neck detail 28 and the locking portion is designed in consideration of the holding force of the front insert 20 and the intermediate insert 30. Therefore, in the present embodiment, the relationship between the neck detail 28 and the locking hole 34 described below, which is the locking portion, is designed to be light press-fitting.

  The size of the engagement protrusion 24 is appropriately designed in consideration of the thickness, strength, etc. of the intermediate insert 30, but in this embodiment, the thickness of the intermediate insert 30 is only about 2.5 mm, so the engagement portion The engagement portion 26 of the engagement protrusion 24 is hooked on the edge of the engagement hole 34 of the intermediate insert 30 without intentionally providing the engagement portion 26 with which the engagement is performed on the intermediate insert 30. Since the escape portion 44 of the engaging portion 26 is provided in the insert 40, the insert 40 protrudes about 1-2 mm. If the thickness of the intermediate insert 30 is about 5 mm, the locking portion can be provided on the intermediate insert 30.

The front insert 20 is provided with an insertion hole 23 into which the ground contact 80 is inserted, and at least one or more ring-shaped protrusions 29 are also provided in the insertion hole 23. Two convex portions 29 are provided. The size of the insertion hole 23 and the size of the convex portion 29 are the same as those of the insertion hole 22 and the convex portion 29 described above.
Further, the periphery of the insertion hole 23 into which the ground contact 80 on the fitting port 62 side is inserted is projected in a columnar shape in order to increase the edge surface distance as described above.
As described above, the purpose of increasing the edge distance by indenting or projecting may cause a short circuit between the contacts and the contact shell when a voltage of 3000 V is applied to the contacts 50 and 80. In order to prevent a short circuit, the distance between the contacts 50 and 80 is increased. The same applies to the purpose of increasing the edge distance.

Next, the intermediate insert 30 will be described. The intermediate insert 30 is an electrically insulating plastic, which is manufactured by a known technique of injection molding. These materials are appropriately selected in consideration of dimensional stability, workability, cost, etc. Examples include butylene terephthalate (PBT), polyamide (66PA, 46PA), liquid crystal polymer (LCP), polycarbonate (PC), polyphenylene sulfide (PPS), and synthetic materials thereof. The intermediate insert 30 has a substantially cylindrical shape, and is provided with an insertion hole 32 into which the crimp contact 50 is inserted. The size of the insertion hole 32 is about 0.02 to 0.1 mm larger than the crimp pin contact 50.
Since the thickness of the intermediate insert 30 is as thin as 2.5 mm, the intermediate insert 30 is engaged with the engaging portion 26 of the engaging protrusion 24 at a position corresponding to the engaging protrusion 24 of the front insert 20. A locking hole 34 is provided. The engaging portion 26 is caught by the edge of the locking hole 34 so that the ftunt insert 20 and the intermediate insert 30 are not separated. The size of the locking hole 34 is appropriately designed in consideration of the insertion property and the engagement strength of the engaging protrusion 24. In this embodiment, the size of the locking hole 34 is 0.4 to 1 mm from the neck detail 28 of the engaging protrusion 24. It is about bigger.
If the thickness of the intermediate insert 30 is about 5 mm, the locking hole 34 as the locking portion can be formed in a stepped shape, and the engaging portion 26 of the engaging protrusion 24 can be hooked on the stepped portion. .

The intermediate insert 30 is provided with an insertion hole 33 into which the ground contact 80 is inserted. The size of the insertion hole 33 is the same as that of the insertion hole 32 described above.
The periphery of the insertion hole 32 of the intermediate insert 30 on the fitting port side is projected in a columnar shape so as to enter a portion where the front insert 20 is depressed in order to increase the edge distance as shown in FIG. In addition, the periphery of the insertion hole 32 on the opposite side (connection side) is projected so as to enter the insertion hole 42 of the rear insert 40 in order to increase the edge distance as shown in FIG.
Further, the periphery of the insertion hole 33 into which the ground contact 80 on the fitting port 62 side is inserted is projected in a columnar shape to increase the edge distance as described above, and on the opposite side (connection side). A partial periphery of the insertion hole 33 is projected to increase the edge distance as shown in FIG.

  Next, the rear insert 40 will be described. The rear insert 40 is an electrically insulating plastic, and is manufactured by a known technique of injection molding. These materials are appropriately selected in consideration of dimensional stability, workability, cost, etc. Examples include butylene terephthalate (PBT), polyamide (66PA, 46PA), liquid crystal polymer (LCP), polycarbonate (PC), polyphenylene sulfide (PPS), polyetherimide, and synthetic materials thereof. The rear insert 40 is provided with an insertion hole 42 into which the crimp contact 50 is inserted. In the insertion hole 42, a plurality of lances 46 are provided to be hooked on the flange 58 of the crimp pin contact 50. In this embodiment, six lances 46 divided into six equal parts are provided.

Since the thickness of the intermediate insert 30 is as thin as 2.5 mm, the rear insert 40 is configured to escape the engaging portion 26 of the engaging protrusion 24 at a position corresponding to the engaging protrusion 24 of the front insert 20. Is provided. The escape portion 44 is larger than the engagement portion 26 by about 0.2 to 1 mm.
As shown in FIG. 2A, the periphery of the rear insert 40 on the fitting port 62 side is provided with a substantially cross-shaped projection so as to be divided into the crimp pin contact 50 and the ground contact 80, respectively. It has been.
A portion into which the ground contact 80 is inserted is a substantially U-shaped cutout 48.

  In the present embodiment, as described above, the engaging protrusion 24 as the engaging means is provided on the front insert 20 side, but the engaging protrusion 24 as the engaging means is provided on the intermediate insert 30 side. Also good. (Not shown) When the engagement protrusion 24 is provided in the intermediate insert 30, the front insert 20 is provided with a locking hole 34 as a locking means, and the shape of the locking hole 34 is stepped. What is necessary is just to engage so that the engaging part 26 of the engaging protrusion 24 may be hooked on the stepped portion. In this case, the thickness of the front insert 20 is required to be about 1.5 to 2.5 mm.

  Next, the crimp pin contact 50 will be described. The crimp pin contact 50 is made of metal and is manufactured by a known press working. As these materials, pure copper, brass, beryllium copper, phosphor bronze, etc. are considered in consideration of springiness, conductivity, workability, and the like. Can be mentioned. The crimp pin contact 50 is arranged and held on the rear insert 40 by a lance 46 (hook). The crimp pin contact 50 includes a contact portion 52 that mainly contacts a contact of a mating connector, a fixing portion 54 that is arranged and held in each insert, and a connection portion 56 that is connected to a cable or the like. The crimp pin contact 50 is provided with a flange 58 that catches the lance 46 in the insertion hole 42 of the rear insert 40. The connection portion 56 is provided with a hole into which the core wire of the cable 12 is inserted.

  Next, the earth contact 80 will be described. The earth contact 80 is also made of metal, and is manufactured by a known press or cutting process. These materials include brass, beryllium copper, phosphor bronze, etc. in consideration of springiness, conductivity, workability, and the like. Can be mentioned. The ground contact has a substantially cylindrical shape as shown in FIG. 2, and a flange 84 is provided on the opposite side of the contact portion 82 that contacts the counterpart, and the flange 84 has a threaded hole 86 therethrough. Yes. The ground contact 80 is held on the receptacle shell 60 by screwing or pin press-fitting, and is grounded with the receptacle shell 60.

Next, the receptacle shell 60 will be described. The receptacle shell 60 is made of metal and is manufactured by a known technique. Examples of these materials include zinc die cast and aluminum die cast in view of dimensional stability, workability, strength, and the like. .
As shown in FIG. 1A, the receptacle shell 60 is formed with a fitting port 62 into which the mating connector is inserted, and the contact portion 52 of the crimp contact 50 protrudes into the fitting port 62. The fitting port 62 is a through hole, and a mounting portion 64 into which three inserts are inserted is formed on the opposite side of the fitting port 62, and the three inserts are predetermined in the mounting portion 64. A groove for receiving the retainer ring 70 to be held at the position is provided. The size of the groove is appropriately designed so that the retainer ring 70 can be inserted and the three inserts 20, 30, 40 can be held. In this embodiment, the depth is about 0.7 mm.

  The receptacle shell 60 is provided with a flange portion 67 for attachment to a device, and the flange portion 67 is provided with a plurality of attachment holes 68 into which screws are inserted. A screw portion 66 for fitting with a mating connector is provided on the outer periphery of the receptacle shell 60 on the side of the fitting port 62, and the mounting is performed at a predetermined position (a position where there is a ground contact) on the opposite side of the fitting port 62. An insertion hole penetrating the portion 64 is provided. A screw is inserted into the insertion hole and screwed into the screw hole 86 of the ground contact 80 to fix the ground contact 80 and is grounded with the ground contact 80.

  Finally, the retainer ring 70 will be described. The retainer ring 70 is made of metal and is manufactured by a known press working. Examples of these materials include brass, beryllium copper, phosphor bronze and the like in consideration of springiness, conductivity, workability, and the like. it can. The retainer ring 70 has a substantially C-ring, and its role is to fit the three inserts 20, 30, 40 so as not to be detached from the receptacle shell 60 by fitting into the groove portion of the receptacle shell 60. belongs to.

Hereinafter, the assembly method will be described. 4A is a perspective view of the front insert having the extended portion and the intermediate insert before engagement, and FIG. 4B is the front insert having the extended portion and the intermediate insert. FIG.
First, the extending portion 27 is provided at the tip of the engaging protrusion 24.
Next, the extended portion 27 is inserted into the locking hole 34 of the intermediate insert 30 and the extended portion 27 is pulled to engage the engaging protrusion 24 of the front insert 20 with the intermediate insert 30.
Finally, after the engagement, the extending portion 27 is cut.
The diameter of the extended portion 27 is somewhat smaller than the locking hole 34 of the intermediate insert 30 to facilitate insertion. In this embodiment, it is made smaller than the locking hole 34 by about 0.1 to 0.5 mm. Further, the length of the extending portion 27 protrudes from the locking hole 34 of the intermediate insert 30 so that the protruding portion can be held by hand. In this embodiment, the length of the extended portion 27 is about 8 to 12 mm.
In addition, a notch is provided between the distal end of the engaging protrusion 24 and the extended portion 27 so that the extended portion 27 can be easily cut. After the engagement protrusion 24 of the front insert 20 is engaged with the intermediate insert 30, the extension portion 27 can be cut only by further pulling. The depth of the notch was about 0.05 to 0.1 mm.

  As an application example of the present invention, it is used as a single waterproof crimp connector 10 used for a machine tool, a robot or the like, and particularly relates to a connection structure of each insert having a waterproof structure.

(A) It is a perspective view of the single waterproof connector seen from the fitting side. (B) It is a perspective view of the single | mono waterproof connector seen from the connection part side. (A) It is a perspective view of the front insert, intermediate | middle insert, rear insert, and crimp contact seen from the fitting side. (B) It is a perspective view of a front insert, an intermediate insert, a rear insert, and a crimp contact as viewed from the connection portion side. (A) It is sectional drawing of the insertion hole of a crimp pin contact and a ground contact of the state which assembled the front insert, the intermediate | middle insert, and the rear insert. (B) It is sectional drawing of the insertion hole of a crimp pin contact and a ground contact of the state which assembled the front insert, the intermediate | middle insert, and the rear insert, and inserted the crimp pin contact and the ground contact. (A) It is a perspective view of the state before the engagement of the front insert and the intermediate insert which have the extension part. (B) It is a perspective view of the state which the said front insert and the said intermediate insert which had the said extension part engaged. It is the front view and side sectional drawing which show one Example of the structure of the conventional single-piece | unit waterproof soldering pin contact connector. It is side surface sectional drawing of each component of the conventional single-piece | unit waterproof soldering pin contact connector shown in FIG.

10, 90 Single waterproof connector 12 Cable 20, 94 Front insert 22, 23, 94a Insertion hole 24 Engagement protrusion 26 Engagement part 27 Extension part 28 Neck detail 29 Convex part 30, 93 Intermediate insert 32, 33, 93a Insertion hole 34 Locking hole 40, 92 Rear insert 42, 92a Insertion hole 44 Relief part 46 Lance 48 Notch 50 Crimp pin contact 52, 82 Contact part 54 Fixing part 56 Connection part 58, 84 Flange 60, 91 Receptacle shell 62 Fitting port 64 Mounting portion 66, 91c Screw portion 67, 91a Flange portion 68, 91b Mounting hole 70, 96 Retainer ring 80 Ground contact 86 Screw hole 95 Soldering pin contact 951 Soldering ground contact 96a Bending portion

Claims (6)

A receptacle shell, an intermediate insert made of an insulating material having an insertion hole for a plurality of crimp pin contacts, and an insert having the same number of crimp pin contacts as the intermediate insert, and the front of the intermediate insert; A front insert made of an insulating elastic body held on the side, and the same number of crimp pin contact insertion holes as the intermediate inserts, and contact insertions are provided in the insertion holes to be attached to the rear surface of the intermediate inserts A rear insert made of material, a retainer ring for fixing the intermediate insert, the front insert and the rear insert to the receptacle shell, and a rear release structure in which the intermediate insert, the front insert and the rear insert are configured. In simple waterproof crimp connector comprising a crimp pin contacts to be mounted on over preparative,
The front insert or the intermediate insert is provided with at least one engaging protrusion projecting toward the intermediate insert side or the front insert side, and an extended portion is provided at a tip of the engaging protrusion, and the intermediate insert or the front A locking means is provided at a position corresponding to the engaging protrusion of the front insert or the intermediate insert in the insert,
By engaging the projection of the front insert or the intermediate insert with the intermediate insert or the front insert by pulling the extension, and cutting the extension after the engagement,
At least one or more ring-shaped convex portions are provided in an insertion hole of the front insert of the elastic body into which the metal crimp pin contact is inserted, and the crimp pin contact portion has a waterproof structure. Single waterproof crimp connector.   As the locking means, a locking portion that engages with the engaging protrusion is provided on the intermediate insert or the front insert at a position corresponding to the engaging protrusion of the front insert or the intermediate insert. Item 10. A single waterproof crimp connector according to item 1.   As the locking means, a locking hole that engages with the engaging protrusion is provided in the intermediate insert at a position corresponding to the engaging protrusion of the front insert, and the rear insert is provided with the engaging protrusion of the front insert. 2. The single waterproof crimp connector according to claim 1, wherein a relief portion of the engaging protrusion is provided at a corresponding position.   The single waterproof crimp connector according to claim 2 or 3, wherein the engaging protrusions are provided at five locations at a center and 90 degree intervals of the front insert. A receptacle shell, an intermediate insert made of an insulating material having an insertion hole for a plurality of crimp pin contacts, and an insert having the same number of crimp pin contacts as the intermediate insert, and the front of the intermediate insert; A front insert made of an insulating elastic body held on the side, and the same number of crimp pin contact insertion holes as the intermediate inserts, and contact insertions are provided in the insertion holes to be attached to the rear surface of the intermediate inserts A rear insert made of material, a retainer ring for fixing the intermediate insert, the front insert and the rear insert to the receptacle shell, and a rear release structure in which the intermediate insert, the front insert and the rear insert are configured. In simple method of assembling the waterproof crimp connector comprising a crimp pin contacts to be mounted on over preparative,
At least one engaging protrusion projecting toward the intermediate insert side of the front insert is provided, and an extending portion is provided at a tip of the engaging protrusion, and the intermediate insert corresponds to the engaging protrusion of the front insert. A single unit characterized in that a locking means is provided at a position, and by engaging the extension part , the engaging protrusion of the front insert is engaged with the intermediate insert, and the extension part is cut after being engaged. How to assemble a waterproof crimp connector.   A notch is provided between the front end of the engaging protrusion and the extended portion, and the extended portion is cut only by further pulling after engaging the engaging protrusion of the front insert with the intermediate insert. The method for assembling a single waterproof crimp connector according to claim 5.

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