JP2011198499A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector in which a high sealing performance can be obtained even when a tension is applied on an electric wire.SOLUTION: The connector 1 is provided with a connector housing 10 having a component housing chamber 11 opened to the outside, a connecting terminal 13 arranged in the component housing chamber 11, and a sealing plug 20 which is pressed into the opening side of the component housing chamber 11 and has a wire insertion hole 26 to communicate between the component housing chamber 11 and the outside, and the electric wire W connected to the connecting terminal 13 is led to the outside through the wire insertion hole 26. The sealing plug 20 has a plug body 21 made of rubber which is contacted closely to the inner circumference of the component housing chamber 11 and has a rubber insertion hole part 26a to constitute a part of the wire insertion hole 26 and a wire holding part 25 which is integrally formed of a higher rigidity material than the plug body 21 inside the plug body 21 and has a resin insertion hole part 26b to constitute a part of the wire insertion hole 26.

Description

  The present invention relates to a connector that is attached to a mounting hole of a case or the like while maintaining sealing properties and electrically relays the inside and outside of the case or the like.

  As this type of conventional connector, as shown in Patent Document 1 and Patent Document 2, various connectors have been proposed. One prior example of such a connector is shown in FIG.

  In FIG. 6, the connector 50 is attached to the attachment hole 52 of the case 51 of the automatic transmission. The connector 50 includes a connector housing 60 having component housing chambers 61 opened on both sides, an inner housing 62 disposed in the component housing chamber 61, a plurality of connection terminals 63 supported by the inner housing 62, and the component housing chamber 61. A resin filling portion 64 made of epoxy or the like that is filled inside and fixes the inner housing 62 and the like, and a rubber plug 65 made of rubber press-fitted into one opening side of the component housing chamber 61 are provided.

  A lower end portion 60 a of the connector housing 60 is inserted into the attachment hole 52 of the case 51. An O-ring 70 is attached to the outer periphery of the lower end portion 60 a of the connector housing 60. A space between the outer peripheral surface of the connector housing 60 and the inner peripheral surface of the mounting hole 52 of the case 51 is sealed with an O-ring 70.

  The rubber plug 65 is provided with a plurality of wire insertion holes 65 a that communicate between the outside and the component housing chamber 61. The plurality of electric wires W respectively connected to the connection terminals 63 are led to the outside, that is, the internal space of the case 51 through the electric wire insertion holes 65a.

  As shown in detail in FIG. 7A, the gap between the outer peripheral surface of the rubber plug 65 and the inner peripheral surface 61 a on the opening side of the component housing chamber 61 of the connector housing 60 is sealed by the rubber adhesion of the rubber plug 65. Yes. The outer peripheral surface of each electric wire W and the inner peripheral surface of the electric wire insertion hole 65a of the rubber plug 65 are similarly sealed by the rubber adhesion of the rubber plug 65.

  Accordingly, there is a portion in oil in the case 51 of the automatic transmission, and if the oil tries to enter through the gap on the opening side of the component housing chamber 61 of the connector housing 60 or the gap of the wire insertion hole 65a of the rubber plug 65, the rubber plug The sealability due to 65 prevents oil from entering.

JP-A-2-278673 JP-A-8-22862

  However, as shown in FIG. 7B, when tension T acts on the electric wire W drawn in a direction different from the electric wire drawing direction of the connector 50 (direction of the electric wire insertion hole 65a), the connector 50 is located in the electric wire insertion hole 65a. The part of the electric wire W interferes with the rubber plug 65, and the electric wire W presses the rubber plug 65 in the tension direction. Then, the rubber plug 65 has a place where a compressive force acts and a place where a tensile force acts. The adhesiveness of the rubber plug 65 can be improved at the location where the compressive force is applied (left side of the electric wire W in FIG. 7B), but the rubber is applied at the location where the tensile force is applied (right side of the electric wire W in FIG. 7B). Since it acts in the direction of weakening the adhesion of the stopper 65, there is a problem that the sealing performance of the rubber stopper 65 is lowered.

  In particular, as shown in FIG. 6, the connector 50 attached to the case 51 of the automatic transmission contains an oil passage forming component 72 and the like inside the automatic transmission. The electric wire W led to is arranged so as to bend in a right angle direction immediately. Therefore, the tension T is easily applied to the electric wire W in a direction different from the direction of the electric wire insertion hole 65a, and a countermeasure for this is desired.

  Therefore, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a connector that can obtain high sealing performance even when tension is applied to an electric wire.

  According to the first aspect of the present invention, there is provided a connector housing having a component housing chamber opened to the outside, a connection terminal disposed in the component housing chamber, and press-fitted into the opening side of the component housing chamber. A sealing plug having a wire insertion hole communicating with each other, wherein the electric wire connected to the connection terminal is led to the outside through the wire insertion hole, and the sealing plug includes the component A rubber plug main body portion that is in close contact with the inner peripheral surface of the storage chamber and that is provided with a rubber insertion hole portion that constitutes a part of the wire insertion hole, and the plug main body portion from the plug main body portion. And an electric wire holding portion provided with a high-rigidity insertion hole portion that is provided integrally with a highly rigid material and forms a part of the electric wire insertion hole.

  A second aspect of the invention is the connector according to the first aspect, wherein the electric wire holding portion is a synthetic resin material.

  The invention according to claim 3 is the connector according to claim 1 or claim 2, wherein the opening side of the component housing chamber is provided in a stepped shape from a small diameter to a large diameter toward the outside, and the plug body portion Has a small-diameter portion and a large-diameter portion corresponding to the step shape on the opening side of the component housing chamber, and a recess is provided on the wire drawing side of the large-diameter portion of the plug body portion, and the wire holding portion is provided in the recess Is provided.

  A fourth aspect of the invention is the connector according to any one of the first to third aspects, wherein the end portion of the high-rigidity insertion hole portion on the side of drawing out an electric wire is a rounded surface.

  According to the first aspect of the present invention, the space between the outer peripheral surface of the sealing plug and the inner peripheral surface of the component housing chamber of the connector housing is sealed by the adhesion by the rubber plug main body. In addition, the gap between the outer peripheral surface of each electric wire and the inner peripheral surface of the electric wire insertion hole of the sealing plug is sealed by the adhesiveness of the rubber plug main body within the range of the rubber insertion hole. When the pressing force due to the tension of the electric wire acts on the sealing plug, the pressing force is received by both the highly rigid electric wire holding portion and the rubber plug main body, so that the elastic deformation amount of the rubber plug main body is small. It is suppressed to a small size, and the sealing performance of the plug body is not lowered. That is, since the crushing rate of the plug body is optimized, high sealing performance can be obtained even when tension is applied to the electric wire.

  According to invention of Claim 2, a sealing stopper can be produced cheaply.

  According to the invention of claim 3, when the sealing plug is inserted into the opening side of the component housing chamber of the connector housing, the step surface between the small diameter portion and the large diameter portion of the sealing plug is a step on the opening side of the component housing chamber. Since it suffices to insert it until it hits the surface, the sealing plug can be reliably and easily inserted to an appropriate position. In addition, when the pressing force due to the tension of the wire acts on the sealing plug, this pressing force is received by the large-diameter portion having the highly rigid wire holding portion, so that the small-diameter portion of the sealing plug is hardly affected by the tension of the wire. Therefore, the sealing performance between the outer periphery of the electric wire and the inner periphery of the rubber insertion hole can be ensured.

  According to invention of Claim 4, since an electric wire contacts the rounded surface of a highly rigid electric wire holding part, damage to an electric wire can be prevented as much as possible.

1 is a partially cutaway front view of a connector, showing an embodiment of the present invention. 1 shows an embodiment of the present invention, (a) is a perspective view of a sealing plug, (b) is a bottom view of the sealing plug. It is a front view which shows one Embodiment of this invention and demonstrates the assembly | attachment process of a connector. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention, wherein (a) is a cross-sectional view of a main part of a connector showing a state where no tension is applied to the electric wire, and (b) is a cross-sectional view of a main part of the connector showing a state where the tension is applied to the electric wire. It is. The modification of embodiment is shown, (a) is principal part sectional drawing of the connector which shows the state in which the tension | tensile_strength does not act on an electric wire, (b) is principal part sectional drawing of the connector which shows the state in which the tension | tensile_strength acted on the electric wire. is there. It is a partially broken front view of a connector which shows a prior example. A prior example is shown, (a) is principal part sectional drawing of the connector which shows the state in which the tension | tensile_strength does not act on an electric wire, (b) is principal part sectional drawing of the connector which shows the state in which the tension | tensile_strength acted on the electric wire.

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

  1 to 4 show an embodiment of the present invention, FIG. 1 is a partially broken front view of a connector 1, FIG. 2 (a) is a perspective view of a sealing plug 20, and FIG. 2 (b) is a sealing plug. 3 is a bottom view of FIG. 3, FIG. 3 is a front view for explaining the assembly process of the connector 1, FIG. 4A is a cross-sectional view of the main part of the connector 1 showing a state in which no tension is applied to the electric wire W, and FIG. FIG. 2 is a cross-sectional view of a main part of the connector 1 showing a state in which a tension is applied to the electric wire W.

  As shown in FIG. 1, the connector 1 is attached to the attachment hole 2a of the case 2 of the automatic transmission, and performs electrical relay between the inside and the outside of the automatic transmission.

  The connector 1 includes a connector housing 10 having a component storage chamber 11, an inner housing 12 disposed at a predetermined position of the component storage chamber 11, a plurality of connection terminals 13 supported by the inner housing 12, and a component storage chamber 11. And a resin filling portion 14 such as epoxy that fixes the inner housing 12 and the like, and a sealing plug 20 that is press-fitted into the opening side below the component housing chamber 11.

  A lower end portion 10 a of the connector housing 10 is inserted into the mounting hole 2 a of the case 2. An O-ring 30 is attached to the outer periphery of the lower end portion 10 a of the connector housing 10. A space between the outer peripheral surface of the connector housing 10 and the inner peripheral surface of the mounting hole 2 a of the case 2 is sealed by an O-ring 30. The upper part of the parts housing chamber 11 is opened in the external space of the case 2 of the automatic transmission, and the lower part of the parts housing room 11 is opened in the internal space of the case 2 of the automatic transmission. The opening side above the component housing chamber 11 is a straight inner peripheral surface. A mating terminal of a mating connector (not shown) is inserted from the opening side above the component housing chamber 11. The mating terminal of the mating connector (not shown) inserted is connected to the connection terminal 13 in the component housing chamber 11. The opening side below the component housing chamber 11 is formed in a step shape from the small diameter portion 11a and the large diameter portion 11b.

  As shown in detail in FIGS. 2 (a), 2 (b) and 4 (a), the sealing plug 20 is integrally formed with a plug main body 21 made of rubber (for example, acrylic rubber) and the plug main body 21. And it is comprised from the electric wire holding | maintenance part 25 formed from the synthetic resin material of the member whose rigidity is higher than the rubber material of the plug main-body part 21. FIG.

  The plug body 21 is composed of a small diameter portion 22 and a large diameter portion 23 corresponding to the step shape on the opening side of the component housing chamber 11. On the outer peripheral surfaces of the small-diameter portion 22 and the large-diameter portion 23, press-fitting annular protrusions are projected. The large diameter portion 23 is provided with a flat cylindrical recess 23a. A flat columnar electric wire holding portion 25 is embedded in the concave portion 23a.

  In this embodiment, the electric wire holding portion 25 is made of polyamide (PA) or polyamide 6T (PA-6T).

  A plurality of wire insertion holes 26 are opened in the sealing plug 20 at intervals on substantially the same circumference. Each electric wire insertion hole 26 communicates the component housing chamber 11 with the internal space of the case 2. Each electric wire insertion hole 26 includes a rubber insertion hole portion 26a formed in the rubber plug main body portion 21 and a resin insertion hole portion 26b which is a high-rigidity insertion hole portion formed in the electric wire holding portion 25 made of synthetic resin. It is composed of

  One end side of each of the plurality of electric wires W is connected to each connection terminal 13 and led to the outside, that is, the internal space of the case 2 through each electric wire insertion hole 26.

  Next, the outline of the assembly procedure of the connector 1 will be described. As shown in FIG. 3, first, a plurality of connection terminals 13 are mounted on the inner housing 12, and one end side of the electric wire W is connected to the plurality of connection terminals 13. Further, the connection terminal 13 with the electric wire W is attached to the inner housing 12.

  Next, the inner housing 12 with the connection terminals 13 and the electric wires W is inserted from the opening side above the component housing chamber 11 of the connector housing 10 (external space of the case 2 at the time of installation), and the inner housing 12 is inserted into the component housing chamber 11. In a predetermined position.

  Next, while passing one end side of each electric wire W through the plurality of electric wire insertion holes 26 of the sealing plug 20, the sealing plug 20 is opened below the component housing chamber 11 of the connector housing 10 (the case 2 at the time of installation). Press fit from inside space. The sealing plug 20 is press-fitted with the small diameter portion 22 as an insertion tip.

  Finally, epoxy resin is injected from the opening side above the component housing chamber 11 of the connector housing 10 (external space of the case 2 at the time of installation) to form the resin filling portion 14. Thereby, the connection location between each electric wire W and the connection terminal 13 is fixed, and the inner housing 12 is fixed at a predetermined position in the component housing chamber 11. Then, the connector 1 is attached to the case 2 by press-fitting the lower end portion 1 a of the connector 1 assembled in this way into the attachment hole 2 a of the case 2.

  In the above-described configuration, as shown in detail in FIG. 4A, the rubber seal between the outer peripheral surface of the sealing plug 20 and the inner peripheral surface on the opening side of the component housing chamber 11 of the connector housing 10 is provided by the plug main body 21. The whole area is sealed by sex. Further, the outer peripheral surface of each electric wire W and the inner peripheral surface of the electric wire insertion hole 26 of the sealing plug 20 are sealed by rubber adhesion by the plug main body portion 21 in the range of the rubber insertion hole portion 26a. As shown in FIG. 4B, when the electric wire W is pulled in a direction different from the direction of the electric wire insertion hole 26, the pressing force due to the tension T of the electric wire W acts on the sealing plug 20. Then, since this pressing force is received by the highly rigid synthetic resin wire holding part 25, the amount of elastic deformation of the rubber plug body 21 is suppressed to be small, and the sealing performance of the plug body 21 is almost lowered. Absent. That is, since the crushing rate of the plug main body 21 is optimized, high sealing performance can be obtained even when the tension T acts on the electric wire W.

  Accordingly, there is a portion in oil in the case 2 of the automatic transmission, and if the oil tries to enter through the gap on the opening side of the component housing chamber 11 of the connector housing 10 or the gap of the wire insertion hole 26 of the sealing plug 20, Infiltration of oil is prevented by the sealing performance of the stopper plug 20.

  Moreover, since the electric wire holding part 25 is a synthetic resin material, the sealing plug 20 can be produced at low cost.

  The opening side below the component storage chamber 11 is provided in a stepped shape from the small diameter portion 11a to the large diameter portion 11b toward the outside, and the plug main body portion 21 corresponds to the step shape on the opening side of the component storage chamber 11. The small-diameter portion 22 and the large-diameter portion 23 are configured. Therefore, when the sealing plug 20 is inserted into the opening side of the component housing chamber 11 of the connector housing 10, the step surface of the small diameter portion 22 and the large diameter portion 23 of the sealing plug 20 is a step on the opening side of the component housing chamber 11. Since it suffices to insert it until it hits the surface, the sealing plug 20 can be reliably and easily inserted to an appropriate position.

  A concave portion 23a is provided on the wire drawing side of the large diameter portion 23 of the plug main body portion 21, and an electric wire holding portion 25 is embedded in the concave portion 23a. Therefore, when the pressing force due to the tension T of the electric wire W acts on the sealing plug 20, this pressing force is received by the large diameter portion 23 having the highly rigid electric wire holding portion 25, and therefore the small diameter portion 22 of the sealing plug 20 The seal property between the outer periphery of the electric wire W and the inner periphery of the rubber insertion hole 26a can be reliably ensured without being affected by the tension T of W.

(Modification)
5 (a) and 5 (b) show a modification of the embodiment, FIG. 5 (a) is a cross-sectional view of the main part of the connector showing a state where no tension is applied to the electric wire W, and FIG. It is principal part sectional drawing of the connector which shows the state in which the tension | tensile_strength acted on the electric wire W. FIG.

  The connector of the modified example is only partially different from the connector 1 of the above embodiment in the configuration of the sealing plug 20A. That is, as shown in FIG. 5A, the sealing plug 20 </ b> A according to the modified example is formed on the rounded surface 27 at the end of the resin insertion hole 26 b on the electric wire drawing side.

  Since other configurations are the same as those of the above-described embodiment, description thereof is omitted. The same components in the drawings are given the same reference numerals for clarification.

  Also in this modified example, the same operation and effect as in the above embodiment can be obtained.

  In this modification, the end of the resin insertion hole 26b on the side of drawing out the electric wire is the rounded surface 27. Therefore, when the electric wire W is pulled in a direction different from the direction of the electric wire insertion hole 26, FIG. Since the electric wire W contacts the rounded surface 27 of the electric wire holding | maintenance part 25 as shown in FIG. 3, damage to the electric wire W can be prevented as much as possible.

(Other)
In the embodiment and the modification, the electric wire holding portion 25 is made of a synthetic resin, but may be made of a material other than the synthetic resin as long as the material is higher in rigidity than the rubber material of the plug main body portion 21.

  In the embodiment and the modification, the connector 1 is attached to the case 2 of the automatic transmission. However, the present invention is not limited to this.

DESCRIPTION OF SYMBOLS 1 Connector 10 Connector housing 11 Component storage chamber 13 Connection terminal 20 Sealing plug 21 Plug main body part 22 Small diameter part 23 Large diameter part 25 Electric wire holding part 26 Electric wire insertion hole 26a Rubber insertion hole part 26b Resin insertion hole part (High-rigidity insertion hole) Part)
27 Earl side

Claims (4)

A connector housing having a component housing chamber opened to the outside, a connection terminal disposed in the component housing chamber, and a wire insertion hole that is press-fitted into the opening side of the component housing chamber and communicates between the component housing chamber and the outside. A connector in which an electric wire connected to the connection terminal is led to the outside through the electric wire insertion hole,
The sealing plug is in close contact with the inner peripheral surface of the component housing chamber, and is provided with a rubber plug main body portion provided with a rubber insertion hole portion constituting a part of the wire insertion hole, and the plug main body portion. And a wire holding portion provided with a high-rigidity insertion hole portion that is integrally formed from a material having higher rigidity than the plug main body portion and forms a part of the wire insertion hole. The connector according to claim 1,
The electric wire holding part is a synthetic resin material. The connector according to claim 1 or 2, wherein
The opening side of the component storage chamber is provided in a step shape that becomes a large diameter from a small diameter toward the outside,
While having a small-diameter portion and a large-diameter portion corresponding to the step shape on the opening side of the plug body portion and the component storage chamber,
A connector, wherein a concave portion is provided on a wire drawing side of a large diameter portion of the plug main body portion, and the electric wire holding portion is provided in the concave portion. The connector according to any one of claims 1 to 3,
An end of the high-rigidity insertion hole on the side of drawing out an electric wire is a rounded surface.

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