JP2005158396A - Connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connector capable of preventing shifting of the seal ring position when disengaging from the mating connector. <P>SOLUTION: The female connector 10 has a pull-off stop protrusion 120 integrally formed on the outer circumference of a terminal housing part 111 of a connector housing 11. A seal ring 15 is installed at the back side of the pull-off stop protrusion, and develops a waterproof function interposed between a hood part 212 of the male connector 20 and the terminal housing part 111 of the female connector 10 when the male and female connectors 10, 20 are engaged. When the engaged male and female connectors are separated, the seal ring 15 is pulled frontward by the hood part 212 of the male connector 20, but owing to the pull-off stop protrusion 120 located at the front side of the seal ring 15, its position is not shifted. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a connector provided with a seal ring that is mounted on an outer peripheral surface of a terminal accommodating portion and generates a waterproof function with a mating connector.

There has been a connector that includes a seal ring mounted on the outer peripheral surface of a terminal housing portion of a connector housing and generates a waterproof function at a fitting portion with a mating connector (see, for example, Patent Document 1). In the connector according to this prior art, when the mating mating connector is removed, the seal ring may be pulled by the inner peripheral surface of the hood portion, and the seal ring may be displaced from the normal position of the connector housing. When the seal ring is displaced on the connector housing, it is necessary to correct the position of the seal ring when the mating connector is fitted again, which takes time and labor. On the other hand, there is a connector housing with a separate retaining member from the front to prevent the seal ring from being displaced, but the overall size of the connector increases and the number of parts increases, resulting in high costs. Become.
Japanese Patent Laid-Open No. 10-112346 (FIG. 2)

  This invention was completed based on the above situations, Comprising: It aims at providing the connector which can prevent the position shift of a seal ring, when removing a fitting with the other party connector. .

  As means for achieving the above object, the invention of claim 1 comprises a connector housing having a terminal housing portion in which a cavity is formed, and a seal ring mounted on the outer peripheral surface of the terminal housing portion, In the connector in which the outer peripheral portion of the seal ring comes into contact with the inner peripheral surface of the hood portion of the mating connector to generate a waterproof function by fitting the mating connector from the front of the connector housing. A retaining protrusion is integrally formed on the outer peripheral surface of the terminal accommodating portion so as to be positioned in front of the terminal, and an inclined surface having an upward gradient toward the rear is provided at the front end portion thereof. A connector was used.

  The invention according to claim 2 is the connector according to claim 1, wherein a tapered portion whose diameter increases toward the rear is formed in the front portion of the seal ring.

  According to a third aspect of the present invention, a plurality of the retaining protrusions are formed discontinuously on the outer peripheral surface of the terminal accommodating portion, and are positioned behind the retaining protrusions of the connector housing. 3. A die-cutting hole is formed in the portion, wherein a die that forms a space to which the seal ring is attached at the time of molding is partially punched rearward. Connector.

  According to a fourth aspect of the present invention, in the state where the seal ring is mounted on the connector housing, the height of the front end portion thereof is lower than the height of the rear end portion of the retaining protrusion. The connector according to claim 3.

<Invention of Claim 1>
The stopper protrusion is integrally formed on the outer peripheral surface of the terminal accommodating part so as to be located in front of the seal ring, so that the seal ring can be prevented from being displaced when the mating connector is removed. it can. Moreover, since it is not necessary to attach a separate retaining member to the connector housing, the entire connector is not increased in size, and an increase in the number of parts can be prevented. Furthermore, since the front end portion is provided with an inclined surface having an upward gradient toward the rear, when the seal ring is mounted on the outer peripheral surface of the terminal accommodating portion from the front, the retaining protrusion can be easily climbed over. be able to.

<Invention of Claim 2>
A tapered part with a diameter increasing toward the rear is formed in the front part of the seal ring, so that when the mating connector is mated with the mating connector, the hood part of the mating connector collides with the front part. The ring does not turn up and the fitting is performed smoothly.

<Invention of Claim 3>
Several retaining protrusions are discontinuously formed on the outer peripheral surface of the terminal accommodating portion, and a seal ring is attached to each of the portions located behind the retaining protrusions of the connector housing at the time of molding. By forming a mold punching hole for partially punching the mold that forms the space to be formed rearward, it is possible to provide a connector that is easy to mold and easy to manufacture.

<Invention of Claim 4>
With the seal ring attached to the connector housing, the height of the front end of the seal ring is lower than the height of the rear end of the retaining protrusion. The hood portion of the side connector does not collide, and the sealing ring is not turned up, and the fitting is performed smoothly.

  An embodiment of the present invention will be described with reference to FIGS. 1, 4, 5, 6, and 7, the left side is the front of the female connector 10, and the right side is the front of the male connector 20 in FIGS. 6 and 7. The female connector 10 corresponds to the connector of the present invention, and includes a connector housing 11 formed of a synthetic resin material. The connector housing 11 has a terminal accommodating portion 111 and a hood portion 112 formed on the outer peripheral portion thereof. A pair of cavities 113 are formed inside the terminal accommodating portion 111, and a female terminal 13 is accommodated in each of them. The female terminal 13 is formed of a conductive metal, has a fitting portion 131 in the front thereof, and is caulked and connected to the core wire of the electric wire W by a wire barrel (not shown) provided in the rear. The female terminal 13 is caulked to the rubber plug 14 by a seal barrel 132. The rubber plug 14 is formed of a synthetic rubber material and abuts against the inner peripheral surface of the terminal insertion hole 114 located behind the cavity 113 to prevent water from entering the cavity 113 from the rear.

  A lance 115 is formed on the lower surface of each cavity 113 so as to protrude into the cavity 113. The lance 115 engages with the female terminal 13 accommodated in the cavity 113 and functions to prevent the female terminal 13 from coming off. Each front wall that surrounds the cavity 113 is formed with an insertion hole 116 through which the male terminal 23 of the male connector 20 that is the mating connector is inserted. Further, a lock piece 117 is formed on the upper surface of the hood portion 112 to fit the male connector 20 and prevent the male and female connectors 10 and 20 from coming off. A release portion 118 is provided that pushes down and bends the lock piece 117 when removing. Furthermore, a guide portion 119 that extends in the front-rear direction and engages with the guide rib 218 of the male connector 20 is formed on the lower surface of the hood portion 112.

  A retaining projection 120 is formed integrally with the connector housing 11 on the outer peripheral surface of the terminal accommodating portion 111. As shown in FIG. 2, six retaining protrusions 120 are discontinuously provided on the outer peripheral surface of the terminal accommodating portion 111 (only one is denoted by a reference numeral in FIG. 2), which will be described later. In addition, the seal ring 15 is mounted on the outer peripheral surface of the terminal accommodating portion 111 so as to be positioned in front of the seal ring 15. Each of the retaining protrusions 120 protrudes from the outer peripheral surface of the terminal accommodating portion 111, and an inclined surface 121 having an upward gradient toward the rear is formed at the front end portion thereof, and the rear end portion 122 is perpendicular to the front end portion. It stands out (shown in FIG. 5).

  On the rear wall 123 of the hood part 112, a die punching hole 124 penetrating the rear wall 123 in the front-rear direction is formed at a position located behind each of the retaining protrusions 120. Six die cutting holes 124 are formed on the rear wall 123 corresponding to the number of the retaining protrusions 120 (only two in FIG. 3 are labeled). When the connector housing 11 is molded, the mold punching hole 124 is a part of the mold that is sandwiched in the front-rear direction between the retaining protrusion 120 and the rear wall 123 and that forms a space to which the seal ring 15 is attached. It is provided to remove it.

  A seal ring 15 formed of a synthetic rubber material is attached to a portion of the outer peripheral surface of the terminal accommodating portion 111 located between the retaining protrusion 120 and the rear wall 123. As shown in FIG. 5, the seal ring 15 has an annular shape, and as shown in FIG. 5, a taper portion 151 whose diameter increases toward the rear is formed at the front portion, and projects inward and outward at the rear. Three lip portions 152 are arranged. As will be described later, when the male and female connectors 10 and 20 are fitted, the seal ring 15 is fitted with the inner peripheral surface of the hood portion 212 of the male connector 20 and the terminal accommodating portion 111 in the radial direction of the lip portion 152. It is elastically interposed between the parts 125 and generates a sealing function between the male and female connectors 10 and 20. As shown in FIG. 5, the height of the front end 153 of the seal ring 15 is set to be lower than the height of the rear end 122 of the retaining protrusion 120 in the state where the seal ring 15 is mounted.

  As shown in FIG. 6, the connector housing 21 of the male connector 20 is made of a synthetic resin material, and has a terminal accommodating portion 211 and a hood portion 212. A pair of cavities 213 are formed inside the terminal accommodating portion 211, and the male terminal 23 is accommodated in each of them. The male terminal 23 is formed of a conductive metal, has a tab portion 231 in front thereof, and is caulked and connected to the core wire of the electric wire W by a wire barrel (not shown) provided in the rear. The male terminal 23 is caulked to the rubber plug 24 by a seal barrel 232. The rubber plug 24 is made of a synthetic rubber material, and abuts against the inner peripheral surface of the terminal insertion hole 214 located behind the cavity 213 to prevent water from entering the cavity 213 from the rear.

  A lance 215 is formed on the lower surface of each cavity 213 so as to protrude into the cavity 213. The lance 215 engages with the male terminal 23 accommodated in the cavity 213 and functions to prevent the male terminal 23 from coming off. Tab holes 216 through which the tab portions 231 of the male terminals 23 protrude are formed in the respective front walls surrounding the cavity 213. Further, as described above, the lock protrusion 217 that engages with the lock piece 117 of the female connector 10 is formed on the upper surface of the hood portion 212. Furthermore, a guide rib 218 that extends in the front-rear direction and engages with the guide portion 119 of the female connector 10 is formed on the lower surface of the hood portion 212. A bracket fixing portion 219 that is engaged with a bracket (not shown) for fixing the male connector 20 to a vehicle or the like is formed on the lower surface of the connector housing 21 of the male connector 20.

  Furthermore, a separate retainer 25 is attached to the connector housing 21 of the male connector 20 so as to surround the outer peripheral surface of the terminal accommodating portion 211. The retainer 25 is formed of a synthetic resin material. After the male terminal 23 is accommodated in the cavity 213, the retainer 25 is attached to the outer peripheral surface of the terminal accommodating portion 211, thereby preventing the above-described lance 215 from bending downward. It functions to prevent the cavities 23 from coming out of the cavity 213.

  Next, a method for assembling the male and female connectors 10 and 20 will be described with reference to FIGS. First, the terminal accommodating portion 111 of the female connector 10 is inserted through the seal ring 15, and the seal ring 15 is attached to the attachment portion 125. At this time, since the inclined surface 121 having an upward slope is formed at the front end portion of the retaining projection 120 provided in the terminal accommodating portion 111, the seal ring 15 can easily attach the retaining projection 120 to the rear end. You can get over. Next, the female terminal 13 crimped to the electric wire W and the rubber plug 14 is advanced forward from the terminal insertion hole 114 and accommodated in the cavity 113. When entering the cavity 113, the female terminal 13 advances while bending the lance 115 and engages with the lance 115 whose shape has been restored while being housed in the cavity 113, thereby preventing the female terminal 13 from coming off.

  On the other hand, for the male connector 20, as with the female connector 10, the male terminal 23 crimped to the electric wire W and the rubber plug 24 is accommodated in the cavity 213 and engaged with the lance 215, and then the retainer is attached to the connector housing 21. 25 is attached from the front to prevent the male terminal 23 from coming off.

  Next, the male connector 20 is fitted from the front of the female connector 10 while the guide rib 218 is engaged with the guide portion 119. When the fitting of both the connectors 10 and 20 proceeds, the inner peripheral surface of the retainer 25 of the male connector 20 is fitted to the outer peripheral surface of the terminal accommodating portion 111 of the female connector 10 and protrudes from the tab hole 216 of the male connector 20. The tab portion 231 of the male terminal 23 engaged with the fitting portion 131 of the female terminal 13 is electrically coupled to each other. At the same time, the inner peripheral surface of the hood portion 212 of the male connector 20 comes into contact with the outer peripheral portion of the seal ring 15 attached to the connector housing 11 of the female connector 10, so that the seal ring 15 fits both the connectors 10 and 20. A waterproof function is generated at the joint. Thereafter, the locking projection 217 of the male connector 20 is engaged with the locking piece 117 of the female connector 10, so that both the connectors 10 and 20 are prevented from being detached from each other, and the fitting is completed.

  In a state where the male and female connectors 10 and 20 are fitted to each other, the male connector 20 is removed from the female connector 10 while pushing down the release portion 118 of the female connector 10 in order to release the engagement of both the connectors 10 and 20. When pulled apart, the seal ring 15 is pulled from the outer periphery of the male connector 20 to the left in FIG. 7 by the hood portion 212, but the displacement is prevented by the retaining protrusion 120 positioned in front of the seal ring 15. Is done.

  According to this embodiment, since it is not necessary to attach a separate retaining member to the connector housing 11, the entire connector is not increased in size, and an increase in the number of parts can be prevented. In addition, since the tapered portion 151 whose diameter increases toward the rear is formed in the front portion of the seal ring 15, the hood portion 212 of the male connector 20 collides with the front portion when mated with the male connector 20. Even if it does not generate | occur | produce resistance, the seal ring 15 does not turn up but a fitting is performed smoothly. Further, the six retaining protrusions 120 are formed discontinuously on the outer peripheral surface of the terminal accommodating portion 111, so that when the connector housing 11 is formed, the retaining protrusion 120 and the rear wall 123 are front and rear. A mold sandwiched in the direction and forming a space to which the seal ring 15 is attached can be partially punched rearward, so that the connector can be easily punched and easily manufactured.

  In addition, since the inclined surface 121 having an upward slope toward the rear is formed at the front end portion of the retaining protrusion 120, when the seal ring 15 is attached to the outer peripheral surface of the terminal accommodating portion 111 from the front, The removal-preventing protrusion 120 can be easily climbed over, and mounting workability is improved. Further, in the state where the seal ring 15 is mounted on the connector housing 11, the height of the front end portion 153 is the height of the rear end portion 122 of the retaining protrusions 120 formed on the outer peripheral surface of the terminal accommodating portion 111. Since the front end portion 153 of the seal ring 15 is hidden by the retaining protrusion 120 when mated with the male connector 20, the hood portion 212 of the male connector 20 does not collide and the seal ring 15 is turned up. Smooth mating without going up.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, other than the following, depart from the gist. Various modifications can be made without departing from the scope.
(1) The seal ring according to the present invention may be used for a male connector.
(2) An appropriate number of retaining protrusions may be formed on the outer peripheral surface of the terminal accommodating portion.

It is sectional drawing of the female connector by this embodiment. It is a front view which shows the place which removed the female terminal of the female connector shown in FIG. It is a rear view which shows the place which removed the female terminal of the female connector shown in FIG. It is a top view of the female connector shown in FIG. It is the elements on larger scale of the female connector shown in FIG. It is sectional drawing of the female connector and male connector by this embodiment. It is sectional drawing which shows the place which fitted the male and female connector shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Female connector 11, 21 ... Connector housing 15 ... Seal ring 20 ... Male connector 111, 211 ... Terminal accommodating part 112, 212 ... Hood part 113, 213 ... Cavity 120 ... Stop projection 121 ... Inclined surface 122 ... Stop projection Rear end portion 124 ... Mold punching hole 151 ... Tapered portion 153 ... Front end portion of seal ring

Claims (4)

A connector housing having a terminal accommodating portion in which a cavity is formed;
A seal ring mounted on the outer peripheral surface of the terminal accommodating portion;
By fitting the mating connector from the front of the connector housing, the outer peripheral portion of the seal ring comes into contact with the inner peripheral surface of the hood portion of the mating connector to generate a waterproof function.
A retaining protrusion is integrally formed on the outer peripheral surface of the terminal accommodating portion so as to be positioned in front of the seal ring, and an inclined surface having an upward gradient toward the rear is provided at the front end portion thereof. Characteristic connector. The connector according to claim 1, wherein a taper portion whose diameter increases toward the rear is formed in a front portion of the seal ring. Several of the retaining protrusions are discontinuously formed on the outer peripheral surface of the terminal accommodating portion, and the portions located at the rear of the retaining protrusions of the connector housing are formed at the time of molding. The connector according to claim 1, wherein a mold punching hole for partially punching a mold forming a space to which the seal ring is attached is formed rearward. 4. The device according to claim 1, wherein a height of a front end portion of the seal ring is lower than a height of a rear end portion of the retaining protrusion when the seal ring is mounted on the connector housing. The connector described.

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