CN102623832B - Waterproof connector - Google Patents

Abstract

An object of the present invention is to provide an inexpensive waterproof connector that is compact and excellent in assembling properties, accommodation properties, etc., and waterproofness. The present invention is a waterproof connector for cable connection, characterized in that the connector includes a housing having a cylindrical portion for mounting a cable crimped on a joint, a waterproof sleeve, and a cover member, and is provided on the above-mentioned The cylindrical portion on the housing has a sleeve mounting portion for elastically mounting the inner peripheral portion of the front end side of the sleeve on the outer peripheral portion, the inner peripheral portion of the rear end side of the sleeve is elastically mounted on the outer peripheral portion of the cable, and the cover member It is a cylindrical body covering the outer peripheral portion of the sleeve, and the rear end of the cylindrical body has a cable insertion hole and a hooking portion for hooking on the surface of the covering portion of the cable.

Description

Waterproof Connector

technical field

The present invention relates to a waterproof type connector for watertightly connecting cables.

Background technique

For example, waterproof connectors are used where cables are used to electrically connect solar panels, etc.

Such a conventional waterproof connector is known as the following type as shown in FIG. seal 102 .

In addition, as shown in FIG. 5( b ), there is known a type in which a waterproof pipe 104 is installed over the casing 101 a and the cable 1 , and the outer peripheral side is fastened with cover members 105 and 106 split in half (see Patent Document 1). .

However, since the connector using such a cap nut-shaped cover member and a half-split cover member has to increase the overall size of the cover portion, when a plurality of solar panels are installed, etc., the surrounding of the cable becomes more complicated. Difficult, there is a problem that the storage space increases when the cable is accommodated on a stand such as the back of the solar panel.

Therefore, the applicant previously applied for a waterproof connector that can be assembled only by inserting a cable with a connector crimped at the front end from the connector side in Japanese Patent Application No. 2009-286332. invention of invention.

prior art literature

Patent Document 1: Japanese Patent Laid-Open No. 2008-130462

Contents of the invention

An object of the present invention is to provide an inexpensive waterproof connector that is compact and excellent in assembling property, accommodating property, etc., and waterproof property.

The waterproof connector of the present invention is a waterproof connector for cable connection, and is characterized in that the connector includes a housing having a cylindrical portion for attaching a cable to which a joint is crimped, a waterproof sleeve, and a cover. Components, the cylindrical portion provided on the above-mentioned housing has a sleeve mounting portion on the outer peripheral portion for elastically mounting the inner peripheral portion of the front end side of the sleeve, and the inner peripheral portion of the rear end side of the sleeve is elastically mounted on the outer circumference of the cable. On the part, the cover member is a cylindrical body covering the outer peripheral part of the sleeve, and the rear end of the cylindrical body has an insertion hole for the cable and a hooking part for hooking on the surface of the covering part of the cable.

Here, the casing and the cover member may have a fixing portion on one side and a fixed portion on the other side.

In this way, the cover member can be reliably attached to the housing, and the sleeve can be pressed and protected from the outer peripheral side by the cover member.

In the present invention, the sleeve is made of an elastic material such as rubber, has a tubular form, and has an inner diameter smaller than the outer diameter of the cable in a free state.

In addition, it is preferable that the inner diameter of the cover member is the same as or slightly smaller than the outer diameter of the sleeve member, so that the sleeve member can be inserted.

Also, when the cable is inserted inside the sleeve member, the outer diameter slightly increases due to the elasticity of the sleeve member, but it is preferable that the outside of the sleeve member is in contact with the inner peripheral surface of the cover member at this time.

Assembled by inserting the cable from the rear end side of the cover portion made of a cylindrical body, the cable insertion hole on the rear end side of the cylindrical body has an inner diameter ratio The outer diameter is slightly larger.

However, if the inner diameter of the insertion hole is set in this way, the temperature of the outer peripheral portion becomes lower and the outer diameter of the cable decreases, which may cause the position of the cover member and the cable to shift from each other.

Therefore, in the present invention, the hook portion cut into the surface of the covering portion of the cable is formed in the cover member.

The effects of the present invention are as follows.

The waterproof connector of the present invention makes the cover member that protects the outer peripheral portion of the waterproof sleeve into a cylindrical body, which is smaller than the cover member of the conventional cap nut shape and the half-split type, such as When used for installation of a solar panel, the cables can be easily surrounded, and the space for accommodating the cable connector can be reduced.

In addition, since the cover member has a hooking portion hooked to the covering portion of the cable, even if the temperature drops and the outer diameter of the cables shrinks, they can be reliably hooked to each other.

If the cover member and the housing are fixed to each other by providing a fixing portion on one side and a fixed portion on the other side, the cover member is prevented from falling off from the connector housing, and the protection reliability of the sleeve and the like is improved.

Description of drawings

FIG. 1 shows a structural example of a waterproof connector according to the present invention.

Fig. 2 shows an enlarged view of the rear end of the connector.

Fig. 3 shows an external view of the insertion hole side of the cover member.

Fig. 4 shows a connection example of a plug connector and a receptacle connector.

Figure 5 shows an existing connector.

In the picture:

1-cable, 1b-covering part, 2-connector, 10-waterproof connector, 11-housing, 11a-sleeve mounting part, 11b-fixing convex part, 12-sleeve, 13-cover part, 13a- Fixing hole, 13b-notch part, 13e-hook part.

Detailed ways

The waterproof connector structure of the present invention can be applied to both a receptacle connector and a plug connector, and FIG. 1 shows an example of a receptacle type receptacle connector.

The waterproof connector 10 of the present invention has a resin case 11 formed by injection molding or the like, a rubber sleeve 12 and a resin cover member 13 .

The housing 11 has a cylindrical sleeve mounting portion 11 a for elastically mounting the sleeve 12 at a rear end portion opposite to a fitting portion of a mating connector (plug connector).

As shown in Figure 1 (a), (b), the inner surface of the sleeve 12 is elastically installed (sealed) on the outer peripheral surface of the sleeve installation part 11a, and the inner side of the sleeve 12 is embedded in the sleeve. Section 11a.

The sleeve 12 has elasticity, and the inner diameter of the sleeve 12 is set to be slightly smaller than the outer diameter of the sleeve installation part 11a. Keep it watertight.

A stepped portion 11c having a larger outer diameter is provided on the mating contact side of the sleeve mounting portion 11a, and the front end surface 12a of the sleeve 12 abuts on the stepped surface.

The length of the sleeve mounting portion 11 a is set to be shorter than the entire length of the sleeve 12 , for example, the length of the sleeve mounting portion 11 a is about 1/2 to 1/3 of the length of the sleeve 12 .

Therefore, as shown in FIG. 1( b ), the rear end side of the sleeve 12 is in a state protruding toward the front end from the sleeve mounting portion 11 a.

In this state, as shown in FIG.1(b), (c), the cylindrical cover member 13 is attached so that the outer peripheral part of the sleeve 12 may be covered from the outside.

The cover member 13 is made of resin, and its inner diameter is set to be equal to the outer diameter of the sleeve 12 located on the outer periphery of the sleeve attachment portion 11a when the sleeve 12 is attached to the sleeve attachment portion 11a of the housing 11. The outer diameter of the sleeve 12 is the same as or slightly smaller than that of the portion protruding rearward from the sleeve mounting portion 11a, and it is preferable that the inner peripheral surface of the cover member 13 presses the outer peripheral surface of the sleeve 12 .

In addition, when the cable is inserted into the rear end portion of the sleeve 12, the outer diameter of the sleeve 12 becomes slightly larger, thereby further being pressed by the inner peripheral surface of the pressing cover member.

The cover member 13 has an inwardly folded portion 13c and an insertion hole 13d for the cable 1 on the rear end side, and has a fixing hole 13a on the front end side.

If the cover member 13 is installed on the outer peripheral portion of the sleeve 12, the fixing hole 13a of the cover member 13 is fixed on the fixing convex portion 11b provided on the outer peripheral surface of the housing 11, and the folded portion 13c is located on the rear end surface of the sleeve 12. 12b.

In this embodiment, since the housing 11 is provided with the fixing claw 11d fixed to the mating connector, the notch 13b is formed in the cover member 13 so as not to interfere with the bottom of the fixing claw 11d.

The cable 1 is inserted and assembled through the insertion hole 13 d on the rear end side of the cover member 13 with the metal connector 2 connected to the front end side as will be described later.

FIG. 2 shows an enlarged view of this state, and FIG. 3( a ) shows an external view of the rear end of the cover member 13 .

Let the outer diameter of the cable 1 be d0, and consider the ease of assembly when the cable is inserted into the insertion hole 13d of the resin cover member 13, and let the inner diameter of the insertion hole be d, the inner diameter d is preferably slightly larger than the cable outer diameter d0. .

However, if the covering portion 1b of the cable 1 shrinks due to a drop in temperature or the like, looseness may occur between the insertion hole 13d and the covering portion 1b of the cable 1, which may affect watertightness.

Therefore, a hook portion 13e protruding inward of the insertion hole 13d and hooked so as to cut into the surface of the covering portion 1b of the cable 1 is provided.

Therefore, the inner dimension d1 of the portion having the hook portion 13e is smaller than the outer diameter d0 of the cable 1 .

In this way, as shown in the cross-sectional view of FIG. 2( b ), it is hooked so as to form a notch 1 c on the surface of the covering portion 1 b made of resin or rubber.

The actual hooking depth is about 0.05 to 0.1 mm, which is sufficient, but it is enlarged and shown in FIG. 1( d ) and FIG. 2( b ).

In this embodiment, in order to provide an example in which the inclined surface 13f is inclined inwardly along the insertion direction of the cable 1 so as to facilitate the insertion of the cable 1, the number of the hook portions 13e is three in FIG. 3(b). There are four places in FIG. 3(c), and there is no limitation on the number. In addition, as shown in FIG. The inner diameter of the folded part 13c is slightly smaller than the hook part 13g of the outer diameter of the cable.

A metal joint 2 having a notch 2a and a stabilizer 2b is crimped and connected to the center line at the front end of the cable 1 by a crimping portion 1a.

Here, the notch 2a and the stabilizer 2b are cut and raised from the metal joint body, and are set as circumscribed circles of each protruding end so that the joint 2 can pass through the sleeve mounting portion 11a without being hindered when assembled. The size is smaller than the inner diameter of the sleeve mounting portion 11a.

As shown in Figure 1 (c), (d), if the connector 2 is inserted from the cable insertion hole 13d of the cover member 13, the notch fixing part and the stabilizer insertion groove (both omitted) provided on the housing 11 side are fixed and inserted. illustration), enabling simple assembly of the connector.

At this time, as far as the inner peripheral surface of the sleeve 12 is concerned, the inner diameter d2 is smaller than the outer diameter d0 of the cable. Since the side abuts against the inner peripheral surface of the cover member 13, the outer peripheral surface of the cable 1 and the inner peripheral surface of the sleeve 12 are more strongly sealed by the reaction force thereof.

As shown in FIG. 4 , the plug connector 20 corresponding to the socket connector 10 also has the same structure. fixed and electrically connected to each other.

In this embodiment, it is an example in which the fitting portion 11j of the receptacle connector 10 is fitted and installed inside the housing 21 of the plug connector 20, and is provided on the outer peripheral portion of the fitting portion 11j on the side of the receptacle connector 10. The O-ring 11i is in sealing connection with the inner peripheral surface of the housing 21 of the plug connector 20 .

In the waterproof connector of the present invention, the sleeve and the cover member are installed on the housing of the connector in advance, and only by inserting the cable with the joint at the front end, the outer diameter of the covering part of the cable is compared to the sleeve. When the inner side of 12 is inserted in such a manner that the diameter is enlarged, a reaction force is generated by pressing the cover member, so that a simple structure and sufficient sealing pressure for ensuring waterproofness can be obtained.

Claims (2)

1. A waterproof connector for cable connection, characterized in that, The connector includes a housing having a barrel portion for mounting a cable crimped to a connector, a waterproof sleeve, and a cover member, The cylindrical part provided on the above-mentioned housing has a sleeve mounting part on the outer peripheral part for elastically mounting the inner peripheral part of the front end side of the sleeve, and the inner peripheral part of the rear end side of the sleeve is elastically mounted on the outer peripheral part of the cable. , The cover member is a cylindrical body integrally covering the entire circumference of the outer periphery of the sleeve, and the rear end of the cylindrical body has an insertion hole for inserting the cable for assembly and a hooking portion for hooking on the surface of the covering portion of the cable. ;In the state where the sleeve is installed on the sleeve installation part of the housing, the inner diameter of the cover member is in relation to the outer diameter of the sleeve located on the outer periphery of the sleeve installation part and the sleeve of the part protruding from the sleeve installation part to the rear. The outer diameter of the barrel is the same or slightly smaller; the cable with the connector installed is inserted at the front end, and the cover member is pressed to generate a reaction force compared to the inserted state in which the outer diameter of the cable covering portion expands the inner diameter of the sleeve; The hooking portion protrudes inwardly of the insertion hole, and is hooked so as to cut into the surface of the covering portion of the cable. 2. The waterproof connector according to claim 1, characterized in that, The casing and the cover member have a fixing portion on one side and a fixed portion on the other side for mutual fixing.