JPH056729U - Waterproof connector plug - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a waterproof connector plug that is easy to mount, has excellent waterproof properties, and is inexpensive. [Structure] A plug 6 to be inserted into a connection terminal insertion hole 4 having a circular inner cross section of a waterproof connector used in an automobile engine room
And is composed of a spherical elastic body. [Effect] Since it is made of a spherical elastic body, it is mounted in the connection terminal insertion hole 4 having a circular inner cross-section in any direction with good adhesion and excellent in mounting property and waterproof property. In addition, since it has a spherical shape, it is small and lightweight, has high productivity, and is therefore inexpensive.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a plug to be attached to a connection terminal insertion hole of a waterproof connector used in an automobile engine room or the like.

[0002]

[Prior Art]

 The connectors used in automobiles are used in harsh environments with large temperature differences and strong vibrations, and especially in the engine room, they are corroded by rainwater and chlorides that are sprayed to prevent freezing. In order to maintain a long service life, a waterproof connector is used in the engine room. By the way, as shown in FIG. 2, the waterproof connector is composed of a female housing 1 and a male housing 2, both of which are fitted to form a housing room. The connection terminals 5 and 15 attached to the tips are used by connecting them to each other. The waterproof connector is waterproofed by the seal rubber 7 provided in the female housing 1 between the female and male housings. The connection terminal insertion hole 4 leading to the connection terminal is formed by the rubber plugs 8 attached to the bases of the connection terminals 5 and 15, respectively, and the insertion hole 4 into which the connection terminals 5 and 15 are not inserted has the outer periphery as shown in FIG. A rubber plug 16 (see FIG. A) provided with a plurality of lips 9 having a circular cross section is pushed into the insertion hole 4, and the outer periphery of the lip 9 is closely attached to the inner surface of the insertion hole 4 having a circular inner cross section. To install (See Figure B).

[0003]

[Problems to be solved by the device]

 However, if the above-mentioned lip-type plug is not carefully inserted into the connection terminal insertion hole, the lip-type plug 16 is inserted in the depth direction of the insertion hole 4 as shown in the longitudinal sectional view of the mounting state in FIG. It was sometimes mounted in an inclined state and the waterproofness was impaired. For this reason, the number of lips is increased to prevent the inclination of the stopper, but there is a problem that the weight is increased and the material cost is high and the cost is high.

[0004]

[Means for solving the problem]

 The present invention has been made as a result of earnest research in view of such circumstances, and an object thereof is to provide a plug for a waterproof connector which is excellent in wearability and waterproofness. That is, the present invention is a plug to be mounted in a connection terminal insertion hole of a waterproof connector having a circular inner cross section, and the plug is made of a spherical elastic body. The stopper of the present invention has a spherical shape, but since an elastic body is used as the material, it does not have to be a true sphere, and even if there is some distortion, its outer diameter is sufficiently larger than the inner diameter of the insertion hole. There is no problem if you save it. As the material, any substance having excellent elasticity and water and oil resistance, for example, natural rubber, synthetic resin such as silicone rubber and ethylene-propylene rubber (EPR) is used. Further, the stopper of the present invention can be made as a hollow body to reduce the pushing pressure and save the material cost. The stopper of the present invention can be easily mass-produced by a usual sphere molding method such as a normal semi-melt rotation molding method, a melt dropping method, and a mold casting method.

[0005]

[Action]

 Since the stopper of the present invention is a spherical elastic body, it can obtain good adhesion with the inner surface of the insertion hole of the waterproof connector even if it is pushed into the insertion hole of the connecting terminal having a circular inner cross section in any direction. In addition, since it is spherical in shape, it is compact, lightweight, and highly productive.

[0006]

【Example】

 Hereinafter, the plug of the present invention will be concretely described with reference to the drawings by an embodiment in which a waterproof connector is mounted. Example 1 A 16-pole type waterproof connector capable of connecting 16 pairs of connection terminals was fitted with the stopper of the present invention to investigate waterproofness. FIG. 1 is a vertical sectional view of the waterproof connector. A male housing 2 is fitted into the female housing 1 to form a housing room 3. An inner cross section for inserting a connection terminal into the housing room is formed at the rear end of the female / male housing 1, 2. Circular connection terminal insertion holes 4 are provided, 16 holes each for a total of 32 holes. 26 of the insertion holes 4 are connected with connection terminals 5 for connection, and 6 holes are formed of a spherical elastic plug 6 I put on. As described above, the waterproof inside the housing room 3 is made by the housing seal rubber 7 between the female and male housings, and the connection terminal insertion hole 4 is made by the rubber plug 8 attached to the base of the connection terminal 5 or the plug 6 described above. went. Comparative Example 1 The waterproof connector was waterproofed in the same manner as in Example 1 except that a conventional lip-type plug 16 having two lips 9 having the same shape as shown in FIG. 3A was used as the plug.

[0007] Twenty waterproof connectors thus waterproofed were each put in water and left for two hours under a condition of slight vibration, and then the inundation condition in the housing room was examined. As a result, no sign of water infiltration was found in the waterproof connector of Example 1, but in the comparative example, 4 out of 20 waterproof connectors were inundated. The cause of the inundation was that the plugs were installed with an inclination. In the above example, the stopper of the present invention was quickly put on without any special attention, but the conventional stopper used in the comparative example was put on carefully over time. In the above embodiment, the case where the plug of the present invention is applied to the waterproof connector of the automobile engine has been described. However, the plug of the present invention is an internal wiring connector of a mobile industrial machine, an internal wiring connector of a general consumer product placed outdoors. Alternatively, the same effect can be obtained by applying it to a wiring connector of a workpiece exposed to rainwater or salt water.

[0008]

【effect】

 As described above, since the stopper of the present invention is made of a spherical elastic body, it is easy to install, has excellent waterproofness, is small and lightweight, has excellent productivity, and is therefore inexpensive. , Has a remarkable industrial effect.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a state in which a plug of the present invention is attached to a waterproof connector.

FIG. 2 is an explanatory diagram of a waterproof connector.

FIG. 3 is a vertical and horizontal cross-sectional view showing a conventional plug and a state in which the plug is attached to a waterproof connector.

FIG. 4 is a vertical cross-sectional view showing a state where a conventional plug is attached to a waterproof connector while being inclined.

[Explanation of symbols]

 1 Female housing 2 Male housing 3 Housing room 4 Connection terminal insertion hole 5 Connection terminal 6 Plug made of spherical elastic body 16 Lip type plug

Claims (1)

Claims for utility model registration 1. A plug for a waterproof connector, which plug is fitted into a connection terminal insertion hole having a circular inner cross section, and which is made of a spherical elastic body.