JPH0555471U - Waterproof structure for plug connection - Google Patents

Abstract

(57) [Summary] [Purpose] To ensure waterproofness between the plug and plug jack without weakening the connection force. [Structure] When the plug 1 is inserted and connected to the plug jack 2, the seal rubber 4 provided on the plug 1 is inserted into the recess 3a while elastically contacting the inner peripheral surface of the recess 3a of the main body case 3. At this time, an elastic force P1 that tries to return the seal rubber 4 to its original shape is exerted on the inner peripheral surface of the recess 3a that is in contact with the seal rubber 4. Therefore, the seal rubber 4 and the concave portion 3a are always in close contact with each other, and the waterproof function can be performed in this portion.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a waterproof structure of a plug connecting portion of a waterproof headphone stereo type cassette tape recorder or the like.

[0002]

[Prior Art]

 FIG. 2 shows a cross-sectional view of a conventional plug connecting portion waterproof structure.

Reference numeral 11 is a plug, 12 is a plug jack, and 13 is a main body case.

A cylindrical seal rubber 14 is sandwiched between the jack mounting hole 13a of the main body case 13 and the outer periphery of the plug connecting portion 12a of the plug jack 12 attached to the main body case 13, and the seal rubber 14 is exposed. The portion that is formed is the protruding portion 14a.

When the plug pin 11b of the plug 11 is inserted and connected to the plug jack 12, the body portion 11a of the plug 11 presses the protruding portion 14a of the seal rubber 14 to deform it.

At this time, the elastic force P2 acts on the body portion 11a so that the protruding portion 14a returns to its original shape. Therefore, the body portion 11a of the plug 11 and the protruding portion 14a of the seal rubber 14 are brought into close contact with each other. However, it has a waterproof function.

[0007]

[Problems to be solved by the device]

 In the above-described conventional waterproof structure for the plug connecting portion, the elastic force P2 applied to the main body portion 11a of the plug 11 acts in the direction of pulling out the plug 11, so that the connecting force between the plug 11 and the plug jack 12 is weakened.

Further, since the seal rubber 14 is sandwiched between the jack mounting hole 13 a of the main body case 13 and the outer periphery of the plug connection port 12 a of the plug jack 12, a ring is attached to the outside of the plug connection port 12 a of the plug jack 12. It could not be applied to a plug connection part with a multi-pole plug structure where terminals are provided.

[0009]

[Means for Solving the Problems]

 The present invention has been made for the purpose of solving the above problems. In a waterproof structure of a plug connecting portion using a seal rubber for a connecting portion between a plug and a plug jack, a tip portion of a plug body portion is tapered. A cylindrical seal rubber is provided.On the other hand, in the main body case to which the plug jack is attached, a recess is formed integrally with the main body case so that the inner diameter is slightly smaller than the outer diameter of the seal rubber. The tip of the seal rubber is elastically contacted with the inner peripheral surface of the recess.

[0010]

[Action]

 With the above configuration, when the plug is inserted and connected to the plug jack, the tip of the seal rubber that accompanies the plug makes elastic contact with the inner peripheral surface of the recess of the main body case, so that the seal rubber seals the plug and plug jack and connects. Protect the department.

Further, the force with which the sealing rubber makes elastic contact with the inner peripheral surface of the recess has a relationship at right angles with the force in the direction of pulling out the plug from the plug jack, and therefore, the connecting force between the plug and the plug jack is nothing. Has no effect.

[0012]

【Example】

 Hereinafter, a waterproof structure of a headphone plug according to an embodiment of the present invention shown in the drawings will be described in detail.

FIG. 1 is a cross-sectional view showing a plug connecting portion waterproof structure according to an embodiment of the present invention. Reference numeral 1 is a plug, 2 is a plug jack, and 3 is a main body case. At the tip of the main body 1a of the plug 1, a cylindrical seal rubber 4 is provided, which serves as a basic component for forming a waterproof structure and has a taper-like tip 4a. The recess 3a is formed integrally with the main body case 3 so as to have an inner diameter slightly smaller than the outer diameter of the tip portion 4a of the seal rubber 4.

When the plug pin 1b of the plug 1 is inserted and connected to the plug jack 2, the seal rubber 4 provided on the plug 1 comes into contact with the opening of the recess 3a of the body case 3, but the tip 4a of the seal rubber 4 is tapered. Since the seal rubber 4 is inserted into the recess 3a while elastically contacting the inner peripheral surface of the recess 3a, the plug 1 reaches the predetermined insertion position.

At this time, an elastic force P1 that tries to return the seal rubber 4 to its original shape is exerted on the inner peripheral surface of the concave portion 3a that is in contact with the seal rubber 4.

Therefore, the seal rubber 4 provided on the plug 1 always presses the inner peripheral surface of the concave portion 3a, so that the seal rubber 4 and the concave portion 3a are in close contact with each other. be able to.

As can be seen from the above description, in this embodiment, the sealing rubber 4 and the recessed portion 3a have a waterproof function, so that the internal structure is not affected at all.

Therefore, as shown in FIG. 1, a ring terminal 5 is provided outside the plug connection port 2 a of the plug jack 2, and a contact 6 that comes into contact with the ring terminal 5 is attached to the plug 1 when the plug 1 is inserted and connected. It is also effective for the provided multipolar plug structure.

[0019]

[Effect of the device]

 According to the present invention, when the plug is inserted and connected to the plug jack, the tip of the seal rubber attached to the plug makes elastic contact with the inner peripheral surface of the recess of the main body case. Can be sealed and the connection can be protected.

Further, the force of the seal rubber elastically contacting the inner peripheral surface of the recess has a force relationship in a direction perpendicular to the force of pulling out the plug from the plug jack, so that the connecting force between the plug and the plug jack is weakened. The connection state can be maintained without any.

[Brief description of drawings]

FIG. 1 is an explanatory view of a waterproof structure for a plug connecting portion in an embodiment of the present invention.

FIG. 2 is an explanatory view of a conventional plug connecting portion waterproof structure.

[Explanation of symbols]

 1 Plug 1a Main Body 2 Plug Jack 3 Main Body Case 3a Recess 4 Seal Rubber 4a Tip

Claims (1)

[Scope of utility model registration request] 1. In a waterproof structure for a plug connecting portion using a seal rubber at a connecting portion between a plug and a plug jack, a cylindrical seal rubber having a tapered tip is provided at a tip of a plug body, and a plug jack is The accompanying body case is integrally formed with a recess having an inner diameter slightly smaller than the outer diameter of the seal rubber, and when the plug and plug jack are connected, the tip of the seal rubber is formed on the inner peripheral surface of the recess. Waterproof structure with a plug connection that is elastically contacted.