JPH0211742Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a plug used for connecting a power supply cable of an automobile antenna, for example, and particularly relates to an improvement of a locking mechanism.

[Prior Art] A conventional plug-in plug of this type is connected to the end of a power supply cable of an automobile antenna, for example, and is inserted into a jack on the transmitter/receiver side at a suitable time to establish a connection. The above plug is
Generally, an insertion pin is installed at the tip of an insulating cylinder, and a spring is provided protruding from the outer circumference of the insulating cylinder to press against the inner circumferential surface of the jack.

[Problems to be solved by the invention] However, the above-mentioned conventional antenna device had the following problems. That is, in general, this type of plug has a very large spring pressure, so it is not easy to insert the plug into the jack, and there is no way to clearly confirm whether the plug is completely inserted into the jack. For this reason, it is easy for the plug to be inserted insufficiently, and moreover, the plug is often used without noticing that it is not fully inserted. Use under such conditions increases the contact resistance at the connection portion, making it impossible to perform good transmission and reception, and in extreme cases, there is a risk that the plug may fall off during use.

Therefore, the present invention makes it possible to clearly check whether the plug is completely inserted into the jack.
There is no risk of poor contact due to incomplete insertion or accidents of the plug falling off during use, and in addition, it allows for accurate insertion and removal of the plug into the jack.
To provide an insertion plug that has a simple structure and can be manufactured at low cost.

[Means for Solving the Problems] The present invention is characterized by taking the following measures in order to solve the above problems and achieve the objectives. In other words, the plug of the present invention has a plug body having a plug pin implanted at its tip, a connecting portion for connecting to the vicinity of the tip of the plug body, and a locking portion on the jack side at a position connected to this connecting portion. an engaging portion formed to be elastically deformable and engageable with the plug body; and a lead portion connected to the engaging portion and extending around the sides of the plug body to near the proximal end of the plug body. , an engagement release portion for deflecting the engagement portion at the end of the lead portion so as to disengage the engagement portion from the locking portion on the jack side, the locking portion being formed by bending and molding a spring wire; It is characterized by being equipped with a spring.

[Operation] By taking the above measures, only when the plug is completely inserted into the jack, a relatively large click feeling is transmitted to the fingers due to the engagement movement of the engaging part with the locking part. At the same time, the instantaneous movement of the disengagement part can be visually recognized. Further, the plug cannot be pulled out from the jack unless the engaged state is released by the engagement release portion. Furthermore, since the locking spring has a lead portion extending around the side of the plug body to near the proximal end of the plug body, it is possible to set a large amount of deflection due to the disengagement portion. becomes possible,
Even if the engaging portion is formed at a position far from the disengaging portion, the disengaging operation can be performed accurately. The locking spring can be easily manufactured by simply bending and molding a spring wire.

[Embodiment] FIGS. 1 to 3 are diagrams showing an embodiment in which the present invention is applied to an insertion plug for a power supply cable of an automobile antenna.

As shown in FIG. 1, the plug A has a locking spring 20 attached to a plug body 10. The plug body 10 includes a cylindrical body 12 having an insertion pin 11 implanted at its tip, and this cylindrical body 12.
It consists of a cable connection part 13 provided at the proximal end of the cable. A notch 14 is provided in a portion of the cable connection portion 13 to allow movement of the locking spring 20. 15 is a power supply cable for the antenna.

As shown in FIG. 2, the locking spring 20 has a connecting portion 21 that connects the plug body 10 to the vicinity of the tip of the cylindrical body 12, and a locking portion on the jack side at a position connected to the connecting portion 21. an engaging part 22 that is formed to be elastically deformable and engageable with the plug body 10;
a lead portion 23 extending to the vicinity of the proximal end of the lead portion 23; and a disengagement mechanism that deviates the engaging portion 22 at the distal end of the lead portion 23 so as to disengage the engaging portion 22 from the locking portion on the jack side. The portion 24 is formed by bending and molding a spring wire. Note that the coupling portion 21 of the locking spring 20 is connected to the power supply cable 15 inside the cylindrical body 12.
It is electrically connected to the shielding braided wire of
It also functions as a grounding contact.

On the other hand, the lead type jack B has an enlarged opening end of a sleeve 32 made of a conductor inserted inside an outer cylinder 31, and a locking groove 33 is formed in the inner center portion. ing. 34 is a connection cable for connecting with a transmitter/receiver.

In this embodiment configured in this way, when the plug A is inserted into the lead type jack B as shown by the arrow in FIG. Due to elastic deformation, it is pushed into the lead type jack B while being displaced in the axial direction. And the engaging part 22
When it reaches the position of the locking groove 33 of the lead type jack B, it is restored to its original state by the elasticity of the spring wire and becomes engaged with the locking groove 33. At this time, a relatively large click feeling generated when the engaging portion 22 is restored by the restoring force of the spring wire is transmitted to the fingers, so that it can be confirmed that the insertion has been completed. Furthermore, after the above condition is reached, even if you try to pull out the plug A from the lead jack B, the engaging part 2
2 is locked in the locking groove 33, so it cannot be easily pulled out. At this point as well, complete insertion of the plug 10 can be confirmed. Furthermore, at the moment of engagement, the engagement release portion 2
4 blinks, so you can visually confirm complete insertion. Connect plug A to lead type jack B
When it is necessary to pull out the engagement release part 24, the engagement release part 24 is pressed. Then, the engaging part 22 is displaced in the axial direction via the lead part 23 and separated from the locking groove 33, so it is sufficient to pull it out to the outside in this state. In this case, the lead portion 23 is installed in a manner that bypasses the side of the plug body 10, in other words, the lead portion 23 is installed so as to straddle the cylinder body 12, so that the displacement operation amount by the engagement release portion 24 is reduced. It is possible to set it to a large value. Therefore, even if the engaging portion 22 is formed at a position far from the disengaging portion 24, the disengaging operation can be performed accurately by applying the large amount of deviation. The locking spring 20 can be formed simply by bending and molding a spring wire, so it is easy to manufacture and can be manufactured at low cost.

4 and 5 are side views showing other embodiments of the present invention. This embodiment differs from the previous embodiment in that it is compatible with a flange type jack C. This flange type jack C has a cylindrical body 4.
an annular locking protrusion 4 having a flange 42 at one end of the cylindrical body 41 and protruding in the axial direction from the center of the cylindrical body 41;
3, which serves as a locking part. Note that mounting holes 44 and 45 are provided in the flange 42, and a connection terminal 46 is provided in the bottom surface of the cylindrical body 41.

According to this embodiment configured in this way, when the plug A is inserted into the flange-type jack C, the engaging portion 22 is elastically deformed to engage the locking protrusion 4.
3 and reaches the inner position, and becomes engaged at that position. Since everything other than the above is the same as that of the previous embodiment, the explanation will be omitted.

Note that the present invention is not limited to the above embodiments. For example, in the above embodiment, a spring wire is bent into an endless shape as the locking spring 20, and has a pair of left and right engaging portions 22 and a lead portion 23, but a single spring wire is used, and only one side of the spring wire is bent. It is good also as having the engaging part 22 and the lead part 23 of. It goes without saying that various other modifications can be made without departing from the gist of the present invention.

[Effects of the invention] The plug of the present invention has a plug body having an insertion pin implanted at its tip, a connecting portion for connecting to the vicinity of the tip of the plug body, and a connecting portion on the jack side at a position connected to this connecting portion. an engaging part that is formed so as to be able to elastically deform and engage with the engaging part of the plug; By bending and molding a spring wire, a lead part and a disengaging part that deflects the engaging part at the end of the lead part so as to disengage the engaging part from the locking part on the jack side are formed. It is characterized by being equipped with a formed locking spring.

Therefore, according to the present invention, only when the insertion plug is completely inserted into the jack, a relatively large click feeling due to the engagement movement of the engaging portion with respect to the locking portion is transmitted to the fingers, and at the same time the engagement occurs. The flashing movement of the release part can be seen. Further, the plug cannot be pulled out from the jack unless the engaged state is released by the engagement release portion. Furthermore, since the locking spring has a lead portion extending around the side of the plug body to near the proximal end of the plug body, it is possible to set a large amount of deflection due to the disengagement portion. Even if the engaging portion is formed at a position far from the disengaging portion, the disengaging operation can be performed accurately. The locking spring can be easily manufactured by simply bending and molding a spring wire.
As a result, it is possible to clearly check whether the plug has been completely inserted into the jack, and there is no risk of poor contact due to incomplete insertion or accident of the plug falling off during use. It is possible to provide an insertion plug that allows accurate insertion and removal operations, has a simple structure, and can be manufactured at low cost.

[Brief explanation of the drawing]

Figures 1 to 3 show an example in which the present invention is applied to a power supply cable plug for an automobile antenna, and Figure 1 shows an example in which the plug is combined with a lead type jack. FIG. 2 is a perspective view of the plug, and FIG. 3 is a side view, partially cut away, of the plug inserted into the lead-type jack. 4 and 5 are diagrams showing other embodiments of the present invention, and FIG.
The figure is a side view showing an example of a case where the plug is combined with a flange type jack, and FIG. 5 is a partially cutaway side view showing the state where the plug is inserted into the flange type jack. A... Plug, B... Lead type jack, C... Flange type jack, 10... Plug body, 11... Plug pin, 12... Cylindrical body, 13
... Cable connection part, 14 ... Notch part, 15 ...
Power supply cable, 20...Lock spring, 2
DESCRIPTION OF SYMBOLS 1... Connecting part, 22... Engaging part, 23... Lead part, 24... Engagement release part, 31... Outer cylinder, 32...
... Sleeve, 33 ... Locking groove, 34 ... Connection cable, 41 ... Cylindrical body, 42 ... Flange, 43 ...
...Latching protrusion, 44, 45...Mounting hole, 46...
Connecting terminal.

Claims (1)

[Scope of utility model registration request] A plug body with an insertion pin planted at the tip,
The plug body is equipped with a locking spring attached to the plug body, and the locking spring includes a coupling part for coupling with the vicinity of the tip of the plug body, and a locking part on the jack side at a position continuous with this coupling part. an engaging portion formed to be elastically deformable and engageable with the plug body; and a lead portion connected to the engaging portion and extending around the sides of the plug body to near the proximal end of the plug body. , an engagement release portion that deflects the engagement portion so as to disengage the engagement portion from the locking portion on the jack side at the end of the lead portion is formed by bending and molding a spring wire. A plug that is characterized by: