JP4465298B2 - Wiring connection structure - Google Patents

Description

  The present invention relates to a wiring connection structure for connecting wirings.

  As a wiring connection structure for connecting wirings, a structure for connecting a plug and a socket is known. The plug is provided with an electrode part terminal, and the socket is provided with a receiving electrode in an insertion hole fitted with the electrode part terminal. By inserting and fitting the electrode terminal into the insertion hole, the plug-side wiring and the socket-side wiring are electrically connected (for example, see Patent Document 1).

  Such a wiring connection structure is tightly connected between the plug and the socket, particularly for a waterproof structure, when applied to a humid situation such as a showcase for displaying a refrigerated product. Further, under a low temperature environment, the socket is difficult to come off due to the contraction of the air inside the socket. As a result, it is possible to prevent the plug from falling off, and to prevent water from entering between the plug and the socket, causing electric leakage or rusting.

In order to ensure the connection between the plug and the socket, it is known that once the plug is attached to the socket, the fitting members respectively provided on the socket and the plug restrain each other and cannot be separated.
Japanese Patent Laid-Open No. 11-273775

  However, in the frozen showcase, there is the following problem in the waterproof configuration that does not leave once the plug is attached to the socket as described above. For example, when replacing a shelf with a lighting lamp connected to the plug together with the plug, it is difficult to remove the socket and the plug, and if you try to remove it forcibly, one or both of the socket and the plug will be broken. It is a problem.

  This makes it difficult to remove the socket and plug when replacing the case shelf.

  On the other hand, in order to facilitate removal of the socket and the plug, it is also known to simply connect the socket and the plug between the terminals without providing a fitting member for the socket and the plug. However, in this case, the lead wire of the plug may be caught on the product on the shelf, and the plug may be detached from the socket, resulting in poor contact.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a wiring connection structure that can be easily detached while a strong connection between a plug and a socket can be obtained.

The wiring connection structure according to the present invention that achieves the above object includes a plug having a rod-shaped electrode portion to which one cable is connected, and a receiving electrode terminal provided in an insertion hole into which the electrode portion is fitted. A socket in which the other cable is connected to the electrode terminal, and the two cables are electrically connected by fitting the plug and the socket in a humid environment such as a showcase. The plug has a plug main body for holding the one cable, and a handle is attached to a rotating shaft protruding from a side portion of the plug main body. The socket is fitted with the plug. A concavity is formed at the center, and a constraining portion is provided so as to protrude toward the center from the inner wall of the indentation, the socket body holding the other cable, and the handle portion, Removing the hook part engaged with the restraint part by rotating the handle part from the restraint part when the plug is fitted into the socket and overcoming the restraint part; A cylindrical portion formed at a tip of the plug body when the plug body is attached to the socket. Is inserted into an annular groove formed at the bottom of the recess, and the inner wall of the recess is in close contact with the waterproof packing attached to the plug.

When the plug is connected to the socket, the hook part gets over the restraint part and engages with the restraint part by inserting the plug into the socket, and the cable on the socket side and the cable on the plug side are electrically connected. be able to. In addition, when the plug is connected to the socket, the restraint part restrains the movement of the hook part in the direction in which the electrode part comes out of the insertion hole, so that the plug and socket provided with the hook part and the restraint part are surely removed. Can be prevented. Further, after the connection, by rotating the handle portion is rotated moving the hook portion, strut portion abuts against the bottom of the socket, Te by separating the socket body and the plug body by the action, the constraining portion The hook part can be released from the restriction, and the connection between the plug and the socket can be easily released as necessary. In particular, even in a humid environment such as a showcase displaying refrigerated products, even if the air inside the socket contracts, the connection between the plug and the socket can be easily released.
In addition, since the socket has an annular groove formed at the bottom of the central recess, the cylindrical portion of the plug body is inserted therein, and a waterproof packing is provided between the inner wall of the recess of the socket. Even in a humid environment, water does not enter the socket or plug.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view showing a wiring connection structure.

  As shown in FIG. 1, the wiring connection structure includes a socket 10 and a plug 20. By connecting the socket 10 and the plug 20, for example, the power source on the socket 10 side and the load on the plug 20 side are electrically connected, and power can be supplied to the load.

(Socket 10)
Hereinafter, the configuration of the socket 10 and the plug 20 will be described in detail.

  FIG. 2 is a view showing the socket, FIG. 2A is a front view of the socket, and FIG. 2B is a rear view of the socket. 3 is a cross-sectional view of the socket shown in FIG.

As shown in FIGS. 2 and 3, the socket 10 holds a plurality of cables 50 through which current flows by an insulating socket body 11 having a recess 11 c in the center.

The socket body 11 has an insertion hole 12 formed in the bottom 11b of the recess 11c . The insertion hole 12 is formed in a tubular shape toward the cable 50 introduced on the back side of the socket body 11, and a receiving electrode terminal made of a conductor such as metal is provided inside. The terminal in the insertion hole 12 is electrically connected to the cable 50 in the deep portion. The insertion hole 12 is provided at a position corresponding to an electrode portion 23 of the plug 20 described later. In this embodiment, although the case where the insertion hole 12 is three is shown, it is not limited to this.

An annular groove 13 is formed around the portion where the insertion hole 12 is provided. Groove portion 13, when mounting the plug 20 into the socket 10, the tip of the plug 20 is provided so as to be inserted into the socket 10. At this time, the inner wall 11a of the depression prevents immersion entry of water into the plug 20 to take Tagged waterproof packing closely wear to the electrode portion 23.

Also, the socket body 11 is restrained portion 14 is provided that protrudes toward the heart in the inner wall 11a or al. The restraining portion 14 is provided at a position substantially opposed to the inner wall 11 a of the socket body 11.

(Plug 20)
4A and 4B are diagrams showing the plug. FIG. 4A is a front view of the plug, FIG. 4B is a rear view of the plug, and FIG. 4C is a side view of the plug. 5 is a cross-sectional view of the plug shown in FIG. 4 as viewed from line 5-5.

  As shown in FIGS. 4 and 5, the plug 20 holds a plurality of cables 60 by an insulating plug body 21. The plug body 21 is provided with a cylindrical portion 22 at the tip. The center of the cylindrical portion 22 is recessed.

The electrode part 23 protrudes from the bottom of the hollow of the cylindrical part 22. The electrode portion 23 is a rod-shaped member formed of a conductor such as metal and is electrically connected to the cable 60.

As shown in FIGS. 4A and 4C , a rotary shaft X projects from the side of the plug body 21 , and a handle portion 24 is attached to be rotatable about the rotary shaft X. The handle portion 24 is open at the center so that the operator can hook his / her finger.

  A hook portion 25 is formed integrally with the handle portion 24. The hook portion 25 is formed in a hook shape with the tip opened outward. Since the hook portion 25 is formed integrally with the handle portion 24, the hook portion 25 rotates together with the rotation of the handle portion 24. In a state where the handle portion 24 stands, that is, in a state indicated by a solid line in FIG. 4C, the hook portion 25 is located on the cylindrical portion 22 side with respect to the rotation axis X and faces the outer side in the radial direction of the cylindrical portion 22. Open.

  In addition, the handle portion 24 is integrally formed with a tension portion 26. The strut 26 is formed such that the length from the tip T to the central axis X is longer than the length from the tip of the hook 25 to the central axis X.

  A rubber waterproof packing 27 is attached to the outer periphery of the cylindrical portion 22 in order to improve adhesion to the socket 10.

(Connection Status)
Next, how the socket 10 and the plug 20 are connected and how they are removed will be described.

  6 is a view showing a state in which the socket and the plug are connected, and FIG. 7 is a cross-sectional view taken along line 7-7 of FIG. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 6 and shows a state when the handle portion is rotated.

  The procedure for connecting the plug 20 to the socket 10 is as follows.

  First, as shown in FIG. 1, the plug 20 with the handle portion 24 raised is brought closer to the socket 10. And the electrode part 23 of the plug 20 and the position of the insertion hole 12 of the socket 10 are matched, and it is made to fit gradually. In the state where the tab is standing, the hook portion 25 of the plug 20 faces the socket 10 side and spreads toward the restraining portion 14 side of the socket 10, so that the hook portion 25 hits the restraining portion 14 of the socket 10.

Anyway, it brought close to the socket 10 to the plug 20, elastically deformed while contracted inwardly by the hook portion 25 is restrained portion 14, in its reaction, and push the restraining portion 14, and so over the restraining portion 14 . Gradually, the electrode portion 23 of the plug 20 fits into the insertion hole 12 of the socket 10. When the electrode portion 23 of the plug 20 fits entirely insertion hole 12 of the socket 10, the tip spread the hook portion 25 is Ru overcome completely to the back side of the restraining portion 14. At this point, constraining portion 14 which has been spread by the hook 25 and the hook portion 25 which has been elastically deformed contracted inwardly, both return to their original state make a noise, hook 25 Engages with the restraining portion 14 .

  Thereafter, the hook portion 25 is restrained by the restraining portion 14 and is prohibited from moving in the insertion direction of the plug 20. Thus, the socket 10 and the plug 20 are connected, and the cable 50 on the socket 10 side and the cable 60 on the plug 20 side are electrically connected. The connected state is as shown in FIGS.

  The procedure for removing the connected plug 20 and socket 10 is as follows.

Initially, as shown in FIG. 8A, the socket 10 and the plug 20 are connected with the handle portion 24 standing. Here, as shown in FIG. 8B, the handle portion 24 is tilted down. Then, as the handle portion 24 rotates, the hook portion 25 of the plug 20 rotates around the rotation axis X and moves. Since the rotational movement of the hook portion 25 at this time is not restrained by the restraining portion 14, the hook portion 25 is easily detached from the restraining portion 14. As the handle portion 24 rotates, the strut 26 also rotates about the rotation axis X and moves to the socket 10 side. For this reason, the protruding portion 26 hits the bottom portion 11 b of the socket 10 and starts to be extended between the socket 10 and the plug 20.

Further, as shown in FIG. 8C, when the handle portion 24 is tilted, the stretch portion 26 is stretched between the socket 10 and the plug 20, and the distance between the two begins to increase. Since the socket main body 11 and the plug main body 21 are separated from each other, the electrode portion 23 starts to come out from the insertion hole 12.

  At this time, the handle portion 24 is in a posture in which the handle portion 24 is tilted to the opposite side of the socket 10 so that the operator can easily pull it in the axial direction of the electrode portion 23, that is, the direction in which the electrode portion 23 is pulled out from the insertion hole 12. Yes. Therefore, when the operator puts a finger into the opening of the handle portion 24 or holds the handle portion 24 and puts a little force in the direction of pulling out the electrode portion 23 from the insertion hole 12, the electrode portion 23 is stretched. Since it has already been pulled out by the action of the portion 26, it can be easily pulled out from the insertion hole 12. When the handle portion 25 whose tip is projected in a circle is rotated, the lever force is slidably applied to the bottom surface of the recess of the socket 10 so that the plug and the socket are automatically detached.

  Thus, the socket 10 and the plug 20 can be easily removed.

As described above, in the wiring connection structure of this embodiment, when connecting the plug 20 into the socket 10, the movement direction of the hook portion 25 of the electrode portion 23 comes off from the insertion hole 12 is restraining portion 14 to restrain Therefore, the plug 20 and the socket 10 provided with the hook portion 25 and the restraining portion 14 can be firmly connected, and the drop-out can be reliably prevented. On the other hand, after connection, by rotationally moving the hook portion 25, it is possible to release the restraint of the hook portion 25 by the restraining portion 14, if desired, you can easily remove the plug 20 and the socket 10.

  Further, when the connection between the socket 10 and the plug 20 is released, if the handle portion 24 is tilted, the posture of the handle portion 24 becomes easy for the operator to pull the electrode portion 23 in the axial direction. 20 can be removed more easily.

  Further, when the connection between the socket 10 and the plug 20 is released, the protruding portion 26 becomes a lever along with the rotation of the hook portion 25 and is extended between the plug 20 and the socket 10. 20 can be removed. The socket 10 and the plug 20 can be removed more easily.

  In addition, at the moment when the socket 10 and the plug 20 are completely connected, the hook portion 25 and the restraining portion 14 that have passed through the restraining portion 14 and returned to their original shapes emit sound. Therefore, the operator can confirm the complete connection between the socket 10 and the plug 20 by sound.

  In the above embodiment, the example in which the restraint portion 14 is provided in the socket 10 and the handle portion 24, the hook portion 25, and the projecting portion 26 are provided in the plug 20 has been described. However, it is not limited to this. The restraint portion 14 may be provided on the plug 20, and the handle portion 24, the hook portion 25, and the projecting portion 26 may be provided on the socket 10.

It is a perspective view which shows a wiring connection structure. It is a figure which shows a socket, (A) is a front view of a socket, (B) is a rear view of a socket. It is sectional drawing seen from the 3-3 line of the socket shown in FIG. It is a figure which shows a plug, (A) is a front view of a plug, (B) is a rear view of a plug, (C) is a side view of a plug. It is sectional drawing which looked at the plug shown in FIG. 4 from the 5-5 line. It is a figure which shows the state which connected the socket and the plug. It is sectional drawing seen from the 7-7 line | wire of FIG. It is sectional drawing seen from the 8-8 line | wire of FIG. 6, and is a figure which shows a mode when a handle | steering-wheel part is rotated.

Explanation of symbols

10 ... socket,
11 ... Socket body,
11a ... the inner wall of the socket body,
11b ... the bottom of the dent,
11c ... depression,
12 ... insertion hole,
13 ... groove,
14 ... restraint part,
20 ... plug,
21 ... Plug body,
22 ... cylindrical part,
23 ... electrode part,
24 ... handle part,
25 ... hook part,
26 ... the bracing part,
50, 60 ... cable,
X: Support shaft .

Claims (1)

A plug having a rod-like electrode portion to which one cable is connected, and a socket in which a receiving electrode terminal is provided in an insertion hole into which the electrode portion is fitted, and the other cable is connected to the receiving electrode terminal; In the wiring connection structure used in a humid environment such as a showcase, wherein both the cables are electrically connected by fitting the plug and the socket,
The plug has a plug body that holds the one cable, and a handle portion is attached to a rotating shaft that protrudes from a side portion of the plug body.
The socket has a socket body for holding the other cable, in which a recess into which the plug is fitted is formed in the center, and a restraining portion is provided so as to protrude toward the center from the inner wall of the recess.
When the plug is fitted to the socket, the handle is engaged with the hook over the restraint, and the hook engaged with the restraint by turning the handle is restrained. When removed from the part, a tension part that abuts against and presses the bottom of the socket so as to separate the socket body and the plug body from each other, and
When the plug is attached to the socket, a cylindrical portion formed at the tip of the plug body is inserted into an annular groove formed at the bottom of the recess, and a waterproof packing in which the inner wall of the recess is attached to the plug; A wiring connection structure characterized by close contact .

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