JPH11273775A - Power connection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power connection device for a showcase that can prevent electrical leakage securely and can also prevent dust or the like from accumulating in a power socket. SOLUTION: In a power socket 23 to be installed in a showcase or the like, a protrusion 51 to be fitted to a grounding plug-in hole 35 of an electrode part 31 is formed on a cap 49 detachably installed in the power socket 23. In addition, in the power socket 23 wherein generally U-shaped holes 39 are formed in a peripheral wall 25 of the power socket 23 and fixing claws 41 for fixing the socket are formed there. windbreak plates 43 to pass cool air surmounting the generally U-shaped holes 39 are formed on the peripheral wall 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply connection device for a showcase for supplying power to a fluorescent lamp or the like.

[0002]

2. Description of the Related Art In general, in a showcase or the like, a power supply connecting device comprising a power supply socket installed in a cabinet of a showcase main body and a power supply plug inserted into the power supply socket and supplying power to a fluorescent lamp or the like is provided. Provided.

In a showcase equipped with such a power supply connection device, when a cooling operation is performed in a state where the electrode portion of the power supply socket is exposed, when the temperature inside the refrigerator decreases and dew condensation water is generated, the dew condensation water is generated. Electric leakage may occur due to penetration into the inside of the electrode portion. In order to prevent such a leakage, a power supply socket provided with a cap for covering the electrode portion has been proposed.

[0004] In general, the showcase is provided with a partition plate for partitioning the interior of the showcase main body from the cool air passage surrounding the interior of the showcase. When the power supply socket is fixed to the partition plate, the power supply socket is fitted into the hole for the power supply socket provided in advance in the partition plate from the inside of the refrigerator toward the cold air passage side, and approximately U formed on the peripheral wall of the power supply socket. The power socket was fixed to the partition plate by locking the remaining portion of the peripheral wall inside the letter-shaped hole to the partition plate on the side of the cool air passage.

[0005]

However, in the power supply connection device in which the cap covers the electrode portion of the power socket as described above, the cap that covers the electrode portion may come off, and the electrode portion of the power socket may be removed. When the cooling operation of the showcase is performed in the state where is exposed, the temperature of the atmosphere of the cap decreases, and condensation occurs at the power socket,
There is a problem that electric leakage and the like are likely to occur.

In the power supply connection device in which the power supply socket is fixed to the partition plate by the peripheral wall remaining portion as described above, the cool air in the cool air passage of the showcase enters the power supply socket through the substantially U-shaped hole. However, there is a problem that dust and the like contained in the entered cool air accumulate in the power supply socket.

It is an object of the present invention to provide a power supply connection device for a showcase which solves the above-mentioned problems of the prior art, reliably prevents electric leakage, and does not accumulate dust and the like in a power supply socket.

[0008]

According to the first aspect of the present invention,
In a power supply connection device comprising a power supply socket and a power supply plug installed in a storage of a showcase main body, the power supply socket includes a cap for detachably covering an electrode portion to which the power supply plug is connected, and the cap includes It is characterized in that a projection is provided to fit into the electrode insertion port of the electrode portion.

According to the present invention, when the electrode portion of the power supply connection device is covered with the cap, the projection fits into the electrode insertion port, so that the cap can be securely fixed to the electrode portion.

According to a second aspect of the present invention, there is provided a power supply connection device comprising a power supply socket and a power supply plug installed in a storage of a showcase main body, wherein the power supply socket has a detachable electrode portion to which a power supply plug is connected. And a cap accommodating portion formed so as to accommodate the cap, wherein the cap is provided with a notch for exposing the electrode portion when the cap is accommodated in the cap accommodating portion. It is a feature.

According to the present invention, when the power plug is inserted into the electrode portion of the power socket, the cap can be stored in the cap storage portion of the power socket, so that troubles such as loss of the cap can be prevented.

The invention described in claim 3 is the first or second invention.
In the invention described above, a grounding pin is provided on the power supply plug in addition to the power supply pin, and the length of the grounding pin is formed to be longer than the length of the power supply pin.

According to the present invention, when the power plug is fitted into the power socket, the positioning of the power plug may be performed with reference to the grounding pin, which facilitates the positioning when the power plug is fitted.

According to a fourth aspect of the present invention, there is provided a partition plate for partitioning the interior of the showcase main body from the cold air passage, and a power supply socket protruding toward the cold air passage is mounted on the partition plate from the inside of the refrigerator. In the power supply connection device, the peripheral wall remaining portion inside the substantially U-shaped hole formed in the peripheral wall of the power socket is locked to the partition plate on the side of the cool air passage, and the power socket is fixed to the partition plate. The peripheral wall of the power socket is provided with a windproof plate for flowing cool air over the substantially U-shaped hole.

According to the present invention, since the cool air flowing through the cool air passage side of the power supply socket moves so as not to enter the substantially U-shaped hole, the cool air on the cool air passage side does not enter the power supply socket, and the cool air flows into the cool air passage. Accumulation of dust and the like contained in the power socket can be prevented.

According to a fifth aspect of the present invention, there is provided a partition plate for partitioning the interior of the showcase main body from the cold air passage, and a power socket protruding toward the cold air passage is mounted on the partition plate from the inside of the refrigerator. In the power supply connection device, the peripheral wall remaining portion inside the substantially U-shaped hole formed in the peripheral wall of the power socket is locked to the partition plate on the side of the cool air passage, and the power socket is fixed to the partition plate. A discharge plate is provided inside the peripheral wall of the power socket so as to discharge cold air entering through the substantially U-shaped hole into the refrigerator.

According to the present invention, since the cool air that has entered the power socket is discharged to the outside of the power socket, it is possible to prevent dust and the like contained in the cool air from accumulating in the power socket.

[0018]

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

In FIG. 1, reference numeral 1 denotes a showcase provided with the power supply connection device according to the present embodiment. The showcase 1 is provided with a refrigerator 3, and a cool air passage 5 is provided below, behind, and above the refrigerator 3.

A cooler blower 7 and a cooler 9 are provided in the cool air passage 5. During the cooling operation, as indicated by the arrow, the cool air in the refrigerator 3 is sucked into the cool air passage 5 through the suction port 11, and then rises after being sucked into the blower 7 for the cooler.
It is cooled by the cooler 9, descends from the outlet 13, cools the inside 3, and returns to the cool air passage 5 again through the suction port 11. Reference numeral 15 denotes a heat insulating panel.

In the compartment 3, a three-stage display shelf 17 is provided.
Fluorescent lamps 21 are provided on the back side of the display shelf 17, and these fluorescent lamps 21 illuminate products displayed on the display shelf 17 or the like. Between the interior 3 and the cool air passage 5, a lower partition plate 19a,
A back side partition plate 19b and an upper side partition plate 19c are provided.

A plurality of power supply sockets 23 constituting a power supply connection device are provided on the back side partition plate 19b.

As shown in FIG. 2A, the power supply socket 23 has an elliptical shape and is made of a synthetic resin or the like.
A peripheral wall 25 is formed on the outer periphery of the power socket 23, an outward flange 25 a (FIG. 2B) is formed on the peripheral wall 25, and a recess 27 is formed inside the peripheral wall 25.

A ring-shaped groove 29 is formed at the bottom 27a of the recess 27, and an electrode portion 31 is formed inside the groove 29. The electrode portion 31 has two power supply insertion ports. 33
And one grounding insertion port 35 are provided. The power outlet 33 and the ground outlet 35 are electrically connected to corresponding lead wires 37.

A pair of fixing bases 38 are formed on the bottom 27a of the recess 27, and the fixing bases 38 have projections 38a.
(FIG. 2B) is formed, and each projection 38a is fitted in a receiving hole 49c (FIG. 2B) provided in the pair of arm portions 49a, and a cap 49 composed of the arm portion 49a and the cap body 49b is formed. It is rotatably supported. A projection 51 is provided on the bottom surface of the cap body 49b.

On the peripheral wall 25, as shown in FIG. 2C,
A substantially U-shaped hole 39 is formed, and two fixed claws 41 (remaining peripheral wall portions) 41 are formed inside the substantially U-shaped hole 39, and these fixed claws 41 are laterally arranged as shown in FIG. 2D. It protrudes.

The power supply socket 23 is connected to the back side partition plate 1 described above.
9C, the power supply socket 23 is mounted to the socket hole 23a provided in the back partition plate 19b by protruding from the inside of the refrigerator 3 toward the cool air passage 5, as shown in FIG. 2C. The power supply socket 23 is fixed by engaging the end 41 a of the fixing claw 41 of the socket 23 with the back partition plate 19 b on the side of the cool air passage 5.

In this embodiment, as shown in FIG. 2D, windproof plates 43 are integrally molded on both sides of the substantially U-shaped hole 39. Therefore, even when the cooling operation is performed in the showcase 1, the cool air moves over the fixed claw 41 by the fixed claw 41 as indicated by the broken arrow. Therefore, it is prevented from entering the recess 27 or the groove 29 through the substantially U-shaped hole 39, and dust and the like included in the cool air are prevented from accumulating in the bottom 27 a and the groove 29 of the recess 27.

FIGS. 2A and 2D show the inner peripheral surface of the peripheral wall 25.
As shown in FIG. 5, a U-shaped discharge plate 45 is formed integrally with the peripheral wall 25 so as to straddle the substantially U-shaped hole 39. The bottom end of the discharge plate 45 is connected to the bottom 27a of the recess 27 (not shown), and the top end of the discharge plate 45 extends to the same height as the outward flange 25a. Even if the cold air enters through the substantially U-shaped hole 39, it flows in the direction of the dashed arrow in FIG. 2C.
Dust and the like contained in the cold air are not covered by the bottom 27a of the recess 27 or the groove 29.
Is prevented from accumulating in the

A power plug 52 (FIGS. 3A and 3B) is connected to the electrode portion 31 of the power socket 23. The power plug 52 includes a movable portion 53 and a cylindrical portion 55 formed of a synthetic resin or the like. Two power supply pins 57 and one grounding pin 59 longer than the power supply pins 57 are provided on a bottom 55a inside the cylindrical portion 55. Also, the inner circumferential portion of the cylindrical portion 55 extends in the circumferential direction.
The convex portions 61 are formed integrally with the cylindrical portion 55.

When the power plug 52 is inserted into the electrode portion 31 of the power socket 23, as shown in FIG. 2B, the cap 49 is rotated in the N1 direction to expose the electrode portion 31, and the power pin 57 of the power plug 52 is exposed. And the ground pin 59 may be inserted into the power outlet 33 and the ground outlet 35 of the power socket 23, respectively. At this time, the grounding pin 59 is longer than the power supply pin 57, and only one grounding pin 59 first comes into contact with the grounding insertion port 35, so that the positioning of the power supply plug 52 is facilitated. When the power plug 52 is inserted into the power socket 23,
Since the above-mentioned convex portion 61 and the circumferential portion of the electrode portion 31 are in contact with each other, intrusion of dew condensation water and the like is prevented, and occurrence of electric leakage and the like is prevented.

When the power plug 52 is removed from the electrode portion 31 of the power socket 23, the cap 49 is rotated in the N2 direction to cover the electrode portion 31 with the cap 49. At this time, since the projection 51 of the cap 49 is configured to fit into the grounding insertion port 35, the cap 4
9 and the electrode part 31 are securely fixed, and the cap 49 is prevented from coming off.

As described above, since the cap 49 is rotatably fixed to the power supply socket 23, the cap 49 must not be lost, and the position must be adjusted when the electrode portion 31 is covered with the cap 49. Absent.

FIGS. 4 to 6 show another embodiment.

As shown in FIG. 4A, a cap 71 according to another embodiment has an arc-shaped notch 73 and has a substantially U-shape. A peripheral wall 75 is formed on the outer periphery of the cap 71, a recess 77 is formed inside the peripheral wall 75, and a cylindrical cover portion 7 is provided on the opposite side of the bottom 77 a of the recess 77.
9 is formed. As shown in FIG.
As shown in FIG. 7, a projection 81 for fixing the cap is provided.

When a power plug is inserted into the power socket 83 having such a cap 71, as shown in FIG.
So that the cap storage portion P inside the peripheral wall 87 is exposed.
Fit into

When the power plug is removed from the power socket 83, the cap 71 fitted in the cap storage portion P is removed, and as shown in FIG.
1 is fitted upside down at a position Q inside the peripheral wall 87, and the electrode portion 85 of the power socket 83 is covered with the cover portion 79. At this time, the projection 81 of the cap 71 is fitted into the grounding insertion port 88 (FIG. 5), so that the cap 71 is securely fixed to the power socket 83.

As described above, the electrode portion 8 of the power supply socket 83
When the power plug is inserted into the power supply 5, the cap 71 can be stored in the cap storage portion of the power socket 83, so that trouble such as loss of the cap 71 can be prevented.

FIG. 7 shows still another embodiment.

A recess 92 is formed in the power supply socket 91, and a ring-shaped groove 99 is provided in the bottom 92a of the recess 92. An electrode 93 is provided inside the groove 99. The unit 93 is provided with a power supply outlet 94 and a grounding outlet 95. Power socket 91 is cap 9
The cap 96 is provided with a pin portion 97 to be inserted into a pin receiving hole of the concave portion 92. The cap 96 is turned around the pin portion 97 in the direction of the dashed arrow N3 to rotate the electrode portion 93. Can be coated. A projection 98 is formed on the cap 96. When the electrode section 93 is covered with the cap 96, the projection 98 is
4, the cap 96 can be securely fixed.

Although the present invention has been described based on one embodiment, the present invention is not limited to this. In the present embodiment, the projections 51, 81, 98 are connected to the grounding slot 3
5, 87, and 94, but may be configured to fit into the power outlets 33, 85, and 94.

[0042]

According to the first aspect of the present invention, the power socket has a cap for detachably covering the electrode portion to which the power plug is connected, and the cap is fitted to the electrode insertion hole of the electrode portion. Since the protrusions are provided, the protrusions fit into the electrode insertion holes when the electrode portion of the power supply connection device is covered with the cap, and the cap can be securely fixed to the electrode portion.

According to the second aspect of the present invention, the power supply socket includes a cap for detachably covering the electrode portion to which the power supply plug is connected, and a cap storage portion formed to receive the cap. Has a notch that exposes the electrode portion when the cap is stored in the cap storage portion, so that when the power plug is inserted into the electrode portion of the power socket, the cap can be stored in the cap storage portion of the power socket. Can be prevented.

According to the third aspect of the present invention, the power supply plug is provided with a grounding pin in addition to the power supply pin, and the length of the grounding pin is formed longer than the length of the power supply pin. When the power plug is fitted into the power socket, the positioning of the power plug may be performed with reference to the grounding pin, which facilitates the positioning when the power plug is fitted.

According to the fourth aspect of the present invention, since the windproof plate for passing the cool air over the substantially U-shaped hole is provided on the peripheral wall of the power socket, the cool air flowing through the cool air passage side of the power socket is substantially prevented. It moves so as not to enter the U-shaped hole, so that the cool air on the side of the cool air passage does not flow into the power supply socket, and it is possible to prevent dust and the like contained in the cool air from accumulating in the power supply socket.

According to the fifth aspect of the present invention, since the discharge plate for discharging the cool air entering through the substantially U-shaped hole to the inside of the refrigerator is provided inside the peripheral wall of the power socket, the dust and the like contained in the cool air are removed from the power supply. Accumulation in the socket can be prevented.

[Brief description of the drawings]

FIG. 1 is a diagram showing a structure of a showcase provided with a power supply connection device according to an embodiment of the present invention.

2A and 2B show a power supply socket of the power supply connection device, wherein FIG. 2A is a plan view, FIG. 2B is a cross-sectional view taken along line I of FIG.
(C) is a side view, and (D) is a rear view.

3A and 3B show a power plug fitted into a power socket, wherein FIG. 3A is a plan view and FIG. 3B is a cross-sectional view taken along line II of FIG.

4A and 4B show a cap according to another embodiment, wherein FIG. 4A is a plan view and FIG. 4B is a cross-sectional view taken along line III in FIG.

FIG. 5 is a plan view showing a state where the cap of FIG. 4 is stored in a cap storage portion of a power socket.

FIG. 6 is a plan view showing a state where the electrode portion of the power socket is covered with the cap of FIG. 4;

FIG. 7 is a plan view showing a power socket according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Showcase 3 Inside 5 Cold air passage 23, 83, 91 Power supply socket 25, 75 Peripheral wall 31, 89, 93 Electrode part 33, 85, 94 Power supply port 35, 87, 95 Grounding port 39 Substantially U V-shaped hole 41 Fixed claw (remaining part of peripheral wall) 43 Windproof plate 45 Discharge plate 49, 71, 96 Cap 51, 81, 98 Projection 52 Power supply plug 57 Power supply pin 59 Grounding pin 73 Notch P Cap storage section

Claims (5)

[Claims] 1. A power supply connection device comprising a power supply socket and a power supply plug installed in a storage of a showcase main body, wherein the power supply socket includes a cap for detachably covering an electrode portion to which the power supply plug is connected. A power supply connecting device, wherein the cap is provided with a projection that fits into an electrode insertion port of the electrode portion. 2. A power supply connection device comprising a power supply socket and a power supply plug installed in a cabinet of a showcase main body, wherein the power supply socket includes a cap for removably covering an electrode portion to which the power supply plug is connected, A power supply connection device, comprising: a cap storage portion formed so as to be capable of storing the cap, wherein the cap is provided with a cutout for exposing the electrode portion when the cap is stored in the cap storage portion. . 3. The power supply plug according to claim 1, wherein a grounding pin is provided in addition to the power supply pin, and the length of the grounding pin is formed to be longer than the length of the power supply pin. Power connection equipment. 4. A partition for partitioning the interior of the showcase main body from the cold air passage, a power socket protruding toward the cold air passage is mounted on the partition from the inside of the refrigerator, and a peripheral wall of the power socket is provided on a peripheral wall of the power socket. In the power supply connection device in which the peripheral wall remaining portion inside the formed substantially U-shaped hole is locked to the partition plate on the cold air passage side and the power socket is fixed to the partition plate, the peripheral wall of the power socket is A power supply connecting device, wherein a windproof plate is provided for flowing cool air over the substantially U-shaped hole. 5. A partition plate for partitioning the interior of the showcase body from the cold air passage, a power socket protruding toward the cold air passage is mounted on the partition plate from the inside of the refrigerator, and a peripheral wall of the power socket is provided on the peripheral wall of the power socket. In a power supply connection device in which the remaining portion of the peripheral wall inside the formed substantially U-shaped hole is locked to the partition plate on the side of the cold air passage and the power socket is fixed to the partition plate, the inside of the peripheral wall of the power socket is And a discharge plate for discharging cold air entering through the substantially U-shaped hole into the storage.