JPH10144385A - Wiring connector for illuminating lamp for shelf of showcase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the drip-proof, moisture-proof properties, and detachment operability of a wiring connector for an illuminating lamp for shelve built in a showcase. SOLUTION: This wiring connector is constricted by combining an electric outlet 8 in the electric power side and which is installed and buried in a back side panel of a case body and a plug 9 which is connected to a wire cord of an illuminating lamp for shelve to be inserted into the electric outlet 8 and the electric outlet 8 is so formed as to have a structure in which a socket part 8b is projected in a gun battery-like state in the center of the bottom of a cup-like installation base 8a and the plug is so formed as to have a structure in which an outer cylinder 8c is fitted in the installation base of the outlet while surrounding a connection pin 9b. In the circuit connector having such a structure for an illuminating lamp for selves, a cylindrical packing member 11 equipped with a fin is pressure-inserted in the circumferential face of the socket part 8b and in the outlet/plug connected state, the fin tip end of the packing member 11 is closely attached to the inner wall face of the plug outer cylinder in order to seal the connector and prevent infiltration of the electrode parts with liquid drips and moisture from the outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring connector for a shelf illumination light mounted on a product display shelf of a refrigerated multi-stage open showcase for a refrigerated multistage open showcase or the like.

[0002]

2. Description of the Related Art First, FIGS. 5 and 6 show a conventional structure of a multi-stage open showcase to which the present invention is applied and a connector for a shelf illumination light. First, in FIGS. 5 (a) and 5 (b), 1 is a case body of a showcase, 2 is an inner box of the case body 1, 3 is a merchandise display shelf arranged on the back panel of the inner box 2 arranged vertically and Reference numeral 4 denotes a shelf lighting lamp (fluorescent lamp) attached to the lower surface of the leading end of each shelf 3 for each product display shelf 3, reference numeral 5 denotes a cooler (evaporator of a refrigerator), and reference numeral 6 denotes a fan in the refrigerator. Wiring code 4 drawn from the lamp 4 fixture
a is connected to a power supply via a connector 7 mounted on the back panel of the inner box 2. Here, the connector 7 is the inner box 2
And a plug 9 connected to the wiring cord 4a of the shelf illumination light 4 and plugged into the outlet 8 for connection. With this structure, when removing the product display shelf 3 from the inside of the case body 1, the plug 9 is pulled out from the outlet 8.

FIGS. 6A to 6D show a detailed structure of a shelf illumination light connector used in a conventional showcase.
Shown in First, the outlet 8 is formed integrally with a socket portion 8b in which an electrode is assembled so as to protrude like a turret at the center of the bottom of a cup-shaped mounting base 8a as a resin molded product. The structure has a flange portion 8c and a pair of left and right engaging claws 8d. Then, as shown in FIG. 5 (b), the outlet 9 is fitted in a bayonet manner from behind into a mounting hole opened in the rear panel on the case side, and the rear panel is sandwiched between the flange 8c and the engaging claw 8d. To fix it in place.

On the other hand, the plug 9 is a resin molded product in which an outer cylinder 9c is integrally formed around a connection pin 9b protruding from a plug body 9a. When the plug 9 is inserted into the outlet 8 and connected, the outer cylinder 9 of the plug 9 is
c fits into the mounting base 8a of the outlet and covers the outer periphery of the socket 8b. As a result, the connector 7 becomes a drip-proof type, and even if dew condensation water or the like generated in the storage of the showcase is transmitted through the rear panel, water drops are directly supplied to the outlet 8,
It is possible to prevent the electrode portion of the plug 9 from wetting and to cause a short circuit or a short circuit.

[0005]

In the case where the above-mentioned connector has the conventional structure, if the end of the outer cylinder of the plug 9 does not completely adhere to the bottom surface of the mounting base of the outlet 8, the outside of the connector 9 may be condensed from the outside. Droplet and moisture are in the outer cylinder 9c
In addition, when the invading moisture freezes in the ice temperature range, the plug 9 is frozen in the socket portion 8b, so that the plug 9 cannot be pulled out. When growing in a nodular form, the ice may push out the plug 9 and cause a problem of accidentally dropping from the outlet 8.

Conventionally, as shown in FIG. 6, a cylindrical spacer 10 made of soft rubber or the like is closed by pressing between the socket 8b of the outlet 8 and the outer cylinder 9c of the plug 9. Some measures are taken to prevent the intrusion of liquid droplets and moisture from the outside. However,
The cylindrical spacer 10 is connected to the outer surface of the socket portion 8b,
When trying to fit tightly on the inner and outer circumferences so as to make close contact with the inner surface of the plug c, the outer diameter of the spacer 10 becomes larger than the inner diameter of the cover 9c, so that the operation of inserting the plug 9 into the outlet 8 becomes difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to solve the above-mentioned problems and to improve the drip-proof, damp-proof, and detachability with a simple structure. It is an object of the present invention to provide a connector for a showcase shelf illumination light.

[0008]

According to the present invention, in order to achieve the above object, according to the present invention, there is provided an outlet on a power supply side embedded in and mounted on a back panel of a case body, and the outlet connected to a wiring cord of a shelf illumination light. The socket has a structure in which the socket protrudes like a turret at the center of the bottom of the cup-shaped mounting base, and the plug surrounds the connecting pin and fits into the mounting base of the outlet. A shelf illuminating light connector having a structure having an outer cylinder shall be configured as follows.

1) A cylindrical packing member with a fin having a bellows-shaped cross section is pressed into the peripheral surface of the socket portion of the outlet, and the fin tip of the packing member is removed from the plug while the outlet / plug is connected. It is tightly attached to the inner wall surface of the cylinder and sealed to prevent liquid and moisture from entering the connection from outside. 2) A flat ring-shaped lip packing member is provided on the inner peripheral wall surface of the mounting base of the outlet so as to join the outer peripheral edge and project inward, and in a state where the outlet / plug is connected, the lip end of the packing member is plugged. A seal is attached to the outer wall surface of the outer cylinder to prevent liquid and moisture from entering the connection from outside.

[0010] 3) A flat ring-shaped lip packing member is provided on the outer peripheral wall surface of the plug outer cylinder by joining the inner peripheral edge and extending outward, and in a state where the outlet / plug is connected, the lip tip of the packing member is connected. It is tightly attached to the inner wall surface of the mounting base of the outlet and sealed to prevent the intrusion of droplets and moisture from the outside to the connection part. 4) The plug outer cylinder is loosely fitted on the periphery of the plug body, and external threads are formed on the inner peripheral wall of the outer cylinder, and packing members are provided on the upper and lower ends. Forms a female screw to be screwed with the male screw of the outer cylinder, and in a state where the outlet / plug is connected, the plug outer cylinder is screwed into the socket part of the outlet to press the packing member into pressure contact, and a droplet from the outside to the connection part is formed. ， Seal to prevent moisture penetration.

According to this configuration, when the plug is inserted and connected to the outlet, the fin of the soft packing member and the flexible tip of the lip come into close contact with the mating member, so that there is a gap between the external side of the connector and the internal electrode portion. Is almost completely hermetically sealed. Therefore, there is no intrusion of liquid droplets and moisture from the outside, and since the adhesiveness with the packing member is high, there is no danger that the plug will easily fall off even if the cord wired inside the warehouse is pulled by mistake. In particular, by screwing the cover of the plug into the plug receptacle of the outlet as in the above item 4), the connection between the plug and the outlet can be further ensured.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings of each embodiment, the same members corresponding to those in FIG. 6 are denoted by the same reference numerals. Embodiment 1 FIGS. 1 (a) and 1 (b) show an embodiment corresponding to claim 1 of the present invention. In this embodiment, a finned packing member 1 made of soft rubber and having a bellows-shaped cross section is formed on the outer peripheral surface of a socket portion 9b of an outlet 9.
1 is press-fitted and mounted in advance. The outer diameter d1 of the packing member 11 including the fin is set to be slightly larger than the inner diameter d2 of the outer cylinder 9c of the plug 9.

With this configuration, when the plug 9 is inserted into the outlet 8 from the front, the tip of the fin of the packing member 11 is slightly deformed and comes into close contact with the inner wall surface of the plug outer cylinder 9c. In addition, the air compressed in the outer cylinder 9 c by pushing the plug 9 escapes outward from the fin tip portion of the packing member 11. Thereby, the passage from the outside to the connection electrode portion of the plug / outlet through the gap between the plug outer cylinder 9c and the socket portion 8b of the outlet 8 is almost completely hermetically sealed, so that droplets and moisture from the outside to the electrode portion can be sealed. Almost completely prevent the intrusion of power, and high security against electric leakage and short circuit can be secured.

In addition, even if a slight pulling force is applied to the plug 9 in the plug / outlet connection state, the contact force between the fin tip of the packing member 11 and the plug outer cylinder 9c is large, and the plug 9 is pulled. And the inside of the packing member 11 has a negative pressure, so that the plug 9 does not easily come out and fall off. When the plug 9 is pulled off, if the outer cylinder 9c is slightly deformed so as to be crushed from the outside with the fingertip, the airtight seal of the packing member 11 is lost and air enters the cover from the outside. The plug 9 can be easily removed from the outlet 8.

[Embodiment 2] FIGS. 2A and 2B show an embodiment corresponding to claim 2 of the present invention. In this embodiment, instead of the bellows-shaped packing member 11 in the first embodiment, a flat ring-shaped outer peripheral edge is formed on the inner peripheral wall surface of the mounting base 8a of the outlet 8 by joining the outer peripheral edge. The inner diameter d3 of the lip packing member 12 is set to be slightly smaller than the outer diameter d4 of the outer cylinder 9c of the plug 9, and a projection 12a is formed on a part of the inner peripheral edge thereof. ing.

With this configuration, when the outlet / plug is connected, the tip of the lip of the packing member 12 comes into close contact with the peripheral wall surface of the plug outer cylinder 9c and hermetically seals it. The lip packing member 12 and the plug outer cylinder 9
The contact force with the plug c is large, so that the plug 9 can be prevented from falling off unexpectedly. Also, if you handle it slightly when pulling out the plug 9,
The projection 12a of the packing member 12 is deformed to form a gap between itself and the plug outer cylinder 8c, through which air enters from the outside, so that the plug 9 is pulled out with little resistance.

Embodiment 3 FIGS. 3A and 3B show an embodiment corresponding to claim 3 of the present invention. In this embodiment, the inner peripheral edge of a lip packing 13 similar to the flat ring-shaped lip packing member in the second embodiment is welded and joined to the peripheral surface of the plug outer cylinder 9c. The inner diameter d6 of the mounting base 8a of the outlet 8 is set to be slightly larger than the inner diameter d6, and a thick protrusion 13a is formed on a part of the outer peripheral edge of the packing member 13 to facilitate the operation of pulling out the plug 9. deep.

With this configuration, when the outlet / plug is connected, the tip of the lip of the packing member 13 comes into close contact with the inner peripheral wall surface of the mounting base 8a of the outlet 8, and hermetically seals. Droplet on the electrode,
Prevent moisture ingress. Embodiment 4 FIGS. 4A and 4B show an embodiment corresponding to claim 4 of the present invention. In this embodiment, the outer cylinder 9c of the plug 9 is separated from the plug main body 9a and is loosely fitted to the tip of the plug main body, and a male screw 9d is formed on the inner peripheral surface of the plug outer cylinder 9c. An O-ring shaped packing member 14 is attached to the upper and lower ends. On the other hand, on the outer peripheral surface of the socket portion 8b of the outlet 8, a female screw 8e screwed with the male screw 9d is formed.

With this configuration, when the plug 9 is connected to the outlet 8, after inserting the plug pin 9b into the socket portion 8b, the male screw 9d of the plug outer cylinder 9c is screwed into the female screw 8e of the socket portion 8b and joined. At the same time, the packing member 14 is pressed against the mating member to hermetically seal the space with the outside. By screwing and connecting the outlet 8 of the connector and the plug 9 in this manner, the plug 9 can be reliably prevented from falling off, and the reliability is improved.

[0020]

As described above, according to the structure of the present invention, in the operating state of the showcase, the intrusion of droplets and moisture into the connection portion between the plug and the outlet is almost completely prevented, thereby preventing the electric leakage accident. It is possible to provide a connector with a high practical value that exhibits excellent effects in reliability and handling, such as preventing the plug from falling off unexpectedly due to the adhesion of the packing member incorporated in the connector. it can.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a connector corresponding to a first embodiment of the present invention, where (a) is a cross-sectional side view of a plug and an outlet, and (b)
Is the external perspective view of the packing member

FIGS. 2A and 2B are configuration diagrams of a connector according to a second embodiment of the present invention, wherein FIG. 2A is a sectional side view of a plug and an outlet, and FIG.
Is a plan view of an outlet

3A and 3B are configuration diagrams of a connector corresponding to a third embodiment of the present invention, wherein FIG. 3A is a cross-sectional side view of a plug and an outlet, and FIG.
Is a plan view of the plug

4A and 4B are configuration diagrams of a connector corresponding to a fourth embodiment of the present invention, wherein FIG. 4A is a cross-sectional side view of a plug and an outlet, and FIG.
Is an enlarged sectional view of the plug outer cylinder

FIGS. 5A and 5B are configuration diagrams of an open showcase with a shelf lighting lamp to which the present invention is applied, wherein FIG. 5A is a cross-sectional side view of the entire showcase, and FIG.

6 is a conventional structural view of a connector for a shelf illumination light in FIG. 5, (a) is a sectional side view of a plug and an outlet, (b),
(c) and (d) are plan views of the plug, spacer, and outlet in (a), respectively.

[Explanation of symbols]

 3 merchandise display shelf 4 shelf illumination light 4a wiring cord 7 connector 8 outlet 8a mounting base 8b socket 8e female screw 9 plug 9a plug body 9b connection pin 9c outer cylinder 9d male screw 11-14 packing member

Claims (4)

[Claims] 1. A shelf lighting light wiring connector for connecting a wiring cord of a shelf lighting light mounted on a product display shelf of a showcase to a power supply, comprising a power supply side outlet embedded and mounted on a back panel of a case body. A plug connected to the wiring cord of the shelf illumination light and plugged into the outlet, and the outlet has a structure in which a socket portion protrudes like a turret at the center of the bottom of a cup-shaped mounting base, and the plug is a connection pin. And a cylindrical packing member with a fin is press-fitted on the peripheral surface of the socket portion, so that the socket / plug is connected. The tip of the fin of the packing member is brought into close contact with the inner wall surface of the plug outer cylinder, and sealed so as to prevent the intrusion of droplets and moisture from the outside to the electrode portion. Shelf lighting lamp wiring connector of Yokesu. 2. A shelf lighting light wiring connector for connecting a wiring cord of a shelf lighting light mounted on a product display shelf of a showcase to a power supply, comprising a power supply side outlet embedded and mounted in a rear panel of the case body. A plug connected to the wiring cord of the shelf illumination light and plugged into the outlet, and the outlet has a structure in which a socket portion protrudes like a turret at the center of the bottom of a cup-shaped mounting base, and the plug is a connection pin. A flat ring-shaped lip that has an outer cylinder that fits into the outlet mounting base and surrounds Provide a packing member,
The showcase is characterized in that the lip tip of the packing member is brought into close contact with the peripheral wall surface of the plug outer cylinder in a connected state of the outlet / plug to prevent the intrusion of droplets and moisture from the outside into the electrode portion. Wiring connector for shelf lighting. 3. A wiring connector for a shelf illumination light for connecting a wiring cord of a shelf illumination light mounted on a product display shelf of a showcase to a power supply, comprising a power supply side outlet embedded and mounted in a rear panel of the case body. A plug connected to the wiring cord of the shelf illumination light and plugged into the outlet, and the outlet has a structure in which a socket portion protrudes like a turret at the center of the bottom of a cup-shaped mounting base, and the plug is a connection pin. A flat ring-shaped lip packing member that has an outer cylinder that fits into the mounting base of the outlet so as to surround the plug and joins the inner peripheral edge on the peripheral wall surface of the plug outer cylinder and projects outward. When the outlet / plug is connected, the tip of the lip of the packing member is brought into close contact with the inner wall surface of the mounting base of the outlet, so that liquid droplets and moisture from the outside to the electrode portion are provided. Shelf illumination lamp wiring connector showcase, characterized in that the seal to prevent intrusion. 4. A wiring connector for a shelf illumination light for connecting a wiring cord of a shelf illumination light mounted on a product display shelf of a showcase to a power supply, comprising a power supply side outlet embedded and mounted on a rear panel of the case body. A plug connected to the wiring cord of the shelf illumination light and plugged into the outlet, and the outlet has a structure in which a socket portion protrudes like a turret at the center of the bottom of a cup-shaped mounting base, and the plug is a connection pin. The plug outer cylinder is loosely fitted on the periphery of the plug body, and a male screw is provided on the inner peripheral wall surface of the outer cylinder. While forming and providing packing members at the upper and lower ends, on the other hand, on the outer peripheral surface of the socket portion of the outlet is formed a female screw that is screwed with the male screw of the cover,
With the outlet / plug connected, the plug outer cylinder is screwed into the socket portion of the outlet to press the packing member in pressure contact, and sealed so as to prevent the intrusion of droplets and moisture from the outside into the electrode portion. Wiring connector for case lighting.