JP2010215174A - Lighting system for ceiling - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting system for a ceiling capable of preventing the short-circuiting of a circuit due to condensation water dropped from the vehicle body panel on a vehicle ceiling and fouling of a cover lens due to the condensation water. <P>SOLUTION: The lighting system 41 for the ceiling includes: a unit body 51 storing a lamp 43 for lighting and a switch circuit turning on the lamp 43, and assembled to the interior wall material 47 of the vehicle ceiling; and the cover lens 55 covering the vehicle cabin 53 side of the unit body 51. The lighting system 41 for the ceiling also includes a condensation preventive panel 61 dividing the space 59 between a vehicle body panel 57 covering the outside of the interior wall material 47 and the unit body 51 into two layers of a panel side air layer 76 and a unit side air layer 77 by a panel body 71 covering the upper part of the unit body 51. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a ceiling lighting device that is assembled to a vehicle ceiling for lighting in a vehicle interior, and in particular, prevents a problem from occurring due to intrusion of dew condensation that occurs in a vehicle body panel that is an outer wall material of the vehicle ceiling. For improvements.

Condensation is likely to occur on the inner surface of the vehicle body panel, which is the outer wall material of the ceiling of the vehicle, due to a temperature difference from the outside air.
For this reason, in the ceiling lighting device that is assembled to the vehicle ceiling for lighting in the vehicle interior, consideration is required so as not to cause problems due to intrusion of dew condensation generated on the inner surface of the vehicle body panel.

4 and 5 show a conventional example of a ceiling lighting device assembled to a vehicle ceiling.
The ceiling lighting device 1 shown here is disclosed in Patent Document 1 below, and contains a lighting lamp 3 and a switch circuit 5 for lighting the lamp 3, and is an interior wall material for a vehicle ceiling. And a cover lens 11 that covers the vehicle compartment side of the unit main body 9 and adjusts the irradiation range of illumination light projected from the lamp 3 to the vehicle compartment side. ing.

  As shown in FIG. 5, the switch circuit 5 includes a slider body 14 having a switch lever 13, contacts 15 for intermittently switching the switch circuit while clicking the slider body 14, a ball 16, a coil spring 17, and a cover 18. Etc.

  As shown in FIG. 5, the unit main body 9 includes a bulb housing space 23 for housing the lamp 3 in a housing 21 formed of an insulating resin material, and a circuit for connecting the lamp 3 to the switch circuit 5. A circuit arrangement portion 29 for arranging the component 25 and the electric wire 27 for feeding is provided.

A reflector 33 that reflects illumination light emitted from the lamp 3 toward the vehicle body panel 31, which is an outer wall material of the ceiling of the vehicle, is assembled in the bulb housing space 23.
An opening 35 for releasing the heat generated by the lamp 3 is provided in the upper part of the bulb housing space 23.

In the case of the ceiling lighting device 1 shown in FIGS. 4 and 5, even if the condensation 37 generated on the inner surface of the vehicle body panel 31 becomes water droplets 38 and drops on the ceiling lighting device 1 side, the water droplets 38 are generated in the circuit. The circuit arrangement portion 29 is provided on the surface of the housing 21 on the side of the passenger compartment so as not to cause inconvenience such as a short circuit due to adhesion.
The circuit components 25 and the electric wires 27 arranged in the circuit arrangement unit 29 are covered and protected by the circuit unit cover 28.

JP 2002-067679 A

  As described above, in the ceiling lighting device 1 shown in FIGS. 4 and 5, the circuit arrangement portion 29 is set on the lower surface of the housing 21 facing the passenger compartment side, and faces the opposite side to the vehicle body panel 31. Therefore, the water droplet 38 does not fall on the circuit component 25 and the like, and it is possible to prevent the circuit from being short-circuited or the circuit from being damaged by the dripping condensed water.

  However, the dew condensation water that has dropped into the ceiling lighting device 1 as water droplets enters the inside through the opening 35 in the upper part of the bulb housing space 23 and accumulates in the cover lens 11, thereby contaminating the cover lens 11. Could occur.

  Accordingly, an object of the present invention is to solve the above-mentioned problems, and it is possible to prevent a short circuit of the circuit caused by the condensed water dripping from the vehicle body panel on the vehicle ceiling and the cover lens from being contaminated by the condensed water. The object is to provide a ceiling lighting device.

The above-described object of the present invention is achieved by the following configuration.
(1) a unit main body that houses an illumination lamp and a switch circuit that lights the lamp and is assembled to an interior wall member of a vehicle ceiling;
A cover lens for adjusting the irradiation range of illumination light projected from the lamp to the passenger compartment side, covering the passenger compartment side of the unit main body,
A ceiling lighting device comprising:
A dew condensation prevention panel that divides a space between a vehicle body panel covering the outside of the interior wall material and the unit main body into two layers of a panel side air layer and a unit side air layer by a panel main body covering the upper side of the unit main body. A ceiling lighting device characterized by comprising:

  (2) The outer surface of the panel main body facing the vehicle body panel is provided with an inclination for guiding the condensed water dripped from the vehicle body panel to the outer peripheral side. The ceiling illuminating device according to (1), wherein a peripheral wall for blocking dew condensation water guided to the outer periphery of the panel main body by an inclination is provided.

  (3) A drain hole for discharging the condensed water accumulated in the outer periphery of the panel main body to the outer region of the unit main body is provided in the outer periphery of the panel main body, and at the drainage position of the condensed water from the drain hole. The ceiling illuminating device according to (2) above, further comprising water absorption means.

  (4) The inner surface of the panel body facing the lamp is formed as a concave curved surface on the lamp side with the position facing the lamp as a top, and the inner surface is formed of a material having high light reflection performance. The ceiling lighting device according to any one of (1) to (3) above, wherein

  (5) In the dew condensation prevention panel, the engagement means projecting on the outer surface side of the panel body is engaged with a mounting portion on a reinforcement that crosses between the interior wall material and the vehicle body panel. The ceiling illumination device according to any one of (1) to (4), wherein the ceiling illumination device is suspended by the reinforcement.

  According to the configuration of (1) above, the panel main body of the dew condensation prevention panel covering the upper portion of the unit main body has a space between the unit main body and the vehicle body panel in two layers of the panel side air layer and the unit side air layer. It divides and suppresses that the warm air of the unit side air layer contacts the inner surface of the body panel above the unit body directly.

  Therefore, the temperature difference between the inside and outside of the vehicle body panel is alleviated, and it is possible to suppress the occurrence of dew condensation on the inner surface of the vehicle body panel due to the sudden temperature difference. In addition, even if condensation occurs on the inner surface of the vehicle body panel and drops as water droplets, the upper part of the unit body is covered by the panel body, preventing the condensed water from entering the unit body. can do.

  Therefore, it is possible to prevent the condensed water from adhering to the circuit in the unit body and short-circuiting the circuit, and it is also possible to prevent the cover lens from being soiled by the entered condensed water.

According to the configuration of (2) above, the dew condensation on the body panel above the unit body and dripped onto the panel body of the condensation prevention panel flows to the outer peripheral side along the inclination of the outer surface of the panel body. It collects in the outer peripheral part of the panel main body enclosed by the surrounding wall.
Therefore, it is possible to prevent the dew condensation adhering to the panel body from scattering unambiguously around the panel body due to the influence of acceleration or the like during travel of the vehicle, and soiling the interior wall material around the panel body.

  According to the configuration of (3) above, the condensed water accumulated on the outer peripheral portion of the panel main body is sequentially discharged from the drain hole provided in the outer peripheral portion of the panel main body to the water absorbing means and is held by water absorption. In other words, because the place where the condensed water is drained is limited, even if the condensed water is generated more than the amount of retention on the panel body, the condensed water will not leak from the panel body to an unspecified place, It is possible to prevent an unspecified area on the interior wall material around the panel body from being contaminated by condensed water.

  According to the configuration of (4) above, since the inner surface of the panel body functions as a reflector that reflects the light of the lamp toward the cover lens, the amount of illumination light emitted from the cover lens when the lamp is turned on increases. The illuminance of the ceiling lighting device can be improved.

  According to the configuration of (5) above, the dew condensation prevention panel can be firmly fixed in a state where it does not contact any of the vehicle body panel and the interior wall material.

  According to the ceiling lighting device of the present invention, the panel main body of the dew condensation prevention panel covering the upper portion of the unit main body has two layers of the panel side air layer and the unit side air layer in the space between the unit main body and the vehicle body panel. The warm air in the unit-side air layer is prevented from coming into direct contact with the inner surface of the vehicle body panel above the unit body.

  Therefore, it is possible to suppress the occurrence of dew condensation on the inner surface of the vehicle body panel due to a rapid temperature difference. In addition, even if condensation occurs on the inner surface of the vehicle body panel and drops as water droplets, the upper part of the unit body is covered by the panel body, preventing the condensed water from entering the unit body. can do.

  Therefore, it is possible to prevent the condensed water from adhering to the circuit in the unit body and short-circuiting the circuit, and it is also possible to prevent the cover lens from being soiled by the entered condensed water.

It is a disassembled perspective view of one Embodiment of the illuminating device for ceilings concerning this invention. It is AA sectional drawing of FIG. 1, and is a longitudinal cross-sectional view which shows the attachment state to the vehicle ceiling part of the illuminating device for ceilings shown in FIG. It is explanatory drawing of the function as a reflector of the inner surface of the panel main body shown in FIG. It is a longitudinal cross-sectional view which shows the attachment state to the wall material for interiors of the conventional illuminating device for ceilings. It is a disassembled perspective view of the unit main body shown in FIG.

  Hereinafter, a preferred embodiment of a ceiling lighting device according to the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 and 2, a ceiling lighting device 41 according to an embodiment of the present invention accommodates a lighting lamp (bulb) 43 and a switch circuit 45 for lighting the lamp 43, and has a vehicle ceiling. The unit main body 51 assembled to the lamp mounting window 48 of the interior wall material 47 of the interior, the adjustment of the irradiation range of the illumination light projected from the lamp 43 to the vehicle compartment 53 side, covering the vehicle compartment 53 side of the unit main body 51, etc. A cover lens 55, a vehicle body panel (roof panel) 57 that covers the outside of the interior wall material 47 as a vehicle ceiling, and a dew condensation prevention panel 61 disposed in a space 59 between the unit body 51. .

  An electric wire (wire harness) 62 laid in the space 59 for power feeding is connected to the switch circuit 45.

A lamp bezel 63, which is a frame for engaging the unit main body 51, is attached to the periphery on the back surface side of the lamp mounting window 48.
The unit main body 51 has a holding claw 51a that holds the interior wall material 47 and the lamp bezel 63, and is attached to the interior wall material 47 by engagement with the holding claw 51a.

  The cover lens 55 is formed of a resin material that can transmit the illumination light emitted from the lamp 43, and is fitted and attached to the opening of the unit body 51 on the side of the passenger compartment 53.

  The dew condensation prevention panel 61 according to the present embodiment is an integrally molded product made of resin. The panel main body 71 covers the upper portion of the unit main body 51, and the panel main body 71 protrudes from the outer peripheral portion of the panel main body 71 toward the vehicle body panel 57. A peripheral wall 73 integrally formed on the entire circumference of the outer peripheral portion and an engaging means 75 protruding from the outer surface of the panel body 71 facing the vehicle body panel 57 are provided.

The panel body 71 is formed in a sufficient size to cover the entire upper surface of the unit body 51.
In addition, as shown in FIG. 2, the panel body 71 divides the space 59 above the unit body 51 into two layers of a panel side air layer 76 and a unit side air layer 77.

  As a result, as shown in FIG. 2, the outside of the vehicle body panel 57 is affected by the low temperature layer due to the cold outside air, the interior of the passenger compartment 53 is a warm layer adjusted by air conditioning, and the unit side air layer 77 is affected by the temperature on the passenger compartment 53 side. As a result, the panel side air layer 76 becomes a sub-low temperature layer that is lower than the unit side air layer 77 due to the influence of outside air, and the temperature change inside and outside the vehicle body panel 57 changes. Alleviated.

  In the case of this embodiment, as shown in FIG. 2, the outer surface 71a of the panel body 71 facing the vehicle body panel 57 is provided with an inclination 83 that guides the condensed water 81 dripped from the vehicle body panel 57 to the outer peripheral side. .

  The peripheral wall 73 dams up and accumulates the dew condensation water 81 guided to the outer periphery of the panel body 71 by the inclination of the outer surface 71a.

  As shown in FIG. 1, a drain hole 85 is provided around the outer periphery of the panel main body 71 to discharge the condensed water 81 accumulated in the outer periphery of the panel main body 71 to an area outside the unit main body 51.

  The arrangement of the drain hole 85 is set so as to be located outside the upper surface region of the unit main body 51. This is a consideration for preventing the condensed water 81 discharged from the drain hole 85 from dropping on the unit main body 51.

Although not shown, a water absorbing means is provided at the drainage position of the condensed water 81 from the drain hole 85.
The water absorbing means is preferably a porous material such as a sponge suitable for absorbing water, and a porous sound absorbing material or a heat insulating material can also be used.

Further, in the present embodiment, as shown in FIGS. 2 and 3, the inner surface 71 b of the panel main body 71 facing the lamp 43 is formed into a curved surface 87 having a concave on the lamp 43 side with the position facing the lamp 43 as the top. Forming.
Further, the inner surface 71b is formed of a material that is white-colored or has a high light reflecting performance in order to improve the reflecting performance of the illumination light emitted from the lamp 43 to the inner surface 71b.

As shown in FIG. 2, the dew condensation prevention panel 61 described above traverses between the interior wall material 47 and the vehicle body panel 57 with the engaging means 75 protruding on the outer surface 71 a side of the panel body 71. By being engaged with the attachment portion 89 a on the lean reinforcement 89, the lean reinforcement 89 is suspended.
The engagement means 75 achieves coupling with the reinforcement 89 by a pair of elastic engagement pieces 75b projecting from the tip of the coupling shaft portion 75a engaging with a hole as the attachment portion 89a.

In the ceiling lighting device 41 described above, the panel main body 71 of the dew condensation prevention panel 61 covering the upper side of the unit main body 51 allows the space 59 between the unit main body 51 and the vehicle body panel 57 to pass through the panel-side air layer 76. The unit-side air layer 77 is divided into two layers, and the warm air of the unit-side air layer 77 is prevented from directly contacting the inner surface of the vehicle body panel 57 above the unit body 51.
Accordingly, the temperature difference between the inside and outside of the vehicle body panel 57 is alleviated, and the occurrence of condensation on the inner surface of the vehicle body panel 57 due to the abrupt temperature difference can be suppressed.

  Furthermore, as shown in FIG. 2, even if condensation 80 is generated on the inner surface of the vehicle body panel 57 and drops as water droplets, the upper portion of the unit main body 51 is covered with the panel main body 71. It is possible to prevent the condensed water 81 from entering the unit main body 51.

  Therefore, it is possible to prevent the condensed water 81 from adhering to the circuit in the unit main body 51 and short-circuiting the circuit, and it is also possible to prevent the cover lens 55 from being soiled by the condensed water 81 that has entered.

  Further, in the ceiling lighting device 41 of the present embodiment, the outer surface 71a of the panel body 71 facing the vehicle body panel 57 is provided with an inclination 83 for guiding the condensed water 81 dripped from the vehicle body panel 57 to the outer peripheral side. A peripheral wall 73 is provided around the outer periphery of the main body 71 to block the dew condensation water 81 guided to the outer periphery of the panel main body 71 by the inclination 83 of the outer surface 71a. For this reason, the dew condensation water 81 condensed on the vehicle body panel 57 above the unit main body 51 and dripped onto the panel main body 71 of the dew condensation prevention panel 61 flows to the outer peripheral side along the inclination of the outer surface 71a of the panel main body 71, It collects in the outer peripheral part of the panel main body 71 enclosed by the surrounding wall 73. FIG.

  Therefore, it is possible to prevent the dew condensation water 81 adhering to the panel body 71 from scattering unambiguously around the panel body 71 due to the influence of acceleration or the like during traveling of the vehicle, and soiling the interior wall material 47 around the panel body 71. be able to.

  In general, a situation in which condensation does not occur is longer than a situation in which condensation occurs. In a situation where condensation does not occur, for example, the remaining condensed water 81 is Start evaporation.

  Therefore, when the dew condensation water 81 collected on the outer peripheral part of the panel main body 71 is small, the dew condensation water 81 accumulated on the panel main body 71 is extinguished by natural evaporation accompanying an increase in the outside air temperature without particularly discharging. be able to.

  Further, in the ceiling lighting device 41 of the present embodiment, as shown in FIG. 1, the drain hole 85 that discharges the dew condensation water 81 accumulated around the outer periphery of the panel main body 71 to the region outside the unit main body 51 is provided on the panel. In addition to being provided on the outer periphery of the main body 71, a water absorption means (not shown) is provided at the drainage position of the condensed water 81 from the drain hole 85.

Therefore, the dew condensation water 81 collected on the outer peripheral portion of the panel main body 71 is sequentially discharged from the drain hole 85 provided in the outer peripheral portion of the panel main body 71 to the water absorbing means and is absorbed and retained.
Further, since the accumulated dew condensation water 81 is held by the water absorption means via the drain hole 85, the dew condensation water 81 does not accumulate excessively on the outer peripheral portion of the panel body 71.

  That is, since the place where the dew condensation water 81 is drained is limited, even when the dew condensation water 81 is generated more than the storage amount on the panel main body 71, the dew condensation water 81 leaks from the panel main body 71 to an unspecified place. In other words, it is possible to prevent the unspecified region on the interior wall material 47 around the panel body 71 from being contaminated by the dew condensation water 81.

  The water absorption means can return to the initial dry state by discharging the retained condensed water 81 to the air layer by natural evaporation accompanying an increase in the outside air temperature.

  Further, in the ceiling lighting device 41 of the present embodiment, as shown in FIGS. 2 and 3, the lamp 43 having the inner surface 71 b of the panel main body 71 facing the lamp 43 as the top facing the position facing the lamp 43. A curved surface 87 having a concave side is formed, and the inner surface 71b is colored in white, or the inner surface 71b is formed of a material having high light reflection performance.

  Therefore, as shown in FIG. 3, the inner surface 71 b of the panel main body 71 functions as a reflector that reflects the light 91 of the lamp 43 toward the cover lens 55, so that the light is emitted from the cover lens 55 when the lamp 43 is turned on. The amount of illumination light increases, and the illuminance of the ceiling illumination device 41 can be improved.

Further, in the ceiling lighting device 41 of the present embodiment, as shown in FIGS. 1 and 2, the dew condensation prevention panel 61 is provided with an engaging means 75 projecting on the outer surface 71 a side of the panel body 71 for interior use. By being engaged with a mounting portion 89 a on a reinforcement 89 that crosses between the wall material 47 and the vehicle body panel 57, it is suspended by the reinforcement 89.
Therefore, the dew condensation prevention panel 61 can be firmly fixed in a state where it does not contact any of the vehicle body panel 57 and the interior wall material 47.

  Moreover, when the reinforcement 89 is plate-shaped, the air layer 93 between the reinforcement 89 and the panel main body 71 functions as a heat insulation layer, and the temperature change of the panel side air layer 76 is further alleviated. And the occurrence of condensation on the inner surface of the vehicle body panel 57 can be further suppressed.

  In addition, as the reinforcement 89 to which the dew condensation prevention panel 61 is attached, a dedicated reinforcement for the ceiling lighting device 41 may be provided, or the vehicle body panel 57 and the interior wall for reinforcement of the vehicle body panel 57. You may make it utilize the existing roof reinforcement arrange | positioned in the space 59 between the materials 47. FIG.

  The present invention is not limited to the above-described embodiments, and can be appropriately modified and improved. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

41 Lighting equipment for ceilings 43 Lamps (bulbs)
45 switch circuit 47 interior wall material 48 lamp mounting window 51 unit main body 51a gripping claw 53 vehicle compartment 55 cover lens 57 vehicle body panel 59 space 61 dew condensation prevention panel 71 panel main body 71a outer surface 71b inner surface 73 peripheral wall 75 engaging means 75a coupling Shaft 75b Elastic engagement piece 76 Panel side air layer 77 Unit side air layer 81 Condensed water 89 Reinforcement

Claims (5)

A unit main body that accommodates an illumination lamp and a switch circuit that lights the lamp, and is assembled to an interior wall member of the vehicle ceiling,
A cover lens for adjusting the irradiation range of illumination light projected from the lamp to the passenger compartment side covering the passenger compartment side of the unit body;
A ceiling lighting device comprising:
A dew condensation prevention panel that divides a space between a vehicle body panel covering the outside of the interior wall material and the unit main body into two layers of a panel side air layer and a unit side air layer by a panel main body covering the upper side of the unit main body. A ceiling lighting device characterized by comprising:   The outer surface of the panel body facing the vehicle body panel is provided with an inclination for guiding condensed water dripped from the vehicle body panel to the outer peripheral side, and the outer periphery of the panel body is provided with the inclination of the outer surface. The ceiling illuminating device according to claim 1, wherein a peripheral wall for blocking dew condensation water guided around the outer periphery of the panel body is provided.   A drain hole for discharging condensed water collected in the outer periphery of the panel main body to an outer region of the unit main body is provided in the outer periphery of the panel main body, and a water absorbing means is provided at the drainage position of the condensed water from the drain hole. The ceiling lighting device according to claim 2, further comprising:   The inner surface of the panel body facing the lamp is formed as a concave curved surface on the lamp side with the position facing the lamp as a top, and the inner surface is formed of a material having high light reflection performance. The illumination device for ceiling according to any one of claims 1 to 3, wherein the illumination device is for a ceiling.   The dew condensation prevention panel is formed by engaging engagement means projecting on the outer surface side of the panel main body with a mounting portion on a reinforcement that traverses between the interior wall material and the vehicle body panel. The ceiling lighting device according to any one of claims 1 to 4, wherein the ceiling lighting device is suspended from the reinforcement.

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