JP5201732B2 - Car interior lighting unit - Google Patents

Description

  The present invention relates to an in-vehicle interior lighting unit installed on a vehicle interior ceiling or a vehicle interior door surface.

The following patent document describes an illumination unit attached to a vehicle interior ceiling.
The lighting unit described in the following Patent Document 1 uses a flexible printed circuit body for a circuit body for connecting a switch circuit, a light source, and the like arranged in the unit housing, so that the height of the unit is kept low. ing.
5 to 8 show the structure of a conventional in-vehicle indoor lighting unit using the flexible printed circuit body as described above.

  The in-vehicle interior lighting unit 1 shown in FIG. 5 to FIG. 8 controls a resin unit housing 2 assembled on a ceiling in a vehicle interior, an LED (light emitting diode) 4 as a light source, and the operation of the LED 4. Switch circuit 5, an electronic component 6 such as a resistance element connected between LED 4 and switch circuit 5, and printed circuits 9 a, 9 b, 9 c, to which these LED 4, switch circuit 5, and electronic component 6 are connected. And a press contact terminal 13 for connecting an external electric wire 11 to the printed circuit on the flexible printed circuit body 8.

  The unit housing 2 has a substantially box shape, and mounting spaces 2a and 2b are formed on both upper and lower sides as shown in FIG.

  As shown in FIG. 8A, the flexible printed circuit body 8 is mounted in a light source connection portion 8a having a printed circuit (not shown) to which the LED 4 is connected and a mounting space 2a on the upper side of the unit housing 2. Circuit portion 8b.

As shown in FIG. 8A, the mounting circuit portion 8b is formed with printed circuits 9a and 9b that are conductively connected via the electronic component 6, and a printed circuit 9c to which the switch circuit 5 is connected. .
The light source connection portion 8a is provided with a print circuit (not shown) connected to the print circuit 9c as a print circuit for connecting the LED 4.

  The printed circuits 9a and 9b of the mounting circuit portion 8b are provided with element soldering portions 15a and 15b for soldering the leads of the electronic component 6, as shown in FIG. 8A. As shown, the electronic component 6 is soldered.

  The pressure contact terminal 13 is formed by integrally forming a circuit body connection terminal portion 13a connected to the printed circuit of the mounting circuit portion 8b and a pressure contact blade 13b for pressure connection of the electric wire 11 by press molding of a metal plate. It is mounted in the lower mounting space 2b.

The circuit body connection terminal portion 13a and the press contact blade 13b are formed in shapes protruding in opposite directions.
The circuit body connection terminal portion 13a has a tip portion penetrating through the bottom wall 2c of the unit housing 2 partitioning the mounting space 2a and the mounting space 2b, from the back surface side of the mounting circuit portion 8b to the printed circuit. Connected. As shown in FIG. 7, the bottom wall 2c of the unit housing 2 is provided with a through hole 2d through which the tip of the circuit body connection terminal portion 13a is inserted.

JP 2001-171430 A

  However, as shown in FIG. 6, the conventional unit housing 2 in which the mounting space 2 a in which the switch circuit 5 is mounted and the mounting space 2 b in which the press contact terminal 13 is mounted individually is provided in the unit housing 2. The height dimension H becomes larger. For this reason, it is difficult to install the vehicle so that it does not protrude toward the passenger compartment, such as in the ceiling of a vehicle where a large accommodation height cannot be secured in the installation space. The problem was that the design of interior lighting was limited.

  An object of the present invention is to solve the above-described problems, and can reduce the height of a unit that accommodates a switch circuit and a pressure contact terminal. Therefore, even an installation space with a small accommodation height protrudes toward the vehicle compartment side. It is an object of the present invention to provide an in-vehicle interior lighting unit that can be easily installed without increasing the degree of freedom in designing the interior lighting of the vehicle interior.

The above-described object of the present invention is achieved by the following configuration.
(1) a unit housing in which a mounting space is formed;
A flexible printed circuit body having a light source connecting portion to which a light source is connected and a mounting circuit portion laid in the mounting space, wherein the light source connecting portion and the mounting circuit portion are electrically connected by a printed circuit;
A switch circuit connected to the printed circuit of the mounting circuit unit to control the operation of the light source;
A pressure contact terminal made of a metal plate, which is mounted on the unit housing, comprising a circuit body connection terminal portion connected to the printed circuit of the mounting circuit portion and a pressure contact blade for press-connecting an electric wire;
With
The vehicle interior lighting unit, wherein the press contact terminal and the switch circuit are mounted side by side on the same mounting surface of the mounting circuit unit.

  (2) The in-vehicle indoor lighting unit according to (1), wherein the press contact terminal is provided with a housing fixing portion that penetrates the flexible printed circuit body and is fixed to the unit housing.

  (3) The in-vehicle room according to (2), wherein the housing fixing portion is accommodated and held in a terminal engaging recess formed in a bottom wall of the unit housing forming the mounting space. Lighting unit.

  According to the configuration of (1) above, the mounting space for the switch circuit and the mounting space for the press contact terminal share a single mounting space, so that each is individually provided on both sides of the bottom wall of the unit housing. Compared with the conventional in-vehicle indoor lighting unit, the height dimension of the unit housing that accommodates the switch circuit and the press contact terminal can be reduced.

  Therefore, it is easy to install in a small installation space without protruding to the passenger compartment side, for example, the design of the interior lighting of the vehicle interior is almost flush with the surface of the ceiling wall. Thus, the degree of freedom in designing the interior lighting of the vehicle can be improved.

  In addition, since the press contact terminal is made of a metal plate, it has excellent heat transfer characteristics. Since this press contact terminal is stacked on the mounting circuit part of the flexible printed circuit body, the press contact terminal generates heat from the printed circuit of the mounting circuit part. It effectively functions as a heat radiating part that radiates heat to the outside.For example, even when an electronic part that easily generates heat such as a resistor is mounted on the mounting circuit part, it is easy to dissipate the heat generated by the electronic part, and the temperature of the unit is increased. Can be suppressed.

  According to the configuration of (2) above, it is possible to securely fix the press contact terminal to the unit housing without causing an increase in the number of parts due to the addition of a dedicated part for fixing.

  According to the configuration of (3) above, the housing fixing portion of the press contact terminal that passes through the flexible printed circuit body and is fixed to the unit housing is housed and held in the terminal engaging recess formed in the bottom wall of the unit housing, Does not protrude outward. Therefore, it is possible to prevent the housing fixing portion of the press contact terminal from contacting an external conductor and causing an accident such as a short circuit.

  According to the vehicle interior lighting unit according to the present invention, the mounting space for the switch circuit and the mounting space for the press contact terminal share a single mounting space. Compared with the conventional in-vehicle indoor lighting unit provided in the above, the height dimension of the unit housing that accommodates the switch circuit and the press contact terminal can be reduced.

  Therefore, it is easy to install in a small installation space without protruding to the passenger compartment side, for example, the design of the interior lighting of the vehicle interior is almost flush with the surface of the ceiling wall. Thus, the degree of freedom in designing the interior lighting of the vehicle can be improved.

  In addition, since the press contact terminal is made of a metal plate, it has excellent heat conductivity, and since this press contact terminal is directly stacked on the mounting circuit part of the flexible printed circuit body, the press contact terminal is a printed circuit of the mounting circuit part. It effectively functions as a heat dissipating part that dissipates the heat generated from the outside.For example, even when an electronic component that easily generates heat, such as a resistor, is mounted on the mounting circuit portion, Temperature rise can be suppressed.

It is a perspective view of one embodiment of a vehicle-mounted room lighting unit according to the present invention. It is BB sectional drawing of FIG. It is a disassembled perspective view of the vehicle-mounted room lighting unit shown in FIG. (A) is explanatory drawing of the element soldering part and terminal fixing | fixed part which were formed in the mounting circuit part of the flexible printed circuit body shown in FIG. 3, (b) is an electronic component and a press-contact terminal assembled | attached to the said mounting circuit part. It is explanatory drawing of the state. It is a perspective view of the conventional vehicle interior lighting unit. It is AA sectional drawing of FIG. It is a disassembled perspective view of the vehicle-mounted room lighting unit shown in FIG. (A) is explanatory drawing of the element soldering part formed in the mounting circuit part of the flexible printed circuit body shown in FIG. 7, (b) is explanatory drawing of the state by which the electronic component was soldered to the said mounting circuit part. is there.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a preferred embodiment of a vehicle interior lighting unit according to the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 to 4, the in-vehicle interior lighting unit 21 according to the embodiment includes a resin unit housing 23 that is assembled to a ceiling or a door panel in a vehicle interior of the vehicle, and an LED (light emitting device) as a light source. Diode) 4, a switch circuit 5 for controlling the operation of the LED 4, an electronic component 6 such as a resistance element connected between the LED 4 and the switch circuit 5, and the LED 4, the switch circuit 5, and the electronic component 6. Is connected to the thin film-like flexible printed circuit body 26 having the printed circuits 25a, 25b, 25c... And the printed circuits 25a, 25b,. Pressure contact terminal 28.

  The unit housing 23 has a substantially box shape, and, as shown in FIG. 2, a single mounting space 23c opened to the upper side is formed by a bottom wall 23a and a side wall 23b erected around the unit wall 23a. Has been.

  As shown in FIG. 3, the flexible printed circuit body 26 includes a light source connection portion 26 a having a printed circuit (not shown) to which the LED 4 is connected and a mounting circuit portion 26 b laid in the mounting space 23 c on the upper side of the unit housing 23. And have.

As shown in FIG. 4A, the mounting circuit portion 26b is formed with printed circuits 25a and 25b that are conductively connected via the electronic component 6 and a printed circuit 25c to which the switch circuit 5 is connected. .
The light source connection portion 26a is provided with a print circuit (not shown) connected to the print circuit 25c as a print circuit for connecting the LED 4.

  As shown in FIG. 4A, the printed circuits 25a and 25b of the mounting circuit portion 26b are provided with element soldering portions 30a and 30b for soldering the leads of the electronic component 6, as shown in FIG. As shown, the electronic component 6 is soldered.

  As shown in FIG. 4A, a terminal placement area 29 for connecting the press contact terminal 28 is set in the printed circuit 25b. The terminal placement area 29 is formed with an opening 32 through which a housing fixing portion 28a of a press contact terminal 28, which will be described later, is inserted.

  Further, as shown in FIG. 4A, the element soldering portion 30 b provided in the printed circuit 25 b is disposed adjacent to the terminal placement area 29. As a result, as shown in FIG. 4B, the electronic component 6 disposed on the mounting circuit portion 26 b comes close to the press contact terminal 28, and heat generated from the electronic component 6 is easily conducted to the press contact terminal 28.

  The press contact terminal 28 is formed by press-molding a metal plate, and is disposed in close contact with the upper surface of the printed circuit 25b of the mounting circuit portion 26b and electrically connected to the printed circuit 25b, The above-mentioned housing fixing portion 28a extending substantially perpendicularly from both ends of the circuit body connection terminal portion 28b and penetrating through the opening 32, and the both sides of the circuit body connection terminal portion 28b are connected to the electric wire 11 by pressure contact. And a pair of press contact blades 28c. The press contact blade 28c extends to the opposite side to the housing fixing portion 28a.

In the case of the present embodiment, as shown in FIG. 2, the press contact terminal 28 and the switch circuit 5 are mounted side by side on the same mounting surface (upper surface) of the mounting circuit portion 26b.
Further, when the press contact terminal 28 is assembled to the mounting circuit portion 26b, the housing fixing portion 28a of the press contact terminal 28 passes through the opening 32 of the mounting circuit portion 26b, and the front end side of the housing fixing portion 28a is on the bottom wall 23a side of the unit housing 23. Protrusively.

  The distal end side of the housing fixing portion 28a that protrudes from the mounting circuit portion 26b toward the bottom wall 23a is housed and held in a terminal engaging recess 34 (see FIG. 3) formed in the bottom wall 23a, and is fixed to the unit housing 23. The

  The terminal engaging recess 34 has a depth (plate thickness of the bottom wall 23a) so that the tip of the housing fixing portion 28a to be inserted is not exposed to the opposite side of the bottom wall 23a.

  In the in-vehicle indoor lighting unit 21 of the embodiment described above, the mounting space for the switch circuit 5 and the mounting space for the press contact terminal 28 share a single mounting space 23c. Compared with the conventional vehicle interior lighting unit provided on both sides of the bottom wall of the unit housing, the height dimension h (see FIG. 2) of the unit housing 23 that accommodates the switch circuit 5 and the press contact terminal 28 can be reduced. it can.

  Therefore, it is easy to install in a small installation space without protruding to the passenger compartment side, for example, the design of the interior lighting of the vehicle interior is almost flush with the surface of the ceiling wall. Thus, the degree of freedom in designing the interior lighting of the vehicle can be improved.

  In addition, since the press contact terminal 28 is made of a metal plate, it has excellent heat conductivity, and the press contact terminal 28 is mounted so that the press contact terminal 28 is directly stacked on the mounting circuit portion 26b of the flexible printed circuit body 26. The printed circuit 25a, 25b,... Of the circuit part 26b effectively functions as a heat radiating part that radiates heat to the outside. Even when the electronic component 6 is mounted, the heat generated by the electronic component 6 can be easily dissipated, and the temperature rise of the unit can be suppressed.

  Further, in the in-vehicle indoor lighting unit 21 of the above embodiment, the press contact terminal 28 is provided with a housing fixing portion 28 a that penetrates the flexible printed circuit body 26 and is fixed to the unit housing 23. Therefore, the press contact terminal 28 can be reliably fixed to the unit housing 23 without causing an increase in the number of parts due to the addition of a dedicated part for fixing.

  Further, in the vehicle interior lighting unit 21 of the above embodiment, the housing fixing portion 28 a of the press contact terminal 28 that penetrates the flexible printed circuit body 26 and is fixed to the unit housing 23 is formed on the bottom wall 23 a of the unit housing 23. It is accommodated and held in the terminal engaging recess 34 and does not protrude outside. Therefore, it is possible to prevent the housing fixing portion 28a of the press contact terminal 28 from coming into contact with an external conductor and causing an accident such as a short circuit.

  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.

4 LED (light source)
5 Switch circuit 6 Electronic component (resistance element)
DESCRIPTION OF SYMBOLS 11 Electric wire 21 Car interior lighting unit 23 Unit housing 23a Bottom wall 23c Mounting space 25a, 25b, 25c Printed circuit 26 Flexible printed circuit body 26a Light source connection part 26b Mounting circuit part 26c 26c
29 Terminal mounting area 30a, 30b Element soldering portion 32 Opening 34 Terminal engaging recess

Claims (3)

A unit housing in which a mounting space is formed;
A flexible printed circuit body having a light source connecting portion to which a light source is connected and a mounting circuit portion laid in the mounting space, wherein the light source connecting portion and the mounting circuit portion are electrically connected by a printed circuit;
A switch circuit connected to the printed circuit of the mounting circuit unit to control the operation of the light source;
A pressure contact terminal made of a metal plate, which is mounted on the unit housing, comprising a circuit body connection terminal portion connected to the printed circuit of the mounting circuit portion and a pressure contact blade for press-connecting an electric wire;
With
The vehicle interior lighting unit, wherein the press contact terminal and the switch circuit are mounted side by side on the same mounting surface of the mounting circuit unit.   The in-vehicle indoor lighting unit according to claim 1, wherein a housing fixing portion that passes through the flexible printed circuit body and is fixed to the unit housing is provided in the press contact terminal.   The in-vehicle indoor lighting unit according to claim 2, wherein the housing fixing portion is housed and held in a terminal engaging recess formed in a bottom wall of the unit housing forming the mounting space.

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