JP2010097869A - Switch structure of lamp unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a switch structure of a lamp unit, which can improve assembly workability by reducing the number of switch structural components and simplifying the structure. <P>SOLUTION: A contact 32 contacting between bus bars 21 composing a switch circuit is arranged inside a slider 31, and a ball biasing part 32b arranged on the contact 32 is made to bias a portion of a ball 33 to a coupling recessed part 28a of a guide part 28. Since the ball biasing part 28b for biasing the ball 33 is integrally arranged with the contact 32 in this way, a spring hitherto arranged separately is dispensed with, and the number of components can be reduced to simplify the structure. Accordingly, cost reduction is achieved and assembly workability can be improved. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a switch structure of a lamp unit, for example, a switch structure of a lamp unit such as a room lamp attached to a lamp mounting window of an interior wall material such as a roof trim.

  Conventionally, a lamp unit such as a room lamp or a courtesy lamp is generally attached to an interior wall material such as a roof trim or a door trim that covers a vehicle body panel (see, for example, Patent Document 1).

  As shown in FIG. 6, the room lamp 100 described in Patent Document 1 is a lamp unit that is mounted on a lamp mounting window 102 that is opened in a roof trim 101 as an interior wall material that covers a vehicle body panel (not shown).

  The room lamp 10 includes a lamp function portion A attached to the vehicle body panel side (upper side in FIG. 6) of the roof trim 101, and a cover lens 103 attached to the indoor side (lower side in FIG. 6) of the roof trim 101. And a design portion B. The lamp function part A includes an insulating housing 105 in which a switch component 110 is provided together with a bus bar 104 constituting a switch circuit body, a bulb (bulb) 106 mounted between the bulb contacts 104a and 104a of the bus bar 104, a reflector 107, Have

  As shown in FIG. 7, the switch housing portion 107 that can house the switch component 110 of the room lamp 100 and the FFC (not shown) that is a power line are positioned on the indoor side surface (upper surface in FIG. 7) of the insulating housing 105. It has the electric wire accommodating part 108 which accommodates possible, and the valve | bulb accommodating part 109 which accommodates the valve | bulb 106. FIG.

  The switch component 110 is for intermittently operating a switch circuit capable of switching the operation state (ON / OFF and door interlocking) of the valve 106, and includes a slider 111 in which a switch lever 111a is integrated, a contact 112, It consists of a ball 113 and a spring 114. The slider 111 is slidably supported between the insulating housing 105 and the lid 115 (see FIG. 6).

The contact 112, the spring 114, and the ball 113 are accommodated in the slider 111 so as to be movable up and down in the drawing. The contact 112 is biased upward to come into contact with the bus bar 104 located above, and the switch is switched by moving the contact 112. Further, the ball 113 is urged downward so that a part of the ball 113 is exposed from the slider 111 and is partially fitted into a fitting recess (not shown) provided in the insulating housing 105, thereby moving the slider 111 to a predetermined position. To ensure the feeling of switch operation.
JP 2002-234388 A (FIGS. 1 and 2)

  However, the room lamp 100 described in Patent Document 1 described above includes the slider 111, the contact 112, the ball 113, the spring 114, and the like as the switch component 110, and has a large number of components and a structure. Since it becomes complicated, there was an inconvenience that assembly workability was poor.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a lamp unit switch structure capable of simplifying the structure by reducing the number of switch components and improving assembly workability. There is to do.

In order to achieve the object described above, the switch structure of the lamp unit according to the present invention is characterized by the following (1) to (3).
(1) A switch structure of a lamp unit that is attached to a lamp mounting window provided on an interior wall covering a vehicle body panel, and constitutes a switch circuit that connects between a bulb contact that supplies power to the bulb and a power line. A plurality of bus bars, contacts that are brought into contact with each other between the bus bars, a slider that accommodates and moves the contacts, and a fitting recess provided in a guide portion that slidably supports the slider. A ball for positioning the slider at a predetermined position by fitting a part thereof, and a ball urging portion for urging the ball against the fitting recess in the contact.
(2) The switch structure of the lamp unit configured as described in (1) above,
The contact is formed in a rectangular shape as a whole, and one surface is used as a conducting portion for conducting electricity between the bus bars, and the surface facing the one surface is used as the ball biasing portion.
(3) The switch structure of the lamp unit configured as described in (1) or (2) above,
A concave portion into which a part of the ball is fitted is provided in the ball biasing portion.

In the switch structure of the lamp unit configured as described in (1) above, the contact that contacts between the bus bars that constitute the switch circuit is provided inside the slider, and the ball urging portion provided on the contact has a part of the ball. The fitting portion of the guide portion is biased. Thus, by providing the ball urging portion for urging the ball integrally with the contact, it is not necessary to provide a separately provided spring, so that the number of parts can be reduced and the structure can be simplified. it can. Thereby, cost reduction and assembly workability can be improved.
In the switch structure of the lamp unit configured as described in (2) above, since the ball urging portion is provided on the surface of the contact formed in a generally rectangular shape so as to face the conduction portion that conducts between the bus bars, the ball is guided to the guide portion. The conductive portion is biased toward the bus bar by the reaction. As a result, the switch feeling can be ensured and the contact can be reliably brought into contact with the bus bar.
In the lamp unit switch structure having the configuration (3), since the concave portion into which a part of the ball is fitted is provided in the ball urging portion, it is possible to prevent the ball from falling off.

  According to the switch structure of the lamp unit of the present invention, the ball urging portion for urging the ball is provided integrally with the contact, so that it is not necessary to provide a separately provided spring, so the number of parts is reduced. The structure can be simplified. As a result, the cost can be reduced and the assembly workability can be improved.

Hereinafter, a switch structure of a lamp unit according to an embodiment of the present invention will be described with reference to the drawings.
1 is an exploded perspective view of a lamp unit according to the present invention, FIG. 2 is a perspective view of an insulating housing, FIG. 3 is an exploded perspective view of a switch component, and FIGS. 4A to 4C are switches in each operating state of a bulb. FIGS. 5A to 5C are cross-sectional views showing a ball and a contact when moving to an adjacent operation state. FIGS.

  As shown in FIG. 1, a room lamp 10 as a lamp unit according to an embodiment of the present invention is mounted on a lamp mounting window 11a opened in a roof trim 11 as an interior wall material covering a vehicle body panel (not shown). It is. The room lamp 10 includes a lamp function portion A attached to the vehicle body panel side (lower side in FIG. 1) of the roof trim 11 and a design portion B attached to the indoor side of the roof trim 11.

  The design portion B has a cover lens 40, and as shown in FIG. 1, the lamp functional portion A that is attached to the lamp mounting window 11a in advance is crowned from the indoor side (upper side in the drawing) of the roof trim 11. To be attached. A switch knob 41 is slidably fitted in the cover lens 40 in advance, and the switch is switched by sliding the switch knob 41.

  The design portion A includes an insulating housing 22 that houses a plurality of bus bars 21, switch parts 30, valves 23, etc., a valve 23 that is mounted between the valve contacts 21 a and 21 a of the bus bar 21, and a reflector 24. . The bus bar 21 connects a valve contact 21a, 21a that supplies power to the valve 23 and an FFC (flexible flat cable) 25 that is a power line to form a switch circuit. The reflector 24 reflects the light from the bulb 23 to the indoor side.

  As shown in FIG. 2, on the indoor side surface (upper surface in FIG. 2) of the insulating housing 22, the switch housing portion 24 that can house the switch part 30 of the lamp unit and the vehicle body panel side of the roof trim 11 are routed. Thus, an electric wire housing portion 26 capable of positioning the FFC 25 electrically connected to the room lamp 10 and a bulb housing portion 27 are provided. The bus bar 21 is connected to the FFC 25 housed in the wire housing portion 26 by a press contact terminal (not shown).

  The switch component 30 is for intermittently operating a switch circuit capable of switching the operation state (ON / OFF and door interlocking) of the valve 23. As shown in FIG. 3, the switch lever 31a is an integrated slider. 31, contacts 32, balls 33, and the like. The switch lever 31a is fitted to the lower surface side of the handle 42 (see FIG. 1) of the switch knob 41 when the cover lens 40 described above is attached, and moves together with the handle 42.

  The slider 31 has a rectangular shape as a whole, and has a contact accommodating portion 31b that opens upward. A bottom surface 31c of the slider 31 is provided at an intermediate position in the height direction of the slider 31. The bottom surface 31c is provided with a through hole 31d for allowing a part of the ball 33 to protrude downward. A guide receiver 31e that slidably supports the slider 31 is formed across the guide portion 28 (see FIGS. 4 and 5) provided on the insulating housing 22 below the bottom surface 31c.

  The contact 32 switches the operating state of the valve 23 by bringing it into contact with a predetermined bus bar 21 and conducting it. The contact 32 is formed, for example, by bending a thin thin plate into a rectangular shape as a whole, and using one surface (upper surface in FIG. 3) 32a as a conductive portion (32a) for conducting between the bus bars 21, the one surface 32a. A surface 32b facing the ball is a ball urging portion (32b). The ball urging portion 32b is provided with a partial spherical concave portion 32c for fitting a part with the ball 33, and here, a cut 32d is provided at the center position of the concave portion 32c. The ball urging portion 32b is formed in a leaf spring shape.

  Accordingly, the ball 33 is fitted into the through hole 31 d of the bottom surface 31 c of the slider 31, and the contact 32 is placed on the ball 33. After the assembly, the conducting portion 32a of the contact 32 is pressed from the upper side in FIG. 3 by the bus bar 21 and the insulating housing 22, so that the ball 33 is urged downward by the ball urging portion 32b and fitted into the through hole 31d. A part of the slider 31 protrudes downward from the bottom surface 31c.

  Thus, when the switch knob 41 of the cover lens 40 is moved, the slider 31 is moved via the switch lever 31a. At this time, the ball 33 moves along the guide portion 28, and the slider 31 is positioned by partially fitting in the fitting recess 28 a provided in the guide portion 28 as will be described later. At this time, an appropriate switch feeling can be obtained by fitting the ball 33 into the fitting recess 28a (see FIGS. 4 and 5).

Next, the operation of the switch will be described.
4A is a plan view showing the case where the switch is in the “DOOR state” and a cross-sectional view at the position IV-IV in FIG. 2, and FIG. 4B is a plan view and a cross-sectional view in the same “OFF state”. 4 (C) is a plan view and a cross-sectional view of the “ON state”, FIG. 5 (A) is a cross-sectional view showing the position of the ball in the “DOOR state”, and FIG. 5 (B) is a cross-sectional view showing the state in the middle of movement. FIG. 5C is a cross-sectional view of the “OFF state”.

  The “DOOR state” shown in FIGS. 4A and 5A is an operating state in which the valve 23 is lit when the door of the vehicle body is opened. In this “DOOR state”, the slider 31 is located on the leftmost side in the drawing, and the ball 33 is fitted in the leftmost fitting recess 28 a in the guide portion 28.

  When the switch knob 41 of the cover lens 40 is moved to move the slider 31 to the right in the figure, as shown in FIG. 5 (B), the ball partially fitted in the fitting recess 28a of the guide portion 28. 33 rolls out from the fitting recess 28a and moves to the projection 28b. At this time, the leaf spring-shaped ball urging portion 32b is elastically deformed upward. Since the ball urging portion 32b is cut at the center, it is easily deformed upward.

  When the switch knob 41 is further moved to move the slider 31 to the right in the figure, the ball 33 is fitted into the next fitting recess 28a as shown in FIGS. 4 (B) and 5 (C). Thus, the “OFF state” is set. When the ball 33 is fitted from the convex portion 28b into the fitting concave portion 28a, the ball 33 is urged downward by the ball urging portion 32b of the contact 32. With this switch feeling, the contact 32 is positioned at a predetermined position.

  When the switch knob 41 is further moved and the slider 31 is moved in the right direction in the figure, the ball 33 gets over the convex portion 28b as shown in FIG. To be in the “OFF state”.

  As described above, according to the switch structure of the lamp unit according to the present embodiment described above, the ball urging portion 32b is provided in the contact 32 provided between the bus bars 21 provided in the slider 31 and constituting the switch circuit. A part of this is biased to the fitting recess 28 a of the guide portion 28. Thus, by providing the ball urging portion 32b for urging the ball 33 integrally with the contact 32, there is no need to provide a spring that has been conventionally provided, so the number of parts is reduced and the structure is simplified. can do. Thereby, cost reduction and assembly workability can be improved.

  In addition, since the ball urging portion 32b is provided on the surface of the contact 32 formed in a generally rectangular shape so as to face the conduction portion 32a that conducts between the bus bars 21, the ball 33 is urged toward the guide portion 28. By the reaction, the conduction part 32a is urged toward the bus bar 21 side. Thereby, the switch 32 can be ensured and the contact 32 can be reliably brought into contact with the bus bar 21.

  Furthermore, since the concave portion 32c into which a part of the ball 33 is fitted is provided in the ball urging portion 32b, the ball 33 can be prevented from falling off when the slider 31 is moved along the guide portion 28. .

The switch structure of the lamp unit of the present invention is not limited to the above-described embodiment, and appropriate modifications and improvements can be made.
For example, in the above-described embodiment, the operation state of the valve 23 is “DOOR state”, “OFF state”, and “ON state” in order, but the order is not limited to this. Also, other states can be provided as the operating state of the valve 23.

It is a disassembled perspective view of the lamp unit concerning this invention. It is a perspective view of an insulation housing. It is a disassembled perspective view of switch components. (A)-(C) are the top views and sectional drawings which show the position of the switch components in each operation state of a valve. (A)-(C) are sectional drawings which show the ball | bowl and contact at the time of moving to the next operating state. It is a disassembled perspective view of the conventional lamp unit. It is a disassembled perspective view of the conventional insulation housing and switch components.

Explanation of symbols

10 Room lamp (lamp unit)
11 Roof trim (interior wall material)
11a Lamp mounting window 21 Bus bar 21a Valve contact 23 Valve 25 FFC (power line)
28 Guide part 28a Fitting recessed part 30 Switch part (switch structure)
31 Slider 32 Contact 32a Conducting portion 32b Ball biasing portion 32c Recessed portion 33 Ball

Claims (3)

A switch structure of a lamp unit attached to a lamp mounting window provided on an interior wall covering a vehicle body panel,
A plurality of bus bars constituting a switch circuit for connecting between a valve contact and a power line for supplying power to the valve;
A contact that makes contact between the predetermined busbars and conducts;
A slider for accommodating and moving the contact;
A ball that positions the slider at a predetermined position by fitting a part thereof in a fitting recess provided in a guide portion that slidably supports the slider;
A switch structure of a lamp unit, wherein the contact is provided with a ball urging portion that urges the ball toward the fitting recess.   2. The contact according to claim 1, wherein the entire contact is formed in a rectangular shape, and one surface is a conduction portion for conducting electricity between the bus bars, and a surface opposite to the one surface is the ball biasing portion. The switch structure of the described lamp unit.   3. The lamp unit switch structure according to claim 1, wherein a concave portion into which a part of the ball is fitted is provided in the ball urging portion.

Images