JP2011210521A - Switch member and on-vehicle room lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switch member which can prevent plastic deformation of a contact, and provide an on-vehicle room lighting system including such the switch member.SOLUTION: The contact 36 includes a knob engagement part 42, a first leg-like contact part 43, a second leg-like contact part 44, and a fixed end part 45. The first leg-like contact part 43 and the second leg-like contact part 44 are formed so as to be parts contacting with either of bus bars A, B, C, and to have flexibility in a same shape together. The first leg-like contact part 43 includes a first base end 47, a first medium 48, and a first tip end 49, and is formed to be folded in an approximately V-shape. The second leg-like contact part 44 includes a second base end 51, a second medium 52, and a second tip end 53. The first tip end 49 of the first leg-like contact part 43, and the second tip end 53 of the second leg-like contact part 44 are connected and fixed by the fixed end part 45.

Description

  The present invention relates to a switch member and a vehicle-mounted indoor lighting device including the switch member.

  Patent Document 1 below discloses an example of a vehicle interior lighting device. This will be briefly described with reference to FIG. In FIG. 16, an in-vehicle interior lighting device 1 in Patent Document 1 below is a room lamp disposed on a ceiling and has a lamp body 2. The lamp body 2 is formed with two partition walls 3 and 3 and is divided into three. Lenses 4, 5, and 5 are provided above these so as to correspond to the respective sections. By providing the lenses 4, 5, 5, lamp chambers 6, 7, 7 are formed below this. A switch member 8 is provided in the lamp chamber 6 so as to be continuous with the part.

  The switch member 8 has a slide type switch knob 9. The switch knob 9 is formed with a base 10, a protrusion 11, and an action portion 12. The switch member 8 is assembled to the lamp body 2 in the downward arrow direction in the figure before the lens 4 is assembled.

  The lamp body 2 is provided with a plurality of circuit bodies 13 to 16 having contacts 13a to 16a. Each of the contacts 13a to 16a is formed so as to protrude in the upward arrow direction in the figure. The contact 13a or 14a is pressed by the pressing portion 12a of the action portion 12 to come into contact with the contact 15a or 16a as the switch member 8 moves in the leftward arrow direction in the drawing or in the rightward arrow direction. It has become. And two of the corresponding circuit bodies 13-16 will be in a conduction | electrical_connection state by this contact. When the conduction state is formed, for example, a bulb (not shown) in the lamp chamber 6 emits light.

JP 2004-17931 A

  By the way, in the said prior art, each contact 13a-16a is formed so that a front-end | tip may become a free end part while protruding upwards in the figure. On the other hand, the switch member 8 is formed so as to be assembled downward in the drawing. Therefore, when the switch member 8 is assembled, it is necessary to work with an aim so as not to interfere with the free ends of the contacts 13a to 16a. For this reason, there exists a possibility of affecting workability | operativity. Further, if the switch member 8 is misaligned when the switch member 8 is assembled, the switch member 8 interferes with the free end, and plastic deformation occurs when an excessive force is applied. There is a risk of causing this.

  Although not limited to the above prior art, it can be said that plastic deformation is likely to occur when the contact tip is a free end.

  This invention is made | formed in view of an above-described situation, and makes it a subject to provide the switch member which can prevent the plastic deformation of a contact. It is another object of the present invention to provide an in-vehicle indoor lighting device including such a switch member.

  In order to solve the above-mentioned problems, the switch member of the present invention according to claim 1 is for energizing a switch knob for performing a predetermined operation and two circuit bodies corresponding to the operation of the switch knob. The contact includes: a knob engaging portion that engages with the switch knob; and one of the two circuit bodies corresponding to the operation of the switch knob; A flexible first leg-shaped contact portion that is continuous with the knob engaging portion, and a flexible second contact portion that is in contact with the other of the two circuit bodies and has a second base end that is continuous with the knob engaging portion. It has a leg-shaped contact portion, and a fixed end portion for connecting and fixing the first tip of the first leg-shaped contact portion and the second tip of the second leg-shaped contact portion.

  According to the present invention having such characteristics, the first tip of the first leg-shaped contact portion and the second tip of the second leg-shaped contact portion are connected and fixed to become a fixed end portion. That is, the contact is formed such that the tip does not become a free end. Even when the contact is displaced and interference occurs during assembly, the first leg-like contact part and the second leg-like contact part are flexible and connected and fixed by the fixed end. It works to correct the deviation. When the interference is resolved, the contact returns to the original state.

  The switch member according to a second aspect of the present invention is the switch member according to the first aspect, wherein the contact is a first middle of the first leg-shaped contact portion and a second middle of the second leg-shaped contact portion. It is formed in the substantially O-leg shape which leaves | separates.

  According to the present invention having such a feature, by making the shape of the contact a substantially O-leg shape, the direction intersecting the assembling direction of the switch member, specifically, the first intermediate and the second intermediate are arranged. The force at the time of interference can flow in the direction of tying. An excessive force is not applied to the contact, and the force can be applied, so that the correction of the positional deviation can be accelerated. In other words, it is possible to accelerate the cancellation of interference. According to the present invention, even if the contact is displaced and interference occurs, the assembly can be performed smoothly.

  In order to solve the above-mentioned problem, the in-vehicle indoor lighting device according to claim 3 of the present invention is a plurality of circuit bodies in which the switch member according to claim 1 or 2 and the contacts of the switch member are in contact with each other. And a valve that is turned on / off by operation of a switch knob of the switch member.

  According to the present invention having such a feature, an in-vehicle indoor lighting device in which the contacts reliably come into contact with the two circuit bodies corresponding to the operation of the switch knob.

  According to the first aspect of the present invention, there is an effect that plastic deformation of the contact during assembly can be prevented. As a result, the defect rate can be reduced. Further, according to the present invention, it is not necessary to aim at the time of assembling and work can be improved, so that the workability can be improved. Furthermore, according to the present invention, since the contact has a fixed end, it is possible to prevent the first leg-shaped contact portion from opening at the first tip position and the second leg-shaped contact portion at the second tip position. it can. As a result, there is also an effect that deformation in a single state can be made difficult to occur as compared with a contact that has only a free end without a fixed end.

  According to the second aspect of the present invention, there is an effect that a better form of the switch member can be provided.

  According to the third aspect of the present invention, there is an effect that it is possible to provide an in-vehicle indoor lighting device that can particularly improve the reliability of the switch member.

It is a perspective view which shows the vehicle interior lighting device of this invention. (A) is a disassembled perspective view of the vehicle-mounted indoor lighting device, and (b) is an enlarged perspective view of the contact of (a). It is a perspective view of a switch member. It is a front view of a switch member. (A) is a developed view of the contact, (b) is a perspective view of the contact after bending, and (c) is an exploded perspective view of the switch member. It is explanatory drawing which concerns on the assembly | attachment of a switch member. (A) is explanatory drawing of the state in which there was gap and interference occurred in the contact in the middle of assembly, and (b) is the explanatory view of the state where gap was corrected. (A) is explanatory drawing which shows the state of a switch member and a bus bar in case a switch is ON, (b) is a circuit diagram in case a switch is ON. It is a top view which shows the state of a switch member and a bus bar in case a switch is ON. It is a perspective view which shows the state of a switch member and a bus bar in case a switch is ON. (A) is explanatory drawing which shows the state of a switch member and a bus bar in case a switch is DOOR, (b) is a circuit diagram in case a switch is DOOR. It is a top view which shows the state of the switch member and bus bar in case a switch is DOOR. It is a perspective view which shows the state of a switch member and a bus bar in case a switch is DOOR. It is a figure for comparing with this invention, and is explanatory drawing which concerns on the assembly | attachment of the switch member for a comparison. It is a figure for comparing with this invention, and is an explanatory view in the state where there was a gap and interference and a deformation occurred in the contact of the switch member for comparison in the middle of assembly. It is sectional drawing of the vehicle interior lighting apparatus of a prior art example.

  The vehicle interior lighting device includes a switch member for bringing the circuit body into an energized state, and the switch member is formed in a substantially O-leg shape in which the contact has a fixed end.

  Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is a perspective view showing an in-vehicle indoor lighting device of the present invention. 2A is an exploded perspective view of the vehicle interior lighting device, FIG. 2B is an enlarged perspective view of the contact of FIG. 2A, FIGS. 3 to 5 are diagrams of the switch member, and FIGS. Is a diagram relating to the assembly of the switch member, FIGS. 8 to 10 are diagrams relating to the case where the switch is ON, and FIGS. 11 to 13 are diagrams relating to the case where the switch is DOOR. Furthermore, FIG.14 and FIG.15 is a figure for comparing with this invention.

  In FIG. 1, reference numeral 21 denotes an in-vehicle indoor lighting device. The in-vehicle interior lighting device 21 is provided as one configuration of a roof module installed on a ceiling in a room having a driver's seat or the like in an automobile. The in-vehicle interior lighting device 21 can be divided into functional parts, and a design part assembled on the indoor side of a roof trim (interior wall material) provided as one configuration of the roof module and a function assembled on the outdoor side of the design part. Part. On the other hand, the in-vehicle indoor lighting device 21 is divided into constituent members, which are a cover lens 22, a housing 23, a plurality of bulbs 24, a plurality of switch members 25, and a plurality of bus bars A, B, C as circuit bodies. ... and is configured. First, each component will be described.

  In FIG. 2, a cover lens 22 is a resin member located on the indoor side, and is formed so that the whole or a predetermined portion is transparent. The cover lens 22 includes a lens-side fitting portion 26 that is fitted to the housing 23, a lens 27 that transmits and spreads light from the bulb 24, and a switch opening 28 that enables a switch operation of the switch member 25. And have.

  The housing 23 is a resin member that is assembled to the outside of the cover lens 22 and has a plurality of locking portions 29 for the roof trim. The housing 23 includes a housing side fitting portion 30 into which the cover lens 22 is fitted, a plurality of valve accommodating portions 31 that accommodate the valve 24, a plurality of switch accommodating portions 32 that accommodate the switch member 25, and a bus bar A. , B, C... And a large number of bus bar fixing portions 33.

  Here, a known valve 24 is used. When the valve 24 is accommodated in the valve accommodating portion 31, it electrically contacts the valve contact 34 of the corresponding bus bar.

  2 to 5, a switch member 25 is a member according to the present invention, and a switch knob 35 for performing a predetermined switch operation, and two bus bars A and B corresponding to the switch operation of the switch knob 35. Or a contact 36 for bringing the bus bars A and C into an energized state. The switch member 25 in the present embodiment employs a seesaw type structure, but the present invention is not limited to this, and a slide type structure or the like may be employed.

  The switch knob 35 is formed by resin molding, and includes an operation portion 37 and a base portion 38 that is coupled to a central position on the back side of the operation portion 37. The switch knob 35 is formed in a shape that is substantially T-shaped when viewed from the front.

  In the present embodiment, the operation unit 37 is formed as a portion for performing a switching operation to either the switch ON state or the switch DOOR state (described later). The base portion 38 is formed to have a pair of columnar portions 39 and a pair of fulcrum portions 40 disposed between the pair of columnar portions 39. Contact engagement grooves 41 for engaging the contacts 36 are respectively formed in the pair of columnar portions 39. The contact engaging groove 41 is formed by cutting out straight from the tip of each columnar portion 39 toward the operation portion 37. The opposite direction of the pair of fulcrum portions 40 is set to be orthogonal to the opposite direction of the pair of columnar portions 39. A shaft portion (not shown) of the switch housing portion 32 is engaged with the pair of fulcrum portions 40.

  The contact 36 is formed by pressing a conductive metal thin plate, and includes a knob engaging portion 42, a first leg-shaped contact portion 43, a second leg-shaped contact portion 44, and a fixed end 45. And have. The knob engaging portion 42 is formed in a plate shape that is inserted into and engaged with the contact engaging groove 41 of the switch knob 35. The knob engaging portion 42 is formed with a locking portion 46 for preventing the removal. The locking portion 46 is formed in a substantially triangular claw shape by cutting and raising.

  The first leg-shaped contact portion 43 and the second leg-shaped contact portion 44 are formed as portions that contact any of the bus bars A, B, and C. The first leg-shaped contact portion 43 and the second leg-shaped contact portion 44 are both formed to have the same shape and flexibility (elasticity). The first leg-shaped contact portion 43 and the second leg-shaped contact portion 44 are formed by bending a band-shaped developed shape portion 55, 56 described later (bending processing will be described later). The first leg-shaped contact portion 43 and the second leg-shaped contact portion 44 are arranged side by side.

  The first leg-shaped contact portion 43 has a first base end 47, a first intermediate 48, and a first front end 49, and is bent and formed into a substantially square shape. The first base end 47 is coupled to the knob engaging portion 42. The first intermediate 48 has a contact 50 that extends on both sides of the substantially bent portion. The contact 50 is formed in a substantially box shape that is concave when viewed from one side and convex when viewed from the other side. The box side surface is formed to be tapered. The contact 50 is a part that contacts any one of the bus bars A, B, and C. The first tip 49 is formed so as not to be a free end. Specifically, it is coupled to the fixed end 45. The fixed end portion 45 is formed in a plate shape like the knob engaging portion 42.

  The second leg-shaped contact portion 44 has the same shape as the first leg-shaped contact portion 43 as described above, and is different only in the direction of bending so as to be substantially square-shaped. The second leg-shaped contact portion 44 has a second base end 51, a second intermediate 52 and a second tip 53. The second base end 51 is coupled to the knob engaging portion 42. The second intermediate 52 is formed with the same contact 50 as the first leg-like contact portion 43. The second tip 53 is formed so as not to be a free end. Specifically, it is coupled to the fixed end 45.

  The first tip 49 of the first leg-shaped contact portion 43 and the second tip 53 of the second leg-shaped contact portion 44 are connected and fixed by a fixed end 45. The first tip 49 and the second tip 53 are restricted from being opened in the direction of the arrow by being connected and fixed by the fixed end 45 (see FIG. 5B).

  The contact 36 is formed in a substantially O-leg shape (or a substantially rhombus pantograph shape) such that the first intermediate 48 of the first leg-shaped contact portion 43 and the second intermediate 52 of the second leg-shaped contact portion 44 are separated from each other. .

  Here, the formation of the contact 36 will be described with reference to FIG. First, the contact 36 is formed by punching the metal thin plate to form a contact developed shape 54. The contact developed shape 54 includes a knob engaging portion 42, strip-shaped developed shape portions 55 and 56, and a fixed end 45 (see FIG. 5A). Next, the belt-shaped developed shape portions 55 and 56 are bent to be bent into a substantially square shape, and the contact 50 is formed by a press. When the bending process or the like is completed, the first leg-shaped contact portion 43 and the second leg-shaped contact portion 44 are formed (see FIG. 5B).

  Such a contact 36 is press-fitted by a predetermined amount into the contact engaging groove 41 in the pair of columnar portions 39 of the switch knob 35 from the knob engaging portion 42 side as shown in FIG. 5C, and the press-fitting is completed. Thus, the switch member 25 as shown in FIGS. 3 and 4 is formed. The contact 36 does not fall off because the engaging portion 46 of the knob engaging portion 42 is caught in the contact engaging groove 41.

  In FIG. 2, the plurality of bus bars A, B, C... Are formed by punching a metal plate having conductivity. The plurality of bus bars A, B, C... Are formed to have a desired path. At predetermined positions of the bus bars A, B, and C, a contact recess 57 (see FIGS. 9 and 12) with which the contact 50 of the contact 36 comes into electrical contact is formed. The bus bars A and B or the bus bars A and C are electrically connected via the contact 36 that contacts the contact recess 57. The contact recess 57 is formed in such a shape that one side portion of the bus bar body is cut out in a triangular shape (see FIGS. 9 and 12).

  Next, the assembly of the switch member 25 will be described based on the above configuration and structure.

  In FIG. 6, the switch member 25 is assembled in such a manner that the indoor side of the housing 23 is turned up and the switch member 25 is lowered straight from above. When this assembly is completed, the switch member 25 is housed in the switch housing portion 32 so as to be swingable.

  In FIG. 7, when the switch member 25 is displaced to the left in FIG. 7 with respect to the normal assembly position (see FIG. 6), if the operation of lowering the switch member 25 straight is continued, the contact 36 opens the switch housing portion 32. It will interfere with the edge. However, since the contact 36 has the structure described above, an impact at the time of interference with the switch housing portion 32 flows laterally, and as a result, the positional deviation is corrected as shown in FIG. It becomes like this. Even if the switch member 25 is misaligned, the switch member 25 can be assembled smoothly.

  Subsequently, the switch operation by the switch member 25 will be described.

  In FIG. 8A, the switch member 25 is operated so as to be in the switch ON state. At this time, a circuit as shown in FIG. 8B is formed. More specifically, as shown in FIGS. 9 and 10, the contact 50 in the first leg-like contact portion 43 of the contact 36 contacts the contact recess 57 (the contact recess 57 on the right side in the figure) of the bus bar A. The contact 50 of the second leg-shaped contact portion 44 comes into contact with the contact recess 57 of the bus bar B, so that the bus bars A and B become conductive. When the switch member 25 is operated in the switch ON state, a current flows in the order of bus bar A → contact 36 → bus bar B.

  In FIG. 11A, the switch member 25 is operated so as to be in the switch DOOR state. At this time, a circuit as shown in FIG. 11B is formed. More specifically, as shown in FIGS. 12 and 13, the contact 36 moves, and the contact 50 of the first leg-like contact portion 43 moves into the contact recess 57 of the bus bar A (the contact recess 57 on the left side in the figure). At the same time, the contact 50 of the second leg-shaped contact portion 44 comes into contact with the contact recess 57 of the bus bar C, so that the bus bars A and C become conductive. When the switch member 25 is operated to the switch DOOR state, a current flows in the order of bus bar A → contact 36 → bus bar C.

  By the way, the case where the switch member 101 as shown in FIG.14 and FIG.15 is provided is demonstrated below. The switch member 101 is for comparison with the switch member 25 described above.

  14 and 15, the switch member 101 includes a switch knob 35 and contacts 102 that engage with a pair of columnar portions 39 of the switch knob 35. The contact 102 has a knob engaging part, a first leg-like contact part 103, and a second leg-like contact part 104. The first leg-shaped contact portion 103 and the second leg-shaped contact portion 104 have the base ends coupled to the knob engaging portion, the tip ends as a free end portion 105, and the middle portions are further separated from each other. It is formed in an approximately eight-letter shape.

  With regard to the assembly of the switch member 101, it is necessary to aim at the work of lowering the switch housing portion 32 straightly as shown in FIG. 14, and in the event of a misalignment as shown in FIG. Then, the contact 102 interferes with the opening edge of the switch housing portion 32, and plastic deformation occurs. This problem is that the tips of the first leg-shaped contact portion 103 and the second leg-shaped contact portion 104 are free end portions 105, that is, the fixed end portion 45 (see FIGS. 6 and 7) does not exist, It can be said that the reason is that the shape of the contact 102 is not formed in the above-described substantially O-leg shape (or substantially diamond-shaped pantograph shape).

  As described above with reference to FIGS. 1 to 15, according to the present invention, there is an effect that the plastic deformation of the contact 36 during assembly can be prevented. As a result, the defect rate can be reduced. Further, according to the present invention, it is not necessary to aim at the time of assembling and work can be improved, so that the workability can be improved. Furthermore, according to the present invention, since the contact 36 has the fixed end 45, the position of the first tip 49 in the first leg-shaped contact portion 43 and the position of the second tip 53 in the second leg-shaped contact portion 44. Opening at can be prevented. As a result, there is an effect that deformation in a single state can be made difficult to occur compared to the contact 102 in which the fixed end portion 45 does not exist and only the free end portion 105 exists.

  According to the present invention, there is an effect that it is possible to provide the in-vehicle indoor lighting device 21 that can particularly improve the reliability of the switch member 25.

  It goes without saying that the present invention can be variously modified without departing from the spirit of the present invention.

A, B, C ... Busbar (circuit body)
DESCRIPTION OF SYMBOLS 21 ... Vehicle interior lighting device 22 ... Cover lens 23 ... Housing 24 ... Valve 25 ... Switch member 26 ... Lens side fitting part 27 ... Lens 28 ... Switch opening 29 ... Locking part 30 ... Housing side fitting part 31 ... Valve housing part 32 ... Switch housing part 33 ... Busbar fixing part 34 ... Valve contact 35 ... Switch knob 36 ... Contact 37 ... Operation part 38 ... Base part 39 ... Columnar part 40 ... Supporting part 41 ... Contact engagement groove 42 ... Knob Engagement part 43 ... first leg-like contact part 44 ... second leg-like contact part 45 ... fixed end part 46 ... locking part 47 ... first base end 48 ... first intermediate 49 ... first tip 50 ... contact 51 ... second base end 52 ... second intermediate 53 ... second tip 54 ... contact developed shape 55, 56 ... band-shaped developed shape portion 57 ... contact recess

Claims (3)

In a switch member comprising a switch knob for performing a predetermined operation, and a contact for energizing two circuit bodies corresponding to the operation of the switch knob,
The contact is
A knob engaging portion that engages with the switch knob;
A flexible first leg-shaped contact portion that contacts one of the two circuit bodies corresponding to the operation of the switch knob and has a first base end continuous to the knob engaging portion;
A flexible second leg-shaped contact portion that contacts the other of the two circuit bodies and has a second base end continuous to the knob engaging portion;
A switch member comprising: a first end of the first leg-shaped contact portion and a fixed end portion for connecting and fixing the second tip of the second leg-shaped contact portion. The switch member according to claim 1,
The contact member is formed in a substantially O-leg shape in which a first middle of the first leg-shaped contact portion and a second middle of the second leg-shaped contact portion are separated from each other. The switch member according to claim 1, comprising a plurality of circuit bodies in contact with contacts of the switch member, and a valve that is turned on / off by operation of a switch knob of the switch member. Car interior lighting device.

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