JP2013016330A - Vehicular lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lamp capable of installing a rubber cover extremely easily and securing sufficient sealing performance by the rubber cover.SOLUTION: The rubber cover 60 comprises: an outer periphery engaging section 60O having a first groove part 61 for inserting a tubular first projection part 24A installed in a housing 20 at the outer periphery; and an inner periphery engaging section 60I having a second groove part 67 for inserting a tubular second projection part 35 installed in a reflector 30 at the inner periphery. The outer periphery engaging section 60O is engaged with the first projection part 24 by pinching the first projection part 24 inserted into the first groove 61 with each side wall opposed to the first groove part 61. The inner periphery engaging section 60I is engaged with the second projection part 35 by pinching the tip of the second projection part 35 with a pressing member 50 fixed and installed on the reflector 30 in a climbing part 69 straddling over the tip of the second projection part 35 inserted into the second groove part 67.

Description

  The present invention relates to a vehicular lamp, and more particularly to a vehicular lamp in which a rubber cover is provided between a housing defining a lamp chamber and a light source bulb mounting portion of a reflector disposed in the lamp chamber.

  The vehicular lamp has a configuration in which a socket of the light source bulb is disposed at a light source bulb mounting portion of a reflector, and a harness from the socket must be pulled out from an opening formed in the housing.

  For this reason, a gap is formed between the light source bulb mounting portion of the reflector and the housing. Therefore, a ring-shaped rubber cover is arranged so as to cover the gap, thereby sealing the lamp chamber. Is to secure.

  In this case, the rubber cover is configured, for example, by forming an outer peripheral fitting portion on the outer peripheral portion and an inner peripheral fitting portion on the inner peripheral portion, and the outer peripheral fitting portion is a cylindrical shape implanted in the housing. The inner peripheral fitting portion is pressed against the outer peripheral side surface of the cylindrical second protruding portion implanted in the reflector by the elasticity of the rubber cover itself, and the like. The cap is screwed to the tip of the protrusion and is attached to the vehicular lamp so as to be prevented from being detached from the second protrusion (see Patent Document 1 below).

  Since the vehicular lamp provided with such a rubber cover always presses the outer peripheral side surface of the second projecting portion implanted in the reflector by the elasticity of the rubber cover itself, the rubber cover and the second projecting portion Adhesion at all times is achieved, and the structure can reliably block the ingress of moisture.

Japanese Patent Laid-Open No. 10-233102

  However, since the rubber cover shown in Patent Document 1 has an inner diameter smaller than the outer diameter of the second protrusion formed on the reflector, for example, the first protrusion formed on the housing with the outer periphery fitting part. When the inner peripheral fitting portion is fitted to the second protruding portion after being fitted to the portion, the inner circumference of the rubber cover is sequentially contracted to the outer peripheral side along the circumferential direction. The operation | work to contact | abut to an outer peripheral side surface will be needed.

  For this reason, there has been a problem that the above-described operation of the rubber cover becomes complicated. In this case, it is conceivable to further reduce the inner diameter of the rubber cover when improving the sealing performance against intrusion of moisture, etc., but the force required to shrink the inner periphery of the rubber cover to the outer peripheral side increases. It becomes inevitable that the work becomes more complicated.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a vehicular lamp that can attach a rubber cover very easily and can secure sufficient sealing performance by the rubber cover. It is in.

  In the present invention, by forming a groove portion through which the second protrusion portion of the reflector is inserted in the inner peripheral fitting portion of the rubber cover, a crossover portion straddling the second protrusion portion is formed, and this crossover portion is defined as the second protrusion portion. It is made to clamp between the front-end | tip of a protrusion part, and the pressing member attached to a reflector. By comprising in this way, the sealing performance of the inner peripheral fitting part of a rubber cover and a 2nd protrusion part can be ensured, and this groove part can be comprised so that a 2nd protrusion part can be penetrated in a comparatively loose state. it can. For this reason, it can be set as the structure which can be easily attached to the 2nd protrusion part of a rubber cover.

The present invention is grasped by the following composition.
(1) A vehicular lamp according to the present invention is a vehicular lamp provided with a ring-shaped rubber cover between a housing defining a lamp chamber and a light source bulb mounting portion of a reflector disposed in the lamp chamber. The rubber cover includes an outer peripheral fitting portion having a first groove portion through which a cylindrical first protrusion portion implanted in the housing is inserted in an outer peripheral portion, and a cylindrical shape in which an inner peripheral portion is implanted in the reflector. An inner periphery fitting portion having a second groove portion through which the second protrusion portion is inserted, and the outer periphery fitting portion opposes the first protrusion portion inserted through the first groove portion to the first groove portion. The first projecting portion is fitted by being sandwiched by each side wall surface, and the inner peripheral fitting portion is formed in the crossover portion across the tip of the second projecting portion inserted through the second groove portion. 2 Fixing and attaching to the tip of the protruding part and the reflector By clamping with holding members, characterized in that it is fitted to the second protruding portion.
(2) The vehicular lamp of the present invention is characterized in that, in the configuration of (1), the pressing member is a ring-shaped bulb cap for attaching the light source bulb to the reflector.
(3) The vehicular lamp according to the present invention is characterized in that, in the configuration of (1), the rubber cover includes a bellows portion between the outer peripheral fitting portion and the inner peripheral fitting portion.

  According to the vehicular lamp configured as described above, the rubber cover can be attached very easily, and sufficient sealing performance by the rubber cover can be secured.

It is sectional drawing which expanded and showed the state of the fitting to the housing and reflector of the rubber cover of the vehicle lamp by this invention. It is the block diagram which showed the vicinity of the light source bulb attachment part of the vehicle lamp by this invention, (a) is sectional drawing of a vehicle lamp, (b) is the rear view which looked at the vehicle lamp from the back side. It is sectional drawing in the III-III line of FIG.2 (b). It is sectional drawing which expanded and showed the rubber cover. It is a figure corresponding to Drawing 2 (b), and is a figure showing the state where a bulb cap, a rubber cover, and a light source bulb are not attached yet.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the accompanying drawings. Note that the same number is assigned to the same element throughout the description of the embodiment.
(Embodiment 1)
FIG. 2 is a configuration diagram showing the vicinity of the light source bulb mounting portion of the vehicular lamp according to the present invention. FIG. 2A is a cross-sectional view of the vehicular lamp. FIG. 2B is a rear view of the vehicular lamp viewed from the rear side (the light source bulb, socket, and connector shown in FIG. 2A are not shown). FIG. 2A is a cross-sectional view taken along line aa in FIG. In FIG. 2A (same as in FIG. 3), only the rubber cover 60 is hatched in order to avoid complicated drawing.

  As shown in FIG. 2A, the vehicular lamp 10 includes a housing 20 that defines a lamp chamber, and a reflector 30 is disposed inside the housing 20.

  The reflector 30 has, for example, a shape having a parabolic rotating surface, and the inner surface is configured as a reflecting surface 30A. The reflector 30 is arranged such that the front having the large diameter is, for example, the front side (left side in the drawing) of the vehicular lamp 10.

  A relatively small opening 31 is provided at the rear part of the reflector 30, and the light source bulb 40 can be disposed in the reflector 30 through the opening 31 from the rear of the reflector 30. That is, the opening 31 of the reflector 30 functions as a light source bulb mounting portion. The light source bulb 40 arranged in the reflector 30 is arranged at the focal point position of the reflector 30, whereby the light from the light source bulb 40 is reflected by the reflecting surface 30 </ b> A on the inner surface of the reflector 30. Later, the light is emitted to the front side (left side in the figure) of the vehicular lamp 10. A socket 41 is engaged with the light source bulb 40, and the socket 41 is attached to the reflector 30. That is, the socket 41 is provided with a flange portion 41 </ b> A extending in the circumferential direction, and this flange portion 41 </ b> A is formed between the tubular protrusion 32 and the valve cap 50 that are planted on the periphery of the opening 31 of the reflector 30. It is supposed to be arranged in. As shown in FIG. 3, which is a cross-sectional view taken along line III-III in FIG. 2B, the valve cap 50 is fixed by a screw 34 that is screwed into a screw screw base 33 that protrudes from the reflector 30. It is like that. Thereby, the socket 41 of the light source bulb 40 is fixed to the reflector 30. A harness (not shown) for supplying power to the light source bulb 40 is drawn out from the socket 41 via a connector 42 attached to the socket 41.

  The housing 20 is formed with an opening 21 through which the light source bulb mounting portion of the reflector 30 is exposed. Thereby, the harness connected to the connector 42 of the socket 41 can be pulled out of the housing 20. The opening 21 of the housing 20 is a circular opening substantially coaxial with the central axis of the light source bulb 40 (indicated by the dotted line O in FIG. 2A). A pair of projecting portions 24A and 24B constituting a groove portion 23 having an opening on the rear side (right side in the drawing) are implanted.

  Further, the reflector 30 has a cylindrical projecting portion 35 (sometimes referred to as a second projecting portion in this specification) 35 that is coaxial with the projecting portion 32 between the projecting portion 32 and the opening 31 of the housing 20. Has been planted. The protruding portion 35 is formed at a position where the tip thereof faces the peripheral portion of the valve cap 50 and has a slight gap t between the peripheral portion of the valve cap 50.

  FIG. 5 is a view of the pair of projecting portions 24A and 24B constituting the groove portion 23 of the housing 20, the projecting portion 32 of the reflector 30, the screw screw base 33, and the projecting portion 35 as viewed from the rear side of the vehicular lamp 10. is there. That is, FIG. 5 shows a state in which the valve cap 50 and a rubber cover 60 described later are not yet attached. Here, for example, three screw screw mounts 33 are provided at equal intervals in the circumferential direction, and screw screw holes 33A are respectively provided on the top surfaces thereof.

  A rubber cover 60 is attached between the protruding portion 24 </ b> A of the housing 20 and the protruding portion 35 of the reflector 30. The rubber cover 60 has an annular shape, and an outer peripheral portion of the rubber cover 60 is provided with an inner protrusion of the pair of protrusions 24A and 24B formed on the periphery of the opening 21 of the housing 20 (in this specification, the An outer periphery fitting portion (indicated by reference numeral 60O in FIG. 4) that fits 24A, which is sometimes referred to as one projecting portion), has an inner periphery fitting portion that fits the projecting portion 35 of the reflector 30 on the inner periphery. (Indicated by reference numeral 60I in FIG. 4) is formed. In addition, a bellows portion (indicated by reference numeral 60M in FIG. 4) is provided between the outer peripheral fitting portion and the inner peripheral fitting portion of the rubber cover 60 to give the rubber cover 60 elasticity in the radial direction. Is formed.

  FIG. 4 is an enlarged cross-sectional view of the rubber cover 60. FIG. 4 shows a rubber cover 60 having a cross section taken along the line III-III in FIG.

  The outer peripheral fitting portion 60O of the rubber cover 60 is a pair of projecting portions constituting a groove portion 61 (also referred to as a first groove portion in this specification) having an opening on the front side (upper side in the drawing) of the vehicular lamp 10. 62A and 62B. A plurality of peak portions (valley portions) 63 arranged in parallel in the axial direction are formed on the inner peripheral surface of the protrusion portion 62B on the outer peripheral side of the pair of protrusion portions 62A and 62B. Further, a key-shaped locking portion 64 that protrudes toward the protruding portion 62B is formed on the outer peripheral surface at the tip of the protruding portion 62A on the inner peripheral side. Further, an annular projection 65 coaxial with the central axis of the rubber cover 60 is formed on the bottom surface of the groove 61 of the outer periphery fitting portion 60O. The outer periphery fitting portion 60O of the rubber cover 60 formed in this way is fitted into the protrusion portion 24A by inserting the protrusion portion 24A formed on the peripheral edge of the opening portion 21 of the housing 20 into the groove portion 61. It can be done. FIG. 1 is an enlarged cross-sectional view showing a state where the rubber cover 60 is fitted to the housing 20 and the reflector 30. As shown in FIG. 1, a locking portion 24P that protrudes toward the center of the opening 21 of the housing 20 is formed at the tip of the protruding portion 24A of the housing 20, and the protruding portion 24A is an outer periphery fitting portion 60O of the rubber cover 60. By being inserted into the groove portion 61, the rubber cover 60 is locked to the locking portion 64 of the protruding portion 62 </ b> A of the outer peripheral fitting portion 60 </ b> O, so that it is difficult to remove the rubber cover 60 from the housing 20. In this case, the protruding portion 24A of the housing 20 protrudes from each opposing side wall surface of the groove portion 61 due to the size of the groove portion 61 of the outer peripheral fitting portion 60O of the rubber cover 60 and the elasticity of the material of the rubber cover 60. The parts 62A and 62B are clamped with a relatively strong force, thereby ensuring sufficient sealing performance against moisture intrusion and the like. In this case, the projecting portion 24A of the housing 20 is in contact with each of a crest portion (valley portion) 63 arranged in parallel with the inner peripheral surface of the projecting portion 62B of the rubber cover 60 and a projecting portion 65 formed on the bottom surface of the groove portion 61. Since it is in contact and disposed in the groove 61, the sealing performance is further improved.

  Then, from the base part (the part opposite to the tip) of the protruding part 62A of the outer periphery fitting part 60O of the rubber cover 60, the rear part (lower side in the figure) of the vehicle lamp 10, and the front part of the vehicle lamp 10 (see FIG. A bellows portion 60M extending in a meandering manner is formed so as to have convex portions in the middle (upper middle), and the bellows portion 60M is connected to the inner peripheral fitting portion 60I of the rubber cover 60. . The bellows portion 60M has elasticity in the radial direction of the rubber cover 60, and is formed thinner than the outer peripheral fitting portion 60O and the inner peripheral fitting portion 60I of the rubber cover 60, for example. .

  Returning to FIG. 4, the inner periphery fitting portion 60 </ b> I of the rubber cover 60 has a groove portion 67 (which may be referred to as a second groove portion in this specification) 67 having an opening on the front side (upper side in the drawing) of the vehicular lamp 10. It is comprised by a pair of protrusion part 68A, 68B to comprise. In this case, of the pair of projecting portions 68A and 68B, the projecting portion 68B on the outer peripheral side is configured to also serve as a part of the bellows portion 60M, and is formed to have substantially the same thickness as the bellows portion 60M. As shown in FIG. 1, the inner peripheral fitting portion 60 </ b> I of the rubber cover 60 formed in this way corresponds to the bottom portion of the groove portion 67 by inserting the protruding portion 35 formed in the reflector 30 into the groove portion 67. The projecting portion 35 can be fitted by holding the portion 69, that is, the climbing portion 69 straddling the tip of the projecting portion 35 between the projecting portion 35 and the bubble cap 50. In this case, at least the climbing part 69 of the rubber cover 60 needs to have a thickness equal to or greater than the gap t between the tip of the protruding part 35 and the bubble cap 50. As a result, the clamping force P of the rubber cover 60 to the ride-over portion 69 by the tip of the protrusion 35 and the bubble cap 50 is determined by the elastic force of the rubber cover 60 itself and the value of the gap t. By setting to an appropriate value, it is possible to ensure a highly reliable sealing performance. A protrusion 35N is provided along the circumferential direction on the front end surface of the protrusion 35 of the reflector 30, and the protrusion 69 when the climbing portion 69 of the rubber cover 60 is sandwiched between the protrusion 35 and the valve cap 50. The portion 35N is bitten into the overpass portion 69 of the rubber cover 60 so that a further sealing property is secured between the protruding portion 35 and the rubber cover 60. In addition, as described above, since a reliable sealing property can be ensured in the crossover portion 69 that straddles the tip of the protruding portion 35 in the inner peripheral fitting portion 60I of the rubber cover 60, as shown in Patent Document 1. For example, it can be set as the structure which does not need to press the side surface of the protrusion part 35 of the reflector 30 by the protrusion part 68A. In FIG. 1, it is assumed that a gap 70 is generated between the protruding portion 68B of the inner periphery fitting portion 60I and the protruding portion 35 of the reflector 30, and even in such a state, the rubber is drawn. It shows that a reliable sealing property can be secured in the crossover portion 69 that straddles the tip of the protruding portion 35 of the reflector 30 in the inner peripheral fitting portion 60I of the cover 60.

  As described above, since the inner periphery fitting portion 60I of the rubber cover 60 is configured as described above, it is possible to avoid a configuration in which the side surface of the protruding portion 36 of the reflector 30 is pressed by the elasticity of the rubber cover itself. After the outer peripheral fitting portion 60O of the rubber cover 60 is fitted to the protruding portion 24A of the housing 20, the inner peripheral fitting portion 60I can be fitted to the protruding portion 35 of the reflector 30 very easily.

  Further, as described above, of the pair of projecting portions 68A and 68B constituting the groove portion 67, the projecting portion 68B can be used as a part of the bellows portion 60M, whereby the length of the bellows portion 60M in the radial direction can be obtained. The effect that can be shortened can be produced.

FIG. 2B is a view showing a state in which the valve cap is attached after the rubber cover 60 is fitted to the housing 20 and the reflector 30 (the light source bulb 40, the socket 41, and the connector 42 are not shown). ). The annular valve cap 50 is formed by inserting a screw 34 inserted through three screw insertion holes 51 formed at equal intervals in the circumferential direction into the screw insertion holes 33A of the screw insertion base 33, thereby reflecting the reflector. 30 is fixed. The valve cap 50 is formed in such a size that the outer peripheral portion thereof covers the protruding portion 35 implanted in the reflector 30, and when the valve cap 50 is fixed to the reflector 30, the inner periphery fitting portion 60 </ b> I of the rubber cover 60 is formed. A part (passing part 69) is sandwiched between the tips of the protrusions 35. Thereby, the inner periphery fitting part 60I of the rubber cover 60 can be fitted to the protruding part 35 in a state where the sealing property is ensured. Further, on the inner periphery of the valve cap 50, for example, three cutouts 53 are formed at equal intervals in the circumferential direction. Each notch 53 is arranged, for example, close to each screw screw base 33 in the clockwise direction. The flange 41A of the socket 41 of the light source bulb 40 is formed in such a shape that the notches 53 of the bulb cap 50 are inserted when the socket 41 is moved in the axial direction, and then the socket 41 is rotated clockwise. By rotating in the direction, the flange portion 41 </ b> A is disposed between the protruding portion 32 and the valve cap 50, and the socket 41 is attached to the reflector 30.
(Embodiment 2)
In the first embodiment described above, a part of the rubber cover 60 (overriding portion 69) that climbs over the tip of the projecting portion 35 formed on the reflector 30 is pressed by the pressing member including the valve cap 50. is there. However, the pressing member may be constituted by another member that is separate from the valve cap 50. This is because the same effect can be obtained if the pressing member is a member fixed to the reflector 30.

  As will be apparent from the above description, according to the vehicular lamp of the present invention, the rubber cover can be attached very easily, and sufficient sealing performance can be secured by the rubber cover.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiments. Further, it is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Vehicle lamp, 20 ... Housing, 21 ... Opening, 23 ... Groove, 24A ... Projection (first projection), 24B ... Projection, 30 ... Reflector, 30A ... Reflection Surface, 31... Opening, 32... Projection, 33... Screw screw base, 33 A... Screw screw hole, 34 ... Screw, 35 ... Projection (second projection), 35 N. Projection, 40 ... Light source bulb, 41 ... Socket, 41A ... Bridge, 42 ... Connector, 50 ... Bulb cap, 51 ... Screw insertion hole, 53 ... Notch, 60 ... Rubber cover, 60O: outer periphery fitting portion, 61: groove portion, 62A: projecting portion, 62B ... projecting portion, 63 ... mountain portion (valley portion), 64 ... locking portion, 65 ... projecting portion, 67 ... ... groove part, 68A, 68B ... projection part, 69 ... override part, 70 ... gap.

Claims (3)

A vehicle lamp provided with a ring-shaped rubber cover between a housing defining a lamp chamber and a light source bulb mounting portion of a reflector disposed in the lamp chamber,
The rubber cover includes an outer periphery fitting portion having a first groove portion through which a cylindrical first protrusion portion implanted in the housing is inserted in an outer peripheral portion, and a cylindrical shape implanted in the reflector on an inner peripheral portion. It has an inner periphery fitting part provided with the 2nd groove part which penetrates the 2nd projection part,
The outer periphery fitting portion is configured to fit the first protrusion by sandwiching the first protrusion inserted into the first groove by the opposing side wall surfaces of the first groove,
The inner periphery fitting portion is clamped by a pressing member that is fixedly attached to the tip of the second protrusion and the reflector at the crossing portion straddling the tip of the second protrusion inserted into the second groove. By doing this, the said 2nd protrusion part is fitted, The vehicle lamp characterized by the above-mentioned.   The vehicular lamp according to claim 1, wherein the pressing member is a ring-shaped bulb cap for attaching the light source bulb to the reflector. The vehicular lamp according to claim 1, wherein the rubber cover includes a bellows portion between an outer periphery fitting portion and an inner periphery fitting portion.

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