JP5694822B2 - Vehicle lighting - Google Patents

Description

  The present invention relates to a vehicular lamp, and more particularly to a vehicular lamp having a hermetic sealing mechanism including a housing and a lens constituting the vehicular lamp.

  Conventionally, the thing of the structure shown in FIG. 11 as this kind of vehicle lamp is disclosed. The lens mounting groove 81 is provided at the opening end of the housing 80, and the lens leg 83 that can be inserted into the lens mounting groove 81 is provided at the opening end of the lens 82.

  Then, the lens leg 83 is inserted into the lens mounting groove 81 of the housing 80 filled with the sealing material 84 in advance and immersed in the sealing material 84, whereby the lens leg 83 is attached to the lens via the sealing material 84. It is engaged with the groove 81.

  Furthermore, a straight needle 87 that penetrates the lens leg 83 from the outer wall 85 of the lens mounting groove 81 to the inner wall 86 of the lens mounting groove 81 is driven into the engaging portion between the lens leg 83 and the lens mounting groove 81. Thus, the lens leg 83 and the lens mounting groove 81 are mechanically fastened via the straight needle 87 (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 3-207635

  By the way, in the vehicular lamp having the above-described configuration, as a method of driving the straight needle into the engaging portion between the lens leg portion and the lens mounting groove, a method of directly driving the straight needle and a portion where the heated long wire material is press-fitted and press-fitted A method (disclosed in Japanese Patent Laid-Open No. 1-238902) is conceivable in which a needle member is formed by cutting the wire.

  Among them, in the method of directly driving the straight needle 87, a force in the driving direction is applied to the lens leg 83 due to an impact at the time of driving, and the lens leg 83 is displaced. Then, the force due to the displacement of the lens leg 83 is also applied to the sealing material 84 positioned on both sides of the lens leg 83, causing displacement. As a result, peeling occurs at the interface between the lens leg 83 and the sealing material 84, and the airtightness between the two may be impaired.

  On the other hand, the method of press-fitting a heated long wire requires a large-scale device, leading to an increase in manufacturing cost.

  Therefore, the present invention was devised in view of the above problems, and its object is to provide a lens mounting groove of a housing constituting a vehicular lamp and a lens leg portion of a lens inserted into the lens mounting groove. In a mechanism that hermetically seals and fixes with a sealing material (adhesive) filled in the lens mounting groove in advance (airtight sealing mechanism), a simple method and low cost are ensured while ensuring airtightness between the two. An object is to realize an airtight sealing mechanism that can be assembled.

  In order to solve the above-mentioned problem, the invention described in claim 1 of the present invention is a vehicular lamp having an airtight sealing mechanism by a housing and a lens, and the housing has an annular opening end portion. A lens mounting groove having a predetermined width and depth is formed along the opening end, and the lens has a lens leg having a predetermined width and length along the opening end at the annular opening end. A first rib and a second rib extending from the front side of the lens to the opening end side with a predetermined width and a predetermined height on each of the outer surface side and the inner surface side. Ribs are formed at predetermined intervals in the annular direction, and the lens leg is inserted into the lens mounting groove, and at least a part of the lens leg is immersed in an adhesive filled in the lens mounting groove. From the outer wall of the lens mounting groove, the adhesive, front Implantation member extending inwardly walls lens legs and the adhesive are successively through is characterized in what is implanted at predetermined intervals in an annular direction.

  According to a second aspect of the present invention, in the first aspect, the distance between the second rib positioned between the lens leg portion and the inner side wall and the driving member is 3 mm. The distance between the first rib positioned between the lens leg and the outer wall and the driving member is 10 mm or less.

  According to a third aspect of the present invention, there is provided a vehicular lamp having a hermetic sealing mechanism including a housing and a lens, wherein the housing has an annular opening end along the opening end. A lens mounting groove having a predetermined width and depth is formed, and the lens is trifurcated into three or three branches, each having a predetermined width and length and arranged in parallel with each other at a predetermined interval. The lens leg is formed at the annular opening end along the opening end, and the outer wall and the inner wall of the lens mounting groove are located on both outer sides of the three lens legs. A lens leg portion located on the inner side is inserted into the lens mounting groove and at least part of the lens leg is immersed in an adhesive filled in the lens mounting groove. From the outer wall of the adhesive, the lens leg Implantation member extending sequentially through to the inner wall of the fine said adhesive is characterized in that it is driven at a predetermined interval in the annular direction.

  The vehicular lamp according to the present invention has a hermetic sealing mechanism by a housing and a lens, and a first rib and a second rib at predetermined intervals on both sides in a lens mounting groove of the housing, which is filled with an adhesive in advance. The lens is provided with a rib, and the lens leg portion of the lens is inserted for positioning, and the adhesive member, the lens leg portion and the adhesive agent are sequentially penetrated from the outer wall of the lens mounting groove to reach the inner wall. Is driven into a predetermined position.

  Thus, even when an impact force due to driving of the driving member is applied to the lens leg, the lens leg is formed into the lens mounting groove by the first rib and the second rib provided on both sides of the lens leg. The movement and displacement in both the inner wall direction and the outer wall direction are suppressed.

  As a result, it is possible to prevent the adhesive being cured from being peeled off at the interfaces with both surfaces of the lens leg, thereby providing a highly airtight sealing mechanism.

It is a longitudinal cross-sectional view of the opening edge part of the housing which comprises embodiment concerning this invention. Similarly, it is a longitudinal sectional view of the opening end of the lens constituting the embodiment. It is a longitudinal cross-sectional view of the airtight sealing mechanism of embodiment. It is sectional drawing which follows the AA line of FIG. FIG. 4 is a view taken in the direction of arrow B in FIG. 3. It is a top view of the vehicular lamp of the present invention. It is a longitudinal cross-sectional view of the airtight sealing mechanism of other embodiment. It is C arrow line view of FIG. It is a longitudinal cross-sectional view of the airtight sealing mechanism of other embodiment. It is D arrow line view of FIG. It is explanatory drawing of a prior art example.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 to 10 (the same parts are denoted by the same reference numerals). The embodiments described below are preferable specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention particularly limits the present invention in the following description. Unless stated to the effect, the present invention is not limited to these embodiments.

  FIG. 1 is a longitudinal sectional view of an opening end portion of a housing constituting an embodiment of a vehicle lamp according to the present invention, and FIG. 2 is a longitudinal sectional view of an opening end portion of a lens constituting the embodiment, 3 is a longitudinal sectional view of the hermetic sealing mechanism by the opening end of the housing and the opening end of the lens, FIG. 4 is a sectional view taken along the line AA in FIG. 3, and FIG. FIG. 6 is a top view of the vehicular lamp.

  As shown in FIG. 1, the housing 1 is provided with a lens mounting groove 3 having a predetermined width (w1) and depth in an annular shape along the opening end 2 in the annular opening end 2 like the conventional housing. ing. On the other hand, as shown in FIG. 2, the lens 4 has a predetermined width (w2) and a length that can be inserted into the lens mounting groove 3 along the opening end 5 along the opening end 5 like the conventional lens. A lens leg portion 4a having a thickness is provided in an annular shape, and a stopper portion 4b that rises from a side surface of the lens leg portion 4a and extends laterally is provided in the lens leg portion 4a in an annular shape.

  Further, at the opening end portion 5 of the lens 4, on one side (outside) of the lens leg portion 4a, the side surface of the stopper portion 4b extends along the lens leg portion 4a in the direction of the tip end portion of the lens leg portion 4a. A first rib 6 having a predetermined width and a predetermined height (h1) from the lens leg 4a is provided at a predetermined position in the annular direction.

  At the same time, on the other side (inner side) of the lens leg 4a, the lens leg has a predetermined width and lens leg extending from the front surface 7 of the lens 4 along the lens leg 4a in the direction of the tip of the lens leg 4a. A second rib 8 having a predetermined height (h2) from the portion 4a is provided at a predetermined position in the annular direction.

  In this case, the width (w1) of the lens mounting groove 3, the width (w2) of the lens leg 4a, the height (h1) of the first rib 6, and the height (h2) of the second rib 8 Is preferably in a relationship of w1≈h1 + W2 + h2. Moreover, it is preferable that h1 and h2 have a relationship of h1≈h2.

  Accordingly, as shown in FIGS. 3 and 4, in the hermetic sealing mechanism between the housing 1 and the lens 4, an adhesive 9 (for example, a two-pack type silicone adhesive, 2) is placed in the lens mounting groove 3 of the housing 1. A lens leg portion 4a provided with a first rib 6 and a second rib 8 on both sides before the adhesive 9 is cured. Is inserted into the lens mounting groove 3.

  Then, the positioning of the lens leg 4a in the width direction of the lens mounting groove 3 is such that the lens leg 4a having the width (w2), the first rib 6 having the height (h1), and the first rib 6 having the height (h2). This is ensured with the two ribs 8. That is, the apex of the first rib 6 is in contact with the inner surface of the outer wall 10 of the lens mounting groove 3, and the apex of the second rib 8 is in contact with the inner surface of the inner wall 11 of the lens mounting groove 3. Is in a state. In addition, the positioning of the lens leg 4 a with respect to the depth direction of the lens mounting groove 3 is ensured by the stopper portion 4 b of the lens leg 4 a contacting the tip surface 10 a of the outer wall 10 of the lens mounting groove 3.

  However, in this state, the positioning of the lens legs 4a with respect to the lens mounting grooves 3 is temporarily performed, but the temporarily fixed state of each other is not maintained, and in this state, the adhesive 9 when the lens legs 4a are cured. The buoyancy of the lens 9 causes the adhesive 9 to solidify when the lens mounting groove 3 is positioned in the depth direction in an uncertain state.

  Therefore, when the lens leg 4a is inserted into the lens mounting groove 3 at a predetermined position, the adhesive 9, the lens leg 4a and the adhesive 9 are sequentially penetrated from the outer wall 10 of the lens mounting groove 3, and the inner wall is passed through. A plurality of staples 12 reaching 11 are driven into a predetermined position in the annular direction. Thus, the lens leg 4a is temporarily fixed in a state where the lens leg 4a is inserted and positioned at a predetermined position of the lens mounting groove 3, and the lens leg 4a is moved to a predetermined position of the lens mounting groove 3 by the cured adhesive 9. It is fixed and hermetically sealed with each other.

  For example, the staple 12 is formed by processing a wire material into a substantially U-shape, and a pair of needle-shaped tip portions are in an annular direction along the opening end portion 2 of the housing 1 or the opening end portion 5 of the lens 4. (See FIG. 5). However, the shape of the staple 12 is not limited to a substantially U shape, and may be a simple linear shape, for example.

  At this time, when the staple 12 is driven, the lens leg 4a receives a force in the driving direction due to the driving impact, that is, a force toward the inner wall 11 of the lens mounting groove 3, but the lens leg 4a and the inner wall The movement of the lens leg portion 4a toward the inner wall 11 side is suppressed by the second rib 8 located between the second rib 8 and the second rib 8.

  At the same time, the impact at the time of driving the staple 12 received by the lens leg portion 4a acts not only in the driving direction of the staple 12, but also in the opposite direction, that is, in the direction of the outer wall 10 of the lens mounting groove 3. The movement of the lens leg 4a toward the outer wall 10 due to the impact force is suppressed by the first rib 6 positioned between the lens leg 4a and the outer wall 10.

  Therefore, the positional relationship in the annular direction between the first rib 6, the second rib 8, and the staple 12 is the direction in which the staple of the lens leg 4a is driven in with respect to the position of the staple 12, as shown in FIG. That is, the distance A to the second rib 8 provided inside is preferably 3 mm or less. When the distance A is 5 mm or more, the lens leg portion 4a is moved and displaced toward the inner wall 11 side of the lens mounting groove 3 when the staple 12 is driven, and the effect of suppressing the intended movement displacement provided with the second rib 8 is weakened. It will be.

  In contrast, the distance B from the position of the staple 12 to the first rib 6 provided in the direction opposite to the direction in which the staple of the lens leg 4a is driven, that is, the outer side, may be longer than the distance A. An effect of suppressing movement displacement is obtained, and it is effective if it is at least 10 mm or less.

  The distance B from the staple 12 to the first rib 6 may be longer than the distance A from the staple 12 to the second rib 8 because the impact force when driving the staple 12 works strongly in the driving direction. This is because the force acting in the direction opposite to the driving direction is weak. Therefore, in the driving direction of the staple 12, it is necessary to arrange the second rib 8 closer to the staple than in the direction opposite to the driving direction to obtain an effect of suppressing the movement displacement due to a stronger impact force. It is.

  The position of the staple 12 in the annular direction of the opening end 2 of the housing 1 is a substantially point-symmetrical position about the substantially center position of the housing 1 as shown in FIG. 6 (top view of the vehicular lamp). It is preferable. Thereby, it arrange | positions in the position where the housing 1 and the lens 4 which comprise the vehicle lamp 20 were balanced.

  The lengths of the first rib 6 and the second rib 8 in the distal direction of the lens legs 4a are determined in advance when the lens legs 4a are inserted into the lens mounting grooves 3 and positioned. The length immersed in the adhesive 9 with which the groove | channel 3 was filled may be sufficient. Accordingly, the length of the lens leg 4a in the distal direction is appropriately set in consideration of the filling condition of the adhesive 9.

  As a result, the outer wall 10 of the lens mounting groove 3, the lens leg 4a, and the first rib 6 are integrated via the adhesive 9, and at the same time, the inner wall 11 of the lens mounting groove 3, the lens leg 4a, and the first rib 6 are integrated. The two ribs 8 are integrated with each other through the adhesive 9, and the positioning and fixing of the lens leg 4 a with respect to the lens mounting groove 3 is more reliable.

  Therefore, the first rib 6 and the second rib 8 have a function of positioning the lens leg 4a with respect to the lens mounting groove 3, and a function of suppressing movement displacement of the lens leg 4a due to an impact force when the staple 12 is driven. It is.

  As described above, the hermetic sealing mechanism between the housing 1 and the lens 4 related to the vehicular lamp according to the present invention is predetermined on each of the both sides in the lens mounting groove 3 of the housing 1 filled with the adhesive 9 in advance. The lens leg 4a of the lens 4 provided with the first rib 6 and the second rib 8 at the interval is inserted for positioning, and the lens leg 4a is inserted from the outer wall 10 of the lens mounting groove 3. The lens 4 is hermetically sealed and fixed to the housing 1 by hardening the adhesive 9 in a state where the staples 12 penetrating to the inner wall 11 are driven into predetermined positions and temporarily fixed and integrated. It is a thing.

  As a result, even if an impact force due to driving of the staple 12 is applied to the lens leg portion 4a, the lens leg portion 4a is provided by the first rib 6 and the second rib 8 provided on both sides of the lens leg portion 4a. Is prevented from moving in both directions of the inner wall 11 direction and the outer wall 10 direction of the lens mounting groove 3.

  As a result, the adhesive 9 being cured is prevented from being peeled off at the interfaces with both surfaces of the lens leg portion 4a, resulting in a highly airtight sealing mechanism.

  The opening end of the lens that is hermetically sealed and fixed in the lens mounting groove of the housing is made of an annular lens leg having a predetermined width that can be inserted into the lens mounting groove as described above. FIG. 7 (vertical cross-sectional view of the hermetic sealing mechanism) and FIG. 8 (viewed in the direction of arrow C in FIG. 7), and three branched lens legs (first lens leg 15a, second Lens leg portion 15b and third lens leg portion 15c), and each lens leg portion 15a, 15b, 15c has a predetermined width and is arranged in a ring shape with a predetermined distance from each other. It is also possible.

  In this case, the outer side wall 10 and the inner side wall 11 constituting the lens mounting groove 3 of the housing 1 are the first lens leg 15a and the inner side which are located outside of the three lens legs 15a, 15b and 15c of the lens 15. The second lens leg portion 15 b located on the inner side is inserted into the lens mounting groove 3 and immersed in the adhesive 9 so as to be covered with the third lens leg portion 15 c located on the inner side. In other words, the outer surface of the outer wall 10 of the lens mounting groove 3 is in contact with the inner surface of the first lens leg 15a, and the outer surface of the inner wall 11 of the lens mounting groove 3 is in contact with the inner surface of the third lens leg 15c.

  Then, the staple 12 that sequentially passes through the adhesive 9, the lens leg portion 15 b on the inner side of the lens 15, and the adhesive 9 from the outer wall 10 of the lens mounting groove 3 to at least the inner wall 11 of the lens mounting groove 3 is annular. A plurality of positions are driven at predetermined positions in the direction. As a result, the lens 15 is hermetically sealed and fixed to the housing 1.

  In such an airtight sealing mechanism, the second lens leg portion 15b inserted into the lens mounting groove 3 due to the impact of the staple 12 being driven receives a force in the driving direction, but the first lens leg portion of the lens 15 Since the 15a and the third lens leg portion 15c are fitted to the outer wall 10 and the inner wall 11 constituting the lens mounting groove 3 of the housing 1, the movement toward the driving direction is suppressed. .

  As a result, similar to the above-described hermetic sealing mechanism, the adhesive 9 during curing is prevented from being peeled off at the interfaces with both surfaces of the lens leg portion 15b, and a highly airtight sealing effect is obtained. Can do.

  As another hermetic sealing mechanism, as shown in FIG. 9 (longitudinal sectional view of the hermetic sealing mechanism) and FIG. 10 (viewed in the direction of arrow D in FIG. 9), the lens 4 in the lens mounting groove 3 of the housing 1 is used. The leg 4a is inserted and immersed in the adhesive 9, and an extension 16 is extended on the inner wall 11 side of the lens mounting groove 3 of the lens leg 4a, and the end of the extension 16 is the lens leg. The staple 12 is in contact with both the portion 4a and the inner surface of the inner wall 11, and sequentially passes through the adhesive 9, the lens leg 4a and the adhesive 9 from the outer wall 10 of the lens mounting groove 3 to the inner wall 11. Are driven into a predetermined position in the annular direction.

  As a result, the lens leg 4a inserted into the lens mounting groove 3 by the impact of driving the staple 12 receives a force in the driving direction, that is, a force toward the inner wall 11 of the lens mounting groove 3, but the lens leg 4a The extension 16 positioned between the inner wall 11 and the lens leg 4a is restrained from moving toward the inner wall 11 side.

  As a result, similar to the above-described hermetic sealing mechanism, the adhesive 9 during curing is prevented from being peeled off at the interfaces with both surfaces of the lens leg 4a, and a highly airtight sealing effect is obtained. Can do.

DESCRIPTION OF SYMBOLS 1 ... Housing 2 ... Opening edge part 3 ... Lens mounting groove 4 ... Lens 4a ... Lens leg part 4b ... Stopper part 5 ... Opening edge part 6 ... 1st rib 7 ... Front part 8 ... 2nd rib 9 ... Adhesive DESCRIPTION OF SYMBOLS 10 ... Outer wall 10a ... Tip surface 11 ... Inner wall 12 ... Staple 15 ... Lens 15a ... First lens leg 15b ... Second lens leg 15c ... Third lens leg 16 ... Extension 20 ... Vehicle lamp

Claims (3)

A vehicle lamp having an airtight sealing mechanism by a housing and a lens,
The housing is formed with a lens mounting groove having a predetermined width and depth along the opening end at the annular opening end,
The lens has a lens leg portion having a predetermined width and length along the opening end portion at the annular opening end portion, and the lens leg portion has a predetermined shape on each of the outer surface side and the inner surface side. The first rib and the second rib extending from the front surface side of the lens to the opening end side with a predetermined width and a predetermined height are formed at predetermined intervals in the annular direction, respectively.
At least a part of the lens leg is immersed in an adhesive filled in the lens mounting groove by inserting the lens leg into the lens mounting groove,
A driving member that sequentially penetrates the adhesive, the lens leg portion, and the adhesive from the outer wall of the lens mounting groove to reach the inner wall is driven at predetermined intervals in an annular direction. Vehicle lamp.   The distance between the second rib positioned between the lens leg and the inner wall and the driving member is 3 mm or less, and the second rib positioned between the lens leg and the outer wall. The vehicular lamp according to claim 1, wherein a distance between the rib of 1 and the driving member is 10 mm or less. A vehicle lamp having an airtight sealing mechanism by a housing and a lens,
The housing is formed with a lens mounting groove having a predetermined width and depth along the opening end at the annular opening end,
The lens is divided into three branches, each having a predetermined width and length, and three lens legs arranged in parallel with each other at a predetermined interval. Formed along
The outer and inner walls of the lens mounting groove are fitted so as to cover the lens legs located on both outer sides of the three lens legs, and the lens legs located on the inner side are attached to the lens mounting groove. At least a part thereof is immersed in an adhesive inserted into the groove and filled in the lens mounting groove,
A driving member that sequentially penetrates the adhesive, the lens leg portion, and the adhesive from the outer wall of the lens mounting groove to reach the inner wall is driven at predetermined intervals in an annular direction. Vehicle lamp.

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