JP2012169043A - Lamp for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mold a product with an engagement shape prepared for a component with an opening that is engaged with the other component covering the former and its opening without the use of a sliding mold.SOLUTION: The lamp for a vehicle 1 is provided with a housing 2, a reflector 3 formed into a shape opened frontward to be insertion-coupled with an insertion-coupling part 21 of the housing 2, and a lens 4 covering the opening of the reflector 3. The housing 2 has a concave part 24 opened forward and provided at a peripheral edge of the insertion-coupling part 21. The reflector 3 is provided with an extension part 31 extended out from an outer periphery face in an up-and-down direction and arranged at a right inner side face side in the concave part 24, and fastened and fixed to the housing at a bottom. The lens 4 is provided with a protruded part 41 formed protrusively rearward and having a locking recess 41a formed at an outside face. The protruded part 41 is pinched by a left inner side face of the concave part 24 and the extended part 31 with the locking recess 41a locked to the extended part 31 in a cross direction.

Description

  The present invention relates to a vehicular lamp.

  Conventionally, in a vehicular lamp such as an automobile headlight, a lens and a housing (or an extension or the like) are fixed to each other by a plurality of engaging portions (for example, see Patent Document 1).

  In general, as shown in FIG. 4, the engaging portion includes a concave portion 80 formed on a component A (for example, a housing) and a convex portion 90 formed on a component B (for example, a lens) in an engaging direction X. It is the structure engaged with each other along. The concave portion 80 and the convex portion 90 have a locking hole 81 and a locking projection 91 formed in a direction substantially orthogonal to the engaging direction X, and the locking hole 81 and the locking projection 91 are engaged when engaged. By locking each other, dropping off is prevented.

  The concave portion 80 and the convex portion 90 are resin-molded integrally with each component. In the main mold used in this molding, the mold drawing direction is a direction substantially along the engagement direction X. In such a main mold, the locking hole 81 and the engagement in the direction substantially orthogonal to the engagement direction X are used. The stop protrusion 91 cannot be molded. Therefore, a slide mold that can move in a direction substantially orthogonal to the engagement direction X with respect to the main mold is used for molding the locking hole 81 and the locking protrusion 91.

JP 2010-272332 A

  However, in the structure of the engaging portion, for example, when trying to mold a plurality of convex portions 90 on a component B having an opening shape, a plurality of slides for molding a plurality of locking protrusions 91 depending on the size of the component B. The movement range of the mold may overlap. That is, when trying to mold a plurality of locking projections 91 on the inside of the small-sized part B, a plurality of slide molds interfere with each other, so the number of projecting portions 90 that can be molded is limited and fixed. The required number of engaging portions cannot be provided.

  The present invention has been made in view of the above circumstances, and uses a slide mold that is an engagement shape provided in a component having an opening shape and engages the component with another component covering the opening. An object is to provide a vehicular lamp that can be molded without any problems.

In order to solve the above problems, the invention according to claim 1 is a vehicle lamp,
A first part having a fitting portion that opens forward;
A second part that is formed in a shape that opens forward and is fitted to the fitting part;
A third part covering the opening of the second part;
With
The first part has a recess opening forward, at a peripheral edge of the fitting part,
The second part extends from the outer peripheral surface of the second part so as to extend in a direction perpendicular to the front-rear direction, and has an extension portion disposed on one inner surface side in the recess. And is fastened and fixed to the first part at the bottom,
The third component has a protruding portion formed on the outer surface with a locking recess that opens to the side and protrudes rearward at the peripheral portion of the third component,
The protruding portion is sandwiched between the other inner side surface of the recess and the extending portion in a state where the locking recess is locked to the extending portion in the front-rear direction.

The invention according to claim 2 is the vehicle lamp according to claim 1,
The other inner surface of the concave portion is inclined so as to approach the projecting portion as it goes rearward.

The invention according to claim 3 is the vehicle lamp according to claim 1 or 2,
The first part is a housing;
The second part is a reflector;
The third component is a lens.

  According to the present invention, the second part is fastened and fixed to the first part, and the extending part that extends from the outer peripheral surface of the second part protrudes from the third part. The projecting portion is sandwiched between the inner surface of the recess formed in the first component and the extending portion in a state of being locked in the locking recess in the front-rear direction. That is, by fitting the first component, the second component, and the third component in the front-rear direction, the projecting portion is sandwiched between the inner surface of the recess and the extending portion, and the third component is the first component. The second part and the second part are engaged. Accordingly, the second component formed in the shape opening forward is not provided with a locking hole or a locking projection in a direction orthogonal to the engagement direction (front-rear direction), and the second component and the second component are formed. Three parts can be engaged. Therefore, the engagement shape provided in the second part for engaging the third part can be molded without using a slide mold.

It is a disassembled perspective view which shows the principal part of the vehicle lamp in embodiment. It is sectional drawing which shows the engaging part of the vehicle lamp in embodiment. It is sectional drawing which shows the other engaging part of the vehicle lamp in embodiment. It is sectional drawing which shows the engaging part of the conventional vehicle lamp.

  Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view showing a main part of a vehicular lamp 1 according to the present embodiment.
In the following description, unless otherwise specified, “up”, “down”, “front”, “rear”, “left”, and “right” refer to the direction viewed from the vehicular lamp 1, and It shall be used corresponding to the description.

  As shown in FIG. 1, the vehicular lamp 1 is a rear combination lamp disposed at a rear end portion of a vehicle (not shown), and includes a housing 2, a reflector 3, and a lens 4.

  The housing 2 is formed in a shape having an open front surface, and has a recess 20 for constituting a turn lamp in the lower half, and a fitting portion 21 for constituting a tail lamp and a stop lamp in the upper half. is doing. The fitting part 21 is formed in a substantially cylindrical shape that opens forward, and has a notch 22 at the right end of the peripheral edge thereof. A protruding wall 23 is erected on a portion of the bottom surface of the fitting portion 21 that is located slightly closer to the center of the notch 22. The right outer surface of the projection wall 23 is formed in a tapered shape that is inclined to the right side toward the base end side (rear) (see FIG. 2). A concave portion 24 that opens forward is formed by the right outer surface of the projection wall 23 and the inner surface and the bottom surface of the fitting portion 21 that is located behind the notch 22. An insertion hole 25 is formed in the bottom surface of the fitting portion 21.

The reflector 3 is formed in a substantially cylindrical shape that opens forward, and is fitted to the fitting portion 21 of the housing 2. The reflector 3 has a reflecting surface at the bottom, and reflects light from a light source (not shown) inserted from the rear through the bottom of the fitting portion 21. An extending portion 31 extending in the vertical direction extends from the outer peripheral surface of the right outer peripheral portion of the reflector 3. The extending portion 31 is formed so as to be disposed on the right inner surface side in the concave portion 24 of the housing 2 (see FIG. 2). Two protrusions 32 and 32 are formed on the inner peripheral surface of the reflector 3. The three protrusions 32 and 32 including the extending part 31 are arranged so as to be three equally spaced on the circumference.
Further, as shown in FIG. 2, a screw hole 33 is formed in the bottom (rear surface) of the reflector 3. The reflector 3 is fastened and fixed to the housing 2 by screwing the fastening screw 5 inserted into the insertion hole 25 of the housing 2 into the screw hole 33.

  As shown in FIG. 1, the lens 4 is formed in a substantially disk shape having the same size as the front opening of the reflector 3 and is disposed so as to cover the front opening of the reflector 3. A protruding portion 41 is formed at the right end of the peripheral edge of the lens 4 so as to protrude rearward. A locking recess 41 a that opens to the right is formed on the outer surface of the tip of the protruding portion 41. The locking recess 41a is formed in a substantially U shape in top view so that the left half of the extension 31 of the reflector 3 is fitted (see FIG. 2). Further, as shown in FIG. 3, an extending portion 42 that extends rearward along the inner peripheral surface of the reflector 3 is formed on the peripheral portion of the lens 4. The extension 42 is provided at two locations corresponding to the protrusions 32 and 32 of the reflector 3, and an engagement hole 42 a that engages with the protrusion 32 is formed on the outer surface.

The lens 4 is fixed to the reflector 3 and the housing 4 by being fitted to the housing 2 from the front in a state of being assembled with the reflector 3.
Specifically, first, the engaging holes 42a of the two extending portions 42, 42 of the lens 4 are engaged with the projecting portions 32, 32 of the reflector. At the same time, as shown in FIG. 2, the protruding portion 41 of the lens 4 is inserted into the recess 24 of the housing 2 with the extending portion 31 of the reflector 3 locked in the locking recess 41a in the front-rear direction. As a result, the projecting portion 41 is sandwiched between the extending portion 31 and the left inner surface of the recess 24 (the right outer surface of the protruding wall 23). At this time, since the left inner surface of the recess 24 is inclined to the right side toward the rear, that is, is inclined so as to approach the protruding portion 41 toward the rear, the protruding portion 41 is As it is inserted deeply into the recess 24, it is pressed against the extension 31. Thereby, the latching recessed part 41a of the protrusion part 41 is reliably latched by the extension part 31, and can prevent the drop-off from the extension part 31 concerned.
The reflector 3 is fastened and fixed to the housing 2 by screwing the fastening screw 5 inserted into the insertion hole 25 of the housing 2 into the screw hole 33 of the reflector 3.
Thus, the lens 4 is fixed to the housing 2 and the reflector 3 at three positions on the circumference.

  As described above, according to the vehicular lamp 1, the projecting portion 41 is sandwiched between the left inner surface of the recess 24 and the extending portion 31 by fitting the housing 2, the reflector 3 and the lens 4 in the front-rear direction. Thus, the lens 4 is engaged with the housing 2 and the reflector 3. Accordingly, the reflector 3 and the lens 4 are engaged with each other without providing a locking hole or a locking projection in a direction orthogonal to the engaging direction (front-rear direction) on the reflector 3 formed in a shape opening forward. Can be combined. Therefore, one of the engagement shapes provided in the reflector 3 for engaging the lens 4 can be molded without using a slide mold.

  Thus, by making one of the engagement shapes provided on the reflector 3 into a shape that does not require a slide mold, all the engagement shapes including the protrusions 32 and 32 that require the slide mold are fixed to the lens 4. (3 in the present embodiment) can be molded as necessary. In addition, the engagement shape (extension part 31) which does not require a slide type | mold for shaping | molding is not limited to one, You may provide two or more.

  Further, since the left inner surface of the recess 24 is inclined so as to approach the projecting portion 41 as it goes rearward, the projecting portion 41 extends as it is inserted deeply into the recess 24. It is pressed against the part 31. Thereby, it can prevent that the latching recessed part 41a of the protrusion part 41 falls out from the extension part 31, and can prevent the lens 4 from dropping out by extension.

  The embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention.

1 Vehicle lamp 2 Housing (first part)
21 Fitting part 24 Recess 3 Reflector (second part)
31 Extension part 32 Projection part 4 Lens (third part)
41 Projecting part 41a Locking concave part 42 Extension part 42a Engagement hole 5 Fastening screw

Claims (3)

A first part having a fitting portion that opens forward;
A second part that is formed in a shape that opens forward and is fitted to the fitting part;
A third part covering the opening of the second part;
With
The first part has a recess opening forward, at a peripheral edge of the fitting part,
The second part extends from the outer peripheral surface of the second part so as to extend in a direction perpendicular to the front-rear direction, and has an extension portion disposed on one inner surface side in the recess. And is fastened and fixed to the first part at the bottom,
The third component has a protruding portion formed on the outer surface with a locking recess that opens to the side and protrudes rearward at the peripheral portion of the third component,
The projecting portion is sandwiched between the other inner side surface of the recess and the extending portion in a state where the locking recess is locked to the extending portion in the front-rear direction. Lamps.   2. The vehicular lamp according to claim 1, wherein the other inner side surface of the concave portion is inclined so as to approach the projecting portion toward a rear side. The first part is a housing;
The second part is a reflector;
The vehicular lamp according to claim 1, wherein the third component is a lens.

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