JPH0754035Y2 - Lens mounting structure for vehicle lighting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a mounting structure of a lens in a vehicle lamp such as a room lamp or a map lamp for an automobile, and particularly, the lens and the switch knob are arranged side by side. The present invention relates to a lens mounting structure for preventing rattling of the switch knob of the lens.

[Prior Art] A conventional lens mounting structure of this type will be described with reference to FIGS.

FIG. 5 shows that the four sides of the substantially rectangular lens and the opening of the mounting body are zero-fitted (that is, there is no gap between the edge of the lens and the edge of the opening, and the lens is attached to the opening). It is a front view of a part of the room lamp in a state where the room lamp is fitted without any trouble.

In the figure, 1 is a cover as an attachment body, and this cover 1 is substantially rectangular, that is, the length of one short side (upper side) is slightly smaller than the length of the other short side (lower side), and four corners are curved. A rectangular opening 10 is opened, and an engaging recess (not shown) made of a recess or a hole is provided on the inner peripheral surface of the edge of the opening 10.

2 is a lens, and this lens 2 is the opening 10 of the cover 1.
The shape and size are substantially the same as the shape and size, and an engaging projection (not shown) is provided on the outer peripheral surface of the edge of the lens 2 so as to correspond to the engaging recess.

The lens 2 is attached to the cover 1 by fitting the lens 2 into the opening 10 of the cover 1 and engaging the engaging convex portion of the lens 2 with the engaging concave portion of the cover 1.

In the case of such a vehicular lamp, the lens 2 is fitted into the opening 10 of the cover 1 so that the lens 2 can be attached to the opening 10 of the cover 1 without backlash.

On the other hand, from the point of view of function and design, vehicular lamps in which a lens and a switch knob are arranged next to each other in an opening of a mounting body are widely used today. Hereinafter, such a vehicular lamp will be described with reference to FIGS. 7 to 10.

In the figure, the same symbols as in FIG. 5 indicate the same items.

In the figure, reference numeral 11 denotes an engaging recess formed of two recesses or holes provided on the inner peripheral surface of the two long sides (left and right sides) of the edge of the opening 10 of the cover 1.

Reference numeral 3 denotes a lens. The lens 3 has an upper side substantially equal to the upper side of the opening 10, a lower side slightly smaller than the lower side of the opening 10, and two long sides slightly smaller than the two long sides of the opening 10.
Also, the upper two corners are curved almost equally to the upper two corners of the opening 10, and the lower two corners form a substantially right angled rectangle. Of the edges of the lens 3, two engaging projections 31 are provided on the outer peripheral surfaces of the two long sides (both the left and right sides) in association with the engaging recesses 11.

The size of the engaging recess 11 is slightly larger than the size of the engaging protrusion 31.

The lens 3 is attached to the cover 1 by fitting the lens 3 into the opening 10 of the cover 1 and engaging the engaging projection 31 of the lens 3 with the engaging recess 11 of the cover 1. At this time, the opening 10 of the cover 1 and the lens 3 are in a state of zero fitting in the left-right direction (short side direction), but on the other hand, between the lower side of the opening 10 and the lower side of the lens 3. As shown in FIG. 6, a space S is formed in which a switch knob 51 described later is stored.

Reference numeral 4 denotes a housing or a back cover (hereinafter, simply referred to as a housing) which is a part of the mounting body, and the housing 4 has a size substantially equal to the lens 3 when viewed from the front. This housing 4 is attached to the bottom opening 12 of the cover 1.
Attach to. A light source bulb 41, a reflector 42 and the like are arranged in a lamp chamber 40 defined by the housing 4, the cover 1 and the lens 3.

5 is a switch, and this switch 5 is a main body 50 and its main body
It is composed of a switch knob 51 protruding from the protrusion 50.
When viewed from the front, the switch knob 51 has the lens 3 on the upper side.
From the lower side, the lower side is smaller than the lower side of the opening 10, the left and right sides are smaller than the left and right sides of the space S between the lower side of the lens 3 and the lower side of the opening 10, and the upper two corners are substantially right angles. , The bottom two corners are approximately equal to the bottom two corners of the opening 10 and form a curved rectangle. The switch body 50 is attached to the housing 4, and the switch knob 51 is housed in the space S between the lower side of the opening 10 of the cover 1 and the lower side of the lens 3 so that the lens is inserted into the opening 10. 3 and the switch knob 51 are arranged next to each other.

Thus, when the switch knob 51 is pushed, the light source bulb 41 of the lamp including the lens 3 adjacent to the switch knob 51 is turned on or off.

In such a vehicular lamp, since the lens 3 and the switch knob 51 are arranged side by side in the opening 10 of the cover 1, the length of the lens 3 in the longitudinal direction is made slightly smaller than the length of the opening 10 in the longitudinal direction. Therefore, it is necessary to form a space S for accommodating the switch knob 51 between the lower side of the lens 3 and the lower side of the opening 10. For this reason, in the vehicular lamp as shown in FIG. 5, there is no means for restricting the rattling of the lens 3 in the downward direction (toward the adjacent switch knob 51 side).

As a result, as shown in the figure, when the length of the lower side of the lens 3 (side adjacent to the switch knob 51) is slightly larger than or equal to the length of the upper side (side opposite to the side adjacent to the switch knob 51), The lens 3 may shift toward the adjacent switch knob 51 side in the direction of the arrow in FIGS. 6 and 7. If this lens 3 shifts to the switch knob 51 side, the seventh
As shown in FIGS. 8 and 9, the lens 3 and the switch knob
51 and 51 come into contact with each other, making it difficult to smoothly perform the push operation of the switch knob 51, resulting in malfunction of the switch 5.

Therefore, in the case of a vehicle lamp in which the lens 3 and the switch knob 51 are arranged side by side in the opening 10 of the cover 1 as described above, a lens that prevents rattling of the lens 3 toward the switch knob 51 side The mounting structure of is required.

[Problems to be Solved by the Invention] However, in the lens mounting structure in the above-described conventional vehicle lamp, the opening 10 of the cover 1 has the engaging recess 11 and the lens 3 has the engaging recess smaller than the engaging recess 11. The engaging convex portions 31 are provided respectively, and the engaging convex portions 31 are engaged with the engaging concave portions 11 so as to simply prevent the lens 3 from coming off from the opening portion 10. The engaging state between the concave portion 11 and the engaging convex portion 31 is in the free state, and the switch knob of the lens 3
No structure is provided to prevent rattling. For this reason, the lens 3 rattles in the direction adjacent to the switch knob 51, and there is a problem that the above-described malfunction of the switch 5 may occur.

An object of the present invention is to provide a lens mounting structure that prevents rattling of the switch knob of the lens.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a taper for restricting rattling of a lens to a switch knob in at least one of an engaging concave portion and an engaging convex portion. The surface is provided.

[Operation] According to the present invention, when the engaging convex portion is engaged with the engaging concave portion, the taper surface of at least one of the engaging concave portion and the engaging convex portion is formed on the switch knob of the lens. Since rattling is restricted, rattling of the switch knob of the lens can be prevented. Therefore, it is possible to prevent the lens from coming into contact with the switch knob and causing malfunction of the switch.

[Embodiment] An embodiment of a lens mounting structure in a vehicular lamp according to the present invention will be described below with reference to FIGS. 1 to 4.

In the figure, the same reference numerals as those in FIGS. 5 to 10 indicate the same elements.

In the figure, reference numeral 32 denotes a tapered surface, and the tapered surface 32 is provided on each of the two engaging convex portions 31 on the right side of the lens 3 in the direction in which the lens 3 and the switch knob 51 are adjacent to each other. . In this tapered surface 32, the base end of the engaging projection 31 is wide and the tip of the engaging projection 31 is a narrow inclined surface. As shown in FIG. 3, the engaging convex portion 31 provided on the tapered surface 32 is angular and has substantially the same size as the engaging concave portion 11, but the tapered surface 32 is provided. The engaging convex portion 31 which is not formed has a curved corner and is slightly smaller in size than the engaging concave portion 11.

Thus, the engaging convex portion 31 provided with the tapered surface 32 on the right long side of the lens 3 is replaced with the engaging concave portion on the right long side of the opening 10 of the cover 1.
11 and then the lens 3 is fitted into the opening 10, and the engaging convex portion 31 without the tapered surface 32 on the left long side of the lens 3 is fitted into the opening 10 of the cover 1. Engage with the engaging recess 11 on the left long side. Then, the lens 3 is the cover 1
The opening 10 is fitted into the opening 10 in the left-right direction in a state of 0 fitting, and further in the vertical direction (lens 3 and switch knob 51
In the direction (adjacent to), both tapered surfaces 32 of the engaging convex portion 31 on the lens 3 side are in pressure contact with both corners of the engaging concave portion 11 on the opening 10 side. It is possible to regulate the rattling of the switch knob 51 of No. 3. Therefore, the lens 3 comes into contact with the switch knob 51 and the switch 5
It is possible to prevent the occurrence of malfunction of.

In the above embodiment, the engaging convex portion 31 has a tapered surface.
Although 32 is provided, conversely, the engaging concave portion 11 may be provided with a tapered surface, or both the engaging convex portion 31 and the engaging concave portion 11 may be provided with a tapered surface.

Further, in the above-described embodiment, the engaging convex portion 31 on the right long side is formed.
Although the tapered surface 32 is provided in the above, the tapered surface 32 may be provided in the engagement convex portion 31 on the left long side or on the engagement convex portions 31 on both left and right long sides.

Further, in the above-described embodiment, the engaging protrusion is engaged with the lens 3.
31 and the engaging concave portion 11 is provided in the opening 10 of the cover 1, and conversely, the engaging concave portion is provided in the lens 3 again.
10 may be provided with an engaging convex portion, or the lens 3 and the opening 10 may be provided with an engaging convex portion and an engaging concave portion that engage with each other.

Furthermore, in the above-described embodiment, the lens 3 and the opening 10 having a substantially rectangular shape have been described, but the length of the side of the lens 3 adjacent to the switch knob 51 is longer than the length of the opposite side. The present invention can be applied to a lens having a shape, for example, a triangular lens 3 and the opening 10.

[Effects of the Invention] As is apparent from the above, in the lens mounting structure of the vehicle lamp of the present invention, at least one of the engaging concave portion and the engaging convex portion is provided with a rattle for the switch knob of the lens. Since the tapered surface for braking is provided, when the engaging convex portion is engaged with the engaging concave portion, at least one of the engaging concave portion and the engaging convex portion is moved to the switch knob of the lens. Since the rattling is braked, rattling of the lens switch knob can be prevented. Therefore, it is possible to prevent the lens from coming into contact with the switch knob and causing malfunction of the switch.

[Brief description of drawings]

1 to 4 show an embodiment of a lens mounting structure in a vehicular lamp according to the present invention, and FIG. 1 is a partial front view of a room lamp in which a lens is mounted by the mounting structure of the present invention. 2 is a sectional view taken along the line II-II in FIG. 1, FIG. 3 is a sectional view taken along the line III-III in FIG. 1, and FIG. 4 is an enlarged sectional view of a IV portion in FIG. FIG. 5 is a partial front view of the room lamp in which the four sides of the substantially rectangular lens and the opening of the mounting body are zero-fitted. FIG. 6 is a partial front view of the room lamp when the zero fitting between the lower side of the lens and the opening of the mounting body is eliminated. FIG. 7 is a partial front view of a room lamp having a lens attached by a conventional mounting structure, and FIG. 8 is a VIII-V in FIG.
III line sectional view, FIG. 9 is a IX-IX line sectional view in FIG. 7,
FIG. 10 is an enlarged cross-sectional view of the X part in FIG. 1 ... Cover (mounting body), 10 ... Opening part, 11 ... Engaging concave part, 3 ... Lens, 31 ... Engaging convex part, 32 ... Tapered surface,
51 …… Switch knob.

Claims (1)

[Scope of utility model registration request] 1. A mounting body having an opening, a lens and a switch knob arranged adjacently to the opening of the mounting body, and an edge of the opening of the mounting body and an edge of the lens, which are provided to each other. In a vehicular lamp including an engaging recess and an engaging protrusion that engage with each other to attach the lens to the mounting body, in at least one of the engaging recess and the engaging protrusion, the lens A lens mounting structure for a vehicle lighting device, wherein a tapered surface for restricting rattling of the switch knob is provided.