JPS5854727Y2 - lighting fixtures - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a lighting fixture in which a cap is attached to a base so as to cover a lamp fixedly disposed on the base.

Lighting devices with a structure in which a lamp is fixedly placed on a base and a cap is attached to the base to cover the lamp are used not only as lighting lights for vehicle instrument panels, but also for various control purposes. It is widely used in various directions, such as being mounted on the instrument panel and used as an indicator light.

Conventionally, in this type of lighting fixture, a lamp 12 is attached to a base 11 made of, for example, a synthetic resin material, as shown in FIG.
For example, a cap 1 made of a synthetic resin material is attached to the lamp 12.
3 is arranged to cover this.

An engagement piece 14 is formed on the base 11 so as to protrude in a direction to sandwich the cap 13 from its circumferential surface and serve as a base retaining portion, so that it can be somewhat elastically bent in a direction parallel to the surface of the base 11. Ru.

At the end of the cap 130 on the base 11 side, an engaging portion 16 having an engaging surface 15 on the top side of the cap 13 is provided.
A cap retaining portion is formed to protrude from the circumferential surface of the cap.

These engaging pieces 14 and engaging portions 16 are arranged on the engaging surface 1 with the cap 13 covering the lamp 12 and disposed on the base 11.
5 and the distal end portion of the engaging piece 14 are formed in such a shape that they engage with each other in opposition to each other.

When the cap 13 is pushed into the base 11 side in the inner region of the engagement piece 14 so as to cover the lamp 12, the retention piece 14 is slightly deflected to the outside of the circumferential surface of the cap 13 and engaged. The portion 16 is inserted into the base 11 side of the engagement piece 14 in the inner region of the engagement piece 14 .

In this state, the end of the engagement piece 14 and the engagement surface 15 of the engagement part 16
are elastically opposed and engaged with each other, and the cap 13 covers the lamp 12 and is fixed on the base 11.

However, in this conventional lighting device, the engaging piece 14 formed on the base 11 and the retaining part 16 formed on the cap 13
Even if there is a slight deviation in the shape and dimensions of each part that occurs during manufacturing, this will result in poor installation.

Also, looseness is likely to occur due to dimensional changes caused by aging after installation.

Particularly when this lighting device is used as a lighting light for a vehicle's instrument panel, mechanical deformation due to vibration is likely to occur in the engaging piece 14 and the engaging portion 16 due to vibrations of the vehicle body that occur during driving.

In addition, when this lighting device is used as a lighting light for various instrument panels, the lamp 12 is installed in a limited closed space, so the heat generated by the lamp 12 itself causes the engaging piece 14 and the engaging portion 16 to be damaged. Deformation may occur and looseness may occur.

This invention solves various difficulties in conventional lighting devices of this type, and even if the engaging piece 14 and the engaging part 16 are deformed due to aging, the presence of external vibration, or heating, the rattling due to this deformation can be avoided. The present invention provides a lighting device that can prevent the problem from occurring and maintain a securely installed state.

In this invention, a lamp is attached to a base, a cap engaging part is formed on the peripheral edge of a cap that is disposed to cover the lamp and projects laterally, and a cap engaging part is formed on the base in this cap retaining part. The present invention is applied to a lighting fixture in which the base holding part engages with the lamp, and the cap is fixed to the base.

In this type of lighting device, the cap is attached by integrally forming an engaging piece on the base that can be bent in a direction perpendicular to the surface, and this retaining piece is attached to the edge of the cap on the base side. It is configured such that it elastically engages with an engaging body formed in a portion of the cap so that the cap is biased in the direction of removal.

Therefore, the cap retaining part engages with the base retaining part and is elastically biased toward the base by the base retaining part, while the engaging body of the cap is biased toward the base by the engaging piece formed on the base. is elastically biased to the opposite side.

Therefore, the cap of the lighting fixture is firmly held against the base, and even if the connecting part between the cap and the base is deformed due to aging, external vibration, or heating, this will be absorbed and no rattling will occur. There is no.

Hereinafter, the lighting device of this invention will be explained in detail based on its embodiments using the drawings.

FIG. 3 is a perspective view showing an example of the configuration of the cap 13 used in the lighting device of this invention, and the cap 13 is attached to the base 1.
Two engaging portions 16 are formed facing each other on the peripheral edge of the cap 13 located on the first side, and a portion of the base 11 is formed on the top side of the cap 13 of the retaining portion 16. A retaining surface 15 is formed parallel to the mounting surface.

This engaging portion 16 is formed integrally with the cap 13 so that it can be elastically bent parallel to the base 11.

For this reason, in the embodiment, the retaining part 16
Cut grooves 17-1 and 17-2 are formed along.

A pair of engaging bodies 18 are formed on the peripheral edge of the cap 13 on the base 11 side at positions substantially perpendicular to the axis of the pair of retaining parts 16 so as to protrude toward the base 11 .

A portion of the base 11 is cut and raised into a substantially rectangular shape at a position facing the pair of engaging bodies 18, and the cap 13 is bent in the direction in which the cap 13 is attached to form a pair of retaining pieces 20.

The pair of cut and raised engaging pieces 20 are formed so as to be able to bend elastically in a direction perpendicular to the surface of the base 11.

A cap 13 is pushed toward the base 11 on which a lamp (not shown) is mounted, into an internal area surrounded by a pair of engagement pieces 14 and 20 so as to cover the lamp.

For example, when the lighting device of this invention is used for illuminating an instrument panel, the cap 13 is colored to obtain the desired illumination light.

The pair of retaining pieces 14 are attached to the base 1 as the cap 13 is inserted.
The l pair of retaining parts 16 are biased toward the outside of the cap 13 in parallel with the direction of the cap 13, and each pair of retaining parts 16 passes between the pair of retaining pieces 14 and is located on the base 11 side. The engaging portion 16 and the engaging piece 14 engage with each other while facing the engaging piece 14 .

In this state, the engaging surface 15 of the engaging portion 16 is moved toward the base 11 by the elastic biasing force of the engaging piece 14 as shown in FIG.
A biasing force is given as shown in .

On the other hand, the end surfaces of the engaging bodies 18 are in contact with the ends of the retaining pieces 20, and the elastic biasing force of the retaining pieces 20 applies a biasing force to the engaging bodies 18 in the direction away from the base 11 as shown in FIG. 5 f2. It is being

As described above, in the lighting device of this invention, when the cap 13 is attached to the base 11 so as to cover the lamp (not shown), the engaging portion 16 formed on the cap 13 is attached to the base 11.
A biasing force f1 is applied to the engaging body 18 in the direction toward the base 11, and a biasing force f2 is applied to the engaging body 18 in the direction away from the base 11.

Therefore, the engaging part 16 is given a biasing force in the direction away from the base 11 which is applied to the engaging body 18 via the engaging part 18, and the engaging piece 14 is biased by the engaging part 16 toward the base 11. An elastic biasing force is applied in the direction away from the side.

Therefore, any looseness that occurs between the engagement surface 15 of the retaining piece 14 and the engagement portion 16 due to manufacturing deviations that occur during component manufacturing, aging, application of external vibration, or even heat is absorbed and the engagement portion 16 and the engaging piece 14 can always maintain a firm engagement state.

In FIG. 6, the same reference numerals are given to the same parts to show the structure of the main parts. In this embodiment, a part of the base 11 is formed thin. Push up this thinly formed part toward the cap 13 side and attach the retaining piece 2.
It is set to 0.

In this case, the engagement piece 20 is made of a thin synthetic resin material, for example.
has an elastic biasing force in the direction perpendicular to the base 11 in this portion.

Therefore, in this embodiment as well, a biasing force is applied to the engaging body 18 formed on the cap 13 mounted on the base 11 in a direction away from the base 11 by the retaining piece 20.

In any of the embodiments described above, the peripheral edge of the cap 130 on the base 11 side is cut toward the top of the cap 13 from the end surface position of the engaging body 18 and the engaging portion 16 on the base 11 side. An intermittent portion 22 is formed over the entire circumference.

This intermittent portion 22 releases heat from a lamp (not shown) covered by the cap 13 to the outside, thereby preventing the inside of the cap 13 from becoming abnormally high temperature.

As explained in detail above, according to this invention, the backlash that occurs between the cap retaining part and the base retaining part due to manufacturing deviations of the parts, aging after installation, application of external vibrations, or heating can be avoided. It is possible to provide a lighting fixture that absorbs moisture and maintains its condition even when used under harsh conditions for a long period of time.

Further, the first and second engaging bodies that elastically engage with the first and second retaining pieces, respectively, and the cap retaining portion that engages with the base engaging portion are 90 degrees relative to the axis. 'Since the position is shifted, the cap can be attached to the base in a well-balanced and stable manner.

Note that the specific structure of this invention is not limited to that described in each embodiment, and for example, the engaging body 1 of the cap 13
It is also possible to use a part of the peripheral edge of the cap 13 on the base 11 side as it is as 8, and to form a corresponding part of the base 11 thinly and provide the retaining piece 20.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the structure of the cap of a conventional lighting device, and Figure 2 shows the cap attached to the base on which the lamp is attached, along the line A-A in Figure 1. FIG. 3 is a perspective view showing the configuration of the cap portion of an embodiment of the lighting device of this invention, and FIG. 4 is a cross section taken along line B-B in FIG. 3. figure,
FIG. 5 is a cross-sectional view taken along the line CC in FIG. 3, and FIG. 6 is a cross-sectional view showing the configuration of the main parts of another embodiment of the lighting device of this invention. 11: Base, 12: Lamp, 13: Cap, 14: Engagement piece, 15: Engagement surface, 16: Engagement portion, 18: Engagement body, 2
0: Engagement piece.

Claims (1)

[Scope of utility model registration request] A lamp is attached to a base made of a synthetic resin material, a cap integrally formed of a synthetic resin material is disposed to cover the lamp, and a cap retaining portion is formed on the peripheral edge of the cap to protrude laterally. On the other hand, in a lighting fixture in which a base retaining part formed on the base engages from the top side of the cap so that the cap covers the lamp and is fixed to the base, the base has the When attaching the cap, first and second engaging pieces that can be bent in a direction perpendicular to the surface are integrally formed facing each other, and a portion of the edge of the cap on the base side has a facing part. First and second engaging bodies are formed to protrude toward the base side and are shifted by 90 degrees with respect to the cap retaining portion and the axis, and the first and second engaging bodies are formed to protrude toward the base. The cap is elastically engaged with the first and second retaining pieces, and the cap is biased in the direction of removal, and an intermittent portion is formed between the peripheral edge of the cap on the base side and the base. A lighting fixture characterized by being formed.