JPH0447618Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a housing for a meter such as a motorcycle speedometer or tachometer that is mounted exposed to the outside atmosphere, and particularly to a meter housing having a sealed front protective cover.

As a conventional device of this type, Japanese Utility Model Application Publication No. 123851/1983 has been proposed. This is made by crimp-bonding a U-shaped resin ring to the upper and lower parts of the periphery of an inorganic glass plate, and surrounding the resin ring with an outer case made of resin. However, since this involves sandwiching the periphery of the glass plate with a resin ring and molding a resin outer case to surround the resin ring,
The glass plate has a low air-tightness effect, and the outer case is made of resin, so if it is exposed to the outside atmosphere, brake oil may adhere to the outer case, which deteriorates the resin material of the outer case. There was a problem in that it caused cracks and the like.
As a countermeasure to this problem, metal cases are used for instruments that are installed and used in the external atmosphere, and there is no risk of deterioration even if brake oil is attached to them. An example of this is shown in FIG. 1.

As shown in FIG. 1, the periphery of the opening side of the metal housing 1 is bent vertically outward to form a flange 2, and an illumination light reflecting plate 4 is placed on this flange 2 via a packing 3. Furthermore, a transparent protective cover 6 having a gasket 5 fitted around the periphery so as to cover the opening side of the metal housing 1 is superimposed on the reflector plate 4, and the metal housing 1 and the reflector plate 4 are assembled together. and the protective cover 6 with the metal caulking ring 7.
It is formed by constriction.

However, in the case of the above meter housing, as shown in Japanese Utility Model Publication No. 47-38769, Japanese Utility Model Publication No. 47-36127, and Japanese Utility Model Application Publication No. 54-12455, the tip of the caulking ring 7 is closer to the seal 5. Since it protrudes inward, there is a risk that the tip of the caulking ring 7 will hit the surface of the protective cover 6 and break the protective cover 6 during the crimping process.

The purpose of the present invention is to provide a meter housing that can solve the above-mentioned problems, and its characteristic structure is that a transparent protective cover is sealed and held in a metal meter housing above the meter body. A gasket is fitted over the entire periphery of the protective cover, and an upper edge side fitting portion of a metal ring or an upper edge side fitting portion of a metal instrument housing is provided, which covers the entire periphery of the protective cover by crimping and crimping the packing. The inner circumferential edge of the gasket is horizontally extended and interposed between the end face of the inner edge facing downward of the part to be fitted and the outer surface of the protective cover, and the extended part of the gasket allows the part to be fitted to The reason is that a press-contact part is formed on the end face of the part.

Next, an embodiment based on the above characteristics will be described with reference to the accompanying drawings.

As shown in FIG. 2, the periphery of the opening side of the metal housing 11 is bent vertically outward to form a flange 12, and an illumination beam reflecting plate 14 is placed on top of this flange 12 via a gasket 13. Furthermore, a transparent protective cover 16, which is assembled by fitting a gasket 15 around the periphery of the housing 11 so as to cover the opening side of the housing 11, is superimposed on the reflecting plate 14,
The housing 11, the reflector 14, and the protective cover 16 are formed by tightening with a metal caulking ring 17, and the inner edge of the fitting portion facing downward of the caulking ring 17 is attached to the inside of the upper part of the gasket 15. A thin packing part is extended and interposed between the end face 17a and the outer surface of the protective cover 16, and this extended part is used to press the press contact part 15a of the end face 17a of the inner edge of the fitted part of the metal caulking ring 17. is formed. In this case, as shown in FIG. 3A, when the pressure contact part 15a is formed in a concave shape and the end surface 17a of the inner edge of the fitted part of the caulking ring 17 is pressed against this concave pressure contact part 15a, the fitted part of the caulking ring 17 Patsukin 15 surrounding the tip
3B, or as shown in FIG. 3B, the pressure contact part 15a is formed flat with almost the same width as the end surface 17a of the inner edge of the fitted part of the caulking ring 17, and this flat pressure contact is made. When the end surface 17a of the inner edge of the fitted portion of the caulking ring 17 comes into pressure contact with the portion 15a, the end surface 17a of the inner edge of the fitted portion of the caulking ring 17
The pressure contact part 15a of the seal 15 is made flush with the pressure contact part 15a, or the pressure contact part 15a is extended from the end surface 17a of the inner edge of the fitted part of the caulking ring 17 and further along the outer surface of the protective cover 16 as shown in FIG. 3C. The pressure contact portion 15 is formed as an extended flat flange 15b, and the pressure contact portion 15a is held in pressure contact with the end surface 17a of the inner edge of the fitted portion of the caulking ring 17.
The shape of a may be set appropriately.

FIG. 4 shows another embodiment, in which a protective cover 22 with a packing 21 fitted around the periphery is attached to the reflector tube 2.
3, and the lower part of this reflector tube 23 is supported by a lower metal housing 24, and the circumferential edge of this lower housing 24 and the lower end circumference of the reflector tube 23 are directed outward. The bent flange portions 25 are overlapped, and the fitted portion 27 formed by bending the upper peripheral edge of the upper metal housing 26 inward is attached to the peripheral gasket 21 of the protective cover 22.
At the same time, the overlapping bent portions 25 are crimped at the lower end of the upper housing 26 to secure the three parts together, and the downward inner edge of the fitted portion 27 A thin packing part is extended and interposed between the end surface 27a and the protective cover 22, and this extended packing part forms a pressure contact part 21a of the end surface 27a of the inner edge of the fitted part 27.

FIG. 5 shows a housing of almost the same type as that in FIG. 4, and the vertical width of the packing 31 is larger than that of the packing 21 in FIG. An embodiment is shown in which an end face 37a of the downwardly facing inner edge of the fitted part 37 of the housing 36 is brought into pressure contact with the pressure contact part 31a provided on the packing 31, and the end face 37a and the protective cover A pressure contact portion 31a of the gasket 31 is sandwiched between the gaskets 32.

As mentioned above, in order to seal and hold the transparent protective cover on the metal instrument housing above the instrument body, the present invention involves fitting a gasket around the entire periphery of the protective cover and crimping the gasket. Provide a fitting part on the upper edge side of the metal ring to be coated or a fitting part on the upper edge side of the metal instrument housing,
The inner circumferential edge of the packing is horizontally extended and interposed between the end face of the inner edge facing downward of the metal fitting part and the outer surface of the protective cover, and the extended packing part Since a press-contact part is formed on the end face of the fitted part, compared to a case in which a resin ring is surrounded by a resin case, the sealing of the protective cover is better due to the crimping structure of the packing by the metal fitted part, and the waterproof effect is enhanced. At the same time, the pressure contact part of the packing is interposed between the downwardly facing inner edge end face of the upper edge side fitted part of the metal ring or the upper edge side fitted part of the housing and the outer surface of the protective cover, so it is swaged. There is no risk of the protective cover breaking due to metal contact. Furthermore, since the end face of the inner edge of the fitted portion of the metal ring or metal housing is protected by the packing, it is less likely to rust and any burrs on the end face are covered by the packing, making it possible to improve the appearance. Furthermore, since the housing is made of metal, there is no need to worry about deterioration even if brake oil gets on it.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view showing a conventional meter housing, Fig. 2 is a partial sectional view of a meter housing showing an embodiment of the present invention, Fig. 3A is a sectional view of the main parts of the same, and Fig. 3B and 3C are sectional views of the same as above showing other embodiments, respectively, and FIGS. 4 and 5 are sectional views of the meter housing of the present invention showing other embodiments. 11, 24, 26...Metal housing, 1
5, 21, 31... Patsukin, 15a, 21a,
31a... Pressure contact portion, 16, 22, 32... Protective cover, 17... Metal ring, 17a... End surface of inner edge of fitted part, 27, 37... Fitted part, 27a,
37a... End surface of the inner edge of the fitted part.

Claims (1)

[Scope of utility model registration request] In order to seal the transparent protective cover to the metal instrument housing above the instrument body,
A gasket is fitted around the entire periphery of the protective cover, and an upper edge side fitting portion of a metal ring or an upper edge side fitting portion of a metal instrument housing is provided to cover the entire periphery of the protective cover by crimping and crimping the packing. The inner circumferential edge of the packing is horizontally extended and interposed between the end face of the inner edge facing downward of the fitted part and the outer surface of the protective cover, and the extended packing part protects the end face of the fitted part. A housing for a meter, characterized in that a pressure welding part is formed.