CN2070027U

CN2070027U - Housing for variable resistor

Info

Publication number: CN2070027U
Application number: CN 90207385
Authority: CN
Inventors: 薛美君; 徐策安; 李爱玲; 陈勤德; 严纪萍; 徐文玢; 温上枚
Original assignee: SHANGHAI NO 12 RADIO FACTORY
Current assignee: SHANGHAI NO 12 RADIO FACTORY
Priority date: 1990-06-29
Filing date: 1990-06-29
Publication date: 1991-01-23

Abstract

The utility model relates to a novel housing for a variable resistor, mainly comprising a rotating shaft, a shaft sleeve, a top cover, a bottom cover, a cylinder, etc., wherein, the top cover and the bottom cover are respectively pressed with elastic platy components with round holes; the two longitudinal groove of the cylinder are respectively pressed with two circular convex bodies which form inclined plane shapes, the diameter of the circular convex body is 2 mm, and the distance between the high end of an inclined plane and the lower end of the inclined plane is 0.5 mm. The utility model which adopts the structure above is pressed and is formed by engineering plastic, and therefore, the utility model which has the advantages of easy process, simple assembly, simple repair, no easy damage, and lower cost is used as the housing for any type of variable resistor and any type of resistor.

Description

Housing for variable resistor

The utility model relates to a kind of resistor shell, particularly a kind of variable resistance shell, the parts in addition of genus resistor.

Existing variable resistance with shell mainly by rotating shaft, axle sleeve, collar, top cover, bottom cylinder, compositions such as weld tabs.At present commercially available is exactly the variable resistance shell of this form, and its installation all is to fix or use epoxy resin bonding with screw, lock ring snap ring.Adopting this mode to install not only makes troubles to the operator, and fragile, and manufacturing process is complicated again, and volume is big, and cost is higher.For overcoming the problems referred to above, someone proposes a kind of easy-to-install variable resistance shell, as on cylindrical outer surface, having vertically elongated groove, at top cover, suppress the tabular assembly of two rubber-likes and longitudinal fluting orientation on the bottom respectively, on the inner surface of tabular assembly, be suppressed with and longitudinal fluting projection of a size, like this, during installation, as long as with top cover, the groove that tabular assembly on the bottom is buckled in respectively on the cylinder gets final product, as United States Patent (USP) (patent No.-US4400687)-the be used for shell of variable resistance, the variable resistance shell of this form exactly.But accidentally, with regard to frangibility, therefore, it still has a fly in the ointment during more crisp, thin owing to the tabular assembly of suppressing on top cover, the bottom, the former installation.

The purpose of this utility model provides a kind of novel variable resistance shell, and it is improved in addition on the basis of former United States Patent (USP) (patent No. US4400687).

The utility model is realized as follows: it mainly comprises by rotating shaft, axle sleeve, the top cover that two tabular assemblies of rubber-like etc. are formed, by weld tabs, the guide-localization groove, the bottom of two tabular assembly compositions of rubber-like reaches by weld tabs, the face of cylinder, longitudinal fluting, on cylindrical longitudinal fluting, be suppressed with two circular convex bodys that are the inclined plane in the time of the formations such as cylinder of compositions such as projection respectively, its diameter is slightly less than the width of longitudinal fluting, be about 2 millimeter, differ about 0.5 millimeter between the high-end and low side on inclined plane, at top cover, have a small sircle hole on two tabular assemblies of rubber-like on the bottom, its slightly larger in diameter is in the diameter of circular convex body, be about 2.5～3.00 millimeter, and match.In addition, the circular convex body on the cylinder longitudinal fluting can be an arbitrary shape, and then the small sircle hole on the tabular assembly of rubber-like on top cover, the bottom also can be an arbitrary shape, as long as both match.During installation,, pressed the small sircle hole on the tabular assembly as long as being enclosed within on the circular convex body on the cylinder groove one.

Because the utility model adopts said structure, and is not only easy to operate, is convenient to installation and maintenance, and not fragile, cost is lower.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is an assembling schematic diagram of the present utility model.

Fig. 2 is a structural representation of the present utility model.

Fig. 3 is a cap structure schematic diagram of the present utility model.

Fig. 4 is a bottom cover structure schematic diagram of the present utility model.

Fig. 5 is a cylindrical structure schematic diagram of the present utility model.

In Fig. 1～5: the circular convex body 16 space 17.18-small sircle hole 19.20.21-weld tabs 22-projection 23-guide-localization grooves of the tabular assembly 10-of 1-rotating shaft 2-collar 3-axle sleeve 4-nut 5-packing ring 6-top cover 7-bottom 8.9-cylinder 11.12-face of cylinder 13.14-longitudinal fluting 15.15a-

Shown in Fig. 1 .2, by the face of cylinder 11.12, longitudinal fluting 13.14, projection 22(is all shown in Figure 5) cylinder 10 that constitutes is to adopt phenolic aldehyde molding powder hot forming, its size is by actual required and decide.The diameter on the face of cylinder 11,12 is slightly less than the diameter of cylinder 10, and longitudinal fluting 13.14 on the cylinder 10 and circular convex body 15.15a projection 22 thereon thereof be hot formings thereupon all also.Circular convex body 15.15a is the inclined plane shape, and its diameter outline is about 2 millimeter less than the width of longitudinal fluting 13,14, differs about 0.5 millimeter between the high-end and low side on inclined plane, and projection 22 is that the guide-localization of making bottom 7 is used.The bottom 7, the top cover 6 that have a guide-localization groove 23 in a side are to adopt the engineering plastics press formings, and their slightly larger in diameter is 11,12 diameter in the face of cylinder, and is the same with the diameter of cylinder 10, but both will match.Tabular assembly 8.9 of rubber-like on top cover 6, bottom 7 and the small sircle hole 17,18 that has thereon also are press formings, the diameter of small sircle hole 17,18 is larger than the diameter of

circular convex body

15,15a, about 2.5～3.00 millimeter, but both will match, the width outline of tabular assembly 8,9 is less than the width of longitudinal fluting 13.14, also be suppressed with one big two little round bump (not marking among the figure) in the inner surface center of bottom 7, make to install weld tabs 21 usefulness.

During assembling, with the circular convex body on the groove on the cylinder 10 13 15 aim at top cover 6(at this moment top cover 6 with rotating shaft 1, collar 2, axle sleeve 3, packing ring 5 grades are assembled together and form a sub-assembly) on the tabular assembly 8 of rubber-like on small sircle hole 17 and put after press into getting final product, and then with the projection 22 on the 23 aligning cylinders 10 of the guide-localization groove on the bottom 7, at this moment the small sircle hole on the tabular assembly 9 of the rubber-like on the bottom 7 18 just is enclosed within on the circular convex body 15a naturally, as long as gently once having pressed fix tightly.

Claims

1, a kind of top cover of forming by rotating shaft 1, axle sleeve 3, two tabular assemblies 8 of rubber-like etc. 6 that comprises, by weld tabs 21, guide-localization groove 23, the bottom 7 of two tabular assembly 9 compositions of rubber-like reaches by weld tabs 19,20, the face of cylinder 11,12, longitudinal fluting 13,14, the variable resistance shell that cylinder 10 grades that projection 22 grades are formed constitute is characterized in that;

A. suppress two circular convex body 15,15a that are the inclined plane on two longitudinal flutings 13,13 of cylinder 10 respectively, its diameter is about 2 millimeter less than the width of longitudinal fluting 13,14, differs about 0.5 millimeter between the high-end and low side on inclined plane;

B. have a small sircle hole 17,18 on the tabular assembly 8,9 of two rubber-likes on top cover 6, the bottom 7, its diameter is greater than the diameter of circular convex body 15,15a, about 2.5～3.00 millimeter.

2, by the described variable resistance shell of claim 1, it is characterized in that two circular convex bodys 15,15a suppressing respectively on described two longitudinal flutings 13,14 on cylinder 10 can be arbitrary shapes, the small sircle hole 17,18 that has on the tabular assembly 8,9 of two rubber-likes on top cover 6, the bottom 7 also can be an arbitrary shape.