JP2020009534A - Electrical component - Google Patents

Abstract

To provide an electrical component capable of obtaining a stable effect for stopping looseness to a panel.SOLUTION: A switch 10 includes: a main body 14 having a screw part 14f passing through an attachment hole 13 and projected to a back surface 12b side and a flange 14c; a nut 18; and an attachment tool 20 provided between a panel 12 and the nut 18. The attachment tool 20 has: a nut contact board 22 which surrounds the circumference of the screw part 14f and to which the nut 18 is contacted; and a pair of projection boards 24 projecting to a direction of the panel 12 from the nut contact board 22. The projection board 24 includes: a base part 26 connected to the nut contact board 22; and a lever part 32 extended from a connection base end part 30 with the base part 26. The lever part 32 is extended so that a tip is closer to the panel 12 than the connection base end part 30 in a non-screw state of the nut 18, the nut 18 is elastically deformed by being screwed into the screw part 14f, and the tip is contacted to a back surface 12b of the panel 12.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to an electric component mounted in a mounting hole of a panel.

  Some electrical components such as switches, indicator lights, switches with indicator lights, meters, meters, and the like are of a type that can be mounted in mounting holes in a panel. For example, in the operation switch described in Patent Literature 1, a cylindrical portion having a thread portion of a switch body is inserted into a mounting hole of a panel, and a nut is screwed into the thread portion to tighten. A washer is interposed between the screw portion and the back surface of the panel. When attaching the electric component to the panel, it is desirable to provide a means for preventing the electric component from loosening after the attachment due to vibration, impact, aging (deterioration of resin) and the like.

  FIG. 9 shows a conventional panel-mounted operation switch 500. In the operation switch 500, the main body 504 projects from the mounting hole 502a of the panel 502 to the rear surface side. The main body 504 is provided with a screw portion 504a, and a nut 506 is screwed into the screw portion 504a. A U-shaped fitting 508 is interposed between the panel 502 and the nut 506. In the operation switch 500, a radial groove portion 508a is provided on the surface of the attachment 508 with which the nut 506 contacts, and the contact portion 506a is deformed by tightening the nut 506, thereby serving as a means for preventing loosening. The nut 506 is made of resin.

JP 2008-108537 A

  In the operation switch 500 described above, the depth and the shape of the groove 508a must be accurately formed in order to exert an appropriate loosening prevention effect. When the nut 506 is repeatedly tightened, the contact portion 506a with respect to the groove portion 508a is repeatedly deformed according to the number of times of attachment, and the amount of deformation is increased, so that there is a concern that a stable loosening prevention effect cannot be maintained. there were. In addition, the groove 508a needs to be made of a high-hardness material, and the mating material to be brought into contact with the material has to be made of a softer material.

  The present invention has been made in view of the above problems, and has as its object to provide an electric component capable of obtaining a stable slack preventing effect on a panel regardless of the number of times of mounting, vibration, impact, and aging.

  In order to solve the above-described problems and achieve the object, an electric component according to the present invention includes a screw portion that protrudes to the back side through a mounting hole of a panel and an engaging portion that engages with a surface of the panel. A body, a nut screwed into the screw portion, and a fixture provided between the panel and the nut, wherein the fixture surrounds the screw portion and abuts against the nut. A plate, and a pair of projecting plates projecting from the nut contact plate in the direction of the panel, wherein the projecting plate has a base portion connected to the nut contact plate and a connection base end of the base portion. And a lever portion extending from the portion, wherein the lever portion extends such that a tip thereof is closer to the panel than the connection base end portion when the nut is not screwed, and When the joint is engaged with the surface of the panel, the nut is Tip is elastically deformed by being threaded into the serial thread portion, characterized in that in contact with the back surface of the panel.

  A first panel abutment provided at a tip of the lever portion and protruding toward the panel may be provided.

  A second panel abutment provided at the connection base end and protruding toward the panel may be provided.

  A lever support projection provided on one of the base portion and the lever portion and projecting toward the other may be provided.

  One or two lever portions may be provided for one protruding plate, and the total length including the connection base end portion may be set equal to the total length of the protruding plate.

  The lever portion may have a bent portion folded back into a U-shape.

  Even if two lever portions are provided for one projecting plate, a third panel abutment protruding toward the panel is provided between the two lever portions on the projecting plate. Good.

  In the electric component according to the present invention, the nut is screwed into the screw portion in a state where the engaging portion is engaged with the surface of the panel, so that the lever portion is elastically deformed, and the tip comes into contact with the back surface of the panel. ing. As a result, play due to the number of times of attachment, vibration, impact, and aging is suppressed, and a stable loosening prevention effect on the panel is obtained.

FIG. 1 is an exploded perspective view of the switch according to the embodiment. FIG. 2 is a plan view of the switch according to the embodiment. FIG. 3 is a perspective view of the attachment. FIG. 4 is a plan view showing a state before the nut is tightened in the step of attaching the switch to the panel. FIG. 5 is a plan view showing a state in which a nut is being tightened in a step of attaching the switch to the panel. FIG. 6 is a perspective view of a fixture according to a first modification of the fixture. FIG. 7 is a perspective view of a fixture according to a second modification of the fixture. FIG. 8 is a perspective view of a fixture according to a third modification of the fixture. FIG. 9 is an exploded perspective view of a conventional operation switch.

  Hereinafter, an embodiment of an electric component according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited by the embodiment.

  FIG. 1 is an exploded perspective view showing a switch 10 which is an embodiment of an electric component according to the present invention. FIG. 2 is a plan view of the switch 10. The switch 10 is mounted in the mounting hole 13 of the panel 12, and has a main body 14, a packing 16, a nut 18, and a mounting tool 20. In FIG. 1, the exposed side of the panel 12 is referred to as a front surface 12a, and the opposite side is referred to as a back surface 12b. The direction of the front surface 12a is defined as the front, and the direction of the back surface 12b is defined as the rear with respect to the panel 12. The mounting hole 13 is rectangular.

  As shown in FIGS. 1 and 2, the main body 14 has a front operation section 14 a and a rear contact section 14 b. The operation portion 14a has a flange (engaging portion) 14c disposed at the forefront, an operation surface 14d of a portion surrounded by the flange 14c, and a box portion 14e projecting rearward from the flange 14c. The flange 14c has a rectangular shape slightly larger than the mounting hole 13, and is a portion that engages with the surface 12a via the packing 16. The amount of protrusion of the flange 14c from the surface 12a is small. The box portion 14e is a box having a rectangular cross section, is a portion that is inserted into the mounting hole 13 and protrudes rearward, and has a slightly smaller cross-sectional area than the mounting hole 13. The box portion 14e is thick enough to secure the amount of pushing movement of the operation surface 14d, and is sufficiently thicker than the panel 12. Further, as another embodiment of the electric component, for example, in the case of an indicator light (not shown), a light emitting body may be provided in a portion corresponding to the box portion 14e.

  The contact portion 14b has a contact provided therein in conjunction with a switch operation on the operation surface 14d. The contact portion 14b projects further rearward from the box portion 14e, and has a columnar shape. The diameter of the contact portion 14b is slightly smaller than the shortest side of the box portion 14e. A screw portion 14f is provided on a peripheral surface of substantially the front half of the contact portion 14b. The screw portion 14f is provided with two cut surfaces 14g. Two terminals 14h are provided at the rearmost point of the contact portion 14b.

  The packing 16 has a rectangular shape conforming to the rear surface of the flange 14c, and is formed to be appropriately thin.

  The nut 18 is a cylindrical component screwed into the screw portion 14f. On the peripheral surface of the nut 18, a large number of fine vertical grooves for preventing slippage are provided.

  As shown in FIG. 3, the fixture 20 includes a nut contact plate 22 surrounding the screw portion 14 f and contacting the nut 18, and a pair of projecting plates 24 projecting forward from the nut contact plate 22. Having. The pair of projecting plates 24 are parallel, and oppose each other above and below the nut contact plate 22. The nut contact plate 22 has a hole 22a into which the screw portion 14f is inserted. The hole 22a is provided with a flat portion 22b corresponding to the cut surface 14g, which defines the direction with respect to the main body 14 and prevents rotation. The attachment 20 and the nut 18 can be made of a resin material or a metal material, and each has a small limitation on hardness.

  Each of the pair of projecting plates 24 has a base portion 26 connected to the nut contact plate 22 and two lever portions 32 connected to the base portion 26 at a central connection base end portion 30. The two lever portions 32 are symmetrical about the connection base end portion 30 and have good balance. The lever portion 32 can be bent and elastically deformed with the connection base end portion 30 as a fulcrum. Further, the total length of the two lever portions 32 including the connection base end portion 30 is equal to the total length of the protruding plate 24, and the lever portion 32 is sufficiently long. Thereby, the lever part 32 becomes a leaf spring shape and has a shape suitable as an elastic body. In order to secure a sufficient length, the number of the lever portions 32 may be one or two per one protruding plate 24. A slit 34 is formed between the base 26 and the lever 32. The lever portion 32 extends from the connection base end portion 30 toward both ends of the protruding plate 24, but before assembly, the tip is closer to the panel 12 than the connection base end portion 30 when the nut 18 is not screwed. So slightly inclined.

  The lever portion 32 is inclined in the direction of the panel 12 when the nut 18 is not screwed in, and elastically deforms when the nut 18 is screwed into the screw portion 14f to narrow the slit 34.

  A first panel contact 36 protruding toward the panel 12 is provided at the tip of the lever portion 32. The connection base end 30 is provided with a second panel contact 38 protruding toward the panel 12.

  On both ends of the base portion 26, lever support protrusions 40 protruding toward the panel 12 are provided. The lever support projection 40 is arranged to face the rear surface of the first panel contact 36 via the slit 34. As will be described later, the second panel abutment 38 and the lever support protrusion 40 serve as an elastic deformation restricting portion that restricts the elastic deformation of the lever portion 32 by a certain amount.

  A narrow flat surface is provided at the top of each of the first panel abutment 36, the second panel abutment 38, and the lever support projection 40. The flat surface of the second panel abutment 38 is approximately twice as large as the flat surfaces of the first panel abutment 36 and the lever support projection 40.

  Next, a process of attaching the switch 10 thus configured to the panel 12 will be described.

  First, the packing 16 is fitted to the rear surface of the flange 14c, and in that state, the contact portion 14b is inserted into the mounting hole 13 and protruded rearward (see FIG. 1). As shown in FIG. 4, the flange 14c engages the surface 12a via the packing 16.

  Next, the fitting 20 is fitted into the screw portion 14f, and the nut 18 is further fitted into the contact portion 14b. At this time, in the attachment 20, only the four first panel contact members 36 are in contact with the back surface 12b of the panel 12, the second panel contact member 38 is separated from the back surface 12b, and the lever support protrusion 40 is It is separated from the lever part 32. The pair of projecting plates 24 are arranged so as to cover two side surfaces of the box portion 14e. The nut abutment plate 22 is arranged at a position slightly away from the rear surface of the box portion 14e and does not interfere. Thus, the space of the box portion 14e is ensured by the pair of projecting plates 24.

  Thereafter, as shown in FIG. 5, the nut 18 is screwed into the screw portion 14f. The nut 18 is displaced by screwing, and pushes out the fixture 20 forward. Thus, the four lever portions 32 are elastically deformed with the connection end with the connection base end portion 30 as a fulcrum, and the width of the slit 34 is reduced.

  As shown in FIG. 2, when the nut 18 is tightened, the lever portion 32 is elastically deformed from the state of the imaginary line to the state of the solid line. Then, the second panel contact 38 contacts the rear surface 12b, and the lever support projection 40 contacts the rear surface of the end of the lever 32. In this way, the elastic deformation of the lever portion 32 is limited, and the mounting fixture 20 is no longer displaced forward, and the tightening of the nut 18 is completed. That is, the second panel abutment 38 and the lever support protrusion 40 function as an elastic deformation limiting portion that limits the elastic deformation of the lever portion 32 by a certain amount.

  As described above, in the switch 10, since the lever portion 32 is elastically deformed between the back surface 12b of the panel 12 and the base portion 26, a spring load is always applied, and the influence of vibration, impact, and aging is suppressed. A loosening prevention effect that prevents backlash is obtained. The elastic deformation of the lever portion 32 is performed by tightening the nut 18 by screwing, and the assembling process is simple. Since the lever portion 32 is appropriately long, the tightening state of the nut 18 can be visually confirmed by the amount of elastic deformation. Further, the tightening state of the nut 18 can be easily confirmed by, for example, the lever support protrusion 40 abutting on the lever portion 32 as shown by a position P. This makes it possible to omit torque management using a torque wrench or the like.

  Furthermore, the locking of the switch 10 is based on the elastic deformation of the lever 32, and there is basically no plastic deformation, so that the locking effect is not reduced regardless of the number of times of attachment to the panel 12. , A stable anti-loosening effect is obtained.

  The bending elastic deformation of the lever portion 32 is limited by an appropriate amount by the second panel abutment 38 and the lever support protrusion 40. Further, since the nut 18 cannot be screwed any more, the operator recognizes the end of the tightening. Can be. Also, when the nut 18 is tightened by an automatic machine, proper tightening can be performed by torque management. However, even after the bending elastic deformation of the lever portion 32 is limited in this way, the nut 18 may be slightly tightened by slightly elastically compressing any portion (for example, the base portion 26). The attachment 20 is supported on the panel 12 by the two second panel contact members 38 and the lever support projections 40 at the four corners, so that the attachment 20 is stabilized. The attachment 20 has a simple configuration and is low in cost, and is easy to manufacture because no precision groove is required.

  The attachment 20 may be replaced with, for example, the attachment 20a shown in FIG. 6, the attachment 20b shown in FIG. 7, or the attachment 20c shown in FIG. In the fixtures 20a, 20b, and 20c, the same components as those of the fixture 20 are denoted by the same reference numerals, and detailed description thereof will be omitted. For the components related to the protruding plate 24 and similar to the components in the fixture 20, a is added to the reference numeral in the fixture 20a, b is added to the reference numeral in the fixture 20b, and c is added to the reference numeral in the fixture 20c. I do.

  As shown in FIG. 6, in the fixture 20a according to the first modification, each protruding plate 24 has two lever portions 32a. The lever portion 32a is connected to the base portion 26 at connection base ends 30a at both ends of the protruding plate 24. The lever portion 32a is elastically deformable. The two lever portions 32a are connected at the center position of the protruding plate 24, and the connection portion is provided with a first panel contact 36a protruding toward the panel 12. The connection base end 30a is provided with a second panel abutment 38a protruding toward the panel 12. The two lever portions 32a are symmetrical about the connection portion and have good balance. The total length of the two lever portions 32a including the connection base end portion 30a is equal to the total length of the protruding plate 24, and the lever portion 32a is sufficiently long. A slit 34a is formed between the base 26 and the lever 32a. The lever portion 32a extends from the connection base end portion 30a toward the center of the protruding plate 24. However, in a state before assembly, that is, in a state in which the nut 18 is not screwed, the front end is closer to the panel 12 than the connection base end portion 30a. It extends slightly inclined so as to be closer. The lever portion 32a is elastically deformed by the nut 18 being screwed into the screw portion 14f, and the leading end comes into contact with the back surface 12b of the panel 12.

  Such an attachment 20a can be applied to the switch 10 instead of the attachment 20 described above. In this case, in the assembling process, first, the first panel contact 36a contacts the back surface 12b. The four lever portions 32a are elastically deformed with the connection end with the connection base end portion 30a as a fulcrum while being slightly compressed by the tightening of the nut 18, so that the width of the slit 34a is narrowed, and the second panel contact member 38a is eventually formed. Also comes into contact with the back surface 12b, and the tightening of the nut 18 is completed. The attachment 20a may be provided with a lever support protrusion 40a as shown by a virtual line to support the back portion of the first panel contact 36a when the tightening of the nut 18 is completed.

  As shown in FIG. 7, in the fixture 20b according to the second modification, each projecting plate 24 has one lever portion 32b. The lever 32b is connected to the base 26 at a connection base 30b at one end of each protruding plate 24. The lever portion 32b is elastically deformable. The lever portion 32b extends toward the other end of the protruding plate 24, and the other end is provided with a first panel abutment 36b protruding toward the panel 12. The connection base end portion 30b is provided with a second panel abutment 38b protruding toward the panel 12. The two lever portions 32b provided by the attachment 20b extend in opposite directions to each other with a pair of protruding plates 24, and are well balanced. The total length of one lever portion 32b including the connection base end portion 30b is equal to the total length of the protruding plate 24, and the lever portion 32b is sufficiently long. A slit 34b is formed between the base 26 and the lever 32b. The lever portion 32b extends from the connection base end portion 30b toward the other end, but is slightly inclined in the direction of the panel 12 before assembly.

  An auxiliary contact 42 protruding toward the panel 12 is provided at a central position of the lever portion 32b. On the back side of the first panel abutment 36b in the lever portion 32b, a lever support protrusion 40b protruding toward the base portion 26 is provided. The lever support protrusion 40b may be provided on the base portion 26 side.

  Such an attachment 20b can be applied to the switch 10 instead of the attachment 20 described above. In this case, in the assembling process, first, the first panel contact 36b contacts the back surface 12b. Then, by tightening the nut 18, the two lever portions 32b are elastically deformed with the connection end with the connection base end portion 30b as a fulcrum, and the width of the slit 34b is narrowed. Then, the tightening of the nut 18 is completed. At this time, the lever support projection 40b contacts the end of the base 26, and the auxiliary contact 42 contacts the back surface 12b.

  In the attachment 20b, the lever portion 32b extends along one base portion 26 connected at the connection base end portion 30b. It may extend to the end. In this case, the lever support protrusion 40b comes into contact with the end face of the other base portion 26.

  As shown in FIG. 8, in the fixture 20c according to the third modification, each projecting plate 24 has two lever portions 32c. Each lever portion 32c is connected to the base portion 26 at the connection base end portions 30c at both ends of the protruding plate 24, and extends from the connection base end portion 30c toward the center, and further has a bent portion 43 folded back into a U-shape. The shape returns to both ends of the protruding plate 24 through the protruding plate 24. A first panel contact 36 c protruding toward the panel 12 is provided at the tip of the lever portion 32. The lever portion 32c is elastically deformable. The connection base end portion 30c is provided with a lever support protrusion 40c protruding toward the panel 12. At the center of the protruding plate 24, a third panel abutment 44 protruding toward the panel 12 is provided between the two lever portions 32c.

  In such an attachment 20c, since the lever portion 32c has a shape folded back by the bent portion 43, a sufficient length is secured, and the amount of elastic deformation per unit length can be reduced. Therefore, even if two lever portions 32c are provided, there is a margin in the width direction, and the third panel contact member 44 provided at the central portion can be enlarged. The third panel contact 44 is large and stably contacts the panel 12.

  According to the attachments 20a, 20b, and 20c, the levers 32a and 32b are elastically deformed at the time of attachment to the panel 12, similarly to the attachment 20 described above, so that the play due to the number of attachments, vibration, impact, and aging is suppressed. As a result, a stable loosening prevention effect is obtained.

  The present invention is not limited to the above-described embodiment, and can be freely modified without departing from the gist of the present invention.

10 Switches (electric parts)
12 Panel 12a Front surface 12b Back surface 13 Mounting hole 14 Main body 14f Screw portion 14c Flange (engagement portion)
16 Packing 18 Nut 20, 20a, 20b, 20c Fixture 22 Nut abutment plate 24 Projection plate 26 Base 30, 30a, 30b, 30c Connection base end 32, 32a, 32b, 32c Lever 34, 34a, 34b, 34c Slits 36, 36a, 36b, 36c First panel abutment 38, 38a, 38b Second panel abutment 40, 40a, 40b Lever support protrusion 42 Auxiliary abutment 43 Bending portion 44 Third panel abutment

Claims (7)

A screw portion protruding to the back side through the mounting hole of the panel, and a main body including an engaging portion engaging with the surface of the panel;
A nut screwed into the screw portion,
A fixture provided between the panel and the nut,
Has,
The mounting fixture is
A nut contact plate surrounding the screw portion and contacting the nut,
A pair of projecting plates projecting from the nut contact plate in the direction of the panel,
Has,
The projecting plate is
A base portion connected to the nut contact plate,
A lever portion extending from a connection base end portion with the base portion,
Has,
The lever portion extends such that a tip thereof is closer to the panel than the connection base end portion in a non-threaded state of the nut, and the lever is engaged with the engagement portion on a surface of the panel. An electric component, wherein a nut is elastically deformed by being screwed into the screw portion, and a tip of the nut is in contact with a back surface of the panel. The electrical component according to claim 1,
An electric component, comprising: a first panel abutting member provided at a tip of the lever portion and protruding toward the panel. The electric component according to claim 1 or 2,
An electric component, comprising: a second panel abutment provided at the connection base end and protruding toward the panel. The electric component according to any one of claims 1 to 3,
An electric component, comprising: a lever support projection provided on one of the base portion and the lever portion and projecting toward the other. The electric component according to any one of claims 1 to 4,
The electric part, wherein one or two lever portions are provided for one of the protruding plates, and a total length including the connection base end portion is equal to a total length of the protruding plate. The electric component according to any one of claims 1 to 4,
The electric part, wherein the lever part has a bent part folded back into a U-shape. The electrical component according to claim 6,
The two lever portions are provided for one projecting plate,
An electrical component, wherein a third panel abutment protruding toward the panel is provided between the two lever portions of the protruding plate.

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