JPH1092255A - Operation switch turning stop structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide turning stop structure capable of simply recovering a turning stop function even when a lock nut is loosened, eliminating troublesome fixing means on the back side of a fixing panel, remarkably enhancing fixing workability, and mechanically obtaining the turning stop function independent of the lock nut. SOLUTION: A longitudinal groove 3 extending in the axial core direction by cutting a screw part 2 is formed in an operation part main body 1. A notch 9 is formed in the hole edge part of a fixing hole 8 of a fixing panel 7. A ring-shaped turning stop member 20 is interposed between a flange part 4 of the operation part main body 1 and the surface side of the fixing panel 7 by inserting the screw part 2 into an insertion hole 21. The turning stop member 20 has locking projection parts 22, 23 projecting inward from the hole edge part of the insertion hole 21 and fitting to the longitudinal groove 3, a locking projection 24 projecting sideward from the hole edge part of the insertion hole 21 and fitting to the notch 9, and a waterproof sealing member integrally formed along the peripheral part and pressed against at least the fixing panel 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a twisting operation such as a selector switch for selecting a function by a twisting operation and a push lock turn reset switch which is locked in an ON state by a pressing operation and is unlocked by the twisting operation. The present invention relates to a detent structure for an operation switch that requires a switch.

[0002]

2. Description of the Related Art Generally, various operation switches are operated by inserting a main body of an operation part into a mounting hole of a mounting panel from a front side thereof so that a flange portion comes into contact with a surface of the mounting panel and operating from a rear side of the mounting panel. By screwing and fastening the lock nut to the screw portion of the body, the mounting panel is mounted in a state where the mounting panel is sandwiched between the flange portion and the lock nut. Therefore, the mounting hole of the mounting panel through which the cylindrical body portion having the threaded portion in the operation portion main body is inserted is necessarily circular. Therefore, when mounting an operation switch that requires a twisting operation, it is necessary to prevent the operation unit main body from rotating around the mounting panel. As this detent structure, there has been conventionally known a configuration in which a projection protruding downward is provided on the back surface of the flange portion, and a fixing hole into which the projection is fitted is formed in the mounting panel. Also, in many cases, after the operation switch is mounted on the mounting panel, a marking sticker is provided near the operation switch to display the content of the operation switch.

However, in the above-described detent structure, since a space for providing the projection is required, the shape of the flange portion becomes large, and there is a saving in use and design. Further, it is necessary to provide a mounting hole and a fixing hole in the mounting panel, and there is a disadvantage that processing of the mounting panel is troublesome and time-consuming. Therefore, a detent structure as shown in FIG. 10 that does not require a projection or a fixing hole has been proposed (see Japanese Utility Model Publication No. 6-12575).

The above detent structure has two (only one is shown) longitudinal grooves 3 formed along the axis of the operating portion main body 1 so as to cut off the screw portion 2 in the cylindrical operating portion main body 1. And a notch 9 formed in a part of the circular mounting hole 8 of the mounting panel 7 at the edge of the hole, and a washer 10. Washer 1
Reference numeral 0 denotes a ring shape having a round hole having an inner diameter through which the screw portion 2 can be inserted, and two cut-and-raised portions 11 that fit into the vertical grooves 3 from the edges of the round hole, and fit into the notches 9. One cut-and-raised portion 12 is provided so as to protrude. The operation switch has an operation section 14 rotatably mounted on one end of the operation section main body 1 and a switch unit 13 connected to the other end of the operation section main body 1.

When mounting the operation switch on the mounting panel 7, first, the operation unit main body 1 is detached from the switch unit 13 and the waterproof packing 17 is inserted and mounted. The left side) is inserted into the mounting hole 8 and the flange portion 4 is pressed against the surface of the mounting panel 7. Next, the washer 10 is positioned so that the two cut-and-raised portions 11 are fitted into the vertical grooves 3, inserted into the operation section main body 1 from the back side of the mounting panel 7, and the cut-and-raised 12 is cut into the mounting panel 7. The lock nut 18 is screwed into the screw portion 2 and fastened while maintaining the state. As a result, the operating portion main body 1 is integrated with the washer 10 in the direction around the axis by fitting the cut-and-raised portion 11 with the vertical groove 3.
The operation unit main body 1 is fixed to the mounting panel 7 through the washer 10 by fitting the
The rotation is restricted to prevent rotation. A storage sticker 61 is provided near the operation switch provided on the mounting panel 7.

[0006]

However, the above detent structure has problems in all aspects of the operation function, the mounting workability and the standard. That is, in terms of function, if the lock nut 18 is loosened due to vibration or impact, the cut-and-raised portion 12 comes out of the notch 8 and the rotation preventing function is lost. Here, since the washer 10 as a detent member is present on the back surface side of the mounting panel 7, even if the operation part 14 is twisted while being pulled or pushed, the idle rotation is performed on the front surface side of the mounting panel 7. Just do it. The recovery of the rotation preventing function is performed by turning the lock nut 18 around the rear surface of the mounting panel 7 and retightening the lock nut 18, so that it takes too much time. In contrast,
Since the loss of the detent function usually occurs unexpectedly, when the operation of the system needs to be stopped urgently, the operation part 14 cannot be twisted on the front surface side of the mounting panel 7, so that the emergency operation is performed. There is a problem that cannot be addressed immediately.

[0007] In terms of mounting workability, after inserting the operation section main body 1 into the mounting hole 8 from the front side of the mounting panel 7, mounting the washer 10 and tightening the lock nut 18 from the back side of the mounting panel 7. However, since the back surface of the mounting panel 7 is generally narrow and cramped with many wires, the workability is poor. Moreover, on the back side of the mounting panel 7 having poor workability, the washer 10 is cut and raised, and the cut and raised 11 is aligned with the vertical groove 3 and inserted into the operation section main body 1 with the washer 12 positioned above. While turning the unit 10 integrally with the operation unit body 1, the cut-and-raised unit 12 is removed from the panel 7.
It is necessary to perform a difficult work of positioning and fitting into the notch 8 of the head. In addition, prior to inserting the washer 10 into the operation unit main body 1, it is necessary to confirm whether or not the operation unit main body 1 is in the proper orientation on both the front and back surfaces of the mounting panel 7. Furthermore, since the washer 10 is not temporarily fixed only by being inserted through the operation unit main body 1, the lock nut 18 is not provided.
Before fastening, the cut-and-raised portion 12 may be disengaged from the notch 9 and the operating portion main body 1 may be displaced. If the cut-and-raised portion 12 is again aligned with the notch 9 and inserted again, No. As described above, the operation switch having the above-described rotation preventing structure has extremely poor workability.

Further, in fixing the member, the friction means alone is not sufficient, and it is desired that the member is stopped by a mechanical structure.
Is locked only by the lock nut 18 stopped by friction, and the rotation of the lock nut functions when the washer is fixed. Therefore, it cannot be said that the function is sufficient.

[0009] In addition, in the case of the operation switch, after the operation switch is mounted on the mounting panel, a storage sticker indicating the content of the operation switch is often provided in the vicinity of the operation switch. Become.

Therefore, the present invention makes it possible to easily recover the rotation preventing function even when the lock nut is loosened, eliminates difficult mounting means on the back side of the mounting panel, and significantly improves the mounting workability. It is an object of the present invention to provide an operation switch detent structure that can mechanically obtain a detent function without relying only on a lock nut and can simplify the operation of disposing a memorized seal. .

[0011]

In order to achieve the above-mentioned object, an anti-rotation structure for an operation switch according to the present invention comprises an operation part for twisting operation and a flange connected from the operation part to the rear side. The operation unit main body of the operation switch having the screw part and the operation part is inserted into the circular mounting hole of the mounting panel from the front side, and a lock nut is screwed into the screw part from the rear side of the mounting panel. A fastening structure for the operation switch, wherein the mounting panel is sandwiched between the front and back surfaces by the flange portion and the lock nut, and is attached to the operation portion main body. A vertical groove extending in the direction, a notch is formed in a hole edge of the mounting hole, and the screw portion is inserted into the insertion hole, and is provided between the flange portion and the front surface side of the mounting panel. Ring-shaped The locking member includes a locking member, the locking member protrudes inward from the hole edge of the insertion hole and fits into the vertical groove, and protrudes laterally from the hole edge of the insertion hole. A locking projection fitted into the notch; and a waterproof sealing member provided integrally along the peripheral edge and pressed at least against the mounting panel.

[0012] In this rotation preventing structure of the operation switch, the operation unit body is mounted on the screw portion of the operation unit main body with the rotation preventing member fitted in the vertical groove with the locking protruding portion, and the operation unit main body is viewed from the front side of the mounting panel. When the locking projection is inserted into the notch by being inserted into the mounting hole, the operation portion main body is prevented from rotating by the mounting panel via the rotation preventing member. It is only necessary to screw and fasten the lock nut from the back of the mounting panel. Therefore, the mounting workability is remarkably improved. Also, in terms of function, even if the lock nut is loosened and the locking projection comes out of the notch,
On the front side of the mounting panel, if the operation part is pushed to the back side and the locking projection is fitted into the notch, the detent function is immediately restored, and the emergency operation is performed by twisting with the operation part pressed. Can respond to. As described above, the fixing of the detent member does not depend only on the lock nut, and the detent functions mechanically by pressing the operation unit against the rear side.

In a preferred embodiment of the present invention, an annular groove is formed along a peripheral portion of the detent member, and the seal member is fitted by any one of fitting, insert molding, sticking or coating. The seal member is provided integrally with the annular groove, so that the seal member can be easily and reliably integrated with the detent member.

Further, in another preferred embodiment of the present invention, the seal member is joined to both surfaces of the detent member and provided integrally on a peripheral portion, whereby the detent member and the flange portion are connected to each other. There is no need to interpose an existing waterproof packing between them, and the mounting height of the operation unit from the mounting panel can be reduced accordingly.

Further, in another preferred embodiment of the present invention, a name plate mounting portion is integrally formed on a peripheral portion of the rotation preventing member, and a name plate mounting recess is formed on a base of the name plate mounting portion. A pair of side walls of the recess are formed with a name plate locking portion, and a pressing piece is formed on the bottom surface of the recess to press the name plate toward the front side. Since the nameplate mounting portion is formed, the nameplate is provided at the same time that the rotation preventing member is provided on the operation switch, so that the mounting operation can be easily performed.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded side view in which main parts of an operation switch having a rotation preventing structure according to an embodiment of the present invention are cut and shown. 7, the same or substantially the same components as those in FIG. 7 are denoted by the same reference numerals to simplify the description and facilitate the understanding, and the duplicated description will be omitted. Will be described.

As is apparent from the arrangement shown in FIG. 1, the detent member 20 is attached to the operation portion main body 1 on the front side (left side in the figure) of the mounting panel 7 and is shaped to engage with the mounting panel 7. I have. 2A to 2C show a front part, a side view, and a rear view of the rotation preventing member 20, respectively. FIG. 3 is a front view of the mounting panel 7. The mounting panel 7 has a circular mounting hole 8 having an inner diameter through which the screw portion 2 of the operation unit body 1 can be inserted, and a hole edge of the mounting hole 8. And a notch 9 formed in a predetermined portion of
The detent member 20 has a ring shape having a circular insertion hole 21 having an inner diameter through which the screw portion 2 can be inserted, and is formed from two hole edges radially opposed to the insertion hole 21. A pair of locking projections 22 and 23 projecting inward,
A locking projection 24 projecting laterally from one locking projection 22
And an annular groove 27 formed along the periphery on the surface on the side of the mounting panel 7. Both locking projections 22,2
Reference numeral 3 denotes a shape that can be fitted into the vertical groove 3 of the operation section main body 1. The locking projection 24 has a shape that can fit into the notch 8 of the mounting panel 7. A waterproof sealing member 28 is provided inside the annular groove 27.

FIG. 4 is a plan view of the operation switch mounted on the mounting panel 7, and FIG. 5 is an enlarged vertical sectional view showing a structure for preventing rotation of the operation switch.
The switch unit 13 is omitted. Next, a procedure for mounting the operation switch having the above-described rotation preventing structure on the mounting panel 7 will be described. First, the waterproof packing 17 and the detent member 20 are attached to the operation unit main body 1. The rotation preventing member 20 is attached by inserting the screw portion 2 of the operation portion main body 1 while positioning and engaging the both locking projections 22 and 23 in the vertical groove 2. The operation unit main body 1 of the detent member 20
Since the mounting operation to the mounting panel 7 is performed on the front side of the mounting panel 7, the positioning can be easily performed.

Subsequently, the operation unit main body 1 to which the waterproof packing 17 and the detent member 20 are mounted is inserted into the mounting hole 8 of the mounting panel 7, and the locking projection 24 is fitted into the notch 9 of the mounting panel 7. The positioning of the locking projection 24 in the notch 9 can be easily performed on the front surface side of the mounting panel 7.
With the flange part 4 in contact with the surface of the mounting panel 7, the lock nut 18 is screwed from the back side of the mounting panel 7 to the screw part 2.
Then, the operation unit main body 1 is completely mounted on the mounting panel 7. As described above, since the work to be performed on the back side of the mounting panel 7 with poor workability is only the tightening of the lock nut 18, the mounting workability is remarkably improved as compared with the conventional detent structure.

In the above mounting state, the lock nut 1
If the hook 8 is loosened by vibration or impact, the locking projection 24 may come off from the notch 9. Here, when it is necessary to stop the system urgently, if the locking projection 24 is positioned in the notch 9 and the operation unit 14 is pushed to the rear side, the rotation stopping function is restored, and the state is maintained. The operation unit 14 can be twisted. The positioning of the locking projections 24 in the notches 9 is easy because the positioning is performed on the front surface side of the mounting panel 7, and even if the detent function is temporary, it can be recovered immediately to respond to an emergency immediately. it can. That is, fixing of the rotation preventing member 20 does not depend only on the lock nut 18, and the rotation preventing function is mechanically performed by pressing the operation unit 14. The retightening of the lock nut 18 may be performed thereafter.

Although the rotation preventing member 20 is mounted on the front side of the mounting panel 7, the sealing member 28 is integrally provided on the rotation preventing member 20 itself. . The rotation preventing member 20 is preferably formed of a material having a hardness capable of obtaining a rotation preventing function, for example, a polyamide resin. On the other hand, as the sealing member 28, it is preferable to use a curable resin (for example, an elastomer) or rubber having flexibility, that is, waterproofness.
When the seal member 28 is integrated with the detent member 20, the ring-shaped seal member 28 is
The seal member 28 is inserted into the detent member 20, the seal member 28 is adhered to the detent member 20, a sealing agent is applied or injected into the annular groove 27 and cured. Either means can be used.

Further, as shown in FIG.
Is mounted so as to cover the peripheral end of the detent member 20 and is joined to both surfaces of the peripheral part of the detent member 20, the existing waterproof packing 17 becomes unnecessary. In this case, the mounting height of the operation unit 14 from the mounting panel 7 can be reduced by the amount excluding the waterproof packing 17.

FIG. 7 shows another embodiment of the present invention, in which a detent member 20a is provided. The rotation preventing member 20 has a circular insertion hole 2 having an inner diameter through which the screw portion 2 can be inserted.
1a, and a pair of locking projections 22a, 23a (not shown) projecting inward from two radially opposite edges of the insertion hole 21a. The nameplate mounting portion 50 is provided on the peripheral portion of the rotation prevention member 20.
Are integrally formed. A base plate 51 of the nameplate mounting portion 50 is formed with a nameplate arranging recess 52, and a pair of side walls of the recess 52 is formed with nameplate locking grooves 54, 54. Pressing pieces 56, 56 for pressing the nameplate toward the front side are formed on the bottom surface 53 of the recess 52.

The nameplate 60 is provided in the recess 5 of the nameplate mounting portion 50.
2 is inserted and locked in one of the nameplate locking grooves 54, slightly bent, and the other end is inserted and locked in the other nameplate locking groove 54, and is provided in the recess 52. The nameplate 60 is placed on the front side of the pressing pieces 56, 56 of the recess 52 of the nameplate mounting portion 50, and both ends are locked by the locking pieces 55 a, 55 b. Since the pressing pieces 56, 56 have elasticity, the thickness of the nameplate can be adjusted. That is, if the nameplate is thin, it is located on the front side, and if it is thick, it is located on the bottom side, so that the thickness of the nameplate can be adjusted.

[0025]

As described above, according to the rotation preventing structure of the operation switch of the present invention, the locking projection is fitted into the vertical groove of the operating portion main body and the locking projection is fitted into the notch of the mounting panel. The rotation preventing member is interposed between the flange portion of the operation portion main body and the front surface side of the mounting panel. Therefore, the operation portion main body to which the rotation preventing member is mounted in advance is mounted on the mounting panel from the front side of the mounting panel. The operation unit main body can be prevented from rotating by being inserted into the mounting hole, and it is only necessary to screw and fasten the lock nut from the back surface of the mounting panel, so that mounting workability is remarkably improved. In addition, even if the lock nut is loosened and the locking protrusion comes out of the notch, the detent function is immediately performed by pushing the operating part to the back side and fitting the locking protrusion into the notch on the front side of the mounting panel. Since it recovers, it becomes possible to perform the twisting operation in an emergency, and a remarkable effect can be obtained in terms of function. Further, the fixing of the rotation preventing member does not depend only on the lock nut, and the rotation preventing function is mechanically performed by pressing the operation portion toward the rear side, so that the function of fixing the member can be sufficiently obtained.

If the seal member is fitted into an annular groove formed along the peripheral edge of the rotation preventing member and integrally provided by any one of insert molding, sticking and coating, the seal member can be formed. It can be easily and reliably integrated with the detent member. Furthermore, if the sealing member is joined to both surfaces of the rotation preventing member and provided integrally on the peripheral edge portion,
It is not necessary to interpose an existing waterproof packing between the detent member and the flange portion, and the mounting height of the operation portion from the mounting panel can be reduced accordingly.

Further, since the nameplate mounting portion is integrally formed on the peripheral portion of the detent member, the nameplate is provided on the nameplate mounting portion, so that the nameplate is disposed simultaneously with the detent member. In addition, since the nameplate mounting portion can replace the nameplate, it is possible to easily perform the operation of replacing the nameplate in the case of a display error, thereby improving the operation of arranging the nameplate. .

[Brief description of the drawings]

FIG. 1 is an exploded side view of an operation switch having a rotation preventing structure according to an embodiment of the present invention, in which an essential part of the operation switch is cut off.

FIG. 2 shows a detent member of the above detent structure,
(A) is a front view, (b) is a side view, and (c) is a rear view.

FIG. 3 is a front view of a mounting panel having the above-described rotation preventing structure.

FIG. 4 is a plan view showing a state where the operation switch is mounted on a mounting panel.

FIG. 5 is an enlarged vertical cross-sectional view of the detent structure according to the first embodiment.

FIG. 6 is a cut-away side view showing a detent member according to another embodiment of the present invention.

FIG. 7 is a perspective view showing a detent member according to another embodiment of the present invention.

FIG. 8 is a perspective view showing a state in which a name plate is provided on the rotation preventing member according to the first embodiment.

FIG. 9 is a cross-sectional view showing a state in which a nameplate is provided on the rotation preventing member according to the first embodiment.

FIG. 10 is a side view of a state in which a conventional operation switch having a rotation preventing structure is mounted on a mounting panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Operation part main body 2 Screw part 3 Vertical groove 4 Flange part 7 Mounting panel 8 Mounting hole 9 Notch 18 Lock nut 20 Detent member 21 Insertion hole 22, 23 Locking projection 24 Locking projection 27 Ring groove 28, 29 Seal Member 50 Nameplate mounting part 20a Detent member 21a Insertion hole 22a Locking projection 52 Nameplate recess 53 Bottom part 54 Nameplate locking groove 56 Pressing piece

Claims (4)

[Claims] 1. A circular mounting panel, comprising: an operating portion for performing a twisting operation; and an operating portion main body of an operating switch having a flange portion and a screw portion provided continuously from the operating portion toward the rear side. The mounting panel is inserted into the hole from the front side, and a screw nut is screwed into the screw portion from the back side of the mounting panel and fastened, so that the mounting panel is sandwiched between the front and back surfaces by the flange portion and the lock nut. A rotation preventing structure for the operation switch attached by mounting the operation portion body, forming a vertical groove extending in the axial direction by cutting off the screw portion, forming a notch in a hole edge portion of the mounting hole, A ring-shaped detent member is provided between the flange portion and the front side of the mounting panel by inserting the screw portion into the insertion hole, and the detent member is provided from a hole edge of the insertion hole. Protruding inward A locking projection that fits into the vertical groove, a locking projection that projects laterally from a hole edge of the insertion hole and fits into the notch, and that is integrally provided along a peripheral edge and at least the And a waterproof seal member pressed against the mounting panel. 2. An annular groove is formed along a peripheral portion of the rotation preventing member, and the seal member is provided integrally with the annular groove by any one of fitting, insert molding, sticking, and coating. The structure for preventing rotation of an operation switch according to claim 1. 3. The seal member according to claim 1, wherein said seal member is joined to both surfaces of said detent member and provided integrally on a peripheral portion.
The detent structure of the described operation switch. 4. A name plate mounting portion is integrally formed on a peripheral portion of the rotation preventing member, and a name plate disposing recess is formed on a base of the name plate mounting portion. 2. The rotation preventing structure for an operation switch according to claim 1, wherein a name plate locking portion is formed on a side wall of the first member, and a pressing piece for pressing the name plate toward a front side is formed on a bottom surface of the recess.