JP3725922B2 - Box type switch device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a box-type switch device that can be directly attached to a required place without an attachment member such as an attachment panel.
[0002]
[Prior art]
This type of conventional box type switch device is generally configured as shown in FIG. That is, the lower case 2 and the upper case 3 are combined and fixed with the packing 4 interposed therebetween, thereby constituting a box as an exterior body. A contact block 7 is fixed inside the lower case 2 by a tapping screw 8. On the other hand, the upper case 3 is solid with the operation block 9 penetrating the upper surface of the upper case 3, and the operation block 9 is a state in which the cases 2 and 3 are combined with each other to form the box 1. Sometimes, the lower end surface of the pressing rod 10 comes into contact with the front end surface of the pressure receiving body 11 of the contact block 7 and constitutes a general push button switch together with the contact block 7.
[0003]
When the switch device is operated so as to push the push button portion 12 of the operation block 9 inward, the contact 14 is operated via the operation body 13, the pressing rod 10 and the pressure receiving body 11, and a switch switching operation is performed. This switch device can be directly mounted by fixing the box 1 at a required position, unlike a general push button switch or the like that requires a mounting member such as a mounting panel. Since this switch device has the advantage that it can be directly attached to a required location as described above, it is mainly used for switching applications in devices that require an emergency stop switch operation in an emergency.
[0004]
[Problems to be solved by the invention]
By the way, it is necessary to display the function which is a result by operation of the pushbutton part 12 for stop, starting, etc. in said box type switch apparatus, and the location near the operation block 9 in the upper surface of the upper case 3 conventionally. In addition, a label indicating the function is attached, or a function display is directly engraved. However, in the fixed display means as described above, when the circuit configuration of the switch circuit is changed, or when the switch device having a different switch function, for example, the operation block 9 constituting the select switch and the contact block 7 are replaced. There is inconvenience that we cannot cope with.
[0005]
Therefore, as shown in FIG. 5, nameplates 17 displaying various functions are prepared in advance, and these nameplates 17 are alternatively attached to the operation block 9. The nameplate 17 has fixing holes 17a formed in the vicinity of the function display portion, and is attached to the upper case 3 in the following procedure. That is, after the fixing portion 17a of the operation body 18 of the operation block 9 is inserted into the fixing hole 17a of the nameplate 17, the fixing portion 17 is inserted into the mounting hole of the upper case 3, and the fastening ring 19 is inserted into the upper case. 3 is screwed into the screw groove on the outer peripheral surface of the fixing portion 17a and tightened, whereby the nameplate 17 has the waterproof packing 20 attached to the locking surface between the fixing portion 18a and the holding portion 18b of the operation body 18. It is pressed against the upper surface of the upper case 3 and fixed. The nameplate 17 can be easily replaced with a display having a required function as required by removing the fastening ring 19 and extracting the operation block 9 upward.
[0006]
However, when the nameplate 17 is attached to the switch device of FIG. 4, as shown in FIG. 5, the operation block 9 is held at a position displaced upward with respect to the upper surface of the upper case 3 by the thickness d of the nameplate 17. Thus, a gap corresponding to the thickness d is generated between the pressing rod 10 and the pressure receiving body 11. Therefore, the operation stroke of the operation block 9 necessary for operating the contact block 7 becomes large, and when the operator performs a pressing operation with the same feeling as in the case of a normal pushbutton switch, the stroke becomes insufficient. Inconvenience that it is difficult to perform the switching operation. Further, as clearly shown in FIG. 5, the nameplate 17 is fixed to the upper surface of the upper case 3 by the thickness D of the packing 20, so that foreign matter or the like is present in the gap between the nameplate 17 and the upper case 3. In the case where the operator is caught, there is a risk of damage when the operator touches the hand. Further, as shown in FIG. 5, the nameplate 17 and the upper case 3 are waterproofed by the packing 20, but there is also a problem that the nameplate 17 and the operation body 18 cannot be waterproofed.
[0007]
Therefore, an object of the present invention is to provide a box-type switch device in which the operation stroke of the operation block is always constant regardless of whether or not the nameplate is attached, and which has a complete waterproof structure.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a box-type switch device according to the present invention includes an upper case and a lower case which are combined with each other to form a box, a contact block fixed inside the lower case, and the upper part. A box-type switch device including an operation block that is fixed to the case in a penetrating state and is connected to the contact block so as to form a switch. A nameplate having a fixing hole of a predetermined diameter is provided, and the nameplate is fixed at a height substantially equal to the thickness of the nameplate at a hole edge peripheral portion of the mounting hole that penetrates the operation block in the upper case. A ring-shaped spacer projection having an outer diameter capable of fitting the outer hole into the outer peripheral portion, and projecting outwardly, A locking surface between a fixing portion that penetrates the protrusion for pacer and a holding portion that is larger in diameter than the fixing portion and exposed to the outside of the upper case is fitted to the outer peripheral surface of the fixing portion. It was set as the structure pressed on the front-end | tip peripheral surface of the said protrusion for spacers via this packing.
[0009]
According to the box-type switch device, when the nameplate is not attached, the locking surface between the holding portion and the fixing portion in the operation block is located on the front end peripheral surface of the spacer projection through the first packing. The operation block is fixed to the upper case by being pressed. On the other hand, when attaching a nameplate, since the thickness of a nameplate and the height of the protrusion for spacers are substantially the same, a nameplate does not act at all with respect to attachment to the upper case of an operation block. Accordingly, the locking surface of the operation block is pressed against the tip peripheral surface of the spacer projection through the first packing as in the case where there is no nameplate, and the operation block is fixed to the upper case. That is, regardless of whether the nameplate is attached or not, the operation block is fixed at a fixed relative position with respect to the upper case, so that the operation stroke of the operation block is always constant. Regardless of whether or not the nameplate is attached, the locking surface of the operation block is always pressed against the tip peripheral surface of the spacer projection through the first packing, so that the operation block and the upper case are completely waterproof. Can be fixed to each other by structure.
[0010]
In the above invention, a ring-shaped fitting groove is formed on the upper surface of the upper case along the outer peripheral surface of the spacer projection, and the fitting groove is slightly smaller than the groove width and has a groove shape. The second packing having a cross-sectional shape slightly higher than the depth is fitted, and the second packing is deformed by the pressing by the nameplate fitted to the outer peripheral portion of the spacer projection, and the whole is It is preferable to adopt a configuration that is pushed into the fitting groove.
By adopting such a configuration, there is an advantage that waterproofing between the nameplate and the case can be performed completely.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
1 and 2 both show a box-type switch device according to an embodiment of the present invention. FIG. 1 (a) is a plan view with a nameplate 17 attached, and FIG. 1 (b) is an A- FIG. 2A is a cross-sectional view taken along line A, FIG. 2A is a plan view showing a state where no nameplate 17 is attached, and FIG. 2B is a cross-sectional view taken along line BB in FIG. In these drawings, the same or equivalent components as those in FIGS. 4 and 5 are denoted by the same reference numerals and the description thereof is omitted, and different configurations will be described below with reference to FIG.
[0012]
FIGS. 3A and 3B show only the main parts of FIGS. 1 and 2, respectively, and are shown side by side for comparison. In the figure, the upper case 21 has a ring-shaped spacer projection 23 outward, that is, upward, at the peripheral edge of the mounting hole 22 through which the holding portion 18b of the operation body 18 in the operation block 9 is inserted. Projected. The spacer projection 23 is set such that the protruding height h from the upper surface of the upper case 21 shown in FIG. 5B is substantially equal to the thickness d of the nameplate 17 shown in FIG. The outer diameter is set so that the fixing hole 17a of the nameplate 17 can be inserted into the outer peripheral portion.
[0013]
Further, a ring-shaped fitting groove 24 is formed on the upper surface of the upper case 21 along the outer peripheral surface of the spacer projection 23. The fitting groove 24 is packed only when the name plate 17 is attached. 27 is fitted. FIG. 3C is an enlarged view of the main part in a state before the fastening ring 19 in FIG. 3A is tightened, and FIG. 3D is an enlarged view of the main part of FIG. The packing 27 has a cross-sectional shape slightly smaller than the groove width of the fitting groove 24 and slightly higher than the depth of the fitting groove 24 as clearly shown in FIG. FIG. 3 (e) is an enlarged view of the main part of FIG. 3 (b).
[0014]
In FIGS. 1B and 2B, the description of the configuration shown in FIGS. 4 and 5 is supplemented. When the push button portion 12 is pressed, the operating body 13 to which the push button portion 12 is fixed is moved downward while sliding on the fixing portion 18a of the operation main body 18 against the upward biasing force of the return spring 28. When the pressing rod 10 connected to the main body 13 pushes down the pressure receiving body 11 against the urging force of the contact pressure spring 30 and the return spring 29, the contact 14 is moved down by the pressure receiving body 11, and the switch switching operation is performed. Is called. When the pressing of the push button portion 12 is released, the pressure receiving body 11 is returned to the upper limit position by the return spring 29, and the pressing rod 10 is returned to the upper limit position where it comes into contact with the locking surface of the fixing portion 18a of the operation body 13. In any state, the opposing surfaces of the pressing rod 10 and the pressure receiving body 11 are in contact with each other.
[0015]
In addition, the thread groove 31 is formed in the outer peripheral surface of the fixing | fixed part 18a of the operation main body 18, and the operation block 9 inserts the fixing | fixed part 18a in the attachment hole 22 of the upper case 21 from the outside, and the locking surface 18c is penetrated. After the packing ring 20 is interposed and applied to the tip peripheral surface of the spacer projection 23, the fastening ring 19 is screwed into the thread groove 31 of the fixing portion 18a from the inside of the upper case 21 and tightened. It is fixed to the upper case 21. Therefore, once the operation block 9 is fixed to the upper case 21, the relative position between the operation body 18 and the upper case 21 of the operation block 9 does not always change regardless of the switch switching operation or the like. The operating body 13 and the pressing rod 10 are held at predetermined positions by the operating body 18 in a state where the push button portion 12 is not pressed.
[0016]
When the nameplate 17 is not attached to the box type switch device described above, the holding portion of the operation body 18 in the operation block 9 is obtained by tightening the tightening ring 19 as shown in FIGS. The operation block 9 is fixed to the upper case 21 in a state in which the locking surface 18c between 18b and the fixing portion 18a is pressed against the tip peripheral surface of the spacer projection 23 with the packing 20 interposed therebetween. At this time, as shown in FIG. 2B, the pressing rod 10 of the operation block 9 comes into contact with the pressure receiving body 11 of the contact block 7 so that the operation block 9 can switch the contact block 7 with a predetermined operation stroke. It is assumed that it is set. Here, since the locking surface 18c of the operation block 9 is pressed against the tip peripheral surface of the spacer projection 23 with the packing 20 interposed therebetween, the operation block 9 and the upper case 21 are mutually waterproof and have a completely waterproof structure. Fixed.
[0017]
On the other hand, when the name plate 17 is attached, the packing 27 is fitted into the fitting groove 24 as shown in FIG. Here, since the height of the packing 27 is slightly larger than the depth of the fitting groove 24 before the tightening ring 19 is tightened, the nameplate 17 projects upward from the tip of the spacer projection 23 by the difference c. ing. Next, when the tightening ring 19 is tightened to fix the operation block 9 to the upper case 21, the name plate 17 is pushed down by the locking surface 18c by the difference c, and the packing 27 is pressed by the pushed down name plate 17. The entire packing 27 is forcibly pushed into the fitting groove 24. Thereby, the space between the locking surface 18c of the operation block 9 and the spacer projection 23 is completely waterproofed by the packing 20 that receives the pressing force of the locking surface 18c and is pressed against the spacer projection 23. A completely waterproof structure is formed between the nameplate 17 and the upper case 21 by the restoring force of the deformed packing 27.
[0018]
That is, as apparent from the comparison between FIG. 3D and FIG. 3E, the locking surface 18c of the operation block 9 always has the packing 20 interposed therebetween for the spacer regardless of whether the nameplate 17 is attached. The operation block 9 and the upper case 21 can always be fixed to each other with a complete waterproof structure since they are pressed against the peripheral surface of the protrusion 23. When the nameplate 17 is attached, in addition to the waterproof structure described above, a complete waterproof structure can be formed between the nameplate 17 and the upper case 21.
[0019]
Further, since the height h of the spacer projection 23 is substantially the same as the thickness d of the nameplate 17, when the tightening of the fastening ring 19 is finished, the tip of the spacer projection 23 and the upper surface of the nameplate 17 are Is the same. That is, the nameplate 17 does not get in the way when the operation block 9 is attached to the upper case 21. Accordingly, the locking surface 18c of the operation block 9 is pressed against the tip peripheral surface of the spacer projection 23 via the packing 20 in the same manner as in the case where the nameplate 17 is not provided, and the operation block is fixed to the upper case. As a result, as is clear from a comparison between FIG. 3A and FIG. 3B, the operation block 9 is fixed at a fixed relative position with respect to the upper case 21 regardless of whether or not the nameplate is attached. As clearly shown in FIGS. 1B and 2B, the lower end of the pressing rod 10 is always in contact with the upper end of the pressure receiving body 11, and the operation stroke of the operation block 9 is always constant.
[0020]
In the above embodiment, the case where the push button switch is configured by the operation block 9 and the contact block 7 has been described. However, in the case where other switches such as a select switch are configured, whether or not the nameplate is attached is determined. Regardless, since the lower end of the pressing rod 10 is always kept in contact with the upper end of the pressure receiving body 11, the same effect as described above can be obtained. Of course, it is possible to provide a single box 1 with a plurality of switches in which the operation block 9 and the contact block 7 are combined.
[0021]
【The invention's effect】
As described above, according to the box type switch device of the present invention, the hole edge peripheral portion of the mounting hole that penetrates and fixes the operation block in the upper case has a height substantially equal to the thickness of the nameplate and is used for fixing the nameplate. A ring-shaped spacer projection with an outer diameter that can be fitted into the outer periphery of the hole has been configured to project outward, so that the operation block is fixed to the upper case regardless of whether or not the nameplate is attached. Therefore, the operation stroke of the operation block is always constant. Therefore, a stable switch switching operation can always be performed. Regardless of whether or not the nameplate is attached, the locking surface of the operation block is always pressed against the tip peripheral surface of the spacer projection through the first packing, so that the operation block and the upper case are completely waterproof. Can be fixed to each other by structure.
[0022]
Also, a ring-shaped fitting groove is formed on the upper surface of the upper case so as to be recessed along the outer peripheral surface of the spacer projection, and the fitting groove is slightly smaller than the groove width and larger than the groove depth. If the packing with a slightly higher cross-sectional shape is fitted, and the packing is deformed by pressing with the nameplate fitted on the outer peripheral surface of the spacer projection, the whole is pushed into the fitting groove. Waterproofing between the case and the case can be performed completely.
[Brief description of the drawings]
1A and 1B show a case where a nameplate of a box-type switch device according to an embodiment of the present invention is attached, wherein FIG. 1A is a plan view and FIG. 1B is a cross-sectional view taken along line AA in FIG.
FIGS. 2A and 2B show a case where a nameplate of the box type switch device is not attached, where FIG. 2A is a plan view and FIG. 2B is a cross-sectional view taken along line BB in FIG.
FIGS. 3A and 3B are partially cut front views showing the main parts of FIGS. 1B and 2B extracted for comparison, and FIG. The enlarged view of the principal part of (a) which shows the state before tightening a ring, (d) is the enlarged view of the principal part of (a) which shows the state after fastening a fastening ring, (e) is (b). It is an enlarged view of the principal part.
FIG. 4 is a longitudinal sectional view showing a conventional box type switch device.
FIG. 5 is a longitudinal sectional view showing a state in which a nameplate of the switch device is attached.
[Explanation of symbols]
1 Box 2 Lower case 7 Contact block 9 Operation block 17 Name plate 17a Fixing hole 18a Fixing portion 18b Holding portion 18c Locking surface 20 First packing 21 Upper case 22 Mounting hole 23 Spacer projection 27 Second packing

Claims (2)

An upper case and a lower case which are combined with each other to form a box, a contact block fixed inside the lower case, and connected to form a switch for the contact block fixed in a penetrating manner to the upper case. A box-type switch device including an operation block for
The function by the operation of the operation block is displayed in part, and a nameplate having a fixing hole of a predetermined diameter formed in the other part,
A hole edge peripheral portion of the mounting hole that penetrates the operation block in the upper case has a height substantially equal to the thickness of the nameplate and an outer diameter that allows the fixing hole of the nameplate to be fitted into the outer peripheral portion. A ring-shaped spacer projection is projected outward,
A locking surface between a fixed portion that penetrates the spacer projection in the operation block and a holding portion that is larger in diameter than the fixed portion and exposed to the outside of the upper case is an outer peripheral surface of the fixed portion. A box type switch device, wherein the box type switch device is pressed against the peripheral surface of the tip of the spacer projection through a first packing fitted in the spacer. A ring-shaped fitting groove is formed on the upper surface of the upper case along the outer peripheral surface of the spacer projection, and the fitting groove is slightly smaller than the groove width and slightly higher than the groove depth. A second packing having a cross-sectional shape is fitted, and the second packing is deformed by the pressing by the nameplate fitted to the outer peripheral portion of the protrusion for the spacer, so that the whole is inside the fitting groove. 2. The box type switch device according to claim 1, wherein the box type switch device is pushed in.

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