JPH11232960A - Inspection apparatus and inspection method for movable contact body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an economical inspection apparatus and an inspection method which is capable of automatically carrying out reliable inspection without misjudgment regarding an inspection apparatus and an inspection method for inspecting a movable contact body for a panel switch to be used for operation panels of a various types of electronic apparatuses. SOLUTION: This inspection apparatus is economical and is capable of automatically carrying out the inspection of a movable contact body for a panel switch, and the apparatus and this inspection method are for carrying out sure reliable inspection without misjudgment. The reliable inspection without misjudgment is carried out by judging whether or not the installation state and the reverse action force of a dome-like movable contact 1 are proper by pushing a dome-like movable contact 1 installed in a movable contact body 10 for a panel switch by a pushing pin 22 with either the smaller load or the higher load than a regulated value of the reverse action force of the dome-like movable contact 1 and then pushing the contact 1 again with the other load.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for inspecting a movable contact body for a panel switch used for an operation panel of various electronic devices.

[0002]

2. Description of the Related Art First, a movable contact body for a panel switch and a configuration of a panel switch using the same will be described with reference to FIG.
This will be described with reference to FIG.

FIG. 8 is a cross-sectional view of a movable contact body for a panel switch, and FIG. 9 is an exploded perspective view of the movable contact body. In the figure, reference numeral 1 denotes a dome-shaped movable contact made of an elastic metal thin plate; A separator 3 having been subjected to a release treatment is attached to 2A,
A spacer made of an insulating film provided with a plurality of holes 2B, the dome-shaped movable contact 1 inserted into the hole 2B of the spacer 2 is a flexible insulating film sheet 4 coated with an adhesive 4A on the lower surface. Is attached to the spacer 2.

[0005] Reference numeral 5 denotes a protective sheet made of an insulating film for preventing corrosion of the dome-shaped movable contact 1 due to gas in the air at the time of storage and transportation, and attachment of foreign substances. Spacer 2 through 3
Hole 2 attached to the lower surface and into which dome-shaped movable contact 1 is inserted
A movable contact body 10 for a panel switch is configured by closing the lower surface of B.

FIG. 10 is a sectional view of a panel switch using the above-described movable contact body for a panel switch. In FIG. 10, reference numeral 6 denotes a wiring board provided with a center fixed contact 6A and an outer fixed contact 6B on the upper surface. , Protective sheet 5 and separator 3
The movable contact body 10 for a panel switch from which the dome-shaped movable contact 1 has been peeled off is placed on the outer fixed contact 6B by the adhesive 2A on the lower surface of the spacer 2 such that the center of the inner surface is opposed to the center fixed contact 6A. It is affixed to the wiring board 6.

A push button 7 disposed above the movable contact body for the panel switch is a push button made of elastic rubber or molded resin having an operation portion 7A on the upper surface, and a pressing portion provided on the lower surface of the operation portion 7A. 7B abuts on the central apex of the dome-shaped movable contact 1 via the sheet 4, and the panel switch 1
1 is configured.

In the above configuration, when the operating portion 7A on the upper surface of the push button 7 is pressed, the pressing portion 7B on the lower surface of the operating portion 7A presses the dome-shaped movable contact 1 via the sheet 4, and the dome-shaped movable contact 1 is inverted. When the central portion of the inner surface is brought into contact with the central fixed contact 6A by performing the operation, the central fixed contact 6A and the outer fixed contact 6B of the wiring board 6 are electrically connected, and when the pressing force to the push button 7 is removed, the dome is removed. Movable contact 1
Due to the elastic restoring force, the central portion of the inner surface is separated from the central fixed contact 6A and returns to the OFF state in FIG.

Next, a conventional inspection method of the panel switch movable contact body 10 and the panel switch 11 using the same will be described. The panel switch movable contact body 10 from which the protective sheet 5 and the separator 3 are peeled off is described. When the panel switch 11 is affixed to the wiring board 6, as described above, the operating portion 7A on the upper surface of the push button 7 is pressed to cause the dome-shaped movable contact 1 to perform an inverting operation, thereby causing electrical contact and separation. Using the center fixed contact 6A and the outer fixed contact 6B of the wiring board 6, the inversion operation of the dome-shaped movable contact 1 and the confirmation of the electrical connection as a switch can be performed.

On the other hand, in the state of the panel switch movable contact body 10 with the protective sheet 5 and the separator 3, it is impossible to confirm such an electrical connection. And a hand inspection for confirming the reversal operation by pressing the dome-shaped movable contact 1 through the sheet 4 with a finger or an operation stick.

[0010]

However, in the above conventional inspection method, the movable contact body 1 for a panel switch is used.
Since the inspection of No. 0 is performed by human eyes and fingers, the inspection work takes time and costs are increased, and at the same time, FIG.
As shown in the figure, when the dome-shaped movable contact 1 is not provided, the visual inspection is relatively easy. However, the dome-shaped movable contact 1 as shown in FIG. 11 or when two dome-shaped movable contacts 1 are inserted as shown in FIG. 11C, or when the reversing operation force of the dome-shaped movable contact 1 is out of the specified value, There is a problem that it is difficult to make a determination visually, and an erroneous determination is likely to occur even in an inspection using a tactile sensation of a finger.

SUMMARY OF THE INVENTION The present invention solves such a conventional problem, and provides a reliable inspection of a dome-shaped movable contact without erroneous judgment, and an inexpensive movable contact body for a panel switch which can be automated. It is an object of the present invention to provide an inspection device and an inspection method for a movable contact body that are used.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an inspection apparatus and an inspection method for a movable contact body according to the present invention include a dome-shaped movable contact mounted on a panel switch movable contact body. After pressing by the pressing means with either a smaller load or a larger load than the specified value of the reversing operation force of the above, pressing again with the other load, the mounting state of the dome-shaped movable contact of the panel switch movable contact body and This is to determine whether the reversing operation force is acceptable or not.

[0013] This makes it possible to obtain an inspection apparatus and an inspection method for a movable contact body for a panel switch, which can be performed reliably without erroneous determination, can be automated, and are inexpensive.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a holding table for mounting a movable contact body for a panel switch on which a dome-shaped movable contact made of an elastic metal thin plate as an object to be inspected is mounted. , Comprising a pressing means comprising a pressing pin arranged vertically movable above the holding table, and a detecting unit for detecting the vertical movement of the pressing means, wherein the pressing means is higher than a prescribed value of the reversing operation force of the dome-shaped movable contact. After the panel switch movable contact body is pressed by either a small load or a large load, the panel switch movable contact body is pressed again by the other load to determine whether the mounted state of the dome-shaped movable contact of the panel switch movable contact body and the reversal operation force are acceptable. In the state where the dome-shaped movable contact is normally mounted, the inspection device is provided with a means for determining the Since the point does not reverse, the lowering of the pressing pin stops halfway, and when there is no dome-shaped movable contact or when the dome-shaped movable contact is mounted in the opposite direction, the pressing pin descends to a predetermined position. The presence or absence and the front and back can be determined, and then by pressing again with a large load, in a normally mounted state, the dome-shaped movable contact reverses and the pressing pin descends to a predetermined position, When the two dome-shaped movable contacts are mounted, the downward movement of the pressing pin stops halfway because the dome-shaped movable contact does not perform the reversing operation, so that the number of the dome-shaped movable contacts can be determined and the reversing operation force is defined. By pressing with a load smaller and larger than the value, it is possible to determine whether the reversing operation force of the dome-shaped movable contact is within the specified value, and there is no erroneous determination and reliable inspection Together it can be carried out,
This has the effect that an automatic and inexpensive inspection device for a movable contact body for a panel switch can be obtained.

According to a second aspect of the present invention, in the first aspect of the present invention, the first pressing pin in which the pressing means descends with a load smaller than a prescribed value of the reversing operation force of the dome-shaped movable contact; It is composed of two pressing pins of a second pressing pin descending with a load larger than the specified value of the reversing operation force of the contact, and the dome-shaped movable contact is pressed by one of the first pressing pin and the second pressing pin. After that, the dome-shaped movable contact is pressed again by the other pressing pin.The two pressing pins are mounted on the inspection device, and the two dome-shaped movable contacts are sequentially inspected by the two pressing pins. Therefore, there is no need to switch or adjust the load of the pressing pin, which has the effect of shortening the inspection time.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, the detecting portion arranges the plate above the holding table and provides a contact portion to the pressing pin, and moves the pressing pin up and down. It is configured to detect by the contact and separation of the pressing pin and the contact part of the pressing pin. Since the vertical movement of the pressing pin is directly detected by the contact and separation of the contact part and the plate, the micro switch and the optical sensor etc. There is no need to provide a detection unit that is attached to the inspection device to detect the vertical movement of the pressing pin, and has the effect that the configuration of the inspection device can be simplified.

According to a fourth aspect of the present invention, in the first aspect of the present invention, a coil spring is mounted on the pressing pin, and the pressing pin is lowered with a constant load by the coil spring. This has an effect that an inspection apparatus that can easily adjust the downward load of the pressing pin and is easy to handle can be provided as compared with the case where the pressing pin is lowered with a constant load using an electronic solenoid, air, or the like.

According to a fifth aspect of the present invention, in addition to the first aspect, in addition to the pressing pin,
A detection pin that moves up and down with a constant load is arranged, and this detection pin detects the presence or absence of holes and grooves provided in the movable contact body for panel switch. The presence or absence of holes or grooves in the movable contact body for use can be inspected simultaneously.

According to a sixth aspect of the present invention, a movable contact body for a panel switch on which a dome-shaped movable contact made of an elastic metal thin plate is mounted as an object to be inspected, is obtained by using a specified value of a reversing operation force of the dome-shaped movable contact. An inspection method for determining whether the mounting state of the dome-shaped movable contact of the movable contact body for the panel switch and the reversing operation force are acceptable or not, after being pressed by one of the small load and the large load, and then pressed again by the other load. It is pressed with a load smaller than the specified value of the reversing operation force of the dome-shaped movable contact, the presence or absence of the dome-shaped movable contact and the front and back are determined. By determining the number of movable contacts and pressing with a load smaller and larger than the specified value of the reversing operation force, the reversing operation force of the dome-shaped movable contact is within the specified value. Since it is determined whether, with enabling a reliable inspection without erroneous determination, such an action can be obtained inspection method of the movable contact member for inexpensive panel switch it can be automated.

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIGS. The same components as those described in the section of the related art are denoted by the same reference numerals, and detailed description will be omitted.

(Embodiment 1) FIG. 1 is a sectional view of an inspection apparatus for a movable contact body according to a first embodiment of the present invention.
In the figure, reference numeral 21 denotes a holding table, 22 denotes a metal pressing pin which is disposed above and below the holding table 21 so as to be movable up and down. A movable contact body 10 for a panel switch, on which a movable contact 1 is mounted and whose upper and lower surfaces are covered with a sheet 4 and a protective sheet 5, is placed as an inspection object.

Reference numeral 23 denotes a metal plate, and reference numeral 24 denotes a holder for holding the upper end of the pressing pin 22 so as to be vertically movable. The lower end of the pressing pin 22 having a pressing portion 22A at the lower end is formed in a through hole of the plate 23. An insulating ring 25 made of rubber, resin, or the like is inserted into the inner periphery of the through hole 23A to prevent looseness of the pressing pin 22 and maintain insulation.

The disk-shaped contact portion 22 of the pressing pin 22
A coil spring 26 is mounted between B and the lower end of the holder 24 in a slightly bent state, urges the pressing pin 22 downward with a constant load, and a lead wire 27 is connected to the upper end of the pressing pin 22 and the plate 23. The other ends of the lead wires 27 and 28 are connected to an electronic circuit (not shown) of the inspection apparatus.

In the above configuration, first, the coil spring 2
The load of No. 6 is slightly smaller than the prescribed value of the reversing operation force of the dome-shaped movable contact 1 of the panel switch movable contact body 10, and the pressing pin 22 is lowered by this load to press the pressing portion 22A.
When the dome-shaped movable contact 1 is pressed via the sheet 4 with the dome-shaped movable contact 1 normally attached to the panel switch movable contact body 10, the pressing force of the pressing pin 22 is dome-shaped in the state shown in FIG. Since the reversing operation force of the movable contact 1 is smaller, the dome-shaped movable contact 1 does not perform the reversing operation, the pressing pin 22 stops halfway down, a gap remains between the contact portion 22B and the plate 23, and the pressing pin 22 Plate 2
An OFF signal is transmitted from lead wires 27 and 28 connected to 3 to an electronic circuit (not shown) of the inspection apparatus.

On the other hand, when there is no dome-shaped movable contact 1 as shown in FIG. 2A, or when the dome-shaped movable contact 1 is mounted in the opposite direction as shown in FIG. Since the pressing portion 22A of the pressing pin 22 presses the sheet 4 to bend and the contact portion 22B of the pressing pin 22 comes into contact with the plate 23, an ON signal is transmitted from the lead wires 27 and 28. The electronic circuit of the inspection device can determine the presence / absence of the dome-shaped movable contact 1 and determine the front and back sides.

Next, the load of the coil spring 26 is set to a load slightly larger than the prescribed value of the reversing operation force of the dome-shaped movable contact 1, and the pressing pin 22 again causes the pressing pin 22 to move the dome-shaped movable contact 1.
3A, when the dome-shaped movable contact 1 is normally mounted, the contact portion 22B of the pressing pin 22 comes into contact with the plate 23 because the dome-shaped movable contact 1 performs a reversing operation in the state shown in FIG. And an ON signal is transmitted from the leads 27 and 28 to the electronic circuit of the inspection apparatus.

On the other hand, when two dome-shaped movable contacts 1 are mounted as shown in FIG. 3 (b), two dome-shaped movable contacts 1 overlap with a load slightly larger than the reversing operation force of one dome. Since the movable contact 1 does not perform the reversing operation, the pressing pin 22
Stops during the descent, leaving a gap between the contact portion 22B and the plate 23, and an OFF signal is transmitted from the lead wires 27 and 28. As a result, the electronic circuit of the inspection apparatus allows the dome-shaped movable contact 1 to normally operate. It is possible to determine whether or not a plurality of sheets are mounted.

As described above, according to the present embodiment, the pressing pin 22 presses the dome-shaped movable contact 1 with a load slightly smaller than the prescribed value of the reversing operation force of the dome-shaped movable contact 1, and the dome-shaped movable contact The presence / absence and the front and back of the dome-shaped movable contact 1 are determined, and thereafter the pressing is performed again with a large load to determine the number of the dome-shaped movable contacts 1, and the pressing is performed with a load smaller than the specified value of the reversing operation force and a large load. It is determined whether or not the reversing operation force of the dome-shaped movable contact 1 is within a specified value, so that reliable inspection can be performed without erroneous determination, and the movable contact for a panel switch that can be automated and is inexpensive. It is possible to realize a body inspection apparatus and a body inspection method.

Since the plate 23 is disposed above the holding table 21 and the contact portion 22B is provided on the pressing pin 22, the vertical movement of the pressing pin 22 is detected by the contact and separation of the contact portion 22B and the plate 23. In addition, there is no need to mount a microswitch, an optical sensor, or the like on the inspection device and provide a detection unit for detecting the vertical movement of the pressing pin 22, thereby simplifying the configuration of the inspection device.

Further, a coil spring 26 is mounted between the contact portion 22B of the pressing pin 22 and the holder 24, and the pressing pin 22 is lowered with a constant load by the coil spring 26, so that an electronic solenoid or air As compared with the case where the pressing pin 22 is lowered with a constant load by using the above-described method, an inspection apparatus in which the adjustment of the lowering load of the pressing pin is easy and the handling is easy can be achieved.

In the above description, the coil spring 26 is mounted between the contact portion 22B of the pressing pin 22 and the holder 24, and the pressing pin 22 is lowered with a constant load by the coil spring 26. Contact part 22B
The configuration in which the vertical movement of the pressing pin 22 is detected by the contact and separation of the plate 23 disposed above the holding table 21 has been described. As shown in the front view of FIG. A configuration in which the dome-shaped movable contact of the panel switch movable contact body 10 is pressed by lowering the fixed pin 31 with a constant load, and the vertical movement of the pressing pin 31 is achieved by switching the microswitch 32 and the like mounted on the inspection device with the arm 31A. It is needless to say that the present invention can be implemented even if the configuration for detecting is detected.

(Embodiment 2) FIG. 5 is a sectional view of an inspection apparatus for a movable contact body according to a second embodiment of the present invention.
In the figure, a movable contact body 1 for panel switch, which is an object to be inspected, having a dome-shaped movable contact 1 mounted on a holding table 34.
0 is placed, and a metal plate 35 is arranged above the same as in the first embodiment,
The plate 35 is provided with a first pressing pin 37 having a coil spring 36 having a load slightly smaller than the specified value of the reversing operation force of the dome-shaped movable contact 1, and the plate 35 is larger than the specified value of the reversing operation force of the dome-shaped movable contact 1. Two pressing pins, that is, a second pressing pin 39 to which a coil spring 38 having a relatively large load is mounted, are arranged.

In the above configuration, first, the pressing portion 37A of the first pressing pin 37 is pressed by the dome-shaped movable contact 1 with a load slightly smaller than the prescribed value of the reversing operation force of the dome-shaped movable contact 1.
When the dome-shaped movable contact 1 is normally mounted on the panel switch movable contact body 10, the dome-shaped movable contact 1 does not perform a reversing operation.
A gap remains between the contact portion 37B and the plate 35, and a signal of OFF is transmitted from a lead wire connected to the first pressing pin 37 and the plate 35 to an electronic circuit (not shown) of the inspection apparatus, and the dome shape is formed. When the movable contact 1 is not provided or is mounted in the opposite direction, the pressing portion 37A presses the sheet 4 to bend and the contact portion 37B comes into contact with the plate 35, so that an ON signal is output from the lead wire. The electronic circuit of the inspection apparatus determines whether or not the dome-shaped movable contact 1 exists, and determines whether the dome-shaped movable contact 1 is present on the front and back sides, as in the first embodiment.

Thereafter, the holding table 34 moves rightward to the position of the second pressing pin 39 with the movable contact body 10 for a panel switch mounted thereon, and the second pressing pin 39 descends. When the pressing portion 39A presses the dome-shaped movable contact 1 with a load slightly larger than the specified value of the reversing operation force of the dome-shaped movable contact 1, the dome-shaped movable contact 1 is normally mounted. 1 performs the reversing operation, so that the contact portion 39B of the second pressing pin 39
And the ON signal is transmitted from the lead wire to the electronic circuit of the inspection apparatus, and when two dome-shaped movable contacts 1 are mounted, it is slightly larger than the prescribed value of the reversing operation force for one sheet. Since the dome-shaped movable contact 1 overlapped by the load does not perform the reversing operation, the second pressing pin 39 stops halfway down, leaving a gap between the contact portion 39B and the plate 35, and an OFF signal is output from the lead wire. Then, the electronic circuit of the inspection apparatus determines whether or not one dome-shaped movable contact 1 is normally mounted.

As described above, according to the present embodiment, the first pressing pin 37 that descends with a load slightly smaller than the prescribed value of the reversing operation force of the dome-shaped movable contact 1 and the reversing operation of the dome-shaped movable contact 1 Since two pressing pins of the second pressing pin 39 descending with a load slightly larger than the specified value of the force are mounted on the inspection device, and the dome-shaped movable contact 1 is sequentially inspected by the two pressing pins. In addition, it is not necessary to switch or adjust the load of the pressing pin, and it is possible to obtain an inspection device and an inspection method for a movable contact body for a panel switch, which shorten the inspection time.

The movable contact body for the panel switch includes:
Normally, when assembling as a panel switch, there are provided positioning holes and grooves for combination with a wiring board, a push button, and the like. In addition to the pressing pins for dome-shaped movable contact inspection, as shown in FIG. In the inspection device, a detection pin 40 that moves up and down with a constant load is arranged, and similarly to the above-described pressing pin, the pressing portion 40A of the detection pin 40 presses the panel switch movable contact body 10 to contact the detection pin 40. Part 40
The presence or absence of the hole 10A of the panel switch movable contact body 10 can be inspected simultaneously with the inspection of the dome-shaped movable contact 1 by the contact and separation of the plate 41 and the plate B.

In the above description, the panel switch movable contact body 10 is configured such that the dome-shaped movable contact 1 made of an elastic metal thin plate is mounted in the spacer 2 and the upper and lower surfaces are covered with the sheet 4 and the protection sheet 5. However, as shown in FIG. 7, the dome-shaped movable contact 1 is mounted on the wiring board 42 on which the central fixed contact 42A and the outer fixed contact 42B are formed. It goes without saying that the same inspection can be performed also on a movable contact body for a panel switch or the like, which is attached by a sheet 43 coated with an adhesive 43A on the lower surface so that the contact point faces the central fixed contact 42A.

[0038]

As described above, according to the present invention, it is possible to obtain an inspection apparatus and an inspection method for a movable contact body for a panel switch, which are capable of performing a reliable inspection without erroneous determination and capable of being automated and inexpensive. The advantageous effect described above can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of an inspection device for a movable contact body according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is a sectional view of the same.

FIG. 4 is a front view showing another embodiment.

FIG. 5 is a cross-sectional view of an inspection device for a movable contact body according to a second embodiment of the present invention.

FIG. 6 is a sectional view of the same.

FIG. 7 is a sectional view of the movable contact body for the panel switch.

FIG. 8 is a sectional view of a conventional movable contact body for a panel switch.

FIG. 9 is an exploded perspective view of the same.

FIG. 10 is a sectional view of the panel switch.

FIG. 11 is a sectional view of the movable contact body for the panel switch.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Dome-shaped movable contact 2 Spacer 4 Sheet 5 Protective sheet 10 Panel switch movable contact 10A Hole 21, 34 Holder 22, 31 Press pin 22A, 37A, 39A Press section 22B, 37B, 39B Contact section 23, 35, 41 Plate 23A Through hole 24 Holder 25 Insulation ring 26, 36, 38 Coil spring 27, 28 Lead wire 30 Electronic solenoid 31A Arm part 32 Micro switch 37 First pressing pin 39 Second pressing pin 40 Detection pin 40A Pressing part 40B Contact Part 42 wiring board 42A center fixed contact 42B outer fixed contact 43 sheet 43A adhesive

Claims (6)

[Claims] 1. A holding table on which a movable contact body for a panel switch on which a dome-shaped movable contact made of an elastic metal thin plate as an object to be inspected is mounted, and a presser arranged to be vertically movable above the holding table. It comprises a pressing means consisting of a pin and a detecting unit for detecting the vertical movement of the pressing means, and the pressing means is movable for the panel switch by one of a load smaller than or larger than a specified value of the reversing operation force of the dome-shaped movable contact. An apparatus for inspecting a movable contact body, comprising: means for pressing a contact body, and then again by another load to determine a mounted state of a dome-shaped movable contact of a panel switch movable contact body and a pass / fail of reversing operation force. 2. The first pressing pin in which the pressing means descends with a load smaller than the prescribed value of the reversing operation force of the dome-shaped movable contact, and the first pressure pin descends with a load larger than the prescribed value of the reversing operation force of the dome-shaped movable contact. After the dome-shaped movable contact is pressed by one of the first pressing pin or the second pressing pin, the dome-shaped movable contact is pressed again by the other pressing pin. The inspection apparatus for a movable contact body according to claim 1. 3. The detecting section is arranged such that a plate is arranged above the holding table and a contact section is provided on the pressing pin, and the vertical movement of the pressing pin is detected by contact and separation between the plate and the contact section of the pressing pin. The inspection device for a movable contact body according to claim 1 or 2. 4. The inspection apparatus for a movable contact body according to claim 1, wherein a coil spring is mounted on the pressing pin, and the pressing pin is lowered with a constant load by the coil spring. 5. In addition to a pressing pin, a detection pin which moves up and down with a constant load is arranged, and the detection pin detects the presence or absence of a hole or a groove provided in a movable contact body for a panel switch. The inspection device for a movable contact body according to any one of the above. 6. A panel switch movable contact body provided with a dome-shaped movable contact made of an elastic metal thin plate as an object to be inspected is subjected to a load smaller or larger than a prescribed value of a reversing operation force of the dome-shaped movable contact. A method of inspecting a movable contact body, wherein the movable contact body is pressed again by one of the two and then pressed again by the other load to determine whether the dome-shaped movable contact of the panel switch movable contact body is mounted and whether the reversing operation force is acceptable or not.