JPS6140037Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an illuminated push button switch that indicates a switch by illumination from a lamp, and includes an extension piece 2 that projects outward from the upper end of a mounting base 1, and A cylindrical illumination case 4 is formed by extending the illumination part 3 upward from the tip, and a bearing protrusion 8 that pivotally supports the shaft 7 of the lamp holder 6 to which the lamp 5 is attached and a locking protrusion 9 of the lamp holder 6 are attached. A locking stepped portion 10 for locking is provided on the inner surface of the illumination portion 3, and a through hole 11 formed by a spacer 14 of an injection mold when molding the lamp holder 6 by injection molding is connected to the bearing protrusion 8. The extending piece 2 is located at the lower position of the locking step 10.
This is an illuminated push button switch which is provided with openings at the top and bottom, and in which the mounting base 1 of the illumination case 4 is attached to the switch block 12 and the lamp 5 is connected to the switch block 12.

For conventional illuminated push button switches that are divided into an illuminated case and a switch block,
When a cylindrical lighting case is formed by injection molding of synthetic resin, the inner circumference of the lighting case has a bearing protrusion for pivotally supporting the lamp holder and a locking step to prevent the lamp holder from popping up. Therefore, the illumination case must be formed to have the same diameter from top to bottom so that the upper bearing protrusion and the locking step do not interfere with the cutting process from the mold. Therefore, it is only possible to use a lighting case that has the same diameter as the switch block that is suitable for mounting on the switch block, and even when using a large push button, it is not possible to use a lighting case that is larger than the switch block.

The present invention has been developed in view of the above points, and is designed to have a diameter larger than that of the mounting base in order to attach the lighting part of the lighting case to the switch block without the bearing protrusion or locking step becoming a hindrance. It is an object of the present invention to provide an illuminated push button switch which can be used in combination with illumination cases of various sizes for one type of switch block.

The present invention will be explained in detail below with reference to Examples. The illumination case 4 is formed into a cylindrical shape that opens upward and downward.
An extension piece 2 extends outward from the upper end of the mounting base 1, and a lighting section 3 extends upward from the tip of the extension piece 2, and is integrally formed of a synthetic resin material. Therefore, the diameter of the illuminating portion 3 is made larger than the diameter of the mounting base 1 by the amount by which the extension piece 2 projects outward, and the diameter of the mounting base 1 is made the same as the diameter of the switch block 12. A shaft 7 is protruded from one end of the lamp holder 6 in which the lamp 5 is housed, and a locking protrusion 9 is protruded from the other end. A bearing protrusion 8 is protruded from the inner surface of the illumination part 3 of the illumination case 4, and the shaft 7 of the lamp holder 6 is pivotally attached to the bearing protrusion 8. Further, a locking step 10 is formed on the inner surface of the illumination section 3, and the lamp holder 6 is attached to the locking step 10.
A locking protrusion 9 is locked. The above-mentioned illumination case 4 is manufactured by injection molding of a synthetic resin material, and there are bearing protrusions 8 and engagements at the lower positions of the bearing protrusion and the locking step 10 of the extension piece 2 of the illumination case 4, respectively. Through holes 11, 11 having the same width as the width of the stop part 10 are bored, and as shown in FIG. Inject resin into
By splitting the upper mold 15 and the lower mold 13, a bearing protrusion 8 and a locking step 10 are formed between the spacer parts 14, 14 of the lower mold 13 and the upper mold 15. Through-holes 11, 11 are formed by spacer parts 14, 14 by cutting the lower mold 13. As described above, the presence of the through hole 11 allows the spacer part 14 of the lower mold 13 to be used, and even if the diameter of the illumination part 3 is larger than the diameter of the mounting base 1 in the illumination case 4, the bearing protrusion 8 and Locking step part 1
The upper and lower molds 13 and 15 can be cut out without the 0 part getting caught, and the diameter of the illumination part 3 can be formed to an arbitrary diameter larger than the diameter of the mounting base 1. Note that the spacer portion 14 may be formed separately from the lower mold 13 so as to be independent, and when the spacer portion 14 is made an independent member in this way, the spacer portion 14 can also serve as an ejection pin. The illumination case 4 formed as described above is mounted on the upper surface of the switch block 12 as shown in FIG. Reference numerals 16 and 17 in FIG. 1 are lamp terminals, and the lamp terminal 16 also serves as a push-up spring that pushes up the lamp holder 6. Further, a push button 18 is attached to the upper part of the illumination case 4. A push button shaft 19 is attached to the inner surface of the push button 18, and the push button shaft 19 is connected to a reversing switch mechanism 20 having a reversing spring 21 inside the switch block 12. By pressing down the push button 18, the reversing switch mechanism 20 is turned on to illuminate the lamp 5, thereby indicating that the illumination push button switch is on.

As mentioned above, in the present invention, by providing the through hole 11, the mold can be removed without being caught by the bearing protrusion 8 or the locking step 10, and is compatible with the switch block 12. The diameter of the illumination part 3 can be made larger than the diameter of the mounting base 1. For example, in order to improve operability,
If you want to make 8 into a larger one,
A lighting case 4 having a lighting section 3 of a size suitable for the push button 18 can be attached to the switch block 12, and lighting cases 4 of various sizes can be attached to the same type of switch block 12 to create a variety of types. It is possible to form an illuminated push button switch. In addition, the lighting case can be communicated between the inside and outside through the through hole formed in the extension piece, and the hot air inside the lighting case, which has a lamp inside and tends to trap heat generated by the lamp, can be passed through the hole. The hot air inside the lighting case can be discharged by directly using the through hole formed for mold cutting.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of the present invention, Fig. 2 is a partially cutaway perspective view of the same lighting case as above, Fig. 3 is a partially cutaway sectional view of the same as above, and Fig. 4 shows the molding of the lighting case. In the cross-sectional view, 1 is a mounting base, 2 is an extension piece, 3 is a lighting section, 4 is a lighting case, 5 is a lamp,
6 is a lamp holder, 7 is a shaft, 8 is a bearing protrusion, 9
1 is a locking protrusion, 10 is a locking step, 11 is a through hole, 12
14 is a switch block, and 14 is a spacer for a molding die.

Claims (1)

[Scope of utility model registration request] A cylindrical lighting case is formed by extending an extension piece projecting outward from the upper end of the mounting base and extending an illumination part upward from the tip of the extension piece, and forming a shaft of a lamp holder with a lamp attached thereto. A bearing protrusion that pivotally supports the lamp holder and a locking step that locks the locking protrusion of the lamp holder are provided on the inner surface of the illumination part, respectively, and are formed using the spacer of the injection mold when molding the lamp holder using the injection molding method. An illuminated push button is constructed by providing a vertically opening through hole in the extension piece at a position below the bearing protrusion and the locking step, attaching the mounting base of the illumination case to the switch block, and connecting the lamp to the switch block. Switch.