MANUFACTURING METHOD OF PUSH-BUTTON SWITCH
First Claim
1. A manufacturing method of a push-button switch, comprising:
- a preparation step of preparing a key top, a pressing element that is attached to a back surface of the key top, and a reinforcing plate having a plate through hole that is larger than an outer periphery of the pressing element;
a pressing-element insertion step of inserting one end in an axial direction of the pressing element into a lower-mold recess for the pressing element, which is provided in a surface of a lower mold;
a reinforcing plate placing step of placing the reinforcing plate in the lower mold so that the pressing element extends through the plate through hole of the reinforcing plate;
a mold clamping step of moving an upper mold and the lower mold toward each other so as to insert the other end of the pressing element into an upper-mold recess for the pressing element, which is provided in a lower surface of the upper mold;
an introducing step of introducing an elastic member, which contains a component that does not adhere to the upper and lower molds but adheres to the pressing element, into a cavity formed between the upper and lower molds;
a molding step of, after the introducing step, pressing and holding the upper and lower molds at a predetermined temperature for a predetermined time, and then opening the upper and lower molds to remove a molded product in which an intermediate portion in the axial direction of the pressing element is supported in the plate through hole by the elastic member; and
an attaching step of attaching the back surface of the key top to the one end of the pressing element in the molded product.
1 Assignment
0 Petitions
Accused Products
Abstract
In a manufacturing method of a push-button switch, a key-top end of a pressing element 25 is inserted into a lower-mold recess for the pressing element, which is provided in a surface of a lower mold. A reinforcing plate 28 is placed in the lower mold so that the pressing element 25 extends through a plate through hole of the reinforcing plate 28. An upper mold and the lower mold are moved toward each other so as to insert the other end of the pressing element 25 into an upper-mold recess for the pressing element, which is provided in a lower surface of the upper mold. A liquid silicone rubber 27, which contains a component that does not adhere to the upper and lower molds but adheres to the pressing element 25, is introduced into a cavity. After the upper and lower molds are pressed and held at a predetermined temperature for a predetermined time, the upper and lower molds are opened to remove a molded product in which an intermediate portion in an axial direction of the pressing element 25 is supported in the plate through hole by the silicone rubber 27. A back surface of a key top 26 is attached to the key-top end of the pressing element 25 in the molded product. Thus, the pressing element and the elastic member are easily and reliably integrally molded by using the elastic member, and durability of the push-button switch is improved.
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Citations
9 Claims
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1. A manufacturing method of a push-button switch, comprising:
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a preparation step of preparing a key top, a pressing element that is attached to a back surface of the key top, and a reinforcing plate having a plate through hole that is larger than an outer periphery of the pressing element; a pressing-element insertion step of inserting one end in an axial direction of the pressing element into a lower-mold recess for the pressing element, which is provided in a surface of a lower mold; a reinforcing plate placing step of placing the reinforcing plate in the lower mold so that the pressing element extends through the plate through hole of the reinforcing plate; a mold clamping step of moving an upper mold and the lower mold toward each other so as to insert the other end of the pressing element into an upper-mold recess for the pressing element, which is provided in a lower surface of the upper mold; an introducing step of introducing an elastic member, which contains a component that does not adhere to the upper and lower molds but adheres to the pressing element, into a cavity formed between the upper and lower molds; a molding step of, after the introducing step, pressing and holding the upper and lower molds at a predetermined temperature for a predetermined time, and then opening the upper and lower molds to remove a molded product in which an intermediate portion in the axial direction of the pressing element is supported in the plate through hole by the elastic member; and an attaching step of attaching the back surface of the key top to the one end of the pressing element in the molded product. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification