JPS6128348Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a snap mechanism for a micro switch.

Conventionally, this type of micro switch has not been developed.
That is, as shown in FIG. 5, two side legs 4 are fixed to a common terminal 3.
A snap mechanism is constituted by a movable piece 6 and a reversing spring 5 which are engaged with the springs 4a and 4b, respectively, and a push button 7 which is inserted into a hole in the top cover 2 of the case.

In the above conventional example, the assembly work steps include attaching the common terminal 3 to the case body 1, attaching the movable piece 6 to the fixed side legs 4a and 4b of the common terminal 3, and inserting the push button 7 into the hole in the upper cover 2. It was necessary to attach the top cover 2 to the case body 1 in the inserted state.
Therefore, since the above-mentioned parts are sequentially assembled into the case body 1 in the limited space inside the case, the ease of assembly is extremely poor, and it is difficult to automate the assembly.

This invention improves the above problem by making it possible to assemble the mechanical part consisting of the common terminal, movable piece, and push button separately from the case body, increasing the efficiency of assembly work and The purpose is to facilitate the automation of

This invention will be explained below with reference to the drawings.

1 and 2 are a front view and a sectional view taken along the line A--A, respectively, showing an embodiment of the microswitch of this invention. 1 is a snap mechanism housing recess 1a, a push button sliding groove 1b, and terminal press-fitting grooves 1c, 1d,
A case 1e is provided, and 2 is a cover for closing the case 1. 3 is the terminal press-fit groove 1c of case 1
It is a common terminal that is press-fitted and held in the base 3a that extends vertically, a pair of dividing pieces 3b, 3b horizontally bent from the upper end of the base 3a, and the separating pieces 3b, 3b.
It is formed from a hanging piece 3c bent downward from the tip in parallel with the base. Engagement grooves 3d and 3e are formed on the outside of the base 3a and hanging piece 3c of the common terminal, respectively. 4,5
The movable piece 4 has an opening 4a in the center, and the inner edge 4b of the opening is engaged with the engagement groove 3d of the common terminal 3. The reversing plate spring 5 is integrally formed with the movable piece 4, and its end portion is engaged with the engagement groove 3e of the hanging piece 3c of the common terminal 3.
A movable contact 6 is fixed to the free end of the movable piece 4, and is disposed between a pair of fixed terminals 7 and 8 that are press-fitted into the terminal press-fit grooves 1d and 1e of the case 1. 9 is the notch width I between each of the divided pieces 3b, 3b.
It has a wider base portion 9a and the base portion 9
It is a push button having an operation part 9b which is narrower than the notch width I1 and which projects upward from the upper surface of a.
3b, and the operating section 9b is placed on the movable piece 4 facing the divided pieces 3b, 3b.
It is positioned to protrude upward from between. This pushbutton 9 is connected to the pushbutton sliding groove 16 of the case 1.
It is designed to be able to move up and down by being guided by.
Next, to explain how to assemble the common terminal 3, movable piece 4, reversing leaf spring 5, and push button 9, first insert the push button 9 from below the common terminal 3, and then connect the operating portion 9b of the push button 9 to the common terminal. The terminal 3 is made to protrude upward from between the divided pieces 3b, 3b, and the top surface of the base portion 9a is brought into contact with the back surface of the common terminal 3. Next, the base 3a of the common terminal 3 is inserted into the opening 4a of the movable piece 4, and the inner edge 4b of the opening of the movable piece 4 is engaged with the engagement groove 3d of the common terminal 3.
By engaging the end of the reversing leaf spring 5 with the engagement groove 3e of the hanging piece 3c of the common terminal 3, the movable piece 4 is urged upward by the spring force of the reversing leaf spring 5, and the push button 9 is press-contacted to the common terminal 3. In this way, the movable piece 4, the reversing leaf spring 5, and the push button 9 are integrally held with respect to the common terminal 3.

This device consists of a base extending vertically, a pair of divided pieces bent horizontally from the upper end of the base, and a hanging piece bent downward from the tip of the divided piece parallel to the base. An engaging part is provided at the base, while a common terminal is provided with an engaging groove in the hanging piece at a position approximately parallel to the engaging part, and a movable contact is provided at the tip, and the outer periphery and the tip are integrally connected from the tip to the rear end side. A substantially square-shaped movable piece made of a flat plate with an opening in the center so as to leave a protruding reversal spring, and a base part wider than the notch width between each of the above-mentioned divided pieces, and from the top surface of the base part. a push button that protrudes upward and has an operating portion narrower than the width of the notch, the inner end edge of the rear end of the movable piece being engaged with the engaging portion of the base of the common terminal, and the reversing spring is engaged with the engagement groove of the hanging piece of the common terminal, so that the base part of the push button is placed between the divided piece and the movable piece, and the common terminal and the movable piece are connected to the push button. It is characterized in that the button is held under pressure.

Therefore, according to this invention, the common terminal, the movable piece, and the push button can be temporarily fixed to each other, which makes it possible to handle these as one component, which facilitates component management and further improves assembly work efficiency. improves. Moreover, by integrating the three parts, the assembly process is simplified and assembly automation becomes easier.

[Brief explanation of drawings]

1 and 2 are a front view and a sectional view taken along the line A--A of an embodiment of the microswitch of this invention, and FIG. 3 is a perspective view showing the main parts of the microswitch of this invention. FIG. 4 is a drawing showing a conventional example. 3... Common terminal, 3a... Base, 3b... Divided piece, 3c... Hanging piece, 3d... Engaging portion, 3e...
Engagement groove, 4...Movable piece, 5...Reversal spring, 9...
Push button, 9a...stand part, 9b...operation part.

Claims (1)

[Scope of utility model registration request] It consists of a base extending vertically, a pair of divided pieces bent horizontally from the upper end of the base, and a hanging piece bent downward parallel to the base from the tip of the divided piece and engaged with the base. A common terminal is provided with an engaging groove in a position substantially parallel to the engaging part in the hanging piece, and a reversing spring is provided with a movable contact at the tip and protrudes integrally from the outer periphery and the tip to the rear end side. a substantially rectangular movable piece made of a flat plate with an opening in the center so as to leave a gap, and a base part wider than the notch width between each of the divided pieces, and protrudes upward from the top surface of the base part. a push button having an operating part narrower in width than the notch width, the inner end edge of the rear end of the movable piece is engaged with the engaging part of the base of the common terminal, and the reversing spring is connected to the common terminal. By locking in the engagement groove of the hanging piece, the base part of the push button is placed between the divided piece and the movable piece, and the push button is clamped between the common terminal and the movable piece. A micro switch characterized by being made to hold.