JPH09120740A - Push switch - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a horizontal push-type push switch having a simple structure, excellent assembling property, small size, thin shape, and high mounting efficiency. A cover (2), a push button (3) for pressing to make a switch, a hollow cylindrical spacer (4), an elastic disk-shaped dust cover (5), and a good conductive conductor having springiness. Contact blade 6 and terminal 8
A push switch (1) which is integrally formed with a terminal (9) and is fitted with a cover (2) to form a switch case.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push switch for surface mounting in which a cover and a base mold are fitted to each other, and more particularly to a push type push switch having a chip mounter having a suction nozzle with high mounting efficiency.

[0002]

2. Description of the Related Art A small-sized and low-cost push switch that can be surface-mounted on a printed wiring board has been put into practical use and widely used in various fields. For example, pushing the operation part of the push button from the lateral direction to move the contact point with springiness, contacting the other fixed contact to electrically connect and conduct, and to apply the lateral direction to the operation part of the push button. 2. Description of the Related Art There is known a push switch having a structure in which, when the pressing force of the contact is released, the contact is elastically restored by the spring force of the contact to open the electrical connection of the contact.

FIG. 5 is an external view of a conventional push switch,
FIG. 6 shows a sectional view of this push switch.

In FIGS. 5 and 6, the push switch 1
Reference numeral 0 designates a normal break contact type switch of one circuit, which is integrally formed with the cover 12 to hold down the hinge 1
2A, a displacement direction conversion means having an operation portion 13A for pushing the switch from the lateral direction to perform a make operation of the switch and a push button 13 including a flexible hinge portion 13C, and a disk-shaped dust cover 15 having elasticity. A base mold 1 for forming a case of the push switch 10 by fitting a contact blade 16 of a good electric conductor having a spring property, a terminal 18 and a terminal 19 integrally with each other and a cover 12.
And 7.

The displacement direction converting means is a push button operating section 1.
A lateral displacement operation by 3A is converted into a longitudinal displacement by a hinge portion 13C which is formed with flexibility and a hinge pressing portion 12A, and the contact blade 16 is pushed downward to lower the contact blade 16 and the contact 18A. By making contact, electrical connection / conduction (make state) is made.

The contact blade 16 has a curved disk shape, and the springiness of the curved portion causes the push button 1 to move.
3 When the pressing force of the hinge portion 13C is released at the time of restoration, it self-returns to a curved disc shape.

The contact 18A forms a disk-shaped contact and is arranged at the center of the inner bottom surface of the base mold 17, and the hinge portion 13C of the push button 13 is pushed down and the curved upper surface of the contact blade 16 is pushed down to make contact. In this case, terminal 19 → contact blade 16 → contact 18A →
The terminal 18 is electrically connected / conductive, the push switch 1 is in a make state, and the terminals 18 and 19 are electrically connected / conductive.

[0008]

With the miniaturization and thinning of the device, high-density mounting on a printed wiring board is promoted, and accordingly, further miniaturization of mounted parts is required and miniaturized. A chip mounter that mounts mounted components on a printed wiring board is required to have higher accuracy.

In order to reduce the cost and reduce the number of constituent parts of the mounted parts, the conventional push switch has a notch in its cover and a hinge pressing part is integrally formed with the cover. However, when adsorbing a miniaturized push switch with the adsorption nozzle of the chip mounter, the shape and structure of the cover top surface, which is the adsorption surface, poses a problem, especially the holes such as cutouts on the top surface of the push switch cover shown in the conventional example. If so, there is a problem that a suction error is likely to occur and the reliability of surface mounting by the chip mounter is impaired.

The present invention has been made to solve the above problems, and its purpose is to provide a simple structure, excellent assemblability, small size and thin shape, and a hinge integrally formed with an operating portion of a push button. Displacement direction conversion including a push-down portion, a spacer having a flexible hinge portion and a hinge inclined portion for converting a lateral displacement of the hinge push-down portion into a vertical displacement at a tip portion of the hinge portion By providing a means, a notch is removed from the upper surface of the cover, which is the suction surface, to form a flat plate shape, and the entire surface of the cover is used as the suction surface. To provide a switch.

[0011]

In order to solve the above-mentioned problems, a push switch according to the present invention comprises a push-button including a hinge push-down portion provided on a push button and a hinge portion having a hinge slanted portion provided on a spacer. Of the chip mounter is provided with a displacement direction conversion means for converting the lateral displacement operation by the operation unit of the above into a vertical displacement to bring the contact blade and the contact into contact to make an electrical connection, and the top surface of the cover is formed into a flat plate shape. It is characterized in that the cover is sucked by the suction nozzle.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an external view of a push switch according to the present invention, FIG. 2 is a sectional view of the push switch according to the present invention, and FIG. 3 is an assembly view of the push switch according to the present invention.

1 to 3, the push switch 1
Is a normal break contact type switch with one circuit, and a cover 2 and a push button 3 for pushing the switch from the lateral direction to make a switch, and a spacer formed with a flexible hinge portion 4A and stoppers 4C and 4E. 4, a disk-shaped dust cover 5 having elasticity, a contact blade 6 of a good electric conductor having a spring property, a terminal 8 and a terminal 9, which are integrally formed with each other, and are fitted with the cover 2 to push the switch 1. And a base mold 7 that forms the case. The cover 2 has an upper surface formed in a flat plate shape and is provided with four engaging portions 2A facing each other on its side surfaces. The engaging portion 2A is engaged with the notch portion 7B of the base mold 7 to form the case of the push switch 1. Is formed.

The push button 3 includes an operating portion 3A for laterally operating the switch, a stopper 3B for determining a stroke for operating the switch and limiting an excessive pushing stroke due to an excessive operating force, and a hinge inclined portion 4B. A hinge push-down portion 3C that pushes down the hinge portion 4A in the right-angled lower direction while coming into contact with and sliding is integrally molded.

The spacer 4 is arranged such that the outer peripheral portion thereof contacts the inner peripheral portion of the base mold 7, the dust cover 5 is sandwiched between the steps provided in the lower portion of the base mold 7, and the upper portion is pressed by the cover 2. Fixed.

Further, the spacer 4 is formed with flexibility, and a hinge portion 4A for pushing down the contact blade 6 by performing a hinge operation according to a lateral displacement of the hinge pushing portion 3C and a hinge pushing down portion. A hinge inclined portion 4B that flexibly displaces the hinge portion 4A downward by receiving the lateral displacement of the portion 3C, and a stopper 4C that limits an excessive lateral pushing stroke due to an excessive operating force of the operating portion 3A,
4E and 4E are integrally molded.

The displacement direction converting means is composed of a hinge depressing portion 3C provided on the push button 3 and a hinge portion 4A having a hinge slanting portion 4B provided on the spacer 4, and the lateral displacement operation by the operating portion of the push button is performed. It is converted into a vertical displacement and the contact blade and the contact are brought into contact with each other for electrical connection.

The dust cover 5 is made of a disc-shaped material having elasticity and is fixed to the base mold 7 by the spacer 4. The dust cover 5 and the inside of the base mold 7 in which the contact blade 6 is arranged are hermetically sealed. A space is formed, and the contact blade 6 and the contact point 8A in this closed space are prevented from being mixed with dust and dust from above by the dust cover 5.

The bottom surface of the dust cover 5 contacts the curved upper surface of the contact blade 6 to support the contact blade 6 on the base mold 7.

Furthermore, when the operating portion 3A of the push button 3 is pushed and the hinge portion 4A is pushed down, the elasticity of the material forming the dust cover 5 pushes down the hinge portion 4A via the dust cover 5. The force pushes the contact blade 6 down, and the contact blade 6 and the contact 8A come into contact with each other to establish an electrical connection / conduction (make state).

The contact blade 6 is made of a good electric conductor material having a small electric resistance and is formed into a disc shape. The contact blade 6 is curved so that the vicinity of the center of the disc has the maximum size. When the pressing force of the portion 4A is released, it self-returns to a curved disc shape. When the push switch 1 is in the normal state, there is no pressing force of the hinge portion 4A, and the contact blade 6 holds the curved disc shape.

The base mold 7 is made of a molding material, and integrally forms a terminal 8, a contact 8A having continuity with the terminal 8, and a terminal 9 having continuity with the contact blade 6.
Protrusions 7C for positioning are provided on the inclined portion 7A, the cutout portion 7B and the printed wiring board.

The inclined portion 7A is formed such that the lower portion of the base mold 7 is wide, and when the push switch 1 is covered with the cover 2 at the final stage of assembly, the engaging portion 2A of the cover 2 is guided to move the engaging portion 2A to the outside. By unfolding, the cover 2 is locked and fixed to the notches 7B of the base mold 7 and the claws formed at the bottom of the inclined portion 7A by the spring force acting on the inside of the four facing locking portions 2A. .

The terminal 8 is formed of a good electric conductor material that is electrically connected to the contact 8A of the good electric conductor formed on the inner bottom surface of the base mold 7. The terminal 8 is taken out of the base mold 7 for external attachment of the push switch 1. The terminals are formed and surface-mounted by soldering on the land pattern of the printed wiring board.

The terminal 9 is formed on the inner bottom surface of the base mold 7 and is made of a good electric conductor material which is electrically connected to the contact of the good electric conductor which is always connected to the contact blade 6. Of the push switch 1 to form an external mounting terminal, and is surface-mounted by soldering to the land pattern of the printed wiring board.

The contact 8A forms a disk-shaped contact and is arranged at the center of the inner bottom surface of the base mold 7. When the push button 3 is pushed down and the curved upper surface of the contact blade 6 is pushed down and comes into contact, the terminal 9 is formed. → contact blade 6 → contact 8A → terminal 8 is electrically connected and conductive, push switch 1 is in a make state and terminal 8
And the terminal 9 are electrically connected / conductive.

As described above, in the push switch according to the present invention, the hinge push-down portion integrally formed with the operation portion on the push button, and the flexibility integrally formed with the spacer for supporting and positioning the push button. With a hinge part,
Since the tip end portion of the hinge portion is provided with the hinge slant portion that converts the force in the moving direction of the hinge pressing portion into the right angle direction, the operation force from the lateral direction can be converted into the right angle direction and is integrated with the spacer. Since the hinge part formed in 1 has flexibility, the spring parts are not required and the number of parts can be reduced.

As shown in FIG. 3, the push switch 1 is assembled by setting the base mold 7, placing the contact blade 6 inside the base mold 7, and then placing the dust cover 5 on the step inside the base mold 7. , The spacer 4 is stacked on the dust cover 5, and the push button 3 is arranged on the spacer 4 so that the stopper 4C of the spacer 4 and the stopper 3B of the push button 3 are fitted to each other. The mold 7 is locked to complete the process.

As described above, a push switch having a small number of parts, simple unidirectional assembly, and a dustproof structure can be constructed.

FIG. 4 is an operation diagram of the push switch according to the present invention. Next, the operation of the push switch according to the present invention will be described with reference to FIGS.

FIG. 2 shows the push switch 1 in a normal state. In the normal state in which the push button 3 is not operated, the hinge pressing portion 3C is not displaced, so that the hinge portion 4A is kept in a non-deformed state without being elastically deformed, and due to the spring property of the contact blade 6, the dust cover 5 and An upward spring force acts on the hinge portion 4A, and the hinge portion 4A
A contacts the cover 2 and is in balance. In this balance state, the dust cover 5 is kept substantially horizontal.

Further, the protrusion 4D provided on the bottom surface of the hinge portion 4A is positioned so as to come into contact with the upper surface of the dust cover 5 as shown in FIG. 2, and comes into contact with the lower surface of the dust cover 5 in the normal state. It is pushed upward by the spring force of the contact blade 6.

Subsequently, when the push button 3 is pushed in the lateral direction, the hinge depressing portion 3C integrally formed with the push button 3 is displaced in the lateral direction, and the tip of the hinge depressing portion 3C is displaced according to the displacement of the hinge depressing portion 3C. Pushes the hinge inclined portion 4B laterally and pushes the hinge portion 4A downward while the corner 3D slides on the surface of the hinge inclined portion 4B. The flexible hinge portion 4A is bent and elastically deformed to be pushed downward.

In FIG. 4, the protrusion 4D on the bottom surface of the hinge portion 4A which is in contact with the contact blade 6 through the dust cover 5 pushes down the central portion of the dust cover 5 downward, Since the outer periphery is fixed by the spacer 4 and the dust cover 5 itself has elasticity, the displacement by the protrusion 4D is directly transmitted to the central portion of the contact blade 6 without impairing the dustproof property.

Since the contact blade 6 is formed of a good electric conductor having a spring property, the central portion of the contact blade 6 is deformed downward so as to come into contact with the contact 8A arranged on the inner bottom surface of the base mold 7 and contact the contact blade 6. Since the contact 8A is electrically connected and electrically connected, the terminal 9 electrically connected to the contact blade 6 and the terminal 8 electrically connected to the contact 8A are electrically connected to form the make state of the push switch 1. The make state is maintained while the push button 3 is pushed and the contact blade 6 and the contact 8A are in contact with each other.

Next, when the operating force of the push button 3 is released to remove the pushing force, the bending force of the hinge portion 4A is released, the hinge portion 4A is returned to the normal position, and the push button 3 is also in the normal position. Back, and the spring force of the deformed contact blade 6 restores the dust cover 5.
Then, the hinge portion 4A is lifted upward, and the hinge portion 4A comes into contact with the cover 2 to be in a balanced state.

The push switch 1 is electrically disconnected when the contact blade 6 and the contact 8A are no longer in contact with each other to be in a break state.

7A and 7B are schematic views of the push switch and the suction nozzle of the chip mounter. As is clear from this figure, since the notch is removed from the top surface of the cover that is the suction surface of the push switch to form a flat plate, and the entire top surface of the cover is the suction surface, the suction area can be increased, It can be surely sucked by the suction nozzle of the mounter.

It should be noted that the present invention is conceivable in various embodiments other than the above-mentioned embodiment, but all of them are included in the present invention.

[0040]

As described above, the push switch according to the present invention is integrally formed with the hinge push-down portion formed integrally with the operating portion on the push button and the spacer for supporting and positioning the push button. Since the displacement direction converting means including the flexible hinge part and the hinge inclined part for converting the lateral displacement of the hinge pressing part into the longitudinal displacement is provided at the tip of the hinge part, Is simple and easy to assemble, it is small and thin, it is formed as a flat plate without notches from the top surface of the cover, and the entire top surface of the cover is used as the suction surface. A push switch can be provided.

Therefore, it is possible to provide a push switch having a simple structure, excellent assembling property, small size and thin shape, and suitable for surface mounting.

[Brief description of the drawings]

FIG. 1 is an external view of a push switch according to the present invention.

FIG. 2 is a sectional view of a push switch according to the present invention.

FIG. 3 is an assembly diagram of a push switch according to the present invention.

FIG. 4 is an operation diagram of a push switch according to the present invention.

FIG. 5 is an external view of a conventional push switch.

FIG. 6 is a sectional view of a conventional push switch.

FIG. 7 is a schematic diagram of a push switch and a suction nozzle of a chip mounter.

[Explanation of symbols]

1 ... Push switch, 2 ... Cover, 2A ... Locking part, 3
... push button, 3A ... operating part, 3B ... stopper, 3C ... hinge pressing part, 3D ... corner, 4 ... spacer, 4A ... hinge part, 4B ... hinge slanting part, 4C, 4E ... stopper,
4D ... Projection part, 5 ... Dust cover, 6 ... Contact blade, 7 ... Base mold, 7A ... Inclined part, 7B ... Notch part, 7C ... Positioning projection, 8, 9 ... Terminal, 8A ... Contact point, 10 ... Push switch , 12 ... Cover, 12A ...
Hinge push down part, 13 ... Push button, 13A ... Operation part, 1
3C ... Hinge part, 15 ... Dust cover, 16 ... Contact blade, 17 ... Base mold, 17C ... Positioning projection, 18, 19 ... Terminal, 18A ... Contact, 30 ... Adsorption nozzle.

Claims (1)

[Claims] 1. A push switch for surface mounting, comprising a cover and a base mold fitted together, wherein a contact blade having a spring property is pushed down in accordance with an operation of an operation portion of a push button, and the contact blade and the contact are connected. In the push switch for electrically disconnecting the contact blade and the contact by the spring property of the contact blade, the push switch is operated by pressing the push button. A horizontal direction displacement operation by a section is converted to a vertical direction displacement, the contact blade and a contact are brought into contact with the displacement direction conversion means for making an electrical connection, the upper surface of the cover is formed into a flat plate shape, A push switch, wherein the suction nozzle sucks the cover.