JP2000222971A - Switch and switch fixing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switch dispensing with coating of a flux spreading preventing agent with high productivity and low cost. SOLUTION: This switch has almost a rectangular parallelepiped-shaped housing 1 made of an insulating molding product; an operating part fixed to the front of the housing 1; and terminal plates 2, 3 embedded in the housing 1 and projecting to the outside of the housing 1 from a lower surface part 1e of the housing 1; and a flux introduction means 1g extending to the lower surface part 1e is installed in a side surface part 1c of the housing 1, and thereby, spreading of flux to an operation part 9 can be prevented with the flux introduction part 1g, coating of a flux spreading preventing agent is made unnecessary, and a switch with high productivity and low cost can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch used for audio equipment and the like, and a switch mounting structure.

[0002]

2. Description of the Related Art A conventional switch and a switch mounting structure will be described with reference to FIGS. 13 to 15. A box-shaped housing 51 is made of a molded product of a synthetic resin as an insulating material. , First and second terminal plates 5
2, 53 are buried. Then, as shown in FIG. 15, the first and second terminal plates 52 and 53 are respectively formed from a hoop material F2 of a metal plate having a width B3 by contact points 52a and 5a.
3a and the terminal portions 52b and 53b are formed by punching, and the hook portions 52c and 53c are provided near the ends of the terminal portions 52b and 53b. Further, the first and second terminal plates 52 and 53 expose the contact portions 52a and 53a in the concave portion 51a of the housing 51, and the terminal portions 52b and 53b are projected from both side portions 51b of the housing 51. 13 and 14, the terminal portions 52b and 53b are formed by bending the terminal portions 52b and 53b along the side portions 51b, and as shown in FIG. 53b is in a state of protruding from the width B4 of the lower surface portion 51c of the housing 51.

An operating portion 54 is movably mounted on a front portion 51d of the housing 51 by a mounting plate 55. Although not shown here, a circular dish-shaped movable contact is provided in the concave portion 51a of the housing 51, and the movable contact is always provided on the contact portion 52a of the first terminal plate 52. When the contact is made and the operation part 54 is pressed, the operation part 54 presses the center part of the movable contact to invert the center part of the movable contact. As a result, the center portion is brought into contact with the contact portion 53a of the second terminal plate 53 to turn on the first and second terminal plates 52, 53, and the movable portion is released when the pressing of the operation portion 54 is released. The contact is self-recovered, separates from the contact portion 53a, and turns off the first and second terminal plates 52, 53.

As shown in FIGS. 13 and 14, the mounting of the switch having such a structure is performed by mounting the terminal portions 52b and 53 of the first and second terminal plates 52 and 53 on the printed circuit board 56 with holes. 56a, and is inserted into the lower surface 5 of the housing 51.
1c is placed on the printed circuit board 56. Then, the U-shaped latch portions 52c and 53c are pulled out from the holes 56a,
The switch is locked to the printed board 56 by being hooked at the corner of the hole 56a. At this time, since the latch portions 52c and 53c are formed in a direction perpendicular to the plate surface direction of the first and second terminal plates 52 and 53, the flexibility at the time of inserting the terminal portions 52b and 53b is improved. Although good, the locking strength in the locked state is low.

Next, with the switch locked, the printed circuit board 56 is conveyed to a soldering device, and the terminal portions 52b and 53b of the switch are connected to a conductive pattern (not shown) provided on the lower surface of the printed circuit board 56. Solder to At the time of this soldering,
Since the flux rises up to the switch housing 51 through the hole 56a and the terminal portions 52b and 53b, and the flux deteriorates the operation of the operation portion 54, a flux rise preventing agent is applied to the switch in advance. It has become something. In particular, the use of a flux rise preventing agent is indispensable because the gas generated during soldering further promotes the rise of the flux. Further, with the pressure of this gas, the terminal portions 52b, 5c are held in a state where the locking portions by the latch portions 52c, 53c are slightly lifted.
This is an undesirable situation where 3b is soldered.

[0006]

In the conventional switch, it is necessary to apply a flux rise preventing agent. Therefore, not only is the work of applying the flux rise preventing agent troublesome, but also the operation increases the cost. Problem.

[0007]

As a first means for solving the above-mentioned problems, a substantially rectangular parallelepiped housing made of a molded product of an insulating material, an operation unit attached to a front portion of the housing, and A terminal plate that is embedded and attached to the housing and protrudes out of the housing from a lower surface of the housing; and a side surface of the housing is provided with a flux guiding unit that reaches the lower surface. As a second solution, the flux guiding means is constituted by a vertical step formed by recessing the rear surface of the side surface from the front surface. As a third solution, the flux guiding means is formed flush with the surface of the terminal plate.

As a fourth solution, a substantially rectangular parallelepiped housing made of a molded product of an insulating material, an operation portion attached to a front portion of the housing, and a housing embedded and attached to the housing, A terminal plate protruding from the lower surface of the housing to the outside of the housing, and a notch extending to the lower surface is provided at a rear surface of the housing where the terminal plate is located, so that a rear surface of the terminal plate is partially exposed. The configuration was adopted. As a fifth solution, a flux guiding means is provided on the side surface of the housing to reach the lower surface, and the flux guiding means is arranged near the notch. As a sixth solution, the flux guiding means is constituted by a vertical step formed by recessing the rear surface of the side surface from the front surface. As a seventh solution, the flux guiding means is formed flush with the surface of the terminal plate. Further, as an eighth solution, the switch according to claim 4, or 5, or 6, or 7, and a printed board having a conductive pattern and a hole are provided, and the housing is mounted on the printed board. And the terminal portion is inserted into the hole of the printed circuit board, and the front side of the hole is closed by the lower surface, and the rear side of the hole is the notch. The terminal portion was soldered to the conductive pattern in a state where the terminal portion was opened.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A switch according to the present invention and a mounting structure of the switch will be described with reference to FIGS. 1 to 11. FIG. 1 is a front view of the switch of the present invention, and FIG. FIG. 3 is a sectional view taken along line 3-3 of FIG. 1, FIG. 4 is a sectional view taken along line 4-4 of FIG.
FIG. 6 is a front view showing a housing and a terminal plate according to the switch of the present invention, FIG. 6 is an explanatory view showing a method of manufacturing the switch of the present invention, and FIG. FIG. 8 is a front view showing the switch mounting structure of the present invention, FIG. 9 is a side view showing the switch mounting structure of the present invention, FIG. 10 is a rear view showing the switch mounting structure of the present invention, FIG. FIG. 2 is a sectional view of a main part showing a switch mounting structure of the present invention.

Next, a switch according to the present invention will be described with reference to FIGS. 1 to 7. A substantially rectangular parallelepiped housing 1 made of a molded insulating material has a front part 1a and a rear part facing the front part 1a. 1b, both side portions 1c located between the front portion 1a and the rear surface portion 1b, an upper surface portion 1d located between the both side portions 1c, and a lower surface portion facing the upper surface portion 1d and perpendicular to the front portion 1a. 1e. Also, the housing 1
A concave portion 1f provided in the front portion 1a,
That is, both side surfaces 1e extend from the lower surface 1e to the upper surface 1d.
c, a flux guiding means 1g and a cutout 1h provided in the lower surface 1e near the flux guiding means 1g such that the rear surface 1b is open. Further, the flux guiding means 1g is constituted by a vertical step wall formed by recessing the rear surface 1b side of the side surface 1c from the front surface 1a side, and the step wall is L in this embodiment. Although it is a mold, it may be formed by a U-shaped groove or the like.

A pair of first and second terminal plates 2 and 3 made of a metal plate include contact portions 2a and 3a and contact portions 2a and 3a.
terminal portions 2b, 3b connected to a, and tapered portions 2c, 3c having tapered tips at the ends of the terminal portions 2b, 3b.
And wide locking portions 2d and 3d formed to protrude in the plate surface direction. The pair of first and second terminal plates 2 and 3 are buried and attached to the housing 1 with the locking portions 2d and 3d facing each other and arranged on the same surface. I have. When the pair of first and second terminal plates 2 and 3 are attached to the housing 1, the contact portions 2a and 3a are exposed from the bottom surface of the recessed portion 1f, and the terminal portions 2b and 3b are connected to the lower surface. Within the width dimension B1 of the portion 1f, the projection protrudes out of the housing 1 from the notch 1h of the lower surface 1e, and a part of the rear surface of the terminal portion 2b, 3b is exposed in the notch 1h. . Further, the step portion serving as the flux guiding means 1g and the rear surfaces of the first and second terminal plates 2, 3 are formed flush with each other.

A method of manufacturing the housing 1 and the first and second terminal plates 2 and 3 will be described first.
As shown in FIG. 2, a hoop material F made of a single metal plate having a width dimension B2 is punched out, and the first and second terminal plates 2 and 3 are connected to each other, and the contact portions 2a and 3a and the terminals are formed. Part 2
b, 3b, tapered portions 2c, 3c, and locking portions 2d, 3d
To form Next, as shown in FIG. 7, the hoop material F is held at the joint (parting line) 6 between the first forming die 4 and the second forming die 5, and the first and the second are formed. Hot water of a synthetic resin, which is an insulating material, is injected into the hollow portions 7 of the molding dies 4 and 5 to form the housing 1 as shown by a two-dot chain line in FIG. As a result, the width dimension B2 of the hoop material F is located within the width dimension B1 of the lower surface portion 1e of the housing 1, and the pair of first and second terminal plates 2, 3 within the width dimension B1.
Is located. Also, this housing 1
When the second molding die 5 is formed, the second molding die 5 is provided with a stepped portion 5a slightly projecting toward the cavity 7 at the seam 6, and in this state, the housing 1 is formed by molding. In the step 5a, the side surface 1
The rear surface portion 1b side of c becomes a vertical step wall recessed from the front portion 1a side to constitute the flux guiding means 1g,
Further, the flux guiding means 1g and the rear surface of the hoop material F are flush with each other. Then, in FIG. 6, by cutting at the position of the line S, the coupling member of the housing 1 and the first and second terminal plates 2, 3 as shown in FIG. 5 is manufactured.

The movable contact 8 made of a dish-shaped metal plate
3 and 4, the recess 1 of the housing 1
f, the periphery of which is always the first terminal plate 2
The contact portion 2a of the second terminal plate 3 is in contact with the contact portion 3a of the second terminal plate 3 at normal times. The operating portion 9 made of a synthetic resin molded product has a flange portion 9a and a protruding portion 9b projecting rearward. The operating portion 9 is in a state where the protruding portion 9b is in contact with the movable contact 8. , Collar 9
a and the protrusion 9b are movably housed in the recess 1f. The rectangular support plate 10 made of a metal plate is placed on the front portion 1a of the housing 1 with the operation portion 9 inserted through the center hole 10a.
With the protrusion 1j provided at a being inserted through a hole (not shown) of the support plate 10, the tip of the protrusion 1j is widened (caulked) and attached to the housing 1. As a result, the operation unit 9 is movably attached to the housing 1.

In the switch having the above configuration, when the operating portion 9 is pressed against the spring property of the movable contact 8, the central portion of the movable contact 8 is pressed by the convex portion 9b, and the central portion is pressed. As a result, the central portion of the movable contact 8 comes into contact with the contact portion 3a of the second terminal plate 3, and the first and second terminal plates 2 and 3 are electrically connected to be in the ON state. Next, when the pressing of the operating portion 9 is released, the central portion of the movable contact 8 is reversed to the original state by the self-returning force of the movable contact 8, and the operating portion 9 is returned to the state before the pressing, and The contact of the terminal plate 3 from the contact portion 3a is separated, and the first and second terminal plates 2,
3 is in a non-conductive OFF state. Thus, the operation of the switch is performed.

Next, a description will be given of such a switch mounting structure with reference to FIGS. 8 to 11. A printed circuit board 11 serving as a switch mounting member has a plurality of rectangular shaped members formed at predetermined intervals. It has a hole 11a and a conductive pattern (not shown) provided on the lower surface including the periphery of the hole 11a. Then, the terminal portions 2 of the first and second terminal plates 2 and 3
When the locking portions 2d, 3d provided on the b, 3b are pressed into the holes 11a of the printed circuit board 11, the terminal portions 2b, 3b are moved along the tapered portions 2c, 3c as shown in FIGS. Expanded in the plate surface direction, that is, in the width direction of the lower surface portion 1e,
A state in which the switches are temporarily fixed to the printed circuit board 11 with the lower portions 1e of the housing 1 placed on the upper surface of the printed circuit board 11 while the locking portions 2d and 3d bite into the holes 11a to be locked. Become.

At the time of the temporary fixing, as shown by arrows in FIG. 8, the pair of first and second terminal plates 2 and 3 are locked by a reaction force acting so as to face each other in the plate surface direction. The strength is large. Further, at the time of this temporary fixing, as shown in FIG. 11, in the hole 11 a of the printed circuit board 11, the front part 1 a side and both side parts of the housing 1 are closed by the lower surface part 1 e of the housing 1. On the rear surface side, the notch 1h of the housing 1 is located, and the notch 1h communicates with the hole 11a. Then, in such a temporarily fixed state, the printed circuit board 11 is transported to a soldering device, and the terminal 2
b, 3b are soldered to a conductive pattern (not shown) provided on the lower surface of the printed circuit board 11. At the time of this soldering, the flux rises on the terminal portions 2b and 3b located at the notch portion 1h.

That is, the presence of the notch 1h guides the flux toward the rear surface 1b of the housing 1 and degass the gas generated during soldering. Further, as shown in FIG. 11, the flux that has risen on the terminal portions 2b and 3b is transmitted from the inner surface of the notch portion 1h to the rear surface portion 1b and reaches the side surface portion 1c, but has risen to the side surface portion 1c. The flux flows from the lower surface 1e to the upper surface 1d along the step wall as the flux guiding means 1g.
To prevent the flux from entering the front portion 1a with the flux guiding means 1g as a boundary. With such a configuration, the operation of the operation unit 9 can be reliably performed without applying a flux rise preventing agent to the switch, and even if gas is generated at the time of soldering, the locking units 2d and 3d can be applied to the printed circuit board 11. Since the locking strength is strong, the switch can be soldered without being lifted off the printed circuit board 11.

FIG. 12 shows another embodiment of the switch of the present invention. In this embodiment, a pair of first and second switches are provided.
The terminal portions 2b, 3b of the terminal plates 2, 3 are provided with locking portions 2d, 3d facing outwardly from each other. Other configurations are the same as those of the above-described embodiment.
Here, the same parts are given the same numbers. As for the mounting structure on the printed circuit board 11, the locking portions 2d and 3d are press-fitted into the holes 11a in the same manner as described above. Then, outward reaction forces act on each other.

[0019]

According to the switch of the present invention, a substantially rectangular parallelepiped housing 1 made of an insulating material is provided.
Operating portion 9 attached to the front portion 1a of the housing 1, and the lower portion 1 of the housing 1 embedded and attached to the housing 1.
e, and terminal plates 2 and 3 protruding out of the housing 1 from outside of the housing 1, and the side surface 1c of the housing 1 is provided with the flux guiding means 1g reaching the lower surface 1e. The rise to the portion 9 can be prevented, and therefore, there is no need to apply a flux rise preventing agent as in the related art, and a switch with good productivity and low cost can be provided. Also, flux inducing means 1
g is configured by a vertical step portion formed by recessing the rear surface portion 1b side of the side surface portion 1c from the front surface portion 1a side, so that the configuration is simple and the manufacturability is good,
It is possible to provide a switch that can reliably prevent the flux from entering the front portion 1a by the step portion. Further, since the flux guiding means 1g is formed so as to be flush with the surfaces of the terminal plates 2 and 3, the flux guiding means 1g can be formed at the joint 6 of the molding dies 4 and 5 when the housing 1 is molded. Therefore, the production of the flux guiding means 1g is extremely simple, and a switch with good productivity can be provided.

Further, a substantially rectangular parallelepiped housing 1 made of a molded product of an insulating material, an operation portion 9 attached to the front portion 1a of the housing 1, and a lower portion of the housing 1 embedded and attached to the housing 1 1e, a terminal plate 2, 3 protruding out of the housing 1, and a rear surface portion 1b of the housing 1 where the terminal plates 2, 3 are located.
e, a notch 1h is provided so as to expose a part of the rear surface of the terminal plates 2 and 3, so that the notch 1h can guide the flux toward the rear surface 1b of the housing 1. A reliable switch for operating the operation unit 9 can be provided. In addition, gas can be vented by the cutout portion 1h, and a reliable soldered switch can be provided. Further, the side surface portion 1c of the housing 1 is provided with a flux guiding means 1g reaching the lower surface portion 1e, and the flux guiding means 1g is arranged near the notch portion 1h, so that the notch portion 1h The raised flux is further subjected to a flux guiding means 1g to form a front portion 1a.
Side can be prevented, and a reliable switch for preventing the flux from entering the operation unit 9 can be provided. Further, since the flux guiding means 1g is configured by a vertical step portion formed by recessing the rear surface portion 1b side of the side surface portion 1c from the front surface portion 1a side, the configuration is simple and the manufacturability is good. At the same time, it is possible to provide a switch capable of reliably preventing the flux from entering the front portion 1a by the step portion.

The flux guiding means 1g is formed flush with the surfaces of the terminal plates 2 and 3, and the flux guiding means 1g is formed flush with the surfaces of the terminal plates 2 and 3. When the housing 1 is molded, the flux guiding means 1g can be formed at the joints 6 of the molding dies 4 and 5, so that the production of the flux guiding means 1g is extremely simple and a switch with good productivity can be provided. In addition, the housing 1 is placed on the printed circuit board 11, and the terminals 2 and 3 are inserted into the holes 11a of the printed circuit board 11. The front surface 1a side of the hole 11a is closed by the lower surface 1e. The terminal portions 2 and 3 are soldered to the conductive pattern in a state where the rear surface portion 1b side of the hole 11a is opened by the cutout portion 1h, so that the front portion 1a of the housing 1 is soldered when the switch is soldered. The notch 1h can prevent the flux from advancing to the side, and it is possible to provide a switch mounting structure in which the operation of the operation unit 9 is reliable. Further, the side surface portion 1c of the housing 1 is provided with a flux guiding means 1g reaching the lower surface portion 1e, and the flux guiding means 1g is arranged near the notch portion 1h, so that the notch portion 1h The raised flux can be further prevented from advancing to the front portion 1a by the flux guiding means 1g, and a switch mounting structure that reliably prevents the flux from advancing to the operation portion 9 can be provided.

[Brief description of the drawings]

FIG. 1 is a front view of a switch according to the present invention.

FIG. 2 is a perspective view of the switch of the present invention as viewed from the back.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 1;

FIG. 4 is a sectional view taken along line 4-4 in FIG. 1;

FIG. 5 is a front view showing a housing and a terminal plate according to the switch of the present invention.

FIG. 6 is an explanatory view showing a method for manufacturing a switch of the present invention.

FIG. 7 is a sectional view of a main part of a molding die showing a method for manufacturing a switch of the present invention.

FIG. 8 is a front view showing the mounting structure of the switch of the present invention.

FIG. 9 is a side view showing a switch mounting structure of the present invention.

FIG. 10 is a rear view showing the mounting structure of the switch of the present invention.

FIG. 11 is a sectional view of a main part showing a switch mounting structure of the present invention.

FIG. 12 is a front view showing another embodiment of the switch of the present invention.

FIG. 13 is a front view showing a conventional switch mounting structure.

FIG. 14 is a side view showing a conventional switch mounting structure.

FIG. 15 is a front view showing a housing and a terminal plate of a conventional switch.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 housing 1a front portion 1b rear surface portion 1c side surface portion 1d upper surface portion 1e lower surface portion 1f recessed portion 1g flux guiding means 1h cutout portion 1j convex portion 2 first terminal plate 2a contact portion 2b terminal portion 2c taper portion 2d locking portion DESCRIPTION OF SYMBOLS 3 2nd terminal board 3a Contact part 3b Terminal part 3c Taper part 3d Locking part 4 1st shaping | molding die 5 2nd shaping | molding die 5a Step 6 Joint 7 Hollow 8 Movable contact 9 Operating part 9a Flange Part 9b protrusion 10 support plate 10a hole 11 printed circuit board 11a hole

Claims (8)

[Claims] A housing having a substantially rectangular parallelepiped shape formed of a molded product of an insulating material; an operation portion mounted on a front portion of the housing;
A switch comprising: a terminal plate protruding from the lower surface of the housing to the outside of the housing; and a side surface of the housing provided with a flux guiding means extending to the lower surface. 2. The switch according to claim 1, wherein said flux guiding means comprises a vertical step formed by recessing a rear surface of said side surface from said front surface. . 3. The switch according to claim 1, wherein said flux guiding means is formed flush with a surface of said terminal plate. 4. A substantially rectangular parallelepiped housing made of a molded product of an insulating material, an operation unit attached to a front portion of the housing, and embedded and attached to the housing,
A terminal plate protruding from the lower surface of the housing to the outside of the housing, and a notch extending to the lower surface is provided at a rear surface of the housing where the terminal plate is located; A switch characterized by exposing. 5. The side surface of the housing is provided with a flux guiding means reaching the lower surface, and the flux guiding means is arranged near the notch. Switch. 6. The switch according to claim 5, wherein said flux guiding means is formed by a vertical step formed by recessing a rear surface of said side surface from said front surface. . 7. The switch according to claim 5, wherein said flux guiding means is formed flush with a surface of said terminal plate. 8. A switch comprising: the switch according to claim 4, 5 or 6 or 7; and a printed circuit board having a conductive pattern and having a hole, wherein the housing is mounted on the printed circuit board. The terminal portion was inserted into the hole of the printed circuit board, and the front side of the hole was closed by the lower surface, and the rear side of the hole was opened by the notch. The switch mounting structure wherein the terminal portion is soldered to the conductive pattern in a state.