JP2000222972A - Switch and fitting structure thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a switch, and lower a material cost by providing terminal parts of a pair of terminal boards with locking parts to be protruded in the board surface direction opposite to each other, and projecting the terminal parts of the pair of terminal boards outside of a housing from a lower surface of the housing. SOLUTION: A pair of first and second terminal boards 2, 3 formed of a metal plate fitted to a housing 1 have contact parts and terminal parts 2b, 3b and taper parts 2c, 3c, and the terminal boards 2, 3 are provided with lock parts 2d, 3d projected in the board surface direction opposite to each other. A printed circuit board 11 as a fitting member of switch has plural rectangular holes 11a formed at predetermined intervals. When the lock parts 2d, 3d provided in the first and the second terminal boards 2, 3 are pressed into holes 11a of the printed circuit board 11, the terminal parts 2b, 3b are enlarged in the board surface direction along the taper parts 2c, 3c, and the lock parts 2d, 3d are locked in the holes 11a.

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, since the terminal portions 52b and 53b of the first and second terminal plates 52 and 53 are projected from both side portions 51b of the housing 51, the size of the switch is large. Problem. Further, with such a configuration, the first and second terminal plates 52,
There is a problem that the material width B3 of the switch 53 becomes large and the cost of the switch increases. Also, the terminal plates 52 and 53 have
Since the latch portions 52c and 53c bent in a rectangular shape are provided, there is a problem that the locking strength when locked to the printed circuit board 56 is weak.

[0007]

As a first means for solving the above-mentioned problems, a pair of terminal plates made of a metal plate and having a contact portion and a terminal portion, and the pair of terminal plates are embedded. The terminal portion of the pair of terminal plates is provided with a locking portion projecting in a plate surface direction,
The terminal portions of the pair of terminal plates project from the lower surface of the housing to the outside of the housing, respectively, and the pair of terminal plates are disposed on the same surface with the locking portions facing each other. Configuration. Further, as a second solution, the pair of terminal portions are arranged such that the locking portions face each other. As a third solution, an operation unit for switching a contact is attached to a front portion of the housing which is at a right angle to the lower surface portion from which the terminal portion is projected,
The terminal portions of the pair of terminal plates are located within a width dimension of the lower surface portion of the housing.

[0008] Further, as a fourth solution means, claim 1,
Or the switch according to 2 or 3, and a printed circuit board having a conductive pattern and having a hole, the housing is placed on the printed circuit board, and the terminal portion is pressed into the hole of the printed circuit board. The locking portion provided on the terminal portion is locked to the printed circuit board in the hole. According to a fifth aspect of the present invention, the terminal portions of the pair of terminal plates are configured such that tips of the terminal portions are mutually expanded in a width direction of the lower surface portion of the housing, so that the terminal portions are formed in the holes of the printed board. The structure was press-fitted.

[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 for manufacturing the switch of the present invention, and Fig. 7 is a main part of a molding die showing the method for manufacturing the switch of the present invention. 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, but when press-fitted, the first and second terminal plates 2 and 3 are deformed inside each other. Then, outward reaction forces act on each other.

[0019]

According to the switch of the present invention, a pair of terminal plates 2,
3 are provided with locking portions 2d, 3d protruding in the plate surface direction, and the terminal portions 2b of the pair of terminal plates 2, 3 are provided.
3b is projected from the lower surface 1e of the housing 1 to the outside of the housing 1, respectively.
Since the locking portions 2d and 3d are arranged on the same surface in a state of facing each other, the size is smaller than that of the related art, and
A switch with a low material cost can be provided. Further, since the pair of terminal portions 2b, 3b are arranged with the locking portions 2d, 3d facing each other, the width B2 of the material of the first and second terminal portions 2, 3 is further increased. It is possible to provide an inexpensive switch that can be reduced in number. An operation unit 9 for switching contacts is attached to the front surface 1a of the housing 1 at a position perpendicular to the lower surface 1e from which the terminals 2b, 3b protrude. 2b, 3b
Is located within the width dimension B1 of the lower surface portion 1e of the housing 1, so that the mounting dimension width of the pair of terminal plates 2 and 3 can be reduced, and the size of the pair of terminal plates 2 and 3 can be reduced. The width can be reduced, and an inexpensive switch can be provided.

Further, the housing 1 is placed on the printed circuit board 11, and the terminals 2b and 3b are connected to the printed circuit board 1.
1 is pressed into the hole 11a, and the locking portions 2d, 3d provided on the terminal portions 2b, 3b are inserted into the printed circuit board 11 in the hole 11a.
, The strength of the pair of terminal boards 2 and 3 locking to the printed circuit board 11 can be increased, and a reliable temporary fixing of the switch to the printed circuit board 11 can be provided. Thus, it is possible to provide a switch mounting structure in which the switch does not rise from the printed circuit board 11 when the switch is soldered. In addition, the terminal portions 2b, 3b of the pair of terminal plates 2, 3 are formed such that the distal ends of the terminal portions 2b, 3b are expanded in the width direction of the lower surface portion 1e of the housing 1 so as to be inserted into the holes 11a of the printed circuit board 11. Due to the press-fitted configuration, the locking strength of the pair of terminal boards 2 and 3 to the printed circuit board 11 can be further increased, and a reliable temporary fixing of the switch to the printed circuit board 11 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 concave 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 (5)

[Claims] 1. A terminal comprising a pair of terminal plates made of a metal plate and having a contact portion and a terminal portion, and a housing in which the pair of terminal plates are embedded and mounted. A locking portion protruding in a plate surface direction is provided, the terminal portions of the pair of terminal plates are respectively protruded from the lower surface portion of the housing to the outside of the housing, and the pair of terminal plates are A switch, wherein the stop portions are disposed on the same surface with the stop portions facing each other. 2. The switch according to claim 1, wherein the pair of terminal portions are disposed with the locking portions facing each other. 3. An operation part for switching contacts is attached to a front part of the housing at a position perpendicular to the lower surface part from which the terminal part protrudes, and the terminal part of the pair of terminal plates is attached to the housing. 3. The housing according to claim 1, wherein the housing is positioned within a width dimension of the lower surface.
The described switch. 4. A switch comprising: the switch according to claim 1; and a printed circuit board having a conductive pattern and having a hole, wherein the housing is mounted on the printed circuit board and the terminal portion is provided. A press-fitting into the hole of the printed circuit board, and the locking portion provided on the terminal portion is locked to the printed circuit board in the hole. 5. The terminal portion of the pair of terminal plates, wherein the distal ends of the terminal portions are mutually expanded in the width direction of the lower surface portion of the housing, and are pressed into the holes of the printed circuit board. The switch mounting structure according to claim 4, characterized in that: