KR100230525B1 - Switch device - Google Patents

Abstract

The common contact terminals of the flat plate shape are structured such that the movable contacts are sandwiched in the form of a clip, which is a factor that hinders cost increase and miniaturization. In addition, since the flat portion of the external connection terminal has a short dimension, there is a problem that the contact area with the solder layer is insufficient and high reliability is difficult to obtain. In addition, since the corner portions and the bent portions are integrally formed on both sides of the metal cover, there is a problem that the yield of the material becomes poor at the time of processing. And a movable contact portion capable of being brought into contact with and detached from the fixed contact terminal at one end portion and having a curved plate spring sliding portion at the other end portion, A notch for exposing a side surface of a base end portion of the terminal for external connection is provided on a side wall of a synthetic resin box body forming an external angle, The front ends of the respective portions of the cover of the cover and the cover come in contact with or close to each other with the printed pattern and the ground pattern of the substrate.

Description

Switch device

FIG. 1 is a structural view showing a state in which an operating portion is not pushed in according to the first embodiment of the present invention. FIG.

FIG. 2 is a structural view showing a state when the operating portion is pushed in according to the first embodiment; FIG.

FIG. 3 is a main part perspective view of a second embodiment of the present invention; FIG.

FIG. 4 is an overall configuration diagram of a switch device having a wafer shown in FIG. 3; FIG.

FIG. 5 is a front view of a switch device according to a third embodiment of the present invention in contact with a ground pattern at the tip of each part of the cover. FIG.

FIG. 6 is a front view for explaining a relationship between the edge of each part of the cover of the switch device and the earth pattern according to the fourth embodiment of the present invention. FIG.

7 is a partially enlarged view of a terminal portion in a state where a switch device according to the third and fourth embodiments of the present invention is mounted on a printed circuit board.

FIG. 8 is a perspective view showing the appearance of the cover of the present invention; FIG.

Fig. 9 is a partially enlarged view for explaining a relationship in which a front end of each part of a cover of a switch device according to a fourth embodiment of the present invention is brought close to a printed board;

FIG. 10 is an exploded perspective view showing a first conventional example of the present invention; FIG.

FIG. 11 is a main part perspective view showing a second conventional example of the present invention; FIG.

FIG. 12 is a perspective view showing a schematic appearance of a switch device of a third conventional example of the present invention; FIG.

13 is a front view showing a state in which the switch device of the third conventional example of the present invention is soldered to a printed circuit board.

14 is a partially enlarged view showing a state in which a terminal portion of a switch device of a third conventional example of the present invention is soldered to a printed circuit board;

FIG. 15 is a perspective view showing the appearance of a cover of a third conventional example of the present invention; FIG.

FIG. 16 is a cross-sectional view of a main portion for explaining a schematic structure before operation of a switch device according to third and fourth embodiments of the present invention; FIG.

FIG. 17 is a cross-sectional view of a main portion for explaining a schematic structure after the operation of the switch device according to the third and fourth embodiments of the present invention. FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

1, 11: first fixed contact terminal 2, 12: second fixed contact terminal

3,13,103: Common contact terminal 4,14,104,112: External connection terminal

5,105: Wafer 6,16,36,106,126: Lever

6a, 106a: support shaft 7, 37, 107: movable contact

7a, 17a, 37a, 107a, 107b: contact portions 7c, 17b, 37b:

8, 18, 38, 108: Twisted coil spring 9, 19, 45, 109,

14a, 112a: flat portion 14b, 112b:

15, 35, 111, 125: Box body 15a:

15b: side wall 15c: notch

16a, 36a, 126a: operating part 16b, 36b:

17: movable contact point 23, 113:

24, 114, 131a to 131c, 132a: solder lands 25, 115: solder

31, 101: first fixed terminal 32, 102: second fixed terminal

33: Common terminal 34: External connection terminal

34a to 34c, 124a to 124c: conduction terminal 35a: front wall (front wall)

35b: rear wall (rear side wall) 35d, 125d: left and right side walls

35e: projection 35f: bearing part

35g: bottom plate 36c: spring mounting hole

38a: one end of the spring 38b: free end of the spring

41a to 41c: solder land portion 42: earth pattern

43, 133: solder layer 45a, 129a: leg (leg)

45b: tip 45d: spring positioning projection

45e, and 129e: upper surface portion 45f:

45g: engaging hole 46, 130: printed substrate

108a: winding portion 108b, 108c: free end portion

129c:

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a switch device, for example, provided in a main body of a telephone and adapted to a hook-up position or the like for detecting detachment of a handset.

10 is an exploded perspective view showing a first conventional example of this type of switch device.

The switch device shown in Fig. 10 is provided with a wafer 105 in which a first fixed contact terminal 101, a second fixed contact terminal 102, a common contact terminal 103 and an external connection terminal 104 are integrally formed, An insulating lever 106 rotatably assembled to the wafer 105, a movable contact 107 mounted on the lever 106 with clip-shaped contact portions 107a and 107b at both ends thereof, A twisted coil spring 108 that constantly urges the lever 106 in the predetermined rotational direction and a wafer 105 on which the lever 106 and the twisted coil spring 108 are assembled are closed to be integrated with each other And the cover 109 is schematically constituted.

That is, in such a conventional switch device, the first fixed contact terminal 101 and the common contact terminal 103 are provided on the inner bottom surface of the wafer 105, and the upper side of the first fixed contact terminal 101 And the first fixed contact terminal 101 and the second fixed contact terminal 102 are connected to the contact portion 107a of the movable contact 107 provided on the lever 106 And the common contact terminal 103 is inserted in the form of a clip by the contact portion 107b. When the lever 106 is rotated with the support shaft 106a supported by the bearing portion 105a of the wafer 105 as a rotation shaft, the contact portion 107b of the movable contact 107 is brought into contact with the common contact terminal 103, But the contact portion 107a is in contact with and separated from the first and second stationary contact terminals 101 and 102. This makes it possible to switch circuits on and off. The winding portion 108a of the twisted coil spring 108 is accommodated in the spring accommodating portion 106b of the lever 106 so that one free end portion 108b contacts the spring receiving surface of the lever 106 Since the other free end portion 108c is pushed downward by the cover 109 when the cover 109 is provided, the lever 106 is rotated in the predetermined rotation direction The direction in which the contact portion 107a contacts the first fixed contact terminal 101).

Therefore, when the downward load on the operating portion 106c of the lever 106 is removed, for example, when the receiver 106 is detached from the main body of the telephone, the biasing force of the twisted coil spring 108 The contact portion 107a of the movable contact 107 is held in contact with the first fixed contact terminal 101 and the first fixed contact terminal 101 and the common contact terminal 101 are held in contact with each other via the movable contact 107, (103) are formed in a circuit. When the load is applied downward to the operating portion 106c of the lever 106 as in the case where the receiver is returned to the main body of the telephone, the lever 106 is moved to the biasing force of the twisted coil spring 108 The second fixed contact terminal 102 is moved to the second fixed contact terminal 102 via the movable contact 107 because the contact portion 107a comes away from the first fixed contact terminal 101 and comes into contact with the second fixed contact terminal 102, And the common contact terminal 103 are connected to each other. Since the on / off circuit switching is performed in accordance with the presence or absence of a load on the operating portion 106c, for example, detachment of the handset to the telephone body can be detected.

FIG. 11 is a cross-sectional view showing a second conventional example of a switch device to which this type of terminal is attached.

11 is a box body such as a wafer and 112 is a terminal for external connection. The terminal 112 is connected to a metal plate led from the inside of the box body 111 to the bottom edge portion 111a thereof And is formed into a hook shape having a flat portion 112a on the base end side and an upstanding portion 112b rising along the side wall 111b of the box body 111. [ When this electric component is mounted on the printed board 113, cream solder is first applied on the solder land 114 of the printed board 113 and the flat portion 112a of the terminal 112 And then irradiated with infrared light through the inside of a reflow furnace to melt the cream solder and adhere to the terminal 112. [ As a result, as shown in FIG. 11, the terminal 112 and the solder land 114 are electrically or mechanically connected by the solder layer 115 formed by solidifying the cream solder after melting.

As described above, since the external connection terminal 112 is formed in an upward pawl shape, the electric component in which the amount of protrusion of the terminal 112 from the box body 111 is reduced can be reduced to the entire size including the terminal 112 It is advantageous in that the mounting density is improved.

The third conventional example of the installation structure of the switch device to which this type of terminal is attached will be described with reference to Figs. 12 to 15. Fig.

The switch device shown in these drawings has a box body 125 made of a synthetic resin which is hollow and has an opened top surface and is formed in a box shape. Inside the box body, a switch unit (not shown) for switching an electric circuit And the conduction terminals 124a, 124b, and 124c from the switch portion are protruded outward from the lower portion of the box body. The lever 126 is rotatably supported by the left and right side walls 125d of the box body 125 and is automatically returned by a spring (not shown).

15, a metal plate made of iron plate is formed by pressing, folding or the like as shown in FIG. 15, and the surface of the cover 129 is subjected to tin plating treatment to improve the solderability, An engagement hole 129g provided on the connection plate 129f for covering the open top surface of the cover 129 and mounting the cover 129 on the box body 125 and an engagement hole 129g provided on the upper surface portion 129e opposite to each other And a bent portion 129c for connecting the printed circuit board 130 formed by bending the ends of the corner portions 129a at right angles and outwardly. When the cover 129 is provided on the box body 125, the folded surface of the bent portion 129c is set to be flush with the conductive terminals 124a, 124b, and 124c.

The printed circuit board 130 is provided with solder lands 131a to 131c at portions opposed to the conduction terminals 124a to 124c and electrically connects the conduction terminals 124a to 124c to the printed board 130. [ As shown in Fig. The width of the solder lands 131a to 131c is wider than the width of the conduction terminals 124a to 124c of the switch device and the width of the solder lands 131a to 131c is set to a degree that the molten solder does not flow onto the printed board 130 Width.

The print engine 130 is provided with a soldering land 132a at a portion opposed to the bending portion 129c of the cover 129 and soldering the bending portion 129c to the print engine 130 Respectively. The width of the solder land 132a is wider than the width of each bent portion 129c of the cover 129, and the width of the solder land 132a is set to such a width that molten solder does not flow out.

To mount such a conventional switch device on the printed board 130, cream solder is applied to the solder lands 131a to 13c and 132a of the printed board 130 as shown in FIG. 14, The external conduction terminals 124a to 124c of the switch device and the bent portion 129c of the cover 129 are placed. Thereafter, the printed circuit board 130 on which the switch device is mounted is irradiated with infrared rays through a reflow furnace (not shown) with a conveyer to melt the cream solder, and the cream solder after melting The printed circuit board 130 of the switch device is electrically and mechanically installed by the solder layer 133 formed by solidification.

In the switch device, for example, the lever 126 is rotated by the attachment / detachment of the handset from a telephone body (not shown), and the electric circuit inside the box body 125 is switched. For example, a telephone set (not shown) or the like in which the above-described switch device is used is connected to an operating portion 126a of the lever 126 of the switch device in conjunction with an operation of receiving and placing the telephone set, The switch of the switch device is switched so that the hand of the person comes close to the switch device and the switch device is turned on by the electrostatic induction action of the static electricity charged on the body of the person, Is in an environment where it is easy to fight. If the amount of static electricity becomes equal to or greater than a predetermined amount, if there is a conductor such as a metal near the charged insulator, without electrically connecting the conductor such as the metal and the charged insulator, A discharge phenomenon occurs between the conductor and the metal conductor closest to the insulator and discharges the electrostatic charge of the charged insulator to the metal conductor.

For this reason, static electricity is charged in a box body 125 made of an insulator, that is, a synthetic resin, and a static electricity charged in the box body 125 is applied to the box body 125 of the switch device and the circuit pattern There is a problem that an abnormality occurs in the circuit in the switch device or an abnormality occurs in other electronic parts assembled in the periphery of the switch device to adversely affect the telephone main body. In order to avoid such a problem, the conventional switch device has a box-shaped body 125 made of a synthetic resin having a hollow inside and an open top, and is covered with a metallic cover 129, The folded portion 129c formed by folding down and bent downward along the outer surface of the left and right sidewalls 125d of the box body 125 at right angles and folding outwardly in the outward direction is inserted into the ground pattern The static electricity charged in the box body 125 of the switch device is reliably discharged to the ground pattern 132 of the printed circuit board 130. In other words,

However, in order to improve the solderability, it is necessary to perform the surface treatment such as tin plating on the entire surface of the metal cover 129 processed by the iron plate or the like.

The cover 129 includes a top surface portion 129e for shielding the top surface of the box body 125 and a discharge portion 129e for discharging the static electricity charged on the box body 125 to the ground pattern 132 of the printed circuit board 130 A bent portion 129c formed by bending a tip end of a corner portion 129a which is bent and extended downward from both side surfaces of the upper surface portion 129e of the cover and which is bent and bent at a right angle at right angles, The metal material such as iron used for the cover 129 has a poor material yield when it is processed by a press or the like, and many materials must be used.

In the first conventional switching device described above, the clip-shaped contact portions 107a and 107b provided at both ends of the movable contact 107 are connected to the first or second fixed contact terminals 101 and 102 The pressing operation for obtaining the movable contact 107 from the metal plate is troublesome and the operation of the movable contact 107 is difficult when the lever 106 is assembled to the wafer 105. [ It is necessary to enlarge both end portions so that the assembling work can not be performed smoothly and all the contact terminals 101 to 103 must be projected in the inner space of the wafer 105 in the form of a flat plate, And the like. Such a problem has caused the manufacturing cost to increase.

In the case of this first conventional switch, a strong biasing force capable of quickly rotating the lever 106 in the return direction is applied to the twisted coil spring 108, which is somewhat larger than that required for the twisted coil spring 108. [ It is necessary to assure a certain amount of space for arranging the twisted coil spring 108 in the lever 106. This has been a factor for hindering miniaturization.

The external connection terminal 112 of the second conventional example of the switch device of this kind is placed on the cream solder before melting and the flat portion 112a is sent to the reflow furnace so that the solder is melted in the furnace 11, some of the molten solder is attached even on one side of the standing portion 112b, but the flat portion 112a of the terminal 112 has a short dimension so that the contact area with the cream solder is small, In order to make the solder strength of the terminal 112 to the printed board 113 sufficient, that is, the solder layer 115 (or the solder layer) It is preferable to attach the molten solder to the side surface 112c and the upper surface of the flat portion 112a in order to prevent the reliability and the mechanical strength of the conduction by the solder.

However, in the case of the second conventional product, the sidewall 111b of the box body 111 made of synthetic resin has a property of removing the molten solder, and as shown in Fig. 11, the protrusion from the sidewall 111b It is almost impossible to attach the molten solder to the side surface 112c of the flat portion 112a of the terminal 112 having a small amount of the solder. Therefore, it is also difficult to allow the molten solder to pass through the upper surface of the flat portion 112a, There is a problem that the contact area between the terminal 112 and the solder layer 115 is insufficient and it is difficult to obtain high reliability.

Furthermore, in the third conventional example, the tin plating or the like is applied to the entire surface of the cover 129 to improve the solderability of the bent portion 129c of the corner portion 129a of the cover, There was a problem causing rise.

In the third conventional example, in order to solder the switch device to the ground pattern 132 of the printed circuit board 130, the upper surface portion 129e of the cover 129 is opposed to both ends of the upper surface portion 129e, And a connecting bending portion 129c formed by bending the tip end of the angular portion 129a bent downwardly and extending downward along the outer surface of the left and right side walls of the base portion 125 at right angles. When the cover 129 is formed by a press or the like, the cover 129 is formed of a single sheet of iron plate, and a corner portion 129a and a bent portion 129c are formed at both ends of the upper surface portion 129e of the cover 129 There is another problem that the material yield of the cover 129 is deteriorated and the cost is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the prior art, and it is an object of the present invention to provide a semiconductor device which can facilitate cost reduction by simplifying a molding die and improving assembling property, To improve the soldering strength of the printed circuit board to the printed circuit board, to improve the material yield of the cover, and to promote the cost down.

The above object of the present invention can be achieved by a semiconductor integrated circuit device comprising a wafer in which a common contact terminal, a fixed contact terminal and an external connection terminal are integrally molded, an insulative lever rotatable with respect to the wafer, A movable contact which always comes into elastic contact with the terminal and which can contact and separate from the fixed contact terminal according to the rotation of the lever and a twisted coil spring which always applies the lever in a predetermined rotational direction, Which is elastically contacted with the common contact terminal, is formed into a plate spring-like sliding portion that curves the bottom surface of the free end side by sliding on the common contact terminal. At this time, it is preferable that the common contact terminal is formed to have a shape (for example, a hemispherical shape) that expands and projects from the inner bottom surface of the wafer, and the rotation direction of the lever, which uses the elastic repulsive force of the sliding portion, It is more preferable that the biasing force of the twisted coil spring is set to be in the same direction as the rotational direction of the lever which makes the rotational force.

Further, a synthetic resin-made box body which forms an outer shell in a main body portion of the wafer formed by integrally molding the terminal groups, and a synthetic resin-made box body extending from the box body to the bottom edge portion of the box body, And the terminal is soldered to the solder land of the printed circuit board, characterized in that a side wall of the base end portion of the terminal located at the bottom edge portion of the box body is exposed to the side wall of the box body Thereby forming a notch.

As a means for solving the above problems, there is provided a switch device comprising a box body made of the synthetic resin, a conduction terminal for external connection provided in the box body, and a metal cover provided on each of the box bodies, The conductive terminal is soldered to the circuit pattern of the printed circuit board so that the front end of the cover is brought into contact with the ground pattern of the printed circuit board.

In addition, the present invention is a switch device comprising a box body made of the synthetic resin, a conduction terminal for external conduction provided in the box body, and a metal cover provided on the box body, wherein the conduction terminal is a circuit pattern And the tip of each part of the cover is brought close to the ground pattern of the printed board.

It is preferable that x <y be the distance (x) from the tip of each corner portion to the ground pattern of the printed circuit board and the distance (y) from the tip of the corner of the cover to the circuit pattern of the printed circuit board Respectively.

In addition, the mounting structure of the electronic component of the present invention is configured such that the tip of each corner portion is pointed.

It is possible to change the conventional contact structure in which the movable contact is inserted in a clip shape by inserting the common contact terminal of the flat plate shape into the clip shape and the bottom surface of the sliding portion of the movable contact is slid to the common contact terminal as described above, For example, a hemispherical common contact terminal can be provided so as to protrude from the inner bottom surface of the wafer, so that the molding die of the wafer can be simplified, and when the lever is assembled to the wafer It is not necessary to enlarge both end portions of the movable contact so that assembling property is improved. Further, since the elastic repulsive force of the sliding portion elastically contacting the common contact terminal is applied to the lever, by using the elastic repulsive force as the rotational return force of the lever, even if a small twisted coil spring having a relatively weak biasing force is used, .

If the side surface of the proximal end portion of the terminal for external connection is exposed in the notch provided on the side wall of the box body, the terminal is placed on the solder land from the outside of the side wall of the box body without increasing the projecting amount of the terminal from the box body The molten solder tends to adhere to the side surface of the terminal at a certain distance from the side wall and the molten solder tends to migrate even to the upper surface of the terminal, Can be greatly increased.

Further, since the tip of the cover can be surely escaped from the ground pattern of the printed circuit board by contacting or bringing the front end of the cover into contact with or close to the ground pattern of the printed circuit board, the ground pattern of the printed circuit board and the printed circuit board need not be soldered. Tin plating or the like becomes unnecessary. In addition, since expensive materials having good solderability are not required, the cost of the cover can be reduced. Further, since soldering is not performed, the amount of solder used can be reduced, and management for soldering becomes unnecessary.

[Example]

A first embodiment of the switch device according to the present invention will be described below with reference to Figs. 1 and 2. Fig. FIG. 1 is a structural view showing a state when the operating portion is not pressed in the first embodiment, and FIG. 2 is a structural view showing a state when the operating portion is pressed in the second and third embodiments.

The switch device shown in Figs. 1 and 2 includes a wafer 5 formed by integrally molding the terminal groups 1 to 4 and a support shaft 6a supported by the bearing portion 5a of the wafer 5 An insulating lever 6 rotatably assembled to the wafer 5 as a rotating shaft and a sliding portion 7c having a clip-shaped contact portion 7a at one end and a curved leaf spring shape at the other end And the movable contact 7 attached to the lever 6 and the free end 8b of the lever 6 housed in the winding portion 8a are engaged with the lever 6 in a predetermined rotation direction And the wafer 5 having the lever 6 and the twisted coil spring 8 assembled therein is closed so as to cover the other free end of the twisted coil spring 8, And a cover 9 that presses down the movable contact 8c of the terminal group 1 to 4, The first fixed contact terminal 1 and the second fixed contact terminal 2 that are in contact with and detached from the movable contact 7 are protruded in the inner space of the wafer 5 in a flat plate shape, The common contact terminal 3 to which the contact terminal 7c always slides projects in a hemispherical shape from the inner bottom surface of the wafer 5 and the external connection terminal 4 derived from each contact terminal 1 to 3 is connected to the wafer 5).

That is, in the first embodiment, the portion of the movable contact 7, which is always in elastic contact with the common contact terminal 3, is formed not in the same clip shape as the conventional product but on the free end side, The shape of the common contact terminal 3 is not a flat plate shape as in the prior art but is slightly protruded from the inner bottom surface of the wafer 5 And is formed in a hemispherical shape. However, the curved shape of the free end side of the sliding portion 7c is set to an arc shape with the center of rotation O of the lever 6 as the center of the circle. The base end side of the sliding portion 7c gives a reaction force (elastic repulsive force) generated by elastic contact to the common contact terminal 3 to the lever 6, (The direction in which the contact portion 7a is brought into contact with the first fixed contact terminal 1).

When the lever 6 is rotated with the support shaft 6a as a rotation axis, the sliding portion 7c of the movable contact 7 slides on the hemispherical common contact terminal 3 to be in a contact state But the contact portion 7a is brought into contact with and separated from the first and second stationary contact terminals 1 and 2, thereby making it possible to switch circuits on and off. Specifically, for example, when the downward load on the operating portion 6c of the lever 6 is removed, as in the case where the receiver is detached from the main body of the telephone, the lever 6 is tilted by the twisted coil spring 8 The contact portion 7a is brought into contact with the first stationary contact terminal 1 and is brought into contact with the first stationary contact terminal 1 via the movable contact 7, (1) and a common contact terminal 3 are made conductive (a state shown in FIG. 1). When the load is applied downward to the operating portion 6c of the lever 6 as in the case of returning the handset to the telephone main body after this, the lever 6 is biased by the biasing force of the twisted coil spring 8 The movable contact 7 is rotated in the reverse direction against the resilient repulsive force of the sliding portion 7c and the contact portion 7a comes off the first fixed contact terminal 1 and comes into contact with the second fixed contact terminal 2. Therefore, The second fixed contact terminal 2 and the common contact terminal 3 are connected to each other to form a circuit (state of FIG. 2). Therefore, it is possible to detect detachment of the handset from the main body of the handset, for example, by switching the circuit.

The sliding portion 7c of the movable contact 7 is moved in accordance with the rotation of the lever 6 to the common contact point 7b of the common contact point 7 in place of the conventional contact structure in which the movable contact point and the common contact terminal are clipped in a clip- It is possible to simplify the molding die of the wafer 5 and to reduce the size of the lever 5 by providing a common contact terminal 3 projecting in a hemispherical shape on the inner bottom surface of the wafer 5, (The end portion on the side of the contact portion 7a) of the movable contact 7 when the movable contact 6 is assembled to the wafer 5, the assembling property is also improved. Since the resilient repulsive force of the sliding portion 7c of the movable contact 7 elastically contacting the common contact terminal 3 can be used as the rotational return force of the lever 6, the biasing force as the twisted coil spring 8 It is possible to apply a sufficiently large rotational return force to the lever 6 even by using this relatively weak small one so as to reduce the internal space of the spring holding portion of the lever 6 and the wafer 5, It is advantageous.

In the first embodiment, the curved shape of the free end side of the sliding portion 7c of the movable contact 7 sliding on the common contact terminal 3 is formed so that the pivot center O of the lever 6 is a circle The curved shape of the sliding portion 7c is hardly changed even when the lever 6 is rotated. Therefore, excessive stress concentration in the bent portion of the sliding portion 7c Metal fatigue hardly occurs and there is no problem from the viewpoint of the life of the product.

In this embodiment, the common contact terminal 3 protrudes in a hemispherical shape on the inner bottom surface of the wafer 5, but if the common contact terminal is formed in a shape that is expanded and protruded from the inner bottom surface of the wafer 5, The sliding portion 7c of the movable contact 7 can be brought into sliding contact without complicating the mold.

FIG. 3 is a main part perspective view of a second embodiment of the present invention, and FIG. 4 is an overall configuration diagram of a switch device having a wafer shown in FIG.

This switch device is constituted by a metal plate led from the first and second stationary contact terminals 11 and 12 and the common contact terminal 13 to the bottom edge portion 15a of the box body 15 as shown in FIG. Is an electric component that is surface mounted by soldering a plurality of external connection terminals 14 formed by bending to the solder lands 24 of the printed circuit board 23 as shown in FIG. 14 are formed in the form of hooks having a flat portion 14a on the base end side and an upstanding portion 14b rising along the side wall 15b of the box body 15. That is, when this switch device is mounted on the printed circuit board 23, cream solder is first applied on the solder land 24 of the printed circuit board 23 and the flatness of the external connection terminal 14 The external connection terminal 14 and the solder land 14a are bonded to each other by the solder layer 25 formed by melting the cream solder after passing through the inside of the reflow furnace, (24) are electrically and mechanically connected. 3, in order to improve the reliability in soldering the external connection terminal 14, the terminal 14 and the terminal 14 are formed on the side wall 15b of the box body 15, Notches 15c are provided on both sides of the opposing portions and the side surfaces 14c of the base end portions of the terminals 14 located on the bottom edge portion 15a are exposed in the notches 15c. That is, by providing such a notch 15c, it is possible to prevent the solder land 24 (24) from being outside the side wall 15b of the box body 15 without increasing the amount of protrusion of the external connection terminal 14 from the box body 15 The lateral side 14c of the flat portion 14a of the terminal 14 which can be placed on the side wall 15b of the notch 15c can be made long and therefore the side wall 15b in the notch 15c can move away the molten solder The molten solder tends to adhere to the side surface 14c of the flat portion 14a at a position somewhat distant from the side wall 15b so that the molten solder tends to easily enter the upper surface of the flat portion 14a The solder contact area can be greatly increased. This switch device is configured so that the terminal 14 is connected to the printed circuit board 23 via the solder land 14 while suppressing the amount of protrusion of the external connection terminal 14 from the box body 15, So that reliability and mechanical strength after mounting can be significantly improved as compared with the conventional product.

It goes without saying that the present invention is also applicable to electric parts other than the switch device.

Third and fourth embodiments of the present invention will be described.

First, the third and fourth embodiments of the present invention will be described with reference to FIGS. 5 to 9, 16 and 17.

The switch device shown in these figures is provided with a box body 35 made of a synthetic resin having an inside hollow and an open top and a box shape. The box body 35 is provided with a projection 35e for snap-fixing the cover 45 described later. The left and right side walls 35d of the box body 35 are provided with bearing portions 35f for pivoting the pivot shaft 36b of a lever 36 to be described later.

The box body 35 is integrally provided with a first fixed terminal 31 of a substantially rectangular plate shape embedded in the bottom plate 35g of the box body 35 formed by molding the synthetic resin therein And the conduction terminal 34a is formed outside the left and right sidewalls 35d of the box body 35. The conduction terminal 34a is formed integrally with the fixed terminal 31 for external connection, And on the same plane as the bottom surface of the rear part of the bottom plate 35g, a short side (short side) of the box body 35 ) From the box body 35 in the direction of the arrow.

The second fixed terminal 32 has a thin plate shape and is disposed on the outer side of the fixed terminal 31 with a constant gap provided on the outer periphery of the first fixed terminal 31. In this state, the fixed terminal 32 is embedded in the bottom plate 35g and the rear wall 35b of the box body 35 so as to be integrally formed. In the fixed terminal 32, And the conduction terminal 34b is led out of the left and right side walls 35d of the box body 35 and connected to the bottom surface of the bottom plate 35g in the same plane And is disposed so as to protrude from the box body 35 like the conduction terminal 34a.

The common contact terminal 33 is formed in a hemispherical shape on the bottom plate 35g in the box body 35. The common contact terminal 33 is formed on the bottom plate 35g of the box body 35, And a conductive terminal 34c for external connection is formed integrally with the common contact terminal 33. The conductive terminal 34c is connected to the front end of the box 34c, And protrudes from the box body 35 like the conduction terminals 34a and 34b on the same surface as the bottom surface of the front section of the bottom plate 35g Respectively.

Although not shown, the first fixed terminal 31, the second fixed terminal 32, and the common contact terminal 33 each have a pair and are provided in parallel inside the box body 35.

As shown in Fig. 8, the cover 45 is made of a metal plate made of iron plate by pressing, bending, or the like. The cover 45 includes a top surface portion 45e for covering an open upper surface of the box body 35 and a spring positioning protrusion 45d for positioning a twist coil spring 38 to be described later inside the top surface portion. An engaging plate 45f folded downward from the front and rear portions of the upper surface portion 45e of the cover 45 so as to be folded downwardly and a cover 45 fixed to the box body 35 by snap- An engaging hole 45g and an angular portion 45a which is bent and extended downward on one side of either one of the short side direction of the upper surface portion 45e and a tip end 45b of the corner portion 45a. The length of each corner portion 45a to each corner tip 45b is set to be flush with the conduction terminals 34a to 34c when the box body 35 is provided. A spring positioning projection 45d for positioning a twisted coil spring 38, which will be described later, is provided in the upper surface portion 45e of the cover 45. [

The lever 36 is made of synthetic resin and has an operating portion 36a on the front side in the longitudinal direction and a pivot 36b at a substantially central portion and a spring mounting hole 36c near the rear of the pivot 36b, On the rear side of the lever 36, a movable contact 37 is supported.

The movable contact 37 provided on the lever 36 has a clip shape in which the contact portion 37a is electrically connected to the fixed terminal 31 or 32 by interposing the thin plate- Respectively. The sliding portion 37b is curved in an arc shape with the pivot 36b of the lever 36 as a turning center so as to always contact the common contact terminal 33. [

The tip end of the one end 38a of the twisted coil spring 38 is bent at a right angle. The twist angle between the one end portion 38a and the free end portion 38b is such that the operating portion 36a of the lever 36 is always vibrated clockwise.

The printed circuit board 46 is provided with solder lands 41a to 41c at portions thereof facing the conduction terminals 34a to 34c of the switch device and the conduction terminals 34a to 34b are connected to the printed board 46 So that it can be soldered. The width of the solder lands 41a to 41c is larger than the width of the conduction terminals 34a to 34c and the width thereof is such that the molten solder does not flow onto the printed board 46. [

The printed circuit board 46 is provided with an earth pattern 42 at a portion opposed to a front end 45b of each corner portion 45a of the cover 45, So as to be in contact with each other.

The movable contact 37 is provided on the lever 36 by caulking or the like and then the one end 38a of the twisted coil spring 38 is connected to the lever 36. [ And the free end portion 38b is provided with the twisted coil spring 38 on the lever 36 in a free state. The lever 36 provided with the movable contact 37 and the twisted coil spring 38 is inserted into the inside of the box body 35 from the open upper surface of the box body 35. [ At this time, the rotation shaft 36b of the lever 36 is mounted on the bearing portion 35f of the box body 35. [ The movable contact 37 is inserted with a clip-shaped contact portion 37a inserted in a thin plate-shaped second fixed terminal 32 provided inside the box body 35. [

The cover 45 is pressed against the free end 38b of the twisted coil spring 38 by the spring positioning projection 45d provided in the upper surface portion 45e of the metal cover 45, The inner surface of the upper surface portion 45e of the cover 45 abuts on the upper surfaces of the front and rear side walls 35a and 35b of the box body 35 and stops. In this state, the engaging hole 45g provided on the engaging plate 45f of the cover 45 is snap-fitted to the projection 35e provided on the front and rear side walls 35a, 35b of the box body 35 , The cover (45) is stopped by the box body (35).

When the lever 36 is assembled in the box body 35 and the rotation shaft 36b is attached to the bearing portion 35f of the box body 35 in this order, the lever 36 is rotated by the twist coil spring 38 The contact portion 37a slides from the second fixed terminal 32 to the first fixed terminal 31 so that the contact portion 37a and the first fixed terminal 31 are electrically connected .

At this time, the length from the corner portion 45a of the cover 45 to the tip end 45b of the corner portion is set to be flush with the conductive terminals 34a to 34c.

The switch device assembled in this way is configured such that the lever 36 is rotated in the clockwise direction with the pivot shaft 36b supported by the bearing portion 35f of the box body 35 as a supporting point, The contact portion 37a of the movable contact 37 is brought into contact with or disengaged from the first or second fixed contact 31 or 32 and the center of rotation of the lever 36 is rotated in the counterclockwise direction, The sliding portion 37b curved in an arc shape centering on the center is slid in contact with the common contact terminal 33 at all times.

More specifically, the switching device is configured such that the downward load on the operating portion 36a of the lever 36, for example, as in the case where the handset is detached from the telephone main body, The lever 36 is rotated upward by the biasing force of the twisted coil spring 38 so that the contact portion 37a of the movable contact 37 is in the first fixed state A circuit is formed in which the first fixed terminal 31 and the common contact terminal 33 are connected to each other through the movable contact 37. [

When a load is applied downward to the operating portion 36a of the lever 36 as in the case of returning the handset to the telephone body thereafter, the rotating shaft 36d is held against the biasing force of the twisted coil spring 38, The lever 36 rotates in the counterclockwise direction and the contact portion 37a of the movable contact 37 comes off the first fixed terminal 31 and contacts the second fixed terminal 32. Thus, The second fixed terminal 32 and the common contact terminal 33 are connected to each other through the first and second fixed terminals 32 and 37. Therefore, for example, detachment of the handset to the main body of the telephone is detected by this circuit switching.

As described in the third conventional example, the switch device is in an environment in which static electricity is easily charged due to the electrostatic induction action of static electricity charged on the body of a person because the hand of the person approaches to the side of the switch device.

In order to reliably discharge the static electricity charged to the switch device to the ground pattern 42 of the printed circuit board 46, the upper surface of the synthetic resin box body 35 of the switch device is covered with a metal cover 45, and the static electricity charged in the box body 35 is introduced into the metal-made cover 45 to form a tip end 45b of the leg portion 45a provided on one side of the cover 45 as shown in FIG. 5 Is brought into contact with the ground pattern 42 disposed on the printed circuit board 46 so that the static electricity charged in the switch device can be discharged appropriately.

In order to install the switch device of the present invention having such a configuration on a printed circuit board inside a telephone (not shown), as shown in FIG. 5, Cream solder is applied to the solder lands 31a to 31c of the circuit pattern 31 of the printed circuit board 46 for soldering the terminals 34a to 34c and the external conduction terminals 34a to 34c are formed on the cream solder, . The tip end 45b of the corner portion 45a provided on one side of the cover 45 is provided in contact with the ground pattern 42 of the printed board 46 to be in contact therewith. Thereafter, the printed circuit board 46 on which the switch device is mounted is passed through a reflow furnace (not shown) through a conveyor to irradiate infrared rays, thereby melting the cream solder, The switch device and the printed circuit board 46 are electrically and mechanically and reliably installed by the solder layer 43 formed by solidification.

In the third embodiment of the present invention constructed as described above, only by bringing the tip end 45b of the metal cover 45 provided in the switch device into contact with the ground pattern 42 of the printed board 40, The static electricity charged in the box body 35 of the switch device can be reliably discharged from the cover 45 to the earth pattern 42 of the printed board 46 without soldering as in the conventional example.

Therefore, the cover 45 of the present invention does not need to be soldered to the printed circuit board 46, so it is not necessary to perform a process such as tin plating on the surface of a metallic material such as a pearl plate, and an expensive material having good solderability is also required It is possible to reliably discharge the static electricity charged to the switch device by a metal material such as an iron plate which is low in cost that ignores solderability.

According to the cover 45 of the present invention, since the corner portions 45a do not have to be soldered to the earth pattern 42 of the printed board 46 as described above, the corner portions 39a described in the third embodiment The material yield of the cover 45 is improved because the bent portion 39c for soldering becomes unnecessary.

In a fourth embodiment of the present invention, when an insulator is used in a switch device, and static electricity is charged in the insulator, when the conductor is in the immediate vicinity of the insulator, The fourth embodiment of the present invention is not limited to this. That is, in the fourth embodiment of the present invention, when the static electricity of the charged object is equal to or greater than a predetermined amount, 6 shows a state in which the tip end 45b of the cover 45 and the ground pattern 42 of the printed board 46 are close to each other. 9 is a partially enlarged view for explaining the state of the cover 45. The dimension from the corner portion 45a to the tip end 45b of the cover 45 is made shorter than that of the third embodiment, The ground pattern 42 and the tip end 45b are provided on the printed board 46 so that the ground pattern 42 and the tip end 45b are not in contact with each other with the distance of the distance x from the ground pattern 42 to the tip 45b, .

The switch device provided on the printed board 46 with such a configuration is arranged so that the distance x from the tip end 45b to the earth pattern 42 disposed on the printed board 46 is set to be smaller than the distance x (Ya, yb) of the solder lands 41a and 41b of the circuit pattern 41 of the printed circuit board 46 to the end face of the solder lands 41a and 41b, the static electricity charged in the switch mount 46 is applied to the printed board 46 It is possible to discharge reliably from the tip end 45b of the cover 45 to the earth pattern 42 without discharging the circuit pattern 41. [

Since the dimensions of ya and yb can be approximated to a size slightly larger than x, the pitch between the terminals and the circuit pattern of the printed circuit board can be narrowed by reducing the dimension of x, have.

Conversely, the distance x from the tip end 45b of each corner portion 45a of the cover 45 to the ground pattern 42 of the printed circuit board 46 is reduced to a dimension slightly smaller than the distance between ya and yb Therefore, when the distance between ya and yb is large, the angle portion 45 (a) of the cover 45 can be shortened, so that the material yield of the cover 45 can be further improved.

As described above, in the structure of the present invention, since the tip end 45b of the corner portion 45a of the cover 45 is not soldered, the corner portion 45a of the cover 45 can be made shorter than the conventional one. 8, even if only one corner portion 45a of the cover 45 is provided, the static electricity charged in the switch device can reliably be discharged, so that the metal material used for the cover 45 is smaller than the conventional one , The material yield of the cover 45 can be greatly improved.

By making the shape of the portion of the tip end 45b of the cover 45 facing the earth pattern 42 sharp as shown in Figs. 8 and 9, The static electricity charged in the body 35 can be discharged to the earth pattern of the printed board at all times.

As described above, in the switch device according to the present invention, the movable contact is provided with the curved slider-shaped sliding portion and the bottom surface of the sliding portion is slid with respect to the common contact terminal in accordance with the rotation of the lever. It is possible to simplify the molding die of the wafer because the common contact terminal of the expanding and projecting shape can be provided by protruding not the flat plate shape on the bottom face but also the need to enlarge both ends of the movable contact when assembling the lever to the wafer It is possible to use the small twisted coil spring in which the biasing force is relatively weak, by allowing the elastic repulsive force of the sliding portion which comes into elastic contact with the common contact terminal as the returning force of the lever, There is an effect that a large rotational return force can be obtained, and as a result, Can promote the cost reduction and miniaturization of the switching device is applied to a location.

Further, in the switch device with the terminal according to the present invention, since the terminal for external connection and the notch for exposing the side surface of the proximal end portion, which are located at the edge portion of the bottom surface of the box body made of synthetic resin, are provided, The side surface of the terminal that can be placed on the solder land on the outside of the sidewall of the box body can be elongated without increasing the amount of protrusion from the box body, The molten solder tends to adhere to the upper surface of the terminal, and the solder contact area is greatly increased. As a result, the size of the electric component is not reduced, The soldering strength to the printed board can be increased.

Further, according to the installation structure of the switch device in the present invention, the edges of the cover portions of the electronic component are brought into contact with or close to each other with the ground pattern of the printed board, so that the static electricity charged to the electronic component can be reliably escaped , The tip of each part of the cover and the ground pattern of the printed board may not be soldered. That is, the material used for the cover does not need to be treated with tin plating or the like on the surface of the metal material, and expensive materials having good solderability are not required, so that the cost of the cover can be reduced.

According to the installation structure of the switch device of the present invention, the ends of the respective parts of the cover for discharging the static electricity charged in the switch device and the ground pattern of the printed circuit board are not required to be soldered. It is possible to make the soldering portion bent at a right angle at a right angle unnecessary, so that it can be made shorter than the conventional earth terminal, the yield of the material of the cover can be improved, and the cost of the cover can be reduced.

Further, according to the installation structure of the switch device in the present invention, since the tip of each part of the cover and the ground pattern of the printed board are not soldered, the amount of solder used can be reduced, and management for soldering becomes unnecessary.

According to the installation structure of the switch device of the present invention, the distance (x) from the front end of each part of the cover to the ground pattern of the printed board and the distance from the front end of each part of the cover to the circuit pattern (y), x &lt; y, the static electricity charged in the switch device can be reliably discharged to the ground pattern of the printed circuit board.

According to the installation structure of the switch device of the present invention, by steeper leading ends of the corner portions of the cover of the switch device, the static electricity charged in the switch device can be reliably transferred from one place to the printed board ground pattern . &Lt; / RTI &gt;

Claims (9)

A semiconductor integrated circuit device comprising: a wafer in which a common contact terminal, a fixed contact terminal and an external connection terminal are integrally molded; an insulative lever rotatable with respect to the wafer; A movable contact capable of contacting and disengaging with the fixed contact terminal along the rotation of the lever, and a twisted coil spring constantly urging the lever in a predetermined rotational direction, wherein the movable contact is elastically contacted with the common contact terminal Shaped sliding portion for curving the bottom surface of the free end side in sliding contact with the common contact terminal. The switching device according to claim 1, wherein the common contact terminal is formed in a shape to expand and project from the inner bottom surface of the wafer. The switch device according to claim 1, characterized in that the rotation direction of the lever, which uses the elastic repulsive force of the sliding portion as a rotational force, is in the same direction as the rotation direction of the lever that uses the biasing force of the twist- . The switch device according to any one of claims 1 to 3, wherein the curved shape of the free end side of the sliding portion is set to an arc shape with the center of the pivot of the lever as the center of the circle. In which a terminal for external connection which is led out from the box body to the bottom edge of the box body and which rises along the side wall of the box body is soldered to the solder land of the printed circuit board, Wherein a notch is provided in the sidewall of the box body so as to expose the side surface of the base end portion of the terminal located at the bottom edge portion of the box body. A switch device comprising: a box body made of a synthetic resin that forms an outer periphery; a conduction terminal for external connection provided on the box body; and a metal cover provided on each of the box bodies, And the front ends of the respective portions of the cover are brought into contact with the ground pattern of the printed circuit board. A switch device comprising: a box body made of a synthetic resin that forms an outer periphery; a conduction terminal for external connection provided on the box body; and a metal cover provided on each of the box bodies, And the front end of each part of the cover is brought close to the ground pattern of the printed circuit board. The printed circuit board according to claim 7, wherein a relationship between a proximity distance (x) from a front end of each corner portion to an earth pattern of the printed board and a distance (y) y is set to satisfy the following condition: &lt; EMI ID = 1.0 &gt; The installation structure of the switch device according to claim 6 or 7, wherein a tip of each corner portion is pointed.