JP4319885B2 - Push button switch - Google Patents

Description

  The present invention relates to a pushbutton switch used as an operation switch for various electronic devices, and more particularly to a thin lateral push type pushbutton switch.

  As a conventional push button switch structure, it has an inclined piece which is cut and raised from the lid to the inside of the housing and faces the movable contact, and is interposed between the inclined piece and the movable contact, and has an elastic operating part. There is known a pushbutton switch in which an operation member having a slidable operation member slides on an inclined piece by pressing of a pressing portion and presses a movable contact to switch the contact (for example, see Patent Document 1).

Hereinafter, the structure of a conventional pushbutton switch will be described with reference to the drawings.
FIG. 10 is an exploded perspective view of a conventional push button switch, and FIG. 11 is a cross-sectional view of the conventional push button switch.

  A conventional push button switch includes a housing 11 having an opening 10, fixed contacts 12 and 13 provided on an inner bottom portion of the opening 10, a movable contact 14 disposed on the fixed contacts 12 and 13, A dust-proof sheet 15 made of polyimide or the like provided on the contact 14, an operation member 16 that operates the movable contact 14 via the sheet 15, and a lid 17 that is attached to the top of the housing 10 and covers the opening. It consists of and.

The fixed contacts 12 and 13 are formed integrally with the housing 11 by insert molding, and external terminals 12 a and 13 a led out from the fixed contacts 12 and 13 are provided on the outer wall of the housing 11.
The housing 11 includes four protrusions 20 that protrude upward from the four corners, guide portions 21 that are provided in the vicinity of the protrusions 20, guide the operation member 16, and walls that protrude upward from one side end. Part 22, a block part 23 projecting outward from the other side end, and locking parts 24, 25 projecting outward from the projections 20 on the other side end and locking the lid body 17, respectively. ing.

The movable contact 14 is made of a thin metal plate having elasticity, and is disposed in the opening 10 of the housing 11. The movable contact 14 has two notches 26 parallel to the moving direction of the operation member 16, the peripheral portion 27 is always in contact with the fixed contact 12, and the central portion 28 is curved upward while the other portion is curved. Located on the stationary contact 13.
The dust-proof sheet 15 is placed on the upper surface 11 a of the housing 11, and the operation member 16 is placed on the sheet 15.

  The lid body 17 is provided at each of the four corners, and has a notch 30 that engages with each of the protrusions 20, a wall portion 31 that projects downward from the side end and abuts against the upper surface 11 a of the housing 11 and the upper end of the guide portion 21, and the like. A pair of arm portions 32 projecting downward from the side ends of the arm portions and engaging with the locking portions 24 and 25, respectively. The lid body 17 includes an inclined piece 33 that is cut and raised from the center portion to the inside of the housing 11 and faces the center portion 28 of the movable contact 14.

  The operating member 16 is provided with an operating portion 34 interposed between the inclined piece 33 and the central portion 28 of the movable contact 14, and a U-shape that is provided on the side of the operating portion 34 and slides on the guide portion 21. And a pressing portion 36 that protrudes outward from the side portion of the housing 11. The operating part 34 is connected to the pressing part 36 through the thin part 34a and has elasticity. Further, the inclined piece 33 engages with the opening 39 formed by the operating portion 34 and the guide portion 35.

  When the push button switch presses the pressing portion 36 of the operation member 16 in the leftward direction in FIG. 11 until it abuts against the block portion 23, the operation member is placed on the inclined piece 33 cut and raised from the lid body 17 to the inside of the housing 11. The 16 actuating parts 34 are guided by sliding, and accordingly, the actuating part 34 rotates counterclockwise in FIG. 11 while being elastically deformed by the thin part 34a. The central portion 28 of the movable contact 14 is pressed through the sheet 15. As a result, the central portion 28 is inverted downward and comes into contact with the fixed contact 13 to be switched on.

Utility model registration No. 2572590

  However, in the structure of the conventional push button switch described above, the lid is attached to the housing with the arm portion and the locking portion provided in the front-rear direction along the operation direction of the operation member. When the operating portion slides, the lid provided with the inclined piece is likely to float on the side opposite to the pressing direction of the movable contact.Therefore, variation occurs in the reversal position of the movable contact with respect to the operation amount of the operation member. There is a possibility that the feeling of operation may be deteriorated, and there is a problem that the push button switch is prevented from being thinned.

  Accordingly, it is an object of the present invention to provide a push button switch that solves the above-described problems, can obtain a good operation feeling, and can be thinned.

In order to solve the above-mentioned problems, the present invention provides as a first solution means a housing having a storage portion, a fixed contact provided on the inner bottom surface of the storage portion, and a movable contact disposed on the fixed contact. An operation member having a pressing portion protruding from a side portion of the housing and a flexible operation portion, and a lid body having an inclined piece cut and raised in the storage portion and attached to the upper surface of the housing. And a push button switch that presses the movable contact by sliding the actuating portion on the inclined piece and bending downward in accordance with a pressing operation of the pressing portion, wherein the housing includes an external connection terminal, The lid is formed of a metal plate, and an upper plate portion having the inclined piece, and both side portions that are located in a direction orthogonal to the operation direction of the operation member in the upper plate portion and face each other with the inclined piece interposed therebetween. From both sides of the housing Extending and a leg, at the time of pressing operation of the operating member, by the reaction when the actuating portion slides with the inclined piece of the part receives a reaction force from the actuating portion of the lid A deformation preventing portion that prevents the peripheral region from expanding in a direction opposite to the direction in which the movable contact of the storage portion is disposed is soldered to the surface mounting substrate at the tip of the leg portion simultaneously with the external connection terminal. It was configured by attaching and attaching .

As a second solution, the pressing portion and the external connection terminal are arranged at positions facing each other with the deformation preventing portion interposed therebetween.

Further, as a third solving means, the external connection terminal is arranged on the rear end side with respect to the operation direction of the operation member from the center of the housing, and the width of the leg portion is set to the width of the external connection terminal. The structure is formed wider than that.
As a fourth solution, a gap is formed between the leg portion and the side surface of the housing.

  As described above, the push button switch according to the present invention includes a housing having a storage portion, a fixed contact provided on the inner bottom surface of the storage portion, a movable contact disposed on the fixed contact, and a side portion of the housing. An operation member having a projecting pressing portion and a flexible operation portion, and a lid having an inclined piece cut and raised in the storage portion and attached to the upper surface of the housing, accompanying the pressing operation of the pressing portion A pushbutton switch that presses the movable contact by sliding the operating portion on the inclined piece and bending downward, and the lid having the inclined piece is provided with the movable contact of the storage portion when the operation member is pressed. Since the deformation preventing portion that prevents the bulging in the direction opposite to the direction is formed, even if the operating portion slides on the inclined piece during the pressing operation of the operating member, the deformation preventing portion does not lift the lid. So get a good operation feeling Along with the door can be, it is possible thinning of the switch.

In addition, a long rib is formed near the inclined piece of the lid along the operation direction of the operation member, and the deformation prevention part is configured by the rib. Therefore, deformation can be easily prevented without adding additional parts. Since the portion can be formed, it is possible to cope with low cost.
In addition, a part of the cover body is extended from both sides facing each other with an inclined piece to the operation direction of the operation member to form both sides of the housing, and a leg is formed. Since the deformation preventing portion is configured by providing and engaging the locking piece with the housing, the deformation preventing portion can be easily formed without adding a separate part, so that it is possible to cope with low cost. In addition, the lid can be reliably engaged with the housing by the locking piece of the leg.

The housing includes an external connection terminal, the lid is formed of a metal plate, and a part of the metal plate is opposed to the operation direction of the operation member from both sides opposed to each other with an inclined piece interposed therebetween. Since the deformation prevention part is configured by soldering and attaching the tip of the leg to the surface mounting substrate at the same time as the external connection terminal, the external connection terminal and the external connection terminal At the same time, by soldering the deformation preventing portion of the lid, it is possible to reliably prevent the lid from being lifted.
In addition, since the pressing portion and the external connection terminal are arranged at positions facing each other with the deformation prevention portion interposed therebetween, it is possible to prevent the push button switch from being peeled off by a rotational moment during operation with the external connection terminal as a fulcrum. .

In addition, since the external connection terminal is arranged on the rear end side with respect to the operation direction of the operation member from the center of the housing and the width of the leg portion is formed wider than the width of the external connection terminal, Since a large soldering area can be secured, the soldering can be performed firmly.
In addition, since a gap is formed between the leg portion and the side surface of the housing, it can be soldered from both sides of the plate surface of the leg portion. It is possible to prevent flux from entering the inside of the switch.

  Embodiments of the push button switch of the present invention are shown in FIGS. 1 is a plan view of the push button switch, FIG. 2 is a side view of the push button switch, FIG. 3 is a cross-sectional view of the main part of the push button switch, FIG. 4 is a cross-sectional view of the main part when the push button switch is pressed, and FIG. 6 is a side view showing a state in which the pushbutton switch is soldered and attached to the surface mounting board, and FIG. 7 is a side view showing a state in which the leg portion of the lid is widened and soldered. FIG. 9 is a plan view showing a state where ribs are formed on the lid, and FIG. 9 is a side view showing a state where locking portions are provided on the legs of the lid.

  As shown in FIG. 1 to FIG. 3 and FIG. 5, the pushbutton switch of this embodiment includes a housing 1 having a storage portion, a pair of fixed contacts 2, 3 provided facing the inner bottom surface of the storage portion, A movable contact 4 disposed on the fixed contacts 2 and 3, a dustproof sheet 5 made of polyimide or the like provided on the movable contact 4, and an operation member for operating the movable contact 4 via the dustproof sheet 5. 6 and a lid body 7 which is attached to the upper surface of the housing 1 and covers the storage portion.

  The housing 1 is made of an insulating material such as synthetic resin, is formed in a box shape with an opening on the top surface, and has a storage portion 1a. Also, projections 1b projecting upward are formed at the four corners on the upper surface side of the housing 1, and engaging recesses 7b formed at the four corners of the lid 7 to be described later are engaged and positioned on the projections 1b. Has become. Further, a cut window portion 1c is provided on one side of the housing 1, and a pressing portion 6d of an operation member 6 to be described later protrudes into the cut window portion 1c and is movably engaged in the pressing direction. It has become.

  In addition, a pair of fixed contacts 2 and 3 made of a conductive metal plate are integrally opposed to the inner bottom surface of the housing portion 1a of the housing 1 in a state where a part is exposed by a method such as insert molding. Arranged. Further, external connection terminals 2 a and 3 a led out from the fixed contacts 2 and 3 are provided so as to protrude outward from the side surface of the housing 1. The external connection terminals 2a and 3a project substantially parallel to the bottom surface of the housing 1, and then bend upward with the gap S formed along the side surface of the housing 1 for surface mounting. It is formed in a terminal shape (J bent shape).

  The movable contact 4 is made of a conductive thin metal plate having elasticity, and is disposed on the pair of fixed contacts 2 and 3 of the housing portion 1a of the housing 1, and its peripheral portion 4a is always in contact with one fixed contact 2. At the same time, the central portion 4b is disposed in a state of being opposed to the other fixed contact 3 in a state of being curved upward. Further, the central portion 4b is formed so that the curved portion can be reversed when pressed, and is brought into contact with the fixed contact 3 during the reversal.

  The dustproof sheet 5 is made of an insulative resin sheet such as polyimide, and is disposed on the upper surface of the housing 1 so as to cover the housing portion 1a. An operation member 6 described later is placed on the dustproof sheet 5, and the central portion 4 b of the movable contact 4 is pressed by the operating portion 6 a of the operation member 6 through the dustproof sheet 5.

  The operation member 6 is made of an insulating material such as a synthetic resin. The operation member 6 includes a base portion 6b having a square shape and an opening 6a at the center, and a cantilever projecting from the opening 6a. A flexible actuating portion 6c and a pressing portion 6d projecting outward from the cut window portion 1c of the housing 1 are formed. The operating portion 6c is connected to the pressing portion 6d through a thin arm portion 6e, and the operating portion 6c can be elastically displaced downward by bending the arm portion 6e.

  The operation member 6 is placed on the upper surface of the dustproof sheet 5 placed on the upper surface of the housing 1, and the pressing portion 6 d protruding from the cut window portion 1 c of the housing 1 is pressed, whereby the housing 1 is stored. It is arranged in the part 1a so as to be slidable in the lateral direction.

  The lid body 7 is formed by punching and bending a conductive metal plate, and is provided with a flat plate-like upper plate portion 7 a and four corners of the upper plate portion 7 a, and a protrusion 1 b on the upper surface side of the housing 1. And an engaging recess 7b that engages with each other, and a leg that protrudes from a pair of opposing side ends of the upper plate portion 7a, is bent in a state where a gap S is formed along the side surface of the housing 1, and extends downward. A part 7c and a plurality of engaging arm parts 7d that protrude downward from the other side end and engage with engaging parts (not shown) of the housing 1 are provided.

  Further, the upper plate portion 7 a of the lid body 7 is cut and raised from the center portion to the inside of the housing portion 1 a of the housing 1, and the distal end side thereof is inserted into the opening portion 6 a provided in the base portion 6 b of the operation member 6. Thus, an inclined piece 7e facing the central portion 4b of the movable contact 4 is formed. The inclined piece 7e is formed to be bent downward, and the operating portion 6c provided at the tip of the flexible arm portion 6e of the operating member 6 slides on the inclined surface of the inclined piece 7e. As a result, the operating portion 6c is pushed down, and the central portion 4b of the movable contact 4 is pressed downward.

  Further, the leg portion 7 c that protrudes from a pair of opposing side edges of the upper plate portion 7 a of the lid body 7 and extends downward is formed with respect to the operating direction of the operating member 6, the inclined piece 7 e. It is formed to extend to both side surfaces of the housing from opposite sides facing each other.

  In order to assemble the pushbutton switch having the above-described configuration, first, the movable contact 4 is placed in the housing 1a of the housing 1, the movable contact 4 is covered with the dustproof sheet 5, and the periphery of the dustproof sheet 5 is surrounded by the housing 1. Paste on top. Next, after the operation member 6 is disposed on the dustproof sheet 5, the lid body 7 is placed on the housing 1. At this time, the projections 1b are respectively fitted into the engagement recesses 7b formed at the four corners, and the engagement arm portions 7d are respectively engaged with the engagement portions (not shown) of the housing 1 to complete the process.

Next, the operation of the pushbutton switch having the above configuration will be described with reference to FIGS.
First, in the initial state when the operating member 6 is not pressed, the operating portion 6c of the operating member 6 is located near the root of the bent portion of the inclined piece 7e of the lid 7 as shown in FIG. The movable contact 4 and the fixed contact 3 are separated from each other without being elastically displaced downward.

  From this state, when the pressing portion 6d of the operating member 6 is pressed in the right direction in FIG. 4, the operating portion 6c of the operating member 6 slides on the inclined surface of the inclined piece 7e cut and raised inside the housing 1 from the lid body 7. Accordingly, the operating portion 6c is rotated downward (clockwise) as shown in FIG. 4 while being elastically displaced by the arm portion 6e. Accordingly, the tip of the operating portion 6c is attached to the dustproof sheet 5. The central portion 4b of the movable contact 4 is pressed via

  As a result, the central portion 4b is inverted downward to come into contact with the fixed contact 3, and the switch is turned on. When the pressing state of the pressing portion 6d is released from this state, the operating portion 6c slides on the inclined surface of the inclined piece 7e while rotating in the upward (counterclockwise) direction of FIG. 4 by the elastic force of the arm portion 6e itself. As a result, the operating member 6 slides leftward in FIG. 4 and returns to the initial state. At this time, with the rotation of the operating portion 6c, the central portion 4b of the movable contact 4 is also turned upward by the elastic force and separated from the fixed contact 3, and the switch is turned off.

6 and 7 show a state in which the pushbutton switch having the above-described configuration is surface-mounted and mounted on a mounting board such as an electronic device (not shown).
In this case, the external connection terminals 2 a and 3 a for surface mounting formed so as to protrude from the side surface of the housing 1 are attached to the mounting substrate 8 by soldering with the solder 9. At the same time, leg portions 7c that protrude from a pair of opposing side edges of the upper plate portion 7a of the lid 7 and are bent in a state in which a gap S is formed along the side surface of the housing 1 and extend downward are provided. The tip side is similarly soldered and attached with the solder 9.

In the operation process of the pushbutton switch having the above-described configuration, the center of the upper plate portion 7a of the lid body 7 is elasticized by the reaction of the operating portion 6c of the operating member 6 sliding on the inclined surface of the inclined piece 7e. It is urged upward by the generated force to swell.
However, in this configuration, the lid body 7 is formed of a metal plate, and a part of the lid body 7 is opposed to the operation direction of the operation member 6 from both side portions facing each other with the inclined piece 7e interposed therebetween. Since the leg portion 7c is formed by extending to the surface and the tip of the leg portion 7c is soldered and attached to the surface mounting substrate 8 simultaneously with the external connection terminals 2a and 3a, By soldering the leg portion 7c (deformation preventing portion) of the lid body 7 simultaneously with the external connection terminals 2a and 3a at the time of mounting, the lid body can be reliably prevented from being lifted.

  In FIG. 7, the external connection terminals 2a and 3a are arranged on the rear end side of the housing 1 with respect to the operation direction of the operation member 6, and the width W1 of the leg portion 7c. Is formed to be wider than the width W2 of the external connection terminals 2a and 3a. By forming the leg portion 7c in this way, a large soldering area of the leg portion 7c can be ensured, so that the soldering with the solder 9 can be performed firmly.

  Further, since the pressing portion 6d of the operating member 6 and the external connection terminals 2a and 3a are respectively arranged at positions facing each other with the leg portion 7c (deformation preventing portion) interposed therebetween, the pressing portion 6d is moved upward during the pressing operation. Even if the rotation moment at the time of pressing operation is applied to the pushbutton switch with the external connection terminals 2a and 3a as fulcrums, the leg portion 7c is firmly soldered, so that the pushbutton switch is peeled off. Can be prevented.

  Moreover, in this structure, since the space | gap S was formed between the leg part 7c and the side surface of the housing 1, since the solder 9 can be penetrate | infiltrated from both sides of the board surface of the leg part 7c, it can solder. In addition to soldering, it is possible to prevent flux from entering the inside of the switch through the leg 7c and the side surface of the housing 1 during the soldering.

  FIG. 8 shows an elongated rib by a method such as a protrusion along the operation direction of the operation member 6 on both sides in the vicinity of the inclined piece 7e provided on the upper plate portion 7a of the lid body 7. 7f (deformation prevention part) is formed. In this way, by forming the rib 7f on the upper plate portion 7a, the lid body 7 becomes difficult to be deformed. Therefore, the deformation preventing portion can be easily formed without adding additional parts, so that it is possible to cope with low cost. .

  Further, FIG. 9 shows that the end of a leg 7c formed by extending from both sides of the lid 7 to both sides of the housing 1 is bent inward to provide locking pieces 7g, and both sides of the housing 1 are shown. A locking groove 1d is provided on the surface. Then, by engaging the locking piece 7g with the locking groove 1d, the center of the upper plate portion 7a can be prevented from swelling upward, and the lid body 7 is difficult to be deformed. Since the deformation preventing portion can be easily formed without doing so, it is possible to cope with low cost, and the lid 7 can be reliably engaged with the housing 1 by the locking piece 7g of the leg portion 7c.

  In this case, it is not necessary to solder the leg portion 7c of the lid body 7 to the surface mounting substrate 8. If only the external connection terminals 2a and 3a are soldered to the surface mounting substrate 8, they are attached. It will be good.

  According to the above-described embodiment of the present invention, the operating portion 6c of the operating member 6 slides on the inclined surface of the inclined piece 7e of the lid body 7 in accordance with the pressing operation of the pressing portion 6d of the operating member 6. In the configuration of the push button switch that presses the movable contact 4 disposed below by bending and turns on the switch, the lid body 7 having the inclined piece 7e is movable in the storage portion 1a when the operation member 6 is pressed. A leg portion 7c that can be soldered to the surface mounting substrate 8 and an upper plate portion 7a of the lid 7 as a deformation preventing portion that prevents the contact 4 from bulging in the direction opposite to the direction in which the contact 4 is disposed (upward). Since the engaging piece 7g that engages with the engaging groove 1d of the housing 1 is formed, the operating portion 6c slides on the inclined surface of the inclined piece 7e when the operating member 6 is pressed. Even so, it is possible to prevent the lid 7 from being lifted by these deformation prevention portions. In, it is possible to obtain a good operation feeling, which is assumed to thinning of the switch can be achieved.

It is a top view which shows the pushbutton switch of this invention. It is a side view which shows the pushbutton switch of this invention. It is principal part sectional drawing which shows the pushbutton switch of this invention. It is principal part sectional drawing which shows the time of pressing of the pushbutton switch of this invention. It is a top view which shows the housing of the pushbutton switch of this invention. It is a side view which shows the state which soldered and attached the pushbutton switch of this invention to the board | substrate for surface mounting. It is a side view showing the state where the leg part of the lid of the present invention was widened and soldered and attached. It is a top view which shows the state which formed the rib in the cover body of the pushbutton switch of this invention. It is a side view which shows the state which provided the latching | locking part in the leg part of the cover body of the pushbutton switch of this invention. It is a disassembled perspective view which shows the conventional pushbutton switch. It is sectional drawing which shows the conventional pushbutton switch.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1: Housing 1a: Storage part 1b: Protrusion 1c: Cutting window part 1d: Locking groove 2: Fixed contact 2a: External connection terminal 3: Fixed terminal 3a: External connection terminal 4: Movable contact 4a: Peripheral part 4b: Center part 5 : Dustproof sheet 6: Operation member 6a: Opening part 6b: Base part 6c: Actuating part 6d: Pressing part 6e: Arm part 7: Lid 7a: Upper plate part 7b: Engaging recess 7c: Leg part 7d: Engaging Arm 7e: Inclined piece 7f: Rib 7g: Locking piece 8: Substrate 9: Solder

Claims (4)

A housing having a storage portion, a fixed contact provided on the inner bottom surface of the storage portion, a movable contact disposed on the fixed contact, a pressing portion protruding from a side portion of the housing, and a flexible operation An operating member having a portion, and a lid having an inclined piece cut and raised in the storage portion and attached to the upper surface of the housing, and the operating portion is disposed on the inclined piece in accordance with a pressing operation of the pressing portion. A pushbutton switch that presses the movable contact by sliding and bending downward,
The housing includes an external connection terminal, the lid is formed of a metal plate, and the upper plate portion having the inclined piece is positioned in a direction orthogonal to the operation direction of the operation member in the upper plate portion, Leg portions extending to both side surfaces of the housing from opposite side portions across the inclined piece;
During the pressing operation of the operating member, the movable contact point of the storage portion is a peripheral region of the portion that receives the reaction force from the operating portion in the lid due to a reaction when the operating portion slides with the inclined piece. The deformation preventing portion for preventing the swelling in the direction opposite to the disposed direction is configured by soldering and attaching the tip end of the leg portion to the surface mounting substrate simultaneously with the external connection terminal. Push button switch. Push button switch according to claim 1, characterized in that a said pressing portion and the external connection terminal at a position facing each other across the deformation preventing portion. The external connection terminal is arranged on the rear end side from the center of the housing with respect to the operation direction of the operation member, and the width of the leg portion is formed wider than the width of the external connection terminal. The push button switch according to claim 1 . The pushbutton switch according to any one of claims 1 to 3 , wherein a gap is formed between the leg portion and a side surface of the housing.

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