JP2005267929A - Switching device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a switch device having improved contact reliability of a contact part by restraining backlashes to be generated, when sliding a movable contact, and by preventing the intrusion of dusts into a contact part. <P>SOLUTION: The switch device is composed of a housing 1 having a housing part, a plurality of fixed contacts 2 arranged in the housing part, a driving member 4 having a movable contact 6 contacting the fixed contacts 2 in sliding, slide movement freely houses inside the housing, and a cover covering the housing part of the housing 1. A first housing part 1d housing the fixed contacts 2 and a second housing part 1e housing the movable contact 4 are formed in the housing part, and a continuous wall-shaped partition 1c, protruding from bottom face of the housing part toward upper face part of the housing, is formed between the first housing part 1d and the second housing part 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a slide operation type switch device used for switching various signals of electronic equipment and the like.

  As a structure of the conventional switch device, a plurality of fixed contact pieces are arranged on the bottom surface of the substrate, and the movable contact piece is held on a slide member that is slidably held on the substrate. The thing of the structure which made the part selectively contact a fixed contact piece is known (for example, refer patent document 1).

Hereinafter, the structure of a conventional switch device will be described with reference to the drawings.
FIG. 5 is an exploded perspective view of a conventional switch device.

  The conventional switch device includes a substrate 10 on which a plurality of fixed contact pieces 15 are arranged, a slide member 16 that has a knob portion 16a and moves on the substrate 10 in the arrangement direction of the fixed contact pieces 15 by operation of the knob portion 16a. The movable contact piece 20 is held by the slide member 16 and moves together with the slide member 16 to selectively contact the plurality of fixed contact pieces 15.

  The substrate 10 is an insulating substrate made of resin, and three fixed contact pieces 15 are arranged in the center, and pin-like terminals 15a attached to a wiring board (not shown) project downward from the fixed contact pieces 15. Is formed. In addition, positioning pins 12 that are positioned on the wiring board protrude from the lower surface of the substrate 10, and convex portions 14 for imparting moderation are formed on one side surface.

  The slide member 16 is a resin molded product, and a knob portion 16a is protruded on the side surface of the slide member 16, and an open recessed portion 17 is formed on the lower surface. The movable contact piece 20 is accommodated and held in the recessed portion 17. ing. The lower surface of the slide member 16 is a substrate sliding surface A that is in sliding contact with the upper surface of the substrate 10, and projecting pieces 18 that protrude downward are provided on both sides, and the inner surface of the sliding member 16 is in sliding contact with the side surface of the substrate 10. It is referred to as a moving surface B. In addition, a moderation imparting piece 19 having a projection 19 a that is in sliding contact with the moderation imparting convex portion 14 of the substrate 10 is formed at the center of one side surface.

  The movable contact piece 20 is formed by bending a conductive metal plate. The movable contact piece 20 has a pair of clip portions 21, and a contact portion 21 a that slides on the fixed piece 15 is provided on both side plate portions of the clip portion 21. . Then, the slide member 16 is configured such that the substrate sliding surfaces A and B are placed on the upper surface of the substrate 10 and the clip member 21 of the movable contact piece 20 accommodated in the recessed portion 17 is fitted to the fixed contact piece 15 on the substrate 10. The substrate 10 is slidably held on the side surface.

  In the switch device, the slide member 16 is moved by the sliding operation of the knob portion 16a to switch the switch, and the movable contact piece 20 slides on the plurality of fixed contact pieces 15 on the substrate 10. Each fixed contact piece 15 is connected via the movable contact piece 20 and is turned on.

JP-A-8-161971

  However, in the structure of the conventional switch device described above, a movable contact piece (movable contact) that is in sliding contact with a fixed contact piece (fixed contact) is held on a slide member that is slidably held on the substrate. Since the knob part for external operation is integrally projected on the member, foreign matter such as dust and dust can easily enter the contact part from the opening of the set etc. where the knob part projects, making contact unstable and making contact reliable There was a problem that the performance decreased. Further, since the movable contact piece is held loosely fitted on the slide member, there is a problem that the movable contact piece is likely to be loose when the slide member slides.

  Therefore, the present invention solves the above-described problems, suppresses the occurrence of backlash when the movable contact slides, and prevents contact of dust and the like into the contact portion, thereby improving the contact reliability of the contact portion. The purpose is to provide.

  In order to solve the above-mentioned problems, the present invention has as a first solution means a housing having a storage portion, a plurality of fixed contacts disposed in the storage portion, and a movable contact that is in sliding contact with these fixed contacts. And a drive member housed in the housing so as to be slidable, and a cover for covering the housing portion of the housing, wherein the housing portion includes a first housing portion in which the fixed contact is disposed, and the drive A second housing part for housing the member is provided, and a continuous bag protruding from the inner bottom surface of the housing part toward the upper surface part of the housing is provided between the first housing part and the second housing part. A configuration in which a partition wall is formed.

As a second solving means, the movable contact is formed integrally with the drive member, and the drive member is connected to the drive member by a connecting bar portion extending from the vicinity of the upper surface of the drive member. It was set as the structure protruded and hold | maintained from the main body.
Further, as a third solving means, the movable contact is accommodated in the state where the driving member is accommodated in the second accommodating portion, and the connecting rail portion of the movable contact is stretched over the upper surface of the partition wall of the housing. While being accommodated in the 1st accommodating part, it was set as the structure which the contact part of the said movable contact contacts the said fixed contact arrange | positioned in the said 1st accommodating part with the sliding movement of the said drive member.

  As described above, the switch device of the present invention has a housing having a storage portion, a plurality of fixed contacts disposed in the storage portion, and a movable contact that is in sliding contact with the fixed contact, and is slidably received in the housing. A drive member and a cover that covers the housing storage portion, and the storage portion includes a first storage portion in which the fixed contact is disposed, and a second storage portion in which the drive member is stored, Since a continuous bowl-shaped partition wall protruding from the inner bottom surface of the housing portion toward the upper surface portion of the housing is formed between the first housing portion and the second housing portion, the housing is formed from the inner bottom surface of the housing portion. Since the first storage part in which the fixed contact is disposed and the second storage part in which the driving member is accommodated are separated by the continuous bowl-shaped partition protruding in the direction of the upper surface of the contact part, the contact part is disposed. Preventing entry of dust into the first storage unit Can, it is possible to improve the contact reliability.

Further, the movable contact is formed so as to be integrally embedded in the drive member, and the contact portion protrudes from the drive member main body and is held by a connecting bar portion extending from the vicinity of the upper surface of the drive member. Since the movable contact is formed integrally with the drive member, play of the movable contact during sliding of the drive member is suppressed and stable contact can be obtained.
Further, the driving member is accommodated in the second accommodating portion, and the movable contact is accommodated in the first accommodating portion in a state where the connecting contact portion of the movable contact is stretched over the upper surface of the partition wall of the housing. With the sliding movement, the contact portion of the movable contact is brought into sliding contact with the fixed contact disposed in the first storage portion, so that the partition between the driving member and the movable contact is reliably separated by the partition wall. Therefore, it is possible to prevent dust from entering the contact portion.

  Embodiments of the switch device of the present invention are shown in FIGS. 1 is an exploded perspective view of the switch device of the present invention, FIG. 2 is a plan view of the switch device of the present invention, FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. It is a top view which shows the state removed.

  In the figure, the housing 1 is formed in a box shape with an opening on the top surface, which is made of an insulating material such as a synthetic resin and has a concave storage portion inside. In addition, a long groove-like window hole 1 a that opens outward from the storage portion is provided in the center of one side of the housing 1. Also, a pair of engaging protrusions 1b and 1b are provided at one corner of the housing 1 where the window hole 1a is provided and at the four corners on the other side facing the housing. Engagement pieces 7c and 7c of a cover 7 which will be described later are engaged with the protrusions 1b and 1b, and the cover 7 is fitted on the upper surface side of the housing 1.

  In addition, a continuous bowl-shaped partition wall 1c is provided at the center of the inner bottom surface of the housing portion of the housing 1 so as to protrude from the inner bottom surface of the housing portion toward the upper surface portion of the housing 1 and sandwich the partition wall 1c. The first storage portion 1d and the second storage portion 1e are provided on both sides. Of these, one second storage portion 1e is provided with a guide protrusion 1f that guides the movement of a drive member 4 (described later) when the drive member 4 slides. Further, a notch portion is provided in the central portion of the guide protrusion 1f, and both end surfaces facing each other of the notch portion are contact portions 1g and 1g of both winding ends of the return spring 5 which is an elastic member described later. It has become.

  The other first storage portion 1d is provided with a plurality of fixed contacts 2 made of a conductive metal plate. The fixed contact 2 is formed of a thin metal plate such as brass, and a base portion thereof is integrally embedded in the inner bottom portion of the housing 1 by a method such as insert molding. In addition, the fixed contact 2 has a center contact portion 2a, one end of which is erected from the inner bottom surface of the first storage portion 1d, and a pair of erected on both sides of the center contact portion 2a. Peripheral contact portions 2b and 2c are provided, and the central contact portion 2a and the peripheral contact portions 2b and 2c are provided side by side along a slide movement direction of the driving member 4 described later.

  Further, a connecting terminal portion 3 connected to a circuit pattern or the like of a circuit board (not shown) such as an electronic device is provided on the other end side of the fixed contact 2. The connection terminal portion 3 is electrically connected to the base portion of the fixed contact 2 in the bottom surface portion of the housing 1 and is formed to protrude outward from the opposite side surface portions of the housing 1. The connection terminal portion 3 is connected to a circuit pattern or the like on the circuit board, and a contact point switching signal is output.

  The drive member 4 includes a slide portion 4a formed in a substantially square shape with an insulating material such as synthetic resin, and an operation portion 4b protruding from one side surface portion of the slide portion 4a. A concave groove (not shown) for holding (accommodating) a coiled return spring 5 that is an elastic member for returning the drive member 4 to the neutral position is provided at the center on the lower surface side of the slide portion 4a. In addition, a guide groove 4c having a width narrower than that of the groove is provided on both sides of the groove. The guide groove 4c is slidably engaged with the guide protrusion 1f of the second storage portion 1e, so that the slide portion 4a of the drive member 4 is slidably received in the second storage portion 1e. It is supposed to be.

  Thus, the elastic member for returning the drive member 4 to the neutral position is formed by the coiled return spring 5, and this coiled return spring 5 is provided on the lower surface of the slide portion 4 a of the drive member 4. Since the groove is held in the groove, the drive member 4 can be surely self-returned to the neutral position by using a coiled spring having a simple structure.

  A movable contact 6 made of a conductive thin metal plate such as phosphor bronze for a spring is held on the other side surface of the slide portion 4a of the drive member 4, and the base of the movable contact 6 is The slide part 4a is formed by being embedded integrally by a method such as insert molding. Further, a substantially U-shaped connecting beam portion 6a is extended from both ends of the other side surface portion of the slide portion 4a, and a pair of clip-shaped contact portions 6c are provided at the center of the connecting beam portion 6a. , 6c are formed.

  The movable contact 6 has a pair of opposed arm portions 6b, 6b extending downward from the connecting beam portion 6a, and a sliding movement direction of the drive member 4 (at the tip of the arm portions 6b, 6b ( A pair of the clip-like contact portions 6c and 6c extending along the direction bent 90 degrees from the arm portion 6b is provided. A hollow portion 6d is formed at the center of the arm portions 6b and 6b, and the clip-shaped contact portions 6c and 6c are provided on both sides of the hollow portion 6d.

  When the slide portion 4a of the drive member 4 is housed in the second housing portion 1e and is in the neutral position, the movable contact 6 has the cavity 6d on the central contact portion 2a of the fixed contact 2. The clip-shaped contact portions 6c, 6c are disposed in a state of being separated from the peripheral contact portions 2b, 2c disposed on both sides of the central contact portion 2a. It has become.

  In this way, the hollow portion 6d is formed in the center of the movable contact 6, and a pair of clip-like contact portions 6c extending along the sliding direction of the drive member 4 on both sides of the hollow portion 6d. 6c, and in the neutral position of the drive member 4, the central contact portion 2a of the fixed contact 2 is positioned in the hollow portion 6d, and the clip-shaped contact portions 6c, 6c are separated from the fixed contact 2. Since the movable contact 6 is in a free state with the fixed contact 2 in the initial state, the workability at the time of assembly is facilitated, and deformation or damage of the contact portion can be prevented. Yes.

  The drive member 4 is accommodated in the first and second accommodating portions 1d and 1e of the housing 1, and the operation portion 4b of the slide portion 4a accommodated in the second accommodating portion 1e is a window of the housing 1. The drive member 4 is inserted into the hole 1a so as to be slidable and the operation part 4b is operated through the window hole 1a. It slides within 1e.

  Further, between the first and second storage portions 1d and 1e of the housing 1, a continuous bowl-shaped partition wall 1c protruding from the inner bottom surface of the storage portion toward the top surface portion of the housing 1 is provided. When the slide portion 4a of the driving member 4 is accommodated in the second accommodating portion 1e, the connecting rail portion 6a of the movable contact 6 is stretched over the upper surface of the partition wall 1c of the housing 1. In this state, the movable contact 6 is accommodated in the first accommodating portion 1d.

  Then, as the drive member 4 slides, the contact portion 6c of the movable contact 6 is brought into sliding contact with the fixed contact 2 disposed in the first storage portion 1d. Since the member 4 and the movable contact 6 can be reliably separated by the partition wall 1c, the entry of dust into the contact portion can be prevented.

  The cover 7 is formed in a substantially square shape by punching and bending a metal plate, and a flat plate-like upper plate portion 7a, and a mounting plate portion 7b bent downward by 90 degrees from four corners of the upper plate portion 7a. And have. Further, an engagement piece 7c extending in an L shape toward the outside is provided on the distal end side of the mounting plate portion 7b. The cover 7 is fitted to the upper surface side of the housing 1 by being engaged with the formed engaging protrusion 1b.

Next, the operation of the switch device configured as described above will be described.
First, as shown in FIG. 4, the drive member 4 is held in the neutral position when no external force is applied to the operation portion 4 b. At this time, the slide portion 4a of the drive member 4 is neutralized by the return spring 5 in a state in which the guide groove portion 4c is engaged with the guide projection 1f of the second storage portion 1e of the housing 1 and is movable in the left and right sliding directions. Energized and held in position.

  At this time, the movable contact 6 integrally held by the drive member 4 is formed such that the central contact portion 2a of the fixed contact 2 disposed in the first storage portion 1d is a hollow portion between the arm portions 6b provided in the center. 6d is arranged so as to cover, and a pair of clip-like contact portions 6c, 6c provided on both sides are separated from the peripheral contact portions 2b, 2c provided on both sides of the central contact portion 2a The movable contact 6 and the fixed contact 2 are separated from each other, and the switch is turned off.

  From this state, for example, when an external force in the left direction indicated by an arrow A in FIG. 4 is applied to the operation portion 4b, the slide portion 4a also moves in the left direction in the drawing. Slide to the left in the figure against the biasing force.

  Then, the movable contact 6 held integrally with the drive member 4 slides in the left direction in the drawing as the drive member 4 moves, so that the pair of clip-like contact portions 6c and 6c of the movable contact 6 are The central contact 2a and the peripheral contact 2b of the fixed contact 2 come into contact with each other, and the central contact 2a and the peripheral contact 2b of the fixed contact 2 are connected via the movable contact 6 so that the switch is turned on. Become. Then, the ON signal is output to a control circuit such as an external electronic device via the connection terminal portion 3 derived from the fixed contact 2.

  When the external force to the operation unit 4b is removed from this state, the drive member 4 moves to the right in the figure as the slide part 4a slides to the right in the figure by the biasing force of the return spring 5. It will return to the initial position. At this time, the movable contact 6 is also slid to the right in the figure, the pair of clip-like contact portions 6c, 6c are separated from the central contact portion 2a and the peripheral contact portion 2b of the fixed contact 2, and the switch is turned off.

Since the same operation is performed when the operation unit 4b is operated in the opposite direction, which is the right direction in the figure, the description thereof is omitted.
As described above, the movable contact 6 is formed so as to be integrally embedded in the drive member 4, and the clip-shaped contact portions 6 c and 6 c extend from the vicinity of the upper surface of the drive member 4. Since the movable contact 6 is formed integrally with the drive member 4 because it protrudes from the main body of the drive member 4 by 6a, the play of the movable contact 6 at the time of sliding of the drive member 4 occurs. Is suppressed and stable contact is obtained.

  In the above embodiment, the coiled return spring 5 is held in the recessed groove portion provided on the lower surface of the slide portion 4a of the drive member 4, and has been described as a self-return type switching device. Not limited to this, a switch of a switching type that holds (locks) the drive member 4 to the operating position in the operated direction by not mounting the return spring 5 when it is not necessary to self-return to the neutral position. An apparatus can also be constructed. In addition, if a click cam portion (not shown) made of a concavo-convex cam is separately formed on the housing 1 or the drive member 4 to be engaged with and disengaged from each other, a switch device with a click mechanism can be configured. it can.

  According to the above-described embodiment of the present invention, the fixed contact is provided in the housing portion that has the movable contact 6 that is slidably contacted with the fixed contact 2 and that houses the drive member 4 that is slidably accommodated in the housing 1. 2 is provided, and a second storage portion 1e in which the driving member 4 is stored is provided between the first storage portion 1d and the second storage portion 1e. Since the continuous bowl-shaped partition wall 1c protruding from the inner bottom surface of the storage portion toward the upper surface portion of the housing 1 is formed, the continuous flange protruding from the inner bottom surface of the storage portion toward the upper surface portion of the housing 1 is formed. The first storage part 1d in which the fixed contact 2 is disposed and the second storage part 1e in which the driving member 4 is stored are separated by the partition wall 1c. To the first storage portion 1d in which the movable contact 6 is disposed It is possible to prevent intrusion of dust or the like, has become what can be improved contact reliability.

It is a disassembled perspective view which shows the switch apparatus of this invention. It is a top view which shows the switch apparatus of this invention. It is sectional drawing in the 3-3 line of FIG. 2 of this invention. It is a top view which shows the state which removed the cover of the switch apparatus of this invention. It is a disassembled perspective view which shows the conventional switch apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1: Housing 1a: Window hole 1b: Engagement protrusion 1c: Partition 1d: 1st storage part 1e: 2nd storage part 1f: Guide protrusion 1g: Contact part 2: Fixed contact 2a: Center contact part 2b : Peripheral contact portion 2c: peripheral contact portion 3: connection terminal portion 4: drive member 4a: slide portion 4b: operation portion 4c: guide groove portion 5: return spring 6: movable contact 6a: connecting bar portion 6b: arm portion 6c: contact point Part 6d: Cavity part 7: Cover 7a: Upper plate part 7b: Mounting plate part 7c: Engagement piece

Claims (3)

  A housing having a housing portion; a plurality of fixed contacts disposed in the housing portion; a driving member having a movable contact sliding in contact with the fixed contacts; and being slidably housed in the housing; and the housing A cover for covering the storage portion, and the storage portion is provided with a first storage portion in which the fixed contact is disposed, and a second storage portion in which the driving member is stored. A switch device characterized in that a continuous bowl-shaped partition wall protruding from the inner bottom surface of the housing portion toward the top surface portion of the housing is formed between the housing portion and the second housing portion.   The movable contact is formed so as to be embedded in the drive member integrally, and the contact portion protrudes from the drive member main body by a connecting bar extending from the vicinity of the upper surface of the drive member. The switch device according to claim 1. The driving member is accommodated in the second accommodating portion, and the movable contact is accommodated in the first accommodating portion in a state where the connecting rail portion of the movable contact is stretched over the upper surface of the partition wall of the housing. The contact portion of the movable contact is slidably contacted with the fixed contact disposed in the first storage portion as the drive member slides. Switch device.

Images