JP2011150870A - Push-on switch - Google Patents

Abstract

[PROBLEMS] To provide a push-on switch used for an input operation unit of various electronic devices, which can be stably operated even when operated with an operation button in an operation direction inclined with respect to a mounted circuit board surface. With the goal.
SOLUTION: An operating portion 7B of an operating body 7 is covered with a cover plate 21 arranged to protrude forward from a hole in a flat plate portion 21A, and from both opposite end portions of the flat plate portion 21A along a side surface of a switch case 1. Each of the legs 21C extending toward the rear is extended, and a lower end 21D, which is a part of the outer shape of the legs 21C, rises toward the rear with respect to the operation direction of the switch. It was assumed to be formed in an inclined shape.
[Selection] Figure 1

Description

  The present invention relates to a push-on switch used for an input operation unit of various electronic devices.

  Push-on switches used in the input operation section of various electronic devices have a configuration in which operation buttons are provided not only on the top and side flat portions of the electronic device housing but also on inclined portions as the electronic devices become smaller. Has also come out.

  A conventional push-on switch that is used with an operation button provided on such an inclined portion will be described with reference to FIGS.

  8 is an external view of a conventional push-on switch, FIG. 9 is an exploded perspective view thereof, and FIG. 10 is a side sectional view thereof.

  In FIG. 1, reference numeral 1 denotes a switch case made of an insulating resin having a substantially rectangular shape when viewed from the front, which includes a main body portion 1A having a recessed portion that is open at the front and a protruding portion 1B that protrudes rearward from the upper portion of the main body portion 1A. Thus, the central fixed contact 2 and the outer fixed contact 3 are exposed at two symmetrical positions spaced apart from the central fixed contact 2 on the inner bottom surface of the recess, and are connected to the central fixed contact 2 and the outer fixed contact 3, respectively. A terminal 4 is provided from the lower surface of the projecting portion 1B of the switch case 1 along the rear surface.

  The center fixed contact 2, the outer fixed contact 3, and each terminal 4 are insert-molded with an insulating resin to form a switch case 1.

  Reference numeral 5 denotes a movable contact made of an elastic metal thin plate formed in a forward convex circular dome shape. The outer peripheral end is placed on the outer fixed contact 3 and the rear surface of the dome-shaped apex is opposed to the central fixed contact 2 with a gap. Thus, the movable contact 5 is held in the recess by being adhered to the switch case 1 so as to be accommodated in the recess of the switch case 1 and from the front so that the insulating sheet 6 having flexibility closes the recess.

  7, a pressing portion 7C protruding rearward from the flange portion 7A corresponds to the dome-shaped apex position of the movable contact 5 via the insulating sheet 6, and an operation portion 7B protruding forward from the flange portion 7A. It is an operating body. Reference numeral 8 denotes a cover plate that is arranged by projecting the operation portion 7B forward from the middle hole, and locking portions 8B provided at four corners of the flat plate portion 8A that holds the flange portion 7A of the operation body 7 on the rear surface. However, it is locked and fixed to the corresponding four locking projections 1C of the switch case 1. In this state, the operating body 7 is movable back and forth.

  The conventional push-on switch is configured as described above, and the operation thereof will be described next.

  First, when the operating portion 7B of the operating body 7 is pressed from the front, the rear pressing portion 7C presses the dome-shaped apex portion of the movable contact 5 via the insulating sheet 6. When the pressing force exceeds a predetermined magnitude, the dome-shaped central portion of the movable contact 5 is elastically inverted to a rear convex shape with a light moderation feeling, and as shown in FIG. Contacts the central fixed contact 2 facing backward. As a result, the outer fixed contact 3 and the central fixed contact 2 are brought into conduction through the movable contact 5, and the corresponding terminals 4 provided on the projecting portion 1B of the switch case 1 are switched on.

  Further, when the pressing force applied to the operation portion 7B is released, the dome-shaped central portion of the movable contact 5 is elastically restored to the original front convex shape with a light moderation feeling, and the return force causes the insulating sheet 6 to pass through. Thus, the operating body 7 is urged forward, and the front surface of the flange portion 7A is returned to the original state in contact with the rear surface of the flat plate portion 8A of the cover plate 8, and the dome-shaped central portion is separated from the central fixed contact 2. The corresponding terminals 4 are switched off.

  Next, a mounting state in an electronic device on which a conventional push-on switch is mounted will be described with reference to FIGS.

  FIG. 12 is a diagram for explaining a conventional push-on switch mounting method. In this figure, 31 is a circuit board having a plurality of lands 32 arranged at predetermined positions on the upper surface, and the main body of the switch case 1 at the end. A U-shaped notch 33 that matches the size of 1A is provided. In addition, a portion that leads from the land 32 to a predetermined circuit portion is not shown.

  From above the circuit board 31, the push-on switch is fitted vertically downward into the notch 33 in a state where the projecting portion 1B is located on the upper side with the operation portion 7B facing forward. Then, the lower surface of the projecting portion 1B is mounted on the circuit board 31 in contact. At this time, the lower surface of the terminal 4 provided in the projecting portion 1B is positioned on the corresponding land 32, and in this state, the terminal 4 and the land 32 are soldered to mount the push-on switch.

  FIG. 13 is a cross-sectional view of a main part in a state where the push-on switch is mounted on the electronic device. In the figure, reference numeral 51 denotes a casing of an electronic device, and an operation button 52 is arranged so as to be movable in a direction perpendicular to the inclined surface. The rear surface of the operation button 52 is formed in a plane parallel to the vertical direction. On the other hand, the surface of the circuit board 31 on which the push-on switch is mounted is a horizontal direction, and the operation direction of the operation unit 7B in the push-on switch is also a horizontal direction. It is mounted in contact.

  When the operation button 52 is pressed, the operation part 7B of the push-on switch is pushed horizontally and the switch is turned on. As a result, a predetermined function of the electronic device works, and when the press is released, the operation of the push-on switch described above is described. Thus, the switch is turned off, and the operation button 52 is pushed back to the original position by the elastic return force of the movable contact 5.

  As prior art document information related to the invention of this application, for example, Patent Document 1 and Patent Document 2 are known.

JP 2001-210176 A Japanese Patent Laid-Open No. 11-53980

  However, in the conventional push-on switch, since the operation direction of the operation button 52 of the electronic device is inclined with respect to the operation direction of the push-on switch when the mounting state shown in FIG. The movement distance of the operation body 7 of the push-on switch is small with respect to the movement distance, and sliding occurs between the rear surface of the operation button 52 and the front surface of the operation portion 7B, and the moderation accompanying the behavior of the movable contact 5 of the push-on switch There was a problem that the feeling became dull and it was difficult to obtain a smooth and light operation feeling.

  The present invention solves such a conventional problem, and even if the operation direction of the operation button of the electronic device is inclined with respect to the circuit board surface on which the switch is mounted, the operation direction of the switch is changed to the operation button. An object of the present invention is to provide a push-on switch that can be adjusted to the operation direction of the device and can provide a smooth and light operation feeling.

  In order to achieve the above object, the present invention has the following configuration.

  According to a first aspect of the present invention, there is provided a switch case made of an insulating resin having a main body portion in which a fixed contact is fixed to the bottom surface of the concave portion of the front opening, and a protruding portion protruding rearward at the upper portion of the main body portion. A movable contact that is disposed in the recess and is brought into and out of contact with the fixed contact by pressing, an operating body that is disposed so as to be able to press the movable contact, and is attached to the switch case while holding the operating body. A push-on switch provided with a cover plate and a terminal connected to the fixed contact and disposed on the projecting portion of the switch case, the cover plate comprising a flat plate portion for holding the operation body on a rear surface; The flat part is provided with legs provided on both sides so as to extend rearward along both opposing side surfaces of the switch case, and the lower ends of these legs are provided in the switch operating direction. Go backwards against It is formed in a shape inclined at a predetermined angle that rises upward, and when mounted on the circuit board, its lower end is placed on the circuit board so that the operating direction of the switch is the circuit. The push-on switch is characterized in that it is mounted in an inclined state with respect to the board surface, and the operation direction of the operation button of the electronic device to be mounted is on the circuit board surface on which the switch is mounted. Even if it is inclined, the switch operation direction can be matched with the operation direction of the operation button by setting the inclination angle of the lower end of the leg portion of the cover plate to a predetermined angle. Thus, it is possible to provide a push-on switch that can provide a light operation feeling.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the lower end of the leg portion of the cover plate is subjected to a solderable process, and the switch is mounted on the circuit board. It has the effect | action that it can mount firmly.

  According to a third aspect of the present invention, in the first aspect of the invention, the auxiliary terminal extends from the lower end portion of the leg portion of the cover plate in a direction orthogonal to the lower end portion. Therefore, the positioning of the switch on the circuit board can be easily performed, and the soldering strength can be increased.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, the side surface of the switch case is defined as a folding line at a position parallel to the lower end position of the leg and slightly higher than the lower end, The bent portion is bent toward the direction away from the lower surface, and the lower surface of the bent portion has a surface at the same height as the lower end portion. 2. The switch is mounted so that the operation direction of the switch is inclined with respect to the circuit board surface by placing the lower surface of the circuit board in contact with the circuit board. In addition to the operation according to the described invention, the bent portion is provided in the leg portion of the cover plate, so that it can be stably placed on the circuit board to be mounted.

  As described above, according to the present invention, even if the operation direction of the operation button of the electronic device is inclined with respect to the circuit board surface on which the switch is mounted, the operation direction of the switch can be changed only by changing the cover plate. Therefore, it is possible to realize a push-on switch that can be adjusted to the operation direction of the first and second and can realize a smooth and light operation feeling.

1 is an external view of a push-on switch according to an embodiment of the present invention. Exploded perspective view Diagram explaining how to install the push-on switch Cross-sectional view of relevant parts with the push-on switch mounted on an electronic device Cross-sectional view of the main part in a state where the push-on switch is mounted on the electronic device when the inclination angle of the lower end of the cover plate leg is different The figure explaining the mounting method of the push-on switch which made the cover board another form External view of push-on switch with different cover plate External view of conventional push-on switch Exploded perspective view Cross-sectional side view Side sectional view of the pressing operation Diagram explaining how to install the push-on switch Cross-sectional view of relevant parts with the push-on switch mounted on an electronic device

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the part of the structure same as the structure demonstrated in the term of the prior art, and detailed description is simplified.

(Embodiment)
FIG. 1 is an external view of a push-on switch according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the push-on switch, and 1 is a central fixed contact 2 and an outer fixed contact on the inner bottom surface of a recess in a front opening. 3 is a switch case made of an insulating resin having a main body 1A having 3 and a projecting portion 1B projecting rearward at the upper part of the main body 1A, and connected to the central fixed contact 2 and the outer fixed contact 3, respectively. Terminals 4 are provided along the lower surface and the rear surface of the protruding portion 1B. Each of the fixed contacts 2 and 3 and the terminal 4 are insert-molded with an insulating resin and fixed to the switch case 1. A circular dome-shaped movable contact 5 is accommodated in the concave portion of the switch case 1, and an insulating sheet 6 closes the concave portion from the front to hold the movable contact 5 and adheres.

  Then, the operation plate 7B of the operation body 7 disposed in front of the insulating sheet 6 is projected forward from the middle hole, and the cover plate 21 in which the rear surface of the flat plate portion 21A is in contact with the front surface of the flange portion 7A has four locations. The locking portion 21B provided at the corner is locked and fixed to the locking protrusion 1C of the switch case 1. The above is the same as the conventional one.

  The push-on switch according to the present embodiment is characterized by a cover plate 21 that is arranged on the front surface of the switch case 1 and is locked and fixed, and leg portions 21C extend from opposite side ends of the flat plate portion 21A. The leg portions 21 </ b> C extend rearward along the side surface of the switch case 1. The lower end portion 21D, which is a part of the outer shape of the leg portion 21C, is formed in a linearly inclined shape that rises toward the distal end side, ie, the rear side of the switch, in the extending direction of the leg portion 21C. . The inclined front portion height position is formed to be located below the lower surface of the projecting portion 1B. The lower end portion 21D is subjected to a solderable surface treatment such as solder plating or silver plating. In addition, the surface treatment which can be soldered not only to lower end part 21D but to the surrounding part or the cover plate 21 whole may be made.

  The inclination angle of the lower end portion 21D is set so as to match the angle of the operation direction of the operation button 54 provided on the inclined surface of the electronic device casing 51 when mounted on the surface of the circuit board 36 described later. ing.

  Since the operation of the push-on switch of the present embodiment configured as described above is the same as the conventional one, the description thereof will be omitted, and the mounting state on the electronic device on which the push-on switch is mounted next will be described. This will be described with reference to the drawings.

  FIG. 3 is a view for explaining a method of mounting the push-on switch according to the present embodiment. 36 is a circuit board having a predetermined land 37 on the upper surface, and a U-shaped notch 38 is provided at the end thereof. It has been. Note that portions other than the land 37 are not shown.

  From above the circuit board 36, the main body 1A is fitted into the notch 38 with the push-on switch facing the operation part 7B forward and the protruding part 1B positioned on the upper side, The lower end portion 21D formed linearly of the leg 21C of the plate 21 and the projecting portion 1B of the switch case 1 are mounted in an oblique state in contact with the upper surface of the circuit board 36. In this mounted state, the lower end portion 21D of the leg portion 21C along both sides of the switch case 1 and the lower surface of the terminal 4 provided on the projecting portion 1B are positioned on the corresponding lands 37, and push-on The switch is installed in a state where the operation direction of the switch is inclined at a predetermined angle with respect to the surface of the circuit board 36. The depth dimension of the notch 38 is set to a dimension in which the rear surface of the main body 1 </ b> A of the switch case 1 contacts the upper end of the rear wall of the notch 38 in the mounted state.

  Then, the push-on switch is mounted by soldering between the land 37 corresponding to the lower end 21D and the terminal 4.

  As can be understood from the above description, in the mounting state described above, the switch case 1 portion that is positioned below the lower end portion 21D of the leg portion 21C of the cover plate 21 fits into the notch portion 38 provided in the circuit board 36. Therefore, the height from the surface of the circuit board 36 to the upper end of the push-on switch can be suppressed, and an effect of being mounted with a low profile can be obtained.

  FIG. 4 is a cross-sectional view of the main part in a state where the push-on switch is mounted on an electronic device. In FIG. 4, 51 is a housing of the electronic device, which is operated so as to be movable in a direction perpendicular to the inclined surface. A button 54 is arranged. The circuit board 36 is disposed in a horizontal state inside the casing 51, and the push-on switch is mounted on the circuit board 36 as described above. The push-on switch is mounted at a predetermined inclination angle in which the operation direction of the switch is matched to the operation direction of the operation button 54, and the front surface of the operation unit 7 </ b> B is in contact with the rear surface of the operation button 54. The rear surface of the operation button 54 is formed on a surface orthogonal to the operation direction of the operation button 54. As described above, the operation direction of the switch and the operation direction of the operation button 54 are matched, and the center axis thereof is also matched.

  In the push-on switch of this embodiment mounted in this way, when the operation button 54 of the electronic device is pressed, the pressing force is applied to the operation unit 7B in the same direction as the operation direction of the push-on switch. A smooth and light operation feeling can be obtained without pressure loss.

  As described above, the push-on switch according to the present embodiment operates the push-on switch when the lower end portion 21D of the leg portion 21C of the cover plate 21 is mounted on the circuit board 36. Since the direction matches the operation direction of the operation button 54 and the center axis thereof also coincides, the pressing force applied when the operation button 54 is pressed is directly and linearly transmitted to the operation part 7B of the push-on switch. For this reason, it can be provided as a push-on switch with no loss of transmitted force and a smooth and light operation feeling.

  In this configuration, since it is only necessary to incline the inclination angle of the lower end portion 21D of the cover plate 21 leg portion 21C to a desired angle with respect to the desired switch operation direction, the mounted electronic By changing only the cover plate 21 according to the inclined surface of the casing 51 of the device, it can be handled easily and at a reduced cost.

  For example, as shown in FIG. 5, the operation direction of the push-on switch with respect to the surface of the circuit board 39 can be easily set to an angle different from that described above.

  FIG. 5 shows that the angle of the inclined surface provided with the operation button 54 in the housing 53 of the electronic device is different from that described above, and the operation direction of the push-on switch is the angle shown in FIG. The thing of the form mounted at a still larger angle is shown. For the operation button 54 provided on such an inclined surface, only the inclination angle of the lower end portion 25D of the cover plate 25 leg 25C corresponds to the operation direction of the operation button 54 and the switch operation. The direction can be matched.

  Next, a push-on switch having a cover plate in another form will be described with reference to the mounting method of FIG.

  As shown in the drawing, the cover plate 22 in which the operating body 7 is held by the flat plate portion 22A and is locked and fixed to the locking projection 1C of the switch case 1 by the locking portion 22B is the above-described structure. Auxiliary terminal 22E is different from the form, in the direction perpendicular to the lower end 22D from the middle position of the lower end 22D of the predetermined length of the leg 22C, that is, in the direction perpendicular to the surface of the mounted circuit board 41. Is assumed to be extended.

  The circuit board 41 to which the push-on switch is mounted has a notch 43 at the end, and a land 42 is provided on the upper surface at a position corresponding to the terminal 4 and the lower end 22D of the push-on switch. Further, a through hole 44 is integrally provided in the land 42 for the lower end 22D so that the auxiliary terminal 22E can be inserted.

  The auxiliary terminal 22E is inserted into the through hole 44 while fitting the lower portion of the switch case 1 in accordance with the notch 43 of the circuit board 41, and the lower end 22D is mounted so as to contact the upper surface of the circuit board 41. . In this state, the lower surface of the terminal 4 of the projecting portion 1B of the switch case 1 is positioned on the corresponding land 42, and the rear surface of the switch case 1 is in contact with the upper end of the rear wall of the notch 43 as described above. The same. Thereafter, the lower end 22D, the auxiliary terminal 22E, and the terminal 4 are soldered to mount the push-on switch on the circuit board 41.

  According to this embodiment, the auxiliary terminal 22E of the cover plate 22 makes it easy to position the push-on switch on the circuit board 41, and the push-on switch may be misaligned between mounting and soldering. There is no risk of falling from the substrate 41, and the push-on switch can be firmly soldered.

  Further, another form of the push-on switch provided with a cover plate of another configuration will be described below with reference to the external view of FIG.

  As shown in the figure, the cover plate 23 in which the operating body 7 is held by the flat plate portion 23A and is locked and fixed to the locking projection 1C of the switch case 1 by the locking portion 23B as shown in FIG. It is different from the form. That is, in the leg portion 23C provided rearward along the side surface of the switch case 1, the folding line is defined as a folding line at a position slightly parallel to the position of the lower end portion 22D and slightly higher than the lower end portion 22D. Is bent in a direction perpendicular to the surface of the leg 23C and away from the side surface of the switch case 1, and the lower surface of the bent curve is an inclined surface at the same height as the lower end 22D. In addition, the configuration has a flat plate-like bent portion 23D. It is assumed that at least the lower surface of the bent portion 23D is subjected to a solderable surface treatment.

  Note that the inclination angle that rises toward the switch rear side of the bent portion 23D is similar to that of the above-described configuration when the push-on switch is mounted on a circuit board of an electronic device (not shown). The angle is set so that the operation direction matches the operation direction of the switch.

  With this configuration, the terminal 4 provided on the projecting portion 1B of the switch case 1 and the bent portion 23D of the cover plate 23 leg portion 23C are soldered and mounted on a predetermined land provided on the circuit board. .

  Also in this embodiment, the operation direction of the switch can be matched with the operation direction of the operation button 54 provided on the inclined surface of the electronic device, so that a smooth and light operation feeling can be obtained, and the leg 23C of the cover plate 23 can be obtained. Since the flat plate-like portion formed in the bent portion 23D has a predetermined area, the switch can be stably placed when mounted on the circuit board, and the soldering area can be increased. , Soldering strength can be increased.

  As can be understood from the above description, the present invention includes various forms, but the configuration of the switch contact portion and the shape of the operating body are not limited to those described above. Further, the cover plate is not limited to the above-described components other than the leg portions.

  The push-on switch according to the present invention can provide a smooth and light operation feeling even when the operation direction of the operation button of the electronic device is inclined with respect to the circuit board surface on which the switch is mounted. This is useful when configuring an input operation unit of an electronic device.

DESCRIPTION OF SYMBOLS 1 Switch case 1A Main body part 1B Projection part 1C Locking protrusion 2 Center fixed contact 3 Outer fixed contact 4 Terminal 5 Movable contact 6 Insulation sheet 7 Operation body 7A Flange part 7B Operation part 21,22,23,25 Cover plate 21A, 22A, 23A Flat plate portion 21B, 22B, 23B Locking portion 21C, 22C, 23C, 25C Leg portion 21D, 22D, 25D Lower end portion 22E Auxiliary terminal 23D Bending portion 36, 39, 41 Circuit board 37, 42 Land 38, 43 Notch 44 Through-hole 51, 53 Case 54 Operation button

Claims (4)

A switch case made of an insulating resin having a main body portion with a fixed contact fixed to the bottom surface of the concave portion of the front opening and a projecting portion protruding rearward at the upper portion of the main body portion, and fixed by pressing in the concave portion. A movable contact contacting and separating from the contact; an operating body arranged to be able to press the movable contact; a cover plate holding the operating body and attached to the switch case; and connecting to the fixed contact A push-on switch including a terminal disposed on a projecting portion of the switch case, wherein the cover plate includes a flat plate portion that holds the operating body on a rear surface, and both side surfaces of the switch case that face each other from the flat plate portion. Legs are provided on both sides to extend rearward along each side, and these legs are at a predetermined angle where the lower end rises as it goes rearward with respect to the switch operating direction. Lean on When the switch is mounted on the circuit board, its lower end is placed on the circuit board so that the switch operating direction is inclined with respect to the circuit board surface. A push-on switch, characterized in that 2. The push-on switch according to claim 1, wherein the lower end portion of the leg portion of the cover plate is subjected to a solderable process. 2. The push-on switch according to claim 1, wherein an auxiliary terminal extends from a lower end portion of the leg portion of the cover plate in a direction orthogonal to the lower end portion. A bending line is formed at a position parallel to the lower end position of the leg and slightly higher than the lower end, and the lower surface is bent toward the direction away from the side surface of the switch case. It is assumed that it has a bent portion that is a surface at the same height as the portion, and when the lower surface of the bent portion is mounted on the circuit board when mounted on the circuit board, 2. The push-on switch according to claim 1, wherein the switch is mounted in an inclined direction with respect to the circuit board surface.

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