WO2020105339A1 - Push switch - Google Patents

Push switch

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Publication number
WO2020105339A1
WO2020105339A1 PCT/JP2019/041341 JP2019041341W WO2020105339A1 WO 2020105339 A1 WO2020105339 A1 WO 2020105339A1 JP 2019041341 W JP2019041341 W JP 2019041341W WO 2020105339 A1 WO2020105339 A1 WO 2020105339A1
Authority
WO
WIPO (PCT)
Prior art keywords
push switch
contact member
movable contact
metal
stroke
Prior art date
Application number
PCT/JP2019/041341
Other languages
French (fr)
Japanese (ja)
Inventor
晃 金子
俊彦 田澤
克敏 舂井
Original Assignee
アルプスアルパイン株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by アルプスアルパイン株式会社 filed Critical アルプスアルパイン株式会社
Priority to JP2020558175A priority Critical patent/JP7183298B2/en
Publication of WO2020105339A1 publication Critical patent/WO2020105339A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
    • H01H13/48—Snap-action arrangements depending upon deformation of elastic members using buckling of disc springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
    • H01H13/52—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state immediately upon removal of operating force, e.g. bell-push switch

Definitions

  • the present invention relates to a push switch.
  • the operation stroke amount in the stroke operation region is the operation stroke amount obtained by adding the elastic deformation amount of the rubber stem to the operation stroke amount of the movable contact member. Therefore, there is a limit when it is desired to shorten the stroke (main stroke) for causing the movable contact member to perform the reversing operation.
  • the purpose is to provide a push switch that can easily realize a short stroke.
  • a push switch includes a housing having an opening, a housing communicating with the opening, a fixed contact member attached to the housing, and disposed inside the housing.
  • a movable contact member having a dome portion that is arranged inside the storage portion closer to the opening than the fixed contact member, protrudes in a dome shape toward the opening, and is movable in a reverse direction;
  • a plate spring that is provided on the side opposite to the fixed contact member and that is elastically deformable in the reversing direction of the movable contact member, and that projects from the opening and that connects the movable contact member to the fixed contact through the plate spring.
  • a pressing member made of a hard material that can be pressed to the member side is included.
  • FIG. 3 is a perspective view showing push switch 100 of the first embodiment. 3 is an exploded view of the push switch 100.
  • FIG. It is a figure which shows metal plates 120A and 120B.
  • 6 is a diagram showing an FS characteristic of the push switch 100.
  • FIG. 6 is a diagram showing an FS characteristic of the push switch 100.
  • FIG. 6 is a diagram showing an FS characteristic of the push switch 100.
  • FIG. 6 is a diagram showing an FS characteristic of the push switch 100.
  • FIG. 6 is a diagram showing an FS characteristic of the push switch 100.
  • FIG. 6 is a diagram showing an FS characteristic of the push switch 100.
  • FIG. It is a figure which shows the frequency distribution of the level of the operation sound when turning on / off the push switch 100. It is a figure which shows the frequency distribution of the level of the operation sound when turning on / off the push switch 100.
  • FIG. 1 is a perspective view showing a push switch 100 according to the first embodiment.
  • FIG. 2 is an exploded view of the push switch 100.
  • the XYZ coordinate system will be defined and described below. Further, in the following, for convenience of description, the Z-axis negative direction side is referred to as the lower side or the lower side, and the Z-axis positive direction side is referred to as the upper side or the upper side, but they do not represent a general vertical relationship.
  • the push switch 100 includes a housing 110, metal plates 120A and 120B, a metal contact 130A, leaf springs 130B and 130C, a metal spring 140, a pressing member 150, and a frame 160.
  • the metal plates 120A and 120B will be described below with reference to FIG.
  • FIG. 3 is a diagram showing the metal plates 120A and 120B.
  • the push switch 100 is switched between ON (conduction state) and OFF (non-conduction state) by changing the electrical conduction state between the metal plate 120A and the metal plate 120B by the metal contact 130A.
  • the metal contact 130A is in contact with the metal plate 120B (peripheral fixed contact 121B), but is not in contact with the metal plate 120A (central fixed contact 121A). .. That is, the metal plate 120A and the metal plate 120B are not electrically connected, and the push switch 100 is off (non-conductive state).
  • the push switch 100 starts pressing the pressing member 150 downward from the initial position (see FIG. 1) where the pressing member 150 is not pressed downward, only the metal spring 140 elastically deforms first and the leaf spring 130B and 130C and the metal contact 130A enter the operation region where they are not elastically deformed.
  • the downward stroke (displacement) of the pressing member 150 in this operation region is referred to as a prestroke.
  • the metal contact 130A does not perform the reversing operation and does not contact the metal plate 120A, so the push switch 100 is off (non-conducting state).
  • the push switch 100 makes a transition from the prestroke operation region to the main stroke operation state.
  • the central portion of the metal spring 140 presses the central portions of the leaf springs 130C and 130B downward, and the central portions of the leaf springs 130C and 130B contact the metal contact 130A. Press the center of the downward. Then, when the leaf springs 130C and 130B and the metal contact 130A perform a reversing operation, the metal contact 130A contacts the metal plate 120A, and the metal plate 120A and the metal plate 120B are electrically connected via the metal contact 130A. Then, the push switch 100 is turned on (conductive state).
  • the elastic deformation amount of the elastic member for the prestroke (metal spring 140) in the operation area of the main stroke can be reduced. It is possible to achieve a shorter stroke in the operation region of the main stroke than when using a member (stem).
  • the housing 110 is made of resin and holds the metal plates 120A and 120B.
  • the housing 110 and the metal plates 120A and 120B are integrally manufactured by insert molding.
  • the housing 110 has an opening 111 and a storage portion 112 that communicates with the opening 111.
  • the opening 111 is formed on the surface on the Z axis positive direction side.
  • the storage portion 112 is formed downward from the opening.
  • the opening portion 111 and the storage portion 112 have a rectangular shape in which four corners (four corner portions) are chamfered in a plan view, and the length in the X axis direction and the length in the Y axis direction are substantially equal. That is, here, the opening portion 111 and the storage portion 112 are square in a plan view.
  • the central fixed contact 121A of the metal plate 120A and the peripheral fixed contact 121B of the metal plate 120B are arranged on the bottom of the storage section 112 and are exposed in the storage section 112. Inside the storage part 112, the metal contact 130A and the leaf springs 130B and 130C are arranged in this order on the upper side of the central fixed contact 121A and the peripheral fixed contact 121B (see FIG. 2), and the metal spring 140 and the pressing force are further applied thereto.
  • the member 150 is overlaid.
  • the metal spring 140 is housed in the housing portion 112, and the projecting portion 152 of the pressing member 150 projects upward from the opening portion 111 (see FIG. 1).
  • the metal plate 120A has a central fixed contact 121A and a terminal 122A.
  • the metal plate 120A is made of copper, for example.
  • the central fixed contact 121A is exposed at the central portion of the bottom of the storage section 112, and when the pressing member 150 is not pressed downward, it does not contact the metal contact 130A and the pressing member 150 moves downward.
  • the metal contact 130A is pressed in the direction and performs a reversing operation, the metal contact 130A contacts the metal contact 130A.
  • the terminal 122A projects toward the negative side of the housing 110 in the X-axis direction.
  • the metal plate 120B has a peripheral fixed contact 121B and a terminal 122B.
  • the metal plate 120B is made of copper, for example.
  • the peripheral fixed contact 121B is exposed on the peripheral edge of the bottom of the storage part 112, and in the state where the pressing member 150 is not pressed downward (see FIG. 1), the metal contact 130A is in the X-axis direction.
  • the end portions on both sides are in contact with the end portions on both sides in the Y-axis direction, and even when the pressing member 150 is pressed downward, the metal contact 130A is also contacted.
  • the terminal 122B projects to the X axis positive direction side of the housing 110.
  • the metal contact 130A is a metal spring made of a metal member, and has a base 131A and a dome portion 132A protruding upward in a dome shape and capable of reversing operation (see FIG. 2).
  • the base 131A has a rectangular shape that matches the shapes and sizes of the opening 111 and the storage 112 in a plan view, and is located around the dome portion 132A.
  • the base 131A is in contact with the peripheral fixed contact 121B.
  • the shape of the base 131A is not a rectangular shape as described above, but may be, for example, a shape that is independently extended in a leg shape from the outer peripheral portion of the dome portion 132A toward the four corners of the storage portion 112. Good.
  • the dome portion 132A is located in the central portion of the base 131A, and is capable of reversing from a state of being convex upward to a state of being convex downward with respect to the base 131A. That is, the reversing operation direction of the dome portion 132A is the direction in which the direction in which the dome portion 132A is convex changes, and the direction in which the dome portion 132A is convex is changed from the convex state to the downward side.
  • the metal contact 130A is an example of a movable contact member.
  • the metal contact 130A is made of stainless steel, for example.
  • the metal contact 130A is arranged such that the top of the dome portion 132A is located above the central fixed contact 121A and the base 131A is in contact with the peripheral fixed contact 121B. Therefore, in the dome portion 132A, when the dome portion 132A is pressed from the upper side to invert and convex downward, the inverted dome portion 132A contacts the central fixed contact 121A, and the metal contact 130A becomes the central fixed contact 121A.
  • the peripheral fixed contact 121B is made conductive.
  • the metal contact 130A has a lower surface plated with silver. This is because the lower surface comes into contact with the central fixed contact 121A and the peripheral fixed contact 121B through which current flows. In addition, the operation feeling can be given to the operator by inverting the dome portion 132A.
  • Such a metal contact 130A is produced by forming a dome portion 132A by punching on a sheet metal formed into a substantially rectangular shape in plan view.
  • the leaf spring 130B has a configuration in which silver plating is removed from the metal contact 130A. Therefore, the leaf spring 130B has a base portion 131B and a dome portion 132B. The leaf spring 130B is arranged so as to overlap the metal contact 130A.
  • the leaf spring 130C has the same configuration as the leaf spring 130B, it has a base portion 131C and a dome portion 132C.
  • the leaf spring 130C is arranged so as to overlap the leaf spring 130B.
  • the metal spring 140 is a metal leaf spring having four leg portions 141 and a central portion 142.
  • the central portion 142 is located at the center of the four leg portions 141 and is a circular flat plate portion in plan view.
  • the four leg portions 141 extend outward from the central portion 142 at equal intervals (intervals of 90 degrees) in a plan view and obliquely downward from the central portion 142 in a side view. ..
  • the metal spring 140 as described above is manufactured by forming the leg portions 141 by punching a sheet metal cut into a substantially cross shape. Moreover, since each leg part 141 extends toward the four corners of the storage part 112, the leg part 141 can be lengthened.
  • Each leg 141 has a bent portion 141A.
  • the leg portion 141 has a shape that extends obliquely downward from the central portion 142 toward the bent portion 141A, is bent at the bent portion 141A, and extends obliquely upward toward the tip.
  • the height of the leg portion 141 (the length in the Z-axis direction from the bent portion 141A to the root connected to the central portion 142) is the height of the dome portion 132C of the leaf spring 130C (the top of the dome portion 132C with respect to the base portion 131C). Height) is set higher than. Further, the positions of the four bent portions 141A are outside the dome portion 132C of the leaf spring 130C in plan view.
  • the four bent portions 141A have the base portion 131C. It has such a shape that it contacts the upper surfaces of the four corners, a gap is formed between the central portion 142 and the dome portion 132C, and a gap is formed between the leg portion 141 and the dome portion 132C.
  • the bent portions 141A of the four leg portions 141 of the metal springs 140 respectively contact the upper surfaces of the four corners of the base portion 131C of the leaf springs 130C.
  • the central portion 142 is separated from the dome portion 132C of the leaf spring 130C.
  • the metal spring 140 elastically deforms so that the leg portions 141 are spread outward from the central portion 142, so that the central portion is the dome portion of the leaf spring 130C. It approaches 132C.
  • the metal spring 140 is elastically deformed, and the operation until the portion of the leg 141 closer to the central portion 142 than the bent portion 141A or the central portion 142 comes into contact with the dome portion 132C of the leaf spring 130C.
  • the area becomes the operation area of the prestroke.
  • the metal spring 140 When the metal spring 140 is further pressed downward by the pressing member 150, the metal spring 140 transitions to the operation region of the main stroke in which the dome portion 132C of the leaf spring 130C is pressed downward.
  • the pressing member 150 has a base 151 and a protrusion 152, and the base 151 and the lower end side of the protrusion 152 are housed in the housing 112.
  • the base 151 is a disk-shaped portion provided around the lower end of the truncated cone-shaped protrusion 152, and the protrusion 152 protrudes from the upper surface of the central portion of the base 151.
  • the pressing member 150 is a so-called stem.
  • the pressing member 150 is made of a hard material, and is made of, for example, a synthetic resin, a metal, a ceramic, or the like that hardly causes elastic deformation. That is, the hard material is a synthetic resin, a metal, a ceramic, or the like that hardly elastically deforms, and ideally a material having no elasticity. In the push switch 100, in order to suppress an increase in stroke due to elastic deformation of the pressing member 150 in the operation region of the main stroke, the pressing member 150 is made of a hard material that hardly elastically deforms.
  • the frame 160 has a base 161 and legs 162.
  • the base 161 has a rectangular shape in a plan view and has an opening 161A.
  • the base 161 is arranged so as to overlap the upper surface of the housing 110, and the opening 161A has an opening diameter that allows the protrusion 152 of the pressing member 150 to be inserted therethrough.
  • Two leg portions 162 are provided on each side of the base portion 161 in the Y-axis direction.
  • the leg portions 162 project in the Z-axis negative direction, and the tips are bent in the X-axis direction and inward in a plan view. It has 162A.
  • Each leg 162 is in close contact with the side surface of the housing 110, and the engagement portion 162A is engaged with a protrusion on the side surface of the housing 110.
  • the metal contact 130A, the leaf springs 130B and 130C, and the metal spring 140 shown in FIG. 2 are housed in the housing portion 112 of the housing 110, and the pressing member 150 is arranged on the metal spring 140.
  • the push switch 100 is completed as shown in FIG.
  • engaging portions that engage with the recesses on the side surface of the housing 110 may be provided on both sides of the base 161 in the X-axis direction.
  • the push switch 100 having the above-described configuration can be used as a switch for various operation systems in a vehicle cabin, for example.
  • the protrusion 152 of the pressing member 150 may be covered with a thin resin sheet or the like.
  • the push switch 100 is pressed more than the initial position shown in FIG.
  • the member 150 may be attached with the member 150 pushed slightly downward. In such a case, the pressing member 150 may be attached while being pressed downward within the range of the prestroke.
  • the pressing member 150 may be attached in a downwardly pressed state as described above to absorb individual differences of the push switch 100.
  • FIGS 4A to 4F are diagrams showing FS (Force-Stroke) characteristics of the push switch 100.
  • the horizontal axis is the stroke (S) for pushing the pressing member 150 downward, and the vertical axis is the force (F) required for pushing the pressing member 150 downward.
  • Force (F) is the operating load.
  • FIG. 4A shows the FS characteristics of only the metal spring 140 and the pressing member 150
  • FIG. 4B shows the FS characteristics of only the metal contact 130A and the leaf springs 130B and 130C
  • FIG. 4C shows the FS of the entire push switch 100. Show the characteristics.
  • FIG. 4D shows the FS characteristics of the pressing member alone of the comparison push switch
  • FIG. 4E shows the FS characteristics of only the metal contact 130A and the leaf springs 130B and 130C
  • FIG. 4F shows the comparison push switch.
  • the FS characteristics as a whole are shown.
  • the FS characteristics of FIG. 4B and FIG. 4E are the same.
  • the FS characteristics of only the metal spring 140 and the pressing member 150 show that the operating load rises linearly from the stroke of 0.0 mm to about 0.55 mm and reaches the stroke of about 0.55 mm. Then, even if the operating load was increased further, the stroke showed a characteristic of being substantially constant. Since the pressing member 150 is made of a hard material that hardly elastically deforms, it can be confirmed that the FS characteristic shown in FIG. 4A is almost the FS characteristic of only the metal spring 140. Furthermore, it was confirmed that when the metal spring 140 comes into contact with a rigid body that prevents its elastic deformation, the operation stroke does not increase any further.
  • the FS characteristic of only the metal contact 130A and the leaf springs 130B and 130C is that the operating load is substantially zero until the stroke reaches about 0.35 mm, and the stroke is about 0.47 mm. It was shown that the operation load reached a peak, the stroke had a minimum value at a stroke of about 0.6 mm, and the stroke could not be further pressed at a stroke of about 0.6 mm. This means that the metal contact 130A and the dome portions 132A, 132B, 132C of the leaf springs 130B, 130C start to reverse at a stroke of about 0.47 mm, and become completely reversed at a stroke of about 0.6 mm. It is shown that.
  • the completely inverted state is a state in which the push switch 100 is turned on. From FIG. 4B, it was also confirmed that when the metal contact 130A and the leaf springs 130B and 130C contact the rigid body that prevents the elastic deformation, the operation stroke does not increase any more.
  • FIG. 4C is an FS characteristic of the entire push switch 100. A characteristic obtained by combining the FS characteristics of FIG. 4A and FIG. 4B so that the metal contact 130A starts to press the leaf spring 130C at a stroke of about 0.34 mm. It has become. The prestroke ends and the main stroke begins about 0.34 mm, and the main stroke completes about 0.59 mm.
  • the stroke required to be turned on in the operation area of the main stroke can be set to 0.25 mm, and a short stroke can be realized. This is because the pressing member 150 hardly elastically deformed in the operation region of the main stroke.
  • the FS characteristic of only the pressing member made of a material other than a hard material and elastically deformed has an operating load from a stroke of about 0.0 mm to about 0.3 mm. After rising up in a non-linear manner, the operating load is slightly reduced until the stroke is about 0.65 mm. When the stroke is about 0.65 mm or more, the operating load sharply increases. However, as compared with FIG. 4A, the manner of increase is gradual. This is because when the stroke is about 0.65 mm, the rigid member comes into contact with the rigid body to temporarily stop the elastic deformation, and then the pressing member is crushed to elastically deform.
  • FIG. 4F shows the FS characteristics of the entire push switch for comparison.
  • the FS characteristics of FIGS. 4D and 4E are combined so that the pressing member contacts the leaf spring 130C at a position where the stroke is about 0.4 mm. It is a characteristic.
  • the stroke required to turn on in the operation area of the main stroke is about 0.33 mm, which is about 30% longer than the push switch 100.
  • the stroke of the push switch for comparison is lengthened because not only the metal contact 130A and the leaf springs 130B and 130C are elastically deformed but also the pressing member is elastically deformed in the operation region of the main stroke. is there. That is, since the pressing member is crushed before the metal contact 130A and the leaf springs 130B and 130C start elastically deforming, the stroke becomes longer.
  • the rising of the operating load immediately after the start of the main stroke in FIG. 4F (immediately after 0.4 mm) is gentler than the rising of the operating load in FIG. 4E because the components of the crushed pressing member are combined. This is because
  • 5A and 5B are diagrams showing frequency distributions of operation sound levels when the push switch 100 is turned on / off.
  • the push switch 100 one having a reduction rate of the minimum value with respect to the maximum value of the FS characteristic of 20% or 30% was prepared. The larger the reduction rate, the stronger the click feeling that the operator obtains when operating the pressing member 150 by hand.
  • the operation sound level of the push switch for comparison including the pressing member that realizes the prestroke by elastically deforming as in the conventional case is also shown.
  • the level of the operation sound when the push switch 100 is turned on is the level of the operation sound generated when the pressing member 150 is pressed downward until the push switch 100 is turned on in the operation region of the main stroke. The same applies to the push switch for comparison.
  • the level of the operation sound when the push switch 100 is turned off means that the push member 100 is opened (typically, the hand pushing the push member 150 is released) and the push member 150 is turned on when the push switch 100 is on. Is the level of the operation sound when is returned to the initial position.
  • the levels of the operation sound when the push switch 100 is turned on are substantially equal for the reduction rate of 20% and 30%, and the comparison push switches are also of substantially the same level. It was
  • the level of the operation sound when turning off the push switch 100 is reduced in both the push switches 100 whose reduction rates are 20% and 30% as compared with the push switch for comparison. It is considered that the reason why the operation sound at the time of turning off is reduced is that the load applied to the metal spring 140 when the pressing member 150 returns to the initial position is distributed to the four legs 141.
  • the operation sound when the push switch 100 is turned on is at the same level as that of the comparison push switch, and the operation sound when the push switch 100 is turned off is the same as that of the comparison push switch. It turned out that it is reduced more than the push switch.
  • the pre-stroke metal spring 140 is provided between the stacked body of the metal contact 130A, the leaf springs 130B and 130C, and the pressing member 150, and the pressing member 150 is hard. It was found that by using a stem made of a material that hardly elastically deforms, the stroke to be turned on in the operation region of the main stroke can be significantly shortened as compared with the push switch for comparison.
  • Such a short stroke can be relatively easily realized by the metal spring 140 for prestroke and the pressing member 150 made of a hard material and hardly elastically deformed.
  • the metal spring 140 realizes the prestroke, and the metal spring 140 is completely crushed in the operation region of the main stroke to be hardly deformed and the pressing member is pressed. Since 150 is made of a hard material that is hardly elastically deformed, it is possible to realize a short stroke relatively easily.
  • the pressing member 150 is hardly elastically deformed, it is possible to operate with a stable stroke for a long period of time.
  • the metal spring 140 since the metal spring 140 has the four leg portions 141, it is possible to increase the operation load in the operation region of the prestroke. Further, since the load due to the operation load is distributed to the four legs 141, it is possible to prolong the service life and reduce the operation noise at the time of turning off.
  • the leg 141 of the metal spring 140 is elastically deformed, but the central portion 142 may be elastically deformed.
  • the central portion 142 may be a dome shape that is convex upward in a non-pressed state, and may have a configuration capable of reversing operation.
  • the leg 141 may be elastically deformable or may not be elastically deformed.
  • the leg portion 141 of the metal spring 140 extends obliquely downward from the central portion 142 in a side view, but the leg portion 141 has the same height as the central portion 142 in the Z-axis direction. It may extend in the horizontal direction (direction of the XY plane). In this case, for example, by providing a spacer between the base 131C of the leaf spring 130C and the leg 141, a gap may be created between the metal spring 140 and the leaf spring 130C in a non-pressed state. Good.
  • the bent portions 141A of the legs 141 of the metal spring 140 contact the upper surfaces of the four corners of the base 131C. Since the metal spring 140 is manufactured by punching a sheet metal by punching processing, the side surface is a punched surface. In this manner, in the configuration in which the bent portion 141A contacts the upper surface of the base 131C, the side surface (punched surface) of the metal spring 140 contacts the upper surface of the base 131C when the metal spring 140 is pressed downward. Therefore, it is possible to suppress the generation of shavings from the side surface (punched surface) along with the operation of the metal spring 140, and it is possible to suppress the occurrence of electrical contact failure due to the shavings.
  • the above has been described. With such a configuration, even if the protruding portion 152 of the pressing member 150 is pressed in an oblique direction, the four leg portions 141 are likely to be uniformly loaded. Further, with such a configuration, the metal spring 140 can be stably arranged between the leaf spring 130C and the pressing member 150.
  • the leg portion 141 may be bent horizontally at the bent portion 141A.
  • the tip end side of the bent portion 141A of the leg portion 141 is separated from the upper surface of the base portion 131C of the leaf spring 130C.
  • Side surface (punched surface) does not contact the upper surface of the base 131C, and it is possible to suppress generation of shavings from the side surface (punched surface) due to the operation of the metal spring 140. The occurrence of electrical contact failure can be suppressed.
  • the leg 141 of the metal spring 140 is bent at the bent portion 141A.
  • the leg 141 is not bent, and the tip of the leg 141 contacts the upper surface of the base 131C of the leaf spring 130C. May be.
  • the tip is also a part of the side surface (punched surface), but in the case where the influence of the generation of shavings hardly occurs, such a configuration may be adopted.
  • the metal spring 140 has four legs 141, but the number of legs 141 may be three, or two if the stability of the operation can be ensured. Good.
  • the shape in which the opening 111 and the accommodating portion 112 are square in a plan view has been described, but it may be a rectangle long in the X-axis direction or the Y-axis direction.
  • the length of the leg portion 141 can be made longer, and a larger amount of prestroke can be taken. Therefore, the operation load can be easily set according to the specifications of the push switch 100.
  • the push switch 100 has been described as including the leaf springs 130B and 130C that are stacked on the metal contact 130A.
  • the leaf springs 130B and 130C are provided to increase the operation load in the operation area of the main stroke. For this reason, when the leaf springs 130B and 130C are unnecessary, the push switch 100 may not include the leaf springs 130B and 130C, may include one spring (only the leaf spring 130B), and may include three or more springs. But it's okay.
  • the bottom surface of the base 151 of the pressing member 150 is flat, but a protrusion may be provided at the center of the bottom surface of the base 151. Providing such a protrusion makes it easier for the pressing member 150 to press the central portion 142 of the metal spring 140.

Abstract

The objective of the present invention is to provide a push switch with which a short stroke can be achieved easily.　This push switch includes: a housing having an opening portion and an accommodating portion communicating with the opening portion; a fixed contact point member which is attached to the housing and which is disposed inside the accommodating portion; a movable contact point member which is disposed closer to the opening portion than the fixed contact point member inside the accommodating portion, and which has a dome portion that projects in a dome shape toward the opening portion and that is capable of performing an inversion action; a leaf spring which is provided on the opposite side of the movable contact point member to the fixed contact point member, and which is capable of deforming elastically in the inversion action direction of the movable contact point member; and a pressing member which is made from a hard material, projects from the opening portion, and is capable of pressing the movable contact point member toward the fixed contact point member by way of the leaf spring.

Description

プッシュスイッチPush switch
　本発明は、プッシュスイッチに関する。 The present invention relates to a push switch.
　従来より、ドーム型の可動接点部材を押圧するために、ラバー製のステムを用いたプッシュスイッチがある。ラバー製のステムが押圧されると、可動接点部材が撓み始める前にラバー製のステムのみが弾性変形して潰される動作領域があり、この動作領域がプリストロークの領域として利用されている（例えば、特許文献１参照）。 Conventionally, there is a push switch that uses a rubber stem to press the dome-shaped movable contact member. When the rubber stem is pressed, there is an operation region in which only the rubber stem is elastically deformed and crushed before the movable contact member starts to bend, and this operation region is used as a prestroke region (for example, , Patent Document 1).
特開２０１１－１１３６５２号公報JP, 2011-113652, A
　ところで、ラバー製のステムがさらに押圧されてプリストロークの動作領域が終わり、可動接点部材が反転動作を開始するメインストロークの動作領域に入っても、ラバー製のステムの弾性変形が生じるので、メインストロークの動作領域における操作ストローク量は、可動接点部材の操作ストローク量にラバー製のステムの弾性変形量を加えたものが操作ストローク量になる。このため、可動接点部材に反転動作を行わせるためのストローク（メインストローク）のショートストローク化を図りたい場合には限界があった。 By the way, even if the rubber stem is further pressed to end the pre-stroke operation area and enters the main stroke operation area where the movable contact member starts the reversing operation, the rubber stem is elastically deformed. The operation stroke amount in the stroke operation region is the operation stroke amount obtained by adding the elastic deformation amount of the rubber stem to the operation stroke amount of the movable contact member. Therefore, there is a limit when it is desired to shorten the stroke (main stroke) for causing the movable contact member to perform the reversing operation.
　そこで、ショートストローク化を容易に実現できるプッシュスイッチを提供することを目的とする。 Therefore, the purpose is to provide a push switch that can easily realize a short stroke.
　本発明の実施の形態のプッシュスイッチは、開口部と、前記開口部に連通する収納部とを有する筐体と、前記筐体に取り付けられ、前記収納部の内部に配置される固定接点部材と、前記収納部の内部で前記固定接点部材よりも前記開口部側に配置され、前記開口部側にドーム状に突出し、反転動作可能なドーム部を有する可動接点部材と、前記可動接点部材に対して前記固定接点部材とは反対側に設けられ、前記可動接点部材の反転動作方向に弾性変形可能な板ばねと、前記開口部から突出し、前記板ばねを介して前記可動接点部材を前記固定接点部材側に押圧可能な硬質材料製の押圧部材とを含む。 A push switch according to an embodiment of the present invention includes a housing having an opening, a housing communicating with the opening, a fixed contact member attached to the housing, and disposed inside the housing. A movable contact member having a dome portion that is arranged inside the storage portion closer to the opening than the fixed contact member, protrudes in a dome shape toward the opening, and is movable in a reverse direction; And a plate spring that is provided on the side opposite to the fixed contact member and that is elastically deformable in the reversing direction of the movable contact member, and that projects from the opening and that connects the movable contact member to the fixed contact through the plate spring. A pressing member made of a hard material that can be pressed to the member side is included.
　ショートストローク化を容易に実現できるプッシュスイッチを提供することができる。 We can provide a push switch that can easily realize a short stroke.
実施の形態１のプッシュスイッチ１００を示す斜視図である。FIG. 3 is a perspective view showing push switch 100 of the first embodiment. プッシュスイッチ１００の分解図である。3 is an exploded view of the push switch 100. FIG. 金属プレート１２０Ａ、１２０Ｂを示す図である。It is a figure which shows metal plates 120A and 120B. プッシュスイッチ１００のＦＳ特性を示す図である。6 is a diagram showing an FS characteristic of the push switch 100. FIG. プッシュスイッチ１００のＦＳ特性を示す図である。6 is a diagram showing an FS characteristic of the push switch 100. FIG. プッシュスイッチ１００のＦＳ特性を示す図である。6 is a diagram showing an FS characteristic of the push switch 100. FIG. プッシュスイッチ１００のＦＳ特性を示す図である。6 is a diagram showing an FS characteristic of the push switch 100. FIG. プッシュスイッチ１００のＦＳ特性を示す図である。6 is a diagram showing an FS characteristic of the push switch 100. FIG. プッシュスイッチ１００のＦＳ特性を示す図である。6 is a diagram showing an FS characteristic of the push switch 100. FIG. プッシュスイッチ１００をオン／オフする際の操作音のレベルの周波数分布を示す図である。It is a figure which shows the frequency distribution of the level of the operation sound when turning on / off the push switch 100. プッシュスイッチ１００をオン／オフする際の操作音のレベルの周波数分布を示す図である。It is a figure which shows the frequency distribution of the level of the operation sound when turning on / off the push switch 100.
　以下、本発明のプッシュスイッチを適用した実施の形態について説明する。 An embodiment to which the push switch of the present invention is applied will be described below.
　＜実施の形態＞
　図１は、実施の形態１のプッシュスイッチ１００を示す斜視図である。図２は、プッシュスイッチ１００の分解図である。以下では、ＸＹＺ座標系を定義して説明する。また、以下では、説明の便宜上、Ｚ軸負方向側を下側又は下、Ｚ軸正方向側を上側又は上と称すが、普遍的な上下関係を表すものではない。 <Embodiment>
FIG. 1 is a perspective view showing a push switch 100 according to the first embodiment. FIG. 2 is an exploded view of the push switch 100. The XYZ coordinate system will be defined and described below. Further, in the following, for convenience of description, the Z-axis negative direction side is referred to as the lower side or the lower side, and the Z-axis positive direction side is referred to as the upper side or the upper side, but they do not represent a general vertical relationship.
　プッシュスイッチ１００は、筐体１１０、金属プレート１２０Ａ、１２０Ｂ、メタルコンタクト１３０Ａ、リーフスプリング１３０Ｂ、１３０Ｃ、メタルスプリング１４０、押圧部材１５０、及びフレーム１６０を含む。以下では、金属プレート１２０Ａ、１２０Ｂについては、単独で示す図３も用いて説明する。図３は、金属プレート１２０Ａ、１２０Ｂを示す図である。 The push switch 100 includes a housing 110, metal plates 120A and 120B, a metal contact 130A, leaf springs 130B and 130C, a metal spring 140, a pressing member 150, and a frame 160. The metal plates 120A and 120B will be described below with reference to FIG. FIG. 3 is a diagram showing the metal plates 120A and 120B.
　プッシュスイッチ１００は、メタルコンタクト１３０Ａによって金属プレート１２０Ａと金属プレート１２０Ｂとの電気的な導通状態が変化することでオン（導通状態）とオフ（非導通状態）とが切り替わる。 The push switch 100 is switched between ON (conduction state) and OFF (non-conduction state) by changing the electrical conduction state between the metal plate 120A and the metal plate 120B by the metal contact 130A.
　プッシュスイッチ１００は、オフ（非導通状態）の時には、メタルコンタクト１３０Ａは金属プレート１２０Ｂ（周辺固定接点１２１Ｂ）には接触しているが、金属プレート１２０Ａ（中央固定接点１２１Ａ）には接触していない。すなわち、金属プレート１２０Ａと金属プレート１２０Ｂとは電気的に接続されておらず、プッシュスイッチ１００はオフ（非導通状態）である。 When the push switch 100 is off (non-conductive state), the metal contact 130A is in contact with the metal plate 120B (peripheral fixed contact 121B), but is not in contact with the metal plate 120A (central fixed contact 121A). .. That is, the metal plate 120A and the metal plate 120B are not electrically connected, and the push switch 100 is off (non-conductive state).
　また、プッシュスイッチ１００は、押圧部材１５０を下方向に押圧していない初期位置（図１参照）から押圧部材１５０を下方向に押圧し始めると、まずメタルスプリング１４０のみが弾性変形し、リーフスプリング１３０Ｂ、１３０Ｃとメタルコンタクト１３０Ａは弾性変形しない動作領域に入る。この動作領域における押圧部材１５０の下方向のストローク（変位）をプリストロークと称す。プリストロークの状態では、メタルコンタクト１３０Ａは反転動作せず、金属プレート１２０Ａに接触していないため、プッシュスイッチ１００はオフ（非導通状態）である。 Further, when the push switch 100 starts pressing the pressing member 150 downward from the initial position (see FIG. 1) where the pressing member 150 is not pressed downward, only the metal spring 140 elastically deforms first and the leaf spring 130B and 130C and the metal contact 130A enter the operation region where they are not elastically deformed. The downward stroke (displacement) of the pressing member 150 in this operation region is referred to as a prestroke. In the pre-stroke state, the metal contact 130A does not perform the reversing operation and does not contact the metal plate 120A, so the push switch 100 is off (non-conducting state).
　また、メタルスプリング１４０の中央部がリーフスプリング１３０Ｃに接触し始めると、プッシュスイッチ１００は、プリストロークの動作領域からメインストロークの動作状態に遷移する。 Further, when the central portion of the metal spring 140 starts to contact the leaf spring 130C, the push switch 100 makes a transition from the prestroke operation region to the main stroke operation state.
　メインストロークの動作領域で押圧部材１５０を下方向に押圧すると、メタルスプリング１４０の中央部がリーフスプリング１３０Ｃ、１３０Ｂの中央部を下方向に押圧し、リーフスプリング１３０Ｃ、１３０Ｂの中央部がメタルコンタクト１３０Ａの中央部を下方向に押圧する。そして、リーフスプリング１３０Ｃ、１３０Ｂとメタルコンタクト１３０Ａとが反転動作を行うと、メタルコンタクト１３０Ａが金属プレート１２０Ａに接触して、金属プレート１２０Ａと金属プレート１２０Ｂとがメタルコンタクト１３０Ａを介して電気的に接続され、プッシュスイッチ１００がオン（導通状態）になる。 When the pressing member 150 is pressed downward in the operation region of the main stroke, the central portion of the metal spring 140 presses the central portions of the leaf springs 130C and 130B downward, and the central portions of the leaf springs 130C and 130B contact the metal contact 130A. Press the center of the downward. Then, when the leaf springs 130C and 130B and the metal contact 130A perform a reversing operation, the metal contact 130A contacts the metal plate 120A, and the metal plate 120A and the metal plate 120B are electrically connected via the metal contact 130A. Then, the push switch 100 is turned on (conductive state).
　プリストロークを実現するためにメタルスプリング１４０を用いると、メインストロークの動作領域におけるプリストローク用の弾性部材（メタルスプリング１４０）の弾性変形量を減らすことができるため、従来のようにラバー製の押圧部材（ステム）を用いる場合よりも、メインストロークの動作領域のショートストローク化を図ることができる。以下、プッシュスイッチ１００の構成の詳細について説明する。 When the metal spring 140 is used to realize the prestroke, the elastic deformation amount of the elastic member for the prestroke (metal spring 140) in the operation area of the main stroke can be reduced. It is possible to achieve a shorter stroke in the operation region of the main stroke than when using a member (stem). Hereinafter, details of the configuration of the push switch 100 will be described.
　筐体１１０は、樹脂製であり、金属プレート１２０Ａ、１２０Ｂを保持する。筐体１１０と金属プレート１２０Ａ、１２０Ｂは、インサート成型によって一体的に作製される。筐体１１０は、開口部１１１と、開口部１１１に連通する収納部１１２とを有する。開口部１１１は、Ｚ軸正方向側の面に形成されている。収納部１１２は、開口部から下側に向かって形成されている。開口部１１１及び収納部１１２は、平面視で四隅（４つの角部）が面取りされた矩形状であり、Ｘ軸方向の長さとＹ軸方向の長さとが略等しい。すなわち、ここでは開口部１１１及び収納部１１２は、平面視で正方形である。 The housing 110 is made of resin and holds the metal plates 120A and 120B. The housing 110 and the metal plates 120A and 120B are integrally manufactured by insert molding. The housing 110 has an opening 111 and a storage portion 112 that communicates with the opening 111. The opening 111 is formed on the surface on the Z axis positive direction side. The storage portion 112 is formed downward from the opening. The opening portion 111 and the storage portion 112 have a rectangular shape in which four corners (four corner portions) are chamfered in a plan view, and the length in the X axis direction and the length in the Y axis direction are substantially equal. That is, here, the opening portion 111 and the storage portion 112 are square in a plan view.
　収納部１１２の底部には金属プレート１２０Ａの中央固定接点１２１Ａと、金属プレート１２０Ｂの周辺固定接点１２１Ｂとが配置され、収納部１１２内に表出している。収納部１１２内では、中央固定接点１２１Ａと周辺固定接点１２１Ｂの上側に、メタルコンタクト１３０Ａとリーフスプリング１３０Ｂ、１３０Ｃがこの順に重ねて配置され（図２参照）、さらにその上にメタルスプリング１４０と押圧部材１５０が重ねられている。メタルスプリング１４０は、収納部１１２に収納され、押圧部材１５０の突出部１５２は開口部１１１から上方向に突出している（図１参照）。 The central fixed contact 121A of the metal plate 120A and the peripheral fixed contact 121B of the metal plate 120B are arranged on the bottom of the storage section 112 and are exposed in the storage section 112. Inside the storage part 112, the metal contact 130A and the leaf springs 130B and 130C are arranged in this order on the upper side of the central fixed contact 121A and the peripheral fixed contact 121B (see FIG. 2), and the metal spring 140 and the pressing force are further applied thereto. The member 150 is overlaid. The metal spring 140 is housed in the housing portion 112, and the projecting portion 152 of the pressing member 150 projects upward from the opening portion 111 (see FIG. 1).
　金属プレート１２０Ａは、図３に示すように、中央固定接点１２１Ａと、端子１２２Ａとを有する。金属プレート１２０Ａは、一例として銅製である。中央固定接点１２１Ａは、収納部１１２の底部の中央部に表出しており、押圧部材１５０が下方向に押圧されていない状態では、メタルコンタクト１３０Ａには接触しておらず、押圧部材１５０が下方向に押圧されてメタルコンタクト１３０Ａが反転動作を行うと、メタルコンタクト１３０Ａに接触する。端子１２２Ａは、筐体１１０のＸ軸負方向側に突出している。 As shown in FIG. 3, the metal plate 120A has a central fixed contact 121A and a terminal 122A. The metal plate 120A is made of copper, for example. The central fixed contact 121A is exposed at the central portion of the bottom of the storage section 112, and when the pressing member 150 is not pressed downward, it does not contact the metal contact 130A and the pressing member 150 moves downward. When the metal contact 130A is pressed in the direction and performs a reversing operation, the metal contact 130A contacts the metal contact 130A. The terminal 122A projects toward the negative side of the housing 110 in the X-axis direction.
　金属プレート１２０Ｂは、周辺固定接点１２１Ｂと、端子１２２Ｂとを有する。金属プレート１２０Ｂは、一例として銅製である。周辺固定接点１２１Ｂは、収納部１１２の底部の周縁部に表出しており、押圧部材１５０が下方向に押圧されていない初期位置にある状態（図１参照）において、メタルコンタクト１３０ＡのＸ軸方向両側の端部と、Ｙ軸方向両側の端部とに接触しており、押圧部材１５０が下方向に押圧された状態においてもメタルコンタクト１３０Ａに接触する。端子１２２Ｂは、筐体１１０のＸ軸正方向側に突出している。 The metal plate 120B has a peripheral fixed contact 121B and a terminal 122B. The metal plate 120B is made of copper, for example. The peripheral fixed contact 121B is exposed on the peripheral edge of the bottom of the storage part 112, and in the state where the pressing member 150 is not pressed downward (see FIG. 1), the metal contact 130A is in the X-axis direction. The end portions on both sides are in contact with the end portions on both sides in the Y-axis direction, and even when the pressing member 150 is pressed downward, the metal contact 130A is also contacted. The terminal 122B projects to the X axis positive direction side of the housing 110.
　メタルコンタクト１３０Ａは、金属部材製の金属ばねであり、基部１３１Ａと、上側にドーム状に突出し反転動作可能なドーム部１３２Ａを有する（図２参照）。 The metal contact 130A is a metal spring made of a metal member, and has a base 131A and a dome portion 132A protruding upward in a dome shape and capable of reversing operation (see FIG. 2).
　基部１３１Ａは、平面視で開口部１１１及び収納部１１２の形状及びサイズに合わせた矩形形状を有し、ドーム部１３２Ａの周囲に位置する。基部１３１Ａは、周辺固定接点１２１Ｂに接触している。なお、基部１３１Ａの形状は、上述のような矩形形状ではなく、例えば、ドーム部１３２Ａの外周部から収納部１１２の四隅方向へ各々独立して脚状に延設されたような形状であってもよい。 The base 131A has a rectangular shape that matches the shapes and sizes of the opening 111 and the storage 112 in a plan view, and is located around the dome portion 132A. The base 131A is in contact with the peripheral fixed contact 121B. The shape of the base 131A is not a rectangular shape as described above, but may be, for example, a shape that is independently extended in a leg shape from the outer peripheral portion of the dome portion 132A toward the four corners of the storage portion 112. Good.
　ドーム部１３２Ａは、基部１３１Ａの中央部に位置し、基部１３１Ａに対して上側に凸の状態から下側に凸の状態に反転動作可能である。すなわち、ドーム部１３２Ａの反転動作方向は、ドーム部１３２Ａが凸となる向きが変化する方向であり、上側に凸の状態から下側に凸の状態に変化する方向である。メタルコンタクト１３０Ａは、可動接点部材の一例である。メタルコンタクト１３０Ａは、一例として、ステンレス製である。 The dome portion 132A is located in the central portion of the base 131A, and is capable of reversing from a state of being convex upward to a state of being convex downward with respect to the base 131A. That is, the reversing operation direction of the dome portion 132A is the direction in which the direction in which the dome portion 132A is convex changes, and the direction in which the dome portion 132A is convex is changed from the convex state to the downward side. The metal contact 130A is an example of a movable contact member. The metal contact 130A is made of stainless steel, for example.
　メタルコンタクト１３０Ａは、ドーム部１３２Ａの頂部が中央固定接点１２１Ａの上方に位置するとともに、基部１３１Ａが周辺固定接点１２１Ｂに接触した状態で配置されている。そのため、ドーム部１３２Ａは、ドーム部１３２Ａが上側から押圧されて反転動作して下側に凸になると、反転したドーム部１３２Ａが中央固定接点１２１Ａに接触し、メタルコンタクト１３０Ａが中央固定接点１２１Ａと周辺固定接点１２１Ｂを導通させる。メタルコンタクト１３０Ａは、下面に銀めっきが施されている。下面は、電流が流れる中央固定接点１２１Ａ及び周辺固定接点１２１Ｂと接触するからである。また、ドーム部１３２Ａが反転動作することで、操作者に操作感触を与えることができる。 The metal contact 130A is arranged such that the top of the dome portion 132A is located above the central fixed contact 121A and the base 131A is in contact with the peripheral fixed contact 121B. Therefore, in the dome portion 132A, when the dome portion 132A is pressed from the upper side to invert and convex downward, the inverted dome portion 132A contacts the central fixed contact 121A, and the metal contact 130A becomes the central fixed contact 121A. The peripheral fixed contact 121B is made conductive. The metal contact 130A has a lower surface plated with silver. This is because the lower surface comes into contact with the central fixed contact 121A and the peripheral fixed contact 121B through which current flows. In addition, the operation feeling can be given to the operator by inverting the dome portion 132A.
　このようなメタルコンタクト１３０Ａは、平面視で略矩形状に成型された板金にパンチング処理でドーム部１３２Ａを形成することによって作製される。 Such a metal contact 130A is produced by forming a dome portion 132A by punching on a sheet metal formed into a substantially rectangular shape in plan view.
　リーフスプリング１３０Ｂは、メタルコンタクト１３０Ａから銀めっきを取り除いた構成を有する。このため、リーフスプリング１３０Ｂは、基部１３１Ｂとドーム部１３２Ｂと有する。リーフスプリング１３０Ｂは、メタルコンタクト１３０Ａに重ねて配置される。 The leaf spring 130B has a configuration in which silver plating is removed from the metal contact 130A. Therefore, the leaf spring 130B has a base portion 131B and a dome portion 132B. The leaf spring 130B is arranged so as to overlap the metal contact 130A.
　リーフスプリング１３０Ｃは、リーフスプリング１３０Ｂと同一の構成を有するため、基部１３１Ｃとドーム部１３２Ｃと有する。リーフスプリング１３０Ｃは、リーフスプリング１３０Ｂに重ねて配置される。 Since the leaf spring 130C has the same configuration as the leaf spring 130B, it has a base portion 131C and a dome portion 132C. The leaf spring 130C is arranged so as to overlap the leaf spring 130B.
　メタルスプリング１４０は、４本の脚部１４１と、中央部１４２とを有する金属製の板ばねである。中央部１４２は、４本の脚部１４１の中央に位置し、平面視で円形の平板状の部分である。 The metal spring 140 is a metal leaf spring having four leg portions 141 and a central portion 142. The central portion 142 is located at the center of the four leg portions 141 and is a circular flat plate portion in plan view.
　４本の脚部１４１は、平面視で中央部１４２から等間隔（９０度間隔）で外側に向かうように、かつ、側面視で中央部１４２から斜め下方向に向かうように延在している。このようなメタルスプリング１４０は、略十字状に切断された板金にパンチング処理で脚部１４１を形成することによって作製される。また、各脚部１４１は、収納部１１２の四隅に向かって延在しているため、脚部１４１を長くすることができる。 The four leg portions 141 extend outward from the central portion 142 at equal intervals (intervals of 90 degrees) in a plan view and obliquely downward from the central portion 142 in a side view. .. The metal spring 140 as described above is manufactured by forming the leg portions 141 by punching a sheet metal cut into a substantially cross shape. Moreover, since each leg part 141 extends toward the four corners of the storage part 112, the leg part 141 can be lengthened.
　各脚部１４１は、折り曲げ部１４１Ａを有する。脚部１４１は、中央部１４２から折り曲げ部１４１Ａに向かって斜め下方向に延在し、折り曲げ部１４１Ａで折り曲げられ、先端に向かって斜め上方向に延在する形状を有する。 Each leg 141 has a bent portion 141A. The leg portion 141 has a shape that extends obliquely downward from the central portion 142 toward the bent portion 141A, is bent at the bent portion 141A, and extends obliquely upward toward the tip.
　脚部１４１の高さ（折り曲げ部１４１Ａから中央部１４２に接続される付け根までのＺ軸方向の長さ）は、リーフスプリング１３０Ｃのドーム部１３２Ｃの高さ（基部１３１Ｃに対するドーム部１３２Ｃの頂部の高さ）よりも高く設定されている。また、４個の折り曲げ部１４１Ａの位置は、平面視でリーフスプリング１３０Ｃのドーム部１３２Ｃよりも外側にある。 The height of the leg portion 141 (the length in the Z-axis direction from the bent portion 141A to the root connected to the central portion 142) is the height of the dome portion 132C of the leaf spring 130C (the top of the dome portion 132C with respect to the base portion 131C). Height) is set higher than. Further, the positions of the four bent portions 141A are outside the dome portion 132C of the leaf spring 130C in plan view.
　メタルスプリング１４０は、平面視で４本の脚部１４１と、リーフスプリング１３０Ｃの基部１３１Ｃの四隅との位置を合わせてリーフスプリング１３０Ｃに重ねられた状態で、４個の折り曲げ部１４１Ａが基部１３１Ｃの四隅の上面に接触し、中央部１４２とドーム部１３２Ｃとの間に隙間が生じ、かつ、脚部１４１とドーム部１３２Ｃとの間に隙間が生じる形状を有する。 In the metal spring 140, when the four leg portions 141 and the four corners of the base portion 131C of the leaf spring 130C are aligned with each other in a plan view and overlapped with the leaf spring 130C, the four bent portions 141A have the base portion 131C. It has such a shape that it contacts the upper surfaces of the four corners, a gap is formed between the central portion 142 and the dome portion 132C, and a gap is formed between the leg portion 141 and the dome portion 132C.
　このため、メタルスプリング１４０を平面視で位置を合わせてリーフスプリング１３０Ｃに重ねると、メタルスプリング１４０は、４本の脚部１４１の折り曲げ部１４１Ａがリーフスプリング１３０Ｃの基部１３１Ｃの四隅の上面にそれぞれ当接した状態で、中央部１４２がリーフスプリング１３０Ｃのドーム部１３２Ｃから離間した状態になる。 Therefore, when the metal springs 140 are aligned with each other in plan view and overlapped with the leaf springs 130C, the bent portions 141A of the four leg portions 141 of the metal springs 140 respectively contact the upper surfaces of the four corners of the base portion 131C of the leaf springs 130C. In the contact state, the central portion 142 is separated from the dome portion 132C of the leaf spring 130C.
　メタルスプリング１４０は、押圧部材１５０によって中央部１４２が下方向に押圧されると、脚部１４１が中央部１４２から外側に押し広げられるように弾性変形するので、中央部がリーフスプリング１３０Ｃのドーム部１３２Ｃに近づく。 When the central portion 142 is pressed downward by the pressing member 150, the metal spring 140 elastically deforms so that the leg portions 141 are spread outward from the central portion 142, so that the central portion is the dome portion of the leaf spring 130C. It approaches 132C.
　このようにメタルスプリング１４０が弾性変形して、脚部１４１の折り曲げ部１４１Ａよりも中央部１４２側の部分、又は、中央部１４２のどちらかがリーフスプリング１３０Ｃのドーム部１３２Ｃに接触するまでの動作領域が、プリストロークの動作領域になる。 In this way, the metal spring 140 is elastically deformed, and the operation until the portion of the leg 141 closer to the central portion 142 than the bent portion 141A or the central portion 142 comes into contact with the dome portion 132C of the leaf spring 130C. The area becomes the operation area of the prestroke.
　メタルスプリング１４０は、押圧部材１５０によってさらに下方に押圧されると、リーフスプリング１３０Ｃのドーム部１３２Ｃを下方に押し下げるメインストロークの動作領域に遷移する。 When the metal spring 140 is further pressed downward by the pressing member 150, the metal spring 140 transitions to the operation region of the main stroke in which the dome portion 132C of the leaf spring 130C is pressed downward.
　押圧部材１５０は、基部１５１と突出部１５２とを有し、基部１５１と突出部１５２の下端側とが収納部１１２に収納される。基部１５１は、円錐台形の突出部１５２の下端の周囲に設けられた円盤状の部分であり、基部１５１の中央部の上面から突出部１５２が突出している。押圧部材１５０は、所謂ステムである。 The pressing member 150 has a base 151 and a protrusion 152, and the base 151 and the lower end side of the protrusion 152 are housed in the housing 112. The base 151 is a disk-shaped portion provided around the lower end of the truncated cone-shaped protrusion 152, and the protrusion 152 protrudes from the upper surface of the central portion of the base 151. The pressing member 150 is a so-called stem.
　押圧部材１５０は、硬質材料製であり、一例として、弾性変形が殆ど生じない合成樹脂、金属、又はセラミック等で作製される。すなわち、硬質材料とは、弾性変形が殆ど生じない合成樹脂、金属、又はセラミック等であり、理想的には弾性を有しない材料である。プッシュスイッチ１００は、メインストロークの動作領域において、押圧部材１５０の弾性変形によるストロークの増大を抑制するために、押圧部材１５０を弾性変形が殆ど生じない硬質材料製にしている。 The pressing member 150 is made of a hard material, and is made of, for example, a synthetic resin, a metal, a ceramic, or the like that hardly causes elastic deformation. That is, the hard material is a synthetic resin, a metal, a ceramic, or the like that hardly elastically deforms, and ideally a material having no elasticity. In the push switch 100, in order to suppress an increase in stroke due to elastic deformation of the pressing member 150 in the operation region of the main stroke, the pressing member 150 is made of a hard material that hardly elastically deforms.
　フレーム１６０は、基部１６１及び脚部１６２を有する。基部１６１は、平面視で矩形状であり、開口部１６１Ａを有する。基部１６１は、筐体１１０の上面に重ねて配置され、開口部１６１Ａは、押圧部材１５０の突出部１５２を挿通させることができる開口径を有する。 The frame 160 has a base 161 and legs 162. The base 161 has a rectangular shape in a plan view and has an opening 161A. The base 161 is arranged so as to overlap the upper surface of the housing 110, and the opening 161A has an opening diameter that allows the protrusion 152 of the pressing member 150 to be inserted therethrough.
　脚部１６２は、基部１６１のＹ軸方向両側に２本ずつ設けられており、それぞれＺ軸負方向へ突出し、先端がＸ軸方向かつ、平面視で内側を向く方向に折り曲げられた係合部１６２Ａを有する。各脚部１６２は、筐体１１０の側面に密着し、係合部１６２Ａは筐体１１０の側面の突起に係合する。 Two leg portions 162 are provided on each side of the base portion 161 in the Y-axis direction. The leg portions 162 project in the Z-axis negative direction, and the tips are bent in the X-axis direction and inward in a plan view. It has 162A. Each leg 162 is in close contact with the side surface of the housing 110, and the engagement portion 162A is engaged with a protrusion on the side surface of the housing 110.
　図２に示すメタルコンタクト１３０Ａ、リーフスプリング１３０Ｂ、１３０Ｃ、メタルスプリング１４０を筐体１１０の収納部１１２に収納し、メタルスプリング１４０の上に押圧部材１５０を配置した状態で、筐体１１０の上からフレーム１６０を被せて固定すると、図１に示すようにプッシュスイッチ１００が完成する。 The metal contact 130A, the leaf springs 130B and 130C, and the metal spring 140 shown in FIG. 2 are housed in the housing portion 112 of the housing 110, and the pressing member 150 is arranged on the metal spring 140. When the frame 160 is covered and fixed, the push switch 100 is completed as shown in FIG.
　この状態で、メタルコンタクト１３０Ａ、リーフスプリング１３０Ｂ、１３０Ｃ、メタルスプリング１４０、及び押圧部材１５０は、ガタつかないように保持されている。 In this state, the metal contact 130A, the leaf springs 130B and 130C, the metal spring 140, and the pressing member 150 are held so as not to rattle.
　なお、基部１６１のＸ軸方向の両側に、筐体１１０の側面の凹部に係合する係合部を設けてもよい。 Note that engaging portions that engage with the recesses on the side surface of the housing 110 may be provided on both sides of the base 161 in the X-axis direction.
　以上のような構成を有するプッシュスイッチ１００は、一例として、車両の室内における各種操作系のスイッチとして用いることが可能である。このような場合には、押圧部材１５０の突出部１５２を薄い樹脂シート等で覆われてもよい。 The push switch 100 having the above-described configuration can be used as a switch for various operation systems in a vehicle cabin, for example. In such a case, the protrusion 152 of the pressing member 150 may be covered with a thin resin sheet or the like.
　また、車両の走行によって生じる振動によってプッシュスイッチ１００のメタルコンタクト１３０Ａ、リーフスプリング１３０Ｂ、１３０Ｃ、メタルスプリング１４０、及び押圧部材１５０がガタつかないようにするために、図１に示す初期位置よりも押圧部材１５０を少し下方に押し込んだ状態で取り付けられることがある。このような場合には、プレストロークの範囲内で押圧部材１５０を下方向に押圧した状態で取り付ければよい。なお、このように押圧部材１５０を下方向に押圧した状態で取り付けることにより、プッシュスイッチ１００の個体差を吸収するようにしてもよい。 Further, in order to prevent the metal contact 130A, the leaf springs 130B and 130C, the metal spring 140, and the pressing member 150 of the push switch 100 from rattling due to the vibration generated by the traveling of the vehicle, the push switch 100 is pressed more than the initial position shown in FIG. The member 150 may be attached with the member 150 pushed slightly downward. In such a case, the pressing member 150 may be attached while being pressed downward within the range of the prestroke. The pressing member 150 may be attached in a downwardly pressed state as described above to absorb individual differences of the push switch 100.
　図４Ａ乃至図４Ｆは、プッシュスイッチ１００のＦＳ（Force-Stroke）特性を示す図である。横軸が押圧部材１５０を下方に押し込むストローク（Ｓ）であり、縦軸が押圧部材１５０を下方に押し込む際に必要な力（Ｆ）である。力（Ｆ）は操作荷重である。 4A to 4F are diagrams showing FS (Force-Stroke) characteristics of the push switch 100. The horizontal axis is the stroke (S) for pushing the pressing member 150 downward, and the vertical axis is the force (F) required for pushing the pressing member 150 downward. Force (F) is the operating load.
　図４Ａは、メタルスプリング１４０及び押圧部材１５０だけでのＦＳ特性を示し、図４Ｂは、メタルコンタクト１３０Ａとリーフスプリング１３０Ｂ、１３０ＣだけでのＦＳ特性を示し、図４Ｃは、プッシュスイッチ１００全体のＦＳ特性を示す。 4A shows the FS characteristics of only the metal spring 140 and the pressing member 150, FIG. 4B shows the FS characteristics of only the metal contact 130A and the leaf springs 130B and 130C, and FIG. 4C shows the FS of the entire push switch 100. Show the characteristics.
　また、比較用のプッシュスイッチとして、メタルスプリング１４０及び押圧部材１５０の代わりに、従来のように弾性変形することによってプリストロークを実現する押圧部材を含むプッシュスイッチのＦＳ特性を示す。図４Ｄは、比較用のプッシュスイッチの押圧部材単独でのＦＳ特性を示し、図４Ｅは、メタルコンタクト１３０Ａとリーフスプリング１３０Ｂ、１３０ＣだけでのＦＳ特性を示し、図４Ｆは、比較用のプッシュスイッチ全体でのＦＳ特性を示す。なお、図４Ｂと図４ＥのＦＳ特性は等しい。 Further, as a push switch for comparison, instead of the metal spring 140 and the pressing member 150, the FS characteristics of a push switch including a pressing member that realizes a prestroke by elastically deforming as in the conventional case are shown. FIG. 4D shows the FS characteristics of the pressing member alone of the comparison push switch, FIG. 4E shows the FS characteristics of only the metal contact 130A and the leaf springs 130B and 130C, and FIG. 4F shows the comparison push switch. The FS characteristics as a whole are shown. The FS characteristics of FIG. 4B and FIG. 4E are the same.
　図４Ａに示すように、メタルスプリング１４０及び押圧部材１５０だけでのＦＳ特性は、ストロークが０．０ｍｍから約０．５５ｍｍくらいまでは操作荷重が線形的に立ち上がり、ストロークが約０．５５ｍｍに達すると、操作荷重をそれ以上増やしても、ストロークは略一定になる特性を示した。押圧部材１５０は、弾性変形が殆ど生じない硬質材料製であることから、図４Ａに示すＦＳ特性は殆どメタルスプリング１４０だけのＦＳ特性であることを確認できた。さらに、メタルスプリング１４０はその弾性変形を妨げる剛体に接触すると、それ以上操作ストロークが増えないことも確認できた。 As shown in FIG. 4A, the FS characteristics of only the metal spring 140 and the pressing member 150 show that the operating load rises linearly from the stroke of 0.0 mm to about 0.55 mm and reaches the stroke of about 0.55 mm. Then, even if the operating load was increased further, the stroke showed a characteristic of being substantially constant. Since the pressing member 150 is made of a hard material that hardly elastically deforms, it can be confirmed that the FS characteristic shown in FIG. 4A is almost the FS characteristic of only the metal spring 140. Furthermore, it was confirmed that when the metal spring 140 comes into contact with a rigid body that prevents its elastic deformation, the operation stroke does not increase any further.
　また、図４Ｂに示すように、メタルコンタクト１３０Ａとリーフスプリング１３０Ｂ、１３０ＣだけでのＦＳ特性は、ストロークが約０．３５ｍｍに達するまでは操作荷重が略ゼロであり、ストロークが約０．４７ｍｍで操作荷重がピークになり、ストロークが約０．６ｍｍで操作荷重が極小値を取り、ストロークが約０．６ｍｍの時点でそれ以上押圧できない状態になることを示した。これは、ストロークが約０．４７ｍｍの時点でメタルコンタクト１３０Ａとリーフスプリング１３０Ｂ、１３０Ｃのドーム部１３２Ａ、１３２Ｂ、１３２Ｃが反転し始め、ストロークが約０．６ｍｍの時点で完全に反転した状態になることを示している。完全に反転した状態は、プッシュスイッチ１００がオンになる状態である。図４Ｂからは、メタルコンタクト１３０Ａとリーフスプリング１３０Ｂ、１３０Ｃがその弾性変形を妨げる剛体に接触すると、それ以上操作ストロークが増えないことも確認できた。 Further, as shown in FIG. 4B, the FS characteristic of only the metal contact 130A and the leaf springs 130B and 130C is that the operating load is substantially zero until the stroke reaches about 0.35 mm, and the stroke is about 0.47 mm. It was shown that the operation load reached a peak, the stroke had a minimum value at a stroke of about 0.6 mm, and the stroke could not be further pressed at a stroke of about 0.6 mm. This means that the metal contact 130A and the dome portions 132A, 132B, 132C of the leaf springs 130B, 130C start to reverse at a stroke of about 0.47 mm, and become completely reversed at a stroke of about 0.6 mm. It is shown that. The completely inverted state is a state in which the push switch 100 is turned on. From FIG. 4B, it was also confirmed that when the metal contact 130A and the leaf springs 130B and 130C contact the rigid body that prevents the elastic deformation, the operation stroke does not increase any more.
　また、図４Ｃは、プッシュスイッチ１００全体のＦＳ特性であり、ストロークが約０．３４ｍｍ付近でメタルコンタクト１３０Ａがリーフスプリング１３０Ｃを押圧し始めるように、図４Ａと図４ＢのＦＳ特性を合成した特性になっている。プレストロークが終了してメインストロークが開始するのは、約０．３４ｍｍであり、メインストロークが完了するのは、約０．５９ｍｍである。 Further, FIG. 4C is an FS characteristic of the entire push switch 100. A characteristic obtained by combining the FS characteristics of FIG. 4A and FIG. 4B so that the metal contact 130A starts to press the leaf spring 130C at a stroke of about 0.34 mm. It has become. The prestroke ends and the main stroke begins about 0.34 mm, and the main stroke completes about 0.59 mm.
　このため、プッシュスイッチ１００では、メインストロークの動作領域でオンにするのに必要なストロークを０．２５ｍｍにすることができ、ショートストローク化を実現できることが分かった。これは、メインストロークの動作領域において、押圧部材１５０の弾性変形が殆ど生じなかったためである。 Therefore, with the push switch 100, it was found that the stroke required to be turned on in the operation area of the main stroke can be set to 0.25 mm, and a short stroke can be realized. This is because the pressing member 150 hardly elastically deformed in the operation region of the main stroke.
　一方、比較用のプッシュスイッチでは、図４Ｄに示すように、硬質材料ではない材料からなり弾性変形する押圧部材だけでのＦＳ特性は、ストロークが０．０ｍｍから約０．３ｍｍくらいまで操作荷重が非線形的に立ち上がった後に、ストロークが約０．６５ｍｍくらいまでは操作荷重が少し低下している。ストロークが約０．６５ｍｍ以上になると、操作荷重が急激に増大している。ただし、図４Ａと比較すると、その増大の仕方は緩やかである。これはストロークが約０．６５ｍｍの位置で剛体に接触して弾性変形が一旦止められた後に、押圧部材が押しつぶされることにより弾性変形しているためである。 On the other hand, in the push switch for comparison, as shown in FIG. 4D, the FS characteristic of only the pressing member made of a material other than a hard material and elastically deformed has an operating load from a stroke of about 0.0 mm to about 0.3 mm. After rising up in a non-linear manner, the operating load is slightly reduced until the stroke is about 0.65 mm. When the stroke is about 0.65 mm or more, the operating load sharply increases. However, as compared with FIG. 4A, the manner of increase is gradual. This is because when the stroke is about 0.65 mm, the rigid member comes into contact with the rigid body to temporarily stop the elastic deformation, and then the pressing member is crushed to elastically deform.
　図４Ｅに示すメタルコンタクト１３０Ａとリーフスプリング１３０Ｂ、１３０ＣだけでのＦＳ特性は図４Ｂと同一であるため、説明を省略する。 The FS characteristics of only the metal contact 130A and the leaf springs 130B and 130C shown in FIG. 4E are the same as those in FIG. 4B, so the description thereof will be omitted.
　また、図４Ｆは、比較用のプッシュスイッチ全体のＦＳ特性であり、ストロークが約０．４ｍｍの位置で押圧部材がリーフスプリング１３０Ｃに接触するように、図４Ｄと図４ＥのＦＳ特性を合成した特性になっている。プレストロークが終了してメインストロークが開始するのは、約０．３９ｍｍであり、比較用のプッシュスイッチがオンになるのは、約０．７２ｍｍである。 Further, FIG. 4F shows the FS characteristics of the entire push switch for comparison. The FS characteristics of FIGS. 4D and 4E are combined so that the pressing member contacts the leaf spring 130C at a position where the stroke is about 0.4 mm. It is a characteristic. The pre-stroke ends and the main stroke starts about 0.39 mm, and the comparison push switch turns on about 0.72 mm.
　このため、比較用のプッシュスイッチでは、メインストロークの動作領域でオンにするのに必要なストロークは約０．３３ｍｍであり、プッシュスイッチ１００よりもストロークが約３０％長いことが分かった。このように比較用のプッシュスイッチでストロークが長くなったのは、メインストロークの動作領域において、メタルコンタクト１３０Ａおよびリーフスプリング１３０Ｂ、１３０Ｃが弾性変形するだけでなく、押圧部材の弾性変形が生じたためである。すなわち、メタルコンタクト１３０Ａおよびリーフスプリング１３０Ｂ、１３０Ｃが弾性変形を開始する前に、押圧部材が押しつぶされるため、その分のストロークが長くなっている。図４Ｆのメインストロークが始まった直後（０．４ｍｍ直後）の操作荷重の立ち上がり方が、図４Ｅの操作荷重の立ち上がり方に対して緩やかなのは、押圧部材が押しつぶされた分の成分が合成されているためである。 Therefore, in the push switch for comparison, the stroke required to turn on in the operation area of the main stroke is about 0.33 mm, which is about 30% longer than the push switch 100. In this way, the stroke of the push switch for comparison is lengthened because not only the metal contact 130A and the leaf springs 130B and 130C are elastically deformed but also the pressing member is elastically deformed in the operation region of the main stroke. is there. That is, since the pressing member is crushed before the metal contact 130A and the leaf springs 130B and 130C start elastically deforming, the stroke becomes longer. The rising of the operating load immediately after the start of the main stroke in FIG. 4F (immediately after 0.4 mm) is gentler than the rising of the operating load in FIG. 4E because the components of the crushed pressing member are combined. This is because
　図５Ａ及び図５Ｂは、プッシュスイッチ１００をオン／オフする際の操作音のレベルの周波数分布を示す図である。プッシュスイッチ１００としては、ＦＳ特性の極大値に対する極小値の低下率が２０％のものと３０％のものを準備した。この低下率が大きいほど、押圧部材１５０を手で操作したときに操作者が得るクリック感が強いことになる。 5A and 5B are diagrams showing frequency distributions of operation sound levels when the push switch 100 is turned on / off. As the push switch 100, one having a reduction rate of the minimum value with respect to the maximum value of the FS characteristic of 20% or 30% was prepared. The larger the reduction rate, the stronger the click feeling that the operator obtains when operating the pressing member 150 by hand.
　また、ここでは比較用に、メタルスプリング１４０及び押圧部材１５０の代わりに、従来のように弾性変形することによってプリストロークを実現する押圧部材を含む比較用のプッシュスイッチの操作音のレベルも示す。 Also, here, for comparison, instead of the metal spring 140 and the pressing member 150, the operation sound level of the push switch for comparison including the pressing member that realizes the prestroke by elastically deforming as in the conventional case is also shown.
　なお、プッシュスイッチ１００をオンする際の操作音のレベルとは、メインストロークの動作領域において、プッシュスイッチ１００がオンになるまで押圧部材１５０を下方に押圧したときに生じる操作音のレベルである。これは比較用のプッシュスイッチにおいても同様である。 The level of the operation sound when the push switch 100 is turned on is the level of the operation sound generated when the pressing member 150 is pressed downward until the push switch 100 is turned on in the operation region of the main stroke. The same applies to the push switch for comparison.
　また、プッシュスイッチ１００をオフする際の操作音のレベルとは、プッシュスイッチ１００がオンの状態において、押圧部材１５０を開放し（典型的には押圧部材１５０を押す手を離し）、押圧部材１５０が初期位置に戻るときの操作音のレベルである。 Further, the level of the operation sound when the push switch 100 is turned off means that the push member 100 is opened (typically, the hand pushing the push member 150 is released) and the push member 150 is turned on when the push switch 100 is on. Is the level of the operation sound when is returned to the initial position.
　図５Ａに示すように、プッシュスイッチ１００をオンする際の操作音のレベルは、低下率が２０％のものと３０％のもので略等しく、また、比較用のプッシュスイッチも略等しいレベルであった。 As shown in FIG. 5A, the levels of the operation sound when the push switch 100 is turned on are substantially equal for the reduction rate of 20% and 30%, and the comparison push switches are also of substantially the same level. It was
　また、図５Ｂに示すように、プッシュスイッチ１００をオフする際の操作音のレベルは、比較用のプッシュスイッチに比べて、低下率が２０％と３０％の両方のプッシュスイッチ１００において低減されていることが分かった。このようにオフにする際の操作音が低減されたのは、押圧部材１５０が初期位置に戻る際にメタルスプリング１４０に掛かる負荷が４本の脚部１４１に分散されたためと考えられる。 Further, as shown in FIG. 5B, the level of the operation sound when turning off the push switch 100 is reduced in both the push switches 100 whose reduction rates are 20% and 30% as compared with the push switch for comparison. I found out that It is considered that the reason why the operation sound at the time of turning off is reduced is that the load applied to the metal spring 140 when the pressing member 150 returns to the initial position is distributed to the four legs 141.
　このように、ショートストローク化を図っても、プッシュスイッチ１００をオンする際の操作音は、比較用のプッシュスイッチと同レベルであり、プッシュスイッチ１００をオフする際の操作音は、比較用のプッシュスイッチよりも低減されていることが分かった。 As described above, even if the short stroke is achieved, the operation sound when the push switch 100 is turned on is at the same level as that of the comparison push switch, and the operation sound when the push switch 100 is turned off is the same as that of the comparison push switch. It turned out that it is reduced more than the push switch.
　以上のように、実施の形態によれば、メタルコンタクト１３０Ａ、リーフスプリング１３０Ｂ、１３０Ｃの積層体と、押圧部材１５０との間に、プリストローク用のメタルスプリング１４０を設けるとともに、押圧部材１５０を硬質材料製で殆ど弾性変形しないステムにしたことにより、比較用のプッシュスイッチと比べて、メインストロークの動作領域においてオンするまでのストロークを大幅に短くできることが分かった。 As described above, according to the embodiment, the pre-stroke metal spring 140 is provided between the stacked body of the metal contact 130A, the leaf springs 130B and 130C, and the pressing member 150, and the pressing member 150 is hard. It was found that by using a stem made of a material that hardly elastically deforms, the stroke to be turned on in the operation region of the main stroke can be significantly shortened as compared with the push switch for comparison.
　このようなショートストローク化は、プリストローク用のメタルスプリング１４０と、硬質材料製で殆ど弾性変形しない押圧部材１５０とによって、比較的容易に実現することができる。 Such a short stroke can be relatively easily realized by the metal spring 140 for prestroke and the pressing member 150 made of a hard material and hardly elastically deformed.
　したがって、ショートストローク化を容易に実現できるプッシュスイッチ１００を提供することができる。 Therefore, it is possible to provide the push switch 100 that can easily realize the short stroke.
　比較用のプッシュスイッチのように、弾性変形する押圧部材を含む場合には、図４Ｄに示すように操作荷重に応じて押圧部材は変形し続けるため、ショートストローク化を実現することは容易ではない。 When a pressing member that elastically deforms is included like the push switch for comparison, the pressing member continues to deform according to the operation load as shown in FIG. 4D, and thus it is not easy to realize a short stroke. ..
　これに対して、実施の形態のプッシュスイッチ１００は、メタルスプリング１４０でプリストロークを実現し、メインストロークの動作領域ではメタルスプリング１４０が完全に押し潰されて殆ど変形しない状態になるとともに、押圧部材１５０を殆ど弾性変形しない硬質材料製にしたため、比較的容易にショートストローク化を実現することができる。 On the other hand, in the push switch 100 of the embodiment, the metal spring 140 realizes the prestroke, and the metal spring 140 is completely crushed in the operation region of the main stroke to be hardly deformed and the pressing member is pressed. Since 150 is made of a hard material that is hardly elastically deformed, it is possible to realize a short stroke relatively easily.
　また、押圧部材１５０を殆ど弾性変形しないため、長期にわたって安定したストロークでの操作が可能になる。 Also, since the pressing member 150 is hardly elastically deformed, it is possible to operate with a stable stroke for a long period of time.
　また、以上では、メタルスプリング１４０が４本の脚部１４１を有するため、プリストロークの動作領域における操作荷重を大きくすることができる。また、操作荷重による負荷が４本の脚部１４１に分散されるため、長寿命化を図るとともに、オフ時の操作音を低減することができる。 Further, in the above, since the metal spring 140 has the four leg portions 141, it is possible to increase the operation load in the operation region of the prestroke. Further, since the load due to the operation load is distributed to the four legs 141, it is possible to prolong the service life and reduce the operation noise at the time of turning off.
　また、以上では、メタルスプリング１４０の脚部１４１が弾性変形する形態について説明したが、中央部１４２が弾性変形してもよい。例えば、中央部１４２が非押圧状態で上に凸のドーム型であり、反転動作可能な構成であってもよい。この場合には、脚部１４１は弾性変形可能でも、弾性変形しない構成であってもよい。 In the above, the leg 141 of the metal spring 140 is elastically deformed, but the central portion 142 may be elastically deformed. For example, the central portion 142 may be a dome shape that is convex upward in a non-pressed state, and may have a configuration capable of reversing operation. In this case, the leg 141 may be elastically deformable or may not be elastically deformed.
　また、以上では、メタルスプリング１４０の脚部１４１が中央部１４２から側面視で斜め下方向に延在する形態について説明したが、脚部１４１は、中央部１４２とＺ軸方向において等しい高さで水平方向（ＸＹ平面の方向）に延在していてもよい。この場合には、例えば、リーフスプリング１３０Ｃの基部１３１Ｃと脚部１４１との間に、スペーサを設けることによって、非押圧状態でメタルスプリング１４０とリーフスプリング１３０Ｃとの間に隙間が生じるようにすればよい。 In the above description, the leg portion 141 of the metal spring 140 extends obliquely downward from the central portion 142 in a side view, but the leg portion 141 has the same height as the central portion 142 in the Z-axis direction. It may extend in the horizontal direction (direction of the XY plane). In this case, for example, by providing a spacer between the base 131C of the leaf spring 130C and the leg 141, a gap may be created between the metal spring 140 and the leaf spring 130C in a non-pressed state. Good.
　また、以上では、メタルスプリング１４０の脚部１４１の折り曲げ部１４１Ａが基部１３１Ｃの四隅の上面に接触する形態について説明した。メタルスプリング１４０は、板金をパンチング処理で打ち抜くことによって作製されるため、側面は打ち抜かれた面である。このように、折り曲げ部１４１Ａが基部１３１Ｃの上面に接触する構成では、メタルスプリング１４０が下方に押圧された際に、メタルスプリング１４０の側面（打ち抜かれた面）が基部１３１Ｃの上面に接触することはないので、メタルスプリング１４０の動作に伴って、側面（打ち抜かれた面）から削れ粉が発生することを抑制でき、削れ粉による電気的な接触不良の発生を抑制することができる。 In the above description, the bent portions 141A of the legs 141 of the metal spring 140 contact the upper surfaces of the four corners of the base 131C. Since the metal spring 140 is manufactured by punching a sheet metal by punching processing, the side surface is a punched surface. In this manner, in the configuration in which the bent portion 141A contacts the upper surface of the base 131C, the side surface (punched surface) of the metal spring 140 contacts the upper surface of the base 131C when the metal spring 140 is pressed downward. Therefore, it is possible to suppress the generation of shavings from the side surface (punched surface) along with the operation of the metal spring 140, and it is possible to suppress the occurrence of electrical contact failure due to the shavings.
　また、以上では、メタルスプリング１４０の脚部１４１が中央部１４２から折り曲げ部１４１Ａに向かって斜め下方向に延在し、折り曲げ部１４１Ａで折り曲げられ、先端に向かって斜め上方向に延在する形状を有する形態について説明した。このような構成では、押圧部材１５０の突出部１５２が斜め方向から押圧されても、４本の脚部１４１に均等に荷重が掛かり易い。また、このような構成により、リーフスプリング１３０Ｃと押圧部材１５０との間で、メタルスプリング１４０を安定的に配置することができる。 Further, in the above, the shape in which the leg portion 141 of the metal spring 140 extends obliquely downward from the central portion 142 toward the bent portion 141A, is bent at the bent portion 141A, and extends obliquely upward toward the tip end. The above has been described. With such a configuration, even if the protruding portion 152 of the pressing member 150 is pressed in an oblique direction, the four leg portions 141 are likely to be uniformly loaded. Further, with such a configuration, the metal spring 140 can be stably arranged between the leaf spring 130C and the pressing member 150.
　しかしながら、脚部１４１は、折り曲げ部１４１Ａで水平方向に折り曲げられていてもよい。このような構成の場合には、メタルスプリング１４０が下方に押圧された際に、脚部１４１の折り曲げ部１４１Ａよりも先端側は、リーフスプリング１３０Ｃの基部１３１Ｃの上面から離間するので、メタルスプリング１４０の側面（打ち抜かれた面）が基部１３１Ｃの上面に接触することはなく、メタルスプリング１４０の動作に伴って、側面（打ち抜かれた面）から削れ粉が発生することを抑制でき、削れ粉による電気的な接触不良の発生を抑制することができる。 However, the leg portion 141 may be bent horizontally at the bent portion 141A. In the case of such a configuration, when the metal spring 140 is pressed downward, the tip end side of the bent portion 141A of the leg portion 141 is separated from the upper surface of the base portion 131C of the leaf spring 130C. Side surface (punched surface) does not contact the upper surface of the base 131C, and it is possible to suppress generation of shavings from the side surface (punched surface) due to the operation of the metal spring 140. The occurrence of electrical contact failure can be suppressed.
　また、以上では、メタルスプリング１４０の脚部１４１が折り曲げ部１４１Ａで折り曲げられている形態について説明したが、脚部１４１は折り曲げられておらず、先端がリーフスプリング１３０Ｃの基部１３１Ｃの上面に接触していてもよい。先端も側面（打ち抜かれた面）の一部であるが、削れ粉の発生による影響が殆ど生じないような場合には、このような構成であってもよい。 In the above description, the leg 141 of the metal spring 140 is bent at the bent portion 141A. However, the leg 141 is not bent, and the tip of the leg 141 contacts the upper surface of the base 131C of the leaf spring 130C. May be. The tip is also a part of the side surface (punched surface), but in the case where the influence of the generation of shavings hardly occurs, such a configuration may be adopted.
　また、以上では、メタルスプリング１４０の脚部１４１が４本ある形態について説明したが、脚部１４１は３本であってもよいし、動作の安定性が確保できるのであれば２本であってもよい。 In the above description, the metal spring 140 has four legs 141, but the number of legs 141 may be three, or two if the stability of the operation can be ensured. Good.
　また、以上では、開口部１１１及び収納部１１２は平面視で正方形である形態について説明したが、Ｘ軸方向又はＹ軸方向に長い長方形であってもよい。この場合には、脚部１４１の長さをより長くすることができ、プリストロークの量をより多く取ることができる。このため、プッシュスイッチ１００の仕様等に応じて、操作荷重を設定し易い構成にすることができる。 Also, in the above description, the shape in which the opening 111 and the accommodating portion 112 are square in a plan view has been described, but it may be a rectangle long in the X-axis direction or the Y-axis direction. In this case, the length of the leg portion 141 can be made longer, and a larger amount of prestroke can be taken. Therefore, the operation load can be easily set according to the specifications of the push switch 100.
　また、以上では、プッシュスイッチ１００が、メタルコンタクト１３０Ａに重ねられるリーフスプリング１３０Ｂ、１３０Ｃを含む形態について説明した。リーフスプリング１３０Ｂ、１３０Ｃは、メインストロークの動作領域における操作荷重を大きくするために設けられている。このため、リーフスプリング１３０Ｂ、１３０Ｃが不要な場合には、プッシュスイッチ１００は、リーフスプリング１３０Ｂ、１３０Ｃを含まなくてもよく、１枚だめ（リーフスプリング１３０Ｂだけ）を含んでもよく、３枚以上含んでもよい。 Also, in the above, the push switch 100 has been described as including the leaf springs 130B and 130C that are stacked on the metal contact 130A. The leaf springs 130B and 130C are provided to increase the operation load in the operation area of the main stroke. For this reason, when the leaf springs 130B and 130C are unnecessary, the push switch 100 may not include the leaf springs 130B and 130C, may include one spring (only the leaf spring 130B), and may include three or more springs. But it's okay.
　また、以上では、押圧部材１５０の基部１５１の下面が平坦である形態について説明したが、基部１５１の下面の中央に突起を設けてもよい。このような突起を設けると、押圧部材１５０でメタルスプリング１４０の中央部１４２を押圧し易くなる。 In the above description, the bottom surface of the base 151 of the pressing member 150 is flat, but a protrusion may be provided at the center of the bottom surface of the base 151. Providing such a protrusion makes it easier for the pressing member 150 to press the central portion 142 of the metal spring 140.
　以上、本発明の例示的な実施の形態のプッシュスイッチについて説明したが、本発明は、具体的に開示された実施の形態に限定されるものではなく、特許請求の範囲から逸脱することなく、種々の変形や変更が可能である。 Although the push switch according to the exemplary embodiment of the present invention has been described above, the present invention is not limited to the specifically disclosed embodiment, without departing from the scope of the claims, Various modifications and changes are possible.
　なお、本国際出願は、２０１８年１１月２０日に出願した日本国特許出願２０１８－２１７４３４に基づく優先権を主張するものであり、その全内容は本国際出願にここでの参照により援用されるものとする。 This international application claims priority based on Japanese Patent Application 2018-217434 filed on Nov. 20, 2018, the entire contents of which are incorporated herein by reference. I shall.
　１００　プッシュスイッチ
　１１０　筐体
　１２０Ａ、１２０Ｂ　金属プレート
　１３０Ａ　メタルコンタクト
　１３０Ｂ、１３０Ｃ　リーフスプリング
　１４０　メタルスプリング
　１５０　押圧部材
　１６０　フレーム 100 push switch 110 housing 120A, 120B metal plate 130A metal contact 130B, 130C leaf spring 140 metal spring 150 pressing member 160 frame

Claims (8)

  1. 　開口部と、前記開口部に連通する収納部とを有する筐体と、
    　前記筐体に取り付けられ、前記収納部の内部に配置される固定接点部材と、
    　前記収納部の内部で前記固定接点部材よりも前記開口部側に配置され、前記開口部側にドーム状に突出し、反転動作可能なドーム部を有する可動接点部材と、
    　前記可動接点部材に対して前記固定接点部材とは反対側に設けられ、前記可動接点部材の反転動作方向に弾性変形可能な板ばねと、
    　前記開口部から突出し、前記板ばねを介して前記可動接点部材を前記固定接点部材側に押圧可能な硬質材料製の押圧部材と
    　を含む、プッシュスイッチ。     A housing having an opening and a storage portion communicating with the opening,
    A fixed contact member attached to the housing and arranged inside the storage unit;
    A movable contact member having a dome portion that is arranged inside the storage portion closer to the opening than the fixed contact member, protrudes in a dome shape toward the opening, and can be reversed.
    A leaf spring provided on the side opposite to the fixed contact member with respect to the movable contact member, and elastically deformable in the reversing operation direction of the movable contact member;
    A push switch made of a hard material that protrudes from the opening and can press the movable contact member toward the fixed contact member via the leaf spring.
  2. 　前記板ばねは、反転動作しない板ばねである、請求項１記載のプッシュスイッチ。 The push switch according to claim 1, wherein the leaf spring is a leaf spring that does not perform a reversing operation.
  3. 　前記板ばねは、
    　本体部と、
    　前記本体部から平面視で外側に延在し、前記本体部に対して弾性変形する複数の脚部と
    　を有する、請求項１又は２記載のプッシュスイッチ。     The leaf spring is
    Body part,
    The push switch according to claim 1 or 2, further comprising a plurality of legs extending outward from the main body in a plan view and elastically deforming with respect to the main body.
  4. 　前記複数の脚部は、前記押圧部材が押圧されていない初期位置にある状態で、前記可動接点部材に係合しており、前記押圧部材が押圧されることによって弾性変形する、請求項３記載のプッシュスイッチ。 The said several leg part is engaging with the said movable contact member in the state in which the said pressing member is in the initial position which is not pressed, and is elastically deformed by pressing the said pressing member. Push switch.
  5. 　前記複数の脚部は、側面視で前記本体部から前記可動接点部材に向かって斜め方向に延在する、請求項３又は４記載のプッシュスイッチ。 The push switch according to claim 3 or 4, wherein the plurality of legs extend obliquely from the body toward the movable contact member in a side view.
  6. 　前記収納部は平面視で矩形状であり、
    　前記複数の脚部は４本あり、
    　前記４本の脚部は、それぞれ、平面視で前記収納部の４つの角部に向かって延在する、請求項３乃至５のいずれか一項記載のプッシュスイッチ。     The storage portion has a rectangular shape in a plan view,
    The plurality of legs are four,
    The push switch according to any one of claims 3 to 5, wherein each of the four legs extends toward four corners of the storage section in a plan view.
  7. 　前記収納部は平面視で長方形であり、
    　前記４本の脚部は、それぞれ、平面視で前記収納部の４つの角部まで延在する、請求項６記載のプッシュスイッチ。     The storage portion is rectangular in plan view,
    The push switch according to claim 6, wherein each of the four legs extends to four corners of the storage portion in a plan view.
  8. 　前記複数の脚部は、先端側で前記可動接点部材の面が前記可動接点部材側に突出するように折り曲げられる折り曲げ部、又は、先端側で前記可動接点部材の面が前記可動接点部材側に突出するように湾曲される湾曲部を有し、
    　前記折り曲げ部又は前記湾曲部が前記可動接点部材に係合する、請求項３乃至７のいずれか一項記載のプッシュスイッチ。     The plurality of legs is a bent portion that is bent so that the surface of the movable contact member projects toward the movable contact member side at the tip end side, or the surface of the movable contact member at the tip end side faces the movable contact member side. Has a curved portion that is curved so as to protrude,
    The push switch according to claim 3, wherein the bent portion or the curved portion engages with the movable contact member.
PCT/JP2019/041341 2018-11-20 2019-10-21 Push switch WO2020105339A1 (en)

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Citations (7)

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JPS54119675U (en) * 1978-02-10 1979-08-22
JPS55102724U (en) * 1979-01-13 1980-07-17
JPH0289737U (en) * 1988-10-05 1990-07-17
JPH03214521A (en) * 1990-01-17 1991-09-19 Japan Aviation Electron Ind Ltd Bipolar single throw tactile switch
JPH11162286A (en) * 1997-10-29 1999-06-18 C & K Components Inc Switch assembly
JP2005100714A (en) * 2003-09-22 2005-04-14 Shinmei Electric Co Ltd Two-step tactile switch
JP2012230926A (en) * 2012-08-30 2012-11-22 Panasonic Corp Push switch

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JPS54119678U (en) * 1978-02-10 1979-08-22
JP2001118457A (en) 1999-10-20 2001-04-27 Otax Co Ltd Pushbutton switch
CN200986869Y (en) 2006-12-01 2007-12-05 富士康(昆山)电脑接插件有限公司 Push-button switch
JP5470521B2 (en) 2010-06-08 2014-04-16 アルプス電気株式会社 Switch device
CN202042403U (en) 2011-02-28 2011-11-16 珠海市惟达电子有限公司 Push switch
CN204884966U (en) 2015-07-22 2015-12-16 珠海市惟达电子有限公司 Push switch

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54119675U (en) * 1978-02-10 1979-08-22
JPS55102724U (en) * 1979-01-13 1980-07-17
JPH0289737U (en) * 1988-10-05 1990-07-17
JPH03214521A (en) * 1990-01-17 1991-09-19 Japan Aviation Electron Ind Ltd Bipolar single throw tactile switch
JPH11162286A (en) * 1997-10-29 1999-06-18 C & K Components Inc Switch assembly
JP2005100714A (en) * 2003-09-22 2005-04-14 Shinmei Electric Co Ltd Two-step tactile switch
JP2012230926A (en) * 2012-08-30 2012-11-22 Panasonic Corp Push switch

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