CN110651345A - Push-button switch - Google Patents
Push-button switch Download PDFInfo
- Publication number
- CN110651345A CN110651345A CN201880033207.5A CN201880033207A CN110651345A CN 110651345 A CN110651345 A CN 110651345A CN 201880033207 A CN201880033207 A CN 201880033207A CN 110651345 A CN110651345 A CN 110651345A
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- CN
- China
- Prior art keywords
- coil spring
- base
- protrusion
- push button
- button
- Prior art date
- Legal status (The legal status 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 status listed.)
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Classifications
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- 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
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- 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
- H01H13/12—Movable parts; Contacts mounted thereon
- H01H13/14—Operating parts, e.g. push-button
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- 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
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
Abstract
The invention provides a key switch. The key switch has: the push button switch comprises a base (1), a push button (3) which is installed on the base (1) in a manner that the push button can be connected and separated, a spiral spring (4) which is arranged between the base (1) and the push button (3) and applies force to the push button (3) in a direction that the push button is separated from the base (1), and a protrusion part (100) which is arranged between the base (1) and the spiral spring (4) or between the push button (3) and the spiral spring (4) and supports the end part of the spiral spring (4) relative to the base (1) or the push button (3) in a swinging manner.
Description
Technical Field
The present disclosure relates to a key switch.
Background
Documents of the prior art
Patent document
Patent document 1: chinese patent application publication No. 104851727 specification
Disclosure of Invention
Technical problem to be solved by the invention
However, when the key switch is applied to a keyboard or the like and used as an operation key of game software, the key switch may be flipped up from a pressed state. In this case, since the coil spring expands and contracts only in the pressing direction of the push switch, the vibration is not easily attenuated, which causes noise.
An object of the present disclosure is to provide a push switch capable of reducing vibration of a coil spring used in advance and effectively suppressing chattering.
Technical solution for solving technical problem
The present disclosure provides, as an example of a method for solving the problems, a key switch having:
a base;
a button which is installed to be attachable to and detachable from the base;
a coil spring disposed between the base and the button, and biasing the button in a direction of separating from the base;
and a protrusion portion disposed between the base or the button and the coil spring, and configured to support an end portion of the coil spring with respect to the base or the button in a swingable manner.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the push switch of the present disclosure, even if the push button is projected in the separating direction by the biasing force of the coil spring acting when the finger is separated from the pushed push button, the coil spring acts in the direction inclined with respect to the center axis as well as the center axial direction because the push button has the protruding portion that swingably supports the end portion of the coil spring. As a result, the vibration of the coil spring can be attenuated at an early stage, and chattering can be effectively suppressed.
Drawings
Fig. 1 is a perspective view of a push switch according to the present embodiment.
Fig. 2 is a perspective view showing a state where the button is removed from fig. 1.
Fig. 3 is an exploded perspective view of the push switch shown in fig. 1.
Fig. 4A is a perspective view of the base of fig. 3.
Fig. 4B is a perspective view of fig. 4A as viewed from the lower side.
Fig. 5A is a perspective view of the light guide of fig. 3 as viewed from above.
Fig. 5B is a perspective view of the light guide of fig. 5A viewed from the lower side.
Fig. 6A is a perspective view of the push button of fig. 3 as viewed from above.
Fig. 6B is a perspective view of the button of fig. 6A viewed from the lower side.
Fig. 7A is a perspective view of the fixed contact of fig. 3.
Fig. 7B is a perspective view of the fixed contact strip of fig. 7A from a different angle.
Fig. 8A is a perspective view of the movable contact piece of fig. 3.
Fig. 8B is a perspective view of the movable contact piece of fig. 8A viewed from a different angle.
Fig. 9A is a perspective view of the slider of fig. 3.
Fig. 9B is a perspective view of the slider of fig. 9A from a different angle.
Fig. 10 is a sectional view taken along line X-X of fig. 1.
Fig. 11 is a graph comparing changes in vibration of the coil spring in the push switch in which the push button having the protrusion according to the present embodiment is disposed and the push switch having no protrusion.
Fig. 12 is a perspective view of a light guide according to another embodiment.
Fig. 13 is a perspective view of the button of the other embodiment as viewed from the lower side.
Fig. 14 is a perspective view of a light guide according to another embodiment.
Fig. 15 is a perspective view of a coil spring according to another embodiment.
Detailed Description
One embodiment of the present disclosure is described below with reference to the drawings. In the following description, although terms (for example, terms including "upper", "lower", "side", and "end") indicating a designated direction and position are used as necessary, the terms are used for convenience in understanding the present disclosure with reference to the drawings, and the technical scope of the present disclosure is not defined by the meaning of the terms. The following description is merely exemplary in nature and is not intended to limit the present disclosure, the applicable devices, or the uses thereof. In addition, the drawings are schematic views, and the ratio of the dimensions and the like are different from the actual case.
Fig. 1 is a perspective view showing the entire push switch of the present embodiment. Fig. 2 is a perspective view showing a state where the push button 3 is removed from fig. 1. Fig. 3 is an exploded perspective view of the key switch of fig. 1. The key switch has: a base 1, a push button 3, a coil spring 4, a contact opening and closing mechanism 5, a slider 6, and a lifting mechanism 7. The push button 3 is attached to the base 1 so as to be able to be attached to and detached from (i.e., attachable to and detachable from) the base.
As shown in fig. 4A and 4B, the base 1 is made of, for example, a synthetic resin material, and has a bottom portion 8 and a square frame portion 9. The light guide 2, which is an example of a light guide member, is provided on the bottom portion 8.
Further, the bottom portion 8 is formed with an opening 10 having a circular shape in plan view. An annular locking receiving portion 11 is formed in the inner peripheral surface of the opening 10 at the center in the vertical direction (i.e., the direction perpendicular to the bottom 8 of the base 1 and the direction in which the push button 3 is connected to and disconnected from the base 1). The locking receiving portion 11 is locked with a locking claw 29a of the light guide 2 as described later.
A first mounting seat 12 and a second mounting seat 13 are formed in the vicinity of the opening 10. A first locking groove 14 extending in the vertical direction is formed in a side surface of the first mounting seat 12. The bottom portion 8 is formed with a first terminal hole 15 continuous with the first locking groove 14 and communicating with the lower surface. The first mounting seat 12 has a first locking protrusion 16 formed of an arc surface having a convex upper surface. The second mounting base 13 has the same configuration as the first mounting base 12, and includes a second locking groove 17 and a second locking protrusion 18, and the bottom portion 8 is formed with a second terminal hole 19 communicating with the second locking groove 17. The fixed contact piece 41 is fixed to the first mounting base 12, and the movable contact piece 42 is fixed to the second mounting base 13. A recessed portion 20a having a rectangular shape in plan view is formed in the central portion of the upper surface of one side portion of the bottom portion 8. Further, recessed portions 20b are formed at four corners of the bottom portion 8. When the push button 3 is pushed, the lower end of the contact portion 36 of the push button 3 described later comes into contact with the bottom surface of the recessed portion 20b, and the push button 3 is restricted from further movement.
The rectangular frame portion 9 is formed of two sets of side walls 21a, 21b facing each other, and has a flange portion 22 formed on the outer side thereof. The flange portion 22 is applied to support the lifting mechanism 7 described later. An ejection prevention wall 23 is formed outside the flange 22 on the outside of the opposing side wall 21 a. The push-out prevention wall 23 prevents the first arm portion 67 and the second arm portion 68 from being pushed out sideways. A recess 24 is formed in the center of the outer surface of the opposing side wall 21 a. The upper half of the side wall 21a of the recess 24 is formed by a narrow groove 24a, and the lower half is formed by an escape recess 24b wider than the groove 24 a. The width of the groove 24a is set to a width that allows insertion of a first arm 67 and a second arm 68, which will be described later, in a folded state.
As shown in fig. 5A and 5B, the light guide 2 is made of, for example, a light-transmitting synthetic resin material, and includes: a truncated cone-shaped light guide body 25, and an elastic body receiving portion 26 radially protruding from the lower end of the light guide body 25.
A plurality of convex lenses 25a are formed on the upper surface of the light guide body 25. The convex lens 25a causes Light from an LED (Light Emitting Diode) 25B (see fig. 5B) as a Light source to diverge.
The elastic body receiving portion 26 is flange-shaped and is composed of a receiving portion main body 27 of an upper half portion and a cylindrical body 28 of a lower half portion. Further, the elastic body receiving portion 26 has notches 26a formed at three equally spaced positions in the circumferential direction, and the notches have claw portions 29 formed therein, respectively. The receiving portion main body 27 and the tubular body 28 are divided into three arc-shaped portions by the notches 26 a. The receiving portion main body 27 has an outer diameter larger than the opening 10 of the base 1, and a lower surface thereof abuts on an upper surface of the bottom portion 8. The outer surface of the cylindrical body 28 abuts against the inner surface of the opening 10, and the light guide 2 is positioned in the radial direction with respect to the base 1. A space surrounded by the lower surface of the receiving portion main body 27 and the inner surface of the cylindrical body 28 serves as a recess 30 for disposing the LED25b, not shown. The claw portion 29 extends downward in the same manner as the cylindrical body 28, and a locking claw 29a protruding to the outer diameter side is formed at the tip end portion. The locking claw 29a is locked to a locking receiving portion 11 formed in the opening 10 of the base 1, and prevents the light guide 2 from falling off from the opening 10 to the upper side.
As shown in fig. 6A and 6B, the push button 3 is made of, for example, a synthetic resin material and has a rectangular shape in plan view. The button 3 has: a flat plate portion 31 having a rectangular shape in plan view, side wall portions 32 extending downward from two opposing sides of the flat plate portion 31, and extending portions 33a, 33b extending laterally from the remaining two opposing sides of the flat plate portion 31.
A substantially cylindrical guide portion 34 is formed in the center of the lower surface of the flat plate portion 31. A pair of projections 100 (i.e., a first projection 101 and a second projection 102) extending in the outer diameter direction of the guide portion 34 are formed. The first projection 101 and the second projection 102 are arranged on the same straight line passing through the center of the guide portion 34 (i.e., at positions separated by 180 ° in the circumferential direction with respect to the center of the guide portion 34). Further, the portions of the first projection 101 and the second projection 102 that abut against the end portions of the coil spring 4 are mountain-shaped or U-shaped, for example, semicircular in cross section, and the contact area between both can be suppressed. The protrusion 100 is set so that the protruding dimension from the flat plate portion 31 is smaller than the guide portion 34 but larger than the linear diameter (a straight line) of the coil spring 4. Thus, in a plan view, any position of the upper end portion of the coil spring 4 (i.e., the last turn of the coil spring 4) can be reliably brought into contact with the first projection 101 and the second projection 102, and the end portion of the coil spring 4 can be swingably supported by the first projection 101 and the second projection 102.
The first projection 101 and the second projection 102 are not necessarily arranged on the same straight line with a phase difference of 180 ° with respect to the center of the coil spring 4, and may be arranged offset in the circumferential direction. The first projection 101 and the second projection 102 are not limited to a semicircular shape in cross section, but include various shapes in cross section such as a triangular shape in cross section and the like that can reduce the contact area with the end of the coil spring 4. The key point is that the first projection 101 and the second projection 102 are not unbalanced when the end of the coil spring 4 is pressed against the projection 100, and the coil spring 4 can be bent not in the center axis direction but in the direction intersecting the center axis.
Further, a guide wall 35 is provided along three sides on the lower surface of the flat plate portion 31. The opposite walls on both sides of the guide wall 35 are formed with abutting portions 36 protruding from the other portions at both end portions, and protrude inward except for both end portions. In addition, guide grooves 36a for guiding the slider 6 are formed in the opposing portions of the abutting portions 36 located at both end portions of the guide wall 35, respectively. One side wall constituting the guide groove 36a is cut away except for upper and lower end portions, and a lifting protrusion 37 is formed at the lower end portion. The lifting protrusion 37 includes: a lower inclined surface 37a inclined upward gradually, and an upper flat surface 37 b.
The side wall portion 32 is further formed with bearing holes 38 at both end portions extending downward. A first shaft portion 71 (shown in fig. 3) of a first arm portion 67 and a second arm portion 68 described later is rotatably and slidably supported in each bearing hole 38.
Returning to fig. 3, the wire of the coil spring 4 is disposed in a spiral shape between the elastic body receiving portion 26 of the light guide 2 and the guide portion 34 of the push button 3, and biases the push button 3 upward with respect to the base 1.
The contact opening/closing mechanism 5 has a fixed contact piece 41 and a movable contact piece 42, and is formed by pressing and bending a flat copper alloy.
As shown in fig. 7A and 7B, the fixed contact 41 includes: a first flat portion 43, a fixed terminal portion 44 extending downward from the center portion of the lower edge of the first flat portion 43, a second flat portion 45 extending perpendicularly from the lower edge on one end side of the first flat portion 43, a third flat portion 46 extending perpendicularly from one end edge of the second flat portion 45, a fixed contact 47 provided on the third flat portion 46, and a fourth flat portion 48 extending perpendicularly from the other end edge of the first flat portion 43 and facing the third flat portion 46. A first locking protrusion 49 reaching the first flat surface 43 is formed at the center of the fixed terminal portion 44. The first locking projection 49 is locked to the first locking groove 14 formed in the first mounting seat 12 of the base 1. The fixing terminal portion 44 is pressed into the first terminal hole 15 and protrudes from the lower surface of the bottom portion 8. The fourth flat surface portion 48 is formed with a first locking recess 50 cut out in an arc shape at the center of the lower edge. The first locking recess 50 is locked by the first locking protrusion 16 of the first mounting seat 12.
As shown in fig. 8A and 8B, the movable contact piece 42 includes: a first flat section 51, a movable terminal section 52 extending downward from one end side lower edge of the first flat section 51, a second flat section 53 extending orthogonally from one end of the first flat section 51, and a third flat section 54 extending orthogonally from the other end of the first flat section 51 and partially facing the second flat section 53. A second locking projection 55 reaching the first flat portion 51 is formed at the center of the movable terminal portion 52. The second flat surface portion 53 is formed with a second locking recess 56 cut out in an arc shape at the center of the lower edge. The second locking recess 56 is locked by the second locking protrusion 18 of the first mounting seat 12. The third flat surface portion 54 has a protruding piece 57 with a cross section bent substantially in a C-shape formed at the center of the upper edge. The projecting piece 57 is pressed by a pressing portion 59 of the slider 6 described later, and elastically deforms the third flat surface portion 54 (and thus the first flat surface portion 51). A movable contact 58 is provided on the outer surface of the front end of the third flat surface portion 54.
As shown in fig. 9A and 9B, the slider 6 is a member formed by processing a synthetic resin material into a flat plate shape. The slider 6 has a pressing portion 59 at a central portion. The pressing portion 59 has: a first inclined surface 60 which gradually protrudes from the lower side than the upper end by a predetermined dimension, and a concave curved surface 61 which is continuous with the first inclined surface 60 and in which the center of the protruding portion is slightly recessed. The pressing portion 59 has a second inclined surface 62 whose protruding dimension on the lower end side of the protruding portion is gradually reduced.
The slider 6 has guided projections 64 at both ends. The guided projection 64 is formed so that the outer surface center portion of the flat portion 65 provided at both end portions of the slider 6 is divided into two right and left portions. The guided projection 64 is inserted into a guide groove 36a formed in the push button 3 and is guided so as to be movable up and down. A projection 66 to be lifted is formed on the lower side of the flat portion 65 divided into two by the projection 64 to be guided. The raised portion 66 has an upper surface formed by an inclined surface 66a that gradually protrudes downward, and a lower surface formed by a flat surface 66 b. The flat surface 37b of the lifting projection 37 abuts against the flat surface 66b of the lifted projection 66, and is lifted together when the push button 3 moves upward.
Returning to fig. 3, the lifting mechanism 7 has a first arm portion 67 and a second arm portion 68. The first arm portion 67 and the second arm portion 68 have substantially the same shape, and each have a shaft 69 and a pair of arm portions 70 extending from both ends thereof. First shaft portions 71 are formed at both ends of each shaft body 69. A second shaft portion 72 and a first protrusion 73 protruding inward are formed on the tip end side of one arm portion 70. A bearing hole 74 through which the second shaft portion 72 is rotatably inserted and a second protrusion 75 protruding inward are formed on the tip end side of the other arm portion 70.
The first arm portion 67 and the second arm portion 68 are connected by inserting the second shaft portion 72 of the first arm portion 67 into the bearing hole 74 of the second arm portion 68, and inserting the second shaft portion 72 of the second arm portion 68 into the bearing hole 74 of the first arm portion 67. When the first arm portion 67 and the second arm portion 68 connected to each other are folded, the first projection 73 and the second projection 75 abut on the upper surface constituting the escape recess 24b and are prevented from falling off the base 1 by inserting the connection portion into the groove portion 24a of the base 1 and extending the connection portion in the escape recess 24 b. The first arm portion 67 and the second arm portion 68 connected to each other are connected to the push button 3 by inserting the first shaft portion 71 into the bearing hole 38 of the push button 3. The first shaft portion 71 of the push button 3 abuts against the inner edge of the bearing hole 38, and movement in the protruding direction is restricted. The push button 3 is restricted from moving in the pressing direction by the lower end of the abutting portion 36 abutting against the bottom surface of the recess 20b of the base 1.
Next, an assembly method of the key switch having the above-described configuration will be described.
The light guide 2 is disposed in the opening 10 of the bottom portion 8. The cylindrical body 28 of the light guide 2 is inserted into the opening 10, and the flange 22 is brought into contact with the upper surface of the bottom 8. Thereby, the locking claws 29a of the claw portions 29 are locked to the locking receiving portions 11 of the opening portions 10, and the base 1 having the light guide body 2 is obtained.
The fixed contact 41 is attached to the first mounting base 12 of the base 1, and the movable contact 42 is attached to the second mounting base 13. The fixed contact piece 41 is fixed to the base 1 by pressing the fixed terminal portion 44 into the first terminal hole 15 of the base 1, locking the first locking protrusion 49 to the first locking groove 14 of the first mounting seat 12, and locking the first locking recess 50 to the first locking protrusion 16 of the first mounting seat 12. The movable contact piece 42 is fixed to the base 1 by pressing the movable terminal portion 52 into the second terminal hole 19 of the base 1, locking the second locking protrusion 55 to the second locking groove 17 of the second mounting base 13, and locking the second locking recess 56 to the second locking protrusion 18 of the second mounting base 13. In this state, the movable contact 58 is arranged to be closable opposite to the fixed contact 47.
The second shaft portion 72 of the first arm portion 67 is inserted into the bearing hole 74 of the second arm portion 68, and the second shaft portion 72 of the second arm portion 68 is inserted into the bearing hole 74 of the first arm portion 67, whereby the first arm portion 67 and the second arm portion 68 are coupled. Then, the first arm portion 67 and the second arm portion 68 are inserted into the recess 30 via the groove portion 24a of the base 1 in a folded state, and are stretched in a V shape. Further, the guided projection 64 of the slider 6 is guided toward the guide groove 36 of the push button 3. In this state, the first shaft portions 71 of the first arm portion 67 and the second arm portion 68 are inserted into the bearing holes 38 of the push button 3. Thus, the push button 3 is biased in the protruding direction by the biasing force of the coil spring 4 disposed between the push button and the light guide 2. At this time, as shown in fig. 10, the upper end of the coil spring 4 abuts against the first projection 101 and the second projection 102 formed on the push button 3. Each of the first projection 101 and the second projection 102 is formed in a semicircular shape in cross section having a curved surface facing the upper end of the coil spring 4, and the curved surface is in point contact with the upper end of the coil spring 4. Therefore, when the push button 3 is pushed and the pushed state is released, the coil spring 4 applies a biasing force to the push button 3 not only in the center axis direction but also in a direction inclined to the center axis. The first shaft portion 71 of the first arm portion 67 and the second arm portion 68 abuts against the inner edge of the bearing hole 38, and the movement of the push button 3 in the protruding direction is restricted.
The push switch assembled in this manner is mounted on a printed circuit board (not shown) on which the LED25b is actually mounted. In the attachment of the push switch, the LED25b is fitted into the concave portion 30 of the light guide 2 located on the lower surface of the base 1. A key top, not shown, is attached to the button 3, and serves as a key of the keyboard.
Next, the operation of the key switch having the above-described configuration will be described.
In an initial state where the key top, not shown, is not pressed, the push button 3 is biased upward by the biasing force of the coil spring 4, and the first shaft portions 71 of the first arm portion 67 and the second arm portion 68 abut against the inner edges of the bearing holes 38 of the second arm portion 68 and the first arm portion 67. Thereby, the push button 3 is positioned at the protruding position. In this state, the projecting piece 57 of the movable contact piece 42 is pressed by the pressing portion 59 of the slider 6, and the movable contact 58 is separated from the fixed contact 47 of the fixed contact piece 41.
When the push button 3 is pushed down via the key top against the biasing force of the coil spring 4, the slider 6 also moves downward together. At this time, the protruding piece 57 of the movable contact piece 42 changes the pressure contact position from the concave curved surface 61 of the slider 6 to the first inclined surface 60. Thereby, the elastic energy accumulated in the third flat surface portion 46 of the movable contact piece 42 is converted into a force that biases the slider 6 downward. As a result, the slider 6 moves downward independently of the push button 3, and the flat surface 66b at the lower end of the projection 66 to be lifted collides with the flat surface 37b of the projection 37 for lifting of the push button 3, thereby generating a sound. Since the slider 6 does not fall by its own weight alone, but also acts with the elastic force from the movable contact piece 42, the generated sound can be increased. Therefore, the user can clearly recognize that the pressing operation is properly performed as long as the keyboard has the key switch having the above-described configuration. In addition, when the keyboard is applied to a game or the like, sufficient sound can be generated by the pressing operation to suit the use situation. The movable contact 58 is closed to the fixed contact 47 by extending the elastically deformed movable contact piece 42 straight to return to the shape.
When the pressing operation of the push button 3 is released, the push button 3 moves upward by the urging force of the coil spring 4. When the push button 3 moves upward, the urging force of the coil spring 4 acts on the push button 3 via the first projection 101 and the second projection 102. Each of the first projection 101 and the second projection 102 is formed in a semicircular shape in cross section having a curved surface facing the coil spring 4, and the curved surface is in point contact with the upper end portion of the coil spring 4. Therefore, the upper end portion of the coil spring 4 is inclined, and applies a force to the push button 3 not only in the direction of the center axis CL (shown in fig. 10) but also in the direction intersecting the center axis CL, thereby vibrating the push button. As a result, the elastic energy accumulated in the coil spring 4 can be consumed at an early stage, and the generated vibration can be rapidly attenuated. That is, the rattling of the coil spring 4 can be suppressed, and the generation of noise can be prevented.
In this way, the push button 3 returns the first shaft portion 71 of the first arm portion 67 and the second arm portion 68 to the initial position by abutting against the inner edge of the bearing hole 38. The slider 6 is lifted by the flat surface 37b of the lifting projection 37 formed on the push button 3 coming into contact with the flat surface 66b of the lifted projection 66, and the pressing portion 59 presses the projecting piece 57 of the movable contact piece 42 to elastically deform the third flat portion 54 (and thus the first flat portion 51). Thereby, the movable contact 58 is separated from the fixed contact 47, and the initial state is restored.
Fig. 11 is a graph showing changes in the vibration of the coil spring 4 when the finger is separated from the state of pressing the push button 3. In the figure, a solid line shows a change in vibration of the coil spring 4 in the push button switch having the configuration of the present embodiment, and a broken line shows a change in vibration of the coil spring 4 in the push button switch having the push button 3 without the protrusion 100. As is clear from the graph, in the push switch of the present embodiment, the vibration can be sufficiently damped within 0.1 second after the finger is separated from the push button 3. On the other hand, in the push button switch having the push button 3 without the protrusion 100, it takes about three times to about 0.3 seconds to sufficiently attenuate the vibration of the coil spring 4.
The present disclosure is not limited to the configurations described in the above embodiments, and various modifications are possible.
Although the pair of protrusions 100 is formed in the push button 3 in the above embodiment, the following configuration is also possible.
In fig. 12, a pair of protrusions 110 are formed on the light guide 2 of the base 1. That is, the third protrusion 111 and the fourth protrusion 112 are provided on the upper surface of the receiving portion main body 27 of the elastic body receiving portion 26 so as to be positioned on the same straight line passing through the center of the light guide body 2. The projection 110 can also tilt the biasing force of the coil spring 4 acting on the push button 3 with respect to the center axial direction thereof, similarly to the projection 100 provided on the push button 3, and can suppress the rattling of the coil spring 4. In this case, the protrusion 100 may not be formed on the button 3 side. When the protrusion 100 is formed on the push button 3 side, the circumferential position in a plan view is preferably shifted between the push button 3 side and the base 1 side. This makes it possible to make the directions of bending and twisting by the protrusions 100 and 110 different between the upper end side and the lower end side of the coil spring 4. As a result, the vibration of the coil spring 4 can be further rapidly attenuated.
The structure of the light guide 2 shown in fig. 12 is slightly different from that of the above embodiment. That is, a recess, not shown, is formed in the lower surface of the light guide 2. The concave portion is composed of a conical surface inclined toward the center and a concave surface in the center portion. An annular projection 113 is formed on the outer periphery of the upper surface of the light guide 2. With the above configuration, the entire flat plate portion 31 of the push button 3 can be reliably irradiated with light from the LED without being diffused to the surroundings. The protrusion 110 formed on the light guide 2 may be applied to the structure shown in fig. 5A and 5B.
In the above-described embodiment, the two protrusions 101, 102, 111, and 112 constitute the protrusions 100 and 110, respectively, but one protrusion (only protrusion 101) may be provided on the push button 3 side as shown in fig. 13, or one protrusion (only protrusion 111) may be provided on the base 1 side as shown in fig. 14. Further, three or more projections may be provided. Further, the protrusion may be formed on both the button 3 side and the base 1 side, or may be formed on only one of them. In addition, the number of projections may be changed between the button 3 side and the base 1 side. When a plurality of projections are provided on the push button 3 side or the base 1 side, it is preferable that the projections on the respective sides have different heights. Thus, as in the above-described embodiment, the biasing force of the coil spring 4 can be dispersed not only to both sides of the protrusions but also between the protrusions. Therefore, the vibration of the coil spring 4 can be further effectively damped.
Although the protrusion 110 is formed in the light guide 2 of the base 1 in the above embodiment, it may be formed in the bottom 8 of the base 1.
In the above embodiment, the protrusion 100 is provided on the push button 3 and the protrusion 110 is provided on the base 1 side, but as shown in fig. 15, the protrusion 120 may be provided on the coil spring 4. Here, the first projection 121 and the second projection 122 are formed at positions 180 ° apart from the central axis at the upper end portion of the coil spring 4. However, since it is difficult to form a protrusion on the coil spring 4 itself, an accessory having a protrusion may be separately attached to the coil spring 4. In this case, the accessory is formed in a cylindrical shape from a rubber or synthetic resin material, and a protrusion is provided on the outer peripheral surface thereof, and the wire rod on one end side of the coil spring 4 is press-fitted into the cylindrical portion.
Various embodiments of the present disclosure are described in detail above with reference to the drawings, and finally, various aspects of the present disclosure are described. In the following description, a reference sign is added as an example.
In a first aspect of the present disclosure, a push switch includes:
a base 1;
a button 3 attached to and detached from the base 1;
a coil spring 4 disposed between the base 1 and the push button 3, and biasing the push button 3 in a direction of separating from the base 1;
and a protrusion 100 disposed between the base 1 or the push button 3 and the coil spring 4, and configured to support an end of the coil spring 4 with respect to the base 1 or the push button 3 in a swingable manner.
With this configuration, the protrusion 100 is brought into contact with the end portion of the coil spring 4 and swung, and the coil spring 4 can be vibrated in directions other than the direction along the center axis. This can dissipate the elastic energy accumulated in the coil spring 4 at an early stage, and can quickly damp the vibration. That is, the rattling of the coil spring 4 can be effectively suppressed.
In the push switch of the second mode of the present disclosure,
the projection 100 is composed of a pair of projections 101 and 102 provided at positions facing the central axis of the coil spring 4.
With this configuration, the end of the coil spring 4 can be brought into contact with the first projection 101 and the second projection 102, and the coil spring can be reliably swung, so that rattling of the coil spring 4 can be more effectively suppressed.
In the push switch of the third mode of the present disclosure,
the height of the projection 100 is larger than the wire diameter of the coil spring 4.
With this configuration, the projection 100 can be reliably brought into contact with an arbitrary position at one end of the coil spring 4.
In the push switch of the fourth mode of the present disclosure,
the protrusion 100 is provided between the push button 3 and the coil spring 4, and is provided on the push button 3.
With this configuration, the projection 100 can be easily provided without increasing the number of components.
In the push switch of the fifth mode of the present disclosure,
the protrusion 100 is provided on the base 1 between the base 1 and the coil spring 4.
With this configuration, the projection 100 can be easily provided without increasing the number of components.
In the push switch of the sixth mode of the present disclosure,
the protrusion 100 is composed of protrusions 101 and 102 provided between the push button 3 and the coil spring 4, and protrusions 111 and 112 provided between the base 1 and the coil spring 4, and the positions of the protrusions 101, 102, 111, and 112 are different from each other around the central axis of the coil spring 4.
With this configuration, the direction in which the end portion of the coil spring 4 swings can be made different between the push button 3 side and the base 1 side, and the rattling of the coil spring 4 can be further effectively suppressed.
In the push switch of the seventh aspect of the present disclosure,
the protrusion 100 is provided in the coil spring 4.
In the push switch of the eighth aspect of the present disclosure,
the projection 100 is composed of a plurality of projections 101, 102, 111, and 112, and the heights of the plurality of projections 101, 102, 111, and 112 are respectively larger than the wire diameter of the coil spring 4 and different from each other.
With this configuration, the end portions of the coil spring 4 are brought into contact with the plurality of projections 101, 102, 111, and 112 having different heights, whereby the coil spring 4 can be reliably swung. Therefore, the elastic energy accumulated in the coil spring 4 is consumed at an early stage, and the vibration can be damped.
In the push switch of the ninth mode of the present disclosure,
the coil spring 4 is disposed outside the light guide member 2 provided between the push button 3 and the base 1.
With this configuration, only the light guide member 2 can be provided in the region through which light from the light source passes, and chatter vibration can be suppressed without impairing the light guiding effect.
It should be noted that any of the various embodiments or modifications can be appropriately combined to provide the effects of each. In addition, combinations of the embodiments, or combinations of the examples, or combinations of the embodiments and the examples may be made, and features in different embodiments or examples may also be combined with each other.
The present disclosure has been fully described in connection with the preferred embodiments with reference to the accompanying drawings, but it is apparent that various changes and modifications can be made by those skilled in the art. It should be understood that the above-described variations and modifications are also encompassed in the present disclosure without departing from the scope of the present disclosure as defined by the claims.
Industrial applicability
The key switch of the present disclosure can be applied to a keyboard and the like.
Description of the reference numerals
1, a base; 2, a light guide body; 3, a button; 4a coil spring; 5a contact opening and closing mechanism; 6, a sliding block; 7, a lifting mechanism; 8, the bottom; 9a square frame portion; 10 an opening part; 11 a locking receiving part; 12 a first mounting seat; 13 a second mounting seat; 14 a first locking groove; 15 a first terminal aperture; 16 first locking protrusion; 17 a second locking groove; 18 second locking protrusion; 19 a second terminal hole; 20a, 20b recess; 21a, 21b side walls; 22 a flange portion; 23 prevent pushing out of the wall; 24a recess; 25a light guiding body; 26 an elastic body receiving portion; 27 a receiving portion main body; 28 a cylindrical body; 29 claw parts; 30 concave parts; 31 a flat plate portion; 32 side wall portions; 33a, 33b extensions; 34 a guide part; 35 a guide wall; 36 an abutting portion; 36a guide groove; 37a lifting projection; 37a inclined surface; 38 bearing bore; 39 protrusions; 40 a support portion; 41 fixing the contact piece; 42 a movable contact piece; 43 a first planar portion; 44 a fixed terminal part; 45 a second planar portion; 46 a third planar portion; 47 a fixed contact; 48 a fourth flat portion; 49 a first locking projection; 50 a first latching recess; 51 a first planar portion; 52 a movable terminal part; 53 a second planar portion; 54 a third planar portion; 55 a second locking projection; 56 a second latching recess; 57 projecting piece; 58 a movable contact; 59 a pressing part; 60 a first inclined surface; 61 a concave curved surface; 62 a second inclined surface; 64 a guided protrusion; 65 flat portion; 66a raised portion; 67 a first arm portion; 68 a second arm portion; 69 a shaft body; 70 wrist part; 71 a first shaft portion; 72 a second shaft portion; 73 a first protrusion; 74 a bearing bore; 75 a second protrusion; 100, 110, 120 protrusions; 101, 111, 121 first protrusions; 102, 112, 122 second protrusion; 113 an annular projection.
Claims (9)
1. A push switch, comprising:
a base;
a button mounted attachably and detachably with respect to the base;
a coil spring disposed between the base and the button, and biasing the button in a direction of separating from the base;
and a protrusion disposed between the base or the button and the coil spring, and configured to support an end of the coil spring with respect to the base or the button in a swingable manner.
2. The key switch of claim 1,
the protrusion is formed of a pair of protrusions provided at positions facing the central axis of the coil spring.
3. Key switch according to claim 1 or 2,
the height of the protrusion is larger than the wire diameter of the coil spring.
4. Key switch according to any of claims 1 to 3,
the protrusion is provided to the button between the button and the coil spring.
5. Key switch according to any of claims 1 to 3,
the protrusion is provided on the base between the base and the coil spring.
6. Key switch according to any of claims 1 to 3,
the protrusion is composed of a protrusion provided between the push button and the coil spring, and a protrusion provided between the base and the coil spring, and positions of the protrusions are different from each other around a central axis of the coil spring.
7. Key switch according to any of claims 1 to 3,
the protrusion is provided to the coil spring.
8. Key switch according to any of claims 1 to 7,
the protrusion is formed of a plurality of protrusions having heights respectively larger than the wire diameter of the coil spring and different from each other.
9. Key switch according to any of claims 1 to 8,
the coil spring is disposed outside the light guide member provided between the button and the base.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017142045A JP2019021600A (en) | 2017-07-21 | 2017-07-21 | Push button switch |
| JP2017-142045 | 2017-07-21 | ||
| PCT/JP2018/023473 WO2019017135A1 (en) | 2017-07-21 | 2018-06-20 | Push-button switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110651345A true CN110651345A (en) | 2020-01-03 |
Family
ID=65015327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880033207.5A Withdrawn CN110651345A (en) | 2017-07-21 | 2018-06-20 | Push-button switch |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP2019021600A (en) |
| KR (1) | KR20190127837A (en) |
| CN (1) | CN110651345A (en) |
| TW (1) | TWI681428B (en) |
| WO (1) | WO2019017135A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI680478B (en) * | 2019-02-15 | 2019-12-21 | 致伸科技股份有限公司 | Keyboard device |
| TWI776704B (en) * | 2021-10-07 | 2022-09-01 | 和碩聯合科技股份有限公司 | Switch device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60170120A (en) * | 1984-02-14 | 1985-09-03 | キヤノン株式会社 | Keyboard |
| JPS59209219A (en) * | 1984-04-18 | 1984-11-27 | 松下電器産業株式会社 | Pushbutton uniut |
| JP4005766B2 (en) * | 2000-09-28 | 2007-11-14 | アルプス電気株式会社 | Switch device |
| JP4951446B2 (en) * | 2007-08-31 | 2012-06-13 | アルプス電気株式会社 | Push switch device |
| CN203085412U (en) * | 2013-01-17 | 2013-07-24 | 罗格朗(北京)电气有限公司 | Low noise switch button |
| JP5741739B1 (en) * | 2014-03-12 | 2015-07-01 | オムロン株式会社 | Illuminated switch and keyboard |
| CN104851727A (en) * | 2015-05-25 | 2015-08-19 | 东莞市高特电子有限公司 | Ultrathin reset mechanism of small mechanical switch, and small mechanical switch |
| CN205303262U (en) * | 2016-01-21 | 2016-06-08 | 深圳市亿科德科技有限公司 | Mechanical keyboard switch |
| US10485172B2 (en) | 2016-10-13 | 2019-11-26 | Terry Todd Cooper | Device and method of use for pecan picking |
-
2017
- 2017-07-21 JP JP2017142045A patent/JP2019021600A/en active Pending
-
2018
- 2018-06-20 WO PCT/JP2018/023473 patent/WO2019017135A1/en active Application Filing
- 2018-06-20 CN CN201880033207.5A patent/CN110651345A/en not_active Withdrawn
- 2018-06-20 KR KR1020197030201A patent/KR20190127837A/en not_active Application Discontinuation
- 2018-07-04 TW TW107123080A patent/TWI681428B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019017135A1 (en) | 2019-01-24 |
| TWI681428B (en) | 2020-01-01 |
| KR20190127837A (en) | 2019-11-13 |
| JP2019021600A (en) | 2019-02-07 |
| TW201909219A (en) | 2019-03-01 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20200103 |