JP2006344516A - Keytop board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a keytop board capable of easily positioning a keytop in a rotation direction at the time of mounting of the keytop on a rubber elastic board. <P>SOLUTION: The keytop board 1-1 is structured by mounting a keytop 10 on a rubber elastic board 50. A keytop positioning mechanism engaging the rubber elastic board 50 and the keytop 10 at only one point in the rotation direction is provided each at the keytop 10 and the rubber elastic board 50. The keytop positioning mechanism is constituted by engaging locking pieces 19, 21 protruded outward in a radial direction from an outer periphery face of a switch pressing part 17, and locking-piece engagement parts 55, 57 inserting the locking pieces 19, 21 continuously provided at an outer periphery of a switch-pressing part insertion part 53. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a key top plate in which a key top is attached on a rubber-like elastic plate.

  2. Description of the Related Art Conventionally, a key top plate to which a plurality of key tops for pushbutton switches are attached is used in an operation unit of electronic devices such as various portable devices. For example, as shown in FIG. 9 of Patent Document 1, this type of key top plate is configured by adhering various key tops made of molded resin with an adhesive on a flat rubber-like elastic plate.

  By the way, there is a case where a display portion for a desired character or symbol is formed on the surface of the key top. In such a case, the key top is rubberized with the display portion facing a predetermined direction. It was necessary to adhere to the elastic plate.

However, the operation of positioning the key top in the rotational direction so that its display portion faces a predetermined direction and bonding the key top to the rubber elastic plate is troublesome. In this case, the positioning cannot be performed only from the outer shape, which is complicated. In particular, this problem becomes more serious as the key top is reduced in size.
JP 2002-367471 A

  The present invention has been made in view of the above points, and an object thereof is to provide a key top plate capable of easily positioning the key top in the rotation direction when the key top is attached to the rubber-like elastic plate. It is in.

  The invention according to claim 1 of the present application is a key top plate configured by attaching a key top on a rubber elastic plate. The key top and the rubber elastic plate include a rubber elastic plate and a key top. The key top plate is provided with a key top positioning mechanism that engages only at one position in the rotation direction of the key top. Here, one place in the rotation direction means one place with respect to the 360 ° rotation direction. The present invention includes all embodiments described below.

  According to a second aspect of the present invention, a switch pressing portion protrudes from a mounting surface attached to the rubber elastic plate of the key top, and the switch pressing portion is inserted into the rubber elastic plate to penetrate therethrough. The key top plate according to claim 1, wherein a switch pressing portion insertion portion is provided. The present invention includes all embodiments described below.

  According to a third aspect of the present invention, the key top positioning mechanism is continuous with the locking piece protruding outward in the radial direction from the outer peripheral surface of the switch pressing portion and the outer periphery of the switch pressing portion insertion portion. 3. The key top plate according to claim 2, wherein the key top plate is configured by engaging with a locking piece engaging portion that inserts the locking piece. The present invention includes the first embodiment described below.

  The invention according to claim 4 is characterized in that there are a plurality of the locking pieces, and the positions of these locking pieces are set at asymmetrical positions with the switch pressing portion as the center point. It is in the key top plate described in 1. The present invention includes the first embodiment described below.

  According to a fifth aspect of the present invention, a switch pressing portion protrudes from a mounting surface attached to the rubber elastic plate of the key top, and the switch pressing portion is inserted into the rubber elastic plate to penetrate therethrough. A switch pressing portion insertion portion, and the key top positioning mechanism includes a locking piece projecting from a position different from the switch pressing portion of the mounting surface of the key top, and the engagement of the rubber-like elastic plate. 2. The key top plate according to claim 1, wherein the key top plate is configured by engaging with a locking piece engaging portion for inserting a stop piece. This invention includes the second embodiment described below.

  The invention according to claim 6 of the present application is characterized in that an outer peripheral key top having a key top storage portion for storing the key top is attached to the key top plate. The key top plate according to any one of the above. The present invention includes all embodiments described below.

  According to the seventh aspect of the present invention, a gap is formed on the lower surface side of the key top storage portion in which the key top is stored, and the rubber elastic plate is stored in the rubber elastic plate so as to be stored in the gap. The key top mounting part formed by making the thickness of this thicker than the surrounding part is provided, and the key top positioning mechanism is provided on the key top mounting part and the key top. On the key top board. The present invention includes the following first and second embodiments.

  In the invention according to claim 8 of the present application, the key top is formed by projecting a collar portion from the outer periphery of a key top main body formed by molding a molding resin on a synthetic resin film, and on the key top storage portion of the outer peripheral key top. Is provided with a collar portion accommodating portion for accommodating a collar portion projecting from the key top, and the collar portion of the key top is configured by projecting the synthetic resin film from the outer periphery of the key top body. The key top plate according to claim 7. The present invention includes all embodiments described below.

  According to the first and second aspects of the present invention, since the key top positioning mechanism is provided on the key top and the rubber elastic plate, the key top is positioned in the rotation direction when the key top is attached to the rubber elastic plate. be able to.

  According to the third aspect of the present invention, the key top positioning mechanism is configured by engaging the locking piece and the locking piece engaging portion. The key top can be positioned in the rotational direction. Further, since the locking piece is provided integrally with the switch pressing portion, a strong key top positioning mechanism can be formed using the switch pressing portion.

  According to the fourth aspect of the present invention, since the plurality of locking pieces are installed at asymmetrical positions with the switch pressing portion as the center point, the key top can be securely attached to the rubber-like elastic plate with a simple structure. Positioning in the rotational direction can be performed.

  According to the fifth aspect of the present invention, since the key top positioning mechanism is configured by the engagement of the locking piece and the locking piece engaging portion, the structure can be securely attached to the rubber-like elastic plate with a simple structure. The key top can be positioned in the rotational direction.

  According to the sixth aspect of the present invention, a key top plate having a structure in which the key top to which the present invention is applied is housed inside the outer peripheral key top can be configured. At that time, it is not necessary to position the key top in the rotational direction with the outer peripheral key top, and the structure of the outer peripheral key top is not complicated.

  According to the invention described in claim 7, since the gap is formed on the lower surface side of the key top stored in the key top storage portion of the outer peripheral key top, and the thick key top placement portion is stored in the gap, The key top can be positioned by the thick key top mounting portion, and therefore positioning by the key top positioning mechanism can be performed reliably.

  According to the invention described in claim 8, since the collar portion of the key top is composed of the synthetic resin film, the thickness thereof can be reduced, and the thickness of the key top mounting portion installed on the lower side can be increased accordingly. Therefore, positioning by the key top positioning mechanism can be performed more reliably.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[First embodiment]
1, FIG. 2 and FIG. 3 are views showing a main part (a part) of a switch plate 100-1 configured using the key top plate 1-1 according to the first embodiment of the present invention. FIG. 2 is an exploded perspective view of main parts viewed from the upper side, FIG. 2 is an exploded perspective view of main parts viewed from the lower side, and FIG. 3 is a side sectional view of the assembled switch plate 100-1. As shown in these drawings, the key top plate 1-1 is installed on a rubber-like elastic plate 50 in a ring-shaped outer peripheral key top 40 and a key top storage portion 41 provided in the center of the outer peripheral key top 40. It is configured by attaching the key top 10. The switch plate 100-1 is configured by placing the key top plate 1-1 on the switch contact plate 70. This type of switch plate 100-1 is used, for example, for an input unit of various portable terminals and various remote control devices. Each component will be described below.

  The key top 10 is configured by projecting a ring-shaped collar portion 13 from the lower part of the outer periphery of the substantially disk-shaped key top body 11 toward the radially outer side. Further, the lower surface of the key top body 11 of the key top 10 is a mounting surface 15 that is mounted on a key top mounting portion 51 of a rubber-like elastic plate 50 described below. From the center of the mounting surface 15, a substantially cylindrical switch. The pressing part 17 protrudes. A pair of rectangular locking pieces 19 and 21 constituting a key top positioning mechanism are provided protruding from the outer peripheral surface of the switch pressing portion 17 outward in the radial direction. In the pair of locking pieces 19, 21, the other locking piece 21 is installed at an asymmetrical position with respect to the one locking piece 19 with the switch pressing portion 17 as the center point. In other words, the other locking piece 21 with respect to one locking piece 19 is installed at a position other than the position facing the switch pressing portion 17 by 180 °. Note that the heights of the locking pieces 19 and 21 are slightly lower than the height of the switch pressing portion 17. As shown in FIG. 3, the key top 10 is molded resin (for example, polycarbonate resin) 27 in a recess on the lower surface side of a synthetic resin film (for example, polycarbonate film) 23 formed in the same shape as the upper surface of the key top 10. The collar portion 13 protruding from the outer periphery thereof is constituted only by the synthetic resin film 23. Accordingly, the thickness of the collar portion 13 can be made extremely thin. More specifically, when the collar portion 13 is made of a molded resin, about 300 μm is required, but when the collar portion 13 is made of a synthetic resin film 23, it can be about 50 μm. A display portion 25 made of a predetermined symbol or character is formed on the upper surface of the key top 10 by various means such as printing and vapor deposition. Therefore, when the key top 10 is attached to the rubber elastic plate 50, There is directionality in the direction of rotation.

  The outer peripheral key top 40 is formed in a substantially flat ring shape, and has a circular through hole at the center thereof, and is provided with a key top storage portion 41 for storing the key top 10 therein. The inner diameter of the upper part of the key top storage part 41 is formed to be such that the key top body 11 of the key top 10 can be moved up and down, and the inner diameter of the lower part of the key top storage part 41 increases the inner diameter. Thus, the flange portion storage portion 44 is formed to have a size that allows the flange portion 13 of the key top 10 to be moved up and down. That is, the key top storage part 41 of the outer peripheral key top 40 is provided with a collar part storage part 44 for storing the collar part 13 protruding from the key top 10. The key top storage part 41 is a concept including a collar part storage part 44. A plurality of (four in this embodiment) circular and concave mounting portions 45 are provided at equal intervals on the lower surface of the outer peripheral key top 40. The outer peripheral key top 40 is made of molded resin.

  In this embodiment, the rubber-like elastic plate 50 is formed by molding silicon rubber into a substantially flat thin plate shape, and includes a key top placement portion 51 for placing the mounting surface 15 of the key top 10 and a key top. The switch pressing portion 59 is provided around the mounting portion 51 and installed at a position facing each mounting portion 45 of the outer peripheral key top 40. The key top mounting portion 51 is cylindrical, and has a thickness that is thicker than the surrounding portion, and is configured to protrude upward. At the center of the key top mounting portion 51, a switch pressing portion insertion portion 53 comprising a through hole into which the switch pressing portion 17 of the key top 10 is inserted is provided, and is connected to the outer periphery of the switch pressing portion insertion portion 53. A pair of rectangular locking piece engaging portions 55 and 57 constituting a key top positioning mechanism for fitting the pair of locking pieces 19 and 21 of the key top 10 are provided. The locking pieces 19 and 21 and the locking piece engaging portions 55 and 57 have substantially the same cross-sectional shape, and the locking pieces 19 and 21 are inserted into the locking piece engaging portions 55 and 57. Are formed in a size and shape in which both are fitted or press-fitted together. A concave portion 58 that is recessed in a shallow circular shape is provided on the lower surface of the key top mounting portion 51. The switch pressing portion 59 is formed so that its outer diameter is slightly smaller than the inner diameter of the mounting portion 45 provided on the outer peripheral key top 40.

  The switch contact plate 70 is configured by installing a switch 73 at a position on the circuit board 71 facing the switch pressing portion 17 of the key top 10 and a position facing each switch pressing portion 59 of the rubber-like elastic plate 50. ing. Although not clearly shown in the figure, the circuit board 71 is configured by placing a flexible circuit board on a hard reinforcing plate and attaching a reversing plate 75 to each switch 73 portion.

  Next, to manufacture the switch plate 100-1, first, the mounting surface 15 of the key top 10 is placed on the key top mounting portion 51 of the rubber-like elastic plate 50, and is attached and fixed with an adhesive. At this time, the switch pressing portion 17 of the key top 10 and the locking pieces 19 and 21 on the outer periphery thereof are respectively a switch pressing portion insertion portion 53 provided on the key top mounting portion 51 and a pair of locking piece engaging portions 55, 57, respectively. At this time, the locking pieces 19 and 21 and the locking piece engaging portions 55 and 57 for fitting them are installed at asymmetrical positions with the switch pressing portion 17 (switch pressing portion insertion portion 53) as the center point. Therefore, the key top 10 is engaged only at one place in the rotation direction. Therefore, even if the display unit 25 is described on the upper surface of the key top 10 and the display has a direction, there is no fear that the key top 10 is attached in a different direction by mistake in the direction. Next, the lower surface of the outer peripheral key top 40 is placed on the rubber-like elastic plate 70, and each switch pressing portion 59 provided on the rubber-like elastic plate 50 is attached to each attachment portion 45 provided on the lower surface of the outer peripheral key top 40 at that time. The switch is inserted, and the space between the upper surface of the switch pressing portion 59 and the bottom surface of the attachment portion 45 is attached and fixed with an adhesive. The switch pressing portion 59 and the mounting portion 45 have a function of positioning the outer peripheral key top 40 on the rubber elastic plate 50 (however, the outer key top 40 has a plurality of positions relative to the rubber elastic plate 50 (90 in this embodiment). Positioned in four directions)). At the same time, as shown in FIG. 3, the key top 10 and the lower key top mounting portion 51 are accommodated in the key top accommodating portion 41 of the outer peripheral key top 40, and the upper surface of the collar portion 13 is the collar. It is located in the upper part of the part storage part 44. As a result, the key top plate 1-1 is completed. When the key top plate 1-1 is installed on the switch contact plate 70, the switch plate 100-1 is completed. At this time, a switch 73 is installed at a position facing the switch pressing portion 17 of the key top 10 and a position facing each switch pressing portion 59 of the rubber-like elastic plate 50.

  Then, for example, in FIG. 3, when the upper surface of the key top body 11 of the key top 10 is pressed, the switch pressing portion 17 presses the switch 73 opposed thereto, reverses the reverse plate 75, and the switch is turned on. When the pressure on the key top body 11 is released, the reverse plate 75 automatically returns to its original shape by the elastic return force of the reverse plate 75, the key top 10 is raised, and the switch 73 is turned off. On the other hand, when a portion of the outer peripheral key top 40 that is directly above the switch pressing portion 59 is pressed, the reverse plate 75 of the switch 73 positioned immediately below the reverse key 75 is reversed and the switch is turned on. When the pressure on the outer peripheral key top 40 is released, the reverse plate 75 automatically returns to its original shape by the elastic return force of the reverse plate 75, the outer peripheral key top 40 is raised, and the switch 73 is turned off.

  By the way, in the key top plate 1-1, as a key top positioning mechanism in which the rubber-like elastic plate 50 and the key top 10 are engaged at only one place in the rotation direction of the key top 10, from the outer peripheral surface of the switch pressing portion 17. The locking pieces 19 and 21 projecting outward in the radial direction, and the locking piece engaging portions 55 for inserting the locking pieces 19 and 21 provided continuously on the outer periphery of the switch pressing portion insertion portion 53. However, the present invention is not limited to this embodiment, and the shape of the switch pressing portion 17 and the switch pressing portion insertion portion 53 is rubber-like. Any configuration may be used as long as the key top positioning mechanism is formed so as to be engaged with the elastic plate 50 at only one position in the rotation direction of the key top 10. In the above embodiment, a pair (two sets) of the locking pieces 19 and 21 and the locking piece engaging portions 55 and 57 are provided. However, these locking pieces and the locking piece engaging portions are one set or three sets or more. A plurality of sets may be provided. When there are two or more sets of locking pieces and locking piece engaging portions, the positions of these locking pieces as a whole need to be installed at asymmetrical positions with the switch pressing portion 17 as the center point. However, the reason why the pair (two sets) of the locking pieces 19 and 21 and the locking piece engaging portions 55 and 57 are provided in the present embodiment is as follows. That is, if the locking piece 21 and the locking piece engaging portion 57 are omitted and only one set of the locking piece 19 and the locking piece engaging portion 55 is provided, these are substantially linear, as shown in FIG. As shown, the linear switch pressing portion 17 and the locking piece 19 cannot be moved to the linear switch pressing portion insertion portion 53 and the locking piece engaging portion 55 in a state where the locking piece 19 is rotated in the reverse direction of 180 °. If the switch pressing portion insertion portion 53 and the locking piece engaging portion 55 are elastic, the inner diameter of the switch pressing portion insertion portion 53 and the locking piece engaging portion 55 may be forcibly opened to engage with each other. In particular, if the key top 10 is downsized and the switch pressing portion 17 and the locking piece 19 and the switch pressing portion insertion portion 53 and the locking piece engaging portion 55 are downsized, the insertion becomes easier. On the other hand, as in the present embodiment, a pair (two sets) of locking pieces 19 and 21 and locking piece engaging portions 55 and 57 are provided, and both of them are in an asymmetrical position with the switch pressing portion 17 as the center point. When installed, the locking pieces 19 and 21 and the locking piece engaging portions 55 and 57 are forcibly engaged with each other in a state in which this is rotated to a position shifted from the normal position as shown in FIG. However, since either one of the locking pieces 19, for example, abuts on the surface A1 of the surfaces A1 and A2 partitioned by the locking piece engaging portions 55 and 57, both of them are forcibly engaged. There is no. On the other hand, in addition to the locking piece engaging portions 55 and 57 as described above, another locking piece engaging portion 58 is provided as shown in FIG. When two are provided, the lengths b1, b2, and b3 in the rotational direction of the surfaces a1, a2, and a3 partitioned by the three locking piece engaging portions 55, 57, and 58 are reduced. , A2 and a3, the force that prevents the locking pieces inserted in the locking piece engaging portions 55, 57, and 58 from rotating is weakened, and the surface is applied when a rotational force is applied to the locked key top 10. There is an increased possibility that the switch pressing portion 17 is rotated by a1, a2, a3 being spread. This problem becomes more serious as the key top 10 becomes smaller and the locking piece and the locking piece engaging portion become smaller. Therefore, in the present embodiment, only one pair of the locking pieces 19 and 21 and the locking piece engaging portions 55 and 57 are provided, and the lengths B1 and B2 in the rotational direction of the surfaces A1 and A2 shown in FIG. The force for increasing the locking pieces 19 and 21 on the surfaces A1 and A2 so as not to rotate is increased.

  By the way, if the key top plate 1-1 of this embodiment is changed in view, as shown in FIG. 3, a gap E is formed on the lower surface side of the key top storage portion 41 of the outer peripheral key top 40 in which the key top 10 is stored, On the other hand, the rubber-like elastic plate 50 is provided with a key-top placement portion 51 formed so that the thickness of the rubber-like elastic plate 50 is thicker than the surrounding portion so as to be accommodated in the gap E. A key top positioning mechanism including the locking pieces 19 and 21 and the locking piece engaging portions 55 and 57 is provided on the mounting portion 51 and the key top 10. The reason why the gap E is provided in this way and the thick keytop placement portion 51 is accommodated therein is as follows. That is, according to the present invention, unlike the other key top plate 1′-1 shown in FIG. 5 (the same parts as those in the first embodiment are denoted by the same reference numerals), the collar portion storage portion 44 is not necessarily provided. The portion 13 may be opposed to the lower surface of the outer peripheral key top 40. However, when configured in this manner, the thickness of the key top mounting portion 51 is reduced, and the detent strength of the key top 10 by the locking piece 19 (21) and the locking piece engaging portion 55 (57) is reduced accordingly. Become. Therefore, in the case of this embodiment where the outer peripheral key top 40 is relatively thick, the gap E is formed on the lower surface side of the key top storage portion 41 of the outer peripheral key top 40 in which the key top 10 is stored, The key top mounting portion 51 installed inside the gap E is increased in thickness, and a locking piece engaging portion 55 (57) is formed in the thick key top mounting portion 51, and at the same time, the key top mounting portion 51 is formed. The length of the locking piece 19 (21) is increased by an amount corresponding to the wall thickness, thereby increasing the engagement length of the locking piece 19 (21) and the locking piece engaging portion 55 (57). The detent strength of 10 was increased. Furthermore, in the case of the first embodiment, since the flange portion 13 of the key top 10 is configured by projecting the synthetic resin film 23 from the outer periphery of the key top body 11, the thickness thereof is thin as described above. Moreover, the lower surface of the key top body 11 (the lower surface of the molding resin 27) is flush with the lower surface of the collar portion 13. Accordingly, it is possible to increase the size of the gap E on the lower surface side in which the key top 10 of the key top storage portion 41 of the outer peripheral key top 40 is stored, and to further increase the detent strength of the key top 10. This is particularly effective when the thicknesses of the key top 10 and the outer peripheral key top 40 are reduced. In this embodiment, the key top 10 has a structure in which the synthetic resin film 23 is bent so as to cover the upper surface of the key top body 11, and the molding resin 27 is filled in the lower concave portion that is bent and deformed. However, for example, a key top having a structure in which a through hole is formed in a synthetic resin film and a molding resin to be a key top is formed on the upper and lower surfaces thereof may be used. That is, the key top may be formed by projecting the collar portion from the outer periphery of the key top body formed by molding a molding resin on a synthetic resin film. Furthermore, when it is not necessary to reduce the thickness of the collar portion, the entire key top including the collar portion may be formed of a molding resin.

[Second Embodiment]
FIG. 6 is an exploded perspective view of main parts of a main part (a part) of the switch plate 100-2 configured using the key top plate 1-2 according to the second embodiment of the present invention, as viewed from below. These are sectional side views of the assembled key top plate 1-2. In this switch board 100-2, the same code | symbol is attached | subjected to the same or equivalent part as the switch board 100-1 concerning said 1st embodiment. Items other than those described below are the same as those in the first embodiment shown in FIGS. Also in this embodiment, the key top plate 1-2 is arranged on the rubber-like elastic plate 50 on the ring-shaped outer peripheral key top 40 and the key top storage portion 41 provided in the center of the outer peripheral key top 40. The switch plate 100-2 is configured by mounting the key top plate 1-2 on the switch contact plate 70.

  This embodiment differs from the first embodiment only in the structure of the key top positioning mechanism provided on the key top 10 and the rubber elastic plate 50. That is, in this embodiment, as in the first embodiment, the locking pieces 19 and 21 are provided around the switch pressing portion 17 of the key top 10 (that is, on the switch pressing portion 17 itself) and are engaged with the rubber-like elastic plate 50. Instead of providing the locking piece engaging portions 55 and 57 for locking the locking pieces 19 and 21, the locking piece 19 a and the locking provided at a position different from the switch pressing portion 17 and the switch pressing portion insertion portion 53. From the one engagement portion 55a, that is, the locking piece 19a protruding from a position different from the switch pressing portion 17 of the mounting surface 15 of the key top 10, and the through hole into which the locking piece 19a of the rubber elastic plate 50 is inserted. The key top positioning mechanism is configured by engaging with the engaging piece engaging portion 55a. If comprised in this way, a keytop positioning mechanism can be installed in the position different from the switch press part 17 and the switch press part insertion part 53. FIG. However, although the locking pieces 19 and 21 of the first embodiment can be kept strong by connecting to the switch pressing portion 17 even if the key top 10 is downsized and its size is reduced, the strength of the locking pieces 19 and 21 can be maintained. Since the strength of the stopper 19a becomes weaker as it becomes smaller, the first embodiment is more advantageous when the key top 10 is downsized.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. It should be noted that any shape, structure, and material not directly described in the specification and drawings are within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are exhibited. For example, in the above embodiment, the present invention is applied to the key top 10 housed in the key top housing portion 41 of the outer peripheral key top 40, but the present invention is applied to various key tops that are independently mounted on the rubber-like elastic plate. However, the same can be applied. In short, the present invention can be applied to a key top plate having any structure as long as the key top plate is configured by attaching a key top on a rubber-like elastic plate. The key top 10 accommodated in the key top accommodating portion 41 of the outer peripheral key top 40 is normally positioned with respect to the groove provided around the key top accommodating portion 41 on the lower surface of the outer peripheral key top 40. This is done by locking the protrusion protruding from the outer periphery of the collar portion. However, if the key top 10 is positioned with the rubber-like elastic plate 50 as in this embodiment, This eliminates the need for special processing, which is preferable.

  In the above embodiment, the switch pressing portion insertion portion 53 and the locking piece engaging portions 55 and 57 are provided through the key top placement portion 51 of the rubber-like elastic plate 50. A bottom hole may be used. If comprised in this way, since a through-hole will be lose | eliminated from the rubber-like elastic board 50, it is suitable for waterproofing of the keytop boards 1-1 and 1-2. On the other hand, when the switch pressing portion insertion portion 53 and the locking piece engaging portions 55 and 57 are formed as through holes, the switch pressing portion 17 of the key top 10 made of molded resin directly presses the switch 73. It is suitable when it is desired to obtain a good pressing feeling. Needless to say, the shapes and structures of the locking pieces 19 and 21 and the locking piece engaging portions 55 and 57 into which the locking pieces 19 and 21 are inserted can be variously changed.

It is the principal part disassembled perspective view which looked at the switch board 100-1 comprised using the keytop board 1-1 from the upper side. It is the principal part disassembled perspective view which looked at switch board 100-1 from the lower side. It is a sectional side view of switch board 100-1. It is engagement relation explanatory drawing at the time of changing the number etc. of a locking piece and a locking piece engaging part. It is a sectional side view of other key top boards 1'-1. It is the principal part disassembled perspective view which looked at the switch board 100-2 comprised using the keytop board 1-2 from the lower side. It is a sectional side view of the key top board 1-2.

Explanation of symbols

1-1 Key Top Plate 10 Key Top 11 Key Top Body 13 Collar Part 15 Mounting Surface 17 Switch Pressing Parts 19, 21 Locking Piece (Key Top Positioning Mechanism)
23 Synthetic resin film 25 Display unit 40 Peripheral key top 41 Key top storage unit 44 Collar unit storage unit 50 Rubber elastic plate 51 Key top placement unit 53 Switch pressing unit insertion unit 55, 57 Locking piece engagement unit (key top Positioning mechanism)
70 Switch contact plate 73 Switch 75 Reversing plate E Gap 1-2 Key top plate

Claims (8)

In the key top plate configured by attaching the key top on the rubber elastic plate,
A keytop plate, wherein the keytop and the rubber-like elastic plate are provided with a keytop positioning mechanism in which the rubber-like elastic plate and the keytop engage with each other only at one position in the rotation direction of the keytop.   A switch pressing portion protrudes from a mounting surface attached to the rubber elastic plate of the key top, and a switch pressing portion insertion portion through which the switch pressing portion is inserted is provided in the rubber elastic plate. The key top plate according to claim 1, wherein:   The key top positioning mechanism inserts a locking piece that protrudes radially outward from the outer peripheral surface of the switch pressing portion, and the locking piece that is continuously provided on the outer periphery of the switch pressing portion insertion portion. The key top plate according to claim 2, wherein the key top plate is configured by engaging with an engaging piece engaging portion to be engaged.   The key top plate according to claim 3, wherein there are a plurality of the locking pieces, and the positions of the locking pieces are asymmetrical with respect to the switch pressing portion. A switch pressing portion protrudes from the mounting surface attached to the rubber elastic plate of the key top, and a switch pressing portion insertion portion through which the switch pressing portion is inserted is provided in the rubber elastic plate,
On the other hand, the key top positioning mechanism includes a locking piece protruding from a position different from the switch pressing portion of the key top mounting surface, and a locking piece engagement for inserting the locking piece of the rubber elastic plate. The key top plate according to claim 1, wherein the key top plate is configured by engaging the portion.   6. The key top plate according to claim 1, wherein an outer peripheral key top having a key top storage portion for storing the key top is attached to the key top plate. .   A gap is formed on the lower surface side of the key top storage portion where the key top is stored, and the thickness of the rubber elastic plate is made thicker than the surrounding portion in the rubber elastic plate so as to be stored in the gap. The key top plate according to claim 6, wherein a key top mounting portion formed is provided, and the key top positioning mechanism is provided on the key top mounting portion and the key top. The key top is formed by projecting a collar portion from the outer periphery of a key top body formed by molding a molding resin on a synthetic resin film,
On the other hand, the key top storage part of the outer peripheral key top is provided with a collar part storage part for storing a collar part protruding from the key top,
The key top plate according to claim 7, wherein the flange portion of the key top is configured by projecting the synthetic resin film from an outer periphery of the key top main body.

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