TWM496214U - Sheet with keystroke spring and switch device - Google Patents

Description

Sheet and switch device with key spring

This creation relates to a sheet and switch device with a keystroke spring that makes the operation feel good.

As a structure of a sheet with a keystroke spring used as an input key switch or the like in various electronic devices such as mobile phones, it is known that a dome-shaped key spring is attached to the back side of the flexible film. When the top of the keystroke spring (also referred to as the reversal plate) is pressed, the pressed top is reversed, so that the reversing action can function to turn on the contact of the switch, and the operation accompanying the reversing action can be performed. The tactile sensation (keystroke sensation) is preferred.

For example, Patent Document 1 discloses a switch that ensures the circulation of air around the reversing plate during the reversing operation required to obtain a good keying feeling when the reversing plate is reversed. The property is good, and on the other hand, the intrusion of dust into the assembly portion of the reversing plate can be prevented to ensure good operational reliability or contact stability of the reversing plate. The amount of operation (stroke) of the amount of movement in the up and down direction in the reverse rotation operation of the reversal plate is limited by the tension of the cover film. Therefore, when it is desired to increase the amount of operation, the operation of the inversion plate cannot be followed, resulting in a decrease in the operational touch.

Therefore, in the sheet and switch device with a keystroke spring described in Patent Document 2, a plurality of slits formed to be spirally formed toward the top of the keystroke spring are provided.

Fig. 12 is a perspective view showing a sheet 100 with a keystroke spring described in Patent Document 2, Fig. 12(a) is a plan view, Fig. 12(b) is a front view, and Fig. 12(c) is a view A cross-sectional view of the pattern obtained by cutting the XII-XII line of 12(a). As shown in Figure 12, with In the sheet of the keystroke spring 100, a plurality of slits 120 are provided on the sheet 102, and the plurality of slits 120 are oriented toward the keystroke spring 105 from a position outside the outer peripheral portion 105b of the keystroke spring 105 in plan view. The top portion 105a is formed in a spiral shape. According to this aspect, in the operation of pressing the sheet 102 on which the key spring 105 is attached to one surface side from the upper side and inverting the top portion 105a of the key spring 105 downward, the slit 120 is provided in a spiral shape. Since the tension of the stretched sheet 102 can be reduced, even if the operation amount (stroke) is set large, the operational feeling can be made good.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent No. 3766768

[Patent Document 2] Japanese Utility Model Registration No. 3181914

However, when it is desired to further increase the amount of operation, although it is conceivable to increase the position of the top portion 105a without increasing the plane size of the dome-shaped keystroke spring 105, when the top portion 105a of the keying spring 105 is reversed, the key The striking spring 105 is attached to the sheet 102 corresponding to the position where the slit 120 is formed, so that the operational feeling is deteriorated.

The present invention has been made in an effort to solve the above problems, and an object thereof is to provide a sheet and a switch device with a keystroke spring which can make a good touch feeling even if the operation amount is set large.

The present invention is a sheet with a keystroke spring having a dome-shaped keystroke spring and a sheet with the above-described key spring attached to one side; characterized by: from above the top of the keystroke spring In the side pressing operation, the top portion of the keystroke spring is reversed downward, and the sheet is flexible and provided with a plurality of slits for the outer circumference of the keystroke spring in a plan view a position of the outer side facing the top of the keystroke spring is formed in a spiral shape, and corresponds to the plurality of slits A protective sheet that is not attached to the above-described key spring is provided at a position where the formation range is provided.

According to this aspect, in the operation of pressing the sheet of the key spring attached to one surface side from the upper side to reverse the top of the key spring, the outer periphery of the key spring is made by protecting the sheet. It does not stick to the sheet during its reverse operation, so the amount of operation can be increased. By providing a slit having a spiral shape, the tension of the stretched sheet can be reduced, and by protecting the sheet, the outer peripheral portion is not attached to the sheet when the key spring is reversed, so even if it is set large The amount of operation can also make the operation feel good.

A sheet with a keystroke spring according to the present invention is characterized in that at least one of the plurality of slits is formed on a radial imaginary line centering on the top of the keystroke spring.

According to this aspect, since a plurality of slits are disposed throughout, the followability of the sheet to the action of the keystroke spring is preferable.

A sheet with a keystroke spring according to the present invention is characterized in that the protective sheet is disposed at a position overlapping the plurality of slits in a plan view.

According to this aspect, the followability of the sheet for the reverse operation is better by not attaching to the portion of the keystroke spring, so that the operational touch is good.

The sheet with a keystroke spring according to the present invention, wherein the sheet has the protective sheet, the cover sheet, and the spacer sheet, and the spacer sheet is disposed on the one surface side, and is provided with a housing portion for accommodating the key spring. The keystroke spring is located at an inner side of the inner wall of the accommodating portion in a plan view, and the top portion is disposed substantially at the center of the accommodating portion so as to be attached to the cover sheet, and the plurality of slits The cover sheet is formed on the cover sheet from the position of the inner wall of the accommodating portion toward the inner side in a plan view.

According to this aspect, the amount of movement in the reverse operation of the top of the keystroke spring is set by the shape of the keystroke spring and the thickness of the spacer sheet, so that even when the amount of movement is largely set, it is set on the cover sheet. Has a spiral-shaped slit, so it can also reduce the stretched cover The tension of the sheet can make the operation feel good.

The sheet with a keystroke spring according to the present invention is characterized in that the plurality of key springs are plural, and the plurality of slits are formed with respect to each of the key springs.

According to this aspect, since there are a plurality of keystroke springs, it is possible to correspond to a plurality of operation portions such as a keyboard.

a sheet with a keystroke spring according to the present invention, wherein the plurality of keystroke springs are plural, and the plurality of slits corresponding to the keystroke springs disposed in a proximity state are disposed on the proximal side One of the plurality of slits is formed to be shorter than the other slits.

According to this aspect, one of the plurality of slits corresponding to the keystroke springs disposed in the proximity state among the plurality of keystroke springs is formed to be shorter than the other slits. Thereby, even in the keystroke spring of the proximity state, the tension of the stretched cover sheet can be reduced by providing a plurality of slits including the short slits, thereby making the operation touch and other keystrokes The spring portion is hardly reduced compared to the part.

A sheet with a keystroke spring according to the present invention is characterized in that the sheet has an adhesive layer, and the width of the slit in the short side direction is 0.2 mm.

According to this aspect, since the sheet has an adhesive layer, the top of the key spring can be attached via the adhesive layer. Further, since the width of the slit in the short side direction is 0.2 mm, it is easy to use the laser processing slit, and there is no fear that the adhesive layer is re-welded in the short side direction of the slit.

The switch device of the present invention is characterized in that it has the above-described sheet with a keystroke spring, and the keystroke spring is used as a movable contact, and a fixed contact is disposed on a lower side of a position corresponding to the keystroke spring.

According to this aspect, it is possible to manufacture a switching device which can increase the amount of operation and has a good operational touch by the sheet with the key spring formed with the slit of the spiral shape.

The switch device of the present invention is characterized in that it has the above-mentioned sheet with a keystroke spring, and is provided with a fixed contact on the lower side corresponding to the position of the above-mentioned keystroke spring. The switch part of the movable contact.

According to this aspect, it is possible to manufacture a switching device which can increase the amount of operation and has a good operational touch by the sheet with the key spring formed with the slit of the spiral shape.

In the case of the sheet with the keystroke spring of the present invention, the sheet is attached to the one side from the upper side, and the top of the key spring is reversed downward. The sheet is such that the outer peripheral portion does not adhere to the sheet when the key spring is reversed. Since the slit having the spiral shape is provided, the tension of the stretched sheet can be reduced, and by protecting the sheet, the outer peripheral portion of the key spring does not adhere to the sheet during the reverse operation, so even if it is large By setting the amount of operation, the operation feels good.

In the switching device of the present invention, the sheet with the keystroke spring formed with the slit of the spiral shape can increase the amount of operation and has a good operational touch.

Therefore, according to the present invention, it is possible to provide a sheet and a switching device with a keystroke spring which can increase the amount of operation while the sheet is being followed in a state in which the operation touch is maintained.

1‧‧‧Sheet with key spring

2‧‧‧Sheet

3‧‧‧Base

4‧‧‧ Housing Department

4a‧‧‧ inner wall

5‧‧‧Key spring

5a‧‧‧ top

5b‧‧‧The outer part

5c‧‧‧foot

11, 13, ‧ ‧ sheets with key springs

20‧‧‧ slit

21‧‧‧ Covering sheets

21a‧‧‧Adhesive layer

22‧‧‧ spacer sheet

23‧‧‧Protective sheet

23a‧‧‧Adhesive layer

25, 26, 27, 28 ‧ ‧ slits

30, 31, 32, 33, 34, 35‧‧‧ switchgear

60‧‧‧Switch Department

61‧‧‧film sheet

62‧‧‧ spacer sheet

63‧‧‧Base

65‧‧‧ movable joints

66‧‧‧Fixed joints

67‧‧‧Contact components

68‧‧‧Shell

69‧‧‧Operating components

100‧‧‧Sheet with key spring

102‧‧‧Sheet

105‧‧‧Key spring

105a‧‧‧ top

105b‧‧‧The outer part

120‧‧‧slit

Fig. 1 is a perspective view showing a sheet with a keystroke spring according to a first embodiment of the present invention and a switch device using the same, Fig. 1(a) is a plan view, and Fig. 1(b) is a front view of the mode, Fig. 1 (c) is a schematic cross-sectional view obtained by cutting the line III-III of Fig. 1(a).

Fig. 2 is an exploded perspective view showing the configuration of the switch device of the first embodiment.

3 is a schematic cross-sectional view of a switching device cut by the line III-III of FIG. 1, FIG. 3(a) is a schematic sectional view of the initial state, and FIG. 3(b) is a schematic sectional view of the mode under the operating state of FIG. Fig. 3 (c) is an enlarged explanatory view of a portion A shown in Fig. 3 (a).

Fig. 4 is an external view showing a first modification of the sheet with a keystroke spring and a switch device according to the first embodiment, wherein Fig. 4(a) is a plan view, and Fig. 4(b) is a view of Fig. 4(a). A cross-sectional view of the pattern obtained by cutting the IV-IV line.

Fig. 5 is a perspective view showing a second modification of the switch device according to the first embodiment; 5(a) is a plan view of the mode, and FIG. 5(b) is a schematic cross-sectional view taken by cutting the V-V line of FIG. 5(a).

Fig. 6 is a perspective view showing a sheet with a keystroke spring according to a second embodiment of the present invention and a switch device using the same, Fig. 6(a) is a plan view, and Fig. 6(b) is a front view of the mode.

Fig. 7 is a schematic cross-sectional view showing a switching device taken along the line VII-VII of Fig. 6, Fig. 7(a) is a cross-sectional view in an initial state, and Fig. 7(b) is a cross-sectional view showing a mode in an operating state. 7(c) is an enlarged explanatory view of a portion C shown in Fig. 7(a).

8 is an external view showing a first embodiment of a switch with a keystroke spring and a switch device using the same according to the second embodiment, wherein FIG. 8(a) is a plan view, and FIG. 8(b) is a view of FIG. a) A cross-sectional view of the pattern obtained by cutting the VIII-VIII line.

Fig. 9 is an external view of a sheet with a keystroke spring according to a sixth embodiment of the present invention and a switch device using the same, Fig. 9(a) is a plan view, and Fig. 9(b) is a view of Fig. 9(a) A cross-sectional view of the pattern obtained by cutting the IX-IX line.

Fig. 10 is a schematic view showing the shape of a slit.

11(a) to 11(c) are schematic diagrams showing a variation of the shape of the slit.

Figure 12 is an external view showing a sheet with a keystroke spring, Figure 12 (a) is a plan top view, Figure 12 (b) is a mode front view, Figure 12 (c) is a Figure X (a) XII -XII line cut pattern obtained by cutting.

Hereinafter, embodiments of the present creation will be described in detail using the drawings. Furthermore, for ease of understanding, the dimensions are appropriately changed in the drawings.

[First Embodiment]

Hereinafter, the sheet 1 with the key spring and the switch device 30 in the first embodiment will be described with reference to Figs. 1 to 3 and Fig. 10 . Fig. 1 is a perspective view showing a sheet 1 with a keystroke spring according to a first embodiment and a switch device 30 using the same, and Fig. 1(a) is a plan view Fig. 1(b) is a front view of the mode, and Fig. 1(c) is a schematic cross-sectional view taken by cutting the line III-III of Fig. 1(a). Fig. 2 is an exploded perspective view showing the configuration of the switch device 30 of the first embodiment. 3 is a schematic cross-sectional view of the switch device 30 cut along the line III-III of FIG. 1, FIG. 3(a) is a schematic sectional view of the initial state, and FIG. 3(b) is a schematic sectional view of the mode of operation. Fig. 3(c) is an enlarged explanatory view of a portion A shown in Fig. 3(a). Fig. 10 is a schematic view showing the shape of the slit 20.

As shown in FIGS. 1 and 2, the switch device 30 is a combination of a sheet 1 with a key spring of a key spring 5 and a base 3 on which a fixed contact 66 and a contact member 67 are disposed. As shown in FIG. 2, the sheet 1 with a keystroke spring is composed of a key spring 5 and a sheet 2 formed by laminating a cover sheet 21, a spacer sheet 22, and a protective sheet 23.

The cover sheet 21 is obtained by processing a flexible film material such as PET (Polyethylene Terephthalate). In the present embodiment, the thickness is set to 23 μm. A slit 20 having a spiral shape is formed on the cover sheet 21. Such a slit 20 is formed by processing the sheet 21 by laser processing. As the cover sheet 21, in addition to a transparent film material, for example, a film material obtained by mixing a white pigment with a white color or a film material mixed with a black pigment and colored black may be used. Further, the cover sheet 21 is embossed in advance so that the central portion protrudes upward.

The spacer sheet 22 is formed by processing a flexible film material such as PET. In the present embodiment, the thickness is set to 75 μm. As shown in FIG. 2, the spacer sheet 22 is formed with an opening for accommodating the key spring 5.

The protective sheet 23 is formed by processing a flexible film material such as PET. In the present embodiment, the thickness is set to 12 μm. As shown in FIG. 2, the protective sheet 23 is formed with an opening having a smaller diameter than the opening formed in the spacer sheet 22, and the entire surface other than the opening is attached to one surface side of the cover sheet 21. Further, one surface side of the protective sheet 23 is bonded to the spacer sheet 22 except for a region corresponding to the opening of the spacer sheet 22. The spacer sheet 22 is attached to the cover sheet 21 via the protective sheet 23, and the cover sheet 21 covers the opening of the spacer sheet 22, This forms a space for the housing portion 4. Further, the protective sheet 23 is embossed in advance so that the periphery of the opening protrudes upward.

The keystroke spring 5 is formed by processing a thin sheet of stainless steel into a dome shape. In the present embodiment, the height of the dome shape is set to 1 mm. As shown in Fig. 2, the key spring 5 has a dome shape having a top portion 5a, and the outer peripheral portion 5b has four leg portions 5c.

As shown in FIG. 3(a), the key spring 5 is housed in the central portion of the accommodating portion 4. As shown enlarged in FIG. 3(c), an adhesive layer 21a is formed on one surface of the cover sheet 21 on the side where the sheet 2 is in contact with the key spring 5. Thereby, the cover sheet 21 of the sheet 2 is bonded to the protective sheet 23 via the adhesive layer 21a. Further, the sheet 2 is bonded to the top portion 5a of the key spring 5 via the adhesive layer 21a formed on the cover sheet 21. Moreover, the protective sheet 23 is bonded to the spacer sheet 22 via the adhesive layer 23a. Therefore, the periphery of the opening of the protective sheet 23 is bulged in a dome shape in accordance with the shape of the key spring 5, and the cover sheet 21 is bulged in a dome shape in accordance with the shape of the protective sheet 23 and the key spring 5.

Thus, the sheet 1 with the keystroke spring is composed of the key spring 5 and the sheet 2 in which the cover sheet 21, the spacer sheet 22, and the protective sheet 23 are laminated. Further, as shown in FIG. 3(c), the opening of the protective sheet 23 is spaced apart from the inner wall 4a of the accommodating portion 4 by a specific size, and the adhesive layer 21a of the cover sheet 21 is not in contact with the outer peripheral portion 5b of the key spring 5. . The slit 20 is formed at a position overlapping the protective sheet 23 in plan view.

The susceptor 3 is formed by molding an insulating resin material such as a phenol resin, and a fixed contact 66 and a contact member 67 including a conductive metal plate are disposed on the surface of the susceptor 3. The fixed contact 66 and the contact member 67 are provided so as to have connection portions (not shown) embedded in the susceptor 3, and can be connected to the external wiring in a state of being electrically insulated from each other.

As shown in Fig. 3 (a), the contact member 67 is disposed at a position where the outer peripheral portion 5b (foot portion 5c) of the key spring 5 abuts when the sheet 1 with the key spring and the base 3 are assembled. . The spacer sheet 22 is bonded to the susceptor 3 via an adhesive layer (not shown), whereby the contact member 67 is electrically connected to the key spring 5.

The fixed contact 66 is disposed on the lower side corresponding to the plane position of the key spring 5 when the sheet 1 with the key spring and the base 3 have been assembled. Since the fixed contact 66 is disposed in a state of being electrically insulated from the contact member 67, and the key spring 5 is dome-shaped, as shown in FIG. 3(a), in the initial state, the top of the key spring 5 is 5a is not in contact with the fixed contact 66.

The switch device 30 is configured such that the top portion 5a of the key spring 5 can be pressed by pressing the sheet 2 on which the key spring 2 as the movable contact is attached from the upper side (the other surface side). Reverse below. That is, as shown in FIG. 3(b), the top portion 5a of the key spring 5 is reversed downward by pressing the sheet 2 covering the top portion 5a of the key spring 5 from the upper side. Thereby, the keying spring 5 abuts against the fixed contact 66, thereby electrically connecting the fixed contact 66 and the contact member 67 via the keying spring 5. Moreover, at this time, the sheet 2 is deformed as shown in FIG. 3(b) in a state in which the top portion 5a of the keystroke spring 5 is reversed downward. When the pressing operation is released, the returning force of the key spring 5 is returned to the initial state shown in FIG. 3(a), and the fixed contact 66 and the contact member 67 are returned to the electrically insulated state.

Further, the amount of movement in which the top portion 5a of the key spring 5 at this time is moved in the up and down direction is referred to as an operation amount. Further, the tactile sensation in which the operation load is nonlinearly changed in accordance with the reverse operation of the top portion 5a of the keying spring 5 is referred to as an operational tactile sensation (keystroke sensation).

When it is desired to increase the amount of operation, the height of the dome shape of the key spring 5 is increased to increase the amount of movement in the reverse operation of the top portion 5a of the key spring 5. Further, when it is desired to increase the amount of operation, it is preferable that the cover sheet 21 and the protective sheet 23 are formed in a dome shape by embossing, and then the key spring 5 is attached.

Next, the shape of the slit 1 with the key spring of the present embodiment and the slit 20 in the switch device 30 using the same will be described.

As shown in FIG. 1, the plurality of slits 20 are formed in a spiral shape from a position outside the outer peripheral portion 5b (foot portion 5c) of the key spring 5 in a plan view toward the top portion 5a of the key spring 5. As shown in FIG. 10, when a radial imaginary line (straight line) RL centering on the top portion 5a of the key spring 5 is drawn, the slit 20 is located near the inner wall 4a of the accommodating portion 4 in plan view. The one end of the longitudinal direction and the center side formed toward the center are elongated opening shapes of the other end in the longitudinal direction. The width of the slit 20 in the short side direction is, for example, 0.2 mm. Such a slit 20 is easily processed by laser.

As shown in FIG. 10, when the virtual circle C1 at one end in the longitudinal direction of the slit 20 and the virtual circle C2 at the other end are drawn, the radial dimension of the two imaginary circles C1 and C2 is set to L1. The other end of the slit 20 in the longitudinal direction is located above the outer peripheral portion 5b of the key spring 5 in plan view, and as shown in Fig. 3(c), there is a gap with the key spring 5. The opening formed in the spacer sheet 22 is the size of the imaginary circle C1. The opening formed on the protective sheet 23 is the size of the imaginary circle C2.

As shown in FIG. 10, a plurality of slits 20 are disposed in such a manner that a radial imaginary line RL centering on the top portion 5a of the keying spring 5 traverses the slit 20. Therefore, when the sheet 2 is bulged in a dome shape in accordance with the shape of the key spring 5, the cover sheet 21 is elongated in the direction of the spiral between the plurality of slits 20 instead of the radial direction. That is, in the range of the radial dimension L1, the cover sheet 21 is more likely to elongate in the direction of the spiral. At this time, the tension generated by the elongation of the cover sheet 21 acts on the direction in which the swell of the key spring 5 is suppressed. However, by setting the plurality of slits 20 in a spiral shape, the tension can be reduced. In addition, when the top portion 5a of the key spring 5 is reversed downward by the pressing operation of pressing the sheet 2 to which the key spring 5 is attached from the upper side of the other surface side, the sheet 21 is covered. Since the tension is small and the slit 20 can be displaced in the width direction, the sheet 2 is easily deformed in a state in which the top portion 5a of the keying spring 5 is reversed downward. In this way, since the sheet 2 is formed in a spiral shape in a plurality of slits 20, even if the amount of reverse operation of the key spring 5 is increased, the sheet 2 can be followed. Therefore, even if the operation amount is set large, the belt The operational touch of the sheet 1 having the keystroke spring is not damaged.

As described above, in the sheet 1 with the keystroke spring of the present embodiment, the sheet 2 is provided at a position outside the outer peripheral portion 5b (foot portion 5c) of the keystroke spring 5 in plan view. A plurality of slits 20 are formed toward the top portion 5a of the keystroke spring 5 in a spiral shape. And, at a position corresponding to the formation range of the plurality of slits 20, the attachment is not attached The protective sheet 23 of the spring 5 is clicked. According to this aspect, in the operation of pressing the sheet 2 on which the key spring 5 is attached to the one side from the upper side to reverse the top portion 5a of the key spring 5 downward, the key sheet is made by protecting the sheet 23 When the spring 5 is reversely operated, the outer peripheral portion 5b is not attached to the sheet 2, so that the amount of operation can be increased. By providing the slit 20 having the spiral shape, the tension of the stretched sheet 2 can be reduced, and by the protective sheet 23, the outer peripheral portion 5b is not attached to the sheet when the key spring 5 is reversely moved. 2. Therefore, even if the operation amount is set large, the operation feel can be made good.

The switch device 30 of the present embodiment has a sheet 1 with a key spring formed with a slit 20 of a spiral shape, and the key spring 5 is used as a movable contact, and is located below the position corresponding to the key spring 5. A fixed contact 66 is provided. According to this aspect, in the switch device 30, the sheet 1 with the key spring formed by the slit 20 of the spiral shape allows the operation feeling to be good even if the operation amount is set large. Therefore, the switching device 30 can increase the amount of operation and has a good operational feel.

In the present embodiment, at least one of the plurality of slits 20 is formed on the radial imaginary line RL centering on the top portion 5a of the key spring 5. According to this aspect, since the plurality of slits 20 are disposed throughout, the followability to the operation of the keystroke spring 5 is preferable.

In the present embodiment, the protective sheet 23 is disposed at a position overlapping the plurality of slits 20 in plan view. According to this aspect, by not attaching to the portion of the key spring 5, the followability to the reverse operation is better, and the operational feel can be made good.

In the present embodiment, the spacer sheet 22 is disposed on one surface side of the cover sheet 21 with the protective sheet 23 interposed therebetween, and is provided with the accommodating portion 4 accommodating the key spring 5, and the outer peripheral portion of the key spring 5 in plan view 5b (foot portion 5c) is located inside the inner wall 4a of the accommodating portion 4, and the top portion 5a is disposed substantially at the center of the accommodating portion 4 so as to be attached to the cover sheet 21, and the plurality of slits 20 are used for the plan view. The cover sheet 21 is formed from the position of the inner wall 4a of the accommodating portion 4 toward the inner side. According to this aspect, the amount of movement in the reverse operation of the top portion 5a of the key spring 5 can be set by the shape of the key spring 5. And even if it is larger When the amount of movement is set, the tension of the stretched cover sheet 21 can be reduced by providing the slit sheet 20 on the cover sheet 21. Further, when the sheet 23 is protected, the outer peripheral portion 5b is not attached to the sheet 2 when the key spring 5 is reversely operated, so that the operational touch can be improved.

In the present embodiment, the sheet 2 has the adhesive layer 21a formed on the cover sheet 21, and the width of the slit 20 in the short-side direction is 0.2 mm. According to this aspect, since the cover sheet 21 has the adhesive layer 21a formed on the cover sheet 21, the top portion 5a of the key spring 5 can be attached to the cover sheet 21 via the adhesive layer 21a. Further, since the width of the slit 20 in the short-side direction is 0.2 mm, it is easy to perform processing by laser.

When the sheet 1 with the keystroke spring of the present embodiment is different from the sheet of the keystroke spring due to the configuration in which the slit is not formed, for example, in the state of being bonded to the key spring, The blasting amount of the keystroke spring is suppressed, resulting in a reduction in the amount of operation. Alternatively, it is an unstable bonding state in which the region where the key spring and the sheet are bonded is peeled off, and the reattachment and peeling are repeated, thereby affecting the operational touch.

Further, the sheet 1 with the keystroke spring of the present embodiment is particularly effective when it is desired to set the amount of movement in the reverse operation of the top portion 5a of the key spring 5 without thickening the spacer sheet 22. In order to increase the height of the dome-shaped spring of the key spring 5 without thickening the spacer sheet 22, the height at which the cover sheet 21 is dome-shaped in accordance with the shape of the key spring 5 must be high. Since the slit 20 is provided on the cover sheet 21 so that even if the height of the dome-shaped bulge is increased, the tension of the stretched sheet 2 is small, so that the blasting amount of the key spring 5 is not Suppressed. Therefore, even if the spacer sheet 22 of the key spring 5 is not thickened, the amount of movement in the reverse operation of the top portion 5a of the key spring 5 can be increased, and the cover sheet 21 can be made to follow the key spring with respect to the surroundings. The shape of 5 is increased in height in a dome shape. Therefore, the operation position of the pressing operation from the upper side is more clear, and the erroneous operation can be reduced, and the followability to the reverse operation is better, so that the operational touch can be made good.

(Example of variation of the shape of the slit)

Preferably, the number or length of the slits 20 is optimized as appropriate depending on the planar size or the amount of operation of the keystroke spring 5. Further, the shape of the slit can be variously changed in addition to those shown in Fig. 10 . Fig. 11 is a schematic view showing a variation of the shape of the slit. Fig. 11 (a) is a slit 25 formed in a spiral shape in which one end side of the vicinity of the inner wall 4a of the accommodating portion 4 is formed by a straight line. Furthermore, there are six slits 25 arranged. Fig. 11 (b) is a slit 26 formed in a spiral shape, and is formed by a straight line from one end side of the vicinity of the inner wall 4a of the accommodating portion 4 to the other end side on the center side in plan view. Furthermore, there are 10 slits 26 arranged. Fig. 11(c) is applicable to the horizontally long type of keystroke spring 51, and a linear slit 27 along the longitudinal direction of the keying spring 51 is combined with the slit 20 formed in a spiral shape. In this case, the imaginary line connecting the other end of the slit 20 has a shape in which two semicircles are connected by a straight line, but is directly set as a symbol of the imaginary circle C2. In either case, the length or the number of slits can be optimized to exert the effects described in the embodiment. Furthermore, when the length of the slit can be short, the imaginary circle C2 at the other end shown in FIG. 10 can be located at a protruding position of the foot portion 5c of the keying spring 5 (the circular shape of the key spring 5) Part) The form of the position on the side of the inner wall 4a.

(First modification of the first embodiment)

A first modification of the first embodiment will be described with reference to Fig. 4 . Fig. 4 is a perspective view showing a sheet 11 with a keystroke spring and a switch device 31 according to a first modification of the first embodiment, wherein Fig. 4(a) is a plan view, and Fig. 4(b) is a view of Fig. 4(a). ) The profile of the VI-VI line is cut. In addition, members of the same members as those of the first embodiment are denoted by the same reference numerals, and the description of the members will be omitted.

As shown in FIG. 4, the sheet 2 in the first modification has a housing portion 4 in which a plurality of keystroke springs 5 can be arranged in a plane. The sheet 11 with a keystroke spring is composed of a plurality of keystroke springs 5, and a sheet 2 formed by laminating a cover sheet 21, a spacer sheet 22, and a protective sheet 23. In the switch device 31, a fixed contact 66 and a contact member 67 are disposed on the surface of the base 3 of the sheet 11 with the key spring and at positions corresponding to the respective click springs 5.

When the arrangement pitch of the plurality of keystroke springs 5 is a sufficient distance, it is substantially the same as the sheet 1 with the key spring and the switch device 30 in which a plurality of the first embodiment are arranged. In the present variation, the distance between the plurality of keystroke springs 5 is not fixed. As shown in FIG. 4, a part of the keystroke springs 5 are disposed in close proximity to the adjacent keystroke springs 5. It is characterized in that the cover sheet 21 is formed with a slit 28 formed in such a manner that the length in the longitudinal direction is shorter than the slit 20 at a position corresponding to the planar position of the proximity key spring 5.

In the present variation, the number of the key springs 5 is plural, and a plurality of slits 20 are formed with respect to the respective key springs 5. According to this aspect, since the sheet 11 with the key spring and the switch device 31 have a plurality of keystroke springs 5, one group can correspond to a plurality of operation portions such as a keyboard.

In the present variation, the number of the key springs 5 is plural, and in the plurality of slits corresponding to the key springs 5 arranged in the close contact state, the slits 28 disposed on the proximal side are formed shorter than the slits 20. According to this aspect, even in the keying spring 5 in the close contact state, by providing a plurality of slits including the short slits 28, the tension of the stretched cover sheet 21 can be reduced, so even the keying spring 5 In the vicinity, the operational touch can be hardly lowered compared to the portion of the other key springs 5. Therefore, even if the sheet 11 with the keystroke spring is set to a large amount of operation, the touch feeling can be made good. Further, the switching device 31 can increase the amount of operation and has a good operational touch.

(Second modification of the first embodiment)

Hereinafter, the switch device 32 in the second modification of the first embodiment will be described with reference to Fig. 5 . Fig. 5 is a perspective view showing a switch device 32 according to a second modification of the first embodiment, Fig. 5(a) is a plan view, and Fig. 5(b) is cut by a VV line of Fig. 5(a). Pattern profile. In addition, members of the same members as those of the first embodiment are denoted by the same reference numerals, and the description of the members will be omitted.

As shown in FIG. 5, the switch device 32 of the present modification includes a housing 68 and an operating member 69. The housing 68 is provided with a sheet 1 with a keystroke spring, and a fixed contact 66 is disposed. The base 3 of the contact member 67. The sheet 1 with the keystroke spring is composed of a key spring 5 and a sheet 2 formed by laminating the cover sheet 21, the spacer sheet 22, and the protective sheet 23. The operating member 69 protrudes from the opening of the housing 68 and is configured to press the shape of the top portion 5a of the keying spring 5 via the cover sheet 21. In addition, the casing 68 may be made of an insulating resin material, and the fixed contact 66 and the contact member 67 may be disposed on the casing 68.

In the switch device 32, the operation member 69 is pressed from the upper side, and the top portion 5a of the key spring 5 is reversed downward via the cover sheet 21. Thereby, the keying spring 5 abuts against the fixed contact 66, thereby electrically connecting the fixed contact 66 and the contact member 67 via the keying spring 5.

In the present variation, the switch device 32 includes a housing 68 and an operating member 69, and has a sheet 1 with a keystroke spring formed with a slit 20 of a spiral shape, and uses the key spring 5 as a movable contact, and A fixed contact 66 is disposed on the lower side corresponding to the position of the key click spring 5. According to this aspect, in the switching device 30, the operation amount can be increased by the sheet 1 with the key spring formed with the slit 20 of the spiral shape, and the opposite of the key spring 5 can be made by the protective sheet 23. The outer peripheral portion 5b does not adhere to the sheet 2 during the turning operation, and therefore has a good operational feel.

Further, a switching device including a plurality of operating members 69 can be constructed in the same manner as the switching device 32 of the present modification. For example, the housing of the sheet 11 with the keystroke spring according to the first modification of the first embodiment may be arranged, and a plurality of operation members 69 may be protruded from the plurality of openings, and each of them The operating member 69 can press the top portion 5a of the keying spring 5 via the cover sheet 21. According to this aspect, since there are a plurality of keystroke springs 5, one group can correspond to a plurality of operation portions such as a keyboard.

[Second Embodiment]

Hereinafter, the sheet 13 with the key spring and the switch device 33 in the second embodiment will be described with reference to Figs. 6, 7, and 10. Fig. 6 is a perspective view showing a sheet 13 with a keystroke spring according to a second embodiment and a switch device 33 using the same, Fig. 6(a) is a plan view, and Fig. 6(b) is a front view of the mode. Figure 7 is obtained by cutting the line VII-VII of Figure 6 Fig. 7(a) is a cross-sectional view of the initial state, Fig. 7(b) is a schematic cross-sectional view of the operating state, and Fig. 7(c) is a portion B of Fig. 7(a) Enlarge the illustration. In addition, members of the same members as those of the first embodiment are denoted by the same reference numerals, and the description of the members will be omitted.

As shown in FIGS. 6 and 7, the switch device 33 is a combination of a sheet 13 with a key spring having a key spring 5 and a switch unit 60 on which a fixed contact 66 and a movable contact 65 are disposed. As shown in FIG. 7, the sheet 13 with a keystroke spring is composed of a keystroke spring 5, and a sheet 2 formed by laminating a cover sheet 21, a spacer sheet 22, and a protective sheet 23.

The key spring 5 is formed by processing a conductive metal plate such as phosphor bronze into a substantially circular shape having a dome-shaped bulging portion. As shown in Fig. 7(a), the key spring 5 is in the shape of a dome having a top portion 5a. Further, the outer peripheral portion 5b of the key spring 5 is provided with four leg portions 5c. In a state where the outer peripheral portion 5b of the key spring 5 is fixed, the top portion 5a of the key spring 5 can be reversed downward by a pressing operation from the upper side of the top portion 5a of the keying spring 5.

The cover sheet 21 is obtained by processing a flexible film material such as PET (polyethylene terephthalate). A slit 20 having a spiral shape is formed on the cover sheet 21. Such a slit 20 is formed by processing the sheet 21 by laser processing. In addition to the transparent film material, the cover sheet 21 may be, for example, a film material in which a white pigment is mixed and colored in white, or a film material in which a black pigment is mixed and colored in black. Further, the cover sheet 21 is embossed in advance so that the central portion protrudes upward.

The spacer sheet 22 is formed by processing a flexible film material such as PET. The spacer sheet 22 is formed with an opening for accommodating the key spring 5.

The protective sheet 23 is formed by processing a flexible film material such as PET. As shown in FIGS. 6 and 7, the protective sheet 23 is formed with an opening having a smaller diameter than the opening formed in the spacer sheet 22, and the entire surface other than the opening is bonded to one surface side of the cover sheet 21. Further, one surface side of the protective sheet 23 is bonded to the spacer sheet 22 except for a region corresponding to the opening of the spacer sheet 22. The spacer sheet 22 is attached to the cover sheet via the protective sheet 23 The sheet 21 covers the opening of the spacer sheet 22, whereby the space of the accommodating portion 4 is formed. Further, the protective sheet 23 is embossed in advance so that the periphery of the opening protrudes upward.

As shown in FIG. 7(a), the key spring 5 is housed in the central portion of the accommodating portion 4. As shown enlarged in FIG. 7(c), an adhesive layer 21a is formed on one surface of the cover sheet 21 on the side where the sheet 2 is in contact with the key spring 5. Thereby, the cover sheet 21 of the sheet 2 is bonded to the protective sheet 23 via the adhesive layer 21a. Further, the sheet 2 is bonded to the top portion 5a of the key spring 5 via the adhesive layer 21a formed on the cover sheet 21. Moreover, the protective sheet 23 is bonded to the spacer sheet 22 via the adhesive layer 23a. Therefore, the periphery of the opening of the protective sheet 23 is bulged in a dome shape in accordance with the shape of the key spring 5, and the cover sheet 21 is bulged in a dome shape in accordance with the shape of the protective sheet 23 and the key spring 5.

Thus, the sheet 13 with the keystroke spring is composed of the key spring 5 and the sheet 2 in which the cover sheet 21, the spacer sheet 22, and the protective sheet 23 are laminated. Further, as shown in FIG. 7(c), the opening of the protective sheet 23 is spaced apart from the inner wall 4a of the accommodating portion 4 by a specific size, and the adhesive layer 21a of the cover sheet 21 is not in contact with the outer peripheral portion 5b of the keying spring 5. . The slit 20 is formed at a position overlapping the protective sheet 23 in plan view.

The switch unit 60 is a combination of a film sheet 61 on which the movable contact 65 is disposed, a spacer sheet 62, and a susceptor 63 in which the fixed contact 66 is disposed to face the movable contact 65.

The film sheet 61 is obtained by processing a film material having insulation and flexibility such as PET. A conductive pattern is formed on one surface of the film sheet 61, and one of the conductive patterns is a movable contact 65.

The susceptor 63 is formed by processing an insulating film material such as PET. A conductive pattern is formed on the surface of the susceptor 63 opposite to the film sheet 61, and one of the conductive patterns is a fixed contact 66. Further, the susceptor 63 may use a flexible film material similarly to the film sheet 61.

The spacer sheet 62 is formed by processing a film material such as PET. As shown in Fig. 7 (a), the spacer sheet 62 is disposed at least at a peripheral portion 5b (foot portion 5c) between the film sheet 61 and the key spring 5 when the sheet 13 with the key spring and the switch portion 60 are assembled. Overlapping locations.

The movable contact 65 and the fixed contact 66 are disposed on the lower side corresponding to the plane position of the key spring 5 when the sheet 13 with the key spring and the switch unit 60 are assembled. Since the fixed contact 66 is disposed in a state of being electrically insulated from the movable contact 65, and the key spring 5 is dome-shaped, as shown in FIG. 7(a), in the initial state, the top of the key spring 5 is 5a is not in contact with the movable contact 65.

The switch device 33 is configured such that the top portion 5a of the key spring 5 is reversed downward by a pressing operation of pressing the sheet 2 to which the key spring 5 is attached from the upper side (the other surface side). That is, by pressing the sheet 2 covering the top portion 5a of the key spring 5 from the upper side, the top portion 5a of the key spring 5 is reversed downward as shown in Fig. 7(b). Thereby, the key spring 5 abuts against the film sheet 61 and presses the film sheet 61, thereby electrically connecting the movable contact 65 and the fixed contact 66 via the film sheet 61. Moreover, at this time, the sheet 2 follows the state in which the top portion 5a of the key spring 5 is reversed downward, and is deformed as shown in Fig. 7(b). When the pressing operation is released, the returning force of the key spring 5 is returned to the initial state shown in FIG. 7(a), and the movable contact 65 and the fixed contact 66 are returned to the electrically insulated state.

Further, the amount of movement in which the top portion 5a of the key spring 5 at this time is moved in the up and down direction is referred to as an operation amount. Further, the tactile sensation in which the operation load is nonlinearly changed in accordance with the reverse operation of the top portion 5a of the keying spring 5 is referred to as an operational tactile sensation (keystroke sensation).

When it is desired to increase the amount of operation, the height of the dome shape of the key spring 5 is increased to increase the amount of movement in the reverse operation of the top portion 5a of the key spring 5. Further, when it is desired to increase the amount of operation, it is preferable that the cover sheet 21 and the protective sheet 23 are formed in a dome shape by embossing, and then the key spring 5 is attached.

Next, the shape of the slit 13 with the key spring of the present embodiment and the slit 20 in the switch device 33 using the same will be described.

As shown in FIG. 6, the plurality of slits 20 are formed in a spiral shape from a position outside the outer peripheral portion 5b (foot portion 5c) of the key spring 5 in a plan view toward the top portion 5a of the key spring 5. As shown in FIG. 10, when a radial imaginary line (straight line) RL centering on the top portion 5a of the key spring 5 is drawn, the slit 20 has an elongated opening shape which is formed in a plan view. The position in the vicinity of the inner wall 4a of the accommodating portion 4 is one end in the longitudinal direction, and the center side formed toward the center is the other end in the longitudinal direction. The width of the slit 20 in the short side direction is, for example, 0.2 mm. Such a slit 20 is easily processed by laser.

As shown in FIG. 10, when the imaginary circle C1 at the one end and the imaginary circle C2 at the other end are drawn, the radial dimension of the two imaginary circles C1 and C2 is set to L1. The other end of the slit 20 in the longitudinal direction is located above the outer peripheral portion 5b of the key spring 5 in plan view, and as shown in Fig. 7(c), there is a gap with the key spring 5. The opening formed in the spacer sheet 22 is the size of the imaginary circle C1. The opening formed on the protective sheet 23 is the size of the imaginary circle C2.

As shown in FIG. 10, a plurality of slits 20 are disposed in such a manner that a radial imaginary line RL centering on the top portion 5a of the keying spring 5 traverses the slit 20. Therefore, when the sheet 2 is bulged into a dome shape in accordance with the shape of the key spring 5, the cover sheet 21 is elongated in the direction of the spiral between the plurality of slits 20 instead of the radial direction. That is, in the range of the radial dimension L1, the cover sheet 21 is more likely to elongate in the direction of the spiral. At this time, the tension generated by the elongation of the cover sheet 21 acts on the direction in which the swell of the key spring 5 is suppressed, but by setting the plurality of slits 20 in a spiral shape, the tension can be reduced. In addition, when the top portion 5a of the key spring 5 is reversed downward by the pressing operation of pressing the sheet 2 to which the key spring 5 is attached from the upper side of the other surface side, the sheet 21 is covered. Since the tension is small and the slit 20 can be displaced in the width direction, the sheet 2 is easily deformed in a state in which the top portion 5a of the keying spring 5 is reversed downward. In this way, since the sheet 2 is formed in a spiral shape in a plurality of slits 20, even if the amount of reverse operation of the key spring 5 is increased, the sheet 2 can be followed. Therefore, even if the operation amount is set large, the belt The operational touch of the sheet 13 with the keystroke spring is not damaged.

As described above, in the sheet 13 with the keystroke spring of the present embodiment, The sheet 2 is provided with a plurality of slits 20 formed in a spiral shape from a position on the outer side of the outer peripheral portion 5b (the leg portion 5c) of the keystroke spring in a plan view toward the top portion 5a of the key spring 5. According to this aspect, in the operation of pressing the sheet 2 on which the key spring 5 is attached to the one side from the upper side and inverting the top portion 5a of the key spring 5 downward, the slit 20 is provided with a spiral shape. Since the tension of the stretched sheet 2 can be reduced, even if the operation amount is set large, the operational feeling can be made good.

The switch device 33 of the present embodiment has a sheet 13 with a key spring formed with a slit 20 of a spiral shape, and a fixed contact 66 and a movable contact are disposed below the position corresponding to the key spring 5. The switch portion 60 of 65. According to this aspect, in the switch device 33, the sheet 13 with the key spring formed by the slit 20 of the spiral shape allows the operation feeling to be good even if the operation amount is set large. Therefore, the switching device 33 can increase the amount of operation and has a good operational feel.

In the present embodiment, at least one of the plurality of slits 20 is formed on the radial imaginary line RL centering on the top portion 5a of the key spring 5. According to this aspect, since the plurality of slits 20 are disposed throughout, the followability to the operation of the keystroke spring 5 is preferable.

In the present embodiment, the protective sheet 23 is disposed at a position overlapping the plurality of slits 20 in plan view. According to this aspect, by not attaching to the portion of the key spring 5, the followability to the reverse operation is better, and the operational feel can be made good.

In the present embodiment, the spacer sheet 22 is disposed on one surface side of the cover sheet 21, and is provided with the accommodating portion 4 accommodating the key spring 5, and the outer peripheral portion 5b (foot portion 5c) in the plan view of the key spring 5 The position is located on the inner side of the inner wall 4a of the accommodating portion 4, and the top portion 5a is disposed substantially at the center of the accommodating portion 4 so as to be attached to the cover sheet 21, and the plurality of slits 20 are provided inside the accommodating portion 4 in plan view. The position of the wall 4a is formed on the cover sheet 21 so as to face inward. According to this aspect, by the shape of the key spring 5, the amount of movement in the reverse operation of the top portion 5a of the key spring 5 can be set. Moreover, even when the amount of movement is set large, The tension of the stretched cover sheet 21 can also be reduced by providing the slits 20 on the cover sheet 21 with a spiral shape. Further, when the protective sheet 23 is used, the outer peripheral portion 5b is not attached to the sheet 2 when the key spring 5 is reversely operated, so that the operational touch can be improved.

In the present embodiment, the sheet 2 has the adhesive layer 21a formed on the cover sheet 21, and the width of the slit 20 in the short-side direction is 0.2 mm. According to this aspect, since the cover sheet 21 has the adhesive layer 21a formed on the cover sheet 21, the top portion 5a of the key spring 5 can be attached to the cover sheet 21 via the adhesive layer 21a. Further, since the width of the slit 20 in the short-side direction is 0.2 mm, such a slit 20 can be easily processed by laser.

When the sheet 13 with the keystroke spring of the present embodiment is different from the sheet spring 13 which is not formed with a slit or the like, it is difficult to follow the sheet of the key spring, for example, in a state of being bonded to the key spring. The blasting amount of the keystroke spring is suppressed, resulting in a reduction in the amount of operation. Alternatively, it is an unstable bonding state in which the region where the key spring and the sheet are bonded is peeled off, and the reattachment and peeling are repeated, thereby affecting the operational touch.

Further, the sheet 13 with the keystroke spring of the present embodiment is particularly effective when it is desired to set the amount of movement in the reverse operation of the top portion 5a of the key spring 5 without thickening the spacer sheet 22. In order to increase the height of the dome-shaped spring of the key spring 5 without thickening the spacer sheet 22, the height at which the cover sheet 21 is bulged in a dome shape in accordance with the shape of the key spring 5 must be high. By providing the slit sheet 20 on the cover sheet 21, even if the height of the bulged dome is increased, the tension of the stretched sheet 2 is small, so that the blasting amount of the key spring 5 is not Suppressed. Therefore, even if the spacer sheet 22 of the key spring 5 is not thickened, the amount of movement in the reverse operation of the top portion 5a of the key spring 5 can be increased, and the cover sheet 21 can be raised relative to the periphery in accordance with the keystroke spring 5. The shape is bulged into a dome-like height. Therefore, the operation position of the pressing operation from the upper side is more clear, and the erroneous operation can be reduced, and the followability to the reverse operation is better, so that the operational touch can be made good.

(Example of variation of the shape of the slit)

It is preferable to make the slit 20 as appropriate according to the plane size or the operation amount of the key spring 5 The number of bars or length is optimized. Further, the shape of the slit can be variously changed in addition to those shown in Fig. 10 . Fig. 11 is a schematic view showing a variation of the shape of the slit. Fig. 11 (a) is a slit 25 formed in a spiral shape in which one end side of the vicinity of the inner wall 4a of the accommodating portion 4 is formed by a straight line. Furthermore, there are six slits 25 arranged. Fig. 11 (b) is a slit 26 formed in a spiral shape, and is formed by a straight line from one end side of the vicinity of the inner wall 4a of the accommodating portion 4 to the other end side on the center side in plan view. Furthermore, there are 10 slits 26 arranged. Fig. 11(c) is applicable to the horizontally long keystroke spring 51, and the slit 20 formed in a spiral shape is combined with a linear slit 27 along the longitudinal direction of the keying spring 51. In this case, the imaginary line connecting the other end of the slit 20 has a shape in which two semicircles are connected by a straight line, but is directly set as a symbol of the imaginary circle C2. In either case, the length or the number of slits can be optimized to exert the effects described in the embodiment. Furthermore, when the length of the slit is also short, the imaginary circle C2 at the other end shown in FIG. 10 may be located at a protruding position of the foot portion 5c of the keying spring 5 (the circle of the keystroke spring 5) The shape of the portion on the side of the inner wall 4a.

(First modification of the second embodiment)

A first modification of the second embodiment will be described with reference to Fig. 8 . Fig. 8 is a perspective view showing a sheet 14 with a keystroke spring and a switch device 34 according to a first modification of the second embodiment, wherein Fig. 8(a) is a plan view, and Fig. 8(b) is a view of Fig. 8(a). A cross-sectional view of the pattern obtained by cutting the VIII-VIII line. In addition, members of the same members as those of the first embodiment and the second embodiment are denoted by the same reference numerals, and the description of the members will be omitted.

As shown in FIG. 8, the sheet 2 in the first modification has a housing portion 4 in which a plurality of keystroke springs 5 can be arranged in a plane. The sheet 14 with the keystroke spring is composed of a plurality of keystroke springs 5 and a sheet 2 formed by laminating the cover sheet 21, the spacer sheets 22, and the protective sheets 23. In the switch device 34, a fixed contact 66 and a contact member 67 are disposed on the surface of the base 3 of the sheet 14 with the key spring, and at positions corresponding to the respective click springs 5.

If the arrangement distance of the plurality of keystroke springs 5 is a sufficient distance, the arrangement is substantially The plurality of sheets 13 with the key spring and the switch device 33 of the second embodiment are the same. In the present variation, a plurality of keystroke springs 5 are disposed at a fixed distance therebetween. As shown in FIG. 8, a part of the keystroke springs 5 are disposed in close proximity to the adjacent keystroke springs 5. It is characterized in that the cover sheet 21 is formed with a slit 28 formed in such a manner that the length in the longitudinal direction is shorter than the slit 20 at a position corresponding to the planar position of the proximity key spring 5.

In the present variation, the number of the key springs 5 is plural, and a plurality of slits 20 are formed with respect to the respective key springs 5. According to this aspect, since the sheet 14 with the key spring and the switch device 34 have a plurality of keystroke springs 5, one group can correspond to a plurality of operation portions such as a keyboard.

In the present variation, the number of the keystroke springs 5 is plural, and in the plurality of slits corresponding to the keystroke springs 5 arranged in the proximity state, the slits 28 disposed on the proximal side are shorter than the slits 20 form. According to this aspect, even in the keying spring 5 in the close contact state, by providing the plurality of slits including the short slits 28, the tension of the stretched cover sheet 21 can be reduced, so even the keying spring 5 In the vicinity, the operational touch can be hardly lowered compared to the portion of the other key springs 5. Therefore, even if the sheet 14 with the keystroke spring is set to a large amount of operation, the operation feeling can be made good. Further, the switching device 34 can increase the amount of operation and has a good operational feel.

(Second variation of the second embodiment)

Hereinafter, the switch device 35 in the second modification of the second embodiment will be described with reference to Fig. 9 . Fig. 9 is a perspective view showing a switch device 35 according to a second modification of the second embodiment, wherein Fig. 9(a) is a plan view, and Fig. 9(b) is cut by the IX-IX line of Fig. 9(a). Get the model profile. In addition, members of the same members as those of the first embodiment and the second embodiment are denoted by the same reference numerals, and the description of the members will be omitted.

As shown in FIG. 9, the switch device 35 of the present modification includes a housing 68 and an operating member 69, and a thin plate 13 with a key spring is assembled in the housing 68, and a fixed contact 66 and a movable contact are disposed. 65 switch unit 60. The sheet 13 with the keystroke spring is made up of a keystroke spring 5. A sheet 2 having a cover sheet 21 and a spacer sheet 22 laminated thereon. The switch unit 60 is a combination of a film sheet 61 on which the movable contact 65 is disposed, a spacer sheet 62, and a susceptor 63 in which the fixed contact 66 is disposed to face the movable contact 65. The operating member 69 protrudes from the opening of the housing 68 and is configured to press the shape of the top portion 5a of the keying spring 5 via the cover sheet 21. In addition, the casing 68 may be made of an insulating resin material, and the fixed contact 66 and the movable contact 65 may be disposed on the casing 68.

In the switch device 35, the operation member 69 is pressed from the upper side, and the top portion 5a of the key spring 5 is reversed downward via the cover sheet 21. Thereby, the key spring 5 abuts against the film sheet 61 and presses the film sheet 61, thereby electrically connecting the movable contact 65 and the fixed contact 66 via the film sheet 61.

The switch device 35 of the present modification includes a housing 68 and an operation member 69, and has a sheet 13 with a key spring formed with a slit 20 of a spiral shape, and is disposed at a lower side of a position corresponding to the key spring 5 The switch portion 60 includes a fixed contact 66 and a movable contact 65. According to this aspect, in the switching device 35, the operation amount can be increased by the sheet 13 with the key spring formed with the slit 20 of the spiral shape, and the opposite of the key spring 5 can be made by protecting the sheet 23. The outer peripheral portion 5b does not adhere to the sheet 2 during the turning operation, and therefore has a good operational feel.

Further, a switching device including a plurality of operating members 69 can be configured in the same manner as the switching device 34 of the first modified example of the second embodiment. For example, the housing of the sheet 14 with the keystroke spring according to the first modification of the second embodiment may be arranged, and a plurality of operation members 69 may be protruded from the plurality of openings, and each of them The operating member 69 can press the top portion 5a of the keying spring 5 via the cover sheet 21. According to this aspect, since there are a plurality of keystroke springs 5, one group can correspond to a plurality of operation portions such as a keyboard.

1‧‧‧Sheet with key spring

2‧‧‧Sheet

3‧‧‧Base

4‧‧‧ Housing Department

4a‧‧‧ inner wall

5‧‧‧Key spring

5a‧‧‧ top

5b‧‧‧The outer part

5c‧‧‧foot

20‧‧‧ slit

21‧‧‧ Covering sheets

22‧‧‧ spacer sheet

23‧‧‧Protective sheet

30‧‧‧Switching device

66‧‧‧Fixed joints

67‧‧‧Contact components

Claims (10)

A sheet with a keystroke spring having a dome-shaped keystroke spring and a sheet on which one side of the keystroke spring is attached; characterized by: pressing from the upper side of the top of the keystroke spring In operation, the top portion of the keystroke spring is reversed downward, and the sheet has flexibility and is provided with a plurality of slits for outer side of the outer peripheral portion of the keystroke spring in plan view. The position is formed in a spiral shape toward the top of the keystroke spring, and a protective sheet that is not attached to the key spring is provided at a position corresponding to a range in which the plurality of slits are formed. A sheet with a keystroke spring according to claim 1, wherein at least one of the plurality of slits is formed on a radial imaginary line centering on the top of the keystroke spring. A sheet with a keystroke spring according to claim 1, wherein the protective sheet is disposed at a position overlapping the plurality of slits in a plan view. A sheet with a keystroke spring according to claim 2, wherein the protective sheet is disposed at a position overlapping the plurality of slits in a plan view. The sheet with a keystroke spring according to claim 1, wherein the sheet has the protective sheet, the cover sheet, and the spacer sheet, and the spacer sheet is disposed on the one surface side, and is provided with a housing portion for accommodating the key spring, the key The outer peripheral portion is located inside the inner wall of the accommodating portion in a plan view, and the top portion is disposed substantially at the center of the accommodating portion so as to be attached to the cover sheet, and the plurality of slits are The cover sheet is formed in a plan view from the position of the inner wall of the accommodating portion toward the inner side. The sheet of the keystroke spring of claim 1, wherein the above-mentioned keystroke spring has a plurality of And the plurality of slits are formed with respect to each of the keystroke springs. The sheet with a keystroke spring of claim 6, wherein the plurality of key springs are plural, and the plurality of slits corresponding to the keystroke springs disposed in a proximity state are disposed on the plurality of slits on the proximal side One of the slits is formed to be shorter than the other slits. A sheet of a keystroke spring according to claim 5, wherein said sheet has an adhesive layer, and said slit has a width in a short side direction of 0.2 mm. A switch device characterized by having a sheet with a keystroke spring according to any one of claims 1 to 8, and using the above-mentioned keystroke spring as a movable contact, and corresponding to the position of the above-mentioned keystroke spring Fixed contacts are arranged on the lower side. A switch device having a sheet with a keystroke spring according to any one of claims 1 to 8, and configured to include a fixed contact and a movable joint on a lower side of a position corresponding to the keystroke spring Point switch section.