JP3256471B2 - Switch sheet for key switch unit, method of manufacturing the same, and key switch unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch sheet for a key switch unit which is a component of a key switch unit used for a portable telephone, a keyboard, a portable terminal, or the like, a method for manufacturing the same, and a key switch unit. .

[0002]

2. Description of the Related Art In recent years, portable telephones have rapidly become widespread in conjunction with miniaturization and price reduction. A switch used to conduct the contacts of numeric keys and various function keys of the portable telephone has been proposed. The key switch unit 1 shown in FIG. 10 can be used because the thickness can be reduced, a mechanically stable feel can be obtained, the timing at the time of mechanical reversal is equal to the timing of electrical contact, and the device is easy to use. Has been adopted. The key switch unit 1 is configured by attaching a metal dome D in the form of a contact lens to a switch sheet 2 for a key switch unit. Although not shown in detail, the key switch unit is directly mounted on a substrate disposed on a mobile phone body. The units are arranged to form contacts that are electrically connected by a metal dome.

[0005] As shown in FIG. 9, a switch sheet 2 for a key switch unit includes a film separator 3.
And a processing tape 4 stuck so that the adhesive surface is in close contact with the release surface of the film separator 3.
a, while forming the insertion hole 3b through which the metal dome D can be inserted, the communication groove 3c communicating between the adjacent insertion holes 3b, and the LED illumination hole 3d, simultaneously punching the processing tape 4 into a set shape with a punch or the like; An air release hole 4a is formed in the processing tape 4 corresponding to the communication groove 3c of the film separator 3 (see, for example, Japanese Patent Application Laid-Open No. H8-11268 filed by the applicant).

The switch sheet 2 for a key switch unit is delivered to a processing maker, and the processing maker attaches a metal dome D to the adhesive surface on the back side of the processing tape 4 through an insertion hole 3b formed in the film separator 3. Thus, the key switch unit 1 is manufactured. Thereafter, a surface sheet on which numerals, symbols of various functions, alphabets, and the like are printed is attached to the surface of the switch sheet 1, and the switch sheet 1 is arranged on the main body of the mobile phone through the positioning holes 3a.

[0005]

By the way, in the above-mentioned key switch unit, when the metal dome is pressed, the touch of the metal dome is not impaired.
It is necessary to release the air inside the metal dome. For this reason, as described above, an air release hole is formed in the processing tape so that when the metal dome is pressed, air in the internal space of the metal dome is released to the outside.

As a result, between the time when the switch sheet is manufactured and delivered to the processing maker or the time when the metal dome is stuck at the processing maker, an air release hole formed in the processing tape depending on the surrounding environment. Dust can enter through the In this case, dust that has entered through the air release holes of the processing tape adheres to the adhesive surface on the back surface side of the processing tape, causing quality deterioration such as impeding the smooth attachment of the metal dome. In addition, when it adheres to the concave surface (contact portion) of the metal dome, there is a possibility that a contact failure may occur.

The present invention has been made in view of such a problem, and it is possible to reliably prevent dust from entering and adhering to the adhesive surface side of a processing tape to which a metal dome is adhered. A switch sheet for a key switch unit is provided.

The present invention also automatically manufactures a switch sheet for a key switch unit that can reliably prevent dust from entering and adhering to the adhesive surface side of a processing tape to which a metal dome is attached. And a method for manufacturing a switch sheet for a key switch unit.

Further, the present invention reliably prevents dust from entering and adhering to the adhesive surface side of the processing tape to which the metal dome is adhered, and does not impair the feel of the metal dome when pressed. A key switch unit is provided.

[0010]

According to a first aspect of the present invention, there is provided a switch sheet for a key switch unit, comprising: a film separator; and a spacer adhered to the release surface of the film separator so that the adhesive surface is in close contact with the release surface. And a processing tape stuck so that the adhesive surface is in close contact with the upper surface of the spacer. The plurality of insertion holes through which the metal dome can be inserted into at least the spacer and the film separator and the adjacent insertion holes are connected. A communication groove is formed.

According to a second aspect of the present invention, there is provided a switch sheet for a key switch unit, comprising: a film separator; a spacer adhered so that an adhesive surface is in close contact with a release surface of the film separator; It consists of a processing tape attached so that the adhesive surface is in close contact with the upper surface, a plurality of positioning holes are formed in the film separator, and a plurality of insertion holes that can insert a metal dome through the spacer and the film separator A communication groove connecting the hole and the adjacent insertion hole is formed, and a plurality of LED illumination holes are formed at positions separated from the insertion hole and the communication groove in the processing tape, the spacer, and the film separator. It is a feature.

Further, in the method for manufacturing a switch sheet for a key switch unit according to a third aspect of the present invention, an application tape is attached to a lower surface of a film separator having a release surface as an upper surface so that an adhesive surface thereof is in close contact with the application tape. At the same time, after attaching the spacer to the release surface of the film separator so that the adhesive surface thereof is in close contact, the plurality of insertion holes through which the metal dome can be inserted into at least the spacer and the film separator and the adjacent insertion holes are connected. After forming a communication groove, and then sticking a processing tape on the upper surface of the spacer so that its adhesive surface is in close contact, punching at least the processing tape and the spacer into a set shape, these laminated processing tapes , Punched while pulling out the spacer, film separator and application tape together It is characterized in that is peeled by winding the processing tape and spacer circumference.

According to a fourth aspect of the present invention, there is provided a method of manufacturing a switch sheet for a key switch unit, wherein an application tape is attached to a lower surface of a film separator having a release surface as an upper surface so that an adhesive surface thereof is in close contact with the application tape. At the same time, after affixing the spacer to the release surface of the film separator so that the adhesive surface is in close contact with the spacer, the communication that connects the plurality of insertion holes through which the metal dome can be inserted into the spacer and the film separator and the adjacent insertion hole. After forming a groove and then attaching a processing tape to the upper surface of the spacer so that its adhesive surface is in close contact, a plurality of positioning holes are formed in the processing tape, the spacer and the film separator, and at the same time, the processing is performed. Stamping tape and spacers into set shapes, and further, processing tapes, spacers and film separators Insertion hole and to form a hole for LED illumination in a position spaced from the connecting groove, these processing tape,
It is characterized in that the peripheral processing tape and the spacer, which have been punched out, are wound up and peeled while the spacer, the film separator and the application tape are pulled out integrally.

According to a fifth aspect of the present invention, there is provided a key switch unit comprising: a film separator; a spacer adhered to the release surface of the film separator such that the adhesive surface is in close contact with the film separator; A contact tape comprising a processing tape stuck so that the surfaces are in close contact with each other, and a plurality of metal domes, and a plurality of through holes through which the metal dome can be inserted into at least the spacer and the film separator, and a communication connecting adjacent through holes. A groove is formed, and a metal dome is attached to the adhesive surface of the processing tape through an insertion hole of the spacer and the film separator.

According to a sixth aspect of the present invention, there is provided a key switch unit comprising: a film separator; a spacer adhered so that an adhesive surface is in close contact with a release surface of the film separator; It consists of a processing tape and a plurality of metal domes adhered so that the surfaces are in close contact with each other, a plurality of positioning holes are formed in the film separator, and the metal dome can be inserted into the spacer and the film separator. A communication groove connecting the plurality of insertion holes and the adjacent insertion holes is formed, and a plurality of LED illumination holes are formed in the processing tape, the spacer and the film separator at positions separated from the insertion holes and the communication grooves. Also, make sure that the metal dome is adhered to the adhesive surface of the processing tape through the insertion holes of the spacer and the film separator. It is an butterfly.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a switch sheet 11 for a key switch unit according to the present invention. The switch sheet 11 for a key switch unit has a film separator 12 and an adhesive surface on a release surface of the film separator 12. And a processing tape 14 adhered to the upper surface of the spacer 13 such that the adhesive surface is adhered to the spacer 13 in order. And
The film separator 12 and the spacer 13 include:
A plurality of insertion holes 12a, 13 through which the metal dome D can be inserted
a is formed, and the adjacent insertion holes 12a, 12a
a and a communication groove 1 communicating between the insertion holes 13a, 13a.
2b and 13b are formed.
2, a plurality of positioning holes 12c are formed.

As will be described later, the switch sheet 11 for the key switch unit is formed into a sheet or roll in a state where the release surface of the interlayer paper 16 is adhered to the back surface of the film separator 12 of the switch sheet 11 for the key switch unit. It is wound into a shape and delivered to the processing manufacturer. For this reason, the back surface (outer surface) side of the film separator 12 which is one outermost layer of the key switch unit switch sheet 11 is sealed by the interlayer paper 16.

As a result, in the switch sheet 11 for the key switch unit, the processing tape 14, the spacer 13 and the film separator 12 are laminated in order from the top, and the spacer 13 is sealed by the processing tape 14 as the outermost layer. Accordingly, it is possible to reliably prevent dust from entering from the outer surface side of the processing tape 14 and attaching to the adhesive surface on the back surface side.

In the above-described embodiment of the switch sheet 11 for a key switch unit, an example in which the processing tape 14 having no hole is stuck on the upper surface of the spacer 13 to seal the spacer 13 is illustrated. As shown in the figure, the LED separator holes 12d, 13d, and 14a are formed in the film separator 12, the spacer 13, and the processing tape 14.
May be formed. In this case, the insertion holes 12a,
The LED illumination holes 12d, 13d, and 14a may be formed at positions separated from the communication grooves 13a and the communication grooves 12b and 13b. Also in such an embodiment, the LED illumination hole 1
It is possible to reliably prevent dust from invading through 4a and adhering to the back side adhesive surface of the processing tape 14.

Next, an apparatus 20 for manufacturing a switch sheet 11 for a key switch unit, specifically, a switch sheet 11 for a key switch unit having a hole for LED illumination is formed.
Will be described with reference to FIG.

The manufacturing apparatus 20 includes a reel 21 for feeding a roll-shaped film separator 12, a reel 22 for feeding a spacer 13 in a roll shape, a reel 23 for feeding a processing tape 14 in a roll shape, and a roll-shaped application tape. Fifteen payout reels 24, spacers 13 and film separators 12 laminated in order from the top
And spacer 1 in application tape 15
3 and the insertion hole 13 described above in the film separator 12.
a, 12a and first grooves forming the communication grooves 13b, 12b.
At the same time as punching the processing tape 14, the spacer 13, the film separator 12, and the application tape 15, the processing tape 14 and the spacer 13 in the punch device 25 and the processing tape 14, the spacer 13, and the application tape 15 stacked in order from the top, the processing tape 14, the spacer 13 Positioning holes 14b, 13c, 12c and LE in film separator 12
A second punching device 26 that forms the D illumination holes 14a, 13d, and 12d, a winding device that winds up the processing tape 141 having a punched out set shape and a spacer 131 that has a punched out punched shape. 27, laminated processing tape 14 having a set shape, spacer 1 having a set shape
3. a feeding device 28 for sandwiching and pulling out the film separator 12 and the application tape 15; a winding device 29 for winding the application tape 15;
The laminated processing tape 14 having the set shape, the spacer 13 having the set shape, and the film separator 12, that is,
It comprises a winding device 30 for winding the switch sheet 11 for a key switch unit, and a reel 31 for feeding out an interlayer paper (release paper) 16 adhered so as to protect the back surface of the switch sheet 11 for a key switch unit. .

The application tape 15 is
The adhesive surface is attached to the reel 24 with the adhesive surface facing upward so that the adhesive surface adheres to the lower surface of the film separator 12, and the spacer 13 is attached to the release surface on the upper surface side of the film separator 12. The processing tape 14 is attached to the payout reel 22 so that the adhesive surface faces the lower surface, and the processing tape 14 has the adhesive surface facing the lower surface such that the adhesive surface is attached to the upper surface of the spacer 13. 2
3 is attached.

On the other hand, the first punching device 25 and the second punching device 26 are composed of working dies 251 and 261 respectively, and crank devices 252 and 262 for raising and lowering the working dies 251 and 261 respectively. Mold 25
1 and 261 and the height of the crank device 25
In the first punching device 25, the insertion holes 13a, 12a and the communication groove 1
3b and 12b are formed. In the second punching device 26, the processing tape 14 and the spacer 13 are punched into a set shape, and the processing tape 14 and the spacer 1 are punched.
3 and positioning hole 14 in film separator 12
b, 13c, 12c and LED illumination holes 14a, 13
d, 12d.

The processing tape 141 having the set shape punched out and the spacer 131 having the set shape punched out
Take-up device 27, stacked processing tape 14 having a set shape, spacer 13 having a set shape, film separator 12, and feed device 2 for application tape 15
8. The winding device 29 for the application tape 15 and the winding device 30 for the switch sheet 11 for the key switch unit each have a motor (not shown), and operate in synchronization with each other. That is, the punching devices 25 and 26 operate to operate the processing mold 25.
When the first and the second 261 descend, the winding devices 27, 29 and 3
0 and the feed device 28 are stopped. On the other hand, when the processing dies 251 and 261 are raised, the feeding device 28 is operated to draw out the stacked processing tape 14, the spacer 13, the film separator 12 and the application tape 15 by a set length. , 29,3
0 also operates to wind up the stamped peripheral processing tape 141 and the stamped peripheral spacer 131 by the same length, and the application tape 1
5 and the key switch unit switch sheet 11 are wound up by the same length.

Next, the manufacturing apparatus 20 configured as described above
The case where the switch sheet 11 for a key switch unit is manufactured by using the following will be described. First, each roll body of the film separator 12, the spacer 13, the processing tape 14 and the application tape 15 is fed out to reels 21, 22, 23, and 23, respectively. After being mounted in the directions respectively set to the 24, the respective tips are pulled out and positioned on the center line, and the deviation in the left-right direction with respect to the extension direction is regulated by a regulating roller (not shown). Then, the film separator 12 is placed on the adhesive surface of the application tape 15 and the two are adhered to each other, and further, the adhesive surface of the spacer 13 is placed and adhered on the release surface of the film separator 12. Through.

Next, the spacers 1 stacked sequentially from the top
3. Processing tape 1 on the upper surface of spacer 13 in film separator 12 and application tape 15
After the adhesive surface of No. 4 is put on and adhered, it is passed through the second punch device 26, guided to the feed device 28, and sandwiched. As described above, the processing tape 14, the spacer 13, the film separator 12, and the application tape 15 are sequentially adhered and integrated from the top, and then, by operating the feeder 28, the processing tape 14, the spacer 13, Film separator 12 and application tape 15
Are pulled out by the same length. Then, the processing tape 14, the spacer 13, and the film separator 1 stuck together.
After the application tape 15 and the application tape 15 are pulled out by the feeding device 28, the application tape 15 is separated from the film separator 12, and the leading end thereof is fixed to the winding device 29 and wound. On the other hand, the processing tape 14, the spacer 13 and the film separator 12 from which the application tape 15 has been separated are used as the switch sheet 11 for the key switch unit, on the back surface of the film separator 12, to release the interlayer paper 16 fed from the reel 31. The surfaces are brought into close contact with each other, and are integrally wound around the winding device 30.

Here, when the first punching device 25 is operated, the processing die 251 is moved up and down by the stroke through the crank device 252, and the spacer 1 integrally adhered thereto.
3. Insertion holes 13a, 12a and communication grooves 13b, 1 in the spacer 13 and the film separator 12 in the film separator 12 and the application tape 15.
2b are formed (see FIG. 4).

When the second punching device 26 is operated, the processing die 261 is moved up and down by the stroke through the crank device 262, and the processing tape 14, the spacer 13 and the film separator 12 adhered together. And processing tape 14 in application tape 15
And the spacer 13 are punched into a set shape, and positioning holes 14b, 13c, 12c and L are formed in the processing tape 14, the spacer 13 and the film separator 12.
ED illumination holes 14a, 13d, and 12d are formed, respectively (see FIG. 5).

On the other hand, when the punching operation by the second punching device 26 is completed, the processing tape 14, the spacer 13, the film separator 12
The application tape 15 is pulled out, and then the processing tape 14 and the spacer 13 are wound up by the winding device 27, so that the surrounding scrap portion 14 in which the set shape is punched out by the processing die 261.
1, 131 is peeled off from the film separator 12 and wound up. The stamped processing tape 14 having the set shape and the spacer 13 having the set shape are sequentially adhered to the spacer 13 and the film separator 12 via the adhesive surfaces thereof (see FIG. 6).

Further, the processing tape 14, the spacer 13, and the film separator 1 stacked via the feeding device 28
2 and after pulling out the application tape 15,
By winding the application tape 15 through the winding device 29, the application tape 15 is peeled off from the film separator 12 and wound.

At this time, the blanks punched out by the second punching device 26 and the cutting wastes corresponding to the insertion holes 13a, 12a and the communication grooves 13b, 12b of the spacer 13 and the film separator 12 punched by the first punching device 25. Holes 14b, 13c, 12c for positioning tape 14, spacer 13 and film separator 12
And the scraps respectively corresponding to the LED illumination holes 14a, 13d, and 12d are the processing tape 14, the spacer 1
3 and the film separator 12 are sequentially adhered to the respective adhesive surfaces and finally adhered to the adhesive surface of the application tape 15.
Is removed from the film separator 12, the first
Insertion holes 13a, 12 formed by punch device 25
a and the communication grooves 13b, 12b are opened, and the positioning holes 12 formed by the second punching device 26 are formed.
c and the LED illumination holes 14a, 13d, 12d are opened.

Next, the processing tape 14 having the LED illumination hole 14a formed therein, the insertion hole 13a, the communication groove 13b, the spacer 13 having the LED illumination hole 13d formed therein, and the insertion hole 12a are formed. Groove 12b,
The key switch unit switch sheet 11 composed of the film separator 12 in which the positioning holes 12c and the LED illumination holes 12d are formed is wound up through the winding device 30, whereby the roll-shaped key switch unit switch sheet 11 is formed. Manufactured.

At this time, the insertion holes 13a, 12a formed in the film separator 12 and the spacer 13, respectively.
In addition, an interlayer paper 16 is adhered to the back side of the film separator 12 and wound up integrally so that dust and the like do not adhere to the adhesive surface of the processing tape 14 exposed by the communication grooves 13b and 12b.

As a result, the processing tape 14 serving as the outermost layer
Accordingly, it is possible to automatically manufacture the switch sheet 11 for the key switch unit in which the spacer 13 is sealed and dust is reliably prevented from entering from the outer surface side of the processing tape 14.

It should be noted that, depending on the user's request, the processing tape 14 and the spacer 1 that have been punched by the punching devices 25 and 26 without attaching the interlayer paper 16 can be used.
3. In some cases, the film separator 12 and the application tape 15 are wound up while being integrally laminated, formed into a roll, and shipped to a processing maker. in this case,
By peeling off the application tape 15 at the processing maker, the switch sheet 11 for the key switch unit is obtained.

In the above-described embodiment, LE
The case where the key switch unit switch sheet 11 having the D illumination hole is manufactured has been described. However, in the case where the LED illumination hole is not formed, the hole may be formed by replacing the corresponding die 261 with the corresponding mold 261. The second punch device 26 in this case
Is performed by punching the processing tape 14 and the spacer 13 into a set shape, and
4. Positioning holes 14b, 13c and 12c are formed in the spacer 13 and the film separator 12.

Further, in the above-described manufacturing process, the first
A blank 13 corresponding to the insertion holes 13a, 12a and the communication grooves 13b, 12b of the spacer 13 and the film separator 12 punched by the punching device 25; a processing tape 14 punched by the second punching device 26;
Positioning holes 14b, 13c, 12c of spacer 13 and film separator 12, and LED illumination hole 14
Although the scraps respectively corresponding to a, 13d, and 12d are sequentially laminated and finally adhered to the application tape 15, and are removed when the application tape 15 is peeled off from the film separator 12, the application tape is always used. 15 is not always adhered. For example, processing tape 14, spacer 13,
Due to the strength of the adhesive force between the film separator 12 and the application tape 15 and the structure of the punching devices 25 and 26, the cutting waste corresponding to the insertion hole 13a and the communication groove 13b of the spacer 13 formed by the first punching device 25 is processed. The LED illumination hole 14 a of the processing tape 14 formed by the second punching device 26, which is attracted to the mold 251 and peeled off from the film separator 12.
Is used alone or the spacer 13
May be attracted to the processing mold 261 together with the scraps corresponding to the LED illumination holes 14a and peeled off from the spacer 13.

The processing tape 14, the spacer 13 and the film separator 1 are formed by the second punching device 26.
Although the manufacturing process of forming the positioning holes 14b, 13c, and 12c in FIG. 2 has been described, the positioning holes may be formed in the spacer 13 and the film separator 12 by the first punching device 25. In this case, it is also possible to perform processing such that the application tape 15 is penetrated and punched out so that the positioning hole formed by the second punch device 26 or the first punch 25 is also formed in the application tape 15 without being limited to the film separator 12. it can.

The switch sheet 11 for a key switch unit manufactured as described above is supplied to a processing maker, and after the interlayer paper 16 or the application tape 15 is removed, as shown in FIG.
2 and insertion holes 12a, 13 formed in spacer 13
a metal dome D is adhered to the back side adhesive surface of the processing tape 14 exposed through the key switch unit 10.
Is manufactured. Thereafter, if the roll-shaped key switch unit 10 is cut into a set length, individual key switch units 10 are obtained.

As a result, the key switch unit 10
The processing tape 14, the spacer 13, and the film separator 12 are laminated in this order from the top, and a metal dome D is attached to the exposed adhesive surface on the back surface of the processing tape 14. 13 is hermetically sealed, dust enters from the outer surface side of the processing tape 14 and the adhesive surface on the back side and the metal dome D
Can be reliably prevented from adhering to the contact portions. When one metal dome D is pressed, the air in the internal space of the metal dome D is dissipated by the communication grooves 13b, 13b formed in the spacer 13 and the film separator 12, respectively.
The other insertion holes 13a, 12 communicating with each other through 12b
a, the feel of the metal dome D when pressed is not impaired. That is, the insertion holes 1 formed in the spacer 13 and the film separator 12 respectively.
The space volume formed by the metal dome D is much smaller than the space volume formed by the metal dome 3a and 12a and the communication grooves 13b and 12b. You can do it.

As described above, when the key switch unit 10 is manufactured, the interlayer paper 16 or the application tape 15 is peeled off from the film separator 12, and the film separator 12 and the spacer are attached to the exposed adhesive surface of the processing tape 14. Insertion hole 1 formed in 13
Since the metal dome D is adhered through 2a and 13a, other adhesive surfaces of the processing tape 14, that is, adhesive surfaces at positions corresponding to the communication grooves 12b and 13b formed in the film separator 12 and the spacer 13 are exposed. Will remain. Therefore, there is no problem in the case where the key switch unit 10 is manufactured and used as it is by the processing maker to which the switch sheet 11 for the key switch unit is delivered, but in the case where the manufactured key switch unit 10 is supplied to another maker, FIG. As shown in FIG. 8, dust or the like is prevented from adhering to the adhesive surface of the processing tape 14 or the contact portion of the metal dome D where the positions corresponding to the communication grooves 12b, 13b formed in the film separator 12 and the spacer 13 are exposed. It is necessary to attach a protective film 17 from the back side of the film separator 12 to shield them.

[0043]

As described above, according to the switch sheet for a key switch unit of the present invention, dust enters and adheres to the adhesive surface of the processing tape for attaching the metal dome from the surface side of the processing tape. Can be reliably prevented.

Further, according to the method of manufacturing a switch sheet for a key switch unit of the present invention, dust enters and adheres to the adhesive surface of the processing tape for attaching the metal dome from the surface side of the processing tape. The switch sheet for the key switch unit, which can surely prevent such a situation, can be automatically manufactured without manual operation.

Furthermore, according to the key switch unit of the present invention, dust enters and adheres to the adhesive surface of the processing tape for attaching the metal dome and the contact portion of the metal dome from the surface side of the processing tape. This can be reliably prevented, and the feeling when pressing the metal dome is not impaired.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a switch sheet for a key switch unit of the present invention.

FIG. 2 is an exploded perspective view showing another embodiment of the switch sheet for a key switch unit of the present invention.

FIG. 3 is an explanatory view schematically showing an apparatus for manufacturing a switch sheet for a key switch unit in FIG. 2;

FIG. 4 is an exploded perspective view showing a processing result by a first punch device of the manufacturing apparatus of FIG. 3;

FIG. 5 is an exploded perspective view showing a processing result by a second punch device of the manufacturing apparatus of FIG. 3;

6 is a perspective view showing a key switch unit switch sheet pulled out by a feeder of the manufacturing apparatus of FIG. 3;

FIG. 7 is an exploded perspective view showing one embodiment of the key switch unit of the present invention.

FIG. 8 is an exploded perspective view showing another embodiment of the key switch unit of the present invention.

FIG. 9 is an exploded perspective view showing a conventional switch sheet for a key switch unit.

FIG. 10 is a cross-sectional view illustrating a key switch unit with a part thereof omitted;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Key switch unit 11 Key switch unit switch sheet 12 Film separator 13 Spacer 14 Processing tape 12a, 13a Insertion hole 12b, 13b Communication groove 12c Positioning hole 12d, 13d, 14a LED illumination hole 15 Application tape 16 Interlayer paper 17 Protective film 20 Manufacturing device 21, 22, 23, 24, 31 Feeding reel 25, 26 Punch device 27, 29, 30 Winding device 28 Feeding device D Metal dome

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G06F 3/02 310 H01H 27/00

Claims (7)

(57) [Claims] 1. A film separator, a spacer adhered so that an adhesive surface is in close contact with a release surface of the film separator, and a processing tape adhered such that the adhesive surface is in close contact with an upper surface of the spacer. A switch sheet for a key switch unit, wherein a plurality of insertion holes through which a metal dome can be inserted into at least a spacer and a film separator and a communication groove connecting adjacent insertion holes are formed. 2. A film separator, a spacer adhered so that an adhesive surface is in close contact with a release surface of the film separator, and a processing tape adhered so that the adhesive surface is in close contact with an upper surface of the spacer. A plurality of positioning holes are formed in the film separator, and a plurality of insertion holes through which a metal dome can be inserted into the spacer and the film separator and a communication groove connecting adjacent insertion holes are formed. A switch sheet for a key switch unit, wherein a plurality of LED illumination holes are formed at positions separated from the insertion hole and the communication groove in the processing tape, the spacer, and the film separator. 3. An application tape is adhered to a lower surface of a film separator having a release surface as an upper surface so that its adhesive surface is in close contact with the application tape, and a spacer is attached to the release surface of the film separator so that the adhesive surface is in close contact with the film separator. After sticking, at least a plurality of insertion holes through which the metal dome can be inserted into the spacer and the film separator and a communication groove connecting the adjacent insertion holes are formed, and then a processing tape is attached to the upper surface of the spacer with the adhesive surface thereof. After being adhered so as to adhere, at least the processing tape and the spacer are punched into a set shape, and these laminated processing tapes,
A method for manufacturing a switch sheet for a key switch unit, wherein a peripheral processing tape and a spacer punched out while taking out a spacer, a film separator and an application tape integrally are taken up and peeled off. 4. An application tape is adhered to a lower surface of a film separator having a release surface as an upper surface so that its adhesive surface is in close contact with the application tape, and a spacer is attached to a release surface of the film separator so that the adhesive surface is in close contact with the application tape. After sticking, the spacer and the film separator are formed with a plurality of insertion holes through which the metal dome can be inserted and a communication groove connecting the adjacent insertion holes, and then the processing tape is attached to the upper surface of the spacer with the adhesive surface. After sticking so that it adheres closely,
At the same time as forming a plurality of positioning holes in the processing tape, spacer, and film separator, punching the processing tape and spacer into a set shape, and further separating the processing tape, spacer, and film separator from through holes and communication grooves. A key for forming an LED illumination hole at a position, winding up the peripheral processing tape and spacer punched out while pulling out the processing tape, spacer, film separator and application tape integrally, and peeling the key. A method for manufacturing a switch sheet for a switch unit. 5. A film separator, a spacer adhered so that an adhesive surface is in close contact with a release surface of the film separator, and a processing tape adhered so that the adhesive surface is in close contact with an upper surface of the spacer. And a plurality of metal domes, and at least a plurality of insertion holes through which the metal dome can be inserted into the spacer and the film separator and a communication groove connecting adjacent insertion holes are formed, and through the insertion holes of the spacer and the film separator. A key switch unit wherein a metal dome is attached to an adhesive surface of a processing tape. 6. A film separator, a spacer adhered so that an adhesive surface is in close contact with a release surface of the film separator, and a processing tape adhered so that the adhesive surface is in close contact with an upper surface of the spacer. And a plurality of metal domes, a plurality of positioning holes are formed in the film separator, and the plurality of insertion holes through which the metal dome can be inserted into the spacer and the film separator and adjacent insertion holes are connected. A communication groove is formed, and further, a plurality of LED illumination holes are formed at positions separated from the insertion hole and the communication groove in the processing tape, the spacer, and the film separator. A key switch unit characterized in that a metal dome is adhered to an adhesive surface of a tape. 7. The method according to claim 1, wherein a protective film is adhered to a back surface of the film separator, and a metal dome adhered to the adhesive surface of the processing tape and the adhesive surface of the processing tape are shielded. 6. The key switch unit according to 6.