KR100990803B1 - Intermediate for touch panel, touch panel, mold for inmold and method of manufacturing intermediate for touch panel - Google Patents

Abstract

The intermediate part for the touch panel which can solve the problem caused by the formation of the gate mark in the touch surface of the panel part, and provides the intermediate part for the panel part 21 in the base part 1 which has the plate-shaped panel part 21. The transparent conductive film 3 is attached to the inner surface 21a by in-mold molding, and the bonding area E1 to which the transparent conductive film 3 is attached is defined on the inner surface 21a, and is attached to the inner surface 21a. The site | part located in the width | variety E1 of the adhesion area E1 along the longitudinal direction of the end surface 21c rather than the inner surface 21a in the end surface 21c of the adjacent panel part 21 along the longitudinal direction of the end surface 21c. 21 d of gate marks at the time of in-mold molding are formed in the inside.

Description

Intermediates for Touch Panels, Touch Panels, Molds for In-Mold and Intermediates for Touch Panels {INTERMEDIATE FOR TOUCH PANEL, TOUCH PANEL, MOLD FOR INMOLD AND METHOD OF MANUFACTURING INTERMEDIATE FOR TOUCH PANEL}

The present invention provides a touch panel intermediate having a base portion having a panel portion and a transparent conductive film pasted on the panel portion, a touch panel provided with the touch panel intermediate, an in-mold mold configured to be able to manufacture the touch panel intermediate, and A touch panel intermediate manufacturing method for manufacturing the touch panel intermediate.

As the in-mold die of this kind, an in-mold die disclosed in Japanese Patent Laid-Open No. 2004-152221 is known. This in-mold metal mold | die is comprised with the movable metal mold | die and the stationary metal mold | die, and it is comprised so that a touch panel board | substrate can be shape | molded by injecting a resin material from a gate with respect to the cavity formed in the joining state of both metal mold | die. Moreover, in this in-mold metal mold | die, as shown in FIG. 1 of the same publication, the transfer film (film for in-molding) in which the gate is provided in the cavity surface which forms one surface of a touchscreen board | substrate, and the transparent conductive film was formed is carried out. In the state inserted into the cavity, the resin material is injected from this gate, so that the transparent conductive film is transferred to the other surface of the touch panel substrate.

<Patent Document 1> Japanese Unexamined Patent Publication No. 2004-152221 (Page 3-4, Fig. 1)

However, the above in-mold mold has the following problems. That is, in this in-mold metal mold | die, the transparent conductive film is transferred to the other surface of a touch panel substrate by injection of the resin material from the gate provided in the cavity surface which forms one surface of a touch panel substrate. For this reason, in the touch panel substrate shape | molded by the said in-mold metal mold | die, the gate trace which arises when injecting a resin material from a gate is formed in the surface (one surface mentioned above). In this case, the surface of the touch panel substrate becomes a touch surface (contact surface) at the time of performing a touch operation. Therefore, the touch panel substrate formed by this in-mold die has a problem that the fingertip touches the gate marks formed on the touch surface during touch operation, thereby giving a user a sense of discomfort. In addition, since the gate marks are formed on the touch surface, there is also a problem that it becomes difficult to visualize the operation images and the like disposed inside the touch panel by the gate marks in a state where the touch panel is attached to the attachment object. In addition, as a result of gate marks being formed on the touch surface of the touch panel substrate formed by the in-mold mold, and the thickness of the touch panel substrate becomes uneven, for example, in a capacitive touch panel, malfunction occurs during touch operation. There is also a problem that there is a possibility of occurrence.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a touch panel intermediate, a touch panel, an in-mold mold and a touch panel intermediate manufacturing method which can solve the problems caused by the formation of gate marks on the touch surface of the panel unit. The main purpose is to provide.

MEANS TO SOLVE THE PROBLEM In order to achieve the said objective, the intermediate for touch panels which concerns on this invention is an intermediate | middle for touch panels formed by attaching a transparent conductive film by in-molding to one surface of the said panel part in the base part which has a plate-shaped panel part, The said one surface The bonding area | region to which the said transparent conductive film is affixed is prescribed | regulated, and the width | variety of the said bonding area | region along the longitudinal direction of the said cross section rather than the said one surface in the cross section of the said panel part adjacent to the said one side, and along the longitudinal direction of the said cross section. The gate mark at the time of the said in-molding is formed in the site | part located inside.

In this case, the panel portion may be formed in a curved shape.

Moreover, the touch panel which concerns on this invention is equipped with the terminal for connection for attaching the said intermediate body for touch panels, and the said intermediate bodies for touch panels, and connecting the said transparent conductive film and an external circuit with each other.

Moreover, the in-mold metal mold which concerns on this invention is comprised so that the in-mold film in which the transparent conductive film was formed can be bonded together, and forms the cavity which can form the gas part of the intermediate part for touch panels which has a plate-shaped panel part in the bonding state. And a first mold and a second mold, wherein the gas part is formed by injection of resin from the gate to the cavity, and the transparent conductive film is pasted on one side of the panel part to produce the touch panel intermediate. An in-mold mold, wherein the gate is located on the other side of the panel portion rather than a portion where the film for in-mold in the cavity surface on which the cross section of the panel portion adjacent to the one surface of the cavity surface constituting the cavity is formed. The cavity surface side for forming the surface and the cavity surface for forming the cross section According to the direction the art is provided on the area which is located within the width of the mold deuyong film.

In this case, the mold surface which forms the site | part which the said transparent conductive film adheres on the said one surface, and the metal mold surface which comprises the said in-mold metal mold | die are adjacent, and the edge part adjacent to the said metal mold surface in the said cavity surface is said mold surface. It can be configured as either a flat or curved surface that is gently inclined with respect to.

Moreover, the intermediate part for touch panels which concerns on this invention is an intermediate for touch panels which injects resin from the gate with respect to the cavity of the in-mold metal mold which sandwiched the in-mold film in which the transparent conductive film was formed, and has a plate-shaped panel part. A method of manufacturing an intermediate for a touch panel which forms the base of the panel and attaches the transparent conductive film to one side of the panel to manufacture the intermediate for the touch panel, wherein the adjacent surface of the cavity constituting the cavity is adjacent to the one side. The cavity surface for forming the other surface of the panel portion rather than the portion where the film for in-mold is located on the cavity surface for forming the cross section of the panel portion, and the film for in-molding along the longitudinal direction of the cavity surface for forming the cross section. Injection of the resin from the gate provided at a portion located within the width And the forming base portion.

In the intermediate for touch panels according to the present invention, a gate mark is formed in a cross section adjacent to one surface of the panel portion to which the transparent conductive film is attached, and the formation portion thereof is the other side of the panel portion and the length of the cross section. It is defined as a site located within the width of the bonding region along the direction. For this reason, both sides (one side and the other side) of a panel part can be formed in a smooth state without a gate mark, in the state which stuck the transparent conductive film to one side reliably, As a result, It is possible to reliably avoid the situation where the fingertip touches the gate mark during the touch operation, causing discomfort to the user. Moreover, according to this touch panel intermediate body, since both surfaces are smooth, the image etc. which are displayed inside the touch panel intermediate body which were attached to the attachment object can be visually recognized clearly enough, for example, this touch panel In the case of using the intermediate for a capacitive touch panel, it is possible to reliably avoid a situation in which a malfunction occurs due to uneven thickness of the panel portion.

In addition, according to the intermediate for touch panels according to the present invention, by forming the panel portion in a curved shape, for example, by defining the curvature of the panel portion to be the same as the curvature of the attaching object, the surface of the panel portion and the surface of the attaching object Since it becomes one side, the design of the attachment object can be improved. In this case, since the transparent conductive film is pasted to the curved panel portion by in-mold molding, unlike the configuration in which the transparent conductive film is formed on the curved surface by vapor deposition or sputtering, the thickness of the transparent conductive film can be made uniform. . Therefore, according to this touch panel intermediate body, it can reliably prevent generation | occurrence | production of the malfunction resulting from the nonuniform thickness of a transparent conductive film.

Moreover, according to the touch panel which concerns on this invention, by providing said intermediate for touch panels, the effect similar to the effect which said touch panel intermediate has can be realized.

Moreover, in the in-mold metal mold | die and the touchscreen intermediate manufacturing method which concern on this invention, the film for in-mold in the cavity surface which forms the cross section of the panel part adjacent to one surface to which the transparent conductive film is affixed among the cavity surfaces which comprise a cavity is located. The gate is provided at a part located in the width of the cavity surface along the longitudinal direction of the cavity surface for forming the cross section, and the resin is injected from the gate to form the gas part by forming the other surface of the panel portion rather than the portion to be formed. Mold. For this reason, the transparent conductive film can be reliably attached to one side of the panel portion by the pressure of the resin at the time of injection, and gate marks are formed on the end face of the panel portion, and both sides (one side and the other side) of the panel portion are gated. As a result of being able to form in a smooth state without marks, it is possible to produce an intermediate for touch panels that can reliably avoid the problems caused by the formation of gate marks on both surfaces (or one surface) of the panel portion.

Moreover, according to the in-mold metal mold | die which concerns on this invention, the cavity surface which shape | molds the site | part to which the transparent conductive film in one side of a panel part sticks, and the metal mold surface which comprises the in-mold metal mold | die are adjacent, and the mold surface in the cavity surface is adjacent. By forming an adjacent end portion with either a flat surface or a curved surface which is gently inclined with respect to the mold surface, it is possible to reliably prevent the occurrence of wrinkles in the in-mold film sandwiched by the in-mold mold.

EMBODIMENT OF THE INVENTION Hereinafter, the best form of the manufacturing method of the intermediate for touch panels, the touch panel, the in-mold metal mold | die, and the intermediate parts for touch panels is demonstrated with reference to an accompanying drawing.

First, the structure of the touch panel 1 is demonstrated with reference to drawings.

The touch panel 1 shown in FIG. 1 is a capacitive touch panel used, for example, in a touch type operation unit in an electric device or the like. As shown in this figure, the main body unit 1a and the connection unit are used. It is comprised including the terminal 1b. The main body portion 1a corresponds to the touch panel intermediate according to the present invention, is provided with a base portion 2 and a transparent conductive film 3, and has an in-mold mold 102 (hereinafter, simply referred to as “ It is manufactured by in-mold molding using the metal mold 102 ".

As shown in FIG. 1, the base part 2 is comprised from the plate-shaped panel part 21 and the attachment part 22 used at the time of attachment to the attachment object, such as an electrical apparatus, and is equipped with the metal mold | die 102 Is molded by injecting a resin (for example, an acrylic resin) having transparency into the cavity 102a (see FIG. 7). In this case, the panel part 21 is formed in the shape which curves with the same curvature as curvature, such as the main body of an attachment object (for example, cross-sectional shape is circular arc shape). In addition, as shown in FIG. 2, in the panel portion 21, one side of the adhesive region E1 to which the transparent conductive film 3 is pasted (which will be described later) is adjacent to the prescribed inner surface 21a. In the end face 21c, the gate trace 21d which arises when resin is injected from the gate 102c (refer FIG. 7) with respect to the cavity 102a of the metal mold 102 is formed. Specifically, as shown in FIG. 2, the gate trace 21d is the outer surface 21b (corresponding to one surface in the present invention) on the end face 21c (in the present invention). A portion (which corresponds to the other surface in the side) and located within the width W1 of the bonding region E1 along the longitudinal direction (left and right direction in this drawing) of the cross section 21c (width W1 as an example). Central part of the body). The outer surface 21b of the panel portion 21 is subjected to a hard coating process for preventing damage and an antireflection process for preventing reflection.

The transparent conductive film 3 is a thin film having transparency and conductivity, which is formed of the in-mold film 131 (see FIGS. 8 and 9), and the inner surface 21a of the panel portion 21 during in-mold molding. Is attached to a predetermined bonding region E1 (see Figs. 1 and 2). In this case, the bonding region E1 is actually a region in which the in-mold film 131 adheres to the inner surface 21a of the panel portion 21 at the time of in-mold molding, and the width W1 thereof is the panel portion 21. Slightly narrower than the width (length in the left and right direction in FIG. 2), and the other end (in this figure, from one end in the longitudinal direction of the panel portion 21 (the end of the upper left side in FIG. 1)). It is prescribed | regulated to the strip | belt-shaped area | region over the lower right side edge part. In addition, in this touch panel 1, as shown in FIG. 1, the transparent conductive film 3 of substantially rectangular shape (button type) is stuck to the site | part corresponding to the predetermined touch position at the time of touch operation, and Moreover, the linear transparent conductive film 3 for electrically connecting each substantially rectangular transparent conductive film 3 and the connection terminal 1b is attached.

As shown in FIG. 1, the connection terminal 1b is attached to the end surface 21e opposite to the end surface 21c of the panel part 21 of the main body part 1a, for example, and is also a panel part. It is connected to the above-mentioned linear transparent conductive film 3 formed in the inner surface 21a of (21). Moreover, the connection terminal 1b is comprised so that the connector of a connection cable can be inserted and connects the external circuit, such as a control part of an attachment object, and the transparent conductive film 3 via a connection cable.

The touch panel 1 is attached to the main body of the attachment object such that the outer surface 21b of the panel portion 21 faces the outside of the attachment object, that is, the outer surface 21b is the touch surface. In this case, as described above, the panel portion 21 of the touch panel 1 is formed in a plate shape that is curved at the same curvature as the curvature of the main body. For this reason, in the attachment state, since the outer surface 21b of the panel part 21 and the surface of a main body exist in the same surface, it becomes possible to improve the design of an attachment object. Here, when the transparent conductive film 3 is formed in the curved surface by the vapor deposition method or the sputtering method, there is a fear that the thickness of the transparent conductive film 3 becomes uneven. On the other hand, in this touch panel 1, since the transparent conductive film 3 is pasted by in-molding, the thickness of the transparent conductive film 3 becomes a uniform state. Moreover, in this touch panel 1, as mentioned above, 21 d of gate marks which arise at the time of shaping | molding are formed in the end surface 21c of the panel part 21. As shown in FIG. For this reason, the inner surface 21a and the outer surface 21b of the panel part 21 are formed in the smooth state without the unevenness resulting from formation of a gate mark.

Next, the structure of the manufacturing apparatus 101 is demonstrated with reference to drawings.

The manufacturing apparatus 101 is comprised including the metal mold | die 102, the in-mold film moving apparatus 103, and the injection molding machine 104, as shown in FIG. The metal mold | die 102 is a metal mold | die which can manufacture the main-body part 1a of the touch panel 1 by in-molding according to the manufacturing method of the intermediate for touch panels which concerns on this invention, and it puts on the 1st metal mold in this invention. The fixed side metal mold | die (upper metal mold | die) 111 and the moving side metal mold | die (lower metal mold | die) 121 corresponded to the 2nd metal mold in this invention are comprised. Moreover, the metal mold | die 102 has the main-body part 113 of the fixed side metal mold 111 in the state which inserted the in-mold film 131 moved by the in-mold film moving apparatus 103 (refer FIG. 7). The main body 123 of the moving side mold 121 is configured to be joinable.

As shown in FIG. 4, the stationary mold 111 is provided with a base portion 112 and a main body portion 113. The base part 112 is formed in plate shape, and is comprised so that attachment to the fixed side attachment part (not shown) of the injection molding machine 104 is possible. The main body 113 is fixed to the base 112 and, as shown in FIG. 7, is bonded to the main body 123 of the moving side mold 121 with the in-mold film 131 inserted therein. In the cavity, a cavity 102a for forming the main body portion 1a is formed together with the main body portion 123.

In this case, as shown in FIGS. 6 and 7, the inner surface 21a of the panel portion 21 in the main body portion 1a of the cavity surfaces forming the cavity 102a (the above-described bonding region E1). Injection injected through a sprue 102b to a cavity surface (cavity surface 102d in FIGS. 6 and 7) for forming an end face 21c (see FIGS. 1 and 2) adjacent to each other). The gate 102c for injecting the resin in the flow state from the molding machine 104 into the cavity 102a is provided. Specifically, the gate 102c is formed of the panel portion 21 rather than the portion where the in-mold film 131 sandwiched by the main body 113 and the main body 123 on the cavity surface 102d is positioned. Of the in-mold film 131 along the cavity surface (cavity surface 102e in both figures) forming the outer surface 21b and along the longitudinal direction (vertical direction in FIG. 4) of the cavity surface 102d. It is formed in the site | part (a center part in width W2 as an example) located in width W2 (that is, same width | variety: width W1 of the above-mentioned adhesion | attachment area | region E1: see FIG. 8 and FIG. 8). For this reason, as shown in FIG. 7, the cavity surface 102f which the in-mold film 131 opposes the cavity surface 102e by the pressure of the resin injected from the gate 102c into the cavity 102a ( It is pressed toward the cavity surface which forms the inner surface 21a of the panel part 21.

As shown in FIG. 5, the moving side mold 121 includes a base 122, a main body 123, a spacer block 124, and an eject plate 125. The base part 122 is formed in plate shape, and is comprised so that attachment to the moving side attachment part (not shown) in the injection molding machine 104 is possible. The main body 123 is fixed to the base 122 through the spacer block 124, and forms a cavity 102a together with the main body 113 of the fixed side mold 111. In this case, as shown in FIG. 6, the main body portion 123 is a portion to which the transparent conductive film 3 is attached on the inner surface 21a of the panel portion 21 (that is, the above-described adhesive region E1). (In other words, the in-mold film 131 is pressed at the time of in-mold molding)) (the up-down direction in Fig. 6) of the cavity surface 102f and adjacent to both ends thereof. There is no tuck between the mold surface (e.g., parting surface) 123a, and both surfaces are continuously connected, and both ends of the cavity surface 102f are connected to the mold surface 123a. It consists of either a plane which slopes gently with respect to the surface and a curve which slopes gently with respect to the surface (in this example, a curved surface). In addition, although the structure which has some tuck exists between the both ends of the cavity surface 102f and the mold surface 123a may be employ | adopted, in that structure, the height of a tuck is made to wrinkle in the in-mold film 131. It is preferable to set it so that it does not generate | occur | produce, ie, it does not interfere with in-molding. The eject plate 125 is provided between the base part 122 and the main body part 123, and is moved between the base part 122 and the main body part 123 by the injection molding machine 104, and thus it is out of the drawing. The eject pin protrudes forward of the main body 123.

As shown in FIG. 3, the in-mold film moving device 103 has a predetermined length (for each in-mold molding (one shot)) between the fixed-side mold 111 and the moving-side mold 121. For example, the in-mold film 131 is moved by the length L shown in FIGS. 8 and 9. Here, as shown in Fig. 9, the in-mold film 131 is formed by the base film 132 made of resin and the substantially rectangular shape described above by indium oxide such as indium oxide (ITO) doped with tin. It consists of the transparent conductive film 3 formed in the surface of the base film 132 in the state patterned in the shape and linear form, and the adhesion layer 134 formed in the surface of the transparent conductive film 3. Further, the material constituting the transparent conductive film 3 is not limited to the indium oxide described above, and fine particles of tin oxide such as tin oxide (ATO) doped with antimony and tin oxide (FTO) doped with fluorine, Zinc oxide fine particles such as aluminum oxide doped zinc oxide (AZO), and various materials having transparency and conductivity such as cadmium oxide can be used.

The injection molding machine 104 is, for example, a horizontal injection molding machine, and includes a fixed side attaching portion, a moving side attaching portion, a mold clamping mechanism, an injection mechanism, an ejection mechanism (not shown), and the like. Consists of. In addition, a vertical injection molding machine may be used as the injection molding machine 104. In this case, the fixed side mold 111 (and the fixed side mold 311 described later) is moved, and the moving side mold 121 is moved. (And the moving side die | dye 321 mentioned later) are fixed.

Next, with reference to the drawing about the process of manufacturing the main-body part 1a and the touch panel 1 in accordance with the manufacturing method of the intermediate body for touch panels which concerns on this invention using the manufacturing apparatus 101 (mold 102). Explain.

First, as shown in FIG. 3, the stationary side mold 111 and the movable side mold 121 of the metal mold 102 are attached to the stationary side attachment portion and the movable side attachment portion in the injection molding machine 104, respectively. do. Subsequently, the adhesive layer 134 is made to face the cavity surface 102e of the fixed side mold 111, and the in-mold film 131 is set in the in-mold film transfer device 103, and the in-mold film transfer device Activate (103). At this time, the in-mold film moving device 103 moves the in-mold film 131 by a predetermined length between the stationary side die 111 and the moving side die 121 of the die 102. The injection molding machine 104 is then operated. At this time, the mold clamping mechanism of the injection molding machine 104 moves the moving side attaching portion toward the fixed side attaching portion, so that the fixed side mold 111 and the moving side mold 121 are in-mold films as shown in FIG. They are joined together with the 131 inserted. In this case, in this mold 102, both surfaces are formed without a chin between the both ends of the cavity surface 102f in the main body 123 of the moving side mold 121 and the mold surfaces 123a adjacent to both ends thereof. It is connected continuously and the both ends of the cavity surface 102f are comprised by the curved surface which inclines gently with respect to the metal mold | die surface 123a. For this reason, as shown in FIG. 7, the situation where wrinkles generate | occur | produce in the embedded in-molding film 131 is reliably prevented.

Next, the injection mechanism of the injection molding machine 104 presses the resin in the fluid state. At this time, the resin pressurized from the injection molding machine 104 passes through the sprue 102b and is injected into the cavity 102a from the gate 102c. In this case, as shown in FIG. 7, in the mold 102, the cavity surface 102e is closer to the cavity surface 102e than the portion where the in-mold film 131 is located on the cavity surface 102d. The gate 102c is provided in the site | part located in the width W2 of the in-mold film 131 along the longitudinal direction of the. For this reason, the resin inject | poured into the cavity 102a from the gate 102c is filled in the cavity 102a, pressing the in-mold film 131 to the cavity surface 102f side. The adhesive layer 134 of the in-mold film 131 sandwiched between the resin and the cavity surface 102f is in close contact with the resin filled in the cavity 102a by the pressure of the resin.

Subsequently, after the predetermined cooling time has elapsed, the fixed side mold 111 and the movable side mold are moved by moving the moving side attachment portion in a direction in which the mold clamping mechanism of the injection molding machine 104 separates from the fixed side attachment portion. The bonding of the 121 is released, and the moving side mold 121 is separated from the fixed side mold 111. At this time, the molded article (that is, the body part 2 constituting the main body part 1a) formed by solidifying the resin is separated from the fixed side mold 111 together with the moving side mold 121. Subsequently, the ejection mechanism of the injection molding machine 104 moves the eject plate 125 of the moving side mold 121 to the main body 123 side, whereby the eject pins other than the drawings protrude in front of the main body 123, and the molding The gas part 2 thus obtained is taken out from the moving side mold 121. In this case, since the adhesion layer 134 is in close contact with the base part 2, the in-mold film 131 is taken out of the moving side mold 121 together with the base part 2.

Next, the base film 132 of the in-mold film 131 is peeled off from the base part 2. In this case, since the transparent conductive film 3 is in the state which adhered to the inner surface 21a of the panel part 21 in the base part 2 by the adhesion layer 134, the base film 132 makes a transparent conductive film. It peels easily from (3), and the transparent conductive film 3 is stuck to the inner surface 21a. Thereby, manufacture of the main-body part 1a comprised from the base part 2 and the transparent conductive film 3 adhering to the inner surface 21a of the panel part 21 in the base part 2 is completed. Next, the outer surface 21b of the panel portion 21 is subjected to hard coating processing and antireflection processing. Subsequently, the terminal 1b for connection is attached to the end face 21e of the panel portion 21 in the body portion 2 of the main body portion 1a, and is attached to the inner surface 21a of the panel portion 21. The linear transparent conductive film 3 and the connection terminal 1b are connected. Thus, the touch panel 1 is completed.

In this case, in this metal mold | die 102, as mentioned above, the gate 102c is formed in the cavity surface 102d which forms the end surface 21c of the panel part 21 in the main-body part 1a. For this reason, in the main-body part 1a manufactured by in-mold molding using this metal mold | die 102, and the touch panel 1 using the main-body part 1a, the gate trace 21d which arises when resin is injected is It is formed in the end surface 21c of the panel part 21, and the inner surface 21a and the outer surface 21b of the panel part 21 are formed in the smooth state without a gate mark. Therefore, the problem caused by the formation of the gate mark on the outer surface 21b is avoided. Moreover, in this touch panel 1, since the transparent conductive film 3 is stuck to the curved panel part 21 by in-molding, the thickness of the transparent conductive film 3 is uniform. For this reason, in this touch panel 1, it becomes possible to reliably prevent generation | occurrence | production of the malfunction resulting from the nonuniform thickness of the transparent conductive film 3.

Thus, in this touch panel 1 and the main-body part 1a for the touch panel 1, the end surface 21c adjacent to the inner surface 21a of the panel part 21 to which the transparent conductive film 3 is affixed is mentioned. 21 d of gate marks are formed in the width | variety and the formation site | part is the width | variety (1) of the adhesive area E1 along the longitudinal direction of the end surface 21c, and the outer surface 21b side rather than the inner surface 21a in the panel part 21 ( It is defined as the site located in W1). For this reason, in the state which stuck the transparent conductive film 3 to the inner surface 21a reliably, the inner surface 21a and the outer surface 21b of the panel part 21 can be formed in the smooth state without a gate mark, It is possible to reliably avoid the situation in which the fingertip touches the gate marks during the touch operation on the outer surface 21b to give a discomfort to the user. In addition, according to the touch panel 1 and the main body portion 1a for the touch panel 1, since the inner surface 21a and the outer surface 21b are smooth, the touch panel 1 is attached to the inside of the touch panel 1 attached to the attachment object. The displayed image and the like can be visually recognized clearly enough, and a situation in which a malfunction occurs due to uneven thickness of the panel portion 21 can be reliably avoided.

Moreover, according to this touch panel 1 and the main-body part 1a for the touch panels 1, the panel part 21 is formed in the curved board shape, for example, the curvature of the panel part 21 is made, for example. By defining the curvature equal to the curvature of the main body of the attachment object, the outer surface 21b of the panel portion 21 and the surface of the main body are on the same surface, it is possible to improve the design of the attachment object. In this case, since the transparent conductive film 3 is attached to the curved panel portion 21 by in-mold molding, unlike the configuration in which the transparent conductive film 3 is formed on the curved surface by vapor deposition or sputtering, it is transparent. The thickness of the conductive film 3 can be made uniform. Therefore, according to this touch panel 1 and the main-body part 1a for the touch panels 1, generation | occurrence | production of the malfunction by the nonuniform thickness of the transparent conductive film 3 can be prevented reliably.

Moreover, in this die 102 and the intermediate body manufacturing method for touch panels, the in-mold film in the cavity surface 102d which forms the end surface 21c of the panel part 21 among the cavity surfaces which comprise the cavity 102a ( Within the width W2 of the in-mold film 131 along the longitudinal direction of the cavity surface 102d, which is the side of the cavity surface 102e which forms the outer surface 21b of the panel portion 21 rather than the portion where the 131 is located. The gate 102c is provided in the site | part located, resin is inject | emitted from the gate 102c, and the base part 2 is shape | molded. For this reason, the transparent conductive film 3 can be reliably attached to the inner surface 21a of the panel part 21 by the pressure of resin at the time of injection, and the gate trace 21d is attached to the end surface of the panel part 21. As a result, the inner surface 21a and the outer surface 21b of the panel portion 21 can be formed in a smooth state without gate marks, and as a result, the gate marks 21d are formed in the panel portion 21. The main body part 1a for the touch panel 1 which can reliably avoid the problem resulting from this can be manufactured.

In addition, according to the mold 102 and the intermediate body manufacturing method for the touch panel, a portion (that is, the bonding region E1) to which the transparent conductive film 3 is pasted on the inner surface 21a of the panel portion 21 is formed. Both sides of the cavity surface 102f are continuously connected to both sides of the mold surface 123a without a jaw between the ends of the mold surface 123a adjacent to both ends thereof, and both ends of the cavity surface 102f are smooth with respect to the mold surface 123a. By constructing a curved surface that is inclined, it is possible to reliably prevent the occurrence of wrinkles in the embedded in-mold film 131.

Next, another example of the method for manufacturing the touch panel intermediate, the touch panel, the in-mold molding die and the touch panel intermediate according to the present invention will be described. In addition, in the following description, about the component same as the said touch panel 1 and the manufacturing apparatus 101, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

The touch panel 201 shown in FIG. 10 is a capacitive touch panel. As shown in this figure, the touch panel 201 is provided in the main body 201a, the connection terminal 201b, and the main body 201a. The protection film 201c formed in the outer surface 221b side of the panel part 221 is comprised. The main body portion 201a corresponds to the touch panel intermediate according to the present invention, has a base portion 202 and a transparent conductive film 203, and is described later as an in-mold mold 302 (hereinafter, simply referred to as “mold” (302) ") is formed by in-mold molding.

As shown in FIG. 10, the base part 202 is comprised from the curved panel-shaped panel part 221 and the attachment part 222, and is provided in the cavity 302a (refer FIG. 15) of the metal mold 302. As shown in FIG. It is shape | molded by injecting resin which has transparency. In addition, as shown in FIG. 11, one end surface 221c adjacent to the outer surface 221b of the panel portion 221 to which the bonding region E2 to which the transparent conductive film 203 described later is attached is defined. The gate trace 221d at the time of injecting resin from the gate 302c (see FIG. 15) to the cavity 302a of the mold 302 is formed. Specifically, as shown in FIG. 11, the gate trace 221d is an inner surface 221a (corresponding to one surface in the present invention) in the end face 221c (corresponding to one surface in the present invention). A portion (which corresponds to the other side) and positioned within the width W3 of the bonding region E2 along the longitudinal direction (left and right direction in this drawing) of the cross section 221c (for example, the width W3). In the center).

The transparent conductive film 203 is a thin film having transparency and conductivity, which is formed on the in-mold film 331 (see FIG. 16), and is formed on the outer surface 221b of the panel portion 221 during in-mold molding. It is attached to the bonding region E2 which is almost defined throughout (see Figs. 10 and 11).

The connection terminal 201b is, for example, attached to the end surfaces 221c and 221e of the panel portion 221, and attached to the outer surface 221b of the panel portion 221. It is connected to the corner. In addition, the connecting terminal 201b is configured to be able to insert a connector of a connecting cable, and connects a transparent conductive film 203 with an external circuit such as a control unit of an attachment object through the connecting cable.

The touch panel 201 is attached to the main body of the attachment object with the outer surface 221b of the panel 221 facing outward, that is, the outer surface 221b being the touch surface. In the touch panel 201, as described above, the gate trace 221d generated during molding is formed in the end face 221c of the panel portion 221. For this reason, the inner surface 221a and the outer surface 221b of the panel part 221 are formed in the smooth state without the unevenness | corrugation resulting from which a gate mark is formed.

On the other hand, the metal mold | die 302 shown in FIG. 14 is a metal mold | die which can manufacture the main-body part 201a of the touch panel 201 by in-molding according to the touch panel intermediate manufacturing method which concerns on this invention, and is fixed side metal mold | die. 311 and the moving side metal mold | die 321 are comprised. Moreover, as shown in FIG. 15, the main body part of the fixed side metal mold 311 in the state which inserted the in-mold film 331 moved by the in-mold film moving apparatus 103 is shown. 313 and the main body part 323 of the moving side metal mold 321 are comprised so that joining is possible.

As shown in FIG. 12, the stationary mold 311 includes a base 312 and a main body 313. As shown in FIG. 15, the main body 313 forms the main body 201a in a state in which the in-mold film 331 is sandwiched and bonded to the main body 323 of the moving mold 321. The cavity 302a is formed together with the main body portion 323.

In this case, as shown in FIG. 15, in each cavity surface which forms the cavity 302a, it is made to the outer surface 221b (mentioned adhesion area | region E2) of the panel part 221 in the main-body part 201a. In the flow state from the injection molding machine 104 which is pressurized through the sprue 302b to the cavity surface (cavity surface 302d in FIG. 15) which forms the adjacent end surface 221c (refer FIG. 10). The gate 302c for injecting the resin into the cavity 302a is provided. Specifically, as shown in this figure, the gate 302c forms the inner surface 221a of the panel portion 221 rather than the portion where the in-mold film 331 is located on the cavity surface 302d. The width W4 of the in-mold film 331 along the cavity surface 302e side and along the longitudinal direction (vertical direction in FIG. 12) of the cavity surface 302d (that is, the width of the above-described adhesion region E2). The same width as W3: It is formed in the site | part located in this figure (for example, center part in width W4). For this reason, as shown in FIG. 15, the cavity surface 302f (outer surface of the panel part 221) which opposes the cavity surface 302e by the pressure of resin injected into the cavity 302a from the gate 302c. The in-mold film 331 is pressed to the side of the cavity surface for forming 221b.

As shown in FIG. 13, the moving side metal mold | die 321 is the base part 322 comprised so that attachment to the moving side attachment part of the injection molding machine 104, and the base part 322 via the spacer block 324 is possible. And a eject plate 325 for projecting the eject pin outside the drawing to the front of the main body 323. In this case, the main body 323 forms a cavity 302a together with the main body 313 of the fixed side mold 311. In addition, as shown in FIG. 14, the main body portion 323 is a portion to which the transparent conductive film 203 is pasted on the outer surface 221b of the panel portion 221 (that is, the adhesive region E2 described above) ( 11) both ends (the upper and lower ends in FIG. 14) of the cavity surface 302f (in other words, the in-mold film 331 is pressed during in-mold molding) and molds adjacent to both ends thereof. Both surfaces are continuously connected without a chin between the surfaces (e.g., parting surfaces) 323a, and both flat and gentle slopes of both ends of the cavity surface 302f are gently inclined with respect to the mold surface 323a. It consists of one of curved surfaces (in this example, a curved surface).

In addition, in manufacture of this touch panel 201, the in-mold film 331 shown in FIG. 16 is used instead of the in-mold film 131 mentioned above. As shown in this figure, this in-mold film 331 is made of a base film 332 made of a resin base film 332 and a material having the same transparency and conductivity as the transparent conductive film 3 described above. The transparent conductive film 203 formed on the surface of the transparent conductive film 203 and the adhesive layer 334 formed on the surface of the transparent conductive film 203 are comprised. In this case, in this in-mold film 331, the transparent conductive film 203 is formed over the entire surface of the surface of the base film 332 (not patterned).

When manufacturing the touch panel 201 according to the method for manufacturing the touch panel intermediate according to the present invention using the mold 302 described above, the fixed mold 311 and the moving mold 321 are placed on the injection molding machine 104. Attach each. Subsequently, the in-mold film 331 is set in the in-mold film transfer device 103 so that the adhesive layer 334 faces the cavity surface 302e side of the fixed side mold 311, and the in-mold film transfer device ( 103 and the injection molding machine 104 are operated.

Next, the injection mechanism of the injection molding machine 104 presses the resin in a fluid state. At this time, the resin pressurized from the injection molding machine 104 passes through the sprue 302b and is injected from the gate 302c into the cavity 302a. In this case, as shown in FIG. 15, in the mold 102, the cavity surface 302e is closer to the cavity surface 302e than the portion where the in-mold film 331 is located on the cavity surface 302d. The gate 302c is provided in the site | part located in the width W4 of the in-mold film 331 along a longitudinal direction. For this reason, resin injected from the gate 302c into the cavity 302a is filled in the cavity 302a while pressing the in-mold film 331 to the cavity surface 302f. In addition, the adhesive layer 334 of the in-mold film 331 sandwiched between the resin and the cavity surface 302f adheres to the resin filled in the cavity 302a by the pressure of the resin.

Subsequently, after a predetermined cooling time has elapsed, the moving side attachment portion is moved in a direction in which the mold clamping mechanism of the injection molding machine 104 is separated from the fixed side attachment portion, and the ejection mechanism of the injection molding machine 104 is then moved to the moving side mold. By moving the eject plate 325 of 321 to the main body 323 side, the molded article (namely, the gas unit 202 constituting the main body 201a) formed by solidifying the resin is the in-mold film 331. Withdrawal from the moving side mold 321 together.

Subsequently, the base film 332 of the in-mold film 331 is peeled off from the base portion 202, thereby making it transparent to the outer surface 221b of the panel portion 221 in the base portion 202 by the adhesive layer 334. The conductive film 3 is pasted. Thereby, manufacture of the main-body part 201a comprised from the base part 202 and the transparent conductive film 203 pasted to the outer surface 221b of the panel part 221 by the base part 202 is completed. Next, the protective film 201c is formed on the transparent conductive film 203 attached to the outer surface 221b. Subsequently, as shown in FIG. 10, the connection terminal 201b is attached to the end faces 221c and 221e of the panel part 221 in the body part 202, and the outer surface of the panel part 221 ( Four corners of the transparent conductive film 203 attached to the 221b and the connection terminal 201b are connected. Thereby, the touch panel 201 is completed. In this case, in this touch panel 201, the gate trace 221d is formed in the end surface 221c of the panel portion 221, and the inner surface 221a and the outer surface 221b of the panel portion 221 It is formed in a smooth state. For this reason, the image etc. which are displayed inside the touch panel 201 attached to the attachment object can be visually recognized clearly enough. Moreover, in this touch panel 201, since the inner surface 221a and outer surface 221b of the inner surface 221a are smooth states, the situation which malfunctions arises reliably because the thickness of the panel part 221 becomes uneven. It becomes possible to avoid it.

Thus, also in this touch panel 201, the main-body part 201a for the touch panel 201, the metal mold | die 302, and the intermediate body for touch panels, the transparent conductive film 203 is made to the outer surface 221b. In the securely attached state, the gate trace 221d is formed in the end surface 221c of the panel portion 221, and the inner surface 221a and the outer surface 221b of the panel portion 221 are formed in a smooth state without the gate trace. Therefore, the problem caused by the formation of the gate trace 221d in the panel portion 221 can be reliably avoided.

In addition, this invention is not limited to said structure. For example, although the curved panel parts 21 and 221 were demonstrated as an example, it is not limited to this, Arbitrary plate-shaped panel parts can be employ | adopted. In addition, although the metal mold | die 102, 302 which provided the gate 102c, 302c in one place of cavity surface 102d, 302d was demonstrated as an example, the gate 102c, 302c provided in cavity surface 102d, 302d is shown. The number of can be arbitrarily defined. In this case, the cavity surfaces on which the gates 102c and 302c are provided are not limited to the cavity surfaces 102d and 302d. For example, the gates 102c and 302c may be provided in the cavity surfaces for forming the other end surfaces 21e and 221e in the panel portions 21 and 221, and the cavity surfaces and the cavity surfaces 102d and 302d may be provided. It can also be installed on both sides.

1 is a perspective view illustrating a configuration of the touch panel 1.

FIG. 2 is a side view of the touch panel 1 seen in the direction of an arrow A in FIG. 1.

3 is a configuration diagram showing the configuration of the manufacturing apparatus 101.

4 is a perspective view of the stationary mold 111.

5 is a perspective view of the moving side mold 121.

6 is a cross-sectional view of the mold 102.

7 is a cross-sectional view of a state in which the stationary side die 111 and the moving side die 121 are joined.

FIG. 8: is a block diagram which shows the structure of the in-mold film 131. FIG.

9 is a cross-sectional view taken along the line B-B in FIG. 8.

10 is a perspective view illustrating a configuration of the touch panel 201.

FIG. 11 is a side view of the touch panel 1 seen in the direction of an arrow C in FIG. 1.

12 is a perspective view of the fixed side mold 311.

13 is a perspective view of the moving side mold 321.

14 is a cross-sectional view of the mold 302.

15 is a cross-sectional view of a state in which the stationary side mold 311 and the moving side mold 321 are joined.

16 is a cross-sectional view illustrating a configuration of the in-mold film 331.

<Code description>

1, 201: touch panel 1a, 201a: main body

1b and 201b: terminals 2 and 202 for connection

3,203: transparent conductive film 21,221: panel part

21a, 221a: inner surface 21b, 221b: outer surface

21c, 221c: Cross section 21d, 221d: Gate Mark

102, 302: mold 102a, 302a: cavity

102c, 302c: Gate

102d to 102f, 302d to 302f: cavity surface

111, 311: fixed side mold 121, 321: movable side mold

123a, 323a: mold surface 131, 331: film for in-mold

E1, E2: Bonding areas W1, W2, W3, W4: Width

Claims (6)

As an intermediate for touch panels formed by attaching a transparent conductive film by in-mold molding to one surface of the panel portion in a substrate having a plate-shaped panel portion, The panel portion is formed in a plate shape of uniform thickness and curvature, In the said one surface, the adhesion area | region to which the said transparent conductive film is stuck is prescribed | regulated, The gate mark at the time of the in-molding molding is located at the other surface side of the panel portion and located within the width of the bonding region in the longitudinal direction of the cross section than the one surface in the cross section of the panel portion adjacent to the one surface. Intermediates for touch panels formed. delete A touch panel provided with the intermediate | middle for touch panels of Claim 1, and the terminal for connection attached to the said intermediate | middle for touch panels, and connecting the said transparent conductive film and an external circuit with each other. And a first mold and a second mold, each of which is formed so that a cavity capable of forming a gas part of an intermediate part for a touch panel having a plate-shaped panel portion in a bonded state is formed by sandwiching an in-mold film having a transparent conductive film formed thereon. An in-mold mold configured to form the gas part by injection of resin from a gate to a cavity and to attach the transparent conductive film to one surface of the panel part so as to manufacture the touch panel intermediate. The said gate is the cavity surface side which shape | molds the other surface of the said panel part rather than the site | part where the said film for in-mold in the said cavity surface which forms the cross section of the said panel part adjacent to the said one surface among the cavity surfaces which comprise the said cavity is located. It is provided in the site | part located in the width | variety of the said in-mold film along the longitudinal direction of the cavity surface which shape | molds the said cross section, The cavity surface which forms the site | part which the said transparent conductive film adheres on the said one surface, and the parting surface of the said in-mold metal mold | die are adjacent, An in-mold mold, wherein an end portion of the cavity surface adjacent to the parting surface is composed of one of a plane that is gently inclined with respect to the parting surface and a surface that is gently inclined. delete The resin is injected from the gate to the cavity of the in-mold mold in which the in-mold film with a transparent conductive film is formed, and the gas part of the touch panel intermediate having the plate-shaped panel part is molded, and the transparent part is formed on one side of the panel part. As an intermediate manufacturing method for touch panels which pastes an electrically conductive film and manufactures the said intermediate bodies for touch panels, The cavity surface side which molds the other surface of the said panel part rather than the site | part where the said film for in-mold in the said cavity surface which forms the cross section of the said panel part adjacent to the said one surface among the cavity surfaces which comprise the said cavity is said cross section The cavity surface and the parting surface which form the part to which the said transparent conductive film in the said one side adheres, while the said gate is provided in the site | part located in the width | variety of the said in-mold film along the longitudinal direction of the cavity surface which shape | forms The resin is ejected from the gate of the in-mold mold, which is formed of one of a plane in which an end portion of the cavity surface adjacent to the parting surface is gently inclined with respect to the parting surface and a gently inclined curved surface. The intermediate panel manufacturing method for a touch panel for molding the base portion.

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