JP2012245692A - Insert molded article, electronic equipment, and insert molding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insert molded article which can suppress occurrence of a resin molding failure while suppressing deformation of an insert plate metal.SOLUTION: A front surface casing 10 (insert molded article) is provided with the insert plate metal 40 provided with a recessed part or a through hole 43 and a resin member 50 formed to surround the recessed part or the though hole 43 of the insert plate metal 40, and a hole part 13 reaching the inside of the recessed part or the through hole 43 of the insert plate metal 40 from the surface of the resin member 50 is formed.

Description

  The present invention relates to an insert molded product, an electronic device, and an insert molding method, and more particularly to an insert molded product, an electronic device, and an insert molding method including an insert sheet metal.

  Conventionally, an insert molded product including an insert sheet metal is known (see, for example, Patent Document 1).

  Patent Document 1 discloses an insert molded product in which a resin member is formed around an insert sheet metal by fixing the insert sheet metal in a resin injection space of a mold and injecting resin. In Patent Document 1, the resin flow path to the resin injection space of the mold is configured to be bent in a crank shape. As a result, the inflow speed of the resin flowing into the mold (resin injection space) is reduced at the crank-shaped portion, and the pressure of the resin on the insert sheet metal is reduced. In the said patent document 1, the deformation | transformation of the insert sheet metal by the pressure of the resin inject | poured is suppressed by reducing the injection pressure and injection speed of resin with respect to insert sheet metal.

JP 2004-106302 A

  However, in the insert molded product of Patent Document 1, it is possible to suppress the deformation of the insert sheet metal, while the injection pressure and the injection speed of the resin flowing into the mold (resin injection space) are reduced. There is a problem in that molding defects such as welds (grooves generated at the joining portion of the flowing resin) and sink marks (concave portions generated due to volume shrinkage when the resin is solidified) are likely to occur on the resin surface. In the case of an insert-molded product in which the appearance of a device casing or the like is important, a resin molding defect (appearance defect) due to such a weld or sink mark is particularly problematic.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to suppress the occurrence of resin molding defects while suppressing the deformation of the insert sheet metal. And an insert molding method, an electronic device, and an insert molding method.

Means for Solving the Problems and Effects of the Invention

  An insert molded product according to a first aspect of the present invention includes an insert sheet metal provided with a recess or a through hole, and a resin member formed so as to surround the recess or the through hole of the insert sheet metal, from the surface of the resin member. A hole reaching the inside of the recess or the through hole of the insert sheet metal is formed.

  In the insert molded product according to the first aspect of the present invention, as described above, the insert sheet metal provided with the recess or the through hole is provided, and the hole reaching the inside of the recess or the through hole of the insert sheet metal from the surface of the resin member By forming the portion, the resin is not filled in the concave portion or the through hole of the insert metal plate when resin molding is performed with a mold. That is, the resin is injected into the mold in a state where a part of the mold is inserted into the recess or the through hole of the insert metal plate. For this reason, resin can be injected in a state in which a part of the mold is fitted or engaged in the recess or through hole of the insert sheet metal, so that the force applied to the insert sheet metal (resin injection pressure) is supported by the mold. can do. This eliminates the need to reduce the injection pressure and injection speed in order to suppress the deformation of the insert sheet metal, and even when the optimum molding conditions (injection pressure and injection speed, etc.) are set to prevent resin molding defects. It is possible to effectively suppress the deformation of the sheet metal. From the above, according to the present invention, it is possible to suppress the occurrence of resin molding defects while suppressing the deformation of the insert sheet metal.

  In the insert molded product according to the first aspect, preferably, the recess or the through hole of the insert sheet metal is configured to be engageable with the mold at the time of insert molding. If comprised in this way, since the recessed part or through-hole of insert sheet metal can be easily engaged with a metal mold | die, a deformation | transformation of insert sheet metal can be suppressed effectively at the time of resin molding.

  In the insert molded product according to the first aspect, preferably, the insert sheet metal is provided with a through hole, and the insert sheet metal has a resin fixing hole in addition to the through hole, The resin member is filled so as to connect the one surface side and the other surface side of the insert sheet metal. If comprised in this way, since a resin member is connected via the resin fixing hole of insert sheet metal, an insert sheet metal and a resin member can be firmly fixed. Further, when the insert sheet metal is produced, the through hole and the resin fixing hole can be formed by the same process (hole forming process), and therefore, when the recess and the resin fixing hole are formed in the insert sheet metal in separate steps. Compared with, productivity can be improved.

  In this case, it is preferable that the insert metal plate has a plurality of resin fixing holes, and the through holes and the resin fixing holes are arranged at intervals. If comprised in this way, when producing insert sheet metal, by arranging a penetration hole and a resin fixing hole at intervals, it can control that intensity of insert sheet metal falls due to hole formation. it can.

  In the configuration in which the through hole is provided in the insert sheet metal, the resin member is preferably partially filled in the through hole so as to connect the one surface side and the other surface side of the insert sheet metal. If comprised in this way, the resin which firmly fixes an insert sheet metal and a resin member to the through-hole for suppressing a deformation | transformation of the insert sheet metal at the time of resin injection | pouring by partially filling the resin member in a through-hole. It can also serve as a fixing hole.

  In the insert molded article according to the first aspect described above, preferably, the insert molded article constitutes one casing, and the hole is formed on the inner surface side of the one casing, and on the outer surface of the one casing. Will not reach. If comprised in this way, even if it forms a hole part in order to suppress a deformation | transformation of the insert sheet metal at the time of resin injection | pouring, the external appearance of one housing | casing is not impaired by a hole part. That is, it is possible to suppress the deformation of the insert sheet metal and the occurrence of defective resin molding due to the reduction in the injection pressure and injection speed of the resin without impairing the appearance of the casing.

  In this case, preferably, the hole portion of the one housing is formed so as to be engageable with an engaging claw portion provided in the other housing. If comprised in this way, at the time of insert molding (at the time of resin injection | pouring), a deformation | transformation of insert sheet metal can be suppressed by a hole part, and the hole part of one housing | casing is also made into the other housing | casing after insert molding. It can be used as a hole for engagement with the engagement claw portion.

  In the insert molded article according to the first aspect, preferably, the inner surface of the recess or the through hole of the insert sheet metal includes a linear engagement portion, and the recess or the penetration in the linear engagement portion of the recess or the through hole. The inner surface of the hole is exposed through the hole. If comprised in this way, insert molding will be performed in the state which engaged the linear engaging part of the recessed part or the through-hole with the metal mold | die (contact). For this reason, since the insert sheet metal and the mold can be brought into line contact (or surface contact) at the linear engagement portion of the recess or the through hole, the force (resin injection pressure) applied to the insert sheet metal is applied to the mold. It can be supported stably.

  In this case, preferably, the recess or the through hole has a substantially rectangular shape. If comprised in this way, when producing insert sheet metal, it is sufficient to form a substantially rectangular recess or through-hole, which is a simple shape including a linear engagement portion, so that the mold and the wire can be easily formed. A contact or surface contactable recess or through-hole can be formed.

  In the insert molded article according to the first aspect, preferably, the insert sheet metal includes an upper surface portion or a bottom surface portion, and a side surface portion bent with respect to the upper surface portion or the bottom surface portion, and the resin member surrounds the side surface portion. The concave portion or the through hole is formed in the side surface portion. Here, when the insert sheet metal has a bent side surface (bent side surface), the resin injection pressure is likely to be greatly applied in the vicinity of the bent portion of the insert sheet metal during insert molding (resin injection). According to the present invention, the force (resin injection pressure) applied to the vicinity of the bent portion of the insert metal plate can be supported by the mold by the concave portion or the through hole formed in the side surface portion. As a result, the deformation of the insert sheet metal can be effectively suppressed particularly at the side surface where the deformation of the insert sheet metal is likely to occur structurally.

  An electronic apparatus according to a second aspect of the present invention includes a main body portion, one housing that accommodates the main body portion, and the other housing. The one housing includes an insert sheet metal provided with a recess or a through hole, and an insert. And a resin member formed so as to surround the concave portion or the through hole of the sheet metal. On the inner surface side of the housing, a hole portion reaching from the surface of the resin member to the concave portion or the through hole of the insert metal plate is formed. ing.

  In the electronic device according to the second aspect of the present invention, as described above, the insert sheet metal having a recess or a through hole provided in one casing is provided, and the insert sheet metal is provided on the inner surface side of the casing from the surface of the resin member. By forming a hole that reaches the inside of the recess or the through-hole, when performing resin molding with the mold, the mold is inserted with a part of the mold inserted into the recess or the through-hole of the insert metal plate. Resin is injected into the mold. For this reason, resin can be injected in a state in which a part of the mold is fitted or engaged in the recess or through hole of the insert sheet metal, so that the force applied to the insert sheet metal (resin injection pressure) is supported by the mold. can do. This eliminates the need to reduce the injection pressure and injection speed in order to suppress the deformation of the insert sheet metal, and even when the optimum molding conditions (injection pressure and injection speed, etc.) are set to prevent resin molding defects. It is possible to effectively suppress the deformation of the sheet metal. From the above, according to the present invention, it is possible to suppress the occurrence of resin molding defects while suppressing the deformation of the insert sheet metal. Furthermore, since the hole is formed on the inner surface side of the one casing, the outer appearance of the one casing of the electronic device whose appearance is particularly important is not damaged by the hole.

  In the electronic apparatus according to the second aspect, preferably, the other housing includes an engaging claw portion formed so as to be engageable with a hole portion of the one housing. If comprised in this way, the hole part of one housing | casing which can suppress a deformation | transformation of insert sheet metal at the time of insert molding (at the time of resin injection | pouring), and the engagement nail | claw part of the other housing | casing after insert molding It can be used as an engagement hole.

  An insert molding method according to a third aspect of the present invention includes a step of preparing an insert sheet metal provided with a recess or a through hole, and the insert sheet metal is molded in a state where the protrusion of the mold is engaged with the recess or the through hole. A step of setting the mold, a step of injecting resin into the mold in a state where the convex portion of the mold is engaged with the concave portion or the through hole, and a step of forming a resin member so as to surround the concave portion or the through hole of the insert metal plate; .

  In the insert molding method according to the third aspect of the present invention, as described above, the step of preparing the insert sheet metal provided with the recess or the through hole, and the state where the convex portion of the mold is engaged with the recess or the through hole In the step of setting the insert sheet metal in the mold, and injecting resin into the mold with the convex part of the mold engaged with the concave part or the through hole, the resin member so as to surround the concave part or the through hole of the insert sheet metal Since the resin can be injected in a state where the convex portion of the mold is engaged inside the concave portion or the through hole of the insert metal plate, the force applied to the insert metal plate (resin injection pressure) is Can be supported by mold. This eliminates the need to reduce the injection pressure and injection speed in order to suppress the deformation of the insert sheet metal, and even when the optimum molding conditions (injection pressure and injection speed, etc.) are set to prevent resin molding defects. It is possible to effectively suppress the deformation of the sheet metal. From the above, according to the present invention, it is possible to suppress the occurrence of resin molding defects while suppressing the deformation of the insert sheet metal.

1 is a perspective view illustrating an overall configuration of a digital photo frame according to an embodiment of the present invention. 1 is an exploded perspective view for explaining an internal structure of a digital photo frame system according to an embodiment of the present invention. It is an expanded sectional view showing a hole of a front case by one embodiment of the present invention. It is the fragmentary sectional view which showed the engagement state of the hole part of the front housing | casing by one Embodiment of this invention, and the engagement nail | claw part of a back housing | casing. It is the perspective view which showed typically the insert sheet metal of the front housing | casing by one Embodiment of this invention. It is an enlarged view of the side part for demonstrating the through-hole and resin fixing hole of the insert sheet metal of the front housing | casing by one Embodiment of this invention. It is the expanded sectional view which showed the resin fixing hole of the insert sheet metal of the front housing | casing by one Embodiment of this invention. It is the schematic diagram which showed the set state of the insert sheet metal for demonstrating the manufacturing method of the front housing | casing by one Embodiment of this invention. It is the schematic diagram which showed the filling state of resin for demonstrating the manufacturing method of the front housing | casing by one Embodiment of this invention. It is the schematic diagram which showed the open state of the metal mold | die for demonstrating the manufacturing method of the front housing | casing by one Embodiment of this invention. It is the schematic diagram which showed the extrusion operation | movement of the front housing | casing for demonstrating the manufacturing method of the front housing | casing by one Embodiment of this invention. It is the expanded sectional view which showed typically the front housing | casing by the modification of one Embodiment of this invention.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.

  First, the configuration of a digital photo frame 1 according to an embodiment of the present invention will be described with reference to FIGS. In the present embodiment, an example in which the present invention is applied to a digital photo frame 1 which is an example of an electronic apparatus will be described.

  As shown in FIGS. 1 and 2, the digital photo frame 1 includes a box-shaped housing 2 having a rectangular shape when viewed from the front. A main body 3 is housed inside the housing 2. The main body unit 3 includes a liquid crystal display unit 31 and a substrate 32.

  The housing 2 includes a front housing 10 and a back housing 20. The front casing 10 and the rear casing 20 can be engaged with each other by a hole 13 (see FIG. 3) provided in the front casing 10 and an engaging claw 23 provided in the rear casing 20 (see FIG. 3). 4). The front housing 10 and the back housing 20 are coupled by screwing (not shown) with the hole 13 and the engaging claw 23 engaged with each other. The hole 13 of the front housing 10 and the engaging claw 23 of the rear housing 20 are each provided at two locations on the long side 2a (see FIG. 1) side of the housing 2, and the short side 2b (see FIG. 1). One side is provided on each side, and a total of six locations are provided. The front casing 10 and the rear casing 20 are examples of the “one casing” and the “other casing” in the present invention, respectively.

  As shown in FIG. 2, the front housing 10 has a frame shape (frame shape) having an opening 10 a for a display screen (liquid crystal display unit 31) in the center, and the display surface side portion of the housing 2 is It is composed. The front housing 10 has a frame-shaped upper surface portion 11 on the display surface side (arrow Z1 direction side), and a side surface portion 12 extending from the upper surface portion 11 to the back surface side (rear housing 20 side, arrow Z2 direction side) (FIG. 3). Reference). The side surface portion 12 is formed in a circumferential shape along the outer peripheral edge portion of the upper surface portion 11. As shown in FIG. 3, the hole portion 13 that can be engaged with the engaging claw portion 23 of the rear housing 20 is formed on the inner surface side of the circumferential side surface portion 12. The front housing 10 is formed by insert molding in which a metal material and a resin material are integrally formed, and includes an insert sheet metal 40 and a resin member 50. The resin member 50 is formed so as to be thickened to a part of the insert metal plate 40 and constitutes the upper surface portion 11 and the side surface portion 12 of the front housing 10.

  As shown in FIG. 2, the insert sheet metal 40 is exposed on the inner side (center side) of the frame-shaped upper surface portion 11 as viewed in a plan view, and a frame is formed at the boundary with the upper surface portion 11 made of the resin member 50. A stepped portion 14 is formed. A rectangular protective plate 4 made of transparent glass or a resin material is fitted into and fixed to the frame-shaped step portion 14. The protection plate 4 is provided to protect the liquid crystal display unit 31.

  As shown in FIG. 5, the insert metal plate 40 is made of a metal plate having a thickness t (see FIG. 3), and is bent toward the back side (arrow Z2 direction) with respect to the frame-shaped flat upper surface portion 41 and the upper surface portion 41. The side portion 42 is integrally included. The side surface portion 42 is formed in a circumferential shape along the outer peripheral edge portion of the upper surface portion 41. The circumferential side surface portion 42 is provided with a through hole 43 and a resin fixing hole 44 along the circumferential direction (C direction). The through-hole 43 is formed at a position corresponding to the engagement claw portion 23 (see FIG. 2) of the rear housing 20. That is, the through-holes 43 are provided at two locations on the side surface portion 42 on the long side 40a side of the insert metal plate 40 and at one location on the side surface portion 42 on the short side 40b side, for a total of six locations. A plurality of resin fixing holes 44 are formed at substantially equal intervals over the entire circumference of the side surface portion 42. As shown in FIG. 6, the through holes 43 and the resin fixing holes 44 are formed so as to be spaced apart from each other and to be aligned in a line along the circumferential direction (C direction) of the side surface portion 42.

  The through hole 43 has a substantially rectangular shape when seen in a plan view. The through-hole 43 includes linear long side portions 43a and 43b having a length L1 and linear short side portions 43c and 43d having a length L2. The long side portions 43a and 43b are formed along the circumferential direction (C direction) of the side surface portion. As will be described later, the through hole 43 is configured to be engageable with the mold 100 (see FIG. 8) during insert molding. The long side portion 43a is an example of the “linear engagement portion” in the present invention.

  Further, the resin fixing hole 44 has a circular shape when seen in a plan view. The resin fixing hole 44 has a diameter d substantially equal to the length L2 of the short side portion 43c (43d) of the through hole 43. As shown in FIG. 7, the resin fixing hole 44 is filled with a resin member 50 so as to connect the inner surface 40 c side and the outer surface 40 d side of the insert metal plate 40. That is, the resin member 50 is formed in a state where the resin on the inner surface 40 c side and the resin on the outer surface 40 d side of the insert metal plate 40 are connected via each of the plurality of resin fixing holes 44.

  As shown in FIGS. 3 and 7, the resin member 50 includes the entire circumferential side surface portion 42 of the insert sheet metal 40 (the inner surface 40c side and the outer surface 40d side of the side surface portion 42, the lower end portion, the through hole 43, and the resin). It is formed so as to surround the fixed hole 44) and to cover a part of the frame-shaped upper surface portion 41. Thereby, the resin member 50 constitutes the side surface portion 12 and the upper surface portion 11 of the front housing 10. Further, on the upper surface portion 41 side of the insert metal plate 40, a step portion 14 is formed at the boundary between the resin member 50 and a non-formation region of the resin member 50 (a portion where the upper surface portion 41 is exposed).

  Here, as shown in FIG. 3, in the present embodiment, the hole 13 of the front housing 10 is located inside the through hole 43 of the insert metal plate 40 from the inner surface 50 a of the resin member 50 on the inner surface side of the side surface portion 12. Is formed to reach. The hole 13 is formed so as not to reach the outer surface of the front case 10 (side surface portion 12) (the outer surface 50b of the resin member 50). Specifically, the hole 13 passes from the inner surface 50a of the resin member 50 to the position slightly outside the outer surface 40d of the insert sheet metal 40 (through the outer surface 50b side of the resin member 50) through the penetrating school 43. It has a reachable depth Dp. The hole 13 has a width (width in the Z direction) W that is smaller than the length L2 of the short side portion 43c (43d) of the through hole 43. The hole 13 is formed in a shape corresponding to the engagement claw 23 of the rear housing 20 so that the engagement claw 23 (see FIG. 4) can be engaged with the hole 13.

  The hole portion 13 is formed such that the inner surface (long side portion 43a) of the through hole 43 of the insert sheet metal 40 is exposed inside the hole portion 13 (that is, the insert sheet metal 40 is partially exposed from the hole portion 13). ing. On the other hand, the hole 13 has a width W in the Z direction that decreases toward the bottom 13 a, and the long side 43 b of the through hole 43 is covered with the resin member 50. Thus, the hole 13 is formed so as to partially penetrate the through hole 43 of the insert metal plate 40 and reach the outer surface 40 d side of the insert metal plate 40. For this reason, the resin member 50 is partially filled in the inside of the through hole 43 (portion on the long side 43b side) so as to connect the inner surface 40c side and the outer surface 40d side of the insert metal plate 40. . Although not shown, the width in the circumferential direction (C direction) of the hole 13 is substantially equal to the length L1 (see FIG. 6) of the long side portion 43a (43b) of the through hole 43, or L1. Smaller than.

  As shown in FIG. 2, the back housing 20 has a flat bottom surface portion 21 on the back surface side and a circumferential shape extending from the outer peripheral edge portion of the bottom surface portion 21 to the display surface side (front housing 10 side, arrow Z1 direction). The side part 22 is included integrally. An engaging claw portion 23 that engages with the hole 13 of the front housing 10 is formed on the inner surface side of the circumferential side surface portion 22.

  The engaging claw portion 23 has a hook-like shape that protrudes from the side surface portion 22 toward the display surface (in the direction of the arrow Z1), and the tip portion protrudes outward. As shown in FIG. 4, the engaging claw 23 is formed so as to be able to engage with the hole 13 of the front housing 10 when the digital photo frame 1 is assembled.

  The liquid crystal display unit 31 of the main body 3 has a rectangular shape and has a display screen 31 a corresponding to the opening 10 a of the front housing 10. The substrate 32 is provided with a control circuit (not shown) such as a CPU and a flash memory, and an interface (not shown) for a storage medium such as a media card. The substrate 32 performs image data acquisition and display control of the liquid crystal display unit 31. The liquid crystal display unit 31 and the substrate 32 are formed slightly smaller than the casing 2 (the front casing 10 and the rear casing 20) and are accommodated inside the casing 2. In addition, illustration of the main-body part 3 is abbreviate | omitted in FIG.3, FIG4 and FIG.7.

  Next, with reference to FIG. 3, FIG. 5 and FIGS. 8-11, the manufacturing method of the front housing | casing 10 by one Embodiment of this invention is demonstrated.

  First, as shown in FIG. 5, an insert sheet metal 40 is prepared by press molding or the like. At this time, the through hole 43 and the resin fixing hole 44 are formed in the side surface portion 42 by punching or the like so as to be aligned in a line along the circumferential direction (C direction).

  Next, injection molding of the resin member 50 (see FIG. 3) is performed. First, as shown in FIG. 8, the insert sheet metal 40 is set in the mold 100.

  The mold 100 mainly includes a core part 101 and a cavity part 102. The core portion 101 includes ejector pins 111 and 112 for extruding a molded product (front housing 10) after injection molding, and inclined pins 113 for forming the hole portion 13. The inclined pin 113 is formed with an engaging convex portion 114 for being inserted into and engaged with the through hole 43 of the insert metal plate 40. The engagement convex portion 114 is an example of the “convex portion” in the present invention.

  In the insert metal plate 40, the engaging convex portions 114 of the inclined pins 113 are inserted into the through holes 43 at the six side surfaces 42 (two each on the long side 40 a side and one each on the short side 40 b side, see FIG. 5). The long side portion 43a and the engaging surface 114a of the engaging convex portion 114 are set in the core portion 101 in a state where they are engaged. Thereby, the insert metal plate 40 is supported by the mold 100 in a state where the inner surface (long side portion 43 a) of the through hole 43 is in surface contact with the engaging surface 114 a of the engaging convex portion 114.

  Next, as shown in FIGS. 8 and 9, in a state where the insert metal plate 40 is set in the core portion 101, the core portion 101 is moved to the cavity portion 102 side to close the mold 100. At this time, the insert metal plate 40 is sandwiched between the core portion 101 and the cavity portion 102 in a non-formation region of the resin member 50 (a portion where the upper surface portion 41 is exposed). For this reason, the insert sheet metal 40 has the upper surface portion 41 supported by the core portion 101 and the cavity portion 102, and the side surface portion 42 supported by the engagement convex portion 114 (the inclined pin 113) that engages with the through hole 43. The

  When the mold 100 is closed, the mold 100 is then filled with resin. As shown in FIG. 9, the resin is injected into the mold 100 through the gate 103 provided in the core portion 101. As shown in FIG. 7, the resin fixing hole 44 is filled with resin so as to connect the inner surface 40 c side and the outer surface 40 d side of the insert metal plate 40. In addition, the resin is filled in the through hole 43 between the engagement convex portion 114 and the long side portion 43b, so that the resin is inside the through hole 43 so as to connect the inner surface 40c side and the outer surface 40d side. Partially filled with. Note that the appearance of the casing 2 (front casing 10) is important in terms of quality. For this reason, the gate 103 is arranged so that the resin is injected from the inner surface 40c side of the insert metal plate 40 in order to keep the appearance of the front housing 10 good. Further, the gates 103 are arranged at a plurality of predetermined locations in the circumferential direction (C direction, see FIG. 5).

  When the injected resin is cooled and cured, the resin member 50 is integrally formed on the side surface portion 42 of the insert metal plate 40 and the peripheral edge portion of the upper surface portion 41. Further, the resin member 50 on the inner surface 40c side and the resin member 50 on the outer surface 40d side of the insert metal plate 40 are connected and firmly fixed via the through hole 43 and the resin fixing hole 44 (see FIG. 7). . Next, as shown in FIG. 10, the core portion 101 is moved away from the cavity portion 102 to open the mold 100.

  As shown in FIG. 11, the ejector pins 111 and 112 and the inclined pin 113 move relative to the core portion 101, respectively, and the molded product (front housing 10) is pushed out from the core portion 101. . At this time, the ejector pins 111 and 112 are linearly moved (relatively moved) toward the cavity portion 102, while the inclined pin 113 is inclined toward the cavity portion 102 while sliding toward the inside of the front housing 10 (left side in FIG. 11). Move relative to. Thereby, the engaging convex part 114 of the inclined pin 113 is pulled out from the through hole 43 of the insert metal plate 40. As a result, the engagement between the engagement convex portion 114 of the inclined pin 113 and the through hole 43 of the insert metal plate 40 is released. In the front housing 10, the portion from which the engagement convex portion 114 is pulled out remains as the hole portion 13.

  Thus, the manufacture of the front housing 10 by insert molding is completed.

  As shown in FIG. 2, the back housing 20 is set in the front housing 10 after the main body 3 (the liquid crystal display unit 31 and the substrate 32) is stored. The engaging claw 23 of the rear housing 20 is engaged with the hole 13 of the front housing 10 (see FIG. 4), and the front housing 10 and the rear housing 20 are coupled by screwing. Further, the protective plate 4 is fitted and fixed to the step portion 14 on the display surface side of the front housing 10, and the digital photo frame 1 is assembled.

  In the present embodiment, as described above, the front sheet 10 is provided with the insert sheet metal 40 provided with the through-holes 43, and the inner surface 50 a of the resin member 50 is inserted into the insert sheet metal 40 on the inner surface side of the front case 10. By forming the hole 13 reaching the inside of the through hole 43, when the resin molding is performed with the mold 100, the engagement convex portion 114 of the mold 100 is inserted into the through hole 43 of the insert sheet metal 40. In this state, the resin is injected into the mold 100. For this reason, since resin can be inject | poured in the state which engaged the engaging convex part 114 of the metal mold | die 100 in the through-hole 43 of the insert sheet metal 40, the force (resin injection pressure) added to the insert sheet metal 40 is metallized. It can be supported by the mold 100. Thereby, in order to suppress the deformation of the insert metal plate 40, it is not necessary to reduce the injection pressure and the injection speed of the resin, and the optimum molding conditions (such as the injection pressure and the injection speed) are set so that the resin molding defect is not likely to occur. However, it can suppress effectively that insert sheet metal 40 changes. From the above, in the front case 10 of the present embodiment, it is possible to suppress the occurrence of resin molding defects while suppressing the deformation of the insert sheet metal 40.

  More specifically, when resin molding is performed so as to cover the entire side surface portion 42 as in the case of the front housing 10, the side surface portion 42 is usually not supported inside the mold 100. The insert sheet metal 40 is easily deformed by pressure. On the other hand, if the injection pressure and injection speed of the resin are set low in order to prevent the deformation of the insert metal plate 40, welds (grooves generated at the joining portion of the flowing resin) and sink marks (recesses generated due to volume shrinkage during resin solidification) ) And other molding defects are likely to occur. On the other hand, in this embodiment, since the side surface part 42 of the insert sheet metal 40 is supported by the engaging convex part 114, it is possible to suppress the deformation of the insert sheet metal 40 without reducing the injection pressure and the injection speed. it can.

  In the present embodiment, as described above, the through-hole 43 of the insert metal plate 40 is configured to be engageable with the mold 100 (engagement convex portion 114) at the time of insert molding. Since the through-hole 43 can be easily engaged with the metal mold | die 100, a deformation | transformation of the insert sheet metal 40 can be suppressed effectively at the time of resin molding.

  In the present embodiment, as described above, the insert metal plate 40 is provided with the resin fixing hole 44 in addition to the through hole 43, and the inner surface 40 c side and the outer surface 40 d side of the insert metal plate 40 inside the resin fixing hole 44. Since the resin member 50 is connected via the resin fixing hole 44 of the insert metal plate 40 by filling the resin member 50 so as to connect the two, the insert metal plate 40 and the resin member 50 can be firmly fixed. it can. Moreover, since the through-hole 43 and the resin fixing hole 44 can be formed by the same process (hole formation process) when producing the insert sheet metal 40, the recess and the resin fixing hole 44 are separately formed in the insert sheet metal 40. Productivity can be improved as compared with the case of forming in a process.

  In the present embodiment, as described above, the through hole 43 and the resin fixing hole 44 of the insert metal plate 40 are formed so as to be arranged at intervals along the circumferential direction (C direction) of the side surface portion 42. Thus, when the insert sheet metal 40 is manufactured, the through holes 43 and the resin fixing holes 44 are arranged with a space therebetween, so that it is possible to suppress the strength of the insert sheet metal 40 from being reduced due to the hole formation.

  In the present embodiment, as described above, the resin member 50 is partially filled in the through hole 43 so as to connect the inner surface 40c side and the outer surface 40d side of the insert metal plate 40. The through-hole 43 for suppressing the deformation of the insert metal plate 40 at the time of resin injection can also function as the resin fixing hole 44 for firmly fixing the insert metal plate 40 and the resin member 50.

  In the present embodiment, as described above, the hole 13 of the front casing 10 that is an insert-molded product is formed on the inner surface side (the inner surface 50a of the resin member 50) of the front casing 10, and the front casing 10 Even if the hole 13 is formed in order to suppress deformation of the insert metal plate 40 at the time of resin injection by forming it so as not to reach the outer surface of the body 10 (outer surface 50b of the resin member 50), the hole 13 does not impair the appearance of the front housing 10. That is, it is possible to suppress the deformation of the insert metal plate 40 and the occurrence of resin molding defects due to the reduction in the injection pressure and injection speed of the resin without deteriorating the appearance of the front housing 10.

  Further, in the present embodiment, as described above, the hole 13 of the front housing 10 is formed so as to be engageable with the engaging claw 23 provided in the rear housing 20, so that at the time of insert molding (resin At the time of injection), the deformation of the insert metal plate 40 can be suppressed by the hole 13, and the hole 13 of the front housing 10 is connected to the engaging claw 23 of the rear housing 20 even after insert molding. It can be used as an engagement hole.

  Further, in the present embodiment, as described above, in the linear long side portion 43a of the through hole 43 of the insert metal plate 40, the inner surface of the through hole 43 is exposed through the hole portion 13, thereby, Insert molding is performed in a state where the linear long side portion 43 a of the through hole 43 is engaged (contacted) with the mold 100. For this reason, the linear long side portion 43a of the through hole 43 can bring the inner surface (long side portion 43a) of the insert metal plate 40 and the mold 100 (the engaging surface 114a of the engaging convex portion 114) into surface contact. Therefore, the force (resin injection pressure) applied to the insert metal plate 40 can be stably supported by the mold 100.

  Further, in the present embodiment, as described above, by forming the through-hole 43 having a substantially rectangular shape, when the insert sheet metal 40 is produced, it is a simple shape including the straight long side portion 43a. Since the rectangular through-hole 43 may be formed, the through-hole 43 that can be in line contact or surface contact with the mold 100 can be easily formed.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the above embodiment, an example in which the present invention is applied to a digital photo frame is shown, but the present invention is not limited to this. The present invention may be applied to electronic devices other than digital photo frames. For example, the present invention may be applied to an electronic device such as a mobile phone or a television device.

  Moreover, in the said embodiment, although the example which applied this invention to the housing | casing (front housing | casing) of a digital photo frame was shown as an example of the insert molded product of this invention, this invention is not limited to this. The present invention may be applied to an insert molded product other than a housing as long as it is an insert molded product including an insert sheet metal and a resin member.

  Moreover, in the said embodiment, although the example which formed the through-hole engageable with a metal mold | die was shown in insert sheet metal, this invention is not limited to this. In the present invention, as shown in the modification of FIG. 12, a recess 243 may be formed in the insert sheet metal instead of the through hole. A recess 243 that can be engaged with the engaging protrusion 114 (see FIG. 8) of the mold 100 is formed in the insert metal plate 240 of the front case 210 according to the modification of FIG. The front housing 210 is formed with a hole 213 that reaches the inside of the recess 243 of the insert metal plate 240 from the inner surface of the resin member 250. Even in such a configuration, by engaging the concave portion 243 and the mold 100 (engagement convex portion 114), resin molding failure occurs while suppressing deformation of the insert metal plate 240 at the time of forming the insert. Can be suppressed.

  Moreover, in the said embodiment, although the example which provided the through-hole which can be engaged with a metal mold | die and the resin fixing hole filled with resin was shown in the insert sheet metal, this invention is not limited to this. In the present invention, only the through hole may be provided in the insert metal plate. In particular, when the through hole is partially filled with resin as in the above embodiment, the through hole can also function as a resin fixing hole, so only the through hole is provided. Even in this case, it is possible to sufficiently fix the insert sheet metal and the resin member.

  Moreover, in the said embodiment, although the example which fills the resin member partially in the through-hole of insert sheet metal was shown, this invention is not limited to this. In the present invention, the through hole may not be filled with the resin member.

  Further, in the above embodiment, the example in which the through hole and the resin fixing hole of the insert metal plate are formed so as to be arranged at intervals along the circumferential direction (C direction) is shown, but the present invention is not limited thereto. Absent. In the present invention, the through hole and the resin fixing hole may not be arranged side by side.

  Moreover, in the said embodiment, while the through-hole was formed in the substantially rectangular shape and the resin fixing hole was formed in the circular shape, the present invention is not limited to this. The shape of the through hole and the resin fixing hole may be any shape.

  In the above embodiment, the hole is formed on the inner surface side of the front casing, and the hole is formed so as not to reach the outer surface of the front casing. Not limited. In the present invention, the hole may be formed so as to penetrate from the inner surface to the outer surface of the insert molded product. In particular, when the present invention is applied to an insert molded product whose appearance is not important, there is no problem even if the hole is formed on the outer surface.

  Moreover, although the example which provided the linear part (long side part) in the through-hole of insert sheet metal was shown in the said embodiment, this invention is not limited to this. In the present invention, it is not necessary to provide a linear portion in the through hole.

  Moreover, although the example which formed the through-hole in the side part of insert sheet metal was shown in the said embodiment, this invention is not limited to this. In the present invention, the through hole may be formed at any position on the insert sheet metal.

  Moreover, although the example which formed the hole part of the front housing | casing so that engagement with the engaging claw part of a back housing | casing was shown in the said embodiment, this invention is not limited to this. In this invention, you may form so that the hole part of one housing | casing may not engage with the engaging claw part of the other housing | casing.

1 Digital photo frame (electronic equipment)
2 Housing 3 Main body 10, 210 Front housing (one housing)
13, 213 Hole 20 Rear housing (other housing)
23 engaging claw part 40,240 insert sheet metal 41 upper surface part 42 side part 43 through-hole 43a long side part (linear engagement part)
44 Resin fixing hole 50, 250 Resin member 100 Mold 114 Engaging convex portion
243 recess

Claims (13)

An insert sheet metal provided with a recess or a through hole;
A resin member formed so as to surround the recess or the through hole of the insert sheet metal,
An insert molded product in which a hole reaching the inside of the recess or the through hole of the insert sheet metal from the surface of the resin member is formed.   The insert molded product according to claim 1, wherein the recess or the through hole of the insert sheet metal is configured to be engageable with a mold during insert molding. The insert sheet metal is provided with the through hole,
The insert sheet metal has a resin fixing hole in addition to the through hole,
The insert molded product according to claim 1 or 2, wherein the resin member is filled in the resin fixing hole so as to connect the one surface side and the other surface side of the insert sheet metal.   4. The insert molded product according to claim 3, wherein the insert sheet metal has a plurality of the resin fixing holes, and is formed so that the through holes and the resin fixing holes are arranged at intervals.   The insert molding according to claim 3 or 4, wherein the resin member is partially filled in the through hole so as to connect the one surface side and the other surface side of the insert sheet metal. Goods. The insert molded product constitutes one housing,
6. The insert-molded product according to claim 1, wherein the hole is formed on an inner surface side of the one casing and does not reach an outer surface of the one casing.   The insert molded product according to claim 6, wherein the hole portion of the one housing is formed to be engageable with an engaging claw portion provided in the other housing. The inner surface of the recess or the through hole of the insert sheet metal includes a linear engagement portion,
The insert molded product according to any one of claims 1 to 7, wherein an inner surface of the recess or the through hole is exposed through the hole in the linear engagement portion of the recess or the through hole. .   The insert-molded product according to claim 8, wherein the recess or the through hole has a substantially rectangular shape. The insert sheet metal includes an upper surface portion or a bottom surface portion, and a side surface portion bent with respect to the upper surface portion or the bottom surface portion,
The resin member is formed so as to surround the side surface portion,
The insert molded product according to any one of claims 1 to 9, wherein the concave portion or the through hole is formed in the side surface portion. A main body, and one housing and the other housing for housing the main body,
The one casing is
An insert sheet metal provided with a recess or a through hole;
A resin member formed so as to surround the recess or the through hole of the insert metal plate,
An electronic device in which a hole reaching the inside of the recess or the through hole of the insert sheet metal from the surface of the resin member is formed on the inner surface side of the one housing.   The electronic device according to claim 11, wherein the other housing includes an engaging claw portion formed to be engageable with the hole portion of the one housing. Preparing an insert sheet metal provided with a recess or a through hole;
A step of setting the insert sheet metal in the mold in a state where a convex part of the mold is engaged with the concave part or the through hole;
Injecting resin into the mold in a state where the convex part of the mold is engaged with the concave part or the through hole, and forming a resin member so as to surround the concave part or the through hole of the insert sheet metal, An insert molding method.

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