JP2009090475A - Method for producing box body and mold - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a box body which can make the box body compact and thin while integrating two kinds of members firmly. <P>SOLUTION: In the method for producing the box body 100 having a first member 5 formed from a first material having a first melting point and a second member 6 formed from a second material having a second melting point lower than the first melting point, a burying spot Z wherein the end part 5a of the first member 5 is bent, and the end part 5a is buried in the second member 6 and a joining spot Y wherein the first member 5 and the second member 6 are joined by one surface to each other are formed consecutively, the bending direction of the end part 5a of the first member 5 is made the joining direction to the second member 6 in the joining spot Y of the first member 5, and the bending start position 5c of the end part 5a of the first member 5 is formed at the boundary position W between the burying spot Z and the joining spot Y. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method and a mold for manufacturing a housing having a part manufactured so that two types of members having different melting points are integrally formed, and in particular, while firmly integrating two types of members. The present invention relates to downsizing and thinning of a housing.

  When a conventional case manufacturing method and a mold are used to form a case in which two types of members are integrated, for example, a metal plate and a resin layer are integrally formed so as to cover the surface of the metal plate mold. It was comprised with the resin molding of the structure made. According to the conventional resin molded body, the metal plate has a through hole, and has a protruding portion integrally connected by the through hole on the opposite side of the surface of the metal plate on which the resin layer is formed. Alternatively, the resin layer has a rising portion formed integrally with the resin layer from the end portion of the metal plate, and the end portion of the metal plate is inserted into the rising portion with a predetermined dimension. With these structures, resin portions are formed on both surfaces of the metal plate, and the resin portion is configured to hold the metal plate and can be integrated (for example, see Patent Document 1).

JP-A-5-124060

  A conventional casing manufacturing method and mold are integrated by forming a resin part on both surfaces of a metal plate and holding the metal plate on the resin part. However, in this structure, the resin part is formed on both sides of the metal plate, so the thickness of the casing is considerable, and it is difficult to secure an effective space inside the casing. For example, there is a problem that it is harmful to downsizing and thinning of electronic devices. In addition, since there is some variation in the size and shape accuracy of the metal plate, when placing the metal plate in the mold, a gap is formed between the metal plate and the mold, and the resin is in the process of injecting the resin. There is a possibility of leakage from the gap. Then, the leaked resin is formed as a burr together with the resin molded body, and there is a problem that the dimensional accuracy of the corresponding part of the resin molded body is deteriorated or the burr is released inside the housing during use. Further, since the resin portion is structured to hold the sheet metal, when the resin molding shrinkage is constrained by the sheet metal, thermal stress is generated at that portion. This thermal stress sometimes leads to warping after molding and a decrease in strength.

  The present invention has been made in order to solve the above-described problems, and can reduce the size and thickness of the housing while firmly integrating two types of members having different melting points. It aims at providing the manufacturing method and metal mold | die of a body.

The present invention includes a first member formed of a first material having a first melting point and a second member formed of a second material having a second melting point lower than the first melting point. In a manufacturing method of a housing having the member,
An embedded portion where the end portion of the first member is bent and the end portion is embedded in the second member, and a joint portion where the first member and the second member are joined to each other only on one surface. Forming continuously,
The bending direction of the end portion of the first member is the joining direction with the second member at the joining location of the first member,
The bending start position of the end of the first member is formed in the vicinity of the boundary position between the buried part and the joint part or the boundary position between the buried part and the joint part.

The method for manufacturing a housing according to the present invention includes a first member formed of a first material having a first melting point, and a second material having a second melting point lower than the first melting point. In the manufacturing method of the housing | casing which has the 2nd member formed from,
An embedded portion where the end portion of the first member is bent and the end portion is embedded in the second member, and a joint portion where the first member and the second member are joined to each other only on one surface. Forming continuously,
The bending direction of the end portion of the first member is the joining direction with the second member at the joining location of the first member,
Since the bending start position of the end of the first member is formed in the vicinity of the boundary position between the buried part and the joint part or the boundary position between the buried part and the joint part,
The housing can be made smaller and thinner while firmly integrating the two types of members.

Embodiment 1 FIG.
Embodiments of the present invention will be described below. FIG. 1 is a perspective view showing a configuration of a mobile phone as an electronic apparatus constituted by a casing in Embodiment 1 of the present invention, and FIG. 2 is a first member of the casing of the mobile phone shown in FIG. FIG. 3 is an enlarged partial perspective view showing details of a portion in the round frame II formed from the second member, and FIG. 3 is formed from the first member and the second member of the housing shown in FIG. It is sectional drawing which shows the manufacturing method in a location.

  In FIG. 1, in the first embodiment, a mobile phone is shown as an example of an electronic device in which a casing is used. The mobile phone includes a first part 1 that forms the front side of the casing 100, a second part 2 that forms the back side of the casing 100, a battery cover 3, and a terminal portion formed on the battery cover 3. 4 and the like. Although not shown, it goes without saying that other components such as an electronic board, a battery, a display unit, operation buttons, and a radio wave transmission / reception unit for communication are incorporated in the mobile phone.

  And the 1st component 1 which comprises the front side of the housing | casing 100 is formed in the part of the frame in which a display part is integrated with the 1st material of the 1st material which has a 1st melting point, for example 1st Polymer alloy of member 5 and second material 60 having other melting point lower than the first melting point, such as polycarbonate resin and acrylonitrile-butadiene-styrene resin (hereinafter referred to as PC + ABS resin) It has the location comprised with the 2nd member 6 formed by. The thickness of the stainless steel sheet constituting the first member 5 used here may be about 0.3 mm, for example. The PC + ABS resin forming the second member 6 is difficult to be molded because it is solidified at this thickness when filled into a mold in a molten state and molded into a desired shape. It is.

  In FIG. 2, the first member 5 is bent along the inner surface so as to have the shape of the first component 1 of the housing 100, and the second member 6 is joined to the outer side thereof. The second member 6 includes an anti-joint surface 9 on the side that does not contact the first member 5 that is a design surface of the appearance, a fitting structure portion 10 that is necessary for assembly with other members of the second member 6, and the like. Is formed. Then, in order to integrate the second member 6 and the first member 5, the buried portion Z in which the end portion 5 a of the first member 5 is bent and buried in the second member 6, and the first member 5 is integrated. The joint portion Y where the member 5 and the second member 6 are joined together only on the joint surface 111 which is one surface and the single portion X formed only by the first member 5 are continuously formed. Yes.

  The bending direction of the end portion 5 a of the first member 5 is bent in the bonding direction with the second member 6 at the bonding point Y of the first member 5, that is, in the direction of the bonding surface 111. The bending start position 5c of the end portion 5a of the first member 5 is formed at a boundary position W between the buried portion Z and the joint portion Y. In addition, the tip 5b side of the end 5a of the first member 5 is configured with a concavo-convex structure. This is formed integrally so that the concave-convex structure on the tip 5b side bites into the second member 6, restrains the relative displacement of both in the direction along the end portion 5a of the first member 5, This is because it is firmly integrated. The end portion 5a of the first member 5 does not indicate the tip of the first member 5 in the first embodiment, but indicates the entire bent portion of the first member 5. is there.

  In FIG. 3, the mold 11 is composed of a first mold part 12 and a second mold part 13, and a cavity 14 is formed by these parts. The first mold part 12 and the second mold part 13 are formed so that the cavity 14 can be inserted into the end 5a of the first member 5 and the part corresponding to the joint part Y. Has been. In addition, the mold 11 has a filling start position 15 of the second material 60 formed on the joining side of the first member 5 at the joining position Y with the second member 6, and is filled with the second material 60. Is formed such that the filling direction is the direction of the end portion 5a of the first member 5 from the joining side with the second member 6 at the joining location Y of the first member 5. The shape of the filling start position 15 can be formed by any of a pin gate, a submarine gate, a side gate, a direct gate, a fan gate, and the like.

  Next, a method for manufacturing the casing of the electronic device according to the first embodiment configured as described above will be described with reference to FIG. First, a predetermined position in the cavity 14 formed by the mold 11 composed of the first mold part 12 and the second mold part 13, that is, the end 5a of the first member 5 and The first member 5 is installed at a location corresponding to the joint location Y (FIG. 3A). When the first member 5 is inserted into the cavity 14 of the mold 11, the end 5a of the first member 5 is bent, so that the end 5a of the first member 5 is straight and straight. Compared with the case where the first member 5 is formed, the bending of the end portion 5a serves as a guide (guide) and is inserted into the cavity 14 of the mold 11, so that the first member 5 can be easily installed. Has an effect.

  And when installing the 1st member 5 in the metal mold | die 11 in this way, since the 1st member 5 is generally manufactured in large quantities in press molding etc., each individual inner dimension B is manufactured to the same dimension. It is almost impossible to do so, and variations occur. Further, even if the first member 5 is made to have the same dimensions, there is a possibility that an error occurs in the installation on the mold 11. Accordingly, a gap A is generated between the dimension B and the dimension C of the first mold part 12. However, although the gap A in FIG. 3 is shown exaggeratedly large, it is considered that the gap A actually has a size of several microns to several tens of microns. Further, in order to allow the first member 5 to be inserted into the mold 11, the tolerance is set so that the dimension B is formed to be larger than the dimension C even if it is formed to be the smallest within the range of variation. Needless to say.

  Next, the melted second material 60 is filled into the cavity 14 of the mold 11 from the filling start position 15 (FIG. 3B). Therefore, the filling direction of the second material 60 is a direction in which the second material 60 flows from the joining side with the second member 6 at the joining portion Y of the first member 5 toward the end portion 5 a of the first member 5. And since the edge part 5a of the 1st member 5 is bent and formed in the burying location Z, the flow path of the 2nd material 60 is narrowed (pressure loss part D). Next, when the filling of the second material 60 proceeds, the first member 5 is pushed by the filling pressure of the second material 60 and falls inward. Then, the bending start position 5c of the first member 5 and the first mold portion 12 come into contact at the point E (FIG. 3C). Thus, the pressure loss portion D causes the second material 60 to flow around the end portion 5a of the first member 5 and not flow into the gap A first, but flows into the gap A with a delay. Therefore, after the bending start position 5c of the first member 5 and the first mold part 12 come into contact with each other at the point E and the gap A is surely sealed, the second material 60 moves toward the point E. Filled in.

  Next, the second material 60 is completely filled, and the second material 60 is completely solidified to form the second member 6 (FIG. 3D). Then, the first mold part 12 and the second mold part 13 are separated from each other, and the first member 5 and the second member 6 are integrated. When the second material 60 and the first member 5 are molded so as to be integrated, if the molding contraction of the second material 60 is constrained by the first member 5, the portion is heated. Stress is generated. This thermal stress causes warping and strength reduction after molding. However, since the tip 5b side of the end portion 5a of the first member 5 is formed in a concavo-convex structure, the second member 6 is restrained at the minimum part, and the other parts are released from restraint. Therefore, thermal stress can be relieved and residual stress can be minimized.

  In the case manufacturing method and the mold according to the first embodiment configured as described above, the bending direction of the end portion of the first member is the bonding direction with the second member at the bonding portion of the first member. In addition, since the bending start position of the end portion of the first member is formed at the boundary position between the buried portion and the joining portion, the folding start position of the first member is easy to be a mold. It becomes possible to contact. Further, the folding start position of the end of the first member is brought into contact with the mold by the filling pressure of the second material into the cavity, so that the folding start position of the first member is reliably brought into contact with the mold. It becomes possible to contact.

  Furthermore, since the filling direction of the second material is the end direction of the first member from the joining side with the second member at the joining position of the first member, the first member and the mold It is possible to delay the entry of the second material into the gap. From these things, it can prevent that a 2nd material leaks from a clearance gap and a burr | flash is formed. Therefore, the deterioration of the accuracy of the inner dimension of the first part occurring in the burr is improved, and the possibility that the burr is peeled off during use of the mobile phone and is released inside the housing is reduced. In addition, since the first material is formed of a metal material and the second material is formed of a resin material, the strength of the first member made of the first material can be easily obtained. The degree of freedom of the external shape of the second member made of the second material is improved.

  Moreover, as a structure for integrating the conventional 1st member and 2nd member, it was formed by the 3 layer structure pinched | interposed by the 2nd member from both surfaces of the 1st member. Therefore, when the second material constituting the second member is filled in a melted state and formed into a desired shape, the layer of the second member is avoided in order to avoid a situation where the second member is solidified and cannot be filled. A sufficient thickness is required, and the thickness of the three-layer structure to be integrated is formed thick. However, in the first embodiment, only the buried portion where the end portion of the first member is buried in the second member has a three-layer structure, and the other portions are formed by the first member and the second member. Since it is formed with a two-layer structure of joint portions to be formed, and a single-layer structure of a single portion made of only the first member, the thickness of the integrated portion can be made thinner. And the rigidity of a housing | casing can be improved by integrating a 1st member and a 2nd member in this way. Therefore, using such a housing for an electronic device whose size and thickness are extremely advanced is even more effective for the size and thickness. In addition, although a part of 2nd member with an embedding location is formed thinly, since it is local, the 2nd material which comprises a 2nd member may solidify on the way and cannot fill it Can be prevented.

  In particular, the casing part where the display unit is installed needs to be strong enough to protect the display unit from external forces and impacts. Greatly needed. However, in the first embodiment, it is possible to dispose the display unit at a single location consisting of only the first member, and the display unit can be easily installed and the thickness can be reduced. It becomes possible. In addition, it may be possible to form the entire casing with a member that is excellent in strength and can be thinly formed, such as the first member made of a metal material. The degree of freedom of the design of the appearance of the body is reduced. Furthermore, in the case of an electronic device equipped with a radio wave transmission / reception unit for communication such as a mobile phone, if all cases are formed of a metal material such as the first member, there is a problem in radio wave transmission / reception. Therefore, the use of the first member made of a metal material is limited. Therefore, in such a case, it is effective to use a housing formed of the first member and the second member as in the first embodiment.

Embodiment 2. FIG.
4 is a perspective view showing a configuration of a camera as an electronic apparatus constituted by a housing according to Embodiment 2 of the present invention, and FIG. 5 shows a first member and a first member of the camera housing shown in FIG. FIG. 6 is an enlarged partial perspective view showing details of a portion in the round frame V formed from the members of FIG. 2, and FIG. 6 is a diagram showing a portion formed from the first member and the second member of the housing shown in FIG. It is sectional drawing which shows a manufacturing method.

  In FIG. 4, in the second embodiment, a camera is shown as an example of an electronic device in which a housing is used. This camera includes a first part 21 that forms the front side of the casing 101 and a second part 22 that forms the back side of the casing 101. Although not shown, it goes without saying that an electronic board, a battery, a lens, and the like are incorporated in the camera. And the 1st component 21 which comprises the front side of the housing | casing 101 is the 1st member 25 formed with the 1st material of the 1st material which has the 1st melting point, for example, stainless steel sheet, and other parts are the 1st In the second member 26 formed of a second resin 260 having a second melting point lower than the melting point of 1, for example, a polycarbonate resin (hereinafter referred to as a PC resin) reinforced with glass fiber. It has a constructed part. The thickness of the stainless steel sheet constituting the first member 25 used here may be about 0.3 mm, for example. The PC resin forming the second member 26 is difficult to be molded because it is solidified at this thickness when filled into a mold in a molten state and molded into a desired shape. It is.

  In FIG. 5, the first member 25 is bent along the inner surface so as to have the shape of the first component 21 of the housing 101, and the second member 26 is joined to the outer side thereof. The second member 26 includes an anti-joint surface 29 on the side that does not contact the first member 25 that is a design surface of the appearance, a fitting structure portion 210 that is necessary for assembly with other members of the second member 26, and the like. Is formed. Then, in order to integrate the second member 26 and the first member 25, the buried portion Z in which the end portion 25a of the first member 25 is bent and buried in the second member 26, and the first member 25 is integrated. A joint portion Y where the member 25 and the second member 26 are joined only by the joint surface 211 that is one surface of the member 25 and a single portion X formed only by the first member 25 are continuously formed. Yes.

  The bending direction of the end portion 25 a of the first member 25 is bent in the bonding direction with the second member 26 at the bonding point Y of the first member 25, that is, in the direction of the bonding surface 211. Further, the bending start position 25c of the end portion 25a of the first member 25 is formed in the vicinity of the boundary position W between the buried portion Z and the joint portion Y. Further, the tip 25b side of the end portion 25 of the first member 25 is constituted by a concavo-convex structure as in the first embodiment and has the same effect (not shown in the drawing). . Note that the end portion 25a of the first member 25 does not indicate the tip of the first member 25 in the second embodiment, but indicates the entire bent portion of the first member 25. is there.

  In FIG. 6, the mold 31 includes a first mold part 32 and a second mold part 33, and a cavity 34 is formed by these parts. The first mold part 32 and the second mold part 33 are formed so that the cavity 34 can be inserted into the end 25a of the first member 25 and the part corresponding to the joint part Y. Has been. Further, in the mold 31, the filling start position 215 of the second material 60 is formed on the joining side with the second member 26 at the joining point Y of the first member 25 as in the first embodiment. In addition, the filling of the second material 260 is performed such that the filling direction is from the joining side of the first member 25 at the joining point Y to the second member 26 toward the end 25a of the first member 25. ing. Furthermore, when the first member 25 is inserted into the mold 11 at a location opposite to the end 25a from the bending start position 25c of the end 25a of the first member 25, the first member 25 is inserted. The convex part 320 is formed in the location which opposes. In addition, the shape of the filling start position 215 can be formed by any of a pin gate, a submarine gate, a side gate, a direct gate, a fan gate, etc., for example.

  Next, a method of manufacturing the casing of the electronic device according to the second embodiment configured as described above will be described with reference to FIG. First, as in the first embodiment, a predetermined position in the cavity 34 formed by the mold 31 including the first mold portion 32 and the second mold portion 33, that is, the first The first member 25 is installed at a location corresponding to the end portion 25a of the first member 25 and the joining location Y (FIG. 6A). When the first member 25 is inserted into the cavity 34 of the mold 31, the end 25a of the first member 25 is bent, so that the end 25a of the first member 25 is straight and straight. Compared to the case where the first member 25 is formed, the bending of the end portion 25a becomes a guide (guide) and is inserted into the cavity 34 of the mold 31, so that the first member 25 can be easily installed. Has an effect.

  And when installing the 1st member 25 in the metal mold | die 31 in this way, the clearance gap A generate | occur | produces for the cause similar to the said Embodiment 1. FIG. However, although the gap A in FIG. 6 is shown exaggeratedly large, it is considered that the gap A actually has a size of several microns to several tens of microns. Further, in order to allow the first member 25 to be inserted into the mold 31, the tolerance is set so that the dimension B is formed to be larger than the dimension C even if it is formed to be the smallest within the range of variation. Needless to say.

  Next, the melted second material 260 is filled in the cavity 34 of the mold 31 from the filling start position 215 (FIG. 6B). Therefore, the filling direction of the second material 260 is a direction in which the second material 260 flows from the joining side with the second member 26 at the joining portion Y of the first member 25 toward the end portion 25a of the first member 25. And since the edge part 25a of the 1st member 25 is bent and formed in the burying location Z, the flow path of the 2nd material 260 is narrowed (pressure loss part D). Next, when the filling of the second material 260 proceeds, the first member 25 is pushed by the filling pressure of the second material 260 and falls inward. And the convex part 320 and the 1st member 25 which were formed in the location on the opposite side to the edge part 25a from the bending start position 25c of the 1st member 25 of the metal mold | die 31 contact at E point (FIG. 6). (C)). As described above, the second material 260 does not flow around the end portion 25a of the first member 25 by the pressure loss portion D, and does not flow into the gap A first, but flows into the gap A with a delay. Therefore, the first member 25 corresponding to the convex portion 320 opposite to the end portion 25a from the bending start position 25c of the first member 25 contacts the first member 25 at the point E, and the gap A is reliably sealed. The second material 260 flows into the E point and is filled.

  Next, the second material 260 is completely filled, and the second material 260 is completely solidified to form the second member 26 (FIG. 6D). Then, the first mold part 32 and the second mold part 33 are separated from each other, and the first member 25 and the second member 26 are integrated. When the second material 260 and the first member 25 are molded so as to be integrated, if the molding contraction of the second material 260 is constrained by the first member 25, the portion is heated. Stress is generated. This thermal stress causes warping and strength reduction after molding. However, since the tip 25b side of the end portion 25a of the first member 25 is formed in a concavo-convex structure, the second member 26 is restrained at a minimum portion, and the other portions are released from restraint. Therefore, thermal stress can be relieved and residual stress can be minimized.

  In the manufacturing method and mold of the housing of the second embodiment configured as described above, the bending direction of the end portion of the first member is the joining position of the first member, as in the first embodiment. And the bending start position of the end of the first member is formed in the vicinity of the boundary position between the buried part and the joint part. The first member at a location corresponding to the convex portion of the mold that is in the vicinity of the bending start position of the member can easily come into contact with the convex portion of the mold. Further, due to the filling pressure of the second material into the cavity, the first member and the convex portion of the mold corresponding to the convex portion of the mold near the folding start position of the end portion of the first member. , The portion corresponding to the convex portion of the mold, which is in the vicinity of the bending start position of the first member, can surely come into contact with the convex portion of the mold. In addition, all the filling pressure applied to the first member is received by the convex portion of the mold, and the contact can be made stronger.

  Furthermore, since the filling direction of the second material is the end direction of the first member from the joining side with the second member at the joining position of the first member, the first member and the mold It is possible to delay the entry of the second material into the gap. From these things, it can prevent that a 2nd material leaks from a clearance gap and a burr | flash is formed. Therefore, the deterioration of the accuracy of the inner dimension of the first part occurring in the burr is improved, and the possibility that the burr peels off during use of the camera and is released inside the housing is reduced. In addition, since the first material is formed of a metal material and the second material is formed of a resin material, the strength of the first member made of the first material can be easily obtained. The degree of freedom of the external shape of the second member made of the second material is improved.

  Moreover, as a structure for integrating the conventional 1st member and 2nd member, it was formed by the 3 layer structure pinched | interposed by the 2nd member from both surfaces of the 1st member. Therefore, when the second material constituting the second member is filled in a melted state and formed into a desired shape, the layer of the second member is avoided in order to avoid a situation where the second member is solidified and cannot be filled. A sufficient thickness is required, and the thickness of the three-layer structure to be integrated is formed thick. However, in the second embodiment, only the buried portion where the end portion of the first member is buried in the second member has a three-layer structure, and the other portions are formed by the first member and the second member. Since it is formed with a two-layer structure of joint portions to be formed, and a single-layer structure of a single portion made of only the first member, the thickness of the integrated portion can be made thinner. And the rigidity of a housing | casing can be improved by integrating a 1st member and a 2nd member in this way. Therefore, using such a housing for an electronic device whose size and thickness are extremely advanced is even more effective for the size and thickness. In addition, although a part of 2nd member with an embedding location is formed thinly, since it is local, the 2nd material which comprises a 2nd member may solidify on the way and cannot fill it Can be prevented.

  In particular, when installing a member that requires strength during installation, such as a lens or an optical element, the portion of the housing needs to have a high strength. A large thickness is required. However, in the second embodiment, it is possible to dispose the member at a single part consisting of only the first member, and the member can be easily installed and formed with a small thickness. It becomes possible. In addition, it may be possible to form the entire casing with a member that is excellent in strength and can be thinly formed, such as the first member made of a metal material. The degree of freedom of the design of the appearance of the body is reduced.

Embodiment 3 FIG.
FIG. 7 is a perspective view showing a configuration of a camera as an electronic apparatus constituted by a casing according to Embodiment 3 of the present invention, and FIG. 8 shows a first member and a first member of the camera casing shown in FIG. FIG. 9 is an enlarged partial perspective view showing details of a portion in the round frame VIII formed from the two members, and FIG. 9 is a portion at the portion formed from the first member and the second member of the housing shown in FIG. It is sectional drawing which shows a manufacturing method.

  In FIG. 7, in the third embodiment, a camera is shown as an example of an electronic device in which a casing is used. As in the second embodiment, the camera is configured by a first part 321 that forms the front side of the housing 102 and a second part 322 that forms the back side of the housing 102. Although not shown, it goes without saying that an electronic board, a battery, a lens, and the like are incorporated in the camera. The first part 321 constituting the front side of the housing 102 includes a first member 35 formed of, for example, a stainless steel sheet of the first material having the first melting point, and the other parts are the first parts 321. For example, the second material 360 having a second melting point lower than the melting point of the first material 360 has a portion constituted by the second member 36 formed of, for example, PC resin. The thickness of the stainless steel sheet constituting the first member 35 used here may be about 0.3 mm, for example. Note that it is difficult to mold to this thickness with the PC resin forming the second member 36.

  In FIG. 8, the first member 35 is bent along the inner surface so as to have the shape of the first component 321 of the housing 102, and the second member 36 is joined to the outer side. The second member 36 includes an anti-joint surface 39 on the side that does not contact the first member 35 that is a design surface of the appearance, a fitting structure portion 310 that is necessary for assembly with other members of the second member 36, and the like. Is formed. Then, in order to integrate the second member 36 and the first member 35, the buried portion Z in which the end portion 35 a of the first member 35 is bent and buried in the second member 36, and the first member 35 is integrated. The joint portion Y where the member 35 and the second member 36 are joined together only by the joint surface 311 which is one surface and the single portion X formed only by the first member 35 are continuously formed. Yes.

  The bending direction of the end portion 35 a of the first member 35 is bent in the bonding direction with the second member 36 at the bonding point Y of the first member 35, that is, in the direction of the bonding surface 311. The bending start position 35 c of the end portion 35 a of the first member 35 is formed at a boundary position W between the buried portion Z and the joint portion Y. A protruding portion 35 d that protrudes in a direction opposite to the bending direction of the end portion 35 a of the first member 35 is formed at the bending start position 35 c that is the end portion 35 a of the first member 35. Further, the tip 35b side of the end portion 35a of the first member 35 is constituted by a concavo-convex structure as in the above embodiments, and has the same effect (omitted from the drawing). . The end portion 35a of the first member 35 does not indicate the tip of the first member 35 in the third embodiment, but indicates the entire bent portion of the first member 35. is there.

  In FIG. 9, the mold 331 includes a first mold part 332 and a second mold part 333, and a cavity 334 is formed by these. Then, the first mold part 332 and the second mold part 333 are formed so that the cavity 334 can be inserted into the end 35a of the first member 35 and the part corresponding to the joint part Y. Has been. Further, in the mold 331, the filling start position 315 of the second material 360 is formed on the joining side with the second member 36 at the joining point Y of the first member 35 as in the above embodiments. In addition, the filling of the second material 360 is performed such that the filling direction is from the joining side with the second member 36 at the joining portion Y of the first member 35 to the end portion 35a direction of the first member 35. ing. In addition, the shape of the filling start position 315 can be formed by any of a pin gate, a submarine gate, a side gate, a direct gate, a fan gate, and the like.

  Next, a method for manufacturing the casing of the electronic device according to the third embodiment configured as described above will be described with reference to FIG. First, as in the above embodiments, a predetermined position in the cavity 334 formed by the mold 331 composed of the first mold portion 332 and the second mold portion 333, that is, the first The first member 35 is installed at a location corresponding to the end 35a of the first member 35 and the joining location Y (FIG. 9A). When the first member 35 is inserted into the cavity 334 of the mold 331, since the end portion 35a of the first member 35 is bent, the end portion 35a of the first member 35 is straight and straight. Compared with the case where it is formed, the bending of the end portion 35a is guided (guided) and inserted into the cavity 334 of the mold 331, so that the first member 35 can be easily installed. Has an effect.

  And when installing the 1st member 35 in the metal mold | die 331 in this way, the clearance gap A generate | occur | produces for the cause similar to said each embodiment. However, although the gap A in FIG. 9 is shown exaggeratedly large, it is conceivable that the gap A actually has a size of several microns to several tens of microns. Further, in order to allow the first member 35 to be inserted into the mold 331, the tolerance is set so that the dimension B is formed to be larger than the dimension C even if it is formed to be the smallest within the range of variation. Needless to say.

  Next, the melted second material 360 is filled into the cavity 334 of the mold 331 from the filling start position 315 (FIG. 9B). Therefore, the filling direction of the second material 360 is a direction in which the second material 360 flows from the joining side with the second member 36 at the joining portion Y of the first member 35 toward the end portion 35 a of the first member 35. And since the edge part 35a of the 1st member 35 is bent and formed in the burying location Z, the flow path of the 2nd material 360 is narrowed (pressure loss D). Next, when the filling of the second material 360 proceeds, the first member 35 is pushed by the filling pressure of the second material 360 and falls inward. Then, the protrusion 35d formed at the bending start position 35c of the first member 35 and the first mold part 12 come into contact at the point E (FIG. 9C). Thus, the pressure loss portion D causes the second material 360 to flow around the end portion 35a of the first member 35 and not flow into the gap A first, but flows into the gap A with a delay. Therefore, after the protrusion 35d formed at the bending start position 35c of the first member 35 and the first mold portion 12 come into contact at the point E and the gap A is reliably sealed, the second Material 360 flows into the E point and fills.

  Next, the second material 360 is completely filled, and the second material 360 is completely solidified to form the second member 36 (FIG. 9D). Then, the first mold part 332 and the second mold part 333 are separated from each other, and the first member 35 and the second member 36 are integrated. When the second material 360 and the first member 35 are molded so as to be integrated, if the molding contraction of the second material 360 is constrained by the first member 35, the portion is heated. Stress is generated. This thermal stress causes warping and strength reduction after molding. However, since the tip 35b side of the end portion 35a of the first member 35 is formed in a concavo-convex structure, the second member 36 is restrained at the minimum portion, and the other portions are released from restraint. Therefore, thermal stress can be relieved and residual stress can be minimized.

  In the manufacturing method and the mold of the casing of the third embodiment configured as described above, the bending direction of the end portion of the first member is the joining position of the first member, as in the above embodiments. Since the bending start position of the end portion of the first member is formed at the boundary position between the buried portion and the joining portion, the first member is bent in the joining direction with the second member. The protrusion formed at the bending start position and the mold can easily come into contact with each other. Further, the mold is formed at the folding start position of the first member by bringing the protrusion at the folding start position of the end of the first member into contact with the mold by the filling pressure of the second material into the cavity. The protruding portion and the mold can be reliably brought into contact with each other. In addition, the filling pressure applied to the first member is all received by the protrusions at the bending start position of the end portion of the first member, and the contact can be made stronger.

  Furthermore, since the filling direction of the second material is the end direction of the first member from the joining side with the second member at the joining position of the first member, the first member and the mold It is possible to delay the entry of the second material into the gap. From these things, it can prevent that a 2nd material leaks from a clearance gap and a burr | flash is formed. Therefore, the deterioration of the accuracy of the inner dimension of the first part occurring in the burr is improved, and the possibility that the burr peels off during use of the camera and is released inside the housing is reduced. In addition, since the first material is formed of a metal material and the second material is formed of a resin material, the strength of the first member made of the first material can be easily obtained. The degree of freedom of the external shape of the second member made of the second material is improved.

  Moreover, as a structure for integrating the conventional 1st member and 2nd member, it was formed by the 3 layer structure pinched | interposed by the 2nd member from both surfaces of the 1st member. Therefore, when the second material constituting the second member is filled in a melted state and formed into a desired shape, the layer of the second member is avoided in order to avoid a situation where the second member is solidified and cannot be filled. A sufficient thickness is required, and the thickness of the three-layer structure to be integrated is formed thick. However, in the third embodiment, only the buried portion where the end portion of the first member is buried inside the second member has a three-layer structure, and the other portions are formed by the first member and the second member. Since it is formed with a two-layer structure of joint portions to be formed, and a single-layer structure of a single portion made of only the first member, the thickness of the integrated portion can be made thinner. And the rigidity of a housing | casing can be improved by integrating a 1st member and a 2nd member in this way. Therefore, using such a housing for an electronic device whose size and thickness are extremely advanced is even more effective for the size and thickness. In addition, although a part of 2nd member with an embedding location is formed thinly, since it is local, the 2nd material which comprises a 2nd member may solidify on the way and cannot fill it Can be prevented.

  In particular, when installing a member that requires strength during installation, such as a lens or an optical element, the portion of the housing needs to have high strength. Is greatly needed. However, in the third embodiment, it is possible to dispose the member at a single part consisting of only the first member, and the member can be easily installed and the thickness can be reduced. It becomes possible. In addition, it may be possible to form the entire casing with a member that is excellent in strength and can be thinly formed, such as the first member made of a metal material. The degree of freedom of the design of the appearance of the body is reduced.

Embodiment 4 FIG.
FIG. 10 is a perspective view showing the configuration of a portable music player as an electronic device constituted by the casing according to Embodiment 4 of the present invention, and FIG. 11 shows the casing of the portable music player shown in FIG. FIG. 12 is an enlarged partial perspective view showing details of a portion in the round frame XI formed from the first member and the second member of the body, and FIG. 12 shows the first member and the second member of the housing shown in FIG. It is sectional drawing which shows the manufacturing method in the location formed from this member.

  In FIG. 10, in the fourth embodiment, a portable music player is shown as an example of an electronic device using a casing. The portable music player includes a first part 41 that forms the front side of the housing 103 and a second part 42 that forms the back side of the housing 103. Although not shown, it goes without saying that an electronic board, a battery, a display unit, operation buttons, and the like are incorporated in the portable music player. And the 1st component 41 which comprises the front side of the housing | casing 103 is the 1st member 43 formed with the 1st material of the 1st material which has a 1st melting point, for example, stainless steel sheet, and the other site | part is 1st. The second material 440 having a second melting point lower than the melting point of 1, for example, a second member 44 formed of a polyamide resin (hereinafter referred to as a PA resin) reinforced with glass fiber. It has a place that is. The thickness of the tentress sheet metal constituting the first member 43 used here may be about 0.2 mm, for example. It should be noted that it is difficult to mold to this thickness with the PA resin forming the second member 44.

  In FIG. 11, the first member 43 is formed to have the shape of the first component 41 of the housing 103, and the second member 44 is joined to the outside thereof. The second member 44 includes an anti-joint surface 46 on the side that does not contact the first member 43 that is a design surface of the appearance, a fitting structure portion 47 that is necessary for assembly with other members of the second member 44, and the like. Is formed. Then, in order to integrate the second member 44 and the first member 43, the buried portion Z in which the end 43a of the first member 43 is bent and buried in the second member 44, and the first member 43 is integrated. A joint portion Y where the member 43 and the second member 44 are joined together only on the joint surface 411 which is one surface and a single portion X formed only by the first member 43 are continuously formed. Yes.

  The bending direction of the end 43 a of the first member 43 is bent in the bonding direction with the second member 44 at the bonding point Y of the first member 43, that is, in the direction of the bonding surface 411. The bending start position 43 c of the end portion 43 a of the first member 43 is formed at a boundary position W between the buried portion Z and the joint portion Y. Moreover, the recessed part 44a is formed in the location corresponding to the projection part currently formed in the metal mold | die 51 mentioned later. Further, the tip 43b side of the end portion 43a of the first member 43 is configured with a concavo-convex structure as in the above embodiments, and has the same effect (not shown in the drawing). . Note that the end portion 43a of the first member 43 does not indicate the tip of the first member 43 in the third embodiment, but indicates the entire bent portion of the first member 43. is there.

  In FIG. 12, a mold 51 is composed of a first mold part 52 and a second mold part 53, and a cavity 54 is formed by these parts. The first mold part 52 and the second mold part 53 are formed so that the cavity 54 can be inserted into the end 43a of the first member 43 and the part corresponding to the joint part Y. Has been. Further, in the mold 51, the filling start position 515 of the second material 440 is formed on the joining side with the second member 44 at the joining point Y of the first member 43, as in the above embodiments. The filling of the second material 440 is performed so that the filling direction is from the joining side of the first member 43 to the second member 44 at the joining point Y to the end 43a of the first member 43. ing. In addition, a protrusion 55 is provided at a location facing the end 43 a of the first member 43 of the mold 51 and protruding in a direction opposite to the bending direction of the end 43 a of the first member 43. The shape of the filling start position 515 can be any of a pin gate, a submarine gate, a side gate, a direct gate, a fan gate, and the like.

  Next, a method for manufacturing the casing of the electronic device according to the fourth embodiment configured as described above will be described with reference to FIG. First, as in each of the above embodiments, a predetermined position in the cavity 54 formed by the mold 51 including the first mold portion 52 and the second mold portion 53, that is, the first The 1st member 43 is installed in the location corresponding to the edge part 43a of the 1 member 43, and the joining location Y (FIG. 12 (a)). And when installing the 1st member 43 in the metal mold | die 51 in this way, the clearance gap A generate | occur | produces for the cause similar to said each embodiment. However, although the gap A in FIG. 12 is shown exaggeratedly large, it is considered that the gap A actually has a size of several microns to several tens of microns.

  Next, the melted second material 440 is filled into the cavity 54 of the mold 51 from the filling start position 515 (FIG. 12B). Therefore, the filling direction of the second material 440 is a direction in which the second material 440 flows from the joining side with the second member 44 at the joining portion Y of the first member 43 toward the end portion 43 a of the first member 43. Since the end portion 43a of the first member 43 is bent at the buried portion Z, the flow path toward the gap A of the second material 440 is narrowed. Further, here, the protrusion 51 protrudes in a position opposite to the end 43a of the first member 43 of the mold 51 and in a direction opposite to the bending direction of the end 43a of the first member 43. The flow path of the second material 440 is further narrowed, and the pressure loss in the filling of the second material 440 can be reliably obtained. Next, when the filling of the second material 440 proceeds, the first member 43 is pushed by the filling pressure of the second material 440 and falls inward. And the bending start position 43c of the 1st member 43 and the 2nd metal mold | die part 53 contact at E point (FIG.12 (c)). As described above, the pressure loss portion D causes the second material 440 to flow around the end portion 43a of the first member 43 and not flow into the gap A first, but flows into the gap A with a delay. Therefore, after the bending start position 43c of the first member 43 and the second mold part 53 come into contact with each other at the point E and the gap A is reliably sealed, the second material 440 moves toward the point E. Filled in by flow.

  Next, the second material 440 is completely filled, and the second material 440 is completely solidified to form the second member 44 (FIG. 12D). Then, the first mold part 52 and the second mold part 53 are separated from each other, and the first member 43 and the second member 44 are integrated. When the second material 440 and the first member 43 are molded so as to be integrated, if the molding contraction of the second material 440 is constrained by the first member 43, the portion is heated. Stress is generated. This thermal stress causes warping and strength reduction after molding. However, since the tip 43b side of the end portion 43a of the first member 43 is formed in a concavo-convex structure, the second member 44 is restrained at a minimum part, and other parts are released from restraint. Therefore, thermal stress can be relieved and residual stress can be minimized.

  In the manufacturing method and the mold of the casing of the fourth embodiment configured as described above, the bending direction of the end portion of the first member is the joining position of the first member, as in the above embodiments. Since the bending start position of the end portion of the first member is formed at the boundary position between the buried portion and the joining portion, the first member is bent in the joining direction with the second member. The bending start position and the mold can be easily brought into contact with each other. Furthermore, the bending start position of the first member and the mold are reliably brought into contact with the mold by contacting the bending start position of the end of the first member with the mold by the filling pressure into the cavity of the second material. Abutment is possible.

  Furthermore, since the filling direction of the second material is the end direction of the first member from the joining side with the second member at the joining position of the first member, the first member and the mold It is possible to delay the entry of the second material into the gap. Furthermore, since the protrusion part which protrudes in the location opposite to the edge part of the 1st member of a metal mold | die and the direction opposite to the bending direction of the edge part of the 1st member is formed here, 1st It is possible to reliably delay the second material from entering the gap between the member and the mold. From these things, it can prevent that a 2nd material leaks from a clearance gap and a burr | flash is formed. Therefore, the deterioration of the accuracy of the dimension of the first part that has occurred in the burr is improved, and the possibility that the burr is peeled off during use of the portable music player and is released inside the housing is reduced. In addition, since the first material is formed of a metal material and the second material is formed of a resin material, the strength of the first member made of the first material can be easily obtained. The degree of freedom of the external shape of the second member made of the second material is improved.

  Moreover, as a structure for integrating the conventional 1st member and 2nd member, it was formed by the 3 layer structure pinched | interposed by the 2nd member from both surfaces of the 1st member. Therefore, when the second material constituting the second member is filled in a melted state and formed into a desired shape, the layer of the second member is avoided in order to avoid a situation where the second member is solidified and cannot be filled. A sufficient thickness is required, and the thickness of the three-layer structure to be integrated is formed thick. However, in the fourth embodiment, only the buried portion where the end portion of the first member is buried in the second member has a three-layer structure, and the other portions are formed by the first member and the second member. Since it is formed with a two-layer structure of joint portions to be formed, and a single-layer structure of a single portion made of only the first member, the thickness of the integrated portion can be made thinner. And the rigidity of a housing | casing can be improved by integrating a 1st member and a 2nd member in this way. Therefore, using such a housing for an electronic device whose size and thickness are extremely advanced is even more effective for the size and thickness. In addition, although a part of 2nd member with an embedding location is formed thinly, since it is local, the 2nd material which comprises a 2nd member may solidify on the way and cannot fill it Can be prevented.

  In particular, since the strength of the portion of the housing where the display unit is to be installed is required, a large thickness is required if the portion where the display unit is provided is formed only with a resin material. However, in the fourth embodiment, it is possible to dispose the display unit at a single location consisting only of the first member, and the display unit can be easily installed and formed with a small thickness. It becomes possible. In addition, it may be possible to form the entire casing with a member that is excellent in strength and can be thinly formed, such as the first member made of a metal material. The degree of freedom of the design of the appearance of the body is reduced.

  In the fourth embodiment, the filling direction in filling the second material is an example in which the end direction of the first member is from the joining side with the second member at the joining position of the first member. However, the present invention is not limited to this. For example, as shown in FIG. 13 and FIG. 14, the first member is joined at a position on the direction side opposite to the joining side with the second member. A case of forming with a filling start position of the material 2 will be described. Note that the configuration of a portable music player as an electronic device configured with a housing is the same as that of FIG. Accordingly, FIG. 13 is an enlarged view showing the details of another example of the portion inside the round frame XI formed from the first member and the second member of the casing of the portable music player shown in FIG. FIG. 14 is a cross-sectional view showing another example of the manufacturing method in a place formed from the first member and the second member of the housing shown in FIG.

  Here, a protruding portion 550 that protrudes in a direction opposite to the end portion 43a of the first member 43 of the mold 51 and in a direction opposite to the bending direction of the end portion 43a of the first member 43 is formed. This protrusion 550 is formed of a wide protrusion extending in the gap A direction from the protrusion 55 shown in FIG. And as shown to Fig.14 (a), the filling start position 516 is formed in the position of the direction side opposite to the joining side with the 2nd member 44 in the joining location Y of the 1st member 43. As shown in FIG. Then, the second material 440 is filled from the filling start position 516. Then, the flow path of the 2nd material 440 which goes to the clearance gap A by the projection part 550 is narrowed, and the pressure loss in filling of the 2nd material 440 can be obtained reliably. Therefore, as shown in FIG. 14B, the second material 440 wraps around the end portion 43 b of the first member 43 and joins the second member 44 at the joint portion Y of the first member 43. To.

  Next, when the filling of the second material 440 proceeds, the first member 43 is pushed by the filling pressure of the second material 440 and falls inward. And the bending start position 43c of the 1st member 43 and the 2nd metal mold | die part 53 contact in E point (FIG.14 (c)). As described above, the second material 440 does not flow first into the gap A of the end portion 43 a of the first member 43 but flows into the gap A with a delay due to the pressure loss portion D. Therefore, after the bending start position 43c of the first member 43 and the second mold part 53 come into contact with each other at the point E and the gap A is reliably sealed, the second material 440 moves toward the point E. Filled in by flow. Thereafter, the second member 440 is completely filled with the second material 440, and the second member 44 is formed by completely solidifying the second material 440 (FIG. 14D). Then, the first mold part 52 and the second mold part 53 are separated from each other, and the first member 43 and the second member 44 are integrated. A recess 44 b is formed at a location corresponding to the protrusion 550 formed on the mold 51.

  By forming the protrusions on the mold as described above, the filling of the second material into the gap A is reliably suppressed. Thus, the filling start position of the second material is set so that the filling direction in filling the second material is from the joining side of the first member to the second member at the joining position of the first member. Therefore, it is possible to form even a portion other than the place where the filling starts, and the degree of freedom of the formation position of the filling start position can be improved.

Embodiment 5 FIG.
FIG. 15 is a perspective view showing the configuration of a portable music player as an electronic apparatus constituted by the casing according to Embodiment 5 of the present invention, and FIG. 16 shows the casing of the portable music player shown in FIG. The fragmentary perspective view which expanded and showed the detail of the location in the round frame XVI formed from the 1st member of a body, and a 2nd member, FIG. 17 is the 1st member and 2nd of the housing | casing shown in FIG. It is sectional drawing which shows the manufacturing method in the location formed from this member.

  In FIG. 15, in the fifth embodiment, a portable music player is shown as an example of an electronic device in which a casing is used. The portable music player includes a first part 71 that forms the front side of the casing 104 and a second part 72 that forms the back side of the casing 104. Although not shown, it goes without saying that an electronic board, a battery, a display unit, operation buttons, and the like are incorporated in the portable music player. And the 1st component 71 which comprises the front side of the housing | casing 104 is the 1st member 73 formed with the 1st material which has the 1st melting point, for example with stainless steel sheet metal, and the other site | part is 1st. The second material 740 having a second melting point lower than the melting point of 1 has a portion constituted by a second member 74 formed of, for example, PA resin. It can be considered that the thickness of the tenless sheet metal constituting the first member 73 used here is, for example, about 0.2 mm. In addition, it is difficult to mold to this thickness with the PA resin forming the second member 74.

  In FIG. 16, the first member 73 is formed so as to have the shape of the first component 71 of the housing 104, and the second member 74 is joined to the outside thereof. The second member 74 includes an anti-joint surface 76 that is not in contact with the first member 73 serving as an appearance design surface, a fitting structure portion 77 that is necessary for assembling with other members of the second member 74, and the like. Is formed. Then, in order to integrate the second member 74 and the first member 73, the buried portion Z in which the end 73a of the first member 73 is bent and buried in the second member 74, and the first member 73 is integrated. A joint portion Y where the member 73 and the second member 74 are joined together only on the joint surface 711 which is one surface and a single portion X formed only by the first member 73 are continuously formed. Yes.

  The bending direction of the end 73 a of the first member 73 is bent in the bonding direction with the second member 74 at the bonding point Y of the first member 73, that is, in the direction of the bonding surface 711. Further, the bending start position 73 c of the end 73 a of the first member 73 is formed at a boundary position W between the buried portion Z and the joint portion Y. Further, the end portion 73 a of the first member 73 is provided with a protruding portion 73 d that protrudes in a direction opposite to the bending direction of the end portion 73 a of the first member 73. Further, the tip 73b side of the end portion 73a of the first member 73 is configured with a concavo-convex structure as in the above embodiments, and has the same effect (not shown in the drawing). . The end portion 73a of the first member 73 does not indicate the tip of the first member 73 in the fifth embodiment, but indicates the entire bent portion of the first member 73. is there.

In FIG. 17, a mold 81 is composed of a first mold part 82 and a second mold part 83, and a cavity 84 is formed by these parts. The first mold part 82 and the second mold part 83 are formed so that the cavity 84 can be inserted into the end 73a of the first member 73 and the part corresponding to the joint part Y. Has been. Further, in the mold 81, the filling start position 815 of the second material 740 is formed on the joining side with the second member 74 at the joining location Y of the first member 73, as in the above embodiments. The filling of the second material 740 is performed so that the filling direction is from the joining side with the second member 74 at the joining point Y of the first member 73 toward the end 73a of the first member 73. ing.
The shape of the filling start position 815 can be formed by any of a pin gate, a submarine gate, a side gate, a direct gate, a fan gate, and the like.

  Next, a method for manufacturing the casing of the electronic device according to the fifth embodiment configured as described above will be described with reference to FIG. First, as in each of the above embodiments, a predetermined position in the cavity 84 formed by the mold 81 including the first mold portion 82 and the second mold portion 83, that is, the first The 1st member 73 is installed in the location corresponding to the edge part 73a of 1 member 73, and the joining location Y (FIG. 17 (a)). And when installing the 1st member 73 in the metal mold | die 81 in this way, the clearance gap A generate | occur | produces for the cause similar to said each embodiment. However, although the gap A in FIG. 17 is shown exaggeratedly large, it is considered that the gap A actually has a size of several microns to several tens of microns.

  Next, the melted second material 740 is filled into the cavity 84 of the mold 81 from the filling start position 815 (FIG. 17B). Therefore, the filling direction of the second material 740 is a direction in which the second material 740 flows from the joining side with the second member 74 at the joining portion Y of the first member 73 toward the end portion 73 a of the first member 73. Since the end 73a of the first member 73 is bent at the buried portion Z, the flow path toward the gap A of the second material 740 is narrowed. Further, here, the flow path of the second material 740 is further narrowed by the protruding portion 73d protruding in the direction opposite to the bending direction of the end 73a of the first member 73, and the pressure in filling the second material 740 A loss can be reliably obtained. Next, when the filling of the second material 740 progresses, the first member 73 is pushed by the filling pressure of the second material 740 and falls inward. And the bending start position 73c of the 1st member 73 and the 2nd metal mold | die part 83 contact in E point (FIG.17 (c)). Thus, the pressure loss portion D causes the second material 740 to flow around the end portion 73a of the first member 73 and not flow into the gap A first, but flows into the gap A with a delay. Therefore, after the bending start position 73c of the first member 73 and the second mold portion 73 contact at the point E and the gap A is reliably sealed, the second material 740 moves toward the point E. Filled in by flow.

  Next, the second material 740 is completely filled, and the second material 740 is completely solidified to form the second member 74 (FIG. 17D). Then, the first mold part 82 and the second mold part 83 are separated from each other, and the first member 73 and the second member 74 are integrated. When the second material 740 and the first member 73 are molded so as to be integrated, if the molding contraction of the second material 740 is constrained by the first member 73, the portion is heated. Stress is generated. This thermal stress causes warping and strength reduction after molding. However, since the tip 73b side of the end 73a of the first member 73 is formed in a concavo-convex structure, the second member 74 is restrained at the minimum part, and other parts are released from restraint. Therefore, thermal stress can be relieved and residual stress can be minimized.

  In the manufacturing method and the mold of the casing of the fifth embodiment configured as described above, the bending direction of the end portion of the first member is the joining position of the first member, as in the above embodiments. Since the bending start position of the end portion of the first member is formed at the boundary position between the buried portion and the joining portion, the first member is bent in the joining direction with the second member. The folding start position and the mold can be easily brought into contact with each other. Furthermore, the bending start position of the first member and the mold are reliably brought into contact with the mold by contacting the bending start position of the end of the first member with the mold by the filling pressure into the cavity of the second material. Abutment is possible.

  Furthermore, since the filling direction of the second material is the end direction of the first member from the joining side with the second member at the joining position of the first member, the first member and the mold It is possible to delay the entry of the second material into the gap. Furthermore, since the protrusion part which protrudes in the direction opposite to the bending direction of the end part of the first member is formed here, the second material enters the gap between the first member and the mold. You can be sure to be late. From these things, it can prevent that a 2nd material leaks from a clearance gap and a burr | flash is formed. Therefore, the deterioration of the accuracy of the dimension of the first part that has occurred in the burr is improved, and the possibility that the burr is peeled off during use of the portable music player and is released inside the housing is reduced. In addition, since the first material is formed of a metal material and the second material is formed of a resin material, the strength of the first member made of the first material can be easily obtained. The degree of freedom of the external shape of the second member made of the second material is improved.

  Moreover, as a structure for integrating the conventional 1st member and 2nd member, it was formed by the 3 layer structure pinched | interposed by the 2nd member from both surfaces of the 1st member. Therefore, when the second material constituting the second member is filled in a melted state and formed into a desired shape, the layer of the second member is avoided in order to avoid a situation where the second member is solidified and cannot be filled. A sufficient thickness is required, and the thickness of the three-layer structure to be integrated is formed thick. However, in the fifth embodiment, only the buried portion where the end portion of the first member is buried inside the second member has a three-layer structure, and the other portions are the first member and the second member. Since it is formed with a two-layer structure of joint portions to be formed, and a single-layer structure of a single portion made of only the first member, the thickness of the integrated portion can be made thinner. And the rigidity of a housing | casing can be improved by integrating a 1st member and a 2nd member in this way. Therefore, using such a housing for an electronic device whose size and thickness are extremely advanced is even more effective for the size and thickness. In addition, although a part of 2nd member with an embedding location is formed thinly, since it is local, the 2nd material which comprises a 2nd member may solidify on the way and cannot fill it Can be prevented.

  In particular, since the strength of the portion of the housing where the display unit is to be installed is required, a large thickness is required if the portion where the display unit is provided is formed only with a resin material. However, in the fifth embodiment, it is possible to dispose the display unit at a single location consisting only of the first member, and the display unit can be easily installed and formed with a small thickness. It becomes possible. In addition, it may be possible to form the entire casing with a member that is excellent in strength and can be thinly formed, such as the first member made of a metal material. The degree of freedom of the design of the appearance of the body is reduced.

In each of the above-described embodiments, the stainless steel sheet metal is shown as an example of the first material. However, the present invention is not limited to this, and various metal sheet metals such as an aluminum alloy, a copper alloy, a magnesium alloy, and a titanium alloy are used. In addition, it can also be applied to die-cast products and cast products of various metals, molded bodies and sheets of various resins, films, and the like. Moreover, although PC resin and PA resin composite-reinforced with PC + ABS resin or glass fiber have been shown as examples as the second material, the present invention is not limited to this, and the first material forming the first member is not limited thereto. What is necessary is just to have the 2nd melting point lower than a 1st melting point, and it can apply also to the material etc. which carried out composite reinforcement | strengthening with other various resin, metal, glass fiber, carbon fiber, etc.
Further, although not particularly shown in the display unit in each of the above embodiments, it is conceivable that a display unit using liquid crystal, for example, is adopted. Since the display unit using the liquid crystal needs to have a high strength at a place where the liquid crystal is installed, the effect is exhibited when it is adopted in the present invention.

  Moreover, although the example which shape | molds the 2nd material which consists of resin by injection molding etc. was shown, when applying a metal as a 2nd material, it can shape | mold similarly by die-casting, metal powder injection molding, etc. it can. Furthermore, as an electronic device, a mobile phone, a camera, a portable music player, and the like have been shown as examples. However, the electronic device is not limited to these electronic devices. For example, a portable game machine, a portable communication device, a radio, Applicable to various electronic devices such as TVs, notebook computers, notebook word processors, video cameras, electronic notebooks, various infrared or wireless remote controllers, calculators, motors, breakers, switches, batteries, and automotive electronic control devices. It goes without saying that it is possible. Needless to say, it can be used for fixed electronic devices. In addition, there is no limitation on the shape and size of the electronic device, and the shape and size of the first member formed from the first material and the second member formed from the second material are also those shown above. It is not limited. Needless to say, the present invention is not limited to electronic devices, and any device that can use a housing can be used in the same manner as in the above embodiments.

It is the perspective view which showed the structure of the mobile telephone as an electronic device comprised with the housing | casing of Embodiment 1 of this invention. It is the fragmentary perspective view which expanded and showed the detail of the location in the round frame II formed from the 1st member and 2nd member of the housing | casing of the mobile telephone shown in FIG. It is sectional drawing which shows the manufacturing method in the location formed from the 1st member and 2nd member of the housing | casing shown in FIG. It is the perspective view which showed the structure of the camera as an electronic device comprised with the housing | casing of Embodiment 2 of this invention. FIG. 5 is an enlarged partial perspective view showing details of a portion in a round frame V formed from a first member and a second member of the housing of the camera shown in FIG. 4. It is sectional drawing which shows the manufacturing method in the location formed from the 1st member of the housing | casing shown in FIG. 4, and a 2nd member. It is the perspective view which showed the structure of the camera as an electronic device comprised with the housing | casing of Embodiment 3 of this invention. It is the fragmentary perspective view which expanded and showed the detail of the location in the round frame VIII formed from the 1st member of the housing | casing of the camera shown in FIG. 7, and a 2nd member. It is sectional drawing which shows the manufacturing method in the location formed from the 1st member and 2nd member of the housing | casing shown in FIG. It is the perspective view which showed the structure of the portable music player as an electronic device comprised with the housing | casing of Embodiment 4 of this invention. It is the fragmentary perspective view which expanded and showed the detail of the location in the round frame XI formed from the 1st member and 2nd member of the housing | casing of the portable music player shown in FIG. It is sectional drawing which shows the manufacturing method in the location formed from the 1st member and 2nd member of the housing | casing shown in FIG. It is the fragmentary perspective view which expanded and showed the detail of the other example of the location in the round frame XI formed from the 1st member of the housing | casing of the portable music player shown in FIG. 10, and a 2nd member. It is sectional drawing which shows the other example of the manufacturing method in the location formed from the 1st member of the housing | casing shown in FIG. 10, and a 2nd member. It is the perspective view which showed the structure of the portable music player as an electronic device comprised with the housing | casing of Embodiment 5 of this invention. FIG. 16 is a partial perspective view showing, in an enlarged manner, details of a portion in a round frame XVI formed from the first member and the second member of the casing of the portable music player shown in FIG. 15. It is sectional drawing which shows the manufacturing method in the location formed from the 1st member and 2nd member of the housing | casing shown in FIG.

Explanation of symbols

5, 25, 35, 43, 73 first member,
5a, 25a, 35a, 43a, 73a ends,
5b, 25b, 35b, 43b, 73b tip,
5c, 25c, 35c, 43c, 73c Bending start position,
6, 26, 36, 44, 74 second member, 11, 31, 51, 81, 331 mold,
14, 34, 54, 84, 334 cavity,
15, 215, 315, 515, 516, 815 filling start position,
35d, 55, 73d, 550 protrusion,
60, 260, 360, 440, 740 second material,
100, 101, 102, 103, 104 housing,
111, 211, 311, 411, 711 Bonding surface, 320 convex portion, W boundary position,
X single part, Y joint part, Z buried part.

Claims (9)

A first member formed of a first material having a first melting point; and a second member formed of a second material having a second melting point lower than the first melting point. In the manufacturing method of the housing having,
The end portion of the first member is bent and the end portion is embedded in the second member, and the first member and the second member are joined to each other only on one surface. Forming joints continuously,
The bending direction of the end of the first member is the joining direction with the second member at the joining location of the first member,
The casing is characterized in that the bending start position of the end portion of the first member is formed in the vicinity of the boundary position between the buried part and the joint part or in the vicinity of the boundary position between the buried part and the joint part. Manufacturing method. 2. The method for manufacturing a housing according to claim 1, wherein a single part formed only by the first member is formed continuously to the joining part. The casing according to claim 1, wherein a protrusion that protrudes in a direction opposite to a bending direction of the end of the first member is formed at an end of the first member. Manufacturing method. An end portion of the first member and a portion corresponding to the joining portion are inserted into a cavity of the mold, and the second material is filled into the cavity of the mold to enter the inside of the second member. In the manufacturing method of the housing according to any one of claims 1 to 3, wherein the end of the first member is buried.
A method for manufacturing a casing, wherein the bending start position of the end of the first member is brought into contact with the mold by a filling pressure of the second material into the cavity. The filling of the second material is performed so that the filling direction is the end direction of the first member from the joining side of the first member at the joining portion with the second member. The manufacturing method of the housing according to claim 3 or 4, characterized in that it is characterized. The casing according to any one of claims 1 to 5, wherein the first material is formed of a metal material, and the second material is formed of a resin material. Production method. In the metal mold | die used for the manufacturing method of the housing | casing of any one of Claim 1 thru | or 6,
A cavity for inserting a portion corresponding to the end portion of the first member and the joining portion;
The metal material is characterized in that the filling start position of the second material is formed on the joining side of the first member at the joining location with the second member. The mold is provided with a convex portion at a position opposite to the end portion from a bending start position of the end portion of the first member, and at a position facing the first member. The mold according to claim 7. The mold includes a protrusion that protrudes in a direction opposite to an end of the first member and in a direction opposite to a bending direction of the end of the first member. Item 9. The mold according to Item 7 or Item 8.

Images