JP2008305929A - Housing of compact electronic equipment and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain the improvement of stiffness and strength of a housing, while making the manufacture of the housing easy, withholding the cost as low as possible. <P>SOLUTION: Stainless spring steel plate is adopted as the material of a housing 1, an outer shaped body 2 formed into a predetermined outer shape of the housing 1 with the stainless spring steel plate, and an inner shaped body 3 formed in to a predetermined inner shape of the housing 1 with the stainless spring steel plate are laminated mutually so as to be closely attached state. By the two laminated structure of the shaped bodies 2, 3, whole of the housing 1 is formed to be thin and compact being made to have toughness. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a casing of a small electronic device such as a mobile phone or other portable information terminal, a digital camera or other portable video device, a digital audio player, a portable radio or other portable acoustic device, and a manufacturing method thereof.

  In recent years, various electronic components have been reduced in size, and the housing has been made thinner and smaller, so that various types of devices such as cellular phones and other portable information terminals, digital cameras and other portable video devices, digital audio players, portable radios and other portable acoustic devices have been developed. Electronic devices are rapidly becoming smaller and thinner. By the way, many of the casings of such small electronic devices are resin-molded products, and while there are concerns about a decrease in rigidity and strength while reducing the thickness and size, the casing is made thinner and smaller. However, there is a demand for materials and structures that do not reduce rigidity and strength.

This type of housing is proposed in Patent Document 1 and the like. In this literature 1, the rigidity and strength of the casing are increased by using a reinforced resin material filled with glass fiber or carbon fiber as the casing material. In addition, there is a resin material in which a steel plate is inserted.
Japanese Patent Application Laid-Open No. 7-60777

  However, in order to increase the rigidity and strength of the housing, the method of filling the resin material with glass fiber or carbon fiber or inserting a steel plate takes a lot of labor to make the housing, and the yield is poor. There is a problem that the cost increases.

  The present invention solves such a conventional problem, and in the case of this type of small electronic device and the manufacturing method thereof, while facilitating the manufacture of the case and keeping the cost as low as possible, The object is to improve the rigidity and strength of the housing.

  In order to achieve the above object, the housing of the small electronic device according to the present invention is a thin electronic device housing that is formed thin and small with various materials. An external shape body formed in a predetermined external shape of the housing by a spring steel plate and an internal shape body formed in a predetermined internal shape of the housing by the spring steel plate, the external shape body and the internal shape body are provided The gist is that they are laminated in close contact with each other to give toughness. In this case, a plurality of internal shape bodies may be provided, and these internal shape bodies may be stacked in close contact with each other. Further, a frame-shaped body that forms the outer periphery of the housing may be provided, and an outer-shaped body and an inner-shaped body may be stacked and assembled inside the frame-shaped body. In any case, each part can be laminated in a close contact state by crimping the external shape body and the internal shape body or the internal shape bodies to each other's contact surfaces via an adhesive means.

  Further, the manufacturing method of the casing of the small electronic device according to the present invention is a manufacturing method of the casing of the small electronic device that is formed thin and small by various materials. Forming an external shape body having a predetermined external shape and an internal shape body having a predetermined internal shape from a steel sheet, respectively, and laminating these external shape body and internal shape body in close contact with each other And

  According to the case of the small electronic device and the method of manufacturing the same of the present invention, it is possible to make the case easy and improve the rigidity and strength of the case while keeping the cost as low as possible.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a part of a casing of a cellular phone as an example of a casing of a small electronic device. The casing 1 is made of a stainless spring steel plate (hereinafter simply referred to as a spring steel plate) as a material, and has an outer shape body 2 made of a spring steel plate, an inner shape body 3 made of a spring steel plate, and a frame made of a synthetic resin material. The shape body 4 is formed and these are laminated in a sandwich structure, and the whole has toughness and is formed thin and small. Hereinafter, each part is explained in full detail.

  The external shape body 2 forms the external shape of the housing 1, and is formed into a thin and small predetermined external shape by a spring steel plate as shown in FIG. In this case, the external shape body 2 is formed in a substantially rectangular planar shape 21, a plurality of holes 20 are formed in a part of the planar surface, and the outer peripheral edge portion is slightly raised (rise 22). It has become. In the case of the external shape body 2, an adhesive 5 is applied on the inner surface in accordance with the contact surface shape of the internal shape body 3 with respect to the external shape body 2, and a protective sheet for protecting the adhesive 5 on the adhesive 5. (Release paper) 6 is affixed so that an inner shape body 3 (to be described later) is adhered to and laminated on the inner side surface so as to facilitate the processing operation. The internal shape body 3 forms the internal shape of the housing 1, and is formed by a spring steel plate into a thin and small predetermined internal shape as shown in FIG. In this case, the internal shape body 3 is formed into a substantially rectangular planar shape 31 that can be superposed on the inner plane of the external shape body 2, and an electronic component (not shown) mounted inside the housing 1 is formed on the plane. The predetermined shape 30 is cut out in accordance with the layout of (), and the outer peripheral edge portion has a shape (rise 32) slightly raised so as to be able to contact along the inner side of the outer peripheral edge portion 22 of the outer shape body 2. Is provided. The frame-shaped body 4 forms a part of the outer peripheral shape of the housing 1 and is formed of a synthetic resin material into a thin, small, substantially rectangular frame shape as shown in FIG. In this case, the inner peripheral edge 41 of the frame-shaped body 4 is also formed with locking means (not shown) that can be engaged with the outer peripheral edge (rise 32) of the internal shaped body 3. The external shape body 2, the internal shape body 3, and the frame shape body 4 are formed in this way, and the casing 1 is bonded to the mutual contact surface of the casing 1 with the adhesive 5 through the adhesive 5. The outer shape body 2 and the inner shape body 3 are laminated and assembled in close contact with each other inside the frame shape body 4, and by this sandwich structure, the entire structure is tough and thin and small.

  In the case of the housing 1, an external shape body 2 having a predetermined external shape and an internal shape body 3 having a predetermined internal shape are formed (each separately) from the spring steel plate. And the internal shape body 3 are manufactured by a method of laminating the surfaces in close contact with each other. For production of the housing 1, it is optimal to use press working. First, an external shape plane part having a predetermined plane shape for making a predetermined external shape of the housing 1 from a spring steel plate by punching with a press machine (in this case, the plane part before the outer peripheral edge is raised) ). Similarly, an internal shape plane part having a predetermined plane shape for producing a predetermined internal shape of the housing 1 (in this case, a plane part before the outer peripheral edge is raised) is punched out. Subsequently, the press machine is bent into a predetermined external shape, such as bending a predetermined position from the external shape plane part to make a rising 22 at the outer peripheral edge. Similarly, a predetermined position is bent from the internal shape plane part to form a rising 32 at the outer peripheral edge portion and processed into a predetermined internal shape. Subsequently, the adhesive 5 is applied to the inner surface of the outer shape body 2 in accordance with the contact surface shape of the inner shape body 3 with the outer shape body 2. The adhesive 5 may use a double-sided adhesive seal, a heated adhesive sheet, or the like. On the other hand, since the frame-shaped body 4 is a resin molded product, the frame-shaped body 4 (in this case, a substantially rectangular frame shape) is formed by a synthetic resin material in a separate process from the external shape body 2 and the internal shape body 3. Form. Subsequently, the external shape body 2 and the internal shape body 3 are pressure-bonded to the mutual contact surfaces via the adhesive 5 by a press machine, and the external shape body 2 and the internal shape body 3 are stacked in close contact with each other. . In addition, when using a heat-bonding sheet for the adhesive 5, the outer shape body 2 and the inner shape body 3 are pressure-bonded while being heated. Then, the laminated structure of the outer shape body 2 and the inner shape body 3 is assembled inside the frame shape body 4.

  The casing 1 formed in this manner is a spring steel plate in which the outer shape body 2 and the inner shape body 3 are thin and small, but these are pressure-bonded to each other through an adhesive 5 so as to be in close contact with each other. By being laminated in a state, the casing 1 has sufficient toughness, and its rigidity and strength are doubled. Although it is a thin and small casing 1, its rigidity and strength are extremely high compared to conventional products. It will be a thing.

  As described above, in the housing 1, a spring steel plate is adopted as the material of the housing 1, and the external shape body 2 of the housing 1 formed by the spring steel plate and the inside of the housing 1 formed by the spring steel plate. Due to the laminated structure of the two shape bodies 2 and 3 in which the shape body 3 is laminated in close contact with each other, the entire case 1 is made thin and small with toughness. Thus, the rigidity and strength of the housing 1 can be highly enhanced while keeping the cost as low as possible.

  In the above embodiment, the frame-shaped body 4 that forms a part of the outer peripheral shape is provided in the housing 1. However, the frame-shaped body 4 has an arbitrary configuration and may be omitted. The frame-shaped body 4 may be a resin molded product or a metal processed product (including a spring steel plate).

  Moreover, in the said embodiment, although the housing | casing 1 is comprised with the single external shape body 2 and the single internal shape body 3, you may comprise the internal shape body 3 with a some internal shape body. In this case, similarly to the laminated structure of the external shape body 2 and the internal shape body 3, a plurality of internal shape bodies may be laminated in close contact with each other through an adhesive. The laminated structure of the internal shape body can easily cope with the rigidity and strength of the casing required by the user.

  Furthermore, in the above embodiment, the case of a mobile phone is illustrated as the case of a small electronic device. However, not only the mobile phone but also other portable information terminals, digital cameras and other portable video devices, digital audio Needless to say, the configuration of the present invention can also be applied to a casing of a player, a portable radio, or other portable audio equipment, and the same operations and effects can be achieved.

The top view which shows the structure of the housing | casing of the small electronic device (cellular phone) in one embodiment of this invention A plan view of the external shape body constituting the housing Plan view of the internal shape body constituting the housing Plan view of a frame-shaped body that forms part of the outer periphery of the housing

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 2 External shape body 20 Hole 21 Planar shape 22 Outer peripheral edge part 3 Internal shape body 30 Predetermined shape 31 Planar shape 32 Outer peripheral edge part 4 Frame shape body 41 Inner peripheral edge part 5 Adhesive 6 Protection sheet (release paper)

Claims (5)

In the case of small electronic devices that are made thin and small with various materials,
Spring steel plate is adopted as the material of the housing,
An external shape body formed in a predetermined external shape of the housing by the spring steel plate, and an internal shape body formed in a predetermined internal shape of the housing by the spring steel plate,
A casing of a small electronic device, wherein the outer shape body and the inner shape body are laminated in close contact with each other to give toughness.   The housing for a small electronic device according to claim 1, comprising a plurality of internal shape bodies, wherein the internal shape bodies are stacked in close contact with each other.   The housing for a small electronic device according to claim 1, further comprising a frame-shaped body that forms an outer periphery of the housing, wherein an outer-shaped body and an inner-shaped body are stacked and assembled inside the frame-shaped body.   The case of a small electronic device according to any one of claims 1 to 3, wherein the outer shape body and the inner shape body, or the inner shape bodies are pressure-bonded to each other's contact surface via an adhesive means. In a manufacturing method of a casing of a small electronic device that is formed thin and small with various materials,
Adopting spring steel plate as the material of the housing,
From the spring steel plate, an external shape body having a predetermined external shape of the casing and an internal shape body having a predetermined internal shape are formed, respectively.
A method for manufacturing a casing of a small electronic device, wherein the outer shape body and the inner shape body are stacked in close contact with each other.

Images