JP2009278040A - Assembly structure of electronic equipment and assembling method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To close through-holes formed on a case formed with an extrusion member without deteriorating appearance thereof. <P>SOLUTION: The case 10 is formed by cutting a metal extruded shape having a hollow portion continuous to an extrusion direction into a predetermined length. In the case 10, through-holes 21, 22 for passing a strap are formed on one side surface in the direction crossing the extrusion direction. A top plate 26 and a bottom plate 29 are press-fitted to the hollow open portions of the case 10. An insertion part 31 is attached in parallel with the extrusion direction between the top plate 26 and the bottom plate 29. The bottoms of the through-holes 21, 22 are closed with a concave portion 50 of the insertion part 31. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a structure and method for assembling a small electronic device using a casing made by cutting a metal extruded profile having a hollow cross section into a predetermined length.

  2. Description of the Related Art Conventionally, many portable electronic devices such as compact cameras have a casing made of a resin exterior part, for example, a combination of front and rear covers. However, the case made of a combination of a plurality of parts has the disadvantages that the strength is weak and the dimensional accuracy is lowered. Therefore, conventionally, it is known to cut the extruded profile having a hollow cross section into a predetermined length to make a casing (Patent Documents 1 and 2).

In the housing apparatus described in Patent Literature 1, a extruded body having a hollow cross-section is cut into a predetermined length to form a housing, and a component group is attached to at least one surface of the housing from the outside. In the small electronic housing and its manufacturing method described in Patent Document 2, an aluminum alloy extruded shape having a hollow cross-section is cut into a predetermined length to form a housing, and a hole or notch for mounting a part on the housing Is formed by press punching.
JP 11-112160 A JP 2006-185969 A

  By the way, a portable electronic device is generally provided with a strap attachment. The strap mounting portion is generally configured by connecting a pair of holes in a tunnel shape. The strap is attached to a support portion formed between the pair of holes. The pair of holes are small enough to pass through the strap, and are small in size, and the pair of holes need only be tied to the strap so that the pair is narrow and narrow. When forming such a strap attachment part on one side in a direction intersecting the extrusion direction of the housing, using the press punching described in Patent Document 2, the size of the hole is small, Disadvantages that the inner peripheral surface of the hole, that is, the sheared cut surface, has a noticeable fracture surface and sagging and the skin becomes rough, or the gap between the pair of holes is narrow, leading to deformation such as deformation of the hole. There is.

  In press punching, a punch die made of a cemented carbide (tungsten carbide (WC)) is generally used. Pressing aluminum and aluminum alloy housings using a cemented carbide punch and die causes aluminum adhesion and adhesive wear. It is considerably low compared. Although some ceramic punches and dies have been studied, the current situation is that they are not common due to insufficient strength.

  Furthermore, after the pair of through holes are formed in one side surface of the housing, the strap cannot be passed unless the pair of through holes are connected in a tunnel shape. In the housing apparatus described in Patent Document 1, a component group is attached to the housing from the outside. When a part that closes the pair of through holes in a tunnel shape is attached to the inside of the housing, a fastening member such as a screw or a blindfold member for hiding it appears on the appearance. For this reason, there exists a fault that it looks bad.

  An object of the present invention is to provide an electronic device assembly structure and an assembly method capable of closing a through-hole formed in a casing obtained by cutting an extruded profile having a hollow cross-section into a predetermined length without impairing the appearance. It is in.

  In the present invention, a casing made by cutting a metal extruded profile whose hollow portion is continuous in the extrusion direction into a predetermined length; and a through-hole formed in one side surface of the casing parallel to the extrusion direction And a through part having a part attached to the inside of the housing in parallel to the extrusion direction and closing the through hole from the inside.

  The threading part has a part that closes the through hole, and is attached to the inside of the housing in parallel to the extrusion direction. The opening in the extrusion direction of the housing is closed by external parts such as a top plate and a bottom plate. It is preferable that one end or both ends of the threaded parts are fastened together by a fixing means for fixing the external parts to the housing, because the mounting operation is simple.

  The through hole formed in the housing may be a hole for a speaker, a pair of holes for passing a strap, a hole for exposing a terminal, or the like. In the case of a pair of holes for the strap, it is desirable to form a recess for securing a space for passing the strap in a part of the threading part.

  In the present invention, since the through hole is closed by a part of the threaded part attached in parallel to the extrusion direction inside the housing, the through hole can be closed without impairing the appearance. Further, in the invention in which the threading parts are fastened together with the fixing means for the appearance parts, the appearance parts attached in the extrusion direction and the threading parts attached in the direction intersecting with the exterior parts can be fixed by the common fixing means. The number of parts can be reduced.

  As shown in FIG. 1, a housing 10 for a small electronic camera, which is an embodiment of the present invention, is made by cutting a metal extruded profile having hollow cross sections 11 and 12 into a predetermined length. The housing 10 is a hexahedron with the surface on which the photographic lens is exposed as the front surface 13, and the planar projection contour has a substantially elliptical shape (race track shape) with a large-diameter curved surface on the left. The housing 10 is used in a posture in which the hollow cross-sections 11 and 12 become the flat surface 25 and the bottom surface 23. Openings 14 and 15 are provided in the flat surface 25 and the bottom surface 23, respectively. The hollow portion between the openings 14 and 15 has substantially the same shape as the hollow cross-sections 11 and 12. On the front surface 13 parallel to the extrusion direction, a large-diameter opening 16 for exposing the lens barrel including the photographing lens, a horizontally long rectangular opening 17 for exposing the strobe light emitting window, and the like are formed by cutting.

  As shown in FIG. 2, a rectangular opening 19 for exposing the LCD display portion and the like are formed on the back surface 18 parallel to the extrusion direction by cutting. In addition, a pair of through holes 21 and 22 that are attachment portions for straps are formed on the left side surface 20 parallel to the extrusion direction by cutting. Although not shown, a stepped portion that is recessed by one step on the periphery of the opening 15 is formed on the bottom surface 23 by cutting. A screw hole for fixing the bottom plate is formed in the stepped portion.

  As shown in FIG. 3, a stepped portion that is recessed by one step on the periphery of the opening 14 is formed on the plane 25 of the housing 10 by cutting. A top plate 26 is fitted into the stepped portion and temporarily fixed by claw engagement. A shutter button 27 and a power switch 28 are incorporated in the top plate 26 in advance. A bottom plate 29 is fixed to the opening 15 of the bottom surface 23 by screws (fixing means) 41.

  A threaded part 31 that is passed between the top plate 26 and the bottom plate 29 in parallel with the extrusion direction is attached to the inside of the housing 10. The threading part 31 is formed of a material having elasticity into a plate shape having an L-shaped cross section. The threading part 31 is provided with a recess (part) 50 that closes the pair of through holes 21 and 22 from the inside.

  As shown in FIG. 4, the long piece 32 of the L-shaped cross section of the threading part 31 has a tip 33 bent into a “<” shape, and a first screw hole 34 is formed therebelow. Yes. The top plate 26 is integrally formed with a clip portion 35 with the open side facing downward. The clip part 35 holds the tip 33 of the threading part 31. Further, a fixing plate 37 is integrally formed on the top plate 26 next to the clip portion 35. A screw hole 38 for fixing to the housing 10 is formed in the fixing plate 37. A screw hole 40 is formed on the left side surface 20 of the housing 10 at the upper side. The screw 41 is tightened into the screw hole 38 of the fixing plate 37 and the first screw hole 34 of the threaded part 31 through the screw hole 40. Thereby, the tip 33 of the threading part 31 is fastened together with the screw 41 that fixes the top plate 26 to the housing 10.

  The other end 44 of the threading part 31 extends to the bottom plate 29 as shown in FIG. The short side portion 45 is bent so as to overlap the inside of the bottom plate 29. Second and third screw holes 46 and 47 are formed in the other end 44 and the short side portion 45, respectively. The screw 41 is tightened into the second screw hole 46 through a screw hole 48 provided below the left side surface of the housing 10. Further, the screw 41 is tightened into the third screw hole 47 through a screw hole 49 provided in the bottom plate 29.

  As shown in FIG. 6, the long side portion 32 of the threading part 31 is formed with a concave portion 50 that is bent in one step toward the inside at portions corresponding to the pair of through holes 21 and 22. The recessed part 50 has the effect | action which plugs up a pair of through-holes 21 and 22, and the effect | action which ensures the space for letting a strap pass. And the space | interval A between the bending in the both ends of the recessed part 50 is a space | interval narrower than the space | interval B between the outer ends of a pair of through-holes 21 and 22 so that it may not catch when passing a strap.

  As shown in FIG. 7, a pair of guide ribs 55 and 56 are formed integrally with the housing 10 along the extrusion direction on the inner wall of the left side surface of the housing 10. The pair of guide ribs 55 and 56 are formed together when making the extruded profile. These guide ribs 55 and 56 are formed with a width for guiding both ends of the threading part 31, and claws 57 and 58 for preventing the threading part 31 from coming out are formed at the tips. As shown in FIG. 8, the height of the pair of guide ribs 55 and 56 up to the claws 57 and 58 is a height that takes into account the recess of the recess 50.

  The operation of the above configuration will be briefly described. The housing 10 is made through an extrusion molding process, a cutting process, and a cutting process. In the extrusion process, an extruded shape having a hollow section in a lane track shape, for example, is made of a metal material. In the cutting step, the extruded profile is cut into a predetermined length. The extruded profile cut to a predetermined length is cut in a cutting process. In this cutting process, holes 16, 17 and 19 for assembling parts and a pair of through holes 21 and 22 for straps, stepped portions, screw holes, screw holes and the like are made. If necessary, a straightening step may be provided after the extrusion molding step, and the bending of the extruded profile may be straightened in the straightening step. Moreover, you may perform a cutting process after a cutting process. In this case, the cutting process may be performed continuously for each predetermined interval (length in the height direction of the casing) of the extruded profile.

  The completed housing 10 is supplied to the camera assembly process. In the assembly process, the top plate 26 is inserted into the opening 14 of the flat surface 25 of the housing 10. By this insertion, the top plate 26 is claw-coupled to the housing 10.

  Through the opening 15 of the bottom surface 23, the threaded part 31 is inserted in parallel with the extrusion direction into the housing 10 on which the top plate 26 is temporarily fixed. At this time, since the pair of guide ribs 55 and 56 guide both ends of the threading part 31 in the width direction, the insertion work can be easily performed. As the threading part 31 is inserted, the tip 33 is sandwiched between the clip portions 35 of the top plate 26 and further insertion is prevented. As a result, it can be seen that the insertion amount of the threading part 31 has become a prescribed amount. Thereafter, the screw 41 is tightened through the screw hole 40 on the left side surface 20 of the housing 10. Thereby, the top plate 26 and the tip 33 of the threading part 31 are simultaneously fixed to the housing 10.

  Built-in components such as a lens unit including a lens barrel portion incorporating a photographing lens, a strobe light emitting portion, and a battery compartment are incorporated into the housing 10 incorporating the threading component 31 through the openings 14 and 15 or the opening 19 for the display portion. It is. At this time, the connector is connected.

  A bottom plate 29 is inserted into the housing 10 incorporating the built-in components, and the bottom plate 29 is fixed to the housing 10 with screws 41. A screw 41 is tightened in the screw hole 48 below the left side surface 20 of the housing 10. As a result, the other end 44 of the threading part 31 and the housing 10 are fixed, the short side 45 of the threading part 31 and the bottom plate 29 are fixed, and the bottom plate 29 and the housing 10 are fixed. Although not shown, the bottom plate 29 is provided with a battery lid that can be opened and closed.

  As shown in FIGS. 6 and 8, the camera strap attachment portion that has been assembled constitutes the recess 50 of the threaded part 31 that forms the bottom of the pair of through holes 21 and 22 and the left and right walls of the recess 50. A pair of guide ribs 55 and 56 form a tunnel between the pair of through holes 21 and 22.

  In the above embodiment, the strap through-holes 21 and 22 are closed by the component 31, but the strap is not limited to the strap through-hole, and the bottom of the through-hole having other functions is closed. Also good. Moreover, although the through holes 21 and 22 for straps are provided on the left side surface, any of the front surface, the right side surface, and the back surface may be used as long as the surface is parallel to the extrusion direction. Furthermore, the through hole is not limited to the strap, and may be a through hole having other functions. In this case, it is not necessary to form a recess in the threaded part, and the bottom of the through hole may be closed with a simple flat part.

  In the above embodiment, an electronic camera has been described. However, the present invention is not limited to this, and the present invention can also be applied to an electronic device such as an information terminal or a mobile phone.

It is a front side perspective view which shows the housing of an electronic camera. It is a back side perspective view which shows the housing of an electronic camera. It is a disassembled perspective view which shows the structure of the exterior cover of an electronic camera. It is a longitudinal cross-sectional view which shows the fixing | fixed part of the front-end | tip of a threading part, and a top plate. It is a longitudinal cross-sectional view which shows the fixing | fixed part of the other end and bottom plate of a threading part. It is a longitudinal cross-sectional view which shows the positional relationship of the through-hole for straps, and a recessed part. It is a cross-sectional view showing the positional relationship between the tip of the threading part and the guide rib. It is a cross-sectional view which shows the positional relationship of the recessed part of a threaded part, and a guide rib.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Housing 11,12 Hollow cross-section part 21,22 Through-hole 26 Top plate 31 Through part

Claims (5)

A casing made by cutting a metal extruded profile whose hollow portion is continuous in the extrusion direction into a predetermined length;
A through hole formed on one side surface of the casing parallel to the extrusion direction;
A through part that has a part that closes the through hole from the inside and is attached to the inside of the housing in parallel to the extrusion direction;
An electronic device assembly structure characterized by comprising:   2. The through hole is a pair of holes for passing a strap, and a part of the through part is a recess for securing a gap between the pair of holes. Assembly structure of electronic equipment.   The exterior part which closes the opening part in the extrusion direction of the case is provided, and the threading part has one end or both ends sandwiching the part being fastened together by fixing means for fixing the appearance part to the case. The electronic device assembly structure according to claim 1, wherein the electronic device assembly structure is an electronic device assembly structure. A cutting step in which a hollow extruded portion made of metal having a continuous continuous extrusion direction is cut into a predetermined length to form a casing;
A drilling step of forming a through hole in one side surface parallel to the extrusion direction of the casing;
An assembly method for an electronic device, comprising: an attachment step of attaching a component through the inside of the housing in parallel with the extrusion direction and closing the through hole from the inside. The attaching step includes
The fixing device for fixing an external part that closes an opening in the extrusion direction of the casing to the casing, and including a step of fastening one end or both ends sandwiching the part of the threaded part together. 5. An electronic device assembling method according to 4.

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