JP2008019993A - Joint structure, casing, and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint structure comprising an engaging member having high appearance quality and an engaged member engaged and joined with the engaging member. <P>SOLUTION: The joint structure comprises the engaging member 11 and the engaged member 12 engaged and joined with the engaging member. The engaging member has a surface 11b formed at an acute angle to a first joint face 11a. A grooved portion 13 is formed on the first joint face with an inclined face 13a having the same angle as the acute angle. The engaged member has a surface 12b formed at an obtuse angle to a second joint face 12a. A protruded portion 14 fittable into the grooved portion is formed on the second joint face. Thus, a distance between the surface of the engaging member and the inside face on the outside of the grooved portion formed on the first joint face, namely the thickness of an outer wall forming the grooved portion, is constant in the direction of the depth of the grooved portion. When the engaging member is injection-molded, the surface corresponding to the grooved portion of the engaging member can be molded into a smooth condition with no shrinkage hole. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a joining structure that includes an engaging member and an engaged member that is engaged and joined to the engaging member, a housing in which the joining structure is used, and an electronic device that includes the housing. About.

  The exterior case of an electronic device is generally divided into an upper case and a lower case because it is necessary to dispose electronic components and the like inside. The upper case and the lower case are joined with their respective split surfaces joined together, but in order to increase the joining accuracy and facilitate the joining work, grooves are formed on the split surface of the upper case, Projections into which the grooves can be fitted are formed on the dividing surface. In such a configuration, for example, after an electronic component or the like is disposed in the lower case, the upper case is put on the lower case, and the protrusion of the lower case is fitted and engaged with the groove of the upper case. The split surface of and the split surface of the lower case are aligned and joined. Thereby, an upper case and a lower case can be engaged and joined with high precision and easily (refer patent document 1).

JP 2006-86220 A

  The outer case of an electronic device is usually manufactured by injection molding of plastic. For this reason, taking into account the removal of the injection mold or the like, the grooves formed on the dividing surface of the upper case and the protrusions formed on the dividing surface of the lower case are formed in a rectangular shape in cross section. Here, when the exterior case of the electronic device is formed in a rectangular parallelepiped shape, for example, the surface of the upper case with respect to the dividing surface and the surface of the lower case with respect to the dividing surface are substantially perpendicular. In this case, the distance between the surface of the upper case and the inner surface on the upper case surface side constituting the groove formed on the dividing surface of the upper case, that is, the thickness of the outer wall forming the groove is the depth of the groove. Constant in direction. Therefore, when the upper case is injection molded, the surface corresponding to the groove of the upper case is molded smoothly.

  However, from the viewpoint of the arrangement and appearance design of built-in electronic components, etc., the outer case of the electronic device may include an inclined surface, etc., and the surface of the upper case with respect to the dividing surface forms an obtuse angle, for example For example, the surface with respect to the divided surface forms an acute angle. In this case, the distance between the surface of the upper case and the inner surface on the upper case surface side constituting the groove formed on the dividing surface of the upper case, that is, the thickness of the outer wall forming the groove is the depth of the groove. Gradually change in direction, ie gradually thicken. Therefore, when the upper case is injection-molded, there may be a case where the surface corresponding to the groove of the upper case is attracted. When this shrinkage or the like occurs, the exterior case becomes defective in appearance, and the exterior case may be insufficient in strength, resulting in deterioration in appearance quality such as cracking or cracking.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a joint including an engaging member having high appearance quality and an engaged member that is engaged and joined to the engaging member. An object of the present invention is to provide a housing in which a structure and a joining structure thereof are used, and an electronic device including the housing.

  To achieve the above object, the joining structure of the present invention is a joining structure comprising an engaging member and an engaged member that is engaged and joined to the engaging member. Are formed so as to form an acute angle with respect to the first joint surface, and a groove portion having an inclined surface having the same angle as the acute angle is formed on the first joint surface, Is formed so as to form an obtuse angle with respect to the second joint surface, and a protrusion that can be fitted into the groove is formed on the second joint surface. Thereby, the distance between the surface of the engaging member and the inner surface of the outer side of the groove formed on the first joint surface of the engaging member, that is, the thickness of the outer wall forming the groove is the depth direction of the groove. Therefore, when the engaging member is injection-molded, the surface corresponding to the groove portion of the engaging member can be formed in a smooth state without being pulled.

  Moreover, the said protrusion is provided with the inclined surface which can contact | adhere with the inclined surface of the said groove part, It is characterized by the above-mentioned. Thereby, since the inclined surface of a groove part and the inclined surface of a protrusion can be used as the positioning reference surface, the positioning accuracy when the engaging member and the engaged member are engaged can be improved. Further, the groove portion is formed between a surface and an inner surface of the engaged member. Thereby, since both sides of the projection can be sandwiched and held by the groove, the engagement strength between the engagement member and the engaged member can be increased. The surface of the groove portion facing the inclined surface is formed as an obtuse angle surface including 90 ° with respect to the first bonding surface. Thereby, it is possible to smoothly perform die cutting when the engaging member is injection-molded.

  Moreover, the surface on the opposite side to the said inclined surface in the said protrusion is formed so that contact | adherence with the surface facing the said inclined surface in the said groove part is characterized. Thereby, since both the inner side surfaces of the groove part and both outer side surfaces of the protrusion can be used as positioning reference surfaces, the positioning accuracy when the engaging member and the engaged member are engaged can be further improved. . Furthermore, since both the outer side surfaces of the protrusion can be sandwiched and held by both inner side surfaces of the groove portion, the engagement strength between the engaging member and the engaged member can be further increased. The groove is formed on the inner surface side of the engaged member. Thereby, since the inner surface side of the groove portion is opened, the fitting operation of the protrusion can be performed smoothly. Further, the engaging member and the engaged member are a housing of the apparatus. And in order to achieve the said objective, the electronic device of this invention was provided with the said housing | casing. Thereby, it is possible to provide the housing | casing and electronic device which show said each effect.

  Embodiments of the present invention will be described with reference to the drawings. The embodiments described below do not limit the invention according to the claims, and all the combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. Absent.

  1A and 1B are cross-sectional views showing a joint structure according to an embodiment of the present invention and a conventional joint structure. As shown in FIG. 1A, the joining structure 10 of the present embodiment includes an engaging member 11 and an engaged member 12, and an engaging member joining surface (first joining) of the engaging member 11 is provided. The protrusion 14 formed on the engaged member joining surface (second joining surface) 12a of the engaged member 12 is engaged with the groove 13 formed on the surface 11a, and the engaging member joining surface 11a and The engaged member joining surface 12a is joined.

  The engaging member 11 is formed such that the engaging member surface 11b forms an acute angle θ1 with respect to the engaging member joining surface 11a. A groove 13 is formed in the engaging member joining surface 11 a of the engaging member 11. The groove 13 is formed as an inclined surface in which the inner surface 13a on the engagement member surface 11b side constituting the groove 13 forms the same angle as the acute angle θ1 with respect to the engagement member bonding surface 11a. Accordingly, the distance d1 between the engagement member surface 11b of the engagement member 11 and the inner side surface 13a of the groove portion 13, that is, the thickness d1 of the outer wall forming the groove portion 13 is constant in the depth direction of the groove portion 13. Therefore, when the engaging member 11 is injection-molded, the engaging member surface 11b corresponding to the groove portion 13 of the engaging member 11 can be formed into a smooth surface without being pulled. Further, since the groove portion 13 is formed between the engagement member surface 11b and the engagement member inner surface 11c of the engagement member 11, both sides of the protrusion 14 can be sandwiched and held. The engagement strength of the engaged member 12 can be increased. Moreover, since the groove part 13 is formed in the surface of the obtuse angle (theta) 11 containing 90 degrees with respect to the engagement member joint surface 11a, the inner surface 13b by the side of the engagement member inner surface 11c which comprises the groove part 13 is formed in an engagement member. It is possible to smoothly perform die-cutting when 11 is injection-molded.

  The engaged member 12 is formed such that the engaged member surface 12b forms an obtuse angle θ2 with respect to the engaged member joining surface 12a. A protrusion 14 is formed on the engaged member joining surface 12 a of the engaged member 12. The protruding portion 14 is formed as an inclined surface in which the outer surface 14a on the engaged member surface 12b side constituting the protruding portion 14 forms the same angle as the obtuse angle θ2 with respect to the engaged member joining surface 12a. . Therefore, when the protrusion 14 is fitted in the groove 13, the outer surface 14 a of the protrusion 14 is brought into close contact with the inner surface 13 a of the groove 13, and the positioning is performed when the engaging member 11 and the engaged member 12 are engaged. This positioning accuracy can be improved as a reference plane. Further, the outer surface 14b on the side of the engaged member inner surface 12c constituting the protrusion 14 is usually different from the inner surface 13b of the groove 13 so that the protrusion 14 can be smoothly fitted into the groove 13. The gap is opened. However, the fitting tolerance may be reduced so that the outer side surface 14b of the protrusion 14 and the inner side surface 13b of the groove 13 are in close contact with each other. By forming in this way, both the outer side surfaces 14a and 14b of the protrusion 14 and the both inner side surfaces 13a and 13b of the groove 13 can be used as positioning reference surfaces. The positioning accuracy when engaged can be further improved. Furthermore, since both the outer side surfaces 14a and 14b of the protrusion 14 can be sandwiched and held by both inner side surfaces 13a and 13b of the groove 13, the engagement strength between the engaging member 11 and the engaged member 12 is further increased. Can do.

  On the other hand, as shown in FIG. 1B, the conventional joining structure 20 includes an engaging member 21 and an engaged member 22, and is formed on the engaging member joining surface 21a of the engaging member 21. The groove portion 24 formed on the engaged member joining surface 22a of the engaged member 22 is engaged with the projected portion 23, and the engaging member joining surface 21a and the engaged member joining surface 22a are joined. . Thus, the conventional protrusion 23 and groove 24 are formed in the engaging member 21 and the engaged member 22, respectively, and the protrusion 14 and groove 13 of the present embodiment are engaged with the engaged member 12. In contrast to being formed on each of the joint members 11, the structure is reversed. This point will be described later.

  The engaging member 21 is formed such that the engaging member surface 21b forms the same acute angle θ1 as the joining structure 10 with respect to the engaging member joining surface 21a. A protrusion 23 is formed on the engagement member joining surface 21 a of the engagement member 21. As for this protrusion 23, the outer surface 23a by the side of the engagement member surface 21b which comprises the protrusion 23 is formed in the perpendicular | vertical surface of substantially 90 degrees with respect to the engagement member joining surface 21a. On the other hand, the engaged member 22 is formed such that the engaged member surface 22b forms the same obtuse angle θ2 as the bonded structure 10 with respect to the engaged member bonding surface 22a. A groove 24 is formed in the engaged member joining surface 22 a of the engaged member 22. In the groove portion 24, the inner side surface 24 a on the engaged member surface 22 b side forming the groove portion 24 is formed on a vertical surface of approximately 90 ° with respect to the engaged member joining surface 22 a. Accordingly, the protrusion 23 and the groove 24 of the joining structure 20 are formed so that the engaging member 21 and the engaged member 22 can be removed when the engaging member 21 and the engaged member 22 are injection-molded. Are formed respectively. The distance d2 between the engaged member surface 22b of the engaged member 22 and the inner side surface 24a of the groove 24, that is, the thickness d2 of the outer wall forming the groove 24 gradually increases in the depth direction of the groove 24. Become thicker. Therefore, when the engaged member 22 is injection-molded, the engaged member surface 22b corresponding to the groove portion 24 of the engaged member 22 is likely to be closed, resulting in poor appearance and insufficient engagement strength. There is a risk.

  FIG. 2 is a perspective view showing the entire external configuration of a recording apparatus that is an electronic apparatus to which the bonding structure according to the present embodiment is applied. This recording apparatus is an ink jet printer 100. For example, business cards, cards, L / 2L size, postcards, six-cut sheets, cut sheets of sizes from A6 size to A4 size of JIS standard, and CD-R (Compact), for example. It has a function capable of recording on a label surface of an optical disc such as a Disc-Recordable (DVD-R) or a DVD-R (Digital Versatile Disc-Recordable).

  The ink jet printer 100 is entirely covered with a substantially rectangular parallelepiped housing 101. The housing 101 is divided into upper and lower three stages of an upper housing 102, a middle housing 103 and a lower housing 104. The joining structure 150 (see FIG. 3 and the like) of this embodiment is applied to the middle housing (engaged member) 103 and the lower housing (engagement member) 104. The junction structure 150 will be described later. An operation unit 110 is disposed on the front surface of the upper housing 102 (hereinafter, “front surface” refers to the installation state shown in FIG. 1), and the memory card slot portion on the left side of the middle housing 103 is illustrated. 120 is disposed, and a sheet feeding unit 130 is disposed on the rear surface (hereinafter, “rear surface” refers to the installation state illustrated in FIG. 1) on the upper surface of the upper housing 102, and on the front surface side of the middle housing 103. Is provided with a paper discharge unit 140.

  The operation unit 110 includes a substantially rectangular operation panel 111, and a liquid crystal display panel 112 that displays an operation state or the like is mounted at a substantially central portion of the operation panel 111. The power is turned on on both sides of the liquid crystal display panel 112. A plurality of buttons 113 such as a power system for turning off, an operation system for operating a cueing of paper, an operation for flushing ink, and the like, a processing system for performing image processing, and the like are provided. Since the user can operate the various buttons 113 while checking the liquid crystal display panel 112 for confirmation, erroneous operation can be prevented.

  The memory card slot 120 is covered with a cover 121 that can be opened and closed in the direction of arrow a. The memory card slot section 120 is formed with a plurality of slots, and is configured to be compatible with a plurality of types of memory cards. Even if the user does not connect the ink jet printer 100 to a personal computer, the user simply inserts the memory card into the memory card slot 120 in a state of the ink jet printer 100 alone, and records an image or the like stored in the memory card. be able to.

  The paper feed unit 130 includes a paper support 132 having a function of opening and closing a paper feed port 131 that is opened upward in a rectangular shape and a function of supporting one or a plurality of papers to be fed. An automatic paper feed mechanism 133 that automatically feeds supported paper is provided. The paper support 132 is attached so as to be rotatable in the direction of the arrow b shown in the figure around the rotation axis at the rear end. When the user uses or does not use the ink jet printer 100, the user can put the finger on both sides of the paper support 132 and rotate the paper support 132 to open and close the paper feed port 131. In addition, it is possible to prevent dust from entering the paper feed slot 131.

  The paper discharge unit 140 includes a stacker 142 having a function of opening and closing a paper discharge port 141 that is opened in a rectangular shape toward the front and a function of stacking one or a plurality of discharged sheets, and a recorded sheet. A paper discharge mechanism 143 for discharging paper to the stacker 142 and a disk transport mechanism (not shown) are provided. The stacker 142 is attached so as to be rotatable in the direction of the arrow c in the figure around the rotation shaft at the lower end. When the user uses or does not use the ink jet printer 100, the user can place the finger on the top of the stacker 142 and rotate the stacker 142 to open and close the paper discharge outlet 141. In addition, it is possible to prevent dust from entering the discharge port 141. Further, since the recorded paper is always discharged from the front side, the user can easily take out the paper.

  3A and 3B are exploded perspective views of the middle housing 103 and the lower housing 104, and FIGS. 4A and 4B are dashed-dotted lines shown in FIGS. 3A and 3B. It is an expansion perspective view of the junction structure 150 of the enclosed parts a and b. This joining structure 150 is formed only on portions (surfaces a and b surrounded by an alternate long and short dash line shown in FIG. 3) that are inclined in appearance when the middle housing 103 and the lower housing 104 are joined. Yes. In the joining structure 150, a protrusion 152 formed on the middle housing joint surface 103a of the middle housing 103 is engaged with a groove portion 151 formed on the lower housing joint surface (first joint surface) 104a of the lower housing 104. The lower housing joint surface 104a and the middle housing joint surface (second joint surface) 103a are joined.

  The middle housing 103 is formed such that the middle housing surface 103b forms an obtuse angle with respect to the middle housing joint surface 103a. A protrusion 152 is formed on the middle housing joint surface 103 a of the middle housing 103. The protrusion 152 is formed such that the outer surface 152a on the middle housing surface 103b side forming the protrusion 152 is an inclined surface that forms the same angle as the obtuse angle with respect to the middle housing joint surface 103a. Therefore, when the protrusion 152 is fitted into the groove 151, the outer surface 152a of the protrusion 152 is brought into close contact with the inner surface 151a of the groove 151 on the lower housing surface 104b side, and the middle housing 103 and the lower housing 104 are engaged. The positioning accuracy can be improved as a positioning reference surface.

  The lower housing 104 is formed such that the lower housing surface 104b forms an acute angle with respect to the lower housing joint surface 104a. A groove 151 is formed on the lower housing joint surface 104 a of the lower housing 104. The groove 151 is formed such that the inner surface 151a on the lower housing surface 104b side constituting the groove 151 is an inclined surface having the same angle as the acute angle with respect to the lower housing joint surface 104a. Therefore, the distance between the lower housing surface 104b of the lower housing 104 and the inner surface 151a of the groove 151, that is, the thickness of the outer wall forming the groove 151 is constant in the depth direction of the groove 151. Therefore, when the lower housing 104 is injection-molded, the lower housing surface 104b corresponding to the groove portion 151 of the lower housing 104 can be molded into a smooth surface without being pulled. The groove 151 is formed on the inner surface 104 c side of the lower housing 104, and the protrusion 152 is formed on the inner surface 103 c side of the middle housing 103. Therefore, since the inner surface side of the groove 151 is open, the fitting operation of the protrusion 152 can be performed smoothly. Further, the groove 151 may be formed between the surface 104a and the inner surface 104c of the lower housing 104, and the protrusion 152 may be formed between the surface 103a and the inner surface 103c of the middle housing 103.

  If it is joining of members, it can apply similarly to all members irrespective of the kind of member. Further, any recording apparatus including a housing having a joint structure can be applied to, for example, a facsimile machine, a copying apparatus, a scanner, and the like. Further, the present invention is not limited to a recording device, and can be applied to a general electronic device including a housing having a joint structure.

It is sectional drawing which shows the junction structure which concerns on one embodiment of this invention, and the conventional junction structure. 1 is a perspective view illustrating an overall appearance configuration of a recording apparatus that is an electronic apparatus to which a bonding structure according to an embodiment is applied. FIG. 2 is an exploded perspective view of a middle housing and a lower housing of the recording apparatus of FIG. 1. It is an expansion perspective view of the junction structure of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Joining structure, 11 Engagement member, 11a Engagement member joining surface, 11b Engagement member surface, 11c Engagement member inner surface, 12 Engagement member, 12a Engagement member joining surface, 12b Engagement member surface, 12c Engaged member inner surface, 13 groove, 13a, 13b inner side, 14 protrusion, 14a, 14b outer side, 100 inkjet printer, 101 housing, 103 middle housing, 103a middle housing joint surface, 103b middle housing surface, 104 lower Housing, 104a Lower housing joint surface, 104b Lower housing surface, 110 Operation part, 120 Memory card slot part, 130 Paper feed part, 140 Paper discharge part, 150 Joining structure, 151 Groove part, 151a Inner side face, 152 Projection part, 152a Outside side

Claims (9)

A joining structure including an engaging member and an engaged member to be engaged and joined to the engaging member,
The engaging member is formed so that the surface forms an acute angle with respect to the first joint surface, and a groove portion having an inclined surface having the same angle as the acute angle is formed on the first joint surface,
The engaged member is formed so that a surface thereof forms an obtuse angle with respect to the second joint surface, and a protrusion that can be fitted into the groove is formed on the second joint surface. Junction structure. The joint structure according to claim 1, wherein the protrusion includes an inclined surface that can be in close contact with the inclined surface of the groove. The joining structure according to claim 1, wherein the groove is formed between a surface and an inner surface of the engaged member. The surface facing the said inclined surface in the said groove part is formed in the surface of the obtuse angle containing 90 degrees with respect to the said 1st joining surface, The Claim 1 characterized by the above-mentioned. Joining structure. The surface on the opposite side to the said inclined surface in the said protrusion is formed so that contact | adherence with the surface facing the said inclined surface in the said groove part is possible, The Claim 1 characterized by the above-mentioned. Joining structure. The joint structure according to claim 1, wherein the groove is formed on an inner surface side of the engaged member. The joining structure according to claim 1, wherein the engaging member and the engaged member are a housing of an apparatus. The joining structure according to any one of claims 1 to 6 is used for at least a part of the housing engaging portion. An electronic apparatus comprising the housing according to claim 8.

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