JP2017143224A - Housing structure of electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a housing structure of an electronic apparatus in which assemblability and assembly accuracy of a pair of housing members are good.SOLUTION: A first fitting part 31 is formed at one end, and a second fitting part 32 is formed at the other end, respectively, in housing members 23, 24. The first fitting part 31 has a recess 31A. The recess 31A has an outer tongue piece 41 and an inner tongue piece 42, and has a C-shaped cross section. The second fitting part 32 is inserted into the recess 31A, and fitted to the first fitting part 31. A second bend 34 is formed at the tip of the second fitting part 32, having J-shaped cross section. A hole 36 for screwing a coupling screw 22 is formed by fitting the first and second fitting parts 31, 32. The hole 36 is defined by inner wall surfaces in four directions of X-axis direction and Y-axis direction.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a housing structure of an electronic device.

  2. Description of the Related Art A housing structure of an electronic device is known in which a pair of housing members are combined to form a cylindrical housing body (see, for example, Non-Patent Document 1). In the case structure described in Non-Patent Document 1, as shown in FIGS. 9 and 10, a pair of case members 61 and 62 are combined to form a cylindrical case body 60. The housing body 60 has an outer peripheral wall that constitutes an upper surface 60A, a lower surface 60B, a side surface 60C, and a side surface 60D. The pair of housing members 61 and 62 are formed by dividing the outer peripheral wall of the housing body 60 along two dividing lines L1 and L2 extending in a direction orthogonal to the circumferential direction. The dividing lines L1 and L2 are formed on the side surfaces 60C and 60D, for example. Each casing member 61, 62 has an end formed corresponding to each of the two dividing lines L1, L2.

  The casing members 61 and 62 are formed of, for example, a metal plate, and are coupled by fastening the coupling screw 65 with their ends facing each other.

  L-shaped L-shaped hooks 63 and 64 are formed at the end portions of the pair of casing members 61 and 62 as fitting portions for fitting the end portions to each other. The L-shaped hooks 63 and 64 are fitted so that the bent portions 63A and 64A at the tip face each other.

  As shown in FIG. 10, the bent portions 63 </ b> A and 64 </ b> A face each other in the direction in which the end portions of the casing members 61 and 62 are abutted (X-axis direction) in the fitted state. The inner wall surfaces 63B, 64B facing each other define a hole 66 into which the coupling screw 65 is screwed. When the coupling screw 65 is screwed into the hole 66, the force of the coupling screw 65 acts in the direction of separating the inner wall surfaces 63B and 64B in the X-axis direction by contact with the outer periphery of the coupling screw 65. Accordingly, the base end portions of the L-shaped hooks 63 and 64 and the bent portions 63A and 64A are pressed against each other, and the housing members 61 and 62 are fastened.

“Takachi Case, Box and Rack General Catalog”, Takachi Electric Industry Co., Ltd., September 2014, p. 546-549, <URL: http://www.takachi-el.co.jp/data/actibook/2014japanese/_SWF_Window.html> (Search date: February 4, 2016)

  However, the conventional case structure described in Non-Patent Document 1 has the following problems with respect to assemblability and assembly accuracy. First, when the L-shaped hooks 63 and 64 are fitted, as shown in FIG. 10, in the state where the coupling screw 65 is not fastened, the displacement is regulated in the butting direction (X-axis direction). In the Y-axis direction orthogonal to the X-axis direction, no restriction is applied, and therefore a positional shift in the Y-axis direction is likely to occur.

  Furthermore, when the housing members 61 and 62 are greatly displaced in the Y-axis direction, the assembly of the housing members 41 and 42 may be inadvertently detached. If the positional deviation is not regulated, a jig for positioning at an appropriate fitting position is required when fastening the coupling screw 65, and there is a problem that the assemblability is not good.

  Of course, the L-shaped hooks 63 and 64 may be formed with a click stop type positioning portion with fine irregularities 67 as shown in FIG. However, in the click stop type positioning portion, the regulating force against the positional deviation in a state where the coupling screw 65 is not fastened is weak.

  Further, when the L-shaped hooks 63 and 64 are fitted, the hole 66 into which the coupling screw 65 is screwed is defined only by the inner wall surfaces 63B and 64B facing each other in the X-axis direction. The coupling screw 65 is inscribed with the inner wall surfaces 63B and 64B. The fastening force of the coupling screw 65 acts directly in the X-axis direction by screwing of the coupling screw 65, but only the frictional force of the L-shaped hooks 63, 64 acts in the Y-axis direction. For this reason, there has been a problem that misalignment in the Y-axis direction is likely to occur and the assembly accuracy is not good.

  If the assembling accuracy is poor, the gap between the dividing lines L1 and L2 tends to increase, which affects the appearance of the outer peripheral surface. The appearance of the dividing lines L1 and L2 is particularly problematic when the dividing lines L1 and L2 are formed on the upper surface 70A and the lower surface 70B that are more conspicuous than the side surfaces 70C and 70D, for example, as in the case body 70 shown in FIG. It becomes.

  An object of the present invention is to provide a housing structure of an electronic device in which a pair of housing members can be easily assembled and assembled.

  In order to achieve the above object, a housing structure of an electronic device according to the present invention includes a pair of housing members, a first fitting portion, a second fitting portion, a first bent portion, a second bent portion, and a hole portion. It has. The pair of housing members are a pair of housing members formed by dividing the outer peripheral wall of the cylindrical housing body along two dividing lines extending in a direction perpendicular to the circumferential direction. The first and second end portions formed corresponding to the dividing lines are brought into contact with each other and coupled. A 1st fitting part is a 1st fitting part which is formed in each 1st end part of a pair of housing members, and has a crevice which becomes a crevice in the abutting direction of end parts, and a crevice is a butting direction And an inner tongue piece that is formed on the inner side of the housing body and extends in the abutting direction than the outer tongue piece. A 2nd fitting part is the convex type which is formed in each 2nd edge part of a pair of housing members, and becomes convex in the abutting direction of edge parts, and is inserted into a crevice, and the 1st fitting part Mates with. The first bent portion is formed at the tip of the inner tongue piece portion in the first fitting portion, and is bent toward the outer tongue piece portion. The second bent portion is formed at the tip of the second fitting portion, and in a state where the second fitting portion is inserted into the recess, the second bent portion is bent in a direction facing the inner tongue piece portion, and in the butting direction, Opposite the first bend. The hole portion is orthogonal to the butting direction and the butting direction by the second fitting portion including the first bent portion, the inner tongue piece portion, and the second bent portion in a state where the second fitting portion is inserted into the recess. It is a hole in which four inner wall surfaces in the direction are defined, and a coupling screw for fastening that comes into contact with the inner wall surface in four directions is screwed.

  The positioning portion is a positioning portion that positions the fitting position with the first fitting portion by contacting the tip of the outer tongue piece portion on the outer facing surface facing the outer tongue piece portion in the second fitting portion. Is preferably formed.

  The positioning portion has a first positioning surface that positions a fitting position between the positioning portion and the first fitting portion in a direction orthogonal to the abutting direction. In the outer facing surface, the first positioning surface is the second positioning surface. It is preferable that the height is higher by one step toward the outer tongue piece portion than the distal end side of the fitting portion.

  It is preferable that the positioning part has a second positioning surface for positioning the fitting position with the first fitting part in the abutting direction.

  It is preferable that gaps are formed at the four corners of the hole so as to release chips from the coupling screw when the coupling screw is screwed together.

  The outer peripheral surface of the housing body is composed of an upper surface, a lower surface arranged in parallel with the upper surface, and both side surfaces connecting the upper surface and the lower surface, and two dividing lines are formed on the upper surface and the lower surface, respectively. It is preferable that

  The first fitting part preferably has a C-shaped cross section, and the second fitting part preferably has a J-shaped cross section.

  The pair of housing members are preferably coupled by attaching coupling screws at both ends of the dividing line.

  ADVANTAGE OF THE INVENTION According to this invention, the housing | casing structure of an electronic device with favorable assemblability and assembly | attachment precision of a pair of housing member can be provided.

It is a perspective view which shows the external appearance of the audio equipment to which the housing structure of this invention is applied. It is a perspective view which shows the state which removed the decorative cover from the housing body. It is a disassembled perspective view of a housing | casing. It is a disassembled perspective view of a housing body. It is sectional drawing which shows the state before making a pair of housing members fit. It is sectional drawing which shows the state which made a pair of housing | casing members fit. It is principal part sectional drawing which shows the structure of the 1st and 2nd fitting part before the fastening by a coupling screw. It is principal part sectional drawing which shows the structure of the 1st and 2nd fitting part after the fastening by a coupling screw. It is sectional drawing of the conventional housing structure fitted with an L-shaped hook. It is principal part sectional drawing of the L-shaped hook of the housing | casing structure shown in FIG. It is sectional drawing of the housing | casing structure of the comparative example which has arrange | positioned the dividing line on the upper surface and the lower surface.

  1 and 2, an acoustic device 10 that is an electronic device has the housing structure of the present invention. The acoustic device 10 is, for example, a headphone amplifier. The housing 11 of the audio device 10 is provided with a volume adjustment knob 12, a headphone terminal 13, and an input terminal 14 on the outer peripheral surface.

  The housing 11 has a front surface 11A, a back surface 11B opposite to the front surface 11A, an upper surface 11C connecting the front surface 11A and the back surface 11B and extending in the front-rear direction when the surface on which the volume adjustment knob 12 is disposed is the front surface. It is a box shape formed by a lower surface 11D arranged in parallel with the upper surface and a peripheral surface including both side surfaces 11E and 11F. On the peripheral surface, the side surfaces 11E and 11F connected to the upper surface 11C and the lower surface 11D are formed of curved surfaces, and the cross section of the housing 11 has a substantially oval shape.

  The housing 11 includes a housing body 15 and a decorative cover 16. The decorative cover 16 is attached to the front surface of the housing body 15. The volume adjustment knob 12 has a cylindrical shape and is attached so as to be able to be rotated. The housing body 15 accommodates a control circuit such as an amplifier circuit that amplifies the input sound. When the volume adjustment knob 12 is rotated, the volume of the sound output to the headphones is adjusted.

  In addition, a headphone terminal 13 and an input terminal 14 are provided on the front surface 11 </ b> A together with a volume adjustment knob 12. A headphone cable is connected to the headphone terminal 13. The input terminal 14 is for inputting a digital or analog audio signal from an external device (not shown). The decorative cover 16 has openings 16 </ b> A to 16 </ b> C, and exposes the volume adjustment knob 12, the headphone terminal 13, and the input terminal 14.

  The back surface 11B is also provided with a power supply terminal, a USB (Universal Serial Bus) connector, an output terminal (none of which is shown) for outputting an audio signal to an external device, and the like. There are two types of USB connectors: one that allows both audio signal input and power supply from an external device, and one that allows only audio signal input. For example, the output terminal outputs an analog audio signal to an external device.

The side surface 11E is provided with a plurality of operation switches 17 for performing various operations. The operation switch 17 is, for example, a switch that switches HIGH / LOW of the output level of the audio signal, a switch that switches ON / OFF of power supply using USB, and a switch that switches digital / analog of the input of the audio signal.

  As shown in FIGS. 3 and 4, the housing body 15 has a cylindrical shape with an oval cross-sectional shape. The outer peripheral wall of the housing body 15 constitutes an upper surface 11C, a lower surface 11D, a side surface 11E, and a side surface 11F of the housing 11. A front cover 20 and a rear cover 21 are attached to the front and back openings of the housing body 15.

  The housing body 15 includes a pair of housing members 23 and 24. The casing members 23 and 24 are formed of, for example, a metal plate, and are coupled by fastening a coupling screw 22 as will be described later. The coupling screw 22 is a male screw having a thread groove formed on the outer peripheral surface of the shaft portion, and is made of the same metal as the housing members 23 and 24, for example.

  The pair of housing members 23 and 24 are formed by dividing the outer peripheral wall of the housing body 15 along two dividing lines L1 and L2 extending in a direction (Z direction) orthogonal to the circumferential direction. As shown in FIG. 3, the dividing line L1 is formed on the upper surface 11C, and the dividing line L2 is formed on the lower surface 11D. The dividing line L1 is formed on the upper surface 11C at a position offset from the center in the width direction to the side surface 11F. On the other hand, the dividing line L2 is formed at a position offset from the center in the width direction to the side surface 11E side on the lower surface 11D. Thereby, the outer peripheral wall 25 of the housing member 23 constitutes most of the upper surface 11C, the side surface 11E, and a part of the lower surface 11D. On the other hand, the outer peripheral wall 26 of the housing member 24 constitutes most of the lower surface 11D, the side surface 11F, and a part of the upper surface 11C. In the outer peripheral wall 25 of the housing member 23, openings 23C to 23E for exposing the operation switch 17 are formed in a portion corresponding to the side surface 11E.

  The pair of housing members 23, 24 have first end portions 23A, 24A and second end portions 23B, 24B formed on the outer peripheral walls 25, 26 corresponding to the dividing line L1. The housing member 23 has a first end 23A formed corresponding to the dividing line L1 and a second end 23B formed corresponding to the dividing line L2. The casing member 24 has a second end 24B formed corresponding to the dividing line L1, and a first end 24A formed corresponding to the dividing line L2. In the housing members 23 and 24, the end portions of the first end portion 23A and the second end portion 24B, which are formed corresponding to the dividing line L1, are abutted and joined to each other, and on the other hand, formed corresponding to the dividing line L2. The end portions of the second end portion 23B and the first end portion 24A are brought into contact with each other and coupled.

  A first fitting portion 31 is formed on each of the first end portion 23 </ b> A that is one end portion of the housing member 23 and the first end portion 24 </ b> A that is one end portion of the housing member 24. A second fitting portion 32 is formed on each of the second end portion 23B, which is the other end portion of the housing member 23, and the second end portion 24B, which is the other end portion of the housing member 24. Yes. The first fitting portion 31 of the housing member 23 is fitted with the second fitting portion 32 of the housing member 24, and the second fitting portion 32 of the housing member 23 is fitted with the first fitting portion of the housing member 24. The mating part 31 is fitted.

  As shown in FIGS. 5 and 6, the first fitting portion 31 has a recessed portion 31 </ b> A that is recessed in the abutting direction (X-axis direction) with the second fitting portion 32. The recess 31A has an outer tongue piece 41 extending in the abutting direction (X-axis direction) and an inner tongue piece 42 formed inside the housing body 15 from the outer tongue piece 41 and extending in the abutting direction. The cross-sectional shape is substantially C-shaped.

  The outer tongue piece 41 constitutes a part of the outer peripheral walls 25 and 26 in the housing members 23 and 24, respectively. A first bent portion 33 that is bent toward the outer tongue piece 41 is provided at the tip of the inner tongue piece 42.

  The 2nd fitting part 32 is a convex type which becomes convex in the butting direction (X-axis direction) with the 1st fitting part 31, and fits with the 1st fitting part 31 by being inserted in crevice 31A. . The second fitting portion 32 has a substantially J-shaped cross section, and a second bent portion 34 is formed at the tip. The second bent portion 34 bends in a direction facing the inner tongue piece portion 42 in a state in which the second fitting portion 32 is inserted into the recess 31A, and is the first in the butting direction (X-axis direction). Opposing to the bent portion 33.

  As shown in FIGS. 7 and 8, the second fitting including the first bent portion 33, the inner tongue piece portion 42, and the second bent portion 34 in a state where the second fitting portion 32 is inserted into the recess 31 </ b> A. The joint portion 32 forms a hole 36 whose inner wall surface is defined. The hole 36 is a screw hole into which the coupling screw 22 for fastening is screwed. As shown in FIG. 1, the coupling screw 22 is attached to both ends of each of the dividing lines L1 and L2.

  The cross-sectional shape of the hole 36 is a substantially square shape. Specifically, since the first bent portion 33 and the second bent portion 34 face each other in the butting direction (X-axis direction), the inner wall surface 36A in two directions in the butting direction of the hole portion 36 is defined by these. Further, since the inner tongue piece portion 42 and the second fitting portion 32 face each other in the direction (Y-axis direction) perpendicular to the abutting direction, the inner wall surfaces in two directions of the hole portion 36 in the Y-axis direction thereby. 36B defines. As a result, the hole portion 36 defines a total of four directions including two directions in the X-axis direction and two directions in the Y-axis direction.

  Since the hole 36 has a substantially square cross section, the coupling screw 22 has a circular cross section at four points: two inner wall surfaces 36A opposed in the X-axis direction and two inner wall surfaces 36B opposed in the Y-axis direction. In contact with the outer periphery of In a state where the coupling screw 22 is not screwed, the diameter of the inscribed circle of the hole portion 36 is smaller than the outer diameter of the coupling screw 22. As shown in FIG. 8, when the coupling screw 22 is screwed into the hole portion 36, the second fitting portion 32 and the inner tongue piece portion 42 are pushed and spread in a direction in which they are separated from each other. As a result, the diameter of the hole 36 is increased to the valley diameter of the coupling screw 22 (the groove portion of the male screw indicated by the solid line). A two-dot chain line is an outer diameter of the coupling screw 22 (a thread portion of the male screw). A thread groove having a depth corresponding to the outer diameter of the coupling screw 22 is formed on the inner wall surfaces 36 </ b> A and 36 </ b> B of the hole portion 36 by screwing of the coupling screw 22.

  As shown in FIG. 8, at the four corners of the hole portion 36, gaps 44 are formed for releasing chips from the coupling screw 22 when the coupling screw 22 is screwed. For example, the gap 44 has an inner diameter of the proximal end portion of the first bent portion 33 in the inner tongue piece portion 42 or an inner diameter of the proximal end portion of the second bent portion 34 in the second fitting portion 32. It is formed by making it smaller than the outer diameter.

  In FIG. 8, since the inner wall surfaces 36A and 36B of the hole portion 36 are inscribed with the outer periphery of the coupling screw 22 at four points, when the coupling screw 22 is screwed, the coupling screw 22 is secondly fitted as indicated by an arrow. A force is applied to the joint portion 32 and the inner tongue piece portion 42 so as to separate them in an abutting direction (X-axis direction) and an oblique direction inclined by about 45 ° with respect to the Y-axis direction orthogonal thereto. Thereby, the front-end | tip part of the 2nd fitting part 32 deform | transforms toward the outer tongue piece part 41, and the outer opposing surface 32A which opposes the outer tongue piece part 41 in the 2nd fitting part 32 of the recessed part 31A. Pressed against the inner wall.

  In the second fitting portion 32, a positioning portion 35 that contacts the tip 41 </ b> A of the outer tongue portion 41 and positions the fitting position with the first fitting portion 31 is formed on the outer facing surface 32 </ b> A. . The positioning unit 35 has a first positioning surface 35A and a second positioning surface 35B.

  35 A of 1st positioning surfaces position the fitting position between the 1st fitting parts 31 in the Y-axis direction orthogonal to a butting direction (X-axis direction). When the first positioning surface 35 </ b> A comes into contact with the outer tongue piece portion 41, the fitting position in the Y-axis direction is positioned at the proximal end portion of the second fitting portion 32. 35 A of 1st positioning surfaces are one step higher toward the outer side tongue piece part 41 rather than the front end side of the 2nd fitting part 32 in 32 A of outer side opposing surfaces. For this reason, a gap D <b> 2 is secured on the distal end side of the second fitting portion 32. The gap D2 is a space where the second fitting portion 32 that receives pressure in the oblique direction with respect to the X-axis direction and the Y-axis direction by the coupling screw 22 escapes in the Y-axis direction.

  Further, the second positioning surface 35B positions the fitting position with the first fitting portion 31 in the abutting direction (X-axis direction). The second positioning surface 35 </ b> B abuts the tip of the outer tongue piece 41, thereby restricting the amount of insertion of the second fitting portion 32 into the recess 31 </ b> A and positioning the fitting position in the X-axis direction. Thereby, a gap D1 in the X-axis direction is formed between the concave portion 31A and the second fitting portion 32. As described above, the second fitting portion 32 is pressed against the X-axis direction and the Y-axis direction by the coupling screw 22. The gap D1 is a space where the second fitting portion 32 escapes in the X-axis direction.

  Next, the operation of the housing structure of the electronic device of the present invention will be described while explaining the assembly process of the housing body 15. First, as shown in FIG. 5, in order to fit the first fitting portion 31 and the second fitting portion 32 of the pair of housing members 23, 24, the first end where the first fitting portion 31 is formed. The end portions of the second end portion 24B in which the portion 23A and the second fitting portion 32 are formed, the second end portion 23B in which the second fitting portion 32 is formed, and the first fitting portion 31 are formed. The end portions of the first end portion 24A face each other.

  As shown in FIG. 7, when fitting the first fitting portion 31 and the second fitting portion 32, the second fitting portion 32 is inserted into the recess 31 </ b> A of the first fitting portion 31. It is slid in the Z-axis direction from the front end or rear end of the joint portion 31 and inserted. Thereby, in the state in which each 1st fitting part 31 and the 2nd fitting part 32 were fitted, the edge parts of the 1st end part 23A and the 2nd end part 24B, the 2nd end part 23B, and the 1st The ends of the end 24A are butted together. In a state where the second fitting portion 32 is inserted into the recess 31A and the housing members 23 and 24 are assembled together, even if the coupling screw 22 is not fastened, the housing members 23 and 24 are misaligned. Less is. Therefore, assemblability is good.

  That is, since the first bent portion 33 and the second bent portion 34 face each other in the abutting direction (X-axis direction), even if the housing members 23 and 24 are displaced in a direction away from each other in the X-axis direction, The 1st bent part 33 and the 2nd bent part 34 contact | abut, and the position shift of a X-axis direction is controlled. Furthermore, since the 1st bending part 33 and the 2nd bending part 34 contact | abut, the assembly | attachment of the housing members 23 and 24 does not remove | deviate carelessly. Moreover, since the 2nd fitting part 32 will be in the state pinched | interposed by the outer tongue piece part 41 and the inner tongue piece part 42, the position shift of the Y-axis direction orthogonal to a butting direction (X-axis direction) is also controlled. The

  As a result, even when the coupling screws 22 are not fastened, the positional displacement of the assembly positions of the housing members 23 and 24 is restricted, so that positioning work using a jig or the like becomes unnecessary, and the assembly process is simplified. It can be carried out.

  In the state where the first fitting portion 31 and the second fitting portion 32 are fitted, the second fitting portion 32 including the first bent portion 33, the inner tongue piece portion 42, and the second bent portion 34, Inner wall surfaces 36A and 36B in four directions in the X-axis direction and the Y-axis direction of the hole 36 are defined.

  As shown in FIG. 8, the inner wall surfaces 36 </ b> A and 36 </ b> B of the hole 36 are inscribed with the outer periphery of the coupling screw 22 at four points. Therefore, when the coupling screw 22 is screwed into the hole portion 36, the coupling screw 22 causes the distal end portion of the second fitting portion 32 and the inner tongue piece portion 42 to be approximately about the X-axis direction and the Y-axis direction. A force is applied in a direction away from the oblique direction inclined by 45 °. As a result, due to the force acting in the Y-axis direction, the distal end portion of the second fitting portion 32 is deformed toward the outer tongue piece portion 41, and the second fitting portion 32 has the outer facing surface 32A and the recess portion 31A. It is pressed against the inner wall surface. Further, the tip portion of the second fitting portion 32 is abutted against the inner wall surface at the back of the recess 31A by the force acting in the X-axis direction.

  When the coupling screw 22 is screwed in this way, the positioning portion 35 formed at the proximal end portion of the second fitting portion 32 comes into contact with the distal end of the outer tongue piece portion 41, so that the second fitting is performed. The fitting position of the part 32 in the X-axis direction and the Y-axis direction is regulated. Thereby, the clearance gap D1 and the clearance gap D2 are formed. Even when the second fitting portion 32 is deformed by the screwing of the coupling screw 22 due to the gaps D1 and D2, a space for the second fitting portion 32 to escape outward is secured in the recess 31A.

  As described above, the force of the coupling screw 22 acts on the first fitting portion 31 and the second fitting portion 32 in the X-axis direction and the Y-axis direction. For this reason, the 1st fitting part 31 and the 2nd fitting part 32 can be fitted in the state without backlash in any direction of the X-axis direction and the Y-axis direction. Thereby, the assembly | attachment precision of a pair of housing members 23 and 24 improves. By improving the assembling accuracy, the gaps at the dividing lines L1 and L2 can be reduced.

  As shown in FIGS. 3 and 4, in the outer peripheral surface of the cylindrical housing body 15, when the dividing lines L <b> 1 and L <b> 2 are on the upper surface 11 </ b> C and the lower surface 11 </ b> D, compared to the case on the side surface 11 </ b> E and the side surface 11F The dividing lines L1 and L2 are very conspicuous. In this case, reducing the gap between the dividing lines L1 and L2 is very important for improving the appearance of the outer peripheral surface of the housing body 15.

  Moreover, in order to improve the aesthetics of the housing body 15, there is a demand for the operation unit such as the operation switch 17 to be disposed at a less conspicuous position such as the side surfaces 11E and 11F that are less conspicuous than the upper surfaces 11C and 11D. In this case, if the dividing lines L1 and L2 are provided on the side surfaces 11E and 11F, the operation unit cannot be disposed. Therefore, the dividing lines L1 and L2 must be formed on the upper surface 11C and the lower surface 11D as in this example.

  According to the present invention, the dividing lines L1 and L2 become inconspicuous due to the improved assembly accuracy. For this reason, the present invention is particularly effective when the dividing lines L1 and L2 are provided at conspicuous positions such as the upper surface 11C and the lower surface 11D of the outer peripheral surface of the housing body 15.

  When the coupling screws 22 are attached at both ends of each of the dividing lines L <b> 1 and L <b> 2, the housing members 23 and 24 are coupled by fastening the coupling screws 22. After the casing members 23 and 24 are coupled, various parts are further attached to the casing body 15 to complete the assembly of the casing 11.

  In the above embodiment, the dividing line L1 is formed on the upper surface 11C and the lower surface 11D. However, the present invention is not limited to this, and the present invention is applied even when the dividing lines L1 and L2 are formed on the both side surfaces 11E and 11F. Can do.

  The present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 10 Audio equipment 11 Housing | casing 15 Housing | casing main body 22 Coupling screws 23 and 24 Housing members 25 and 26 Outer peripheral wall 31 1st fitting part 31A Recessed part 31B and 32A Bending part inner side 32 Second fitting part 33 1st bending part 2nd bending part 35 Positioning part 36 Hole part 36A, 36B Inner wall surface 41 Outer tongue piece part 42 Inner tongue piece part D1, D2 Crevice L1, L2 Dividing line

Claims (8)

A pair of casing members in which the outer peripheral wall of the cylindrical casing body is divided along two dividing lines extending in a direction orthogonal to the circumferential direction, each corresponding to each of the two dividing lines A pair of housing members that are joined together by butting the first and second end portions formed respectively;
A first fitting portion formed at each of the first end portions of the pair of housing members and having a concave portion that is concave in the abutting direction of the end portions, and the concave portion extends in the abutting direction. A first fitting portion having an outer tongue piece portion and an inner tongue piece portion that is formed on the inner side of the housing body than the outer tongue piece portion and extends in the abutting direction;
Each of the pair of housing members has a convex shape that is formed in the second end portion and is convex in the abutting direction of the end portions, and is fitted into the first fitting portion by being inserted into the concave portion. A second fitting portion to be mated,
In the first fitting portion, a first bent portion formed at a tip of the inner tongue piece portion and bent toward the outer tongue piece portion;
Formed at the tip of the second fitting portion, in a state where the second fitting portion is inserted into the recess, bent in a direction facing the inner tongue piece portion, and in the butting direction, A second bent portion facing the first bent portion;
In the state where the second fitting portion is inserted into the recess, the butting direction and the butting are performed by the second fitting portion including the first bent portion, the inner tongue piece portion, and the second bent portion. An electronic device comprising: a hole in which inner walls in four directions in a direction orthogonal to a direction are defined, and a hole in which a coupling screw for fastening that contacts the inner wall in four directions is screwed. Enclosure structure.   In the second fitting portion, a positioning portion that abuts the tip of the outer tongue piece portion on the outer facing surface facing the outer tongue piece portion and positions the fitting position with the first fitting portion. The housing structure of the electronic device according to claim 1, wherein: The positioning portion has a first positioning surface that positions a fitting position between the positioning portion and the first fitting portion in a direction orthogonal to the abutting direction;
3. The housing structure of the electronic device according to claim 2, wherein the first positioning surface is one step higher toward the outer tongue piece portion than the distal end side of the second fitting portion in the outer facing surface. .   The case structure of the electronic device of Claim 2 or 3 with which the said positioning part has the 2nd positioning surface which positions the fitting position between the said 1st fitting parts in the said abutting direction.   The case of the electronic device of any one of Claims 1-4 in which the clearance gap which escapes the chip | tip by the said coupling screw is formed in the four corners of the said hole when the said coupling screw is screwed together. Construction. The outer peripheral surface of the housing body is composed of an upper surface, a lower surface arranged in parallel with the upper surface, and both side surfaces connecting the upper surface and the lower surface,
6. The electronic device casing structure according to claim 1, wherein one of the two dividing lines is formed on each of the upper surface and the lower surface. 7. The first fitting portion has a C-shaped cross section,
The casing structure of the electronic device according to claim 1, wherein the second fitting portion has a J-shaped cross section.   The housing structure for an electronic device according to claim 1, wherein the pair of housing members are coupled by attaching the coupling screws at both ends of the dividing line.

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