JP4908827B2 - Welding structure of joining member, electronic device and manufacturing method thereof - Google Patents

Description

  The present invention relates to a welding structure for a joining member, an electronic device, and a method for manufacturing the same, and particularly, a welding structure suitable for welding and fixing a joining member using ultrasonic waves or the like, and a member formed using the welding structure. Alternatively, the present invention relates to an electronic device such as a mobile phone having a housing and a manufacturing method thereof.

  Conventionally, there is an ultrasonic welding technique as a technique for joining two resinous parts such as plastic. In the ultrasonic welding technique, two parts are welded by vibrating the surfaces in contact with each other by ultrasonic energy to generate heat and melt (see, for example, Patent Documents 1 and 2).

  Here, another conventional ultrasonic welding technique will be described using a mobile phone as an electronic device as an example. FIG. 9 is an exploded perspective view of a conventional mobile phone. This mobile phone is composed of an upper housing and a lower housing, and FIG. 9 shows a case 101 of the upper housing and a panel 102 welded to the case 101. The case 101 and the panel 102 are respectively shown in FIG. It consists of a plastic resin such as plastic. Each of the case 101 and the panel 102 has a display portion opening 103 and an operation portion opening 104 formed therein. The display portion opening 103 is provided with, for example, an LCD (Liquid Crystal Display), and the operation portion opening 104 is provided with a jog dial, operation buttons, and the like.

  A flat portion 106 is formed at the peripheral portion of the display portion opening 103 of the case 101, and ultrasonic welding ribs 105 and holes 107 are formed in the flat portion 106. Also, ultrasonic welding ribs 105 are formed on the periphery of the operation portion opening 104. By applying ultrasonic vibration in a state where these ultrasonic welding ribs 105 are in contact with the joint surface of the panel 102, the ultrasonic welding ribs melt and the case 101 and the panel 102 are welded and fixed. The hole 107 is used for the purpose of determining the position of the panel 102 with respect to the case 101 during ultrasonic welding. A perspective view and a front view of the mobile phone after ultrasonic welding are shown in FIGS. 10 and 11, respectively.

  Next, conventional ultrasonic welding will be described with reference to FIGS. FIG. 12 is an enlarged cross-sectional view of a main part (XX line) before welding according to the prior art. The case 101 and the panel 102 are ultrasonically welded as follows. First, the panel 102 is placed on the case 101 placed on a horizontal base (not shown). At this time, the positioning rib 108 formed in the panel 102 is inserted into the hole 107 formed in the flat portion 106 of the case 101 to determine the position of the panel 102 with respect to the case 101. The same applies to the other positioning ribs and holes. Due to the structure of the positioning ribs 108 and the holes 107, the panel 102 can be positioned more accurately and ultrasonically welded.

  Usually, when ultrasonic welding is performed, a gap is provided between parts to be joined to prevent melting or damage of a portion other than the joining surface. Therefore, in order to ensure an appropriate gap 109, it is important to position accurately by the structure of the positioning rib 108 and the hole 107.

And it presses on the upper surface of the panel 102 so that the lower end surface of an ultrasonic horn (not shown) may surface-contact. In this state, when the ultrasonic horn is vibrated ultrasonically, the panel 102 vibrates at an ultrasonic cycle. The panel 102 that vibrates ultrasonically relatively vibrates the ultrasonic welding rib 105 that is a contact portion with the case 101. The case 101 and the panel 102, which relatively ultrasonically vibrate, generate frictional heat by the energy of ultrasonic vibration, and the case 101 and the panel 102 are melted, cooled, cured and welded by this frictional heat. FIG. 13 shows an enlarged cross-sectional view of the main part (XX line) after welding.
Japanese Patent Laid-Open No. 5-11071 JP 2000-135740 A

  By the way, as for the thing of patent document 1 and 2, in order to suppress a burr | flash (protrusion), a welding bulging, etc., eliminating the position shift, the rib ( A recess or groove for receiving (resin) (FIG. 1 of Patent Document 1 and FIG. 11 of Patent Document 2) is provided. However, there is a problem in that the concave portion needs an operation of calculating a volume according to the amount of the rib to be melted and forming a complicated shape that satisfies the volume.

  9 to 13 determines the respective positions in the X, Y, and Z directions of the parts to be welded 101, 102, applies ultrasonic vibrations to the parts to be welded 101, 102, and ultrasonic weld ribs. 105 is melted. However, since there is no groove or recess for receiving the melted ultrasonic welding rib 105, a sufficient number of ultrasonic welding ribs are provided instead of reducing the size of each ultrasonic welding rib 105. The reason is that it is necessary to secure adhesive (welding) strength while reducing the capacity of the resin to be melted to prevent melting.

  However, since many ultrasonic welding ribs 105 are required and the positioning ribs 108 must be provided separately from the ultrasonic welding ribs 105 for positioning, a wide flat surface portion 106 is required to install them. Was needed. For this reason, design constraints and the size of electronic device terminals may be affected, which is a major demerit in design and device design.

  FIG. 14 shows a space required for installing the ultrasonic welding rib 105 of the electronic apparatus shown in FIG. FIG. 14 shows a cross section in the vicinity of the XX line (FIG. 11). For example, the space (width) of the flat portion 106 required for installing the ultrasonic welding rib 105 having a width of 0.2 mm is super The total width of 1.2 mm is required by adding 2 × 0.5 mm on both sides to the width 0.2 mm of the sonic welding rib 105 itself. When two ultrasonic welding ribs 105 are installed, a width of 2.4 mm, which is twice as large, is required.

  In recent years, a mobile terminal such as a mobile phone is required to have a large display unit, but is a positioning area when joining components having large openings 103 and 104 as shown in FIGS. There is a problem in that it is difficult to secure the flat portion 106, and a sufficient number of ultrasonic welding ribs 105, that is, adhesion (welding) strength cannot be secured.

  This invention is made in view of such a point, and it aims at simplifying the structure of the junction part of joining object components, and reducing the space which arrange | positions an ultrasonic welding rib, ensuring adhesive strength. .

In order to solve the above-described problem, the welding structure of the joining member of the present invention is a welding structure of a joining member in which the first member and the second member are joined by ultrasonic welding, and the first member is joined to the first member. A convex portion that also serves as a positioning member provided along the side of the member, and is a cross section in a plane that is perpendicular to the surface on which the convex portion is provided and parallel to the direction that regulates the position during ultrasonic welding Is a substantially triangular shape or a shape having a slope, and a convex surface having a curved surface in a part of the shape, and a joint surface between the second member and the first member along the side of the second member A concave portion having a shape corresponding to a shape having a substantially triangular shape or inclined surface of the convex portion and a curved surface in a part of the shape, and provided on the surface of the convex portion or the concave portion, by ultrasonic vibration. A melting protrusion that melts, and the melting protrusion is a recess or Is melted on the surface of the parts in contact with each convex portion and the surface of the recess by the melted melted projection is characterized in that the first and second members are welded are joined.

According to the above configuration, the cross section in the plane parallel to the direction that is provided along the side of the first member and that is perpendicular to the surface on which the convex portion is provided and regulates the position at the time of ultrasonic welding, A second member with respect to the first member is formed by a combination of a convex portion having a substantially triangular shape or a slope having a curved surface in a part of the shape and a concave portion of the second member corresponding to the convex portion. And the ultrasonic welding process can be performed by the melt projection formed on the surface of the convex portion while the position is held. Therefore, the convex portion can be used as a positioning member, and at the same time, the surface (slope) can also be used as a space for installing the melt projection, and the structure of the joining portion of the parts to be joined can be simplified.

The electronic device of the present invention is an electronic device having a case in which a first member and a second member are joined by ultrasonic welding, and the case is formed along the side of the first member with the first member. A convex portion also serving as a positioning member provided, and a cross section in a plane perpendicular to the surface on which the convex portion is provided and parallel to the direction for regulating the position at the time of ultrasonic welding is substantially triangular or Provided on the joint surface between the convex portion having a slope and a curved surface in a part of the shape, and the first member in the second member along the side of the second member, A concave portion having a substantially triangular shape or a shape having a slope and corresponding to a shape having a curved surface in a part of the shape, and a fusion projection provided on the surface of the convex portion or the concave portion and melted by ultrasonic vibration This melting projection is in contact with the concave or convex surface Is melted in a state, the convex portion and the surface of the recess by the melted melted projection is characterized in that the first and second members are welded are joined.
The case is formed by joining a plurality of two or more members, and includes a member that stores an electronic circuit component of an electronic device, a member that determines the arrangement of a display, an operation component, and the like.

According to the above configuration, the cross section in the plane parallel to the direction that is provided along the side of the first member and that is perpendicular to the surface on which the convex portion is provided and regulates the position at the time of ultrasonic welding, A second member with respect to the first member is formed by a combination of a convex portion having a substantially triangular shape or a slope having a curved surface in a part of the shape and a concave portion of the second member corresponding to the convex portion. Therefore, the structure of the joining portion of the parts to be joined of the electronic device can be simplified. In addition, since the ultrasonic welding process is performed by the melt projection formed on the surface (slope) of the convex portion or the concave portion with the position held, the space for arranging the melt projection can be reduced.

The method for manufacturing an electronic device according to the present invention is a method for manufacturing an electronic device having a case in which a first member and a second member are joined, and the case is disposed on a side of the first member on the first member. A convex portion that also serves as a positioning member provided along the plane, and a cross section in a plane perpendicular to the surface on which the convex portion is provided and parallel to the direction that regulates the position during ultrasonic welding is substantially triangular. Protrusions having a shape or a slope and having a curved surface in a part of the shape, and provided on the joint surface of the second member along the side of the second member, A concave portion having a shape corresponding to a shape having a substantially triangular shape or an inclined surface and a curved surface in a part of the shape, and a fusion protrusion provided on the surface of the convex portion or the concave portion and melted by ultrasonic vibration And the fusion projection is a concave or convex surface. The molten projections are ultrasonically vibrated in a state where the molten projections are in contact with the concave portions or the convex portions, the molten projections are melted, and the surfaces of the convex portions and the concave portions are welded by the melted molten projections. The second member is joined.

According to the above method, since the molten protrusion formed on the surface (slope) of the convex portion or the concave portion and the surface (slope surface) of the concave portion or the convex portion are vibrated, the first member is vibrated. The second member can be easily positioned. Further, when ultrasonically vibrated, a cross-section in a plane parallel to a direction that is provided on the first member and is perpendicular to the surface on which the convex portion is provided and that regulates the position at the time of ultrasonic welding, Rotation in the pushing direction of the ultrasonic horn by a combination of a convex portion having a substantially triangular shape or a slope and a curved surface in a part of the shape and a concave portion of the second member corresponding to the convex portion And can be welded to an accurate position.

  ADVANTAGE OF THE INVENTION According to this invention, the structure of the junction part of joining object components can be simplified, and the space which arrange | positions an ultrasonic welding protrusion can be made small, ensuring adhesive strength. Moreover, rotation with respect to the pushing direction of the ultrasonic horn can be prevented, and welding can be performed at an accurate position.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to FIGS. In this embodiment, the welding structure according to the present invention is applied to a mobile phone which is one of electronic devices.

  FIG. 1 is an exploded perspective view of a mobile phone to which the present invention is applied. This mobile phone is composed of an upper housing and a lower housing. FIG. 1 shows a case 1 (first member) constituting the upper housing and a panel 2 (second member) welded to the case 1. It is shown. The case 1 and the panel 2 are each made of a plastic resin such as plastic and have a symmetrical shape. The case 1 and the panel 2 are respectively provided with a display portion opening 3 and an operation portion opening 4. The display opening 3 is provided with, for example, an LCD (Liquid Crystal Display), and the operation opening 4 is provided with a jog dial, operation buttons, and the like.

  A flat portion 6 is formed in the peripheral portion of the display portion opening 3 and the operation portion opening 4 of the case 1, and welding rib members 10 </ b> R and 10 </ b> L and ultrasonic welding ribs 5 are formed on the flat portion 6. ing. By applying ultrasonic vibration while the welding rib members 10R and 10L and the ultrasonic welding rib 5 are in contact with the joint surface of the panel 2, the ultrasonic welding rib 5 is melted and the case 1 and the panel 2 are welded and fixed. Is done. 2 and 3 are a perspective view and a front view, respectively, of the mobile phone after ultrasonic welding.

  The said welding rib member is an example of a convex part, and is a member which protrudes from member surfaces (plane), such as a case. Further, the ultrasonic welding rib is an example of a melting protrusion, and is a protrusion that melts by ultrasonic vibration.

  4 is a cross-sectional view taken along line AA of the mobile phone shown in FIG. The welded rib members 10R and 10L provided on the flat surface portion 6 of the case 1 are welded and fixed to the groove-shaped recess 8 formed in the panel 2. The groove-shaped recess 8 has a shape corresponding to the shape of the welding rib members 10R, 10L.

  Here, the welding rib member installed symmetrically on the mobile phone 1 will be described. Although the description will be made with reference to a perspective view around the left welding rib member 10L shown in FIG. 5, the same applies to the right welding rib member 10R.

  The welding rib member 10L is provided on the flat surface portion 6 between the opening of the case 1 and the peripheral wall 7, and is perpendicular to the flat surface portion 6 and parallel to the direction that regulates the position during ultrasonic welding. The cross section on the plane has a substantially triangular shape, and a plane 13 is formed on the top. The ridge refers to a shape that is continuous and long in a direction (in this example, the y direction) where the raised portion of the protrusion is present. The welding rib member 10L is provided along one direction (y direction) of the case 1. A plurality of resin-made ultrasonic welding ribs 12 that are in contact with the panel 2 and melt by ultrasonic vibration are formed on the slope 11 of the welding rib member 10L. The panel 2 and the case 1 are positioned by the convex shape of the welding rib member 10L, and the panel 2 and the case 1 are joined by the ultrasonic welding rib 12.

  In addition, the cross section of the welding rib member of this example is a symmetrical triangle (isosceles triangle). This is for reasons such as the processing cost of the ridges and recesses and the stability during ultrasonic welding. On the other hand, in the case where the width of the flat surface portion 6 is narrow and the installation space of the welding rib member is small, the slope on one side of the welding rib member is made close to vertical for the purpose of saving the space of the welding rib member (see below). Increasing the angle α of 8) is also conceivable. Or although the cross section of the welding rib member was substantially triangular, it is good also as a shape which has a curved surface on the surface of the inclined surface (slope) formed in other than a straight line, ie, a protruding item | line (convex part). For example, a so-called wrinkle shape having a semicircular cross section is conceivable. Furthermore, for example, a convex shape having a curved line (curved surface) in which two sides of a triangle in the cross section of the weld rib member are recessed in the direction of the center of gravity of the triangle can be considered.

  The ultrasonic welding rib 12 formed on the inclined surface 11 of the welding rib member 10L is formed discontinuously in the long direction of the ridge shape, that is, in the vertical direction of the case 1 of the mobile phone (along the side). This ensures the necessary adhesive strength with an appropriate amount of resin and at the same time prevents the resin melted by the ultrasonic welding rib 12 from protruding.

  Next, a method for welding the case 1 and the panel 2 configured as described above will be described. 6 and 7 show enlarged cross-sectional views of main parts before and after welding of the mobile phone, respectively.

  Case 1 and panel 2 are ultrasonically welded as follows. First, the panel 2 is placed on the case 1 placed on a horizontal base (not shown). The welding rib members 10 </ b> R and 10 </ b> L formed on the flat portion 6 of the case 1 are fitted into the groove-like recesses 8 formed on the panel 2, respectively, and the position of the panel 2 is determined with respect to the case 1. Due to the structure of the welding rib members 10R and 10L and the groove-shaped recess 8, the panel 2 can be positioned more accurately and ultrasonic welding can be performed.

  And it presses on the upper surface of the panel 2 so that the lower end surface of the ultrasonic horn 20 may surface-contact. In this state, when the ultrasonic horn 20 is ultrasonically vibrated and the oscillation is transmitted to the panel 2, the panel 2 vibrates at an ultrasonic cycle. The panel 2 that is ultrasonically vibrated relatively ultrasonically vibrates the ultrasonic welding rib 12 that is a contact portion with the case 1 (using a swing (vibration) difference). In the case 1 and the panel 2 that are relatively ultrasonically vibrated, frictional heat is generated by the energy of ultrasonic vibration, and the ultrasonic welding ribs 12 are melted by this frictional heat, and the groove-shaped concave portion 8 of the panel 2 is melted by the molten resin 15. And the inclined surfaces 11 of the welding rib members 10R and 10L on the case 1 are brought into close contact with each other. Then, after cooling and curing, as shown in FIG. 7, the joining surface 14 (and the groove-like recess 8) of the panel 2 and the flat portion 6 (and the welded rib members 10R and 10L) of the case 1 are joined.

  As described above, since welding is performed by the ultrasonic welding ribs 12 formed on the inclined surfaces 11 of the protruding rib-shaped welding rib members 10R and 10L, a pseudo flat surface (corresponding to the flat portion 106 of the prior art) is simulated. Therefore, the shape and method are advantageous for space-saving design.

  Further, since the position can be regulated by the two inclined surfaces 11 of the welding rib members 10R and 10L having a positioning function, the position regulating shapes such as the positioning ribs 108 in the x and y directions which have been conventionally required (FIGS. 12 and 12). 13), the position can be regulated. Therefore, the panel 2 is accurately positioned with respect to the case 1 and an appropriate gap 16 can be secured.

  In addition, as shown in FIGS. 6 and 7, when the flat surface 13 is provided on the upper portions of the welding rib members 10 </ b> R and 10 </ b> L, regulation in the z direction (height direction) is possible. In particular, when the flat surface 13 is made parallel to the flat surface portion 6 on which the welding rib members 10R and 10L are provided, positioning in the height direction becomes easier.

  Next, the proper value of the welding rib member and the ultrasonic welding rib provided on the inclined surface thereof will be described. FIG. 8 is an enlarged cross-sectional view of the welding rib member. In this example, the welding rib member 10R is illustrated, but the same applies to the welding rib member 10L.

  It is important that the ultrasonic welding ribs 12 have such an amount that the molten resin does not protrude from the inclined surface 11 after the welding, and sufficient adhesive strength can be secured. In FIG. 8, as an example, when the width d of the cross section of the weld rib member 10R is 1.4 mm and the angle α = 45 ° with respect to the plane portion 6 of the symmetric slope 11 is the installation width of the ultrasonic weld rib 12 with respect to the slope 11. The height a is set to 0.2 mm and the height b of the ultrasonic welding rib 12 from the inclined surface 11 is set to 0.15 mm. Two ultrasonic welding ribs having the same installation width (0.2 mm) as the prior art (FIG. 14) can be installed within a width of 1.4 mm. Each numerical value is an example, and the present invention is not limited to this example.

  The ultrasonic welding rib 12 formed between the top and the bottom of the slope 11 of the welding rib member 10R is a resin whose height (distance) c from the intersecting line formed by the flat portion 6 and the slope 11 is molten. Install so that no overhang occurs. For example, it is desirable that the position is substantially in the middle of the upper and lower portions of the slope or slightly closer to the top side.

  Furthermore, the adhesive strength between the case 1 and the panel 2 is determined by the height e of the welding rib members 10R and 10L, the height f of the panel 2, and the angle α of the inclined surface 11. For example, more stable bonding can be performed under conditions where the angle α of the slope 11 can be increased, such as the height f of the panel being high and the height e of the welding rib member being increased. On the other hand, when the height f of the panel is low, the angle α of the inclined surface 11 of the welding rib member becomes small and the height e becomes low, resulting in unstable bonding. Even if the height f of the panel is high, it is similarly unstable if the angle α of the slope is small. Note that the height e (or angle α) of the weld rib member 11 is further optimized when the thickness of the resin 15 that is melted and cured on the surface of the inclined surface 11 is also taken into consideration.

  According to the welding structure described above, the ultrasonic welding rib generated at the time of ultrasonic welding is a structure in which the plane portion is increased in a pseudo manner by using the inclined surfaces 11 of the welding rib members 10R and 10L for ultrasonic welding. It becomes a structure strong against protrusion by 12 molten resins.

  In addition, even in a space (planar portion) having a size that can only be installed conventionally, the two ultrasonic welding ribs 12 can be installed with the simple structure of this example, so that the space for arranging the ultrasonic welding ribs 12 can be reduced. Minimization is possible, space-saving design is possible, and design freedom is improved with no design constraints. Furthermore, since more ultrasonic welding ribs 12 can be installed even in a space-saving manner, the adhesive strength can be ensured.

  Moreover, since the said structure can adhere | attach, pressing the welding rib members 10R and 10L of the case 1 in the groove-shaped recessed part 8 of the panel 2, it has a structure strong with respect to position shift. In general, joining by ultrasonic welding tends to rotate with respect to the indentation direction due to the characteristics of the ultrasonic horn. As shown in FIGS. 12 and 13, it is ideal that the positioning rib 108 and the hole 107 are fitted with no gap, but in reality, even when the design gap (clearance) is zero, there is a relationship of crossing parts in manufacturing. There is always a gap. Therefore, at the time of ultrasonic welding, the case 101 and the panel 102 are relatively rotated with respect to the push-in direction of the ultrasonic horn. For this reason, there has conventionally been a positional shift of the joining parts, damage due to contact between the case 101 and the panel 102, and the problem is solved by the configuration of the present invention.

  Further, when a structure is provided in which a flat surface is provided on the upper portion of the welding rib members 10R and 10L and the position in the height direction is determined, variation in the gap 16 on the side surface of the panel 2 can be suppressed.

  In the above-described embodiment, an example in which the case 1 and the panel 2 of the mobile phone are joined has been described. However, the present invention can be applied when joining other parts of the mobile phone, such as joining the upper housing and the lower housing. Can also be applied, and can also be applied to the assembly process of electronic devices other than mobile phones.

  Moreover, although the said embodiment demonstrated the example which provided the ultrasonic welding rib 12 in the surface of welding rib member 10R, 10L (convex part), the ultrasonic welding rib 12 was provided in the surface (slope) of the groove-shaped recessed part 8. FIG. Even if provided, the object of the present invention can be achieved.

  Moreover, in the said embodiment, welding rib member 10R, 10L (convex part) is provided in case 1 (1st member) which becomes the lower side at the time of ultrasonic welding, and groove-shaped recessed part 8 is provided in upper panel 2 (2nd member). Although provided (see FIG. 4), conversely, a groove-like concave portion can be formed in the lower case 1 and a convex portion can be formed in the upper panel 2. However, depending on the shape of the weld rib member such as the height of the weld rib member being extremely high (the angle α is large), the lower case 1 has a groove shape in terms of the strength of the weld rib member during ultrasonic welding. In some cases, it is not preferable to form a convex portion on the concave portion or the upper panel 2.

  Moreover, in the said embodiment, although the welding rib members 10R and 10L provided in the circumference | surroundings of the opening part 3 for display parts of the case 1 were made into the protruding item | line shape long in the up-down direction, it installed in the circumference | surroundings of the opening part 4 for operation parts. It may be as short as possible. In addition, by providing a plurality of welding rib members having short bulging portions in the vertical direction in a direction perpendicular to the direction in which the position is restricted during ultrasonic welding, the necessary welding strength is obtained and accurate positioning is performed. It may be.

  Further, the present invention is not limited to the above-described embodiments. For example, as shown in FIGS. 1 and 5, welding rib members 10 </ b> R and 10 </ b> L and ultrasonic welding ribs 5 of conventional specifications are appropriately combined. Of course, various modifications and changes can be made without departing from the scope of the present invention.

It is a disassembled perspective view of the mobile phone which concerns on one embodiment of this invention. It is a perspective view after welding of the mobile phone according to one embodiment of the present invention. It is a front view after welding of the mobile phone which concerns on one embodiment of this invention. It is the sectional view on the AA line in FIG. It is a perspective view of the periphery of the welding rib member which concerns on one embodiment of this invention. It is a principal part expanded sectional view before the welding which concerns on one embodiment of this invention. It is a principal part expanded sectional view after the welding which concerns on one embodiment of this invention. It is an expanded sectional view of the welding rib member concerning one embodiment of the present invention. It is a disassembled perspective view of the conventional mobile phone. It is a perspective view after welding of the conventional mobile phone. It is a front view after welding of the conventional mobile phone. It is a principal part (XX line) expanded sectional view before welding in a prior art. It is a principal part (XX line) expanded sectional view after welding in a prior art. It is explanatory drawing of the space required in order to install an ultrasonic welding rib in a prior art.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Case (1st member), 2 ... Panel (2nd member), 3 ... Display part opening part, 4 ... Operation part opening part, 5 ... Ultrasonic welding rib, 6 ... Planar part, 7 ... Perimeter wall, DESCRIPTION OF SYMBOLS 8 ... Groove-shaped recessed part, 10R, 10L ... Welding rib member (convex part), 11 ... Slope, 12 ... Ultrasonic welding rib (melting protrusion), 13 ... Plane, 14 ... Joining surface, 15 ... Molten resin, 16 ... Gap

Claims (9)

A welding structure of a joining member formed by joining the first member and the second member by ultrasonic welding,
A convex portion that also serves as a positioning member provided along the side of the first member on the first member, and is perpendicular to the surface on which the convex portion is provided and in a direction that regulates the position during ultrasonic welding. A cross section in a plane parallel to the convex portion having a substantially triangular shape or a shape having a slope and a curved surface in a part of the shape,
It is provided on the joint surface of the second member with the first member along the side of the second member, and the convex portion has a substantially triangular shape or a sloped shape, and a part of the shape has a curved surface . and the recess of the shape corresponding to the shape,
Provided on the surface of the convex portion or the concave portion, and melted protrusions that melt by ultrasonic vibration;
Have
The molten projection is melted in contact with the surface of the concave portion or the convex portion, and the surface of the convex portion and the concave portion is welded by the melted molten projection to join the first and second members. The welding structure of the joining member. The shape having a slope and a curved surface in a part of the shape is a shape having a curved surface in a part of a substantially triangular shape.
The welding structure of the joining member according to claim 1. The top of the convex portion is welded structure of the bonding member according to claim 1 or 2 which is a plane substantially parallel to the plane in which the convex portion is provided. The melting protrusion, welding structural bonding member according to any one of claims 1 to 3 is formed between the upper and lower portions of the convex portion or the concave portion of the surface. The melting projection is at a predetermined height from the surface of the convex portion or the concave portion where the convex portion or the concave portion is provided, and the molten projection is melted when the molten projection becomes a molten state. The welding structure of the joining member according to any one of claims 1 to 4 , wherein the protrusion is formed of an amount of a plastic resin that does not protrude from a welding surface of the convex portion and the concave portion. The melting protrusion, welding structural bonding member according to any one of claims 1 to 5 are discontinuously formed in the side direction of the convex portion or the concave portion of the surface. The joining member according to any one of claims 1 to 6 , wherein a plurality of the convex portions are provided on a predetermined surface of the first member along a direction perpendicular to a direction that regulates a position during ultrasonic welding. Welding structure. An electronic device having a case in which a first member and a second member are joined by ultrasonic welding,
The case is
A convex portion that also serves as a positioning member provided along the side of the first member on the first member, and is perpendicular to the surface on which the convex portion is provided and in a direction that regulates the position during ultrasonic welding. A cross section in a plane parallel to the projection is a substantially triangular shape or a shape having a slope, and a convex portion as a positioning member that is a shape having a curved surface in a part of the shape,
It is provided on the joint surface of the second member with the first member along the side of the second member, and the convex portion has a substantially triangular shape or a sloped shape, and a part of the shape has a curved surface . and the recess of the shape corresponding to the shape,
Provided on the surface of the convex portion or the concave portion, and melted protrusions that melt by ultrasonic vibration;
Have
The molten projection is melted in contact with the surface of the concave portion or the convex portion, and the surface of the convex portion and the concave portion is welded by the melted molten projection to join the first and second members. Electronic equipment. A method of manufacturing an electronic apparatus having a case in which a first member and a second member are joined,
The case is a convex portion that also serves as a positioning member provided along the side of the first member on the first member, and the position is perpendicular to the surface on which the convex portion is provided and at the time of ultrasonic welding. The cross section in the plane parallel to the regulating direction has a substantially triangular shape or a shape having a slope, and a convex portion as a positioning member having a curved surface in a part of the shape, and the second member A shape corresponding to a shape having a substantially triangular shape or an inclined surface of the convex portion and a curved surface in a part of the shape, which is provided on a joint surface of the second member with the first member along the side. And a projection that is provided on the surface of the convex portion or the concave portion and melted by ultrasonic vibration,
Contacting the melt projection with the surface of the concave portion or the convex portion;
The molten protrusion is melted by ultrasonic vibration in a state where the molten protrusion is in contact with the concave portion or the convex portion,
A method of manufacturing an electronic device, wherein the surface of the convex portion and the concave portion is welded by the melted molten projection, and the first and second members are joined.

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