JP3023915U - Resin parts - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: High waterproofness and dustproofness are required because it is impossible to integrate the case and the lid by either the method using an adhesive or the method using ultrasonic welding. In this case, since packing is required, the number of parts is increased, and the packing must be assembled, so that the cost is increased. SOLUTION: The fixed body 3 made of a heat-welding resin, a fixed body 19 made of a heat-welding resin and attached to the fixed body 3, and both the fixed body 3 and the fixed body 19 Connecting portions 7 and 20 formed on the fixed body 3 to which the fixed body 19 is attached, and the fixed body 3 and the fixed body 19
1. A resin component 1 including a conductor 9 which is embedded in at least one of the connecting portions 7 and 20 so as to be partially exposed and which generates heat when energized.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a resin component mounted on an automobile or the like, and relates to a resin component including a case in which an electronic component is mounted and a lid covering an opening of the case.

[0002]

[Prior art]

 Generally, electronic parts of automobiles are contained in resin parts and are protected from dust and water. The resin component is composed of a case as a fixed body on which electronic components are mounted, and a lid as a fixed body that covers the opening of the case. Usually, the lid is fixed to the case by an adhesive or ultrasonic welding. When dustproofness and waterproofness are required, packing is placed between the lid and case.

[0003]

[Problems to be solved by the device]

 However, with the method using adhesive, if there is a part where the adhesive is not applied, there is a risk of poor adhesion, so it is necessary to make sure that there is no part where the adhesive is not applied. There is a problem that becomes complicated. Further, the adhesive may adhere to the electronic component, and the electronic component may become defective.

In the method of fixing by ultrasonic welding, there is a problem that a large load is applied to the resin component, and thus cracks or holes may occur. Especially when the resin part has a complicated shape, it is difficult to irradiate ultrasonic waves evenly to the welded part, so cracks and holes may occur in the part where ultrasonic waves are excessively irradiated, and conversely There is a possibility that the resin does not melt and does not adhere to the portion where the sound wave irradiation is insufficient. It is not possible to integrate the case and lid with either the method using an adhesive or the method using ultrasonic welding, so packing is required when high waterproofness and dustproofness are required. In addition to the increase in the number of parts, there is also the problem that the cost is high because the work of assembling the packing must be performed.

The present invention has been made in view of the above-mentioned problems of the related art, and the work of connecting the fixed portion and the fixed portion is simple, and the electronic parts in which the resin parts are housed become defective. To provide a resin part that does not have cracks or holes in the resin part and does not cause poor adhesion, and that can obtain high dustproofness and waterproofness without using packing. With the goal.

[0006]

[Means for Solving the Problems]

 According to a first aspect of the present invention, a fixed body made of a heat-welding resin, a fixed body attached to the fixed body and made of a heat-welding resin, the fixed body and the fixed body are provided. And a connecting portion formed on both sides of the fixed body and connected to the fixed body when the fixed body is attached to the fixed body, and at least one of the connecting portions of the fixed body and the fixed body is embedded in a partially exposed state and energized. Then, it is a resin part consisting of a conductor that generates heat. A heat-welding resin has the property that when it is heated to a certain value or more, the resin will be in a molten state, and when the temperature is below a certain value, the resin will solidify and the resins can be welded together. It is a resin. The conductor is specifically a copper wire, a nichrome wire, or the like.

According to a second aspect of the invention, there is provided a resin component according to the first aspect, further comprising a connecting portion urging means for pressing the connecting portion of the fixed body and the connecting portion of the fixed body. is there.

[0008]

[Embodiment of device]

 An embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a resin component 1 according to a first embodiment of the present invention. Reference numeral 3 indicates a case as a fixed body, and this case 3 is made of a heat-welding resin. A connecting portion 5 is formed on the inner side surface of the case 3, and an upper end surface 7 of the connecting portion 5 is formed in a rounded shape. A flat plate-shaped copper wire 9 is embedded in the upper end of the connecting portion 5, and both ends of the copper wire 9 project from the side surface of the case 3. The copper wire 9 is embedded as an insert when the case 3 is manufactured by insert molding. Therefore, it is not necessary to newly provide a step for burying the copper wire 9, and the cost increase can be minimized.

A terminal 13 is provided so as to penetrate the case 3, and one end of the terminal 13 projects into the opening of the fitting portion 11. The other end of the terminal 13 projects into the case 3 and is connected to an electronic component (not shown) mounted in the case 3. Since the copper wire 9 and the terminal 13 are made of the same material, the cost increase can be minimized. A convex portion 15 is provided on the rear surface of the case 3, and a hole 17 is formed on the bottom surface of the case 3. Reference numeral 19 indicates a lid as a fixed body. The lid 19 is made of a heat-welding resin, and a connecting portion 20 is provided at a portion of the lid 19 that contacts the upper end surface 7 of the connecting portion 5.

A method of fixing the lid 19 will be described. Electronic components are mounted on the case 3. Then, as shown in FIG. 3, the lid 19 is installed on the upper end surface 7, and the lid 19 is pressed by a pressing means (not shown) to press the connecting portion 20 against the upper end surface 7 to energize the copper wire 9 in this state. When the copper wire 9 is energized, the copper wire 9 generates heat, and as shown in FIG. 4, the upper end of the connecting portion 5 is melted, and the heat is transferred to the connecting portion 20 of the lid 19, and the connecting portion 20 is melted. The connecting portion 5 of the case 3 and the connecting portion 20 of the lid 19 are fused and integrated, and the lid 19 is welded to the case 3.

Therefore, since the lid 19 is integrally welded to the case 3, it is possible to completely block dust and water without using packing. Further, since the copper wire 9 is formed in a flat plate shape, it is possible to radiate heat over a wide range, and it is possible to melt the connecting portions 5 and 20 in a short time.

FIG. 5 shows a resin component 21 according to a second embodiment of the present invention. Since this resin component 21 has the same components as the resin component 1 according to the first embodiment, the same components are designated by the same reference numerals and the description thereof will be omitted. At the edge of the opening of the case 34, a claw 23 protruding toward the inside of the case 34 is formed. An inclined surface 25 is formed on the lower surface of the claw 23 so as to descend to the left in the figure. An inclined surface 31 corresponding to the inclined surface 25 is formed on the upper surface side edge of the lid 29. The claw 23 and the inclined surface 31 of the lid 29 constitute a connecting portion urging means.

A method of fixing the lid 29 will be described. As shown in FIG. 6, the lid 29 is fitted between the claw 23 and the upper end surface 7. The lid 29 is biased by its own elastic force in a direction in which the end 33 moves in the A direction. Further, the edge of the lid 29 is held between the claw 23 and the upper end surface 7, and movement of the end 33 in the A direction is restricted. Further, since the inclined surface 25 and the inclined surface 31 are joined, the elastic force of the lid 29 does not only move the end 33 in the direction A, but also presses the end 33 against the upper end surface 7. It is working.

By energizing, the copper wire 9 generates heat, the upper end of the connecting portion 5 melts, and further the connecting portion 20 of the lid 29 melts. As described above, the elastic force of the lid 29 acts not only in the direction of moving the end portion 33 in the A direction but also in the direction of pressing the end portion 33 against the upper end surface 7, and therefore the end portion 33 of the lid 29. Moves in the A direction, the connecting portion 20 of the lid 29 is pressed against the upper end surface 7 of the connecting portion 5, and the connecting portion 20 and the connecting portion 5 are welded to each other.

In the resin part 21, it is not necessary to press the lid 29 against the upper end surface 7 by the pressing means, and the resin part can be efficiently manufactured. As described above, with the resin-made components 1 and 21, the lid 29 can be easily fixed even when a tool or a place where the hand cannot be reached is simply energized to the copper wire 9.

Although the embodiment of the present invention has been described in detail above, the specific configuration is not limited to this embodiment, and there are modifications of the design within the scope not departing from the gist of the present invention. Also included in the present invention. For example, the object to be fixed and the object to be fixed are not limited to the combination of the case and the lid described above, and may be applied to any object as long as they connect two or more resin parts. It is possible. Further, the copper wire 9 can be provided on the lids 19 and 29 side instead of the cases 3 and 34 side. In the second embodiment, the claw 23 and the inclined surface 31 of the lid 29 are formed as the connecting portion urging means, but a spring or the like may be used.

[0017]

[Effect of device]

 As described above, according to the present invention, the work of connecting the fixed portion and the fixed portion can be easily performed. In addition, there is no possibility that the electronic component in which the resin component is housed becomes defective. Further, it becomes possible to prevent cracks and holes from being formed in the resin-made parts and to prevent defective adhesion. Moreover, it is possible to obtain high dustproofness and waterproofness without using packing. In addition, it is possible to easily fix the lid to the case even with tools and places where hands cannot reach.

[Brief description of drawings]

FIG. 1 is a perspective view of a resin component according to a first embodiment of the present invention.

FIG. 2 is a plan view of the case of the resin component according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional view of a resin component according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional view for explaining a method of welding a resin component according to the first embodiment of the present invention.

FIG. 5 is a plan view of a resin component according to a second embodiment of the present invention.

FIG. 6 is an enlarged cross-sectional view of a resin component according to a second embodiment of the present invention.

FIG. 7 is an enlarged cross-sectional view for explaining a welding method for resin parts according to a second embodiment of the present invention.

[Explanation of symbols]

 1, 21 Resin parts 3, 34 Case 5 Connecting part 7 Upper end surface 9 Copper wire 11 Fitting part 13 Terminal 15 Convex part 17 Hole 19, 29 Lid 20 Connecting part 23 Claw 25, 31 Inclined surface 33 End part

Claims (2)

[Scope of utility model registration request] 1. A fixed body made of a heat-welding resin, a fixed body made of a heat-fusible resin and attached to the fixed body, and both of the fixed body and the fixed body. It is embedded in a state in which a part is exposed to at least one of a connecting portion formed and connected to the fixed body when the fixed body is attached to the fixed body, and a connecting portion between the fixed body and the fixed body to generate heat when energized. Resin parts made up of conductors. 2. The resin component according to claim 1, further comprising connecting portion urging means for pressing the connecting portion of the fixed body and the connecting portion of the fixed body.